From afbaade3dc99838a0c39699bea175674f27322a1 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Fri, 8 Jun 2012 10:56:48 +0200 Subject: [PATCH 001/235] delete seven tty headers Commit 51c9d654c2def97827395a7fbfd0c6f865c26544 ("Staging: delete tty drivers") left seven headers unused: nothing in the tree includes them anymore. Two of those headers were still exported, but since nothing in the kernel actually uses the things those two headers provide, that seems pointless. Delete these seven tty headers too. Signed-off-by: Paul Bolle Cc: Arnd Bergmann Cc: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- include/linux/Kbuild | 2 - include/linux/cd1400.h | 292 --------------------- include/linux/cdk.h | 486 ---------------------------------- include/linux/comstats.h | 119 --------- include/linux/istallion.h | 123 --------- include/linux/sc26198.h | 533 -------------------------------------- include/linux/serial167.h | 157 ----------- include/linux/stallion.h | 147 ----------- 8 files changed, 1859 deletions(-) delete mode 100644 include/linux/cd1400.h delete mode 100644 include/linux/cdk.h delete mode 100644 include/linux/comstats.h delete mode 100644 include/linux/istallion.h delete mode 100644 include/linux/sc26198.h delete mode 100644 include/linux/serial167.h delete mode 100644 include/linux/stallion.h diff --git a/include/linux/Kbuild b/include/linux/Kbuild index 8760be30b37..0a8bcb6b9e2 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -84,7 +84,6 @@ header-y += capability.h header-y += capi.h header-y += cciss_defs.h header-y += cciss_ioctl.h -header-y += cdk.h header-y += cdrom.h header-y += cgroupstats.h header-y += chio.h @@ -93,7 +92,6 @@ header-y += cn_proc.h header-y += coda.h header-y += coda_psdev.h header-y += coff.h -header-y += comstats.h header-y += connector.h header-y += const.h header-y += cramfs_fs.h diff --git a/include/linux/cd1400.h b/include/linux/cd1400.h deleted file mode 100644 index 1dc3ab0523f..00000000000 --- a/include/linux/cd1400.h +++ /dev/null @@ -1,292 +0,0 @@ -/*****************************************************************************/ - -/* - * cd1400.h -- cd1400 UART hardware info. - * - * Copyright (C) 1996-1998 Stallion Technologies - * Copyright (C) 1994-1996 Greg Ungerer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _CD1400_H -#define _CD1400_H -/*****************************************************************************/ - -/* - * Define the number of async ports per cd1400 uart chip. - */ -#define CD1400_PORTS 4 - -/* - * Define the cd1400 uarts internal FIFO sizes. - */ -#define CD1400_TXFIFOSIZE 12 -#define CD1400_RXFIFOSIZE 12 - -/* - * Local RX FIFO thresh hold level. Also define the RTS thresh hold - * based on the RX thresh hold. - */ -#define FIFO_RXTHRESHOLD 6 -#define FIFO_RTSTHRESHOLD 7 - -/*****************************************************************************/ - -/* - * Define the cd1400 register addresses. These are all the valid - * registers with the cd1400. Some are global, some virtual, some - * per port. - */ -#define GFRCR 0x40 -#define CAR 0x68 -#define GCR 0x4b -#define SVRR 0x67 -#define RICR 0x44 -#define TICR 0x45 -#define MICR 0x46 -#define RIR 0x6b -#define TIR 0x6a -#define MIR 0x69 -#define PPR 0x7e - -#define RIVR 0x43 -#define TIVR 0x42 -#define MIVR 0x41 -#define TDR 0x63 -#define RDSR 0x62 -#define MISR 0x4c -#define EOSRR 0x60 - -#define LIVR 0x18 -#define CCR 0x05 -#define SRER 0x06 -#define COR1 0x08 -#define COR2 0x09 -#define COR3 0x0a -#define COR4 0x1e -#define COR5 0x1f -#define CCSR 0x0b -#define RDCR 0x0e -#define SCHR1 0x1a -#define SCHR2 0x1b -#define SCHR3 0x1c -#define SCHR4 0x1d -#define SCRL 0x22 -#define SCRH 0x23 -#define LNC 0x24 -#define MCOR1 0x15 -#define MCOR2 0x16 -#define RTPR 0x21 -#define MSVR1 0x6c -#define MSVR2 0x6d -#define PSVR 0x6f -#define RBPR 0x78 -#define RCOR 0x7c -#define TBPR 0x72 -#define TCOR 0x76 - -/*****************************************************************************/ - -/* - * Define the set of baud rate clock divisors. - */ -#define CD1400_CLK0 8 -#define CD1400_CLK1 32 -#define CD1400_CLK2 128 -#define CD1400_CLK3 512 -#define CD1400_CLK4 2048 - -#define CD1400_NUMCLKS 5 - -/*****************************************************************************/ - -/* - * Define the clock pre-scalar value to be a 5 ms clock. This should be - * OK for now. It would probably be better to make it 10 ms, but we - * can't fit that divisor into 8 bits! - */ -#define PPR_SCALAR 244 - -/*****************************************************************************/ - -/* - * Define values used to set character size options. - */ -#define COR1_CHL5 0x00 -#define COR1_CHL6 0x01 -#define COR1_CHL7 0x02 -#define COR1_CHL8 0x03 - -/* - * Define values used to set the number of stop bits. - */ -#define COR1_STOP1 0x00 -#define COR1_STOP15 0x04 -#define COR1_STOP2 0x08 - -/* - * Define values used to set the parity scheme in use. - */ -#define COR1_PARNONE 0x00 -#define COR1_PARFORCE 0x20 -#define COR1_PARENB 0x40 -#define COR1_PARIGNORE 0x10 - -#define COR1_PARODD 0x80 -#define COR1_PAREVEN 0x00 - -#define COR2_IXM 0x80 -#define COR2_TXIBE 0x40 -#define COR2_ETC 0x20 -#define COR2_LLM 0x10 -#define COR2_RLM 0x08 -#define COR2_RTSAO 0x04 -#define COR2_CTSAE 0x02 - -#define COR3_SCDRNG 0x80 -#define COR3_SCD34 0x40 -#define COR3_FCT 0x20 -#define COR3_SCD12 0x10 - -/* - * Define values used by COR4. - */ -#define COR4_BRKINT 0x08 -#define COR4_IGNBRK 0x18 - -/*****************************************************************************/ - -/* - * Define the modem control register values. - * Note that the actual hardware is a little different to the conventional - * pin names on the cd1400. - */ -#define MSVR1_DTR 0x01 -#define MSVR1_DSR 0x10 -#define MSVR1_RI 0x20 -#define MSVR1_CTS 0x40 -#define MSVR1_DCD 0x80 - -#define MSVR2_RTS 0x02 -#define MSVR2_DSR 0x10 -#define MSVR2_RI 0x20 -#define MSVR2_CTS 0x40 -#define MSVR2_DCD 0x80 - -#define MCOR1_DCD 0x80 -#define MCOR1_CTS 0x40 -#define MCOR1_RI 0x20 -#define MCOR1_DSR 0x10 - -#define MCOR2_DCD 0x80 -#define MCOR2_CTS 0x40 -#define MCOR2_RI 0x20 -#define MCOR2_DSR 0x10 - -/*****************************************************************************/ - -/* - * Define the bits used with the service (interrupt) enable register. - */ -#define SRER_NNDT 0x01 -#define SRER_TXEMPTY 0x02 -#define SRER_TXDATA 0x04 -#define SRER_RXDATA 0x10 -#define SRER_MODEM 0x80 - -/*****************************************************************************/ - -/* - * Define operational commands for the command register. - */ -#define CCR_RESET 0x80 -#define CCR_CORCHANGE 0x4e -#define CCR_SENDCH 0x20 -#define CCR_CHANCTRL 0x10 - -#define CCR_TXENABLE (CCR_CHANCTRL | 0x08) -#define CCR_TXDISABLE (CCR_CHANCTRL | 0x04) -#define CCR_RXENABLE (CCR_CHANCTRL | 0x02) -#define CCR_RXDISABLE (CCR_CHANCTRL | 0x01) - -#define CCR_SENDSCHR1 (CCR_SENDCH | 0x01) -#define CCR_SENDSCHR2 (CCR_SENDCH | 0x02) -#define CCR_SENDSCHR3 (CCR_SENDCH | 0x03) -#define CCR_SENDSCHR4 (CCR_SENDCH | 0x04) - -#define CCR_RESETCHAN (CCR_RESET | 0x00) -#define CCR_RESETFULL (CCR_RESET | 0x01) -#define CCR_TXFLUSHFIFO (CCR_RESET | 0x02) - -#define CCR_MAXWAIT 10000 - -/*****************************************************************************/ - -/* - * Define the valid acknowledgement types (for hw ack cycle). - */ -#define ACK_TYPMASK 0x07 -#define ACK_TYPTX 0x02 -#define ACK_TYPMDM 0x01 -#define ACK_TYPRXGOOD 0x03 -#define ACK_TYPRXBAD 0x07 - -#define SVRR_RX 0x01 -#define SVRR_TX 0x02 -#define SVRR_MDM 0x04 - -#define ST_OVERRUN 0x01 -#define ST_FRAMING 0x02 -#define ST_PARITY 0x04 -#define ST_BREAK 0x08 -#define ST_SCHAR1 0x10 -#define ST_SCHAR2 0x20 -#define ST_SCHAR3 0x30 -#define ST_SCHAR4 0x40 -#define ST_RANGE 0x70 -#define ST_SCHARMASK 0x70 -#define ST_TIMEOUT 0x80 - -#define MISR_DCD 0x80 -#define MISR_CTS 0x40 -#define MISR_RI 0x20 -#define MISR_DSR 0x10 - -/*****************************************************************************/ - -/* - * Defines for the CCSR status register. - */ -#define CCSR_RXENABLED 0x80 -#define CCSR_RXFLOWON 0x40 -#define CCSR_RXFLOWOFF 0x20 -#define CCSR_TXENABLED 0x08 -#define CCSR_TXFLOWON 0x04 -#define CCSR_TXFLOWOFF 0x02 - -/*****************************************************************************/ - -/* - * Define the embedded commands. - */ -#define ETC_CMD 0x00 -#define ETC_STARTBREAK 0x81 -#define ETC_DELAY 0x82 -#define ETC_STOPBREAK 0x83 - -/*****************************************************************************/ -#endif diff --git a/include/linux/cdk.h b/include/linux/cdk.h deleted file mode 100644 index 80093a8d4f6..00000000000 --- a/include/linux/cdk.h +++ /dev/null @@ -1,486 +0,0 @@ -/*****************************************************************************/ - -/* - * cdk.h -- CDK interface definitions. - * - * Copyright (C) 1996-1998 Stallion Technologies - * Copyright (C) 1994-1996 Greg Ungerer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _CDK_H -#define _CDK_H -/*****************************************************************************/ - -#pragma pack(2) - -/* - * The following set of definitions is used to communicate with the - * shared memory interface of the Stallion intelligent multiport serial - * boards. The definitions in this file are taken directly from the - * document titled "Generic Stackable Interface, Downloader and - * Communications Development Kit". - */ - -/* - * Define the set of important shared memory addresses. These are - * required to initialize the board and get things started. All of these - * addresses are relative to the start of the shared memory. - */ -#define CDK_SIGADDR 0x200 -#define CDK_FEATADDR 0x280 -#define CDK_CDKADDR 0x300 -#define CDK_RDYADDR 0x262 - -#define CDK_ALIVEMARKER 13 - -/* - * On hardware power up the ROMs located on the EasyConnection 8/64 will - * fill out the following signature information into shared memory. This - * way the host system can quickly determine that the board is present - * and is operational. - */ -typedef struct cdkecpsig { - unsigned long magic; - unsigned short romver; - unsigned short cputype; - unsigned char panelid[8]; -} cdkecpsig_t; - -#define ECP_MAGIC 0x21504345 - -/* - * On hardware power up the ROMs located on the ONboard, Stallion and - * Brumbys will fill out the following signature information into shared - * memory. This way the host system can quickly determine that the board - * is present and is operational. - */ -typedef struct cdkonbsig { - unsigned short magic0; - unsigned short magic1; - unsigned short magic2; - unsigned short magic3; - unsigned short romver; - unsigned short memoff; - unsigned short memseg; - unsigned short amask0; - unsigned short pic; - unsigned short status; - unsigned short btype; - unsigned short clkticks; - unsigned short clkspeed; - unsigned short amask1; - unsigned short amask2; -} cdkonbsig_t; - -#define ONB_MAGIC0 0xf2a7 -#define ONB_MAGIC1 0xa149 -#define ONB_MAGIC2 0x6352 -#define ONB_MAGIC3 0xf121 - -/* - * Define the feature area structure. The feature area is the set of - * startup parameters used by the slave image when it starts executing. - * They allow for the specification of buffer sizes, debug trace, etc. - */ -typedef struct cdkfeature { - unsigned long debug; - unsigned long banner; - unsigned long etype; - unsigned long nrdevs; - unsigned long brdspec; - unsigned long txrqsize; - unsigned long rxrqsize; - unsigned long flags; -} cdkfeature_t; - -#define ETYP_DDK 0 -#define ETYP_CDK 1 - -/* - * Define the CDK header structure. This is the info that the slave - * environment sets up after it has been downloaded and started. It - * essentially provides a memory map for the shared memory interface. - */ -typedef struct cdkhdr { - unsigned short command; - unsigned short status; - unsigned short port; - unsigned short mode; - unsigned long cmd_buf[14]; - unsigned short alive_cnt; - unsigned short intrpt_mode; - unsigned char intrpt_id[8]; - unsigned char ver_release; - unsigned char ver_modification; - unsigned char ver_fix; - unsigned char deadman_restart; - unsigned short deadman; - unsigned short nrdevs; - unsigned long memp; - unsigned long hostp; - unsigned long slavep; - unsigned char hostreq; - unsigned char slavereq; - unsigned char cmd_reserved[30]; -} cdkhdr_t; - -#define MODE_DDK 0 -#define MODE_CDK 1 - -#define IMD_INTR 0x0 -#define IMD_PPINTR 0x1 -#define IMD_POLL 0xff - -/* - * Define the memory mapping structure. This structure is pointed to by - * the memp field in the stlcdkhdr struct. As many as these structures - * as required are laid out in shared memory to define how the rest of - * shared memory is divided up. There will be one for each port. - */ -typedef struct cdkmem { - unsigned short dtype; - unsigned long offset; -} cdkmem_t; - -#define TYP_UNDEFINED 0x0 -#define TYP_ASYNCTRL 0x1 -#define TYP_ASYNC 0x20 -#define TYP_PARALLEL 0x40 -#define TYP_SYNCX21 0x60 - -/*****************************************************************************/ - -/* - * Following is a set of defines and structures used to actually deal - * with the serial ports on the board. Firstly is the set of commands - * that can be applied to ports. - */ -#define ASYCMD (((unsigned long) 'a') << 8) - -#define A_NULL (ASYCMD | 0) -#define A_FLUSH (ASYCMD | 1) -#define A_BREAK (ASYCMD | 2) -#define A_GETPORT (ASYCMD | 3) -#define A_SETPORT (ASYCMD | 4) -#define A_SETPORTF (ASYCMD | 5) -#define A_SETPORTFTX (ASYCMD | 6) -#define A_SETPORTFRX (ASYCMD | 7) -#define A_GETSIGNALS (ASYCMD | 8) -#define A_SETSIGNALS (ASYCMD | 9) -#define A_SETSIGNALSF (ASYCMD | 10) -#define A_SETSIGNALSFTX (ASYCMD | 11) -#define A_SETSIGNALSFRX (ASYCMD | 12) -#define A_GETNOTIFY (ASYCMD | 13) -#define A_SETNOTIFY (ASYCMD | 14) -#define A_NOTIFY (ASYCMD | 15) -#define A_PORTCTRL (ASYCMD | 16) -#define A_GETSTATS (ASYCMD | 17) -#define A_RQSTATE (ASYCMD | 18) -#define A_FLOWSTATE (ASYCMD | 19) -#define A_CLEARSTATS (ASYCMD | 20) - -/* - * Define those arguments used for simple commands. - */ -#define FLUSHRX 0x1 -#define FLUSHTX 0x2 - -#define BREAKON -1 -#define BREAKOFF -2 - -/* - * Define the port setting structure, and all those defines that go along - * with it. Basically this structure defines the characteristics of this - * port: baud rate, chars, parity, input/output char cooking etc. - */ -typedef struct asyport { - unsigned long baudout; - unsigned long baudin; - unsigned long iflag; - unsigned long oflag; - unsigned long lflag; - unsigned long pflag; - unsigned long flow; - unsigned long spare1; - unsigned short vtime; - unsigned short vmin; - unsigned short txlo; - unsigned short txhi; - unsigned short rxlo; - unsigned short rxhi; - unsigned short rxhog; - unsigned short spare2; - unsigned char csize; - unsigned char stopbs; - unsigned char parity; - unsigned char stopin; - unsigned char startin; - unsigned char stopout; - unsigned char startout; - unsigned char parmark; - unsigned char brkmark; - unsigned char cc[11]; -} asyport_t; - -#define PT_STOP1 0x0 -#define PT_STOP15 0x1 -#define PT_STOP2 0x2 - -#define PT_NOPARITY 0x0 -#define PT_ODDPARITY 0x1 -#define PT_EVENPARITY 0x2 -#define PT_MARKPARITY 0x3 -#define PT_SPACEPARITY 0x4 - -#define F_NONE 0x0 -#define F_IXON 0x1 -#define F_IXOFF 0x2 -#define F_IXANY 0x4 -#define F_IOXANY 0x8 -#define F_RTSFLOW 0x10 -#define F_CTSFLOW 0x20 -#define F_DTRFLOW 0x40 -#define F_DCDFLOW 0x80 -#define F_DSROFLOW 0x100 -#define F_DSRIFLOW 0x200 - -#define FI_NORX 0x1 -#define FI_RAW 0x2 -#define FI_ISTRIP 0x4 -#define FI_UCLC 0x8 -#define FI_INLCR 0x10 -#define FI_ICRNL 0x20 -#define FI_IGNCR 0x40 -#define FI_IGNBREAK 0x80 -#define FI_DSCRDBREAK 0x100 -#define FI_1MARKBREAK 0x200 -#define FI_2MARKBREAK 0x400 -#define FI_XCHNGBREAK 0x800 -#define FI_IGNRXERRS 0x1000 -#define FI_DSCDRXERRS 0x2000 -#define FI_1MARKRXERRS 0x4000 -#define FI_2MARKRXERRS 0x8000 -#define FI_XCHNGRXERRS 0x10000 -#define FI_DSCRDNULL 0x20000 - -#define FO_OLCUC 0x1 -#define FO_ONLCR 0x2 -#define FO_OOCRNL 0x4 -#define FO_ONOCR 0x8 -#define FO_ONLRET 0x10 -#define FO_ONL 0x20 -#define FO_OBS 0x40 -#define FO_OVT 0x80 -#define FO_OFF 0x100 -#define FO_OTAB1 0x200 -#define FO_OTAB2 0x400 -#define FO_OTAB3 0x800 -#define FO_OCR1 0x1000 -#define FO_OCR2 0x2000 -#define FO_OCR3 0x4000 -#define FO_OFILL 0x8000 -#define FO_ODELL 0x10000 - -#define P_RTSLOCK 0x1 -#define P_CTSLOCK 0x2 -#define P_MAPRTS 0x4 -#define P_MAPCTS 0x8 -#define P_LOOPBACK 0x10 -#define P_DTRFOLLOW 0x20 -#define P_FAKEDCD 0x40 - -#define P_RXIMIN 0x10000 -#define P_RXITIME 0x20000 -#define P_RXTHOLD 0x40000 - -/* - * Define a structure to communicate serial port signal and data state - * information. - */ -typedef struct asysigs { - unsigned long data; - unsigned long signal; - unsigned long sigvalue; -} asysigs_t; - -#define DT_TXBUSY 0x1 -#define DT_TXEMPTY 0x2 -#define DT_TXLOW 0x4 -#define DT_TXHIGH 0x8 -#define DT_TXFULL 0x10 -#define DT_TXHOG 0x20 -#define DT_TXFLOWED 0x40 -#define DT_TXBREAK 0x80 - -#define DT_RXBUSY 0x100 -#define DT_RXEMPTY 0x200 -#define DT_RXLOW 0x400 -#define DT_RXHIGH 0x800 -#define DT_RXFULL 0x1000 -#define DT_RXHOG 0x2000 -#define DT_RXFLOWED 0x4000 -#define DT_RXBREAK 0x8000 - -#define SG_DTR 0x1 -#define SG_DCD 0x2 -#define SG_RTS 0x4 -#define SG_CTS 0x8 -#define SG_DSR 0x10 -#define SG_RI 0x20 - -/* - * Define the notification setting structure. This is used to tell the - * port what events we want to be informed about. Fields here use the - * same defines as for the asysigs structure above. - */ -typedef struct asynotify { - unsigned long ctrl; - unsigned long data; - unsigned long signal; - unsigned long sigvalue; -} asynotify_t; - -/* - * Define the port control structure. It is used to do fine grain - * control operations on the port. - */ -typedef struct { - unsigned long rxctrl; - unsigned long txctrl; - char rximdch; - char tximdch; - char spare1; - char spare2; -} asyctrl_t; - -#define CT_ENABLE 0x1 -#define CT_DISABLE 0x2 -#define CT_STOP 0x4 -#define CT_START 0x8 -#define CT_STARTFLOW 0x10 -#define CT_STOPFLOW 0x20 -#define CT_SENDCHR 0x40 - -/* - * Define the stats structure kept for each port. This is a useful set - * of data collected for each port on the slave. The A_GETSTATS command - * is used to retrieve this data from the slave. - */ -typedef struct asystats { - unsigned long opens; - unsigned long txchars; - unsigned long rxchars; - unsigned long txringq; - unsigned long rxringq; - unsigned long txmsgs; - unsigned long rxmsgs; - unsigned long txflushes; - unsigned long rxflushes; - unsigned long overruns; - unsigned long framing; - unsigned long parity; - unsigned long ringover; - unsigned long lost; - unsigned long rxstart; - unsigned long rxstop; - unsigned long txstart; - unsigned long txstop; - unsigned long dcdcnt; - unsigned long dtrcnt; - unsigned long ctscnt; - unsigned long rtscnt; - unsigned long dsrcnt; - unsigned long ricnt; - unsigned long txbreaks; - unsigned long rxbreaks; - unsigned long signals; - unsigned long state; - unsigned long hwid; -} asystats_t; - -/*****************************************************************************/ - -/* - * All command and control communication with a device on the slave is - * via a control block in shared memory. Each device has its own control - * block, defined by the following structure. The control block allows - * the host to open, close and control the device on the slave. - */ -typedef struct cdkctrl { - unsigned char open; - unsigned char close; - unsigned long openarg; - unsigned long closearg; - unsigned long cmd; - unsigned long status; - unsigned long args[32]; -} cdkctrl_t; - -/* - * Each device on the slave passes data to and from the host via a ring - * queue in shared memory. Define a ring queue structure to hold the - * vital information about each ring queue. Two ring queues will be - * allocated for each port, one for receive data and one for transmit - * data. - */ -typedef struct cdkasyrq { - unsigned long offset; - unsigned short size; - unsigned short head; - unsigned short tail; -} cdkasyrq_t; - -/* - * Each asynchronous port is defined in shared memory by the following - * structure. It contains a control block to command a device, and also - * the necessary data channel information as well. - */ -typedef struct cdkasy { - cdkctrl_t ctrl; - unsigned short notify; - asynotify_t changed; - unsigned short receive; - cdkasyrq_t rxq; - unsigned short transmit; - cdkasyrq_t txq; -} cdkasy_t; - -#pragma pack() - -/*****************************************************************************/ - -/* - * Define the set of ioctls used by the driver to do special things - * to the board. These include interrupting it, and initializing - * the driver after board startup and shutdown. - */ -#include - -#define STL_BINTR _IO('s',20) -#define STL_BSTART _IO('s',21) -#define STL_BSTOP _IO('s',22) -#define STL_BRESET _IO('s',23) - -/* - * Define a set of ioctl extensions, used to get at special stuff. - */ -#define STL_GETPFLAG _IO('s',80) -#define STL_SETPFLAG _IO('s',81) - -/*****************************************************************************/ -#endif diff --git a/include/linux/comstats.h b/include/linux/comstats.h deleted file mode 100644 index 3f5ea8e8026..00000000000 --- a/include/linux/comstats.h +++ /dev/null @@ -1,119 +0,0 @@ -/*****************************************************************************/ - -/* - * comstats.h -- Serial Port Stats. - * - * Copyright (C) 1996-1998 Stallion Technologies - * Copyright (C) 1994-1996 Greg Ungerer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _COMSTATS_H -#define _COMSTATS_H -/*****************************************************************************/ - -/* - * Serial port stats structure. The structure itself is UART - * independent, but some fields may be UART/driver specific (for - * example state). - */ - -typedef struct { - unsigned long brd; - unsigned long panel; - unsigned long port; - unsigned long hwid; - unsigned long type; - unsigned long txtotal; - unsigned long rxtotal; - unsigned long txbuffered; - unsigned long rxbuffered; - unsigned long rxoverrun; - unsigned long rxparity; - unsigned long rxframing; - unsigned long rxlost; - unsigned long txbreaks; - unsigned long rxbreaks; - unsigned long txxon; - unsigned long txxoff; - unsigned long rxxon; - unsigned long rxxoff; - unsigned long txctson; - unsigned long txctsoff; - unsigned long rxrtson; - unsigned long rxrtsoff; - unsigned long modem; - unsigned long state; - unsigned long flags; - unsigned long ttystate; - unsigned long cflags; - unsigned long iflags; - unsigned long oflags; - unsigned long lflags; - unsigned long signals; -} comstats_t; - - -/* - * Board stats structure. Returns useful info about the board. - */ - -#define COM_MAXPANELS 8 - -typedef struct { - unsigned long panel; - unsigned long type; - unsigned long hwid; - unsigned long nrports; -} companel_t; - -typedef struct { - unsigned long brd; - unsigned long type; - unsigned long hwid; - unsigned long state; - unsigned long ioaddr; - unsigned long ioaddr2; - unsigned long memaddr; - unsigned long irq; - unsigned long nrpanels; - unsigned long nrports; - companel_t panels[COM_MAXPANELS]; -} combrd_t; - - -/* - * Define the ioctl operations for stats stuff. - */ -#include - -#define COM_GETPORTSTATS _IO('c',30) -#define COM_CLRPORTSTATS _IO('c',31) -#define COM_GETBRDSTATS _IO('c',32) - - -/* - * Define the set of ioctls that give user level access to the - * private port, panel and board structures. The argument required - * will be driver dependent! - */ -#define COM_READPORT _IO('c',40) -#define COM_READBOARD _IO('c',41) -#define COM_READPANEL _IO('c',42) - -/*****************************************************************************/ -#endif diff --git a/include/linux/istallion.h b/include/linux/istallion.h deleted file mode 100644 index ad700a60c15..00000000000 --- a/include/linux/istallion.h +++ /dev/null @@ -1,123 +0,0 @@ -/*****************************************************************************/ - -/* - * istallion.h -- stallion intelligent multiport serial driver. - * - * Copyright (C) 1996-1998 Stallion Technologies - * Copyright (C) 1994-1996 Greg Ungerer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _ISTALLION_H -#define _ISTALLION_H -/*****************************************************************************/ - -/* - * Define important driver constants here. - */ -#define STL_MAXBRDS 4 -#define STL_MAXPANELS 4 -#define STL_MAXPORTS 64 -#define STL_MAXCHANS (STL_MAXPORTS + 1) -#define STL_MAXDEVS (STL_MAXBRDS * STL_MAXPORTS) - - -/* - * Define a set of structures to hold all the board/panel/port info - * for our ports. These will be dynamically allocated as required at - * driver initialization time. - */ - -/* - * Port and board structures to hold status info about each object. - * The board structure contains pointers to structures for each port - * connected to it. Panels are not distinguished here, since - * communication with the slave board will always be on a per port - * basis. - */ -struct stliport { - unsigned long magic; - struct tty_port port; - unsigned int portnr; - unsigned int panelnr; - unsigned int brdnr; - unsigned long state; - unsigned int devnr; - int baud_base; - int custom_divisor; - int closing_wait; - int rc; - int argsize; - void *argp; - unsigned int rxmarkmsk; - wait_queue_head_t raw_wait; - struct asysigs asig; - unsigned long addr; - unsigned long rxoffset; - unsigned long txoffset; - unsigned long sigs; - unsigned long pflag; - unsigned int rxsize; - unsigned int txsize; - unsigned char reqbit; - unsigned char portidx; - unsigned char portbit; -}; - -/* - * Use a structure of function pointers to do board level operations. - * These include, enable/disable, paging shared memory, interrupting, etc. - */ -struct stlibrd { - unsigned long magic; - unsigned int brdnr; - unsigned int brdtype; - unsigned long state; - unsigned int nrpanels; - unsigned int nrports; - unsigned int nrdevs; - unsigned int iobase; - int iosize; - unsigned long memaddr; - void __iomem *membase; - unsigned long memsize; - int pagesize; - int hostoffset; - int slaveoffset; - int bitsize; - int enabval; - unsigned int panels[STL_MAXPANELS]; - int panelids[STL_MAXPANELS]; - void (*init)(struct stlibrd *brdp); - void (*enable)(struct stlibrd *brdp); - void (*reenable)(struct stlibrd *brdp); - void (*disable)(struct stlibrd *brdp); - void __iomem *(*getmemptr)(struct stlibrd *brdp, unsigned long offset, int line); - void (*intr)(struct stlibrd *brdp); - void (*reset)(struct stlibrd *brdp); - struct stliport *ports[STL_MAXPORTS]; -}; - - -/* - * Define MAGIC numbers used for above structures. - */ -#define STLI_PORTMAGIC 0xe671c7a1 -#define STLI_BOARDMAGIC 0x4bc6c825 - -/*****************************************************************************/ -#endif diff --git a/include/linux/sc26198.h b/include/linux/sc26198.h deleted file mode 100644 index 7ca35abad38..00000000000 --- a/include/linux/sc26198.h +++ /dev/null @@ -1,533 +0,0 @@ -/*****************************************************************************/ - -/* - * sc26198.h -- SC26198 UART hardware info. - * - * Copyright (C) 1995-1998 Stallion Technologies - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _SC26198_H -#define _SC26198_H -/*****************************************************************************/ - -/* - * Define the number of async ports per sc26198 uart device. - */ -#define SC26198_PORTS 8 - -/* - * Baud rate timing clocks. All derived from a master 14.7456 MHz clock. - */ -#define SC26198_MASTERCLOCK 14745600L -#define SC26198_DCLK (SC26198_MASTERCLOCK) -#define SC26198_CCLK (SC26198_MASTERCLOCK / 2) -#define SC26198_BCLK (SC26198_MASTERCLOCK / 4) - -/* - * Define internal FIFO sizes for the 26198 ports. - */ -#define SC26198_TXFIFOSIZE 16 -#define SC26198_RXFIFOSIZE 16 - -/*****************************************************************************/ - -/* - * Global register definitions. These registers are global to each 26198 - * device, not specific ports on it. - */ -#define TSTR 0x0d -#define GCCR 0x0f -#define ICR 0x1b -#define WDTRCR 0x1d -#define IVR 0x1f -#define BRGTRUA 0x84 -#define GPOSR 0x87 -#define GPOC 0x8b -#define UCIR 0x8c -#define CIR 0x8c -#define BRGTRUB 0x8d -#define GRXFIFO 0x8e -#define GTXFIFO 0x8e -#define GCCR2 0x8f -#define BRGTRLA 0x94 -#define GPOR 0x97 -#define GPOD 0x9b -#define BRGTCR 0x9c -#define GICR 0x9c -#define BRGTRLB 0x9d -#define GIBCR 0x9d -#define GITR 0x9f - -/* - * Per port channel registers. These are the register offsets within - * the port address space, so need to have the port address (0 to 7) - * inserted in bit positions 4:6. - */ -#define MR0 0x00 -#define MR1 0x01 -#define IOPCR 0x02 -#define BCRBRK 0x03 -#define BCRCOS 0x04 -#define BCRX 0x06 -#define BCRA 0x07 -#define XONCR 0x08 -#define XOFFCR 0x09 -#define ARCR 0x0a -#define RXCSR 0x0c -#define TXCSR 0x0e -#define MR2 0x80 -#define SR 0x81 -#define SCCR 0x81 -#define ISR 0x82 -#define IMR 0x82 -#define TXFIFO 0x83 -#define RXFIFO 0x83 -#define IPR 0x84 -#define IOPIOR 0x85 -#define XISR 0x86 - -/* - * For any given port calculate the address to use to access a specified - * register. This is only used for unusual access, mostly this is done - * through the assembler access routines. - */ -#define SC26198_PORTREG(port,reg) ((((port) & 0x07) << 4) | (reg)) - -/*****************************************************************************/ - -/* - * Global configuration control register bit definitions. - */ -#define GCCR_NOACK 0x00 -#define GCCR_IVRACK 0x02 -#define GCCR_IVRCHANACK 0x04 -#define GCCR_IVRTYPCHANACK 0x06 -#define GCCR_ASYNCCYCLE 0x00 -#define GCCR_SYNCCYCLE 0x40 - -/*****************************************************************************/ - -/* - * Mode register 0 bit definitions. - */ -#define MR0_ADDRNONE 0x00 -#define MR0_AUTOWAKE 0x01 -#define MR0_AUTODOZE 0x02 -#define MR0_AUTOWAKEDOZE 0x03 -#define MR0_SWFNONE 0x00 -#define MR0_SWFTX 0x04 -#define MR0_SWFRX 0x08 -#define MR0_SWFRXTX 0x0c -#define MR0_TXMASK 0x30 -#define MR0_TXEMPTY 0x00 -#define MR0_TXHIGH 0x10 -#define MR0_TXHALF 0x20 -#define MR0_TXRDY 0x00 -#define MR0_ADDRNT 0x00 -#define MR0_ADDRT 0x40 -#define MR0_SWFNT 0x00 -#define MR0_SWFT 0x80 - -/* - * Mode register 1 bit definitions. - */ -#define MR1_CS5 0x00 -#define MR1_CS6 0x01 -#define MR1_CS7 0x02 -#define MR1_CS8 0x03 -#define MR1_PAREVEN 0x00 -#define MR1_PARODD 0x04 -#define MR1_PARENB 0x00 -#define MR1_PARFORCE 0x08 -#define MR1_PARNONE 0x10 -#define MR1_PARSPECIAL 0x18 -#define MR1_ERRCHAR 0x00 -#define MR1_ERRBLOCK 0x20 -#define MR1_ISRUNMASKED 0x00 -#define MR1_ISRMASKED 0x40 -#define MR1_AUTORTS 0x80 - -/* - * Mode register 2 bit definitions. - */ -#define MR2_STOP1 0x00 -#define MR2_STOP15 0x01 -#define MR2_STOP2 0x02 -#define MR2_STOP916 0x03 -#define MR2_RXFIFORDY 0x00 -#define MR2_RXFIFOHALF 0x04 -#define MR2_RXFIFOHIGH 0x08 -#define MR2_RXFIFOFULL 0x0c -#define MR2_AUTOCTS 0x10 -#define MR2_TXRTS 0x20 -#define MR2_MODENORM 0x00 -#define MR2_MODEAUTOECHO 0x40 -#define MR2_MODELOOP 0x80 -#define MR2_MODEREMECHO 0xc0 - -/*****************************************************************************/ - -/* - * Baud Rate Generator (BRG) selector values. - */ -#define BRG_50 0x00 -#define BRG_75 0x01 -#define BRG_150 0x02 -#define BRG_200 0x03 -#define BRG_300 0x04 -#define BRG_450 0x05 -#define BRG_600 0x06 -#define BRG_900 0x07 -#define BRG_1200 0x08 -#define BRG_1800 0x09 -#define BRG_2400 0x0a -#define BRG_3600 0x0b -#define BRG_4800 0x0c -#define BRG_7200 0x0d -#define BRG_9600 0x0e -#define BRG_14400 0x0f -#define BRG_19200 0x10 -#define BRG_28200 0x11 -#define BRG_38400 0x12 -#define BRG_57600 0x13 -#define BRG_115200 0x14 -#define BRG_230400 0x15 -#define BRG_GIN0 0x16 -#define BRG_GIN1 0x17 -#define BRG_CT0 0x18 -#define BRG_CT1 0x19 -#define BRG_RX2TX316 0x1b -#define BRG_RX2TX31 0x1c - -#define SC26198_MAXBAUD 921600 - -/*****************************************************************************/ - -/* - * Command register command definitions. - */ -#define CR_NULL 0x04 -#define CR_ADDRNORMAL 0x0c -#define CR_RXRESET 0x14 -#define CR_TXRESET 0x1c -#define CR_CLEARRXERR 0x24 -#define CR_BREAKRESET 0x2c -#define CR_TXSTARTBREAK 0x34 -#define CR_TXSTOPBREAK 0x3c -#define CR_RTSON 0x44 -#define CR_RTSOFF 0x4c -#define CR_ADDRINIT 0x5c -#define CR_RXERRBLOCK 0x6c -#define CR_TXSENDXON 0x84 -#define CR_TXSENDXOFF 0x8c -#define CR_GANGXONSET 0x94 -#define CR_GANGXOFFSET 0x9c -#define CR_GANGXONINIT 0xa4 -#define CR_GANGXOFFINIT 0xac -#define CR_HOSTXON 0xb4 -#define CR_HOSTXOFF 0xbc -#define CR_CANCELXOFF 0xc4 -#define CR_ADDRRESET 0xdc -#define CR_RESETALLPORTS 0xf4 -#define CR_RESETALL 0xfc - -#define CR_RXENABLE 0x01 -#define CR_TXENABLE 0x02 - -/*****************************************************************************/ - -/* - * Channel status register. - */ -#define SR_RXRDY 0x01 -#define SR_RXFULL 0x02 -#define SR_TXRDY 0x04 -#define SR_TXEMPTY 0x08 -#define SR_RXOVERRUN 0x10 -#define SR_RXPARITY 0x20 -#define SR_RXFRAMING 0x40 -#define SR_RXBREAK 0x80 - -#define SR_RXERRS (SR_RXPARITY | SR_RXFRAMING | SR_RXOVERRUN) - -/*****************************************************************************/ - -/* - * Interrupt status register and interrupt mask register bit definitions. - */ -#define IR_TXRDY 0x01 -#define IR_RXRDY 0x02 -#define IR_RXBREAK 0x04 -#define IR_XONXOFF 0x10 -#define IR_ADDRRECOG 0x20 -#define IR_RXWATCHDOG 0x40 -#define IR_IOPORT 0x80 - -/*****************************************************************************/ - -/* - * Interrupt vector register field definitions. - */ -#define IVR_CHANMASK 0x07 -#define IVR_TYPEMASK 0x18 -#define IVR_CONSTMASK 0xc0 - -#define IVR_RXDATA 0x10 -#define IVR_RXBADDATA 0x18 -#define IVR_TXDATA 0x08 -#define IVR_OTHER 0x00 - -/*****************************************************************************/ - -/* - * BRG timer control register bit definitions. - */ -#define BRGCTCR_DISABCLK0 0x00 -#define BRGCTCR_ENABCLK0 0x08 -#define BRGCTCR_DISABCLK1 0x00 -#define BRGCTCR_ENABCLK1 0x80 - -#define BRGCTCR_0SCLK16 0x00 -#define BRGCTCR_0SCLK32 0x01 -#define BRGCTCR_0SCLK64 0x02 -#define BRGCTCR_0SCLK128 0x03 -#define BRGCTCR_0X1 0x04 -#define BRGCTCR_0X12 0x05 -#define BRGCTCR_0IO1A 0x06 -#define BRGCTCR_0GIN0 0x07 - -#define BRGCTCR_1SCLK16 0x00 -#define BRGCTCR_1SCLK32 0x10 -#define BRGCTCR_1SCLK64 0x20 -#define BRGCTCR_1SCLK128 0x30 -#define BRGCTCR_1X1 0x40 -#define BRGCTCR_1X12 0x50 -#define BRGCTCR_1IO1B 0x60 -#define BRGCTCR_1GIN1 0x70 - -/*****************************************************************************/ - -/* - * Watch dog timer enable register. - */ -#define WDTRCR_ENABALL 0xff - -/*****************************************************************************/ - -/* - * XON/XOFF interrupt status register. - */ -#define XISR_TXCHARMASK 0x03 -#define XISR_TXCHARNORMAL 0x00 -#define XISR_TXWAIT 0x01 -#define XISR_TXXOFFPEND 0x02 -#define XISR_TXXONPEND 0x03 - -#define XISR_TXFLOWMASK 0x0c -#define XISR_TXNORMAL 0x00 -#define XISR_TXSTOPPEND 0x04 -#define XISR_TXSTARTED 0x08 -#define XISR_TXSTOPPED 0x0c - -#define XISR_RXFLOWMASK 0x30 -#define XISR_RXFLOWNONE 0x00 -#define XISR_RXXONSENT 0x10 -#define XISR_RXXOFFSENT 0x20 - -#define XISR_RXXONGOT 0x40 -#define XISR_RXXOFFGOT 0x80 - -/*****************************************************************************/ - -/* - * Current interrupt register. - */ -#define CIR_TYPEMASK 0xc0 -#define CIR_TYPEOTHER 0x00 -#define CIR_TYPETX 0x40 -#define CIR_TYPERXGOOD 0x80 -#define CIR_TYPERXBAD 0xc0 - -#define CIR_RXDATA 0x80 -#define CIR_RXBADDATA 0x40 -#define CIR_TXDATA 0x40 - -#define CIR_CHANMASK 0x07 -#define CIR_CNTMASK 0x38 - -#define CIR_SUBTYPEMASK 0x38 -#define CIR_SUBNONE 0x00 -#define CIR_SUBCOS 0x08 -#define CIR_SUBADDR 0x10 -#define CIR_SUBXONXOFF 0x18 -#define CIR_SUBBREAK 0x28 - -/*****************************************************************************/ - -/* - * Global interrupting channel register. - */ -#define GICR_CHANMASK 0x07 - -/*****************************************************************************/ - -/* - * Global interrupting byte count register. - */ -#define GICR_COUNTMASK 0x0f - -/*****************************************************************************/ - -/* - * Global interrupting type register. - */ -#define GITR_RXMASK 0xc0 -#define GITR_RXNONE 0x00 -#define GITR_RXBADDATA 0x80 -#define GITR_RXGOODDATA 0xc0 -#define GITR_TXDATA 0x20 - -#define GITR_SUBTYPEMASK 0x07 -#define GITR_SUBNONE 0x00 -#define GITR_SUBCOS 0x01 -#define GITR_SUBADDR 0x02 -#define GITR_SUBXONXOFF 0x03 -#define GITR_SUBBREAK 0x05 - -/*****************************************************************************/ - -/* - * Input port change register. - */ -#define IPR_CTS 0x01 -#define IPR_DTR 0x02 -#define IPR_RTS 0x04 -#define IPR_DCD 0x08 -#define IPR_CTSCHANGE 0x10 -#define IPR_DTRCHANGE 0x20 -#define IPR_RTSCHANGE 0x40 -#define IPR_DCDCHANGE 0x80 - -#define IPR_CHANGEMASK 0xf0 - -/*****************************************************************************/ - -/* - * IO port interrupt and output register. - */ -#define IOPR_CTS 0x01 -#define IOPR_DTR 0x02 -#define IOPR_RTS 0x04 -#define IOPR_DCD 0x08 -#define IOPR_CTSCOS 0x10 -#define IOPR_DTRCOS 0x20 -#define IOPR_RTSCOS 0x40 -#define IOPR_DCDCOS 0x80 - -/*****************************************************************************/ - -/* - * IO port configuration register. - */ -#define IOPCR_SETCTS 0x00 -#define IOPCR_SETDTR 0x04 -#define IOPCR_SETRTS 0x10 -#define IOPCR_SETDCD 0x00 - -#define IOPCR_SETSIGS (IOPCR_SETRTS | IOPCR_SETRTS | IOPCR_SETDTR | IOPCR_SETDCD) - -/*****************************************************************************/ - -/* - * General purpose output select register. - */ -#define GPORS_TXC1XA 0x08 -#define GPORS_TXC16XA 0x09 -#define GPORS_RXC16XA 0x0a -#define GPORS_TXC16XB 0x0b -#define GPORS_GPOR3 0x0c -#define GPORS_GPOR2 0x0d -#define GPORS_GPOR1 0x0e -#define GPORS_GPOR0 0x0f - -/*****************************************************************************/ - -/* - * General purpose output register. - */ -#define GPOR_0 0x01 -#define GPOR_1 0x02 -#define GPOR_2 0x04 -#define GPOR_3 0x08 - -/*****************************************************************************/ - -/* - * General purpose output clock register. - */ -#define GPORC_0NONE 0x00 -#define GPORC_0GIN0 0x01 -#define GPORC_0GIN1 0x02 -#define GPORC_0IO3A 0x02 - -#define GPORC_1NONE 0x00 -#define GPORC_1GIN0 0x04 -#define GPORC_1GIN1 0x08 -#define GPORC_1IO3C 0x0c - -#define GPORC_2NONE 0x00 -#define GPORC_2GIN0 0x10 -#define GPORC_2GIN1 0x20 -#define GPORC_2IO3E 0x20 - -#define GPORC_3NONE 0x00 -#define GPORC_3GIN0 0x40 -#define GPORC_3GIN1 0x80 -#define GPORC_3IO3G 0xc0 - -/*****************************************************************************/ - -/* - * General purpose output data register. - */ -#define GPOD_0MASK 0x03 -#define GPOD_0SET1 0x00 -#define GPOD_0SET0 0x01 -#define GPOD_0SETR0 0x02 -#define GPOD_0SETIO3B 0x03 - -#define GPOD_1MASK 0x0c -#define GPOD_1SET1 0x00 -#define GPOD_1SET0 0x04 -#define GPOD_1SETR0 0x08 -#define GPOD_1SETIO3D 0x0c - -#define GPOD_2MASK 0x30 -#define GPOD_2SET1 0x00 -#define GPOD_2SET0 0x10 -#define GPOD_2SETR0 0x20 -#define GPOD_2SETIO3F 0x30 - -#define GPOD_3MASK 0xc0 -#define GPOD_3SET1 0x00 -#define GPOD_3SET0 0x40 -#define GPOD_3SETR0 0x80 -#define GPOD_3SETIO3H 0xc0 - -/*****************************************************************************/ -#endif diff --git a/include/linux/serial167.h b/include/linux/serial167.h deleted file mode 100644 index 59c81b70856..00000000000 --- a/include/linux/serial167.h +++ /dev/null @@ -1,157 +0,0 @@ -/* - * serial167.h - * - * Richard Hirst [richard@sleepie.demon.co.uk] - * - * Based on cyclades.h - */ - -struct cyclades_monitor { - unsigned long int_count; - unsigned long char_count; - unsigned long char_max; - unsigned long char_last; -}; - -/* - * This is our internal structure for each serial port's state. - * - * Many fields are paralleled by the structure used by the serial_struct - * structure. - * - * For definitions of the flags field, see tty.h - */ - -struct cyclades_port { - int magic; - int type; - int card; - int line; - int flags; /* defined in tty.h */ - struct tty_struct *tty; - int read_status_mask; - int timeout; - int xmit_fifo_size; - int cor1,cor2,cor3,cor4,cor5,cor6,cor7; - int tbpr,tco,rbpr,rco; - int ignore_status_mask; - int close_delay; - int IER; /* Interrupt Enable Register */ - unsigned long last_active; - int count; /* # of fd on device */ - int x_char; /* to be pushed out ASAP */ - int x_break; - int blocked_open; /* # of blocked opens */ - unsigned char *xmit_buf; - int xmit_head; - int xmit_tail; - int xmit_cnt; - int default_threshold; - int default_timeout; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; - struct cyclades_monitor mon; -}; - -#define CYCLADES_MAGIC 0x4359 - -#define CYGETMON 0x435901 -#define CYGETTHRESH 0x435902 -#define CYSETTHRESH 0x435903 -#define CYGETDEFTHRESH 0x435904 -#define CYSETDEFTHRESH 0x435905 -#define CYGETTIMEOUT 0x435906 -#define CYSETTIMEOUT 0x435907 -#define CYGETDEFTIMEOUT 0x435908 -#define CYSETDEFTIMEOUT 0x435909 - -#define CyMaxChipsPerCard 1 - -/**** cd2401 registers ****/ - -#define CyGFRCR (0x81) -#define CyCCR (0x13) -#define CyCLR_CHAN (0x40) -#define CyINIT_CHAN (0x20) -#define CyCHIP_RESET (0x10) -#define CyENB_XMTR (0x08) -#define CyDIS_XMTR (0x04) -#define CyENB_RCVR (0x02) -#define CyDIS_RCVR (0x01) -#define CyCAR (0xee) -#define CyIER (0x11) -#define CyMdmCh (0x80) -#define CyRxExc (0x20) -#define CyRxData (0x08) -#define CyTxMpty (0x02) -#define CyTxRdy (0x01) -#define CyLICR (0x26) -#define CyRISR (0x89) -#define CyTIMEOUT (0x80) -#define CySPECHAR (0x70) -#define CyOVERRUN (0x08) -#define CyPARITY (0x04) -#define CyFRAME (0x02) -#define CyBREAK (0x01) -#define CyREOIR (0x84) -#define CyTEOIR (0x85) -#define CyMEOIR (0x86) -#define CyNOTRANS (0x08) -#define CyRFOC (0x30) -#define CyRDR (0xf8) -#define CyTDR (0xf8) -#define CyMISR (0x8b) -#define CyRISR (0x89) -#define CyTISR (0x8a) -#define CyMSVR1 (0xde) -#define CyMSVR2 (0xdf) -#define CyDSR (0x80) -#define CyDCD (0x40) -#define CyCTS (0x20) -#define CyDTR (0x02) -#define CyRTS (0x01) -#define CyRTPRL (0x25) -#define CyRTPRH (0x24) -#define CyCOR1 (0x10) -#define CyPARITY_NONE (0x00) -#define CyPARITY_E (0x40) -#define CyPARITY_O (0xC0) -#define Cy_5_BITS (0x04) -#define Cy_6_BITS (0x05) -#define Cy_7_BITS (0x06) -#define Cy_8_BITS (0x07) -#define CyCOR2 (0x17) -#define CyETC (0x20) -#define CyCtsAE (0x02) -#define CyCOR3 (0x16) -#define Cy_1_STOP (0x02) -#define Cy_2_STOP (0x04) -#define CyCOR4 (0x15) -#define CyREC_FIFO (0x0F) /* Receive FIFO threshold */ -#define CyCOR5 (0x14) -#define CyCOR6 (0x18) -#define CyCOR7 (0x07) -#define CyRBPR (0xcb) -#define CyRCOR (0xc8) -#define CyTBPR (0xc3) -#define CyTCOR (0xc0) -#define CySCHR1 (0x1f) -#define CySCHR2 (0x1e) -#define CyTPR (0xda) -#define CyPILR1 (0xe3) -#define CyPILR2 (0xe0) -#define CyPILR3 (0xe1) -#define CyCMR (0x1b) -#define CyASYNC (0x02) -#define CyLICR (0x26) -#define CyLIVR (0x09) -#define CySCRL (0x23) -#define CySCRH (0x22) -#define CyTFTC (0x80) - - -/* max number of chars in the FIFO */ - -#define CyMAX_CHAR_FIFO 12 - -/***************************************************************************/ diff --git a/include/linux/stallion.h b/include/linux/stallion.h deleted file mode 100644 index 336af33c6ea..00000000000 --- a/include/linux/stallion.h +++ /dev/null @@ -1,147 +0,0 @@ -/*****************************************************************************/ - -/* - * stallion.h -- stallion multiport serial driver. - * - * Copyright (C) 1996-1998 Stallion Technologies - * Copyright (C) 1994-1996 Greg Ungerer. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/*****************************************************************************/ -#ifndef _STALLION_H -#define _STALLION_H -/*****************************************************************************/ - -/* - * Define important driver constants here. - */ -#define STL_MAXBRDS 4 -#define STL_MAXPANELS 4 -#define STL_MAXBANKS 8 -#define STL_PORTSPERPANEL 16 -#define STL_MAXPORTS 64 -#define STL_MAXDEVS (STL_MAXBRDS * STL_MAXPORTS) - - -/* - * Define a set of structures to hold all the board/panel/port info - * for our ports. These will be dynamically allocated as required. - */ - -/* - * Define a ring queue structure for each port. This will hold the - * TX data waiting to be output. Characters are fed into this buffer - * from the line discipline (or even direct from user space!) and - * then fed into the UARTs during interrupts. Will use a classic ring - * queue here for this. The good thing about this type of ring queue - * is that the head and tail pointers can be updated without interrupt - * protection - since "write" code only needs to change the head, and - * interrupt code only needs to change the tail. - */ -struct stlrq { - char *buf; - char *head; - char *tail; -}; - -/* - * Port, panel and board structures to hold status info about each. - * The board structure contains pointers to structures for each panel - * connected to it, and in turn each panel structure contains pointers - * for each port structure for each port on that panel. Note that - * the port structure also contains the board and panel number that it - * is associated with, this makes it (fairly) easy to get back to the - * board/panel info for a port. - */ -struct stlport { - unsigned long magic; - struct tty_port port; - unsigned int portnr; - unsigned int panelnr; - unsigned int brdnr; - int ioaddr; - int uartaddr; - unsigned int pagenr; - unsigned long istate; - int baud_base; - int custom_divisor; - int close_delay; - int closing_wait; - int openwaitcnt; - int brklen; - unsigned int sigs; - unsigned int rxignoremsk; - unsigned int rxmarkmsk; - unsigned int imr; - unsigned int crenable; - unsigned long clk; - unsigned long hwid; - void *uartp; - comstats_t stats; - struct stlrq tx; -}; - -struct stlpanel { - unsigned long magic; - unsigned int panelnr; - unsigned int brdnr; - unsigned int pagenr; - unsigned int nrports; - int iobase; - void *uartp; - void (*isr)(struct stlpanel *panelp, unsigned int iobase); - unsigned int hwid; - unsigned int ackmask; - struct stlport *ports[STL_PORTSPERPANEL]; -}; - -struct stlbrd { - unsigned long magic; - unsigned int brdnr; - unsigned int brdtype; - unsigned int state; - unsigned int nrpanels; - unsigned int nrports; - unsigned int nrbnks; - int irq; - int irqtype; - int (*isr)(struct stlbrd *brdp); - unsigned int ioaddr1; - unsigned int ioaddr2; - unsigned int iosize1; - unsigned int iosize2; - unsigned int iostatus; - unsigned int ioctrl; - unsigned int ioctrlval; - unsigned int hwid; - unsigned long clk; - unsigned int bnkpageaddr[STL_MAXBANKS]; - unsigned int bnkstataddr[STL_MAXBANKS]; - struct stlpanel *bnk2panel[STL_MAXBANKS]; - struct stlpanel *panels[STL_MAXPANELS]; -}; - - -/* - * Define MAGIC numbers used for above structures. - */ -#define STL_PORTMAGIC 0x5a7182c9 -#define STL_PANELMAGIC 0x7ef621a1 -#define STL_BOARDMAGIC 0xa2267f52 - -/*****************************************************************************/ -#endif From 4a055c9c9e1b9c6ea677a3f8187e70339ff47358 Mon Sep 17 00:00:00 2001 From: Paul Bolle Date: Fri, 8 Jun 2012 11:37:00 +0200 Subject: [PATCH 002/235] Delete generic_serial.h Commit bb2a97e9ccd525dd9c3326988e8c676d15d3e12a ("Staging: delete generic_serial drivers") left generic_serial.h unused: nothing in the tree includes it anymore. It is still exported, but since nothing in the kernel uses the named constants this header provides, that seems pointless. Delete this header too. Signed-off-by: Paul Bolle Cc: Arnd Bergmann Cc: Alan Cox Cc: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- include/linux/Kbuild | 1 - include/linux/generic_serial.h | 35 ---------------------------------- 2 files changed, 36 deletions(-) delete mode 100644 include/linux/generic_serial.h diff --git a/include/linux/Kbuild b/include/linux/Kbuild index 0a8bcb6b9e2..cf41085e333 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -138,7 +138,6 @@ header-y += fuse.h header-y += futex.h header-y += gameport.h header-y += gen_stats.h -header-y += generic_serial.h header-y += genetlink.h header-y += gfs2_ondisk.h header-y += gigaset_dev.h diff --git a/include/linux/generic_serial.h b/include/linux/generic_serial.h deleted file mode 100644 index 79b3eb37243..00000000000 --- a/include/linux/generic_serial.h +++ /dev/null @@ -1,35 +0,0 @@ -/* - * generic_serial.h - * - * Copyright (C) 1998 R.E.Wolff@BitWizard.nl - * - * written for the SX serial driver. - * - * Version 0.1 -- December, 1998. - */ - -#ifndef GENERIC_SERIAL_H -#define GENERIC_SERIAL_H - -#warning Use of this header is deprecated. -#warning Since nobody sets the constants defined here for you, you should not, in any case, use them. Including the header is thus pointless. - -/* Flags */ -/* Warning: serial.h defines some ASYNC_ flags, they say they are "only" - used in serial.c, but they are also used in all other serial drivers. - Make sure they don't clash with these here... */ -#define GS_TX_INTEN 0x00800000 -#define GS_RX_INTEN 0x00400000 -#define GS_ACTIVE 0x00200000 - -#define GS_TYPE_NORMAL 1 - -#define GS_DEBUG_FLUSH 0x00000001 -#define GS_DEBUG_BTR 0x00000002 -#define GS_DEBUG_TERMIOS 0x00000004 -#define GS_DEBUG_STUFF 0x00000008 -#define GS_DEBUG_CLOSE 0x00000010 -#define GS_DEBUG_FLOW 0x00000020 -#define GS_DEBUG_WRITE 0x00000040 - -#endif From 7cd88831feb03cadb355d5fb2b18ebe284c1f1e3 Mon Sep 17 00:00:00 2001 From: Kyoungil Kim Date: Sun, 20 May 2012 17:45:54 +0900 Subject: [PATCH 003/235] serial: samsung: Remove NULL checking for baud clock Signed-off-by: Kyoungil Kim Suggested-by: Russell King Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index d8b0aee3563..56685387f8e 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -529,7 +529,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, switch (level) { case 3: - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) + if (!IS_ERR(ourport->baudclk)) clk_disable(ourport->baudclk); clk_disable(ourport->clk); @@ -538,7 +538,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, case 0: clk_enable(ourport->clk); - if (!IS_ERR(ourport->baudclk) && ourport->baudclk != NULL) + if (!IS_ERR(ourport->baudclk)) clk_enable(ourport->baudclk); break; @@ -604,7 +604,6 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport, char clkname[MAX_CLK_NAME_LENGTH]; int calc_deviation, deviation = (1 << 30) - 1; - *best_clk = NULL; clk_sel = (ourport->cfg->clk_sel) ? ourport->cfg->clk_sel : ourport->info->def_clk_sel; for (cnt = 0; cnt < info->num_clks; cnt++) { @@ -613,7 +612,7 @@ static unsigned int s3c24xx_serial_getclk(struct s3c24xx_uart_port *ourport, sprintf(clkname, "clk_uart_baud%d", cnt); clk = clk_get(ourport->port.dev, clkname); - if (IS_ERR_OR_NULL(clk)) + if (IS_ERR(clk)) continue; rate = clk_get_rate(clk); @@ -684,7 +683,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, { struct s3c2410_uartcfg *cfg = s3c24xx_port_to_cfg(port); struct s3c24xx_uart_port *ourport = to_ourport(port); - struct clk *clk = NULL; + struct clk *clk = ERR_PTR(-EINVAL); unsigned long flags; unsigned int baud, quot, clk_sel = 0; unsigned int ulcon; @@ -705,7 +704,7 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, quot = s3c24xx_serial_getclk(ourport, baud, &clk, &clk_sel); if (baud == 38400 && (port->flags & UPF_SPD_MASK) == UPF_SPD_CUST) quot = port->custom_divisor; - if (!clk) + if (IS_ERR(clk)) return; /* check to see if we need to change clock source */ @@ -713,9 +712,9 @@ static void s3c24xx_serial_set_termios(struct uart_port *port, if (ourport->baudclk != clk) { s3c24xx_serial_setsource(port, clk_sel); - if (ourport->baudclk != NULL && !IS_ERR(ourport->baudclk)) { + if (!IS_ERR(ourport->baudclk)) { clk_disable(ourport->baudclk); - ourport->baudclk = NULL; + ourport->baudclk = ERR_PTR(-EINVAL); } clk_enable(clk); @@ -1160,6 +1159,9 @@ static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, struct uart_port *port = s3c24xx_dev_to_port(dev); struct s3c24xx_uart_port *ourport = to_ourport(port); + if (IS_ERR(ourport->baudclk)) + return -EINVAL; + return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->baudclk->name); } @@ -1200,6 +1202,7 @@ static int s3c24xx_serial_probe(struct platform_device *pdev) return -ENODEV; } + ourport->baudclk = ERR_PTR(-EINVAL); ourport->info = ourport->drv_data->info; ourport->cfg = (pdev->dev.platform_data) ? (struct s3c2410_uartcfg *)pdev->dev.platform_data : @@ -1387,7 +1390,7 @@ s3c24xx_serial_get_options(struct uart_port *port, int *baud, sprintf(clk_name, "clk_uart_baud%d", clk_sel); clk = clk_get(port->dev, clk_name); - if (!IS_ERR(clk) && clk != NULL) + if (!IS_ERR(clk)) rate = clk_get_rate(clk); else rate = 1; From 25f04ad423e5eb40c33a904db5a0d2c7e3bf08f5 Mon Sep 17 00:00:00 2001 From: Kyoungil Kim Date: Sun, 20 May 2012 17:49:31 +0900 Subject: [PATCH 004/235] serial: samsung: Fixed wrong comparison for baudclk_rate port->baudclk_rate should be compared to the rate of port->baudclk, because port->baudclk_rate was assigned as the rate of port->baudclk previously. So to check that the current baudclk rate is same as previous rate, the target of comparison sholud be the rate of port->baudclk. Signed-off-by: Jun-Ho, Yoon Signed-off-by: Kyoungil Kim Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 56685387f8e..cefdd2d7c58 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1013,10 +1013,10 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, * a disturbance in the clock-rate over the change. */ - if (IS_ERR(port->clk)) + if (IS_ERR(port->baudclk)) goto exit; - if (port->baudclk_rate == clk_get_rate(port->clk)) + if (port->baudclk_rate == clk_get_rate(port->baudclk)) goto exit; if (val == CPUFREQ_PRECHANGE) { From 7b15e1d9e342aca6c65f4824f1957f5245fcd87a Mon Sep 17 00:00:00 2001 From: KeyYoung Park Date: Wed, 30 May 2012 17:29:55 +0900 Subject: [PATCH 005/235] serial: samsung: protect NULL dereference of clock name When priting the serial clock source, if clock source name is null, kernel reference NULL point. Signed-off-by: KeyYoung Park Signed-off-by: Huisung Kang Signed-off-by: Kyoungil Kim Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index cefdd2d7c58..d57f165d6be 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1162,7 +1162,8 @@ static ssize_t s3c24xx_serial_show_clksrc(struct device *dev, if (IS_ERR(ourport->baudclk)) return -EINVAL; - return snprintf(buf, PAGE_SIZE, "* %s\n", ourport->baudclk->name); + return snprintf(buf, PAGE_SIZE, "* %s\n", + ourport->baudclk->name ?: "(null)"); } static DEVICE_ATTR(clock_source, S_IRUGO, s3c24xx_serial_show_clksrc, NULL); From 7d0b066fbb912debc18e9556187f2d0313b8469e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Mon, 21 May 2012 21:57:39 +0200 Subject: [PATCH 006/235] serial/imx: make devdata member point to const data MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is only cosmetic for now. In case that http://mid.gmane.org/1335171381-24869-1-git-send-email-u.kleine-koenig@pengutronix.de will be applied, it fixes a warning drivers/tty/serial/imx.c: In function 'serial_imx_probe_dt': drivers/tty/serial/imx.c:1430:17: warning: assignment discards 'const' qualifier from pointer target type [enabled by default] though. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 4ef747307ec..0af4eec8c7b 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -207,7 +207,7 @@ struct imx_port { unsigned short trcv_delay; /* transceiver delay */ struct clk *clk_ipg; struct clk *clk_per; - struct imx_uart_data *devdata; + const struct imx_uart_data *devdata; }; struct imx_port_ucrs { From dabfb351db690964f6c5f5729d4f407586f69a4f Mon Sep 17 00:00:00 2001 From: Corbin Date: Wed, 23 May 2012 09:37:31 -0500 Subject: [PATCH 007/235] serial_core: Update buffer overrun statistics. Currently, serial drivers don't report buffer overruns. When a buffer overrun occurs, tty_insert_flip_char returns 0, and no attempt is made to insert that same character again (i.e. it is lost). This patch reports buffer overruns via the buf_overrun field in the port's icount structure. Signed-off-by: Corbin Atkinson Cc: Jiri Slaby Cc: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 246b823c1b2..a21dc8e3b7c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2527,14 +2527,16 @@ void uart_insert_char(struct uart_port *port, unsigned int status, struct tty_struct *tty = port->state->port.tty; if ((status & port->ignore_status_mask & ~overrun) == 0) - tty_insert_flip_char(tty, ch, flag); + if (tty_insert_flip_char(tty, ch, flag) == 0) + ++port->icount.buf_overrun; /* * Overrun is special. Since it's reported immediately, * it doesn't affect the current character. */ if (status & ~port->ignore_status_mask & overrun) - tty_insert_flip_char(tty, 0, TTY_OVERRUN); + if (tty_insert_flip_char(tty, 0, TTY_OVERRUN) == 0) + ++port->icount.buf_overrun; } EXPORT_SYMBOL_GPL(uart_insert_char); From 7a5145965c9807732135630642c49f280b375f56 Mon Sep 17 00:00:00 2001 From: Roland Stigge Date: Mon, 11 Jun 2012 21:57:13 +0200 Subject: [PATCH 008/235] serial/8250: Add LPC3220 standard UART type LPC32xx has "Standard" UARTs that are actually 16550A compatible but have bigger FIFOs. Since the already supported 16X50 line still doesn't match here, we agreed on adding a new type. Signed-off-by: Roland Stigge Acked-by: Alan Cox Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 8 ++++++++ include/linux/serial_core.h | 3 ++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 47d061b9ad4..349d12c5516 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -282,6 +282,14 @@ static const struct serial8250_config uart_config[] = { .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, .flags = UART_CAP_FIFO | UART_CAP_AFE | UART_CAP_EFR, }, + [PORT_LPC3220] = { + .name = "LPC3220", + .fifo_size = 64, + .tx_loadsz = 32, + .fcr = UART_FCR_DMA_SELECT | UART_FCR_ENABLE_FIFO | + UART_FCR_R_TRIG_00 | UART_FCR_T_TRIG_00, + .flags = UART_CAP_FIFO, + }, }; /* Uart divisor latch read */ diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 65db9928e15..0253c2022e5 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -47,7 +47,8 @@ #define PORT_U6_16550A 19 /* ST-Ericsson U6xxx internal UART */ #define PORT_TEGRA 20 /* NVIDIA Tegra internal UART */ #define PORT_XR17D15X 21 /* Exar XR17D15x UART */ -#define PORT_MAX_8250 21 /* max port ID */ +#define PORT_LPC3220 22 /* NXP LPC32xx SoC "Standard" UART */ +#define PORT_MAX_8250 22 /* max port ID */ /* * ARM specific type numbers. These are not currently guaranteed From e4305f0c500cc2b8ca8d6ca2fb74fb76bf2cb6ad Mon Sep 17 00:00:00 2001 From: Roland Stigge Date: Mon, 11 Jun 2012 21:57:14 +0200 Subject: [PATCH 009/235] serial/of-serial: Add LPC3220 standard UART compatible string This patch adds a "compatible" string for the new 8250 UART type PORT_LPC3220. This is necessary for initializing LPC32xx UARTs via DT. Signed-off-by: Roland Stigge Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/tty/serial/of-serial.txt | 1 + drivers/tty/serial/of_serial.c | 1 + 2 files changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt index b8b27b0aca1..0847fdeee11 100644 --- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt @@ -9,6 +9,7 @@ Required properties: - "ns16750" - "ns16850" - "nvidia,tegra20-uart" + - "nxp,lpc3220-uart" - "ibm,qpace-nwp-serial" - "serial" if the port type is unknown. - reg : offset and length of the register set for the device. diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 5410c063726..34e71874a89 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -208,6 +208,7 @@ static struct of_device_id __devinitdata of_platform_serial_table[] = { { .compatible = "ns16750", .data = (void *)PORT_16750, }, { .compatible = "ns16850", .data = (void *)PORT_16850, }, { .compatible = "nvidia,tegra20-uart", .data = (void *)PORT_TEGRA, }, + { .compatible = "nxp,lpc3220-uart", .data = (void *)PORT_LPC3220, }, #ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL { .compatible = "ibm,qpace-nwp-serial", .data = (void *)PORT_NWPSERIAL, }, From 596f93f50e2d1a926bbb6c73aa7ee7fd862b7062 Mon Sep 17 00:00:00 2001 From: Roland Stigge Date: Mon, 11 Jun 2012 22:04:12 +0200 Subject: [PATCH 010/235] serial: Add driver for LPC32xx High Speed UARTs This patch adds a driver for the 3 High Speed UARTs of the LPC32xx SoC that support up to 921600bps. These UARTs are different from the 4 "Standard" UARTs of the LPC32xx. Signed-off-by: Roland Stigge Signed-off-by: Greg Kroah-Hartman --- .../tty/serial/nxp-lpc32xx-hsuart.txt | 14 + drivers/tty/serial/Kconfig | 19 + drivers/tty/serial/Makefile | 1 + drivers/tty/serial/lpc32xx_hs.c | 823 ++++++++++++++++++ 4 files changed, 857 insertions(+) create mode 100644 Documentation/devicetree/bindings/tty/serial/nxp-lpc32xx-hsuart.txt create mode 100644 drivers/tty/serial/lpc32xx_hs.c diff --git a/Documentation/devicetree/bindings/tty/serial/nxp-lpc32xx-hsuart.txt b/Documentation/devicetree/bindings/tty/serial/nxp-lpc32xx-hsuart.txt new file mode 100644 index 00000000000..0d439dfc1aa --- /dev/null +++ b/Documentation/devicetree/bindings/tty/serial/nxp-lpc32xx-hsuart.txt @@ -0,0 +1,14 @@ +* NXP LPC32xx SoC High Speed UART + +Required properties: +- compatible: Should be "nxp,lpc3220-hsuart" +- reg: Should contain registers location and length +- interrupts: Should contain interrupt + +Example: + + uart1: serial@40014000 { + compatible = "nxp,lpc3220-hsuart"; + reg = <0x40014000 0x1000>; + interrupts = <26 0>; + }; diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 070b442c1f8..00207865ec5 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -704,6 +704,25 @@ config SERIAL_PNX8XXX_CONSOLE If you have a MIPS-based Philips SoC such as PNX8550 or PNX8330 and you want to use serial console, say Y. Otherwise, say N. +config SERIAL_HS_LPC32XX + tristate "LPC32XX high speed serial port support" + depends on ARCH_LPC32XX && OF + select SERIAL_CORE + help + Support for the LPC32XX high speed serial ports (up to 900kbps). + Those are UARTs completely different from the Standard UARTs on the + LPC32XX SoC. + Choose M or Y here to build this driver. + +config SERIAL_HS_LPC32XX_CONSOLE + bool "Enable LPC32XX high speed UART serial console" + depends on SERIAL_HS_LPC32XX + select SERIAL_CORE_CONSOLE + help + If you would like to be able to use one of the high speed serial + ports on the LPC32XX as the console, you can do so by answering + Y to this option. + config SERIAL_CORE tristate diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 7257c5d898a..8a5df3804e5 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -34,6 +34,7 @@ obj-$(CONFIG_SERIAL_MUX) += mux.o obj-$(CONFIG_SERIAL_68328) += 68328serial.o obj-$(CONFIG_SERIAL_MCF) += mcf.o obj-$(CONFIG_SERIAL_PMACZILOG) += pmac_zilog.o +obj-$(CONFIG_SERIAL_HS_LPC32XX) += lpc32xx_hs.o obj-$(CONFIG_SERIAL_DZ) += dz.o obj-$(CONFIG_SERIAL_ZS) += zs.o obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o diff --git a/drivers/tty/serial/lpc32xx_hs.c b/drivers/tty/serial/lpc32xx_hs.c new file mode 100644 index 00000000000..ba3af3bf6d4 --- /dev/null +++ b/drivers/tty/serial/lpc32xx_hs.c @@ -0,0 +1,823 @@ +/* + * High Speed Serial Ports on NXP LPC32xx SoC + * + * Authors: Kevin Wells + * Roland Stigge + * + * Copyright (C) 2010 NXP Semiconductors + * Copyright (C) 2012 Roland Stigge + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * High Speed UART register offsets + */ +#define LPC32XX_HSUART_FIFO(x) ((x) + 0x00) +#define LPC32XX_HSUART_LEVEL(x) ((x) + 0x04) +#define LPC32XX_HSUART_IIR(x) ((x) + 0x08) +#define LPC32XX_HSUART_CTRL(x) ((x) + 0x0C) +#define LPC32XX_HSUART_RATE(x) ((x) + 0x10) + +#define LPC32XX_HSU_BREAK_DATA (1 << 10) +#define LPC32XX_HSU_ERROR_DATA (1 << 9) +#define LPC32XX_HSU_RX_EMPTY (1 << 8) + +#define LPC32XX_HSU_TX_LEV(n) (((n) >> 8) & 0xFF) +#define LPC32XX_HSU_RX_LEV(n) ((n) & 0xFF) + +#define LPC32XX_HSU_TX_INT_SET (1 << 6) +#define LPC32XX_HSU_RX_OE_INT (1 << 5) +#define LPC32XX_HSU_BRK_INT (1 << 4) +#define LPC32XX_HSU_FE_INT (1 << 3) +#define LPC32XX_HSU_RX_TIMEOUT_INT (1 << 2) +#define LPC32XX_HSU_RX_TRIG_INT (1 << 1) +#define LPC32XX_HSU_TX_INT (1 << 0) + +#define LPC32XX_HSU_HRTS_INV (1 << 21) +#define LPC32XX_HSU_HRTS_TRIG_8B (0x0 << 19) +#define LPC32XX_HSU_HRTS_TRIG_16B (0x1 << 19) +#define LPC32XX_HSU_HRTS_TRIG_32B (0x2 << 19) +#define LPC32XX_HSU_HRTS_TRIG_48B (0x3 << 19) +#define LPC32XX_HSU_HRTS_EN (1 << 18) +#define LPC32XX_HSU_TMO_DISABLED (0x0 << 16) +#define LPC32XX_HSU_TMO_INACT_4B (0x1 << 16) +#define LPC32XX_HSU_TMO_INACT_8B (0x2 << 16) +#define LPC32XX_HSU_TMO_INACT_16B (0x3 << 16) +#define LPC32XX_HSU_HCTS_INV (1 << 15) +#define LPC32XX_HSU_HCTS_EN (1 << 14) +#define LPC32XX_HSU_OFFSET(n) ((n) << 9) +#define LPC32XX_HSU_BREAK (1 << 8) +#define LPC32XX_HSU_ERR_INT_EN (1 << 7) +#define LPC32XX_HSU_RX_INT_EN (1 << 6) +#define LPC32XX_HSU_TX_INT_EN (1 << 5) +#define LPC32XX_HSU_RX_TL1B (0x0 << 2) +#define LPC32XX_HSU_RX_TL4B (0x1 << 2) +#define LPC32XX_HSU_RX_TL8B (0x2 << 2) +#define LPC32XX_HSU_RX_TL16B (0x3 << 2) +#define LPC32XX_HSU_RX_TL32B (0x4 << 2) +#define LPC32XX_HSU_RX_TL48B (0x5 << 2) +#define LPC32XX_HSU_TX_TLEMPTY (0x0 << 0) +#define LPC32XX_HSU_TX_TL0B (0x0 << 0) +#define LPC32XX_HSU_TX_TL4B (0x1 << 0) +#define LPC32XX_HSU_TX_TL8B (0x2 << 0) +#define LPC32XX_HSU_TX_TL16B (0x3 << 0) + +#define MODNAME "lpc32xx_hsuart" + +struct lpc32xx_hsuart_port { + struct uart_port port; +}; + +#define FIFO_READ_LIMIT 128 +#define MAX_PORTS 3 +#define LPC32XX_TTY_NAME "ttyTX" +static struct lpc32xx_hsuart_port lpc32xx_hs_ports[MAX_PORTS]; + +#ifdef CONFIG_SERIAL_HS_LPC32XX_CONSOLE +static void wait_for_xmit_empty(struct uart_port *port) +{ + unsigned int timeout = 10000; + + do { + if (LPC32XX_HSU_TX_LEV(readl(LPC32XX_HSUART_LEVEL( + port->membase))) == 0) + break; + if (--timeout == 0) + break; + udelay(1); + } while (1); +} + +static void wait_for_xmit_ready(struct uart_port *port) +{ + unsigned int timeout = 10000; + + while (1) { + if (LPC32XX_HSU_TX_LEV(readl(LPC32XX_HSUART_LEVEL( + port->membase))) < 32) + break; + if (--timeout == 0) + break; + udelay(1); + } +} + +static void lpc32xx_hsuart_console_putchar(struct uart_port *port, int ch) +{ + wait_for_xmit_ready(port); + writel((u32)ch, LPC32XX_HSUART_FIFO(port->membase)); +} + +static void lpc32xx_hsuart_console_write(struct console *co, const char *s, + unsigned int count) +{ + struct lpc32xx_hsuart_port *up = &lpc32xx_hs_ports[co->index]; + unsigned long flags; + int locked = 1; + + touch_nmi_watchdog(); + local_irq_save(flags); + if (up->port.sysrq) + locked = 0; + else if (oops_in_progress) + locked = spin_trylock(&up->port.lock); + else + spin_lock(&up->port.lock); + + uart_console_write(&up->port, s, count, lpc32xx_hsuart_console_putchar); + wait_for_xmit_empty(&up->port); + + if (locked) + spin_unlock(&up->port.lock); + local_irq_restore(flags); +} + +static int __init lpc32xx_hsuart_console_setup(struct console *co, + char *options) +{ + struct uart_port *port; + int baud = 115200; + int bits = 8; + int parity = 'n'; + int flow = 'n'; + + if (co->index >= MAX_PORTS) + co->index = 0; + + port = &lpc32xx_hs_ports[co->index].port; + if (!port->membase) + return -ENODEV; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} + +static struct uart_driver lpc32xx_hsuart_reg; +static struct console lpc32xx_hsuart_console = { + .name = LPC32XX_TTY_NAME, + .write = lpc32xx_hsuart_console_write, + .device = uart_console_device, + .setup = lpc32xx_hsuart_console_setup, + .flags = CON_PRINTBUFFER, + .index = -1, + .data = &lpc32xx_hsuart_reg, +}; + +static int __init lpc32xx_hsuart_console_init(void) +{ + register_console(&lpc32xx_hsuart_console); + return 0; +} +console_initcall(lpc32xx_hsuart_console_init); + +#define LPC32XX_HSUART_CONSOLE (&lpc32xx_hsuart_console) +#else +#define LPC32XX_HSUART_CONSOLE NULL +#endif + +static struct uart_driver lpc32xx_hs_reg = { + .owner = THIS_MODULE, + .driver_name = MODNAME, + .dev_name = LPC32XX_TTY_NAME, + .nr = MAX_PORTS, + .cons = LPC32XX_HSUART_CONSOLE, +}; +static int uarts_registered; + +static unsigned int __serial_get_clock_div(unsigned long uartclk, + unsigned long rate) +{ + u32 div, goodrate, hsu_rate, l_hsu_rate, comprate; + u32 rate_diff; + + /* Find the closest divider to get the desired clock rate */ + div = uartclk / rate; + goodrate = hsu_rate = (div / 14) - 1; + if (hsu_rate != 0) + hsu_rate--; + + /* Tweak divider */ + l_hsu_rate = hsu_rate + 3; + rate_diff = 0xFFFFFFFF; + + while (hsu_rate < l_hsu_rate) { + comprate = uartclk / ((hsu_rate + 1) * 14); + if (abs(comprate - rate) < rate_diff) { + goodrate = hsu_rate; + rate_diff = abs(comprate - rate); + } + + hsu_rate++; + } + if (hsu_rate > 0xFF) + hsu_rate = 0xFF; + + return goodrate; +} + +static void __serial_uart_flush(struct uart_port *port) +{ + u32 tmp; + int cnt = 0; + + while ((readl(LPC32XX_HSUART_LEVEL(port->membase)) > 0) && + (cnt++ < FIFO_READ_LIMIT)) + tmp = readl(LPC32XX_HSUART_FIFO(port->membase)); +} + +static void __serial_lpc32xx_rx(struct uart_port *port) +{ + unsigned int tmp, flag; + struct tty_struct *tty = tty_port_tty_get(&port->state->port); + + if (!tty) { + /* Discard data: no tty available */ + while (!(readl(LPC32XX_HSUART_FIFO(port->membase)) & + LPC32XX_HSU_RX_EMPTY)) + ; + + return; + } + + /* Read data from FIFO and push into terminal */ + tmp = readl(LPC32XX_HSUART_FIFO(port->membase)); + while (!(tmp & LPC32XX_HSU_RX_EMPTY)) { + flag = TTY_NORMAL; + port->icount.rx++; + + if (tmp & LPC32XX_HSU_ERROR_DATA) { + /* Framing error */ + writel(LPC32XX_HSU_FE_INT, + LPC32XX_HSUART_IIR(port->membase)); + port->icount.frame++; + flag = TTY_FRAME; + tty_insert_flip_char(tty, 0, TTY_FRAME); + } + + tty_insert_flip_char(tty, (tmp & 0xFF), flag); + + tmp = readl(LPC32XX_HSUART_FIFO(port->membase)); + } + tty_flip_buffer_push(tty); + tty_kref_put(tty); +} + +static void __serial_lpc32xx_tx(struct uart_port *port) +{ + struct circ_buf *xmit = &port->state->xmit; + unsigned int tmp; + + if (port->x_char) { + writel((u32)port->x_char, LPC32XX_HSUART_FIFO(port->membase)); + port->icount.tx++; + port->x_char = 0; + return; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) + goto exit_tx; + + /* Transfer data */ + while (LPC32XX_HSU_TX_LEV(readl( + LPC32XX_HSUART_LEVEL(port->membase))) < 64) { + writel((u32) xmit->buf[xmit->tail], + LPC32XX_HSUART_FIFO(port->membase)); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + if (uart_circ_empty(xmit)) + break; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); + +exit_tx: + if (uart_circ_empty(xmit)) { + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + tmp &= ~LPC32XX_HSU_TX_INT_EN; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + } +} + +static irqreturn_t serial_lpc32xx_interrupt(int irq, void *dev_id) +{ + struct uart_port *port = dev_id; + struct tty_struct *tty = tty_port_tty_get(&port->state->port); + u32 status; + + spin_lock(&port->lock); + + /* Read UART status and clear latched interrupts */ + status = readl(LPC32XX_HSUART_IIR(port->membase)); + + if (status & LPC32XX_HSU_BRK_INT) { + /* Break received */ + writel(LPC32XX_HSU_BRK_INT, LPC32XX_HSUART_IIR(port->membase)); + port->icount.brk++; + uart_handle_break(port); + } + + /* Framing error */ + if (status & LPC32XX_HSU_FE_INT) + writel(LPC32XX_HSU_FE_INT, LPC32XX_HSUART_IIR(port->membase)); + + if (status & LPC32XX_HSU_RX_OE_INT) { + /* Receive FIFO overrun */ + writel(LPC32XX_HSU_RX_OE_INT, + LPC32XX_HSUART_IIR(port->membase)); + port->icount.overrun++; + if (tty) { + tty_insert_flip_char(tty, 0, TTY_OVERRUN); + tty_schedule_flip(tty); + } + } + + /* Data received? */ + if (status & (LPC32XX_HSU_RX_TIMEOUT_INT | LPC32XX_HSU_RX_TRIG_INT)) { + __serial_lpc32xx_rx(port); + if (tty) + tty_flip_buffer_push(tty); + } + + /* Transmit data request? */ + if ((status & LPC32XX_HSU_TX_INT) && (!uart_tx_stopped(port))) { + writel(LPC32XX_HSU_TX_INT, LPC32XX_HSUART_IIR(port->membase)); + __serial_lpc32xx_tx(port); + } + + spin_unlock(&port->lock); + tty_kref_put(tty); + + return IRQ_HANDLED; +} + +/* port->lock is not held. */ +static unsigned int serial_lpc32xx_tx_empty(struct uart_port *port) +{ + unsigned int ret = 0; + + if (LPC32XX_HSU_TX_LEV(readl(LPC32XX_HSUART_LEVEL(port->membase))) == 0) + ret = TIOCSER_TEMT; + + return ret; +} + +/* port->lock held by caller. */ +static void serial_lpc32xx_set_mctrl(struct uart_port *port, + unsigned int mctrl) +{ + /* No signals are supported on HS UARTs */ +} + +/* port->lock is held by caller and interrupts are disabled. */ +static unsigned int serial_lpc32xx_get_mctrl(struct uart_port *port) +{ + /* No signals are supported on HS UARTs */ + return TIOCM_CAR | TIOCM_DSR | TIOCM_CTS; +} + +/* port->lock held by caller. */ +static void serial_lpc32xx_stop_tx(struct uart_port *port) +{ + u32 tmp; + + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + tmp &= ~LPC32XX_HSU_TX_INT_EN; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); +} + +/* port->lock held by caller. */ +static void serial_lpc32xx_start_tx(struct uart_port *port) +{ + u32 tmp; + + __serial_lpc32xx_tx(port); + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + tmp |= LPC32XX_HSU_TX_INT_EN; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); +} + +/* port->lock held by caller. */ +static void serial_lpc32xx_stop_rx(struct uart_port *port) +{ + u32 tmp; + + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + tmp &= ~(LPC32XX_HSU_RX_INT_EN | LPC32XX_HSU_ERR_INT_EN); + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + + writel((LPC32XX_HSU_BRK_INT | LPC32XX_HSU_RX_OE_INT | + LPC32XX_HSU_FE_INT), LPC32XX_HSUART_IIR(port->membase)); +} + +/* port->lock held by caller. */ +static void serial_lpc32xx_enable_ms(struct uart_port *port) +{ + /* Modem status is not supported */ +} + +/* port->lock is not held. */ +static void serial_lpc32xx_break_ctl(struct uart_port *port, + int break_state) +{ + unsigned long flags; + u32 tmp; + + spin_lock_irqsave(&port->lock, flags); + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + if (break_state != 0) + tmp |= LPC32XX_HSU_BREAK; + else + tmp &= ~LPC32XX_HSU_BREAK; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + spin_unlock_irqrestore(&port->lock, flags); +} + +/* LPC3250 Errata HSUART.1: Hang workaround via loopback mode on inactivity */ +static void lpc32xx_loopback_set(resource_size_t mapbase, int state) +{ + int bit; + u32 tmp; + + switch (mapbase) { + case LPC32XX_HS_UART1_BASE: + bit = 0; + break; + case LPC32XX_HS_UART2_BASE: + bit = 1; + break; + case LPC32XX_HS_UART7_BASE: + bit = 6; + break; + default: + WARN(1, "lpc32xx_hs: Warning: Unknown port at %08x\n", mapbase); + return; + } + + tmp = readl(LPC32XX_UARTCTL_CLOOP); + if (state) + tmp |= (1 << bit); + else + tmp &= ~(1 << bit); + writel(tmp, LPC32XX_UARTCTL_CLOOP); +} + +/* port->lock is not held. */ +static int serial_lpc32xx_startup(struct uart_port *port) +{ + int retval; + unsigned long flags; + u32 tmp; + + spin_lock_irqsave(&port->lock, flags); + + __serial_uart_flush(port); + + writel((LPC32XX_HSU_TX_INT | LPC32XX_HSU_FE_INT | + LPC32XX_HSU_BRK_INT | LPC32XX_HSU_RX_OE_INT), + LPC32XX_HSUART_IIR(port->membase)); + + writel(0xFF, LPC32XX_HSUART_RATE(port->membase)); + + /* + * Set receiver timeout, HSU offset of 20, no break, no interrupts, + * and default FIFO trigger levels + */ + tmp = LPC32XX_HSU_TX_TL8B | LPC32XX_HSU_RX_TL32B | + LPC32XX_HSU_OFFSET(20) | LPC32XX_HSU_TMO_INACT_4B; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + + lpc32xx_loopback_set(port->mapbase, 0); /* get out of loopback mode */ + + spin_unlock_irqrestore(&port->lock, flags); + + retval = request_irq(port->irq, serial_lpc32xx_interrupt, + 0, MODNAME, port); + if (!retval) + writel((tmp | LPC32XX_HSU_RX_INT_EN | LPC32XX_HSU_ERR_INT_EN), + LPC32XX_HSUART_CTRL(port->membase)); + + return retval; +} + +/* port->lock is not held. */ +static void serial_lpc32xx_shutdown(struct uart_port *port) +{ + u32 tmp; + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + tmp = LPC32XX_HSU_TX_TL8B | LPC32XX_HSU_RX_TL32B | + LPC32XX_HSU_OFFSET(20) | LPC32XX_HSU_TMO_INACT_4B; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + + lpc32xx_loopback_set(port->mapbase, 1); /* go to loopback mode */ + + spin_unlock_irqrestore(&port->lock, flags); + + free_irq(port->irq, port); +} + +/* port->lock is not held. */ +static void serial_lpc32xx_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + unsigned long flags; + unsigned int baud, quot; + u32 tmp; + + /* Always 8-bit, no parity, 1 stop bit */ + termios->c_cflag &= ~(CSIZE | CSTOPB | PARENB | PARODD); + termios->c_cflag |= CS8; + + termios->c_cflag &= ~(HUPCL | CMSPAR | CLOCAL | CRTSCTS); + + baud = uart_get_baud_rate(port, termios, old, 0, + port->uartclk / 14); + + quot = __serial_get_clock_div(port->uartclk, baud); + + spin_lock_irqsave(&port->lock, flags); + + /* Ignore characters? */ + tmp = readl(LPC32XX_HSUART_CTRL(port->membase)); + if ((termios->c_cflag & CREAD) == 0) + tmp &= ~(LPC32XX_HSU_RX_INT_EN | LPC32XX_HSU_ERR_INT_EN); + else + tmp |= LPC32XX_HSU_RX_INT_EN | LPC32XX_HSU_ERR_INT_EN; + writel(tmp, LPC32XX_HSUART_CTRL(port->membase)); + + writel(quot, LPC32XX_HSUART_RATE(port->membase)); + + uart_update_timeout(port, termios->c_cflag, baud); + + spin_unlock_irqrestore(&port->lock, flags); + + /* Don't rewrite B0 */ + if (tty_termios_baud_rate(termios)) + tty_termios_encode_baud_rate(termios, baud, baud); +} + +static const char *serial_lpc32xx_type(struct uart_port *port) +{ + return MODNAME; +} + +static void serial_lpc32xx_release_port(struct uart_port *port) +{ + if ((port->iotype == UPIO_MEM32) && (port->mapbase)) { + if (port->flags & UPF_IOREMAP) { + iounmap(port->membase); + port->membase = NULL; + } + + release_mem_region(port->mapbase, SZ_4K); + } +} + +static int serial_lpc32xx_request_port(struct uart_port *port) +{ + int ret = -ENODEV; + + if ((port->iotype == UPIO_MEM32) && (port->mapbase)) { + ret = 0; + + if (!request_mem_region(port->mapbase, SZ_4K, MODNAME)) + ret = -EBUSY; + else if (port->flags & UPF_IOREMAP) { + port->membase = ioremap(port->mapbase, SZ_4K); + if (!port->membase) { + release_mem_region(port->mapbase, SZ_4K); + ret = -ENOMEM; + } + } + } + + return ret; +} + +static void serial_lpc32xx_config_port(struct uart_port *port, int uflags) +{ + int ret; + + ret = serial_lpc32xx_request_port(port); + if (ret < 0) + return; + port->type = PORT_UART00; + port->fifosize = 64; + + __serial_uart_flush(port); + + writel((LPC32XX_HSU_TX_INT | LPC32XX_HSU_FE_INT | + LPC32XX_HSU_BRK_INT | LPC32XX_HSU_RX_OE_INT), + LPC32XX_HSUART_IIR(port->membase)); + + writel(0xFF, LPC32XX_HSUART_RATE(port->membase)); + + /* Set receiver timeout, HSU offset of 20, no break, no interrupts, + and default FIFO trigger levels */ + writel(LPC32XX_HSU_TX_TL8B | LPC32XX_HSU_RX_TL32B | + LPC32XX_HSU_OFFSET(20) | LPC32XX_HSU_TMO_INACT_4B, + LPC32XX_HSUART_CTRL(port->membase)); +} + +static int serial_lpc32xx_verify_port(struct uart_port *port, + struct serial_struct *ser) +{ + int ret = 0; + + if (ser->type != PORT_UART00) + ret = -EINVAL; + + return ret; +} + +static struct uart_ops serial_lpc32xx_pops = { + .tx_empty = serial_lpc32xx_tx_empty, + .set_mctrl = serial_lpc32xx_set_mctrl, + .get_mctrl = serial_lpc32xx_get_mctrl, + .stop_tx = serial_lpc32xx_stop_tx, + .start_tx = serial_lpc32xx_start_tx, + .stop_rx = serial_lpc32xx_stop_rx, + .enable_ms = serial_lpc32xx_enable_ms, + .break_ctl = serial_lpc32xx_break_ctl, + .startup = serial_lpc32xx_startup, + .shutdown = serial_lpc32xx_shutdown, + .set_termios = serial_lpc32xx_set_termios, + .type = serial_lpc32xx_type, + .release_port = serial_lpc32xx_release_port, + .request_port = serial_lpc32xx_request_port, + .config_port = serial_lpc32xx_config_port, + .verify_port = serial_lpc32xx_verify_port, +}; + +/* + * Register a set of serial devices attached to a platform device + */ +static int __devinit serial_hs_lpc32xx_probe(struct platform_device *pdev) +{ + struct lpc32xx_hsuart_port *p = &lpc32xx_hs_ports[uarts_registered]; + int ret = 0; + struct resource *res; + + if (uarts_registered >= MAX_PORTS) { + dev_err(&pdev->dev, + "Error: Number of possible ports exceeded (%d)!\n", + uarts_registered + 1); + return -ENXIO; + } + + memset(p, 0, sizeof(*p)); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + dev_err(&pdev->dev, + "Error getting mem resource for HS UART port %d\n", + uarts_registered); + return -ENXIO; + } + p->port.mapbase = res->start; + p->port.membase = NULL; + + p->port.irq = platform_get_irq(pdev, 0); + if (p->port.irq < 0) { + dev_err(&pdev->dev, "Error getting irq for HS UART port %d\n", + uarts_registered); + return p->port.irq; + } + + p->port.iotype = UPIO_MEM32; + p->port.uartclk = LPC32XX_MAIN_OSC_FREQ; + p->port.regshift = 2; + p->port.flags = UPF_BOOT_AUTOCONF | UPF_FIXED_PORT | UPF_IOREMAP; + p->port.dev = &pdev->dev; + p->port.ops = &serial_lpc32xx_pops; + p->port.line = uarts_registered++; + spin_lock_init(&p->port.lock); + + /* send port to loopback mode by default */ + lpc32xx_loopback_set(p->port.mapbase, 1); + + ret = uart_add_one_port(&lpc32xx_hs_reg, &p->port); + + platform_set_drvdata(pdev, p); + + return ret; +} + +/* + * Remove serial ports registered against a platform device. + */ +static int __devexit serial_hs_lpc32xx_remove(struct platform_device *pdev) +{ + struct lpc32xx_hsuart_port *p = platform_get_drvdata(pdev); + + uart_remove_one_port(&lpc32xx_hs_reg, &p->port); + + return 0; +} + + +#ifdef CONFIG_PM +static int serial_hs_lpc32xx_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct lpc32xx_hsuart_port *p = platform_get_drvdata(pdev); + + uart_suspend_port(&lpc32xx_hs_reg, &p->port); + + return 0; +} + +static int serial_hs_lpc32xx_resume(struct platform_device *pdev) +{ + struct lpc32xx_hsuart_port *p = platform_get_drvdata(pdev); + + uart_resume_port(&lpc32xx_hs_reg, &p->port); + + return 0; +} +#else +#define serial_hs_lpc32xx_suspend NULL +#define serial_hs_lpc32xx_resume NULL +#endif + +static const struct of_device_id serial_hs_lpc32xx_dt_ids[] = { + { .compatible = "nxp,lpc3220-hsuart" }, + { /* sentinel */ } +}; + +MODULE_DEVICE_TABLE(of, serial_hs_lpc32xx_dt_ids); + +static struct platform_driver serial_hs_lpc32xx_driver = { + .probe = serial_hs_lpc32xx_probe, + .remove = __devexit_p(serial_hs_lpc32xx_remove), + .suspend = serial_hs_lpc32xx_suspend, + .resume = serial_hs_lpc32xx_resume, + .driver = { + .name = MODNAME, + .owner = THIS_MODULE, + .of_match_table = serial_hs_lpc32xx_dt_ids, + }, +}; + +static int __init lpc32xx_hsuart_init(void) +{ + int ret; + + ret = uart_register_driver(&lpc32xx_hs_reg); + if (ret) + return ret; + + ret = platform_driver_register(&serial_hs_lpc32xx_driver); + if (ret) + uart_unregister_driver(&lpc32xx_hs_reg); + + return ret; +} + +static void __exit lpc32xx_hsuart_exit(void) +{ + platform_driver_unregister(&serial_hs_lpc32xx_driver); + uart_unregister_driver(&lpc32xx_hs_reg); +} + +module_init(lpc32xx_hsuart_init); +module_exit(lpc32xx_hsuart_exit); + +MODULE_AUTHOR("Kevin Wells "); +MODULE_AUTHOR("Roland Stigge "); +MODULE_DESCRIPTION("NXP LPC32XX High Speed UART driver"); +MODULE_LICENSE("GPL"); From ee4cd1b225368abed7e0f4d344f1e9a93e87b98e Mon Sep 17 00:00:00 2001 From: Shawn Bohrer Date: Mon, 28 May 2012 15:20:47 -0500 Subject: [PATCH 011/235] 8250_pci: Remove duplicate struct pciserial_board pbn_exsys_4055 is the same thing as pbn_b2_4_115200 so replace it with the standard pattern. Signed-off-by: Shawn Bohrer Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 28e7c7cce89..66e5909d0a1 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1887,7 +1887,6 @@ enum pci_board_num_t { pbn_panacom, pbn_panacom2, pbn_panacom4, - pbn_exsys_4055, pbn_plx_romulus, pbn_oxsemi, pbn_oxsemi_1_4000000, @@ -2393,13 +2392,6 @@ static struct pciserial_board pci_boards[] __devinitdata = { .reg_shift = 7, }, - [pbn_exsys_4055] = { - .flags = FL_BASE2, - .num_ports = 4, - .base_baud = 115200, - .uart_offset = 8, - }, - /* I think this entry is broken - the first_offset looks wrong --rmk */ [pbn_plx_romulus] = { .flags = FL_BASE2, @@ -3193,7 +3185,7 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050, PCI_SUBVENDOR_ID_EXSYS, PCI_SUBDEVICE_ID_EXSYS_4055, 0, 0, - pbn_exsys_4055 }, + pbn_b2_4_115200 }, /* * Megawolf Romulus PCI Serial Card, from Mike Hudson * (Exoray@isys.ca) From 718c4ca1f721be3ae67f9ff7d43b9a910e4a1ec3 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:15 +0200 Subject: [PATCH 012/235] TTY: cyclades, add local pointer for card cy_pci_probe and cy_detect_isa reference cy_card[card_no] many times. It makes the code hard to read. Let us add a local variable holding a pointer to the card indexed by card_no and use that. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/cyclades.c | 63 ++++++++++++++++++++++-------------------- 1 file changed, 33 insertions(+), 30 deletions(-) diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index e61cabdd69d..cff546839db 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -3289,6 +3289,7 @@ static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr, static int __init cy_detect_isa(void) { #ifdef CONFIG_ISA + struct cyclades_card *card; unsigned short cy_isa_irq, nboard; void __iomem *cy_isa_address; unsigned short i, j, cy_isa_nchan; @@ -3349,7 +3350,8 @@ static int __init cy_detect_isa(void) } /* fill the next cy_card structure available */ for (j = 0; j < NR_CARDS; j++) { - if (cy_card[j].base_addr == NULL) + card = &cy_card[j]; + if (card->base_addr == NULL) break; } if (j == NR_CARDS) { /* no more cy_cards available */ @@ -3363,7 +3365,7 @@ static int __init cy_detect_isa(void) /* allocate IRQ */ if (request_irq(cy_isa_irq, cyy_interrupt, - 0, "Cyclom-Y", &cy_card[j])) { + 0, "Cyclom-Y", card)) { printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but " "could not allocate IRQ#%d.\n", (unsigned long)cy_isa_address, cy_isa_irq); @@ -3372,16 +3374,16 @@ static int __init cy_detect_isa(void) } /* set cy_card */ - cy_card[j].base_addr = cy_isa_address; - cy_card[j].ctl_addr.p9050 = NULL; - cy_card[j].irq = (int)cy_isa_irq; - cy_card[j].bus_index = 0; - cy_card[j].first_line = cy_next_channel; - cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP; - cy_card[j].nports = cy_isa_nchan; - if (cy_init_card(&cy_card[j])) { - cy_card[j].base_addr = NULL; - free_irq(cy_isa_irq, &cy_card[j]); + card->base_addr = cy_isa_address; + card->ctl_addr.p9050 = NULL; + card->irq = (int)cy_isa_irq; + card->bus_index = 0; + card->first_line = cy_next_channel; + card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP; + card->nports = cy_isa_nchan; + if (cy_init_card(card)) { + card->base_addr = NULL; + free_irq(cy_isa_irq, card); iounmap(cy_isa_address); continue; } @@ -3695,6 +3697,7 @@ err: static int __devinit cy_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { + struct cyclades_card *card; void __iomem *addr0 = NULL, *addr2 = NULL; char *card_name = NULL; u32 uninitialized_var(mailbox); @@ -3829,7 +3832,8 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, } /* fill the next cy_card structure available */ for (card_no = 0; card_no < NR_CARDS; card_no++) { - if (cy_card[card_no].base_addr == NULL) + card = &cy_card[card_no]; + if (card->base_addr == NULL) break; } if (card_no == NR_CARDS) { /* no more cy_cards available */ @@ -3843,27 +3847,26 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { /* allocate IRQ */ retval = request_irq(irq, cyy_interrupt, - IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]); + IRQF_SHARED, "Cyclom-Y", card); if (retval) { dev_err(&pdev->dev, "could not allocate IRQ\n"); goto err_unmap; } - cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP; + card->num_chips = nchan / CyPORTS_PER_CHIP; } else { struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS; struct ZFW_CTRL __iomem *zfw_ctrl; zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff); - cy_card[card_no].hw_ver = mailbox; - cy_card[card_no].num_chips = (unsigned int)-1; - cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl; + card->hw_ver = mailbox; + card->num_chips = (unsigned int)-1; + card->board_ctrl = &zfw_ctrl->board_ctrl; #ifdef CONFIG_CYZ_INTR /* allocate IRQ only if board has an IRQ */ if (irq != 0 && irq != 255) { retval = request_irq(irq, cyz_interrupt, - IRQF_SHARED, "Cyclades-Z", - &cy_card[card_no]); + IRQF_SHARED, "Cyclades-Z", card); if (retval) { dev_err(&pdev->dev, "could not allocate IRQ\n"); goto err_unmap; @@ -3873,17 +3876,17 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, } /* set cy_card */ - cy_card[card_no].base_addr = addr2; - cy_card[card_no].ctl_addr.p9050 = addr0; - cy_card[card_no].irq = irq; - cy_card[card_no].bus_index = 1; - cy_card[card_no].first_line = cy_next_channel; - cy_card[card_no].nports = nchan; - retval = cy_init_card(&cy_card[card_no]); + card->base_addr = addr2; + card->ctl_addr.p9050 = addr0; + card->irq = irq; + card->bus_index = 1; + card->first_line = cy_next_channel; + card->nports = nchan; + retval = cy_init_card(card); if (retval) goto err_null; - pci_set_drvdata(pdev, &cy_card[card_no]); + pci_set_drvdata(pdev, card); if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo || device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) { @@ -3915,8 +3918,8 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, return 0; err_null: - cy_card[card_no].base_addr = NULL; - free_irq(irq, &cy_card[card_no]); + card->base_addr = NULL; + free_irq(irq, card); err_unmap: iounmap(addr0); if (addr2) From a3cc9fcff84c4c8aaecda2420acd89a1418d57e9 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:16 +0200 Subject: [PATCH 013/235] TTY: ircomm, add tty_port And use close/open_wait from there. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 3 +-- net/irda/ircomm/ircomm_tty.c | 21 +++++++++++---------- net/irda/ircomm/ircomm_tty_attach.c | 2 +- 3 files changed, 13 insertions(+), 13 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index 59ba38bc400..365fa6ec529 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -62,6 +62,7 @@ */ struct ircomm_tty_cb { irda_queue_t queue; /* Must be first */ + struct tty_port port; magic_t magic; int state; /* Connect state */ @@ -97,8 +98,6 @@ struct ircomm_tty_cb { void *skey; void *ckey; - wait_queue_head_t open_wait; - wait_queue_head_t close_wait; struct timer_list watchdog_timer; struct work_struct tqueue; diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 6b9d5a0e42f..8eeaa8b7f4a 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -278,7 +278,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, */ retval = 0; - add_wait_queue(&self->open_wait, &wait); + add_wait_queue(&self->port.open_wait, &wait); IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n", __FILE__,__LINE__, tty->driver->name, self->open_count ); @@ -336,7 +336,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, } __set_current_state(TASK_RUNNING); - remove_wait_queue(&self->open_wait, &wait); + remove_wait_queue(&self->port.open_wait, &wait); if (extra_count) { /* ++ is not atomic, so this should be protected - Jean II */ @@ -381,6 +381,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) return -ENOMEM; } + tty_port_init(&self->port); self->magic = IRCOMM_TTY_MAGIC; self->flow = FLOW_STOP; @@ -393,8 +394,6 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) /* Init some important stuff */ init_timer(&self->watchdog_timer); - init_waitqueue_head(&self->open_wait); - init_waitqueue_head(&self->close_wait); spin_lock_init(&self->spinlock); /* @@ -408,6 +407,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) tty->termios->c_oflag = 0; /* Insert into hash */ + /* FIXME there is a window from find to here */ hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL); } /* ++ is not atomic, so this should be protected - Jean II */ @@ -438,7 +438,8 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) * probably better sleep uninterruptible? */ - if (wait_event_interruptible(self->close_wait, !test_bit(ASYNC_B_CLOSING, &self->flags))) { + if (wait_event_interruptible(self->port.close_wait, + !test_bit(ASYNC_B_CLOSING, &self->flags))) { IRDA_WARNING("%s - got signal while blocking on ASYNC_CLOSING!\n", __func__); return -ERESTARTSYS; @@ -559,11 +560,11 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) if (self->blocked_open) { if (self->close_delay) schedule_timeout_interruptible(self->close_delay); - wake_up_interruptible(&self->open_wait); + wake_up_interruptible(&self->port.open_wait); } self->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - wake_up_interruptible(&self->close_wait); + wake_up_interruptible(&self->port.close_wait); } /* @@ -1011,7 +1012,7 @@ static void ircomm_tty_hangup(struct tty_struct *tty) self->open_count = 0; spin_unlock_irqrestore(&self->spinlock, flags); - wake_up_interruptible(&self->open_wait); + wake_up_interruptible(&self->port.open_wait); } /* @@ -1084,7 +1085,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) (status & IRCOMM_CD) ? "on" : "off"); if (status & IRCOMM_CD) { - wake_up_interruptible(&self->open_wait); + wake_up_interruptible(&self->port.open_wait); } else { IRDA_DEBUG(2, "%s(), Doing serial hangup..\n", __func__ ); @@ -1103,7 +1104,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) tty->hw_stopped = 0; /* Wake up processes blocked on open */ - wake_up_interruptible(&self->open_wait); + wake_up_interruptible(&self->port.open_wait); schedule_work(&self->tqueue); return; diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c index b65d66e0d81..bb1e9356bb1 100644 --- a/net/irda/ircomm/ircomm_tty_attach.c +++ b/net/irda/ircomm/ircomm_tty_attach.c @@ -575,7 +575,7 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self) self->tty->hw_stopped = 0; /* Wake up processes blocked on open */ - wake_up_interruptible(&self->open_wait); + wake_up_interruptible(&self->port.open_wait); } schedule_work(&self->tqueue); From 2a0213cb1e1ca6b2838595b0d70f09ecc4953ba9 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:17 +0200 Subject: [PATCH 014/235] TTY: ircomm, use close times from tty_port Switch to tty_port->close_delay and closing_wait. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 3 --- net/irda/ircomm/ircomm_tty.c | 10 ++++------ net/irda/ircomm/ircomm_tty_ioctl.c | 4 ++-- 3 files changed, 6 insertions(+), 11 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index 365fa6ec529..b4184d089cc 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -101,9 +101,6 @@ struct ircomm_tty_cb { struct timer_list watchdog_timer; struct work_struct tqueue; - unsigned short close_delay; - unsigned short closing_wait; /* time to wait before closing */ - int open_count; int blocked_open; /* # of blocked opens */ diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 8eeaa8b7f4a..61e0adcab96 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -389,8 +389,6 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) INIT_WORK(&self->tqueue, ircomm_tty_do_softint); self->max_header_size = IRCOMM_TTY_HDR_UNINITIALISED; self->max_data_size = IRCOMM_TTY_DATA_UNINITIALISED; - self->close_delay = 5*HZ/10; - self->closing_wait = 30*HZ; /* Init some important stuff */ init_timer(&self->watchdog_timer); @@ -546,8 +544,8 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) * the line discipline to only process XON/XOFF characters. */ tty->closing = 1; - if (self->closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent_from_close(tty, self->closing_wait); + if (self->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) + tty_wait_until_sent_from_close(tty, self->port.closing_wait); ircomm_tty_shutdown(self); @@ -558,8 +556,8 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) self->tty = NULL; if (self->blocked_open) { - if (self->close_delay) - schedule_timeout_interruptible(self->close_delay); + if (self->port.close_delay) + schedule_timeout_interruptible(self->port.close_delay); wake_up_interruptible(&self->port.open_wait); } diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c index d0667d68351..a6d25e37b6b 100644 --- a/net/irda/ircomm/ircomm_tty_ioctl.c +++ b/net/irda/ircomm/ircomm_tty_ioctl.c @@ -272,8 +272,8 @@ static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self, info.line = self->line; info.flags = self->flags; info.baud_base = self->settings.data_rate; - info.close_delay = self->close_delay; - info.closing_wait = self->closing_wait; + info.close_delay = self->port.close_delay; + info.closing_wait = self->port.closing_wait; /* For compatibility */ info.type = PORT_16550A; From 580d27b449cb8f540bba1cc54066bb44f4e6242d Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:18 +0200 Subject: [PATCH 015/235] TTY: ircomm, use open counts from tty_port Switch to tty_port->count and blocked_open. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 3 --- net/irda/ircomm/ircomm_tty.c | 42 +++++++++++++++++------------------ 2 files changed, 21 insertions(+), 24 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index b4184d089cc..5e94bad9262 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -101,9 +101,6 @@ struct ircomm_tty_cb { struct timer_list watchdog_timer; struct work_struct tqueue; - int open_count; - int blocked_open; /* # of blocked opens */ - /* Protect concurent access to : * o self->open_count * o self->ctrl_skb diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 61e0adcab96..787578f9f31 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -272,7 +272,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, self->open_count is dropped by one, so that + * this loop, self->port.count is dropped by one, so that * mgsl_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ @@ -281,16 +281,16 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, add_wait_queue(&self->port.open_wait, &wait); IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n", - __FILE__,__LINE__, tty->driver->name, self->open_count ); + __FILE__, __LINE__, tty->driver->name, self->port.count); - /* As far as I can see, we protect open_count - Jean II */ + /* As far as I can see, we protect port.count - Jean II */ spin_lock_irqsave(&self->spinlock, flags); if (!tty_hung_up_p(filp)) { extra_count = 1; - self->open_count--; + self->port.count--; } spin_unlock_irqrestore(&self->spinlock, flags); - self->blocked_open++; + self->port.blocked_open++; while (1) { if (tty->termios->c_cflag & CBAUD) { @@ -330,7 +330,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, } IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n", - __FILE__,__LINE__, tty->driver->name, self->open_count ); + __FILE__, __LINE__, tty->driver->name, self->port.count); schedule(); } @@ -341,13 +341,13 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, if (extra_count) { /* ++ is not atomic, so this should be protected - Jean II */ spin_lock_irqsave(&self->spinlock, flags); - self->open_count++; + self->port.count++; spin_unlock_irqrestore(&self->spinlock, flags); } - self->blocked_open--; + self->port.blocked_open--; IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n", - __FILE__,__LINE__, tty->driver->name, self->open_count); + __FILE__, __LINE__, tty->driver->name, self->port.count); if (!retval) self->flags |= ASYNC_NORMAL_ACTIVE; @@ -410,14 +410,14 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) } /* ++ is not atomic, so this should be protected - Jean II */ spin_lock_irqsave(&self->spinlock, flags); - self->open_count++; + self->port.count++; tty->driver_data = self; self->tty = tty; spin_unlock_irqrestore(&self->spinlock, flags); IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __func__ , tty->driver->name, - self->line, self->open_count); + self->line, self->port.count); /* Not really used by us, but lets do it anyway */ self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0; @@ -504,7 +504,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) return; } - if ((tty->count == 1) && (self->open_count != 1)) { + if ((tty->count == 1) && (self->port.count != 1)) { /* * Uh, oh. tty->count is 1, which means that the tty * structure will be freed. state->count should always @@ -514,16 +514,16 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) */ IRDA_DEBUG(0, "%s(), bad serial port count; " "tty->count is 1, state->count is %d\n", __func__ , - self->open_count); - self->open_count = 1; + self->port.count); + self->port.count = 1; } - if (--self->open_count < 0) { + if (--self->port.count < 0) { IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n", - __func__, self->line, self->open_count); - self->open_count = 0; + __func__, self->line, self->port.count); + self->port.count = 0; } - if (self->open_count) { + if (self->port.count) { spin_unlock_irqrestore(&self->spinlock, flags); IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ ); @@ -555,7 +555,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) tty->closing = 0; self->tty = NULL; - if (self->blocked_open) { + if (self->port.blocked_open) { if (self->port.close_delay) schedule_timeout_interruptible(self->port.close_delay); wake_up_interruptible(&self->port.open_wait); @@ -1007,7 +1007,7 @@ static void ircomm_tty_hangup(struct tty_struct *tty) spin_lock_irqsave(&self->spinlock, flags); self->flags &= ~ASYNC_NORMAL_ACTIVE; self->tty = NULL; - self->open_count = 0; + self->port.count = 0; spin_unlock_irqrestore(&self->spinlock, flags); wake_up_interruptible(&self->port.open_wait); @@ -1354,7 +1354,7 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m) seq_putc(m, '\n'); seq_printf(m, "Role: %s\n", self->client ? "client" : "server"); - seq_printf(m, "Open count: %d\n", self->open_count); + seq_printf(m, "Open count: %d\n", self->port.count); seq_printf(m, "Max data size: %d\n", self->max_data_size); seq_printf(m, "Max header size: %d\n", self->max_header_size); From 849d5a997fe6a9e44401daed62a98121390ec0d3 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:19 +0200 Subject: [PATCH 016/235] TTY: ircomm, use flags from tty_port Switch to tty_port->flags. And while at it, remove redefined flags for them. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 6 ---- net/irda/ircomm/ircomm_tty.c | 46 ++++++++++++++--------------- net/irda/ircomm/ircomm_tty_attach.c | 5 ++-- net/irda/ircomm/ircomm_tty_ioctl.c | 10 +++---- 4 files changed, 31 insertions(+), 36 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index 5e94bad9262..e4db3b5f6e4 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -52,11 +52,6 @@ /* Same for payload size. See qos.c for the smallest max data size */ #define IRCOMM_TTY_DATA_UNINITIALISED (64 - IRCOMM_TTY_HDR_UNINITIALISED) -/* Those are really defined in include/linux/serial.h - Jean II */ -#define ASYNC_B_INITIALIZED 31 /* Serial port was initialized */ -#define ASYNC_B_NORMAL_ACTIVE 29 /* Normal device is active */ -#define ASYNC_B_CLOSING 27 /* Serial port is closing */ - /* * IrCOMM TTY driver state */ @@ -81,7 +76,6 @@ struct ircomm_tty_cb { LOCAL_FLOW flow; /* IrTTP flow status */ int line; - unsigned long flags; __u8 dlsap_sel; __u8 slsap_sel; diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 787578f9f31..8e61026b9dd 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -194,7 +194,7 @@ static int ircomm_tty_startup(struct ircomm_tty_cb *self) IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); /* Check if already open */ - if (test_and_set_bit(ASYNC_B_INITIALIZED, &self->flags)) { + if (test_and_set_bit(ASYNCB_INITIALIZED, &self->port.flags)) { IRDA_DEBUG(2, "%s(), already open so break out!\n", __func__ ); return 0; } @@ -231,7 +231,7 @@ static int ircomm_tty_startup(struct ircomm_tty_cb *self) return 0; err: - clear_bit(ASYNC_B_INITIALIZED, &self->flags); + clear_bit(ASYNCB_INITIALIZED, &self->port.flags); return ret; } @@ -260,7 +260,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, */ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ - self->flags |= ASYNC_NORMAL_ACTIVE; + self->port.flags |= ASYNC_NORMAL_ACTIVE; IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ ); return 0; } @@ -306,8 +306,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, current->state = TASK_INTERRUPTIBLE; if (tty_hung_up_p(filp) || - !test_bit(ASYNC_B_INITIALIZED, &self->flags)) { - retval = (self->flags & ASYNC_HUP_NOTIFY) ? + !test_bit(ASYNCB_INITIALIZED, &self->port.flags)) { + retval = (self->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } @@ -317,7 +317,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, * specified, we cannot return before the IrCOMM link is * ready */ - if (!test_bit(ASYNC_B_CLOSING, &self->flags) && + if (!test_bit(ASYNCB_CLOSING, &self->port.flags) && (do_clocal || (self->settings.dce & IRCOMM_CD)) && self->state == IRCOMM_TTY_READY) { @@ -350,7 +350,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, __FILE__, __LINE__, tty->driver->name, self->port.count); if (!retval) - self->flags |= ASYNC_NORMAL_ACTIVE; + self->port.flags |= ASYNC_NORMAL_ACTIVE; return retval; } @@ -420,13 +420,13 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) self->line, self->port.count); /* Not really used by us, but lets do it anyway */ - self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0; + tty->low_latency = (self->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0; /* * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || - test_bit(ASYNC_B_CLOSING, &self->flags)) { + test_bit(ASYNCB_CLOSING, &self->port.flags)) { /* Hm, why are we blocking on ASYNC_CLOSING if we * do return -EAGAIN/-ERESTARTSYS below anyway? @@ -437,14 +437,14 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) */ if (wait_event_interruptible(self->port.close_wait, - !test_bit(ASYNC_B_CLOSING, &self->flags))) { + !test_bit(ASYNCB_CLOSING, &self->port.flags))) { IRDA_WARNING("%s - got signal while blocking on ASYNC_CLOSING!\n", __func__); return -ERESTARTSYS; } #ifdef SERIAL_DO_RESTART - return (self->flags & ASYNC_HUP_NOTIFY) ? + return (self->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; #else return -EAGAIN; @@ -531,7 +531,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) } /* Hum... Should be test_and_set_bit ??? - Jean II */ - set_bit(ASYNC_B_CLOSING, &self->flags); + set_bit(ASYNCB_CLOSING, &self->port.flags); /* We need to unlock here (we were unlocking at the end of this * function), because tty_wait_until_sent() may schedule. @@ -561,7 +561,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) wake_up_interruptible(&self->port.open_wait); } - self->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + self->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); wake_up_interruptible(&self->port.close_wait); } @@ -954,7 +954,7 @@ static void ircomm_tty_shutdown(struct ircomm_tty_cb *self) IRDA_DEBUG(0, "%s()\n", __func__ ); - if (!test_and_clear_bit(ASYNC_B_INITIALIZED, &self->flags)) + if (!test_and_clear_bit(ASYNCB_INITIALIZED, &self->port.flags)) return; ircomm_tty_detach_cable(self); @@ -1005,7 +1005,7 @@ static void ircomm_tty_hangup(struct tty_struct *tty) /* I guess we need to lock here - Jean II */ spin_lock_irqsave(&self->spinlock, flags); - self->flags &= ~ASYNC_NORMAL_ACTIVE; + self->port.flags &= ~ASYNC_NORMAL_ACTIVE; self->tty = NULL; self->port.count = 0; spin_unlock_irqrestore(&self->spinlock, flags); @@ -1077,7 +1077,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) if (status & IRCOMM_DCE_DELTA_ANY) { /*wake_up_interruptible(&self->delta_msr_wait);*/ } - if ((self->flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) { + if ((self->port.flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) { IRDA_DEBUG(2, "%s(), ircomm%d CD now %s...\n", __func__ , self->line, (status & IRCOMM_CD) ? "on" : "off"); @@ -1094,7 +1094,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) return; } } - if (self->flags & ASYNC_CTS_FLOW) { + if (self->port.flags & ASYNC_CTS_FLOW) { if (tty->hw_stopped) { if (status & IRCOMM_CTS) { IRDA_DEBUG(2, @@ -1327,27 +1327,27 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m) seq_puts(m, "Flags:"); sep = ' '; - if (self->flags & ASYNC_CTS_FLOW) { + if (self->port.flags & ASYNC_CTS_FLOW) { seq_printf(m, "%cASYNC_CTS_FLOW", sep); sep = '|'; } - if (self->flags & ASYNC_CHECK_CD) { + if (self->port.flags & ASYNC_CHECK_CD) { seq_printf(m, "%cASYNC_CHECK_CD", sep); sep = '|'; } - if (self->flags & ASYNC_INITIALIZED) { + if (self->port.flags & ASYNC_INITIALIZED) { seq_printf(m, "%cASYNC_INITIALIZED", sep); sep = '|'; } - if (self->flags & ASYNC_LOW_LATENCY) { + if (self->port.flags & ASYNC_LOW_LATENCY) { seq_printf(m, "%cASYNC_LOW_LATENCY", sep); sep = '|'; } - if (self->flags & ASYNC_CLOSING) { + if (self->port.flags & ASYNC_CLOSING) { seq_printf(m, "%cASYNC_CLOSING", sep); sep = '|'; } - if (self->flags & ASYNC_NORMAL_ACTIVE) { + if (self->port.flags & ASYNC_NORMAL_ACTIVE) { seq_printf(m, "%cASYNC_NORMAL_ACTIVE", sep); sep = '|'; } diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c index bb1e9356bb1..bed311af731 100644 --- a/net/irda/ircomm/ircomm_tty_attach.c +++ b/net/irda/ircomm/ircomm_tty_attach.c @@ -566,7 +566,8 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self) * will have to wait for the peer device (DCE) to raise the CTS * line. */ - if ((self->flags & ASYNC_CTS_FLOW) && ((self->settings.dce & IRCOMM_CTS) == 0)) { + if ((self->port.flags & ASYNC_CTS_FLOW) && + ((self->settings.dce & IRCOMM_CTS) == 0)) { IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ ); return; } else { @@ -977,7 +978,7 @@ static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, ircomm_tty_next_state(self, IRCOMM_TTY_SEARCH); ircomm_tty_start_watchdog_timer(self, 3*HZ); - if (self->flags & ASYNC_CHECK_CD) { + if (self->port.flags & ASYNC_CHECK_CD) { /* Drop carrier */ self->settings.dce = IRCOMM_DELTA_CD; ircomm_tty_check_modem_status(self); diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c index a6d25e37b6b..31b917e9c8d 100644 --- a/net/irda/ircomm/ircomm_tty_ioctl.c +++ b/net/irda/ircomm/ircomm_tty_ioctl.c @@ -90,19 +90,19 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self) /* CTS flow control flag and modem status interrupts */ if (cflag & CRTSCTS) { - self->flags |= ASYNC_CTS_FLOW; + self->port.flags |= ASYNC_CTS_FLOW; self->settings.flow_control |= IRCOMM_RTS_CTS_IN; /* This got me. Bummer. Jean II */ if (self->service_type == IRCOMM_3_WIRE_RAW) IRDA_WARNING("%s(), enabling RTS/CTS on link that doesn't support it (3-wire-raw)\n", __func__); } else { - self->flags &= ~ASYNC_CTS_FLOW; + self->port.flags &= ~ASYNC_CTS_FLOW; self->settings.flow_control &= ~IRCOMM_RTS_CTS_IN; } if (cflag & CLOCAL) - self->flags &= ~ASYNC_CHECK_CD; + self->port.flags &= ~ASYNC_CHECK_CD; else - self->flags |= ASYNC_CHECK_CD; + self->port.flags |= ASYNC_CHECK_CD; #if 0 /* * Set up parity check flag @@ -270,7 +270,7 @@ static int ircomm_tty_get_serial_info(struct ircomm_tty_cb *self, memset(&info, 0, sizeof(info)); info.line = self->line; - info.flags = self->flags; + info.flags = self->port.flags; info.baud_base = self->settings.data_rate; info.close_delay = self->port.close_delay; info.closing_wait = self->port.closing_wait; From e673927d8a210ab1db27047080fc1bdb47f7e372 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:20 +0200 Subject: [PATCH 017/235] TTY: ircomm, revamp locking Use self->spinlock only for ctrl_skb and tx_skb. TTY stuff is now protected by tty_port->lock. This is needed for further cleanup (and conversion to tty_port helpers). This also closes the race in the end of close. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 1 - net/irda/ircomm/ircomm_tty.c | 38 +++++++++++++++++------------------ 2 files changed, 18 insertions(+), 21 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index e4db3b5f6e4..a9027d8f670 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -96,7 +96,6 @@ struct ircomm_tty_cb { struct work_struct tqueue; /* Protect concurent access to : - * o self->open_count * o self->ctrl_skb * o self->tx_skb * Maybe other things may gain to be protected as well... diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 8e61026b9dd..7b2152cfd42 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -283,13 +283,12 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n", __FILE__, __LINE__, tty->driver->name, self->port.count); - /* As far as I can see, we protect port.count - Jean II */ - spin_lock_irqsave(&self->spinlock, flags); + spin_lock_irqsave(&self->port.lock, flags); if (!tty_hung_up_p(filp)) { extra_count = 1; self->port.count--; } - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); self->port.blocked_open++; while (1) { @@ -340,9 +339,9 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, if (extra_count) { /* ++ is not atomic, so this should be protected - Jean II */ - spin_lock_irqsave(&self->spinlock, flags); + spin_lock_irqsave(&self->port.lock, flags); self->port.count++; - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); } self->port.blocked_open--; @@ -409,12 +408,12 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL); } /* ++ is not atomic, so this should be protected - Jean II */ - spin_lock_irqsave(&self->spinlock, flags); + spin_lock_irqsave(&self->port.lock, flags); self->port.count++; tty->driver_data = self; self->tty = tty; - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __func__ , tty->driver->name, self->line, self->port.count); @@ -495,10 +494,10 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - spin_lock_irqsave(&self->spinlock, flags); + spin_lock_irqsave(&self->port.lock, flags); if (tty_hung_up_p(filp)) { - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); IRDA_DEBUG(0, "%s(), returning 1\n", __func__ ); return; @@ -524,20 +523,15 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) self->port.count = 0; } if (self->port.count) { - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ ); return; } - /* Hum... Should be test_and_set_bit ??? - Jean II */ set_bit(ASYNCB_CLOSING, &self->port.flags); - /* We need to unlock here (we were unlocking at the end of this - * function), because tty_wait_until_sent() may schedule. - * I don't know if the rest should be protected somehow, - * so someone should check. - Jean II */ - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); /* * Now we wait for the transmit buffer to clear; and we notify @@ -552,16 +546,21 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) tty_driver_flush_buffer(tty); tty_ldisc_flush(tty); + spin_lock_irqsave(&self->port.lock, flags); tty->closing = 0; self->tty = NULL; if (self->port.blocked_open) { - if (self->port.close_delay) + if (self->port.close_delay) { + spin_unlock_irqrestore(&self->port.lock, flags); schedule_timeout_interruptible(self->port.close_delay); + spin_lock_irqsave(&self->port.lock, flags); + } wake_up_interruptible(&self->port.open_wait); } self->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + spin_unlock_irqrestore(&self->port.lock, flags); wake_up_interruptible(&self->port.close_wait); } @@ -1003,12 +1002,11 @@ static void ircomm_tty_hangup(struct tty_struct *tty) /* ircomm_tty_flush_buffer(tty); */ ircomm_tty_shutdown(self); - /* I guess we need to lock here - Jean II */ - spin_lock_irqsave(&self->spinlock, flags); + spin_lock_irqsave(&self->port.lock, flags); self->port.flags &= ~ASYNC_NORMAL_ACTIVE; self->tty = NULL; self->port.count = 0; - spin_unlock_irqrestore(&self->spinlock, flags); + spin_unlock_irqrestore(&self->port.lock, flags); wake_up_interruptible(&self->port.open_wait); } From 62f228acb807c370c3b1583bf0f1aa4ab8e19aca Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:21 +0200 Subject: [PATCH 018/235] TTY: ircomm, use tty from tty_port This also includes a switch to tty refcounting. It makes sure, the code no longer can access a freed TTY struct. Sometimes the only thing needed is to pass tty down to the callies. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- include/net/irda/ircomm_tty.h | 1 - net/irda/ircomm/ircomm_param.c | 5 --- net/irda/ircomm/ircomm_tty.c | 62 ++++++++++++++++++----------- net/irda/ircomm/ircomm_tty_attach.c | 33 +++++++++++---- net/irda/ircomm/ircomm_tty_ioctl.c | 11 ++--- 5 files changed, 70 insertions(+), 42 deletions(-) diff --git a/include/net/irda/ircomm_tty.h b/include/net/irda/ircomm_tty.h index a9027d8f670..80ffde3bb16 100644 --- a/include/net/irda/ircomm_tty.h +++ b/include/net/irda/ircomm_tty.h @@ -62,7 +62,6 @@ struct ircomm_tty_cb { int state; /* Connect state */ - struct tty_struct *tty; struct ircomm_cb *ircomm; /* IrCOMM layer instance */ struct sk_buff *tx_skb; /* Transmit buffer */ diff --git a/net/irda/ircomm/ircomm_param.c b/net/irda/ircomm/ircomm_param.c index 8b915f3ac3b..30893912835 100644 --- a/net/irda/ircomm/ircomm_param.c +++ b/net/irda/ircomm/ircomm_param.c @@ -99,7 +99,6 @@ pi_param_info_t ircomm_param_info = { pi_major_call_table, 3, 0x0f, 4 }; */ int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush) { - struct tty_struct *tty; unsigned long flags; struct sk_buff *skb; int count; @@ -109,10 +108,6 @@ int ircomm_param_request(struct ircomm_tty_cb *self, __u8 pi, int flush) IRDA_ASSERT(self != NULL, return -1;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); - tty = self->tty; - if (!tty) - return 0; - /* Make sure we don't send parameters for raw mode */ if (self->service_type == IRCOMM_3_WIRE_RAW) return 0; diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 7b2152cfd42..03acc073b8c 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -242,18 +242,15 @@ err: * */ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, - struct file *filp) + struct tty_struct *tty, struct file *filp) { DECLARE_WAITQUEUE(wait, current); int retval; int do_clocal = 0, extra_count = 0; unsigned long flags; - struct tty_struct *tty; IRDA_DEBUG(2, "%s()\n", __func__ ); - tty = self->tty; - /* * If non-blocking mode is set, or the port is not enabled, * then make the check up front and then exit. @@ -412,8 +409,8 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) self->port.count++; tty->driver_data = self; - self->tty = tty; spin_unlock_irqrestore(&self->port.lock, flags); + tty_port_tty_set(&self->port, tty); IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __func__ , tty->driver->name, self->line, self->port.count); @@ -467,7 +464,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) if (ret) return ret; - ret = ircomm_tty_block_til_ready(self, filp); + ret = ircomm_tty_block_til_ready(self, tty, filp); if (ret) { IRDA_DEBUG(2, "%s(), returning after block_til_ready with %d\n", __func__ , @@ -548,7 +545,6 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) spin_lock_irqsave(&self->port.lock, flags); tty->closing = 0; - self->tty = NULL; if (self->port.blocked_open) { if (self->port.close_delay) { @@ -562,6 +558,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) self->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); spin_unlock_irqrestore(&self->port.lock, flags); wake_up_interruptible(&self->port.close_wait); + tty_port_tty_set(&self->port, NULL); } /* @@ -604,7 +601,7 @@ static void ircomm_tty_do_softint(struct work_struct *work) if (!self || self->magic != IRCOMM_TTY_MAGIC) return; - tty = self->tty; + tty = tty_port_tty_get(&self->port); if (!tty) return; @@ -625,7 +622,7 @@ static void ircomm_tty_do_softint(struct work_struct *work) } if (tty->hw_stopped) - return; + goto put; /* Unlink transmit buffer */ spin_lock_irqsave(&self->spinlock, flags); @@ -644,6 +641,8 @@ static void ircomm_tty_do_softint(struct work_struct *work) /* Check if user (still) wants to be waken up */ tty_wakeup(tty); +put: + tty_kref_put(tty); } /* @@ -1004,7 +1003,11 @@ static void ircomm_tty_hangup(struct tty_struct *tty) spin_lock_irqsave(&self->port.lock, flags); self->port.flags &= ~ASYNC_NORMAL_ACTIVE; - self->tty = NULL; + if (self->port.tty) { + set_bit(TTY_IO_ERROR, &self->port.tty->flags); + tty_kref_put(self->port.tty); + } + self->port.tty = NULL; self->port.count = 0; spin_unlock_irqrestore(&self->port.lock, flags); @@ -1068,7 +1071,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - tty = self->tty; + tty = tty_port_tty_get(&self->port); status = self->settings.dce; @@ -1089,10 +1092,10 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) tty_hangup(tty); /* Hangup will remote the tty, so better break out */ - return; + goto put; } } - if (self->port.flags & ASYNC_CTS_FLOW) { + if (tty && self->port.flags & ASYNC_CTS_FLOW) { if (tty->hw_stopped) { if (status & IRCOMM_CTS) { IRDA_DEBUG(2, @@ -1103,7 +1106,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) wake_up_interruptible(&self->port.open_wait); schedule_work(&self->tqueue); - return; + goto put; } } else { if (!(status & IRCOMM_CTS)) { @@ -1113,6 +1116,8 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) } } } +put: + tty_kref_put(tty); } /* @@ -1125,6 +1130,7 @@ static int ircomm_tty_data_indication(void *instance, void *sap, struct sk_buff *skb) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance; + struct tty_struct *tty; IRDA_DEBUG(2, "%s()\n", __func__ ); @@ -1132,7 +1138,8 @@ static int ircomm_tty_data_indication(void *instance, void *sap, IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;); IRDA_ASSERT(skb != NULL, return -1;); - if (!self->tty) { + tty = tty_port_tty_get(&self->port); + if (!tty) { IRDA_DEBUG(0, "%s(), no tty!\n", __func__ ); return 0; } @@ -1143,7 +1150,7 @@ static int ircomm_tty_data_indication(void *instance, void *sap, * Devices like WinCE can do this, and since they don't send any * params, we can just as well declare the hardware for running. */ - if (self->tty->hw_stopped && (self->flow == FLOW_START)) { + if (tty->hw_stopped && (self->flow == FLOW_START)) { IRDA_DEBUG(0, "%s(), polling for line settings!\n", __func__ ); ircomm_param_request(self, IRCOMM_POLL, TRUE); @@ -1156,8 +1163,9 @@ static int ircomm_tty_data_indication(void *instance, void *sap, * Use flip buffer functions since the code may be called from interrupt * context */ - tty_insert_flip_string(self->tty, skb->data, skb->len); - tty_flip_buffer_push(self->tty); + tty_insert_flip_string(tty, skb->data, skb->len); + tty_flip_buffer_push(tty); + tty_kref_put(tty); /* No need to kfree_skb - see ircomm_ttp_data_indication() */ @@ -1208,12 +1216,13 @@ static void ircomm_tty_flow_indication(void *instance, void *sap, IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - tty = self->tty; + tty = tty_port_tty_get(&self->port); switch (cmd) { case FLOW_START: IRDA_DEBUG(2, "%s(), hw start!\n", __func__ ); - tty->hw_stopped = 0; + if (tty) + tty->hw_stopped = 0; /* ircomm_tty_do_softint will take care of the rest */ schedule_work(&self->tqueue); @@ -1221,15 +1230,19 @@ static void ircomm_tty_flow_indication(void *instance, void *sap, default: /* If we get here, something is very wrong, better stop */ case FLOW_STOP: IRDA_DEBUG(2, "%s(), hw stopped!\n", __func__ ); - tty->hw_stopped = 1; + if (tty) + tty->hw_stopped = 1; break; } + + tty_kref_put(tty); self->flow = cmd; } #ifdef CONFIG_PROC_FS static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m) { + struct tty_struct *tty; char sep; seq_printf(m, "State: %s\n", ircomm_tty_state[self->state]); @@ -1356,9 +1369,12 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m) seq_printf(m, "Max data size: %d\n", self->max_data_size); seq_printf(m, "Max header size: %d\n", self->max_header_size); - if (self->tty) + tty = tty_port_tty_get(&self->port); + if (tty) { seq_printf(m, "Hardware: %s\n", - self->tty->hw_stopped ? "Stopped" : "Running"); + tty->hw_stopped ? "Stopped" : "Running"); + tty_kref_put(tty); + } } static int ircomm_tty_proc_show(struct seq_file *m, void *v) diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c index bed311af731..3ab70e7a071 100644 --- a/net/irda/ircomm/ircomm_tty_attach.c +++ b/net/irda/ircomm/ircomm_tty_attach.c @@ -130,6 +130,8 @@ static int (*state[])(struct ircomm_tty_cb *self, IRCOMM_TTY_EVENT event, */ int ircomm_tty_attach_cable(struct ircomm_tty_cb *self) { + struct tty_struct *tty; + IRDA_DEBUG(0, "%s()\n", __func__ ); IRDA_ASSERT(self != NULL, return -1;); @@ -142,7 +144,11 @@ int ircomm_tty_attach_cable(struct ircomm_tty_cb *self) } /* Make sure nobody tries to write before the link is up */ - self->tty->hw_stopped = 1; + tty = tty_port_tty_get(&self->port); + if (tty) { + tty->hw_stopped = 1; + tty_kref_put(tty); + } ircomm_tty_ias_register(self); @@ -398,23 +404,26 @@ void ircomm_tty_disconnect_indication(void *instance, void *sap, struct sk_buff *skb) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance; + struct tty_struct *tty; IRDA_DEBUG(2, "%s()\n", __func__ ); IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - if (!self->tty) + tty = tty_port_tty_get(&self->port); + if (!tty) return; /* This will stop control data transfers */ self->flow = FLOW_STOP; /* Stop data transfers */ - self->tty->hw_stopped = 1; + tty->hw_stopped = 1; ircomm_tty_do_event(self, IRCOMM_TTY_DISCONNECT_INDICATION, NULL, NULL); + tty_kref_put(tty); } /* @@ -550,12 +559,15 @@ void ircomm_tty_connect_indication(void *instance, void *sap, */ void ircomm_tty_link_established(struct ircomm_tty_cb *self) { + struct tty_struct *tty; + IRDA_DEBUG(2, "%s()\n", __func__ ); IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - if (!self->tty) + tty = tty_port_tty_get(&self->port); + if (!tty) return; del_timer(&self->watchdog_timer); @@ -569,17 +581,19 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self) if ((self->port.flags & ASYNC_CTS_FLOW) && ((self->settings.dce & IRCOMM_CTS) == 0)) { IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ ); - return; + goto put; } else { IRDA_DEBUG(1, "%s(), starting hardware!\n", __func__ ); - self->tty->hw_stopped = 0; + tty->hw_stopped = 0; /* Wake up processes blocked on open */ wake_up_interruptible(&self->port.open_wait); } schedule_work(&self->tqueue); +put: + tty_kref_put(tty); } /* @@ -983,9 +997,12 @@ static int ircomm_tty_state_ready(struct ircomm_tty_cb *self, self->settings.dce = IRCOMM_DELTA_CD; ircomm_tty_check_modem_status(self); } else { + struct tty_struct *tty = tty_port_tty_get(&self->port); IRDA_DEBUG(0, "%s(), hanging up!\n", __func__ ); - if (self->tty) - tty_hangup(self->tty); + if (tty) { + tty_hangup(tty); + tty_kref_put(tty); + } } break; default: diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c index 31b917e9c8d..0eab6500e99 100644 --- a/net/irda/ircomm/ircomm_tty_ioctl.c +++ b/net/irda/ircomm/ircomm_tty_ioctl.c @@ -52,17 +52,18 @@ * Change speed of the driver. If the remote device is a DCE, then this * should make it change the speed of its serial port */ -static void ircomm_tty_change_speed(struct ircomm_tty_cb *self) +static void ircomm_tty_change_speed(struct ircomm_tty_cb *self, + struct tty_struct *tty) { unsigned int cflag, cval; int baud; IRDA_DEBUG(2, "%s()\n", __func__ ); - if (!self->tty || !self->tty->termios || !self->ircomm) + if (!self->ircomm) return; - cflag = self->tty->termios->c_cflag; + cflag = tty->termios->c_cflag; /* byte size and parity */ switch (cflag & CSIZE) { @@ -81,7 +82,7 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self) cval |= IRCOMM_PARITY_EVEN; /* Determine divisor based on baud rate */ - baud = tty_get_baud_rate(self->tty); + baud = tty_get_baud_rate(tty); if (!baud) baud = 9600; /* B0 transition handled in rs_set_termios */ @@ -159,7 +160,7 @@ void ircomm_tty_set_termios(struct tty_struct *tty, return; } - ircomm_tty_change_speed(self); + ircomm_tty_change_speed(self, tty); /* Handle transition to B0 status */ if ((old_termios->c_cflag & CBAUD) && From 38c58032f07be4dee764baa573b233e9a828c119 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:22 +0200 Subject: [PATCH 019/235] TTY: ircomm, define local tty_port In some functions we use tty_port heavily. So let us have a local pointer to that variable instead of having self->port all over the code. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- net/irda/ircomm/ircomm_tty.c | 109 ++++++++++++++++++----------------- 1 file changed, 56 insertions(+), 53 deletions(-) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 03acc073b8c..199d9cbf994 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -244,6 +244,7 @@ err: static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, struct tty_struct *tty, struct file *filp) { + struct tty_port *port = &self->port; DECLARE_WAITQUEUE(wait, current); int retval; int do_clocal = 0, extra_count = 0; @@ -257,7 +258,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, */ if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){ /* nonblock mode is set or port is not enabled */ - self->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __func__ ); return 0; } @@ -269,24 +270,24 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, /* Wait for carrier detect and the line to become * free (i.e., not in use by the callout). While we are in - * this loop, self->port.count is dropped by one, so that + * this loop, port->count is dropped by one, so that * mgsl_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; - add_wait_queue(&self->port.open_wait, &wait); + add_wait_queue(&port->open_wait, &wait); IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n", - __FILE__, __LINE__, tty->driver->name, self->port.count); + __FILE__, __LINE__, tty->driver->name, port->count); - spin_lock_irqsave(&self->port.lock, flags); + spin_lock_irqsave(&port->lock, flags); if (!tty_hung_up_p(filp)) { extra_count = 1; - self->port.count--; + port->count--; } - spin_unlock_irqrestore(&self->port.lock, flags); - self->port.blocked_open++; + spin_unlock_irqrestore(&port->lock, flags); + port->blocked_open++; while (1) { if (tty->termios->c_cflag & CBAUD) { @@ -302,8 +303,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, current->state = TASK_INTERRUPTIBLE; if (tty_hung_up_p(filp) || - !test_bit(ASYNCB_INITIALIZED, &self->port.flags)) { - retval = (self->port.flags & ASYNC_HUP_NOTIFY) ? + !test_bit(ASYNCB_INITIALIZED, &port->flags)) { + retval = (port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS; break; } @@ -313,7 +314,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, * specified, we cannot return before the IrCOMM link is * ready */ - if (!test_bit(ASYNCB_CLOSING, &self->port.flags) && + if (!test_bit(ASYNCB_CLOSING, &port->flags) && (do_clocal || (self->settings.dce & IRCOMM_CD)) && self->state == IRCOMM_TTY_READY) { @@ -326,27 +327,27 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, } IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n", - __FILE__, __LINE__, tty->driver->name, self->port.count); + __FILE__, __LINE__, tty->driver->name, port->count); schedule(); } __set_current_state(TASK_RUNNING); - remove_wait_queue(&self->port.open_wait, &wait); + remove_wait_queue(&port->open_wait, &wait); if (extra_count) { /* ++ is not atomic, so this should be protected - Jean II */ - spin_lock_irqsave(&self->port.lock, flags); - self->port.count++; - spin_unlock_irqrestore(&self->port.lock, flags); + spin_lock_irqsave(&port->lock, flags); + port->count++; + spin_unlock_irqrestore(&port->lock, flags); } - self->port.blocked_open--; + port->blocked_open--; IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n", - __FILE__, __LINE__, tty->driver->name, self->port.count); + __FILE__, __LINE__, tty->driver->name, port->count); if (!retval) - self->port.flags |= ASYNC_NORMAL_ACTIVE; + port->flags |= ASYNC_NORMAL_ACTIVE; return retval; } @@ -484,6 +485,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; + struct tty_port *port = &self->port; unsigned long flags; IRDA_DEBUG(0, "%s()\n", __func__ ); @@ -491,16 +493,16 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - spin_lock_irqsave(&self->port.lock, flags); + spin_lock_irqsave(&port->lock, flags); if (tty_hung_up_p(filp)) { - spin_unlock_irqrestore(&self->port.lock, flags); + spin_unlock_irqrestore(&port->lock, flags); IRDA_DEBUG(0, "%s(), returning 1\n", __func__ ); return; } - if ((tty->count == 1) && (self->port.count != 1)) { + if ((tty->count == 1) && (port->count != 1)) { /* * Uh, oh. tty->count is 1, which means that the tty * structure will be freed. state->count should always @@ -510,55 +512,55 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) */ IRDA_DEBUG(0, "%s(), bad serial port count; " "tty->count is 1, state->count is %d\n", __func__ , - self->port.count); - self->port.count = 1; + port->count); + port->count = 1; } - if (--self->port.count < 0) { + if (--port->count < 0) { IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n", - __func__, self->line, self->port.count); - self->port.count = 0; + __func__, self->line, port->count); + port->count = 0; } - if (self->port.count) { - spin_unlock_irqrestore(&self->port.lock, flags); + if (port->count) { + spin_unlock_irqrestore(&port->lock, flags); IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ ); return; } - set_bit(ASYNCB_CLOSING, &self->port.flags); + set_bit(ASYNCB_CLOSING, &port->flags); - spin_unlock_irqrestore(&self->port.lock, flags); + spin_unlock_irqrestore(&port->lock, flags); /* * Now we wait for the transmit buffer to clear; and we notify * the line discipline to only process XON/XOFF characters. */ tty->closing = 1; - if (self->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent_from_close(tty, self->port.closing_wait); + if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) + tty_wait_until_sent_from_close(tty, port->closing_wait); ircomm_tty_shutdown(self); tty_driver_flush_buffer(tty); tty_ldisc_flush(tty); - spin_lock_irqsave(&self->port.lock, flags); + spin_lock_irqsave(&port->lock, flags); tty->closing = 0; - if (self->port.blocked_open) { - if (self->port.close_delay) { - spin_unlock_irqrestore(&self->port.lock, flags); - schedule_timeout_interruptible(self->port.close_delay); - spin_lock_irqsave(&self->port.lock, flags); + if (port->blocked_open) { + if (port->close_delay) { + spin_unlock_irqrestore(&port->lock, flags); + schedule_timeout_interruptible(port->close_delay); + spin_lock_irqsave(&port->lock, flags); } - wake_up_interruptible(&self->port.open_wait); + wake_up_interruptible(&port->open_wait); } - self->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - spin_unlock_irqrestore(&self->port.lock, flags); - wake_up_interruptible(&self->port.close_wait); - tty_port_tty_set(&self->port, NULL); + port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); + spin_unlock_irqrestore(&port->lock, flags); + wake_up_interruptible(&port->close_wait); + tty_port_tty_set(port, NULL); } /* @@ -991,6 +993,7 @@ static void ircomm_tty_shutdown(struct ircomm_tty_cb *self) static void ircomm_tty_hangup(struct tty_struct *tty) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; + struct tty_port *port = &self->port; unsigned long flags; IRDA_DEBUG(0, "%s()\n", __func__ ); @@ -1001,17 +1004,17 @@ static void ircomm_tty_hangup(struct tty_struct *tty) /* ircomm_tty_flush_buffer(tty); */ ircomm_tty_shutdown(self); - spin_lock_irqsave(&self->port.lock, flags); - self->port.flags &= ~ASYNC_NORMAL_ACTIVE; - if (self->port.tty) { - set_bit(TTY_IO_ERROR, &self->port.tty->flags); - tty_kref_put(self->port.tty); + spin_lock_irqsave(&port->lock, flags); + port->flags &= ~ASYNC_NORMAL_ACTIVE; + if (port->tty) { + set_bit(TTY_IO_ERROR, &port->tty->flags); + tty_kref_put(port->tty); } - self->port.tty = NULL; - self->port.count = 0; - spin_unlock_irqrestore(&self->port.lock, flags); + port->tty = NULL; + port->count = 0; + spin_unlock_irqrestore(&port->lock, flags); - wake_up_interruptible(&self->port.open_wait); + wake_up_interruptible(&port->open_wait); } /* From 0ba9ff846b2f4720e30ace37b028ef14fb97fb74 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:23 +0200 Subject: [PATCH 020/235] TTY: ircomm, define carrier routines These will be used by the tty_port wait_til_ready later. (Now they are used by our code.) Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- net/irda/ircomm/ircomm_tty.c | 43 +++++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 10 deletions(-) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 199d9cbf994..3fdce18c693 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -104,6 +104,35 @@ static const struct tty_operations ops = { #endif /* CONFIG_PROC_FS */ }; +static void ircomm_port_raise_dtr_rts(struct tty_port *port, int raise) +{ + struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb, + port); + /* + * Here, we use to lock those two guys, but as ircomm_param_request() + * does it itself, I don't see the point (and I see the deadlock). + * Jean II + */ + if (raise) + self->settings.dte |= IRCOMM_RTS | IRCOMM_DTR; + else + self->settings.dte &= ~(IRCOMM_RTS | IRCOMM_DTR); + + ircomm_param_request(self, IRCOMM_DTE, TRUE); +} + +static int ircomm_port_carrier_raised(struct tty_port *port) +{ + struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb, + port); + return self->settings.dce & IRCOMM_CD; +} + +static const struct tty_port_operations ircomm_port_ops = { + .dtr_rts = ircomm_port_raise_dtr_rts, + .carrier_raised = ircomm_port_carrier_raised, +}; + /* * Function ircomm_tty_init() * @@ -290,15 +319,8 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, port->blocked_open++; while (1) { - if (tty->termios->c_cflag & CBAUD) { - /* Here, we use to lock those two guys, but - * as ircomm_param_request() does it itself, - * I don't see the point (and I see the deadlock). - * Jean II */ - self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR; - - ircomm_param_request(self, IRCOMM_DTE, TRUE); - } + if (tty->termios->c_cflag & CBAUD) + tty_port_raise_dtr_rts(port); current->state = TASK_INTERRUPTIBLE; @@ -315,7 +337,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, * ready */ if (!test_bit(ASYNCB_CLOSING, &port->flags) && - (do_clocal || (self->settings.dce & IRCOMM_CD)) && + (do_clocal || tty_port_carrier_raised(port)) && self->state == IRCOMM_TTY_READY) { break; @@ -379,6 +401,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) } tty_port_init(&self->port); + self->port.ops = &ircomm_port_ops; self->magic = IRCOMM_TTY_MAGIC; self->flow = FLOW_STOP; From a1e844036af9cb0d87e878a4f90ce64713c76e5a Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:24 +0200 Subject: [PATCH 021/235] TTY: ircomm, use tty_port_close_end helper Again, the code is identical, so leverage the helper code. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- net/irda/ircomm/ircomm_tty.c | 16 +--------------- 1 file changed, 1 insertion(+), 15 deletions(-) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 3fdce18c693..cfe352dfb48 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -568,21 +568,7 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) tty_driver_flush_buffer(tty); tty_ldisc_flush(tty); - spin_lock_irqsave(&port->lock, flags); - tty->closing = 0; - - if (port->blocked_open) { - if (port->close_delay) { - spin_unlock_irqrestore(&port->lock, flags); - schedule_timeout_interruptible(port->close_delay); - spin_lock_irqsave(&port->lock, flags); - } - wake_up_interruptible(&port->open_wait); - } - - port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); - spin_unlock_irqrestore(&port->lock, flags); - wake_up_interruptible(&port->close_wait); + tty_port_close_end(port, tty); tty_port_tty_set(port, NULL); } From c0e7865003ae9929f32bcb7277f591115fa242b7 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:25 +0200 Subject: [PATCH 022/235] TTY: ircomm, use tty_port_close_start helper Again, the code is identical, so leverage the helper code. Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Cc: netdev@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- net/irda/ircomm/ircomm_tty.c | 48 +----------------------------------- 1 file changed, 1 insertion(+), 47 deletions(-) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index cfe352dfb48..4e35b45c1c7 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -509,64 +509,18 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; struct tty_port *port = &self->port; - unsigned long flags; IRDA_DEBUG(0, "%s()\n", __func__ ); IRDA_ASSERT(self != NULL, return;); IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;); - spin_lock_irqsave(&port->lock, flags); - - if (tty_hung_up_p(filp)) { - spin_unlock_irqrestore(&port->lock, flags); - - IRDA_DEBUG(0, "%s(), returning 1\n", __func__ ); + if (tty_port_close_start(port, tty, filp) == 0) return; - } - - if ((tty->count == 1) && (port->count != 1)) { - /* - * Uh, oh. tty->count is 1, which means that the tty - * structure will be freed. state->count should always - * be one in these conditions. If it's greater than - * one, we've got real problems, since it means the - * serial port won't be shutdown. - */ - IRDA_DEBUG(0, "%s(), bad serial port count; " - "tty->count is 1, state->count is %d\n", __func__ , - port->count); - port->count = 1; - } - - if (--port->count < 0) { - IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n", - __func__, self->line, port->count); - port->count = 0; - } - if (port->count) { - spin_unlock_irqrestore(&port->lock, flags); - - IRDA_DEBUG(0, "%s(), open count > 0\n", __func__ ); - return; - } - - set_bit(ASYNCB_CLOSING, &port->flags); - - spin_unlock_irqrestore(&port->lock, flags); - - /* - * Now we wait for the transmit buffer to clear; and we notify - * the line discipline to only process XON/XOFF characters. - */ - tty->closing = 1; - if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) - tty_wait_until_sent_from_close(tty, port->closing_wait); ircomm_tty_shutdown(self); tty_driver_flush_buffer(tty); - tty_ldisc_flush(tty); tty_port_close_end(port, tty); tty_port_tty_set(port, NULL); From 042e6c29c16c9c20c31110b611ed60187b0c873a Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:26 +0200 Subject: [PATCH 023/235] TTY: um/line, add tty_port And use count from there. Signed-off-by: Jiri Slaby Cc: Jeff Dike Cc: Richard Weinberger Cc: user-mode-linux-devel@lists.sourceforge.net Signed-off-by: Greg Kroah-Hartman --- arch/um/drivers/line.c | 7 ++++--- arch/um/drivers/line.h | 2 +- 2 files changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index acfd0e0fd0c..482a7bd4a64 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -404,7 +404,7 @@ int line_open(struct line *lines, struct tty_struct *tty) goto out_unlock; err = 0; - if (line->count++) + if (line->port.count++) goto out_unlock; BUG_ON(tty->driver_data); @@ -446,7 +446,7 @@ void line_close(struct tty_struct *tty, struct file * filp) mutex_lock(&line->count_lock); BUG_ON(!line->valid); - if (--line->count) + if (--line->port.count) goto out_unlock; line->tty = NULL; @@ -478,7 +478,7 @@ int setup_one_line(struct line *lines, int n, char *init, mutex_lock(&line->count_lock); - if (line->count) { + if (line->port.count) { *error_out = "Device is already open"; goto out; } @@ -663,6 +663,7 @@ int register_lines(struct line_driver *line_driver, driver->init_termios = tty_std_termios; for (i = 0; i < nlines; i++) { + tty_port_init(&lines[i].port); spin_lock_init(&lines[i].lock); mutex_init(&lines[i].count_lock); lines[i].driver = line_driver; diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h index 0a1834719db..0e06a1f441d 100644 --- a/arch/um/drivers/line.h +++ b/arch/um/drivers/line.h @@ -32,9 +32,9 @@ struct line_driver { }; struct line { + struct tty_port port; struct tty_struct *tty; struct mutex count_lock; - unsigned long count; int valid; char *init_str; From 95f4d5f01bb56b4f940c8b44be8e71c5f35f2069 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:27 +0200 Subject: [PATCH 024/235] TTY: um/line, use tty from tty_port This means switching to the tty refcounted model so that we will not race with interrupts. Signed-off-by: Jiri Slaby Cc: Jeff Dike Cc: Richard Weinberger Cc: user-mode-linux-devel@lists.sourceforge.net Signed-off-by: Greg Kroah-Hartman --- arch/um/drivers/chan_kern.c | 4 +++- arch/um/drivers/line.c | 25 ++++++++++++++++++------- arch/um/drivers/line.h | 1 - 3 files changed, 21 insertions(+), 9 deletions(-) diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c index 45e248c2f43..87eebfe03c6 100644 --- a/arch/um/drivers/chan_kern.c +++ b/arch/um/drivers/chan_kern.c @@ -150,9 +150,11 @@ void chan_enable_winch(struct chan *chan, struct tty_struct *tty) static void line_timer_cb(struct work_struct *work) { struct line *line = container_of(work, struct line, task.work); + struct tty_struct *tty = tty_port_tty_get(&line->port); if (!line->throttled) - chan_interrupt(line, line->tty, line->driver->read_irq); + chan_interrupt(line, tty, line->driver->read_irq); + tty_kref_put(tty); } int enable_chan(struct line *line) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index 482a7bd4a64..fb6e4ea0992 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -19,9 +19,11 @@ static irqreturn_t line_interrupt(int irq, void *data) { struct chan *chan = data; struct line *line = chan->line; + struct tty_struct *tty = tty_port_tty_get(&line->port); if (line) - chan_interrupt(line, line->tty, irq); + chan_interrupt(line, tty, irq); + tty_kref_put(tty); return IRQ_HANDLED; } @@ -333,7 +335,7 @@ static irqreturn_t line_write_interrupt(int irq, void *data) { struct chan *chan = data; struct line *line = chan->line; - struct tty_struct *tty = line->tty; + struct tty_struct *tty; int err; /* @@ -352,10 +354,13 @@ static irqreturn_t line_write_interrupt(int irq, void *data) } spin_unlock(&line->lock); + tty = tty_port_tty_get(&line->port); if (tty == NULL) return IRQ_NONE; tty_wakeup(tty); + tty_kref_put(tty); + return IRQ_HANDLED; } @@ -409,7 +414,7 @@ int line_open(struct line *lines, struct tty_struct *tty) BUG_ON(tty->driver_data); tty->driver_data = line; - line->tty = tty; + tty_port_tty_set(&line->port, tty); err = enable_chan(line); if (err) /* line_close() will be called by our caller */ @@ -449,7 +454,7 @@ void line_close(struct tty_struct *tty, struct file * filp) if (--line->port.count) goto out_unlock; - line->tty = NULL; + tty_port_tty_set(&line->port, NULL); tty->driver_data = NULL; if (line->sigio) { @@ -610,9 +615,15 @@ int line_get_config(char *name, struct line *lines, unsigned int num, char *str, mutex_lock(&line->count_lock); if (!line->valid) CONFIG_CHUNK(str, size, n, "none", 1); - else if (line->tty == NULL) - CONFIG_CHUNK(str, size, n, line->init_str, 1); - else n = chan_config_string(line, str, size, error_out); + else { + struct tty_struct *tty = tty_port_tty_get(&line->port); + if (tty == NULL) { + CONFIG_CHUNK(str, size, n, line->init_str, 1); + } else { + n = chan_config_string(line, str, size, error_out); + tty_kref_put(tty); + } + } mutex_unlock(&line->count_lock); return n; diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h index 0e06a1f441d..5b3d4fbdec1 100644 --- a/arch/um/drivers/line.h +++ b/arch/um/drivers/line.h @@ -33,7 +33,6 @@ struct line_driver { struct line { struct tty_port port; - struct tty_struct *tty; struct mutex count_lock; int valid; From 9800ee6f50a3b94181d4df57542b9379e331decb Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 13 Jun 2012 00:28:23 +0200 Subject: [PATCH 025/235] serial: sh-sci: Fix probe error paths When probing fails, the driver must not try to cleanup resources that have not been initialized. Fix this. Signed-off-by: Laurent Pinchart Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sh-sci.c | 36 +++++++++++++++++++++++------------- 1 file changed, 23 insertions(+), 13 deletions(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 4604153b795..27df2ad4826 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2179,6 +2179,16 @@ static int __devinit sci_init_single(struct platform_device *dev, return 0; } +static void sci_cleanup_single(struct sci_port *port) +{ + sci_free_gpios(port); + + clk_put(port->iclk); + clk_put(port->fclk); + + pm_runtime_disable(port->port.dev); +} + #ifdef CONFIG_SERIAL_SH_SCI_CONSOLE static void serial_console_putchar(struct uart_port *port, int ch) { @@ -2360,14 +2370,10 @@ static int sci_remove(struct platform_device *dev) cpufreq_unregister_notifier(&port->freq_transition, CPUFREQ_TRANSITION_NOTIFIER); - sci_free_gpios(port); - uart_remove_one_port(&sci_uart_driver, &port->port); - clk_put(port->iclk); - clk_put(port->fclk); + sci_cleanup_single(port); - pm_runtime_disable(&dev->dev); return 0; } @@ -2392,7 +2398,13 @@ static int __devinit sci_probe_single(struct platform_device *dev, if (ret) return ret; - return uart_add_one_port(&sci_uart_driver, &sciport->port); + ret = uart_add_one_port(&sci_uart_driver, &sciport->port); + if (ret) { + sci_cleanup_single(sciport); + return ret; + } + + return 0; } static int __devinit sci_probe(struct platform_device *dev) @@ -2413,24 +2425,22 @@ static int __devinit sci_probe(struct platform_device *dev) ret = sci_probe_single(dev, dev->id, p, sp); if (ret) - goto err_unreg; + return ret; sp->freq_transition.notifier_call = sci_notifier; ret = cpufreq_register_notifier(&sp->freq_transition, CPUFREQ_TRANSITION_NOTIFIER); - if (unlikely(ret < 0)) - goto err_unreg; + if (unlikely(ret < 0)) { + sci_cleanup_single(sp); + return ret; + } #ifdef CONFIG_SH_STANDARD_BIOS sh_bios_gdb_detach(); #endif return 0; - -err_unreg: - sci_remove(dev); - return ret; } static int sci_suspend(struct device *dev) From 8856a7d6b7c39eece126f23c6cdbd11ff2218d6f Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 13 Jun 2012 00:28:24 +0200 Subject: [PATCH 026/235] serial: sh-sci: Make probe fail for ports that exceed the maximum count The driver supports a maximum number of ports configurable at compile time. Make sure the probe() method fails when registering a port that exceeds the maximum instead of returning success without registering the port. This fixes a crash at system suspend time, when the driver tried to suspend a non-registered port using the UART core. Signed-off-by: Laurent Pinchart Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sh-sci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index 27df2ad4826..1bd9163bc11 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -2391,7 +2391,7 @@ static int __devinit sci_probe_single(struct platform_device *dev, index+1, SCI_NPORTS); dev_notice(&dev->dev, "Consider bumping " "CONFIG_SERIAL_SH_SCI_NR_UARTS!\n"); - return 0; + return -EINVAL; } ret = sci_init_single(dev, sciport, index, p); From 7171604ae7b3bbc738b6a4b7cd0ee73eb0d551d9 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:28 +0200 Subject: [PATCH 027/235] PTY: remove one empty ops->remove Currently, there are two as a left-over from previous patches. Although we really need to provide an empty handler, we do not need two. So remove one of them. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 5505ffc91da..4bcaf896fac 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -557,18 +557,14 @@ err_free_tty: return -ENOMEM; } -static void ptm_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) -{ -} - -static void pts_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) +static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) { } static const struct tty_operations ptm_unix98_ops = { .lookup = ptm_unix98_lookup, .install = pty_unix98_install, - .remove = ptm_unix98_remove, + .remove = pty_unix98_remove, .open = pty_open, .close = pty_close, .write = pty_write, @@ -585,7 +581,7 @@ static const struct tty_operations ptm_unix98_ops = { static const struct tty_operations pty_unix98_ops = { .lookup = pts_unix98_lookup, .install = pty_unix98_install, - .remove = pts_unix98_remove, + .remove = pty_unix98_remove, .open = pty_open, .close = pty_close, .write = pty_write, From 5d249bc6a61e7a434c69e0d0becc77a803c8c5e8 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:29 +0200 Subject: [PATCH 028/235] PTY: merge pty_install implementations There are currently two instances of code which handles PTY install. One for the legacy BSD PTY's, one for unix98's PTY's. Both of them are very similar and differ only in termios allocation and handling. Since we will need to allocate a tty_port at that place, this would require editing two places with the same pattern. Instead, let us move the implementation to one common place and call it from both places. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 108 +++++++++++++++++++--------------------------- 1 file changed, 44 insertions(+), 64 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 4bcaf896fac..881888f0a44 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -282,39 +282,53 @@ done: return 0; } -/* Traditional BSD devices */ -#ifdef CONFIG_LEGACY_PTYS - -static int pty_install(struct tty_driver *driver, struct tty_struct *tty) +static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, + bool legacy) { struct tty_struct *o_tty; int idx = tty->index; - int retval; + int retval = -ENOMEM; o_tty = alloc_tty_struct(); if (!o_tty) - return -ENOMEM; + goto err; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ - retval = -ENOMEM; goto err_free_tty; } initialize_tty_struct(o_tty, driver->other, idx); - /* We always use new tty termios data so we can do this - the easy way .. */ - retval = tty_init_termios(tty); - if (retval) - goto err_deinit_tty; + if (legacy) { + /* We always use new tty termios data so we can do this + the easy way .. */ + retval = tty_init_termios(tty); + if (retval) + goto err_deinit_tty; - retval = tty_init_termios(o_tty); - if (retval) - goto err_free_termios; + retval = tty_init_termios(o_tty); + if (retval) + goto err_free_termios; + + driver->other->ttys[idx] = o_tty; + driver->ttys[idx] = tty; + } else { + tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); + if (tty->termios == NULL) + goto err_deinit_tty; + *tty->termios = driver->init_termios; + tty->termios_locked = tty->termios + 1; + + o_tty->termios = kzalloc(sizeof(struct ktermios[2]), + GFP_KERNEL); + if (o_tty->termios == NULL) + goto err_free_termios; + *o_tty->termios = driver->other->init_termios; + o_tty->termios_locked = o_tty->termios + 1; + } /* * Everything allocated ... set up the o_tty structure. */ - driver->other->ttys[idx] = o_tty; tty_driver_kref_get(driver->other); if (driver->subtype == PTY_TYPE_MASTER) o_tty->count++; @@ -324,18 +338,29 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) tty_driver_kref_get(driver); tty->count++; - driver->ttys[idx] = tty; return 0; err_free_termios: - tty_free_termios(tty); + if (legacy) + tty_free_termios(tty); + else + kfree(tty->termios); err_deinit_tty: deinitialize_tty_struct(o_tty); module_put(o_tty->driver->owner); err_free_tty: free_tty_struct(o_tty); +err: return retval; } +/* Traditional BSD devices */ +#ifdef CONFIG_LEGACY_PTYS + +static int pty_install(struct tty_driver *driver, struct tty_struct *tty) +{ + return pty_common_install(driver, tty, true); +} + static int pty_bsd_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { @@ -509,52 +534,7 @@ static void pty_unix98_shutdown(struct tty_struct *tty) static int pty_unix98_install(struct tty_driver *driver, struct tty_struct *tty) { - struct tty_struct *o_tty; - int idx = tty->index; - - o_tty = alloc_tty_struct(); - if (!o_tty) - return -ENOMEM; - if (!try_module_get(driver->other->owner)) { - /* This cannot in fact currently happen */ - goto err_free_tty; - } - initialize_tty_struct(o_tty, driver->other, idx); - - tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); - if (tty->termios == NULL) - goto err_free_mem; - *tty->termios = driver->init_termios; - tty->termios_locked = tty->termios + 1; - - o_tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); - if (o_tty->termios == NULL) - goto err_free_mem; - *o_tty->termios = driver->other->init_termios; - o_tty->termios_locked = o_tty->termios + 1; - - tty_driver_kref_get(driver->other); - if (driver->subtype == PTY_TYPE_MASTER) - o_tty->count++; - /* Establish the links in both directions */ - tty->link = o_tty; - o_tty->link = tty; - /* - * All structures have been allocated, so now we install them. - * Failures after this point use release_tty to clean up, so - * there's no need to null out the local pointers. - */ - tty_driver_kref_get(driver); - tty->count++; - return 0; -err_free_mem: - deinitialize_tty_struct(o_tty); - kfree(o_tty->termios); - kfree(tty->termios); - module_put(o_tty->driver->owner); -err_free_tty: - free_tty_struct(o_tty); - return -ENOMEM; + return pty_common_install(driver, tty, false); } static void pty_unix98_remove(struct tty_driver *driver, struct tty_struct *tty) From d03702a27df017d1807fd4809f03adaa8e37005f Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:30 +0200 Subject: [PATCH 029/235] PTY: add tty_port This has *no* function in the PTY driver yet. However as the tty buffers will move to the tty_port structure, we will need tty_port for all TTYs in the system, PTY inclusive. For PTYs this is ensured by allocating 2 tty_port's in pty_install, i.e. where the tty->link is allocated. Both tty_port's are properly assigned to each end of the tty. Freeing is done at the same place where tty is freed, i.e. in tty->ops->cleanup. This means BTW that tty_port does not outlive TTY in PTY. This might be a subject to change in the future if we see some problems. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 881888f0a44..b50fc1c0141 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -286,12 +286,15 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, bool legacy) { struct tty_struct *o_tty; + struct tty_port *ports[2]; int idx = tty->index; int retval = -ENOMEM; o_tty = alloc_tty_struct(); - if (!o_tty) - goto err; + ports[0] = kmalloc(sizeof **ports, GFP_KERNEL); + ports[1] = kmalloc(sizeof **ports, GFP_KERNEL); + if (!o_tty || !ports[0] || !ports[1]) + goto err_free_tty; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ goto err_free_tty; @@ -335,6 +338,10 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, /* Establish the links in both directions */ tty->link = o_tty; o_tty->link = tty; + tty_port_init(ports[0]); + tty_port_init(ports[1]); + o_tty->port = ports[0]; + tty->port = ports[1]; tty_driver_kref_get(driver); tty->count++; @@ -348,11 +355,17 @@ err_deinit_tty: deinitialize_tty_struct(o_tty); module_put(o_tty->driver->owner); err_free_tty: + kfree(ports[0]); + kfree(ports[1]); free_tty_struct(o_tty); -err: return retval; } +static void pty_cleanup(struct tty_struct *tty) +{ + kfree(tty->port); +} + /* Traditional BSD devices */ #ifdef CONFIG_LEGACY_PTYS @@ -391,6 +404,7 @@ static const struct tty_operations master_pty_ops_bsd = { .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, .ioctl = pty_bsd_ioctl, + .cleanup = pty_cleanup, .resize = pty_resize }; @@ -404,6 +418,7 @@ static const struct tty_operations slave_pty_ops_bsd = { .chars_in_buffer = pty_chars_in_buffer, .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, + .cleanup = pty_cleanup, .resize = pty_resize }; @@ -555,6 +570,7 @@ static const struct tty_operations ptm_unix98_ops = { .set_termios = pty_set_termios, .ioctl = pty_unix98_ioctl, .shutdown = pty_unix98_shutdown, + .cleanup = pty_cleanup, .resize = pty_resize }; @@ -570,7 +586,8 @@ static const struct tty_operations pty_unix98_ops = { .chars_in_buffer = pty_chars_in_buffer, .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, - .shutdown = pty_unix98_shutdown + .shutdown = pty_unix98_shutdown, + .cleanup = pty_cleanup, }; /** From 4c2ef53d3bfb36659c47ba589f35bcab24f425c7 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:31 +0200 Subject: [PATCH 030/235] TTY: vt, remove con_schedule_flip This is identical to tty_schedule_flip. So let us use that instead. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/keyboard.c | 6 +++--- drivers/tty/vt/vt.c | 2 +- include/linux/kbd_kern.h | 12 ------------ 3 files changed, 4 insertions(+), 16 deletions(-) diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index 48cc6f25cfd..0b6217c9303 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -310,7 +310,7 @@ static void put_queue(struct vc_data *vc, int ch) if (tty) { tty_insert_flip_char(tty, ch, 0); - con_schedule_flip(tty); + tty_schedule_flip(tty); } } @@ -325,7 +325,7 @@ static void puts_queue(struct vc_data *vc, char *cp) tty_insert_flip_char(tty, *cp, 0); cp++; } - con_schedule_flip(tty); + tty_schedule_flip(tty); } static void applkey(struct vc_data *vc, int key, char mode) @@ -586,7 +586,7 @@ static void fn_send_intr(struct vc_data *vc) if (!tty) return; tty_insert_flip_char(tty, 0, TTY_BREAK); - con_schedule_flip(tty); + tty_schedule_flip(tty); } static void fn_scroll_forw(struct vc_data *vc) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 84cbf298c09..88a4914ef55 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -1380,7 +1380,7 @@ static void respond_string(const char *p, struct tty_struct *tty) tty_insert_flip_char(tty, *p, 0); p++; } - con_schedule_flip(tty); + tty_schedule_flip(tty); } static void cursor_report(struct vc_data *vc, struct tty_struct *tty) diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h index daf4a3a40ee..af9137db303 100644 --- a/include/linux/kbd_kern.h +++ b/include/linux/kbd_kern.h @@ -145,16 +145,4 @@ void compute_shiftstate(void); extern unsigned int keymap_count; -/* console.c */ - -static inline void con_schedule_flip(struct tty_struct *t) -{ - unsigned long flags; - spin_lock_irqsave(&t->buf.lock, flags); - if (t->buf.tail != NULL) - t->buf.tail->commit = t->buf.tail->used; - spin_unlock_irqrestore(&t->buf.lock, flags); - schedule_work(&t->buf.work); -} - #endif From 695586ca20c56cf8cfa87160383307a288d32496 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:32 +0200 Subject: [PATCH 031/235] TTY: provide drivers with tty_port_install This will be used in tty_ops->install to set tty->port (and to call tty_standard_install). Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_port.c | 8 ++++++++ include/linux/tty.h | 2 ++ 2 files changed, 10 insertions(+) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index bf6e238146a..1ac8abf4708 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -413,6 +413,14 @@ void tty_port_close(struct tty_port *port, struct tty_struct *tty, } EXPORT_SYMBOL(tty_port_close); +int tty_port_install(struct tty_port *port, struct tty_driver *driver, + struct tty_struct *tty) +{ + tty->port = port; + return tty_standard_install(driver, tty); +} +EXPORT_SYMBOL_GPL(tty_port_install); + int tty_port_open(struct tty_port *port, struct tty_struct *tty, struct file *filp) { diff --git a/include/linux/tty.h b/include/linux/tty.h index 9f47ab540f6..45ef71df0e7 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -521,6 +521,8 @@ extern int tty_port_close_start(struct tty_port *port, extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty); extern void tty_port_close(struct tty_port *port, struct tty_struct *tty, struct file *filp); +extern int tty_port_install(struct tty_port *port, struct tty_driver *driver, + struct tty_struct *tty); extern int tty_port_open(struct tty_port *port, struct tty_struct *tty, struct file *filp); static inline int tty_port_users(struct tty_port *port) From bc1e99d93f096d5736c0bd3c2d17e13f27b6eb09 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:33 +0200 Subject: [PATCH 032/235] TTY: vt, add ->install We need to initialize the console only on the first open. This is usually what is done in the ->install hook. vt used to do this in ->open. Now we move it to ->install and use newly added helper for install: tty_port_install. It ensures tty->port to be set properly. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 60 +++++++++++++++++++++++++++------------------ 1 file changed, 36 insertions(+), 24 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 88a4914ef55..7cb53c23633 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2792,41 +2792,52 @@ static void con_flush_chars(struct tty_struct *tty) /* * Allocate the console screen memory. */ -static int con_open(struct tty_struct *tty, struct file *filp) +static int con_install(struct tty_driver *driver, struct tty_struct *tty) { unsigned int currcons = tty->index; - int ret = 0; + struct vc_data *vc; + int ret; console_lock(); - if (tty->driver_data == NULL) { - ret = vc_allocate(currcons); - if (ret == 0) { - struct vc_data *vc = vc_cons[currcons].d; + ret = vc_allocate(currcons); + if (ret) + goto unlock; - /* Still being freed */ - if (vc->port.tty) { - console_unlock(); - return -ERESTARTSYS; - } - tty->driver_data = vc; - vc->port.tty = tty; + vc = vc_cons[currcons].d; - if (!tty->winsize.ws_row && !tty->winsize.ws_col) { - tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; - tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; - } - if (vc->vc_utf) - tty->termios->c_iflag |= IUTF8; - else - tty->termios->c_iflag &= ~IUTF8; - console_unlock(); - return ret; - } + /* Still being freed */ + if (vc->port.tty) { + ret = -ERESTARTSYS; + goto unlock; } + + ret = tty_port_install(&vc->port, driver, tty); + if (ret) + goto unlock; + + tty->driver_data = vc; + vc->port.tty = tty; + + if (!tty->winsize.ws_row && !tty->winsize.ws_col) { + tty->winsize.ws_row = vc_cons[currcons].d->vc_rows; + tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; + } + if (vc->vc_utf) + tty->termios->c_iflag |= IUTF8; + else + tty->termios->c_iflag &= ~IUTF8; +unlock: console_unlock(); return ret; } +static int con_open(struct tty_struct *tty, struct file *filp) +{ + /* everything done in install */ + return 0; +} + + static void con_close(struct tty_struct *tty, struct file *filp) { /* Nothing to do - we defer to shutdown */ @@ -2947,6 +2958,7 @@ static int __init con_init(void) console_initcall(con_init); static const struct tty_operations con_ops = { + .install = con_install, .open = con_open, .close = con_close, .write = con_write, From ca4ff100d36b2c1da93a0a121177f73eea154471 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:34 +0200 Subject: [PATCH 033/235] TTY: usb-serial, use tty_port_install To have tty->port set in ->install. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/usb-serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 6a1b609a0d9..2dc92d5cbb1 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -207,7 +207,7 @@ static int serial_install(struct tty_driver *driver, struct tty_struct *tty) if (retval) goto error_get_interface; - retval = tty_standard_install(driver, tty); + retval = tty_port_install(&port->port, driver, tty); if (retval) goto error_init_termios; From 9bb8a3d4109f3b267cca9f6f071e2298eed4f593 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:35 +0200 Subject: [PATCH 034/235] TTY: centralize fail paths in tty_register_driver Currently, some failures are handled in if's false branches, some at the end of tty_register_driver via goto-labels. Let us handle the failures at the end of the functions to have the failure handling at a single place. The only thing needed is to label the lines properly and jump there. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index b425c79675a..d6e045b7079 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3144,10 +3144,8 @@ int tty_register_driver(struct tty_driver *driver) dev = MKDEV(driver->major, driver->minor_start); error = register_chrdev_region(dev, driver->num, driver->name); } - if (error < 0) { - kfree(p); - return error; - } + if (error < 0) + goto err_free_p; if (p) { driver->ttys = (struct tty_struct **)p; @@ -3160,13 +3158,8 @@ int tty_register_driver(struct tty_driver *driver) cdev_init(&driver->cdev, &tty_fops); driver->cdev.owner = driver->owner; error = cdev_add(&driver->cdev, dev, driver->num); - if (error) { - unregister_chrdev_region(dev, driver->num); - driver->ttys = NULL; - driver->termios = NULL; - kfree(p); - return error; - } + if (error) + goto err_unreg_char; mutex_lock(&tty_mutex); list_add(&driver->tty_drivers, &tty_drivers); @@ -3193,13 +3186,14 @@ err: list_del(&driver->tty_drivers); mutex_unlock(&tty_mutex); +err_unreg_char: unregister_chrdev_region(dev, driver->num); driver->ttys = NULL; driver->termios = NULL; +err_free_p: kfree(p); return error; } - EXPORT_SYMBOL(tty_register_driver); /* From 04831dc154df9b83c3e5fd54b18448da507871f7 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:36 +0200 Subject: [PATCH 035/235] TTY: add ports array to tty_driver It will hold tty_port structures for all drivers which do not want to define tty->ops->install hook. We ignore PTY here because it wants 1 million lines and it installs tty_port in ->install anyway. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 18 +++++++++++++++++- include/linux/tty_driver.h | 1 + 2 files changed, 18 insertions(+), 1 deletion(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index d6e045b7079..ac96f74573d 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1407,6 +1407,9 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) if (retval < 0) goto err_deinit_tty; + if (!tty->port) + tty->port = driver->ports[idx]; + /* * Structures all installed ... call the ldisc open routines. * If we fail here just call release_tty to clean up. No need @@ -3094,6 +3097,7 @@ static void destruct_tty_driver(struct kref *kref) kfree(p); cdev_del(&driver->cdev); } + kfree(driver->ports); kfree(driver); } @@ -3132,6 +3136,18 @@ int tty_register_driver(struct tty_driver *driver) if (!p) return -ENOMEM; } + /* + * There is too many lines in PTY and we won't need the array there + * since it has an ->install hook where it assigns ports properly. + */ + if (driver->type != TTY_DRIVER_TYPE_PTY) { + driver->ports = kcalloc(driver->num, sizeof(struct tty_port *), + GFP_KERNEL); + if (!driver->ports) { + error = -ENOMEM; + goto err_free_p; + } + } if (!driver->major) { error = alloc_chrdev_region(&dev, driver->minor_start, @@ -3190,7 +3206,7 @@ err_unreg_char: unregister_chrdev_region(dev, driver->num); driver->ttys = NULL; driver->termios = NULL; -err_free_p: +err_free_p: /* destruct_tty_driver will free driver->ports */ kfree(p); return error; } diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 6e6dbb7447b..04419c141b0 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -313,6 +313,7 @@ struct tty_driver { * Pointer to the tty data structures */ struct tty_struct **ttys; + struct tty_port **ports; struct ktermios **termios; void *driver_state; From 057eb856eda1d957c0f1155eaa90739221f809a7 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 4 Jun 2012 13:35:37 +0200 Subject: [PATCH 036/235] TTY: add tty_port_register_device helper This will automatically assign tty_port to tty_driver's port array for later recall in tty_init_dev. This is intended to be called instead of tty_register_device. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_port.c | 9 +++++++++ include/linux/tty.h | 3 +++ 2 files changed, 12 insertions(+) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 1ac8abf4708..4e9d2b291f4 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -33,6 +33,15 @@ void tty_port_init(struct tty_port *port) } EXPORT_SYMBOL(tty_port_init); +struct device *tty_port_register_device(struct tty_port *port, + struct tty_driver *driver, unsigned index, + struct device *device) +{ + driver->ports[index] = port; + return tty_register_device(driver, index, device); +} +EXPORT_SYMBOL_GPL(tty_port_register_device); + int tty_port_alloc_xmit_buf(struct tty_port *port) { /* We may sleep in get_zeroed_page() */ diff --git a/include/linux/tty.h b/include/linux/tty.h index 45ef71df0e7..40b18d7ad92 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -497,6 +497,9 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay); #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) extern void tty_port_init(struct tty_port *port); +extern struct device *tty_port_register_device(struct tty_port *port, + struct tty_driver *driver, unsigned index, + struct device *device); extern int tty_port_alloc_xmit_buf(struct tty_port *port); extern void tty_port_free_xmit_buf(struct tty_port *port); extern void tty_port_put(struct tty_port *port); From 2fc46915ecfbc51afcf995901f6ade7c3d503a25 Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Mon, 21 May 2012 13:38:42 +0530 Subject: [PATCH 037/235] vt: fix race in vt_waitactive() pm_restore_console() is called from the suspend/resume path, and this calls vt_move_to_console(), which calls vt_waitactive(). There's a race in this path which causes the process which requests the suspend to sleep indefinitely waiting for an event which already happened: P1 P2 vt_move_to_console() set_console() schedule_console_callback() vt_waitactive() check n == fg_console +1 console_callback() switch_screen() vt_event_post() // no waiters vt_event_wait() // forever Fix the race by ensuring we're registered for the event before we check if it's already completed. Signed-off-by: Rabin Vincent Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt_ioctl.c | 55 +++++++++++++++++++++++++++------------ 1 file changed, 38 insertions(+), 17 deletions(-) diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c index 64618547be1..b841f56d2e6 100644 --- a/drivers/tty/vt/vt_ioctl.c +++ b/drivers/tty/vt/vt_ioctl.c @@ -110,6 +110,34 @@ void vt_event_post(unsigned int event, unsigned int old, unsigned int new) wake_up_interruptible(&vt_event_waitqueue); } +static void __vt_event_queue(struct vt_event_wait *vw) +{ + unsigned long flags; + /* Prepare the event */ + INIT_LIST_HEAD(&vw->list); + vw->done = 0; + /* Queue our event */ + spin_lock_irqsave(&vt_event_lock, flags); + list_add(&vw->list, &vt_events); + spin_unlock_irqrestore(&vt_event_lock, flags); +} + +static void __vt_event_wait(struct vt_event_wait *vw) +{ + /* Wait for it to pass */ + wait_event_interruptible(vt_event_waitqueue, vw->done); +} + +static void __vt_event_dequeue(struct vt_event_wait *vw) +{ + unsigned long flags; + + /* Dequeue it */ + spin_lock_irqsave(&vt_event_lock, flags); + list_del(&vw->list); + spin_unlock_irqrestore(&vt_event_lock, flags); +} + /** * vt_event_wait - wait for an event * @vw: our event @@ -121,20 +149,9 @@ void vt_event_post(unsigned int event, unsigned int old, unsigned int new) static void vt_event_wait(struct vt_event_wait *vw) { - unsigned long flags; - /* Prepare the event */ - INIT_LIST_HEAD(&vw->list); - vw->done = 0; - /* Queue our event */ - spin_lock_irqsave(&vt_event_lock, flags); - list_add(&vw->list, &vt_events); - spin_unlock_irqrestore(&vt_event_lock, flags); - /* Wait for it to pass */ - wait_event_interruptible(vt_event_waitqueue, vw->done); - /* Dequeue it */ - spin_lock_irqsave(&vt_event_lock, flags); - list_del(&vw->list); - spin_unlock_irqrestore(&vt_event_lock, flags); + __vt_event_queue(vw); + __vt_event_wait(vw); + __vt_event_dequeue(vw); } /** @@ -177,10 +194,14 @@ int vt_waitactive(int n) { struct vt_event_wait vw; do { - if (n == fg_console + 1) - break; vw.event.event = VT_EVENT_SWITCH; - vt_event_wait(&vw); + __vt_event_queue(&vw); + if (n == fg_console + 1) { + __vt_event_dequeue(&vw); + break; + } + __vt_event_wait(&vw); + __vt_event_dequeue(&vw); if (vw.done == 0) return -EINTR; } while (vw.event.newev != n); From cfe275c2db6932e81ea23288a8a74f0b815c9513 Mon Sep 17 00:00:00 2001 From: Chao Xie Date: Thu, 14 Jun 2012 12:18:46 +0800 Subject: [PATCH 038/235] serial: pxa: add spin lock for console write v3: Remove empty line v2: Move local_irq_save() after clk_prepare_enable() v1: At UP mode, when cpu want to print message in kernel, it will invoke peempt_disable and disable irq. So it is safe for UP mode. For SMP mode, it is not safe to protect the HW reigsters. one CPU will run a program which will invoke printf. another CPU will run a program in kernel that invoke printk. So when second CPU is trying to printk, it will do 1. save ier register 2. enable uue bit of ier register 3. push buffer to uart fifo 4 .restore ier register when first CPU want to printf, and it happens between 1 and 4, it will enable thre bit of ier, and waiting for transmit intterupt. while step 4 will make the ier lost thre bit. add spin lock here to protect the ier register for console write. Signed-off-by: Chao Xie Signed-off-by: Haojian Zhuang Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pxa.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/tty/serial/pxa.c b/drivers/tty/serial/pxa.c index 5847a4b855f..9033fc6e0e4 100644 --- a/drivers/tty/serial/pxa.c +++ b/drivers/tty/serial/pxa.c @@ -670,9 +670,19 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count) { struct uart_pxa_port *up = serial_pxa_ports[co->index]; unsigned int ier; + unsigned long flags; + int locked = 1; clk_prepare_enable(up->clk); + local_irq_save(flags); + if (up->port.sysrq) + locked = 0; + else if (oops_in_progress) + locked = spin_trylock(&up->port.lock); + else + spin_lock(&up->port.lock); + /* * First save the IER then disable the interrupts */ @@ -688,6 +698,10 @@ serial_pxa_console_write(struct console *co, const char *s, unsigned int count) wait_for_xmitr(up); serial_out(up, UART_IER, ier); + if (locked) + spin_unlock(&up->port.lock); + local_irq_restore(flags); + clk_disable_unprepare(up->clk); } From e643f87f714c430062c634b5acd69a3a52279e51 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sun, 17 Jun 2012 15:44:19 +0200 Subject: [PATCH 039/235] serial/amba-pl011: fix ages old copy-paste errors The PL011 driver has a number of symbols referring to "pl01x" (probably once shared with the pl010 driver) and some even named "pl010" (probably a pure copy-paste artifact). Lets name all local static functions with the prefix pl011_* for clarity. Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 34 ++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 4ad721fb840..314664829e7 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1211,14 +1211,14 @@ static irqreturn_t pl011_int(int irq, void *dev_id) return IRQ_RETVAL(handled); } -static unsigned int pl01x_tx_empty(struct uart_port *port) +static unsigned int pl011_tx_empty(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; unsigned int status = readw(uap->port.membase + UART01x_FR); return status & (UART01x_FR_BUSY|UART01x_FR_TXFF) ? 0 : TIOCSER_TEMT; } -static unsigned int pl01x_get_mctrl(struct uart_port *port) +static unsigned int pl011_get_mctrl(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; unsigned int result = 0; @@ -1281,7 +1281,7 @@ static void pl011_break_ctl(struct uart_port *port, int break_state) } #ifdef CONFIG_CONSOLE_POLL -static int pl010_get_poll_char(struct uart_port *port) +static int pl011_get_poll_char(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; unsigned int status; @@ -1293,7 +1293,7 @@ static int pl010_get_poll_char(struct uart_port *port) return readw(uap->port.membase + UART01x_DR); } -static void pl010_put_poll_char(struct uart_port *port, +static void pl011_put_poll_char(struct uart_port *port, unsigned char ch) { struct uart_amba_port *uap = (struct uart_amba_port *)port; @@ -1616,7 +1616,7 @@ static const char *pl011_type(struct uart_port *port) /* * Release the memory region(s) being used by 'port' */ -static void pl010_release_port(struct uart_port *port) +static void pl011_release_port(struct uart_port *port) { release_mem_region(port->mapbase, SZ_4K); } @@ -1624,7 +1624,7 @@ static void pl010_release_port(struct uart_port *port) /* * Request the memory region(s) being used by 'port' */ -static int pl010_request_port(struct uart_port *port) +static int pl011_request_port(struct uart_port *port) { return request_mem_region(port->mapbase, SZ_4K, "uart-pl011") != NULL ? 0 : -EBUSY; @@ -1633,18 +1633,18 @@ static int pl010_request_port(struct uart_port *port) /* * Configure/autoconfigure the port. */ -static void pl010_config_port(struct uart_port *port, int flags) +static void pl011_config_port(struct uart_port *port, int flags) { if (flags & UART_CONFIG_TYPE) { port->type = PORT_AMBA; - pl010_request_port(port); + pl011_request_port(port); } } /* * verify the new serial_struct (for TIOCSSERIAL). */ -static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser) +static int pl011_verify_port(struct uart_port *port, struct serial_struct *ser) { int ret = 0; if (ser->type != PORT_UNKNOWN && ser->type != PORT_AMBA) @@ -1657,9 +1657,9 @@ static int pl010_verify_port(struct uart_port *port, struct serial_struct *ser) } static struct uart_ops amba_pl011_pops = { - .tx_empty = pl01x_tx_empty, + .tx_empty = pl011_tx_empty, .set_mctrl = pl011_set_mctrl, - .get_mctrl = pl01x_get_mctrl, + .get_mctrl = pl011_get_mctrl, .stop_tx = pl011_stop_tx, .start_tx = pl011_start_tx, .stop_rx = pl011_stop_rx, @@ -1670,13 +1670,13 @@ static struct uart_ops amba_pl011_pops = { .flush_buffer = pl011_dma_flush_buffer, .set_termios = pl011_set_termios, .type = pl011_type, - .release_port = pl010_release_port, - .request_port = pl010_request_port, - .config_port = pl010_config_port, - .verify_port = pl010_verify_port, + .release_port = pl011_release_port, + .request_port = pl011_request_port, + .config_port = pl011_config_port, + .verify_port = pl011_verify_port, #ifdef CONFIG_CONSOLE_POLL - .poll_get_char = pl010_get_poll_char, - .poll_put_char = pl010_put_poll_char, + .poll_get_char = pl011_get_poll_char, + .poll_put_char = pl011_put_poll_char, #endif }; From fe89def79c48e2149abdd1e816523e69a9067191 Mon Sep 17 00:00:00 2001 From: Darren Hart Date: Tue, 19 Jun 2012 14:00:18 -0700 Subject: [PATCH 040/235] pch_uart: Add eg20t_port lock field, avoid recursive spinlocks pch_uart_interrupt() takes priv->port.lock which leads to two recursive spinlock calls if low_latency==1 or CONFIG_PREEMPT_RT_FULL=y (one otherwise): pch_uart_interrupt spin_lock_irqsave(priv->port.lock, flags) case PCH_UART_IID_RDR_TO (data ready) handle_rx_to push_rx tty_port_tty_get spin_lock_irqsave(&port->lock, flags) <--- already hold this lock ... tty_flip_buffer_push ... flush_to_ldisc spin_lock_irqsave(&tty->buf.lock) spin_lock_irqsave(&tty->buf.lock) disc->ops->receive_buf(tty, char_buf) n_tty_receive_buf tty->ops->flush_chars() uart_flush_chars uart_start spin_lock_irqsave(&port->lock) <--- already hold this lock Avoid this by using a dedicated lock to protect the eg20t_port structure and IO access to its membase. This is more consistent with the 8250 driver. Ensure priv->lock is always take prior to priv->port.lock when taken at the same time. V2: Remove inadvertent whitespace change. V3: Account for oops_in_progress for the private lock in pch_console_write(). Note: Like the 8250 driver, if a printk is introduced anywhere inside the pch_console_write() critical section, the kernel will hang on a recursive spinlock on the private lock. The oops case is handled by using a trylock in the oops_in_progress case. Signed-off-by: Darren Hart CC: Tomoya MORINAGA CC: Feng Tang CC: Alexander Stein Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 38 ++++++++++++++++++++++++----------- 1 file changed, 26 insertions(+), 12 deletions(-) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 4fdec6a6b75..d291518a58a 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -253,6 +253,9 @@ struct eg20t_port { dma_addr_t rx_buf_dma; struct dentry *debugfs; + + /* protect the eg20t_port private structure and io access to membase */ + spinlock_t lock; }; /** @@ -1058,7 +1061,7 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id) int next = 1; u8 msr; - spin_lock_irqsave(&priv->port.lock, flags); + spin_lock_irqsave(&priv->lock, flags); handled = 0; while (next) { iid = pch_uart_hal_get_iid(priv); @@ -1116,7 +1119,7 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id) handled |= (unsigned int)ret; } - spin_unlock_irqrestore(&priv->port.lock, flags); + spin_unlock_irqrestore(&priv->lock, flags); return IRQ_RETVAL(handled); } @@ -1226,9 +1229,9 @@ static void pch_uart_break_ctl(struct uart_port *port, int ctl) unsigned long flags; priv = container_of(port, struct eg20t_port, port); - spin_lock_irqsave(&port->lock, flags); + spin_lock_irqsave(&priv->lock, flags); pch_uart_hal_set_break(priv, ctl); - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock_irqrestore(&priv->lock, flags); } /* Grab any interrupt resources and initialise any low level driver state. */ @@ -1376,7 +1379,8 @@ static void pch_uart_set_termios(struct uart_port *port, baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - spin_lock_irqsave(&port->lock, flags); + spin_lock_irqsave(&priv->lock, flags); + spin_lock(&port->lock); uart_update_timeout(port, termios->c_cflag, baud); rtn = pch_uart_hal_set_line(priv, baud, parity, bits, stb); @@ -1389,7 +1393,8 @@ static void pch_uart_set_termios(struct uart_port *port, tty_termios_encode_baud_rate(termios, baud, baud); out: - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock(&port->lock); + spin_unlock_irqrestore(&priv->lock, flags); } static const char *pch_uart_type(struct uart_port *port) @@ -1538,8 +1543,9 @@ pch_console_write(struct console *co, const char *s, unsigned int count) { struct eg20t_port *priv; unsigned long flags; + int priv_locked = 1; + int port_locked = 1; u8 ier; - int locked = 1; priv = pch_uart_ports[co->index]; @@ -1547,12 +1553,16 @@ pch_console_write(struct console *co, const char *s, unsigned int count) local_irq_save(flags); if (priv->port.sysrq) { - /* serial8250_handle_port() already took the lock */ - locked = 0; + spin_lock(&priv->lock); + /* serial8250_handle_port() already took the port lock */ + port_locked = 0; } else if (oops_in_progress) { - locked = spin_trylock(&priv->port.lock); - } else + priv_locked = spin_trylock(&priv->lock); + port_locked = spin_trylock(&priv->port.lock); + } else { + spin_lock(&priv->lock); spin_lock(&priv->port.lock); + } /* * First save the IER then disable the interrupts @@ -1570,8 +1580,10 @@ pch_console_write(struct console *co, const char *s, unsigned int count) wait_for_xmitr(priv, BOTH_EMPTY); iowrite8(ier, priv->membase + UART_IER); - if (locked) + if (port_locked) spin_unlock(&priv->port.lock); + if (priv_locked) + spin_unlock(&priv->lock); local_irq_restore(flags); } @@ -1669,6 +1681,8 @@ static struct eg20t_port *pch_uart_init_port(struct pci_dev *pdev, pci_enable_msi(pdev); pci_set_master(pdev); + spin_lock_init(&priv->lock); + iobase = pci_resource_start(pdev, 0); mapbase = pci_resource_start(pdev, 1); priv->mapbase = mapbase; From 0a44ab41eb833d07e3ec807d87151c7164d4f075 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 22 Jun 2012 16:40:20 +0100 Subject: [PATCH 041/235] tty: note race we need to fix This was identified by Vincent Pillet with a high speed interface that uses low latency mode. In the low latency case we have a tiny race but it can be hit. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_tty.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index ee1c268f5f9..4f34491b65c 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1432,6 +1432,12 @@ static void n_tty_receive_buf(struct tty_struct *tty, const unsigned char *cp, */ if (tty->receive_room < TTY_THRESHOLD_THROTTLE) tty_throttle(tty); + + /* FIXME: there is a tiny race here if the receive room check runs + before the other work executes and empties the buffer (upping + the receiving room and unthrottling. We then throttle and get + stuck. This has been observed and traced down by Vincent Pillet/ + We need to address this when we sort out out the rx path locking */ } int is_ignored(int sig) From f5e3bcc504c3c35cc6e06a9ee42efed7c274066b Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 29 Jun 2012 14:48:36 +0100 Subject: [PATCH 042/235] tty: localise the lock The termios and other changes mean the other protections needed on the driver tty arrays should be adequate. Turn it all back on. This contains pieces folded in from the fixes made to the original patches | From: Geert Uytterhoeven (fix m68k) | From: Paul Gortmaker (fix cris) | From: Jiri Kosina (lockdep) | From: Eric Dumazet (lockdep) Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 14 +++---- drivers/tty/cyclades.c | 2 +- drivers/tty/n_r3964.c | 10 ++--- drivers/tty/pty.c | 27 ++++++++------ drivers/tty/serial/crisv10.c | 8 ++-- drivers/tty/synclink.c | 4 +- drivers/tty/synclink_gt.c | 4 +- drivers/tty/synclinkmp.c | 4 +- drivers/tty/tty_io.c | 67 ++++++++++++++++++++-------------- drivers/tty/tty_ldisc.c | 67 +++++++++++++++++++--------------- drivers/tty/tty_mutex.c | 71 ++++++++++++++++++++++++++++-------- drivers/tty/tty_port.c | 6 +-- include/linux/tty.h | 23 +++++++----- net/bluetooth/rfcomm/tty.c | 4 +- 14 files changed, 191 insertions(+), 120 deletions(-) diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 6cc4358f68c..35819e31262 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1033,7 +1033,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); - tty_lock(); + tty_lock(tty); tmp.line = tty->index; tmp.port = state->port; tmp.flags = state->tport.flags; @@ -1042,7 +1042,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, tmp.close_delay = state->tport.close_delay; tmp.closing_wait = state->tport.closing_wait; tmp.custom_divisor = state->custom_divisor; - tty_unlock(); + tty_unlock(tty); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1059,12 +1059,12 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) return -EFAULT; - tty_lock(); + tty_lock(tty); change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) || new_serial.custom_divisor != state->custom_divisor; if (new_serial.irq || new_serial.port != state->port || new_serial.xmit_fifo_size != state->xmit_fifo_size) { - tty_unlock(); + tty_unlock(tty); return -EINVAL; } @@ -1074,7 +1074,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, (new_serial.xmit_fifo_size != state->xmit_fifo_size) || ((new_serial.flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) { - tty_unlock(); + tty_unlock(tty); return -EPERM; } port->flags = ((port->flags & ~ASYNC_USR_MASK) | @@ -1084,7 +1084,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, } if (new_serial.baud_base < 9600) { - tty_unlock(); + tty_unlock(tty); return -EINVAL; } @@ -1116,7 +1116,7 @@ check_and_exit: } } else retval = startup(tty, state); - tty_unlock(); + tty_unlock(tty); return retval; } diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index cff546839db..69e9ca2dd4b 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1599,7 +1599,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp) * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->port.close_wait, + wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 5c6c31459a2..1e6405070ce 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -1065,7 +1065,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, TRACE_L("read()"); - tty_lock(); + tty_lock(tty); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1077,7 +1077,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, goto unlock; } /* block until there is a message: */ - wait_event_interruptible_tty(pInfo->read_wait, + wait_event_interruptible_tty(tty, pInfo->read_wait, (pMsg = remove_msg(pInfo, pClient))); } @@ -1107,7 +1107,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, } ret = -EPERM; unlock: - tty_unlock(); + tty_unlock(tty); return ret; } @@ -1156,7 +1156,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, pHeader->locks = 0; pHeader->owner = NULL; - tty_lock(); + tty_lock(tty); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1175,7 +1175,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, add_tx_queue(pInfo, pHeader); trigger_transmit(pInfo); - tty_unlock(); + tty_unlock(tty); return 0; } diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index b50fc1c0141..d8558834ce5 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -47,6 +47,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp) wake_up_interruptible(&tty->read_wait); wake_up_interruptible(&tty->write_wait); tty->packet = 0; + /* Review - krefs on tty_link ?? */ if (!tty->link) return; tty->link->packet = 0; @@ -62,9 +63,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&devpts_mutex); } #endif - tty_unlock(); + tty_unlock(tty); tty_vhangup(tty->link); - tty_lock(); + tty_lock(tty); } } @@ -615,26 +616,27 @@ static int ptmx_open(struct inode *inode, struct file *filp) return retval; /* find a device that is not in use. */ - tty_lock(); + mutex_lock(&devpts_mutex); index = devpts_new_index(inode); - tty_unlock(); if (index < 0) { retval = index; goto err_file; } - mutex_lock(&tty_mutex); - mutex_lock(&devpts_mutex); - tty = tty_init_dev(ptm_driver, index); mutex_unlock(&devpts_mutex); - tty_lock(); - mutex_unlock(&tty_mutex); + + mutex_lock(&tty_mutex); + tty = tty_init_dev(ptm_driver, index); if (IS_ERR(tty)) { retval = PTR_ERR(tty); goto out; } + /* The tty returned here is locked so we can safely + drop the mutex */ + mutex_unlock(&tty_mutex); + set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */ tty_add_file(tty, filp); @@ -647,16 +649,17 @@ static int ptmx_open(struct inode *inode, struct file *filp) if (retval) goto err_release; - tty_unlock(); + tty_unlock(tty); return 0; err_release: - tty_unlock(); + tty_unlock(tty); tty_release(inode, filp); return retval; out: + mutex_unlock(&tty_mutex); devpts_kill_index(inode, index); - tty_unlock(); err_file: + mutex_unlock(&devpts_mutex); tty_free_file(filp); return retval; } diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 80b6b1b1f72..7264d4d2671 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -3976,7 +3976,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, + wait_event_interruptible_tty(tty, info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART if (info->flags & ASYNC_HUP_NOTIFY) @@ -4052,9 +4052,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttyS%d, count = %d\n", info->line, info->count); #endif - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); @@ -4115,7 +4115,7 @@ rs_open(struct tty_struct *tty, struct file * filp) */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, + wait_event_interruptible_tty(tty, info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART return ((info->flags & ASYNC_HUP_NOTIFY) ? diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 593d40ad0a6..5ed0daae656 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3338,9 +3338,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("%s(%d):block_til_ready blocking on %s count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index aa1debf97cc..45b43f11ca3 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3336,9 +3336,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } DBGINFO(("%s block_til_ready wait\n", tty->driver->name)); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index a3dddc12d2f..4a1e4f07765 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -3357,9 +3357,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, printk("%s(%d):%s block_til_ready() count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index ac96f74573d..ca7c25d9f6d 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -185,6 +185,7 @@ void free_tty_struct(struct tty_struct *tty) put_device(tty->dev); kfree(tty->write_buf); tty_buffer_free_all(tty); + tty->magic = 0xDEADDEAD; kfree(tty); } @@ -573,7 +574,7 @@ void __tty_hangup(struct tty_struct *tty) } spin_unlock(&redirect_lock); - tty_lock(); + tty_lock(tty); /* some functions below drop BTM, so we need this bit */ set_bit(TTY_HUPPING, &tty->flags); @@ -666,7 +667,7 @@ void __tty_hangup(struct tty_struct *tty) clear_bit(TTY_HUPPING, &tty->flags); tty_ldisc_enable(tty); - tty_unlock(); + tty_unlock(tty); if (f) fput(f); @@ -1103,12 +1104,12 @@ void tty_write_message(struct tty_struct *tty, char *msg) { if (tty) { mutex_lock(&tty->atomic_write_lock); - tty_lock(); + tty_lock(tty); if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) { - tty_unlock(); + tty_unlock(tty); tty->ops->write(tty, msg, strlen(msg)); } else - tty_unlock(); + tty_unlock(tty); tty_write_unlock(tty); } return; @@ -1403,6 +1404,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) } initialize_tty_struct(tty, driver, idx); + tty_lock(tty); retval = tty_driver_install_tty(driver, tty); if (retval < 0) goto err_deinit_tty; @@ -1418,9 +1420,11 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) retval = tty_ldisc_setup(tty, tty->link); if (retval) goto err_release_tty; + /* Return the tty locked so that it cannot vanish under the caller */ return tty; err_deinit_tty: + tty_unlock(tty); deinitialize_tty_struct(tty); free_tty_struct(tty); err_module_put: @@ -1429,6 +1433,7 @@ err_module_put: /* call the tty release_tty routine to clean out this slot */ err_release_tty: + tty_unlock(tty); printk_ratelimited(KERN_INFO "tty_init_dev: ldisc open failed, " "clearing slot %d\n", idx); release_tty(tty, idx); @@ -1631,7 +1636,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty_paranoia_check(tty, inode, __func__)) return 0; - tty_lock(); + tty_lock(tty); check_tty_count(tty, __func__); __tty_fasync(-1, filp, 0); @@ -1640,10 +1645,11 @@ int tty_release(struct inode *inode, struct file *filp) pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY && tty->driver->subtype == PTY_TYPE_MASTER); devpts = (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM) != 0; + /* Review: parallel close */ o_tty = tty->link; if (tty_release_checks(tty, o_tty, idx)) { - tty_unlock(); + tty_unlock(tty); return 0; } @@ -1655,7 +1661,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->ops->close) tty->ops->close(tty, filp); - tty_unlock(); + tty_unlock(tty); /* * Sanity check: if tty->count is going to zero, there shouldn't be * any waiters on tty->read_wait or tty->write_wait. We test the @@ -1678,7 +1684,7 @@ int tty_release(struct inode *inode, struct file *filp) opens on /dev/tty */ mutex_lock(&tty_mutex); - tty_lock(); + tty_lock_pair(tty, o_tty); tty_closing = tty->count <= 1; o_tty_closing = o_tty && (o_tty->count <= (pty_master ? 1 : 0)); @@ -1709,7 +1715,7 @@ int tty_release(struct inode *inode, struct file *filp) printk(KERN_WARNING "%s: %s: read/write wait queue active!\n", __func__, tty_name(tty, buf)); - tty_unlock(); + tty_unlock_pair(tty, o_tty); mutex_unlock(&tty_mutex); schedule(); } @@ -1772,7 +1778,7 @@ int tty_release(struct inode *inode, struct file *filp) /* check whether both sides are closing ... */ if (!tty_closing || (o_tty && !o_tty_closing)) { - tty_unlock(); + tty_unlock_pair(tty, o_tty); return 0; } @@ -1785,14 +1791,16 @@ int tty_release(struct inode *inode, struct file *filp) tty_ldisc_release(tty, o_tty); /* * The release_tty function takes care of the details of clearing - * the slots and preserving the termios structure. + * the slots and preserving the termios structure. The tty_unlock_pair + * should be safe as we keep a kref while the tty is locked (so the + * unlock never unlocks a freed tty). */ release_tty(tty, idx); + tty_unlock_pair(tty, o_tty); /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); - tty_unlock(); return 0; } @@ -1896,6 +1904,9 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp, * Locking: tty_mutex protects tty, tty_lookup_driver and tty_init_dev. * tty->count should protect the rest. * ->siglock protects ->signal/->sighand + * + * Note: the tty_unlock/lock cases without a ref are only safe due to + * tty_mutex */ static int tty_open(struct inode *inode, struct file *filp) @@ -1919,8 +1930,7 @@ retry_open: retval = 0; mutex_lock(&tty_mutex); - tty_lock(); - + /* This is protected by the tty_mutex */ tty = tty_open_current_tty(device, filp); if (IS_ERR(tty)) { retval = PTR_ERR(tty); @@ -1941,17 +1951,19 @@ retry_open: } if (tty) { + tty_lock(tty); retval = tty_reopen(tty); - if (retval) + if (retval < 0) { + tty_unlock(tty); tty = ERR_PTR(retval); - } else + } + } else /* Returns with the tty_lock held for now */ tty = tty_init_dev(driver, index); mutex_unlock(&tty_mutex); if (driver) tty_driver_kref_put(driver); if (IS_ERR(tty)) { - tty_unlock(); retval = PTR_ERR(tty); goto err_file; } @@ -1980,7 +1992,7 @@ retry_open: printk(KERN_DEBUG "%s: error %d in opening %s...\n", __func__, retval, tty->name); #endif - tty_unlock(); /* need to call tty_release without BTM */ + tty_unlock(tty); /* need to call tty_release without BTM */ tty_release(inode, filp); if (retval != -ERESTARTSYS) return retval; @@ -1992,17 +2004,15 @@ retry_open: /* * Need to reset f_op in case a hangup happened. */ - tty_lock(); if (filp->f_op == &hung_up_tty_fops) filp->f_op = &tty_fops; - tty_unlock(); goto retry_open; } - tty_unlock(); + tty_unlock(tty); mutex_lock(&tty_mutex); - tty_lock(); + tty_lock(tty); spin_lock_irq(¤t->sighand->siglock); if (!noctty && current->signal->leader && @@ -2010,11 +2020,10 @@ retry_open: tty->session == NULL) __proc_set_tty(current, tty); spin_unlock_irq(¤t->sighand->siglock); - tty_unlock(); + tty_unlock(tty); mutex_unlock(&tty_mutex); return 0; err_unlock: - tty_unlock(); mutex_unlock(&tty_mutex); /* after locks to avoid deadlock */ if (!IS_ERR_OR_NULL(driver)) @@ -2097,10 +2106,13 @@ out: static int tty_fasync(int fd, struct file *filp, int on) { + struct tty_struct *tty = file_tty(filp); int retval; - tty_lock(); + + tty_lock(tty); retval = __tty_fasync(fd, filp, on); - tty_unlock(); + tty_unlock(tty); + return retval; } @@ -2937,6 +2949,7 @@ void initialize_tty_struct(struct tty_struct *tty, tty->pgrp = NULL; tty->overrun_time = jiffies; tty_buffer_init(tty); + mutex_init(&tty->legacy_mutex); mutex_init(&tty->termios_mutex); mutex_init(&tty->ldisc_mutex); init_waitqueue_head(&tty->write_wait); diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 9911eb6b34c..ba8be396a62 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -568,7 +568,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) if (IS_ERR(new_ldisc)) return PTR_ERR(new_ldisc); - tty_lock(); + tty_lock(tty); /* * We need to look at the tty locking here for pty/tty pairs * when both sides try to change in parallel. @@ -582,12 +582,12 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) */ if (tty->ldisc->ops->num == ldisc) { - tty_unlock(); + tty_unlock(tty); tty_ldisc_put(new_ldisc); return 0; } - tty_unlock(); + tty_unlock(tty); /* * Problem: What do we do if this blocks ? * We could deadlock here @@ -595,7 +595,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) tty_wait_until_sent(tty, 0); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* @@ -605,10 +605,10 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) while (test_bit(TTY_LDISC_CHANGING, &tty->flags)) { mutex_unlock(&tty->ldisc_mutex); - tty_unlock(); + tty_unlock(tty); wait_event(tty_ldisc_wait, test_bit(TTY_LDISC_CHANGING, &tty->flags) == 0); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); } @@ -623,7 +623,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) o_ldisc = tty->ldisc; - tty_unlock(); + tty_unlock(tty); /* * Make sure we don't change while someone holds a * reference to the line discipline. The TTY_LDISC bit @@ -650,7 +650,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) retval = tty_ldisc_wait_idle(tty, 5 * HZ); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* handle wait idle failure locked */ @@ -665,7 +665,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) clear_bit(TTY_LDISC_CHANGING, &tty->flags); mutex_unlock(&tty->ldisc_mutex); tty_ldisc_put(new_ldisc); - tty_unlock(); + tty_unlock(tty); return -EIO; } @@ -708,7 +708,7 @@ enable: if (o_work) schedule_work(&o_tty->buf.work); mutex_unlock(&tty->ldisc_mutex); - tty_unlock(); + tty_unlock(tty); return retval; } @@ -816,11 +816,11 @@ void tty_ldisc_hangup(struct tty_struct *tty) * need to wait for another function taking the BTM */ clear_bit(TTY_LDISC, &tty->flags); - tty_unlock(); + tty_unlock(tty); cancel_work_sync(&tty->buf.work); mutex_unlock(&tty->ldisc_mutex); retry: - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* At this point we have a closed ldisc and we want to @@ -831,7 +831,7 @@ retry: if (atomic_read(&tty->ldisc->users) != 1) { char cur_n[TASK_COMM_LEN], tty_n[64]; long timeout = 3 * HZ; - tty_unlock(); + tty_unlock(tty); while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) { timeout = MAX_SCHEDULE_TIMEOUT; @@ -894,6 +894,23 @@ int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty) tty_ldisc_enable(tty); return 0; } + +static void tty_ldisc_kill(struct tty_struct *tty) +{ + mutex_lock(&tty->ldisc_mutex); + /* + * Now kill off the ldisc + */ + tty_ldisc_close(tty, tty->ldisc); + tty_ldisc_put(tty->ldisc); + /* Force an oops if we mess this up */ + tty->ldisc = NULL; + + /* Ensure the next open requests the N_TTY ldisc */ + tty_set_termios_ldisc(tty, N_TTY); + mutex_unlock(&tty->ldisc_mutex); +} + /** * tty_ldisc_release - release line discipline * @tty: tty being shut down @@ -912,27 +929,19 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) * race with the set_ldisc code path. */ - tty_unlock(); + tty_unlock_pair(tty, o_tty); tty_ldisc_halt(tty); tty_ldisc_flush_works(tty); - tty_lock(); + if (o_tty) { + tty_ldisc_halt(o_tty); + tty_ldisc_flush_works(o_tty); + } + tty_lock_pair(tty, o_tty); - mutex_lock(&tty->ldisc_mutex); - /* - * Now kill off the ldisc - */ - tty_ldisc_close(tty, tty->ldisc); - tty_ldisc_put(tty->ldisc); - /* Force an oops if we mess this up */ - tty->ldisc = NULL; - /* Ensure the next open requests the N_TTY ldisc */ - tty_set_termios_ldisc(tty, N_TTY); - mutex_unlock(&tty->ldisc_mutex); - - /* This will need doing differently if we need to lock */ + tty_ldisc_kill(tty); if (o_tty) - tty_ldisc_release(o_tty, NULL); + tty_ldisc_kill(o_tty); /* And the memory resources remaining (buffers, termios) will be disposed of when the kref hits zero */ diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 9ff986c32a2..67feac9e6eb 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -4,29 +4,70 @@ #include #include -/* - * The 'big tty mutex' - * - * This mutex is taken and released by tty_lock() and tty_unlock(), - * replacing the older big kernel lock. - * It can no longer be taken recursively, and does not get - * released implicitly while sleeping. - * - * Don't use in new code. - */ -static DEFINE_MUTEX(big_tty_mutex); +/* Legacy tty mutex glue */ + +enum { + TTY_MUTEX_NORMAL, + TTY_MUTEX_NESTED, +}; /* * Getting the big tty mutex. */ -void __lockfunc tty_lock(void) + +static void __lockfunc tty_lock_nested(struct tty_struct *tty, + unsigned int subclass) { - mutex_lock(&big_tty_mutex); + if (tty->magic != TTY_MAGIC) { + printk(KERN_ERR "L Bad %p\n", tty); + WARN_ON(1); + return; + } + tty_kref_get(tty); + mutex_lock_nested(&tty->legacy_mutex, subclass); +} + +void __lockfunc tty_lock(struct tty_struct *tty) +{ + return tty_lock_nested(tty, TTY_MUTEX_NORMAL); } EXPORT_SYMBOL(tty_lock); -void __lockfunc tty_unlock(void) +void __lockfunc tty_unlock(struct tty_struct *tty) { - mutex_unlock(&big_tty_mutex); + if (tty->magic != TTY_MAGIC) { + printk(KERN_ERR "U Bad %p\n", tty); + WARN_ON(1); + return; + } + mutex_unlock(&tty->legacy_mutex); + tty_kref_put(tty); } EXPORT_SYMBOL(tty_unlock); + +/* + * Getting the big tty mutex for a pair of ttys with lock ordering + * On a non pty/tty pair tty2 can be NULL which is just fine. + */ +void __lockfunc tty_lock_pair(struct tty_struct *tty, + struct tty_struct *tty2) +{ + if (tty < tty2) { + tty_lock(tty); + tty_lock_nested(tty2, TTY_MUTEX_NESTED); + } else { + if (tty2 && tty2 != tty) + tty_lock(tty2); + tty_lock_nested(tty, TTY_MUTEX_NESTED); + } +} +EXPORT_SYMBOL(tty_lock_pair); + +void __lockfunc tty_unlock_pair(struct tty_struct *tty, + struct tty_struct *tty2) +{ + tty_unlock(tty); + if (tty2 && tty2 != tty) + tty_unlock(tty2); +} +EXPORT_SYMBOL(tty_unlock_pair); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 4e9d2b291f4..a3ba776c574 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -239,7 +239,7 @@ int tty_port_block_til_ready(struct tty_port *port, /* block if port is in the process of being closed */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { - wait_event_interruptible_tty(port->close_wait, + wait_event_interruptible_tty(tty, port->close_wait, !(port->flags & ASYNC_CLOSING)); if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; @@ -305,9 +305,9 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } finish_wait(&port->open_wait, &wait); diff --git a/include/linux/tty.h b/include/linux/tty.h index 40b18d7ad92..7f9d7df9b13 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -268,6 +268,7 @@ struct tty_struct { struct mutex ldisc_mutex; struct tty_ldisc *ldisc; + struct mutex legacy_mutex; struct mutex termios_mutex; spinlock_t ctrl_lock; /* Termios values are protected by the termios mutex */ @@ -610,8 +611,12 @@ extern long vt_compat_ioctl(struct tty_struct *tty, /* tty_mutex.c */ /* functions for preparation of BKL removal */ -extern void __lockfunc tty_lock(void) __acquires(tty_lock); -extern void __lockfunc tty_unlock(void) __releases(tty_lock); +extern void __lockfunc tty_lock(struct tty_struct *tty); +extern void __lockfunc tty_unlock(struct tty_struct *tty); +extern void __lockfunc tty_lock_pair(struct tty_struct *tty, + struct tty_struct *tty2); +extern void __lockfunc tty_unlock_pair(struct tty_struct *tty, + struct tty_struct *tty2); /* * this shall be called only from where BTM is held (like close) @@ -626,9 +631,9 @@ extern void __lockfunc tty_unlock(void) __releases(tty_lock); static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, long timeout) { - tty_unlock(); /* tty->ops->close holds the BTM, drop it while waiting */ + tty_unlock(tty); /* tty->ops->close holds the BTM, drop it while waiting */ tty_wait_until_sent(tty, timeout); - tty_lock(); + tty_lock(tty); } /* @@ -643,16 +648,16 @@ static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, * * Do not use in new code. */ -#define wait_event_interruptible_tty(wq, condition) \ +#define wait_event_interruptible_tty(tty, wq, condition) \ ({ \ int __ret = 0; \ if (!(condition)) { \ - __wait_event_interruptible_tty(wq, condition, __ret); \ + __wait_event_interruptible_tty(tty, wq, condition, __ret); \ } \ __ret; \ }) -#define __wait_event_interruptible_tty(wq, condition, ret) \ +#define __wait_event_interruptible_tty(tty, wq, condition, ret) \ do { \ DEFINE_WAIT(__wait); \ \ @@ -661,9 +666,9 @@ do { \ if (condition) \ break; \ if (!signal_pending(current)) { \ - tty_unlock(); \ + tty_unlock(tty); \ schedule(); \ - tty_lock(); \ + tty_lock(tty); \ continue; \ } \ ret = -ERESTARTSYS; \ diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index d1820ff14ae..aa5d73b786a 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -710,9 +710,9 @@ static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) break; } - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); remove_wait_queue(&dev->wait, &wait); From 157a4b311c45c9aba75a990464d9680867dc8805 Mon Sep 17 00:00:00 2001 From: Christopher Brannon Date: Fri, 22 Jun 2012 08:16:34 -0500 Subject: [PATCH 043/235] tty: keyboard.c: Remove locking from vt_get_leds. There are three call sites for this function, and all three are called within a keyboard handler. kbd_event_lock is already held within keyboard handlers, so attempting to lock it in vt_get_leds causes deadlock. Signed-off-by: Christopher Brannon Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/keyboard.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index 0b6217c9303..9b4f60a6ab0 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -1049,13 +1049,10 @@ static int kbd_update_leds_helper(struct input_handle *handle, void *data) */ int vt_get_leds(int console, int flag) { - unsigned long flags; struct kbd_struct * kbd = kbd_table + console; int ret; - spin_lock_irqsave(&kbd_event_lock, flags); ret = vc_kbd_led(kbd, flag); - spin_unlock_irqrestore(&kbd_event_lock, flags); return ret; } From 79d753209245de3d6f02480535a8f5cf21ad02f7 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Wed, 11 Jul 2012 09:40:40 +0300 Subject: [PATCH 044/235] tty: double unlock on error in ptmx_open() The problem here is that we called mutex_unlock(&devpts_mutex) on the error path when we weren't holding the lock. Signed-off-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d8558834ce5..a0ca0830cbc 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -618,13 +618,12 @@ static int ptmx_open(struct inode *inode, struct file *filp) /* find a device that is not in use. */ mutex_lock(&devpts_mutex); index = devpts_new_index(inode); + mutex_unlock(&devpts_mutex); if (index < 0) { retval = index; goto err_file; } - mutex_unlock(&devpts_mutex); - mutex_lock(&tty_mutex); tty = tty_init_dev(ptm_driver, index); @@ -659,7 +658,6 @@ out: mutex_unlock(&tty_mutex); devpts_kill_index(inode, index); err_file: - mutex_unlock(&devpts_mutex); tty_free_file(filp); return retval; } From 000c74d9fa14ec61411310187cfa9e43581593b5 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 12 Jul 2012 12:59:17 +0100 Subject: [PATCH 045/235] usb: fix sillies in the metro USB driver Bits noticed doing the termios conversion Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/metro-usb.c | 8 +------- 1 file changed, 1 insertion(+), 7 deletions(-) diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 81423f7361d..bad5f0cb7ae 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -130,20 +130,14 @@ static void metrousb_read_int_callback(struct urb *urb) /* Set the data read from the usb port into the serial port buffer. */ tty = tty_port_tty_get(&port->port); - if (!tty) { - dev_err(&port->dev, "%s - bad tty pointer - exiting\n", - __func__); - return; - } - if (tty && urb->actual_length) { /* Loop through the data copying each byte to the tty layer. */ tty_insert_flip_string(tty, data, urb->actual_length); /* Force the data to the tty layer. */ tty_flip_buffer_push(tty); + tty_kref_put(tty); } - tty_kref_put(tty); /* Set any port variables. */ spin_lock_irqsave(&metro_priv->lock, flags); From 2655a2c76f80d91da34faa8f4e114d1793435ed3 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 12 Jul 2012 12:59:50 +0100 Subject: [PATCH 046/235] 8250: use the 8250 register interface not the legacy one The old interface just copies bits over and calls the newer one. In addition we can now pass more information. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 71 ++++++++------------- drivers/tty/serial/8250/8250_acorn.c | 22 +++---- drivers/tty/serial/8250/8250_dw.c | 36 +++++------ drivers/tty/serial/8250/8250_gsc.c | 24 ++++---- drivers/tty/serial/8250/8250_hp300.c | 26 ++++---- drivers/tty/serial/8250/8250_pci.c | 92 ++++++++++++++-------------- drivers/tty/serial/8250/8250_pnp.c | 28 ++++----- drivers/tty/serial/8250/serial_cs.c | 30 ++++----- include/linux/serial_8250.h | 1 - 9 files changed, 153 insertions(+), 177 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 8123f784bcd..2b2468506e0 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -2979,36 +2979,36 @@ void serial8250_resume_port(int line) static int __devinit serial8250_probe(struct platform_device *dev) { struct plat_serial8250_port *p = dev->dev.platform_data; - struct uart_port port; + struct uart_8250_port uart; int ret, i, irqflag = 0; - memset(&port, 0, sizeof(struct uart_port)); + memset(&uart, 0, sizeof(uart)); if (share_irqs) irqflag = IRQF_SHARED; for (i = 0; p && p->flags != 0; p++, i++) { - port.iobase = p->iobase; - port.membase = p->membase; - port.irq = p->irq; - port.irqflags = p->irqflags; - port.uartclk = p->uartclk; - port.regshift = p->regshift; - port.iotype = p->iotype; - port.flags = p->flags; - port.mapbase = p->mapbase; - port.hub6 = p->hub6; - port.private_data = p->private_data; - port.type = p->type; - port.serial_in = p->serial_in; - port.serial_out = p->serial_out; - port.handle_irq = p->handle_irq; - port.handle_break = p->handle_break; - port.set_termios = p->set_termios; - port.pm = p->pm; - port.dev = &dev->dev; - port.irqflags |= irqflag; - ret = serial8250_register_port(&port); + uart.port.iobase = p->iobase; + uart.port.membase = p->membase; + uart.port.irq = p->irq; + uart.port.irqflags = p->irqflags; + uart.port.uartclk = p->uartclk; + uart.port.regshift = p->regshift; + uart.port.iotype = p->iotype; + uart.port.flags = p->flags; + uart.port.mapbase = p->mapbase; + uart.port.hub6 = p->hub6; + uart.port.private_data = p->private_data; + uart.port.type = p->type; + uart.port.serial_in = p->serial_in; + uart.port.serial_out = p->serial_out; + uart.port.handle_irq = p->handle_irq; + uart.port.handle_break = p->handle_break; + uart.port.set_termios = p->set_termios; + uart.port.pm = p->pm; + uart.port.dev = &dev->dev; + uart.port.irqflags |= irqflag; + ret = serial8250_register_8250_port(&uart); if (ret < 0) { dev_err(&dev->dev, "unable to register port at index %d " "(IO%lx MEM%llx IRQ%d): %d\n", i, @@ -3081,7 +3081,7 @@ static struct platform_driver serial8250_isa_driver = { static struct platform_device *serial8250_isa_devs; /* - * serial8250_register_port and serial8250_unregister_port allows for + * serial8250_register_8250_port and serial8250_unregister_port allows for * 16x50 serial ports to be configured at run-time, to support PCMCIA * modems and PCI multiport cards. */ @@ -3197,29 +3197,6 @@ int serial8250_register_8250_port(struct uart_8250_port *up) } EXPORT_SYMBOL(serial8250_register_8250_port); -/** - * serial8250_register_port - register a serial port - * @port: serial port template - * - * Configure the serial port specified by the request. If the - * port exists and is in use, it is hung up and unregistered - * first. - * - * The port is then probed and if necessary the IRQ is autodetected - * If this fails an error is returned. - * - * On success the port is ready to use and the line number is returned. - */ -int serial8250_register_port(struct uart_port *port) -{ - struct uart_8250_port up; - - memset(&up, 0, sizeof(up)); - memcpy(&up.port, port, sizeof(*port)); - return serial8250_register_8250_port(&up); -} -EXPORT_SYMBOL(serial8250_register_port); - /** * serial8250_unregister_port - remove a 16x50 serial port at runtime * @line: serial line number diff --git a/drivers/tty/serial/8250/8250_acorn.c b/drivers/tty/serial/8250/8250_acorn.c index b0ce8c56f1a..857498312a9 100644 --- a/drivers/tty/serial/8250/8250_acorn.c +++ b/drivers/tty/serial/8250/8250_acorn.c @@ -43,7 +43,7 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) { struct serial_card_info *info; struct serial_card_type *type = id->data; - struct uart_port port; + struct uart_8250_port uart; unsigned long bus_addr; unsigned int i; @@ -62,19 +62,19 @@ serial_card_probe(struct expansion_card *ec, const struct ecard_id *id) ecard_set_drvdata(ec, info); - memset(&port, 0, sizeof(struct uart_port)); - port.irq = ec->irq; - port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; - port.uartclk = type->uartclk; - port.iotype = UPIO_MEM; - port.regshift = 2; - port.dev = &ec->dev; + memset(&uart, 0, sizeof(struct uart_8250_port)); + uart.port.irq = ec->irq; + uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; + uart.port.uartclk = type->uartclk; + uart.port.iotype = UPIO_MEM; + uart.port.regshift = 2; + uart.port.dev = &ec->dev; for (i = 0; i < info->num_ports; i ++) { - port.membase = info->vaddr + type->offset[i]; - port.mapbase = bus_addr + type->offset[i]; + uart.port.membase = info->vaddr + type->offset[i]; + uart.port.mapbase = bus_addr + type->offset[i]; - info->ports[i] = serial8250_register_port(&port); + info->ports[i] = serial8250_register_8250_port(&uart); } return 0; diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index f574eef3075..afb955fdef0 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -89,7 +89,7 @@ static int dw8250_handle_irq(struct uart_port *p) static int __devinit dw8250_probe(struct platform_device *pdev) { - struct uart_port port = {}; + struct uart_8250_port uart = {}; struct resource *regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); struct resource *irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); struct device_node *np = pdev->dev.of_node; @@ -104,28 +104,28 @@ static int __devinit dw8250_probe(struct platform_device *pdev) data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); if (!data) return -ENOMEM; - port.private_data = data; + uart.port.private_data = data; - spin_lock_init(&port.lock); - port.mapbase = regs->start; - port.irq = irq->start; - port.handle_irq = dw8250_handle_irq; - port.type = PORT_8250; - port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP | + spin_lock_init(&uart.port.lock); + uart.port.mapbase = regs->start; + uart.port.irq = irq->start; + uart.port.handle_irq = dw8250_handle_irq; + uart.port.type = PORT_8250; + uart.port.flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_FIXED_PORT | UPF_FIXED_TYPE; - port.dev = &pdev->dev; + uart.port.dev = &pdev->dev; - port.iotype = UPIO_MEM; - port.serial_in = dw8250_serial_in; - port.serial_out = dw8250_serial_out; + uart.port.iotype = UPIO_MEM; + uart.port.serial_in = dw8250_serial_in; + uart.port.serial_out = dw8250_serial_out; if (!of_property_read_u32(np, "reg-io-width", &val)) { switch (val) { case 1: break; case 4: - port.iotype = UPIO_MEM32; - port.serial_in = dw8250_serial_in32; - port.serial_out = dw8250_serial_out32; + uart.port.iotype = UPIO_MEM32; + uart.port.serial_in = dw8250_serial_in32; + uart.port.serial_out = dw8250_serial_out32; break; default: dev_err(&pdev->dev, "unsupported reg-io-width (%u)\n", @@ -135,15 +135,15 @@ static int __devinit dw8250_probe(struct platform_device *pdev) } if (!of_property_read_u32(np, "reg-shift", &val)) - port.regshift = val; + uart.port.regshift = val; if (of_property_read_u32(np, "clock-frequency", &val)) { dev_err(&pdev->dev, "no clock-frequency property set\n"); return -EINVAL; } - port.uartclk = val; + uart.uart.port.uartclk = val; - data->line = serial8250_register_port(&port); + data->line = serial8250_register_8250_port(&uart); if (data->line < 0) return data->line; diff --git a/drivers/tty/serial/8250/8250_gsc.c b/drivers/tty/serial/8250/8250_gsc.c index d8c0ffbfa6e..097dff9c08a 100644 --- a/drivers/tty/serial/8250/8250_gsc.c +++ b/drivers/tty/serial/8250/8250_gsc.c @@ -26,7 +26,7 @@ static int __init serial_init_chip(struct parisc_device *dev) { - struct uart_port port; + struct uart_8250_port uart; unsigned long address; int err; @@ -48,21 +48,21 @@ static int __init serial_init_chip(struct parisc_device *dev) if (dev->id.sversion != 0x8d) address += 0x800; - memset(&port, 0, sizeof(port)); - port.iotype = UPIO_MEM; + memset(&uart, 0, sizeof(uart)); + uart.port.iotype = UPIO_MEM; /* 7.272727MHz on Lasi. Assumed the same for Dino, Wax and Timi. */ - port.uartclk = 7272727; - port.mapbase = address; - port.membase = ioremap_nocache(address, 16); - port.irq = dev->irq; - port.flags = UPF_BOOT_AUTOCONF; - port.dev = &dev->dev; + uart.port.uartclk = 7272727; + uart.port.mapbase = address; + uart.port.membase = ioremap_nocache(address, 16); + uart.port.irq = dev->irq; + uart.port.flags = UPF_BOOT_AUTOCONF; + uart.port.dev = &dev->dev; - err = serial8250_register_port(&port); + err = serial8250_register_8250_port(&uart); if (err < 0) { printk(KERN_WARNING - "serial8250_register_port returned error %d\n", err); - iounmap(port.membase); + "serial8250_register_8250_port returned error %d\n", err); + iounmap(uart.port.membase); return err; } diff --git a/drivers/tty/serial/8250/8250_hp300.c b/drivers/tty/serial/8250/8250_hp300.c index c13438c9301..8f1dd2cc00a 100644 --- a/drivers/tty/serial/8250/8250_hp300.c +++ b/drivers/tty/serial/8250/8250_hp300.c @@ -171,7 +171,7 @@ static int __devinit hpdca_init_one(struct dio_dev *d, return 0; } #endif - memset(&port, 0, sizeof(struct uart_port)); + memset(&uart, 0, sizeof(uart)); /* Memory mapped I/O */ port.iotype = UPIO_MEM; @@ -182,7 +182,7 @@ static int __devinit hpdca_init_one(struct dio_dev *d, port.membase = (char *)(port.mapbase + DIO_VIRADDRBASE); port.regshift = 1; port.dev = &d->dev; - line = serial8250_register_port(&port); + line = serial8250_register_8250_port(&uart); if (line < 0) { printk(KERN_NOTICE "8250_hp300: register_serial() DCA scode %d" @@ -210,7 +210,7 @@ static int __init hp300_8250_init(void) #ifdef CONFIG_HPAPCI int line; unsigned long base; - struct uart_port uport; + struct uart_8250_port uart; struct hp300_port *port; int i; #endif @@ -248,26 +248,26 @@ static int __init hp300_8250_init(void) if (!port) return -ENOMEM; - memset(&uport, 0, sizeof(struct uart_port)); + memset(&uart, 0, sizeof(uart)); base = (FRODO_BASE + FRODO_APCI_OFFSET(i)); /* Memory mapped I/O */ - uport.iotype = UPIO_MEM; - uport.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \ + uart.port.iotype = UPIO_MEM; + uart.port.flags = UPF_SKIP_TEST | UPF_SHARE_IRQ \ | UPF_BOOT_AUTOCONF; /* XXX - no interrupt support yet */ - uport.irq = 0; - uport.uartclk = HPAPCI_BAUD_BASE * 16; - uport.mapbase = base; - uport.membase = (char *)(base + DIO_VIRADDRBASE); - uport.regshift = 2; + uart.port.irq = 0; + uart.port.uartclk = HPAPCI_BAUD_BASE * 16; + uart.port.mapbase = base; + uart.port.membase = (char *)(base + DIO_VIRADDRBASE); + uart.port.regshift = 2; - line = serial8250_register_port(&uport); + line = serial8250_register_8250_port(&uart); if (line < 0) { printk(KERN_NOTICE "8250_hp300: register_serial() APCI" - " %d irq %d failed\n", i, uport.irq); + " %d irq %d failed\n", i, uart.port.irq); kfree(port); continue; } diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 66e5909d0a1..2ef9a075eec 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -44,7 +44,7 @@ struct pci_serial_quirk { int (*init)(struct pci_dev *dev); int (*setup)(struct serial_private *, const struct pciserial_board *, - struct uart_port *, int); + struct uart_8250_port *, int); void (*exit)(struct pci_dev *dev); }; @@ -59,7 +59,7 @@ struct serial_private { }; static int pci_default_setup(struct serial_private*, - const struct pciserial_board*, struct uart_port*, int); + const struct pciserial_board*, struct uart_8250_port *, int); static void moan_device(const char *str, struct pci_dev *dev) { @@ -74,7 +74,7 @@ static void moan_device(const char *str, struct pci_dev *dev) } static int -setup_port(struct serial_private *priv, struct uart_port *port, +setup_port(struct serial_private *priv, struct uart_8250_port *port, int bar, int offset, int regshift) { struct pci_dev *dev = priv->dev; @@ -93,17 +93,17 @@ setup_port(struct serial_private *priv, struct uart_port *port, if (!priv->remapped_bar[bar]) return -ENOMEM; - port->iotype = UPIO_MEM; - port->iobase = 0; - port->mapbase = base + offset; - port->membase = priv->remapped_bar[bar] + offset; - port->regshift = regshift; + port->port.iotype = UPIO_MEM; + port->port.iobase = 0; + port->port.mapbase = base + offset; + port->port.membase = priv->remapped_bar[bar] + offset; + port->port.regshift = regshift; } else { - port->iotype = UPIO_PORT; - port->iobase = base + offset; - port->mapbase = 0; - port->membase = NULL; - port->regshift = 0; + port->port.iotype = UPIO_PORT; + port->port.iobase = base + offset; + port->port.mapbase = 0; + port->port.membase = NULL; + port->port.regshift = 0; } return 0; } @@ -113,7 +113,7 @@ setup_port(struct serial_private *priv, struct uart_port *port, */ static int addidata_apci7800_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar = 0, offset = board->first_offset; bar = FL_GET_BASE(board->flags); @@ -140,7 +140,7 @@ static int addidata_apci7800_setup(struct serial_private *priv, */ static int afavlab_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar, offset = board->first_offset; @@ -195,7 +195,7 @@ static int pci_hp_diva_init(struct pci_dev *dev) static int pci_hp_diva_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int offset = board->first_offset; unsigned int bar = FL_GET_BASE(board->flags); @@ -370,7 +370,7 @@ static void __devexit pci_ni8430_exit(struct pci_dev *dev) /* SBS Technologies Inc. PMC-OCTPRO and P-OCTAL cards */ static int sbs_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar, offset = board->first_offset; @@ -525,7 +525,7 @@ static int pci_siig_init(struct pci_dev *dev) static int pci_siig_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar = FL_GET_BASE(board->flags) + idx, offset = 0; @@ -619,7 +619,7 @@ static int pci_timedia_init(struct pci_dev *dev) static int pci_timedia_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar = 0, offset = board->first_offset; @@ -653,7 +653,7 @@ pci_timedia_setup(struct serial_private *priv, static int titan_400l_800l_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar, offset = board->first_offset; @@ -754,7 +754,7 @@ static int pci_ni8430_init(struct pci_dev *dev) static int pci_ni8430_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { void __iomem *p; unsigned long base, len; @@ -781,7 +781,7 @@ pci_ni8430_setup(struct serial_private *priv, static int pci_netmos_9900_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar; @@ -1035,7 +1035,7 @@ static int pci_oxsemi_tornado_init(struct pci_dev *dev) static int pci_default_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { unsigned int bar, offset = board->first_offset, maxnr; @@ -1057,15 +1057,15 @@ pci_default_setup(struct serial_private *priv, static int ce4100_serial_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { int ret; ret = setup_port(priv, port, 0, 0, board->reg_shift); - port->iotype = UPIO_MEM32; - port->type = PORT_XSCALE; - port->flags = (port->flags | UPF_FIXED_PORT | UPF_FIXED_TYPE); - port->regshift = 2; + port->port.iotype = UPIO_MEM32; + port->port.type = PORT_XSCALE; + port->port.flags = (port->port.flags | UPF_FIXED_PORT | UPF_FIXED_TYPE); + port->port.regshift = 2; return ret; } @@ -1073,16 +1073,16 @@ ce4100_serial_setup(struct serial_private *priv, static int pci_omegapci_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { return setup_port(priv, port, 2, idx * 8, 0); } static int skip_tx_en_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { - port->flags |= UPF_NO_TXEN_TEST; + port->port.flags |= UPF_NO_TXEN_TEST; printk(KERN_DEBUG "serial8250: skipping TxEn test for device " "[%04x:%04x] subsystem [%04x:%04x]\n", priv->dev->vendor, @@ -1131,11 +1131,11 @@ static unsigned int kt_serial_in(struct uart_port *p, int offset) static int kt_serial_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { - port->flags |= UPF_BUG_THRE; - port->serial_in = kt_serial_in; - port->handle_break = kt_handle_break; + port->port.flags |= UPF_BUG_THRE; + port->port.serial_in = kt_serial_in; + port->port.handle_break = kt_handle_break; return skip_tx_en_setup(priv, board, port, idx); } @@ -1151,9 +1151,9 @@ static int pci_eg20t_init(struct pci_dev *dev) static int pci_xr17c154_setup(struct serial_private *priv, const struct pciserial_board *board, - struct uart_port *port, int idx) + struct uart_8250_port *port, int idx) { - port->flags |= UPF_EXAR_EFR; + port->port.flags |= UPF_EXAR_EFR; return pci_default_setup(priv, board, port, idx); } @@ -2720,7 +2720,7 @@ serial_pci_matches(const struct pciserial_board *board, struct serial_private * pciserial_init_ports(struct pci_dev *dev, const struct pciserial_board *board) { - struct uart_port serial_port; + struct uart_8250_port uart; struct serial_private *priv; struct pci_serial_quirk *quirk; int rc, nr_ports, i; @@ -2760,22 +2760,22 @@ pciserial_init_ports(struct pci_dev *dev, const struct pciserial_board *board) priv->dev = dev; priv->quirk = quirk; - memset(&serial_port, 0, sizeof(struct uart_port)); - serial_port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; - serial_port.uartclk = board->base_baud * 16; - serial_port.irq = get_pci_irq(dev, board); - serial_port.dev = &dev->dev; + memset(&uart, 0, sizeof(uart)); + uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ; + uart.port.uartclk = board->base_baud * 16; + uart.port.irq = get_pci_irq(dev, board); + uart.port.dev = &dev->dev; for (i = 0; i < nr_ports; i++) { - if (quirk->setup(priv, board, &serial_port, i)) + if (quirk->setup(priv, board, &uart, i)) break; #ifdef SERIAL_DEBUG_PCI printk(KERN_DEBUG "Setup PCI port: port %lx, irq %d, type %d\n", - serial_port.iobase, serial_port.irq, serial_port.iotype); + uart.port.iobase, uart.port.irq, uart.port.iotype); #endif - priv->line[i] = serial8250_register_port(&serial_port); + priv->line[i] = serial8250_register_8250_port(&uart); if (priv->line[i] < 0) { printk(KERN_WARNING "Couldn't register serial port %s: %d\n", pci_name(dev), priv->line[i]); break; diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index a2f236510ff..fde5aa60d51 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -424,7 +424,7 @@ static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags) static int __devinit serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) { - struct uart_port port; + struct uart_8250_port uart; int ret, line, flags = dev_id->driver_data; if (flags & UNKNOWN_DEV) { @@ -433,32 +433,32 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) return ret; } - memset(&port, 0, sizeof(struct uart_port)); + memset(&uart, 0, sizeof(uart)); if (pnp_irq_valid(dev, 0)) - port.irq = pnp_irq(dev, 0); + uart.port.irq = pnp_irq(dev, 0); if (pnp_port_valid(dev, 0)) { - port.iobase = pnp_port_start(dev, 0); - port.iotype = UPIO_PORT; + uart.port.iobase = pnp_port_start(dev, 0); + uart.port.iotype = UPIO_PORT; } else if (pnp_mem_valid(dev, 0)) { - port.mapbase = pnp_mem_start(dev, 0); - port.iotype = UPIO_MEM; - port.flags = UPF_IOREMAP; + uart.port.mapbase = pnp_mem_start(dev, 0); + uart.port.iotype = UPIO_MEM; + uart.port.flags = UPF_IOREMAP; } else return -ENODEV; #ifdef SERIAL_DEBUG_PNP printk(KERN_DEBUG "Setup PNP port: port %x, mem 0x%lx, irq %d, type %d\n", - port.iobase, port.mapbase, port.irq, port.iotype); + uart.port.iobase, uart.port.mapbase, uart.port.irq, uart.port.iotype); #endif - port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; + uart.port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE) - port.flags |= UPF_SHARE_IRQ; - port.uartclk = 1843200; - port.dev = &dev->dev; + uart.port.flags |= UPF_SHARE_IRQ; + uart.port.uartclk = 1843200; + uart.port.dev = &dev->dev; - line = serial8250_register_port(&port); + line = serial8250_register_8250_port(&uart); if (line < 0) return -ENODEV; diff --git a/drivers/tty/serial/8250/serial_cs.c b/drivers/tty/serial/8250/serial_cs.c index 29b695d041e..b7d48b34639 100644 --- a/drivers/tty/serial/8250/serial_cs.c +++ b/drivers/tty/serial/8250/serial_cs.c @@ -73,7 +73,7 @@ struct serial_quirk { unsigned int prodid; int multi; /* 1 = multifunction, > 1 = # ports */ void (*config)(struct pcmcia_device *); - void (*setup)(struct pcmcia_device *, struct uart_port *); + void (*setup)(struct pcmcia_device *, struct uart_8250_port *); void (*wakeup)(struct pcmcia_device *); int (*post)(struct pcmcia_device *); }; @@ -105,9 +105,9 @@ struct serial_cfg_mem { * Elan VPU16551 UART with 14.7456MHz oscillator * manfid 0x015D, 0x4C45 */ -static void quirk_setup_brainboxes_0104(struct pcmcia_device *link, struct uart_port *port) +static void quirk_setup_brainboxes_0104(struct pcmcia_device *link, struct uart_8250_port *uart) { - port->uartclk = 14745600; + uart->port.uartclk = 14745600; } static int quirk_post_ibm(struct pcmcia_device *link) @@ -343,25 +343,25 @@ static void serial_detach(struct pcmcia_device *link) static int setup_serial(struct pcmcia_device *handle, struct serial_info * info, unsigned int iobase, int irq) { - struct uart_port port; + struct uart_8250_port uart; int line; - memset(&port, 0, sizeof (struct uart_port)); - port.iobase = iobase; - port.irq = irq; - port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ; - port.uartclk = 1843200; - port.dev = &handle->dev; + memset(&uart, 0, sizeof(uart)); + uart.port.iobase = iobase; + uart.port.irq = irq; + uart.port.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_SHARE_IRQ; + uart.port.uartclk = 1843200; + uart.port.dev = &handle->dev; if (buggy_uart) - port.flags |= UPF_BUGGY_UART; + uart.port.flags |= UPF_BUGGY_UART; if (info->quirk && info->quirk->setup) - info->quirk->setup(handle, &port); + info->quirk->setup(handle, &uart); - line = serial8250_register_port(&port); + line = serial8250_register_8250_port(&uart); if (line < 0) { - printk(KERN_NOTICE "serial_cs: serial8250_register_port() at " - "0x%04lx, irq %d failed\n", (u_long)iobase, irq); + pr_err("serial_cs: serial8250_register_8250_port() at 0x%04lx, irq %d failed\n", + (unsigned long)iobase, irq); return -EINVAL; } diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index a416e92012e..f41dcc94921 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -69,7 +69,6 @@ struct uart_port; struct uart_8250_port; int serial8250_register_8250_port(struct uart_8250_port *); -int serial8250_register_port(struct uart_port *); void serial8250_unregister_port(int line); void serial8250_suspend_port(int line); void serial8250_resume_port(int line); From a2d33d87d8a4a5047597439fb917f57e4264a79a Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 12 Jul 2012 13:00:06 +0100 Subject: [PATCH 047/235] 8250: propogate the bugs field Now we are using the uart_8250_port this is trivial Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 2b2468506e0..ca42d16e5a1 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -3155,6 +3155,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart->port.regshift = up->port.regshift; uart->port.iotype = up->port.iotype; uart->port.flags = up->port.flags | UPF_BOOT_AUTOCONF; + uart->bugs = up->bugs; uart->port.mapbase = up->port.mapbase; uart->port.private_data = up->port.private_data; if (up->port.dev) From eb26dfe8aa7eeb5a5aa0b7574550125f8aa4c3b3 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 12 Jul 2012 13:00:31 +0100 Subject: [PATCH 048/235] 8250: add support for ASIX devices with a FIFO bug Information and a different patch provided by . We do it a little differently to keep the modularity and to avoid playing with RLSI. We add a new uart bug for the parity flaw and set it in the pci matches. If parity check is enabled then we drop the FIFO trigger to 1 as per the Asix reference code. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 8 ++++++-- drivers/tty/serial/8250/8250.h | 1 + drivers/tty/serial/8250/8250_pci.c | 24 +++++++++++++++++++++--- 3 files changed, 28 insertions(+), 5 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index ca42d16e5a1..44f52c6f15b 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -2202,6 +2202,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, unsigned char cval, fcr = 0; unsigned long flags; unsigned int baud, quot; + int fifo_bug = 0; switch (termios->c_cflag & CSIZE) { case CS5: @@ -2221,8 +2222,11 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, if (termios->c_cflag & CSTOPB) cval |= UART_LCR_STOP; - if (termios->c_cflag & PARENB) + if (termios->c_cflag & PARENB) { cval |= UART_LCR_PARITY; + if (up->bugs & UART_BUG_PARITY) + fifo_bug = 1; + } if (!(termios->c_cflag & PARODD)) cval |= UART_LCR_EPAR; #ifdef CMSPAR @@ -2246,7 +2250,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, if (up->capabilities & UART_CAP_FIFO && port->fifosize > 1) { fcr = uart_config[port->type].fcr; - if (baud < 2400) { + if (baud < 2400 || fifo_bug) { fcr &= ~UART_FCR_TRIGGER_MASK; fcr |= UART_FCR_TRIGGER_1; } diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index f9719d167c8..c335b2b23a5 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -78,6 +78,7 @@ struct serial8250_config { #define UART_BUG_TXEN (1 << 1) /* UART has buggy TX IIR status */ #define UART_BUG_NOMSR (1 << 2) /* UART has buggy MSR status bits (Au1x00) */ #define UART_BUG_THRE (1 << 3) /* UART has buggy THRE reassertion */ +#define UART_BUG_PARITY (1 << 4) /* UART mishandles parity if FIFO enabled */ #define PROBE_RSA (1 << 0) #define PROBE_ANY (~0) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 2ef9a075eec..62e10fe747a 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1032,8 +1032,15 @@ static int pci_oxsemi_tornado_init(struct pci_dev *dev) return number_uarts; } -static int -pci_default_setup(struct serial_private *priv, +static int pci_asix_setup(struct serial_private *priv, + const struct pciserial_board *board, + struct uart_8250_port *port, int idx) +{ + port->bugs |= UART_BUG_PARITY; + return pci_default_setup(priv, board, port, idx); +} + +static int pci_default_setup(struct serial_private *priv, const struct pciserial_board *board, struct uart_8250_port *port, int idx) { @@ -1187,6 +1194,7 @@ pci_xr17c154_setup(struct serial_private *priv, #define PCIE_DEVICE_ID_NEO_2_OX_IBM 0x00F6 #define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001 #define PCI_DEVICE_ID_INTEL_PATSBURG_KT 0x1d3d +#define PCI_VENDOR_ID_ASIX 0x9710 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ #define PCI_SUBDEVICE_ID_UNKNOWN_0x1584 0x1584 @@ -1726,7 +1734,17 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, .setup = pci_omegapci_setup, - }, + }, + /* + * ASIX devices with FIFO bug + */ + { + .vendor = PCI_VENDOR_ID_ASIX, + .device = PCI_ANY_ID, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_asix_setup, + }, /* * Default "match everything" terminator entry */ From 40c9f61eae9098212b6906f29f30f08f7a19b5e2 Mon Sep 17 00:00:00 2001 From: Shachar Shemesh Date: Tue, 10 Jul 2012 07:54:13 +0300 Subject: [PATCH 049/235] tty ldisc: Close/Reopen race prevention should check the proper flag Commit acfa747b introduced the TTY_HUPPING flag to distinguish closed TTY from currently closing ones. The test in tty_set_ldisc still remained pointing at the old flag. This causes pppd to sometimes lapse into uninterruptible sleep when killed and restarted. Signed-off-by: Shachar Shemesh Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_ldisc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index ba8be396a62..847f7ed7a3e 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -659,7 +659,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) goto enable; } - if (test_bit(TTY_HUPPED, &tty->flags)) { + if (test_bit(TTY_HUPPING, &tty->flags)) { /* We were raced by the hangup method. It will have stomped the ldisc data and closed the ldisc down */ clear_bit(TTY_LDISC_CHANGING, &tty->flags); From 6d31a88cb2e01d46c0cb74aa5da529e1f92ae3db Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 14 Jul 2012 15:31:27 +0100 Subject: [PATCH 050/235] tty: revert incorrectly applied lock patch I sent GregKH this after the pre-requisites. He dropped the pre-requesites for good reason and unfortunately then applied this patch. Without this reverted you get random kernel memory corruption which will make bisecting anything between it and the properly applied patches a complete sod. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 14 +++---- drivers/tty/cyclades.c | 2 +- drivers/tty/n_r3964.c | 10 ++--- drivers/tty/pty.c | 23 ++++++------ drivers/tty/serial/crisv10.c | 8 ++-- drivers/tty/synclink.c | 4 +- drivers/tty/synclink_gt.c | 4 +- drivers/tty/synclinkmp.c | 4 +- drivers/tty/tty_io.c | 67 ++++++++++++++-------------------- drivers/tty/tty_ldisc.c | 67 +++++++++++++++------------------- drivers/tty/tty_mutex.c | 71 ++++++++---------------------------- drivers/tty/tty_port.c | 6 +-- include/linux/tty.h | 23 +++++------- net/bluetooth/rfcomm/tty.c | 4 +- 14 files changed, 119 insertions(+), 188 deletions(-) diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 35819e31262..6cc4358f68c 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1033,7 +1033,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); - tty_lock(tty); + tty_lock(); tmp.line = tty->index; tmp.port = state->port; tmp.flags = state->tport.flags; @@ -1042,7 +1042,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, tmp.close_delay = state->tport.close_delay; tmp.closing_wait = state->tport.closing_wait; tmp.custom_divisor = state->custom_divisor; - tty_unlock(tty); + tty_unlock(); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1059,12 +1059,12 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) return -EFAULT; - tty_lock(tty); + tty_lock(); change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) || new_serial.custom_divisor != state->custom_divisor; if (new_serial.irq || new_serial.port != state->port || new_serial.xmit_fifo_size != state->xmit_fifo_size) { - tty_unlock(tty); + tty_unlock(); return -EINVAL; } @@ -1074,7 +1074,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, (new_serial.xmit_fifo_size != state->xmit_fifo_size) || ((new_serial.flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) { - tty_unlock(tty); + tty_unlock(); return -EPERM; } port->flags = ((port->flags & ~ASYNC_USR_MASK) | @@ -1084,7 +1084,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, } if (new_serial.baud_base < 9600) { - tty_unlock(tty); + tty_unlock(); return -EINVAL; } @@ -1116,7 +1116,7 @@ check_and_exit: } } else retval = startup(tty, state); - tty_unlock(tty); + tty_unlock(); return retval; } diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index 69e9ca2dd4b..cff546839db 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1599,7 +1599,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp) * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(tty, info->port.close_wait, + wait_event_interruptible_tty(info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 1e6405070ce..5c6c31459a2 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -1065,7 +1065,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, TRACE_L("read()"); - tty_lock(tty); + tty_lock(); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1077,7 +1077,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, goto unlock; } /* block until there is a message: */ - wait_event_interruptible_tty(tty, pInfo->read_wait, + wait_event_interruptible_tty(pInfo->read_wait, (pMsg = remove_msg(pInfo, pClient))); } @@ -1107,7 +1107,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, } ret = -EPERM; unlock: - tty_unlock(tty); + tty_unlock(); return ret; } @@ -1156,7 +1156,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, pHeader->locks = 0; pHeader->owner = NULL; - tty_lock(tty); + tty_lock(); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1175,7 +1175,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, add_tx_queue(pInfo, pHeader); trigger_transmit(pInfo); - tty_unlock(tty); + tty_unlock(); return 0; } diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index a0ca0830cbc..b50fc1c0141 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -47,7 +47,6 @@ static void pty_close(struct tty_struct *tty, struct file *filp) wake_up_interruptible(&tty->read_wait); wake_up_interruptible(&tty->write_wait); tty->packet = 0; - /* Review - krefs on tty_link ?? */ if (!tty->link) return; tty->link->packet = 0; @@ -63,9 +62,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&devpts_mutex); } #endif - tty_unlock(tty); + tty_unlock(); tty_vhangup(tty->link); - tty_lock(tty); + tty_lock(); } } @@ -616,26 +615,26 @@ static int ptmx_open(struct inode *inode, struct file *filp) return retval; /* find a device that is not in use. */ - mutex_lock(&devpts_mutex); + tty_lock(); index = devpts_new_index(inode); - mutex_unlock(&devpts_mutex); + tty_unlock(); if (index < 0) { retval = index; goto err_file; } mutex_lock(&tty_mutex); + mutex_lock(&devpts_mutex); tty = tty_init_dev(ptm_driver, index); + mutex_unlock(&devpts_mutex); + tty_lock(); + mutex_unlock(&tty_mutex); if (IS_ERR(tty)) { retval = PTR_ERR(tty); goto out; } - /* The tty returned here is locked so we can safely - drop the mutex */ - mutex_unlock(&tty_mutex); - set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */ tty_add_file(tty, filp); @@ -648,15 +647,15 @@ static int ptmx_open(struct inode *inode, struct file *filp) if (retval) goto err_release; - tty_unlock(tty); + tty_unlock(); return 0; err_release: - tty_unlock(tty); + tty_unlock(); tty_release(inode, filp); return retval; out: - mutex_unlock(&tty_mutex); devpts_kill_index(inode, index); + tty_unlock(); err_file: tty_free_file(filp); return retval; diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 7264d4d2671..80b6b1b1f72 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -3976,7 +3976,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(tty, info->close_wait, + wait_event_interruptible_tty(info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART if (info->flags & ASYNC_HUP_NOTIFY) @@ -4052,9 +4052,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttyS%d, count = %d\n", info->line, info->count); #endif - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); @@ -4115,7 +4115,7 @@ rs_open(struct tty_struct *tty, struct file * filp) */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(tty, info->close_wait, + wait_event_interruptible_tty(info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART return ((info->flags & ASYNC_HUP_NOTIFY) ? diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 5ed0daae656..593d40ad0a6 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3338,9 +3338,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("%s(%d):block_til_ready blocking on %s count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 45b43f11ca3..aa1debf97cc 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3336,9 +3336,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } DBGINFO(("%s block_til_ready wait\n", tty->driver->name)); - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index 4a1e4f07765..a3dddc12d2f 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -3357,9 +3357,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, printk("%s(%d):%s block_til_ready() count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index ca7c25d9f6d..ac96f74573d 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -185,7 +185,6 @@ void free_tty_struct(struct tty_struct *tty) put_device(tty->dev); kfree(tty->write_buf); tty_buffer_free_all(tty); - tty->magic = 0xDEADDEAD; kfree(tty); } @@ -574,7 +573,7 @@ void __tty_hangup(struct tty_struct *tty) } spin_unlock(&redirect_lock); - tty_lock(tty); + tty_lock(); /* some functions below drop BTM, so we need this bit */ set_bit(TTY_HUPPING, &tty->flags); @@ -667,7 +666,7 @@ void __tty_hangup(struct tty_struct *tty) clear_bit(TTY_HUPPING, &tty->flags); tty_ldisc_enable(tty); - tty_unlock(tty); + tty_unlock(); if (f) fput(f); @@ -1104,12 +1103,12 @@ void tty_write_message(struct tty_struct *tty, char *msg) { if (tty) { mutex_lock(&tty->atomic_write_lock); - tty_lock(tty); + tty_lock(); if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) { - tty_unlock(tty); + tty_unlock(); tty->ops->write(tty, msg, strlen(msg)); } else - tty_unlock(tty); + tty_unlock(); tty_write_unlock(tty); } return; @@ -1404,7 +1403,6 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) } initialize_tty_struct(tty, driver, idx); - tty_lock(tty); retval = tty_driver_install_tty(driver, tty); if (retval < 0) goto err_deinit_tty; @@ -1420,11 +1418,9 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) retval = tty_ldisc_setup(tty, tty->link); if (retval) goto err_release_tty; - /* Return the tty locked so that it cannot vanish under the caller */ return tty; err_deinit_tty: - tty_unlock(tty); deinitialize_tty_struct(tty); free_tty_struct(tty); err_module_put: @@ -1433,7 +1429,6 @@ err_module_put: /* call the tty release_tty routine to clean out this slot */ err_release_tty: - tty_unlock(tty); printk_ratelimited(KERN_INFO "tty_init_dev: ldisc open failed, " "clearing slot %d\n", idx); release_tty(tty, idx); @@ -1636,7 +1631,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty_paranoia_check(tty, inode, __func__)) return 0; - tty_lock(tty); + tty_lock(); check_tty_count(tty, __func__); __tty_fasync(-1, filp, 0); @@ -1645,11 +1640,10 @@ int tty_release(struct inode *inode, struct file *filp) pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY && tty->driver->subtype == PTY_TYPE_MASTER); devpts = (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM) != 0; - /* Review: parallel close */ o_tty = tty->link; if (tty_release_checks(tty, o_tty, idx)) { - tty_unlock(tty); + tty_unlock(); return 0; } @@ -1661,7 +1655,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->ops->close) tty->ops->close(tty, filp); - tty_unlock(tty); + tty_unlock(); /* * Sanity check: if tty->count is going to zero, there shouldn't be * any waiters on tty->read_wait or tty->write_wait. We test the @@ -1684,7 +1678,7 @@ int tty_release(struct inode *inode, struct file *filp) opens on /dev/tty */ mutex_lock(&tty_mutex); - tty_lock_pair(tty, o_tty); + tty_lock(); tty_closing = tty->count <= 1; o_tty_closing = o_tty && (o_tty->count <= (pty_master ? 1 : 0)); @@ -1715,7 +1709,7 @@ int tty_release(struct inode *inode, struct file *filp) printk(KERN_WARNING "%s: %s: read/write wait queue active!\n", __func__, tty_name(tty, buf)); - tty_unlock_pair(tty, o_tty); + tty_unlock(); mutex_unlock(&tty_mutex); schedule(); } @@ -1778,7 +1772,7 @@ int tty_release(struct inode *inode, struct file *filp) /* check whether both sides are closing ... */ if (!tty_closing || (o_tty && !o_tty_closing)) { - tty_unlock_pair(tty, o_tty); + tty_unlock(); return 0; } @@ -1791,16 +1785,14 @@ int tty_release(struct inode *inode, struct file *filp) tty_ldisc_release(tty, o_tty); /* * The release_tty function takes care of the details of clearing - * the slots and preserving the termios structure. The tty_unlock_pair - * should be safe as we keep a kref while the tty is locked (so the - * unlock never unlocks a freed tty). + * the slots and preserving the termios structure. */ release_tty(tty, idx); - tty_unlock_pair(tty, o_tty); /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); + tty_unlock(); return 0; } @@ -1904,9 +1896,6 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp, * Locking: tty_mutex protects tty, tty_lookup_driver and tty_init_dev. * tty->count should protect the rest. * ->siglock protects ->signal/->sighand - * - * Note: the tty_unlock/lock cases without a ref are only safe due to - * tty_mutex */ static int tty_open(struct inode *inode, struct file *filp) @@ -1930,7 +1919,8 @@ retry_open: retval = 0; mutex_lock(&tty_mutex); - /* This is protected by the tty_mutex */ + tty_lock(); + tty = tty_open_current_tty(device, filp); if (IS_ERR(tty)) { retval = PTR_ERR(tty); @@ -1951,19 +1941,17 @@ retry_open: } if (tty) { - tty_lock(tty); retval = tty_reopen(tty); - if (retval < 0) { - tty_unlock(tty); + if (retval) tty = ERR_PTR(retval); - } - } else /* Returns with the tty_lock held for now */ + } else tty = tty_init_dev(driver, index); mutex_unlock(&tty_mutex); if (driver) tty_driver_kref_put(driver); if (IS_ERR(tty)) { + tty_unlock(); retval = PTR_ERR(tty); goto err_file; } @@ -1992,7 +1980,7 @@ retry_open: printk(KERN_DEBUG "%s: error %d in opening %s...\n", __func__, retval, tty->name); #endif - tty_unlock(tty); /* need to call tty_release without BTM */ + tty_unlock(); /* need to call tty_release without BTM */ tty_release(inode, filp); if (retval != -ERESTARTSYS) return retval; @@ -2004,15 +1992,17 @@ retry_open: /* * Need to reset f_op in case a hangup happened. */ + tty_lock(); if (filp->f_op == &hung_up_tty_fops) filp->f_op = &tty_fops; + tty_unlock(); goto retry_open; } - tty_unlock(tty); + tty_unlock(); mutex_lock(&tty_mutex); - tty_lock(tty); + tty_lock(); spin_lock_irq(¤t->sighand->siglock); if (!noctty && current->signal->leader && @@ -2020,10 +2010,11 @@ retry_open: tty->session == NULL) __proc_set_tty(current, tty); spin_unlock_irq(¤t->sighand->siglock); - tty_unlock(tty); + tty_unlock(); mutex_unlock(&tty_mutex); return 0; err_unlock: + tty_unlock(); mutex_unlock(&tty_mutex); /* after locks to avoid deadlock */ if (!IS_ERR_OR_NULL(driver)) @@ -2106,13 +2097,10 @@ out: static int tty_fasync(int fd, struct file *filp, int on) { - struct tty_struct *tty = file_tty(filp); int retval; - - tty_lock(tty); + tty_lock(); retval = __tty_fasync(fd, filp, on); - tty_unlock(tty); - + tty_unlock(); return retval; } @@ -2949,7 +2937,6 @@ void initialize_tty_struct(struct tty_struct *tty, tty->pgrp = NULL; tty->overrun_time = jiffies; tty_buffer_init(tty); - mutex_init(&tty->legacy_mutex); mutex_init(&tty->termios_mutex); mutex_init(&tty->ldisc_mutex); init_waitqueue_head(&tty->write_wait); diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 847f7ed7a3e..6f99c9959f0 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -568,7 +568,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) if (IS_ERR(new_ldisc)) return PTR_ERR(new_ldisc); - tty_lock(tty); + tty_lock(); /* * We need to look at the tty locking here for pty/tty pairs * when both sides try to change in parallel. @@ -582,12 +582,12 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) */ if (tty->ldisc->ops->num == ldisc) { - tty_unlock(tty); + tty_unlock(); tty_ldisc_put(new_ldisc); return 0; } - tty_unlock(tty); + tty_unlock(); /* * Problem: What do we do if this blocks ? * We could deadlock here @@ -595,7 +595,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) tty_wait_until_sent(tty, 0); - tty_lock(tty); + tty_lock(); mutex_lock(&tty->ldisc_mutex); /* @@ -605,10 +605,10 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) while (test_bit(TTY_LDISC_CHANGING, &tty->flags)) { mutex_unlock(&tty->ldisc_mutex); - tty_unlock(tty); + tty_unlock(); wait_event(tty_ldisc_wait, test_bit(TTY_LDISC_CHANGING, &tty->flags) == 0); - tty_lock(tty); + tty_lock(); mutex_lock(&tty->ldisc_mutex); } @@ -623,7 +623,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) o_ldisc = tty->ldisc; - tty_unlock(tty); + tty_unlock(); /* * Make sure we don't change while someone holds a * reference to the line discipline. The TTY_LDISC bit @@ -650,7 +650,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) retval = tty_ldisc_wait_idle(tty, 5 * HZ); - tty_lock(tty); + tty_lock(); mutex_lock(&tty->ldisc_mutex); /* handle wait idle failure locked */ @@ -665,7 +665,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) clear_bit(TTY_LDISC_CHANGING, &tty->flags); mutex_unlock(&tty->ldisc_mutex); tty_ldisc_put(new_ldisc); - tty_unlock(tty); + tty_unlock(); return -EIO; } @@ -708,7 +708,7 @@ enable: if (o_work) schedule_work(&o_tty->buf.work); mutex_unlock(&tty->ldisc_mutex); - tty_unlock(tty); + tty_unlock(); return retval; } @@ -816,11 +816,11 @@ void tty_ldisc_hangup(struct tty_struct *tty) * need to wait for another function taking the BTM */ clear_bit(TTY_LDISC, &tty->flags); - tty_unlock(tty); + tty_unlock(); cancel_work_sync(&tty->buf.work); mutex_unlock(&tty->ldisc_mutex); retry: - tty_lock(tty); + tty_lock(); mutex_lock(&tty->ldisc_mutex); /* At this point we have a closed ldisc and we want to @@ -831,7 +831,7 @@ retry: if (atomic_read(&tty->ldisc->users) != 1) { char cur_n[TASK_COMM_LEN], tty_n[64]; long timeout = 3 * HZ; - tty_unlock(tty); + tty_unlock(); while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) { timeout = MAX_SCHEDULE_TIMEOUT; @@ -894,23 +894,6 @@ int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty) tty_ldisc_enable(tty); return 0; } - -static void tty_ldisc_kill(struct tty_struct *tty) -{ - mutex_lock(&tty->ldisc_mutex); - /* - * Now kill off the ldisc - */ - tty_ldisc_close(tty, tty->ldisc); - tty_ldisc_put(tty->ldisc); - /* Force an oops if we mess this up */ - tty->ldisc = NULL; - - /* Ensure the next open requests the N_TTY ldisc */ - tty_set_termios_ldisc(tty, N_TTY); - mutex_unlock(&tty->ldisc_mutex); -} - /** * tty_ldisc_release - release line discipline * @tty: tty being shut down @@ -929,19 +912,27 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) * race with the set_ldisc code path. */ - tty_unlock_pair(tty, o_tty); + tty_unlock(); tty_ldisc_halt(tty); tty_ldisc_flush_works(tty); - if (o_tty) { - tty_ldisc_halt(o_tty); - tty_ldisc_flush_works(o_tty); - } - tty_lock_pair(tty, o_tty); + tty_lock(); + mutex_lock(&tty->ldisc_mutex); + /* + * Now kill off the ldisc + */ + tty_ldisc_close(tty, tty->ldisc); + tty_ldisc_put(tty->ldisc); + /* Force an oops if we mess this up */ + tty->ldisc = NULL; - tty_ldisc_kill(tty); + /* Ensure the next open requests the N_TTY ldisc */ + tty_set_termios_ldisc(tty, N_TTY); + mutex_unlock(&tty->ldisc_mutex); + + /* This will need doing differently if we need to lock */ if (o_tty) - tty_ldisc_kill(o_tty); + tty_ldisc_release(o_tty, NULL); /* And the memory resources remaining (buffers, termios) will be disposed of when the kref hits zero */ diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 67feac9e6eb..9ff986c32a2 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -4,70 +4,29 @@ #include #include -/* Legacy tty mutex glue */ - -enum { - TTY_MUTEX_NORMAL, - TTY_MUTEX_NESTED, -}; +/* + * The 'big tty mutex' + * + * This mutex is taken and released by tty_lock() and tty_unlock(), + * replacing the older big kernel lock. + * It can no longer be taken recursively, and does not get + * released implicitly while sleeping. + * + * Don't use in new code. + */ +static DEFINE_MUTEX(big_tty_mutex); /* * Getting the big tty mutex. */ - -static void __lockfunc tty_lock_nested(struct tty_struct *tty, - unsigned int subclass) +void __lockfunc tty_lock(void) { - if (tty->magic != TTY_MAGIC) { - printk(KERN_ERR "L Bad %p\n", tty); - WARN_ON(1); - return; - } - tty_kref_get(tty); - mutex_lock_nested(&tty->legacy_mutex, subclass); -} - -void __lockfunc tty_lock(struct tty_struct *tty) -{ - return tty_lock_nested(tty, TTY_MUTEX_NORMAL); + mutex_lock(&big_tty_mutex); } EXPORT_SYMBOL(tty_lock); -void __lockfunc tty_unlock(struct tty_struct *tty) +void __lockfunc tty_unlock(void) { - if (tty->magic != TTY_MAGIC) { - printk(KERN_ERR "U Bad %p\n", tty); - WARN_ON(1); - return; - } - mutex_unlock(&tty->legacy_mutex); - tty_kref_put(tty); + mutex_unlock(&big_tty_mutex); } EXPORT_SYMBOL(tty_unlock); - -/* - * Getting the big tty mutex for a pair of ttys with lock ordering - * On a non pty/tty pair tty2 can be NULL which is just fine. - */ -void __lockfunc tty_lock_pair(struct tty_struct *tty, - struct tty_struct *tty2) -{ - if (tty < tty2) { - tty_lock(tty); - tty_lock_nested(tty2, TTY_MUTEX_NESTED); - } else { - if (tty2 && tty2 != tty) - tty_lock(tty2); - tty_lock_nested(tty, TTY_MUTEX_NESTED); - } -} -EXPORT_SYMBOL(tty_lock_pair); - -void __lockfunc tty_unlock_pair(struct tty_struct *tty, - struct tty_struct *tty2) -{ - tty_unlock(tty); - if (tty2 && tty2 != tty) - tty_unlock(tty2); -} -EXPORT_SYMBOL(tty_unlock_pair); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index a3ba776c574..4e9d2b291f4 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -239,7 +239,7 @@ int tty_port_block_til_ready(struct tty_port *port, /* block if port is in the process of being closed */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { - wait_event_interruptible_tty(tty, port->close_wait, + wait_event_interruptible_tty(port->close_wait, !(port->flags & ASYNC_CLOSING)); if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; @@ -305,9 +305,9 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } finish_wait(&port->open_wait, &wait); diff --git a/include/linux/tty.h b/include/linux/tty.h index 7f9d7df9b13..40b18d7ad92 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -268,7 +268,6 @@ struct tty_struct { struct mutex ldisc_mutex; struct tty_ldisc *ldisc; - struct mutex legacy_mutex; struct mutex termios_mutex; spinlock_t ctrl_lock; /* Termios values are protected by the termios mutex */ @@ -611,12 +610,8 @@ extern long vt_compat_ioctl(struct tty_struct *tty, /* tty_mutex.c */ /* functions for preparation of BKL removal */ -extern void __lockfunc tty_lock(struct tty_struct *tty); -extern void __lockfunc tty_unlock(struct tty_struct *tty); -extern void __lockfunc tty_lock_pair(struct tty_struct *tty, - struct tty_struct *tty2); -extern void __lockfunc tty_unlock_pair(struct tty_struct *tty, - struct tty_struct *tty2); +extern void __lockfunc tty_lock(void) __acquires(tty_lock); +extern void __lockfunc tty_unlock(void) __releases(tty_lock); /* * this shall be called only from where BTM is held (like close) @@ -631,9 +626,9 @@ extern void __lockfunc tty_unlock_pair(struct tty_struct *tty, static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, long timeout) { - tty_unlock(tty); /* tty->ops->close holds the BTM, drop it while waiting */ + tty_unlock(); /* tty->ops->close holds the BTM, drop it while waiting */ tty_wait_until_sent(tty, timeout); - tty_lock(tty); + tty_lock(); } /* @@ -648,16 +643,16 @@ static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, * * Do not use in new code. */ -#define wait_event_interruptible_tty(tty, wq, condition) \ +#define wait_event_interruptible_tty(wq, condition) \ ({ \ int __ret = 0; \ if (!(condition)) { \ - __wait_event_interruptible_tty(tty, wq, condition, __ret); \ + __wait_event_interruptible_tty(wq, condition, __ret); \ } \ __ret; \ }) -#define __wait_event_interruptible_tty(tty, wq, condition, ret) \ +#define __wait_event_interruptible_tty(wq, condition, ret) \ do { \ DEFINE_WAIT(__wait); \ \ @@ -666,9 +661,9 @@ do { \ if (condition) \ break; \ if (!signal_pending(current)) { \ - tty_unlock(tty); \ + tty_unlock(); \ schedule(); \ - tty_lock(tty); \ + tty_lock(); \ continue; \ } \ ret = -ERESTARTSYS; \ diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index aa5d73b786a..d1820ff14ae 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -710,9 +710,9 @@ static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) break; } - tty_unlock(tty); + tty_unlock(); schedule(); - tty_lock(tty); + tty_lock(); } set_current_state(TASK_RUNNING); remove_wait_queue(&dev->wait, &wait); From adc8d746caa67fff4b53ba3e5163a6cbacc3b523 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 14 Jul 2012 15:31:47 +0100 Subject: [PATCH 051/235] tty: move the termios object into the tty This will let us sort out a whole pile of tty related races. The alternative would be to keep points and refcount the termios objects. However 1. They are tiny anyway 2. Many devices don't use the stored copies 3. We can remove a pty special case Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- arch/ia64/hp/sim/simserial.c | 2 +- drivers/bluetooth/hci_ath.c | 2 +- drivers/isdn/gigaset/interface.c | 4 +- drivers/isdn/i4l/isdn_tty.c | 16 ++-- drivers/mmc/card/sdio_uart.c | 20 ++--- drivers/net/irda/irtty-sir.c | 10 +-- drivers/net/usb/hso.c | 12 ++- drivers/tty/amiserial.c | 20 ++--- drivers/tty/cyclades.c | 19 ++-- drivers/tty/hvc/hvsi_lib.c | 2 +- drivers/tty/isicom.c | 8 +- drivers/tty/moxa.c | 10 +-- drivers/tty/mxser.c | 20 ++--- drivers/tty/n_gsm.c | 8 +- drivers/tty/n_tty.c | 2 +- drivers/tty/pty.c | 23 ++--- drivers/tty/rocket.c | 18 ++-- drivers/tty/serial/bfin_uart.c | 2 +- drivers/tty/serial/crisv10.c | 26 +++--- drivers/tty/serial/ioc4_serial.c | 2 +- drivers/tty/serial/jsm/jsm_tty.c | 8 +- drivers/tty/serial/samsung.c | 2 +- drivers/tty/serial/serial_core.c | 28 +++--- drivers/tty/synclink.c | 36 ++++---- drivers/tty/synclink_gt.c | 24 ++--- drivers/tty/synclinkmp.c | 24 ++--- drivers/tty/tty_io.c | 26 ++---- drivers/tty/tty_ioctl.c | 124 +++++++++++++------------- drivers/tty/tty_ldisc.c | 10 +-- drivers/tty/tty_port.c | 6 +- drivers/tty/vt/vt.c | 4 +- drivers/usb/class/cdc-acm.c | 2 +- drivers/usb/serial/ark3116.c | 4 +- drivers/usb/serial/belkin_sa.c | 2 +- drivers/usb/serial/cp210x.c | 8 +- drivers/usb/serial/cypress_m8.c | 40 ++++----- drivers/usb/serial/digi_acceleport.c | 14 +-- drivers/usb/serial/empeg.c | 2 +- drivers/usb/serial/f81232.c | 2 +- drivers/usb/serial/ftdi_sio.c | 2 +- drivers/usb/serial/io_edgeport.c | 12 +-- drivers/usb/serial/io_ti.c | 12 +-- drivers/usb/serial/ir-usb.c | 2 +- drivers/usb/serial/iuu_phoenix.c | 28 +++--- drivers/usb/serial/keyspan.c | 6 +- drivers/usb/serial/keyspan_pda.c | 4 +- drivers/usb/serial/kl5kusb105.c | 18 ++-- drivers/usb/serial/kobil_sct.c | 14 +-- drivers/usb/serial/mct_u232.c | 4 +- drivers/usb/serial/mos7720.c | 14 +-- drivers/usb/serial/mos7840.c | 12 +-- drivers/usb/serial/oti6858.c | 10 +-- drivers/usb/serial/pl2303.c | 6 +- drivers/usb/serial/quatech2.c | 4 +- drivers/usb/serial/sierra.c | 2 +- drivers/usb/serial/spcp8x5.c | 12 +-- drivers/usb/serial/ssu100.c | 4 +- drivers/usb/serial/ti_usb_3410_5052.c | 10 +-- drivers/usb/serial/usb-serial.c | 2 +- drivers/usb/serial/usb_wwan.c | 2 +- drivers/usb/serial/whiteheat.c | 2 +- include/linux/tty.h | 44 ++++----- net/bluetooth/rfcomm/tty.c | 2 +- net/irda/ircomm/ircomm_tty.c | 12 +-- net/irda/ircomm/ircomm_tty_ioctl.c | 10 +-- 65 files changed, 408 insertions(+), 434 deletions(-) diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c index c34785dca92..1ce97f497d2 100644 --- a/arch/ia64/hp/sim/simserial.c +++ b/arch/ia64/hp/sim/simserial.c @@ -338,7 +338,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { /* Handle turning off CRTSCTS */ if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; } } diff --git a/drivers/bluetooth/hci_ath.c b/drivers/bluetooth/hci_ath.c index 12172a6a95c..0bc8a6a6a14 100644 --- a/drivers/bluetooth/hci_ath.c +++ b/drivers/bluetooth/hci_ath.c @@ -58,7 +58,7 @@ static int ath_wakeup_ar3k(struct tty_struct *tty) return status; /* Disable Automatic RTSCTS */ - memcpy(&ktermios, tty->termios, sizeof(ktermios)); + ktermios = tty->termios; ktermios.c_cflag &= ~CRTSCTS; tty_set_termios(tty, &ktermios); diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index a6d9fd2858f..f9aab749086 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -446,8 +446,8 @@ static void if_set_termios(struct tty_struct *tty, struct ktermios *old) goto out; } - iflag = tty->termios->c_iflag; - cflag = tty->termios->c_cflag; + iflag = tty->termios.c_iflag; + cflag = tty->termios.c_cflag; old_cflag = old ? old->c_cflag : cflag; gig_dbg(DEBUG_IF, "%u: iflag %x cflag %x old %x", cs->minor_index, iflag, cflag, old_cflag); diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 7bc50670d7d..7a61ef6cffa 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -1009,15 +1009,15 @@ isdn_tty_change_speed(modem_info *info) quot; int i; - if (!port->tty || !port->tty->termios) + if (!port->tty) return; - cflag = port->tty->termios->c_cflag; + cflag = port->tty->termios.c_cflag; quot = i = cflag & CBAUD; if (i & CBAUDEX) { i &= ~CBAUDEX; if (i < 1 || i > 2) - port->tty->termios->c_cflag &= ~CBAUDEX; + port->tty->termios.c_cflag &= ~CBAUDEX; else i += 15; } @@ -1097,7 +1097,7 @@ isdn_tty_shutdown(modem_info *info) #endif isdn_unlock_drivers(); info->msr &= ~UART_MSR_RI; - if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { + if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) { info->mcr &= ~(UART_MCR_DTR | UART_MCR_RTS); if (info->emu.mdmreg[REG_DTRHUP] & BIT_DTRHUP) { isdn_tty_modem_reset_regs(info, 0); @@ -1469,13 +1469,13 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) if (!old_termios) isdn_tty_change_speed(info); else { - if (tty->termios->c_cflag == old_termios->c_cflag && - tty->termios->c_ispeed == old_termios->c_ispeed && - tty->termios->c_ospeed == old_termios->c_ospeed) + if (tty->termios.c_cflag == old_termios->c_cflag && + tty->termios.c_ispeed == old_termios->c_ispeed && + tty->termios.c_ospeed == old_termios->c_ospeed) return; isdn_tty_change_speed(info); if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) + !(tty->termios.c_cflag & CRTSCTS)) tty->hw_stopped = 0; } } diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 5a2cbfac66d..372c0325c14 100644 --- a/drivers/mmc/card/sdio_uart.c +++ b/drivers/mmc/card/sdio_uart.c @@ -518,7 +518,7 @@ static void sdio_uart_check_modem_status(struct sdio_uart_port *port) if (status & UART_MSR_DCTS) { port->icount.cts++; tty = tty_port_tty_get(&port->port); - if (tty && (tty->termios->c_cflag & CRTSCTS)) { + if (tty && (tty->termios.c_cflag & CRTSCTS)) { int cts = (status & UART_MSR_CTS); if (tty->hw_stopped) { if (cts) { @@ -671,12 +671,12 @@ static int sdio_uart_activate(struct tty_port *tport, struct tty_struct *tty) port->ier = UART_IER_RLSI|UART_IER_RDI|UART_IER_RTOIE|UART_IER_UUE; port->mctrl = TIOCM_OUT2; - sdio_uart_change_speed(port, tty->termios, NULL); + sdio_uart_change_speed(port, &tty->termios, NULL); - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) sdio_uart_set_mctrl(port, TIOCM_RTS | TIOCM_DTR); - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) if (!(sdio_uart_get_mctrl(port) & TIOCM_CTS)) tty->hw_stopped = 1; @@ -850,7 +850,7 @@ static void sdio_uart_throttle(struct tty_struct *tty) { struct sdio_uart_port *port = tty->driver_data; - if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS)) + if (!I_IXOFF(tty) && !(tty->termios.c_cflag & CRTSCTS)) return; if (sdio_uart_claim_func(port) != 0) @@ -861,7 +861,7 @@ static void sdio_uart_throttle(struct tty_struct *tty) sdio_uart_start_tx(port); } - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) sdio_uart_clear_mctrl(port, TIOCM_RTS); sdio_uart_irq(port->func); @@ -872,7 +872,7 @@ static void sdio_uart_unthrottle(struct tty_struct *tty) { struct sdio_uart_port *port = tty->driver_data; - if (!I_IXOFF(tty) && !(tty->termios->c_cflag & CRTSCTS)) + if (!I_IXOFF(tty) && !(tty->termios.c_cflag & CRTSCTS)) return; if (sdio_uart_claim_func(port) != 0) @@ -887,7 +887,7 @@ static void sdio_uart_unthrottle(struct tty_struct *tty) } } - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) sdio_uart_set_mctrl(port, TIOCM_RTS); sdio_uart_irq(port->func); @@ -898,12 +898,12 @@ static void sdio_uart_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct sdio_uart_port *port = tty->driver_data; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; if (sdio_uart_claim_func(port) != 0) return; - sdio_uart_change_speed(port, tty->termios, old_termios); + sdio_uart_change_speed(port, &tty->termios, old_termios); /* Handle transition to B0 status */ if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD)) diff --git a/drivers/net/irda/irtty-sir.c b/drivers/net/irda/irtty-sir.c index 3352b2443e5..30087ca23a0 100644 --- a/drivers/net/irda/irtty-sir.c +++ b/drivers/net/irda/irtty-sir.c @@ -124,8 +124,8 @@ static int irtty_change_speed(struct sir_dev *dev, unsigned speed) tty = priv->tty; mutex_lock(&tty->termios_mutex); - old_termios = *(tty->termios); - cflag = tty->termios->c_cflag; + old_termios = tty->termios; + cflag = tty->termios.c_cflag; tty_encode_baud_rate(tty, speed, speed); if (tty->ops->set_termios) tty->ops->set_termios(tty, &old_termios); @@ -281,15 +281,15 @@ static inline void irtty_stop_receiver(struct tty_struct *tty, int stop) int cflag; mutex_lock(&tty->termios_mutex); - old_termios = *(tty->termios); - cflag = tty->termios->c_cflag; + old_termios = tty->termios; + cflag = tty->termios.c_cflag; if (stop) cflag &= ~CREAD; else cflag |= CREAD; - tty->termios->c_cflag = cflag; + tty->termios.c_cflag = cflag; if (tty->ops->set_termios) tty->ops->set_termios(tty, &old_termios); mutex_unlock(&tty->termios_mutex); diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 62f30b46fa4..7736af75e12 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -1107,7 +1107,6 @@ static void _hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) { struct hso_serial *serial = tty->driver_data; - struct ktermios *termios; if (!serial) { printk(KERN_ERR "%s: no tty structures", __func__); @@ -1119,16 +1118,15 @@ static void _hso_serial_set_termios(struct tty_struct *tty, /* * Fix up unsupported bits */ - termios = tty->termios; - termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ + tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */ - termios->c_cflag &= + tty->termios.c_cflag &= ~(CSIZE /* no size */ | PARENB /* disable parity bit */ | CBAUD /* clear current baud rate */ | CBAUDEX); /* clear current buad rate */ - termios->c_cflag |= CS8; /* character size 8 bits */ + tty->termios.c_cflag |= CS8; /* character size 8 bits */ /* baud rate 115200 */ tty_encode_baud_rate(tty, 115200, 115200); @@ -1425,14 +1423,14 @@ static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old) if (old) D5("Termios called with: cflags new[%d] - old[%d]", - tty->termios->c_cflag, old->c_cflag); + tty->termios.c_cflag, old->c_cflag); /* the actual setup */ spin_lock_irqsave(&serial->serial_lock, flags); if (serial->port.count) _hso_serial_set_termios(tty, old); else - tty->termios = old; + tty->termios = *old; spin_unlock_irqrestore(&serial->serial_lock, flags); /* done */ diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 6cc4358f68c..0e8441e73ee 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -646,7 +646,7 @@ static void shutdown(struct tty_struct *tty, struct serial_state *info) custom.adkcon = AC_UARTBRK; mb(); - if (tty->termios->c_cflag & HUPCL) + if (tty->termios.c_cflag & HUPCL) info->MCR &= ~(SER_DTR|SER_RTS); rtsdtr_ctrl(info->MCR); @@ -670,7 +670,7 @@ static void change_speed(struct tty_struct *tty, struct serial_state *info, int bits; unsigned long flags; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* Byte size is always 8 bits plus parity bit if requested */ @@ -707,8 +707,8 @@ static void change_speed(struct tty_struct *tty, struct serial_state *info, /* If the quotient is zero refuse the change */ if (!quot && old_termios) { /* FIXME: Will need updating for new tty in the end */ - tty->termios->c_cflag &= ~CBAUD; - tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD); + tty->termios.c_cflag &= ~CBAUD; + tty->termios.c_cflag |= (old_termios->c_cflag & CBAUD); baud = tty_get_baud_rate(tty); if (!baud) baud = 9600; @@ -984,7 +984,7 @@ static void rs_throttle(struct tty_struct * tty) if (I_IXOFF(tty)) rs_send_xchar(tty, STOP_CHAR(tty)); - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) info->MCR &= ~SER_RTS; local_irq_save(flags); @@ -1012,7 +1012,7 @@ static void rs_unthrottle(struct tty_struct * tty) else rs_send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) info->MCR |= SER_RTS; local_irq_save(flags); rtsdtr_ctrl(info->MCR); @@ -1330,7 +1330,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct serial_state *info = tty->driver_data; unsigned long flags; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; change_speed(tty, info, old_termios); @@ -1347,7 +1347,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) { info->MCR |= SER_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { info->MCR |= SER_RTS; } @@ -1358,7 +1358,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle turning off CRTSCTS */ if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; rs_start(tty); } @@ -1371,7 +1371,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) * or not. Hence, this may change..... */ if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) + (tty->termios.c_cflag & CLOCAL)) wake_up_interruptible(&info->open_wait); #endif } diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index cff546839db..e77db714ab2 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1459,7 +1459,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty) info->port.xmit_buf = NULL; free_page((unsigned long)temp); } - if (tty->termios->c_cflag & HUPCL) + if (tty->termios.c_cflag & HUPCL) cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR); cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR); @@ -1488,7 +1488,7 @@ static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty) free_page((unsigned long)temp); } - if (tty->termios->c_cflag & HUPCL) + if (tty->termios.c_cflag & HUPCL) tty_port_lower_dtr_rts(&info->port); set_bit(TTY_IO_ERROR, &tty->flags); @@ -1999,14 +1999,11 @@ static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty) int baud, baud_rate = 0; int i; - if (!tty->termios) /* XXX can this happen at all? */ - return; - if (info->line == -1) return; - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; /* * Set up the tty->alt_speed kludge @@ -2825,7 +2822,7 @@ static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) cy_set_line_char(info, tty); if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; cy_start(tty); } @@ -2837,7 +2834,7 @@ static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios) * or not. Hence, this may change..... */ if (!(old_termios->c_cflag & CLOCAL) && - (tty->termios->c_cflag & CLOCAL)) + (tty->termios.c_cflag & CLOCAL)) wake_up_interruptible(&info->port.open_wait); #endif } /* cy_set_termios */ @@ -2899,7 +2896,7 @@ static void cy_throttle(struct tty_struct *tty) info->throttle = 1; } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { if (!cy_is_Z(card)) { spin_lock_irqsave(&card->card_lock, flags); cyy_change_rts_dtr(info, 0, TIOCM_RTS); @@ -2938,7 +2935,7 @@ static void cy_unthrottle(struct tty_struct *tty) cy_send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { card = info->card; if (!cy_is_Z(card)) { spin_lock_irqsave(&card->card_lock, flags); diff --git a/drivers/tty/hvc/hvsi_lib.c b/drivers/tty/hvc/hvsi_lib.c index 59c135dd5d2..3396eb9d57a 100644 --- a/drivers/tty/hvc/hvsi_lib.c +++ b/drivers/tty/hvc/hvsi_lib.c @@ -400,7 +400,7 @@ void hvsilib_close(struct hvsi_priv *pv, struct hvc_struct *hp) spin_unlock_irqrestore(&hp->lock, flags); /* Clear our own DTR */ - if (!pv->tty || (pv->tty->termios->c_cflag & HUPCL)) + if (!pv->tty || (pv->tty->termios.c_cflag & HUPCL)) hvsilib_write_mctrl(pv, 0); /* Tear down the connection */ diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c index e1235accab7..d593a7d18ad 100644 --- a/drivers/tty/isicom.c +++ b/drivers/tty/isicom.c @@ -702,7 +702,7 @@ static void isicom_config_port(struct tty_struct *tty) /* 1,2,3,4 => 57.6, 115.2, 230, 460 kbps resp. */ if (baud < 1 || baud > 4) - tty->termios->c_cflag &= ~CBAUDEX; + tty->termios.c_cflag &= ~CBAUDEX; else baud += 15; } @@ -1196,8 +1196,8 @@ static void isicom_set_termios(struct tty_struct *tty, if (isicom_paranoia_check(port, tty->name, "isicom_set_termios")) return; - if (tty->termios->c_cflag == old_termios->c_cflag && - tty->termios->c_iflag == old_termios->c_iflag) + if (tty->termios.c_cflag == old_termios->c_cflag && + tty->termios.c_iflag == old_termios->c_iflag) return; spin_lock_irqsave(&port->card->card_lock, flags); @@ -1205,7 +1205,7 @@ static void isicom_set_termios(struct tty_struct *tty, spin_unlock_irqrestore(&port->card->card_lock, flags); if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; isicom_start(tty); } diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 324467d28a5..89cc9344325 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -367,10 +367,10 @@ static int moxa_ioctl(struct tty_struct *tty, tmp.dcd = 1; ttyp = tty_port_tty_get(&p->port); - if (!ttyp || !ttyp->termios) + if (!ttyp) tmp.cflag = p->cflag; else - tmp.cflag = ttyp->termios->c_cflag; + tmp.cflag = ttyp->termios.c_cflag; tty_kref_put(ttyp); copy: if (copy_to_user(argm, &tmp, sizeof(tmp))) @@ -1178,7 +1178,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) mutex_lock(&ch->port.mutex); if (!(ch->port.flags & ASYNC_INITIALIZED)) { ch->statusflags = 0; - moxa_set_tty_param(tty, tty->termios); + moxa_set_tty_param(tty, &tty->termios); MoxaPortLineCtrl(ch, 1, 1); MoxaPortEnable(ch); MoxaSetFifo(ch, ch->type == PORT_16550A); @@ -1193,7 +1193,7 @@ static int moxa_open(struct tty_struct *tty, struct file *filp) static void moxa_close(struct tty_struct *tty, struct file *filp) { struct moxa_port *ch = tty->driver_data; - ch->cflag = tty->termios->c_cflag; + ch->cflag = tty->termios.c_cflag; tty_port_close(&ch->port, tty, filp); } @@ -1464,7 +1464,7 @@ static void moxa_poll(unsigned long ignored) static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) { - register struct ktermios *ts = tty->termios; + register struct ktermios *ts = &tty->termios; struct moxa_port *ch = tty->driver_data; int rts, cts, txflow, rxflow, xany, baud; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 90cc680c4f0..c162ee93116 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -643,7 +643,7 @@ static int mxser_change_speed(struct tty_struct *tty, int ret = 0; unsigned char status; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; if (!info->ioaddr) return ret; @@ -1520,10 +1520,10 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp) tty = tty_port_tty_get(port); - if (!tty || !tty->termios) + if (!tty) ms.cflag = ip->normal_termios.c_cflag; else - ms.cflag = tty->termios->c_cflag; + ms.cflag = tty->termios.c_cflag; tty_kref_put(tty); spin_lock_irq(&ip->slock); status = inb(ip->ioaddr + UART_MSR); @@ -1589,13 +1589,13 @@ static int mxser_ioctl_special(unsigned int cmd, void __user *argp) tty = tty_port_tty_get(&ip->port); - if (!tty || !tty->termios) { + if (!tty) { cflag = ip->normal_termios.c_cflag; iflag = ip->normal_termios.c_iflag; me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios); } else { - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; me->baudrate[p] = tty_get_baud_rate(tty); } tty_kref_put(tty); @@ -1853,7 +1853,7 @@ static void mxser_stoprx(struct tty_struct *tty) } } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { info->MCR &= ~UART_MCR_RTS; outb(info->MCR, info->ioaddr + UART_MCR); } @@ -1890,7 +1890,7 @@ static void mxser_unthrottle(struct tty_struct *tty) } } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { info->MCR |= UART_MCR_RTS; outb(info->MCR, info->ioaddr + UART_MCR); } @@ -1939,14 +1939,14 @@ static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termi spin_unlock_irqrestore(&info->slock, flags); if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; mxser_start(tty); } /* Handle sw stopped */ if ((old_termios->c_iflag & IXON) && - !(tty->termios->c_iflag & IXON)) { + !(tty->termios.c_iflag & IXON)) { tty->stopped = 0; if (info->board->chip_flag) { diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c43b683b6eb..7a4bf3053a1 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1061,7 +1061,7 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, /* Carrier drop -> hangup */ if (tty) { if ((mlines & TIOCM_CD) == 0 && (dlci->modem_rx & TIOCM_CD)) - if (!(tty->termios->c_cflag & CLOCAL)) + if (!(tty->termios.c_cflag & CLOCAL)) tty_hangup(tty); if (brk & 0x01) tty_insert_flip_char(tty, 0, TTY_BREAK); @@ -3043,13 +3043,13 @@ static void gsmtty_set_termios(struct tty_struct *tty, struct ktermios *old) the RPN control message. This however rapidly gets nasty as we then have to remap modem signals each way according to whether our virtual cable is null modem etc .. */ - tty_termios_copy_hw(tty->termios, old); + tty_termios_copy_hw(&tty->termios, old); } static void gsmtty_throttle(struct tty_struct *tty) { struct gsm_dlci *dlci = tty->driver_data; - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) dlci->modem_tx &= ~TIOCM_DTR; dlci->throttled = 1; /* Send an MSC with DTR cleared */ @@ -3059,7 +3059,7 @@ static void gsmtty_throttle(struct tty_struct *tty) static void gsmtty_unthrottle(struct tty_struct *tty) { struct gsm_dlci *dlci = tty->driver_data; - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) dlci->modem_tx |= TIOCM_DTR; dlci->throttled = 0; /* Send an MSC with DTR set */ diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 4f34491b65c..101790cea4a 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1466,7 +1466,7 @@ static void n_tty_set_termios(struct tty_struct *tty, struct ktermios *old) BUG_ON(!tty); if (old) - canon_change = (old->c_lflag ^ tty->termios->c_lflag) & ICANON; + canon_change = (old->c_lflag ^ tty->termios.c_lflag) & ICANON; if (canon_change) { memset(&tty->read_flags, 0, sizeof tty->read_flags); tty->canon_head = tty->read_tail; diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index b50fc1c0141..5ad7ccc49f7 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -231,8 +231,8 @@ out: static void pty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { - tty->termios->c_cflag &= ~(CSIZE | PARENB); - tty->termios->c_cflag |= (CS8 | CREAD); + tty->termios.c_cflag &= ~(CSIZE | PARENB); + tty->termios.c_cflag |= (CS8 | CREAD); } /** @@ -315,18 +315,10 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, driver->other->ttys[idx] = o_tty; driver->ttys[idx] = tty; } else { - tty->termios = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); - if (tty->termios == NULL) - goto err_deinit_tty; - *tty->termios = driver->init_termios; - tty->termios_locked = tty->termios + 1; - - o_tty->termios = kzalloc(sizeof(struct ktermios[2]), - GFP_KERNEL); - if (o_tty->termios == NULL) - goto err_free_termios; - *o_tty->termios = driver->other->init_termios; - o_tty->termios_locked = o_tty->termios + 1; + memset(&tty->termios_locked, 0, sizeof(tty->termios_locked)); + tty->termios = driver->init_termios; + memset(&o_tty->termios_locked, 0, sizeof(tty->termios_locked)); + o_tty->termios = driver->other->init_termios; } /* @@ -349,8 +341,6 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, err_free_termios: if (legacy) tty_free_termios(tty); - else - kfree(tty->termios); err_deinit_tty: deinitialize_tty_struct(o_tty); module_put(o_tty->driver->owner); @@ -541,7 +531,6 @@ static void pty_unix98_shutdown(struct tty_struct *tty) { tty_driver_remove_tty(tty->driver, tty); /* We have our own method as we don't use the tty index */ - kfree(tty->termios); } /* We have no need to install and remove our tty objects as devpts does all diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 777d5f9cf6c..016984a460e 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -720,7 +720,7 @@ static void configure_r_port(struct tty_struct *tty, struct r_port *info, unsigned rocketMode; int bits, baud, divisor; CHANNEL_t *cp; - struct ktermios *t = tty->termios; + struct ktermios *t = &tty->termios; cp = &info->channel; cflag = t->c_cflag; @@ -978,7 +978,7 @@ static int rp_open(struct tty_struct *tty, struct file *filp) tty->alt_speed = 460800; configure_r_port(tty, info, NULL); - if (tty->termios->c_cflag & CBAUD) { + if (tty->termios.c_cflag & CBAUD) { sSetDTR(cp); sSetRTS(cp); } @@ -1089,35 +1089,35 @@ static void rp_set_termios(struct tty_struct *tty, if (rocket_paranoia_check(info, "rp_set_termios")) return; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* * This driver doesn't support CS5 or CS6 */ if (((cflag & CSIZE) == CS5) || ((cflag & CSIZE) == CS6)) - tty->termios->c_cflag = + tty->termios.c_cflag = ((cflag & ~CSIZE) | (old_termios->c_cflag & CSIZE)); /* Or CMSPAR */ - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; configure_r_port(tty, info, old_termios); cp = &info->channel; /* Handle transition to B0 status */ - if ((old_termios->c_cflag & CBAUD) && !(tty->termios->c_cflag & CBAUD)) { + if ((old_termios->c_cflag & CBAUD) && !(tty->termios.c_cflag & CBAUD)) { sClrDTR(cp); sClrRTS(cp); } /* Handle transition away from B0 status */ - if (!(old_termios->c_cflag & CBAUD) && (tty->termios->c_cflag & CBAUD)) { - if (!tty->hw_stopped || !(tty->termios->c_cflag & CRTSCTS)) + if (!(old_termios->c_cflag & CBAUD) && (tty->termios.c_cflag & CBAUD)) { + if (!tty->hw_stopped || !(tty->termios.c_cflag & CRTSCTS)) sSetRTS(cp); sSetDTR(cp); } - if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { + if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; rp_start(tty); } diff --git a/drivers/tty/serial/bfin_uart.c b/drivers/tty/serial/bfin_uart.c index bd97db23985..9242d56ba26 100644 --- a/drivers/tty/serial/bfin_uart.c +++ b/drivers/tty/serial/bfin_uart.c @@ -182,7 +182,7 @@ static void bfin_serial_start_tx(struct uart_port *port) * To avoid losting RX interrupt, we reset IR function * before sending data. */ - if (tty->termios->c_line == N_IRDA) + if (tty->termios.c_line == N_IRDA) bfin_serial_reset_irda(port); #ifdef CONFIG_SERIAL_BFIN_DMA diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 80b6b1b1f72..6b705b24352 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -955,7 +955,7 @@ static const struct control_pins e100_modem_pins[NR_PORTS] = /* Calculate the chartime depending on baudrate, numbor of bits etc. */ static void update_char_time(struct e100_serial * info) { - tcflag_t cflags = info->port.tty->termios->c_cflag; + tcflag_t cflags = info->port.tty->termios.c_cflag; int bits; /* calc. number of bits / data byte */ @@ -1473,7 +1473,7 @@ rs_stop(struct tty_struct *tty) xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(info->port.tty)); xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, stop); - if (tty->termios->c_iflag & IXON ) { + if (tty->termios.c_iflag & IXON ) { xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); } @@ -1496,7 +1496,7 @@ rs_start(struct tty_struct *tty) info->xmit.tail,SERIAL_XMIT_SIZE))); xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(tty)); xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable); - if (tty->termios->c_iflag & IXON ) { + if (tty->termios.c_iflag & IXON ) { xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); } @@ -2929,7 +2929,7 @@ shutdown(struct e100_serial * info) descr[i].buf = 0; } - if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL)) { + if (!info->port.tty || (info->port.tty->termios.c_cflag & HUPCL)) { /* hang up DTR and RTS if HUPCL is enabled */ e100_dtr(info, 0); e100_rts(info, 0); /* could check CRTSCTS before doing this */ @@ -2953,12 +2953,12 @@ change_speed(struct e100_serial *info) unsigned long flags; /* first some safety checks */ - if (!info->port.tty || !info->port.tty->termios) + if (!info->port.tty) return; if (!info->ioport) return; - cflag = info->port.tty->termios->c_cflag; + cflag = info->port.tty->termios.c_cflag; /* possibly, the tx/rx should be disabled first to do this safely */ @@ -3088,7 +3088,7 @@ change_speed(struct e100_serial *info) info->ioport[REG_REC_CTRL] = info->rx_ctrl; xoff = IO_FIELD(R_SERIAL0_XOFF, xoff_char, STOP_CHAR(info->port.tty)); xoff |= IO_STATE(R_SERIAL0_XOFF, tx_stop, enable); - if (info->port.tty->termios->c_iflag & IXON ) { + if (info->port.tty->termios.c_iflag & IXON ) { DFLOW(DEBUG_LOG(info->line, "FLOW XOFF enabled 0x%02X\n", STOP_CHAR(info->port.tty))); xoff |= IO_STATE(R_SERIAL0_XOFF, auto_xoff, enable); @@ -3355,7 +3355,7 @@ rs_throttle(struct tty_struct * tty) DFLOW(DEBUG_LOG(info->line,"rs_throttle %lu\n", tty->ldisc.chars_in_buffer(tty))); /* Do RTS before XOFF since XOFF might take some time */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { /* Turn off RTS line */ e100_rts(info, 0); } @@ -3377,7 +3377,7 @@ rs_unthrottle(struct tty_struct * tty) DFLOW(DEBUG_LOG(info->line,"rs_unthrottle ldisc %d\n", tty->ldisc.chars_in_buffer(tty))); DFLOW(DEBUG_LOG(info->line,"rs_unthrottle flip.count: %i\n", tty->flip.count)); /* Do RTS before XOFF since XOFF might take some time */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { /* Assert RTS line */ e100_rts(info, 1); } @@ -3748,7 +3748,7 @@ rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle turning off CRTSCTS */ if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; rs_start(tty); } @@ -3815,7 +3815,7 @@ rs_close(struct tty_struct *tty, struct file * filp) * separate termios for callout and dialin. */ if (info->flags & ASYNC_NORMAL_ACTIVE) - info->normal_termios = *tty->termios; + info->normal_termios = tty->termios; /* * Now we wait for the transmit buffer to clear; and we notify * the line discipline to only process XON/XOFF characters. @@ -3998,7 +3998,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, return 0; } - if (tty->termios->c_cflag & CLOCAL) { + if (tty->termios.c_cflag & CLOCAL) { do_clocal = 1; } @@ -4219,7 +4219,7 @@ rs_open(struct tty_struct *tty, struct file * filp) } if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) { - *tty->termios = info->normal_termios; + tty->termios = info->normal_termios; change_speed(info); } diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c index e16894fb2ca..cc5aca78ad9 100644 --- a/drivers/tty/serial/ioc4_serial.c +++ b/drivers/tty/serial/ioc4_serial.c @@ -1803,7 +1803,7 @@ static inline int ic4_startup_local(struct uart_port *the_port) ioc4_set_proto(port, the_port->mapbase); /* set the speed of the serial port */ - ioc4_change_speed(the_port, state->port.tty->termios, + ioc4_change_speed(the_port, &state->port.tty->termios, (struct ktermios *)0); return 0; diff --git a/drivers/tty/serial/jsm/jsm_tty.c b/drivers/tty/serial/jsm/jsm_tty.c index 434bd881fca..71397961773 100644 --- a/drivers/tty/serial/jsm/jsm_tty.c +++ b/drivers/tty/serial/jsm/jsm_tty.c @@ -161,7 +161,7 @@ static void jsm_tty_send_xchar(struct uart_port *port, char ch) struct ktermios *termios; spin_lock_irqsave(&port->lock, lock_flags); - termios = port->state->port.tty->termios; + termios = &port->state->port.tty->termios; if (ch == termios->c_cc[VSTART]) channel->ch_bd->bd_ops->send_start_character(channel); @@ -250,7 +250,7 @@ static int jsm_tty_open(struct uart_port *port) channel->ch_cached_lsr = 0; channel->ch_stops_sent = 0; - termios = port->state->port.tty->termios; + termios = &port->state->port.tty->termios; channel->ch_c_cflag = termios->c_cflag; channel->ch_c_iflag = termios->c_iflag; channel->ch_c_oflag = termios->c_oflag; @@ -283,7 +283,7 @@ static void jsm_tty_close(struct uart_port *port) jsm_printk(CLOSE, INFO, &channel->ch_bd->pci_dev, "start\n"); bd = channel->ch_bd; - ts = port->state->port.tty->termios; + ts = &port->state->port.tty->termios; channel->ch_flags &= ~(CH_STOPI); @@ -567,7 +567,7 @@ void jsm_input(struct jsm_channel *ch) *input data and return immediately. */ if (!tp || - !(tp->termios->c_cflag & CREAD) ) { + !(tp->termios.c_cflag & CREAD) ) { jsm_printk(READ, INFO, &ch->ch_bd->pci_dev, "input. dropping %d bytes on port %d...\n", data_len, ch->ch_portnum); diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index d57f165d6be..5c5e7e09f23 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1035,7 +1035,7 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, if (tty == NULL) goto exit; - termios = tty->termios; + termios = &tty->termios; if (termios == NULL) { printk(KERN_WARNING "%s: no termios?\n", __func__); diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index a21dc8e3b7c..d98b1bd407f 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -159,7 +159,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, retval = uport->ops->startup(uport); if (retval == 0) { if (uart_console(uport) && uport->cons->cflag) { - tty->termios->c_cflag = uport->cons->cflag; + tty->termios.c_cflag = uport->cons->cflag; uport->cons->cflag = 0; } /* @@ -172,7 +172,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, * Setup the RTS and DTR signals once the * port is open and ready to respond. */ - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR); } @@ -240,7 +240,7 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state) /* * Turn off DTR and RTS early. */ - if (!tty || (tty->termios->c_cflag & HUPCL)) + if (!tty || (tty->termios.c_cflag & HUPCL)) uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS); uart_port_shutdown(port); @@ -440,10 +440,10 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state, * If we have no tty, termios, or the port does not exist, * then we can't set the parameters for this port. */ - if (!tty || !tty->termios || uport->type == PORT_UNKNOWN) + if (!tty || uport->type == PORT_UNKNOWN) return; - termios = tty->termios; + termios = &tty->termios; /* * Set flags based on termios cflag @@ -614,7 +614,7 @@ static void uart_throttle(struct tty_struct *tty) if (I_IXOFF(tty)) uart_send_xchar(tty, STOP_CHAR(tty)); - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) uart_clear_mctrl(state->uart_port, TIOCM_RTS); } @@ -630,7 +630,7 @@ static void uart_unthrottle(struct tty_struct *tty) uart_send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) + if (tty->termios.c_cflag & CRTSCTS) uart_set_mctrl(port, TIOCM_RTS); } @@ -1187,7 +1187,7 @@ static void uart_set_ldisc(struct tty_struct *tty) struct uart_port *uport = state->uart_port; if (uport->ops->set_ldisc) - uport->ops->set_ldisc(uport, tty->termios->c_line); + uport->ops->set_ldisc(uport, tty->termios.c_line); } static void uart_set_termios(struct tty_struct *tty, @@ -1195,7 +1195,7 @@ static void uart_set_termios(struct tty_struct *tty, { struct uart_state *state = tty->driver_data; unsigned long flags; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; /* @@ -1206,9 +1206,9 @@ static void uart_set_termios(struct tty_struct *tty, */ #define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK)) if ((cflag ^ old_termios->c_cflag) == 0 && - tty->termios->c_ospeed == old_termios->c_ospeed && - tty->termios->c_ispeed == old_termios->c_ispeed && - RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0) { + tty->termios.c_ospeed == old_termios->c_ospeed && + tty->termios.c_ispeed == old_termios->c_ispeed && + RELEVANT_IFLAG(tty->termios.c_iflag ^ old_termios->c_iflag) == 0) { return; } @@ -1960,8 +1960,8 @@ int uart_resume_port(struct uart_driver *drv, struct uart_port *uport) /* * If that's unset, use the tty termios setting. */ - if (port->tty && port->tty->termios && termios.c_cflag == 0) - termios = *(port->tty->termios); + if (port->tty && termios.c_cflag == 0) + termios = port->tty->termios; if (console_suspend_enabled) uart_change_pm(state, 0); diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 593d40ad0a6..bdeeb3133f6 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -1840,22 +1840,22 @@ static void shutdown(struct mgsl_struct * info) usc_DisableInterrupts(info,RECEIVE_DATA + RECEIVE_STATUS + TRANSMIT_DATA + TRANSMIT_STATUS + IO_PIN + MISC ); usc_DisableDmaInterrupts(info,DICR_MASTER + DICR_TRANSMIT + DICR_RECEIVE); - + /* Disable DMAEN (Port 7, Bit 14) */ /* This disconnects the DMA request signal from the ISA bus */ /* on the ISA adapter. This has no effect for the PCI adapter */ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT15) | BIT14)); - + /* Disable INTEN (Port 6, Bit12) */ /* This disconnects the IRQ request signal to the ISA bus */ /* on the ISA adapter. This has no effect for the PCI adapter */ usc_OutReg(info, PCR, (u16)((usc_InReg(info, PCR) | BIT13) | BIT12)); - - if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { + + if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) { info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); usc_set_serial_signals(info); } - + spin_unlock_irqrestore(&info->irq_spinlock,flags); mgsl_release_resources(info); @@ -1895,7 +1895,7 @@ static void mgsl_program_hw(struct mgsl_struct *info) usc_EnableInterrupts(info, IO_PIN); usc_get_serial_signals(info); - if (info->netcount || info->port.tty->termios->c_cflag & CREAD) + if (info->netcount || info->port.tty->termios.c_cflag & CREAD) usc_start_receiver(info); spin_unlock_irqrestore(&info->irq_spinlock,flags); @@ -1908,14 +1908,14 @@ static void mgsl_change_params(struct mgsl_struct *info) unsigned cflag; int bits_per_char; - if (!info->port.tty || !info->port.tty->termios) + if (!info->port.tty) return; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):mgsl_change_params(%s)\n", __FILE__,__LINE__, info->device_name ); - cflag = info->port.tty->termios->c_cflag; + cflag = info->port.tty->termios.c_cflag; /* if B0 rate (hangup) specified then negate DTR and RTS */ /* otherwise assert DTR and RTS */ @@ -2367,8 +2367,8 @@ static void mgsl_throttle(struct tty_struct * tty) if (I_IXOFF(tty)) mgsl_send_xchar(tty, STOP_CHAR(tty)); - - if (tty->termios->c_cflag & CRTSCTS) { + + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->irq_spinlock,flags); info->serial_signals &= ~SerialSignal_RTS; usc_set_serial_signals(info); @@ -2401,8 +2401,8 @@ static void mgsl_unthrottle(struct tty_struct * tty) else mgsl_send_xchar(tty, START_CHAR(tty)); } - - if (tty->termios->c_cflag & CRTSCTS) { + + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->irq_spinlock,flags); info->serial_signals |= SerialSignal_RTS; usc_set_serial_signals(info); @@ -3045,7 +3045,7 @@ static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termio /* Handle transition to B0 status */ if (old_termios->c_cflag & CBAUD && - !(tty->termios->c_cflag & CBAUD)) { + !(tty->termios.c_cflag & CBAUD)) { info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); spin_lock_irqsave(&info->irq_spinlock,flags); usc_set_serial_signals(info); @@ -3054,9 +3054,9 @@ static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termio /* Handle transition away from B0 status */ if (!(old_termios->c_cflag & CBAUD) && - tty->termios->c_cflag & CBAUD) { + tty->termios.c_cflag & CBAUD) { info->serial_signals |= SerialSignal_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { info->serial_signals |= SerialSignal_RTS; } @@ -3067,7 +3067,7 @@ static void mgsl_set_termios(struct tty_struct *tty, struct ktermios *old_termio /* Handle turning off CRTSCTS */ if (old_termios->c_cflag & CRTSCTS && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; mgsl_start(tty); } @@ -3287,7 +3287,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, return 0; } - if (tty->termios->c_cflag & CLOCAL) + if (tty->termios.c_cflag & CLOCAL) do_clocal = true; /* Wait for carrier detect and the line to become @@ -3313,7 +3313,7 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, port->blocked_open++; while (1) { - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) tty_port_raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE); diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index aa1debf97cc..f02d18a391e 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -785,7 +785,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle transition to B0 status */ if (old_termios->c_cflag & CBAUD && - !(tty->termios->c_cflag & CBAUD)) { + !(tty->termios.c_cflag & CBAUD)) { info->signals &= ~(SerialSignal_RTS + SerialSignal_DTR); spin_lock_irqsave(&info->lock,flags); set_signals(info); @@ -794,9 +794,9 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle transition away from B0 status */ if (!(old_termios->c_cflag & CBAUD) && - tty->termios->c_cflag & CBAUD) { + tty->termios.c_cflag & CBAUD) { info->signals |= SerialSignal_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { info->signals |= SerialSignal_RTS; } @@ -807,7 +807,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle turning off CRTSCTS */ if (old_termios->c_cflag & CRTSCTS && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; tx_release(tty); } @@ -1372,7 +1372,7 @@ static void throttle(struct tty_struct * tty) DBGINFO(("%s throttle\n", info->device_name)); if (I_IXOFF(tty)) send_xchar(tty, STOP_CHAR(tty)); - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->signals &= ~SerialSignal_RTS; set_signals(info); @@ -1397,7 +1397,7 @@ static void unthrottle(struct tty_struct * tty) else send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->signals |= SerialSignal_RTS; set_signals(info); @@ -2493,7 +2493,7 @@ static void shutdown(struct slgt_info *info) slgt_irq_off(info, IRQ_ALL | IRQ_MASTER); - if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { + if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) { info->signals &= ~(SerialSignal_DTR + SerialSignal_RTS); set_signals(info); } @@ -2534,7 +2534,7 @@ static void program_hw(struct slgt_info *info) get_signals(info); if (info->netcount || - (info->port.tty && info->port.tty->termios->c_cflag & CREAD)) + (info->port.tty && info->port.tty->termios.c_cflag & CREAD)) rx_start(info); spin_unlock_irqrestore(&info->lock,flags); @@ -2548,11 +2548,11 @@ static void change_params(struct slgt_info *info) unsigned cflag; int bits_per_char; - if (!info->port.tty || !info->port.tty->termios) + if (!info->port.tty) return; DBGINFO(("%s change_params\n", info->device_name)); - cflag = info->port.tty->termios->c_cflag; + cflag = info->port.tty->termios.c_cflag; /* if B0 rate (hangup) specified then negate DTR and RTS */ /* otherwise assert DTR and RTS */ @@ -3292,7 +3292,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, return 0; } - if (tty->termios->c_cflag & CLOCAL) + if (tty->termios.c_cflag & CLOCAL) do_clocal = true; /* Wait for carrier detect and the line to become @@ -3314,7 +3314,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, port->blocked_open++; while (1) { - if ((tty->termios->c_cflag & CBAUD)) + if ((tty->termios.c_cflag & CBAUD)) tty_port_raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE); diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index a3dddc12d2f..ae75a3c21fd 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -873,7 +873,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle transition to B0 status */ if (old_termios->c_cflag & CBAUD && - !(tty->termios->c_cflag & CBAUD)) { + !(tty->termios.c_cflag & CBAUD)) { info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); spin_lock_irqsave(&info->lock,flags); set_signals(info); @@ -882,9 +882,9 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle transition away from B0 status */ if (!(old_termios->c_cflag & CBAUD) && - tty->termios->c_cflag & CBAUD) { + tty->termios.c_cflag & CBAUD) { info->serial_signals |= SerialSignal_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { info->serial_signals |= SerialSignal_RTS; } @@ -895,7 +895,7 @@ static void set_termios(struct tty_struct *tty, struct ktermios *old_termios) /* Handle turning off CRTSCTS */ if (old_termios->c_cflag & CRTSCTS && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; tx_release(tty); } @@ -1473,7 +1473,7 @@ static void throttle(struct tty_struct * tty) if (I_IXOFF(tty)) send_xchar(tty, STOP_CHAR(tty)); - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->serial_signals &= ~SerialSignal_RTS; set_signals(info); @@ -1502,7 +1502,7 @@ static void unthrottle(struct tty_struct * tty) send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->serial_signals |= SerialSignal_RTS; set_signals(info); @@ -2708,7 +2708,7 @@ static void shutdown(SLMP_INFO * info) reset_port(info); - if (!info->port.tty || info->port.tty->termios->c_cflag & HUPCL) { + if (!info->port.tty || info->port.tty->termios.c_cflag & HUPCL) { info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); set_signals(info); } @@ -2749,7 +2749,7 @@ static void program_hw(SLMP_INFO *info) get_signals(info); - if (info->netcount || (info->port.tty && info->port.tty->termios->c_cflag & CREAD) ) + if (info->netcount || (info->port.tty && info->port.tty->termios.c_cflag & CREAD) ) rx_start(info); spin_unlock_irqrestore(&info->lock,flags); @@ -2762,14 +2762,14 @@ static void change_params(SLMP_INFO *info) unsigned cflag; int bits_per_char; - if (!info->port.tty || !info->port.tty->termios) + if (!info->port.tty) return; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):%s change_params()\n", __FILE__,__LINE__, info->device_name ); - cflag = info->port.tty->termios->c_cflag; + cflag = info->port.tty->termios.c_cflag; /* if B0 rate (hangup) specified then negate DTR and RTS */ /* otherwise assert DTR and RTS */ @@ -3306,7 +3306,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, return 0; } - if (tty->termios->c_cflag & CLOCAL) + if (tty->termios.c_cflag & CLOCAL) do_clocal = true; /* Wait for carrier detect and the line to become @@ -3332,7 +3332,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, port->blocked_open++; while (1) { - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) tty_port_raise_dtr_rts(port); set_current_state(TASK_INTERRUPTIBLE); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index ac96f74573d..cfd12da8121 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1251,19 +1251,17 @@ int tty_init_termios(struct tty_struct *tty) tp = tty->driver->termios[idx]; if (tp == NULL) { - tp = kzalloc(sizeof(struct ktermios[2]), GFP_KERNEL); + tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL); if (tp == NULL) return -ENOMEM; - memcpy(tp, &tty->driver->init_termios, - sizeof(struct ktermios)); + *tp = tty->driver->init_termios; tty->driver->termios[idx] = tp; } - tty->termios = tp; - tty->termios_locked = tp + 1; + tty->termios = *tp; /* Compatibility until drivers always set this */ - tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios); - tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios); + tty->termios.c_ispeed = tty_termios_input_baud_rate(&tty->termios); + tty->termios.c_ospeed = tty_termios_baud_rate(&tty->termios); return 0; } EXPORT_SYMBOL_GPL(tty_init_termios); @@ -1442,10 +1440,12 @@ void tty_free_termios(struct tty_struct *tty) /* Kill this flag and push into drivers for locking etc */ if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) { /* FIXME: Locking on ->termios array */ - tp = tty->termios; + tp = tty->driver->termios[idx]; tty->driver->termios[idx] = NULL; kfree(tp); } + else + *tty->driver->termios[idx] = tty->termios; } EXPORT_SYMBOL(tty_free_termios); @@ -1575,22 +1575,12 @@ static int tty_release_checks(struct tty_struct *tty, struct tty_struct *o_tty, __func__, idx, tty->name); return -1; } - if (tty->termios != tty->driver->termios[idx]) { - printk(KERN_DEBUG "%s: driver.termios[%d] not termios for (%s)\n", - __func__, idx, tty->name); - return -1; - } if (tty->driver->other) { if (o_tty != tty->driver->other->ttys[idx]) { printk(KERN_DEBUG "%s: other->table[%d] not o_tty for (%s)\n", __func__, idx, tty->name); return -1; } - if (o_tty->termios != tty->driver->other->termios[idx]) { - printk(KERN_DEBUG "%s: other->termios[%d] not o_termios for (%s)\n", - __func__, idx, tty->name); - return -1; - } if (o_tty->link != tty) { printk(KERN_DEBUG "%s: bad pty pointers\n", __func__); return -1; diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index a1b9a2f6856..d3c2bda1e46 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -410,7 +410,7 @@ EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate); void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud) { - tty_termios_encode_baud_rate(tty->termios, ibaud, obaud); + tty_termios_encode_baud_rate(&tty->termios, ibaud, obaud); } EXPORT_SYMBOL_GPL(tty_encode_baud_rate); @@ -427,7 +427,7 @@ EXPORT_SYMBOL_GPL(tty_encode_baud_rate); speed_t tty_get_baud_rate(struct tty_struct *tty) { - speed_t baud = tty_termios_baud_rate(tty->termios); + speed_t baud = tty_termios_baud_rate(&tty->termios); if (baud == 38400 && tty->alt_speed) { if (!tty->warned) { @@ -509,14 +509,14 @@ int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios) /* FIXME: we need to decide on some locking/ordering semantics for the set_termios notification eventually */ mutex_lock(&tty->termios_mutex); - old_termios = *tty->termios; - *tty->termios = *new_termios; - unset_locked_termios(tty->termios, &old_termios, tty->termios_locked); + old_termios = tty->termios; + tty->termios = *new_termios; + unset_locked_termios(&tty->termios, &old_termios, &tty->termios_locked); /* See if packet mode change of state. */ if (tty->link && tty->link->packet) { int extproc = (old_termios.c_lflag & EXTPROC) | - (tty->termios->c_lflag & EXTPROC); + (tty->termios.c_lflag & EXTPROC); int old_flow = ((old_termios.c_iflag & IXON) && (old_termios.c_cc[VSTOP] == '\023') && (old_termios.c_cc[VSTART] == '\021')); @@ -542,7 +542,7 @@ int tty_set_termios(struct tty_struct *tty, struct ktermios *new_termios) if (tty->ops->set_termios) (*tty->ops->set_termios)(tty, &old_termios); else - tty_termios_copy_hw(tty->termios, &old_termios); + tty_termios_copy_hw(&tty->termios, &old_termios); ld = tty_ldisc_ref(tty); if (ld != NULL) { @@ -578,7 +578,7 @@ static int set_termios(struct tty_struct *tty, void __user *arg, int opt) return retval; mutex_lock(&tty->termios_mutex); - memcpy(&tmp_termios, tty->termios, sizeof(struct ktermios)); + tmp_termios = tty->termios; mutex_unlock(&tty->termios_mutex); if (opt & TERMIOS_TERMIO) { @@ -632,14 +632,14 @@ static int set_termios(struct tty_struct *tty, void __user *arg, int opt) static void copy_termios(struct tty_struct *tty, struct ktermios *kterm) { mutex_lock(&tty->termios_mutex); - memcpy(kterm, tty->termios, sizeof(struct ktermios)); + *kterm = tty->termios; mutex_unlock(&tty->termios_mutex); } static void copy_termios_locked(struct tty_struct *tty, struct ktermios *kterm) { mutex_lock(&tty->termios_mutex); - memcpy(kterm, tty->termios_locked, sizeof(struct ktermios)); + *kterm = tty->termios_locked; mutex_unlock(&tty->termios_mutex); } @@ -707,16 +707,16 @@ static int get_sgflags(struct tty_struct *tty) { int flags = 0; - if (!(tty->termios->c_lflag & ICANON)) { - if (tty->termios->c_lflag & ISIG) + if (!(tty->termios.c_lflag & ICANON)) { + if (tty->termios.c_lflag & ISIG) flags |= 0x02; /* cbreak */ else flags |= 0x20; /* raw */ } - if (tty->termios->c_lflag & ECHO) + if (tty->termios.c_lflag & ECHO) flags |= 0x08; /* echo */ - if (tty->termios->c_oflag & OPOST) - if (tty->termios->c_oflag & ONLCR) + if (tty->termios.c_oflag & OPOST) + if (tty->termios.c_oflag & ONLCR) flags |= 0x10; /* crmod */ return flags; } @@ -726,10 +726,10 @@ static int get_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb) struct sgttyb tmp; mutex_lock(&tty->termios_mutex); - tmp.sg_ispeed = tty->termios->c_ispeed; - tmp.sg_ospeed = tty->termios->c_ospeed; - tmp.sg_erase = tty->termios->c_cc[VERASE]; - tmp.sg_kill = tty->termios->c_cc[VKILL]; + tmp.sg_ispeed = tty->termios.c_ispeed; + tmp.sg_ospeed = tty->termios.c_ospeed; + tmp.sg_erase = tty->termios.c_cc[VERASE]; + tmp.sg_kill = tty->termios.c_cc[VKILL]; tmp.sg_flags = get_sgflags(tty); mutex_unlock(&tty->termios_mutex); @@ -738,27 +738,27 @@ static int get_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb) static void set_sgflags(struct ktermios *termios, int flags) { - termios->c_iflag = ICRNL | IXON; - termios->c_oflag = 0; - termios->c_lflag = ISIG | ICANON; + termios.c_iflag = ICRNL | IXON; + termios.c_oflag = 0; + termios.c_lflag = ISIG | ICANON; if (flags & 0x02) { /* cbreak */ - termios->c_iflag = 0; - termios->c_lflag &= ~ICANON; + termios.c_iflag = 0; + termios.c_lflag &= ~ICANON; } if (flags & 0x08) { /* echo */ - termios->c_lflag |= ECHO | ECHOE | ECHOK | + termios.c_lflag |= ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; } if (flags & 0x10) { /* crmod */ - termios->c_oflag |= OPOST | ONLCR; + termios.c_oflag |= OPOST | ONLCR; } if (flags & 0x20) { /* raw */ - termios->c_iflag = 0; - termios->c_lflag &= ~(ISIG | ICANON); + termios.c_iflag = 0; + termios.c_lflag &= ~(ISIG | ICANON); } - if (!(termios->c_lflag & ICANON)) { - termios->c_cc[VMIN] = 1; - termios->c_cc[VTIME] = 0; + if (!(termios.c_lflag & ICANON)) { + termios.c_cc[VMIN] = 1; + termios.c_cc[VTIME] = 0; } } @@ -787,7 +787,7 @@ static int set_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb) return -EFAULT; mutex_lock(&tty->termios_mutex); - termios = *tty->termios; + termios = tty->termios; termios.c_cc[VERASE] = tmp.sg_erase; termios.c_cc[VKILL] = tmp.sg_kill; set_sgflags(&termios, tmp.sg_flags); @@ -808,12 +808,12 @@ static int get_tchars(struct tty_struct *tty, struct tchars __user *tchars) struct tchars tmp; mutex_lock(&tty->termios_mutex); - tmp.t_intrc = tty->termios->c_cc[VINTR]; - tmp.t_quitc = tty->termios->c_cc[VQUIT]; - tmp.t_startc = tty->termios->c_cc[VSTART]; - tmp.t_stopc = tty->termios->c_cc[VSTOP]; - tmp.t_eofc = tty->termios->c_cc[VEOF]; - tmp.t_brkc = tty->termios->c_cc[VEOL2]; /* what is brkc anyway? */ + tmp.t_intrc = tty->termios.c_cc[VINTR]; + tmp.t_quitc = tty->termios.c_cc[VQUIT]; + tmp.t_startc = tty->termios.c_cc[VSTART]; + tmp.t_stopc = tty->termios.c_cc[VSTOP]; + tmp.t_eofc = tty->termios.c_cc[VEOF]; + tmp.t_brkc = tty->termios.c_cc[VEOL2]; /* what is brkc anyway? */ mutex_unlock(&tty->termios_mutex); return copy_to_user(tchars, &tmp, sizeof(tmp)) ? -EFAULT : 0; } @@ -825,12 +825,12 @@ static int set_tchars(struct tty_struct *tty, struct tchars __user *tchars) if (copy_from_user(&tmp, tchars, sizeof(tmp))) return -EFAULT; mutex_lock(&tty->termios_mutex); - tty->termios->c_cc[VINTR] = tmp.t_intrc; - tty->termios->c_cc[VQUIT] = tmp.t_quitc; - tty->termios->c_cc[VSTART] = tmp.t_startc; - tty->termios->c_cc[VSTOP] = tmp.t_stopc; - tty->termios->c_cc[VEOF] = tmp.t_eofc; - tty->termios->c_cc[VEOL2] = tmp.t_brkc; /* what is brkc anyway? */ + tty->termios.c_cc[VINTR] = tmp.t_intrc; + tty->termios.c_cc[VQUIT] = tmp.t_quitc; + tty->termios.c_cc[VSTART] = tmp.t_startc; + tty->termios.c_cc[VSTOP] = tmp.t_stopc; + tty->termios.c_cc[VEOF] = tmp.t_eofc; + tty->termios.c_cc[VEOL2] = tmp.t_brkc; /* what is brkc anyway? */ mutex_unlock(&tty->termios_mutex); return 0; } @@ -842,14 +842,14 @@ static int get_ltchars(struct tty_struct *tty, struct ltchars __user *ltchars) struct ltchars tmp; mutex_lock(&tty->termios_mutex); - tmp.t_suspc = tty->termios->c_cc[VSUSP]; + tmp.t_suspc = tty->termios.c_cc[VSUSP]; /* what is dsuspc anyway? */ - tmp.t_dsuspc = tty->termios->c_cc[VSUSP]; - tmp.t_rprntc = tty->termios->c_cc[VREPRINT]; + tmp.t_dsuspc = tty->termios.c_cc[VSUSP]; + tmp.t_rprntc = tty->termios.c_cc[VREPRINT]; /* what is flushc anyway? */ - tmp.t_flushc = tty->termios->c_cc[VEOL2]; - tmp.t_werasc = tty->termios->c_cc[VWERASE]; - tmp.t_lnextc = tty->termios->c_cc[VLNEXT]; + tmp.t_flushc = tty->termios.c_cc[VEOL2]; + tmp.t_werasc = tty->termios.c_cc[VWERASE]; + tmp.t_lnextc = tty->termios.c_cc[VLNEXT]; mutex_unlock(&tty->termios_mutex); return copy_to_user(ltchars, &tmp, sizeof(tmp)) ? -EFAULT : 0; } @@ -862,14 +862,14 @@ static int set_ltchars(struct tty_struct *tty, struct ltchars __user *ltchars) return -EFAULT; mutex_lock(&tty->termios_mutex); - tty->termios->c_cc[VSUSP] = tmp.t_suspc; + tty->termios.c_cc[VSUSP] = tmp.t_suspc; /* what is dsuspc anyway? */ - tty->termios->c_cc[VEOL2] = tmp.t_dsuspc; - tty->termios->c_cc[VREPRINT] = tmp.t_rprntc; + tty->termios.c_cc[VEOL2] = tmp.t_dsuspc; + tty->termios.c_cc[VREPRINT] = tmp.t_rprntc; /* what is flushc anyway? */ - tty->termios->c_cc[VEOL2] = tmp.t_flushc; - tty->termios->c_cc[VWERASE] = tmp.t_werasc; - tty->termios->c_cc[VLNEXT] = tmp.t_lnextc; + tty->termios.c_cc[VEOL2] = tmp.t_flushc; + tty->termios.c_cc[VWERASE] = tmp.t_werasc; + tty->termios.c_cc[VLNEXT] = tmp.t_lnextc; mutex_unlock(&tty->termios_mutex); return 0; } @@ -920,12 +920,12 @@ static int tty_change_softcar(struct tty_struct *tty, int arg) struct ktermios old; mutex_lock(&tty->termios_mutex); - old = *tty->termios; - tty->termios->c_cflag &= ~CLOCAL; - tty->termios->c_cflag |= bit; + old = tty->termios; + tty->termios.c_cflag &= ~CLOCAL; + tty->termios.c_cflag |= bit; if (tty->ops->set_termios) tty->ops->set_termios(tty, &old); - if ((tty->termios->c_cflag & CLOCAL) != bit) + if ((tty->termios.c_cflag & CLOCAL) != bit) ret = -EINVAL; mutex_unlock(&tty->termios_mutex); return ret; @@ -1031,7 +1031,7 @@ int tty_mode_ioctl(struct tty_struct *tty, struct file *file, (struct termios __user *) arg)) return -EFAULT; mutex_lock(&real_tty->termios_mutex); - memcpy(real_tty->termios_locked, &kterm, sizeof(struct ktermios)); + real_tty->termios_locked = kterm; mutex_unlock(&real_tty->termios_mutex); return 0; #else @@ -1048,7 +1048,7 @@ int tty_mode_ioctl(struct tty_struct *tty, struct file *file, (struct termios __user *) arg)) return -EFAULT; mutex_lock(&real_tty->termios_mutex); - memcpy(real_tty->termios_locked, &kterm, sizeof(struct ktermios)); + real_tty->termios_locked = kterm; mutex_unlock(&real_tty->termios_mutex); return ret; #endif diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 6f99c9959f0..e6156c60d19 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -413,7 +413,7 @@ EXPORT_SYMBOL_GPL(tty_ldisc_flush); static void tty_set_termios_ldisc(struct tty_struct *tty, int num) { mutex_lock(&tty->termios_mutex); - tty->termios->c_line = num; + tty->termios.c_line = num; mutex_unlock(&tty->termios_mutex); } @@ -722,9 +722,9 @@ enable: static void tty_reset_termios(struct tty_struct *tty) { mutex_lock(&tty->termios_mutex); - *tty->termios = tty->driver->init_termios; - tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios); - tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios); + tty->termios = tty->driver->init_termios; + tty->termios.c_ispeed = tty_termios_input_baud_rate(&tty->termios); + tty->termios.c_ospeed = tty_termios_baud_rate(&tty->termios); mutex_unlock(&tty->termios_mutex); } @@ -846,7 +846,7 @@ retry: if (reset == 0) { - if (!tty_ldisc_reinit(tty, tty->termios->c_line)) + if (!tty_ldisc_reinit(tty, tty->termios.c_line)) err = tty_ldisc_open(tty, tty->ldisc); else err = 1; diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 4e9d2b291f4..edcb827c128 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -255,7 +255,7 @@ int tty_port_block_til_ready(struct tty_port *port, } if (filp->f_flags & O_NONBLOCK) { /* Indicate we are open */ - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) tty_port_raise_dtr_rts(port); port->flags |= ASYNC_NORMAL_ACTIVE; return 0; @@ -279,7 +279,7 @@ int tty_port_block_til_ready(struct tty_port *port, while (1) { /* Indicate we are open */ - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) tty_port_raise_dtr_rts(port); prepare_to_wait(&port->open_wait, &wait, TASK_INTERRUPTIBLE); @@ -378,7 +378,7 @@ int tty_port_close_start(struct tty_port *port, /* Drop DTR/RTS if HUPCL is set. This causes any attached modem to hang up the line */ - if (tty->termios->c_cflag & HUPCL) + if (tty->termios.c_cflag & HUPCL) tty_port_lower_dtr_rts(port); /* Don't call port->drop for the last reference. Callers will want diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 7cb53c23633..dbceaeb2c3e 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2823,9 +2823,9 @@ static int con_install(struct tty_driver *driver, struct tty_struct *tty) tty->winsize.ws_col = vc_cons[currcons].d->vc_cols; } if (vc->vc_utf) - tty->termios->c_iflag |= IUTF8; + tty->termios.c_iflag |= IUTF8; else - tty->termios->c_iflag &= ~IUTF8; + tty->termios.c_iflag &= ~IUTF8; unlock: console_unlock(); return ret; diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 36a2a0b7b82..bb2e37f7db2 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -826,7 +826,7 @@ static void acm_tty_set_termios(struct tty_struct *tty, struct ktermios *termios_old) { struct acm *acm = tty->driver_data; - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; struct usb_cdc_line_coding newline; int newctrl = acm->ctrlout; diff --git a/drivers/usb/serial/ark3116.c b/drivers/usb/serial/ark3116.c index f8ce97d8b0a..3b98fb73336 100644 --- a/drivers/usb/serial/ark3116.c +++ b/drivers/usb/serial/ark3116.c @@ -215,7 +215,7 @@ static void ark3116_release(struct usb_serial *serial) static void ark3116_init_termios(struct tty_struct *tty) { - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; *termios = tty_std_termios; termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; @@ -229,7 +229,7 @@ static void ark3116_set_termios(struct tty_struct *tty, { struct usb_serial *serial = port->serial; struct ark3116_private *priv = usb_get_serial_port_data(port); - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; int bps = tty_get_baud_rate(tty); int quot; diff --git a/drivers/usb/serial/belkin_sa.c b/drivers/usb/serial/belkin_sa.c index 6b736563295..a46df73ee96 100644 --- a/drivers/usb/serial/belkin_sa.c +++ b/drivers/usb/serial/belkin_sa.c @@ -307,7 +307,7 @@ static void belkin_sa_set_termios(struct tty_struct *tty, unsigned long control_state; int bad_flow_control; speed_t baud; - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; iflag = termios->c_iflag; cflag = termios->c_cflag; diff --git a/drivers/usb/serial/cp210x.c b/drivers/usb/serial/cp210x.c index 1e71079ce33..ba5e07e188a 100644 --- a/drivers/usb/serial/cp210x.c +++ b/drivers/usb/serial/cp210x.c @@ -469,7 +469,7 @@ static void cp210x_get_termios(struct tty_struct *tty, if (tty) { cp210x_get_termios_port(tty->driver_data, - &tty->termios->c_cflag, &baud); + &tty->termios.c_cflag, &baud); tty_encode_baud_rate(tty, baud, baud); } @@ -631,7 +631,7 @@ static void cp210x_change_speed(struct tty_struct *tty, { u32 baud; - baud = tty->termios->c_ospeed; + baud = tty->termios.c_ospeed; /* This maps the requested rate to a rate valid on cp2102 or cp2103, * or to an arbitrary rate in [1M,2M]. @@ -665,10 +665,10 @@ static void cp210x_set_termios(struct tty_struct *tty, if (!tty) return; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; old_cflag = old_termios->c_cflag; - if (tty->termios->c_ospeed != old_termios->c_ospeed) + if (tty->termios.c_ospeed != old_termios->c_ospeed) cp210x_change_speed(tty, port, old_termios); /* If the number of data bits is to be updated */ diff --git a/drivers/usb/serial/cypress_m8.c b/drivers/usb/serial/cypress_m8.c index b78c34eb5d3..be34f153e56 100644 --- a/drivers/usb/serial/cypress_m8.c +++ b/drivers/usb/serial/cypress_m8.c @@ -922,38 +922,38 @@ static void cypress_set_termios(struct tty_struct *tty, early enough */ if (!priv->termios_initialized) { if (priv->chiptype == CT_EARTHMATE) { - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = B4800 | CS8 | CREAD | HUPCL | + tty->termios = tty_std_termios; + tty->termios.c_cflag = B4800 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios->c_ispeed = 4800; - tty->termios->c_ospeed = 4800; + tty->termios.c_ispeed = 4800; + tty->termios.c_ospeed = 4800; } else if (priv->chiptype == CT_CYPHIDCOM) { - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | + tty->termios = tty_std_termios; + tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios->c_ispeed = 9600; - tty->termios->c_ospeed = 9600; + tty->termios.c_ispeed = 9600; + tty->termios.c_ospeed = 9600; } else if (priv->chiptype == CT_CA42V2) { - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = B9600 | CS8 | CREAD | HUPCL | + tty->termios = tty_std_termios; + tty->termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios->c_ispeed = 9600; - tty->termios->c_ospeed = 9600; + tty->termios.c_ispeed = 9600; + tty->termios.c_ospeed = 9600; } priv->termios_initialized = 1; } spin_unlock_irqrestore(&priv->lock, flags); /* Unsupported features need clearing */ - tty->termios->c_cflag &= ~(CMSPAR|CRTSCTS); + tty->termios.c_cflag &= ~(CMSPAR|CRTSCTS); - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; /* check if there are new settings */ if (old_termios) { spin_lock_irqsave(&priv->lock, flags); - priv->tmp_termios = *(tty->termios); + priv->tmp_termios = tty->termios; spin_unlock_irqrestore(&priv->lock, flags); } @@ -1021,7 +1021,7 @@ static void cypress_set_termios(struct tty_struct *tty, "4800bps."); /* define custom termios settings for NMEA protocol */ - tty->termios->c_iflag /* input modes - */ + tty->termios.c_iflag /* input modes - */ &= ~(IGNBRK /* disable ignore break */ | BRKINT /* disable break causes interrupt */ | PARMRK /* disable mark parity errors */ @@ -1031,10 +1031,10 @@ static void cypress_set_termios(struct tty_struct *tty, | ICRNL /* disable translate CR to NL */ | IXON); /* disable enable XON/XOFF flow control */ - tty->termios->c_oflag /* output modes */ + tty->termios.c_oflag /* output modes */ &= ~OPOST; /* disable postprocess output char */ - tty->termios->c_lflag /* line discipline modes */ + tty->termios.c_lflag /* line discipline modes */ &= ~(ECHO /* disable echo input characters */ | ECHONL /* disable echo new line */ | ICANON /* disable erase, kill, werase, and rprnt @@ -1200,7 +1200,7 @@ static void cypress_read_int_callback(struct urb *urb) /* hangup, as defined in acm.c... this might be a bad place for it * though */ - if (tty && !(tty->termios->c_cflag & CLOCAL) && + if (tty && !(tty->termios.c_cflag & CLOCAL) && !(priv->current_status & UART_CD)) { dbg("%s - calling hangup", __func__); tty_hangup(tty); diff --git a/drivers/usb/serial/digi_acceleport.c b/drivers/usb/serial/digi_acceleport.c index b5cd838093e..afd9d2ec577 100644 --- a/drivers/usb/serial/digi_acceleport.c +++ b/drivers/usb/serial/digi_acceleport.c @@ -687,8 +687,8 @@ static void digi_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { struct digi_port *priv = usb_get_serial_port_data(port); - unsigned int iflag = tty->termios->c_iflag; - unsigned int cflag = tty->termios->c_cflag; + unsigned int iflag = tty->termios.c_iflag; + unsigned int cflag = tty->termios.c_cflag; unsigned int old_iflag = old_termios->c_iflag; unsigned int old_cflag = old_termios->c_cflag; unsigned char buf[32]; @@ -709,7 +709,7 @@ static void digi_set_termios(struct tty_struct *tty, /* don't set RTS if using hardware flow control */ /* and throttling input */ modem_signals = TIOCM_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) modem_signals |= TIOCM_RTS; digi_set_modem_signals(port, modem_signals, 1); @@ -748,7 +748,7 @@ static void digi_set_termios(struct tty_struct *tty, } } /* set parity */ - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; if ((cflag&(PARENB|PARODD)) != (old_cflag&(PARENB|PARODD))) { if (cflag&PARENB) { @@ -1124,8 +1124,8 @@ static int digi_open(struct tty_struct *tty, struct usb_serial_port *port) /* set termios settings */ if (tty) { - not_termios.c_cflag = ~tty->termios->c_cflag; - not_termios.c_iflag = ~tty->termios->c_iflag; + not_termios.c_cflag = ~tty->termios.c_cflag; + not_termios.c_iflag = ~tty->termios.c_iflag; digi_set_termios(tty, port, ¬_termios); } return 0; @@ -1500,7 +1500,7 @@ static int digi_read_oob_callback(struct urb *urb) rts = 0; if (tty) - rts = tty->termios->c_cflag & CRTSCTS; + rts = tty->termios.c_cflag & CRTSCTS; if (tty && opcode == DIGI_CMD_READ_INPUT_SIGNALS) { spin_lock(&priv->dp_port_lock); diff --git a/drivers/usb/serial/empeg.c b/drivers/usb/serial/empeg.c index cdf61dd0731..34e86383090 100644 --- a/drivers/usb/serial/empeg.c +++ b/drivers/usb/serial/empeg.c @@ -87,7 +87,7 @@ static int empeg_startup(struct usb_serial *serial) static void empeg_init_termios(struct tty_struct *tty) { - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; /* * The empeg-car player wants these particular tty settings. diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 499b15fd82f..42c604bc7ce 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -173,7 +173,7 @@ static void f81232_set_termios(struct tty_struct *tty, /* FIXME - Stubbed out for now */ /* Don't change anything if nothing has changed */ - if (!tty_termios_hw_change(tty->termios, old_termios)) + if (!tty_termios_hw_change(&tty->termios, old_termios)) return; /* Do the real work here... */ diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index bc912e5a3be..4b8b41a3351 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -2081,7 +2081,7 @@ static void ftdi_set_termios(struct tty_struct *tty, { struct usb_device *dev = port->serial->dev; struct ftdi_private *priv = usb_get_serial_port_data(port); - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; __u16 urb_value; /* will hold the new flags */ diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index e1f5ccd1e8f..f435575c4e6 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -1458,7 +1458,7 @@ static void edge_throttle(struct tty_struct *tty) } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { edge_port->shadowMCR &= ~MCR_RTS; status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); @@ -1497,7 +1497,7 @@ static void edge_unthrottle(struct tty_struct *tty) return; } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { edge_port->shadowMCR |= MCR_RTS; send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR); @@ -1516,9 +1516,9 @@ static void edge_set_termios(struct tty_struct *tty, struct edgeport_port *edge_port = usb_get_serial_port_data(port); unsigned int cflag; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; dbg("%s - clfag %08x iflag %08x", __func__, - tty->termios->c_cflag, tty->termios->c_iflag); + tty->termios.c_cflag, tty->termios.c_iflag); dbg("%s - old clfag %08x old iflag %08x", __func__, old_termios->c_cflag, old_termios->c_iflag); @@ -1987,7 +1987,7 @@ static void process_rcvd_status(struct edgeport_serial *edge_serial, tty = tty_port_tty_get(&edge_port->port->port); if (tty) { change_port_settings(tty, - edge_port, tty->termios); + edge_port, &tty->termios); tty_kref_put(tty); } @@ -2570,7 +2570,7 @@ static void change_port_settings(struct tty_struct *tty, return; } - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; switch (cflag & CSIZE) { case CS5: diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index 3936904c641..765978ae752 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -1870,7 +1870,7 @@ static int edge_open(struct tty_struct *tty, struct usb_serial_port *port) /* set up the port settings */ if (tty) - edge_set_termios(tty, port, tty->termios); + edge_set_termios(tty, port, &tty->termios); /* open up the port */ @@ -2272,13 +2272,13 @@ static void change_port_settings(struct tty_struct *tty, config = kmalloc (sizeof (*config), GFP_KERNEL); if (!config) { - *tty->termios = *old_termios; + tty->termios = *old_termios; dev_err(&edge_port->port->dev, "%s - out of memory\n", __func__); return; } - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; config->wFlags = 0; @@ -2362,7 +2362,7 @@ static void change_port_settings(struct tty_struct *tty, } else dbg("%s - OUTBOUND XON/XOFF is disabled", __func__); - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; /* Round the baud rate */ baud = tty_get_baud_rate(tty); @@ -2408,10 +2408,10 @@ static void edge_set_termios(struct tty_struct *tty, struct edgeport_port *edge_port = usb_get_serial_port_data(port); unsigned int cflag; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; dbg("%s - clfag %08x iflag %08x", __func__, - tty->termios->c_cflag, tty->termios->c_iflag); + tty->termios.c_cflag, tty->termios.c_iflag); dbg("%s - old clfag %08x old iflag %08x", __func__, old_termios->c_cflag, old_termios->c_iflag); dbg("%s - port %d", __func__, port->number); diff --git a/drivers/usb/serial/ir-usb.c b/drivers/usb/serial/ir-usb.c index fc09414c960..5a96692b12a 100644 --- a/drivers/usb/serial/ir-usb.c +++ b/drivers/usb/serial/ir-usb.c @@ -381,7 +381,7 @@ static void ir_set_termios(struct tty_struct *tty, ir_xbof = ir_xbof_change(xbof) ; /* Only speed changes are supported */ - tty_termios_copy_hw(tty->termios, old_termios); + tty_termios_copy_hw(&tty->termios, old_termios); tty_encode_baud_rate(tty, baud, baud); /* diff --git a/drivers/usb/serial/iuu_phoenix.c b/drivers/usb/serial/iuu_phoenix.c index 22b1eb5040b..bf3864045c1 100644 --- a/drivers/usb/serial/iuu_phoenix.c +++ b/drivers/usb/serial/iuu_phoenix.c @@ -921,7 +921,7 @@ static void iuu_set_termios(struct tty_struct *tty, { const u32 supported_mask = CMSPAR|PARENB|PARODD; struct iuu_private *priv = usb_get_serial_port_data(port); - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; int status; u32 actual; u32 parity; @@ -930,7 +930,7 @@ static void iuu_set_termios(struct tty_struct *tty, u32 newval = cflag & supported_mask; /* Just use the ospeed. ispeed should be the same. */ - baud = tty->termios->c_ospeed; + baud = tty->termios.c_ospeed; dbg("%s - enter c_ospeed or baud=%d", __func__, baud); @@ -961,13 +961,13 @@ static void iuu_set_termios(struct tty_struct *tty, * settings back over and then adjust them */ if (old_termios) - tty_termios_copy_hw(tty->termios, old_termios); + tty_termios_copy_hw(&tty->termios, old_termios); if (status != 0) /* Set failed - return old bits */ return; /* Re-encode speed, parity and csize */ tty_encode_baud_rate(tty, baud, baud); - tty->termios->c_cflag &= ~(supported_mask|CSIZE); - tty->termios->c_cflag |= newval | csize; + tty->termios.c_cflag &= ~(supported_mask|CSIZE); + tty->termios.c_cflag |= newval | csize; } static void iuu_close(struct usb_serial_port *port) @@ -993,14 +993,14 @@ static void iuu_close(struct usb_serial_port *port) static void iuu_init_termios(struct tty_struct *tty) { - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = CLOCAL | CREAD | CS8 | B9600 + tty->termios = tty_std_termios; + tty->termios.c_cflag = CLOCAL | CREAD | CS8 | B9600 | TIOCM_CTS | CSTOPB | PARENB; - tty->termios->c_ispeed = 9600; - tty->termios->c_ospeed = 9600; - tty->termios->c_lflag = 0; - tty->termios->c_oflag = 0; - tty->termios->c_iflag = 0; + tty->termios.c_ispeed = 9600; + tty->termios.c_ospeed = 9600; + tty->termios.c_lflag = 0; + tty->termios.c_oflag = 0; + tty->termios.c_iflag = 0; } static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port) @@ -1012,8 +1012,8 @@ static int iuu_open(struct tty_struct *tty, struct usb_serial_port *port) u32 actual; struct iuu_private *priv = usb_get_serial_port_data(port); - baud = tty->termios->c_ospeed; - tty->termios->c_ispeed = baud; + baud = tty->termios.c_ospeed; + tty->termios.c_ispeed = baud; /* Re-encode speed */ tty_encode_baud_rate(tty, baud, baud); diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c index a1b99243dac..6225199119c 100644 --- a/drivers/usb/serial/keyspan.c +++ b/drivers/usb/serial/keyspan.c @@ -158,7 +158,7 @@ static void keyspan_set_termios(struct tty_struct *tty, p_priv = usb_get_serial_port_data(port); d_details = p_priv->device_details; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; device_port = port->number - port->serial->minor; /* Baud rate calculation takes baud rate as an integer @@ -179,7 +179,7 @@ static void keyspan_set_termios(struct tty_struct *tty, p_priv->flow_control = (cflag & CRTSCTS)? flow_cts: flow_none; /* Mark/Space not supported */ - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; keyspan_send_setup(port, 0); } @@ -1089,7 +1089,7 @@ static int keyspan_open(struct tty_struct *tty, struct usb_serial_port *port) device_port = port->number - port->serial->minor; if (tty) { - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* Baud rate calculation takes baud rate as an integer so other rates can be generated if desired. */ baud_rate = tty_get_baud_rate(tty); diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c index a4ac3cfeffc..dcada8615fc 100644 --- a/drivers/usb/serial/keyspan_pda.c +++ b/drivers/usb/serial/keyspan_pda.c @@ -338,7 +338,7 @@ static void keyspan_pda_set_termios(struct tty_struct *tty, 7[EOMS]1: 10 bit, b0/b7 is parity 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?) - HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS + HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS bit. For now, just do baud. */ @@ -353,7 +353,7 @@ static void keyspan_pda_set_termios(struct tty_struct *tty, } /* Only speed can change so copy the old h/w parameters then encode the new speed */ - tty_termios_copy_hw(tty->termios, old_termios); + tty_termios_copy_hw(&tty->termios, old_termios); tty_encode_baud_rate(tty, speed, speed); } diff --git a/drivers/usb/serial/kl5kusb105.c b/drivers/usb/serial/kl5kusb105.c index 5bed59cd577..def9ad25871 100644 --- a/drivers/usb/serial/kl5kusb105.c +++ b/drivers/usb/serial/kl5kusb105.c @@ -311,12 +311,12 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) /* set up termios structure */ spin_lock_irqsave(&priv->lock, flags); - priv->termios.c_iflag = tty->termios->c_iflag; - priv->termios.c_oflag = tty->termios->c_oflag; - priv->termios.c_cflag = tty->termios->c_cflag; - priv->termios.c_lflag = tty->termios->c_lflag; + priv->termios.c_iflag = tty->termios.c_iflag; + priv->termios.c_oflag = tty->termios.c_oflag; + priv->termios.c_cflag = tty->termios.c_cflag; + priv->termios.c_lflag = tty->termios.c_lflag; for (i = 0; i < NCCS; i++) - priv->termios.c_cc[i] = tty->termios->c_cc[i]; + priv->termios.c_cc[i] = tty->termios.c_cc[i]; priv->cfg.pktlen = cfg->pktlen; priv->cfg.baudrate = cfg->baudrate; priv->cfg.databits = cfg->databits; @@ -445,9 +445,9 @@ static void klsi_105_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct klsi_105_private *priv = usb_get_serial_port_data(port); - unsigned int iflag = tty->termios->c_iflag; + unsigned int iflag = tty->termios.c_iflag; unsigned int old_iflag = old_termios->c_iflag; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; unsigned int old_cflag = old_termios->c_cflag; struct klsi_105_port_settings *cfg; unsigned long flags; @@ -560,7 +560,7 @@ static void klsi_105_set_termios(struct tty_struct *tty, if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) || (cflag & CSTOPB) != (old_cflag & CSTOPB)) { /* Not currently supported */ - tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB); + tty->termios.c_cflag &= ~(PARENB|PARODD|CSTOPB); #if 0 priv->last_lcr = 0; @@ -587,7 +587,7 @@ static void klsi_105_set_termios(struct tty_struct *tty, || (iflag & IXON) != (old_iflag & IXON) || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { /* Not currently supported */ - tty->termios->c_cflag &= ~CRTSCTS; + tty->termios.c_cflag &= ~CRTSCTS; /* Drop DTR/RTS if no flow control otherwise assert */ #if 0 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c index fafeabb64c5..0516a9661e2 100644 --- a/drivers/usb/serial/kobil_sct.c +++ b/drivers/usb/serial/kobil_sct.c @@ -191,11 +191,11 @@ static void kobil_release(struct usb_serial *serial) static void kobil_init_termios(struct tty_struct *tty) { /* Default to echo off and other sane device settings */ - tty->termios->c_lflag = 0; - tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE); - tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF; + tty->termios.c_lflag = 0; + tty->termios.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE); + tty->termios.c_lflag = IGNBRK | IGNPAR | IXOFF; /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */ - tty->termios->c_oflag &= ~ONLCR; + tty->termios.c_oflag &= ~ONLCR; } static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port) @@ -581,14 +581,14 @@ static void kobil_set_termios(struct tty_struct *tty, struct kobil_private *priv; int result; unsigned short urb_val = 0; - int c_cflag = tty->termios->c_cflag; + int c_cflag = tty->termios.c_cflag; speed_t speed; priv = usb_get_serial_port_data(port); if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { /* This device doesn't support ioctl calls */ - *tty->termios = *old; + tty->termios = *old; return; } @@ -612,7 +612,7 @@ static void kobil_set_termios(struct tty_struct *tty, urb_val |= SUSBCR_SPASB_EvenParity; } else urb_val |= SUSBCR_SPASB_NoParity; - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; tty_encode_baud_rate(tty, speed, speed); result = usb_control_msg(port->serial->dev, diff --git a/drivers/usb/serial/mct_u232.c b/drivers/usb/serial/mct_u232.c index a71fa0aa040..df98cffdba6 100644 --- a/drivers/usb/serial/mct_u232.c +++ b/drivers/usb/serial/mct_u232.c @@ -454,7 +454,7 @@ static int mct_u232_open(struct tty_struct *tty, struct usb_serial_port *port) * either. */ spin_lock_irqsave(&priv->lock, flags); - if (tty && (tty->termios->c_cflag & CBAUD)) + if (tty && (tty->termios.c_cflag & CBAUD)) priv->control_state = TIOCM_DTR | TIOCM_RTS; else priv->control_state = 0; @@ -634,7 +634,7 @@ static void mct_u232_set_termios(struct tty_struct *tty, { struct usb_serial *serial = port->serial; struct mct_u232_private *priv = usb_get_serial_port_data(port); - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; unsigned int cflag = termios->c_cflag; unsigned int old_cflag = old_termios->c_cflag; unsigned long flags; diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index a07dd3c8cfe..012f67b2e4c 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -1349,7 +1349,7 @@ static void mos7720_throttle(struct tty_struct *tty) } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { mos7720_port->shadowMCR &= ~UART_MCR_RTS; write_mos_reg(port->serial, port->number - port->serial->minor, MCR, mos7720_port->shadowMCR); @@ -1383,7 +1383,7 @@ static void mos7720_unthrottle(struct tty_struct *tty) } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { mos7720_port->shadowMCR |= UART_MCR_RTS; write_mos_reg(port->serial, port->number - port->serial->minor, MCR, mos7720_port->shadowMCR); @@ -1604,8 +1604,8 @@ static void change_port_settings(struct tty_struct *tty, lStop = 0x00; /* 1 stop bit */ lParity = 0x00; /* No parity */ - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; /* Change the number of bits */ switch (cflag & CSIZE) { @@ -1753,11 +1753,11 @@ static void mos7720_set_termios(struct tty_struct *tty, dbg("%s\n", "setting termios - ASPIRE"); - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; dbg("%s - cflag %08x iflag %08x", __func__, - tty->termios->c_cflag, - RELEVANT_IFLAG(tty->termios->c_iflag)); + tty->termios.c_cflag, + RELEVANT_IFLAG(tty->termios.c_iflag)); dbg("%s - old cflag %08x old iflag %08x", __func__, old_termios->c_cflag, diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index 57eca244842..d2f2b5d6573 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -1649,7 +1649,7 @@ static void mos7840_throttle(struct tty_struct *tty) return; } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { mos7840_port->shadowMCR &= ~MCR_RTS; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mos7840_port->shadowMCR); @@ -1692,7 +1692,7 @@ static void mos7840_unthrottle(struct tty_struct *tty) } /* if we are implementing RTS/CTS, toggle that line */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { mos7840_port->shadowMCR |= MCR_RTS; status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mos7840_port->shadowMCR); @@ -1998,8 +1998,8 @@ static void mos7840_change_port_settings(struct tty_struct *tty, lStop = LCR_STOP_1; lParity = LCR_PAR_NONE; - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; /* Change the number of bits */ if (cflag & CSIZE) { @@ -2159,10 +2159,10 @@ static void mos7840_set_termios(struct tty_struct *tty, dbg("%s", "setting termios - "); - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; dbg("%s - clfag %08x iflag %08x", __func__, - tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag)); + tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag)); dbg("%s - old clfag %08x old iflag %08x", __func__, old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag)); dbg("%s - port %d", __func__, port->number); diff --git a/drivers/usb/serial/oti6858.c b/drivers/usb/serial/oti6858.c index 5976b65ab6e..9f555560bfb 100644 --- a/drivers/usb/serial/oti6858.c +++ b/drivers/usb/serial/oti6858.c @@ -404,10 +404,10 @@ static int oti6858_chars_in_buffer(struct tty_struct *tty) static void oti6858_init_termios(struct tty_struct *tty) { - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios->c_ispeed = 38400; - tty->termios->c_ospeed = 38400; + tty->termios = tty_std_termios; + tty->termios.c_cflag = B38400 | CS8 | CREAD | HUPCL | CLOCAL; + tty->termios.c_ispeed = 38400; + tty->termios.c_ospeed = 38400; } static void oti6858_set_termios(struct tty_struct *tty, @@ -425,7 +425,7 @@ static void oti6858_set_termios(struct tty_struct *tty, return; } - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; spin_lock_irqsave(&priv->lock, flags); divisor = priv->pending_setup.divisor; diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c index 13b8dd6481f..2b9108a8ea6 100644 --- a/drivers/usb/serial/pl2303.c +++ b/drivers/usb/serial/pl2303.c @@ -260,16 +260,16 @@ static void pl2303_set_termios(struct tty_struct *tty, serial settings even to the same values as before. Thus we actually need to filter in this specific case */ - if (!tty_termios_hw_change(tty->termios, old_termios)) + if (!tty_termios_hw_change(&tty->termios, old_termios)) return; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; buf = kzalloc(7, GFP_KERNEL); if (!buf) { dev_err(&port->dev, "%s - out of memory.\n", __func__); /* Report back no change occurred */ - *tty->termios = *old_termios; + tty->termios = *old_termios; return; } diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c index 8dd88ebe986..7de6d491a85 100644 --- a/drivers/usb/serial/quatech2.c +++ b/drivers/usb/serial/quatech2.c @@ -275,7 +275,7 @@ static void qt2_set_termios(struct tty_struct *tty, { struct usb_device *dev = port->serial->dev; struct qt2_port_private *port_priv; - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; u16 baud; unsigned int cflag = termios->c_cflag; u16 new_lcr = 0; @@ -408,7 +408,7 @@ static int qt2_open(struct tty_struct *tty, struct usb_serial_port *port) port_priv->device_port = (u8) device_port; if (tty) - qt2_set_termios(tty, port, tty->termios); + qt2_set_termios(tty, port, &tty->termios); return 0; diff --git a/drivers/usb/serial/sierra.c b/drivers/usb/serial/sierra.c index d423d36acc0..a4e4f3a16c6 100644 --- a/drivers/usb/serial/sierra.c +++ b/drivers/usb/serial/sierra.c @@ -385,7 +385,7 @@ static int sierra_send_setup(struct usb_serial_port *port) static void sierra_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { - tty_termios_copy_hw(tty->termios, old_termios); + tty_termios_copy_hw(&tty->termios, old_termios); sierra_send_setup(port); } diff --git a/drivers/usb/serial/spcp8x5.c b/drivers/usb/serial/spcp8x5.c index cad60898471..ab68a4d74d6 100644 --- a/drivers/usb/serial/spcp8x5.c +++ b/drivers/usb/serial/spcp8x5.c @@ -316,10 +316,10 @@ static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on) static void spcp8x5_init_termios(struct tty_struct *tty) { /* for the 1st time call this function */ - *(tty->termios) = tty_std_termios; - tty->termios->c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL; - tty->termios->c_ispeed = 115200; - tty->termios->c_ospeed = 115200; + tty->termios = tty_std_termios; + tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL; + tty->termios.c_ispeed = 115200; + tty->termios.c_ospeed = 115200; } /* set the serial param for transfer. we should check if we really need to @@ -330,7 +330,7 @@ static void spcp8x5_set_termios(struct tty_struct *tty, struct usb_serial *serial = port->serial; struct spcp8x5_private *priv = usb_get_serial_port_data(port); unsigned long flags; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; unsigned int old_cflag = old_termios->c_cflag; unsigned short uartdata; unsigned char buf[2] = {0, 0}; @@ -340,7 +340,7 @@ static void spcp8x5_set_termios(struct tty_struct *tty, /* check that they really want us to change something */ - if (!tty_termios_hw_change(tty->termios, old_termios)) + if (!tty_termios_hw_change(&tty->termios, old_termios)) return; /* set DTR/RTS active */ diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c index 3fee23bf0c1..cf2d30cf758 100644 --- a/drivers/usb/serial/ssu100.c +++ b/drivers/usb/serial/ssu100.c @@ -216,7 +216,7 @@ static void ssu100_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct usb_device *dev = port->serial->dev; - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; u16 baud, divisor, remainder; unsigned int cflag = termios->c_cflag; u16 urb_value = 0; /* will hold the new flags */ @@ -322,7 +322,7 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port) dbg("%s - set uart failed", __func__); if (tty) - ssu100_set_termios(tty, port, tty->termios); + ssu100_set_termios(tty, port, &tty->termios); return usb_serial_generic_open(tty, port); } diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c index a4404f5ad68..f502a16aac2 100644 --- a/drivers/usb/serial/ti_usb_3410_5052.c +++ b/drivers/usb/serial/ti_usb_3410_5052.c @@ -520,7 +520,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) } if (tty) - ti_set_termios(tty, port, tty->termios); + ti_set_termios(tty, port, &tty->termios); dbg("%s - sending TI_OPEN_PORT", __func__); status = ti_command_out_sync(tdev, TI_OPEN_PORT, @@ -562,7 +562,7 @@ static int ti_open(struct tty_struct *tty, struct usb_serial_port *port) usb_clear_halt(dev, port->read_urb->pipe); if (tty) - ti_set_termios(tty, port, tty->termios); + ti_set_termios(tty, port, &tty->termios); dbg("%s - sending TI_OPEN_PORT (2)", __func__); status = ti_command_out_sync(tdev, TI_OPEN_PORT, @@ -831,8 +831,8 @@ static void ti_set_termios(struct tty_struct *tty, int port_number = port->number - port->serial->minor; unsigned int mcr; - cflag = tty->termios->c_cflag; - iflag = tty->termios->c_iflag; + cflag = tty->termios.c_cflag; + iflag = tty->termios.c_iflag; dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag); dbg("%s - old clfag %08x, old iflag %08x", __func__, @@ -871,7 +871,7 @@ static void ti_set_termios(struct tty_struct *tty, } /* CMSPAR isn't supported by this driver */ - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; if (cflag & PARENB) { if (cflag & PARODD) { diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index da67abb1945..5fe21357b55 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -423,7 +423,7 @@ static void serial_set_termios(struct tty_struct *tty, struct ktermios *old) if (port->serial->type->set_termios) port->serial->type->set_termios(tty, port, old); else - tty_termios_copy_hw(tty->termios, old); + tty_termios_copy_hw(&tty->termios, old); } static int serial_break(struct tty_struct *tty, int break_state) diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index f35971dff4a..7c3db9e6f32 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -67,7 +67,7 @@ void usb_wwan_set_termios(struct tty_struct *tty, struct usb_wwan_intf_private *intfdata = port->serial->private; /* Doesn't support option setting */ - tty_termios_copy_hw(tty->termios, old_termios); + tty_termios_copy_hw(&tty->termios, old_termios); if (intfdata->send_setup) intfdata->send_setup(port); diff --git a/drivers/usb/serial/whiteheat.c b/drivers/usb/serial/whiteheat.c index 473635e7f5d..b36077de72b 100644 --- a/drivers/usb/serial/whiteheat.c +++ b/drivers/usb/serial/whiteheat.c @@ -724,7 +724,7 @@ static void firm_setup_port(struct tty_struct *tty) { struct usb_serial_port *port = tty->driver_data; struct whiteheat_port_settings port_settings; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; port_settings.port = port->number + 1; diff --git a/include/linux/tty.h b/include/linux/tty.h index 40b18d7ad92..d5e75ee0f4d 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -103,28 +103,28 @@ struct tty_bufhead { #define TTY_PARITY 3 #define TTY_OVERRUN 4 -#define INTR_CHAR(tty) ((tty)->termios->c_cc[VINTR]) -#define QUIT_CHAR(tty) ((tty)->termios->c_cc[VQUIT]) -#define ERASE_CHAR(tty) ((tty)->termios->c_cc[VERASE]) -#define KILL_CHAR(tty) ((tty)->termios->c_cc[VKILL]) -#define EOF_CHAR(tty) ((tty)->termios->c_cc[VEOF]) -#define TIME_CHAR(tty) ((tty)->termios->c_cc[VTIME]) -#define MIN_CHAR(tty) ((tty)->termios->c_cc[VMIN]) -#define SWTC_CHAR(tty) ((tty)->termios->c_cc[VSWTC]) -#define START_CHAR(tty) ((tty)->termios->c_cc[VSTART]) -#define STOP_CHAR(tty) ((tty)->termios->c_cc[VSTOP]) -#define SUSP_CHAR(tty) ((tty)->termios->c_cc[VSUSP]) -#define EOL_CHAR(tty) ((tty)->termios->c_cc[VEOL]) -#define REPRINT_CHAR(tty) ((tty)->termios->c_cc[VREPRINT]) -#define DISCARD_CHAR(tty) ((tty)->termios->c_cc[VDISCARD]) -#define WERASE_CHAR(tty) ((tty)->termios->c_cc[VWERASE]) -#define LNEXT_CHAR(tty) ((tty)->termios->c_cc[VLNEXT]) -#define EOL2_CHAR(tty) ((tty)->termios->c_cc[VEOL2]) +#define INTR_CHAR(tty) ((tty)->termios.c_cc[VINTR]) +#define QUIT_CHAR(tty) ((tty)->termios.c_cc[VQUIT]) +#define ERASE_CHAR(tty) ((tty)->termios.c_cc[VERASE]) +#define KILL_CHAR(tty) ((tty)->termios.c_cc[VKILL]) +#define EOF_CHAR(tty) ((tty)->termios.c_cc[VEOF]) +#define TIME_CHAR(tty) ((tty)->termios.c_cc[VTIME]) +#define MIN_CHAR(tty) ((tty)->termios.c_cc[VMIN]) +#define SWTC_CHAR(tty) ((tty)->termios.c_cc[VSWTC]) +#define START_CHAR(tty) ((tty)->termios.c_cc[VSTART]) +#define STOP_CHAR(tty) ((tty)->termios.c_cc[VSTOP]) +#define SUSP_CHAR(tty) ((tty)->termios.c_cc[VSUSP]) +#define EOL_CHAR(tty) ((tty)->termios.c_cc[VEOL]) +#define REPRINT_CHAR(tty) ((tty)->termios.c_cc[VREPRINT]) +#define DISCARD_CHAR(tty) ((tty)->termios.c_cc[VDISCARD]) +#define WERASE_CHAR(tty) ((tty)->termios.c_cc[VWERASE]) +#define LNEXT_CHAR(tty) ((tty)->termios.c_cc[VLNEXT]) +#define EOL2_CHAR(tty) ((tty)->termios.c_cc[VEOL2]) -#define _I_FLAG(tty, f) ((tty)->termios->c_iflag & (f)) -#define _O_FLAG(tty, f) ((tty)->termios->c_oflag & (f)) -#define _C_FLAG(tty, f) ((tty)->termios->c_cflag & (f)) -#define _L_FLAG(tty, f) ((tty)->termios->c_lflag & (f)) +#define _I_FLAG(tty, f) ((tty)->termios.c_iflag & (f)) +#define _O_FLAG(tty, f) ((tty)->termios.c_oflag & (f)) +#define _C_FLAG(tty, f) ((tty)->termios.c_cflag & (f)) +#define _L_FLAG(tty, f) ((tty)->termios.c_lflag & (f)) #define I_IGNBRK(tty) _I_FLAG((tty), IGNBRK) #define I_BRKINT(tty) _I_FLAG((tty), BRKINT) @@ -271,7 +271,7 @@ struct tty_struct { struct mutex termios_mutex; spinlock_t ctrl_lock; /* Termios values are protected by the termios mutex */ - struct ktermios *termios, *termios_locked; + struct ktermios termios, termios_locked; struct termiox *termiox; /* May be NULL for unsupported */ char name[64]; struct pid *pgrp; /* Protected by ctrl lock */ diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index d1820ff14ae..363bca12f00 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -866,7 +866,7 @@ static int rfcomm_tty_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned l static void rfcomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old) { - struct ktermios *new = tty->termios; + struct ktermios *new = &tty->termios; int old_baud_rate = tty_termios_baud_rate(old); int new_baud_rate = tty_termios_baud_rate(new); diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 4e35b45c1c7..7a0d6115d06 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -292,7 +292,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, return 0; } - if (tty->termios->c_cflag & CLOCAL) { + if (tty->termios.c_cflag & CLOCAL) { IRDA_DEBUG(1, "%s(), doing CLOCAL!\n", __func__ ); do_clocal = 1; } @@ -319,7 +319,7 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, port->blocked_open++; while (1) { - if (tty->termios->c_cflag & CBAUD) + if (tty->termios.c_cflag & CBAUD) tty_port_raise_dtr_rts(port); current->state = TASK_INTERRUPTIBLE; @@ -421,8 +421,8 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) * * Note this is completely usafe and doesn't work properly */ - tty->termios->c_iflag = 0; - tty->termios->c_oflag = 0; + tty->termios.c_iflag = 0; + tty->termios.c_oflag = 0; /* Insert into hash */ /* FIXME there is a window from find to here */ @@ -842,7 +842,7 @@ static void ircomm_tty_throttle(struct tty_struct *tty) ircomm_tty_send_xchar(tty, STOP_CHAR(tty)); /* Hardware flow control? */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { self->settings.dte &= ~IRCOMM_RTS; self->settings.dte |= IRCOMM_DELTA_RTS; @@ -874,7 +874,7 @@ static void ircomm_tty_unthrottle(struct tty_struct *tty) } /* Using hardware flow control? */ - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { self->settings.dte |= (IRCOMM_RTS|IRCOMM_DELTA_RTS); ircomm_param_request(self, IRCOMM_DTE, TRUE); diff --git a/net/irda/ircomm/ircomm_tty_ioctl.c b/net/irda/ircomm/ircomm_tty_ioctl.c index 0eab6500e99..b343f50dc8d 100644 --- a/net/irda/ircomm/ircomm_tty_ioctl.c +++ b/net/irda/ircomm/ircomm_tty_ioctl.c @@ -63,7 +63,7 @@ static void ircomm_tty_change_speed(struct ircomm_tty_cb *self, if (!self->ircomm) return; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* byte size and parity */ switch (cflag & CSIZE) { @@ -149,12 +149,12 @@ void ircomm_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data; - unsigned int cflag = tty->termios->c_cflag; + unsigned int cflag = tty->termios.c_cflag; IRDA_DEBUG(2, "%s()\n", __func__ ); if ((cflag == old_termios->c_cflag) && - (RELEVANT_IFLAG(tty->termios->c_iflag) == + (RELEVANT_IFLAG(tty->termios.c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) { return; @@ -173,7 +173,7 @@ void ircomm_tty_set_termios(struct tty_struct *tty, if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) { self->settings.dte |= IRCOMM_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { self->settings.dte |= IRCOMM_RTS; } @@ -182,7 +182,7 @@ void ircomm_tty_set_termios(struct tty_struct *tty, /* Handle turning off CRTSCTS */ if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; ircomm_tty_start(tty); From c97ce276909b0434cd74f9e6c7da37bda59106bb Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 14 Jul 2012 15:32:10 +0100 Subject: [PATCH 052/235] f81232: correct stubbed termios handler Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/f81232.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/usb/serial/f81232.c b/drivers/usb/serial/f81232.c index 42c604bc7ce..79451ee12ca 100644 --- a/drivers/usb/serial/f81232.c +++ b/drivers/usb/serial/f81232.c @@ -177,6 +177,7 @@ static void f81232_set_termios(struct tty_struct *tty, return; /* Do the real work here... */ + tty_termios_copy_hw(&tty->termios, old_termios); } static int f81232_tiocmget(struct tty_struct *tty) From 6a6c8b362be31fd9c1caa776313e0725dbed1cf9 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Sat, 14 Jul 2012 15:32:50 +0100 Subject: [PATCH 053/235] usb, kobil: Sort out some bogus tty handling Stuff noticed while doing the termios conversion. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/kobil_sct.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/usb/serial/kobil_sct.c b/drivers/usb/serial/kobil_sct.c index 0516a9661e2..bf5c74965d3 100644 --- a/drivers/usb/serial/kobil_sct.c +++ b/drivers/usb/serial/kobil_sct.c @@ -192,8 +192,8 @@ static void kobil_init_termios(struct tty_struct *tty) { /* Default to echo off and other sane device settings */ tty->termios.c_lflag = 0; - tty->termios.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE); - tty->termios.c_lflag = IGNBRK | IGNPAR | IXOFF; + tty->termios.c_iflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE); + tty->termios.c_iflag |= IGNBRK | IGNPAR | IXOFF; /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */ tty->termios.c_oflag &= ~ONLCR; } @@ -588,7 +588,7 @@ static void kobil_set_termios(struct tty_struct *tty, if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { /* This device doesn't support ioctl calls */ - tty->termios = *old; + tty_termios_copy_hw(&tty->termios, old); return; } From 9833facf90c625f9757295bda6d970f82132b7be Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 17 Jul 2012 17:05:40 +0100 Subject: [PATCH 054/235] tty: Fix up PPC fallout from the termios move This fixes up the problem Stephen Rothwell reported when trying to merge -next Signed-off-by: Alan Cox Reported-by: Stephen Rothwell Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_ioctl.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c index d3c2bda1e46..12b1fa0f4f8 100644 --- a/drivers/tty/tty_ioctl.c +++ b/drivers/tty/tty_ioctl.c @@ -738,27 +738,27 @@ static int get_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb) static void set_sgflags(struct ktermios *termios, int flags) { - termios.c_iflag = ICRNL | IXON; - termios.c_oflag = 0; - termios.c_lflag = ISIG | ICANON; + termios->c_iflag = ICRNL | IXON; + termios->c_oflag = 0; + termios->c_lflag = ISIG | ICANON; if (flags & 0x02) { /* cbreak */ - termios.c_iflag = 0; - termios.c_lflag &= ~ICANON; + termios->c_iflag = 0; + termios->c_lflag &= ~ICANON; } if (flags & 0x08) { /* echo */ - termios.c_lflag |= ECHO | ECHOE | ECHOK | + termios->c_lflag |= ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE | IEXTEN; } if (flags & 0x10) { /* crmod */ - termios.c_oflag |= OPOST | ONLCR; + termios->c_oflag |= OPOST | ONLCR; } if (flags & 0x20) { /* raw */ - termios.c_iflag = 0; - termios.c_lflag &= ~(ISIG | ICANON); + termios->c_iflag = 0; + termios->c_lflag &= ~(ISIG | ICANON); } - if (!(termios.c_lflag & ICANON)) { - termios.c_cc[VMIN] = 1; - termios.c_cc[VTIME] = 0; + if (!(termios->c_lflag & ICANON)) { + termios->c_cc[VMIN] = 1; + termios->c_cc[VTIME] = 0; } } From ce7240e445303de3ca66e6d08f17a2ec278a5bf6 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 17 Jul 2012 17:06:20 +0100 Subject: [PATCH 055/235] 8250: three way resolve of the 8250 diffs This resolves the differences between the original 8250 patch, the revised 8250 patch and the independant clean up of the octeon driver (to use platform devices properly yay!) Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/mwave/mwavedd.c | 16 +++++++-------- drivers/misc/ibmasm/uart.c | 16 +++++++-------- drivers/net/ethernet/sgi/ioc3-eth.c | 20 ++++++++++-------- drivers/tty/serial/8250/8250.h | 30 --------------------------- drivers/tty/serial/8250/8250_dw.c | 2 +- drivers/tty/serial/of_serial.c | 9 +++++++- include/linux/serial_8250.h | 32 +++++++++++++++++++++++++++-- 7 files changed, 66 insertions(+), 59 deletions(-) diff --git a/drivers/char/mwave/mwavedd.c b/drivers/char/mwave/mwavedd.c index 1d82d5838f0..164544afd68 100644 --- a/drivers/char/mwave/mwavedd.c +++ b/drivers/char/mwave/mwavedd.c @@ -430,7 +430,7 @@ static ssize_t mwave_write(struct file *file, const char __user *buf, static int register_serial_portandirq(unsigned int port, int irq) { - struct uart_port uart; + struct uart_8250_port uart; switch ( port ) { case 0x3f8: @@ -462,14 +462,14 @@ static int register_serial_portandirq(unsigned int port, int irq) } /* switch */ /* irq is okay */ - memset(&uart, 0, sizeof(struct uart_port)); + memset(&uart, 0, sizeof(uart)); - uart.uartclk = 1843200; - uart.iobase = port; - uart.irq = irq; - uart.iotype = UPIO_PORT; - uart.flags = UPF_SHARE_IRQ; - return serial8250_register_port(&uart); + uart.port.uartclk = 1843200; + uart.port.iobase = port; + uart.port.irq = irq; + uart.port.iotype = UPIO_PORT; + uart.port.flags = UPF_SHARE_IRQ; + return serial8250_register_8250_port(&uart); } diff --git a/drivers/misc/ibmasm/uart.c b/drivers/misc/ibmasm/uart.c index 1dcb9ae1905..01e2b0d7e59 100644 --- a/drivers/misc/ibmasm/uart.c +++ b/drivers/misc/ibmasm/uart.c @@ -33,7 +33,7 @@ void ibmasm_register_uart(struct service_processor *sp) { - struct uart_port uport; + struct uart_8250_port uart; void __iomem *iomem_base; iomem_base = sp->base_address + SCOUT_COM_B_BASE; @@ -47,14 +47,14 @@ void ibmasm_register_uart(struct service_processor *sp) return; } - memset(&uport, 0, sizeof(struct uart_port)); - uport.irq = sp->irq; - uport.uartclk = 3686400; - uport.flags = UPF_SHARE_IRQ; - uport.iotype = UPIO_MEM; - uport.membase = iomem_base; + memset(&uart, 0, sizeof(uart)); + uart.port.irq = sp->irq; + uart.port.uartclk = 3686400; + uart.port.flags = UPF_SHARE_IRQ; + uart.port.iotype = UPIO_MEM; + uart.port.membase = iomem_base; - sp->serial_line = serial8250_register_port(&uport); + sp->serial_line = serial8250_register_8250_port(&uart); if (sp->serial_line < 0) { dev_err(sp->dev, "Failed to register serial port\n"); return; diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c index ac149d99f78..fcb5b0e0f26 100644 --- a/drivers/net/ethernet/sgi/ioc3-eth.c +++ b/drivers/net/ethernet/sgi/ioc3-eth.c @@ -1147,15 +1147,17 @@ static void __devinit ioc3_8250_register(struct ioc3_uartregs __iomem *uart) { #define COSMISC_CONSTANT 6 - struct uart_port port = { - .irq = 0, - .flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF, - .iotype = UPIO_MEM, - .regshift = 0, - .uartclk = (22000000 << 1) / COSMISC_CONSTANT, + struct uart_8250_port port = { + .port = { + .irq = 0, + .flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF, + .iotype = UPIO_MEM, + .regshift = 0, + .uartclk = (22000000 << 1) / COSMISC_CONSTANT, - .membase = (unsigned char __iomem *) uart, - .mapbase = (unsigned long) uart, + .membase = (unsigned char __iomem *) uart, + .mapbase = (unsigned long) uart, + } }; unsigned char lcr; @@ -1164,7 +1166,7 @@ static void __devinit ioc3_8250_register(struct ioc3_uartregs __iomem *uart) uart->iu_scr = COSMISC_CONSTANT, uart->iu_lcr = lcr; uart->iu_lcr; - serial8250_register_port(&port); + serial8250_register_8250_port(&port); } static void __devinit ioc3_serial_probe(struct pci_dev *pdev, struct ioc3 *ioc3) diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index c335b2b23a5..972b5212b58 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -13,36 +13,6 @@ #include -struct uart_8250_port { - struct uart_port port; - struct timer_list timer; /* "no irq" timer */ - struct list_head list; /* ports on this IRQ */ - unsigned short capabilities; /* port capabilities */ - unsigned short bugs; /* port bugs */ - unsigned int tx_loadsz; /* transmit fifo load size */ - unsigned char acr; - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned char mcr_mask; /* mask of user bits */ - unsigned char mcr_force; /* mask of forced bits */ - unsigned char cur_iotype; /* Running I/O type */ - - /* - * Some bits in registers are cleared on a read, so they must - * be saved whenever the register is read but the bits will not - * be immediately processed. - */ -#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS - unsigned char lsr_saved_flags; -#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA - unsigned char msr_saved_flags; - - /* 8250 specific callbacks */ - int (*dl_read)(struct uart_8250_port *); - void (*dl_write)(struct uart_8250_port *, int); -}; - struct old_serial_port { unsigned int uart; unsigned int baud_base; diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index afb955fdef0..c3b2ec0c8c0 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -141,7 +141,7 @@ static int __devinit dw8250_probe(struct platform_device *pdev) dev_err(&pdev->dev, "no clock-frequency property set\n"); return -EINVAL; } - uart.uart.port.uartclk = val; + uart.port.uartclk = val; data->line = serial8250_register_8250_port(&uart); if (data->line < 0) diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index 34e71874a89..ffc7879e85a 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -144,8 +144,15 @@ static int __devinit of_platform_serial_probe(struct platform_device *ofdev) switch (port_type) { #ifdef CONFIG_SERIAL_8250 case PORT_8250 ... PORT_MAX_8250: - ret = serial8250_register_port(&port); + { + /* For now the of bindings don't support the extra + 8250 specific bits */ + struct uart_8250_port port8250; + memset(&port8250, 0, sizeof(port8250)); + port8250.port = port; + ret = serial8250_register_8250_port(&port8250); break; + } #endif #ifdef CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL case PORT_NWPSERIAL: diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h index f41dcc94921..c174c90fb3f 100644 --- a/include/linux/serial_8250.h +++ b/include/linux/serial_8250.h @@ -65,8 +65,36 @@ enum { * platform device. Using these will make your driver * dependent on the 8250 driver. */ -struct uart_port; -struct uart_8250_port; + +struct uart_8250_port { + struct uart_port port; + struct timer_list timer; /* "no irq" timer */ + struct list_head list; /* ports on this IRQ */ + unsigned short capabilities; /* port capabilities */ + unsigned short bugs; /* port bugs */ + unsigned int tx_loadsz; /* transmit fifo load size */ + unsigned char acr; + unsigned char ier; + unsigned char lcr; + unsigned char mcr; + unsigned char mcr_mask; /* mask of user bits */ + unsigned char mcr_force; /* mask of forced bits */ + unsigned char cur_iotype; /* Running I/O type */ + + /* + * Some bits in registers are cleared on a read, so they must + * be saved whenever the register is read but the bits will not + * be immediately processed. + */ +#define LSR_SAVE_FLAGS UART_LSR_BRK_ERROR_BITS + unsigned char lsr_saved_flags; +#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA + unsigned char msr_saved_flags; + + /* 8250 specific callbacks */ + int (*dl_read)(struct uart_8250_port *); + void (*dl_write)(struct uart_8250_port *, int); +}; int serial8250_register_8250_port(struct uart_8250_port *); void serial8250_unregister_port(int line); From 3db1ddb725dcd9a2bb32be2b64d0688c3e1c4579 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 17 Jul 2012 17:06:41 +0100 Subject: [PATCH 056/235] vt: fix the keyboard/led locking We touch the LED from both keyboard callback and direct paths. In one case we've got the lock held way up the call chain and in the other we haven't. This leads to complete insanity so fix it by giving the LED bits their own lock. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/keyboard.c | 41 ++++++++++++++++++++++----------------- include/linux/kbd_kern.h | 1 - 2 files changed, 23 insertions(+), 19 deletions(-) diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index 9b4f60a6ab0..681765baef6 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -119,6 +119,7 @@ static const int NR_TYPES = ARRAY_SIZE(max_vals); static struct input_handler kbd_handler; static DEFINE_SPINLOCK(kbd_event_lock); +static DEFINE_SPINLOCK(led_lock); static unsigned long key_down[BITS_TO_LONGS(KEY_CNT)]; /* keyboard key bitmap */ static unsigned char shift_down[NR_SHIFT]; /* shift state counters.. */ static bool dead_key_next; @@ -984,7 +985,7 @@ static void k_brl(struct vc_data *vc, unsigned char value, char up_flag) * or (ii) whatever pattern of lights people want to show using KDSETLED, * or (iii) specified bits of specified words in kernel memory. */ -unsigned char getledstate(void) +static unsigned char getledstate(void) { return ledstate; } @@ -992,7 +993,7 @@ unsigned char getledstate(void) void setledstate(struct kbd_struct *kbd, unsigned int led) { unsigned long flags; - spin_lock_irqsave(&kbd_event_lock, flags); + spin_lock_irqsave(&led_lock, flags); if (!(led & ~7)) { ledioctl = led; kbd->ledmode = LED_SHOW_IOCTL; @@ -1000,7 +1001,7 @@ void setledstate(struct kbd_struct *kbd, unsigned int led) kbd->ledmode = LED_SHOW_FLAGS; set_leds(); - spin_unlock_irqrestore(&kbd_event_lock, flags); + spin_unlock_irqrestore(&led_lock, flags); } static inline unsigned char getleds(void) @@ -1051,8 +1052,11 @@ int vt_get_leds(int console, int flag) { struct kbd_struct * kbd = kbd_table + console; int ret; + unsigned long flags; + spin_lock_irqsave(&led_lock, flags); ret = vc_kbd_led(kbd, flag); + spin_unlock_irqrestore(&led_lock, flags); return ret; } @@ -1088,11 +1092,11 @@ void vt_set_led_state(int console, int leds) void vt_kbd_con_start(int console) { struct kbd_struct * kbd = kbd_table + console; -/* unsigned long flags; */ -/* spin_lock_irqsave(&kbd_event_lock, flags); */ + unsigned long flags; + spin_lock_irqsave(&led_lock, flags); clr_vc_kbd_led(kbd, VC_SCROLLOCK); set_leds(); -/* spin_unlock_irqrestore(&kbd_event_lock, flags); */ + spin_unlock_irqrestore(&led_lock, flags); } /** @@ -1101,21 +1105,15 @@ void vt_kbd_con_start(int console) * * Handle console stop. This is a wrapper for the VT layer * so that we can keep kbd knowledge internal - * - * FIXME: We eventually need to hold the kbd lock here to protect - * the LED updating. We can't do it yet because fn_hold calls stop_tty - * and start_tty under the kbd_event_lock, while normal tty paths - * don't hold the lock. We probably need to split out an LED lock - * but not during an -rc release! */ void vt_kbd_con_stop(int console) { struct kbd_struct * kbd = kbd_table + console; -/* unsigned long flags; */ -/* spin_lock_irqsave(&kbd_event_lock, flags); */ + unsigned long flags; + spin_lock_irqsave(&led_lock, flags); set_vc_kbd_led(kbd, VC_SCROLLOCK); set_leds(); -/* spin_unlock_irqrestore(&kbd_event_lock, flags); */ + spin_unlock_irqrestore(&led_lock, flags); } /* @@ -1127,7 +1125,12 @@ void vt_kbd_con_stop(int console) */ static void kbd_bh(unsigned long dummy) { - unsigned char leds = getleds(); + unsigned char leds; + unsigned long flags; + + spin_lock_irqsave(&led_lock, flags); + leds = getleds(); + spin_unlock_irqrestore(&led_lock, flags); if (leds != ledstate) { input_handler_for_each_handle(&kbd_handler, &leds, @@ -2032,11 +2035,11 @@ int vt_do_kdskled(int console, int cmd, unsigned long arg, int perm) return -EPERM; if (arg & ~0x77) return -EINVAL; - spin_lock_irqsave(&kbd_event_lock, flags); + spin_lock_irqsave(&led_lock, flags); kbd->ledflagstate = (arg & 7); kbd->default_ledflagstate = ((arg >> 4) & 7); set_leds(); - spin_unlock_irqrestore(&kbd_event_lock, flags); + spin_unlock_irqrestore(&led_lock, flags); return 0; /* the ioctls below only set the lights, not the functions */ @@ -2131,8 +2134,10 @@ void vt_reset_keyboard(int console) clr_vc_kbd_mode(kbd, VC_CRLF); kbd->lockstate = 0; kbd->slockstate = 0; + spin_lock(&led_lock); kbd->ledmode = LED_SHOW_FLAGS; kbd->ledflagstate = kbd->default_ledflagstate; + spin_unlock(&led_lock); /* do not do set_leds here because this causes an endless tasklet loop when the keyboard hasn't been initialized yet */ spin_unlock_irqrestore(&kbd_event_lock, flags); diff --git a/include/linux/kbd_kern.h b/include/linux/kbd_kern.h index af9137db303..b7c8cdc1d42 100644 --- a/include/linux/kbd_kern.h +++ b/include/linux/kbd_kern.h @@ -65,7 +65,6 @@ struct kbd_struct { extern int kbd_init(void); -extern unsigned char getledstate(void); extern void setledstate(struct kbd_struct *kbd, unsigned int led); extern int do_poke_blanked_console; From 36b3c070d2346c890d690d71f6eab02f8c511137 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 17 Jul 2012 17:06:57 +0100 Subject: [PATCH 057/235] tty: Move the handling of the tty release logic Now that we don't have tty->termios tied to drivers->tty we can untangle the logic here. In addition we can push the removal logic out of the destructor path. At that point we can think about sorting out tty_port and console and all the other ugly hangovers. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 12 ++----- drivers/tty/tty_io.c | 56 ++++++++++++++++----------------- drivers/tty/vt/vt.c | 1 - drivers/usb/serial/usb-serial.c | 3 +- include/linux/tty.h | 1 - include/linux/tty_driver.h | 11 ++----- 6 files changed, 34 insertions(+), 50 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 5ad7ccc49f7..60c08ce8378 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -527,12 +527,6 @@ static struct tty_struct *pts_unix98_lookup(struct tty_driver *driver, return tty; } -static void pty_unix98_shutdown(struct tty_struct *tty) -{ - tty_driver_remove_tty(tty->driver, tty); - /* We have our own method as we don't use the tty index */ -} - /* We have no need to install and remove our tty objects as devpts does all the work for us */ @@ -558,9 +552,8 @@ static const struct tty_operations ptm_unix98_ops = { .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, .ioctl = pty_unix98_ioctl, - .shutdown = pty_unix98_shutdown, - .cleanup = pty_cleanup, - .resize = pty_resize + .resize = pty_resize, + .cleanup = pty_cleanup }; static const struct tty_operations pty_unix98_ops = { @@ -575,7 +568,6 @@ static const struct tty_operations pty_unix98_ops = { .chars_in_buffer = pty_chars_in_buffer, .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, - .shutdown = pty_unix98_shutdown, .cleanup = pty_cleanup, }; diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index cfd12da8121..be18d60ddf4 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1249,16 +1249,16 @@ int tty_init_termios(struct tty_struct *tty) struct ktermios *tp; int idx = tty->index; - tp = tty->driver->termios[idx]; - if (tp == NULL) { - tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL); - if (tp == NULL) - return -ENOMEM; - *tp = tty->driver->init_termios; - tty->driver->termios[idx] = tp; + if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) + tty->termios = tty->driver->init_termios; + else { + /* Check for lazy saved data */ + tp = tty->driver->termios[idx]; + if (tp != NULL) + tty->termios = *tp; + else + tty->termios = tty->driver->init_termios; } - tty->termios = *tp; - /* Compatibility until drivers always set this */ tty->termios.c_ispeed = tty_termios_input_baud_rate(&tty->termios); tty->termios.c_ospeed = tty_termios_baud_rate(&tty->termios); @@ -1437,24 +1437,24 @@ void tty_free_termios(struct tty_struct *tty) { struct ktermios *tp; int idx = tty->index; - /* Kill this flag and push into drivers for locking etc */ - if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) { - /* FIXME: Locking on ->termios array */ - tp = tty->driver->termios[idx]; - tty->driver->termios[idx] = NULL; - kfree(tp); + + /* If the port is going to reset then it has no termios to save */ + if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS) + return; + + /* Stash the termios data */ + tp = tty->driver->termios[idx]; + if (tp == NULL) { + tp = kmalloc(sizeof(struct ktermios), GFP_KERNEL); + if (tp == NULL) { + pr_warn("tty: no memory to save termios state.\n"); + return; + } } - else - *tty->driver->termios[idx] = tty->termios; + *tp = tty->termios; } EXPORT_SYMBOL(tty_free_termios); -void tty_shutdown(struct tty_struct *tty) -{ - tty_driver_remove_tty(tty->driver, tty); - tty_free_termios(tty); -} -EXPORT_SYMBOL(tty_shutdown); /** * release_one_tty - release tty structure memory @@ -1498,11 +1498,6 @@ static void queue_release_one_tty(struct kref *kref) { struct tty_struct *tty = container_of(kref, struct tty_struct, kref); - if (tty->ops->shutdown) - tty->ops->shutdown(tty); - else - tty_shutdown(tty); - /* The hangup queue is now free so we can reuse it rather than waste a chunk of memory for each port */ INIT_WORK(&tty->hangup_work, release_one_tty); @@ -1542,6 +1537,11 @@ static void release_tty(struct tty_struct *tty, int idx) /* This should always be true but check for the moment */ WARN_ON(tty->index != idx); + if (tty->ops->shutdown) + tty->ops->shutdown(tty); + tty_free_termios(tty); + tty_driver_remove_tty(tty->driver, tty); + if (tty->link) tty_kref_put(tty->link); tty_kref_put(tty); diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index dbceaeb2c3e..e07ded30fc7 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -2850,7 +2850,6 @@ static void con_shutdown(struct tty_struct *tty) console_lock(); vc->port.tty = NULL; console_unlock(); - tty_shutdown(tty); } static int default_italic_color = 2; // green (ASCII) diff --git a/drivers/usb/serial/usb-serial.c b/drivers/usb/serial/usb-serial.c index 5fe21357b55..aa4b0d77599 100644 --- a/drivers/usb/serial/usb-serial.c +++ b/drivers/usb/serial/usb-serial.c @@ -305,8 +305,7 @@ static void serial_close(struct tty_struct *tty, struct file *filp) * Do the resource freeing and refcount dropping for the port. * Avoid freeing the console. * - * Called asynchronously after the last tty kref is dropped, - * and the tty layer has already done the tty_shutdown(tty); + * Called asynchronously after the last tty kref is dropped. */ static void serial_cleanup(struct tty_struct *tty) { diff --git a/include/linux/tty.h b/include/linux/tty.h index d5e75ee0f4d..a39e72325e7 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -423,7 +423,6 @@ extern void tty_unthrottle(struct tty_struct *tty); extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws); extern void tty_driver_remove_tty(struct tty_driver *driver, struct tty_struct *tty); -extern void tty_shutdown(struct tty_struct *tty); extern void tty_free_termios(struct tty_struct *tty); extern int is_current_pgrp_orphaned(void); extern struct pid *tty_get_pgrp(struct tty_struct *tty); diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 04419c141b0..80e72dc564a 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -45,14 +45,9 @@ * * void (*shutdown)(struct tty_struct * tty); * - * This routine is called synchronously when a particular tty device - * is closed for the last time freeing up the resources. - * Note that tty_shutdown() is not called if ops->shutdown is defined. - * This means one is responsible to take care of calling ops->remove (e.g. - * via tty_driver_remove_tty) and releasing tty->termios. - * Note that this hook may be called from *all* the contexts where one - * uses tty refcounting (e.g. tty_port_tty_get). - * + * This routine is called under the tty lock when a particular tty device + * is closed for the last time. It executes before the tty resources + * are freed so may execute while another function holds a tty kref. * * void (*cleanup)(struct tty_struct * tty); * From fde8be29239bf4a4118d918df1b2b8ef7266b1a2 Mon Sep 17 00:00:00 2001 From: Gabor Juhos Date: Tue, 17 Jul 2012 17:08:31 +0100 Subject: [PATCH 058/235] tty: of_serial: add no-loopback-test property The loopback test mode is not implemented in all NS16550 compatible UARTs. The 8250 driver uses the UPF_SKIP_TEST flag to indicate this, however it is not possible to set this flag via device-tree. Add a new 'no-loopback-test' property, and modify the of_serial driver to set the UPF_SKIP_TEST flag if the property is present. Signed-off-by: Gabor Juhos Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/tty/serial/of-serial.txt | 2 ++ drivers/tty/serial/of_serial.c | 4 ++++ 2 files changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/tty/serial/of-serial.txt b/Documentation/devicetree/bindings/tty/serial/of-serial.txt index 0847fdeee11..ba385f2e0dd 100644 --- a/Documentation/devicetree/bindings/tty/serial/of-serial.txt +++ b/Documentation/devicetree/bindings/tty/serial/of-serial.txt @@ -25,6 +25,8 @@ Optional properties: accesses to the UART (e.g. TI davinci). - used-by-rtas : set to indicate that the port is in use by the OpenFirmware RTAS and should not be registered. +- no-loopback-test: set to indicate that the port does not implements loopback + test mode Example: diff --git a/drivers/tty/serial/of_serial.c b/drivers/tty/serial/of_serial.c index ffc7879e85a..df443b908ca 100644 --- a/drivers/tty/serial/of_serial.c +++ b/drivers/tty/serial/of_serial.c @@ -105,6 +105,10 @@ static int __devinit of_platform_serial_setup(struct platform_device *ofdev, port->uartclk = clk; port->flags = UPF_SHARE_IRQ | UPF_BOOT_AUTOCONF | UPF_IOREMAP | UPF_FIXED_PORT | UPF_FIXED_TYPE; + + if (of_find_property(np, "no-loopback-test", NULL)) + port->flags |= UPF_SKIP_TEST; + port->dev = &ofdev->dev; if (type == PORT_TEGRA) From 669bd45f117cc8c7309acd6b6bb054fe4d9e46c0 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 2 Jul 2012 18:51:38 +0100 Subject: [PATCH 059/235] pch_uart: Fix missing break for 16 byte fifo Otherwise we fall back to the wrong value. Reported-by: Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=44091 Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index d291518a58a..c5bc23d6ade 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1266,6 +1266,7 @@ static int pch_uart_startup(struct uart_port *port) break; case 16: fifo_size = PCH_UART_HAL_FIFO16; + break; case 1: default: fifo_size = PCH_UART_HAL_FIFO_DIS; From ae213f30358e5bf68a05badf059bb4d9115755f5 Mon Sep 17 00:00:00 2001 From: Tomoya MORINAGA Date: Fri, 6 Jul 2012 17:19:42 +0900 Subject: [PATCH 060/235] pch_uart: Fix rx error interrupt setting issue Rx Error interrupt(E.G. parity error) is not enabled. So, when parity error occurs, error interrupt is not occurred. As a result, the received data is not dropped. This patch adds enable/disable rx error interrupt code. Signed-off-by: Tomoya MORINAGA Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index c5bc23d6ade..2cc9b469462 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -757,7 +757,8 @@ static void pch_dma_rx_complete(void *arg) tty_flip_buffer_push(tty); tty_kref_put(tty); async_tx_ack(priv->desc_rx); - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT); + pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); } static void pch_dma_tx_complete(void *arg) @@ -812,7 +813,8 @@ static int handle_rx_to(struct eg20t_port *priv) int rx_size; int ret; if (!priv->start_rx) { - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT); + pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); return 0; } buf = &priv->rxbuf; @@ -1081,11 +1083,13 @@ static irqreturn_t pch_uart_interrupt(int irq, void *dev_id) case PCH_UART_IID_RDR: /* Received Data Ready */ if (priv->use_dma) { pch_uart_hal_disable_interrupt(priv, - PCH_UART_HAL_RX_INT); + PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); ret = dma_handle_rx(priv); if (!ret) pch_uart_hal_enable_interrupt(priv, - PCH_UART_HAL_RX_INT); + PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); } else { ret = handle_rx(priv); } @@ -1211,7 +1215,8 @@ static void pch_uart_stop_rx(struct uart_port *port) struct eg20t_port *priv; priv = container_of(port, struct eg20t_port, port); priv->start_rx = 0; - pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT); + pch_uart_hal_disable_interrupt(priv, PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); } /* Enable the modem status interrupts. */ @@ -1304,7 +1309,8 @@ static int pch_uart_startup(struct uart_port *port) pch_request_dma(port); priv->start_rx = 1; - pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT); + pch_uart_hal_enable_interrupt(priv, PCH_UART_HAL_RX_INT | + PCH_UART_HAL_RX_ERR_INT); uart_update_timeout(port, CS8, default_baud); return 0; From 2fc39aebf682bed97a78d278f6adf6c395700d19 Mon Sep 17 00:00:00 2001 From: Tomoya MORINAGA Date: Fri, 6 Jul 2012 17:19:43 +0900 Subject: [PATCH 061/235] pch_uart: Fix parity setting issue Parity Setting value is reverse. E.G. In case of setting ODD parity, EVEN value is set. This patch inverts "if" condition. Signed-off-by: Tomoya MORINAGA Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 2cc9b469462..558ce8509a9 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -1368,7 +1368,7 @@ static void pch_uart_set_termios(struct uart_port *port, stb = PCH_UART_HAL_STB1; if (termios->c_cflag & PARENB) { - if (!(termios->c_cflag & PARODD)) + if (termios->c_cflag & PARODD) parity = PCH_UART_HAL_PARITY_ODD; else parity = PCH_UART_HAL_PARITY_EVEN; From 373f5aedbc6fb73d30f00eeb0dc7313ecfede908 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 19 Jul 2012 12:23:28 +0100 Subject: [PATCH 062/235] pcmcia,synclink_cs: fix termios port I missed Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 0a484b4a1b0..d0cbd29ecfd 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -1344,7 +1344,7 @@ static void shutdown(MGSLPC_INFO * info, struct tty_struct *tty) /* TODO:disable interrupts instead of reset to preserve signal states */ reset_device(info); - if (!tty || tty->termios->c_cflag & HUPCL) { + if (!tty || tty->termios.c_cflag & HUPCL) { info->serial_signals &= ~(SerialSignal_DTR + SerialSignal_RTS); set_signals(info); } @@ -1385,7 +1385,7 @@ static void mgslpc_program_hw(MGSLPC_INFO *info, struct tty_struct *tty) port_irq_enable(info, (unsigned char) PVR_DSR | PVR_RI); get_signals(info); - if (info->netcount || (tty && (tty->termios->c_cflag & CREAD))) + if (info->netcount || (tty && (tty->termios.c_cflag & CREAD))) rx_start(info); spin_unlock_irqrestore(&info->lock,flags); @@ -1398,14 +1398,14 @@ static void mgslpc_change_params(MGSLPC_INFO *info, struct tty_struct *tty) unsigned cflag; int bits_per_char; - if (!tty || !tty->termios) + if (!tty) return; if (debug_level >= DEBUG_LEVEL_INFO) printk("%s(%d):mgslpc_change_params(%s)\n", __FILE__,__LINE__, info->device_name ); - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* if B0 rate (hangup) specified then negate DTR and RTS */ /* otherwise assert DTR and RTS */ @@ -1728,7 +1728,7 @@ static void mgslpc_throttle(struct tty_struct * tty) if (I_IXOFF(tty)) mgslpc_send_xchar(tty, STOP_CHAR(tty)); - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->serial_signals &= ~SerialSignal_RTS; set_signals(info); @@ -1757,7 +1757,7 @@ static void mgslpc_unthrottle(struct tty_struct * tty) mgslpc_send_xchar(tty, START_CHAR(tty)); } - if (tty->termios->c_cflag & CRTSCTS) { + if (tty->termios.c_cflag & CRTSCTS) { spin_lock_irqsave(&info->lock,flags); info->serial_signals |= SerialSignal_RTS; set_signals(info); @@ -2293,8 +2293,8 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term tty->driver->name ); /* just return if nothing has changed */ - if ((tty->termios->c_cflag == old_termios->c_cflag) - && (RELEVANT_IFLAG(tty->termios->c_iflag) + if ((tty->termios.c_cflag == old_termios->c_cflag) + && (RELEVANT_IFLAG(tty->termios.c_iflag) == RELEVANT_IFLAG(old_termios->c_iflag))) return; @@ -2302,7 +2302,7 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term /* Handle transition to B0 status */ if (old_termios->c_cflag & CBAUD && - !(tty->termios->c_cflag & CBAUD)) { + !(tty->termios.c_cflag & CBAUD)) { info->serial_signals &= ~(SerialSignal_RTS + SerialSignal_DTR); spin_lock_irqsave(&info->lock,flags); set_signals(info); @@ -2311,9 +2311,9 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term /* Handle transition away from B0 status */ if (!(old_termios->c_cflag & CBAUD) && - tty->termios->c_cflag & CBAUD) { + tty->termios.c_cflag & CBAUD) { info->serial_signals |= SerialSignal_DTR; - if (!(tty->termios->c_cflag & CRTSCTS) || + if (!(tty->termios.c_cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags)) { info->serial_signals |= SerialSignal_RTS; } @@ -2324,7 +2324,7 @@ static void mgslpc_set_termios(struct tty_struct *tty, struct ktermios *old_term /* Handle turning off CRTSCTS */ if (old_termios->c_cflag & CRTSCTS && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; tx_release(tty); } From d155255a344c417acad74156654295a2964e6b81 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Fri, 27 Jul 2012 18:02:54 +0100 Subject: [PATCH 063/235] tty: Fix race in tty release Ian Abbott found that the tty layer would explode with the right set of parallel open and close operations. This is because we race in the handling of tty->drivers->termios[]. Correct this by Making tty_ldisc_release behave like nromal code (takes the lock, does stuff, drops the lock) Drop the tty lock earlier in tty_ldisc_release Taking the tty mutex around the driver->termios update in all cases Adding a WARN_ON to catch future screwups. I also forgot to clean up the pty resources properly. With a pty pair we need to pull both halves out of the tables. Signed-off-by: Alan Cox Tested-by: Ian Abbott Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 25 +++++++++++++++++++++++-- drivers/tty/tty_io.c | 20 ++++++++++++-------- drivers/tty/tty_ldisc.c | 3 ++- 3 files changed, 37 insertions(+), 11 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 60c08ce8378..d6579a9064c 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -282,6 +282,17 @@ done: return 0; } +/** + * pty_common_install - set up the pty pair + * @driver: the pty driver + * @tty: the tty being instantiated + * @bool: legacy, true if this is BSD style + * + * Perform the initial set up for the tty/pty pair. Called from the + * tty layer when the port is first opened. + * + * Locking: the caller must hold the tty_mutex + */ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, bool legacy) { @@ -364,6 +375,14 @@ static int pty_install(struct tty_driver *driver, struct tty_struct *tty) return pty_common_install(driver, tty, true); } +static void pty_remove(struct tty_driver *driver, struct tty_struct *tty) +{ + struct tty_struct *pair = tty->link; + driver->ttys[tty->index] = NULL; + if (pair) + pair->driver->ttys[pair->index] = NULL; +} + static int pty_bsd_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { @@ -395,7 +414,8 @@ static const struct tty_operations master_pty_ops_bsd = { .set_termios = pty_set_termios, .ioctl = pty_bsd_ioctl, .cleanup = pty_cleanup, - .resize = pty_resize + .resize = pty_resize, + .remove = pty_remove }; static const struct tty_operations slave_pty_ops_bsd = { @@ -409,7 +429,8 @@ static const struct tty_operations slave_pty_ops_bsd = { .unthrottle = pty_unthrottle, .set_termios = pty_set_termios, .cleanup = pty_cleanup, - .resize = pty_resize + .resize = pty_resize, + .remove = pty_remove }; static void __init legacy_pty_init(void) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index be18d60ddf4..c6f4d711771 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1465,7 +1465,6 @@ EXPORT_SYMBOL(tty_free_termios); * in use. It also gets called when setup of a device fails. * * Locking: - * tty_mutex - sometimes only * takes the file list lock internally when working on the list * of ttys that the driver keeps. * @@ -1526,17 +1525,16 @@ EXPORT_SYMBOL(tty_kref_put); * and decrement the refcount of the backing module. * * Locking: - * tty_mutex - sometimes only + * tty_mutex * takes the file list lock internally when working on the list * of ttys that the driver keeps. - * FIXME: should we require tty_mutex is held here ?? * */ static void release_tty(struct tty_struct *tty, int idx) { /* This should always be true but check for the moment */ WARN_ON(tty->index != idx); - + WARN_ON(!mutex_is_locked(&tty_mutex)); if (tty->ops->shutdown) tty->ops->shutdown(tty); tty_free_termios(tty); @@ -1708,6 +1706,9 @@ int tty_release(struct inode *inode, struct file *filp) * The closing flags are now consistent with the open counts on * both sides, and we've completed the last operation that could * block, so it's safe to proceed with closing. + * + * We must *not* drop the tty_mutex until we ensure that a further + * entry into tty_open can not pick up this tty. */ if (pty_master) { if (--o_tty->count < 0) { @@ -1759,12 +1760,13 @@ int tty_release(struct inode *inode, struct file *filp) } mutex_unlock(&tty_mutex); + tty_unlock(); + /* At this point the TTY_CLOSING flag should ensure a dead tty + cannot be re-opened by a racing opener */ /* check whether both sides are closing ... */ - if (!tty_closing || (o_tty && !o_tty_closing)) { - tty_unlock(); + if (!tty_closing || (o_tty && !o_tty_closing)) return 0; - } #ifdef TTY_DEBUG_HANGUP printk(KERN_DEBUG "%s: freeing tty structure...\n", __func__); @@ -1777,12 +1779,14 @@ int tty_release(struct inode *inode, struct file *filp) * The release_tty function takes care of the details of clearing * the slots and preserving the termios structure. */ + mutex_lock(&tty_mutex); release_tty(tty, idx); + mutex_unlock(&tty_mutex); /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); - tty_unlock(); + return 0; } diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index e6156c60d19..3d0687197d0 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -912,7 +912,6 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) * race with the set_ldisc code path. */ - tty_unlock(); tty_ldisc_halt(tty); tty_ldisc_flush_works(tty); tty_lock(); @@ -930,6 +929,8 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) tty_set_termios_ldisc(tty, N_TTY); mutex_unlock(&tty->ldisc_mutex); + tty_unlock(); + /* This will need doing differently if we need to lock */ if (o_tty) tty_ldisc_release(o_tty, NULL); From 2d8a1001ee0e961a00ab460ff54ea9a321a56d2e Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Fri, 20 Jul 2012 14:58:31 +1000 Subject: [PATCH 064/235] tty: fix up usb serial console for termios change. fixes these errors: drivers/usb/serial/console.c: In function 'usb_console_setup': drivers/usb/serial/console.c:168:16: error: invalid type argument of '->' (have 'struct ktermios') drivers/usb/serial/console.c:169:4: error: incompatible type for argument 1 of 'tty_termios_encode_baud_rate' include/linux/tty.h:449:13: note: expected 'struct ktermios *' but argument is of type 'struct ktermios' Signed-off-by: Stephen Rothwell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/console.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/serial/console.c b/drivers/usb/serial/console.c index b9cca6dcde0..9a564286bfd 100644 --- a/drivers/usb/serial/console.c +++ b/drivers/usb/serial/console.c @@ -165,8 +165,8 @@ static int usb_console_setup(struct console *co, char *options) } if (serial->type->set_termios) { - tty->termios->c_cflag = cflag; - tty_termios_encode_baud_rate(tty->termios, baud, baud); + tty->termios.c_cflag = cflag; + tty_termios_encode_baud_rate(&tty->termios, baud, baud); memset(&dummy, 0, sizeof(struct ktermios)); serial->type->set_termios(tty, port, &dummy); From 9b12daf70815364d07bc0bbac41468098264f782 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 23 Jul 2012 12:35:44 +0100 Subject: [PATCH 065/235] serqt_usb2: drag screaming into the 21st century Fix the termios stuff but while we are at it do something about the rest of it Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/staging/serqt_usb2/serqt_usb2.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/staging/serqt_usb2/serqt_usb2.c b/drivers/staging/serqt_usb2/serqt_usb2.c index 8a362f7af37..c90de969be8 100644 --- a/drivers/staging/serqt_usb2/serqt_usb2.c +++ b/drivers/staging/serqt_usb2/serqt_usb2.c @@ -315,10 +315,8 @@ static void qt_read_bulk_callback(struct urb *urb) } tty = tty_port_tty_get(&port->port); - if (!tty) { - dbg("%s - bad tty pointer - exiting", __func__); + if (!tty) return; - } data = urb->transfer_buffer; @@ -364,7 +362,7 @@ static void qt_read_bulk_callback(struct urb *urb) goto exit; } - if (tty && RxCount) { + if (RxCount) { flag_data = 0; for (i = 0; i < RxCount; ++i) { /* Look ahead code here */ @@ -428,7 +426,7 @@ static void qt_read_bulk_callback(struct urb *urb) dbg("%s - failed resubmitting read urb, error %d", __func__, result); else { - if (tty && RxCount) { + if (RxCount) { tty_flip_buffer_push(tty); tty_schedule_flip(tty); } @@ -897,8 +895,6 @@ static int qt_open(struct tty_struct *tty, * Put this here to make it responsive to stty and defaults set by * the tty layer */ - /* FIXME: is this needed? */ - /* qt_set_termios(tty, port, NULL); */ /* Check to see if we've set up our endpoint info yet */ if (port0->open_ports == 1) { @@ -1195,7 +1191,7 @@ static void qt_set_termios(struct tty_struct *tty, struct usb_serial_port *port, struct ktermios *old_termios) { - struct ktermios *termios = tty->termios; + struct ktermios *termios = &tty->termios; unsigned char new_LCR = 0; unsigned int cflag = termios->c_cflag; unsigned int index; @@ -1204,7 +1200,7 @@ static void qt_set_termios(struct tty_struct *tty, index = tty->index - port->serial->minor; - switch (cflag) { + switch (cflag & CSIZE) { case CS5: new_LCR |= SERIAL_5_DATA; break; @@ -1215,6 +1211,8 @@ static void qt_set_termios(struct tty_struct *tty, new_LCR |= SERIAL_7_DATA; break; default: + termios->c_cflag &= ~CSIZE; + termios->c_cflag |= CS8; case CS8: new_LCR |= SERIAL_8_DATA; break; @@ -1301,7 +1299,7 @@ static void qt_set_termios(struct tty_struct *tty, dbg(__FILE__ "BoxSetSW_FlowCtrl (diabling) failed\n"); } - tty->termios->c_cflag &= ~CMSPAR; + termios->c_cflag &= ~CMSPAR; /* FIXME: Error cases should be returning the actual bits changed only */ } From 6b9563a714138dc2377c500e588e31f7166c92f0 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 24 Jul 2012 10:59:01 +0100 Subject: [PATCH 066/235] tty: fix the metro-usb change I messed up Fixes the leak of a tty kref that Jiri pointed out. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/usb/serial/metro-usb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/serial/metro-usb.c b/drivers/usb/serial/metro-usb.c index 7ae9af6b2a5..2b0627b5fe2 100644 --- a/drivers/usb/serial/metro-usb.c +++ b/drivers/usb/serial/metro-usb.c @@ -136,8 +136,8 @@ static void metrousb_read_int_callback(struct urb *urb) /* Force the data to the tty layer. */ tty_flip_buffer_push(tty); - tty_kref_put(tty); } + tty_kref_put(tty); /* Set any port variables. */ spin_lock_irqsave(&metro_priv->lock, flags); From 4ac5d7050e4e4d63751e78fb152a274d05c08563 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 24 Jul 2012 12:51:52 +0100 Subject: [PATCH 067/235] tty: fix missing assignment We're trying to save the termios state and we need to allocate a buffer to do it. Smatch complains that the buffer is leaked at the end of the function. Signed-off-by: Dan Carpenter Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index c6f4d711771..608749978df 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1450,6 +1450,7 @@ void tty_free_termios(struct tty_struct *tty) pr_warn("tty: no memory to save termios state.\n"); return; } + tty->driver->termios[idx] = tp; } *tp = tty->termios; } From dc6802a771e91050fb686dfeeb9de4c6c9cadb79 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 24 Jul 2012 12:52:04 +0100 Subject: [PATCH 068/235] tty: handle NULL parameters in free_tty_struct() We sometimes pass NULL pointers to free_tty_struct(). One example where it can happen is in the error handling code in pty_common_install(). Signed-off-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 608749978df..6784aae210e 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -181,6 +181,8 @@ struct tty_struct *alloc_tty_struct(void) void free_tty_struct(struct tty_struct *tty) { + if (!tty) + return; if (tty->dev) put_device(tty->dev); kfree(tty->write_buf); From 89c8d91e31f267703e365593f6bfebb9f6d2ad01 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 8 Aug 2012 16:30:13 +0100 Subject: [PATCH 069/235] tty: localise the lock The termios and other changes mean the other protections needed on the driver tty arrays should be adequate. Turn it all back on. This contains pieces folded in from the fixes made to the original patches | From: Geert Uytterhoeven (fix m68k) | From: Paul Gortmaker (fix cris) | From: Jiri Kosina (lockdep) | From: Eric Dumazet (lockdep) Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/amiserial.c | 14 +++---- drivers/tty/cyclades.c | 2 +- drivers/tty/n_r3964.c | 10 ++--- drivers/tty/pty.c | 27 ++++++++------ drivers/tty/serial/crisv10.c | 8 ++-- drivers/tty/synclink.c | 4 +- drivers/tty/synclink_gt.c | 4 +- drivers/tty/synclinkmp.c | 4 +- drivers/tty/tty_io.c | 66 +++++++++++++++++++-------------- drivers/tty/tty_ldisc.c | 71 ++++++++++++++++++++---------------- drivers/tty/tty_mutex.c | 71 ++++++++++++++++++++++++++++-------- drivers/tty/tty_port.c | 6 +-- include/linux/tty.h | 23 +++++++----- net/bluetooth/rfcomm/tty.c | 4 +- 14 files changed, 192 insertions(+), 122 deletions(-) diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 0e8441e73ee..998731f01d6 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1033,7 +1033,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); - tty_lock(); + tty_lock(tty); tmp.line = tty->index; tmp.port = state->port; tmp.flags = state->tport.flags; @@ -1042,7 +1042,7 @@ static int get_serial_info(struct tty_struct *tty, struct serial_state *state, tmp.close_delay = state->tport.close_delay; tmp.closing_wait = state->tport.closing_wait; tmp.custom_divisor = state->custom_divisor; - tty_unlock(); + tty_unlock(tty); if (copy_to_user(retinfo,&tmp,sizeof(*retinfo))) return -EFAULT; return 0; @@ -1059,12 +1059,12 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, if (copy_from_user(&new_serial,new_info,sizeof(new_serial))) return -EFAULT; - tty_lock(); + tty_lock(tty); change_spd = ((new_serial.flags ^ port->flags) & ASYNC_SPD_MASK) || new_serial.custom_divisor != state->custom_divisor; if (new_serial.irq || new_serial.port != state->port || new_serial.xmit_fifo_size != state->xmit_fifo_size) { - tty_unlock(); + tty_unlock(tty); return -EINVAL; } @@ -1074,7 +1074,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, (new_serial.xmit_fifo_size != state->xmit_fifo_size) || ((new_serial.flags & ~ASYNC_USR_MASK) != (port->flags & ~ASYNC_USR_MASK))) { - tty_unlock(); + tty_unlock(tty); return -EPERM; } port->flags = ((port->flags & ~ASYNC_USR_MASK) | @@ -1084,7 +1084,7 @@ static int set_serial_info(struct tty_struct *tty, struct serial_state *state, } if (new_serial.baud_base < 9600) { - tty_unlock(); + tty_unlock(tty); return -EINVAL; } @@ -1116,7 +1116,7 @@ check_and_exit: } } else retval = startup(tty, state); - tty_unlock(); + tty_unlock(tty); return retval; } diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index e77db714ab2..c8850ea832a 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -1599,7 +1599,7 @@ static int cy_open(struct tty_struct *tty, struct file *filp) * If the port is the middle of closing, bail out now */ if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->port.close_wait, + wait_event_interruptible_tty(tty, info->port.close_wait, !(info->port.flags & ASYNC_CLOSING)); return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS; } diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c index 5c6c31459a2..1e6405070ce 100644 --- a/drivers/tty/n_r3964.c +++ b/drivers/tty/n_r3964.c @@ -1065,7 +1065,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, TRACE_L("read()"); - tty_lock(); + tty_lock(tty); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1077,7 +1077,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, goto unlock; } /* block until there is a message: */ - wait_event_interruptible_tty(pInfo->read_wait, + wait_event_interruptible_tty(tty, pInfo->read_wait, (pMsg = remove_msg(pInfo, pClient))); } @@ -1107,7 +1107,7 @@ static ssize_t r3964_read(struct tty_struct *tty, struct file *file, } ret = -EPERM; unlock: - tty_unlock(); + tty_unlock(tty); return ret; } @@ -1156,7 +1156,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, pHeader->locks = 0; pHeader->owner = NULL; - tty_lock(); + tty_lock(tty); pClient = findClient(pInfo, task_pid(current)); if (pClient) { @@ -1175,7 +1175,7 @@ static ssize_t r3964_write(struct tty_struct *tty, struct file *file, add_tx_queue(pInfo, pHeader); trigger_transmit(pInfo); - tty_unlock(); + tty_unlock(tty); return 0; } diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d6579a9064c..4399f1dbd13 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -47,6 +47,7 @@ static void pty_close(struct tty_struct *tty, struct file *filp) wake_up_interruptible(&tty->read_wait); wake_up_interruptible(&tty->write_wait); tty->packet = 0; + /* Review - krefs on tty_link ?? */ if (!tty->link) return; tty->link->packet = 0; @@ -62,9 +63,9 @@ static void pty_close(struct tty_struct *tty, struct file *filp) mutex_unlock(&devpts_mutex); } #endif - tty_unlock(); + tty_unlock(tty); tty_vhangup(tty->link); - tty_lock(); + tty_lock(tty); } } @@ -617,26 +618,27 @@ static int ptmx_open(struct inode *inode, struct file *filp) return retval; /* find a device that is not in use. */ - tty_lock(); + mutex_lock(&devpts_mutex); index = devpts_new_index(inode); - tty_unlock(); if (index < 0) { retval = index; goto err_file; } - mutex_lock(&tty_mutex); - mutex_lock(&devpts_mutex); - tty = tty_init_dev(ptm_driver, index); mutex_unlock(&devpts_mutex); - tty_lock(); - mutex_unlock(&tty_mutex); + + mutex_lock(&tty_mutex); + tty = tty_init_dev(ptm_driver, index); if (IS_ERR(tty)) { retval = PTR_ERR(tty); goto out; } + /* The tty returned here is locked so we can safely + drop the mutex */ + mutex_unlock(&tty_mutex); + set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */ tty_add_file(tty, filp); @@ -649,16 +651,17 @@ static int ptmx_open(struct inode *inode, struct file *filp) if (retval) goto err_release; - tty_unlock(); + tty_unlock(tty); return 0; err_release: - tty_unlock(); + tty_unlock(tty); tty_release(inode, filp); return retval; out: + mutex_unlock(&tty_mutex); devpts_kill_index(inode, index); - tty_unlock(); err_file: + mutex_unlock(&devpts_mutex); tty_free_file(filp); return retval; } diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 6b705b24352..a770b101296 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -3976,7 +3976,7 @@ block_til_ready(struct tty_struct *tty, struct file * filp, */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, + wait_event_interruptible_tty(tty, info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART if (info->flags & ASYNC_HUP_NOTIFY) @@ -4052,9 +4052,9 @@ block_til_ready(struct tty_struct *tty, struct file * filp, printk("block_til_ready blocking: ttyS%d, count = %d\n", info->line, info->count); #endif - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); remove_wait_queue(&info->open_wait, &wait); @@ -4115,7 +4115,7 @@ rs_open(struct tty_struct *tty, struct file * filp) */ if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) { - wait_event_interruptible_tty(info->close_wait, + wait_event_interruptible_tty(tty, info->close_wait, !(info->flags & ASYNC_CLOSING)); #ifdef SERIAL_DO_RESTART return ((info->flags & ASYNC_HUP_NOTIFY) ? diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index bdeeb3133f6..991bae82123 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3338,9 +3338,9 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, printk("%s(%d):block_til_ready blocking on %s count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index f02d18a391e..913025369fe 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3336,9 +3336,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, } DBGINFO(("%s block_til_ready wait\n", tty->driver->name)); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index ae75a3c21fd..95fd4e20b96 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -3357,9 +3357,9 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp, printk("%s(%d):%s block_til_ready() count=%d\n", __FILE__,__LINE__, tty->driver->name, port->count ); - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 6784aae210e..690224483fa 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -187,6 +187,7 @@ void free_tty_struct(struct tty_struct *tty) put_device(tty->dev); kfree(tty->write_buf); tty_buffer_free_all(tty); + tty->magic = 0xDEADDEAD; kfree(tty); } @@ -575,7 +576,7 @@ void __tty_hangup(struct tty_struct *tty) } spin_unlock(&redirect_lock); - tty_lock(); + tty_lock(tty); /* some functions below drop BTM, so we need this bit */ set_bit(TTY_HUPPING, &tty->flags); @@ -668,7 +669,7 @@ void __tty_hangup(struct tty_struct *tty) clear_bit(TTY_HUPPING, &tty->flags); tty_ldisc_enable(tty); - tty_unlock(); + tty_unlock(tty); if (f) fput(f); @@ -1105,12 +1106,12 @@ void tty_write_message(struct tty_struct *tty, char *msg) { if (tty) { mutex_lock(&tty->atomic_write_lock); - tty_lock(); + tty_lock(tty); if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags)) { - tty_unlock(); + tty_unlock(tty); tty->ops->write(tty, msg, strlen(msg)); } else - tty_unlock(); + tty_unlock(tty); tty_write_unlock(tty); } return; @@ -1403,6 +1404,7 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) } initialize_tty_struct(tty, driver, idx); + tty_lock(tty); retval = tty_driver_install_tty(driver, tty); if (retval < 0) goto err_deinit_tty; @@ -1418,9 +1420,11 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) retval = tty_ldisc_setup(tty, tty->link); if (retval) goto err_release_tty; + /* Return the tty locked so that it cannot vanish under the caller */ return tty; err_deinit_tty: + tty_unlock(tty); deinitialize_tty_struct(tty); free_tty_struct(tty); err_module_put: @@ -1429,6 +1433,7 @@ err_module_put: /* call the tty release_tty routine to clean out this slot */ err_release_tty: + tty_unlock(tty); printk_ratelimited(KERN_INFO "tty_init_dev: ldisc open failed, " "clearing slot %d\n", idx); release_tty(tty, idx); @@ -1622,7 +1627,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty_paranoia_check(tty, inode, __func__)) return 0; - tty_lock(); + tty_lock(tty); check_tty_count(tty, __func__); __tty_fasync(-1, filp, 0); @@ -1631,10 +1636,11 @@ int tty_release(struct inode *inode, struct file *filp) pty_master = (tty->driver->type == TTY_DRIVER_TYPE_PTY && tty->driver->subtype == PTY_TYPE_MASTER); devpts = (tty->driver->flags & TTY_DRIVER_DEVPTS_MEM) != 0; + /* Review: parallel close */ o_tty = tty->link; if (tty_release_checks(tty, o_tty, idx)) { - tty_unlock(); + tty_unlock(tty); return 0; } @@ -1646,7 +1652,7 @@ int tty_release(struct inode *inode, struct file *filp) if (tty->ops->close) tty->ops->close(tty, filp); - tty_unlock(); + tty_unlock(tty); /* * Sanity check: if tty->count is going to zero, there shouldn't be * any waiters on tty->read_wait or tty->write_wait. We test the @@ -1669,7 +1675,7 @@ int tty_release(struct inode *inode, struct file *filp) opens on /dev/tty */ mutex_lock(&tty_mutex); - tty_lock(); + tty_lock_pair(tty, o_tty); tty_closing = tty->count <= 1; o_tty_closing = o_tty && (o_tty->count <= (pty_master ? 1 : 0)); @@ -1700,7 +1706,7 @@ int tty_release(struct inode *inode, struct file *filp) printk(KERN_WARNING "%s: %s: read/write wait queue active!\n", __func__, tty_name(tty, buf)); - tty_unlock(); + tty_unlock_pair(tty, o_tty); mutex_unlock(&tty_mutex); schedule(); } @@ -1763,7 +1769,7 @@ int tty_release(struct inode *inode, struct file *filp) } mutex_unlock(&tty_mutex); - tty_unlock(); + tty_unlock_pair(tty, o_tty); /* At this point the TTY_CLOSING flag should ensure a dead tty cannot be re-opened by a racing opener */ @@ -1780,7 +1786,9 @@ int tty_release(struct inode *inode, struct file *filp) tty_ldisc_release(tty, o_tty); /* * The release_tty function takes care of the details of clearing - * the slots and preserving the termios structure. + * the slots and preserving the termios structure. The tty_unlock_pair + * should be safe as we keep a kref while the tty is locked (so the + * unlock never unlocks a freed tty). */ mutex_lock(&tty_mutex); release_tty(tty, idx); @@ -1789,7 +1797,6 @@ int tty_release(struct inode *inode, struct file *filp) /* Make this pty number available for reallocation */ if (devpts) devpts_kill_index(inode, idx); - return 0; } @@ -1893,6 +1900,9 @@ static struct tty_driver *tty_lookup_driver(dev_t device, struct file *filp, * Locking: tty_mutex protects tty, tty_lookup_driver and tty_init_dev. * tty->count should protect the rest. * ->siglock protects ->signal/->sighand + * + * Note: the tty_unlock/lock cases without a ref are only safe due to + * tty_mutex */ static int tty_open(struct inode *inode, struct file *filp) @@ -1916,8 +1926,7 @@ retry_open: retval = 0; mutex_lock(&tty_mutex); - tty_lock(); - + /* This is protected by the tty_mutex */ tty = tty_open_current_tty(device, filp); if (IS_ERR(tty)) { retval = PTR_ERR(tty); @@ -1938,17 +1947,19 @@ retry_open: } if (tty) { + tty_lock(tty); retval = tty_reopen(tty); - if (retval) + if (retval < 0) { + tty_unlock(tty); tty = ERR_PTR(retval); - } else + } + } else /* Returns with the tty_lock held for now */ tty = tty_init_dev(driver, index); mutex_unlock(&tty_mutex); if (driver) tty_driver_kref_put(driver); if (IS_ERR(tty)) { - tty_unlock(); retval = PTR_ERR(tty); goto err_file; } @@ -1977,7 +1988,7 @@ retry_open: printk(KERN_DEBUG "%s: error %d in opening %s...\n", __func__, retval, tty->name); #endif - tty_unlock(); /* need to call tty_release without BTM */ + tty_unlock(tty); /* need to call tty_release without BTM */ tty_release(inode, filp); if (retval != -ERESTARTSYS) return retval; @@ -1989,17 +2000,15 @@ retry_open: /* * Need to reset f_op in case a hangup happened. */ - tty_lock(); if (filp->f_op == &hung_up_tty_fops) filp->f_op = &tty_fops; - tty_unlock(); goto retry_open; } - tty_unlock(); + tty_unlock(tty); mutex_lock(&tty_mutex); - tty_lock(); + tty_lock(tty); spin_lock_irq(¤t->sighand->siglock); if (!noctty && current->signal->leader && @@ -2007,11 +2016,10 @@ retry_open: tty->session == NULL) __proc_set_tty(current, tty); spin_unlock_irq(¤t->sighand->siglock); - tty_unlock(); + tty_unlock(tty); mutex_unlock(&tty_mutex); return 0; err_unlock: - tty_unlock(); mutex_unlock(&tty_mutex); /* after locks to avoid deadlock */ if (!IS_ERR_OR_NULL(driver)) @@ -2094,10 +2102,13 @@ out: static int tty_fasync(int fd, struct file *filp, int on) { + struct tty_struct *tty = file_tty(filp); int retval; - tty_lock(); + + tty_lock(tty); retval = __tty_fasync(fd, filp, on); - tty_unlock(); + tty_unlock(tty); + return retval; } @@ -2934,6 +2945,7 @@ void initialize_tty_struct(struct tty_struct *tty, tty->pgrp = NULL; tty->overrun_time = jiffies; tty_buffer_init(tty); + mutex_init(&tty->legacy_mutex); mutex_init(&tty->termios_mutex); mutex_init(&tty->ldisc_mutex); init_waitqueue_head(&tty->write_wait); diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index 3d0687197d0..4d7b56268c7 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -568,7 +568,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) if (IS_ERR(new_ldisc)) return PTR_ERR(new_ldisc); - tty_lock(); + tty_lock(tty); /* * We need to look at the tty locking here for pty/tty pairs * when both sides try to change in parallel. @@ -582,12 +582,12 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) */ if (tty->ldisc->ops->num == ldisc) { - tty_unlock(); + tty_unlock(tty); tty_ldisc_put(new_ldisc); return 0; } - tty_unlock(); + tty_unlock(tty); /* * Problem: What do we do if this blocks ? * We could deadlock here @@ -595,7 +595,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) tty_wait_until_sent(tty, 0); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* @@ -605,10 +605,10 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) while (test_bit(TTY_LDISC_CHANGING, &tty->flags)) { mutex_unlock(&tty->ldisc_mutex); - tty_unlock(); + tty_unlock(tty); wait_event(tty_ldisc_wait, test_bit(TTY_LDISC_CHANGING, &tty->flags) == 0); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); } @@ -623,7 +623,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) o_ldisc = tty->ldisc; - tty_unlock(); + tty_unlock(tty); /* * Make sure we don't change while someone holds a * reference to the line discipline. The TTY_LDISC bit @@ -650,7 +650,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) retval = tty_ldisc_wait_idle(tty, 5 * HZ); - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* handle wait idle failure locked */ @@ -665,7 +665,7 @@ int tty_set_ldisc(struct tty_struct *tty, int ldisc) clear_bit(TTY_LDISC_CHANGING, &tty->flags); mutex_unlock(&tty->ldisc_mutex); tty_ldisc_put(new_ldisc); - tty_unlock(); + tty_unlock(tty); return -EIO; } @@ -708,7 +708,7 @@ enable: if (o_work) schedule_work(&o_tty->buf.work); mutex_unlock(&tty->ldisc_mutex); - tty_unlock(); + tty_unlock(tty); return retval; } @@ -816,11 +816,11 @@ void tty_ldisc_hangup(struct tty_struct *tty) * need to wait for another function taking the BTM */ clear_bit(TTY_LDISC, &tty->flags); - tty_unlock(); + tty_unlock(tty); cancel_work_sync(&tty->buf.work); mutex_unlock(&tty->ldisc_mutex); retry: - tty_lock(); + tty_lock(tty); mutex_lock(&tty->ldisc_mutex); /* At this point we have a closed ldisc and we want to @@ -831,7 +831,7 @@ retry: if (atomic_read(&tty->ldisc->users) != 1) { char cur_n[TASK_COMM_LEN], tty_n[64]; long timeout = 3 * HZ; - tty_unlock(); + tty_unlock(tty); while (tty_ldisc_wait_idle(tty, timeout) == -EBUSY) { timeout = MAX_SCHEDULE_TIMEOUT; @@ -894,6 +894,23 @@ int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty) tty_ldisc_enable(tty); return 0; } + +static void tty_ldisc_kill(struct tty_struct *tty) +{ + mutex_lock(&tty->ldisc_mutex); + /* + * Now kill off the ldisc + */ + tty_ldisc_close(tty, tty->ldisc); + tty_ldisc_put(tty->ldisc); + /* Force an oops if we mess this up */ + tty->ldisc = NULL; + + /* Ensure the next open requests the N_TTY ldisc */ + tty_set_termios_ldisc(tty, N_TTY); + mutex_unlock(&tty->ldisc_mutex); +} + /** * tty_ldisc_release - release line discipline * @tty: tty being shut down @@ -912,29 +929,21 @@ void tty_ldisc_release(struct tty_struct *tty, struct tty_struct *o_tty) * race with the set_ldisc code path. */ + tty_lock_pair(tty, o_tty); tty_ldisc_halt(tty); tty_ldisc_flush_works(tty); - tty_lock(); - - mutex_lock(&tty->ldisc_mutex); - /* - * Now kill off the ldisc - */ - tty_ldisc_close(tty, tty->ldisc); - tty_ldisc_put(tty->ldisc); - /* Force an oops if we mess this up */ - tty->ldisc = NULL; - - /* Ensure the next open requests the N_TTY ldisc */ - tty_set_termios_ldisc(tty, N_TTY); - mutex_unlock(&tty->ldisc_mutex); - - tty_unlock(); + if (o_tty) { + tty_ldisc_halt(o_tty); + tty_ldisc_flush_works(o_tty); + } /* This will need doing differently if we need to lock */ - if (o_tty) - tty_ldisc_release(o_tty, NULL); + tty_ldisc_kill(tty); + if (o_tty) + tty_ldisc_kill(o_tty); + + tty_unlock_pair(tty, o_tty); /* And the memory resources remaining (buffers, termios) will be disposed of when the kref hits zero */ } diff --git a/drivers/tty/tty_mutex.c b/drivers/tty/tty_mutex.c index 9ff986c32a2..67feac9e6eb 100644 --- a/drivers/tty/tty_mutex.c +++ b/drivers/tty/tty_mutex.c @@ -4,29 +4,70 @@ #include #include -/* - * The 'big tty mutex' - * - * This mutex is taken and released by tty_lock() and tty_unlock(), - * replacing the older big kernel lock. - * It can no longer be taken recursively, and does not get - * released implicitly while sleeping. - * - * Don't use in new code. - */ -static DEFINE_MUTEX(big_tty_mutex); +/* Legacy tty mutex glue */ + +enum { + TTY_MUTEX_NORMAL, + TTY_MUTEX_NESTED, +}; /* * Getting the big tty mutex. */ -void __lockfunc tty_lock(void) + +static void __lockfunc tty_lock_nested(struct tty_struct *tty, + unsigned int subclass) { - mutex_lock(&big_tty_mutex); + if (tty->magic != TTY_MAGIC) { + printk(KERN_ERR "L Bad %p\n", tty); + WARN_ON(1); + return; + } + tty_kref_get(tty); + mutex_lock_nested(&tty->legacy_mutex, subclass); +} + +void __lockfunc tty_lock(struct tty_struct *tty) +{ + return tty_lock_nested(tty, TTY_MUTEX_NORMAL); } EXPORT_SYMBOL(tty_lock); -void __lockfunc tty_unlock(void) +void __lockfunc tty_unlock(struct tty_struct *tty) { - mutex_unlock(&big_tty_mutex); + if (tty->magic != TTY_MAGIC) { + printk(KERN_ERR "U Bad %p\n", tty); + WARN_ON(1); + return; + } + mutex_unlock(&tty->legacy_mutex); + tty_kref_put(tty); } EXPORT_SYMBOL(tty_unlock); + +/* + * Getting the big tty mutex for a pair of ttys with lock ordering + * On a non pty/tty pair tty2 can be NULL which is just fine. + */ +void __lockfunc tty_lock_pair(struct tty_struct *tty, + struct tty_struct *tty2) +{ + if (tty < tty2) { + tty_lock(tty); + tty_lock_nested(tty2, TTY_MUTEX_NESTED); + } else { + if (tty2 && tty2 != tty) + tty_lock(tty2); + tty_lock_nested(tty, TTY_MUTEX_NESTED); + } +} +EXPORT_SYMBOL(tty_lock_pair); + +void __lockfunc tty_unlock_pair(struct tty_struct *tty, + struct tty_struct *tty2) +{ + tty_unlock(tty); + if (tty2 && tty2 != tty) + tty_unlock(tty2); +} +EXPORT_SYMBOL(tty_unlock_pair); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index edcb827c128..5246763cff0 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -239,7 +239,7 @@ int tty_port_block_til_ready(struct tty_port *port, /* block if port is in the process of being closed */ if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { - wait_event_interruptible_tty(port->close_wait, + wait_event_interruptible_tty(tty, port->close_wait, !(port->flags & ASYNC_CLOSING)); if (port->flags & ASYNC_HUP_NOTIFY) return -EAGAIN; @@ -305,9 +305,9 @@ int tty_port_block_til_ready(struct tty_port *port, retval = -ERESTARTSYS; break; } - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } finish_wait(&port->open_wait, &wait); diff --git a/include/linux/tty.h b/include/linux/tty.h index a39e72325e7..acca24bf06a 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -268,6 +268,7 @@ struct tty_struct { struct mutex ldisc_mutex; struct tty_ldisc *ldisc; + struct mutex legacy_mutex; struct mutex termios_mutex; spinlock_t ctrl_lock; /* Termios values are protected by the termios mutex */ @@ -609,8 +610,12 @@ extern long vt_compat_ioctl(struct tty_struct *tty, /* tty_mutex.c */ /* functions for preparation of BKL removal */ -extern void __lockfunc tty_lock(void) __acquires(tty_lock); -extern void __lockfunc tty_unlock(void) __releases(tty_lock); +extern void __lockfunc tty_lock(struct tty_struct *tty); +extern void __lockfunc tty_unlock(struct tty_struct *tty); +extern void __lockfunc tty_lock_pair(struct tty_struct *tty, + struct tty_struct *tty2); +extern void __lockfunc tty_unlock_pair(struct tty_struct *tty, + struct tty_struct *tty2); /* * this shall be called only from where BTM is held (like close) @@ -625,9 +630,9 @@ extern void __lockfunc tty_unlock(void) __releases(tty_lock); static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, long timeout) { - tty_unlock(); /* tty->ops->close holds the BTM, drop it while waiting */ + tty_unlock(tty); /* tty->ops->close holds the BTM, drop it while waiting */ tty_wait_until_sent(tty, timeout); - tty_lock(); + tty_lock(tty); } /* @@ -642,16 +647,16 @@ static inline void tty_wait_until_sent_from_close(struct tty_struct *tty, * * Do not use in new code. */ -#define wait_event_interruptible_tty(wq, condition) \ +#define wait_event_interruptible_tty(tty, wq, condition) \ ({ \ int __ret = 0; \ if (!(condition)) { \ - __wait_event_interruptible_tty(wq, condition, __ret); \ + __wait_event_interruptible_tty(tty, wq, condition, __ret); \ } \ __ret; \ }) -#define __wait_event_interruptible_tty(wq, condition, ret) \ +#define __wait_event_interruptible_tty(tty, wq, condition, ret) \ do { \ DEFINE_WAIT(__wait); \ \ @@ -660,9 +665,9 @@ do { \ if (condition) \ break; \ if (!signal_pending(current)) { \ - tty_unlock(); \ + tty_unlock(tty); \ schedule(); \ - tty_lock(); \ + tty_lock(tty); \ continue; \ } \ ret = -ERESTARTSYS; \ diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 87ddd051881..b54c86a2e66 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -705,9 +705,9 @@ static int rfcomm_tty_open(struct tty_struct *tty, struct file *filp) break; } - tty_unlock(); + tty_unlock(tty); schedule(); - tty_lock(); + tty_lock(tty); } set_current_state(TASK_RUNNING); remove_wait_queue(&dev->wait, &wait); From 857196e2758f01ec40f93429013963ca5f22cbae Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 26 Jul 2012 19:00:51 +0100 Subject: [PATCH 070/235] ipoctal: make it compile with the termios changes Also fix the silly speed setting bug. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/staging/ipack/devices/ipoctal.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c index fd0e30132ca..394f5deca34 100644 --- a/drivers/staging/ipack/devices/ipoctal.c +++ b/drivers/staging/ipack/devices/ipoctal.c @@ -617,7 +617,7 @@ static void ipoctal_set_termios(struct tty_struct *tty, struct ipoctal *ipoctal = tty->driver_data; speed_t baud; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; /* Disable and reset everything before change the setup */ ipoctal_write_io_reg(ipoctal, &ipoctal->chan_regs[channel].u.w.cr, @@ -643,7 +643,7 @@ static void ipoctal_set_termios(struct tty_struct *tty, default: mr1 |= MR1_CHRL_8_BITS; /* By default, select CS8 */ - tty->termios->c_cflag = (cflag & ~CSIZE) | CS8; + tty->termios.c_cflag = (cflag & ~CSIZE) | CS8; break; } @@ -657,7 +657,7 @@ static void ipoctal_set_termios(struct tty_struct *tty, mr1 |= MR1_PARITY_OFF; /* Mark or space parity is not supported */ - tty->termios->c_cflag &= ~CMSPAR; + tty->termios.c_cflag &= ~CMSPAR; /* Set stop bits */ if (cflag & CSTOPB) @@ -690,10 +690,10 @@ static void ipoctal_set_termios(struct tty_struct *tty, } baud = tty_get_baud_rate(tty); - tty_termios_encode_baud_rate(tty->termios, baud, baud); + tty_termios_encode_baud_rate(&tty->termios, baud, baud); /* Set baud rate */ - switch (tty->termios->c_ospeed) { + switch (baud) { case 75: csr |= TX_CLK_75 | RX_CLK_75; break; @@ -734,7 +734,7 @@ static void ipoctal_set_termios(struct tty_struct *tty, default: csr |= TX_CLK_38400 | RX_CLK_38400; /* In case of default, we establish 38400 bps */ - tty_termios_encode_baud_rate(tty->termios, 38400, 38400); + tty_termios_encode_baud_rate(&tty->termios, 38400, 38400); break; } From 00aaae033e323af33740e7012a8ba4b0fa6dce20 Mon Sep 17 00:00:00 2001 From: Stanislav Kozina Date: Thu, 9 Aug 2012 14:48:58 +0100 Subject: [PATCH 071/235] tty: Fix possible race in n_tty_read() Fix possible panic caused by unlocked access to tty->read_cnt in while-loop condition in n_tty_read(). Signed-off-by: Stanislav Kozina Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_tty.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 101790cea4a..20de673a773 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1838,13 +1838,13 @@ do_it_again: if (tty->icanon && !L_EXTPROC(tty)) { /* N.B. avoid overrun if nr == 0 */ + spin_lock_irqsave(&tty->read_lock, flags); while (nr && tty->read_cnt) { int eol; eol = test_and_clear_bit(tty->read_tail, tty->read_flags); c = tty->read_buf[tty->read_tail]; - spin_lock_irqsave(&tty->read_lock, flags); tty->read_tail = ((tty->read_tail+1) & (N_TTY_BUF_SIZE-1)); tty->read_cnt--; @@ -1862,15 +1862,19 @@ do_it_again: if (tty_put_user(tty, c, b++)) { retval = -EFAULT; b--; + spin_lock_irqsave(&tty->read_lock, flags); break; } nr--; } if (eol) { tty_audit_push(tty); + spin_lock_irqsave(&tty->read_lock, flags); break; } + spin_lock_irqsave(&tty->read_lock, flags); } + spin_unlock_irqrestore(&tty->read_lock, flags); if (retval) break; } else { From 090abf7b91645c1936ba959b1e1cd6d09110779c Mon Sep 17 00:00:00 2001 From: Jaeden Amero Date: Fri, 27 Jul 2012 08:43:11 -0500 Subject: [PATCH 072/235] n_tty: Don't lose characters when PARMRK is enabled When PARMRK is set and large transfers of characters that will get marked are being received, n_tty could drop data silently (i.e. without reporting any error to the client). This is because characters have the potential to take up to three bytes in the line discipline (when they get marked with parity or framing errors), but the amount of free space reported to tty_buffer flush_to_ldisc (via tty->receive_room) is based on the pre-marked data size. With this patch, the n_tty layer will no longer assume that each byte will only take up one byte in the line discipline. Instead, it will make an overly conservative estimate that each byte will take up three bytes in the line discipline when PARMRK is set. Signed-off-by: Jaeden Amero Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_tty.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 20de673a773..6259242b785 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -92,10 +92,18 @@ static inline int tty_put_user(struct tty_struct *tty, unsigned char x, static void n_tty_set_room(struct tty_struct *tty) { - /* tty->read_cnt is not read locked ? */ - int left = N_TTY_BUF_SIZE - tty->read_cnt - 1; + int left; int old_left; + /* tty->read_cnt is not read locked ? */ + if (I_PARMRK(tty)) { + /* Multiply read_cnt by 3, since each byte might take up to + * three times as many spaces when PARMRK is set (depending on + * its flags, e.g. parity error). */ + left = N_TTY_BUF_SIZE - tty->read_cnt * 3 - 1; + } else + left = N_TTY_BUF_SIZE - tty->read_cnt - 1; + /* * If we are doing input canonicalization, and there are no * pending newlines, let characters through without limit, so From 6f9ea7ad7be10dca95e7ca57221c5f81be48d852 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:26 +0200 Subject: [PATCH 073/235] TTY: pty, stop passing NULL to free_tty_struct In case alloc_tty_struct fails in pty_common_install, we pass NULL to free_tty_struct. This is invalid as the function is not ready to cope with that. And even if it was, it is not nice to do that anyway. Signed-off-by: Jiri Slaby Reported-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 4399f1dbd13..d9ea9e2c9ec 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -303,9 +303,11 @@ static int pty_common_install(struct tty_driver *driver, struct tty_struct *tty, int retval = -ENOMEM; o_tty = alloc_tty_struct(); + if (!o_tty) + goto err; ports[0] = kmalloc(sizeof **ports, GFP_KERNEL); ports[1] = kmalloc(sizeof **ports, GFP_KERNEL); - if (!o_tty || !ports[0] || !ports[1]) + if (!ports[0] || !ports[1]) goto err_free_tty; if (!try_module_get(driver->other->owner)) { /* This cannot in fact currently happen */ @@ -360,6 +362,7 @@ err_free_tty: kfree(ports[0]); kfree(ports[1]); free_tty_struct(o_tty); +err: return retval; } From 3dd332c553996eec2593110b05abf8a4819b5c28 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:27 +0200 Subject: [PATCH 074/235] TTY: 68328serial, fix compilation tty_struct->termios is no longer a pointer. This was changed recently by "tty: move the termios object into the tty". But 68328serial was not changed, so we now have a compilation error: 68328serial.c: In function 'change_speed': 68328serial.c:518:22: error: invalid type argument of '->' (have 'struct ktermios') 68328serial.c: In function 'rs_set_ldisc': 68328serial.c:620:31: error: invalid type argument of '->' (have 'struct ktermios') 68328serial.c: In function 'rs_set_termios': 68328serial.c:988:20: error: invalid type argument of '->' (have 'struct ktermios') Fix that now. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/68328serial.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c index 3ed20e435e5..cc4c092fef0 100644 --- a/drivers/tty/serial/68328serial.c +++ b/drivers/tty/serial/68328serial.c @@ -515,7 +515,7 @@ static void change_speed(struct m68k_serial *info, struct tty_struct *tty) unsigned cflag; int i; - cflag = tty->termios->c_cflag; + cflag = tty->termios.c_cflag; if (!(port = info->port)) return; @@ -617,7 +617,7 @@ static void rs_set_ldisc(struct tty_struct *tty) if (serial_paranoia_check(info, tty->name, "rs_set_ldisc")) return; - info->is_cons = (tty->termios->c_line == N_TTY); + info->is_cons = (tty->termios.c_line == N_TTY); printk("ttyS%d console mode %s\n", info->line, info->is_cons ? "on" : "off"); } @@ -985,7 +985,7 @@ static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios) change_speed(info, tty); if ((old_termios->c_cflag & CRTSCTS) && - !(tty->termios->c_cflag & CRTSCTS)) { + !(tty->termios.c_cflag & CRTSCTS)) { tty->hw_stopped = 0; rs_start(tty); } @@ -1070,7 +1070,7 @@ static void rs_close(struct tty_struct *tty, struct file * filp) if (tty->ldisc.close) (tty->ldisc.close)(tty); tty->ldisc = ldiscs[N_TTY]; - tty->termios->c_line = N_TTY; + tty->termios.c_line = N_TTY; if (tty->ldisc.open) (tty->ldisc.open)(tty); } From 86176ed905454e568539c77e0cba5759085830bb Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:28 +0200 Subject: [PATCH 075/235] TTY: n_gsm, use tty_port_install We need to link a port to a tty in install. And since dlci is allocated even in open, we need to create gsmtty_install, allocate dlci there and create also the link. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 30 ++++++++++++++++++++++++------ 1 file changed, 24 insertions(+), 6 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 7a4bf3053a1..3778687f748 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2868,14 +2868,14 @@ static const struct tty_port_operations gsm_port_ops = { .dtr_rts = gsm_dtr_rts, }; - -static int gsmtty_open(struct tty_struct *tty, struct file *filp) +static int gsmtty_install(struct tty_driver *driver, struct tty_struct *tty) { struct gsm_mux *gsm; struct gsm_dlci *dlci; - struct tty_port *port; unsigned int line = tty->index; unsigned int mux = line >> 6; + bool alloc = false; + int ret; line = line & 0x3F; @@ -2890,13 +2890,30 @@ static int gsmtty_open(struct tty_struct *tty, struct file *filp) if (gsm->dead) return -EL2HLT; dlci = gsm->dlci[line]; - if (dlci == NULL) + if (dlci == NULL) { + alloc = true; dlci = gsm_dlci_alloc(gsm, line); + } if (dlci == NULL) return -ENOMEM; - port = &dlci->port; - port->count++; + ret = tty_port_install(&dlci->port, driver, tty); + if (ret) { + if (alloc) + dlci_put(dlci); + return ret; + } + tty->driver_data = dlci; + + return 0; +} + +static int gsmtty_open(struct tty_struct *tty, struct file *filp) +{ + struct gsm_dlci *dlci = tty->driver_data; + struct tty_port *port = &dlci->port; + + port->count++; dlci_get(dlci); dlci_get(dlci->gsm->dlci[0]); mux_get(dlci->gsm); @@ -3085,6 +3102,7 @@ static int gsmtty_break_ctl(struct tty_struct *tty, int state) /* Virtual ttys for the demux */ static const struct tty_operations gsmtty_ops = { + .install = gsmtty_install, .open = gsmtty_open, .close = gsmtty_close, .write = gsmtty_write, From d15684228a1f82555fcd3c5fcd86a0884bad29e3 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:29 +0200 Subject: [PATCH 076/235] misc: pti, add const to pci_device_id table It is annotated as __devinitconst. Despite the annotation is useless in most cases, const keyword is misssing there. So we are placing non-const data into rodata section. Fix that now. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index b7eb545394b..5cb61f7e6f8 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -76,7 +76,7 @@ struct pti_dev { */ static DEFINE_MUTEX(alloclock); -static struct pci_device_id pci_ids[] __devinitconst = { +static const struct pci_device_id pci_ids[] __devinitconst = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x82B)}, {0} }; From c6333cc65d12fddf9cf79de3950b65bc142784e1 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:30 +0200 Subject: [PATCH 077/235] misc: pti, pci drvdata cannot be NULL in ->remove As we set drvdata unconditionally in ->probe, we need not check if it is NULL. Let us remove the check. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 5cb61f7e6f8..88da085e450 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -400,16 +400,13 @@ EXPORT_SYMBOL_GPL(pti_writedata); */ static void __devexit pti_pci_remove(struct pci_dev *pdev) { - struct pti_dev *drv_data; + struct pti_dev *drv_data = pci_get_drvdata(pdev); - drv_data = pci_get_drvdata(pdev); - if (drv_data != NULL) { - pci_iounmap(pdev, drv_data->pti_ioaddr); - pci_set_drvdata(pdev, NULL); - kfree(drv_data); - pci_release_region(pdev, 1); - pci_disable_device(pdev); - } + pci_iounmap(pdev, drv_data->pti_ioaddr); + pci_set_drvdata(pdev, NULL); + kfree(drv_data); + pci_release_region(pdev, 1); + pci_disable_device(pdev); } /* From dda3f32c3a7201ee79e7e6a7b1d827b89759b4bc Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:31 +0200 Subject: [PATCH 078/235] misc: pti, stop using iomap's unmap on ioremap space Ioremap space is different to iomap. ->probe function uses ioremap, but ->remove calls pci_iounmap. That one is illegal. Fix that by using iounmap. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 88da085e450..3bfc8e37cb5 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -402,7 +402,7 @@ static void __devexit pti_pci_remove(struct pci_dev *pdev) { struct pti_dev *drv_data = pci_get_drvdata(pdev); - pci_iounmap(pdev, drv_data->pti_ioaddr); + iounmap(drv_data->pti_ioaddr); pci_set_drvdata(pdev, NULL); kfree(drv_data); pci_release_region(pdev, 1); From 065185f604c604ce77c43d7f26faf712f0bfa265 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:32 +0200 Subject: [PATCH 079/235] misc: pti, move ->remove to the PCI code The function is lost somewhere in the forest. Move it to have it along with probe and other pci_driver stuff. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 3bfc8e37cb5..4a24421136a 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -393,22 +393,6 @@ void pti_writedata(struct pti_masterchannel *mc, u8 *buf, int count) } EXPORT_SYMBOL_GPL(pti_writedata); -/** - * pti_pci_remove()- Driver exit method to remove PTI from - * PCI bus. - * @pdev: variable containing pci info of PTI. - */ -static void __devexit pti_pci_remove(struct pci_dev *pdev) -{ - struct pti_dev *drv_data = pci_get_drvdata(pdev); - - iounmap(drv_data->pti_ioaddr); - pci_set_drvdata(pdev, NULL); - kfree(drv_data); - pci_release_region(pdev, 1); - pci_disable_device(pdev); -} - /* * for the tty_driver_*() basic function descriptions, see tty_driver.h. * Specific header comments made for PTI-related specifics. @@ -881,6 +865,22 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, return retval; } +/** + * pti_pci_remove()- Driver exit method to remove PTI from + * PCI bus. + * @pdev: variable containing pci info of PTI. + */ +static void __devexit pti_pci_remove(struct pci_dev *pdev) +{ + struct pti_dev *drv_data = pci_get_drvdata(pdev); + + iounmap(drv_data->pti_ioaddr); + pci_set_drvdata(pdev, NULL); + kfree(drv_data); + pci_release_region(pdev, 1); + pci_disable_device(pdev); +} + static struct pci_driver pti_pci_driver = { .name = PCINAME, .id_table = pci_ids, From 3140bae26c9105b4ec8ff4935631f2f09882553d Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:33 +0200 Subject: [PATCH 080/235] misc: pti, do the opposite of ->probe in ->remove Currently, probe initializes some parts. Then, some of them are unwound in ->remove, some in module_exit. Let us do the opposite of whole ->probe in ->remove. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 21 +++++++-------------- 1 file changed, 7 insertions(+), 14 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 4a24421136a..be6e6795d79 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -874,11 +874,18 @@ static void __devexit pti_pci_remove(struct pci_dev *pdev) { struct pti_dev *drv_data = pci_get_drvdata(pdev); + unregister_console(&pti_console); + + tty_unregister_device(pti_tty_driver, 0); + tty_unregister_device(pti_tty_driver, 1); + iounmap(drv_data->pti_ioaddr); pci_set_drvdata(pdev, NULL); kfree(drv_data); pci_release_region(pdev, 1); pci_disable_device(pdev); + + misc_deregister(&pti_char_driver); } static struct pci_driver pti_pci_driver = { @@ -959,9 +966,6 @@ static void __exit pti_exit(void) { int retval; - tty_unregister_device(pti_tty_driver, 0); - tty_unregister_device(pti_tty_driver, 1); - retval = tty_unregister_driver(pti_tty_driver); if (retval) { pr_err("%s(%d): TTY unregistration failed of pti driver\n", @@ -971,17 +975,6 @@ static void __exit pti_exit(void) } pci_unregister_driver(&pti_pci_driver); - - retval = misc_deregister(&pti_char_driver); - if (retval) { - pr_err("%s(%d): CHAR unregistration failed of pti driver\n", - __func__, __LINE__); - pr_err("%s(%d): Error value returned: %d\n", - __func__, __LINE__, retval); - } - - unregister_console(&pti_console); - return; } module_init(pti_init); From fbf1c247dac8574ef3973adce4b20d40ff22214e Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:34 +0200 Subject: [PATCH 081/235] misc: pti, fix fail paths Fail paths in ->probe and pti_init are incomplete. Fix that by adding proper clean-up paths. Note that we used to leak tty_driver on module unload. This is fixed here too. tty_unregister_driver needs not retval checking, so remove that. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 53 ++++++++++++++++++++++------------------------ 1 file changed, 25 insertions(+), 28 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index be6e6795d79..90de855abb9 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -811,7 +811,7 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, __func__, __LINE__); pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - return retval; + goto err; } retval = pci_enable_device(pdev); @@ -819,17 +819,16 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "%s: pci_enable_device() returned error %d\n", __func__, retval); - return retval; + goto err_unreg_misc; } drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL); - if (drv_data == NULL) { retval = -ENOMEM; dev_err(&pdev->dev, "%s(%d): kmalloc() returned NULL memory.\n", __func__, __LINE__); - return retval; + goto err_disable_pci; } drv_data->pti_addr = pci_resource_start(pdev, pci_bar); @@ -838,18 +837,15 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, dev_err(&pdev->dev, "%s(%d): pci_request_region() returned error %d\n", __func__, __LINE__, retval); - kfree(drv_data); - return retval; + goto err_free_dd; } drv_data->aperture_base = drv_data->pti_addr+APERTURE_14; drv_data->pti_ioaddr = ioremap_nocache((u32)drv_data->aperture_base, APERTURE_LEN); if (!drv_data->pti_ioaddr) { - pci_release_region(pdev, pci_bar); retval = -ENOMEM; - kfree(drv_data); - return retval; + goto err_rel_reg; } pci_set_drvdata(pdev, drv_data); @@ -862,6 +858,16 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, register_console(&pti_console); + return 0; +err_rel_reg: + pci_release_region(pdev, pci_bar); +err_free_dd: + kfree(drv_data); +err_disable_pci: + pci_disable_device(pdev); +err_unreg_misc: + misc_deregister(&pti_char_driver); +err: return retval; } @@ -937,25 +943,24 @@ static int __init pti_init(void) pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - pti_tty_driver = NULL; - return retval; + goto put_tty; } retval = pci_register_driver(&pti_pci_driver); - if (retval) { pr_err("%s(%d): PCI registration failed of pti driver\n", __func__, __LINE__); pr_err("%s(%d): Error value returned: %d\n", __func__, __LINE__, retval); - - tty_unregister_driver(pti_tty_driver); - pr_err("%s(%d): Unregistering TTY part of pti driver\n", - __func__, __LINE__); - pti_tty_driver = NULL; - return retval; + goto unreg_tty; } + return 0; +unreg_tty: + tty_unregister_driver(pti_tty_driver); +put_tty: + put_tty_driver(pti_tty_driver); + pti_tty_driver = NULL; return retval; } @@ -964,17 +969,9 @@ static int __init pti_init(void) */ static void __exit pti_exit(void) { - int retval; - - retval = tty_unregister_driver(pti_tty_driver); - if (retval) { - pr_err("%s(%d): TTY unregistration failed of pti driver\n", - __func__, __LINE__); - pr_err("%s(%d): Error value returned: %d\n", - __func__, __LINE__, retval); - } - + tty_unregister_driver(pti_tty_driver); pci_unregister_driver(&pti_pci_driver); + put_tty_driver(pti_tty_driver); } module_init(pti_init); From 5bd420009716f3348610fdf9c6307f0db583ba04 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:35 +0200 Subject: [PATCH 082/235] misc: pti, fix tty_port count We now have *one* tty_port for both TTYs. How this was supposed to work? Change it to have a tty_port for each of TTYs. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 17 ++++++++++------- 1 file changed, 10 insertions(+), 7 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index 90de855abb9..fe76f9dca1d 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -60,7 +60,7 @@ struct pti_tty { }; struct pti_dev { - struct tty_port port; + struct tty_port port[PTITTY_MINOR_NUM]; unsigned long pti_addr; unsigned long aperture_base; void __iomem *pti_ioaddr; @@ -427,7 +427,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp) * also removes a locking requirement for the actual write * procedure. */ - return tty_port_open(&drv_data->port, tty, filp); + return tty_port_open(&drv_data->port[tty->index], tty, filp); } /** @@ -443,7 +443,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp) */ static void pti_tty_driver_close(struct tty_struct *tty, struct file *filp) { - tty_port_close(&drv_data->port, tty, filp); + tty_port_close(&drv_data->port[tty->index], tty, filp); } /** @@ -799,6 +799,7 @@ static const struct tty_port_operations tty_port_ops = { static int __devinit pti_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { + unsigned int a; int retval = -EINVAL; int pci_bar = 1; @@ -850,11 +851,13 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, pci_set_drvdata(pdev, drv_data); - tty_port_init(&drv_data->port); - drv_data->port.ops = &tty_port_ops; + for (a = 0; a < PTITTY_MINOR_NUM; a++) { + struct tty_port *port = &drv_data->port[a]; + tty_port_init(port); + port->ops = &tty_port_ops; - tty_register_device(pti_tty_driver, 0, &pdev->dev); - tty_register_device(pti_tty_driver, 1, &pdev->dev); + tty_register_device(pti_tty_driver, a, &pdev->dev); + } register_console(&pti_console); From c565ee07708e19474cd1133bf50289a36b5bcc26 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:36 +0200 Subject: [PATCH 083/235] misc: pti, use tty_port_register_device So now we have enough of tty_ports, so we can signal the TTY layer to use them by tty_port_register_device. The upside is that we look like we can introduce tty_port_easy_open and put it directly as tty_operations->open to drivers doing nothing in open and using tty_port_register_device. Because the easy open can obtain a tty_port rather easily from a tty now. Heh, what a nice by-product. Signed-off-by: Jiri Slaby Cc: J Freyensee Signed-off-by: Greg Kroah-Hartman --- drivers/misc/pti.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/misc/pti.c b/drivers/misc/pti.c index fe76f9dca1d..4999b34b7a6 100644 --- a/drivers/misc/pti.c +++ b/drivers/misc/pti.c @@ -427,7 +427,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp) * also removes a locking requirement for the actual write * procedure. */ - return tty_port_open(&drv_data->port[tty->index], tty, filp); + return tty_port_open(tty->port, tty, filp); } /** @@ -443,7 +443,7 @@ static int pti_tty_driver_open(struct tty_struct *tty, struct file *filp) */ static void pti_tty_driver_close(struct tty_struct *tty, struct file *filp) { - tty_port_close(&drv_data->port[tty->index], tty, filp); + tty_port_close(tty->port, tty, filp); } /** @@ -856,7 +856,7 @@ static int __devinit pti_pci_probe(struct pci_dev *pdev, tty_port_init(port); port->ops = &tty_port_ops; - tty_register_device(pti_tty_driver, a, &pdev->dev); + tty_port_register_device(port, pti_tty_driver, a, &pdev->dev); } register_console(&pti_console); From 38daf88ae16d053cffc8745e05b9f7a324ce36eb Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:37 +0200 Subject: [PATCH 084/235] mxser: allow overlapping vector For many cards, this saves some IO space because interrupt status port has precedence over the rest of ports on the card. Hence it can be mapped to a hole in I/O ports. Here we add a kernel parameter which allows that if a user wants to. But they need to explicitly enable it by a module parameter. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/mxser.c | 35 +++++++++++++++++++++++++++++++---- 1 file changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index c162ee93116..e64fe40618c 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -2337,11 +2337,36 @@ static struct tty_port_operations mxser_port_ops = { * The MOXA Smartio/Industio serial driver boot-time initialization code! */ +static bool allow_overlapping_vector; +module_param(allow_overlapping_vector, bool, 444); +MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)"); + +static bool mxser_overlapping_vector(struct mxser_board *brd) +{ + return allow_overlapping_vector && + brd->vector >= brd->ports[0].ioaddr && + brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports; +} + +static int mxser_request_vector(struct mxser_board *brd) +{ + if (mxser_overlapping_vector(brd)) + return 0; + return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO; +} + +static void mxser_release_vector(struct mxser_board *brd) +{ + if (mxser_overlapping_vector(brd)) + return; + release_region(brd->vector, 1); +} + static void mxser_release_ISA_res(struct mxser_board *brd) { free_irq(brd->irq, brd); release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); - release_region(brd->vector, 1); + mxser_release_vector(brd); } static int __devinit mxser_initbrd(struct mxser_board *brd, @@ -2396,7 +2421,7 @@ static int __devinit mxser_initbrd(struct mxser_board *brd, static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) { - int id, i, bits; + int id, i, bits, ret; unsigned short regs[16], irq; unsigned char scratch, scratch2; @@ -2492,13 +2517,15 @@ static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) 8 * brd->info->nports - 1); return -EIO; } - if (!request_region(brd->vector, 1, "mxser(vector)")) { + + ret = mxser_request_vector(brd); + if (ret) { release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); printk(KERN_ERR "mxser: can't request interrupt vector region: " "0x%.8lx-0x%.8lx\n", brd->ports[0].ioaddr, brd->ports[0].ioaddr + 8 * brd->info->nports - 1); - return -EIO; + return ret; } return brd->info->nports; From f06fb543c1d0cbd721250b72ee1244178a38aa9d Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:38 +0200 Subject: [PATCH 085/235] TTY: ttyprintk, unregister tty driver on failure When the tty_printk driver fails to create a node in sysfs, the system crashes. It is because the driver registers a tty driver and frees it without deregistering it first. The fix is easy: add a call to tty_unregister_driver to the fail path. This is very unlikely to happen in usual environment => no need for stable. The crash occurs at some place where we iterate over tty drivers first. It may look like this: BUG: unable to handle kernel paging request at ffffffffffffff84 IP: [] tty_open+0xd6/0x650 PGD 1a0d067 PUD 1a0e067 PMD 0 Oops: 0000 [#1] PREEMPT SMP Modules linked in: CPU 0 Pid: 1183, comm: boot.localnet Tainted: G W 3.5.0-rc7-next-20120716+ #369 Bochs Bochs RIP: 0010:[] [] tty_open+0xd6/0x650 RSP: 0018:ffff8800162b3b98 EFLAGS: 00010207 RAX: 0000000000000000 RBX: ffff880016ba6200 RCX: 0000000000002208 RDX: 0000000000000000 RSI: 00000000000000d0 RDI: ffffffff81a35080 RBP: ffff8800162b3c08 R08: ffffffff81276f42 R09: 0000000000400040 R10: ffff8800161dc005 R11: ffff8800188ee048 R12: 0000000000000000 R13: ffffffffffffff58 R14: 0000000000400040 R15: 0000000000008000 FS: 00007f3684abd700(0000) GS:ffff880018e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffff84 CR3: 000000001503e000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process boot.localnet (pid: 1183, threadinfo ffff8800162b2000, task ffff8800188c5880) Stack: ffff8800162b3c08 ffffffff81363d63 ffffffff81a62940 ffff8800189b4e88 ffff8800188c5880 ffffffff81123180 0000000000000000 ffffffff18b20600 0000000000000000 ffff8800189b4e88 ffff880016ba6200 ffff880018b20600 Call Trace: [] ? kobj_lookup+0x103/0x160 [] ? mount_fs+0x110/0x110 [] chrdev_open+0x9c/0x1a0 [] ? cdev_put+0x30/0x30 [] do_dentry_open.isra.19+0x1e6/0x270 [] finish_open+0x65/0xa0 [] do_last.isra.52+0x26e/0xd80 [] ? inode_permission+0x13/0x50 [] ? link_path_walk+0x63/0x940 [] path_openat+0xab/0x3d0 [] do_filp_open+0x3d/0xa0 [] ? alloc_fd+0xd2/0x120 [] do_sys_open+0xf3/0x1d0 [] sys_open+0x1c/0x20 [] system_call_fastpath+0x16/0x1b Signed-off-by: Jiri Slaby Cc: Samo Pogacnik Signed-off-by: Greg Kroah-Hartman --- drivers/char/ttyprintk.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 46b77ede84c..9b1e5e0cdc6 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -217,6 +217,7 @@ static int __init ttyprintk_init(void) return 0; error: + tty_unregister_driver(ttyprintk_driver); put_tty_driver(ttyprintk_driver); ttyprintk_driver = NULL; return ret; From ee8b593affdf893012e57f4c54a21984d1b0d92e Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:39 +0200 Subject: [PATCH 086/235] TTY: ttyprintk, don't touch behind tty->write_buf If a user provides a buffer larger than a tty->write_buf chunk and passes '\r' at the end of the buffer, we touch an out-of-bound memory. Add a check there to prevent this. Signed-off-by: Jiri Slaby Cc: stable@vger.kernel.org (everything maintained past v2.6.37) Cc: Samo Pogacnik Signed-off-by: Greg Kroah-Hartman --- drivers/char/ttyprintk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 9b1e5e0cdc6..08755c52fc5 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -67,7 +67,7 @@ static int tpk_printk(const unsigned char *buf, int count) tmp[tpk_curr + 1] = '\0'; printk(KERN_INFO "%s%s", tpk_tag, tmp); tpk_curr = 0; - if (buf[i + 1] == '\n') + if ((i + 1) < count && buf[i + 1] == '\n') i++; break; case '\n': From 536a3440a27f8687090bdf33468b003bc0f810cf Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:40 +0200 Subject: [PATCH 087/235] TTY: ttyprintk, initialize tty_port earlier After tty_register_driver is called, it is too late to initialize a guy with which we operate in open. When a process already called open(2) on that node, the structures may be in use uninitialized. Move the initialization prior to tty_register_driver. Signed-off-by: Jiri Slaby Cc: Samo Pogacnik Signed-off-by: Greg Kroah-Hartman --- drivers/char/ttyprintk.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 08755c52fc5..be1c3fb186c 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -180,6 +180,10 @@ static int __init ttyprintk_init(void) int ret = -ENOMEM; void *rp; + tty_port_init(&tpk_port.port); + tpk_port.port.ops = &null_ops; + mutex_init(&tpk_port.port_write_mutex); + ttyprintk_driver = alloc_tty_driver(1); if (!ttyprintk_driver) return ret; @@ -210,10 +214,6 @@ static int __init ttyprintk_init(void) goto error; } - tty_port_init(&tpk_port.port); - tpk_port.port.ops = &null_ops; - mutex_init(&tpk_port.port_write_mutex); - return 0; error: From 2312e4f3b2f17cac2cf257c759ad48eb80fdf230 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:41 +0200 Subject: [PATCH 088/235] TTY: tty3270, free tty driver properly On module unload, in tty3270_exit, we forgot to free the tty driver. Add there a call to put_tty_driver. Signed-off-by: Jiri Slaby Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/tty3270.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 1928f3458d1..215037c745c 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -1800,6 +1800,7 @@ tty3270_exit(void) driver = tty3270_driver; tty3270_driver = NULL; tty_unregister_driver(driver); + put_tty_driver(driver); tty3270_del_views(); } From 7f0bc6a68ed93f3b4ad77b94df5ef32446c583e3 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:42 +0200 Subject: [PATCH 089/235] TTY: pass flags to alloc_tty_driver We need to allow drivers that use neither tty_port_install nor tty_port_register_device to link a tty_port to a tty somehow. To avoid a race with open, this has to be performed before tty_register_device. But currently tty_driver->ports is allocated even in tty_register_device because we do not know whether this is the PTY driver. The PTY driver is special here due to an excessive count of lines it declares to handle. We cannot handle tty_ports there this way. To circumvent this, we start passing tty_driver flags to alloc_tty_driver already and we create tty_alloc_driver for this purpose. There we can allocate tty_driver->ports and do all the magic between tty_alloc_driver and tty_register_device. Later we will introduce tty_port_link_device function for that purpose. All drivers should eventually switch to this new tty driver allocation interface. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 34 +++++++++++++++++++++++++--------- include/linux/tty_driver.h | 23 +++++++++++++++++++---- 2 files changed, 44 insertions(+), 13 deletions(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 690224483fa..098a7c72b64 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3061,21 +3061,37 @@ void tty_unregister_device(struct tty_driver *driver, unsigned index) } EXPORT_SYMBOL(tty_unregister_device); -struct tty_driver *__alloc_tty_driver(int lines, struct module *owner) +/** + * __tty_alloc_driver -- allocate tty driver + * @lines: count of lines this driver can handle at most + * @owner: module which is repsonsible for this driver + * @flags: some of TTY_DRIVER_* flags, will be set in driver->flags + * + * This should not be called directly, some of the provided macros should be + * used instead. Use IS_ERR and friends on @retval. + */ +struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, + unsigned long flags) { struct tty_driver *driver; + if (!lines) + return ERR_PTR(-EINVAL); + driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL); - if (driver) { - kref_init(&driver->kref); - driver->magic = TTY_DRIVER_MAGIC; - driver->num = lines; - driver->owner = owner; - /* later we'll move allocation of tables here */ - } + if (!driver) + return ERR_PTR(-ENOMEM); + + kref_init(&driver->kref); + driver->magic = TTY_DRIVER_MAGIC; + driver->num = lines; + driver->owner = owner; + driver->flags = flags; + /* later we'll move allocation of tables here */ + return driver; } -EXPORT_SYMBOL(__alloc_tty_driver); +EXPORT_SYMBOL(__tty_alloc_driver); static void destruct_tty_driver(struct kref *kref) { diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 80e72dc564a..3adc362f0bd 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -296,11 +296,11 @@ struct tty_driver { int name_base; /* offset of printed name */ int major; /* major device number */ int minor_start; /* start of minor device number */ - int num; /* number of devices allocated */ + unsigned int num; /* number of devices allocated */ short type; /* type of tty driver */ short subtype; /* subtype of tty driver */ struct ktermios init_termios; /* Initial termios */ - int flags; /* tty driver flags */ + unsigned long flags; /* tty driver flags */ struct proc_dir_entry *proc_entry; /* /proc fs entry */ struct tty_driver *other; /* only used for the PTY driver */ @@ -322,7 +322,8 @@ struct tty_driver { extern struct list_head tty_drivers; -extern struct tty_driver *__alloc_tty_driver(int lines, struct module *owner); +extern struct tty_driver *__tty_alloc_driver(unsigned int lines, + struct module *owner, unsigned long flags); extern void put_tty_driver(struct tty_driver *driver); extern void tty_set_operations(struct tty_driver *driver, const struct tty_operations *op); @@ -330,7 +331,21 @@ extern struct tty_driver *tty_find_polling_driver(char *name, int *line); extern void tty_driver_kref_put(struct tty_driver *driver); -#define alloc_tty_driver(lines) __alloc_tty_driver(lines, THIS_MODULE) +/* Use TTY_DRIVER_* flags below */ +#define tty_alloc_driver(lines, flags) \ + __tty_alloc_driver(lines, THIS_MODULE, flags) + +/* + * DEPRECATED Do not use this in new code, use tty_alloc_driver instead. + * (And change the return value checks.) + */ +static inline struct tty_driver *alloc_tty_driver(unsigned int lines) +{ + struct tty_driver *ret = tty_alloc_driver(lines, 0); + if (IS_ERR(ret)) + return NULL; + return ret; +} static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) { From 21aca2fa00259f781d228496631b61dbb4274e90 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 8 Aug 2012 22:26:41 +0200 Subject: [PATCH 090/235] TTY: pty, switch to tty_alloc_driver Switch to the new driver allocation interface, as this is one of the special call-sites. Here, we need TTY_DRIVER_DYNAMIC_ALLOC to not allocate tty_driver->ports, cdevs and potentially other structures because we reserve too many lines in pty. Instead, it provides the tty_port<->tty_struct link in tty->ops->install already. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 31 ++++++++++++++++++++----------- include/linux/tty_driver.h | 4 ++++ 2 files changed, 24 insertions(+), 11 deletions(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index d9ea9e2c9ec..f5a27c66ff6 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -444,11 +444,17 @@ static void __init legacy_pty_init(void) if (legacy_count <= 0) return; - pty_driver = alloc_tty_driver(legacy_count); + pty_driver = tty_alloc_driver(legacy_count, + TTY_DRIVER_RESET_TERMIOS | + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_ALLOC); if (!pty_driver) panic("Couldn't allocate pty driver"); - pty_slave_driver = alloc_tty_driver(legacy_count); + pty_slave_driver = tty_alloc_driver(legacy_count, + TTY_DRIVER_RESET_TERMIOS | + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_ALLOC); if (!pty_slave_driver) panic("Couldn't allocate pty slave driver"); @@ -465,7 +471,6 @@ static void __init legacy_pty_init(void) pty_driver->init_termios.c_lflag = 0; pty_driver->init_termios.c_ispeed = 38400; pty_driver->init_termios.c_ospeed = 38400; - pty_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW; pty_driver->other = pty_slave_driver; tty_set_operations(pty_driver, &master_pty_ops_bsd); @@ -479,8 +484,6 @@ static void __init legacy_pty_init(void) pty_slave_driver->init_termios.c_cflag = B38400 | CS8 | CREAD; pty_slave_driver->init_termios.c_ispeed = 38400; pty_slave_driver->init_termios.c_ospeed = 38400; - pty_slave_driver->flags = TTY_DRIVER_RESET_TERMIOS | - TTY_DRIVER_REAL_RAW; pty_slave_driver->other = pty_driver; tty_set_operations(pty_slave_driver, &slave_pty_ops_bsd); @@ -673,10 +676,20 @@ static struct file_operations ptmx_fops; static void __init unix98_pty_init(void) { - ptm_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX); + ptm_driver = tty_alloc_driver(NR_UNIX98_PTY_MAX, + TTY_DRIVER_RESET_TERMIOS | + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_DEVPTS_MEM | + TTY_DRIVER_DYNAMIC_ALLOC); if (!ptm_driver) panic("Couldn't allocate Unix98 ptm driver"); - pts_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX); + pts_driver = tty_alloc_driver(NR_UNIX98_PTY_MAX, + TTY_DRIVER_RESET_TERMIOS | + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_DEVPTS_MEM | + TTY_DRIVER_DYNAMIC_ALLOC); if (!pts_driver) panic("Couldn't allocate Unix98 pts driver"); @@ -693,8 +706,6 @@ static void __init unix98_pty_init(void) ptm_driver->init_termios.c_lflag = 0; ptm_driver->init_termios.c_ispeed = 38400; ptm_driver->init_termios.c_ospeed = 38400; - ptm_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | - TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM; ptm_driver->other = pts_driver; tty_set_operations(ptm_driver, &ptm_unix98_ops); @@ -708,8 +719,6 @@ static void __init unix98_pty_init(void) pts_driver->init_termios.c_cflag = B38400 | CS8 | CREAD; pts_driver->init_termios.c_ispeed = 38400; pts_driver->init_termios.c_ospeed = 38400; - pts_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | - TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM; pts_driver->other = ptm_driver; tty_set_operations(pts_driver, &pty_unix98_ops); diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 3adc362f0bd..1a85f003d64 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -391,6 +391,9 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) * the requested timeout to the caller instead of using a simple * on/off interface. * + * TTY_DRIVER_DYNAMIC_ALLOC -- do not allocate structures which are + * needed per line for this driver as it would waste memory. + * The driver will take care. */ #define TTY_DRIVER_INSTALLED 0x0001 #define TTY_DRIVER_RESET_TERMIOS 0x0002 @@ -398,6 +401,7 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) #define TTY_DRIVER_DYNAMIC_DEV 0x0008 #define TTY_DRIVER_DEVPTS_MEM 0x0010 #define TTY_DRIVER_HARDWARE_BREAK 0x0020 +#define TTY_DRIVER_DYNAMIC_ALLOC 0x0040 /* tty driver types */ #define TTY_DRIVER_TYPE_SYSTEM 0x0001 From 16a02081baa15becdb7d6460659e7832e6524d93 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 8 Aug 2012 22:26:42 +0200 Subject: [PATCH 091/235] TTY: move allocations to tty_alloc_driver So now, that we have flags and know everything needed, keep a promise and move all the tables and ports allocation from tty_register_driver to tty_alloc_driver. Not only that it makes sense, but we need this for tty_port_link_device which needs tty_driver->ports but is to be called before tty_register_driver. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 73 ++++++++++++++++++++------------------------ 1 file changed, 33 insertions(+), 40 deletions(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 098a7c72b64..a67609b9f21 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3074,6 +3074,7 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, unsigned long flags) { struct tty_driver *driver; + int err; if (!lines) return ERR_PTR(-EINVAL); @@ -3087,9 +3088,34 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, driver->num = lines; driver->owner = owner; driver->flags = flags; - /* later we'll move allocation of tables here */ + + if (!(flags & TTY_DRIVER_DEVPTS_MEM)) { + driver->ttys = kcalloc(lines, sizeof(*driver->ttys), + GFP_KERNEL); + driver->termios = kcalloc(lines, sizeof(*driver->termios), + GFP_KERNEL); + if (!driver->ttys || !driver->termios) { + err = -ENOMEM; + goto err_free_all; + } + } + + if (!(flags & TTY_DRIVER_DYNAMIC_ALLOC)) { + driver->ports = kcalloc(lines, sizeof(*driver->ports), + GFP_KERNEL); + if (!driver->ports) { + err = -ENOMEM; + goto err_free_all; + } + } return driver; +err_free_all: + kfree(driver->ports); + kfree(driver->ttys); + kfree(driver->termios); + kfree(driver); + return ERR_PTR(err); } EXPORT_SYMBOL(__tty_alloc_driver); @@ -3098,7 +3124,6 @@ static void destruct_tty_driver(struct kref *kref) struct tty_driver *driver = container_of(kref, struct tty_driver, kref); int i; struct ktermios *tp; - void *p; if (driver->flags & TTY_DRIVER_INSTALLED) { /* @@ -3115,14 +3140,12 @@ static void destruct_tty_driver(struct kref *kref) if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV)) tty_unregister_device(driver, i); } - p = driver->ttys; proc_tty_unregister_driver(driver); - driver->ttys = NULL; - driver->termios = NULL; - kfree(p); cdev_del(&driver->cdev); } kfree(driver->ports); + kfree(driver->termios); + kfree(driver->ttys); kfree(driver); } @@ -3153,27 +3176,8 @@ int tty_register_driver(struct tty_driver *driver) int error; int i; dev_t dev; - void **p = NULL; struct device *d; - if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM) && driver->num) { - p = kzalloc(driver->num * 2 * sizeof(void *), GFP_KERNEL); - if (!p) - return -ENOMEM; - } - /* - * There is too many lines in PTY and we won't need the array there - * since it has an ->install hook where it assigns ports properly. - */ - if (driver->type != TTY_DRIVER_TYPE_PTY) { - driver->ports = kcalloc(driver->num, sizeof(struct tty_port *), - GFP_KERNEL); - if (!driver->ports) { - error = -ENOMEM; - goto err_free_p; - } - } - if (!driver->major) { error = alloc_chrdev_region(&dev, driver->minor_start, driver->num, driver->name); @@ -3186,15 +3190,7 @@ int tty_register_driver(struct tty_driver *driver) error = register_chrdev_region(dev, driver->num, driver->name); } if (error < 0) - goto err_free_p; - - if (p) { - driver->ttys = (struct tty_struct **)p; - driver->termios = (struct ktermios **)(p + driver->num); - } else { - driver->ttys = NULL; - driver->termios = NULL; - } + goto err; cdev_init(&driver->cdev, &tty_fops); driver->cdev.owner = driver->owner; @@ -3211,7 +3207,7 @@ int tty_register_driver(struct tty_driver *driver) d = tty_register_device(driver, i, NULL); if (IS_ERR(d)) { error = PTR_ERR(d); - goto err; + goto err_unreg_devs; } } } @@ -3219,7 +3215,7 @@ int tty_register_driver(struct tty_driver *driver) driver->flags |= TTY_DRIVER_INSTALLED; return 0; -err: +err_unreg_devs: for (i--; i >= 0; i--) tty_unregister_device(driver, i); @@ -3229,10 +3225,7 @@ err: err_unreg_char: unregister_chrdev_region(dev, driver->num); - driver->ttys = NULL; - driver->termios = NULL; -err_free_p: /* destruct_tty_driver will free driver->ports */ - kfree(p); +err: return error; } EXPORT_SYMBOL(tty_register_driver); From 0019b4089ccef8148d8be83cc8adfc81a75b47d4 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 8 Aug 2012 22:26:43 +0200 Subject: [PATCH 092/235] TTY: add support for unnumbered device nodes This allows drivers like ttyprintk to avoid hacks to create an unnumbered node in /dev. It used to set TTY_DRIVER_DYNAMIC_DEV in flags and call device_create on its own. That is incorrect, because TTY_DRIVER_DYNAMIC_DEV may be set only if tty_register_device is called explicitly. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/ttyprintk.c | 17 ++++------------- drivers/tty/tty_io.c | 7 +++++-- include/linux/tty_driver.h | 6 ++++++ 3 files changed, 15 insertions(+), 15 deletions(-) diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index be1c3fb186c..9e6272f0b98 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -178,13 +178,15 @@ static struct tty_driver *ttyprintk_driver; static int __init ttyprintk_init(void) { int ret = -ENOMEM; - void *rp; tty_port_init(&tpk_port.port); tpk_port.port.ops = &null_ops; mutex_init(&tpk_port.port_write_mutex); - ttyprintk_driver = alloc_tty_driver(1); + ttyprintk_driver = tty_alloc_driver(1, + TTY_DRIVER_RESET_TERMIOS | + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_UNNUMBERED_NODE); if (!ttyprintk_driver) return ret; @@ -195,8 +197,6 @@ static int __init ttyprintk_init(void) ttyprintk_driver->type = TTY_DRIVER_TYPE_CONSOLE; ttyprintk_driver->init_termios = tty_std_termios; ttyprintk_driver->init_termios.c_oflag = OPOST | OCRNL | ONOCR | ONLRET; - ttyprintk_driver->flags = TTY_DRIVER_RESET_TERMIOS | - TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; tty_set_operations(ttyprintk_driver, &ttyprintk_ops); ret = tty_register_driver(ttyprintk_driver); @@ -205,15 +205,6 @@ static int __init ttyprintk_init(void) goto error; } - /* create our unnumbered device */ - rp = device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 3), NULL, - ttyprintk_driver->name); - if (IS_ERR(rp)) { - printk(KERN_ERR "Couldn't create ttyprintk device\n"); - ret = PTR_ERR(rp); - goto error; - } - return 0; error: diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index a67609b9f21..4d9898c2b64 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1216,7 +1216,10 @@ static void pty_line_name(struct tty_driver *driver, int index, char *p) */ static void tty_line_name(struct tty_driver *driver, int index, char *p) { - sprintf(p, "%s%d", driver->name, index + driver->name_base); + if (driver->flags & TTY_DRIVER_UNNUMBERED_NODE) + strcpy(p, driver->name); + else + sprintf(p, "%s%d", driver->name, index + driver->name_base); } /** @@ -3076,7 +3079,7 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, struct tty_driver *driver; int err; - if (!lines) + if (!lines || (flags & TTY_DRIVER_UNNUMBERED_NODE && lines > 1)) return ERR_PTR(-EINVAL); driver = kzalloc(sizeof(struct tty_driver), GFP_KERNEL); diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 1a85f003d64..44e05b75d57 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -394,6 +394,11 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) * TTY_DRIVER_DYNAMIC_ALLOC -- do not allocate structures which are * needed per line for this driver as it would waste memory. * The driver will take care. + * + * TTY_DRIVER_UNNUMBERED_NODE -- do not create numbered /dev nodes. In + * other words create /dev/ttyprintk and not /dev/ttyprintk0. + * Applicable only when a driver for a single tty device is + * being allocated. */ #define TTY_DRIVER_INSTALLED 0x0001 #define TTY_DRIVER_RESET_TERMIOS 0x0002 @@ -402,6 +407,7 @@ static inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d) #define TTY_DRIVER_DEVPTS_MEM 0x0010 #define TTY_DRIVER_HARDWARE_BREAK 0x0020 #define TTY_DRIVER_DYNAMIC_ALLOC 0x0040 +#define TTY_DRIVER_UNNUMBERED_NODE 0x0080 /* tty driver types */ #define TTY_DRIVER_TYPE_SYSTEM 0x0001 From 7e73eca6a7b2967423902a4543821bb97cbbe698 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Wed, 8 Aug 2012 22:26:44 +0200 Subject: [PATCH 093/235] TTY: move cdev_add to tty_register_device We need the /dev/ node not to be available before we call tty_register_device. Otherwise we might race with open and tty_struct->port might not be available at that time. This is not an issue now, but would be a problem after "TTY: use tty_port_register_device" is applied. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 48 ++++++++++++++++++++++++++++++++------ include/linux/tty_driver.h | 2 +- 2 files changed, 42 insertions(+), 8 deletions(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 4d9898c2b64..28c3e869ebb 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3006,6 +3006,15 @@ EXPORT_SYMBOL_GPL(tty_put_char); struct class *tty_class; +static int tty_cdev_add(struct tty_driver *driver, dev_t dev, + unsigned int index, unsigned int count) +{ + /* init here, since reused cdevs cause crashes */ + cdev_init(&driver->cdevs[index], &tty_fops); + driver->cdevs[index].owner = driver->owner; + return cdev_add(&driver->cdevs[index], dev, count); +} + /** * tty_register_device - register a tty device * @driver: the tty driver that describes the tty device @@ -3028,8 +3037,10 @@ struct class *tty_class; struct device *tty_register_device(struct tty_driver *driver, unsigned index, struct device *device) { + struct device *ret; char name[64]; dev_t dev = MKDEV(driver->major, driver->minor_start) + index; + bool cdev = false; if (index >= driver->num) { printk(KERN_ERR "Attempt to register invalid tty line number " @@ -3042,7 +3053,18 @@ struct device *tty_register_device(struct tty_driver *driver, unsigned index, else tty_line_name(driver, index, name); - return device_create(tty_class, device, dev, NULL, name); + if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) { + int error = tty_cdev_add(driver, dev, index, 1); + if (error) + return ERR_PTR(error); + cdev = true; + } + + ret = device_create(tty_class, device, dev, NULL, name); + if (IS_ERR(ret) && cdev) + cdev_del(&driver->cdevs[index]); + + return ret; } EXPORT_SYMBOL(tty_register_device); @@ -3061,6 +3083,8 @@ void tty_unregister_device(struct tty_driver *driver, unsigned index) { device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index); + if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) + cdev_del(&driver->cdevs[index]); } EXPORT_SYMBOL(tty_unregister_device); @@ -3077,6 +3101,7 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, unsigned long flags) { struct tty_driver *driver; + unsigned int cdevs = 1; int err; if (!lines || (flags & TTY_DRIVER_UNNUMBERED_NODE && lines > 1)) @@ -3110,6 +3135,13 @@ struct tty_driver *__tty_alloc_driver(unsigned int lines, struct module *owner, err = -ENOMEM; goto err_free_all; } + cdevs = lines; + } + + driver->cdevs = kcalloc(cdevs, sizeof(*driver->cdevs), GFP_KERNEL); + if (!driver->cdevs) { + err = -ENOMEM; + goto err_free_all; } return driver; @@ -3144,8 +3176,10 @@ static void destruct_tty_driver(struct kref *kref) tty_unregister_device(driver, i); } proc_tty_unregister_driver(driver); - cdev_del(&driver->cdev); + if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) + cdev_del(&driver->cdevs[0]); } + kfree(driver->cdevs); kfree(driver->ports); kfree(driver->termios); kfree(driver->ttys); @@ -3195,11 +3229,11 @@ int tty_register_driver(struct tty_driver *driver) if (error < 0) goto err; - cdev_init(&driver->cdev, &tty_fops); - driver->cdev.owner = driver->owner; - error = cdev_add(&driver->cdev, dev, driver->num); - if (error) - goto err_unreg_char; + if (driver->flags & TTY_DRIVER_DYNAMIC_ALLOC) { + error = tty_cdev_add(driver, dev, 0, driver->num); + if (error) + goto err_unreg_char; + } mutex_lock(&tty_mutex); list_add(&driver->tty_drivers, &tty_drivers); diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h index 44e05b75d57..dd976cfb613 100644 --- a/include/linux/tty_driver.h +++ b/include/linux/tty_driver.h @@ -289,7 +289,7 @@ struct tty_operations { struct tty_driver { int magic; /* magic number for this structure */ struct kref kref; /* Reference management */ - struct cdev cdev; + struct cdev *cdevs; struct module *owner; const char *driver_name; const char *name; From 734cc1783816ae358cef45673a29bf7af974e147 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:47 +0200 Subject: [PATCH 094/235] TTY: use tty_port_register_device Currently we have no way to assign tty->port while performing tty installation. There are two ways to provide the link tty_struct => tty_port. Either by calling tty_port_install from tty->ops->install or tty_port_register_device called instead of tty_register_device when the device is being set up after connected. In this patch we modify most of the drivers to do the latter. When the drivers use tty_register_device and we have tty_port already, we switch to tty_port_register_device. So we have the tty_struct => tty_port link for free for those. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- arch/um/drivers/line.c | 3 ++- drivers/isdn/capi/capi.c | 3 ++- drivers/isdn/gigaset/interface.c | 3 ++- drivers/mmc/card/sdio_uart.c | 4 ++-- drivers/net/usb/hso.c | 7 ++++--- drivers/staging/ipack/devices/ipoctal.c | 2 +- drivers/tty/cyclades.c | 16 +++++++++------- drivers/tty/ehv_bytechan.c | 9 +++++---- drivers/tty/ipwireless/tty.c | 2 +- drivers/tty/isicom.c | 3 ++- drivers/tty/mxser.c | 6 ++++-- drivers/tty/nozomi.c | 4 ++-- drivers/tty/rocket.c | 4 ++-- drivers/tty/serial/ifx6x60.c | 4 ++-- drivers/tty/serial/msm_smd_tty.c | 8 +++++--- drivers/tty/serial/serial_core.c | 3 ++- drivers/tty/synclink_gt.c | 7 +++++-- drivers/usb/class/cdc-acm.c | 3 ++- drivers/usb/gadget/u_serial.c | 3 ++- net/bluetooth/rfcomm/tty.c | 4 ++-- 20 files changed, 58 insertions(+), 40 deletions(-) diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c index bbaf2c59830..457475f9841 100644 --- a/arch/um/drivers/line.c +++ b/arch/um/drivers/line.c @@ -409,7 +409,8 @@ int setup_one_line(struct line *lines, int n, char *init, line->valid = 1; err = parse_chan_pair(new, line, n, opts, error_out); if (!err) { - struct device *d = tty_register_device(driver, n, NULL); + struct device *d = tty_port_register_device(&line->port, + driver, n, NULL); if (IS_ERR(d)) { *error_out = "Failed to register device"; err = PTR_ERR(d); diff --git a/drivers/isdn/capi/capi.c b/drivers/isdn/capi/capi.c index 38c4bd87b2c..c679867c2cc 100644 --- a/drivers/isdn/capi/capi.c +++ b/drivers/isdn/capi/capi.c @@ -234,7 +234,8 @@ static struct capiminor *capiminor_alloc(struct capi20_appl *ap, u32 ncci) mp->minor = minor; - dev = tty_register_device(capinc_tty_driver, minor, NULL); + dev = tty_port_register_device(&mp->port, capinc_tty_driver, minor, + NULL); if (IS_ERR(dev)) goto err_out2; diff --git a/drivers/isdn/gigaset/interface.c b/drivers/isdn/gigaset/interface.c index f9aab749086..67abf3ff45e 100644 --- a/drivers/isdn/gigaset/interface.c +++ b/drivers/isdn/gigaset/interface.c @@ -524,7 +524,8 @@ void gigaset_if_init(struct cardstate *cs) tasklet_init(&cs->if_wake_tasklet, if_wake, (unsigned long) cs); mutex_lock(&cs->mutex); - cs->tty_dev = tty_register_device(drv->tty, cs->minor_index, NULL); + cs->tty_dev = tty_port_register_device(&cs->port, drv->tty, + cs->minor_index, NULL); if (!IS_ERR(cs->tty_dev)) dev_set_drvdata(cs->tty_dev, cs); diff --git a/drivers/mmc/card/sdio_uart.c b/drivers/mmc/card/sdio_uart.c index 372c0325c14..d2339ea3781 100644 --- a/drivers/mmc/card/sdio_uart.c +++ b/drivers/mmc/card/sdio_uart.c @@ -1132,8 +1132,8 @@ static int sdio_uart_probe(struct sdio_func *func, kfree(port); } else { struct device *dev; - dev = tty_register_device(sdio_uart_tty_driver, - port->index, &func->dev); + dev = tty_port_register_device(&port->port, + sdio_uart_tty_driver, port->index, &func->dev); if (IS_ERR(dev)) { sdio_uart_port_remove(port); ret = PTR_ERR(dev); diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index 7736af75e12..605a4baa9b7 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2287,9 +2287,11 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, if (minor < 0) goto exit; + tty_port_init(&serial->port); + /* register our minor number */ - serial->parent->dev = tty_register_device(tty_drv, minor, - &serial->parent->interface->dev); + serial->parent->dev = tty_port_register_device(&serial->port, tty_drv, + minor, &serial->parent->interface->dev); dev = serial->parent->dev; dev_set_drvdata(dev, serial->parent); i = device_create_file(dev, &dev_attr_hsotype); @@ -2298,7 +2300,6 @@ static int hso_serial_common_create(struct hso_serial *serial, int num_urbs, serial->minor = minor; serial->magic = HSO_SERIAL_MAGIC; spin_lock_init(&serial->serial_lock); - tty_port_init(&serial->port); serial->num_rx_urbs = num_urbs; /* RX, allocate urb and initialize */ diff --git a/drivers/staging/ipack/devices/ipoctal.c b/drivers/staging/ipack/devices/ipoctal.c index 394f5deca34..a68d981c259 100644 --- a/drivers/staging/ipack/devices/ipoctal.c +++ b/drivers/staging/ipack/devices/ipoctal.c @@ -502,7 +502,7 @@ static int ipoctal_inst_slot(struct ipoctal *ipoctal, unsigned int bus_nr, ipoctal->pointer_read[i] = 0; ipoctal->pointer_write[i] = 0; ipoctal->nb_bytes[i] = 0; - tty_register_device(tty, i, NULL); + tty_port_register_device(&ipoctal->tty_port[i], tty, i, NULL); /* * Enable again the RX. TX will be enabled when diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index c8850ea832a..e3954dae506 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -3289,7 +3289,7 @@ static int __init cy_detect_isa(void) struct cyclades_card *card; unsigned short cy_isa_irq, nboard; void __iomem *cy_isa_address; - unsigned short i, j, cy_isa_nchan; + unsigned short i, j, k, cy_isa_nchan; int isparam = 0; nboard = 0; @@ -3392,9 +3392,10 @@ static int __init cy_detect_isa(void) (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)), cy_isa_irq, cy_isa_nchan, cy_next_channel); - for (j = cy_next_channel; - j < cy_next_channel + cy_isa_nchan; j++) - tty_register_device(cy_serial_driver, j, NULL); + for (k = 0, j = cy_next_channel; + j < cy_next_channel + cy_isa_nchan; j++, k++) + tty_port_register_device(&card->ports[k].port, + cy_serial_driver, j, NULL); cy_next_channel += cy_isa_nchan; } return nboard; @@ -3698,7 +3699,7 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, void __iomem *addr0 = NULL, *addr2 = NULL; char *card_name = NULL; u32 uninitialized_var(mailbox); - unsigned int device_id, nchan = 0, card_no, i; + unsigned int device_id, nchan = 0, card_no, i, j; unsigned char plx_ver; int retval, irq; @@ -3909,8 +3910,9 @@ static int __devinit cy_pci_probe(struct pci_dev *pdev, dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from " "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel); - for (i = cy_next_channel; i < cy_next_channel + nchan; i++) - tty_register_device(cy_serial_driver, i, &pdev->dev); + for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++) + tty_port_register_device(&card->ports[j].port, + cy_serial_driver, i, &pdev->dev); cy_next_channel += nchan; return 0; diff --git a/drivers/tty/ehv_bytechan.c b/drivers/tty/ehv_bytechan.c index 4813684cb63..4ab936b7aac 100644 --- a/drivers/tty/ehv_bytechan.c +++ b/drivers/tty/ehv_bytechan.c @@ -738,16 +738,17 @@ static int __devinit ehv_bc_tty_probe(struct platform_device *pdev) goto error; } - bc->dev = tty_register_device(ehv_bc_driver, i, &pdev->dev); + tty_port_init(&bc->port); + bc->port.ops = &ehv_bc_tty_port_ops; + + bc->dev = tty_port_register_device(&bc->port, ehv_bc_driver, i, + &pdev->dev); if (IS_ERR(bc->dev)) { ret = PTR_ERR(bc->dev); dev_err(&pdev->dev, "could not register tty (ret=%i)\n", ret); goto error; } - tty_port_init(&bc->port); - bc->port.ops = &ehv_bc_tty_port_ops; - dev_set_drvdata(&pdev->dev, bc); dev_info(&pdev->dev, "registered /dev/%s%u for byte channel %u\n", diff --git a/drivers/tty/ipwireless/tty.c b/drivers/tty/ipwireless/tty.c index f8b5fa0093a..160f0ad9589 100644 --- a/drivers/tty/ipwireless/tty.c +++ b/drivers/tty/ipwireless/tty.c @@ -476,7 +476,7 @@ static int add_tty(int j, mutex_init(&ttys[j]->ipw_tty_mutex); tty_port_init(&ttys[j]->port); - tty_register_device(ipw_tty_driver, j, NULL); + tty_port_register_device(&ttys[j]->port, ipw_tty_driver, j, NULL); ipwireless_associate_network_tty(network, channel_idx, ttys[j]); if (secondary_channel_idx != -1) diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c index d593a7d18ad..99cf22e5f2b 100644 --- a/drivers/tty/isicom.c +++ b/drivers/tty/isicom.c @@ -1611,7 +1611,8 @@ static int __devinit isicom_probe(struct pci_dev *pdev, goto errunri; for (index = 0; index < board->port_count; index++) - tty_register_device(isicom_normal, board->index * 16 + index, + tty_port_register_device(&board->ports[index].port, + isicom_normal, board->index * 16 + index, &pdev->dev); return 0; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index e64fe40618c..8bc265154ad 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -2625,7 +2625,8 @@ static int __devinit mxser_probe(struct pci_dev *pdev, goto err_rel3; for (i = 0; i < brd->info->nports; i++) - tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); + tty_port_register_device(&brd->ports[i].port, mxvar_sdriver, + brd->idx + i, &pdev->dev); pci_set_drvdata(pdev, brd); @@ -2722,7 +2723,8 @@ static int __init mxser_module_init(void) brd->idx = m * MXSER_PORTS_PER_BOARD; for (i = 0; i < brd->info->nports; i++) - tty_register_device(mxvar_sdriver, brd->idx + i, NULL); + tty_port_register_device(&brd->ports[i].port, + mxvar_sdriver, brd->idx + i, NULL); m++; } diff --git a/drivers/tty/nozomi.c b/drivers/tty/nozomi.c index e7592f9037d..b917c942495 100644 --- a/drivers/tty/nozomi.c +++ b/drivers/tty/nozomi.c @@ -1473,8 +1473,8 @@ static int __devinit nozomi_card_init(struct pci_dev *pdev, port->dc = dc; tty_port_init(&port->port); port->port.ops = &noz_tty_port_ops; - tty_dev = tty_register_device(ntty_driver, dc->index_start + i, - &pdev->dev); + tty_dev = tty_port_register_device(&port->port, ntty_driver, + dc->index_start + i, &pdev->dev); if (IS_ERR(tty_dev)) { ret = PTR_ERR(tty_dev); diff --git a/drivers/tty/rocket.c b/drivers/tty/rocket.c index 016984a460e..9700d34b20a 100644 --- a/drivers/tty/rocket.c +++ b/drivers/tty/rocket.c @@ -704,8 +704,8 @@ static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev) spin_lock_init(&info->slock); mutex_init(&info->write_mtx); rp_table[line] = info; - tty_register_device(rocket_driver, line, pci_dev ? &pci_dev->dev : - NULL); + tty_port_register_device(&info->port, rocket_driver, line, + pci_dev ? &pci_dev->dev : NULL); } /* diff --git a/drivers/tty/serial/ifx6x60.c b/drivers/tty/serial/ifx6x60.c index 144cd3987d4..3f0c256d8ef 100644 --- a/drivers/tty/serial/ifx6x60.c +++ b/drivers/tty/serial/ifx6x60.c @@ -800,8 +800,8 @@ static int ifx_spi_create_port(struct ifx_spi_device *ifx_dev) tty_port_init(pport); pport->ops = &ifx_tty_port_ops; ifx_dev->minor = IFX_SPI_TTY_ID; - ifx_dev->tty_dev = tty_register_device(tty_drv, ifx_dev->minor, - &ifx_dev->spi_dev->dev); + ifx_dev->tty_dev = tty_port_register_device(pport, tty_drv, + ifx_dev->minor, &ifx_dev->spi_dev->dev); if (IS_ERR(ifx_dev->tty_dev)) { dev_dbg(&ifx_dev->spi_dev->dev, "%s: registering tty device failed", __func__); diff --git a/drivers/tty/serial/msm_smd_tty.c b/drivers/tty/serial/msm_smd_tty.c index b25e6ee7144..925d1fa153d 100644 --- a/drivers/tty/serial/msm_smd_tty.c +++ b/drivers/tty/serial/msm_smd_tty.c @@ -223,9 +223,11 @@ static int __init smd_tty_init(void) return ret; for (i = 0; i < smd_tty_channels_len; i++) { - tty_port_init(&smd_tty[smd_tty_channels[i].id].port); - smd_tty[smd_tty_channels[i].id].port.ops = &smd_tty_port_ops; - tty_register_device(smd_tty_driver, smd_tty_channels[i].id, 0); + struct tty_port *port = &smd_tty[smd_tty_channels[i].id].port; + tty_port_init(port); + port->ops = &smd_tty_port_ops; + tty_port_register_device(port, smd_tty_driver, + smd_tty_channels[i].id, NULL); } return 0; diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index d98b1bd407f..5b308c87b68 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2346,7 +2346,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) * Register the port whether it's detected or not. This allows * setserial to be used to alter this ports parameters. */ - tty_dev = tty_register_device(drv->tty_driver, uport->line, uport->dev); + tty_dev = tty_port_register_device(port, drv->tty_driver, uport->line, + uport->dev); if (likely(!IS_ERR(tty_dev))) { device_set_wakeup_capable(tty_dev, 1); } else { diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 913025369fe..45f6136f4e5 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -3689,8 +3689,11 @@ static void device_init(int adapter_num, struct pci_dev *pdev) } } - for (i=0; i < port_count; ++i) - tty_register_device(serial_driver, port_array[i]->line, &(port_array[i]->pdev->dev)); + for (i = 0; i < port_count; ++i) { + struct slgt_info *info = port_array[i]; + tty_port_register_device(&info->port, serial_driver, info->line, + &info->pdev->dev); + } } static int __devinit init_one(struct pci_dev *dev, diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 18f4e62aaa7..455ef164923 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1298,7 +1298,8 @@ skip_countries: usb_set_intfdata(data_interface, acm); usb_get_intf(control_interface); - tty_register_device(acm_tty_driver, minor, &control_interface->dev); + tty_port_register_device(&acm->port, acm_tty_driver, minor, + &control_interface->dev); return 0; alloc_fail7: diff --git a/drivers/usb/gadget/u_serial.c b/drivers/usb/gadget/u_serial.c index 5b3f5fffea9..2b5534c2ab8 100644 --- a/drivers/usb/gadget/u_serial.c +++ b/drivers/usb/gadget/u_serial.c @@ -1129,7 +1129,8 @@ int gserial_setup(struct usb_gadget *g, unsigned count) for (i = 0; i < count; i++) { struct device *tty_dev; - tty_dev = tty_register_device(gs_tty_driver, i, &g->dev); + tty_dev = tty_port_register_device(&ports[i].port->port, + gs_tty_driver, i, &g->dev); if (IS_ERR(tty_dev)) pr_warning("%s: no classdev for port %d, err %ld\n", __func__, i, PTR_ERR(tty_dev)); diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index b54c86a2e66..18a80b94a8b 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -278,8 +278,8 @@ out: if (err < 0) goto free; - dev->tty_dev = tty_register_device(rfcomm_tty_driver, dev->id, NULL); - + dev->tty_dev = tty_port_register_device(&dev->port, rfcomm_tty_driver, + dev->id, NULL); if (IS_ERR(dev->tty_dev)) { err = PTR_ERR(dev->tty_dev); list_del(&dev->list); From c4d6ebeb7d78ea8eabd5efe9ef876fe371cb5f4b Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:48 +0200 Subject: [PATCH 095/235] TTY: automatically create nodes for some drivers This looks like it was a mistake not to create device nodes for these drivers. Let us create them from now on. It will be necessary to call tty_register_device some way, either by tty_register_driver implicitly or to call tty_register_device proper. Signed-off-by: Jiri Slaby Cc: netdev@vger.kernel.org Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Cc: linux-cris-kernel@axis.com Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/isdn/i4l/isdn_tty.c | 2 +- drivers/s390/char/tty3270.c | 2 +- drivers/tty/serial/crisv10.c | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 7a61ef6cffa..576ce4b14f9 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -1782,7 +1782,7 @@ isdn_tty_modem_init(void) m->tty_modem->subtype = SERIAL_TYPE_NORMAL; m->tty_modem->init_termios = tty_std_termios; m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + m->tty_modem->flags = TTY_DRIVER_REAL_RAW; m->tty_modem->driver_name = "isdn_tty"; tty_set_operations(m->tty_modem, &modem_ops); retval = tty_register_driver(m->tty_modem); diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index 215037c745c..f2b8c6c533e 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -1781,7 +1781,7 @@ static int __init tty3270_init(void) driver->type = TTY_DRIVER_TYPE_SYSTEM; driver->subtype = SYSTEM_TYPE_TTY; driver->init_termios = tty_std_termios; - driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV; + driver->flags = TTY_DRIVER_RESET_TERMIOS; tty_set_operations(driver, &tty3270_ops); ret = tty_register_driver(driver); if (ret) { diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index a770b101296..5ecec3b120e 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -4443,7 +4443,7 @@ static int __init rs_init(void) B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */ driver->init_termios.c_ispeed = 115200; driver->init_termios.c_ospeed = 115200; - driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; + driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(driver, &rs_ops); serial_driver = driver; From 72a33bf58c50892bce7ee4f58d487e818dec1c7e Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:49 +0200 Subject: [PATCH 096/235] TTY: tty_port, add some documentation I forgot to document tty_port_register_device and tty_port_install when they were added. Fix it now. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_port.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 5246763cff0..c2f0592bcb2 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -33,6 +33,17 @@ void tty_port_init(struct tty_port *port) } EXPORT_SYMBOL(tty_port_init); +/** + * tty_port_register_device - register tty device + * @port: tty_port of the device + * @driver: tty_driver for this device + * @index: index of the tty + * @device: parent if exists, otherwise NULL + * + * It is the same as tty_register_device except the provided @port is linked to + * a concrete tty specified by @index. Use this or tty_port_install (or both). + * Call tty_port_link_device as a last resort. + */ struct device *tty_port_register_device(struct tty_port *port, struct tty_driver *driver, unsigned index, struct device *device) @@ -422,6 +433,16 @@ void tty_port_close(struct tty_port *port, struct tty_struct *tty, } EXPORT_SYMBOL(tty_port_close); +/** + * tty_port_install - generic tty->ops->install handler + * @port: tty_port of the device + * @driver: tty_driver for this device + * @tty: tty to be installed + * + * It is the same as tty_standard_install except the provided @port is linked + * to a concrete tty specified by @tty. Use this or tty_port_register_device + * (or both). Call tty_port_link_device as a last resort. + */ int tty_port_install(struct tty_port *port, struct tty_driver *driver, struct tty_struct *tty) { From 2cb4ca0208722836e921d5ba780b09f29d4026b8 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:50 +0200 Subject: [PATCH 097/235] TTY: add tty_port_link_device This is for those drivers which do not have dynamic device creation (do not call tty_port_register_device) and do not want to implement tty->ops->install (will not call tty_port_install). They still have to provide the link somehow though. And this newly added function is exactly to serve that purpose. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_port.c | 22 +++++++++++++++++++++- include/linux/tty.h | 2 ++ 2 files changed, 23 insertions(+), 1 deletion(-) diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index c2f0592bcb2..96302f4c707 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -33,6 +33,26 @@ void tty_port_init(struct tty_port *port) } EXPORT_SYMBOL(tty_port_init); +/** + * tty_port_link_device - link tty and tty_port + * @port: tty_port of the device + * @driver: tty_driver for this device + * @index: index of the tty + * + * Provide the tty layer wit ha link from a tty (specified by @index) to a + * tty_port (@port). Use this only if neither tty_port_register_device nor + * tty_port_install is used in the driver. If used, this has to be called before + * tty_register_driver. + */ +void tty_port_link_device(struct tty_port *port, + struct tty_driver *driver, unsigned index) +{ + if (WARN_ON(index >= driver->num)) + return; + driver->ports[index] = port; +} +EXPORT_SYMBOL_GPL(tty_port_link_device); + /** * tty_port_register_device - register tty device * @port: tty_port of the device @@ -48,7 +68,7 @@ struct device *tty_port_register_device(struct tty_port *port, struct tty_driver *driver, unsigned index, struct device *device) { - driver->ports[index] = port; + tty_port_link_device(port, driver, index); return tty_register_device(driver, index, device); } EXPORT_SYMBOL_GPL(tty_port_register_device); diff --git a/include/linux/tty.h b/include/linux/tty.h index acca24bf06a..69a787fdfa9 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -497,6 +497,8 @@ extern int tty_write_lock(struct tty_struct *tty, int ndelay); #define tty_is_writelocked(tty) (mutex_is_locked(&tty->atomic_write_lock)) extern void tty_port_init(struct tty_port *port); +extern void tty_port_link_device(struct tty_port *port, + struct tty_driver *driver, unsigned index); extern struct device *tty_port_register_device(struct tty_port *port, struct tty_driver *driver, unsigned index, struct device *device); From b19e2ca77ee4becadc85341bb0c1cee454dd4fd5 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:51 +0200 Subject: [PATCH 098/235] TTY: use tty_port_link_device So now for those drivers that can use neither tty_port_install nor tty_port_register_driver but still have tty_port available before tty_register_driver we use newly added tty_port_link_device. The rest of the drivers that still do not provide tty_struct <-> tty_port link will have to be converted to implement tty->ops->install. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- arch/alpha/kernel/srmcons.c | 1 + arch/ia64/hp/sim/simserial.c | 1 + arch/parisc/kernel/pdc_cons.c | 1 + arch/xtensa/platforms/iss/console.c | 1 + drivers/char/ttyprintk.c | 1 + drivers/s390/char/sclp_tty.c | 1 + drivers/s390/char/sclp_vt220.c | 1 + drivers/tty/amiserial.c | 9 +++++---- drivers/tty/bfin_jtag_comm.c | 1 + drivers/tty/hvc/hvsi.c | 2 ++ drivers/tty/serial/68328serial.c | 15 +++++++++------ drivers/tty/serial/crisv10.c | 9 ++++++--- 12 files changed, 30 insertions(+), 13 deletions(-) diff --git a/arch/alpha/kernel/srmcons.c b/arch/alpha/kernel/srmcons.c index 3ea809430ed..5d5865204a1 100644 --- a/arch/alpha/kernel/srmcons.c +++ b/arch/alpha/kernel/srmcons.c @@ -223,6 +223,7 @@ srmcons_init(void) driver->subtype = SYSTEM_TYPE_SYSCONS; driver->init_termios = tty_std_termios; tty_set_operations(driver, &srmcons_ops); + tty_port_link_device(&srmcons_singleton.port, driver, 0); err = tty_register_driver(driver); if (err) { put_tty_driver(driver); diff --git a/arch/ia64/hp/sim/simserial.c b/arch/ia64/hp/sim/simserial.c index 1ce97f497d2..ec536e4e36c 100644 --- a/arch/ia64/hp/sim/simserial.c +++ b/arch/ia64/hp/sim/simserial.c @@ -545,6 +545,7 @@ static int __init simrs_init(void) /* the port is imaginary */ printk(KERN_INFO "ttyS0 at 0x03f8 (irq = %d) is a 16550\n", state->irq); + tty_port_link_device(&state->port, hp_simserial_driver, 0); retval = tty_register_driver(hp_simserial_driver); if (retval) { printk(KERN_ERR "Couldn't register simserial driver\n"); diff --git a/arch/parisc/kernel/pdc_cons.c b/arch/parisc/kernel/pdc_cons.c index 47341aa208f..88238638aee 100644 --- a/arch/parisc/kernel/pdc_cons.c +++ b/arch/parisc/kernel/pdc_cons.c @@ -202,6 +202,7 @@ static int __init pdc_console_tty_driver_init(void) pdc_console_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_RESET_TERMIOS; tty_set_operations(pdc_console_tty_driver, &pdc_console_tty_ops); + tty_port_link_device(&tty_port, pdc_console_tty_driver, 0); err = tty_register_driver(pdc_console_tty_driver); if (err) { diff --git a/arch/xtensa/platforms/iss/console.c b/arch/xtensa/platforms/iss/console.c index f9726f6afdf..2cd3d3a3400 100644 --- a/arch/xtensa/platforms/iss/console.c +++ b/arch/xtensa/platforms/iss/console.c @@ -223,6 +223,7 @@ int __init rs_init(void) serial_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(serial_driver, &serial_ops); + tty_port_link_device(&serial_port, serial_driver, 0); if (tty_register_driver(serial_driver)) panic("Couldn't register serial driver\n"); diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 9e6272f0b98..561f8aa7cd8 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -198,6 +198,7 @@ static int __init ttyprintk_init(void) ttyprintk_driver->init_termios = tty_std_termios; ttyprintk_driver->init_termios.c_oflag = OPOST | OCRNL | ONOCR | ONLRET; tty_set_operations(ttyprintk_driver, &ttyprintk_ops); + tty_port_link_device(&tpk_port.port, ttyprintk_driver, 0); ret = tty_register_driver(ttyprintk_driver); if (ret < 0) { diff --git a/drivers/s390/char/sclp_tty.c b/drivers/s390/char/sclp_tty.c index 0792c85baaf..30ec09e3d03 100644 --- a/drivers/s390/char/sclp_tty.c +++ b/drivers/s390/char/sclp_tty.c @@ -567,6 +567,7 @@ sclp_tty_init(void) driver->init_termios.c_lflag = ISIG | ECHO; driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(driver, &sclp_ops); + tty_port_link_device(&sclp_port, driver, 0); rc = tty_register_driver(driver); if (rc) { put_tty_driver(driver); diff --git a/drivers/s390/char/sclp_vt220.c b/drivers/s390/char/sclp_vt220.c index edfc0fd73dc..7e60f3d2f3f 100644 --- a/drivers/s390/char/sclp_vt220.c +++ b/drivers/s390/char/sclp_vt220.c @@ -691,6 +691,7 @@ static int __init sclp_vt220_tty_init(void) driver->init_termios = tty_std_termios; driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(driver, &sclp_vt220_ops); + tty_port_link_device(&sclp_vt220_port, driver, 0); rc = tty_register_driver(driver); if (rc) diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 998731f01d6..2b7535d42e0 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -1710,10 +1710,6 @@ static int __init amiga_serial_probe(struct platform_device *pdev) serial_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(serial_driver, &serial_ops); - error = tty_register_driver(serial_driver); - if (error) - goto fail_put_tty_driver; - state = rs_table; state->port = (int)&custom.serdatr; /* Just to give it a value */ state->custom_divisor = 0; @@ -1724,6 +1720,11 @@ static int __init amiga_serial_probe(struct platform_device *pdev) state->icount.overrun = state->icount.brk = 0; tty_port_init(&state->tport); state->tport.ops = &amiga_port_ops; + tty_port_link_device(&state->tport, serial_driver, 0); + + error = tty_register_driver(serial_driver); + if (error) + goto fail_put_tty_driver; printk(KERN_INFO "ttyS0 is the amiga builtin serial port\n"); diff --git a/drivers/tty/bfin_jtag_comm.c b/drivers/tty/bfin_jtag_comm.c index 61fc74fe174..02b7d3a0969 100644 --- a/drivers/tty/bfin_jtag_comm.c +++ b/drivers/tty/bfin_jtag_comm.c @@ -263,6 +263,7 @@ static int __init bfin_jc_init(void) bfin_jc_driver->subtype = SERIAL_TYPE_NORMAL; bfin_jc_driver->init_termios = tty_std_termios; tty_set_operations(bfin_jc_driver, &bfin_jc_ops); + tty_port_link_device(&port, bfin_jc_driver, 0); ret = tty_register_driver(bfin_jc_driver); if (ret) diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c index 6f5bc49c441..0083bc1f63f 100644 --- a/drivers/tty/hvc/hvsi.c +++ b/drivers/tty/hvc/hvsi.c @@ -1080,6 +1080,8 @@ static int __init hvsi_init(void) struct hvsi_struct *hp = &hvsi_ports[i]; int ret = 1; + tty_port_link_device(&hp->port, hvsi_driver, i); + ret = request_irq(hp->virq, hvsi_interrupt, 0, "hvsi", hp); if (ret) printk(KERN_ERR "HVSI: couldn't reserve irq 0x%x (error %i)\n", diff --git a/drivers/tty/serial/68328serial.c b/drivers/tty/serial/68328serial.c index cc4c092fef0..66c38a3f74c 100644 --- a/drivers/tty/serial/68328serial.c +++ b/drivers/tty/serial/68328serial.c @@ -1189,12 +1189,6 @@ rs68328_init(void) serial_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(serial_driver, &rs_ops); - if (tty_register_driver(serial_driver)) { - put_tty_driver(serial_driver); - printk(KERN_ERR "Couldn't register serial driver\n"); - return -ENOMEM; - } - local_irq_save(flags); for(i=0;itport, serial_driver, i); } local_irq_restore(flags); + + if (tty_register_driver(serial_driver)) { + put_tty_driver(serial_driver); + printk(KERN_ERR "Couldn't register serial driver\n"); + return -ENOMEM; + } + return 0; } diff --git a/drivers/tty/serial/crisv10.c b/drivers/tty/serial/crisv10.c index 5ecec3b120e..35ee6a2c687 100644 --- a/drivers/tty/serial/crisv10.c +++ b/drivers/tty/serial/crisv10.c @@ -4447,10 +4447,8 @@ static int __init rs_init(void) tty_set_operations(driver, &rs_ops); serial_driver = driver; - if (tty_register_driver(driver)) - panic("Couldn't register serial driver\n"); - /* do some initializing for the separate ports */ + /* do some initializing for the separate ports */ for (i = 0, info = rs_table; i < NR_PORTS; i++,info++) { if (info->enabled) { if (cris_request_io_interface(info->io_if, @@ -4502,7 +4500,12 @@ static int __init rs_init(void) printk(KERN_INFO "%s%d at %p is a builtin UART with DMA\n", serial_driver->name, info->line, info->ioport); } + tty_port_link_device(&info->port, driver, i); } + + if (tty_register_driver(driver)) + panic("Couldn't register serial driver\n"); + #ifdef CONFIG_ETRAX_FAST_TIMER #ifdef CONFIG_ETRAX_SERIAL_FAST_TIMER memset(fast_timers, 0, sizeof(fast_timers)); From 737586fe51e6d0031f83d781c0cb2f3abf8caada Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:52 +0200 Subject: [PATCH 099/235] TTY: synclink_cs, sanitize fail paths We will need to change the order of tty and pcmcia drivers initializations (see the reason later in this series). And the fail path handling is currently performed in a separate function that as well takes care of proper deinitialization in module_exit. It is hard to read and will need to be adjusted by our changes anyway. Instead, get rid of this helper function and do the fail paths handling directly in the init function. (And move the body of the function to module_exit.) Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 41 +++++++++++-------------------- 1 file changed, 14 insertions(+), 27 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index d0cbd29ecfd..0606586e76a 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2798,23 +2798,6 @@ static const struct tty_operations mgslpc_ops = { .proc_fops = &mgslpc_proc_fops, }; -static void synclink_cs_cleanup(void) -{ - int rc; - - while(mgslpc_device_list) - mgslpc_remove_device(mgslpc_device_list); - - if (serial_driver) { - if ((rc = tty_unregister_driver(serial_driver))) - printk("%s(%d) failed to unregister tty driver err=%d\n", - __FILE__,__LINE__,rc); - put_tty_driver(serial_driver); - } - - pcmcia_unregister_driver(&mgslpc_driver); -} - static int __init synclink_cs_init(void) { int rc; @@ -2830,7 +2813,7 @@ static int __init synclink_cs_init(void) serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); if (!serial_driver) { rc = -ENOMEM; - goto error; + goto err_pcmcia_drv; } /* Initialize the tty_driver structure */ @@ -2850,25 +2833,29 @@ static int __init synclink_cs_init(void) if ((rc = tty_register_driver(serial_driver)) < 0) { printk("%s(%d):Couldn't register serial driver\n", __FILE__,__LINE__); - put_tty_driver(serial_driver); - serial_driver = NULL; - goto error; + goto err_put_tty; } printk("%s %s, tty major#%d\n", driver_name, driver_version, serial_driver->major); - return 0; - -error: - synclink_cs_cleanup(); - return rc; + return 0; +err_put_tty: + put_tty_driver(serial_driver); +err_pcmcia_drv: + pcmcia_unregister_driver(&mgslpc_driver); + return rc; } static void __exit synclink_cs_exit(void) { - synclink_cs_cleanup(); + while (mgslpc_device_list) + mgslpc_remove_device(mgslpc_device_list); + + tty_unregister_driver(serial_driver); + put_tty_driver(serial_driver); + pcmcia_unregister_driver(&mgslpc_driver); } module_init(synclink_cs_init); From 16a1065f2113b2c068ea108a681fb6b1f3a02ce0 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:53 +0200 Subject: [PATCH 100/235] TTY: synclink_cs, use dynamic tty devices This allows us to provide the tty layer with information about tty_port for each link. And it also allows us to get rid of the remove_device loop in synclink_cs_exit because we had to reorder pcmcia and tty driver registration in init. This was because we need to have serial_driver initialized when calling tty_port_register_device from pcmcia ->probe. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 27 +++++++++++++++------------ 1 file changed, 15 insertions(+), 12 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 0606586e76a..ce277f74bd1 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2731,6 +2731,8 @@ static void mgslpc_add_device(MGSLPC_INFO *info) #if SYNCLINK_GENERIC_HDLC hdlcdev_init(info); #endif + tty_port_register_device(&info->port, serial_driver, info->line, + &info->p_dev.dev); } static void mgslpc_remove_device(MGSLPC_INFO *remove_info) @@ -2744,6 +2746,7 @@ static void mgslpc_remove_device(MGSLPC_INFO *remove_info) last->next_device = info->next_device; else mgslpc_device_list = info->next_device; + tty_unregister_device(serial_driver, info->line); #if SYNCLINK_GENERIC_HDLC hdlcdev_exit(info); #endif @@ -2807,13 +2810,12 @@ static int __init synclink_cs_init(void) BREAKPOINT(); } - if ((rc = pcmcia_register_driver(&mgslpc_driver)) < 0) - return rc; - - serial_driver = alloc_tty_driver(MAX_DEVICE_COUNT); + serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV); if (!serial_driver) { rc = -ENOMEM; - goto err_pcmcia_drv; + goto err; } /* Initialize the tty_driver structure */ @@ -2827,7 +2829,6 @@ static int __init synclink_cs_init(void) serial_driver->init_termios = tty_std_termios; serial_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL; - serial_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(serial_driver, &mgslpc_ops); if ((rc = tty_register_driver(serial_driver)) < 0) { @@ -2836,26 +2837,28 @@ static int __init synclink_cs_init(void) goto err_put_tty; } + rc = pcmcia_register_driver(&mgslpc_driver); + if (rc < 0) + goto err_unreg_tty; + printk("%s %s, tty major#%d\n", driver_name, driver_version, serial_driver->major); return 0; +err_unreg_tty: + tty_unregister_driver(serial_driver); err_put_tty: put_tty_driver(serial_driver); -err_pcmcia_drv: - pcmcia_unregister_driver(&mgslpc_driver); +err: return rc; } static void __exit synclink_cs_exit(void) { - while (mgslpc_device_list) - mgslpc_remove_device(mgslpc_device_list); - + pcmcia_unregister_driver(&mgslpc_driver); tty_unregister_driver(serial_driver); put_tty_driver(serial_driver); - pcmcia_unregister_driver(&mgslpc_driver); } module_init(synclink_cs_init); From cc93441eed0d39af9d99ba1642b9f733b195435c Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:54 +0200 Subject: [PATCH 101/235] TTY: synclink_cs, final cleanup in synclink_cs_init * use for indentation * add KERN_* to printks * no more assignments in if's like if ((rc = function())) Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 63 +++++++++++++++---------------- 1 file changed, 31 insertions(+), 32 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index ce277f74bd1..923c3a47db0 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2803,47 +2803,46 @@ static const struct tty_operations mgslpc_ops = { static int __init synclink_cs_init(void) { - int rc; + int rc; - if (break_on_load) { - mgslpc_get_text_ptr(); - BREAKPOINT(); - } + if (break_on_load) { + mgslpc_get_text_ptr(); + BREAKPOINT(); + } - serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, - TTY_DRIVER_REAL_RAW | - TTY_DRIVER_DYNAMIC_DEV); - if (!serial_driver) { - rc = -ENOMEM; - goto err; - } + serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV); + if (!serial_driver) { + rc = -ENOMEM; + goto err; + } - /* Initialize the tty_driver structure */ + /* Initialize the tty_driver structure */ + serial_driver->driver_name = "synclink_cs"; + serial_driver->name = "ttySLP"; + serial_driver->major = ttymajor; + serial_driver->minor_start = 64; + serial_driver->type = TTY_DRIVER_TYPE_SERIAL; + serial_driver->subtype = SERIAL_TYPE_NORMAL; + serial_driver->init_termios = tty_std_termios; + serial_driver->init_termios.c_cflag = + B9600 | CS8 | CREAD | HUPCL | CLOCAL; + tty_set_operations(serial_driver, &mgslpc_ops); - serial_driver->driver_name = "synclink_cs"; - serial_driver->name = "ttySLP"; - serial_driver->major = ttymajor; - serial_driver->minor_start = 64; - serial_driver->type = TTY_DRIVER_TYPE_SERIAL; - serial_driver->subtype = SERIAL_TYPE_NORMAL; - serial_driver->init_termios = tty_std_termios; - serial_driver->init_termios.c_cflag = - B9600 | CS8 | CREAD | HUPCL | CLOCAL; - tty_set_operations(serial_driver, &mgslpc_ops); - - if ((rc = tty_register_driver(serial_driver)) < 0) { - printk("%s(%d):Couldn't register serial driver\n", - __FILE__,__LINE__); - goto err_put_tty; - } + rc = tty_register_driver(serial_driver); + if (rc < 0) { + printk(KERN_ERR "%s(%d):Couldn't register serial driver\n", + __FILE__, __LINE__); + goto err_put_tty; + } rc = pcmcia_register_driver(&mgslpc_driver); if (rc < 0) goto err_unreg_tty; - printk("%s %s, tty major#%d\n", - driver_name, driver_version, - serial_driver->major); + printk(KERN_INFO "%s %s, tty major#%d\n", driver_name, driver_version, + serial_driver->major); return 0; err_unreg_tty: From 793be8984fb979ae8887609862842cbb1f60bfaf Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:55 +0200 Subject: [PATCH 102/235] TTY: moxa, convert to dynamic device This allows us to provide the tty layer with information about tty_port for each link. We also provide a tty_port for the service port. For this one we allow only ioctl, so this is pretty ugly. Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/moxa.c | 24 ++++++++++++++++++++---- 1 file changed, 20 insertions(+), 4 deletions(-) diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 89cc9344325..9dffc724d46 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -169,6 +169,7 @@ static DEFINE_SPINLOCK(moxa_lock); static unsigned long baseaddr[MAX_BOARDS]; static unsigned int type[MAX_BOARDS]; static unsigned int numports[MAX_BOARDS]; +static struct tty_port moxa_service_port; MODULE_AUTHOR("William Chen"); MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); @@ -834,7 +835,7 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) const struct firmware *fw; const char *file; struct moxa_port *p; - unsigned int i; + unsigned int i, first_idx; int ret; brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), @@ -887,6 +888,11 @@ static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) mod_timer(&moxaTimer, jiffies + HZ / 50); spin_unlock_bh(&moxa_lock); + first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; + for (i = 0; i < brd->numPorts; i++) + tty_port_register_device(&brd->ports[i].port, moxaDriver, + first_idx + i, dev); + return 0; err_free: kfree(brd->ports); @@ -896,7 +902,7 @@ err: static void moxa_board_deinit(struct moxa_board_conf *brd) { - unsigned int a, opened; + unsigned int a, opened, first_idx; mutex_lock(&moxa_openlock); spin_lock_bh(&moxa_lock); @@ -925,6 +931,10 @@ static void moxa_board_deinit(struct moxa_board_conf *brd) mutex_lock(&moxa_openlock); } + first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; + for (a = 0; a < brd->numPorts; a++) + tty_unregister_device(moxaDriver, first_idx + a); + iounmap(brd->basemem); brd->basemem = NULL; kfree(brd->ports); @@ -1031,7 +1041,12 @@ static int __init moxa_init(void) printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION); - moxaDriver = alloc_tty_driver(MAX_PORTS + 1); + + tty_port_init(&moxa_service_port); + + moxaDriver = tty_alloc_driver(MAX_PORTS + 1, + TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV); if (!moxaDriver) return -ENOMEM; @@ -1044,8 +1059,9 @@ static int __init moxa_init(void) moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; moxaDriver->init_termios.c_ispeed = 9600; moxaDriver->init_termios.c_ospeed = 9600; - moxaDriver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(moxaDriver, &moxa_ops); + /* Having one more port only for ioctls is ugly */ + tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); if (tty_register_driver(moxaDriver)) { printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); From 5920c2c9b9a16e86eb154fbb55d6034fbaad1b2b Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:56 +0200 Subject: [PATCH 103/235] TTY: nfcon, add tty_port and link it Every tty driver needs tty_port for each line. So let us add one to nfcon too. And link it so that the tty layer knows about it. Signed-off-by: Jiri Slaby Cc: Geert Uytterhoeven Cc: linux-m68k@lists.linux-m68k.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- arch/m68k/emu/nfcon.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/m68k/emu/nfcon.c b/arch/m68k/emu/nfcon.c index 8db25e80694..16d170f53bf 100644 --- a/arch/m68k/emu/nfcon.c +++ b/arch/m68k/emu/nfcon.c @@ -19,6 +19,7 @@ #include static int stderr_id; +static struct tty_port nfcon_tty_port; static struct tty_driver *nfcon_tty_driver; static void nfputs(const char *str, unsigned int count) @@ -119,6 +120,8 @@ static int __init nfcon_init(void) { int res; + tty_port_init(&nfcon_tty_port); + stderr_id = nf_get_id("NF_STDERR"); if (!stderr_id) return -ENODEV; @@ -135,6 +138,7 @@ static int __init nfcon_init(void) nfcon_tty_driver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(nfcon_tty_driver, &nfcon_tty_ops); + tty_port_link_device(&nfcon_tty_port, nfcon_tty_driver, 0); res = tty_register_driver(nfcon_tty_driver); if (res) { pr_err("failed to register nfcon tty driver\n"); From 3ec0a17ef5f4ea922b10ebfdb99473c4d8d6120d Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:57 +0200 Subject: [PATCH 104/235] TTY: con3215, unset raw3215[line] raw3215[line] is set in probe, but not unset in remove. This will lead to random crashes if the device is removed and the corresponding tty opened later. open would dereference freed memory. So set raw3215[line] to NULL in remove to fix that. Signed-off-by: Jiri Slaby Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/con3215.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index 6c0116d48c7..16554982671 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -716,10 +716,17 @@ static int raw3215_probe (struct ccw_device *cdev) static void raw3215_remove (struct ccw_device *cdev) { struct raw3215_info *raw; + unsigned int line; ccw_device_set_offline(cdev); raw = dev_get_drvdata(&cdev->dev); if (raw) { + spin_lock(&raw3215_device_lock); + for (line = 0; line < NR_3215; line++) + if (raw3215[line] == raw) + break; + raw3215[line] = NULL; + spin_unlock(&raw3215_device_lock); dev_set_drvdata(&cdev->dev, NULL); raw3215_free_info(raw); } From d2281107457cacf44d60b8a97c5db1af27c3a716 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:58 +0200 Subject: [PATCH 105/235] TTY: con3215, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty Signed-off-by: Jiri Slaby Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/con3215.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-) diff --git a/drivers/s390/char/con3215.c b/drivers/s390/char/con3215.c index 16554982671..9ffb6d5f17a 100644 --- a/drivers/s390/char/con3215.c +++ b/drivers/s390/char/con3215.c @@ -942,6 +942,19 @@ static int __init con3215_init(void) console_initcall(con3215_init); #endif +static int tty3215_install(struct tty_driver *driver, struct tty_struct *tty) +{ + struct raw3215_info *raw; + + raw = raw3215[tty->index]; + if (raw == NULL) + return -ENODEV; + + tty->driver_data = raw; + + return tty_port_install(&raw->port, driver, tty); +} + /* * tty3215_open * @@ -949,14 +962,9 @@ console_initcall(con3215_init); */ static int tty3215_open(struct tty_struct *tty, struct file * filp) { - struct raw3215_info *raw; + struct raw3215_info *raw = tty->driver_data; int retval; - raw = raw3215[tty->index]; - if (raw == NULL) - return -ENODEV; - - tty->driver_data = raw; tty_port_tty_set(&raw->port, tty); tty->low_latency = 0; /* don't use bottom half for pushing chars */ @@ -1117,6 +1125,7 @@ static void tty3215_start(struct tty_struct *tty) } static const struct tty_operations tty3215_ops = { + .install = tty3215_install, .open = tty3215_open, .close = tty3215_close, .write = tty3215_write, From f7e0405e7416424c2db2155949dca1daa0225089 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:47:59 +0200 Subject: [PATCH 106/235] TTY: i4l, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty The "tty->port = port" assignment is not needed anymore since it happens in tty_port_install implicitly. Signed-off-by: Jiri Slaby Cc: Karsten Keil Cc: netdev@vger.kernel.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/isdn/i4l/isdn_tty.c | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-) diff --git a/drivers/isdn/i4l/isdn_tty.c b/drivers/isdn/i4l/isdn_tty.c index 576ce4b14f9..b817809f763 100644 --- a/drivers/isdn/i4l/isdn_tty.c +++ b/drivers/isdn/i4l/isdn_tty.c @@ -1486,6 +1486,18 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) * ------------------------------------------------------------ */ +static int isdn_tty_install(struct tty_driver *driver, struct tty_struct *tty) +{ + modem_info *info = &dev->mdm.info[tty->index]; + + if (isdn_tty_paranoia_check(info, tty->name, __func__)) + return -ENODEV; + + tty->driver_data = info; + + return tty_port_install(&info->port, driver, tty); +} + /* * This routine is called whenever a serial port is opened. It * enables interrupts for a serial port, linking in its async structure into @@ -1495,22 +1507,16 @@ isdn_tty_set_termios(struct tty_struct *tty, struct ktermios *old_termios) static int isdn_tty_open(struct tty_struct *tty, struct file *filp) { - struct tty_port *port; - modem_info *info; + modem_info *info = tty->driver_data; + struct tty_port *port = &info->port; int retval; - info = &dev->mdm.info[tty->index]; - if (isdn_tty_paranoia_check(info, tty->name, "isdn_tty_open")) - return -ENODEV; - port = &info->port; #ifdef ISDN_DEBUG_MODEM_OPEN printk(KERN_DEBUG "isdn_tty_open %s, count = %d\n", tty->name, port->count); #endif port->count++; - tty->driver_data = info; port->tty = tty; - tty->port = port; /* * Start up serial port */ @@ -1738,6 +1744,7 @@ modem_write_profile(atemu *m) } static const struct tty_operations modem_ops = { + .install = isdn_tty_install, .open = isdn_tty_open, .close = isdn_tty_close, .write = isdn_tty_write, From 8a3ad1047593f1f6f431140f7dd9748423c51cd1 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:00 +0200 Subject: [PATCH 107/235] TTY: synclink, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/synclink.c | 44 +++++++++++++++++++++++++----------------- 1 file changed, 26 insertions(+), 18 deletions(-) diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 991bae82123..666aa1455fc 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -3362,6 +3362,29 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, } /* end of block_til_ready() */ +static int mgsl_install(struct tty_driver *driver, struct tty_struct *tty) +{ + struct mgsl_struct *info; + int line = tty->index; + + /* verify range of specified line number */ + if (line >= mgsl_device_count) { + printk("%s(%d):mgsl_open with invalid line #%d.\n", + __FILE__, __LINE__, line); + return -ENODEV; + } + + /* find the info structure for the specified line */ + info = mgsl_device_list; + while (info && info->line != line) + info = info->next_device; + if (mgsl_paranoia_check(info, tty->name, "mgsl_open")) + return -ENODEV; + tty->driver_data = info; + + return tty_port_install(&info->port, driver, tty); +} + /* mgsl_open() * * Called when a port is opened. Init and enable port. @@ -3374,26 +3397,10 @@ static int block_til_ready(struct tty_struct *tty, struct file * filp, */ static int mgsl_open(struct tty_struct *tty, struct file * filp) { - struct mgsl_struct *info; - int retval, line; + struct mgsl_struct *info = tty->driver_data; unsigned long flags; + int retval; - /* verify range of specified line number */ - line = tty->index; - if (line >= mgsl_device_count) { - printk("%s(%d):mgsl_open with invalid line #%d.\n", - __FILE__,__LINE__,line); - return -ENODEV; - } - - /* find the info structure for the specified line */ - info = mgsl_device_list; - while(info && info->line != line) - info = info->next_device; - if (mgsl_paranoia_check(info, tty->name, "mgsl_open")) - return -ENODEV; - - tty->driver_data = info; info->port.tty = tty; if (debug_level >= DEBUG_LEVEL_INFO) @@ -4297,6 +4304,7 @@ static struct mgsl_struct* mgsl_allocate_device(void) } /* end of mgsl_allocate_device()*/ static const struct tty_operations mgsl_ops = { + .install = mgsl_install, .open = mgsl_open, .close = mgsl_close, .write = mgsl_write, From ee3b48da84261ce37ef339e27e353a512c93ce5f Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:01 +0200 Subject: [PATCH 108/235] TTY: synclinkmp, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/synclinkmp.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index 95fd4e20b96..53429c890a8 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -711,15 +711,11 @@ static void ldisc_receive_buf(struct tty_struct *tty, /* tty callbacks */ -/* Called when a port is opened. Init and enable port. - */ -static int open(struct tty_struct *tty, struct file *filp) +static int install(struct tty_driver *driver, struct tty_struct *tty) { SLMP_INFO *info; - int retval, line; - unsigned long flags; + int line = tty->index; - line = tty->index; if (line >= synclinkmp_device_count) { printk("%s(%d): open with invalid line #%d.\n", __FILE__,__LINE__,line); @@ -727,17 +723,30 @@ static int open(struct tty_struct *tty, struct file *filp) } info = synclinkmp_device_list; - while(info && info->line != line) + while (info && info->line != line) info = info->next_device; if (sanity_check(info, tty->name, "open")) return -ENODEV; - if ( info->init_error ) { + if (info->init_error) { printk("%s(%d):%s device is not allocated, init error=%d\n", - __FILE__,__LINE__,info->device_name,info->init_error); + __FILE__, __LINE__, info->device_name, + info->init_error); return -ENODEV; } tty->driver_data = info; + + return tty_port_install(&info->port, driver, tty); +} + +/* Called when a port is opened. Init and enable port. + */ +static int open(struct tty_struct *tty, struct file *filp) +{ + SLMP_INFO *info = tty->driver_data; + unsigned long flags; + int retval; + info->port.tty = tty; if (debug_level >= DEBUG_LEVEL_INFO) @@ -3881,6 +3890,7 @@ static void device_init(int adapter_num, struct pci_dev *pdev) } static const struct tty_operations ops = { + .install = install, .open = open, .close = close, .write = write, From 9c650ffc27b444f5370ae5e8bc84df76584416a0 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:02 +0200 Subject: [PATCH 109/235] TTY: ircomm_tty, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty Signed-off-by: Jiri Slaby Cc: Samuel Ortiz Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- net/irda/ircomm/ircomm_tty.c | 41 ++++++++++++++++++++++-------------- 1 file changed, 25 insertions(+), 16 deletions(-) diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 7a0d6115d06..96689906b93 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -52,6 +52,8 @@ #include #include +static int ircomm_tty_install(struct tty_driver *driver, + struct tty_struct *tty); static int ircomm_tty_open(struct tty_struct *tty, struct file *filp); static void ircomm_tty_close(struct tty_struct * tty, struct file *filp); static int ircomm_tty_write(struct tty_struct * tty, @@ -82,6 +84,7 @@ static struct tty_driver *driver; static hashbin_t *ircomm_tty = NULL; static const struct tty_operations ops = { + .install = ircomm_tty_install, .open = ircomm_tty_open, .close = ircomm_tty_close, .write = ircomm_tty_write, @@ -374,21 +377,11 @@ static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, return retval; } -/* - * Function ircomm_tty_open (tty, filp) - * - * This routine is called when a particular tty device is opened. This - * routine is mandatory; if this routine is not filled in, the attempted - * open will fail with ENODEV. - */ -static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) + +static int ircomm_tty_install(struct tty_driver *driver, struct tty_struct *tty) { struct ircomm_tty_cb *self; unsigned int line = tty->index; - unsigned long flags; - int ret; - - IRDA_DEBUG(2, "%s()\n", __func__ ); /* Check if instance already exists */ self = hashbin_lock_find(ircomm_tty, line, NULL); @@ -425,14 +418,30 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) tty->termios.c_oflag = 0; /* Insert into hash */ - /* FIXME there is a window from find to here */ hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL); } + + return tty_port_install(&self->port, driver, tty); +} + +/* + * Function ircomm_tty_open (tty, filp) + * + * This routine is called when a particular tty device is opened. This + * routine is mandatory; if this routine is not filled in, the attempted + * open will fail with ENODEV. + */ +static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) +{ + struct ircomm_tty_cb *self = tty->driver_data; + unsigned long flags; + int ret; + + IRDA_DEBUG(2, "%s()\n", __func__ ); + /* ++ is not atomic, so this should be protected - Jean II */ spin_lock_irqsave(&self->port.lock, flags); self->port.count++; - - tty->driver_data = self; spin_unlock_irqrestore(&self->port.lock, flags); tty_port_tty_set(&self->port, tty); @@ -472,7 +481,7 @@ static int ircomm_tty_open(struct tty_struct *tty, struct file *filp) } /* Check if this is a "normal" ircomm device, or an irlpt device */ - if (line < 0x10) { + if (self->line < 0x10) { self->service_type = IRCOMM_3_WIRE | IRCOMM_9_WIRE; self->settings.service_type = IRCOMM_9_WIRE; /* 9 wire as default */ /* Jan Kiszka -> add DSR/RI -> Conform to IrCOMM spec */ From 20cda6f25f9edaa26638fc32e88241af135d712d Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:03 +0200 Subject: [PATCH 110/235] TTY: tty3270, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty In this case ->install is the only thing we want to do. We do not need ->open at all. See the tty->count > 1 check. And since we take a reference in ->install, we need also ->cleanup to drop the reference to a view. Final note, see that we leave raw3270_find_view in place. It is because views are removed even from module_exit. Signed-off-by: Jiri Slaby Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: linux390@de.ibm.com Cc: linux-s390@vger.kernel.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/s390/char/tty3270.c | 31 ++++++++++++++++++++++--------- 1 file changed, 22 insertions(+), 9 deletions(-) diff --git a/drivers/s390/char/tty3270.c b/drivers/s390/char/tty3270.c index f2b8c6c533e..482ee028f84 100644 --- a/drivers/s390/char/tty3270.c +++ b/drivers/s390/char/tty3270.c @@ -842,17 +842,14 @@ static struct raw3270_fn tty3270_fn = { }; /* - * This routine is called whenever a 3270 tty is opened. + * This routine is called whenever a 3270 tty is opened first time. */ -static int -tty3270_open(struct tty_struct *tty, struct file * filp) +static int tty3270_install(struct tty_driver *driver, struct tty_struct *tty) { struct raw3270_view *view; struct tty3270 *tp; int i, rc; - if (tty->count > 1) - return 0; /* Check if the tty3270 is already there. */ view = raw3270_find_view(&tty3270_fn, tty->index + RAW3270_FIRSTMINOR); @@ -865,7 +862,7 @@ tty3270_open(struct tty_struct *tty, struct file * filp) /* why to reassign? */ tty_port_tty_set(&tp->port, tty); tp->inattr = TF_INPUT; - return 0; + return tty_port_install(&tp->port, driver, tty); } if (tty3270_max_index < tty->index + 1) tty3270_max_index = tty->index + 1; @@ -895,7 +892,6 @@ tty3270_open(struct tty_struct *tty, struct file * filp) tty_port_tty_set(&tp->port, tty); tty->low_latency = 0; - tty->driver_data = tp; tty->winsize.ws_row = tp->view.rows - 2; tty->winsize.ws_col = tp->view.cols; @@ -915,6 +911,15 @@ tty3270_open(struct tty_struct *tty, struct file * filp) kbd_ascebc(tp->kbd, tp->view.ascebc); raw3270_activate_view(&tp->view); + + rc = tty_port_install(&tp->port, driver, tty); + if (rc) { + raw3270_put_view(&tp->view); + return rc; + } + + tty->driver_data = tp; + return 0; } @@ -932,10 +937,17 @@ tty3270_close(struct tty_struct *tty, struct file * filp) if (tp) { tty->driver_data = NULL; tty_port_tty_set(&tp->port, NULL); - raw3270_put_view(&tp->view); } } +static void tty3270_cleanup(struct tty_struct *tty) +{ + struct tty3270 *tp = tty->driver_data; + + if (tp) + raw3270_put_view(&tp->view); +} + /* * We always have room. */ @@ -1737,7 +1749,8 @@ static long tty3270_compat_ioctl(struct tty_struct *tty, #endif static const struct tty_operations tty3270_ops = { - .open = tty3270_open, + .install = tty3270_install, + .cleanup = tty3270_cleanup, .close = tty3270_close, .write = tty3270_write, .put_char = tty3270_put_char, From bdb498c20040616e94b05c31a0ceb3e134b7e829 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:04 +0200 Subject: [PATCH 111/235] TTY: hvc_console, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty Since we take a reference to a port in ->install, we need also ->cleanup to drop that reference. Signed-off-by: Jiri Slaby Cc: linuxppc-dev@lists.ozlabs.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvc_console.c | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-) diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 2d691eb7c40..7f80f15681c 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -299,20 +299,33 @@ static void hvc_unthrottle(struct tty_struct *tty) hvc_kick(); } +static int hvc_install(struct tty_driver *driver, struct tty_struct *tty) +{ + struct hvc_struct *hp; + int rc; + + /* Auto increments kref reference if found. */ + if (!(hp = hvc_get_by_index(tty->index))) + return -ENODEV; + + tty->driver_data = hp; + + rc = tty_port_install(&hp->port, driver, tty); + if (rc) + tty_port_put(&hp->port); + return rc; +} + /* * The TTY interface won't be used until after the vio layer has exposed the vty * adapter to the kernel. */ static int hvc_open(struct tty_struct *tty, struct file * filp) { - struct hvc_struct *hp; + struct hvc_struct *hp = tty->driver_data; unsigned long flags; int rc = 0; - /* Auto increments kref reference if found. */ - if (!(hp = hvc_get_by_index(tty->index))) - return -ENODEV; - spin_lock_irqsave(&hp->port.lock, flags); /* Check and then increment for fast path open. */ if (hp->port.count++ > 0) { @@ -322,7 +335,6 @@ static int hvc_open(struct tty_struct *tty, struct file * filp) } /* else count == 0 */ spin_unlock_irqrestore(&hp->port.lock, flags); - tty->driver_data = hp; tty_port_tty_set(&hp->port, tty); if (hp->ops->notifier_add) @@ -389,6 +401,11 @@ static void hvc_close(struct tty_struct *tty, struct file * filp) hp->vtermno, hp->port.count); spin_unlock_irqrestore(&hp->port.lock, flags); } +} + +static void hvc_cleanup(struct tty_struct *tty) +{ + struct hvc_struct *hp = tty->driver_data; tty_port_put(&hp->port); } @@ -792,8 +809,10 @@ static void hvc_poll_put_char(struct tty_driver *driver, int line, char ch) #endif static const struct tty_operations hvc_ops = { + .install = hvc_install, .open = hvc_open, .close = hvc_close, + .cleanup = hvc_cleanup, .write = hvc_write, .hangup = hvc_hangup, .unthrottle = hvc_unthrottle, From 97d150898592be8d5381ebc8d435526df38a2791 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:05 +0200 Subject: [PATCH 112/235] TTY: hvcs, clean hvcs_open a bit Make the code of hvcs_open a bit more readable by: - moving all assignments out of if's - redoing fail paths so that corresponding pieces are nearby - we need only one of retval and rc Signed-off-by: Jiri Slaby Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 32 +++++++++++++++++--------------- 1 file changed, 17 insertions(+), 15 deletions(-) diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index d56788c8397..6f5c3be0f49 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1109,11 +1109,10 @@ static struct hvcs_struct *hvcs_get_by_index(int index) static int hvcs_open(struct tty_struct *tty, struct file *filp) { struct hvcs_struct *hvcsd; - int rc, retval = 0; - unsigned long flags; - unsigned int irq; struct vio_dev *vdev; - unsigned long unit_address; + unsigned long unit_address, flags; + unsigned int irq; + int retval; if (tty->driver_data) goto fast_open; @@ -1122,7 +1121,8 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) * Is there a vty-server that shares the same index? * This function increments the kref index. */ - if (!(hvcsd = hvcs_get_by_index(tty->index))) { + hvcsd = hvcs_get_by_index(tty->index); + if (!hvcsd) { printk(KERN_WARNING "HVCS: open failed, no device associated" " with tty->index %d.\n", tty->index); return -ENODEV; @@ -1130,9 +1130,14 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) spin_lock_irqsave(&hvcsd->lock, flags); - if (hvcsd->connected == 0) - if ((retval = hvcs_partner_connect(hvcsd))) - goto error_release; + if (hvcsd->connected == 0) { + retval = hvcs_partner_connect(hvcsd); + if (retval) { + spin_unlock_irqrestore(&hvcsd->lock, flags); + printk(KERN_WARNING "HVCS: partner connect failed.\n"); + goto err_put; + } + } hvcsd->port.count = 1; hvcsd->port.tty = tty; @@ -1155,10 +1160,10 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) * This must be done outside of the spinlock because it requests irqs * and will grab the spinlock and free the connection if it fails. */ - if (((rc = hvcs_enable_device(hvcsd, unit_address, irq, vdev)))) { - tty_port_put(&hvcsd->port); + retval = hvcs_enable_device(hvcsd, unit_address, irq, vdev); + if (retval) { printk(KERN_WARNING "HVCS: enable device failed.\n"); - return rc; + goto err_put; } goto open_success; @@ -1179,12 +1184,9 @@ open_success: hvcsd->vdev->unit_address ); return 0; - -error_release: - spin_unlock_irqrestore(&hvcsd->lock, flags); +err_put: tty_port_put(&hvcsd->port); - printk(KERN_WARNING "HVCS: partner connect failed.\n"); return retval; } From 27bf7c43a19c66bdc96ee3ee5a67e3bc2d601736 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 7 Aug 2012 21:48:06 +0200 Subject: [PATCH 113/235] TTY: hvcs, add tty install This has two outcomes: * we give the TTY layer a tty_port * we do not find the info structure every time open is called on that tty >From now on, we only increase the reference count in ->install (and decrease in ->cleanup). Signed-off-by: Jiri Slaby Cc: linuxppc-dev@lists.ozlabs.org Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvcs.c | 52 +++++++++++++++++++++++++++--------------- 1 file changed, 33 insertions(+), 19 deletions(-) diff --git a/drivers/tty/hvc/hvcs.c b/drivers/tty/hvc/hvcs.c index 6f5c3be0f49..cab5c7adf8e 100644 --- a/drivers/tty/hvc/hvcs.c +++ b/drivers/tty/hvc/hvcs.c @@ -1102,11 +1102,7 @@ static struct hvcs_struct *hvcs_get_by_index(int index) return NULL; } -/* - * This is invoked via the tty_open interface when a user app connects to the - * /dev node. - */ -static int hvcs_open(struct tty_struct *tty, struct file *filp) +static int hvcs_install(struct tty_driver *driver, struct tty_struct *tty) { struct hvcs_struct *hvcsd; struct vio_dev *vdev; @@ -1114,9 +1110,6 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) unsigned int irq; int retval; - if (tty->driver_data) - goto fast_open; - /* * Is there a vty-server that shares the same index? * This function increments the kref index. @@ -1139,7 +1132,7 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) } } - hvcsd->port.count = 1; + hvcsd->port.count = 0; hvcsd->port.tty = tty; tty->driver_data = hvcsd; @@ -1166,28 +1159,42 @@ static int hvcs_open(struct tty_struct *tty, struct file *filp) goto err_put; } - goto open_success; + retval = tty_port_install(&hvcsd->port, driver, tty); + if (retval) + goto err_irq; -fast_open: - hvcsd = tty->driver_data; + return 0; +err_irq: + spin_lock_irqsave(&hvcsd->lock, flags); + vio_disable_interrupts(hvcsd->vdev); + spin_unlock_irqrestore(&hvcsd->lock, flags); + free_irq(irq, hvcsd); +err_put: + tty_port_put(&hvcsd->port); + + return retval; +} + +/* + * This is invoked via the tty_open interface when a user app connects to the + * /dev node. + */ +static int hvcs_open(struct tty_struct *tty, struct file *filp) +{ + struct hvcs_struct *hvcsd = tty->driver_data; + unsigned long flags; spin_lock_irqsave(&hvcsd->lock, flags); - tty_port_get(&hvcsd->port); hvcsd->port.count++; hvcsd->todo_mask |= HVCS_SCHED_READ; spin_unlock_irqrestore(&hvcsd->lock, flags); -open_success: hvcs_kick(); printk(KERN_INFO "HVCS: vty-server@%X connection opened.\n", hvcsd->vdev->unit_address ); return 0; -err_put: - tty_port_put(&hvcsd->port); - - return retval; } static void hvcs_close(struct tty_struct *tty, struct file *filp) @@ -1238,7 +1245,6 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) tty->driver_data = NULL; free_irq(irq, hvcsd); - tty_port_put(&hvcsd->port); return; } else if (hvcsd->port.count < 0) { printk(KERN_ERR "HVCS: vty-server@%X open_count: %d" @@ -1247,6 +1253,12 @@ static void hvcs_close(struct tty_struct *tty, struct file *filp) } spin_unlock_irqrestore(&hvcsd->lock, flags); +} + +static void hvcs_cleanup(struct tty_struct * tty) +{ + struct hvcs_struct *hvcsd = tty->driver_data; + tty_port_put(&hvcsd->port); } @@ -1433,8 +1445,10 @@ static int hvcs_chars_in_buffer(struct tty_struct *tty) } static const struct tty_operations hvcs_ops = { + .install = hvcs_install, .open = hvcs_open, .close = hvcs_close, + .cleanup = hvcs_cleanup, .hangup = hvcs_hangup, .write = hvcs_write, .write_room = hvcs_write_room, From a342ca1c78627c3a8b2a8c4e6d5f6ab1b88e6169 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Mon, 13 Aug 2012 10:18:09 +0200 Subject: [PATCH 114/235] TTY: mxser, fix invalid module_parm permissions 444 means 0674 and we do not definitely want that. Use S_IRUGO which is much more safer. Signed-off-by: Jiri Slaby Reported-by: Rusty Russell Signed-off-by: Greg Kroah-Hartman --- drivers/tty/mxser.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index 8bc265154ad..bb2da4ca825 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -2338,7 +2338,7 @@ static struct tty_port_operations mxser_port_ops = { */ static bool allow_overlapping_vector; -module_param(allow_overlapping_vector, bool, 444); +module_param(allow_overlapping_vector, bool, S_IRUGO); MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)"); static bool mxser_overlapping_vector(struct mxser_board *brd) From a33ba827460cdab644e907fc0c740dc7fde56c17 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 14 Aug 2012 10:23:08 +0200 Subject: [PATCH 115/235] TTY: synclink_cs, fix build MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Commit "TTY: synclink_cs, use dynamic tty devices" added a call to tty_port_register_device with a proper device as the last argument. But it was not correct and it causes build failures: synclink_cs.c: In function ‘mgslpc_add_device’: synclink_cs.c:2735:16: error: request for member ‘dev’ in something not a structure or union info->p_dev is a pointer, so act as that. I wonder why my build scripts did not notice. I have to re-check them. Signed-off-by: Jiri Slaby Reported-by: Fengguang Wu Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 923c3a47db0..d9335ae1fad 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2732,7 +2732,7 @@ static void mgslpc_add_device(MGSLPC_INFO *info) hdlcdev_init(info); #endif tty_port_register_device(&info->port, serial_driver, info->line, - &info->p_dev.dev); + &info->p_dev->dev); } static void mgslpc_remove_device(MGSLPC_INFO *remove_info) From 640de636a1f149a92fe54f564ce931ec6b8418c6 Mon Sep 17 00:00:00 2001 From: David Daney Date: Tue, 14 Aug 2012 09:42:39 -0700 Subject: [PATCH 116/235] MIPS: OCTEON: Fix breakage due to 8250 changes. The changes in linux-next removing serial8250_register_port() cause OCTEON to fail to compile. Lets make OCTEON use the new serial8250_register_8250_port() instead. Signed-off-by: David Daney Cc: Alan Cox Acked-by: Ralf Baechle Signed-off-by: Greg Kroah-Hartman --- arch/mips/cavium-octeon/serial.c | 30 +++++++++++++++--------------- 1 file changed, 15 insertions(+), 15 deletions(-) diff --git a/arch/mips/cavium-octeon/serial.c b/arch/mips/cavium-octeon/serial.c index 138b2216b4f..569f41bdcc4 100644 --- a/arch/mips/cavium-octeon/serial.c +++ b/arch/mips/cavium-octeon/serial.c @@ -47,40 +47,40 @@ static int __devinit octeon_serial_probe(struct platform_device *pdev) { int irq, res; struct resource *res_mem; - struct uart_port port; + struct uart_8250_port up; /* All adaptors have an irq. */ irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; - memset(&port, 0, sizeof(port)); + memset(&up, 0, sizeof(up)); - port.flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; - port.type = PORT_OCTEON; - port.iotype = UPIO_MEM; - port.regshift = 3; - port.dev = &pdev->dev; + up.port.flags = ASYNC_SKIP_TEST | UPF_SHARE_IRQ | UPF_FIXED_TYPE; + up.port.type = PORT_OCTEON; + up.port.iotype = UPIO_MEM; + up.port.regshift = 3; + up.port.dev = &pdev->dev; if (octeon_is_simulation()) /* Make simulator output fast*/ - port.uartclk = 115200 * 16; + up.port.uartclk = 115200 * 16; else - port.uartclk = octeon_get_io_clock_rate(); + up.port.uartclk = octeon_get_io_clock_rate(); - port.serial_in = octeon_serial_in; - port.serial_out = octeon_serial_out; - port.irq = irq; + up.port.serial_in = octeon_serial_in; + up.port.serial_out = octeon_serial_out; + up.port.irq = irq; res_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res_mem == NULL) { dev_err(&pdev->dev, "found no memory resource\n"); return -ENXIO; } - port.mapbase = res_mem->start; - port.membase = ioremap(res_mem->start, resource_size(res_mem)); + up.port.mapbase = res_mem->start; + up.port.membase = ioremap(res_mem->start, resource_size(res_mem)); - res = serial8250_register_port(&port); + res = serial8250_register_8250_port(&up); return res >= 0 ? 0 : res; } From 386d95b3ad6f6dad61d0be379873dca66595c1e4 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Tue, 14 Aug 2012 08:47:35 +0200 Subject: [PATCH 117/235] drivers/tty/moxa.c: fix error return code Convert a 0 error return code to a negative one, as returned elsewhere in the function. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ identifier ret; expression e,e1,e2,e3,e4,x; @@ ( if (\(ret != 0\|ret < 0\) || ...) { ... return ...; } | ret = 0 ) ... when != ret = e1 *x = \(kmalloc\|kzalloc\|kcalloc\|devm_kzalloc\|ioremap\|ioremap_nocache\|devm_ioremap\|devm_ioremap_nocache\)(...); ... when != x = e2 when != ret = e3 *if (x == NULL || ...) { ... when != ret = e4 * return ret; } // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/tty/moxa.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 9dffc724d46..3b17a044c21 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -977,6 +977,7 @@ static int __devinit moxa_pci_probe(struct pci_dev *pdev, board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000); if (board->basemem == NULL) { dev_err(&pdev->dev, "can't remap io space 2\n"); + retval = -ENOMEM; goto err_reg; } From 6683549e4ba050cddd8fa88c3f1e53b825fdcb6d Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 16 Aug 2012 12:01:33 +0100 Subject: [PATCH 118/235] 8250: add AgeStar AS-PRS2-009 Signed-off-by: Alan Cox Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=22502 Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 62e10fe747a..ad4bb8dec36 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1194,6 +1194,8 @@ pci_xr17c154_setup(struct serial_private *priv, #define PCIE_DEVICE_ID_NEO_2_OX_IBM 0x00F6 #define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001 #define PCI_DEVICE_ID_INTEL_PATSBURG_KT 0x1d3d +#define PCI_VENDOR_ID_AGESTAR 0x5372 +#define PCI_DEVICE_ID_AGESTAR_9375 0x6872 #define PCI_VENDOR_ID_ASIX 0x9710 /* Unknown vendors/cards - this should not be in linux/pci_ids.h */ @@ -4188,6 +4190,12 @@ static struct pci_device_id serial_pci_tbl[] = { PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_omegapci }, + /* + * AgeStar as-prs2-009 + */ + { PCI_VENDOR_ID_AGESTAR, PCI_DEVICE_ID_AGESTAR_9375, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, pbn_b0_bt_2_115200 }, /* * These entries match devices with class COMMUNICATION_SERIAL, * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL From e9490e93c1978b6669f3e993caa3189be13ce459 Mon Sep 17 00:00:00 2001 From: Stanislav Kozina Date: Thu, 16 Aug 2012 12:01:47 +0100 Subject: [PATCH 119/235] Remove BUG_ON from n_tty_read() Change the BUG_ON to WARN_ON and return in case of tty->read_buf==NULL. We want to track a couple of long standing reports of this but at the same time we can avoid killing the box. Signed-off-by: Stanislav Kozina Signed-off-by: Alan Cox Cc: Horses Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_tty.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 6259242b785..8c0b7b42319 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1742,7 +1742,8 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file, do_it_again: - BUG_ON(!tty->read_buf); + if (WARN_ON(!tty->read_buf)) + return -EAGAIN; c = job_control(tty, file); if (c < 0) From 7e8ac7b23b67416700dfb8b4136a4e81ce675b48 Mon Sep 17 00:00:00 2001 From: xiaojin Date: Mon, 13 Aug 2012 13:43:15 +0100 Subject: [PATCH 120/235] n_gsm.c: Implement 3GPP27.010 DLC start-up procedure in MUX In 3GPP27.010 5.8.1, it defined: The TE multiplexer initiates the establishment of the multiplexer control channel by sending a SABM frame on DLCI 0 using the procedures of clause 5.4.1. Once the multiplexer channel is established other DLCs may be established using the procedures of clause 5.4.1. This patch implement 5.8.1 in MUX level, it make sure DLC0 is the first channel to be setup. [or for those not familiar with the specification: it was possible to try and open a data connection while the control channel was not yet fully open, which is a spec violation and confuses some modems] Signed-off-by: xiaojin Tested-by: Yin, Fengwei [tweaked the order we check things and error code] Signed-off-by: Alan Cox Cc: The Horsebox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 3778687f748..0988aaaf267 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -2889,6 +2889,10 @@ static int gsmtty_install(struct tty_driver *driver, struct tty_struct *tty) gsm = gsm_mux[mux]; if (gsm->dead) return -EL2HLT; + /* If DLCI 0 is not yet fully open return an error. This is ok from a locking + perspective as we don't have to worry about this if DLCI0 is lost */ + if (gsm->dlci[0] && gsm->dlci[0]->state != DLCI_OPEN) + return -EL2NSYNC; dlci = gsm->dlci[line]; if (dlci == NULL) { alloc = true; From 192b6041e75bb4a2aae73834037038cea139a92d Mon Sep 17 00:00:00 2001 From: Russ Gorby Date: Mon, 13 Aug 2012 13:43:36 +0100 Subject: [PATCH 121/235] n_gsm: uplink SKBs accumulate on list gsm_dlci_data_kick will not call any output function if tx_bytes > THRESH_LO furthermore it will call the output function only once if tx_bytes == 0 If the size of the IP writes are on the order of THRESH_LO we can get into a situation where skbs accumulate on the outbound list being starved for events to call the output function. gsm_dlci_data_kick now calls the sweep function when tx_bytes==0 Signed-off-by: Russ Gorby Tested-by: Kappel, LaurentX Signed-off-by: Alan Cox Cc: Hay and Water Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 0988aaaf267..c028f357024 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -971,16 +971,19 @@ static void gsm_dlci_data_sweep(struct gsm_mux *gsm) static void gsm_dlci_data_kick(struct gsm_dlci *dlci) { unsigned long flags; + int sweep; spin_lock_irqsave(&dlci->gsm->tx_lock, flags); /* If we have nothing running then we need to fire up */ + sweep = (dlci->gsm->tx_bytes < TX_THRESH_LO); if (dlci->gsm->tx_bytes == 0) { if (dlci->net) gsm_dlci_data_output_framed(dlci->gsm, dlci); else gsm_dlci_data_output(dlci->gsm, dlci); - } else if (dlci->gsm->tx_bytes < TX_THRESH_LO) - gsm_dlci_data_sweep(dlci->gsm); + } + if (sweep) + gsm_dlci_data_sweep(dlci->gsm); spin_unlock_irqrestore(&dlci->gsm->tx_lock, flags); } From c01af4fec2c8f303d6b3354d44308d9e6bef8026 Mon Sep 17 00:00:00 2001 From: Frederic Berat Date: Mon, 13 Aug 2012 13:43:58 +0100 Subject: [PATCH 122/235] n_gsm : Flow control handling in Mux driver - Correcting handling of FCon/FCoff in order to respect 27.010 spec - Consider FCon/off will overide all dlci flow control except for dlci0 as we must be able to send control frames. - Dlci constipated handling according to FC, RTC and RTR values. - Modifying gsm_dlci_data_kick and gsm_dlci_data_sweep according to dlci constipated value Signed-off-by: Frederic Berat Signed-off-by: Russ Gorby Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 79 ++++++++++++++++++++++++++++++++------------- 1 file changed, 57 insertions(+), 22 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index c028f357024..db15b562a29 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -673,6 +673,8 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, * * The tty device has called us to indicate that room has appeared in * the transmit queue. Ram more data into the pipe if we have any + * If we have been flow-stopped by a CMD_FCOFF, then we can only + * send messages on DLCI0 until CMD_FCON * * FIXME: lock against link layer control transmissions */ @@ -680,15 +682,19 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, static void gsm_data_kick(struct gsm_mux *gsm) { struct gsm_msg *msg = gsm->tx_head; + struct gsm_msg *free_msg; int len; int skip_sof = 0; - /* FIXME: We need to apply this solely to data messages */ - if (gsm->constipated) - return; - - while (gsm->tx_head != NULL) { - msg = gsm->tx_head; + while (msg) { + if (gsm->constipated && msg->addr) { + msg = msg->next; + continue; + } + if (gsm->dlci[msg->addr]->constipated) { + msg = msg->next; + continue; + } if (gsm->encoding != 0) { gsm->txframe[0] = GSM1_SOF; len = gsm_stuff_frame(msg->data, @@ -711,15 +717,19 @@ static void gsm_data_kick(struct gsm_mux *gsm) len - skip_sof) < 0) break; /* FIXME: Can eliminate one SOF in many more cases */ - gsm->tx_head = msg->next; - if (gsm->tx_head == NULL) - gsm->tx_tail = NULL; gsm->tx_bytes -= msg->len; - kfree(msg); /* For a burst of frames skip the extra SOF within the burst */ skip_sof = 1; + + if (gsm->tx_head == msg) + gsm->tx_head = msg->next; + free_msg = msg; + msg = msg->next; + kfree(free_msg); } + if (!gsm->tx_head) + gsm->tx_tail = NULL; } /** @@ -738,6 +748,8 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) u8 *dp = msg->data; u8 *fcs = dp + msg->len; + WARN_ONCE(dlci->constipated, "%s: queueing from a constipated DLCI", + __func__); /* Fill in the header */ if (gsm->encoding == 0) { if (msg->len < 128) @@ -944,6 +956,9 @@ static void gsm_dlci_data_sweep(struct gsm_mux *gsm) break; dlci = gsm->dlci[i]; if (dlci == NULL || dlci->constipated) { + if (dlci && (debug & 0x20)) + pr_info("%s: DLCI %d is constipated", + __func__, i); i++; continue; } @@ -973,6 +988,13 @@ static void gsm_dlci_data_kick(struct gsm_dlci *dlci) unsigned long flags; int sweep; + if (dlci->constipated) { + if (debug & 0x20) + pr_info("%s: DLCI %d is constipated", + __func__, dlci->addr); + return; + } + spin_lock_irqsave(&dlci->gsm->tx_lock, flags); /* If we have nothing running then we need to fire up */ sweep = (dlci->gsm->tx_bytes < TX_THRESH_LO); @@ -1030,6 +1052,7 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, { int mlines = 0; u8 brk = 0; + int fc; /* The modem status command can either contain one octet (v.24 signals) or two octets (v.24 signals + break signals). The length field will @@ -1041,19 +1064,27 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, else { brk = modem & 0x7f; modem = (modem >> 7) & 0x7f; - }; + } /* Flow control/ready to communicate */ - if (modem & MDM_FC) { + fc = (modem & MDM_FC) || !(modem & MDM_RTR); + if (fc && !dlci->constipated) { + if (debug & 0x20) + pr_info("%s: DLCI %d START constipated (tx_bytes=%d)", + __func__, dlci->addr, dlci->gsm->tx_bytes); /* Need to throttle our output on this device */ dlci->constipated = 1; - } - if (modem & MDM_RTC) { - mlines |= TIOCM_DSR | TIOCM_DTR; + } else if (!fc && dlci->constipated) { + if (debug & 0x20) + pr_info("%s: DLCI %d END constipated (tx_bytes=%d)", + __func__, dlci->addr, dlci->gsm->tx_bytes); dlci->constipated = 0; gsm_dlci_data_kick(dlci); } + /* Map modem bits */ + if (modem & MDM_RTC) + mlines |= TIOCM_DSR | TIOCM_DTR; if (modem & MDM_RTR) mlines |= TIOCM_RTS | TIOCM_CTS; if (modem & MDM_IC) @@ -1209,17 +1240,21 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, gsm_control_reply(gsm, CMD_TEST, data, clen); break; case CMD_FCON: - /* Modem wants us to STFU */ - gsm->constipated = 1; - gsm_control_reply(gsm, CMD_FCON, NULL, 0); - break; - case CMD_FCOFF: /* Modem can accept data again */ + if (debug & 0x20) + pr_info("%s: GSM END constipation", __func__); gsm->constipated = 0; - gsm_control_reply(gsm, CMD_FCOFF, NULL, 0); + gsm_control_reply(gsm, CMD_FCON, NULL, 0); /* Kick the link in case it is idling */ gsm_data_kick(gsm); break; + case CMD_FCOFF: + /* Modem wants us to STFU */ + if (debug & 0x20) + pr_info("%s: GSM START constipation", __func__); + gsm->constipated = 1; + gsm_control_reply(gsm, CMD_FCOFF, NULL, 0); + break; case CMD_MSC: /* Out of band modem line change indicator for a DLCI */ gsm_control_modem(gsm, data, clen); @@ -2276,7 +2311,7 @@ static void gsmld_receive_buf(struct tty_struct *tty, const unsigned char *cp, gsm->error(gsm, *dp, flags); break; default: - WARN_ONCE("%s: unknown flag %d\n", + WARN_ONCE(1, "%s: unknown flag %d\n", tty_name(tty, buf), flags); break; } From 10c6c383e43565c9c6ec07ff8eb2825f8091bdf0 Mon Sep 17 00:00:00 2001 From: "samix.lebsir" Date: Mon, 13 Aug 2012 13:44:22 +0100 Subject: [PATCH 123/235] char: n_gsm: remove message filtering for contipated DLCI The design of uplink flow control in the mux driver is that for constipated channels data will backup into the per-channel fifos, and any messages that make it to the outbound message queue will still go out. Code was added to also stop messages that were in the outbound queue but this requires filtering through all the messages on the queue for stopped dlcis and changes some of the mux logic unneccessarily. The message fiiltering was removed to be in line w/ the original design as the message filtering does not provide any solution. Extra debug messages used during investigation were also removed. Signed-off-by: samix.lebsir Signed-off-by: Alan Cox Cc: Dressage Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 25 +------------------------ 1 file changed, 1 insertion(+), 24 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index db15b562a29..5f68f2a70c5 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -691,10 +691,6 @@ static void gsm_data_kick(struct gsm_mux *gsm) msg = msg->next; continue; } - if (gsm->dlci[msg->addr]->constipated) { - msg = msg->next; - continue; - } if (gsm->encoding != 0) { gsm->txframe[0] = GSM1_SOF; len = gsm_stuff_frame(msg->data, @@ -748,8 +744,6 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) u8 *dp = msg->data; u8 *fcs = dp + msg->len; - WARN_ONCE(dlci->constipated, "%s: queueing from a constipated DLCI", - __func__); /* Fill in the header */ if (gsm->encoding == 0) { if (msg->len < 128) @@ -956,9 +950,6 @@ static void gsm_dlci_data_sweep(struct gsm_mux *gsm) break; dlci = gsm->dlci[i]; if (dlci == NULL || dlci->constipated) { - if (dlci && (debug & 0x20)) - pr_info("%s: DLCI %d is constipated", - __func__, i); i++; continue; } @@ -988,12 +979,8 @@ static void gsm_dlci_data_kick(struct gsm_dlci *dlci) unsigned long flags; int sweep; - if (dlci->constipated) { - if (debug & 0x20) - pr_info("%s: DLCI %d is constipated", - __func__, dlci->addr); + if (dlci->constipated) return; - } spin_lock_irqsave(&dlci->gsm->tx_lock, flags); /* If we have nothing running then we need to fire up */ @@ -1069,15 +1056,9 @@ static void gsm_process_modem(struct tty_struct *tty, struct gsm_dlci *dlci, /* Flow control/ready to communicate */ fc = (modem & MDM_FC) || !(modem & MDM_RTR); if (fc && !dlci->constipated) { - if (debug & 0x20) - pr_info("%s: DLCI %d START constipated (tx_bytes=%d)", - __func__, dlci->addr, dlci->gsm->tx_bytes); /* Need to throttle our output on this device */ dlci->constipated = 1; } else if (!fc && dlci->constipated) { - if (debug & 0x20) - pr_info("%s: DLCI %d END constipated (tx_bytes=%d)", - __func__, dlci->addr, dlci->gsm->tx_bytes); dlci->constipated = 0; gsm_dlci_data_kick(dlci); } @@ -1241,8 +1222,6 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, break; case CMD_FCON: /* Modem can accept data again */ - if (debug & 0x20) - pr_info("%s: GSM END constipation", __func__); gsm->constipated = 0; gsm_control_reply(gsm, CMD_FCON, NULL, 0); /* Kick the link in case it is idling */ @@ -1250,8 +1229,6 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, break; case CMD_FCOFF: /* Modem wants us to STFU */ - if (debug & 0x20) - pr_info("%s: GSM START constipation", __func__); gsm->constipated = 1; gsm_control_reply(gsm, CMD_FCOFF, NULL, 0); break; From 5e44708f75b0f8712da715d6babb0c21089b2317 Mon Sep 17 00:00:00 2001 From: Russ Gorby Date: Mon, 13 Aug 2012 13:44:40 +0100 Subject: [PATCH 124/235] n_gsm: added interlocking for gsm_data_lock for certain code paths There were some locking holes in the management of the MUX's message queue for 2 code paths: 1) gsmld_write_wakeup 2) receipt of CMD_FCON flow-control message In both cases gsm_data_kick is called w/o locking so it can collide with other other instances of gsm_data_kick (pulling messages tx_tail) or potentially other instances of __gsm_data_queu (adding messages to tx_head) Changed to take the tx_lock in these 2 cases Signed-off-by: Russ Gorby Tested-by: Yin, Fengwei Signed-off-by: Alan Cox Cc: Riding School Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 5f68f2a70c5..0d93e51cb23 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -1205,6 +1205,8 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, u8 *data, int clen) { u8 buf[1]; + unsigned long flags; + switch (command) { case CMD_CLD: { struct gsm_dlci *dlci = gsm->dlci[0]; @@ -1225,7 +1227,9 @@ static void gsm_control_message(struct gsm_mux *gsm, unsigned int command, gsm->constipated = 0; gsm_control_reply(gsm, CMD_FCON, NULL, 0); /* Kick the link in case it is idling */ + spin_lock_irqsave(&gsm->tx_lock, flags); gsm_data_kick(gsm); + spin_unlock_irqrestore(&gsm->tx_lock, flags); break; case CMD_FCOFF: /* Modem wants us to STFU */ @@ -2392,12 +2396,12 @@ static void gsmld_write_wakeup(struct tty_struct *tty) /* Queue poll */ clear_bit(TTY_DO_WRITE_WAKEUP, &tty->flags); + spin_lock_irqsave(&gsm->tx_lock, flags); gsm_data_kick(gsm); if (gsm->tx_bytes < TX_THRESH_LO) { - spin_lock_irqsave(&gsm->tx_lock, flags); gsm_dlci_data_sweep(gsm); - spin_unlock_irqrestore(&gsm->tx_lock, flags); } + spin_unlock_irqrestore(&gsm->tx_lock, flags); } /** From b4338e1efc339986cf6c0a3652906e914a86e2d3 Mon Sep 17 00:00:00 2001 From: Russ Gorby Date: Mon, 13 Aug 2012 13:44:59 +0100 Subject: [PATCH 125/235] n_gsm: avoid accessing freed memory during CMD_FCOFF condition gsm_data_kick was recently modified to allow messages on the tx queue bound for DLCI0 to flow even during FCOFF conditions. Unfortunately we introduced a bug discovered by code inspection where subsequent list traversers can access freed memory if the DLCI0 messages were not all at the head of the list. Replaced singly linked tx list w/ a list_head and used provided interfaces for traversing and deleting members. Signed-off-by: Russ Gorby Tested-by: Yin, Fengwei Signed-off-by: Alan Cox Cc: Riding School Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 40 +++++++++++++--------------------------- 1 file changed, 13 insertions(+), 27 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 0d93e51cb23..6f4f8d3654d 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -108,7 +108,7 @@ struct gsm_mux_net { */ struct gsm_msg { - struct gsm_msg *next; + struct list_head list; u8 addr; /* DLCI address + flags */ u8 ctrl; /* Control byte + flags */ unsigned int len; /* Length of data block (can be zero) */ @@ -245,8 +245,7 @@ struct gsm_mux { unsigned int tx_bytes; /* TX data outstanding */ #define TX_THRESH_HI 8192 #define TX_THRESH_LO 2048 - struct gsm_msg *tx_head; /* Pending data packets */ - struct gsm_msg *tx_tail; + struct list_head tx_list; /* Pending data packets */ /* Control messages */ struct timer_list t2_timer; /* Retransmit timer for commands */ @@ -663,7 +662,7 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, m->len = len; m->addr = addr; m->ctrl = ctrl; - m->next = NULL; + INIT_LIST_HEAD(&m->list); return m; } @@ -681,16 +680,13 @@ static struct gsm_msg *gsm_data_alloc(struct gsm_mux *gsm, u8 addr, int len, static void gsm_data_kick(struct gsm_mux *gsm) { - struct gsm_msg *msg = gsm->tx_head; - struct gsm_msg *free_msg; + struct gsm_msg *msg, *nmsg; int len; int skip_sof = 0; - while (msg) { - if (gsm->constipated && msg->addr) { - msg = msg->next; + list_for_each_entry_safe(msg, nmsg, &gsm->tx_list, list) { + if (gsm->constipated && msg->addr) continue; - } if (gsm->encoding != 0) { gsm->txframe[0] = GSM1_SOF; len = gsm_stuff_frame(msg->data, @@ -718,14 +714,9 @@ static void gsm_data_kick(struct gsm_mux *gsm) burst */ skip_sof = 1; - if (gsm->tx_head == msg) - gsm->tx_head = msg->next; - free_msg = msg; - msg = msg->next; - kfree(free_msg); + list_del(&msg->list); + kfree(msg); } - if (!gsm->tx_head) - gsm->tx_tail = NULL; } /** @@ -774,11 +765,7 @@ static void __gsm_data_queue(struct gsm_dlci *dlci, struct gsm_msg *msg) msg->data = dp; /* Add to the actual output queue */ - if (gsm->tx_tail) - gsm->tx_tail->next = msg; - else - gsm->tx_head = msg; - gsm->tx_tail = msg; + list_add_tail(&msg->list, &gsm->tx_list); gsm->tx_bytes += msg->len; gsm_data_kick(gsm); } @@ -2026,7 +2013,7 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) { int i; struct gsm_dlci *dlci = gsm->dlci[0]; - struct gsm_msg *txq; + struct gsm_msg *txq, *utxq; struct gsm_control *gc; gsm->dead = 1; @@ -2061,11 +2048,9 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) if (gsm->dlci[i]) gsm_dlci_release(gsm->dlci[i]); /* Now wipe the queues */ - for (txq = gsm->tx_head; txq != NULL; txq = gsm->tx_head) { - gsm->tx_head = txq->next; + list_for_each_entry_safe(txq, ntxq, &gsm->tx_list, list) kfree(txq); - } - gsm->tx_tail = NULL; + INIT_LIST_HEAD(&gsm->tx_list); } EXPORT_SYMBOL_GPL(gsm_cleanup_mux); @@ -2176,6 +2161,7 @@ struct gsm_mux *gsm_alloc_mux(void) } spin_lock_init(&gsm->lock); kref_init(&gsm->ref); + INIT_LIST_HEAD(&gsm->tx_list); gsm->t1 = T1; gsm->t2 = T2; From 329e56780e514a7ab607bcb51a52ab0dc2669414 Mon Sep 17 00:00:00 2001 From: Russ Gorby Date: Mon, 13 Aug 2012 13:45:15 +0100 Subject: [PATCH 126/235] n_gsm: replace kfree_skb w/ appropriate dev_* versions Drivers are supposed to use the dev_* versions of the kfree_skb interfaces. In a couple of cases we were called with IRQs disabled as well which kfree_skb() does not expect. Replaced kfree_skb calls w/ dev_kfree_skb and dev_kfree_skb_any Signed-off-by: Russ Gorby Tested-by: Yin, Fengwei Signed-off-by: Alan Cox Cc: Grooming Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 6f4f8d3654d..a8c82f5d769 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -879,7 +879,7 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, if (len > gsm->mtu) { if (dlci->adaption == 3) { /* Over long frame, bin it */ - kfree_skb(dlci->skb); + dev_kfree_skb_any(dlci->skb); dlci->skb = NULL; return 0; } @@ -905,7 +905,7 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, skb_pull(dlci->skb, len); __gsm_data_queue(dlci, msg); if (last) { - kfree_skb(dlci->skb); + dev_kfree_skb_any(dlci->skb); dlci->skb = NULL; } return size; @@ -1674,7 +1674,7 @@ static void gsm_dlci_free(struct kref *ref) dlci->gsm->dlci[dlci->addr] = NULL; kfifo_free(dlci->fifo); while ((dlci->skb = skb_dequeue(&dlci->skb_list))) - kfree_skb(dlci->skb); + dev_kfree_skb(dlci->skb); kfree(dlci); } @@ -2013,7 +2013,7 @@ void gsm_cleanup_mux(struct gsm_mux *gsm) { int i; struct gsm_dlci *dlci = gsm->dlci[0]; - struct gsm_msg *txq, *utxq; + struct gsm_msg *txq, *ntxq; struct gsm_control *gc; gsm->dead = 1; From 88ed2a60610974443335c924d7cb8e5dcf9dbdc1 Mon Sep 17 00:00:00 2001 From: Russ Gorby Date: Mon, 13 Aug 2012 13:45:30 +0100 Subject: [PATCH 127/235] n_gsm: memory leak in uplink error path Uplink (TX) network data will go through gsm_dlci_data_output_framed there is a bug where if memory allocation fails, the skb which has already been pulled off the list will be lost. In addition TX skbs were being processed in LIFO order Fixed the memory leak, and changed to FIFO order processing Signed-off-by: Russ Gorby Tested-by: Kappel, LaurentX Signed-off-by: Alan Cox Cc: Showjumping Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index a8c82f5d769..3e210a430fb 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -868,7 +868,7 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, /* dlci->skb is locked by tx_lock */ if (dlci->skb == NULL) { - dlci->skb = skb_dequeue(&dlci->skb_list); + dlci->skb = skb_dequeue_tail(&dlci->skb_list); if (dlci->skb == NULL) return 0; first = 1; @@ -892,8 +892,11 @@ static int gsm_dlci_data_output_framed(struct gsm_mux *gsm, /* FIXME: need a timer or something to kick this so it can't get stuck with no work outstanding and no buffer free */ - if (msg == NULL) + if (msg == NULL) { + skb_queue_tail(&dlci->skb_list, dlci->skb); + dlci->skb = NULL; return -ENOMEM; + } dp = msg->data; if (dlci->adaption == 4) { /* Interruptible framed (Packetised Data) */ From c3a6344ae475763b6fb0fb2ec3639004f500d0f1 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Thu, 16 Aug 2012 16:16:56 +0300 Subject: [PATCH 128/235] TTY: tty_alloc_driver() returns error pointers We changed these from alloc_tty_driver() to tty_alloc_driver() so the error handling needs to modified to check for IS_ERR() instead of NULL. Signed-off-by: Dan Carpenter Acked-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 4 ++-- drivers/char/ttyprintk.c | 4 ++-- drivers/tty/moxa.c | 4 ++-- drivers/tty/pty.c | 8 ++++---- 4 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index d9335ae1fad..5db08c78beb 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -2813,8 +2813,8 @@ static int __init synclink_cs_init(void) serial_driver = tty_alloc_driver(MAX_DEVICE_COUNT, TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV); - if (!serial_driver) { - rc = -ENOMEM; + if (IS_ERR(serial_driver)) { + rc = PTR_ERR(serial_driver); goto err; } diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 561f8aa7cd8..af98f6d6509 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -187,8 +187,8 @@ static int __init ttyprintk_init(void) TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | TTY_DRIVER_UNNUMBERED_NODE); - if (!ttyprintk_driver) - return ret; + if (IS_ERR(ttyprintk_driver)) + return PTR_ERR(ttyprintk_driver); ttyprintk_driver->driver_name = "ttyprintk"; ttyprintk_driver->name = "ttyprintk"; diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c index 3b17a044c21..56e616b9109 100644 --- a/drivers/tty/moxa.c +++ b/drivers/tty/moxa.c @@ -1048,8 +1048,8 @@ static int __init moxa_init(void) moxaDriver = tty_alloc_driver(MAX_PORTS + 1, TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV); - if (!moxaDriver) - return -ENOMEM; + if (IS_ERR(moxaDriver)) + return PTR_ERR(moxaDriver); moxaDriver->name = "ttyMX"; moxaDriver->major = ttymajor; diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index f5a27c66ff6..2bace847eb3 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -448,14 +448,14 @@ static void __init legacy_pty_init(void) TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_ALLOC); - if (!pty_driver) + if (IS_ERR(pty_driver)) panic("Couldn't allocate pty driver"); pty_slave_driver = tty_alloc_driver(legacy_count, TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_ALLOC); - if (!pty_slave_driver) + if (IS_ERR(pty_slave_driver)) panic("Couldn't allocate pty slave driver"); pty_driver->driver_name = "pty_master"; @@ -682,7 +682,7 @@ static void __init unix98_pty_init(void) TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM | TTY_DRIVER_DYNAMIC_ALLOC); - if (!ptm_driver) + if (IS_ERR(ptm_driver)) panic("Couldn't allocate Unix98 ptm driver"); pts_driver = tty_alloc_driver(NR_UNIX98_PTY_MAX, TTY_DRIVER_RESET_TERMIOS | @@ -690,7 +690,7 @@ static void __init unix98_pty_init(void) TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM | TTY_DRIVER_DYNAMIC_ALLOC); - if (!pts_driver) + if (IS_ERR(pts_driver)) panic("Couldn't allocate Unix98 pts driver"); ptm_driver->driver_name = "pty_master"; From 221ca778d677c5ec3a33385a3b6dd548174252a6 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Wed, 1 Aug 2012 12:00:20 +0400 Subject: [PATCH 129/235] serial: sc26xx: Fix compile breakage This patch fixes the following compile breakage: CC drivers/tty/serial/sc26xx.o drivers/tty/serial/sc26xx.c: In function 'read_sc_port': drivers/tty/serial/sc26xx.c:100: error: implicit declaration of function 'readb' drivers/tty/serial/sc26xx.c: In function 'write_sc_port': drivers/tty/serial/sc26xx.c:105: error: implicit declaration of function 'writeb' drivers/tty/serial/sc26xx.c: In function 'sc26xx_probe': drivers/tty/serial/sc26xx.c:652: error: implicit declaration of function 'ioremap_nocache' drivers/tty/serial/sc26xx.c:652: warning: assignment makes pointer from integer without a cast make[3]: *** [drivers/tty/serial/sc26xx.o] Error 1 make[2]: *** [drivers/tty/serial] Error 2 make[1]: *** [drivers/tty] Error 2 make: *** [drivers] Error 2 Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sc26xx.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c index e0b4b0a30a5..3992e48b4c7 100644 --- a/drivers/tty/serial/sc26xx.c +++ b/drivers/tty/serial/sc26xx.c @@ -20,6 +20,7 @@ #include #include #include +#include #if defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ From a92098a1cb7ec08c86d1b97d1831d8edaf26b1a2 Mon Sep 17 00:00:00 2001 From: Fengguang Wu Date: Sat, 28 Jul 2012 20:43:57 +0800 Subject: [PATCH 130/235] pch_uart: check kzalloc result in dma_handle_tx() Reported by coccinelle: drivers/tty/serial/pch_uart.c:979:1-14: alloc with no test, possible model on line 994 Signed-off-by: Fengguang Wu Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/pch_uart.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/pch_uart.c b/drivers/tty/serial/pch_uart.c index 558ce8509a9..4cd6c238152 100644 --- a/drivers/tty/serial/pch_uart.c +++ b/drivers/tty/serial/pch_uart.c @@ -979,6 +979,10 @@ static unsigned int dma_handle_tx(struct eg20t_port *priv) priv->tx_dma_use = 1; priv->sg_tx_p = kzalloc(sizeof(struct scatterlist)*num, GFP_ATOMIC); + if (!priv->sg_tx_p) { + dev_err(priv->port.dev, "%s:kzalloc Failed\n", __func__); + return 0; + } sg_init_table(priv->sg_tx_p, num); /* Initialize SG table */ sg = priv->sg_tx_p; From 9574f36fb801035f6ab0fbb1b53ce2c12c17d100 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Mon, 30 Jul 2012 10:30:26 +1000 Subject: [PATCH 131/235] OMAP/serial: Add support for driving a GPIO as DTR. OMAP hardware doesn't provide a phyisical DTR line, but some configurations may need a DTR line which tracks whether the device is open or not. So allow a gpio to be configured as the DTR line. Signed-off-by: NeilBrown Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-omap2/serial.c | 3 ++ arch/arm/plat-omap/include/plat/omap-serial.h | 7 ++++ drivers/tty/serial/omap-serial.c | 35 ++++++++++++++++++- 3 files changed, 44 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index c1b93c752d7..25d53b2800c 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -304,6 +304,9 @@ void __init omap_serial_init_port(struct omap_board_data *bdata, omap_up.dma_rx_timeout = info->dma_rx_timeout; omap_up.dma_rx_poll_rate = info->dma_rx_poll_rate; omap_up.autosuspend_timeout = info->autosuspend_timeout; + omap_up.DTR_gpio = info->DTR_gpio; + omap_up.DTR_inverted = info->DTR_inverted; + omap_up.DTR_present = info->DTR_present; pdata = &omap_up; pdata_size = sizeof(struct omap_uart_port_info); diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 1a52725ffcf..52d3de45745 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -69,6 +69,9 @@ struct omap_uart_port_info { unsigned int dma_rx_timeout; unsigned int autosuspend_timeout; unsigned int dma_rx_poll_rate; + int DTR_gpio; + int DTR_inverted; + int DTR_present; int (*get_context_loss_count)(struct device *); void (*set_forceidle)(struct platform_device *); @@ -131,6 +134,10 @@ struct uart_omap_port { u32 errata; u8 wakeups_enabled; + int DTR_gpio; + int DTR_inverted; + int DTR_active; + struct pm_qos_request pm_qos_request; u32 latency; u32 calc_latency; diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index d3cda0cb2df..aa603f221c6 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include @@ -507,6 +508,16 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) up->mcr |= mcr; serial_out(up, UART_MCR, up->mcr); pm_runtime_put(&up->pdev->dev); + + if (gpio_is_valid(up->DTR_gpio) && + !!(mctrl & TIOCM_DTR) != up->DTR_active) { + up->DTR_active = !up->DTR_active; + if (gpio_cansleep(up->DTR_gpio)) + schedule_work(&up->qos_work); + else + gpio_set_value(up->DTR_gpio, + up->DTR_active != up->DTR_inverted); + } } static void serial_omap_break_ctl(struct uart_port *port, int break_state) @@ -715,6 +726,9 @@ static void serial_omap_uart_qos_work(struct work_struct *work) qos_work); pm_qos_update_request(&up->pm_qos_request, up->latency); + if (gpio_is_valid(up->DTR_gpio)) + gpio_set_value_cansleep(up->DTR_gpio, + up->DTR_active != up->DTR_inverted); } static void @@ -1435,7 +1449,7 @@ static int serial_omap_probe(struct platform_device *pdev) struct uart_omap_port *up; struct resource *mem, *irq, *dma_tx, *dma_rx; struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data; - int ret = -ENOSPC; + int ret; if (pdev->dev.of_node) omap_up_info = of_get_uart_port_info(&pdev->dev); @@ -1466,10 +1480,29 @@ static int serial_omap_probe(struct platform_device *pdev) if (!dma_tx) return -ENXIO; + if (gpio_is_valid(omap_up_info->DTR_gpio) && + omap_up_info->DTR_present) { + ret = gpio_request(omap_up_info->DTR_gpio, "omap-serial"); + if (ret < 0) + return ret; + ret = gpio_direction_output(omap_up_info->DTR_gpio, + omap_up_info->DTR_inverted); + if (ret < 0) + return ret; + } + up = devm_kzalloc(&pdev->dev, sizeof(*up), GFP_KERNEL); if (!up) return -ENOMEM; + if (gpio_is_valid(omap_up_info->DTR_gpio) && + omap_up_info->DTR_present) { + up->DTR_gpio = omap_up_info->DTR_gpio; + up->DTR_inverted = omap_up_info->DTR_inverted; + } else + up->DTR_gpio = -EINVAL; + up->DTR_active = 0; + up->pdev = pdev; up->port.dev = &pdev->dev; up->port.type = PORT_OMAP; From f65444187a66bf54af32a10902877dd0326456d1 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Mon, 6 Aug 2012 19:42:32 +0400 Subject: [PATCH 132/235] serial: New serial driver MAX310X This driver is a replacement for a MAX3107 driver with a lot of improvements and new features. The main differences from the old version: - Using the regmap. - Using devm_XXX-related functions. - The use of threaded IRQ with IRQF_ONESHOT flag allows the driver to the hardware that supports only level IRQ. - Improved error handling of serial port, improved FIFO handling, improved hardware & software flow control. - Advanced flags allows turn on RS-485 mode (Auto direction control). - Ability to load multiple instances of drivers. - Added support for MAX3108. - GPIO support. - Driver is quite ready for adding I2C support and support other ICs with compatible registers set (MAX3109, MAX14830). Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 13 +- drivers/tty/serial/Makefile | 2 +- drivers/tty/serial/max3107.c | 1215 ------------------------ drivers/tty/serial/max3107.h | 441 --------- drivers/tty/serial/max310x.c | 1259 +++++++++++++++++++++++++ include/linux/platform_data/max310x.h | 67 ++ include/linux/serial_core.h | 4 +- 7 files changed, 1339 insertions(+), 1662 deletions(-) delete mode 100644 drivers/tty/serial/max3107.c delete mode 100644 drivers/tty/serial/max3107.h create mode 100644 drivers/tty/serial/max310x.c create mode 100644 include/linux/platform_data/max310x.h diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 00207865ec5..7b3d9de938e 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -257,12 +257,19 @@ config SERIAL_MAX3100 help MAX3100 chip support -config SERIAL_MAX3107 - tristate "MAX3107 support" +config SERIAL_MAX310X + bool "MAX310X support" depends on SPI select SERIAL_CORE + select REGMAP_SPI if SPI + default n help - MAX3107 chip support + This selects support for an advanced UART from Maxim (Dallas). + Supported ICs are MAX3107, MAX3108. + Each IC contains 128 words each of receive and transmit FIFO + that can be controlled through I2C or high-speed SPI. + + Say Y here if you want to support this ICs. config SERIAL_DZ bool "DECstation DZ serial driver" diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 8a5df3804e5..2af9e5279da 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -28,7 +28,7 @@ obj-$(CONFIG_SERIAL_BFIN) += bfin_uart.o obj-$(CONFIG_SERIAL_BFIN_SPORT) += bfin_sport_uart.o obj-$(CONFIG_SERIAL_SAMSUNG) += samsung.o obj-$(CONFIG_SERIAL_MAX3100) += max3100.o -obj-$(CONFIG_SERIAL_MAX3107) += max3107.o +obj-$(CONFIG_SERIAL_MAX310X) += max310x.o obj-$(CONFIG_SERIAL_IP22_ZILOG) += ip22zilog.o obj-$(CONFIG_SERIAL_MUX) += mux.o obj-$(CONFIG_SERIAL_68328) += 68328serial.o diff --git a/drivers/tty/serial/max3107.c b/drivers/tty/serial/max3107.c deleted file mode 100644 index 17c7ba805d9..00000000000 --- a/drivers/tty/serial/max3107.c +++ /dev/null @@ -1,1215 +0,0 @@ -/* - * max3107.c - spi uart protocol driver for Maxim 3107 - * Based on max3100.c - * by Christian Pellegrin - * and max3110.c - * by Feng Tang - * - * Copyright (C) Aavamobile 2009 - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include "max3107.h" - -static const struct baud_table brg26_ext[] = { - { 300, MAX3107_BRG26_B300 }, - { 600, MAX3107_BRG26_B600 }, - { 1200, MAX3107_BRG26_B1200 }, - { 2400, MAX3107_BRG26_B2400 }, - { 4800, MAX3107_BRG26_B4800 }, - { 9600, MAX3107_BRG26_B9600 }, - { 19200, MAX3107_BRG26_B19200 }, - { 57600, MAX3107_BRG26_B57600 }, - { 115200, MAX3107_BRG26_B115200 }, - { 230400, MAX3107_BRG26_B230400 }, - { 460800, MAX3107_BRG26_B460800 }, - { 921600, MAX3107_BRG26_B921600 }, - { 0, 0 } -}; - -static const struct baud_table brg13_int[] = { - { 300, MAX3107_BRG13_IB300 }, - { 600, MAX3107_BRG13_IB600 }, - { 1200, MAX3107_BRG13_IB1200 }, - { 2400, MAX3107_BRG13_IB2400 }, - { 4800, MAX3107_BRG13_IB4800 }, - { 9600, MAX3107_BRG13_IB9600 }, - { 19200, MAX3107_BRG13_IB19200 }, - { 57600, MAX3107_BRG13_IB57600 }, - { 115200, MAX3107_BRG13_IB115200 }, - { 230400, MAX3107_BRG13_IB230400 }, - { 460800, MAX3107_BRG13_IB460800 }, - { 921600, MAX3107_BRG13_IB921600 }, - { 0, 0 } -}; - -static u32 get_new_brg(int baud, struct max3107_port *s) -{ - int i; - const struct baud_table *baud_tbl = s->baud_tbl; - - for (i = 0; i < 13; i++) { - if (baud == baud_tbl[i].baud) - return baud_tbl[i].new_brg; - } - - return 0; -} - -/* Perform SPI transfer for write/read of device register(s) */ -int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len) -{ - struct spi_message spi_msg; - struct spi_transfer spi_xfer; - - /* Initialize SPI ,message */ - spi_message_init(&spi_msg); - - /* Initialize SPI transfer */ - memset(&spi_xfer, 0, sizeof spi_xfer); - spi_xfer.len = len; - spi_xfer.tx_buf = tx; - spi_xfer.rx_buf = rx; - spi_xfer.speed_hz = MAX3107_SPI_SPEED; - - /* Add SPI transfer to SPI message */ - spi_message_add_tail(&spi_xfer, &spi_msg); - -#ifdef DBG_TRACE_SPI_DATA - { - int i; - pr_info("tx len %d:\n", spi_xfer.len); - for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) - pr_info(" %x", ((u8 *)spi_xfer.tx_buf)[i]); - pr_info("\n"); - } -#endif - - /* Perform synchronous SPI transfer */ - if (spi_sync(s->spi, &spi_msg)) { - dev_err(&s->spi->dev, "spi_sync failure\n"); - return -EIO; - } - -#ifdef DBG_TRACE_SPI_DATA - if (spi_xfer.rx_buf) { - int i; - pr_info("rx len %d:\n", spi_xfer.len); - for (i = 0 ; i < spi_xfer.len && i < 32 ; i++) - pr_info(" %x", ((u8 *)spi_xfer.rx_buf)[i]); - pr_info("\n"); - } -#endif - return 0; -} -EXPORT_SYMBOL_GPL(max3107_rw); - -/* Puts received data to circular buffer */ -static void put_data_to_circ_buf(struct max3107_port *s, unsigned char *data, - int len) -{ - struct uart_port *port = &s->port; - struct tty_struct *tty; - - if (!port->state) - return; - - tty = port->state->port.tty; - if (!tty) - return; - - /* Insert received data */ - tty_insert_flip_string(tty, data, len); - /* Update RX counter */ - port->icount.rx += len; -} - -/* Handle data receiving */ -static void max3107_handlerx(struct max3107_port *s, u16 rxlvl) -{ - int i; - int j; - int len; /* SPI transfer buffer length */ - u16 *buf; - u8 *valid_str; - - if (!s->rx_enabled) - /* RX is disabled */ - return; - - if (rxlvl == 0) { - /* RX fifo is empty */ - return; - } else if (rxlvl >= MAX3107_RX_FIFO_SIZE) { - dev_warn(&s->spi->dev, "Possible RX FIFO overrun %d\n", rxlvl); - /* Ensure sanity of RX level */ - rxlvl = MAX3107_RX_FIFO_SIZE; - } - if ((s->rxbuf == 0) || (s->rxstr == 0)) { - dev_warn(&s->spi->dev, "Rx buffer/str isn't ready\n"); - return; - } - buf = s->rxbuf; - valid_str = s->rxstr; - while (rxlvl) { - pr_debug("rxlvl %d\n", rxlvl); - /* Clear buffer */ - memset(buf, 0, sizeof(u16) * (MAX3107_RX_FIFO_SIZE + 2)); - len = 0; - if (s->irqen_reg & MAX3107_IRQ_RXFIFO_BIT) { - /* First disable RX FIFO interrupt */ - pr_debug("Disabling RX INT\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg &= ~MAX3107_IRQ_RXFIFO_BIT; - buf[0] |= s->irqen_reg; - len++; - } - /* Just increase the length by amount of words in FIFO since - * buffer was zeroed and SPI transfer of 0x0000 means reading - * from RX FIFO - */ - len += rxlvl; - /* Append RX level query */ - buf[len] = MAX3107_RXFIFOLVL_REG; - len++; - - /* Perform the SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, len * 2)) { - dev_err(&s->spi->dev, "SPI transfer for RX h failed\n"); - return; - } - - /* Skip RX FIFO interrupt disabling word if it was added */ - j = ((len - 1) - rxlvl); - /* Read received words */ - for (i = 0; i < rxlvl; i++, j++) - valid_str[i] = (u8)buf[j]; - put_data_to_circ_buf(s, valid_str, rxlvl); - /* Get new RX level */ - rxlvl = (buf[len - 1] & MAX3107_SPI_RX_DATA_MASK); - } - - if (s->rx_enabled) { - /* RX still enabled, re-enable RX FIFO interrupt */ - pr_debug("Enabling RX INT\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; - buf[0] |= s->irqen_reg; - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "RX FIFO INT enabling failed\n"); - } - - /* Push the received data to receivers */ - if (s->port.state->port.tty) - tty_flip_buffer_push(s->port.state->port.tty); -} - - -/* Handle data sending */ -static void max3107_handletx(struct max3107_port *s) -{ - struct circ_buf *xmit = &s->port.state->xmit; - int i; - unsigned long flags; - int len; /* SPI transfer buffer length */ - u16 *buf; - - if (!s->tx_fifo_empty) - /* Don't send more data before previous data is sent */ - return; - - if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port)) - /* No data to send or TX is stopped */ - return; - - if (!s->txbuf) { - dev_warn(&s->spi->dev, "Txbuf isn't ready\n"); - return; - } - buf = s->txbuf; - /* Get length of data pending in circular buffer */ - len = uart_circ_chars_pending(xmit); - if (len) { - /* Limit to size of TX FIFO */ - if (len > MAX3107_TX_FIFO_SIZE) - len = MAX3107_TX_FIFO_SIZE; - - pr_debug("txlen %d\n", len); - - /* Update TX counter */ - s->port.icount.tx += len; - - /* TX FIFO will no longer be empty */ - s->tx_fifo_empty = 0; - - i = 0; - if (s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT) { - /* First disable TX empty interrupt */ - pr_debug("Disabling TE INT\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg &= ~MAX3107_IRQ_TXEMPTY_BIT; - buf[i] |= s->irqen_reg; - i++; - len++; - } - /* Add data to send */ - spin_lock_irqsave(&s->port.lock, flags); - for ( ; i < len ; i++) { - buf[i] = (MAX3107_WRITE_BIT | MAX3107_THR_REG); - buf[i] |= ((u16)xmit->buf[xmit->tail] & - MAX3107_SPI_TX_DATA_MASK); - xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); - } - spin_unlock_irqrestore(&s->port.lock, flags); - if (!(s->irqen_reg & MAX3107_IRQ_TXEMPTY_BIT)) { - /* Enable TX empty interrupt */ - pr_debug("Enabling TE INT\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG); - s->irqen_reg |= MAX3107_IRQ_TXEMPTY_BIT; - buf[i] |= s->irqen_reg; - i++; - len++; - } - if (!s->tx_enabled) { - /* Enable TX */ - pr_debug("Enable TX\n"); - buf[i] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg &= ~MAX3107_MODE1_TXDIS_BIT; - buf[i] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - s->tx_enabled = 1; - i++; - len++; - } - - /* Perform the SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, len*2)) { - dev_err(&s->spi->dev, - "SPI transfer TX handling failed\n"); - return; - } - } - - /* Indicate wake up if circular buffer is getting low on data */ - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&s->port); - -} - -/* Handle interrupts - * Also reads and returns current RX FIFO level - */ -static u16 handle_interrupt(struct max3107_port *s) -{ - u16 buf[4]; /* Buffer for SPI transfers */ - u8 irq_status; - u16 rx_level; - unsigned long flags; - - /* Read IRQ status register */ - buf[0] = MAX3107_IRQSTS_REG; - /* Read status IRQ status register */ - buf[1] = MAX3107_STS_IRQSTS_REG; - /* Read LSR IRQ status register */ - buf[2] = MAX3107_LSR_IRQSTS_REG; - /* Query RX level */ - buf[3] = MAX3107_RXFIFOLVL_REG; - - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 8)) { - dev_err(&s->spi->dev, - "SPI transfer for INTR handling failed\n"); - return 0; - } - - irq_status = (u8)buf[0]; - pr_debug("IRQSTS %x\n", irq_status); - rx_level = (buf[3] & MAX3107_SPI_RX_DATA_MASK); - - if (irq_status & MAX3107_IRQ_LSR_BIT) { - /* LSR interrupt */ - if (buf[2] & MAX3107_LSR_RXTO_BIT) - /* RX timeout interrupt, - * handled by normal RX handling - */ - pr_debug("RX TO INT\n"); - } - - if (irq_status & MAX3107_IRQ_TXEMPTY_BIT) { - /* Tx empty interrupt, - * disable TX and set tx_fifo_empty flag - */ - pr_debug("TE INT, disabling TX\n"); - buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; - buf[0] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "SPI transfer TX dis failed\n"); - s->tx_enabled = 0; - s->tx_fifo_empty = 1; - } - - if (irq_status & MAX3107_IRQ_RXFIFO_BIT) - /* RX FIFO interrupt, - * handled by normal RX handling - */ - pr_debug("RFIFO INT\n"); - - /* Return RX level */ - return rx_level; -} - -/* Trigger work thread*/ -static void max3107_dowork(struct max3107_port *s) -{ - if (!work_pending(&s->work) && !freezing(current) && !s->suspended) - queue_work(s->workqueue, &s->work); - else - dev_warn(&s->spi->dev, "interrup isn't serviced normally!\n"); -} - -/* Work thread */ -static void max3107_work(struct work_struct *w) -{ - struct max3107_port *s = container_of(w, struct max3107_port, work); - u16 rxlvl = 0; - int len; /* SPI transfer buffer length */ - u16 buf[5]; /* Buffer for SPI transfers */ - unsigned long flags; - - /* Start by reading current RX FIFO level */ - buf[0] = MAX3107_RXFIFOLVL_REG; - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer RX lev failed\n"); - rxlvl = 0; - } else { - rxlvl = (buf[0] & MAX3107_SPI_RX_DATA_MASK); - } - - do { - pr_debug("rxlvl %d\n", rxlvl); - - /* Handle RX */ - max3107_handlerx(s, rxlvl); - rxlvl = 0; - - if (s->handle_irq) { - /* Handle pending interrupts - * We also get new RX FIFO level since new data may - * have been received while pushing received data to - * receivers - */ - s->handle_irq = 0; - rxlvl = handle_interrupt(s); - } - - /* Handle TX */ - max3107_handletx(s); - - /* Handle configuration changes */ - len = 0; - spin_lock_irqsave(&s->data_lock, flags); - if (s->mode1_commit) { - pr_debug("mode1_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - buf[len++] |= s->mode1_reg; - s->mode1_commit = 0; - } - if (s->lcr_commit) { - pr_debug("lcr_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG); - buf[len++] |= s->lcr_reg; - s->lcr_commit = 0; - } - if (s->brg_commit) { - pr_debug("brg_commit\n"); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG); - buf[len++] |= ((s->brg_cfg >> 16) & - MAX3107_SPI_TX_DATA_MASK); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG); - buf[len++] |= ((s->brg_cfg >> 8) & - MAX3107_SPI_TX_DATA_MASK); - buf[len] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG); - buf[len++] |= ((s->brg_cfg) & 0xff); - s->brg_commit = 0; - } - spin_unlock_irqrestore(&s->data_lock, flags); - - if (len > 0) { - if (max3107_rw(s, (u8 *)buf, NULL, len * 2)) - dev_err(&s->spi->dev, - "SPI transfer config failed\n"); - } - - /* Reloop if interrupt handling indicated data in RX FIFO */ - } while (rxlvl); - -} - -/* Set sleep mode */ -static void max3107_set_sleep(struct max3107_port *s, int mode) -{ - u16 buf[1]; /* Buffer for SPI transfer */ - unsigned long flags; - pr_debug("enter, mode %d\n", mode); - - buf[0] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG); - spin_lock_irqsave(&s->data_lock, flags); - switch (mode) { - case MAX3107_DISABLE_FORCED_SLEEP: - s->mode1_reg &= ~MAX3107_MODE1_FORCESLEEP_BIT; - break; - case MAX3107_ENABLE_FORCED_SLEEP: - s->mode1_reg |= MAX3107_MODE1_FORCESLEEP_BIT; - break; - case MAX3107_DISABLE_AUTOSLEEP: - s->mode1_reg &= ~MAX3107_MODE1_AUTOSLEEP_BIT; - break; - case MAX3107_ENABLE_AUTOSLEEP: - s->mode1_reg |= MAX3107_MODE1_AUTOSLEEP_BIT; - break; - default: - spin_unlock_irqrestore(&s->data_lock, flags); - dev_warn(&s->spi->dev, "invalid sleep mode\n"); - return; - } - buf[0] |= s->mode1_reg; - spin_unlock_irqrestore(&s->data_lock, flags); - - if (max3107_rw(s, (u8 *)buf, NULL, 2)) - dev_err(&s->spi->dev, "SPI transfer sleep mode failed\n"); - - if (mode == MAX3107_DISABLE_AUTOSLEEP || - mode == MAX3107_DISABLE_FORCED_SLEEP) - msleep(MAX3107_WAKEUP_DELAY); -} - -/* Perform full register initialization */ -static void max3107_register_init(struct max3107_port *s) -{ - u16 buf[11]; /* Buffer for SPI transfers */ - - /* 1. Configure baud rate, 9600 as default */ - s->baud = 9600; - /* the below is default*/ - if (s->ext_clk) { - s->brg_cfg = MAX3107_BRG26_B9600; - s->baud_tbl = (struct baud_table *)brg26_ext; - } else { - s->brg_cfg = MAX3107_BRG13_IB9600; - s->baud_tbl = (struct baud_table *)brg13_int; - } - - if (s->pdata->init) - s->pdata->init(s); - - buf[0] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVMSB_REG) - | ((s->brg_cfg >> 16) & MAX3107_SPI_TX_DATA_MASK); - buf[1] = (MAX3107_WRITE_BIT | MAX3107_BRGDIVLSB_REG) - | ((s->brg_cfg >> 8) & MAX3107_SPI_TX_DATA_MASK); - buf[2] = (MAX3107_WRITE_BIT | MAX3107_BRGCFG_REG) - | ((s->brg_cfg) & 0xff); - - /* 2. Configure LCR register, 8N1 mode by default */ - s->lcr_reg = MAX3107_LCR_WORD_LEN_8; - buf[3] = (MAX3107_WRITE_BIT | MAX3107_LCR_REG) - | s->lcr_reg; - - /* 3. Configure MODE 1 register */ - s->mode1_reg = 0; - /* Enable IRQ pin */ - s->mode1_reg |= MAX3107_MODE1_IRQSEL_BIT; - /* Disable TX */ - s->mode1_reg |= MAX3107_MODE1_TXDIS_BIT; - s->tx_enabled = 0; - /* RX is enabled */ - s->rx_enabled = 1; - buf[4] = (MAX3107_WRITE_BIT | MAX3107_MODE1_REG) - | s->mode1_reg; - - /* 4. Configure MODE 2 register */ - buf[5] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); - if (s->loopback) { - /* Enable loopback */ - buf[5] |= MAX3107_MODE2_LOOPBACK_BIT; - } - /* Reset FIFOs */ - buf[5] |= MAX3107_MODE2_FIFORST_BIT; - s->tx_fifo_empty = 1; - - /* 5. Configure FIFO trigger level register */ - buf[6] = (MAX3107_WRITE_BIT | MAX3107_FIFOTRIGLVL_REG); - /* RX FIFO trigger for 16 words, TX FIFO trigger not used */ - buf[6] |= (MAX3107_FIFOTRIGLVL_RX(16) | MAX3107_FIFOTRIGLVL_TX(0)); - - /* 6. Configure flow control levels */ - buf[7] = (MAX3107_WRITE_BIT | MAX3107_FLOWLVL_REG); - /* Flow control halt level 96, resume level 48 */ - buf[7] |= (MAX3107_FLOWLVL_RES(48) | MAX3107_FLOWLVL_HALT(96)); - - /* 7. Configure flow control */ - buf[8] = (MAX3107_WRITE_BIT | MAX3107_FLOWCTRL_REG); - /* Enable auto CTS and auto RTS flow control */ - buf[8] |= (MAX3107_FLOWCTRL_AUTOCTS_BIT | MAX3107_FLOWCTRL_AUTORTS_BIT); - - /* 8. Configure RX timeout register */ - buf[9] = (MAX3107_WRITE_BIT | MAX3107_RXTO_REG); - /* Timeout after 48 character intervals */ - buf[9] |= 0x0030; - - /* 9. Configure LSR interrupt enable register */ - buf[10] = (MAX3107_WRITE_BIT | MAX3107_LSR_IRQEN_REG); - /* Enable RX timeout interrupt */ - buf[10] |= MAX3107_LSR_RXTO_BIT; - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 22)) - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - - /* 10. Clear IRQ status register by reading it */ - buf[0] = MAX3107_IRQSTS_REG; - - /* 11. Configure interrupt enable register */ - /* Enable LSR interrupt */ - s->irqen_reg = MAX3107_IRQ_LSR_BIT; - /* Enable RX FIFO interrupt */ - s->irqen_reg |= MAX3107_IRQ_RXFIFO_BIT; - buf[1] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG) - | s->irqen_reg; - - /* 12. Clear FIFO reset that was set in step 6 */ - buf[2] = (MAX3107_WRITE_BIT | MAX3107_MODE2_REG); - if (s->loopback) { - /* Keep loopback enabled */ - buf[2] |= MAX3107_MODE2_LOOPBACK_BIT; - } - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 6)) - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - -} - -/* IRQ handler */ -static irqreturn_t max3107_irq(int irqno, void *dev_id) -{ - struct max3107_port *s = dev_id; - - if (irqno != s->spi->irq) { - /* Unexpected IRQ */ - return IRQ_NONE; - } - - /* Indicate irq */ - s->handle_irq = 1; - - /* Trigger work thread */ - max3107_dowork(s); - - return IRQ_HANDLED; -} - -/* HW suspension function - * - * Currently autosleep is used to decrease current consumption, alternative - * approach would be to set the chip to reset mode if UART is not being - * used but that would mess the GPIOs - * - */ -void max3107_hw_susp(struct max3107_port *s, int suspend) -{ - pr_debug("enter, suspend %d\n", suspend); - - if (suspend) { - /* Suspend requested, - * enable autosleep to decrease current consumption - */ - s->suspended = 1; - max3107_set_sleep(s, MAX3107_ENABLE_AUTOSLEEP); - } else { - /* Resume requested, - * disable autosleep - */ - s->suspended = 0; - max3107_set_sleep(s, MAX3107_DISABLE_AUTOSLEEP); - } -} -EXPORT_SYMBOL_GPL(max3107_hw_susp); - -/* Modem status IRQ enabling */ -static void max3107_enable_ms(struct uart_port *port) -{ - /* Modem status not supported */ -} - -/* Data send function */ -static void max3107_start_tx(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - /* Trigger work thread for sending data */ - max3107_dowork(s); -} - -/* Function for checking that there is no pending transfers */ -static unsigned int max3107_tx_empty(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - pr_debug("returning %d\n", - (s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit))); - return s->tx_fifo_empty && uart_circ_empty(&s->port.state->xmit); -} - -/* Function for stopping RX */ -static void max3107_stop_rx(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - unsigned long flags; - - /* Set RX disabled in MODE 1 register */ - spin_lock_irqsave(&s->data_lock, flags); - s->mode1_reg |= MAX3107_MODE1_RXDIS_BIT; - s->mode1_commit = 1; - spin_unlock_irqrestore(&s->data_lock, flags); - /* Set RX disabled */ - s->rx_enabled = 0; - /* Trigger work thread for doing the actual configuration change */ - max3107_dowork(s); -} - -/* Function for returning control pin states */ -static unsigned int max3107_get_mctrl(struct uart_port *port) -{ - /* DCD and DSR are not wired and CTS/RTS is handled automatically - * so just indicate DSR and CAR asserted - */ - return TIOCM_DSR | TIOCM_CAR; -} - -/* Function for setting control pin states */ -static void max3107_set_mctrl(struct uart_port *port, unsigned int mctrl) -{ - /* DCD and DSR are not wired and CTS/RTS is hadnled automatically - * so do nothing - */ -} - -/* Function for configuring UART parameters */ -static void max3107_set_termios(struct uart_port *port, - struct ktermios *termios, - struct ktermios *old) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - struct tty_struct *tty; - int baud; - u16 new_lcr = 0; - u32 new_brg = 0; - unsigned long flags; - - if (!port->state) - return; - - tty = port->state->port.tty; - if (!tty) - return; - - /* Get new LCR register values */ - /* Word size */ - if ((termios->c_cflag & CSIZE) == CS7) - new_lcr |= MAX3107_LCR_WORD_LEN_7; - else - new_lcr |= MAX3107_LCR_WORD_LEN_8; - - /* Parity */ - if (termios->c_cflag & PARENB) { - new_lcr |= MAX3107_LCR_PARITY_BIT; - if (!(termios->c_cflag & PARODD)) - new_lcr |= MAX3107_LCR_EVENPARITY_BIT; - } - - /* Stop bits */ - if (termios->c_cflag & CSTOPB) { - /* 2 stop bits */ - new_lcr |= MAX3107_LCR_STOPLEN_BIT; - } - - /* Mask termios capabilities we don't support */ - termios->c_cflag &= ~CMSPAR; - - /* Set status ignore mask */ - s->port.ignore_status_mask = 0; - if (termios->c_iflag & IGNPAR) - s->port.ignore_status_mask |= MAX3107_ALL_ERRORS; - - /* Set low latency to immediately handle pushed data */ - s->port.state->port.tty->low_latency = 1; - - /* Get new baud rate generator configuration */ - baud = tty_get_baud_rate(tty); - - spin_lock_irqsave(&s->data_lock, flags); - new_brg = get_new_brg(baud, s); - /* if can't find the corrent config, use previous */ - if (!new_brg) { - baud = s->baud; - new_brg = s->brg_cfg; - } - spin_unlock_irqrestore(&s->data_lock, flags); - tty_termios_encode_baud_rate(termios, baud, baud); - s->baud = baud; - - /* Update timeout according to new baud rate */ - uart_update_timeout(port, termios->c_cflag, baud); - - spin_lock_irqsave(&s->data_lock, flags); - if (s->lcr_reg != new_lcr) { - s->lcr_reg = new_lcr; - s->lcr_commit = 1; - } - if (s->brg_cfg != new_brg) { - s->brg_cfg = new_brg; - s->brg_commit = 1; - } - spin_unlock_irqrestore(&s->data_lock, flags); - - /* Trigger work thread for doing the actual configuration change */ - max3107_dowork(s); -} - -/* Port shutdown function */ -static void max3107_shutdown(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - if (s->suspended && s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Free the interrupt */ - free_irq(s->spi->irq, s); - - if (s->workqueue) { - /* Flush and destroy work queue */ - flush_workqueue(s->workqueue); - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - } - - /* Suspend HW */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 1); -} - -/* Port startup function */ -static int max3107_startup(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - - /* Initialize work queue */ - s->workqueue = create_freezable_workqueue("max3107"); - if (!s->workqueue) { - dev_err(&s->spi->dev, "Workqueue creation failed\n"); - return -EBUSY; - } - INIT_WORK(&s->work, max3107_work); - - /* Setup IRQ */ - if (request_irq(s->spi->irq, max3107_irq, IRQF_TRIGGER_FALLING, - "max3107", s)) { - dev_err(&s->spi->dev, "IRQ reguest failed\n"); - destroy_workqueue(s->workqueue); - s->workqueue = NULL; - return -EBUSY; - } - - /* Resume HW */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Init registers */ - max3107_register_init(s); - - return 0; -} - -/* Port type function */ -static const char *max3107_type(struct uart_port *port) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - return s->spi->modalias; -} - -/* Port release function */ -static void max3107_release_port(struct uart_port *port) -{ - /* Do nothing */ -} - -/* Port request function */ -static int max3107_request_port(struct uart_port *port) -{ - /* Do nothing */ - return 0; -} - -/* Port config function */ -static void max3107_config_port(struct uart_port *port, int flags) -{ - struct max3107_port *s = container_of(port, struct max3107_port, port); - s->port.type = PORT_MAX3107; -} - -/* Port verify function */ -static int max3107_verify_port(struct uart_port *port, - struct serial_struct *ser) -{ - if (ser->type == PORT_UNKNOWN || ser->type == PORT_MAX3107) - return 0; - - return -EINVAL; -} - -/* Port stop TX function */ -static void max3107_stop_tx(struct uart_port *port) -{ - /* Do nothing */ -} - -/* Port break control function */ -static void max3107_break_ctl(struct uart_port *port, int break_state) -{ - /* We don't support break control, do nothing */ -} - - -/* Port functions */ -static struct uart_ops max3107_ops = { - .tx_empty = max3107_tx_empty, - .set_mctrl = max3107_set_mctrl, - .get_mctrl = max3107_get_mctrl, - .stop_tx = max3107_stop_tx, - .start_tx = max3107_start_tx, - .stop_rx = max3107_stop_rx, - .enable_ms = max3107_enable_ms, - .break_ctl = max3107_break_ctl, - .startup = max3107_startup, - .shutdown = max3107_shutdown, - .set_termios = max3107_set_termios, - .type = max3107_type, - .release_port = max3107_release_port, - .request_port = max3107_request_port, - .config_port = max3107_config_port, - .verify_port = max3107_verify_port, -}; - -/* UART driver data */ -static struct uart_driver max3107_uart_driver = { - .owner = THIS_MODULE, - .driver_name = "ttyMAX", - .dev_name = "ttyMAX", - .nr = 1, -}; - -static int driver_registered = 0; - - - -/* 'Generic' platform data */ -static struct max3107_plat generic_plat_data = { - .loopback = 0, - .ext_clk = 1, - .hw_suspend = max3107_hw_susp, - .polled_mode = 0, - .poll_time = 0, -}; - - -/*******************************************************************/ - -/** - * max3107_probe - SPI bus probe entry point - * @spi: the spi device - * - * SPI wants us to probe this device and if appropriate claim it. - * Perform any platform specific requirements and then initialise - * the device. - */ - -int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata) -{ - struct max3107_port *s; - u16 buf[2]; /* Buffer for SPI transfers */ - int retval; - - pr_info("enter max3107 probe\n"); - - /* Allocate port structure */ - s = kzalloc(sizeof(*s), GFP_KERNEL); - if (!s) { - pr_err("Allocating port structure failed\n"); - return -ENOMEM; - } - - s->pdata = pdata; - - /* SPI Rx buffer - * +2 for RX FIFO interrupt - * disabling and RX level query - */ - s->rxbuf = kzalloc(sizeof(u16) * (MAX3107_RX_FIFO_SIZE+2), GFP_KERNEL); - if (!s->rxbuf) { - pr_err("Allocating RX buffer failed\n"); - retval = -ENOMEM; - goto err_free4; - } - s->rxstr = kzalloc(sizeof(u8) * MAX3107_RX_FIFO_SIZE, GFP_KERNEL); - if (!s->rxstr) { - pr_err("Allocating RX buffer failed\n"); - retval = -ENOMEM; - goto err_free3; - } - /* SPI Tx buffer - * SPI transfer buffer - * +3 for TX FIFO empty - * interrupt disabling and - * enabling and TX enabling - */ - s->txbuf = kzalloc(sizeof(u16) * MAX3107_TX_FIFO_SIZE + 3, GFP_KERNEL); - if (!s->txbuf) { - pr_err("Allocating TX buffer failed\n"); - retval = -ENOMEM; - goto err_free2; - } - /* Initialize shared data lock */ - spin_lock_init(&s->data_lock); - - /* SPI intializations */ - dev_set_drvdata(&spi->dev, s); - spi->mode = SPI_MODE_0; - spi->dev.platform_data = pdata; - spi->bits_per_word = 16; - s->ext_clk = pdata->ext_clk; - s->loopback = pdata->loopback; - spi_setup(spi); - s->spi = spi; - - /* Check REV ID to ensure we are talking to what we expect */ - buf[0] = MAX3107_REVID_REG; - if (max3107_rw(s, (u8 *)buf, (u8 *)buf, 2)) { - dev_err(&s->spi->dev, "SPI transfer for REVID read failed\n"); - retval = -EIO; - goto err_free1; - } - if ((buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID1 && - (buf[0] & MAX3107_SPI_RX_DATA_MASK) != MAX3107_REVID2) { - dev_err(&s->spi->dev, "REVID %x does not match\n", - (buf[0] & MAX3107_SPI_RX_DATA_MASK)); - retval = -ENODEV; - goto err_free1; - } - - /* Disable all interrupts */ - buf[0] = (MAX3107_WRITE_BIT | MAX3107_IRQEN_REG | 0x0000); - buf[0] |= 0x0000; - - /* Configure clock source */ - buf[1] = (MAX3107_WRITE_BIT | MAX3107_CLKSRC_REG); - if (s->ext_clk) { - /* External clock */ - buf[1] |= MAX3107_CLKSRC_EXTCLK_BIT; - } - - /* PLL bypass ON */ - buf[1] |= MAX3107_CLKSRC_PLLBYP_BIT; - - /* Perform SPI transfer */ - if (max3107_rw(s, (u8 *)buf, NULL, 4)) { - dev_err(&s->spi->dev, "SPI transfer for init failed\n"); - retval = -EIO; - goto err_free1; - } - - /* Register UART driver */ - if (!driver_registered) { - retval = uart_register_driver(&max3107_uart_driver); - if (retval) { - dev_err(&s->spi->dev, "Registering UART driver failed\n"); - goto err_free1; - } - driver_registered = 1; - } - - /* Initialize UART port data */ - s->port.fifosize = 128; - s->port.ops = &max3107_ops; - s->port.line = 0; - s->port.dev = &spi->dev; - s->port.uartclk = 9600; - s->port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; - s->port.irq = s->spi->irq; - s->port.type = PORT_MAX3107; - - /* Add UART port */ - retval = uart_add_one_port(&max3107_uart_driver, &s->port); - if (retval < 0) { - dev_err(&s->spi->dev, "Adding UART port failed\n"); - goto err_free1; - } - - if (pdata->configure) { - retval = pdata->configure(s); - if (retval < 0) - goto err_free1; - } - - /* Go to suspend mode */ - if (pdata->hw_suspend) - pdata->hw_suspend(s, 1); - - return 0; - -err_free1: - kfree(s->txbuf); -err_free2: - kfree(s->rxstr); -err_free3: - kfree(s->rxbuf); -err_free4: - kfree(s); - return retval; -} -EXPORT_SYMBOL_GPL(max3107_probe); - -/* Driver remove function */ -int max3107_remove(struct spi_device *spi) -{ - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_info("enter max3107 remove\n"); - - /* Remove port */ - if (uart_remove_one_port(&max3107_uart_driver, &s->port)) - dev_warn(&s->spi->dev, "Removing UART port failed\n"); - - - /* Free TxRx buffer */ - kfree(s->rxbuf); - kfree(s->rxstr); - kfree(s->txbuf); - - /* Free port structure */ - kfree(s); - - return 0; -} -EXPORT_SYMBOL_GPL(max3107_remove); - -/* Driver suspend function */ -int max3107_suspend(struct spi_device *spi, pm_message_t state) -{ -#ifdef CONFIG_PM - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_debug("enter suspend\n"); - - /* Suspend UART port */ - uart_suspend_port(&max3107_uart_driver, &s->port); - - /* Go to suspend mode */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 1); -#endif /* CONFIG_PM */ - return 0; -} -EXPORT_SYMBOL_GPL(max3107_suspend); - -/* Driver resume function */ -int max3107_resume(struct spi_device *spi) -{ -#ifdef CONFIG_PM - struct max3107_port *s = dev_get_drvdata(&spi->dev); - - pr_debug("enter resume\n"); - - /* Resume from suspend */ - if (s->pdata->hw_suspend) - s->pdata->hw_suspend(s, 0); - - /* Resume UART port */ - uart_resume_port(&max3107_uart_driver, &s->port); -#endif /* CONFIG_PM */ - return 0; -} -EXPORT_SYMBOL_GPL(max3107_resume); - -static int max3107_probe_generic(struct spi_device *spi) -{ - return max3107_probe(spi, &generic_plat_data); -} - -/* Spi driver data */ -static struct spi_driver max3107_driver = { - .driver = { - .name = "max3107", - .owner = THIS_MODULE, - }, - .probe = max3107_probe_generic, - .remove = __devexit_p(max3107_remove), - .suspend = max3107_suspend, - .resume = max3107_resume, -}; - -/* Driver init function */ -static int __init max3107_init(void) -{ - pr_info("enter max3107 init\n"); - return spi_register_driver(&max3107_driver); -} - -/* Driver exit function */ -static void __exit max3107_exit(void) -{ - pr_info("enter max3107 exit\n"); - /* Unregister UART driver */ - if (driver_registered) - uart_unregister_driver(&max3107_uart_driver); - spi_unregister_driver(&max3107_driver); -} - -module_init(max3107_init); -module_exit(max3107_exit); - -MODULE_DESCRIPTION("MAX3107 driver"); -MODULE_AUTHOR("Aavamobile"); -MODULE_ALIAS("spi:max3107"); -MODULE_LICENSE("GPL v2"); diff --git a/drivers/tty/serial/max3107.h b/drivers/tty/serial/max3107.h deleted file mode 100644 index 8415fc723b9..00000000000 --- a/drivers/tty/serial/max3107.h +++ /dev/null @@ -1,441 +0,0 @@ -/* - * max3107.h - spi uart protocol driver header for Maxim 3107 - * - * Copyright (C) Aavamobile 2009 - * Based on serial_max3100.h by Christian Pellegrin - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#ifndef _MAX3107_H -#define _MAX3107_H - -/* Serial error status definitions */ -#define MAX3107_PARITY_ERROR 1 -#define MAX3107_FRAME_ERROR 2 -#define MAX3107_OVERRUN_ERROR 4 -#define MAX3107_ALL_ERRORS (MAX3107_PARITY_ERROR | \ - MAX3107_FRAME_ERROR | \ - MAX3107_OVERRUN_ERROR) - -/* GPIO definitions */ -#define MAX3107_GPIO_BASE 88 -#define MAX3107_GPIO_COUNT 4 - - -/* GPIO connected to chip's reset pin */ -#define MAX3107_RESET_GPIO 87 - - -/* Chip reset delay */ -#define MAX3107_RESET_DELAY 10 - -/* Chip wakeup delay */ -#define MAX3107_WAKEUP_DELAY 50 - - -/* Sleep mode definitions */ -#define MAX3107_DISABLE_FORCED_SLEEP 0 -#define MAX3107_ENABLE_FORCED_SLEEP 1 -#define MAX3107_DISABLE_AUTOSLEEP 2 -#define MAX3107_ENABLE_AUTOSLEEP 3 - - -/* Definitions for register access with SPI transfers - * - * SPI transfer format: - * - * Master to slave bits xzzzzzzzyyyyyyyy - * Slave to master bits aaaaaaaabbbbbbbb - * - * where: - * x = 0 for reads, 1 for writes - * z = register address - * y = new register value if write, 0 if read - * a = unspecified - * b = register value if read, unspecified if write - */ - -/* SPI speed */ -#define MAX3107_SPI_SPEED (3125000 * 2) - -/* Write bit */ -#define MAX3107_WRITE_BIT (1 << 15) - -/* SPI TX data mask */ -#define MAX3107_SPI_RX_DATA_MASK (0x00ff) - -/* SPI RX data mask */ -#define MAX3107_SPI_TX_DATA_MASK (0x00ff) - -/* Register access masks */ -#define MAX3107_RHR_REG (0x0000) /* RX FIFO */ -#define MAX3107_THR_REG (0x0000) /* TX FIFO */ -#define MAX3107_IRQEN_REG (0x0100) /* IRQ enable */ -#define MAX3107_IRQSTS_REG (0x0200) /* IRQ status */ -#define MAX3107_LSR_IRQEN_REG (0x0300) /* LSR IRQ enable */ -#define MAX3107_LSR_IRQSTS_REG (0x0400) /* LSR IRQ status */ -#define MAX3107_SPCHR_IRQEN_REG (0x0500) /* Special char IRQ enable */ -#define MAX3107_SPCHR_IRQSTS_REG (0x0600) /* Special char IRQ status */ -#define MAX3107_STS_IRQEN_REG (0x0700) /* Status IRQ enable */ -#define MAX3107_STS_IRQSTS_REG (0x0800) /* Status IRQ status */ -#define MAX3107_MODE1_REG (0x0900) /* MODE1 */ -#define MAX3107_MODE2_REG (0x0a00) /* MODE2 */ -#define MAX3107_LCR_REG (0x0b00) /* LCR */ -#define MAX3107_RXTO_REG (0x0c00) /* RX timeout */ -#define MAX3107_HDPIXDELAY_REG (0x0d00) /* Auto transceiver delays */ -#define MAX3107_IRDA_REG (0x0e00) /* IRDA settings */ -#define MAX3107_FLOWLVL_REG (0x0f00) /* Flow control levels */ -#define MAX3107_FIFOTRIGLVL_REG (0x1000) /* FIFO IRQ trigger levels */ -#define MAX3107_TXFIFOLVL_REG (0x1100) /* TX FIFO level */ -#define MAX3107_RXFIFOLVL_REG (0x1200) /* RX FIFO level */ -#define MAX3107_FLOWCTRL_REG (0x1300) /* Flow control */ -#define MAX3107_XON1_REG (0x1400) /* XON1 character */ -#define MAX3107_XON2_REG (0x1500) /* XON2 character */ -#define MAX3107_XOFF1_REG (0x1600) /* XOFF1 character */ -#define MAX3107_XOFF2_REG (0x1700) /* XOFF2 character */ -#define MAX3107_GPIOCFG_REG (0x1800) /* GPIO config */ -#define MAX3107_GPIODATA_REG (0x1900) /* GPIO data */ -#define MAX3107_PLLCFG_REG (0x1a00) /* PLL config */ -#define MAX3107_BRGCFG_REG (0x1b00) /* Baud rate generator conf */ -#define MAX3107_BRGDIVLSB_REG (0x1c00) /* Baud rate divisor LSB */ -#define MAX3107_BRGDIVMSB_REG (0x1d00) /* Baud rate divisor MSB */ -#define MAX3107_CLKSRC_REG (0x1e00) /* Clock source */ -#define MAX3107_REVID_REG (0x1f00) /* Revision identification */ - -/* IRQ register bits */ -#define MAX3107_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ -#define MAX3107_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ -#define MAX3107_IRQ_STS_BIT (1 << 2) /* Status interrupt */ -#define MAX3107_IRQ_RXFIFO_BIT (1 << 3) /* RX FIFO interrupt */ -#define MAX3107_IRQ_TXFIFO_BIT (1 << 4) /* TX FIFO interrupt */ -#define MAX3107_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */ -#define MAX3107_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */ -#define MAX3107_IRQ_CTS_BIT (1 << 7) /* CTS interrupt */ - -/* LSR register bits */ -#define MAX3107_LSR_RXTO_BIT (1 << 0) /* RX timeout */ -#define MAX3107_LSR_RXOVR_BIT (1 << 1) /* RX overrun */ -#define MAX3107_LSR_RXPAR_BIT (1 << 2) /* RX parity error */ -#define MAX3107_LSR_FRERR_BIT (1 << 3) /* Frame error */ -#define MAX3107_LSR_RXBRK_BIT (1 << 4) /* RX break */ -#define MAX3107_LSR_RXNOISE_BIT (1 << 5) /* RX noise */ -#define MAX3107_LSR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_LSR_CTS_BIT (1 << 7) /* CTS pin state */ - -/* Special character register bits */ -#define MAX3107_SPCHR_XON1_BIT (1 << 0) /* XON1 character */ -#define MAX3107_SPCHR_XON2_BIT (1 << 1) /* XON2 character */ -#define MAX3107_SPCHR_XOFF1_BIT (1 << 2) /* XOFF1 character */ -#define MAX3107_SPCHR_XOFF2_BIT (1 << 3) /* XOFF2 character */ -#define MAX3107_SPCHR_BREAK_BIT (1 << 4) /* RX break */ -#define MAX3107_SPCHR_MULTIDROP_BIT (1 << 5) /* 9-bit multidrop addr char */ -#define MAX3107_SPCHR_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_SPCHR_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Status register bits */ -#define MAX3107_STS_GPIO0_BIT (1 << 0) /* GPIO 0 interrupt */ -#define MAX3107_STS_GPIO1_BIT (1 << 1) /* GPIO 1 interrupt */ -#define MAX3107_STS_GPIO2_BIT (1 << 2) /* GPIO 2 interrupt */ -#define MAX3107_STS_GPIO3_BIT (1 << 3) /* GPIO 3 interrupt */ -#define MAX3107_STS_UNDEF4_BIT (1 << 4) /* Undefined/not used */ -#define MAX3107_STS_CLKREADY_BIT (1 << 5) /* Clock ready */ -#define MAX3107_STS_SLEEP_BIT (1 << 6) /* Sleep interrupt */ -#define MAX3107_STS_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* MODE1 register bits */ -#define MAX3107_MODE1_RXDIS_BIT (1 << 0) /* RX disable */ -#define MAX3107_MODE1_TXDIS_BIT (1 << 1) /* TX disable */ -#define MAX3107_MODE1_TXHIZ_BIT (1 << 2) /* TX pin three-state */ -#define MAX3107_MODE1_RTSHIZ_BIT (1 << 3) /* RTS pin three-state */ -#define MAX3107_MODE1_TRNSCVCTRL_BIT (1 << 4) /* Transceiver ctrl enable */ -#define MAX3107_MODE1_FORCESLEEP_BIT (1 << 5) /* Force sleep mode */ -#define MAX3107_MODE1_AUTOSLEEP_BIT (1 << 6) /* Auto sleep enable */ -#define MAX3107_MODE1_IRQSEL_BIT (1 << 7) /* IRQ pin enable */ - -/* MODE2 register bits */ -#define MAX3107_MODE2_RST_BIT (1 << 0) /* Chip reset */ -#define MAX3107_MODE2_FIFORST_BIT (1 << 1) /* FIFO reset */ -#define MAX3107_MODE2_RXTRIGINV_BIT (1 << 2) /* RX FIFO INT invert */ -#define MAX3107_MODE2_RXEMPTINV_BIT (1 << 3) /* RX FIFO empty INT invert */ -#define MAX3107_MODE2_SPCHR_BIT (1 << 4) /* Special chr detect enable */ -#define MAX3107_MODE2_LOOPBACK_BIT (1 << 5) /* Internal loopback enable */ -#define MAX3107_MODE2_MULTIDROP_BIT (1 << 6) /* 9-bit multidrop enable */ -#define MAX3107_MODE2_ECHOSUPR_BIT (1 << 7) /* ECHO suppression enable */ - -/* LCR register bits */ -#define MAX3107_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */ -#define MAX3107_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1 - * - * Word length bits table: - * 00 -> 5 bit words - * 01 -> 6 bit words - * 10 -> 7 bit words - * 11 -> 8 bit words - */ -#define MAX3107_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit - * - * STOP length bit table: - * 0 -> 1 stop bit - * 1 -> 1-1.5 stop bits if - * word length is 5, - * 2 stop bits otherwise - */ -#define MAX3107_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */ -#define MAX3107_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */ -#define MAX3107_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ -#define MAX3107_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ -#define MAX3107_LCR_RTS_BIT (1 << 7) /* RTS pin control */ -#define MAX3107_LCR_WORD_LEN_5 (0x0000) -#define MAX3107_LCR_WORD_LEN_6 (0x0001) -#define MAX3107_LCR_WORD_LEN_7 (0x0002) -#define MAX3107_LCR_WORD_LEN_8 (0x0003) - - -/* IRDA register bits */ -#define MAX3107_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ -#define MAX3107_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ -#define MAX3107_IRDA_SHORTIR_BIT (1 << 2) /* Short SIR mode enable */ -#define MAX3107_IRDA_MIR_BIT (1 << 3) /* MIR mode enable */ -#define MAX3107_IRDA_RXINV_BIT (1 << 4) /* RX logic inversion enable */ -#define MAX3107_IRDA_TXINV_BIT (1 << 5) /* TX logic inversion enable */ -#define MAX3107_IRDA_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_IRDA_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Flow control trigger level register masks */ -#define MAX3107_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ -#define MAX3107_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ -#define MAX3107_FLOWLVL_HALT(words) ((words/8) & 0x000f) -#define MAX3107_FLOWLVL_RES(words) (((words/8) & 0x000f) << 4) - -/* FIFO interrupt trigger level register masks */ -#define MAX3107_FIFOTRIGLVL_TX_MASK (0x000f) /* TX FIFO trigger level */ -#define MAX3107_FIFOTRIGLVL_RX_MASK (0x00f0) /* RX FIFO trigger level */ -#define MAX3107_FIFOTRIGLVL_TX(words) ((words/8) & 0x000f) -#define MAX3107_FIFOTRIGLVL_RX(words) (((words/8) & 0x000f) << 4) - -/* Flow control register bits */ -#define MAX3107_FLOWCTRL_AUTORTS_BIT (1 << 0) /* Auto RTS flow ctrl enable */ -#define MAX3107_FLOWCTRL_AUTOCTS_BIT (1 << 1) /* Auto CTS flow ctrl enable */ -#define MAX3107_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs - * are used in conjunction with - * XOFF2 for definition of - * special character */ -#define MAX3107_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ -#define MAX3107_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ -#define MAX3107_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 - * - * SWFLOW bits 1 & 0 table: - * 00 -> no transmitter flow - * control - * 01 -> receiver compares - * XON2 and XOFF2 - * and controls - * transmitter - * 10 -> receiver compares - * XON1 and XOFF1 - * and controls - * transmitter - * 11 -> receiver compares - * XON1, XON2, XOFF1 and - * XOFF2 and controls - * transmitter - */ -#define MAX3107_FLOWCTRL_SWFLOW2_BIT (1 << 6) /* SWFLOW bit 2 */ -#define MAX3107_FLOWCTRL_SWFLOW3_BIT (1 << 7) /* SWFLOW bit 3 - * - * SWFLOW bits 3 & 2 table: - * 00 -> no received flow - * control - * 01 -> transmitter generates - * XON2 and XOFF2 - * 10 -> transmitter generates - * XON1 and XOFF1 - * 11 -> transmitter generates - * XON1, XON2, XOFF1 and - * XOFF2 - */ - -/* GPIO configuration register bits */ -#define MAX3107_GPIOCFG_GP0OUT_BIT (1 << 0) /* GPIO 0 output enable */ -#define MAX3107_GPIOCFG_GP1OUT_BIT (1 << 1) /* GPIO 1 output enable */ -#define MAX3107_GPIOCFG_GP2OUT_BIT (1 << 2) /* GPIO 2 output enable */ -#define MAX3107_GPIOCFG_GP3OUT_BIT (1 << 3) /* GPIO 3 output enable */ -#define MAX3107_GPIOCFG_GP0OD_BIT (1 << 4) /* GPIO 0 open-drain enable */ -#define MAX3107_GPIOCFG_GP1OD_BIT (1 << 5) /* GPIO 1 open-drain enable */ -#define MAX3107_GPIOCFG_GP2OD_BIT (1 << 6) /* GPIO 2 open-drain enable */ -#define MAX3107_GPIOCFG_GP3OD_BIT (1 << 7) /* GPIO 3 open-drain enable */ - -/* GPIO DATA register bits */ -#define MAX3107_GPIODATA_GP0OUT_BIT (1 << 0) /* GPIO 0 output value */ -#define MAX3107_GPIODATA_GP1OUT_BIT (1 << 1) /* GPIO 1 output value */ -#define MAX3107_GPIODATA_GP2OUT_BIT (1 << 2) /* GPIO 2 output value */ -#define MAX3107_GPIODATA_GP3OUT_BIT (1 << 3) /* GPIO 3 output value */ -#define MAX3107_GPIODATA_GP0IN_BIT (1 << 4) /* GPIO 0 input value */ -#define MAX3107_GPIODATA_GP1IN_BIT (1 << 5) /* GPIO 1 input value */ -#define MAX3107_GPIODATA_GP2IN_BIT (1 << 6) /* GPIO 2 input value */ -#define MAX3107_GPIODATA_GP3IN_BIT (1 << 7) /* GPIO 3 input value */ - -/* PLL configuration register masks */ -#define MAX3107_PLLCFG_PREDIV_MASK (0x003f) /* PLL predivision value */ -#define MAX3107_PLLCFG_PLLFACTOR_MASK (0x00c0) /* PLL multiplication factor */ - -/* Baud rate generator configuration register masks and bits */ -#define MAX3107_BRGCFG_FRACT_MASK (0x000f) /* Fractional portion of - * Baud rate generator divisor - */ -#define MAX3107_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ -#define MAX3107_BRGCFG_4XMODE_BIT (1 << 5) /* Quadruple baud rate */ -#define MAX3107_BRGCFG_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_BRGCFG_UNDEF7_BIT (1 << 7) /* Undefined/not used */ - -/* Clock source register bits */ -#define MAX3107_CLKSRC_INTOSC_BIT (1 << 0) /* Internal osc enable */ -#define MAX3107_CLKSRC_CRYST_BIT (1 << 1) /* Crystal osc enable */ -#define MAX3107_CLKSRC_PLL_BIT (1 << 2) /* PLL enable */ -#define MAX3107_CLKSRC_PLLBYP_BIT (1 << 3) /* PLL bypass */ -#define MAX3107_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ -#define MAX3107_CLKSRC_UNDEF5_BIT (1 << 5) /* Undefined/not used */ -#define MAX3107_CLKSRC_UNDEF6_BIT (1 << 6) /* Undefined/not used */ -#define MAX3107_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ - - -/* HW definitions */ -#define MAX3107_RX_FIFO_SIZE 128 -#define MAX3107_TX_FIFO_SIZE 128 -#define MAX3107_REVID1 0x00a0 -#define MAX3107_REVID2 0x00a1 - - -/* Baud rate generator configuration values for external clock 13MHz */ -#define MAX3107_BRG13_B300 (0x0A9400 | 0x05) -#define MAX3107_BRG13_B600 (0x054A00 | 0x03) -#define MAX3107_BRG13_B1200 (0x02A500 | 0x01) -#define MAX3107_BRG13_B2400 (0x015200 | 0x09) -#define MAX3107_BRG13_B4800 (0x00A900 | 0x04) -#define MAX3107_BRG13_B9600 (0x005400 | 0x0A) -#define MAX3107_BRG13_B19200 (0x002A00 | 0x05) -#define MAX3107_BRG13_B38400 (0x001500 | 0x03) -#define MAX3107_BRG13_B57600 (0x000E00 | 0x02) -#define MAX3107_BRG13_B115200 (0x000700 | 0x01) -#define MAX3107_BRG13_B230400 (0x000300 | 0x08) -#define MAX3107_BRG13_B460800 (0x000100 | 0x0c) -#define MAX3107_BRG13_B921600 (0x000100 | 0x1c) - -/* Baud rate generator configuration values for external clock 26MHz */ -#define MAX3107_BRG26_B300 (0x152800 | 0x0A) -#define MAX3107_BRG26_B600 (0x0A9400 | 0x05) -#define MAX3107_BRG26_B1200 (0x054A00 | 0x03) -#define MAX3107_BRG26_B2400 (0x02A500 | 0x01) -#define MAX3107_BRG26_B4800 (0x015200 | 0x09) -#define MAX3107_BRG26_B9600 (0x00A900 | 0x04) -#define MAX3107_BRG26_B19200 (0x005400 | 0x0A) -#define MAX3107_BRG26_B38400 (0x002A00 | 0x05) -#define MAX3107_BRG26_B57600 (0x001C00 | 0x03) -#define MAX3107_BRG26_B115200 (0x000E00 | 0x02) -#define MAX3107_BRG26_B230400 (0x000700 | 0x01) -#define MAX3107_BRG26_B460800 (0x000300 | 0x08) -#define MAX3107_BRG26_B921600 (0x000100 | 0x0C) - -/* Baud rate generator configuration values for internal clock */ -#define MAX3107_BRG13_IB300 (0x008000 | 0x00) -#define MAX3107_BRG13_IB600 (0x004000 | 0x00) -#define MAX3107_BRG13_IB1200 (0x002000 | 0x00) -#define MAX3107_BRG13_IB2400 (0x001000 | 0x00) -#define MAX3107_BRG13_IB4800 (0x000800 | 0x00) -#define MAX3107_BRG13_IB9600 (0x000400 | 0x00) -#define MAX3107_BRG13_IB19200 (0x000200 | 0x00) -#define MAX3107_BRG13_IB38400 (0x000100 | 0x00) -#define MAX3107_BRG13_IB57600 (0x000000 | 0x0B) -#define MAX3107_BRG13_IB115200 (0x000000 | 0x05) -#define MAX3107_BRG13_IB230400 (0x000000 | 0x03) -#define MAX3107_BRG13_IB460800 (0x000000 | 0x00) -#define MAX3107_BRG13_IB921600 (0x000000 | 0x00) - - -struct baud_table { - int baud; - u32 new_brg; -}; - -struct max3107_port { - /* UART port structure */ - struct uart_port port; - - /* SPI device structure */ - struct spi_device *spi; - -#if defined(CONFIG_GPIOLIB) - /* GPIO chip structure */ - struct gpio_chip chip; -#endif - - /* Workqueue that does all the magic */ - struct workqueue_struct *workqueue; - struct work_struct work; - - /* Lock for shared data */ - spinlock_t data_lock; - - /* Device configuration */ - int ext_clk; /* 1 if external clock used */ - int loopback; /* Current loopback mode state */ - int baud; /* Current baud rate */ - - /* State flags */ - int suspended; /* Indicates suspend mode */ - int tx_fifo_empty; /* Flag for TX FIFO state */ - int rx_enabled; /* Flag for receiver state */ - int tx_enabled; /* Flag for transmitter state */ - - u16 irqen_reg; /* Current IRQ enable register value */ - /* Shared data */ - u16 mode1_reg; /* Current mode1 register value*/ - int mode1_commit; /* Flag for setting new mode1 register value */ - u16 lcr_reg; /* Current LCR register value */ - int lcr_commit; /* Flag for setting new LCR register value */ - u32 brg_cfg; /* Current Baud rate generator config */ - int brg_commit; /* Flag for setting new baud rate generator - * config - */ - struct baud_table *baud_tbl; - int handle_irq; /* Indicates that IRQ should be handled */ - - /* Rx buffer and str*/ - u16 *rxbuf; - u8 *rxstr; - /* Tx buffer*/ - u16 *txbuf; - - struct max3107_plat *pdata; /* Platform data */ -}; - -/* Platform data structure */ -struct max3107_plat { - /* Loopback mode enable */ - int loopback; - /* External clock enable */ - int ext_clk; - /* Called during the register initialisation */ - void (*init)(struct max3107_port *s); - /* Called when the port is found and configured */ - int (*configure)(struct max3107_port *s); - /* HW suspend function */ - void (*hw_suspend) (struct max3107_port *s, int suspend); - /* Polling mode enable */ - int polled_mode; - /* Polling period if polling mode enabled */ - int poll_time; -}; - -extern int max3107_rw(struct max3107_port *s, u8 *tx, u8 *rx, int len); -extern void max3107_hw_susp(struct max3107_port *s, int suspend); -extern int max3107_probe(struct spi_device *spi, struct max3107_plat *pdata); -extern int max3107_remove(struct spi_device *spi); -extern int max3107_suspend(struct spi_device *spi, pm_message_t state); -extern int max3107_resume(struct spi_device *spi); - -#endif /* _LINUX_SERIAL_MAX3107_H */ diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c new file mode 100644 index 00000000000..534e44851b7 --- /dev/null +++ b/drivers/tty/serial/max310x.c @@ -0,0 +1,1259 @@ +/* + * Maxim (Dallas) MAX3107/8 serial driver + * + * Copyright (C) 2012 Alexander Shiyan + * + * Based on max3100.c, by Christian Pellegrin + * Based on max3110.c, by Feng Tang + * Based on max3107.c, by Aavamobile + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +/* TODO: MAX3109 support (Dual) */ +/* TODO: MAX14830 support (Quad) */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX310X_MAJOR 204 +#define MAX310X_MINOR 209 + +/* MAX310X register definitions */ +#define MAX310X_RHR_REG (0x00) /* RX FIFO */ +#define MAX310X_THR_REG (0x00) /* TX FIFO */ +#define MAX310X_IRQEN_REG (0x01) /* IRQ enable */ +#define MAX310X_IRQSTS_REG (0x02) /* IRQ status */ +#define MAX310X_LSR_IRQEN_REG (0x03) /* LSR IRQ enable */ +#define MAX310X_LSR_IRQSTS_REG (0x04) /* LSR IRQ status */ +#define MAX310X_SPCHR_IRQEN_REG (0x05) /* Special char IRQ enable */ +#define MAX310X_SPCHR_IRQSTS_REG (0x06) /* Special char IRQ status */ +#define MAX310X_STS_IRQEN_REG (0x07) /* Status IRQ enable */ +#define MAX310X_STS_IRQSTS_REG (0x08) /* Status IRQ status */ +#define MAX310X_MODE1_REG (0x09) /* MODE1 */ +#define MAX310X_MODE2_REG (0x0a) /* MODE2 */ +#define MAX310X_LCR_REG (0x0b) /* LCR */ +#define MAX310X_RXTO_REG (0x0c) /* RX timeout */ +#define MAX310X_HDPIXDELAY_REG (0x0d) /* Auto transceiver delays */ +#define MAX310X_IRDA_REG (0x0e) /* IRDA settings */ +#define MAX310X_FLOWLVL_REG (0x0f) /* Flow control levels */ +#define MAX310X_FIFOTRIGLVL_REG (0x10) /* FIFO IRQ trigger levels */ +#define MAX310X_TXFIFOLVL_REG (0x11) /* TX FIFO level */ +#define MAX310X_RXFIFOLVL_REG (0x12) /* RX FIFO level */ +#define MAX310X_FLOWCTRL_REG (0x13) /* Flow control */ +#define MAX310X_XON1_REG (0x14) /* XON1 character */ +#define MAX310X_XON2_REG (0x15) /* XON2 character */ +#define MAX310X_XOFF1_REG (0x16) /* XOFF1 character */ +#define MAX310X_XOFF2_REG (0x17) /* XOFF2 character */ +#define MAX310X_GPIOCFG_REG (0x18) /* GPIO config */ +#define MAX310X_GPIODATA_REG (0x19) /* GPIO data */ +#define MAX310X_PLLCFG_REG (0x1a) /* PLL config */ +#define MAX310X_BRGCFG_REG (0x1b) /* Baud rate generator conf */ +#define MAX310X_BRGDIVLSB_REG (0x1c) /* Baud rate divisor LSB */ +#define MAX310X_BRGDIVMSB_REG (0x1d) /* Baud rate divisor MSB */ +#define MAX310X_CLKSRC_REG (0x1e) /* Clock source */ +/* Only present in MAX3107 */ +#define MAX3107_REVID_REG (0x1f) /* Revision identification */ + +/* IRQ register bits */ +#define MAX310X_IRQ_LSR_BIT (1 << 0) /* LSR interrupt */ +#define MAX310X_IRQ_SPCHR_BIT (1 << 1) /* Special char interrupt */ +#define MAX310X_IRQ_STS_BIT (1 << 2) /* Status interrupt */ +#define MAX310X_IRQ_RXFIFO_BIT (1 << 3) /* RX FIFO interrupt */ +#define MAX310X_IRQ_TXFIFO_BIT (1 << 4) /* TX FIFO interrupt */ +#define MAX310X_IRQ_TXEMPTY_BIT (1 << 5) /* TX FIFO empty interrupt */ +#define MAX310X_IRQ_RXEMPTY_BIT (1 << 6) /* RX FIFO empty interrupt */ +#define MAX310X_IRQ_CTS_BIT (1 << 7) /* CTS interrupt */ + +/* LSR register bits */ +#define MAX310X_LSR_RXTO_BIT (1 << 0) /* RX timeout */ +#define MAX310X_LSR_RXOVR_BIT (1 << 1) /* RX overrun */ +#define MAX310X_LSR_RXPAR_BIT (1 << 2) /* RX parity error */ +#define MAX310X_LSR_FRERR_BIT (1 << 3) /* Frame error */ +#define MAX310X_LSR_RXBRK_BIT (1 << 4) /* RX break */ +#define MAX310X_LSR_RXNOISE_BIT (1 << 5) /* RX noise */ +#define MAX310X_LSR_CTS_BIT (1 << 7) /* CTS pin state */ + +/* Special character register bits */ +#define MAX310X_SPCHR_XON1_BIT (1 << 0) /* XON1 character */ +#define MAX310X_SPCHR_XON2_BIT (1 << 1) /* XON2 character */ +#define MAX310X_SPCHR_XOFF1_BIT (1 << 2) /* XOFF1 character */ +#define MAX310X_SPCHR_XOFF2_BIT (1 << 3) /* XOFF2 character */ +#define MAX310X_SPCHR_BREAK_BIT (1 << 4) /* RX break */ +#define MAX310X_SPCHR_MULTIDROP_BIT (1 << 5) /* 9-bit multidrop addr char */ + +/* Status register bits */ +#define MAX310X_STS_GPIO0_BIT (1 << 0) /* GPIO 0 interrupt */ +#define MAX310X_STS_GPIO1_BIT (1 << 1) /* GPIO 1 interrupt */ +#define MAX310X_STS_GPIO2_BIT (1 << 2) /* GPIO 2 interrupt */ +#define MAX310X_STS_GPIO3_BIT (1 << 3) /* GPIO 3 interrupt */ +#define MAX310X_STS_CLKREADY_BIT (1 << 5) /* Clock ready */ +#define MAX310X_STS_SLEEP_BIT (1 << 6) /* Sleep interrupt */ + +/* MODE1 register bits */ +#define MAX310X_MODE1_RXDIS_BIT (1 << 0) /* RX disable */ +#define MAX310X_MODE1_TXDIS_BIT (1 << 1) /* TX disable */ +#define MAX310X_MODE1_TXHIZ_BIT (1 << 2) /* TX pin three-state */ +#define MAX310X_MODE1_RTSHIZ_BIT (1 << 3) /* RTS pin three-state */ +#define MAX310X_MODE1_TRNSCVCTRL_BIT (1 << 4) /* Transceiver ctrl enable */ +#define MAX310X_MODE1_FORCESLEEP_BIT (1 << 5) /* Force sleep mode */ +#define MAX310X_MODE1_AUTOSLEEP_BIT (1 << 6) /* Auto sleep enable */ +#define MAX310X_MODE1_IRQSEL_BIT (1 << 7) /* IRQ pin enable */ + +/* MODE2 register bits */ +#define MAX310X_MODE2_RST_BIT (1 << 0) /* Chip reset */ +#define MAX310X_MODE2_FIFORST_BIT (1 << 1) /* FIFO reset */ +#define MAX310X_MODE2_RXTRIGINV_BIT (1 << 2) /* RX FIFO INT invert */ +#define MAX310X_MODE2_RXEMPTINV_BIT (1 << 3) /* RX FIFO empty INT invert */ +#define MAX310X_MODE2_SPCHR_BIT (1 << 4) /* Special chr detect enable */ +#define MAX310X_MODE2_LOOPBACK_BIT (1 << 5) /* Internal loopback enable */ +#define MAX310X_MODE2_MULTIDROP_BIT (1 << 6) /* 9-bit multidrop enable */ +#define MAX310X_MODE2_ECHOSUPR_BIT (1 << 7) /* ECHO suppression enable */ + +/* LCR register bits */ +#define MAX310X_LCR_LENGTH0_BIT (1 << 0) /* Word length bit 0 */ +#define MAX310X_LCR_LENGTH1_BIT (1 << 1) /* Word length bit 1 + * + * Word length bits table: + * 00 -> 5 bit words + * 01 -> 6 bit words + * 10 -> 7 bit words + * 11 -> 8 bit words + */ +#define MAX310X_LCR_STOPLEN_BIT (1 << 2) /* STOP length bit + * + * STOP length bit table: + * 0 -> 1 stop bit + * 1 -> 1-1.5 stop bits if + * word length is 5, + * 2 stop bits otherwise + */ +#define MAX310X_LCR_PARITY_BIT (1 << 3) /* Parity bit enable */ +#define MAX310X_LCR_EVENPARITY_BIT (1 << 4) /* Even parity bit enable */ +#define MAX310X_LCR_FORCEPARITY_BIT (1 << 5) /* 9-bit multidrop parity */ +#define MAX310X_LCR_TXBREAK_BIT (1 << 6) /* TX break enable */ +#define MAX310X_LCR_RTS_BIT (1 << 7) /* RTS pin control */ +#define MAX310X_LCR_WORD_LEN_5 (0x00) +#define MAX310X_LCR_WORD_LEN_6 (0x01) +#define MAX310X_LCR_WORD_LEN_7 (0x02) +#define MAX310X_LCR_WORD_LEN_8 (0x03) + +/* IRDA register bits */ +#define MAX310X_IRDA_IRDAEN_BIT (1 << 0) /* IRDA mode enable */ +#define MAX310X_IRDA_SIR_BIT (1 << 1) /* SIR mode enable */ +#define MAX310X_IRDA_SHORTIR_BIT (1 << 2) /* Short SIR mode enable */ +#define MAX310X_IRDA_MIR_BIT (1 << 3) /* MIR mode enable */ +#define MAX310X_IRDA_RXINV_BIT (1 << 4) /* RX logic inversion enable */ +#define MAX310X_IRDA_TXINV_BIT (1 << 5) /* TX logic inversion enable */ + +/* Flow control trigger level register masks */ +#define MAX310X_FLOWLVL_HALT_MASK (0x000f) /* Flow control halt level */ +#define MAX310X_FLOWLVL_RES_MASK (0x00f0) /* Flow control resume level */ +#define MAX310X_FLOWLVL_HALT(words) ((words / 8) & 0x0f) +#define MAX310X_FLOWLVL_RES(words) (((words / 8) & 0x0f) << 4) + +/* FIFO interrupt trigger level register masks */ +#define MAX310X_FIFOTRIGLVL_TX_MASK (0x0f) /* TX FIFO trigger level */ +#define MAX310X_FIFOTRIGLVL_RX_MASK (0xf0) /* RX FIFO trigger level */ +#define MAX310X_FIFOTRIGLVL_TX(words) ((words / 8) & 0x0f) +#define MAX310X_FIFOTRIGLVL_RX(words) (((words / 8) & 0x0f) << 4) + +/* Flow control register bits */ +#define MAX310X_FLOWCTRL_AUTORTS_BIT (1 << 0) /* Auto RTS flow ctrl enable */ +#define MAX310X_FLOWCTRL_AUTOCTS_BIT (1 << 1) /* Auto CTS flow ctrl enable */ +#define MAX310X_FLOWCTRL_GPIADDR_BIT (1 << 2) /* Enables that GPIO inputs + * are used in conjunction with + * XOFF2 for definition of + * special character */ +#define MAX310X_FLOWCTRL_SWFLOWEN_BIT (1 << 3) /* Auto SW flow ctrl enable */ +#define MAX310X_FLOWCTRL_SWFLOW0_BIT (1 << 4) /* SWFLOW bit 0 */ +#define MAX310X_FLOWCTRL_SWFLOW1_BIT (1 << 5) /* SWFLOW bit 1 + * + * SWFLOW bits 1 & 0 table: + * 00 -> no transmitter flow + * control + * 01 -> receiver compares + * XON2 and XOFF2 + * and controls + * transmitter + * 10 -> receiver compares + * XON1 and XOFF1 + * and controls + * transmitter + * 11 -> receiver compares + * XON1, XON2, XOFF1 and + * XOFF2 and controls + * transmitter + */ +#define MAX310X_FLOWCTRL_SWFLOW2_BIT (1 << 6) /* SWFLOW bit 2 */ +#define MAX310X_FLOWCTRL_SWFLOW3_BIT (1 << 7) /* SWFLOW bit 3 + * + * SWFLOW bits 3 & 2 table: + * 00 -> no received flow + * control + * 01 -> transmitter generates + * XON2 and XOFF2 + * 10 -> transmitter generates + * XON1 and XOFF1 + * 11 -> transmitter generates + * XON1, XON2, XOFF1 and + * XOFF2 + */ + +/* GPIO configuration register bits */ +#define MAX310X_GPIOCFG_GP0OUT_BIT (1 << 0) /* GPIO 0 output enable */ +#define MAX310X_GPIOCFG_GP1OUT_BIT (1 << 1) /* GPIO 1 output enable */ +#define MAX310X_GPIOCFG_GP2OUT_BIT (1 << 2) /* GPIO 2 output enable */ +#define MAX310X_GPIOCFG_GP3OUT_BIT (1 << 3) /* GPIO 3 output enable */ +#define MAX310X_GPIOCFG_GP0OD_BIT (1 << 4) /* GPIO 0 open-drain enable */ +#define MAX310X_GPIOCFG_GP1OD_BIT (1 << 5) /* GPIO 1 open-drain enable */ +#define MAX310X_GPIOCFG_GP2OD_BIT (1 << 6) /* GPIO 2 open-drain enable */ +#define MAX310X_GPIOCFG_GP3OD_BIT (1 << 7) /* GPIO 3 open-drain enable */ + +/* GPIO DATA register bits */ +#define MAX310X_GPIODATA_GP0OUT_BIT (1 << 0) /* GPIO 0 output value */ +#define MAX310X_GPIODATA_GP1OUT_BIT (1 << 1) /* GPIO 1 output value */ +#define MAX310X_GPIODATA_GP2OUT_BIT (1 << 2) /* GPIO 2 output value */ +#define MAX310X_GPIODATA_GP3OUT_BIT (1 << 3) /* GPIO 3 output value */ +#define MAX310X_GPIODATA_GP0IN_BIT (1 << 4) /* GPIO 0 input value */ +#define MAX310X_GPIODATA_GP1IN_BIT (1 << 5) /* GPIO 1 input value */ +#define MAX310X_GPIODATA_GP2IN_BIT (1 << 6) /* GPIO 2 input value */ +#define MAX310X_GPIODATA_GP3IN_BIT (1 << 7) /* GPIO 3 input value */ + +/* PLL configuration register masks */ +#define MAX310X_PLLCFG_PREDIV_MASK (0x3f) /* PLL predivision value */ +#define MAX310X_PLLCFG_PLLFACTOR_MASK (0xc0) /* PLL multiplication factor */ + +/* Baud rate generator configuration register bits */ +#define MAX310X_BRGCFG_2XMODE_BIT (1 << 4) /* Double baud rate */ +#define MAX310X_BRGCFG_4XMODE_BIT (1 << 5) /* Quadruple baud rate */ + +/* Clock source register bits */ +#define MAX310X_CLKSRC_CRYST_BIT (1 << 1) /* Crystal osc enable */ +#define MAX310X_CLKSRC_PLL_BIT (1 << 2) /* PLL enable */ +#define MAX310X_CLKSRC_PLLBYP_BIT (1 << 3) /* PLL bypass */ +#define MAX310X_CLKSRC_EXTCLK_BIT (1 << 4) /* External clock enable */ +#define MAX310X_CLKSRC_CLK2RTS_BIT (1 << 7) /* Baud clk to RTS pin */ + +/* Misc definitions */ +#define MAX310X_FIFO_SIZE (128) + +/* MAX3107 specific */ +#define MAX3107_REV_ID (0xa0) +#define MAX3107_REV_MASK (0xfe) + +/* IRQ status bits definitions */ +#define MAX310X_IRQ_TX (MAX310X_IRQ_TXFIFO_BIT | \ + MAX310X_IRQ_TXEMPTY_BIT) +#define MAX310X_IRQ_RX (MAX310X_IRQ_RXFIFO_BIT | \ + MAX310X_IRQ_RXEMPTY_BIT) + +/* Supported chip types */ +enum { + MAX310X_TYPE_MAX3107 = 3107, + MAX310X_TYPE_MAX3108 = 3108, +}; + +struct max310x_port { + struct uart_driver uart; + struct uart_port port; + + const char *name; + int uartclk; + + unsigned int nr_gpio; +#ifdef CONFIG_GPIOLIB + struct gpio_chip gpio; +#endif + + struct regmap *regmap; + struct regmap_config regcfg; + + struct workqueue_struct *wq; + struct work_struct tx_work; + + struct mutex max310x_mutex; + + struct max310x_pdata *pdata; +}; + +static bool max3107_8_reg_writeable(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX310X_IRQSTS_REG: + case MAX310X_LSR_IRQSTS_REG: + case MAX310X_SPCHR_IRQSTS_REG: + case MAX310X_STS_IRQSTS_REG: + case MAX310X_TXFIFOLVL_REG: + case MAX310X_RXFIFOLVL_REG: + case MAX3107_REVID_REG: /* Only available on MAX3107 */ + return false; + default: + break; + } + + return true; +} + +static bool max310x_reg_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX310X_RHR_REG: + case MAX310X_IRQSTS_REG: + case MAX310X_LSR_IRQSTS_REG: + case MAX310X_SPCHR_IRQSTS_REG: + case MAX310X_STS_IRQSTS_REG: + case MAX310X_TXFIFOLVL_REG: + case MAX310X_RXFIFOLVL_REG: + case MAX310X_GPIODATA_REG: + return true; + default: + break; + } + + return false; +} + +static bool max310x_reg_precious(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MAX310X_RHR_REG: + case MAX310X_IRQSTS_REG: + case MAX310X_SPCHR_IRQSTS_REG: + case MAX310X_STS_IRQSTS_REG: + return true; + default: + break; + } + + return false; +} + +static void max310x_set_baud(struct max310x_port *s, int baud) +{ + unsigned int mode = 0, div = s->uartclk / baud; + + if (!(div / 16)) { + /* Mode x2 */ + mode = MAX310X_BRGCFG_2XMODE_BIT; + div = (s->uartclk * 2) / baud; + } + + if (!(div / 16)) { + /* Mode x4 */ + mode = MAX310X_BRGCFG_4XMODE_BIT; + div = (s->uartclk * 4) / baud; + } + + regmap_write(s->regmap, MAX310X_BRGDIVMSB_REG, + ((div / 16) >> 8) & 0xff); + regmap_write(s->regmap, MAX310X_BRGDIVLSB_REG, (div / 16) & 0xff); + regmap_write(s->regmap, MAX310X_BRGCFG_REG, (div % 16) | mode); +} + +static void max310x_wait_pll(struct max310x_port *s) +{ + int tryes = 1000; + + /* Wait for PLL only if crystal is used */ + if (!(s->pdata->driver_flags & MAX310X_EXT_CLK)) { + unsigned int sts = 0; + + while (tryes--) { + regmap_read(s->regmap, MAX310X_STS_IRQSTS_REG, &sts); + if (sts & MAX310X_STS_CLKREADY_BIT) + break; + } + } +} + +static int __devinit max310x_update_best_err(unsigned long f, long *besterr) +{ + /* Use baudrate 115200 for calculate error */ + long err = f % (115200 * 16); + + if ((*besterr < 0) || (*besterr > err)) { + *besterr = err; + return 0; + } + + return 1; +} + +static int __devinit max310x_set_ref_clk(struct max310x_port *s) +{ + unsigned int div, clksrc, pllcfg = 0; + long besterr = -1; + unsigned long fdiv, fmul, bestfreq = s->pdata->frequency; + + /* First, update error without PLL */ + max310x_update_best_err(s->pdata->frequency, &besterr); + + /* Try all possible PLL dividers */ + for (div = 1; (div <= 63) && besterr; div++) { + fdiv = DIV_ROUND_CLOSEST(s->pdata->frequency, div); + + /* Try multiplier 6 */ + fmul = fdiv * 6; + if ((fdiv >= 500000) && (fdiv <= 800000)) + if (!max310x_update_best_err(fmul, &besterr)) { + pllcfg = (0 << 6) | div; + bestfreq = fmul; + } + /* Try multiplier 48 */ + fmul = fdiv * 48; + if ((fdiv >= 850000) && (fdiv <= 1200000)) + if (!max310x_update_best_err(fmul, &besterr)) { + pllcfg = (1 << 6) | div; + bestfreq = fmul; + } + /* Try multiplier 96 */ + fmul = fdiv * 96; + if ((fdiv >= 425000) && (fdiv <= 1000000)) + if (!max310x_update_best_err(fmul, &besterr)) { + pllcfg = (2 << 6) | div; + bestfreq = fmul; + } + /* Try multiplier 144 */ + fmul = fdiv * 144; + if ((fdiv >= 390000) && (fdiv <= 667000)) + if (!max310x_update_best_err(fmul, &besterr)) { + pllcfg = (3 << 6) | div; + bestfreq = fmul; + } + } + + /* Configure clock source */ + if (s->pdata->driver_flags & MAX310X_EXT_CLK) + clksrc = MAX310X_CLKSRC_EXTCLK_BIT; + else + clksrc = MAX310X_CLKSRC_CRYST_BIT; + + /* Configure PLL */ + if (pllcfg) { + clksrc |= MAX310X_CLKSRC_PLL_BIT; + regmap_write(s->regmap, MAX310X_PLLCFG_REG, pllcfg); + } else + clksrc |= MAX310X_CLKSRC_PLLBYP_BIT; + + regmap_write(s->regmap, MAX310X_CLKSRC_REG, clksrc); + + if (pllcfg) + max310x_wait_pll(s); + + dev_dbg(s->port.dev, "Reference clock set to %lu Hz\n", bestfreq); + + return (int)bestfreq; +} + +static void max310x_handle_rx(struct max310x_port *s, unsigned int rxlen) +{ + unsigned int sts = 0, ch = 0, flag; + struct tty_struct *tty = tty_port_tty_get(&s->port.state->port); + + if (!tty) + return; + + if (unlikely(rxlen >= MAX310X_FIFO_SIZE)) { + dev_warn(s->port.dev, "Possible RX FIFO overrun %d\n", rxlen); + /* Ensure sanity of RX level */ + rxlen = MAX310X_FIFO_SIZE; + } + + dev_dbg(s->port.dev, "RX Len = %u\n", rxlen); + + while (rxlen--) { + regmap_read(s->regmap, MAX310X_RHR_REG, &ch); + regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &sts); + + sts &= MAX310X_LSR_RXPAR_BIT | MAX310X_LSR_FRERR_BIT | + MAX310X_LSR_RXOVR_BIT | MAX310X_LSR_RXBRK_BIT; + + s->port.icount.rx++; + flag = TTY_NORMAL; + + if (unlikely(sts)) { + if (sts & MAX310X_LSR_RXBRK_BIT) { + s->port.icount.brk++; + if (uart_handle_break(&s->port)) + continue; + } else if (sts & MAX310X_LSR_RXPAR_BIT) + s->port.icount.parity++; + else if (sts & MAX310X_LSR_FRERR_BIT) + s->port.icount.frame++; + else if (sts & MAX310X_LSR_RXOVR_BIT) + s->port.icount.overrun++; + + sts &= s->port.read_status_mask; + if (sts & MAX310X_LSR_RXBRK_BIT) + flag = TTY_BREAK; + else if (sts & MAX310X_LSR_RXPAR_BIT) + flag = TTY_PARITY; + else if (sts & MAX310X_LSR_FRERR_BIT) + flag = TTY_FRAME; + else if (sts & MAX310X_LSR_RXOVR_BIT) + flag = TTY_OVERRUN; + } + + if (uart_handle_sysrq_char(s->port, ch)) + continue; + + if (sts & s->port.ignore_status_mask) + continue; + + uart_insert_char(&s->port, sts, MAX310X_LSR_RXOVR_BIT, + ch, flag); + } + + tty_flip_buffer_push(tty); + + tty_kref_put(tty); +} + +static void max310x_handle_tx(struct max310x_port *s) +{ + struct circ_buf *xmit = &s->port.state->xmit; + unsigned int txlen = 0, to_send; + + if (unlikely(s->port.x_char)) { + regmap_write(s->regmap, MAX310X_THR_REG, s->port.x_char); + s->port.icount.tx++; + s->port.x_char = 0; + return; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(&s->port)) + return; + + /* Get length of data pending in circular buffer */ + to_send = uart_circ_chars_pending(xmit); + if (likely(to_send)) { + /* Limit to size of TX FIFO */ + regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &txlen); + txlen = MAX310X_FIFO_SIZE - txlen; + to_send = (to_send > txlen) ? txlen : to_send; + + dev_dbg(s->port.dev, "TX Len = %u\n", to_send); + + /* Add data to send */ + s->port.icount.tx += to_send; + while (to_send--) { + regmap_write(s->regmap, MAX310X_THR_REG, + xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + }; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(&s->port); +} + +static irqreturn_t max310x_ist(int irq, void *dev_id) +{ + struct max310x_port *s = (struct max310x_port *)dev_id; + unsigned int ists = 0, lsr = 0, rxlen = 0; + + mutex_lock(&s->max310x_mutex); + + for (;;) { + /* Read IRQ status & RX FIFO level */ + regmap_read(s->regmap, MAX310X_IRQSTS_REG, &ists); + regmap_read(s->regmap, MAX310X_LSR_IRQSTS_REG, &lsr); + regmap_read(s->regmap, MAX310X_RXFIFOLVL_REG, &rxlen); + if (!ists && !(lsr & MAX310X_LSR_RXTO_BIT) && !rxlen) + break; + + dev_dbg(s->port.dev, "IRQ status: 0x%02x\n", ists); + + if (rxlen) + max310x_handle_rx(s, rxlen); + if (ists & MAX310X_IRQ_TX) + max310x_handle_tx(s); + if (ists & MAX310X_IRQ_CTS_BIT) + uart_handle_cts_change(&s->port, + !!(lsr & MAX310X_LSR_CTS_BIT)); + } + + mutex_unlock(&s->max310x_mutex); + + return IRQ_HANDLED; +} + +static void max310x_wq_proc(struct work_struct *ws) +{ + struct max310x_port *s = container_of(ws, struct max310x_port, tx_work); + + mutex_lock(&s->max310x_mutex); + max310x_handle_tx(s); + mutex_unlock(&s->max310x_mutex); +} + +static void max310x_start_tx(struct uart_port *port) +{ + struct max310x_port *s = container_of(port, struct max310x_port, port); + + queue_work(s->wq, &s->tx_work); +} + +static void max310x_stop_tx(struct uart_port *port) +{ + /* Do nothing */ +} + +static void max310x_stop_rx(struct uart_port *port) +{ + /* Do nothing */ +} + +static unsigned int max310x_tx_empty(struct uart_port *port) +{ + unsigned int val = 0; + struct max310x_port *s = container_of(port, struct max310x_port, port); + + mutex_lock(&s->max310x_mutex); + regmap_read(s->regmap, MAX310X_TXFIFOLVL_REG, &val); + mutex_unlock(&s->max310x_mutex); + + return val ? 0 : TIOCSER_TEMT; +} + +static void max310x_enable_ms(struct uart_port *port) +{ + /* Modem status not supported */ +} + +static unsigned int max310x_get_mctrl(struct uart_port *port) +{ + /* DCD and DSR are not wired and CTS/RTS is handled automatically + * so just indicate DSR and CAR asserted + */ + return TIOCM_DSR | TIOCM_CAR; +} + +static void max310x_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + /* DCD and DSR are not wired and CTS/RTS is hadnled automatically + * so do nothing + */ +} + +static void max310x_break_ctl(struct uart_port *port, int break_state) +{ + struct max310x_port *s = container_of(port, struct max310x_port, port); + + mutex_lock(&s->max310x_mutex); + regmap_update_bits(s->regmap, MAX310X_LCR_REG, + MAX310X_LCR_TXBREAK_BIT, + break_state ? MAX310X_LCR_TXBREAK_BIT : 0); + mutex_unlock(&s->max310x_mutex); +} + +static void max310x_set_termios(struct uart_port *port, + struct ktermios *termios, + struct ktermios *old) +{ + struct max310x_port *s = container_of(port, struct max310x_port, port); + unsigned int lcr, flow = 0; + int baud; + + mutex_lock(&s->max310x_mutex); + + /* Mask termios capabilities we don't support */ + termios->c_cflag &= ~CMSPAR; + termios->c_iflag &= ~IXANY; + + /* Word size */ + switch (termios->c_cflag & CSIZE) { + case CS5: + lcr = MAX310X_LCR_WORD_LEN_5; + break; + case CS6: + lcr = MAX310X_LCR_WORD_LEN_6; + break; + case CS7: + lcr = MAX310X_LCR_WORD_LEN_7; + break; + case CS8: + default: + lcr = MAX310X_LCR_WORD_LEN_8; + break; + } + + /* Parity */ + if (termios->c_cflag & PARENB) { + lcr |= MAX310X_LCR_PARITY_BIT; + if (!(termios->c_cflag & PARODD)) + lcr |= MAX310X_LCR_EVENPARITY_BIT; + } + + /* Stop bits */ + if (termios->c_cflag & CSTOPB) + lcr |= MAX310X_LCR_STOPLEN_BIT; /* 2 stops */ + + /* Update LCR register */ + regmap_write(s->regmap, MAX310X_LCR_REG, lcr); + + /* Set read status mask */ + port->read_status_mask = MAX310X_LSR_RXOVR_BIT; + if (termios->c_iflag & INPCK) + port->read_status_mask |= MAX310X_LSR_RXPAR_BIT | + MAX310X_LSR_FRERR_BIT; + if (termios->c_iflag & (BRKINT | PARMRK)) + port->read_status_mask |= MAX310X_LSR_RXBRK_BIT; + + /* Set status ignore mask */ + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNBRK) + port->ignore_status_mask |= MAX310X_LSR_RXBRK_BIT; + if (!(termios->c_cflag & CREAD)) + port->ignore_status_mask |= MAX310X_LSR_RXPAR_BIT | + MAX310X_LSR_RXOVR_BIT | + MAX310X_LSR_FRERR_BIT | + MAX310X_LSR_RXBRK_BIT; + + /* Configure flow control */ + regmap_write(s->regmap, MAX310X_XON1_REG, termios->c_cc[VSTART]); + regmap_write(s->regmap, MAX310X_XOFF1_REG, termios->c_cc[VSTOP]); + if (termios->c_cflag & CRTSCTS) + flow |= MAX310X_FLOWCTRL_AUTOCTS_BIT | + MAX310X_FLOWCTRL_AUTORTS_BIT; + if (termios->c_iflag & IXON) + flow |= MAX310X_FLOWCTRL_SWFLOW3_BIT | + MAX310X_FLOWCTRL_SWFLOWEN_BIT; + if (termios->c_iflag & IXOFF) + flow |= MAX310X_FLOWCTRL_SWFLOW1_BIT | + MAX310X_FLOWCTRL_SWFLOWEN_BIT; + regmap_write(s->regmap, MAX310X_FLOWCTRL_REG, flow); + + /* Get baud rate generator configuration */ + baud = uart_get_baud_rate(port, termios, old, + port->uartclk / 16 / 0xffff, + port->uartclk / 4); + + /* Setup baudrate generator */ + max310x_set_baud(s, baud); + + /* Update timeout according to new baud rate */ + uart_update_timeout(port, termios->c_cflag, baud); + + mutex_unlock(&s->max310x_mutex); +} + +static int max310x_startup(struct uart_port *port) +{ + unsigned int val, line = port->line; + struct max310x_port *s = container_of(port, struct max310x_port, port); + + if (s->pdata->suspend) + s->pdata->suspend(0); + + mutex_lock(&s->max310x_mutex); + + /* Configure baud rate, 9600 as default */ + max310x_set_baud(s, 9600); + + /* Configure LCR register, 8N1 mode by default */ + val = MAX310X_LCR_WORD_LEN_8; + regmap_write(s->regmap, MAX310X_LCR_REG, val); + + /* Configure MODE1 register */ + regmap_update_bits(s->regmap, MAX310X_MODE1_REG, + MAX310X_MODE1_TRNSCVCTRL_BIT, + (s->pdata->uart_flags[line] & MAX310X_AUTO_DIR_CTRL) + ? MAX310X_MODE1_TRNSCVCTRL_BIT : 0); + + /* Configure MODE2 register */ + val = MAX310X_MODE2_RXEMPTINV_BIT; + if (s->pdata->uart_flags[line] & MAX310X_LOOPBACK) + val |= MAX310X_MODE2_LOOPBACK_BIT; + if (s->pdata->uart_flags[line] & MAX310X_ECHO_SUPRESS) + val |= MAX310X_MODE2_ECHOSUPR_BIT; + + /* Reset FIFOs */ + val |= MAX310X_MODE2_FIFORST_BIT; + regmap_write(s->regmap, MAX310X_MODE2_REG, val); + + /* Configure FIFO trigger level register */ + /* RX FIFO trigger for 16 words, TX FIFO trigger for 64 words */ + val = MAX310X_FIFOTRIGLVL_RX(16) | MAX310X_FIFOTRIGLVL_TX(64); + regmap_write(s->regmap, MAX310X_FIFOTRIGLVL_REG, val); + + /* Configure flow control levels */ + /* Flow control halt level 96, resume level 48 */ + val = MAX310X_FLOWLVL_RES(48) | MAX310X_FLOWLVL_HALT(96); + regmap_write(s->regmap, MAX310X_FLOWLVL_REG, val); + + /* Clear timeout register */ + regmap_write(s->regmap, MAX310X_RXTO_REG, 0); + + /* Configure LSR interrupt enable register */ + /* Enable RX timeout interrupt */ + val = MAX310X_LSR_RXTO_BIT; + regmap_write(s->regmap, MAX310X_LSR_IRQEN_REG, val); + + /* Clear FIFO reset */ + regmap_update_bits(s->regmap, MAX310X_MODE2_REG, + MAX310X_MODE2_FIFORST_BIT, 0); + + /* Clear IRQ status register by reading it */ + regmap_read(s->regmap, MAX310X_IRQSTS_REG, &val); + + /* Configure interrupt enable register */ + /* Enable CTS change interrupt */ + val = MAX310X_IRQ_CTS_BIT; + /* Enable RX, TX interrupts */ + val |= MAX310X_IRQ_RX | MAX310X_IRQ_TX; + regmap_write(s->regmap, MAX310X_IRQEN_REG, val); + + mutex_unlock(&s->max310x_mutex); + + return 0; +} + +static void max310x_shutdown(struct uart_port *port) +{ + struct max310x_port *s = container_of(port, struct max310x_port, port); + + /* Disable all interrupts */ + mutex_lock(&s->max310x_mutex); + regmap_write(s->regmap, MAX310X_IRQEN_REG, 0); + mutex_unlock(&s->max310x_mutex); + + if (s->pdata->suspend) + s->pdata->suspend(1); +} + +static const char *max310x_type(struct uart_port *port) +{ + struct max310x_port *s = container_of(port, struct max310x_port, port); + + return (port->type == PORT_MAX310X) ? s->name : NULL; +} + +static int max310x_request_port(struct uart_port *port) +{ + /* Do nothing */ + return 0; +} + +static void max310x_release_port(struct uart_port *port) +{ + /* Do nothing */ +} + +static void max310x_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE) + port->type = PORT_MAX310X; +} + +static int max310x_verify_port(struct uart_port *port, struct serial_struct *ser) +{ + if ((ser->type == PORT_UNKNOWN) || (ser->type == PORT_MAX310X)) + return 0; + if (ser->irq == port->irq) + return 0; + + return -EINVAL; +} + +static struct uart_ops max310x_ops = { + .tx_empty = max310x_tx_empty, + .set_mctrl = max310x_set_mctrl, + .get_mctrl = max310x_get_mctrl, + .stop_tx = max310x_stop_tx, + .start_tx = max310x_start_tx, + .stop_rx = max310x_stop_rx, + .enable_ms = max310x_enable_ms, + .break_ctl = max310x_break_ctl, + .startup = max310x_startup, + .shutdown = max310x_shutdown, + .set_termios = max310x_set_termios, + .type = max310x_type, + .request_port = max310x_request_port, + .release_port = max310x_release_port, + .config_port = max310x_config_port, + .verify_port = max310x_verify_port, +}; + +static int max310x_suspend(struct spi_device *spi, pm_message_t state) +{ + int ret; + struct max310x_port *s = dev_get_drvdata(&spi->dev); + + dev_dbg(&spi->dev, "Suspend\n"); + + ret = uart_suspend_port(&s->uart, &s->port); + + mutex_lock(&s->max310x_mutex); + + /* Enable sleep mode */ + regmap_update_bits(s->regmap, MAX310X_MODE1_REG, + MAX310X_MODE1_FORCESLEEP_BIT, + MAX310X_MODE1_FORCESLEEP_BIT); + + mutex_unlock(&s->max310x_mutex); + + if (s->pdata->suspend) + s->pdata->suspend(1); + + return ret; +} + +static int max310x_resume(struct spi_device *spi) +{ + struct max310x_port *s = dev_get_drvdata(&spi->dev); + + dev_dbg(&spi->dev, "Resume\n"); + + if (s->pdata->suspend) + s->pdata->suspend(0); + + mutex_lock(&s->max310x_mutex); + + /* Disable sleep mode */ + regmap_update_bits(s->regmap, MAX310X_MODE1_REG, + MAX310X_MODE1_FORCESLEEP_BIT, + 0); + + max310x_wait_pll(s); + + mutex_unlock(&s->max310x_mutex); + + return uart_resume_port(&s->uart, &s->port); +} + +#ifdef CONFIG_GPIOLIB +static int max310x_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + unsigned int val = 0; + struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + + mutex_lock(&s->max310x_mutex); + regmap_read(s->regmap, MAX310X_GPIODATA_REG, &val); + mutex_unlock(&s->max310x_mutex); + + return !!((val >> 4) & (1 << offset)); +} + +static void max310x_gpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + + mutex_lock(&s->max310x_mutex); + regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ? + 1 << offset : 0); + mutex_unlock(&s->max310x_mutex); +} + +static int max310x_gpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + + mutex_lock(&s->max310x_mutex); + + regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset, 0); + + mutex_unlock(&s->max310x_mutex); + + return 0; +} + +static int max310x_gpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct max310x_port *s = container_of(chip, struct max310x_port, gpio); + + mutex_lock(&s->max310x_mutex); + + regmap_update_bits(s->regmap, MAX310X_GPIOCFG_REG, 1 << offset, + 1 << offset); + regmap_update_bits(s->regmap, MAX310X_GPIODATA_REG, 1 << offset, value ? + 1 << offset : 0); + + mutex_unlock(&s->max310x_mutex); + + return 0; +} +#endif + +/* Generic platform data */ +static struct max310x_pdata generic_plat_data = { + .driver_flags = MAX310X_EXT_CLK, + .uart_flags[0] = MAX310X_ECHO_SUPRESS, + .frequency = 26000000, +}; + +static int __devinit max310x_probe(struct spi_device *spi) +{ + struct max310x_port *s; + struct device *dev = &spi->dev; + int chiptype = spi_get_device_id(spi)->driver_data; + struct max310x_pdata *pdata = dev->platform_data; + unsigned int val = 0; + int ret; + + /* Check for IRQ */ + if (spi->irq <= 0) { + dev_err(dev, "No IRQ specified\n"); + return -ENOTSUPP; + } + + /* Alloc port structure */ + s = devm_kzalloc(dev, sizeof(struct max310x_port), GFP_KERNEL); + if (!s) { + dev_err(dev, "Error allocating port structure\n"); + return -ENOMEM; + } + dev_set_drvdata(dev, s); + + if (!pdata) { + dev_warn(dev, "No platform data supplied, using defaults\n"); + pdata = &generic_plat_data; + } + s->pdata = pdata; + + /* Individual chip settings */ + switch (chiptype) { + case MAX310X_TYPE_MAX3107: + s->name = "MAX3107"; + s->nr_gpio = 4; + s->uart.nr = 1; + s->regcfg.max_register = 0x1f; + break; + case MAX310X_TYPE_MAX3108: + s->name = "MAX3108"; + s->nr_gpio = 4; + s->uart.nr = 1; + s->regcfg.max_register = 0x1e; + break; + default: + dev_err(dev, "Unsupported chip type %i\n", chiptype); + return -ENOTSUPP; + } + + /* Check input frequency */ + if ((pdata->driver_flags & MAX310X_EXT_CLK) && + ((pdata->frequency < 500000) || (pdata->frequency > 35000000))) + goto err_freq; + /* Check frequency for quartz */ + if (!(pdata->driver_flags & MAX310X_EXT_CLK) && + ((pdata->frequency < 1000000) || (pdata->frequency > 4000000))) + goto err_freq; + + mutex_init(&s->max310x_mutex); + + /* Setup SPI bus */ + spi->mode = SPI_MODE_0; + spi->bits_per_word = 8; + spi->max_speed_hz = 26000000; + spi_setup(spi); + + /* Setup regmap */ + s->regcfg.reg_bits = 8; + s->regcfg.val_bits = 8; + s->regcfg.read_flag_mask = 0x00; + s->regcfg.write_flag_mask = 0x80; + s->regcfg.cache_type = REGCACHE_RBTREE; + s->regcfg.writeable_reg = max3107_8_reg_writeable; + s->regcfg.volatile_reg = max310x_reg_volatile; + s->regcfg.precious_reg = max310x_reg_precious; + s->regmap = devm_regmap_init_spi(spi, &s->regcfg); + if (IS_ERR(s->regmap)) { + ret = PTR_ERR(s->regmap); + dev_err(dev, "Failed to initialize register map\n"); + goto err_out; + } + + /* Reset chip & check SPI function */ + ret = regmap_write(s->regmap, MAX310X_MODE2_REG, MAX310X_MODE2_RST_BIT); + if (ret) { + dev_err(dev, "SPI transfer failed\n"); + goto err_out; + } + /* Clear chip reset */ + regmap_write(s->regmap, MAX310X_MODE2_REG, 0); + + switch (chiptype) { + case MAX310X_TYPE_MAX3107: + /* Check REV ID to ensure we are talking to what we expect */ + regmap_read(s->regmap, MAX3107_REVID_REG, &val); + if (((val & MAX3107_REV_MASK) != MAX3107_REV_ID)) { + dev_err(dev, "%s ID 0x%02x does not match\n", + s->name, val); + ret = -ENODEV; + goto err_out; + } + break; + case MAX310X_TYPE_MAX3108: + /* MAX3108 have not REV ID register, we just check default value + * from clocksource register to make sure everything works. + */ + regmap_read(s->regmap, MAX310X_CLKSRC_REG, &val); + if (val != (MAX310X_CLKSRC_EXTCLK_BIT | + MAX310X_CLKSRC_PLLBYP_BIT)) { + dev_err(dev, "%s not present\n", s->name); + ret = -ENODEV; + goto err_out; + } + break; + } + + /* Board specific configure */ + if (pdata->init) + pdata->init(); + if (pdata->suspend) + pdata->suspend(0); + + /* Calculate referecne clock */ + s->uartclk = max310x_set_ref_clk(s); + + /* Disable all interrupts */ + regmap_write(s->regmap, MAX310X_IRQEN_REG, 0); + + /* Setup MODE1 register */ + val = MAX310X_MODE1_IRQSEL_BIT; /* Enable IRQ pin */ + if (pdata->driver_flags & MAX310X_AUTOSLEEP) + val = MAX310X_MODE1_AUTOSLEEP_BIT; + regmap_write(s->regmap, MAX310X_MODE1_REG, val); + + /* Setup interrupt */ + ret = devm_request_threaded_irq(dev, spi->irq, NULL, max310x_ist, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(dev), s); + if (ret) { + dev_err(dev, "Unable to reguest IRQ %i\n", spi->irq); + goto err_out; + } + + /* Register UART driver */ + s->uart.owner = THIS_MODULE; + s->uart.driver_name = dev_name(dev); + s->uart.dev_name = "ttyMAX"; + s->uart.major = MAX310X_MAJOR; + s->uart.minor = MAX310X_MINOR; + ret = uart_register_driver(&s->uart); + if (ret) { + dev_err(dev, "Registering UART driver failed\n"); + goto err_out; + } + + /* Initialize workqueue for start TX */ + s->wq = create_freezable_workqueue(dev_name(dev)); + INIT_WORK(&s->tx_work, max310x_wq_proc); + + /* Initialize UART port data */ + s->port.line = 0; + s->port.dev = dev; + s->port.irq = spi->irq; + s->port.type = PORT_MAX310X; + s->port.fifosize = MAX310X_FIFO_SIZE; + s->port.flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; + s->port.iotype = UPIO_PORT; + s->port.membase = (void __iomem *)0xffffffff; /* Bogus value */ + s->port.uartclk = s->uartclk; + s->port.ops = &max310x_ops; + uart_add_one_port(&s->uart, &s->port); + +#ifdef CONFIG_GPIOLIB + /* Setup GPIO cotroller */ + if (pdata->gpio_base) { + s->gpio.owner = THIS_MODULE; + s->gpio.dev = dev; + s->gpio.label = dev_name(dev); + s->gpio.direction_input = max310x_gpio_direction_input; + s->gpio.get = max310x_gpio_get; + s->gpio.direction_output= max310x_gpio_direction_output; + s->gpio.set = max310x_gpio_set; + s->gpio.base = pdata->gpio_base; + s->gpio.ngpio = s->nr_gpio; + if (gpiochip_add(&s->gpio)) { + /* Indicate that we should not call gpiochip_remove */ + s->gpio.base = 0; + } + } else + dev_info(dev, "GPIO support not enabled\n"); +#endif + + /* Go to suspend mode */ + if (pdata->suspend) + pdata->suspend(1); + + return 0; + +err_freq: + dev_err(dev, "Frequency parameter incorrect\n"); + ret = -EINVAL; + +err_out: + dev_set_drvdata(dev, NULL); + devm_kfree(dev, s); + + return ret; +} + +static int __devexit max310x_remove(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct max310x_port *s = dev_get_drvdata(dev); + + dev_dbg(dev, "Removing port\n"); + + devm_free_irq(dev, s->port.irq, s); + + destroy_workqueue(s->wq); + + uart_remove_one_port(&s->uart, &s->port); + + uart_unregister_driver(&s->uart); + +#ifdef CONFIG_GPIOLIB + if (s->pdata->gpio_base) + gpiochip_remove(&s->gpio); +#endif + + dev_set_drvdata(dev, NULL); + + if (s->pdata->suspend) + s->pdata->suspend(1); + if (s->pdata->exit) + s->pdata->exit(); + + devm_kfree(dev, s); + + return 0; +} + +static const struct spi_device_id max310x_id_table[] = { + { "max3107", MAX310X_TYPE_MAX3107 }, + { "max3108", MAX310X_TYPE_MAX3108 }, +}; +MODULE_DEVICE_TABLE(spi, max310x_id_table); + +static struct spi_driver max310x_driver = { + .driver = { + .name = "max310x", + .owner = THIS_MODULE, + }, + .probe = max310x_probe, + .remove = __devexit_p(max310x_remove), + .suspend = max310x_suspend, + .resume = max310x_resume, + .id_table = max310x_id_table, +}; +module_spi_driver(max310x_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Alexander Shiyan "); +MODULE_DESCRIPTION("MAX310X serial driver"); diff --git a/include/linux/platform_data/max310x.h b/include/linux/platform_data/max310x.h new file mode 100644 index 00000000000..91648bf5fc5 --- /dev/null +++ b/include/linux/platform_data/max310x.h @@ -0,0 +1,67 @@ +/* + * Maxim (Dallas) MAX3107/8 serial driver + * + * Copyright (C) 2012 Alexander Shiyan + * + * Based on max3100.c, by Christian Pellegrin + * Based on max3110.c, by Feng Tang + * Based on max3107.c, by Aavamobile + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef _MAX310X_H_ +#define _MAX310X_H_ + +/* + * Example board initialization data: + * + * static struct max310x_pdata max3107_pdata = { + * .driver_flags = MAX310X_EXT_CLK, + * .uart_flags[0] = MAX310X_ECHO_SUPRESS | MAX310X_AUTO_DIR_CTRL, + * .frequency = 3686400, + * .gpio_base = -1, + * }; + * + * static struct spi_board_info spi_device_max3107[] = { + * { + * .modalias = "max3107", + * .irq = IRQ_EINT3, + * .bus_num = 1, + * .chip_select = 1, + * .platform_data = &max3107_pdata, + * }, + * }; + */ + +#define MAX310X_MAX_UARTS 1 + +/* MAX310X platform data structure */ +struct max310x_pdata { + /* Flags global to driver */ + const u8 driver_flags:2; +#define MAX310X_EXT_CLK (0x00000001) /* External clock enable */ +#define MAX310X_AUTOSLEEP (0x00000002) /* Enable AutoSleep mode */ + /* Flags global to UART port */ + const u8 uart_flags[MAX310X_MAX_UARTS]; +#define MAX310X_LOOPBACK (0x00000001) /* Loopback mode enable */ +#define MAX310X_ECHO_SUPRESS (0x00000002) /* Enable echo supress */ +#define MAX310X_AUTO_DIR_CTRL (0x00000004) /* Enable Auto direction + * control (RS-485) + */ + /* Frequency (extrenal clock or crystal) */ + const int frequency; + /* GPIO base number (can be negative) */ + const int gpio_base; + /* Called during startup */ + void (*init)(void); + /* Called before finish */ + void (*exit)(void); + /* Suspend callback */ + void (*suspend)(int do_suspend); +}; + +#endif diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 0253c2022e5..7cf0b68bbe9 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -193,8 +193,8 @@ /* SH-SCI */ #define PORT_SCIFB 93 -/* MAX3107 */ -#define PORT_MAX3107 94 +/* MAX310X */ +#define PORT_MAX310X 94 /* High Speed UART for Medfield */ #define PORT_MFD 95 From 63d486964cbd0d8556f28bf215c37b0d63f6bbba Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Tue, 14 Aug 2012 16:18:32 -0700 Subject: [PATCH 133/235] firmware: remove computone driver firmware and documentation The only Computone support left in the kernel is in drivers/tty/serial/8250/8250_pci.c. CONFIG_COMPUTONE is no longer a valid option. Therefore, remove firmware, documentation, and the last vestiges of this driver. Cc: Rob Landley Cc: Paul Gortmaker Cc: Ben Hutchings Cc: James Bottomley Cc: Dan Williams Signed-off-by: Tim Gardner Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman --- Documentation/serial/00-INDEX | 2 - Documentation/serial/computone.txt | 520 ------- firmware/Makefile | 1 - firmware/intelliport2.bin.ihex | 2147 ---------------------------- 4 files changed, 2670 deletions(-) delete mode 100644 Documentation/serial/computone.txt delete mode 100644 firmware/intelliport2.bin.ihex diff --git a/Documentation/serial/00-INDEX b/Documentation/serial/00-INDEX index e09468ad3cb..f7b0c7dc25e 100644 --- a/Documentation/serial/00-INDEX +++ b/Documentation/serial/00-INDEX @@ -2,8 +2,6 @@ - this file. README.cycladesZ - info on Cyclades-Z firmware loading. -computone.txt - - info on Computone Intelliport II/Plus Multiport Serial Driver. digiepca.txt - info on Digi Intl. {PC,PCI,EISA}Xx and Xem series cards. hayes-esp.txt diff --git a/Documentation/serial/computone.txt b/Documentation/serial/computone.txt deleted file mode 100644 index a6a1158ea2b..00000000000 --- a/Documentation/serial/computone.txt +++ /dev/null @@ -1,520 +0,0 @@ -NOTE: This is an unmaintained driver. It is not guaranteed to work due to -changes made in the tty layer in 2.6. If you wish to take over maintenance of -this driver, contact Michael Warfield . - -Changelog: ----------- -11-01-2001: Original Document - -10-29-2004: Minor misspelling & format fix, update status of driver. - James Nelson - -Computone Intelliport II/Plus Multiport Serial Driver ------------------------------------------------------ - -Release Notes For Linux Kernel 2.2 and higher. -These notes are for the drivers which have already been integrated into the -kernel and have been tested on Linux kernels 2.0, 2.2, 2.3, and 2.4. - -Version: 1.2.14 -Date: 11/01/2001 -Historical Author: Andrew Manison -Primary Author: Doug McNash - -This file assumes that you are using the Computone drivers which are -integrated into the kernel sources. For updating the drivers or installing -drivers into kernels which do not already have Computone drivers, please -refer to the instructions in the README.computone file in the driver patch. - - -1. INTRODUCTION - -This driver supports the entire family of Intelliport II/Plus controllers -with the exception of the MicroChannel controllers. It does not support -products previous to the Intelliport II. - -This driver was developed on the v2.0.x Linux tree and has been tested up -to v2.4.14; it will probably not work with earlier v1.X kernels,. - - -2. QUICK INSTALLATION - -Hardware - If you have an ISA card, find a free interrupt and io port. - List those in use with `cat /proc/interrupts` and - `cat /proc/ioports`. Set the card dip switches to a free - address. You may need to configure your BIOS to reserve an - irq for an ISA card. PCI and EISA parameters are set - automagically. Insert card into computer with the power off - before or after drivers installation. - - Note the hardware address from the Computone ISA cards installed into - the system. These are required for editing ip2.c or editing - /etc/modprobe.d/*.conf, or for specification on the modprobe - command line. - - Note that the /etc/modules.conf should be used for older (pre-2.6) - kernels. - -Software - - -Module installation: - -a) Determine free irq/address to use if any (configure BIOS if need be) -b) Run "make config" or "make menuconfig" or "make xconfig" - Select (m) module for CONFIG_COMPUTONE under character - devices. CONFIG_PCI and CONFIG_MODULES also may need to be set. -c) Set address on ISA cards then: - edit /usr/src/linux/drivers/char/ip2.c if needed - or - edit config file in /etc/modprobe.d/ if needed (module). - or both to match this setting. -d) Run "make modules" -e) Run "make modules_install" -f) Run "/sbin/depmod -a" -g) install driver using `modprobe ip2 ` (options listed below) -h) run ip2mkdev (either the script below or the binary version) - - -Kernel installation: - -a) Determine free irq/address to use if any (configure BIOS if need be) -b) Run "make config" or "make menuconfig" or "make xconfig" - Select (y) kernel for CONFIG_COMPUTONE under character - devices. CONFIG_PCI may need to be set if you have PCI bus. -c) Set address on ISA cards then: - edit /usr/src/linux/drivers/char/ip2.c - (Optional - may be specified on kernel command line now) -d) Run "make zImage" or whatever target you prefer. -e) mv /usr/src/linux/arch/x86/boot/zImage to /boot. -f) Add new config for this kernel into /etc/lilo.conf, run "lilo" - or copy to a floppy disk and boot from that floppy disk. -g) Reboot using this kernel -h) run ip2mkdev (either the script below or the binary version) - -Kernel command line options: - -When compiling the driver into the kernel, io and irq may be -compiled into the driver by editing ip2.c and setting the values for -io and irq in the appropriate array. An alternative is to specify -a command line parameter to the kernel at boot up. - - ip2=io0,irq0,io1,irq1,io2,irq2,io3,irq3 - -Note that this order is very different from the specifications for the -modload parameters which have separate IRQ and IO specifiers. - -The io port also selects PCI (1) and EISA (2) boards. - - io=0 No board - io=1 PCI board - io=2 EISA board - else ISA board io address - -You only need to specify the boards which are present. - - Examples: - - 2 PCI boards: - - ip2=1,0,1,0 - - 1 ISA board at 0x310 irq 5: - - ip2=0x310,5 - -This can be added to and "append" option in lilo.conf similar to this: - - append="ip2=1,0,1,0" - - -3. INSTALLATION - -Previously, the driver sources were packaged with a set of patch files -to update the character drivers' makefile and configuration file, and other -kernel source files. A build script (ip2build) was included which applies -the patches if needed, and build any utilities needed. -What you receive may be a single patch file in conventional kernel -patch format build script. That form can also be applied by -running patch -p1 < ThePatchFile. Otherwise run ip2build. - -The driver can be installed as a module (recommended) or built into the -kernel. This is selected as for other drivers through the `make config` -command from the root of the Linux source tree. If the driver is built -into the kernel you will need to edit the file ip2.c to match the boards -you are installing. See that file for instructions. If the driver is -installed as a module the configuration can also be specified on the -modprobe command line as follows: - - modprobe ip2 irq=irq1,irq2,irq3,irq4 io=addr1,addr2,addr3,addr4 - -where irqnum is one of the valid Intelliport II interrupts (3,4,5,7,10,11, -12,15) and addr1-4 are the base addresses for up to four controllers. If -the irqs are not specified the driver uses the default in ip2.c (which -selects polled mode). If no base addresses are specified the defaults in -ip2.c are used. If you are autoloading the driver module with kerneld or -kmod the base addresses and interrupt number must also be set in ip2.c -and recompile or just insert and options line in /etc/modprobe.d/*.conf or both. -The options line is equivalent to the command line and takes precedence over -what is in ip2.c. - -config sample to put /etc/modprobe.d/*.conf: - options ip2 io=1,0x328 irq=1,10 - alias char-major-71 ip2 - alias char-major-72 ip2 - alias char-major-73 ip2 - -The equivalent in ip2.c: - -static int io[IP2_MAX_BOARDS]= { 1, 0x328, 0, 0 }; -static int irq[IP2_MAX_BOARDS] = { 1, 10, -1, -1 }; - -The equivalent for the kernel command line (in lilo.conf): - - append="ip2=1,1,0x328,10" - - -Note: Both io and irq should be updated to reflect YOUR system. An "io" - address of 1 or 2 indicates a PCI or EISA card in the board table. - The PCI or EISA irq will be assigned automatically. - -Specifying an invalid or in-use irq will default the driver into -running in polled mode for that card. If all irq entries are 0 then -all cards will operate in polled mode. - -If you select the driver as part of the kernel run : - - make zlilo (or whatever you do to create a bootable kernel) - -If you selected a module run : - - make modules && make modules_install - -The utility ip2mkdev (see 5 and 7 below) creates all the device nodes -required by the driver. For a device to be created it must be configured -in the driver and the board must be installed. Only devices corresponding -to real IntelliPort II ports are created. With multiple boards and expansion -boxes this will leave gaps in the sequence of device names. ip2mkdev uses -Linux tty naming conventions: ttyF0 - ttyF255 for normal devices, and -cuf0 - cuf255 for callout devices. - - -4. USING THE DRIVERS - -As noted above, the driver implements the ports in accordance with Linux -conventions, and the devices should be interchangeable with the standard -serial devices. (This is a key point for problem reporting: please make -sure that what you are trying do works on the ttySx/cuax ports first; then -tell us what went wrong with the ip2 ports!) - -Higher speeds can be obtained using the setserial utility which remaps -38,400 bps (extb) to 57,600 bps, 115,200 bps, or a custom speed. -Intelliport II installations using the PowerPort expansion module can -use the custom speed setting to select the highest speeds: 153,600 bps, -230,400 bps, 307,200 bps, 460,800bps and 921,600 bps. The base for -custom baud rate configuration is fixed at 921,600 for cards/expansion -modules with ST654's and 115200 for those with Cirrus CD1400's. This -corresponds to the maximum bit rates those chips are capable. -For example if the baud base is 921600 and the baud divisor is 18 then -the custom rate is 921600/18 = 51200 bps. See the setserial man page for -complete details. Of course if stty accepts the higher rates now you can -use that as well as the standard ioctls(). - - -5. ip2mkdev and assorted utilities... - -Several utilities, including the source for a binary ip2mkdev utility are -available under .../drivers/char/ip2. These can be build by changing to -that directory and typing "make" after the kernel has be built. If you do -not wish to compile the binary utilities, the shell script below can be -cut out and run as "ip2mkdev" to create the necessary device files. To -use the ip2mkdev script, you must have procfs enabled and the proc file -system mounted on /proc. - - -6. NOTES - -This is a release version of the driver, but it is impossible to test it -in all configurations of Linux. If there is any anomalous behaviour that -does not match the standard serial port's behaviour please let us know. - - -7. ip2mkdev shell script - -Previously, this script was simply attached here. It is now attached as a -shar archive to make it easier to extract the script from the documentation. -To create the ip2mkdev shell script change to a convenient directory (/tmp -works just fine) and run the following command: - - unshar Documentation/serial/computone.txt - (This file) - -You should now have a file ip2mkdev in your current working directory with -permissions set to execute. Running that script with then create the -necessary devices for the Computone boards, interfaces, and ports which -are present on you system at the time it is run. - - -#!/bin/sh -# This is a shell archive (produced by GNU sharutils 4.2.1). -# To extract the files from this archive, save it to some FILE, remove -# everything before the `!/bin/sh' line above, then type `sh FILE'. -# -# Made on 2001-10-29 10:32 EST by . -# Source directory was `/home2/src/tmp'. -# -# Existing files will *not* be overwritten unless `-c' is specified. -# -# This shar contains: -# length mode name -# ------ ---------- ------------------------------------------ -# 4251 -rwxr-xr-x ip2mkdev -# -save_IFS="${IFS}" -IFS="${IFS}:" -gettext_dir=FAILED -locale_dir=FAILED -first_param="$1" -for dir in $PATH -do - if test "$gettext_dir" = FAILED && test -f $dir/gettext \ - && ($dir/gettext --version >/dev/null 2>&1) - then - set `$dir/gettext --version 2>&1` - if test "$3" = GNU - then - gettext_dir=$dir - fi - fi - if test "$locale_dir" = FAILED && test -f $dir/shar \ - && ($dir/shar --print-text-domain-dir >/dev/null 2>&1) - then - locale_dir=`$dir/shar --print-text-domain-dir` - fi -done -IFS="$save_IFS" -if test "$locale_dir" = FAILED || test "$gettext_dir" = FAILED -then - echo=echo -else - TEXTDOMAINDIR=$locale_dir - export TEXTDOMAINDIR - TEXTDOMAIN=sharutils - export TEXTDOMAIN - echo="$gettext_dir/gettext -s" -fi -if touch -am -t 200112312359.59 $$.touch >/dev/null 2>&1 && test ! -f 200112312359.59 -a -f $$.touch; then - shar_touch='touch -am -t $1$2$3$4$5$6.$7 "$8"' -elif touch -am 123123592001.59 $$.touch >/dev/null 2>&1 && test ! -f 123123592001.59 -a ! -f 123123592001.5 -a -f $$.touch; then - shar_touch='touch -am $3$4$5$6$1$2.$7 "$8"' -elif touch -am 1231235901 $$.touch >/dev/null 2>&1 && test ! -f 1231235901 -a -f $$.touch; then - shar_touch='touch -am $3$4$5$6$2 "$8"' -else - shar_touch=: - echo - $echo 'WARNING: not restoring timestamps. Consider getting and' - $echo "installing GNU \`touch', distributed in GNU File Utilities..." - echo -fi -rm -f 200112312359.59 123123592001.59 123123592001.5 1231235901 $$.touch -# -if mkdir _sh17581; then - $echo 'x -' 'creating lock directory' -else - $echo 'failed to create lock directory' - exit 1 -fi -# ============= ip2mkdev ============== -if test -f 'ip2mkdev' && test "$first_param" != -c; then - $echo 'x -' SKIPPING 'ip2mkdev' '(file already exists)' -else - $echo 'x -' extracting 'ip2mkdev' '(text)' - sed 's/^X//' << 'SHAR_EOF' > 'ip2mkdev' && -#!/bin/sh - -# -# ip2mkdev -# -# Make or remove devices as needed for Computone Intelliport drivers -# -# First rule! If the dev file exists and you need it, don't mess -# with it. That prevents us from screwing up open ttys, ownership -# and permissions on a running system! -# -# This script will NOT remove devices that no longer exist if their -# board or interface box has been removed. If you want to get rid -# of them, you can manually do an "rm -f /dev/ttyF* /dev/cuaf*" -# before running this script. Running this script will then recreate -# all the valid devices. -# -# Michael H. Warfield -# /\/\|=mhw=|\/\/ -# mhw@wittsend.com -# -# Updated 10/29/2000 for version 1.2.13 naming convention -# under devfs. /\/\|=mhw=|\/\/ -# -# Updated 03/09/2000 for devfs support in ip2 drivers. /\/\|=mhw=|\/\/ -# -X -if test -d /dev/ip2 ; then -# This is devfs mode... We don't do anything except create symlinks -# from the real devices to the old names! -X cd /dev -X echo "Creating symbolic links to devfs devices" -X for i in `ls ip2` ; do -X if test ! -L ip2$i ; then -X # Remove it incase it wasn't a symlink (old device) -X rm -f ip2$i -X ln -s ip2/$i ip2$i -X fi -X done -X for i in `( cd tts ; ls F* )` ; do -X if test ! -L tty$i ; then -X # Remove it incase it wasn't a symlink (old device) -X rm -f tty$i -X ln -s tts/$i tty$i -X fi -X done -X for i in `( cd cua ; ls F* )` ; do -X DEVNUMBER=`expr $i : 'F\(.*\)'` -X if test ! -L cuf$DEVNUMBER ; then -X # Remove it incase it wasn't a symlink (old device) -X rm -f cuf$DEVNUMBER -X ln -s cua/$i cuf$DEVNUMBER -X fi -X done -X exit 0 -fi -X -if test ! -f /proc/tty/drivers -then -X echo "\ -Unable to check driver status. -Make sure proc file system is mounted." -X -X exit 255 -fi -X -if test ! -f /proc/tty/driver/ip2 -then -X echo "\ -Unable to locate ip2 proc file. -Attempting to load driver" -X -X if /sbin/insmod ip2 -X then -X if test ! -f /proc/tty/driver/ip2 -X then -X echo "\ -Unable to locate ip2 proc file after loading driver. -Driver initialization failure or driver version error. -" -X exit 255 -X fi -X else -X echo "Unable to load ip2 driver." -X exit 255 -X fi -fi -X -# Ok... So we got the driver loaded and we can locate the procfs files. -# Next we need our major numbers. -X -TTYMAJOR=`sed -e '/^ip2/!d' -e '/\/dev\/tt/!d' -e 's/.*tt[^ ]*[ ]*\([0-9]*\)[ ]*.*/\1/' < /proc/tty/drivers` -CUAMAJOR=`sed -e '/^ip2/!d' -e '/\/dev\/cu/!d' -e 's/.*cu[^ ]*[ ]*\([0-9]*\)[ ]*.*/\1/' < /proc/tty/drivers` -BRDMAJOR=`sed -e '/^Driver: /!d' -e 's/.*IMajor=\([0-9]*\)[ ]*.*/\1/' < /proc/tty/driver/ip2` -X -echo "\ -TTYMAJOR = $TTYMAJOR -CUAMAJOR = $CUAMAJOR -BRDMAJOR = $BRDMAJOR -" -X -# Ok... Now we should know our major numbers, if appropriate... -# Now we need our boards and start the device loops. -X -grep '^Board [0-9]:' /proc/tty/driver/ip2 | while read token number type alltherest -do -X # The test for blank "type" will catch the stats lead-in lines -X # if they exist in the file -X if test "$type" = "vacant" -o "$type" = "Vacant" -o "$type" = "" -X then -X continue -X fi -X -X BOARDNO=`expr "$number" : '\([0-9]\):'` -X PORTS=`expr "$alltherest" : '.*ports=\([0-9]*\)' | tr ',' ' '` -X MINORS=`expr "$alltherest" : '.*minors=\([0-9,]*\)' | tr ',' ' '` -X -X if test "$BOARDNO" = "" -o "$PORTS" = "" -X then -# This may be a bug. We should at least get this much information -X echo "Unable to process board line" -X continue -X fi -X -X if test "$MINORS" = "" -X then -# Silently skip this one. This board seems to have no boxes -X continue -X fi -X -X echo "board $BOARDNO: $type ports = $PORTS; port numbers = $MINORS" -X -X if test "$BRDMAJOR" != "" -X then -X BRDMINOR=`expr $BOARDNO \* 4` -X STSMINOR=`expr $BRDMINOR + 1` -X if test ! -c /dev/ip2ipl$BOARDNO ; then -X mknod /dev/ip2ipl$BOARDNO c $BRDMAJOR $BRDMINOR -X fi -X if test ! -c /dev/ip2stat$BOARDNO ; then -X mknod /dev/ip2stat$BOARDNO c $BRDMAJOR $STSMINOR -X fi -X fi -X -X if test "$TTYMAJOR" != "" -X then -X PORTNO=$BOARDBASE -X -X for PORTNO in $MINORS -X do -X if test ! -c /dev/ttyF$PORTNO ; then -X # We got the hardware but no device - make it -X mknod /dev/ttyF$PORTNO c $TTYMAJOR $PORTNO -X fi -X done -X fi -X -X if test "$CUAMAJOR" != "" -X then -X PORTNO=$BOARDBASE -X -X for PORTNO in $MINORS -X do -X if test ! -c /dev/cuf$PORTNO ; then -X # We got the hardware but no device - make it -X mknod /dev/cuf$PORTNO c $CUAMAJOR $PORTNO -X fi -X done -X fi -done -X -Xexit 0 -SHAR_EOF - (set 20 01 10 29 10 32 01 'ip2mkdev'; eval "$shar_touch") && - chmod 0755 'ip2mkdev' || - $echo 'restore of' 'ip2mkdev' 'failed' - if ( md5sum --help 2>&1 | grep 'sage: md5sum \[' ) >/dev/null 2>&1 \ - && ( md5sum --version 2>&1 | grep -v 'textutils 1.12' ) >/dev/null; then - md5sum -c << SHAR_EOF >/dev/null 2>&1 \ - || $echo 'ip2mkdev:' 'MD5 check failed' -cb5717134509f38bad9fde6b1f79b4a4 ip2mkdev -SHAR_EOF - else - shar_count="`LC_ALL= LC_CTYPE= LANG= wc -c < 'ip2mkdev'`" - test 4251 -eq "$shar_count" || - $echo 'ip2mkdev:' 'original size' '4251,' 'current size' "$shar_count!" - fi -fi -rm -fr _sh17581 -exit 0 diff --git a/firmware/Makefile b/firmware/Makefile index 344713b1166..fdc9ff045ef 100644 --- a/firmware/Makefile +++ b/firmware/Makefile @@ -40,7 +40,6 @@ fw-shipped-$(CONFIG_BNX2) += bnx2/bnx2-mips-09-6.2.1a.fw \ bnx2/bnx2-mips-06-6.2.1.fw \ bnx2/bnx2-rv2p-06-6.0.15.fw fw-shipped-$(CONFIG_CASSINI) += sun/cassini.bin -fw-shipped-$(CONFIG_COMPUTONE) += intelliport2.bin fw-shipped-$(CONFIG_CHELSIO_T3) += cxgb3/t3b_psram-1.1.0.bin \ cxgb3/t3c_psram-1.1.0.bin \ cxgb3/t3fw-7.10.0.bin \ diff --git a/firmware/intelliport2.bin.ihex b/firmware/intelliport2.bin.ihex deleted file mode 100644 index e9cfe8cb2b2..00000000000 --- a/firmware/intelliport2.bin.ihex +++ /dev/null @@ -1,2147 +0,0 @@ -:100000003C4237180201030000000000000000001D -:10001000576564204465632030312031323A3234F0 -:100020003A33302031393939000000000000000037 -:10003000E96C0F426547694E6E496E47206F462056 -:10004000634F6445CC135A15E8167618041A921BB0 -:10005000201DAE1E3C20CA215823E6247426022807 -:1000600090291E2BAC2C3A2EC82F5631E432723414 -:1000700000368E371C39AA3A383CC63D543FE24020 -:100080007042FE438C451A47A848364AC44B524D2D -:10009000E04E6E50FC518A531855A6563458C2593A -:1000A000505BDE5C6C5EFA5F88611663A464326646 -:1000B000C0674E69DC6A6A6CF86D866F1471A27253 -:1000C0003074BE754C776C778C77AC7733DB8ADC19 -:1000D0005333DB250700750A8A1E080183E30CEB06 -:1000E00020903C01750A8A1E080180E3C0EB129043 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-:1084F00053005072657373208020666F72206D6523 -:108500006E750028636F756E74696E672E2E2E2946 -:108510000000654E64204F6620436F4465000000F4 -:10852000000000000000000000000000000000004B -:10853000000000000000000000000000000000003B -:10854000000000000000000000000000000000002B -:10855000000000000000000000000000000000001B -:10856000000000000000000000000000000000000B -:1085700000000000000000000000000000000000FB -:1085800000000000000000000000000000000000EB -:1085900000000000000000000000000000000000DB -:1085A00000000000000000000000000000000000CB -:1085B00000000000000000000000000000000000BB -:1085C00000000000000000000000000000000000AB -:1085D000000000000000000000000000000000009B -:1085E000000000000000000000000000000000008B -:1085F000000000000000000000000000000000007B -:00000001FF -/* Intelliport II loadware */ -/* -31232 bytes read from ff.lod */ From 5d4121c04b3577e37e389b3553d442f44bb346d7 Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Fri, 17 Aug 2012 14:27:52 +0200 Subject: [PATCH 134/235] TTY: check if tty->port is assigned And if not, complain loudly. None in-kernel module should trigger that, but let us find out for sure. On the other hand, all the out-of-tree modules will hit that. Give them some time (maybe one release) to catch up. Signed-off-by: Jiri Slaby Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 28c3e869ebb..41e42f13a21 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -1415,6 +1415,10 @@ struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx) if (!tty->port) tty->port = driver->ports[idx]; + WARN_RATELIMIT(!tty->port, + "%s: %s driver does not set tty->port. This will crash the kernel later. Fix the driver!\n", + __func__, tty->driver->name); + /* * Structures all installed ... call the ldisc open routines. * If we fail here just call release_tty to clean up. No need From 1c4c4394a6040b7bd2154e848cd9ab536b6ab0dd Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sun, 26 Aug 2012 18:01:01 +0200 Subject: [PATCH 135/235] drivers/tty/serial/amba-pl0{10,11}.c: use clk_prepare_enable and clk_disable_unprepare Clk_prepare_enable and clk_disable_unprepare combine clk_prepare and clk_enable, and clk_disable and clk_unprepare. The9 make the code more concise, and ensure that clk_unprepare is called when clk_enable fails. A simplified version of the semantic patch that introduces calls to these functions is as follows: (http://coccinelle.lip6.fr/) // @@ expression e; @@ - clk_prepare(e); - clk_enable(e); + clk_prepare_enable(e); @@ expression e; @@ - clk_disable(e); - clk_unprepare(e); + clk_disable_unprepare(e); // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl010.c | 15 ++++----------- drivers/tty/serial/amba-pl011.c | 15 ++++----------- 2 files changed, 8 insertions(+), 22 deletions(-) diff --git a/drivers/tty/serial/amba-pl010.c b/drivers/tty/serial/amba-pl010.c index 0d91a540bf1..22317dd1647 100644 --- a/drivers/tty/serial/amba-pl010.c +++ b/drivers/tty/serial/amba-pl010.c @@ -312,16 +312,12 @@ static int pl010_startup(struct uart_port *port) struct uart_amba_port *uap = (struct uart_amba_port *)port; int retval; - retval = clk_prepare(uap->clk); - if (retval) - goto out; - /* * Try to enable the clock producer. */ - retval = clk_enable(uap->clk); + retval = clk_prepare_enable(uap->clk); if (retval) - goto clk_unprep; + goto out; uap->port.uartclk = clk_get_rate(uap->clk); @@ -346,9 +342,7 @@ static int pl010_startup(struct uart_port *port) return 0; clk_dis: - clk_disable(uap->clk); - clk_unprep: - clk_unprepare(uap->clk); + clk_disable_unprepare(uap->clk); out: return retval; } @@ -375,8 +369,7 @@ static void pl010_shutdown(struct uart_port *port) /* * Shut down the clock producer */ - clk_disable(uap->clk); - clk_unprepare(uap->clk); + clk_disable_unprepare(uap->clk); } static void diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 92b1ac8db63..3322023e38a 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1324,16 +1324,12 @@ static int pl011_startup(struct uart_port *port) "could not set default pins\n"); } - retval = clk_prepare(uap->clk); - if (retval) - goto out; - /* * Try to enable the clock producer. */ - retval = clk_enable(uap->clk); + retval = clk_prepare_enable(uap->clk); if (retval) - goto clk_unprep; + goto out; uap->port.uartclk = clk_get_rate(uap->clk); @@ -1411,9 +1407,7 @@ static int pl011_startup(struct uart_port *port) return 0; clk_dis: - clk_disable(uap->clk); - clk_unprep: - clk_unprepare(uap->clk); + clk_disable_unprepare(uap->clk); out: return retval; } @@ -1473,8 +1467,7 @@ static void pl011_shutdown(struct uart_port *port) /* * Shut down the clock producer */ - clk_disable(uap->clk); - clk_unprepare(uap->clk); + clk_disable_unprepare(uap->clk); /* Optionally let pins go into sleep states */ if (!IS_ERR(uap->pins_sleep)) { retval = pinctrl_select_state(uap->pinctrl, uap->pins_sleep); From c0fc208e487a985c4d083c498fecf791e6e965b7 Mon Sep 17 00:00:00 2001 From: Devendra Naga Date: Fri, 24 Aug 2012 03:34:42 +0530 Subject: [PATCH 136/235] tty: max3100: use module_spi_driver the driver's module init and exit functions can be replaced with module_spi_driver as they do only spi_register_driver and spi_unregister_driver in module's init and exit paths. Signed-off-by: Devendra Naga Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/max3100.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c index b4902b99cfd..46043c2521c 100644 --- a/drivers/tty/serial/max3100.c +++ b/drivers/tty/serial/max3100.c @@ -910,17 +910,7 @@ static struct spi_driver max3100_driver = { .resume = max3100_resume, }; -static int __init max3100_init(void) -{ - return spi_register_driver(&max3100_driver); -} -module_init(max3100_init); - -static void __exit max3100_exit(void) -{ - spi_unregister_driver(&max3100_driver); -} -module_exit(max3100_exit); +module_spi_driver(max3100_driver); MODULE_DESCRIPTION("MAX3100 driver"); MODULE_AUTHOR("Christian Pellegrin "); From 1a16afa2cecd36bc4b6ba00fe4c83fcf5ca6e710 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Mon, 20 Aug 2012 15:56:34 +0200 Subject: [PATCH 137/235] tty: serial: altera_uart: Use platform_{get,set}_drvdata Use the wrapper functions, so we can directly pass a struct platfrom_device. Signed-off-by: Tobias Klauser Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/altera_uart.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/altera_uart.c b/drivers/tty/serial/altera_uart.c index 1f0330915d5..15d80b9fb30 100644 --- a/drivers/tty/serial/altera_uart.c +++ b/drivers/tty/serial/altera_uart.c @@ -591,7 +591,7 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) port->ops = &altera_uart_ops; port->flags = UPF_BOOT_AUTOCONF; - dev_set_drvdata(&pdev->dev, port); + platform_set_drvdata(pdev, port); uart_add_one_port(&altera_uart_driver, port); @@ -600,11 +600,11 @@ static int __devinit altera_uart_probe(struct platform_device *pdev) static int __devexit altera_uart_remove(struct platform_device *pdev) { - struct uart_port *port = dev_get_drvdata(&pdev->dev); + struct uart_port *port = platform_get_drvdata(pdev); if (port) { uart_remove_one_port(&altera_uart_driver, port); - dev_set_drvdata(&pdev->dev, NULL); + platform_set_drvdata(pdev, NULL); port->mapbase = 0; } From 23e7c6a765df64cafebff2d50fc51345797ca99a Mon Sep 17 00:00:00 2001 From: Emil Goode Date: Sat, 18 Aug 2012 18:12:48 +0200 Subject: [PATCH 138/235] tty: serial: max310x: Check return code of gpiochip_remove MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The gpiochip_remove function may fail to remove a gpio_chip if any GPIOs are still requested. This patch informs the caller of such a senario. Sparse is warning because the function prototype has a __must_check annotation. Sparse warning: drivers/tty/serial/max310x.c:1223:18: warning: ignoring return value of ‘gpiochip_remove’, declared with attribute warn_unused_result [-Wunused-result] Signed-off-by: Emil Goode Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/max310x.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 534e44851b7..06ff5ad7563 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1207,6 +1207,7 @@ static int __devexit max310x_remove(struct spi_device *spi) { struct device *dev = &spi->dev; struct max310x_port *s = dev_get_drvdata(dev); + int ret = 0; dev_dbg(dev, "Removing port\n"); @@ -1219,8 +1220,11 @@ static int __devexit max310x_remove(struct spi_device *spi) uart_unregister_driver(&s->uart); #ifdef CONFIG_GPIOLIB - if (s->pdata->gpio_base) - gpiochip_remove(&s->gpio); + if (s->pdata->gpio_base) { + ret = gpiochip_remove(&s->gpio); + if (ret) + dev_err(dev, "Failed to remove gpio chip: %d\n", ret); + } #endif dev_set_drvdata(dev, NULL); @@ -1232,7 +1236,7 @@ static int __devexit max310x_remove(struct spi_device *spi) devm_kfree(dev, s); - return 0; + return ret; } static const struct spi_device_id max310x_id_table[] = { From fd7c81f864e3d8a2847fc0e36fde78b0da2fdf2c Mon Sep 17 00:00:00 2001 From: Emil Goode Date: Sat, 18 Aug 2012 18:12:49 +0200 Subject: [PATCH 139/235] tty: serial: max310x: Remove explicit use of devm_kfree There is no reason to explicitly call devm_kfree in probe or remove functions. Signed-off-by: Emil Goode Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/max310x.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/tty/serial/max310x.c b/drivers/tty/serial/max310x.c index 06ff5ad7563..2bc28a59d38 100644 --- a/drivers/tty/serial/max310x.c +++ b/drivers/tty/serial/max310x.c @@ -1198,7 +1198,6 @@ err_freq: err_out: dev_set_drvdata(dev, NULL); - devm_kfree(dev, s); return ret; } @@ -1234,8 +1233,6 @@ static int __devexit max310x_remove(struct spi_device *spi) if (s->pdata->exit) s->pdata->exit(); - devm_kfree(dev, s); - return ret; } From bbb63c514a3464342967237a51a21ea8f61ab951 Mon Sep 17 00:00:00 2001 From: Wanlong Gao Date: Mon, 27 Aug 2012 15:23:12 +0800 Subject: [PATCH 140/235] drivers:tty:fix up ENOIOCTLCMD error handling At commit 07d106d0, Linus pointed out that ENOIOCTLCMD should be translated as ENOTTY to user mode. For example: fd = open("/dev/tty", O_RDWR); ioctl(fd, -1, &argp); then the errno should be ENOTTY but not EINVAL. Signed-off-by: Wanlong Gao Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/tty_io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 41e42f13a21..d3bf91a2930 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2774,7 +2774,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg) if (ld->ops->ioctl) { retval = ld->ops->ioctl(tty, file, cmd, arg); if (retval == -ENOIOCTLCMD) - retval = -EINVAL; + retval = -ENOTTY; } tty_ldisc_deref(ld); return retval; From d3dec96e401cc66d7280732558d711ac2ee7a531 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Mon, 27 Aug 2012 16:03:14 +0200 Subject: [PATCH 141/235] tty: serial: mpc5xxx: add support for mark/space parity Tested on a custom MPC5200B-board using some fancy industrial protocol. Verified that MPC512x has identical bits, so should work there as well. Signed-off-by: Wolfram Sang Acked-by: Anatolij Gustschin Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mpc52xx_uart.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/mpc52xx_uart.c b/drivers/tty/serial/mpc52xx_uart.c index bedac0d4c9c..f19d04ed858 100644 --- a/drivers/tty/serial/mpc52xx_uart.c +++ b/drivers/tty/serial/mpc52xx_uart.c @@ -775,11 +775,15 @@ mpc52xx_uart_set_termios(struct uart_port *port, struct ktermios *new, } if (new->c_cflag & PARENB) { + if (new->c_cflag & CMSPAR) + mr1 |= MPC52xx_PSC_MODE_PARFORCE; + + /* With CMSPAR, PARODD also means high parity (same as termios) */ mr1 |= (new->c_cflag & PARODD) ? MPC52xx_PSC_MODE_PARODD : MPC52xx_PSC_MODE_PAREVEN; - } else + } else { mr1 |= MPC52xx_PSC_MODE_PARNONE; - + } mr2 = 0; From 9250dd5738ca2f2728913fefc6573daf5b95efa4 Mon Sep 17 00:00:00 2001 From: Julia Lawall Date: Sat, 1 Sep 2012 18:33:09 +0200 Subject: [PATCH 142/235] drivers/tty/serial/sirfsoc_uart.c: drop frees of devm_ alloc'd data devm free functions should not have to be explicitly used. A semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // @@ @@ ( * devm_kfree(...); | * devm_free_irq(...); | * devm_iounmap(...); | * devm_release_region(...); | * devm_release_mem_region(...); ) // Signed-off-by: Julia Lawall Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sirfsoc_uart.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 5b3eda2024f..a9e2bd1ab53 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -668,7 +668,7 @@ int sirfsoc_uart_probe(struct platform_device *pdev) if (res == NULL) { dev_err(&pdev->dev, "Insufficient resources.\n"); ret = -EFAULT; - goto irq_err; + goto err; } port->irq = res->start; @@ -676,7 +676,7 @@ int sirfsoc_uart_probe(struct platform_device *pdev) sirfport->p = pinctrl_get_select_default(&pdev->dev); ret = IS_ERR(sirfport->p); if (ret) - goto pin_err; + goto err; } port->ops = &sirfsoc_uart_ops; @@ -695,9 +695,6 @@ port_err: platform_set_drvdata(pdev, NULL); if (sirfport->hw_flow_ctrl) pinctrl_put(sirfport->p); -pin_err: -irq_err: - devm_iounmap(&pdev->dev, port->membase); err: return ret; } @@ -709,7 +706,6 @@ static int sirfsoc_uart_remove(struct platform_device *pdev) platform_set_drvdata(pdev, NULL); if (sirfport->hw_flow_ctrl) pinctrl_put(sirfport->p); - devm_iounmap(&pdev->dev, port->membase); uart_remove_one_port(&sirfsoc_uart_drv, port); return 0; } From 7ba2e769825fef035a943ed74d90379245508764 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 4 Sep 2012 16:34:45 +0100 Subject: [PATCH 143/235] tty: Split the serial_core helpers for setserial into two We want them split so that we can call them from setserial functionality where we copy to/from user space and do the locking, but also from sysfs where in future we'll want to came them within a sysfs context. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 158 +++++++++++++++++-------------- 1 file changed, 87 insertions(+), 71 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 5b308c87b68..bb5f2360383 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -634,38 +634,44 @@ static void uart_unthrottle(struct tty_struct *tty) uart_set_mctrl(port, TIOCM_RTS); } -static int uart_get_info(struct uart_state *state, - struct serial_struct __user *retinfo) +static void uart_get_info(struct tty_port *port, + struct uart_state *state, + struct serial_struct *retinfo) { struct uart_port *uport = state->uart_port; + + memset(retinfo, 0, sizeof(retinfo)); + + retinfo->type = uport->type; + retinfo->line = uport->line; + retinfo->port = uport->iobase; + if (HIGH_BITS_OFFSET) + retinfo->port_high = (long) uport->iobase >> HIGH_BITS_OFFSET; + retinfo->irq = uport->irq; + retinfo->flags = uport->flags; + retinfo->xmit_fifo_size = uport->fifosize; + retinfo->baud_base = uport->uartclk / 16; + retinfo->close_delay = jiffies_to_msecs(port->close_delay) / 10; + retinfo->closing_wait = port->closing_wait == ASYNC_CLOSING_WAIT_NONE ? + ASYNC_CLOSING_WAIT_NONE : + jiffies_to_msecs(port->closing_wait) / 10; + retinfo->custom_divisor = uport->custom_divisor; + retinfo->hub6 = uport->hub6; + retinfo->io_type = uport->iotype; + retinfo->iomem_reg_shift = uport->regshift; + retinfo->iomem_base = (void *)(unsigned long)uport->mapbase; +} + +static int uart_get_info_user(struct uart_state *state, + struct serial_struct __user *retinfo) +{ struct tty_port *port = &state->port; struct serial_struct tmp; - memset(&tmp, 0, sizeof(tmp)); - /* Ensure the state we copy is consistent and no hardware changes occur as we go */ mutex_lock(&port->mutex); - - tmp.type = uport->type; - tmp.line = uport->line; - tmp.port = uport->iobase; - if (HIGH_BITS_OFFSET) - tmp.port_high = (long) uport->iobase >> HIGH_BITS_OFFSET; - tmp.irq = uport->irq; - tmp.flags = uport->flags; - tmp.xmit_fifo_size = uport->fifosize; - tmp.baud_base = uport->uartclk / 16; - tmp.close_delay = jiffies_to_msecs(port->close_delay) / 10; - tmp.closing_wait = port->closing_wait == ASYNC_CLOSING_WAIT_NONE ? - ASYNC_CLOSING_WAIT_NONE : - jiffies_to_msecs(port->closing_wait) / 10; - tmp.custom_divisor = uport->custom_divisor; - tmp.hub6 = uport->hub6; - tmp.io_type = uport->iotype; - tmp.iomem_reg_shift = uport->regshift; - tmp.iomem_base = (void *)(unsigned long)uport->mapbase; - + uart_get_info(port, state, &tmp); mutex_unlock(&port->mutex); if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) @@ -673,42 +679,30 @@ static int uart_get_info(struct uart_state *state, return 0; } -static int uart_set_info(struct tty_struct *tty, struct uart_state *state, - struct serial_struct __user *newinfo) +static int uart_set_info(struct tty_struct *tty, struct tty_port *port, + struct uart_state *state, + struct serial_struct *new_info) { - struct serial_struct new_serial; struct uart_port *uport = state->uart_port; - struct tty_port *port = &state->port; unsigned long new_port; unsigned int change_irq, change_port, closing_wait; unsigned int old_custom_divisor, close_delay; upf_t old_flags, new_flags; int retval = 0; - if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) - return -EFAULT; - - new_port = new_serial.port; + new_port = new_info->port; if (HIGH_BITS_OFFSET) - new_port += (unsigned long) new_serial.port_high << HIGH_BITS_OFFSET; + new_port += (unsigned long) new_info->port_high << HIGH_BITS_OFFSET; - new_serial.irq = irq_canonicalize(new_serial.irq); - close_delay = msecs_to_jiffies(new_serial.close_delay * 10); - closing_wait = new_serial.closing_wait == ASYNC_CLOSING_WAIT_NONE ? + new_info->irq = irq_canonicalize(new_info->irq); + close_delay = msecs_to_jiffies(new_info->close_delay * 10); + closing_wait = new_info->closing_wait == ASYNC_CLOSING_WAIT_NONE ? ASYNC_CLOSING_WAIT_NONE : - msecs_to_jiffies(new_serial.closing_wait * 10); + msecs_to_jiffies(new_info->closing_wait * 10); - /* - * This semaphore protects port->count. It is also - * very useful to prevent opens. Also, take the - * port configuration semaphore to make sure that a - * module insertion/removal doesn't change anything - * under us. - */ - mutex_lock(&port->mutex); change_irq = !(uport->flags & UPF_FIXED_PORT) - && new_serial.irq != uport->irq; + && new_info->irq != uport->irq; /* * Since changing the 'type' of the port changes its resource @@ -717,29 +711,29 @@ static int uart_set_info(struct tty_struct *tty, struct uart_state *state, */ change_port = !(uport->flags & UPF_FIXED_PORT) && (new_port != uport->iobase || - (unsigned long)new_serial.iomem_base != uport->mapbase || - new_serial.hub6 != uport->hub6 || - new_serial.io_type != uport->iotype || - new_serial.iomem_reg_shift != uport->regshift || - new_serial.type != uport->type); + (unsigned long)new_info->iomem_base != uport->mapbase || + new_info->hub6 != uport->hub6 || + new_info->io_type != uport->iotype || + new_info->iomem_reg_shift != uport->regshift || + new_info->type != uport->type); old_flags = uport->flags; - new_flags = new_serial.flags; + new_flags = new_info->flags; old_custom_divisor = uport->custom_divisor; if (!capable(CAP_SYS_ADMIN)) { retval = -EPERM; if (change_irq || change_port || - (new_serial.baud_base != uport->uartclk / 16) || + (new_info->baud_base != uport->uartclk / 16) || (close_delay != port->close_delay) || (closing_wait != port->closing_wait) || - (new_serial.xmit_fifo_size && - new_serial.xmit_fifo_size != uport->fifosize) || + (new_info->xmit_fifo_size && + new_info->xmit_fifo_size != uport->fifosize) || (((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0)) goto exit; uport->flags = ((uport->flags & ~UPF_USR_MASK) | (new_flags & UPF_USR_MASK)); - uport->custom_divisor = new_serial.custom_divisor; + uport->custom_divisor = new_info->custom_divisor; goto check_and_exit; } @@ -747,10 +741,10 @@ static int uart_set_info(struct tty_struct *tty, struct uart_state *state, * Ask the low level driver to verify the settings. */ if (uport->ops->verify_port) - retval = uport->ops->verify_port(uport, &new_serial); + retval = uport->ops->verify_port(uport, new_info); - if ((new_serial.irq >= nr_irqs) || (new_serial.irq < 0) || - (new_serial.baud_base < 9600)) + if ((new_info->irq >= nr_irqs) || (new_info->irq < 0) || + (new_info->baud_base < 9600)) retval = -EINVAL; if (retval) @@ -790,11 +784,11 @@ static int uart_set_info(struct tty_struct *tty, struct uart_state *state, uport->ops->release_port(uport); uport->iobase = new_port; - uport->type = new_serial.type; - uport->hub6 = new_serial.hub6; - uport->iotype = new_serial.io_type; - uport->regshift = new_serial.iomem_reg_shift; - uport->mapbase = (unsigned long)new_serial.iomem_base; + uport->type = new_info->type; + uport->hub6 = new_info->hub6; + uport->iotype = new_info->io_type; + uport->regshift = new_info->iomem_reg_shift; + uport->mapbase = (unsigned long)new_info->iomem_base; /* * Claim and map the new regions @@ -835,16 +829,16 @@ static int uart_set_info(struct tty_struct *tty, struct uart_state *state, } if (change_irq) - uport->irq = new_serial.irq; + uport->irq = new_info->irq; if (!(uport->flags & UPF_FIXED_PORT)) - uport->uartclk = new_serial.baud_base * 16; + uport->uartclk = new_info->baud_base * 16; uport->flags = (uport->flags & ~UPF_CHANGE_MASK) | (new_flags & UPF_CHANGE_MASK); - uport->custom_divisor = new_serial.custom_divisor; + uport->custom_divisor = new_info->custom_divisor; port->close_delay = close_delay; port->closing_wait = closing_wait; - if (new_serial.xmit_fifo_size) - uport->fifosize = new_serial.xmit_fifo_size; + if (new_info->xmit_fifo_size) + uport->fifosize = new_info->xmit_fifo_size; if (port->tty) port->tty->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0; @@ -873,6 +867,28 @@ static int uart_set_info(struct tty_struct *tty, struct uart_state *state, } else retval = uart_startup(tty, state, 1); exit: + return retval; +} + +static int uart_set_info_user(struct tty_struct *tty, struct uart_state *state, + struct serial_struct __user *newinfo) +{ + struct serial_struct new_serial; + struct tty_port *port = &state->port; + int retval; + + if (copy_from_user(&new_serial, newinfo, sizeof(new_serial))) + return -EFAULT; + + /* + * This semaphore protects port->count. It is also + * very useful to prevent opens. Also, take the + * port configuration semaphore to make sure that a + * module insertion/removal doesn't change anything + * under us. + */ + mutex_lock(&port->mutex); + retval = uart_set_info(tty, port, state, &new_serial); mutex_unlock(&port->mutex); return retval; } @@ -1115,11 +1131,11 @@ uart_ioctl(struct tty_struct *tty, unsigned int cmd, */ switch (cmd) { case TIOCGSERIAL: - ret = uart_get_info(state, uarg); + ret = uart_get_info_user(state, uarg); break; case TIOCSSERIAL: - ret = uart_set_info(tty, state, uarg); + ret = uart_set_info_user(tty, state, uarg); break; case TIOCSERCONFIG: From ba3fe7aba2067212a8c3baffc18f9209fcbe9d34 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 4 Sep 2012 16:35:08 +0100 Subject: [PATCH 144/235] tty: move the async flags from the serial code into the tty includes These are used with the tty_port flags which are tty generic so move the flags into a more sensible place. This then makes it possible to add helpers such as those suggested by Huang Shijie. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- include/linux/Kbuild | 1 + include/linux/serial.h | 75 ++----------------------------------- include/linux/tty.h | 1 + include/linux/tty_flags.h | 78 +++++++++++++++++++++++++++++++++++++++ 4 files changed, 83 insertions(+), 72 deletions(-) create mode 100644 include/linux/tty_flags.h diff --git a/include/linux/Kbuild b/include/linux/Kbuild index e9f560a40b8..c57e064666e 100644 --- a/include/linux/Kbuild +++ b/include/linux/Kbuild @@ -369,6 +369,7 @@ header-y += tipc.h header-y += tipc_config.h header-y += toshiba.h header-y += tty.h +header-y += tty_flags.h header-y += types.h header-y += udf_fs_i.h header-y += udp.h diff --git a/include/linux/serial.h b/include/linux/serial.h index 90e9f981358..3504f428ce6 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -12,9 +12,12 @@ #include +#include + #ifdef __KERNEL__ #include + /* * Counters of the input lines (CTS, DSR, RI, CD) interrupts */ @@ -94,78 +97,6 @@ struct serial_uart_config { #define UART_STARTECH 0x04 #define UART_NATSEMI 0x08 -/* - * Definitions for async_struct (and serial_struct) flags field - * - * Define ASYNCB_* for convenient use with {test,set,clear}_bit. - */ -#define ASYNCB_HUP_NOTIFY 0 /* Notify getty on hangups and closes - * on the callout port */ -#define ASYNCB_FOURPORT 1 /* Set OU1, OUT2 per AST Fourport settings */ -#define ASYNCB_SAK 2 /* Secure Attention Key (Orange book) */ -#define ASYNCB_SPLIT_TERMIOS 3 /* Separate termios for dialin/callout */ -#define ASYNCB_SPD_HI 4 /* Use 56000 instead of 38400 bps */ -#define ASYNCB_SPD_VHI 5 /* Use 115200 instead of 38400 bps */ -#define ASYNCB_SKIP_TEST 6 /* Skip UART test during autoconfiguration */ -#define ASYNCB_AUTO_IRQ 7 /* Do automatic IRQ during - * autoconfiguration */ -#define ASYNCB_SESSION_LOCKOUT 8 /* Lock out cua opens based on session */ -#define ASYNCB_PGRP_LOCKOUT 9 /* Lock out cua opens based on pgrp */ -#define ASYNCB_CALLOUT_NOHUP 10 /* Don't do hangups for cua device */ -#define ASYNCB_HARDPPS_CD 11 /* Call hardpps when CD goes high */ -#define ASYNCB_SPD_SHI 12 /* Use 230400 instead of 38400 bps */ -#define ASYNCB_LOW_LATENCY 13 /* Request low latency behaviour */ -#define ASYNCB_BUGGY_UART 14 /* This is a buggy UART, skip some safety - * checks. Note: can be dangerous! */ -#define ASYNCB_AUTOPROBE 15 /* Port was autoprobed by PCI or PNP code */ -#define ASYNCB_LAST_USER 15 - -/* Internal flags used only by kernel */ -#define ASYNCB_INITIALIZED 31 /* Serial port was initialized */ -#define ASYNCB_SUSPENDED 30 /* Serial port is suspended */ -#define ASYNCB_NORMAL_ACTIVE 29 /* Normal device is active */ -#define ASYNCB_BOOT_AUTOCONF 28 /* Autoconfigure port on bootup */ -#define ASYNCB_CLOSING 27 /* Serial port is closing */ -#define ASYNCB_CTS_FLOW 26 /* Do CTS flow control */ -#define ASYNCB_CHECK_CD 25 /* i.e., CLOCAL */ -#define ASYNCB_SHARE_IRQ 24 /* for multifunction cards, no longer used */ -#define ASYNCB_CONS_FLOW 23 /* flow control for console */ -#define ASYNCB_FIRST_KERNEL 22 - -#define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY) -#define ASYNC_SUSPENDED (1U << ASYNCB_SUSPENDED) -#define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT) -#define ASYNC_SAK (1U << ASYNCB_SAK) -#define ASYNC_SPLIT_TERMIOS (1U << ASYNCB_SPLIT_TERMIOS) -#define ASYNC_SPD_HI (1U << ASYNCB_SPD_HI) -#define ASYNC_SPD_VHI (1U << ASYNCB_SPD_VHI) -#define ASYNC_SKIP_TEST (1U << ASYNCB_SKIP_TEST) -#define ASYNC_AUTO_IRQ (1U << ASYNCB_AUTO_IRQ) -#define ASYNC_SESSION_LOCKOUT (1U << ASYNCB_SESSION_LOCKOUT) -#define ASYNC_PGRP_LOCKOUT (1U << ASYNCB_PGRP_LOCKOUT) -#define ASYNC_CALLOUT_NOHUP (1U << ASYNCB_CALLOUT_NOHUP) -#define ASYNC_HARDPPS_CD (1U << ASYNCB_HARDPPS_CD) -#define ASYNC_SPD_SHI (1U << ASYNCB_SPD_SHI) -#define ASYNC_LOW_LATENCY (1U << ASYNCB_LOW_LATENCY) -#define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART) -#define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE) - -#define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1) -#define ASYNC_USR_MASK (ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \ - ASYNC_LOW_LATENCY) -#define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI) -#define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI) -#define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI) - -#define ASYNC_INITIALIZED (1U << ASYNCB_INITIALIZED) -#define ASYNC_NORMAL_ACTIVE (1U << ASYNCB_NORMAL_ACTIVE) -#define ASYNC_BOOT_AUTOCONF (1U << ASYNCB_BOOT_AUTOCONF) -#define ASYNC_CLOSING (1U << ASYNCB_CLOSING) -#define ASYNC_CTS_FLOW (1U << ASYNCB_CTS_FLOW) -#define ASYNC_CHECK_CD (1U << ASYNCB_CHECK_CD) -#define ASYNC_SHARE_IRQ (1U << ASYNCB_SHARE_IRQ) -#define ASYNC_CONS_FLOW (1U << ASYNCB_CONS_FLOW) -#define ASYNC_INTERNAL_FLAGS (~((1U << ASYNCB_FIRST_KERNEL) - 1)) /* * Multiport serial configuration structure --- external structure diff --git a/include/linux/tty.h b/include/linux/tty.h index 69a787fdfa9..dbebd1e56bc 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -43,6 +43,7 @@ #include #include #include +#include diff --git a/include/linux/tty_flags.h b/include/linux/tty_flags.h new file mode 100644 index 00000000000..eefcb483a2c --- /dev/null +++ b/include/linux/tty_flags.h @@ -0,0 +1,78 @@ +#ifndef _LINUX_TTY_FLAGS_H +#define _LINUX_TTY_FLAGS_H + +/* + * Definitions for async_struct (and serial_struct) flags field also + * shared by the tty_port flags structures. + * + * Define ASYNCB_* for convenient use with {test,set,clear}_bit. + */ +#define ASYNCB_HUP_NOTIFY 0 /* Notify getty on hangups and closes + * on the callout port */ +#define ASYNCB_FOURPORT 1 /* Set OU1, OUT2 per AST Fourport settings */ +#define ASYNCB_SAK 2 /* Secure Attention Key (Orange book) */ +#define ASYNCB_SPLIT_TERMIOS 3 /* Separate termios for dialin/callout */ +#define ASYNCB_SPD_HI 4 /* Use 56000 instead of 38400 bps */ +#define ASYNCB_SPD_VHI 5 /* Use 115200 instead of 38400 bps */ +#define ASYNCB_SKIP_TEST 6 /* Skip UART test during autoconfiguration */ +#define ASYNCB_AUTO_IRQ 7 /* Do automatic IRQ during + * autoconfiguration */ +#define ASYNCB_SESSION_LOCKOUT 8 /* Lock out cua opens based on session */ +#define ASYNCB_PGRP_LOCKOUT 9 /* Lock out cua opens based on pgrp */ +#define ASYNCB_CALLOUT_NOHUP 10 /* Don't do hangups for cua device */ +#define ASYNCB_HARDPPS_CD 11 /* Call hardpps when CD goes high */ +#define ASYNCB_SPD_SHI 12 /* Use 230400 instead of 38400 bps */ +#define ASYNCB_LOW_LATENCY 13 /* Request low latency behaviour */ +#define ASYNCB_BUGGY_UART 14 /* This is a buggy UART, skip some safety + * checks. Note: can be dangerous! */ +#define ASYNCB_AUTOPROBE 15 /* Port was autoprobed by PCI or PNP code */ +#define ASYNCB_LAST_USER 15 + +/* Internal flags used only by kernel */ +#define ASYNCB_INITIALIZED 31 /* Serial port was initialized */ +#define ASYNCB_SUSPENDED 30 /* Serial port is suspended */ +#define ASYNCB_NORMAL_ACTIVE 29 /* Normal device is active */ +#define ASYNCB_BOOT_AUTOCONF 28 /* Autoconfigure port on bootup */ +#define ASYNCB_CLOSING 27 /* Serial port is closing */ +#define ASYNCB_CTS_FLOW 26 /* Do CTS flow control */ +#define ASYNCB_CHECK_CD 25 /* i.e., CLOCAL */ +#define ASYNCB_SHARE_IRQ 24 /* for multifunction cards, no longer used */ +#define ASYNCB_CONS_FLOW 23 /* flow control for console */ +#define ASYNCB_FIRST_KERNEL 22 + +#define ASYNC_HUP_NOTIFY (1U << ASYNCB_HUP_NOTIFY) +#define ASYNC_SUSPENDED (1U << ASYNCB_SUSPENDED) +#define ASYNC_FOURPORT (1U << ASYNCB_FOURPORT) +#define ASYNC_SAK (1U << ASYNCB_SAK) +#define ASYNC_SPLIT_TERMIOS (1U << ASYNCB_SPLIT_TERMIOS) +#define ASYNC_SPD_HI (1U << ASYNCB_SPD_HI) +#define ASYNC_SPD_VHI (1U << ASYNCB_SPD_VHI) +#define ASYNC_SKIP_TEST (1U << ASYNCB_SKIP_TEST) +#define ASYNC_AUTO_IRQ (1U << ASYNCB_AUTO_IRQ) +#define ASYNC_SESSION_LOCKOUT (1U << ASYNCB_SESSION_LOCKOUT) +#define ASYNC_PGRP_LOCKOUT (1U << ASYNCB_PGRP_LOCKOUT) +#define ASYNC_CALLOUT_NOHUP (1U << ASYNCB_CALLOUT_NOHUP) +#define ASYNC_HARDPPS_CD (1U << ASYNCB_HARDPPS_CD) +#define ASYNC_SPD_SHI (1U << ASYNCB_SPD_SHI) +#define ASYNC_LOW_LATENCY (1U << ASYNCB_LOW_LATENCY) +#define ASYNC_BUGGY_UART (1U << ASYNCB_BUGGY_UART) +#define ASYNC_AUTOPROBE (1U << ASYNCB_AUTOPROBE) + +#define ASYNC_FLAGS ((1U << (ASYNCB_LAST_USER + 1)) - 1) +#define ASYNC_USR_MASK (ASYNC_SPD_MASK|ASYNC_CALLOUT_NOHUP| \ + ASYNC_LOW_LATENCY) +#define ASYNC_SPD_CUST (ASYNC_SPD_HI|ASYNC_SPD_VHI) +#define ASYNC_SPD_WARP (ASYNC_SPD_HI|ASYNC_SPD_SHI) +#define ASYNC_SPD_MASK (ASYNC_SPD_HI|ASYNC_SPD_VHI|ASYNC_SPD_SHI) + +#define ASYNC_INITIALIZED (1U << ASYNCB_INITIALIZED) +#define ASYNC_NORMAL_ACTIVE (1U << ASYNCB_NORMAL_ACTIVE) +#define ASYNC_BOOT_AUTOCONF (1U << ASYNCB_BOOT_AUTOCONF) +#define ASYNC_CLOSING (1U << ASYNCB_CLOSING) +#define ASYNC_CTS_FLOW (1U << ASYNCB_CTS_FLOW) +#define ASYNC_CHECK_CD (1U << ASYNCB_CHECK_CD) +#define ASYNC_SHARE_IRQ (1U << ASYNCB_SHARE_IRQ) +#define ASYNC_CONS_FLOW (1U << ASYNCB_CONS_FLOW) +#define ASYNC_INTERNAL_FLAGS (~((1U << ASYNCB_FIRST_KERNEL) - 1)) + +#endif From 833462e94cf091ef11f34219ca92d093ff9d2c3c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= Date: Mon, 20 Aug 2012 09:57:04 +0200 Subject: [PATCH 145/235] serial/imx: improve error diagnosics for clock and pinctrl failures MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit These error paths are used more often now after deep changes to the clock code and pinctrl is still new for imx. So help debugging and give clues in the boot log. Signed-off-by: Uwe Kleine-König Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 20e91172402..72ec56e6d42 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1505,18 +1505,21 @@ static int serial_imx_probe(struct platform_device *pdev) pinctrl = devm_pinctrl_get_select_default(&pdev->dev); if (IS_ERR(pinctrl)) { ret = PTR_ERR(pinctrl); + dev_err(&pdev->dev, "failed to get default pinctrl: %d\n", ret); goto unmap; } sport->clk_ipg = devm_clk_get(&pdev->dev, "ipg"); if (IS_ERR(sport->clk_ipg)) { ret = PTR_ERR(sport->clk_ipg); + dev_err(&pdev->dev, "failed to get ipg clk: %d\n", ret); goto unmap; } sport->clk_per = devm_clk_get(&pdev->dev, "per"); if (IS_ERR(sport->clk_per)) { ret = PTR_ERR(sport->clk_per); + dev_err(&pdev->dev, "failed to get per clk: %d\n", ret); goto unmap; } From b8ede90cce2c63c5c592acb5d756cc14fcac448a Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Mon, 20 Aug 2012 19:56:26 -0400 Subject: [PATCH 146/235] m32r_sio: remove dependency on struct serial_uart_config The struct serial_uart_config is hardly used at all, and the use case like this one are somewhat needless. Remove the trivial usage so that we can remove serial_uart_config. Since the type field isn't really used at all, we also delete the initialization and references of it here as well. Cc: Hirokazu Takata Signed-off-by: Paul Gortmaker Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/m32r_sio.c | 36 ++--------------------------------- 1 file changed, 2 insertions(+), 34 deletions(-) diff --git a/drivers/tty/serial/m32r_sio.c b/drivers/tty/serial/m32r_sio.c index a0703624d5e..b13949ad340 100644 --- a/drivers/tty/serial/m32r_sio.c +++ b/drivers/tty/serial/m32r_sio.c @@ -44,8 +44,6 @@ #include #include -#define PORT_M32R_BASE PORT_M32R_SIO -#define PORT_INDEX(x) (x - PORT_M32R_BASE + 1) #define BAUD_RATE 115200 #include @@ -132,22 +130,6 @@ struct irq_info { static struct irq_info irq_lists[NR_IRQS]; -/* - * Here we define the default xmit fifo size used for each type of UART. - */ -static const struct serial_uart_config uart_config[] = { - [PORT_UNKNOWN] = { - .name = "unknown", - .dfl_xmit_fifo_size = 1, - .flags = 0, - }, - [PORT_INDEX(PORT_M32R_SIO)] = { - .name = "M32RSIO", - .dfl_xmit_fifo_size = 1, - .flags = 0, - }, -}; - #ifdef CONFIG_SERIAL_M32R_PLDSIO #define __sio_in(x) inw((unsigned long)(x)) @@ -907,8 +889,7 @@ static void m32r_sio_config_port(struct uart_port *port, int unused) spin_lock_irqsave(&up->port.lock, flags); - up->port.type = (PORT_M32R_SIO - PORT_M32R_BASE + 1); - up->port.fifosize = uart_config[up->port.type].dfl_xmit_fifo_size; + up->port.fifosize = 1; spin_unlock_irqrestore(&up->port.lock, flags); } @@ -916,23 +897,11 @@ static void m32r_sio_config_port(struct uart_port *port, int unused) static int m32r_sio_verify_port(struct uart_port *port, struct serial_struct *ser) { - if (ser->irq >= nr_irqs || ser->irq < 0 || - ser->baud_base < 9600 || ser->type < PORT_UNKNOWN || - ser->type >= ARRAY_SIZE(uart_config)) + if (ser->irq >= nr_irqs || ser->irq < 0 || ser->baud_base < 9600) return -EINVAL; return 0; } -static const char * -m32r_sio_type(struct uart_port *port) -{ - int type = port->type; - - if (type >= ARRAY_SIZE(uart_config)) - type = 0; - return uart_config[type].name; -} - static struct uart_ops m32r_sio_pops = { .tx_empty = m32r_sio_tx_empty, .set_mctrl = m32r_sio_set_mctrl, @@ -946,7 +915,6 @@ static struct uart_ops m32r_sio_pops = { .shutdown = m32r_sio_shutdown, .set_termios = m32r_sio_set_termios, .pm = m32r_sio_pm, - .type = m32r_sio_type, .release_port = m32r_sio_release_port, .request_port = m32r_sio_request_port, .config_port = m32r_sio_config_port, From e2c654254e3379f69ce4a2e3f322374dd071337d Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Mon, 20 Aug 2012 19:56:27 -0400 Subject: [PATCH 147/235] serial: sunsu.c - don't explicitly tie array size to dynamic entity The addition of 8250-like entities continues to grow, while this driver has a snapshot of a select few common 8250 UARTs. So it has no need to grow with the new additions, since it calls out its own (largely historic) static list which does not grow. Cc: "David S. Miller" Signed-off-by: Paul Gortmaker Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sunsu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index 675303b8ed8..d9190957a5f 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -61,7 +61,7 @@ static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; /* * Here we define the default xmit fifo size used for each type of UART. */ -static const struct serial_uart_config uart_config[PORT_MAX_8250+1] = { +static const struct serial_uart_config uart_config[] = { { "unknown", 1, 0 }, { "8250", 1, 0 }, { "16450", 1, 0 }, From 4b71598b6a1e72d11a657ccd67bdb14f1c269186 Mon Sep 17 00:00:00 2001 From: Paul Gortmaker Date: Mon, 20 Aug 2012 19:56:28 -0400 Subject: [PATCH 148/235] serial: diminish usage of struct serial_uart_config This structure might have made sense many years ago, but at this point it is only used in one specific driver, and referenced in stale comments elsewhere. Rather than change the sunsu.c driver, simply move the struct to be within the exclusive domain of that driver, so it won't get inadvertently picked up and used by other serial drivers going forward. The comments referencing the now driver specific struct are updated accordingly. Note that 8250.c has a struct that is similar in usage, with the name serial8250_config; but is 100% independent and untouched here. Cc: "David S. Miller" Signed-off-by: Paul Gortmaker Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/staging/speakup/serialio.h | 3 +-- drivers/tty/serial/8250/8250.h | 3 --- drivers/tty/serial/sunsu.c | 6 ++++++ include/linux/serial.h | 6 ------ 4 files changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/staging/speakup/serialio.h b/drivers/staging/speakup/serialio.h index 614271f9b99..55d68b5ad16 100644 --- a/drivers/staging/speakup/serialio.h +++ b/drivers/staging/speakup/serialio.h @@ -1,8 +1,7 @@ #ifndef _SPEAKUP_SERIAL_H #define _SPEAKUP_SERIAL_H -#include /* for rs_table, serial constants & - serial_uart_config */ +#include /* for rs_table, serial constants */ #include /* for more serial constants */ #ifndef __sparc__ #include diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 972b5212b58..0c5e908df0b 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -26,9 +26,6 @@ struct old_serial_port { unsigned long irqflags; }; -/* - * This replaces serial_uart_config in include/linux/serial.h - */ struct serial8250_config { const char *name; unsigned short fifo_size; diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c index d9190957a5f..b97913dcdbf 100644 --- a/drivers/tty/serial/sunsu.c +++ b/drivers/tty/serial/sunsu.c @@ -58,6 +58,12 @@ enum su_type { SU_PORT_NONE, SU_PORT_MS, SU_PORT_KBD, SU_PORT_PORT }; static char *su_typev[] = { "su(???)", "su(mouse)", "su(kbd)", "su(serial)" }; +struct serial_uart_config { + char *name; + int dfl_xmit_fifo_size; + int flags; +}; + /* * Here we define the default xmit fifo size used for each type of UART. */ diff --git a/include/linux/serial.h b/include/linux/serial.h index 3504f428ce6..861e51de476 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -86,12 +86,6 @@ struct serial_struct { #define SERIAL_IO_HUB6 1 #define SERIAL_IO_MEM 2 -struct serial_uart_config { - char *name; - int dfl_xmit_fifo_size; - int flags; -}; - #define UART_CLEAR_FIFO 0x01 #define UART_USE_FIFO 0x02 #define UART_STARTECH 0x04 From 32614aad30549b0e4caf44c26efe8e2b09d597ce Mon Sep 17 00:00:00 2001 From: Matthew Leach Date: Tue, 28 Aug 2012 16:41:28 +0100 Subject: [PATCH 149/235] serial: pl011: honour serial aliases in device tree If the order of UART nodes is changed in the device tree, then tty dev devices are attached to different serial ports causing the console to be directed to a different physical serial port. The "serial" aliases in the device tree should prevent this. This patch ensures that the UART driver creates tty devices that honour these aliases if a device tree is present. Acked-by: Linus Walleij Reviewed-by: Will Deacon Acked-by: Rob Herring Signed-off-by: Matthew Leach Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 36 +++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 3322023e38a..05c15ec7bd2 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -52,6 +52,8 @@ #include #include #include +#include +#include #include #include @@ -1862,6 +1864,38 @@ static struct uart_driver amba_reg = { .cons = AMBA_CONSOLE, }; +static int pl011_probe_dt_alias(int index, struct device *dev) +{ + struct device_node *np; + static bool seen_dev_with_alias = false; + static bool seen_dev_without_alias = false; + int ret = index; + + if (!IS_ENABLED(CONFIG_OF)) + return ret; + + np = dev->of_node; + if (!np) + return ret; + + ret = of_alias_get_id(np, "serial"); + if (IS_ERR_VALUE(ret)) { + seen_dev_without_alias = true; + ret = index; + } else { + seen_dev_with_alias = true; + if (ret >= ARRAY_SIZE(amba_ports) || amba_ports[ret] != NULL) { + dev_warn(dev, "requested serial port %d not available.\n", ret); + ret = index; + } + } + + if (seen_dev_with_alias && seen_dev_without_alias) + dev_warn(dev, "aliased and non-aliased serial devices found in device tree. Serial port enumeration may be unpredictable.\n"); + + return ret; +} + static int pl011_probe(struct amba_device *dev, const struct amba_id *id) { struct uart_amba_port *uap; @@ -1884,6 +1918,8 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) goto out; } + i = pl011_probe_dt_alias(i, &dev->dev); + base = ioremap(dev->res.start, resource_size(&dev->res)); if (!base) { ret = -ENOMEM; From d20925e1e4fbd501754efad5401040d700fae4d6 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Wed, 5 Sep 2012 10:30:10 +0530 Subject: [PATCH 150/235] serial: Samsung: Replace printk with dev_* functions Silences checkpatch warnings regarding use of printks. Signed-off-by: Sachin Kamat Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 5c5e7e09f23..8749a07dbea 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -459,7 +459,7 @@ static int s3c24xx_serial_startup(struct uart_port *port) s3c24xx_serial_portname(port), ourport); if (ret != 0) { - printk(KERN_ERR "cannot get irq %d\n", ourport->rx_irq); + dev_err(port->dev, "cannot get irq %d\n", ourport->rx_irq); return ret; } @@ -473,7 +473,7 @@ static int s3c24xx_serial_startup(struct uart_port *port) s3c24xx_serial_portname(port), ourport); if (ret) { - printk(KERN_ERR "cannot get irq %d\n", ourport->tx_irq); + dev_err(port->dev, "cannot get irq %d\n", ourport->tx_irq); goto err; } @@ -502,7 +502,7 @@ static int s3c64xx_serial_startup(struct uart_port *port) ret = request_irq(port->irq, s3c64xx_serial_handle_irq, IRQF_SHARED, s3c24xx_serial_portname(port), ourport); if (ret) { - printk(KERN_ERR "cannot get irq %d\n", port->irq); + dev_err(port->dev, "cannot get irq %d\n", port->irq); return ret; } @@ -543,7 +543,7 @@ static void s3c24xx_serial_pm(struct uart_port *port, unsigned int level, break; default: - printk(KERN_ERR "s3c24xx_serial: unknown pm %d\n", level); + dev_err(port->dev, "s3c24xx_serial: unknown pm %d\n", level); } } @@ -1038,7 +1038,7 @@ static int s3c24xx_serial_cpufreq_transition(struct notifier_block *nb, termios = &tty->termios; if (termios == NULL) { - printk(KERN_WARNING "%s: no termios?\n", __func__); + dev_warn(uport->dev, "%s: no termios?\n", __func__); goto exit; } @@ -1113,7 +1113,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, res = platform_get_resource(platdev, IORESOURCE_MEM, 0); if (res == NULL) { - printk(KERN_ERR "failed to find memory resource for uart\n"); + dev_err(port->dev, "failed to find memory resource for uart\n"); return -EINVAL; } @@ -1683,7 +1683,7 @@ static int __init s3c24xx_serial_modinit(void) ret = uart_register_driver(&s3c24xx_uart_drv); if (ret < 0) { - printk(KERN_ERR "failed to register UART driver\n"); + pr_err("Failed to register Samsung UART driver\n"); return -1; } From 9303ac158fcd5f69c032e06391a9a12d3ccb343e Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Wed, 5 Sep 2012 10:30:11 +0530 Subject: [PATCH 151/235] serial: Samsung: Silence some checkpatch errors and warnings Fixes the following errors and warnings: ERROR: trailing whitespace ERROR: return is not a function, parentheses are not required WARNING: suspect code indent for conditional statements (32, 36) Signed-off-by: Sachin Kamat Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 8749a07dbea..bdaa06f3ab6 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -82,7 +82,7 @@ static inline const char *s3c24xx_serial_portname(struct uart_port *port) static int s3c24xx_serial_txempty_nofifo(struct uart_port *port) { - return (rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE); + return rd_regl(port, S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE; } /* @@ -268,7 +268,7 @@ s3c24xx_serial_rx_chars(int irq, void *dev_id) dbg("break!\n"); port->icount.brk++; if (uart_handle_break(port)) - goto ignore_char; + goto ignore_char; } if (uerstat & S3C2410_UERSTAT_FRAME) @@ -1129,7 +1129,7 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ourport->rx_irq = ret; ourport->tx_irq = ret + 1; } - + ret = platform_get_irq(platdev, 1); if (ret > 0) ourport->tx_irq = ret; From 6971c635af27b1d18d409e337e70bae25d2fa8ec Mon Sep 17 00:00:00 2001 From: Guainluca Anzolin Date: Tue, 4 Sep 2012 15:56:12 +0100 Subject: [PATCH 152/235] parport_serial: Add support for the WCH353 2S/1P multi-IO card To allow parport_serial to handle the card the same PCI ids are blacklisted in 8250_pci.c using the existing software blacklist mechanism. The blacklist array is also renamed because it now covers this new use case. Since the two serial ports are auto-detected as XScale instead of 16550A clones, we also add a quirk to 8250_pci.c to skip autodetection and set the correct port type. Signed-off-by: Gianluca Anzolin [Fold in fixes for the uart_8250 change] Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_serial.c | 11 ++++++++- drivers/tty/serial/8250/8250_pci.c | 38 +++++++++++++++++++++++------- 2 files changed, 40 insertions(+), 9 deletions(-) diff --git a/drivers/parport/parport_serial.c b/drivers/parport/parport_serial.c index e9c32274df3..1631eeaf440 100644 --- a/drivers/parport/parport_serial.c +++ b/drivers/parport/parport_serial.c @@ -62,6 +62,7 @@ enum parport_pc_pci_cards { timedia_9079a, timedia_9079b, timedia_9079c, + wch_ch353_2s1p, }; /* each element directly indexed from enum list, above */ @@ -145,6 +146,7 @@ static struct parport_pc_pci cards[] __devinitdata = { /* timedia_9079a */ { 1, { { 2, 3 }, } }, /* timedia_9079b */ { 1, { { 2, 3 }, } }, /* timedia_9079c */ { 1, { { 2, 3 }, } }, + /* wch_ch353_2s1p*/ { 1, { { 2, -1}, } }, }; static struct pci_device_id parport_serial_pci_tbl[] = { @@ -243,7 +245,8 @@ static struct pci_device_id parport_serial_pci_tbl[] = { { 0x1409, 0x7168, 0x1409, 0xb079, 0, 0, timedia_9079a }, { 0x1409, 0x7168, 0x1409, 0xc079, 0, 0, timedia_9079b }, { 0x1409, 0x7168, 0x1409, 0xd079, 0, 0, timedia_9079c }, - + /* WCH CARDS */ + { 0x4348, 0x7053, 0x4348, 0x3253, 0, 0, wch_ch353_2s1p}, { 0, } /* terminate list */ }; MODULE_DEVICE_TABLE(pci,parport_serial_pci_tbl); @@ -460,6 +463,12 @@ static struct pciserial_board pci_parport_serial_boards[] __devinitdata = { .base_baud = 921600, .uart_offset = 8, }, + [wch_ch353_2s1p] = { + .flags = FL_BASE0|FL_BASE_BARS, + .num_ports = 2, + .base_baud = 115200, + .uart_offset = 8, + }, }; struct parport_serial_private { diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index ad4bb8dec36..803d313e061 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1164,6 +1164,16 @@ pci_xr17c154_setup(struct serial_private *priv, return pci_default_setup(priv, board, port, idx); } +static int +pci_wch_ch353_setup(struct serial_private *priv, + const struct pciserial_board *board, + struct uart_8250_port *port, int idx) +{ + port->port.flags |= UPF_FIXED_TYPE; + port->port.type = PORT_16550A; + return pci_default_setup(priv, board, port, idx); +} + #define PCI_VENDOR_ID_SBSMODULARIO 0x124B #define PCI_SUBVENDOR_ID_SBSMODULARIO 0x124B #define PCI_DEVICE_ID_OCTPRO 0x0001 @@ -1737,6 +1747,14 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { .subdevice = PCI_ANY_ID, .setup = pci_omegapci_setup, }, + /* WCH CH353 2S1P card (16550 clone) */ + { + .vendor = 0x4348, + .device = 0x7053, + .subvendor = 0x4348, + .subdevice = 0x3253, + .setup = pci_wch_ch353_setup, + }, /* * ASIX devices with FIFO bug */ @@ -2636,10 +2654,14 @@ static struct pciserial_board pci_boards[] __devinitdata = { }, }; -static const struct pci_device_id softmodem_blacklist[] = { +static const struct pci_device_id blacklist[] = { + /* softmodems */ { PCI_VDEVICE(AL, 0x5457), }, /* ALi Corporation M5457 AC'97 Modem */ { PCI_VDEVICE(MOTOROLA, 0x3052), }, /* Motorola Si3052-based modem */ { PCI_DEVICE(0x1543, 0x3052), }, /* Si3052-based modem, default IDs */ + + /* multi-io cards handled by parport_serial */ + { PCI_DEVICE(0x4348, 0x7053), }, /* WCH CH353 2S1P */ }; /* @@ -2650,7 +2672,7 @@ static const struct pci_device_id softmodem_blacklist[] = { static int __devinit serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) { - const struct pci_device_id *blacklist; + const struct pci_device_id *bldev; int num_iomem, num_port, first_port = -1, i; /* @@ -2667,13 +2689,13 @@ serial_pci_guess_board(struct pci_dev *dev, struct pciserial_board *board) /* * Do not access blacklisted devices that are known not to - * feature serial ports. + * feature serial ports or are handled by other modules. */ - for (blacklist = softmodem_blacklist; - blacklist < softmodem_blacklist + ARRAY_SIZE(softmodem_blacklist); - blacklist++) { - if (dev->vendor == blacklist->vendor && - dev->device == blacklist->device) + for (bldev = blacklist; + bldev < blacklist + ARRAY_SIZE(blacklist); + bldev++) { + if (dev->vendor == bldev->vendor && + dev->device == bldev->device) return -ENODEV; } From 1d65c0b12656d9f3bc29bb19f2d7441832433f03 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Sat, 25 Aug 2012 19:24:19 +0400 Subject: [PATCH 153/235] serial: New serial driver SCCNXP This driver is a replacement for a SC26XX driver with a lot of improvements and new features. The main differences from the SC26XX driver: - Removed dependency on MIPS. Driver can be used on any platform. - Added support for SCC2681, SCC2691, SCC2692, SC28L91, SC28L92, SC28L202, SCC68681 and SCC68692 ICs. - Using devm_-related functions. - Improved error handling of serial port, improved FIFO handling. - Ability to load multiple instances of drivers. To avoid the possibility of regression, driver SC26XX left in the system to confirm the stability of the driver on platforms where it is being used. Signed-off-by: Alexander Shiyan Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 18 + drivers/tty/serial/Makefile | 1 + drivers/tty/serial/sccnxp.c | 985 +++++++++++++++++++++++++++ include/linux/platform_data/sccnxp.h | 93 +++ 4 files changed, 1097 insertions(+) create mode 100644 drivers/tty/serial/sccnxp.c create mode 100644 include/linux/platform_data/sccnxp.h diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 04b9e13045d..26907cf2574 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1130,6 +1130,24 @@ config SERIAL_SC26XX_CONSOLE help Support for Console on SC2681/SC2692 serial ports. +config SERIAL_SCCNXP + bool "SCCNXP serial port support" + depends on !SERIAL_SC26XX + select SERIAL_CORE + default n + help + This selects support for an advanced UART from NXP (Philips). + Supported ICs are SCC2681, SCC2691, SCC2692, SC28L91, SC28L92, + SC28L202, SCC68681 and SCC68692. + Positioned as a replacement for the driver SC26XX. + +config SERIAL_SCCNXP_CONSOLE + bool "Console on SCCNXP serial port" + depends on SERIAL_SCCNXP + select SERIAL_CORE_CONSOLE + help + Support for console on SCCNXP serial ports. + config SERIAL_BFIN_SPORT tristate "Blackfin SPORT emulate UART" depends on BLACKFIN diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index 2af9e5279da..ce88667cfd1 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -48,6 +48,7 @@ obj-$(CONFIG_SERIAL_MPSC) += mpsc.o obj-$(CONFIG_SERIAL_SB1250_DUART) += sb1250-duart.o obj-$(CONFIG_ETRAX_SERIAL) += crisv10.o obj-$(CONFIG_SERIAL_SC26XX) += sc26xx.o +obj-$(CONFIG_SERIAL_SCCNXP) += sccnxp.o obj-$(CONFIG_SERIAL_JSM) += jsm/ obj-$(CONFIG_SERIAL_TXX9) += serial_txx9.o obj-$(CONFIG_SERIAL_VR41XX) += vr41xx_siu.o diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c new file mode 100644 index 00000000000..29dda9ba6f0 --- /dev/null +++ b/drivers/tty/serial/sccnxp.c @@ -0,0 +1,985 @@ +/* + * NXP (Philips) SCC+++(SCN+++) serial driver + * + * Copyright (C) 2012 Alexander Shiyan + * + * Based on sc26xx.c, by Thomas Bogendörfer (tsbogend@alpha.franken.de) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#if defined(CONFIG_SERIAL_SCCNXP_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) +#define SUPPORT_SYSRQ +#endif + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SCCNXP_NAME "uart-sccnxp" +#define SCCNXP_MAJOR 204 +#define SCCNXP_MINOR 205 + +#define SCCNXP_MR_REG (0x00) +# define MR0_BAUD_NORMAL (0 << 0) +# define MR0_BAUD_EXT1 (1 << 0) +# define MR0_BAUD_EXT2 (5 << 0) +# define MR0_FIFO (1 << 3) +# define MR0_TXLVL (1 << 4) +# define MR1_BITS_5 (0 << 0) +# define MR1_BITS_6 (1 << 0) +# define MR1_BITS_7 (2 << 0) +# define MR1_BITS_8 (3 << 0) +# define MR1_PAR_EVN (0 << 2) +# define MR1_PAR_ODD (1 << 2) +# define MR1_PAR_NO (4 << 2) +# define MR2_STOP1 (7 << 0) +# define MR2_STOP2 (0xf << 0) +#define SCCNXP_SR_REG (0x01) +#define SCCNXP_CSR_REG SCCNXP_SR_REG +# define SR_RXRDY (1 << 0) +# define SR_FULL (1 << 1) +# define SR_TXRDY (1 << 2) +# define SR_TXEMT (1 << 3) +# define SR_OVR (1 << 4) +# define SR_PE (1 << 5) +# define SR_FE (1 << 6) +# define SR_BRK (1 << 7) +#define SCCNXP_CR_REG (0x02) +# define CR_RX_ENABLE (1 << 0) +# define CR_RX_DISABLE (1 << 1) +# define CR_TX_ENABLE (1 << 2) +# define CR_TX_DISABLE (1 << 3) +# define CR_CMD_MRPTR1 (0x01 << 4) +# define CR_CMD_RX_RESET (0x02 << 4) +# define CR_CMD_TX_RESET (0x03 << 4) +# define CR_CMD_STATUS_RESET (0x04 << 4) +# define CR_CMD_BREAK_RESET (0x05 << 4) +# define CR_CMD_START_BREAK (0x06 << 4) +# define CR_CMD_STOP_BREAK (0x07 << 4) +# define CR_CMD_MRPTR0 (0x0b << 4) +#define SCCNXP_RHR_REG (0x03) +#define SCCNXP_THR_REG SCCNXP_RHR_REG +#define SCCNXP_IPCR_REG (0x04) +#define SCCNXP_ACR_REG SCCNXP_IPCR_REG +# define ACR_BAUD0 (0 << 7) +# define ACR_BAUD1 (1 << 7) +# define ACR_TIMER_MODE (6 << 4) +#define SCCNXP_ISR_REG (0x05) +#define SCCNXP_IMR_REG SCCNXP_ISR_REG +# define IMR_TXRDY (1 << 0) +# define IMR_RXRDY (1 << 1) +# define ISR_TXRDY(x) (1 << ((x * 4) + 0)) +# define ISR_RXRDY(x) (1 << ((x * 4) + 1)) +#define SCCNXP_IPR_REG (0x0d) +#define SCCNXP_OPCR_REG SCCNXP_IPR_REG +#define SCCNXP_SOP_REG (0x0e) +#define SCCNXP_ROP_REG (0x0f) + +/* Route helpers */ +#define MCTRL_MASK(sig) (0xf << (sig)) +#define MCTRL_IBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_IP0) +#define MCTRL_OBIT(cfg, sig) ((((cfg) >> (sig)) & 0xf) - LINE_OP0) + +/* Supported chip types */ +enum { + SCCNXP_TYPE_SC2681 = 2681, + SCCNXP_TYPE_SC2691 = 2691, + SCCNXP_TYPE_SC2692 = 2692, + SCCNXP_TYPE_SC2891 = 2891, + SCCNXP_TYPE_SC2892 = 2892, + SCCNXP_TYPE_SC28202 = 28202, + SCCNXP_TYPE_SC68681 = 68681, + SCCNXP_TYPE_SC68692 = 68692, +}; + +struct sccnxp_port { + struct uart_driver uart; + struct uart_port port[SCCNXP_MAX_UARTS]; + + const char *name; + int irq; + + u8 imr; + u8 addr_mask; + int freq_std; + + int flags; +#define SCCNXP_HAVE_IO 0x00000001 +#define SCCNXP_HAVE_MR0 0x00000002 + +#ifdef CONFIG_SERIAL_SCCNXP_CONSOLE + struct console console; +#endif + + struct mutex sccnxp_mutex; + + struct sccnxp_pdata pdata; +}; + +static inline u8 sccnxp_raw_read(void __iomem *base, u8 reg, u8 shift) +{ + return readb(base + (reg << shift)); +} + +static inline void sccnxp_raw_write(void __iomem *base, u8 reg, u8 shift, u8 v) +{ + writeb(v, base + (reg << shift)); +} + +static inline u8 sccnxp_read(struct uart_port *port, u8 reg) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + return sccnxp_raw_read(port->membase, reg & s->addr_mask, + port->regshift); +} + +static inline void sccnxp_write(struct uart_port *port, u8 reg, u8 v) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + sccnxp_raw_write(port->membase, reg & s->addr_mask, port->regshift, v); +} + +static inline u8 sccnxp_port_read(struct uart_port *port, u8 reg) +{ + return sccnxp_read(port, (port->line << 3) + reg); +} + +static inline void sccnxp_port_write(struct uart_port *port, u8 reg, u8 v) +{ + sccnxp_write(port, (port->line << 3) + reg, v); +} + +static int sccnxp_update_best_err(int a, int b, int *besterr) +{ + int err = abs(a - b); + + if ((*besterr < 0) || (*besterr > err)) { + *besterr = err; + return 0; + } + + return 1; +} + +struct baud_table { + u8 csr; + u8 acr; + u8 mr0; + int baud; +}; + +const struct baud_table baud_std[] = { + { 0, ACR_BAUD0, MR0_BAUD_NORMAL, 50, }, + { 0, ACR_BAUD1, MR0_BAUD_NORMAL, 75, }, + { 1, ACR_BAUD0, MR0_BAUD_NORMAL, 110, }, + { 2, ACR_BAUD0, MR0_BAUD_NORMAL, 134, }, + { 3, ACR_BAUD1, MR0_BAUD_NORMAL, 150, }, + { 3, ACR_BAUD0, MR0_BAUD_NORMAL, 200, }, + { 4, ACR_BAUD0, MR0_BAUD_NORMAL, 300, }, + { 0, ACR_BAUD1, MR0_BAUD_EXT1, 450, }, + { 1, ACR_BAUD0, MR0_BAUD_EXT2, 880, }, + { 3, ACR_BAUD1, MR0_BAUD_EXT1, 900, }, + { 5, ACR_BAUD0, MR0_BAUD_NORMAL, 600, }, + { 7, ACR_BAUD0, MR0_BAUD_NORMAL, 1050, }, + { 2, ACR_BAUD0, MR0_BAUD_EXT2, 1076, }, + { 6, ACR_BAUD0, MR0_BAUD_NORMAL, 1200, }, + { 10, ACR_BAUD1, MR0_BAUD_NORMAL, 1800, }, + { 7, ACR_BAUD1, MR0_BAUD_NORMAL, 2000, }, + { 8, ACR_BAUD0, MR0_BAUD_NORMAL, 2400, }, + { 5, ACR_BAUD1, MR0_BAUD_EXT1, 3600, }, + { 9, ACR_BAUD0, MR0_BAUD_NORMAL, 4800, }, + { 10, ACR_BAUD0, MR0_BAUD_NORMAL, 7200, }, + { 11, ACR_BAUD0, MR0_BAUD_NORMAL, 9600, }, + { 8, ACR_BAUD0, MR0_BAUD_EXT1, 14400, }, + { 12, ACR_BAUD1, MR0_BAUD_NORMAL, 19200, }, + { 9, ACR_BAUD0, MR0_BAUD_EXT1, 28800, }, + { 12, ACR_BAUD0, MR0_BAUD_NORMAL, 38400, }, + { 11, ACR_BAUD0, MR0_BAUD_EXT1, 57600, }, + { 12, ACR_BAUD1, MR0_BAUD_EXT1, 115200, }, + { 12, ACR_BAUD0, MR0_BAUD_EXT1, 230400, }, + { 0, 0, 0, 0 } +}; + +static void sccnxp_set_baud(struct uart_port *port, int baud) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + int div_std, tmp_baud, bestbaud = baud, besterr = -1; + u8 i, acr = 0, csr = 0, mr0 = 0; + + /* Find best baud from table */ + for (i = 0; baud_std[i].baud && besterr; i++) { + if (baud_std[i].mr0 && !(s->flags & SCCNXP_HAVE_MR0)) + continue; + div_std = DIV_ROUND_CLOSEST(s->freq_std, baud_std[i].baud); + tmp_baud = DIV_ROUND_CLOSEST(port->uartclk, div_std); + if (!sccnxp_update_best_err(baud, tmp_baud, &besterr)) { + acr = baud_std[i].acr; + csr = baud_std[i].csr; + mr0 = baud_std[i].mr0; + bestbaud = tmp_baud; + } + } + + if (s->flags & SCCNXP_HAVE_MR0) { + /* Enable FIFO, set half level for TX */ + mr0 |= MR0_FIFO | MR0_TXLVL; + /* Update MR0 */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_MRPTR0); + sccnxp_port_write(port, SCCNXP_MR_REG, mr0); + } + + sccnxp_port_write(port, SCCNXP_ACR_REG, acr | ACR_TIMER_MODE); + sccnxp_port_write(port, SCCNXP_CSR_REG, (csr << 4) | csr); + + dev_dbg(port->dev, "Baudrate desired: %i, calculated: %i\n", + baud, bestbaud); +} + +static void sccnxp_enable_irq(struct uart_port *port, int mask) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + s->imr |= mask << (port->line * 4); + sccnxp_write(port, SCCNXP_IMR_REG, s->imr); +} + +static void sccnxp_disable_irq(struct uart_port *port, int mask) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + s->imr &= ~(mask << (port->line * 4)); + sccnxp_write(port, SCCNXP_IMR_REG, s->imr); +} + +static void sccnxp_set_bit(struct uart_port *port, int sig, int state) +{ + u8 bitmask; + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(sig)) { + bitmask = 1 << MCTRL_OBIT(s->pdata.mctrl_cfg[port->line], sig); + if (state) + sccnxp_write(port, SCCNXP_SOP_REG, bitmask); + else + sccnxp_write(port, SCCNXP_ROP_REG, bitmask); + } +} + +static void sccnxp_handle_rx(struct uart_port *port) +{ + u8 sr; + unsigned int ch, flag; + struct tty_struct *tty = tty_port_tty_get(&port->state->port); + + if (!tty) + return; + + for (;;) { + sr = sccnxp_port_read(port, SCCNXP_SR_REG); + if (!(sr & SR_RXRDY)) + break; + sr &= SR_PE | SR_FE | SR_OVR | SR_BRK; + + ch = sccnxp_port_read(port, SCCNXP_RHR_REG); + + port->icount.rx++; + flag = TTY_NORMAL; + + if (unlikely(sr)) { + if (sr & SR_BRK) { + port->icount.brk++; + if (uart_handle_break(port)) + continue; + } else if (sr & SR_PE) + port->icount.parity++; + else if (sr & SR_FE) + port->icount.frame++; + else if (sr & SR_OVR) + port->icount.overrun++; + + sr &= port->read_status_mask; + if (sr & SR_BRK) + flag = TTY_BREAK; + else if (sr & SR_PE) + flag = TTY_PARITY; + else if (sr & SR_FE) + flag = TTY_FRAME; + else if (sr & SR_OVR) + flag = TTY_OVERRUN; + } + + if (uart_handle_sysrq_char(port, ch)) + continue; + + if (sr & port->ignore_status_mask) + continue; + + uart_insert_char(port, sr, SR_OVR, ch, flag); + } + + tty_flip_buffer_push(tty); + + tty_kref_put(tty); +} + +static void sccnxp_handle_tx(struct uart_port *port) +{ + u8 sr; + struct circ_buf *xmit = &port->state->xmit; + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + if (unlikely(port->x_char)) { + sccnxp_port_write(port, SCCNXP_THR_REG, port->x_char); + port->icount.tx++; + port->x_char = 0; + return; + } + + if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { + /* Disable TX if FIFO is empty */ + if (sccnxp_port_read(port, SCCNXP_SR_REG) & SR_TXEMT) { + sccnxp_disable_irq(port, IMR_TXRDY); + + /* Set direction to input */ + if (s->flags & SCCNXP_HAVE_IO) + sccnxp_set_bit(port, DIR_OP, 0); + } + return; + } + + while (!uart_circ_empty(xmit)) { + sr = sccnxp_port_read(port, SCCNXP_SR_REG); + if (!(sr & SR_TXRDY)) + break; + + sccnxp_port_write(port, SCCNXP_THR_REG, xmit->buf[xmit->tail]); + xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); + port->icount.tx++; + } + + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + uart_write_wakeup(port); +} + +static irqreturn_t sccnxp_ist(int irq, void *dev_id) +{ + int i; + u8 isr; + struct sccnxp_port *s = (struct sccnxp_port *)dev_id; + + mutex_lock(&s->sccnxp_mutex); + + for (;;) { + isr = sccnxp_read(&s->port[0], SCCNXP_ISR_REG); + isr &= s->imr; + if (!isr) + break; + + dev_dbg(s->port[0].dev, "IRQ status: 0x%02x\n", isr); + + for (i = 0; i < s->uart.nr; i++) { + if (isr & ISR_RXRDY(i)) + sccnxp_handle_rx(&s->port[i]); + if (isr & ISR_TXRDY(i)) + sccnxp_handle_tx(&s->port[i]); + } + } + + mutex_unlock(&s->sccnxp_mutex); + + return IRQ_HANDLED; +} + +static void sccnxp_start_tx(struct uart_port *port) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + + /* Set direction to output */ + if (s->flags & SCCNXP_HAVE_IO) + sccnxp_set_bit(port, DIR_OP, 1); + + sccnxp_enable_irq(port, IMR_TXRDY); + + mutex_unlock(&s->sccnxp_mutex); +} + +static void sccnxp_stop_tx(struct uart_port *port) +{ + /* Do nothing */ +} + +static void sccnxp_stop_rx(struct uart_port *port) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_DISABLE); + mutex_unlock(&s->sccnxp_mutex); +} + +static unsigned int sccnxp_tx_empty(struct uart_port *port) +{ + u8 val; + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + val = sccnxp_port_read(port, SCCNXP_SR_REG); + mutex_unlock(&s->sccnxp_mutex); + + return (val & SR_TXEMT) ? TIOCSER_TEMT : 0; +} + +static void sccnxp_enable_ms(struct uart_port *port) +{ + /* Do nothing */ +} + +static void sccnxp_set_mctrl(struct uart_port *port, unsigned int mctrl) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + if (!(s->flags & SCCNXP_HAVE_IO)) + return; + + mutex_lock(&s->sccnxp_mutex); + + sccnxp_set_bit(port, DTR_OP, mctrl & TIOCM_DTR); + sccnxp_set_bit(port, RTS_OP, mctrl & TIOCM_RTS); + + mutex_unlock(&s->sccnxp_mutex); +} + +static unsigned int sccnxp_get_mctrl(struct uart_port *port) +{ + u8 bitmask, ipr; + struct sccnxp_port *s = dev_get_drvdata(port->dev); + unsigned int mctrl = TIOCM_DSR | TIOCM_CTS | TIOCM_CAR; + + if (!(s->flags & SCCNXP_HAVE_IO)) + return mctrl; + + mutex_lock(&s->sccnxp_mutex); + + ipr = ~sccnxp_read(port, SCCNXP_IPCR_REG); + + if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(DSR_IP)) { + bitmask = 1 << MCTRL_IBIT(s->pdata.mctrl_cfg[port->line], + DSR_IP); + mctrl &= ~TIOCM_DSR; + mctrl |= (ipr & bitmask) ? TIOCM_DSR : 0; + } + if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(CTS_IP)) { + bitmask = 1 << MCTRL_IBIT(s->pdata.mctrl_cfg[port->line], + CTS_IP); + mctrl &= ~TIOCM_CTS; + mctrl |= (ipr & bitmask) ? TIOCM_CTS : 0; + } + if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(DCD_IP)) { + bitmask = 1 << MCTRL_IBIT(s->pdata.mctrl_cfg[port->line], + DCD_IP); + mctrl &= ~TIOCM_CAR; + mctrl |= (ipr & bitmask) ? TIOCM_CAR : 0; + } + if (s->pdata.mctrl_cfg[port->line] & MCTRL_MASK(RNG_IP)) { + bitmask = 1 << MCTRL_IBIT(s->pdata.mctrl_cfg[port->line], + RNG_IP); + mctrl &= ~TIOCM_RNG; + mctrl |= (ipr & bitmask) ? TIOCM_RNG : 0; + } + + mutex_unlock(&s->sccnxp_mutex); + + return mctrl; +} + +static void sccnxp_break_ctl(struct uart_port *port, int break_state) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + sccnxp_port_write(port, SCCNXP_CR_REG, break_state ? + CR_CMD_START_BREAK : CR_CMD_STOP_BREAK); + mutex_unlock(&s->sccnxp_mutex); +} + +static void sccnxp_set_termios(struct uart_port *port, + struct ktermios *termios, struct ktermios *old) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + u8 mr1, mr2; + int baud; + + mutex_lock(&s->sccnxp_mutex); + + /* Mask termios capabilities we don't support */ + termios->c_cflag &= ~CMSPAR; + termios->c_iflag &= ~(IXON | IXOFF | IXANY); + + /* Disable RX & TX, reset break condition, status and FIFOs */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_RX_RESET | + CR_RX_DISABLE | CR_TX_DISABLE); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_TX_RESET); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_STATUS_RESET); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_BREAK_RESET); + + /* Word size */ + switch (termios->c_cflag & CSIZE) { + case CS5: + mr1 = MR1_BITS_5; + break; + case CS6: + mr1 = MR1_BITS_6; + break; + case CS7: + mr1 = MR1_BITS_7; + break; + default: + case CS8: + mr1 = MR1_BITS_8; + break; + } + + /* Parity */ + if (termios->c_cflag & PARENB) { + if (termios->c_cflag & PARODD) + mr1 |= MR1_PAR_ODD; + } else + mr1 |= MR1_PAR_NO; + + /* Stop bits */ + mr2 = (termios->c_cflag & CSTOPB) ? MR2_STOP2 : MR2_STOP1; + + /* Update desired format */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_MRPTR1); + sccnxp_port_write(port, SCCNXP_MR_REG, mr1); + sccnxp_port_write(port, SCCNXP_MR_REG, mr2); + + /* Set read status mask */ + port->read_status_mask = SR_OVR; + if (termios->c_iflag & INPCK) + port->read_status_mask |= SR_PE | SR_FE; + if (termios->c_iflag & (BRKINT | PARMRK)) + port->read_status_mask |= SR_BRK; + + /* Set status ignore mask */ + port->ignore_status_mask = 0; + if (termios->c_iflag & IGNBRK) + port->ignore_status_mask |= SR_BRK; + if (!(termios->c_cflag & CREAD)) + port->ignore_status_mask |= SR_PE | SR_OVR | SR_FE | SR_BRK; + + /* Setup baudrate */ + baud = uart_get_baud_rate(port, termios, old, 50, + (s->flags & SCCNXP_HAVE_MR0) ? + 230400 : 38400); + sccnxp_set_baud(port, baud); + + /* Update timeout according to new baud rate */ + uart_update_timeout(port, termios->c_cflag, baud); + + /* Enable RX & TX */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_ENABLE | CR_TX_ENABLE); + + mutex_unlock(&s->sccnxp_mutex); +} + +static int sccnxp_startup(struct uart_port *port) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + + if (s->flags & SCCNXP_HAVE_IO) { + /* Outputs are controlled manually */ + sccnxp_write(port, SCCNXP_OPCR_REG, 0); + } + + /* Reset break condition, status and FIFOs */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_RX_RESET); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_TX_RESET); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_STATUS_RESET); + sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_BREAK_RESET); + + /* Enable RX & TX */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_ENABLE | CR_TX_ENABLE); + + /* Enable RX interrupt */ + sccnxp_enable_irq(port, IMR_RXRDY); + + mutex_unlock(&s->sccnxp_mutex); + + return 0; +} + +static void sccnxp_shutdown(struct uart_port *port) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + mutex_lock(&s->sccnxp_mutex); + + /* Disable interrupts */ + sccnxp_disable_irq(port, IMR_TXRDY | IMR_RXRDY); + + /* Disable TX & RX */ + sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_DISABLE | CR_TX_DISABLE); + + /* Leave direction to input */ + if (s->flags & SCCNXP_HAVE_IO) + sccnxp_set_bit(port, DIR_OP, 0); + + mutex_unlock(&s->sccnxp_mutex); +} + +static const char *sccnxp_type(struct uart_port *port) +{ + struct sccnxp_port *s = dev_get_drvdata(port->dev); + + return (port->type == PORT_SC26XX) ? s->name : NULL; +} + +static void sccnxp_release_port(struct uart_port *port) +{ + /* Do nothing */ +} + +static int sccnxp_request_port(struct uart_port *port) +{ + /* Do nothing */ + return 0; +} + +static void sccnxp_config_port(struct uart_port *port, int flags) +{ + if (flags & UART_CONFIG_TYPE) + port->type = PORT_SC26XX; +} + +static int sccnxp_verify_port(struct uart_port *port, struct serial_struct *s) +{ + if ((s->type == PORT_UNKNOWN) || (s->type == PORT_SC26XX)) + return 0; + if (s->irq == port->irq) + return 0; + + return -EINVAL; +} + +static const struct uart_ops sccnxp_ops = { + .tx_empty = sccnxp_tx_empty, + .set_mctrl = sccnxp_set_mctrl, + .get_mctrl = sccnxp_get_mctrl, + .stop_tx = sccnxp_stop_tx, + .start_tx = sccnxp_start_tx, + .stop_rx = sccnxp_stop_rx, + .enable_ms = sccnxp_enable_ms, + .break_ctl = sccnxp_break_ctl, + .startup = sccnxp_startup, + .shutdown = sccnxp_shutdown, + .set_termios = sccnxp_set_termios, + .type = sccnxp_type, + .release_port = sccnxp_release_port, + .request_port = sccnxp_request_port, + .config_port = sccnxp_config_port, + .verify_port = sccnxp_verify_port, +}; + +#ifdef CONFIG_SERIAL_SCCNXP_CONSOLE +static void sccnxp_console_putchar(struct uart_port *port, int c) +{ + int tryes = 100000; + + while (tryes--) { + if (sccnxp_port_read(port, SCCNXP_SR_REG) & SR_TXRDY) { + sccnxp_port_write(port, SCCNXP_THR_REG, c); + break; + } + barrier(); + } +} + +static void sccnxp_console_write(struct console *co, const char *c, unsigned n) +{ + struct sccnxp_port *s = (struct sccnxp_port *)co->data; + struct uart_port *port = &s->port[co->index]; + + mutex_lock(&s->sccnxp_mutex); + uart_console_write(port, c, n, sccnxp_console_putchar); + mutex_unlock(&s->sccnxp_mutex); +} + +static int sccnxp_console_setup(struct console *co, char *options) +{ + struct sccnxp_port *s = (struct sccnxp_port *)co->data; + struct uart_port *port = &s->port[(co->index > 0) ? co->index : 0]; + int baud = 9600, bits = 8, parity = 'n', flow = 'n'; + + if (options) + uart_parse_options(options, &baud, &parity, &bits, &flow); + + return uart_set_options(port, co, baud, parity, bits, flow); +} +#endif + +static int __devinit sccnxp_probe(struct platform_device *pdev) +{ + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + int chiptype = pdev->id_entry->driver_data; + struct sccnxp_pdata *pdata = dev_get_platdata(&pdev->dev); + int i, ret, fifosize, freq_min, freq_max; + struct sccnxp_port *s; + void __iomem *membase; + + if (!res) { + dev_err(&pdev->dev, "Missing memory resource data\n"); + return -EADDRNOTAVAIL; + } + + dev_set_name(&pdev->dev, SCCNXP_NAME); + + s = devm_kzalloc(&pdev->dev, sizeof(struct sccnxp_port), GFP_KERNEL); + if (!s) { + dev_err(&pdev->dev, "Error allocating port structure\n"); + return -ENOMEM; + } + platform_set_drvdata(pdev, s); + + mutex_init(&s->sccnxp_mutex); + + /* Individual chip settings */ + switch (chiptype) { + case SCCNXP_TYPE_SC2681: + s->name = "SC2681"; + s->uart.nr = 2; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO; + fifosize = 3; + freq_min = 1000000; + freq_max = 4000000; + break; + case SCCNXP_TYPE_SC2691: + s->name = "SC2691"; + s->uart.nr = 1; + s->freq_std = 3686400; + s->addr_mask = 0x07; + s->flags = 0; + fifosize = 3; + freq_min = 1000000; + freq_max = 4000000; + break; + case SCCNXP_TYPE_SC2692: + s->name = "SC2692"; + s->uart.nr = 2; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO; + fifosize = 3; + freq_min = 1000000; + freq_max = 4000000; + break; + case SCCNXP_TYPE_SC2891: + s->name = "SC2891"; + s->uart.nr = 1; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; + fifosize = 16; + freq_min = 100000; + freq_max = 8000000; + break; + case SCCNXP_TYPE_SC2892: + s->name = "SC2892"; + s->uart.nr = 2; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; + fifosize = 16; + freq_min = 100000; + freq_max = 8000000; + break; + case SCCNXP_TYPE_SC28202: + s->name = "SC28202"; + s->uart.nr = 2; + s->freq_std = 14745600; + s->addr_mask = 0x7f; + s->flags = SCCNXP_HAVE_IO | SCCNXP_HAVE_MR0; + fifosize = 256; + freq_min = 1000000; + freq_max = 50000000; + break; + case SCCNXP_TYPE_SC68681: + s->name = "SC68681"; + s->uart.nr = 2; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO; + fifosize = 3; + freq_min = 1000000; + freq_max = 4000000; + break; + case SCCNXP_TYPE_SC68692: + s->name = "SC68692"; + s->uart.nr = 2; + s->freq_std = 3686400; + s->addr_mask = 0x0f; + s->flags = SCCNXP_HAVE_IO; + fifosize = 3; + freq_min = 1000000; + freq_max = 4000000; + break; + default: + dev_err(&pdev->dev, "Unsupported chip type %i\n", chiptype); + ret = -ENOTSUPP; + goto err_out; + } + + if (!pdata) { + dev_warn(&pdev->dev, + "No platform data supplied, using defaults\n"); + s->pdata.frequency = s->freq_std; + } else + memcpy(&s->pdata, pdata, sizeof(struct sccnxp_pdata)); + + s->irq = platform_get_irq(pdev, 0); + if (s->irq <= 0) { + dev_err(&pdev->dev, "Missing irq resource data\n"); + ret = -ENXIO; + goto err_out; + } + + /* Check input frequency */ + if ((s->pdata.frequency < freq_min) || + (s->pdata.frequency > freq_max)) { + dev_err(&pdev->dev, "Frequency out of bounds\n"); + ret = -EINVAL; + goto err_out; + } + + membase = devm_request_and_ioremap(&pdev->dev, res); + if (!membase) { + dev_err(&pdev->dev, "Failed to ioremap\n"); + ret = -EIO; + goto err_out; + } + + s->uart.owner = THIS_MODULE; + s->uart.dev_name = "ttySC"; + s->uart.major = SCCNXP_MAJOR; + s->uart.minor = SCCNXP_MINOR; +#ifdef CONFIG_SERIAL_SCCNXP_CONSOLE + s->uart.cons = &s->console; + s->uart.cons->device = uart_console_device; + s->uart.cons->write = sccnxp_console_write; + s->uart.cons->setup = sccnxp_console_setup; + s->uart.cons->flags = CON_PRINTBUFFER; + s->uart.cons->index = -1; + s->uart.cons->data = s; + strcpy(s->uart.cons->name, "ttySC"); +#endif + ret = uart_register_driver(&s->uart); + if (ret) { + dev_err(&pdev->dev, "Registering UART driver failed\n"); + goto err_out; + } + + for (i = 0; i < s->uart.nr; i++) { + s->port[i].line = i; + s->port[i].dev = &pdev->dev; + s->port[i].irq = s->irq; + s->port[i].type = PORT_SC26XX; + s->port[i].fifosize = fifosize; + s->port[i].flags = UPF_SKIP_TEST | UPF_FIXED_TYPE; + s->port[i].iotype = UPIO_MEM; + s->port[i].mapbase = res->start; + s->port[i].membase = membase; + s->port[i].regshift = s->pdata.reg_shift; + s->port[i].uartclk = s->pdata.frequency; + s->port[i].ops = &sccnxp_ops; + uart_add_one_port(&s->uart, &s->port[i]); + /* Set direction to input */ + if (s->flags & SCCNXP_HAVE_IO) + sccnxp_set_bit(&s->port[i], DIR_OP, 0); + } + + /* Disable interrupts */ + s->imr = 0; + sccnxp_write(&s->port[0], SCCNXP_IMR_REG, 0); + + /* Board specific configure */ + if (s->pdata.init) + s->pdata.init(); + + ret = devm_request_threaded_irq(&pdev->dev, s->irq, NULL, sccnxp_ist, + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, + dev_name(&pdev->dev), s); + if (!ret) + return 0; + + dev_err(&pdev->dev, "Unable to reguest IRQ %i\n", s->irq); + +err_out: + platform_set_drvdata(pdev, NULL); + + return ret; +} + +static int __devexit sccnxp_remove(struct platform_device *pdev) +{ + int i; + struct sccnxp_port *s = platform_get_drvdata(pdev); + + devm_free_irq(&pdev->dev, s->irq, s); + + for (i = 0; i < s->uart.nr; i++) + uart_remove_one_port(&s->uart, &s->port[i]); + + uart_unregister_driver(&s->uart); + platform_set_drvdata(pdev, NULL); + + if (s->pdata.exit) + s->pdata.exit(); + + return 0; +} + +static const struct platform_device_id sccnxp_id_table[] = { + { "sc2681", SCCNXP_TYPE_SC2681 }, + { "sc2691", SCCNXP_TYPE_SC2691 }, + { "sc2692", SCCNXP_TYPE_SC2692 }, + { "sc2891", SCCNXP_TYPE_SC2891 }, + { "sc2892", SCCNXP_TYPE_SC2892 }, + { "sc28202", SCCNXP_TYPE_SC28202 }, + { "sc68681", SCCNXP_TYPE_SC68681 }, + { "sc68692", SCCNXP_TYPE_SC68692 }, +}; +MODULE_DEVICE_TABLE(platform, sccnxp_id_table); + +static struct platform_driver sccnxp_uart_driver = { + .driver = { + .name = SCCNXP_NAME, + .owner = THIS_MODULE, + }, + .probe = sccnxp_probe, + .remove = __devexit_p(sccnxp_remove), + .id_table = sccnxp_id_table, +}; +module_platform_driver(sccnxp_uart_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Alexander Shiyan "); +MODULE_DESCRIPTION("SCCNXP serial driver"); diff --git a/include/linux/platform_data/sccnxp.h b/include/linux/platform_data/sccnxp.h new file mode 100644 index 00000000000..7311ccd3217 --- /dev/null +++ b/include/linux/platform_data/sccnxp.h @@ -0,0 +1,93 @@ +/* + * NXP (Philips) SCC+++(SCN+++) serial driver + * + * Copyright (C) 2012 Alexander Shiyan + * + * Based on sc26xx.c, by Thomas Bogendörfer (tsbogend@alpha.franken.de) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __SCCNXP_H +#define __SCCNXP_H + +#define SCCNXP_MAX_UARTS 2 + +/* Output lines */ +#define LINE_OP0 1 +#define LINE_OP1 2 +#define LINE_OP2 3 +#define LINE_OP3 4 +#define LINE_OP4 5 +#define LINE_OP5 6 +#define LINE_OP6 7 +#define LINE_OP7 8 + +/* Input lines */ +#define LINE_IP0 9 +#define LINE_IP1 10 +#define LINE_IP2 11 +#define LINE_IP3 12 +#define LINE_IP4 13 +#define LINE_IP5 14 +#define LINE_IP6 15 + +/* Signals */ +#define DTR_OP 0 /* DTR */ +#define RTS_OP 4 /* RTS */ +#define DSR_IP 8 /* DSR */ +#define CTS_IP 12 /* CTS */ +#define DCD_IP 16 /* DCD */ +#define RNG_IP 20 /* RNG */ + +#define DIR_OP 24 /* Special signal for control RS-485. + * Goes high when transmit, + * then goes low. + */ + +/* Routing control signal 'sig' to line 'line' */ +#define MCTRL_SIG(sig, line) ((line) << (sig)) + +/* + * Example board initialization data: + * + * static struct resource sc2892_resources[] = { + * DEFINE_RES_MEM(UART_PHYS_START, 0x10), + * DEFINE_RES_IRQ(IRQ_EXT2), + * }; + * + * static struct sccnxp_pdata sc2892_info = { + * .frequency = 3686400, + * .mctrl_cfg[0] = MCTRL_SIG(DIR_OP, LINE_OP0), + * .mctrl_cfg[1] = MCTRL_SIG(DIR_OP, LINE_OP1), + * }; + * + * static struct platform_device sc2892 = { + * .name = "sc2892", + * .id = -1, + * .resource = sc2892_resources, + * .num_resources = ARRAY_SIZE(sc2892_resources), + * .dev = { + * .platform_data = &sc2892_info, + * }, + * }; + */ + +/* SCCNXP platform data structure */ +struct sccnxp_pdata { + /* Frequency (extrenal clock or crystal) */ + int frequency; + /* Shift for A0 line */ + const u8 reg_shift; + /* Modem control lines configuration */ + const u32 mctrl_cfg[SCCNXP_MAX_UARTS]; + /* Called during startup */ + void (*init)(void); + /* Called before finish */ + void (*exit)(void); +}; + +#endif From be282059acebcecd789fad1b3d17d826db3d5608 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Sat, 25 Aug 2012 19:24:20 +0400 Subject: [PATCH 154/235] serial: Add note about migration to driver SCCNXP This patch adds note about migration to driver SCCNXP in the code of driver SC26XX and in MIPS SNI board initialization with example. Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- arch/mips/sni/a20r.c | 32 ++++++++++++++++++++++++++++++++ drivers/tty/serial/sc26xx.c | 3 +++ 2 files changed, 35 insertions(+) diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c index c48194c3073..b2d4f492d78 100644 --- a/arch/mips/sni/a20r.c +++ b/arch/mips/sni/a20r.c @@ -133,6 +133,38 @@ static struct platform_device sc26xx_pdev = { } }; +#warning "Please try migrate to use new driver SCCNXP and report the status" \ + "in the linux-serial mailing list." + +/* The code bellow is a replacement of SC26XX to SCCNXP */ +#if 0 +#include + +static struct sccnxp_pdata sccnxp_data = { + .reg_shift = 2, + .frequency = 3686400, + .mctrl_cfg[0] = MCTRL_SIG(DTR_OP, LINE_OP7) | + MCTRL_SIG(RTS_OP, LINE_OP3) | + MCTRL_SIG(DSR_IP, LINE_IP5) | + MCTRL_SIG(DCD_IP, LINE_IP6), + .mctrl_cfg[1] = MCTRL_SIG(DTR_OP, LINE_OP2) | + MCTRL_SIG(RTS_OP, LINE_OP1) | + MCTRL_SIG(DSR_IP, LINE_IP0) | + MCTRL_SIG(CTS_IP, LINE_IP1) | + MCTRL_SIG(DCD_IP, LINE_IP2) | + MCTRL_SIG(RNG_IP, LINE_IP3), +}; + +static struct platform_device sc2681_pdev = { + .name = "sc2681", + .resource = sc2xxx_rsrc, + .num_resources = ARRAY_SIZE(sc2xxx_rsrc), + .dev = { + .platform_data = &sccnxp_data, + }, +}; +#endif + static u32 a20r_ack_hwint(void) { u32 status = read_c0_status(); diff --git a/drivers/tty/serial/sc26xx.c b/drivers/tty/serial/sc26xx.c index 3992e48b4c7..9d664242b31 100644 --- a/drivers/tty/serial/sc26xx.c +++ b/drivers/tty/serial/sc26xx.c @@ -22,6 +22,9 @@ #include #include +#warning "Please try migrate to use new driver SCCNXP and report the status" \ + "in the linux-serial mailing list." + #if defined(CONFIG_MAGIC_SYSRQ) #define SUPPORT_SYSRQ #endif From c990f3510357586be63bbe9faf7972212a0dc78f Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 23 Aug 2012 13:32:41 +0300 Subject: [PATCH 155/235] serial: omap: define and use to_uart_omap_port() current code only works because struct uart_port is the first member on the uart_omap_port structure. If, for whatever reason, someone puts another member as the first of the structure, that cast won't work anymore. In order to be safe, let's use a container_of() which, for now, gets optimized into a cast anyway. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Acked-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- arch/arm/plat-omap/include/plat/omap-serial.h | 2 ++ drivers/tty/serial/omap-serial.c | 36 +++++++++---------- 2 files changed, 20 insertions(+), 18 deletions(-) diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 52d3de45745..5cc06262071 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -144,4 +144,6 @@ struct uart_omap_port { struct work_struct qos_work; }; +#define to_uart_omap_port(p) ((container_of((p), struct uart_omap_port, port))) + #endif /* __OMAP_SERIAL_H__ */ diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index aa603f221c6..8d7a18ab045 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -142,7 +142,7 @@ static void serial_omap_stop_rxdma(struct uart_omap_port *up) static void serial_omap_enable_ms(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); dev_dbg(up->port.dev, "serial_omap_enable_ms+%d\n", up->port.line); @@ -154,7 +154,7 @@ static void serial_omap_enable_ms(struct uart_port *port) static void serial_omap_stop_tx(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; if (up->use_dma && @@ -187,7 +187,7 @@ static void serial_omap_stop_tx(struct uart_port *port) static void serial_omap_stop_rx(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); pm_runtime_get_sync(&up->pdev->dev); if (up->use_dma) @@ -308,7 +308,7 @@ static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up) static void serial_omap_start_tx(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; struct circ_buf *xmit; unsigned int start; @@ -450,7 +450,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) static unsigned int serial_omap_tx_empty(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned long flags = 0; unsigned int ret = 0; @@ -465,7 +465,7 @@ static unsigned int serial_omap_tx_empty(struct uart_port *port) static unsigned int serial_omap_get_mctrl(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned int status; unsigned int ret = 0; @@ -488,7 +488,7 @@ static unsigned int serial_omap_get_mctrl(struct uart_port *port) static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned char mcr = 0; dev_dbg(up->port.dev, "serial_omap_set_mctrl+%d\n", up->port.line); @@ -522,7 +522,7 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) static void serial_omap_break_ctl(struct uart_port *port, int break_state) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned long flags = 0; dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->port.line); @@ -539,7 +539,7 @@ static void serial_omap_break_ctl(struct uart_port *port, int break_state) static int serial_omap_startup(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned long flags = 0; int retval; @@ -617,7 +617,7 @@ static int serial_omap_startup(struct uart_port *port) static void serial_omap_shutdown(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned long flags = 0; dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->port.line); @@ -735,7 +735,7 @@ static void serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, struct ktermios *old) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned char cval = 0; unsigned char efr = 0; unsigned long flags = 0; @@ -946,7 +946,7 @@ static void serial_omap_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned char efr; dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->port.line); @@ -985,7 +985,7 @@ static int serial_omap_request_port(struct uart_port *port) static void serial_omap_config_port(struct uart_port *port, int flags) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); dev_dbg(up->port.dev, "serial_omap_config_port+%d\n", up->port.line); @@ -1003,7 +1003,7 @@ serial_omap_verify_port(struct uart_port *port, struct serial_struct *ser) static const char * serial_omap_type(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); dev_dbg(up->port.dev, "serial_omap_type+%d\n", up->port.line); return up->name; @@ -1046,7 +1046,7 @@ static inline void wait_for_xmitr(struct uart_omap_port *up) static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); pm_runtime_get_sync(&up->pdev->dev); wait_for_xmitr(up); @@ -1056,7 +1056,7 @@ static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) static int serial_omap_poll_get_char(struct uart_port *port) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); unsigned int status; pm_runtime_get_sync(&up->pdev->dev); @@ -1079,7 +1079,7 @@ static struct uart_driver serial_omap_reg; static void serial_omap_console_putchar(struct uart_port *port, int ch) { - struct uart_omap_port *up = (struct uart_omap_port *)port; + struct uart_omap_port *up = to_uart_omap_port(port); wait_for_xmitr(up); serial_out(up, UART_TX, ch); @@ -1355,7 +1355,7 @@ static void serial_omap_continue_tx(struct uart_omap_port *up) static void uart_tx_dma_callback(int lch, u16 ch_status, void *data) { - struct uart_omap_port *up = (struct uart_omap_port *)data; + struct uart_omap_port *up = data; struct circ_buf *xmit = &up->port.state->xmit; xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & \ From e5b57c037a656c694c7f3674f96352297a6ee7d8 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 23 Aug 2012 13:32:42 +0300 Subject: [PATCH 156/235] serial: omap: define helpers for pdata function pointers this patch is in preparation to a few other changes which will align on the prototype for function pointers passed through pdata. It also helps cleaning up the driver a little by agregating checks for pdata in a single location. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 66 +++++++++++++++++++++++--------- 1 file changed, 47 insertions(+), 19 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 8d7a18ab045..3a60b86ab0f 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -102,6 +102,40 @@ static inline void serial_omap_clear_fifos(struct uart_omap_port *up) serial_out(up, UART_FCR, 0); } +static int serial_omap_get_context_loss_count(struct uart_omap_port *up) +{ + struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + + if (!pdata->get_context_loss_count) + return 0; + + return pdata->get_context_loss_count(&up->pdev->dev); +} + +static void serial_omap_set_forceidle(struct uart_omap_port *up) +{ + struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + + if (pdata->set_forceidle) + pdata->set_forceidle(up->pdev); +} + +static void serial_omap_set_noidle(struct uart_omap_port *up) +{ + struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + + if (pdata->set_noidle) + pdata->set_noidle(up->pdev); +} + +static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable) +{ + struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + + if (pdata->enable_wakeup) + pdata->enable_wakeup(up->pdev, enable); +} + /* * serial_omap_get_divisor - calculate divisor value * @port: uart port info @@ -178,8 +212,8 @@ static void serial_omap_stop_tx(struct uart_port *port) serial_out(up, UART_IER, up->ier); } - if (!up->use_dma && pdata && pdata->set_forceidle) - pdata->set_forceidle(up->pdev); + if (!up->use_dma && pdata) + serial_omap_set_forceidle(up); pm_runtime_mark_last_busy(&up->pdev->dev); pm_runtime_put_autosuspend(&up->pdev->dev); @@ -309,7 +343,6 @@ static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up) static void serial_omap_start_tx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; struct circ_buf *xmit; unsigned int start; int ret = 0; @@ -317,8 +350,7 @@ static void serial_omap_start_tx(struct uart_port *port) if (!up->use_dma) { pm_runtime_get_sync(&up->pdev->dev); serial_omap_enable_ier_thri(up); - if (pdata && pdata->set_noidle) - pdata->set_noidle(up->pdev); + serial_omap_set_noidle(up); pm_runtime_mark_last_busy(&up->pdev->dev); pm_runtime_put_autosuspend(&up->pdev->dev); return; @@ -1681,28 +1713,26 @@ static int serial_omap_runtime_suspend(struct device *dev) if (!up) return -EINVAL; - if (!pdata || !pdata->enable_wakeup) + if (!pdata) return 0; - if (pdata->get_context_loss_count) - up->context_loss_cnt = pdata->get_context_loss_count(dev); + up->context_loss_cnt = serial_omap_get_context_loss_count(up); if (device_may_wakeup(dev)) { if (!up->wakeups_enabled) { - pdata->enable_wakeup(up->pdev, true); + serial_omap_enable_wakeup(up, true); up->wakeups_enabled = true; } } else { if (up->wakeups_enabled) { - pdata->enable_wakeup(up->pdev, false); + serial_omap_enable_wakeup(up, false); up->wakeups_enabled = false; } } /* Errata i291 */ - if (up->use_dma && pdata->set_forceidle && - (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE)) - pdata->set_forceidle(up->pdev); + if (up->use_dma && (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE)) + serial_omap_set_forceidle(up); up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE; schedule_work(&up->qos_work); @@ -1716,17 +1746,15 @@ static int serial_omap_runtime_resume(struct device *dev) struct omap_uart_port_info *pdata = dev->platform_data; if (up && pdata) { - if (pdata->get_context_loss_count) { - u32 loss_cnt = pdata->get_context_loss_count(dev); + u32 loss_cnt = serial_omap_get_context_loss_count(up); if (up->context_loss_cnt != loss_cnt) serial_omap_restore_context(up); - } /* Errata i291 */ - if (up->use_dma && pdata->set_noidle && - (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE)) - pdata->set_noidle(up->pdev); + if ((up->errata & UART_ERRATA_i291_DMA_FORCEIDLE) && + up->use_dma) + serial_omap_set_noidle(up); up->latency = up->calc_latency; schedule_work(&up->qos_work); From f21ec3d2d46e5f2ffc06f31fe2704fdcea7a58f3 Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Wed, 22 Aug 2012 22:13:36 -0400 Subject: [PATCH 157/235] serial: add a new helper function In most of the time, the driver needs to check if the cts flow control is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually, which is not a grace way. So add a new wraper function to make the code tidy and clean. Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- drivers/char/pcmcia/synclink_cs.c | 2 +- drivers/tty/amiserial.c | 2 +- drivers/tty/cyclades.c | 2 +- drivers/tty/isicom.c | 2 +- drivers/tty/mxser.c | 2 +- drivers/tty/serial/mxs-auart.c | 2 +- drivers/tty/serial/serial_core.c | 4 ++-- drivers/tty/synclink.c | 2 +- drivers/tty/synclink_gt.c | 2 +- drivers/tty/synclinkmp.c | 2 +- include/linux/tty.h | 6 ++++++ net/irda/ircomm/ircomm_tty.c | 4 ++-- net/irda/ircomm/ircomm_tty_attach.c | 2 +- 13 files changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/char/pcmcia/synclink_cs.c b/drivers/char/pcmcia/synclink_cs.c index 5db08c78beb..3f57d5de395 100644 --- a/drivers/char/pcmcia/synclink_cs.c +++ b/drivers/char/pcmcia/synclink_cs.c @@ -1050,7 +1050,7 @@ static void cts_change(MGSLPC_INFO *info, struct tty_struct *tty) wake_up_interruptible(&info->status_event_wait_q); wake_up_interruptible(&info->event_wait_q); - if (info->port.flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(&info->port)) { if (tty->hw_stopped) { if (info->serial_signals & SerialSignal_CTS) { if (debug_level >= DEBUG_LEVEL_ISR) diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c index 2b7535d42e0..42d0a2581a8 100644 --- a/drivers/tty/amiserial.c +++ b/drivers/tty/amiserial.c @@ -420,7 +420,7 @@ static void check_modem_status(struct serial_state *info) tty_hangup(port->tty); } } - if (port->flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(port)) { if (port->tty->hw_stopped) { if (!(status & SER_CTS)) { #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW)) diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c index e3954dae506..0a6a0bc1b59 100644 --- a/drivers/tty/cyclades.c +++ b/drivers/tty/cyclades.c @@ -727,7 +727,7 @@ static void cyy_chip_modem(struct cyclades_card *cinfo, int chip, else tty_hangup(tty); } - if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) { + if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) { if (tty->hw_stopped) { if (mdm_status & CyCTS) { /* cy_start isn't used diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c index 99cf22e5f2b..d7492e18360 100644 --- a/drivers/tty/isicom.c +++ b/drivers/tty/isicom.c @@ -600,7 +600,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id) port->status &= ~ISI_DCD; } - if (port->port.flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(&port->port)) { if (tty->hw_stopped) { if (header & ISI_CTS) { port->port.tty->hw_stopped = 0; diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c index bb2da4ca825..cfda47dabd2 100644 --- a/drivers/tty/mxser.c +++ b/drivers/tty/mxser.c @@ -830,7 +830,7 @@ static void mxser_check_modem_status(struct tty_struct *tty, wake_up_interruptible(&port->port.open_wait); } - if (port->port.flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(&port->port)) { if (tty->hw_stopped) { if (status & UART_MSR_CTS) { tty->hw_stopped = 0; diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 3a667eed63d..dafeef2bfb4 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -262,7 +262,7 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl) ctrl &= ~AUART_CTRL2_RTSEN; if (mctrl & TIOCM_RTS) { - if (u->state->port.flags & ASYNC_CTS_FLOW) + if (tty_port_cts_enabled(&u->state->port)) ctrl |= AUART_CTRL2_RTSEN; } diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index bb5f2360383..137b25ce39a 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -176,7 +176,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state, uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR); } - if (port->flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(port)) { spin_lock_irq(&uport->lock); if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS)) tty->hw_stopped = 1; @@ -2509,7 +2509,7 @@ void uart_handle_cts_change(struct uart_port *uport, unsigned int status) uport->icount.cts++; - if (port->flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(port)) { if (tty->hw_stopped) { if (status) { tty->hw_stopped = 0; diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c index 666aa1455fc..70e3a525bc8 100644 --- a/drivers/tty/synclink.c +++ b/drivers/tty/synclink.c @@ -1359,7 +1359,7 @@ static void mgsl_isr_io_pin( struct mgsl_struct *info ) } } - if ( (info->port.flags & ASYNC_CTS_FLOW) && + if (tty_port_cts_enabled(&info->port) && (status & MISCSTATUS_CTS_LATCHED) ) { if (info->port.tty->hw_stopped) { if (status & MISCSTATUS_CTS) { diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c index 45f6136f4e5..b38e954eedd 100644 --- a/drivers/tty/synclink_gt.c +++ b/drivers/tty/synclink_gt.c @@ -2053,7 +2053,7 @@ static void cts_change(struct slgt_info *info, unsigned short status) wake_up_interruptible(&info->event_wait_q); info->pending_bh |= BH_STATUS; - if (info->port.flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(&info->port)) { if (info->port.tty) { if (info->port.tty->hw_stopped) { if (info->signals & SerialSignal_CTS) { diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c index 53429c890a8..f17d9f3d84a 100644 --- a/drivers/tty/synclinkmp.c +++ b/drivers/tty/synclinkmp.c @@ -2500,7 +2500,7 @@ static void isr_io_pin( SLMP_INFO *info, u16 status ) } } - if ( (info->port.flags & ASYNC_CTS_FLOW) && + if (tty_port_cts_enabled(&info->port) && (status & MISCSTATUS_CTS_LATCHED) ) { if ( info->port.tty ) { if (info->port.tty->hw_stopped) { diff --git a/include/linux/tty.h b/include/linux/tty.h index dbebd1e56bc..9892121354c 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -514,6 +514,12 @@ static inline struct tty_port *tty_port_get(struct tty_port *port) return port; } +/* If the cts flow control is enabled, return true. */ +static inline bool tty_port_cts_enabled(struct tty_port *port) +{ + return port->flags & ASYNC_CTS_FLOW; +} + extern struct tty_struct *tty_port_tty_get(struct tty_port *port); extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty); extern int tty_port_carrier_raised(struct tty_port *port); diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c index 96689906b93..95a3a7a336b 100644 --- a/net/irda/ircomm/ircomm_tty.c +++ b/net/irda/ircomm/ircomm_tty.c @@ -1070,7 +1070,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self) goto put; } } - if (tty && self->port.flags & ASYNC_CTS_FLOW) { + if (tty && tty_port_cts_enabled(&self->port)) { if (tty->hw_stopped) { if (status & IRCOMM_CTS) { IRDA_DEBUG(2, @@ -1313,7 +1313,7 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m) seq_puts(m, "Flags:"); sep = ' '; - if (self->port.flags & ASYNC_CTS_FLOW) { + if (tty_port_cts_enabled(&self->port)) { seq_printf(m, "%cASYNC_CTS_FLOW", sep); sep = '|'; } diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c index 3ab70e7a071..edab393e0c8 100644 --- a/net/irda/ircomm/ircomm_tty_attach.c +++ b/net/irda/ircomm/ircomm_tty_attach.c @@ -578,7 +578,7 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self) * will have to wait for the peer device (DCE) to raise the CTS * line. */ - if ((self->port.flags & ASYNC_CTS_FLOW) && + if (tty_port_cts_enabled(&self->port) && ((self->settings.dce & IRCOMM_CTS) == 0)) { IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ ); goto put; From 9986ffd9032a103df54fa4ed85f8f83f6b215194 Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Mon, 3 Sep 2012 18:09:53 +0800 Subject: [PATCH 158/235] parport: fix possible memory leak in parport_gsc_probe_port() ops has been allocated in this function and should be freed before leaving from the error handling cases. spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/parport/parport_gsc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/parport/parport_gsc.c b/drivers/parport/parport_gsc.c index 5d6de380e42..352f96180bc 100644 --- a/drivers/parport/parport_gsc.c +++ b/drivers/parport/parport_gsc.c @@ -271,6 +271,7 @@ struct parport *__devinit parport_gsc_probe_port (unsigned long base, if (!parport_SPP_supported (p)) { /* No port. */ kfree (priv); + kfree(ops); return NULL; } parport_PS2_supported (p); From 27788c5fe6af98c34950326b62778da15e30eb55 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Tue, 4 Sep 2012 16:21:06 +0100 Subject: [PATCH 159/235] 8250_pci: Add additional WCH CHC353 devices These were reported in bugzilla long ago with a hack patch. Now we have a proper patch for one we can do the rest. Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=25102 Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 41 +++++++++++++++++++++++++++--- 1 file changed, 37 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index 803d313e061..fdab80a4e06 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1204,6 +1204,10 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCIE_DEVICE_ID_NEO_2_OX_IBM 0x00F6 #define PCI_DEVICE_ID_PLX_CRONYX_OMEGA 0xc001 #define PCI_DEVICE_ID_INTEL_PATSBURG_KT 0x1d3d +#define PCI_VENDOR_ID_WCH 0x4348 +#define PCI_DEVICE_ID_WCH_CH353_4S 0x3453 +#define PCI_DEVICE_ID_WCH_CH353_2S1PF 0x5046 +#define PCI_DEVICE_ID_WCH_CH353_2S1P 0x7053 #define PCI_VENDOR_ID_AGESTAR 0x5372 #define PCI_DEVICE_ID_AGESTAR_9375 0x6872 #define PCI_VENDOR_ID_ASIX 0x9710 @@ -1749,10 +1753,26 @@ static struct pci_serial_quirk pci_serial_quirks[] __refdata = { }, /* WCH CH353 2S1P card (16550 clone) */ { - .vendor = 0x4348, - .device = 0x7053, - .subvendor = 0x4348, - .subdevice = 0x3253, + .vendor = PCI_VENDOR_ID_WCH, + .device = PCI_DEVICE_ID_WCH_CH353_2S1P, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_wch_ch353_setup, + }, + /* WCH CH353 4S card (16550 clone) */ + { + .vendor = PCI_VENDOR_ID_WCH, + .device = PCI_DEVICE_ID_WCH_CH353_4S, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, + .setup = pci_wch_ch353_setup, + }, + /* WCH CH353 2S1PF card (16550 clone) */ + { + .vendor = PCI_VENDOR_ID_WCH, + .device = PCI_DEVICE_ID_WCH_CH353_2S1PF, + .subvendor = PCI_ANY_ID, + .subdevice = PCI_ANY_ID, .setup = pci_wch_ch353_setup, }, /* @@ -4218,6 +4238,19 @@ static struct pci_device_id serial_pci_tbl[] = { { PCI_VENDOR_ID_AGESTAR, PCI_DEVICE_ID_AGESTAR_9375, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_bt_2_115200 }, + + /* + * WCH CH353 series devices: The 2S1P is handled by parport_serial + * so not listed here. + */ + { PCI_VENDOR_ID_WCH, PCI_DEVICE_ID_WCH_CH353_4S, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, pbn_b0_bt_4_115200 }, + + { PCI_VENDOR_ID_WCH, PCI_DEVICE_ID_WCH_CH353_2S1PF, + PCI_ANY_ID, PCI_ANY_ID, + 0, 0, pbn_b0_bt_2_115200 }, + /* * These entries match devices with class COMMUNICATION_SERIAL, * COMMUNICATION_MODEM or COMMUNICATION_MULTISERIAL From d8ee4ea68ff9c0f13646070aeada668a4eae9189 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:20 +0300 Subject: [PATCH 160/235] serial: omap: don't access the platform_device The driver doesn't need to know about its platform_device. Everything the driver needs can be done through the struct device pointer. In case we need to use the OMAP-specific PM function pointers, those can make sure to find the device's platform_device pointer so they can find the struct omap_device through pdev->archdata field. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-omap2/serial.c | 15 ++- arch/arm/plat-omap/include/plat/omap-serial.h | 10 +- drivers/tty/serial/omap-serial.c | 124 +++++++++--------- 3 files changed, 76 insertions(+), 73 deletions(-) diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c index 25d53b2800c..9e80d209d13 100644 --- a/arch/arm/mach-omap2/serial.c +++ b/arch/arm/mach-omap2/serial.c @@ -81,8 +81,9 @@ static struct omap_uart_port_info omap_serial_default_info[] __initdata = { }; #ifdef CONFIG_PM -static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) +static void omap_uart_enable_wakeup(struct device *dev, bool enable) { + struct platform_device *pdev = to_platform_device(dev); struct omap_device *od = to_omap_device(pdev); if (!od) @@ -99,15 +100,17 @@ static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) * in Smartidle Mode When Configured for DMA Operations. * WA: configure uart in force idle mode. */ -static void omap_uart_set_noidle(struct platform_device *pdev) +static void omap_uart_set_noidle(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); struct omap_device *od = to_omap_device(pdev); omap_hwmod_set_slave_idlemode(od->hwmods[0], HWMOD_IDLEMODE_NO); } -static void omap_uart_set_smartidle(struct platform_device *pdev) +static void omap_uart_set_smartidle(struct device *dev) { + struct platform_device *pdev = to_platform_device(dev); struct omap_device *od = to_omap_device(pdev); u8 idlemode; @@ -120,10 +123,10 @@ static void omap_uart_set_smartidle(struct platform_device *pdev) } #else -static void omap_uart_enable_wakeup(struct platform_device *pdev, bool enable) +static void omap_uart_enable_wakeup(struct device *dev, bool enable) {} -static void omap_uart_set_noidle(struct platform_device *pdev) {} -static void omap_uart_set_smartidle(struct platform_device *pdev) {} +static void omap_uart_set_noidle(struct device *dev) {} +static void omap_uart_set_smartidle(struct device *dev) {} #endif /* CONFIG_PM */ #ifdef CONFIG_OMAP_MUX diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 5cc06262071..90d2d74d168 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -18,7 +18,7 @@ #define __OMAP_SERIAL_H__ #include -#include +#include #include #include @@ -74,9 +74,9 @@ struct omap_uart_port_info { int DTR_present; int (*get_context_loss_count)(struct device *); - void (*set_forceidle)(struct platform_device *); - void (*set_noidle)(struct platform_device *); - void (*enable_wakeup)(struct platform_device *, bool); + void (*set_forceidle)(struct device *); + void (*set_noidle)(struct device *); + void (*enable_wakeup)(struct device *, bool); }; struct uart_omap_dma { @@ -108,7 +108,7 @@ struct uart_omap_dma { struct uart_omap_port { struct uart_port port; struct uart_omap_dma uart_dma; - struct platform_device *pdev; + struct device *dev; unsigned char ier; unsigned char lcr; diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 3a60b86ab0f..5af5d228f7d 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -104,36 +104,36 @@ static inline void serial_omap_clear_fifos(struct uart_omap_port *up) static int serial_omap_get_context_loss_count(struct uart_omap_port *up) { - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + struct omap_uart_port_info *pdata = up->dev->platform_data; if (!pdata->get_context_loss_count) return 0; - return pdata->get_context_loss_count(&up->pdev->dev); + return pdata->get_context_loss_count(up->dev); } static void serial_omap_set_forceidle(struct uart_omap_port *up) { - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + struct omap_uart_port_info *pdata = up->dev->platform_data; if (pdata->set_forceidle) - pdata->set_forceidle(up->pdev); + pdata->set_forceidle(up->dev); } static void serial_omap_set_noidle(struct uart_omap_port *up) { - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + struct omap_uart_port_info *pdata = up->dev->platform_data; if (pdata->set_noidle) - pdata->set_noidle(up->pdev); + pdata->set_noidle(up->dev); } static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable) { - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + struct omap_uart_port_info *pdata = up->dev->platform_data; if (pdata->enable_wakeup) - pdata->enable_wakeup(up->pdev, enable); + pdata->enable_wakeup(up->dev, enable); } /* @@ -169,8 +169,8 @@ static void serial_omap_stop_rxdma(struct uart_omap_port *up) omap_free_dma(up->uart_dma.rx_dma_channel); up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE; up->uart_dma.rx_dma_used = false; - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } } @@ -180,16 +180,16 @@ static void serial_omap_enable_ms(struct uart_port *port) dev_dbg(up->port.dev, "serial_omap_enable_ms+%d\n", up->port.line); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); } static void serial_omap_stop_tx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); - struct omap_uart_port_info *pdata = up->pdev->dev.platform_data; + struct omap_uart_port_info *pdata = up->dev->platform_data; if (up->use_dma && up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) { @@ -202,11 +202,11 @@ static void serial_omap_stop_tx(struct uart_port *port) omap_stop_dma(up->uart_dma.tx_dma_channel); omap_free_dma(up->uart_dma.tx_dma_channel); up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); if (up->ier & UART_IER_THRI) { up->ier &= ~UART_IER_THRI; serial_out(up, UART_IER, up->ier); @@ -215,22 +215,22 @@ static void serial_omap_stop_tx(struct uart_port *port) if (!up->use_dma && pdata) serial_omap_set_forceidle(up); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static void serial_omap_stop_rx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); if (up->use_dma) serial_omap_stop_rxdma(up); up->ier &= ~UART_IER_RLSI; up->port.read_status_mask &= ~UART_LSR_DR; serial_out(up, UART_IER, up->ier); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static inline void receive_chars(struct uart_omap_port *up, @@ -348,11 +348,11 @@ static void serial_omap_start_tx(struct uart_port *port) int ret = 0; if (!up->use_dma) { - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); serial_omap_enable_ier_thri(up); serial_omap_set_noidle(up); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); return; } @@ -362,7 +362,7 @@ static void serial_omap_start_tx(struct uart_port *port) xmit = &up->port.state->xmit; if (up->uart_dma.tx_dma_channel == OMAP_UART_DMA_CH_FREE) { - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); ret = omap_request_dma(up->uart_dma.uart_dma_tx, "UART Tx DMA", (void *)uart_tx_dma_callback, up, @@ -445,11 +445,11 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) unsigned int iir, lsr; unsigned long flags; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); iir = serial_in(up, UART_IIR); if (iir & UART_IIR_NO_INT) { - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); return IRQ_NONE; } @@ -473,8 +473,8 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) transmit_chars(up); spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); up->port_activity = jiffies; return IRQ_HANDLED; @@ -486,12 +486,12 @@ static unsigned int serial_omap_tx_empty(struct uart_port *port) unsigned long flags = 0; unsigned int ret = 0; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); dev_dbg(up->port.dev, "serial_omap_tx_empty+%d\n", up->port.line); spin_lock_irqsave(&up->port.lock, flags); ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); return ret; } @@ -501,9 +501,9 @@ static unsigned int serial_omap_get_mctrl(struct uart_port *port) unsigned int status; unsigned int ret = 0; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); status = check_modem_status(up); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); dev_dbg(up->port.dev, "serial_omap_get_mctrl+%d\n", up->port.line); @@ -535,11 +535,11 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) if (mctrl & TIOCM_LOOP) mcr |= UART_MCR_LOOP; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); up->mcr = serial_in(up, UART_MCR); up->mcr |= mcr; serial_out(up, UART_MCR, up->mcr); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); if (gpio_is_valid(up->DTR_gpio) && !!(mctrl & TIOCM_DTR) != up->DTR_active) { @@ -558,7 +558,7 @@ static void serial_omap_break_ctl(struct uart_port *port, int break_state) unsigned long flags = 0; dev_dbg(up->port.dev, "serial_omap_break_ctl+%d\n", up->port.line); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); spin_lock_irqsave(&up->port.lock, flags); if (break_state == -1) up->lcr |= UART_LCR_SBC; @@ -566,7 +566,7 @@ static void serial_omap_break_ctl(struct uart_port *port, int break_state) up->lcr &= ~UART_LCR_SBC; serial_out(up, UART_LCR, up->lcr); spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); } static int serial_omap_startup(struct uart_port *port) @@ -585,7 +585,7 @@ static int serial_omap_startup(struct uart_port *port) dev_dbg(up->port.dev, "serial_omap_startup+%d\n", up->port.line); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); /* * Clear the FIFO buffers and disable them. * (they will be reenabled in set_termios()) @@ -641,8 +641,8 @@ static int serial_omap_startup(struct uart_port *port) /* Enable module level wake up */ serial_out(up, UART_OMAP_WER, OMAP_UART_WER_MOD_WKUP); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); up->port_activity = jiffies; return 0; } @@ -654,7 +654,7 @@ static void serial_omap_shutdown(struct uart_port *port) dev_dbg(up->port.dev, "serial_omap_shutdown+%d\n", up->port.line); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); /* * Disable interrupts from this port */ @@ -689,7 +689,7 @@ static void serial_omap_shutdown(struct uart_port *port) up->uart_dma.rx_buf = NULL; } - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); free_irq(up->port.irq, up); } @@ -821,7 +821,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, * Ok, we're now changing the port state. Do it with * interrupts disabled. */ - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); spin_lock_irqsave(&up->port.lock, flags); /* @@ -970,7 +970,7 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, serial_omap_configure_xonxoff(up, termios); spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); } @@ -983,7 +983,7 @@ serial_omap_pm(struct uart_port *port, unsigned int state, dev_dbg(up->port.dev, "serial_omap_pm+%d\n", up->port.line); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); efr = serial_in(up, UART_EFR); serial_out(up, UART_EFR, efr | UART_EFR_ECB); @@ -994,14 +994,14 @@ serial_omap_pm(struct uart_port *port, unsigned int state, serial_out(up, UART_EFR, efr); serial_out(up, UART_LCR, 0); - if (!device_may_wakeup(&up->pdev->dev)) { + if (!device_may_wakeup(up->dev)) { if (!state) - pm_runtime_forbid(&up->pdev->dev); + pm_runtime_forbid(up->dev); else - pm_runtime_allow(&up->pdev->dev); + pm_runtime_allow(up->dev); } - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); } static void serial_omap_release_port(struct uart_port *port) @@ -1080,10 +1080,10 @@ static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) { struct uart_omap_port *up = to_uart_omap_port(port); - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); wait_for_xmitr(up); serial_out(up, UART_TX, ch); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); } static int serial_omap_poll_get_char(struct uart_port *port) @@ -1091,13 +1091,13 @@ static int serial_omap_poll_get_char(struct uart_port *port) struct uart_omap_port *up = to_uart_omap_port(port); unsigned int status; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); status = serial_in(up, UART_LSR); if (!(status & UART_LSR_DR)) return NO_POLL_CHAR; status = serial_in(up, UART_RX); - pm_runtime_put(&up->pdev->dev); + pm_runtime_put(up->dev); return status; } @@ -1126,7 +1126,7 @@ serial_omap_console_write(struct console *co, const char *s, unsigned int ier; int locked = 1; - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); local_irq_save(flags); if (up->port.sysrq) @@ -1160,8 +1160,8 @@ serial_omap_console_write(struct console *co, const char *s, if (up->msr_saved_flags) check_modem_status(up); - pm_runtime_mark_last_busy(&up->pdev->dev); - pm_runtime_put_autosuspend(&up->pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); if (locked) spin_unlock(&up->port.lock); local_irq_restore(flags); @@ -1323,7 +1323,7 @@ static int serial_omap_start_rxdma(struct uart_omap_port *up) int ret = 0; if (up->uart_dma.rx_dma_channel == -1) { - pm_runtime_get_sync(&up->pdev->dev); + pm_runtime_get_sync(up->dev); ret = omap_request_dma(up->uart_dma.uart_dma_rx, "UART Rx DMA", (void *)uart_rx_dma_callback, up, @@ -1435,7 +1435,7 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) minor = (mvr & OMAP_UART_MVR_MIN_MASK); break; default: - dev_warn(&up->pdev->dev, + dev_warn(up->dev, "Unknown %s revision, defaulting to highest\n", up->name); /* highest possible revision */ @@ -1535,7 +1535,7 @@ static int serial_omap_probe(struct platform_device *pdev) up->DTR_gpio = -EINVAL; up->DTR_active = 0; - up->pdev = pdev; + up->dev = &pdev->dev; up->port.dev = &pdev->dev; up->port.type = PORT_OMAP; up->port.iotype = UPIO_MEM; @@ -1632,7 +1632,7 @@ static int serial_omap_remove(struct platform_device *dev) struct uart_omap_port *up = platform_get_drvdata(dev); if (up) { - pm_runtime_disable(&up->pdev->dev); + pm_runtime_disable(up->dev); uart_remove_one_port(&serial_omap_reg, &up->port); pm_qos_remove_request(&up->pm_qos_request); } @@ -1667,7 +1667,7 @@ static void serial_omap_mdr1_errataset(struct uart_omap_port *up, u8 mdr1) timeout--; if (!timeout) { /* Should *never* happen. we warn and carry on */ - dev_crit(&up->pdev->dev, "Errata i202: timedout %x\n", + dev_crit(up->dev, "Errata i202: timedout %x\n", serial_in(up, UART_LSR)); break; } From 494574304711a333386e7dd5fd3ebbc3b7024994 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:21 +0300 Subject: [PATCH 161/235] serial: omap: drop DMA support The current support is known to be broken and a later patch will come re-adding it using dma engine API. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 330 ++----------------------------- 1 file changed, 12 insertions(+), 318 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 5af5d228f7d..dd3971fe899 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -33,7 +33,6 @@ #include #include #include -#include #include #include #include @@ -41,7 +40,6 @@ #include #include -#include #include #include @@ -75,9 +73,6 @@ static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS]; /* Forward declaration of functions */ -static void uart_tx_dma_callback(int lch, u16 ch_status, void *data); -static void serial_omap_rxdma_poll(unsigned long uart_no); -static int serial_omap_start_rxdma(struct uart_omap_port *up); static void serial_omap_mdr1_errataset(struct uart_omap_port *up, u8 mdr1); static struct workqueue_struct *serial_omap_uart_wq; @@ -161,19 +156,6 @@ serial_omap_get_divisor(struct uart_port *port, unsigned int baud) return port->uartclk/(baud * divisor); } -static void serial_omap_stop_rxdma(struct uart_omap_port *up) -{ - if (up->uart_dma.rx_dma_used) { - del_timer(&up->uart_dma.rx_timer); - omap_stop_dma(up->uart_dma.rx_dma_channel); - omap_free_dma(up->uart_dma.rx_dma_channel); - up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE; - up->uart_dma.rx_dma_used = false; - pm_runtime_mark_last_busy(up->dev); - pm_runtime_put_autosuspend(up->dev); - } -} - static void serial_omap_enable_ms(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); @@ -189,22 +171,6 @@ static void serial_omap_enable_ms(struct uart_port *port) static void serial_omap_stop_tx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); - struct omap_uart_port_info *pdata = up->dev->platform_data; - - if (up->use_dma && - up->uart_dma.tx_dma_channel != OMAP_UART_DMA_CH_FREE) { - /* - * Check if dma is still active. If yes do nothing, - * return. Else stop dma - */ - if (omap_get_dma_active_status(up->uart_dma.tx_dma_channel)) - return; - omap_stop_dma(up->uart_dma.tx_dma_channel); - omap_free_dma(up->uart_dma.tx_dma_channel); - up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; - pm_runtime_mark_last_busy(up->dev); - pm_runtime_put_autosuspend(up->dev); - } pm_runtime_get_sync(up->dev); if (up->ier & UART_IER_THRI) { @@ -212,8 +178,7 @@ static void serial_omap_stop_tx(struct uart_port *port) serial_out(up, UART_IER, up->ier); } - if (!up->use_dma && pdata) - serial_omap_set_forceidle(up); + serial_omap_set_forceidle(up); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); @@ -224,8 +189,6 @@ static void serial_omap_stop_rx(struct uart_port *port) struct uart_omap_port *up = to_uart_omap_port(port); pm_runtime_get_sync(up->dev); - if (up->use_dma) - serial_omap_stop_rxdma(up); up->ier &= ~UART_IER_RLSI; up->port.read_status_mask &= ~UART_LSR_DR; serial_out(up, UART_IER, up->ier); @@ -343,67 +306,12 @@ static inline void serial_omap_enable_ier_thri(struct uart_omap_port *up) static void serial_omap_start_tx(struct uart_port *port) { struct uart_omap_port *up = to_uart_omap_port(port); - struct circ_buf *xmit; - unsigned int start; - int ret = 0; - if (!up->use_dma) { - pm_runtime_get_sync(up->dev); - serial_omap_enable_ier_thri(up); - serial_omap_set_noidle(up); - pm_runtime_mark_last_busy(up->dev); - pm_runtime_put_autosuspend(up->dev); - return; - } - - if (up->uart_dma.tx_dma_used) - return; - - xmit = &up->port.state->xmit; - - if (up->uart_dma.tx_dma_channel == OMAP_UART_DMA_CH_FREE) { - pm_runtime_get_sync(up->dev); - ret = omap_request_dma(up->uart_dma.uart_dma_tx, - "UART Tx DMA", - (void *)uart_tx_dma_callback, up, - &(up->uart_dma.tx_dma_channel)); - - if (ret < 0) { - serial_omap_enable_ier_thri(up); - return; - } - } - spin_lock(&(up->uart_dma.tx_lock)); - up->uart_dma.tx_dma_used = true; - spin_unlock(&(up->uart_dma.tx_lock)); - - start = up->uart_dma.tx_buf_dma_phys + - (xmit->tail & (UART_XMIT_SIZE - 1)); - - up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit); - /* - * It is a circular buffer. See if the buffer has wounded back. - * If yes it will have to be transferred in two separate dma - * transfers - */ - if (start + up->uart_dma.tx_buf_size >= - up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - up->uart_dma.tx_buf_size = - (up->uart_dma.tx_buf_dma_phys + - UART_XMIT_SIZE) - start; - - omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, start, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.tx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_tx, 0); - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.tx_dma_channel); + pm_runtime_get_sync(up->dev); + serial_omap_enable_ier_thri(up); + serial_omap_set_noidle(up); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static unsigned int check_modem_status(struct uart_omap_port *up) @@ -456,16 +364,8 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) spin_lock_irqsave(&up->port.lock, flags); lsr = serial_in(up, UART_LSR); if (iir & UART_IIR_RLSI) { - if (!up->use_dma) { - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - } else { - up->ier &= ~(UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - if ((serial_omap_start_rxdma(up) != 0) && - (lsr & UART_LSR_DR)) - receive_chars(up, &lsr); - } + if (lsr & UART_LSR_DR) + receive_chars(up, &lsr); } check_modem_status(up); @@ -616,20 +516,6 @@ static int serial_omap_startup(struct uart_port *port) spin_unlock_irqrestore(&up->port.lock, flags); up->msr_saved_flags = 0; - if (up->use_dma) { - free_page((unsigned long)up->port.state->xmit.buf); - up->port.state->xmit.buf = dma_alloc_coherent(NULL, - UART_XMIT_SIZE, - (dma_addr_t *)&(up->uart_dma.tx_buf_dma_phys), - 0); - init_timer(&(up->uart_dma.rx_timer)); - up->uart_dma.rx_timer.function = serial_omap_rxdma_poll; - up->uart_dma.rx_timer.data = up->port.line; - /* Currently the buffer size is 4KB. Can increase it */ - up->uart_dma.rx_buf = dma_alloc_coherent(NULL, - up->uart_dma.rx_buf_size, - (dma_addr_t *)&(up->uart_dma.rx_buf_dma_phys), 0); - } /* * Finally, enable interrupts. Note: Modem status interrupts * are set via set_termios(), which will be occurring imminently @@ -677,17 +563,6 @@ static void serial_omap_shutdown(struct uart_port *port) */ if (serial_in(up, UART_LSR) & UART_LSR_DR) (void) serial_in(up, UART_RX); - if (up->use_dma) { - dma_free_coherent(up->port.dev, - UART_XMIT_SIZE, up->port.state->xmit.buf, - up->uart_dma.tx_buf_dma_phys); - up->port.state->xmit.buf = NULL; - serial_omap_stop_rx(port); - dma_free_coherent(up->port.dev, - up->uart_dma.rx_buf_size, up->uart_dma.rx_buf, - up->uart_dma.rx_buf_dma_phys); - up->uart_dma.rx_buf = NULL; - } pm_runtime_put(up->dev); free_irq(up->port.irq, up); @@ -814,8 +689,6 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, up->fcr = UART_FCR_R_TRIG_01 | UART_FCR_T_TRIG_01 | UART_FCR_ENABLE_FIFO; - if (up->use_dma) - up->fcr |= UART_FCR_DMA_SELECT; /* * Ok, we're now changing the port state. Do it with @@ -891,14 +764,9 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; - if (up->use_dma) { - serial_out(up, UART_TI752_TLR, 0); - up->scr |= UART_FCR_TRIGGER_4; - } else { - /* Set receive FIFO threshold to 1 byte */ - up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; - up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); - } + /* Set receive FIFO threshold to 1 byte */ + up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; + up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); @@ -1267,149 +1135,6 @@ static int serial_omap_resume(struct device *dev) } #endif -static void serial_omap_rxdma_poll(unsigned long uart_no) -{ - struct uart_omap_port *up = ui[uart_no]; - unsigned int curr_dma_pos, curr_transmitted_size; - int ret = 0; - - curr_dma_pos = omap_get_dma_dst_pos(up->uart_dma.rx_dma_channel); - if ((curr_dma_pos == up->uart_dma.prev_rx_dma_pos) || - (curr_dma_pos == 0)) { - if (jiffies_to_msecs(jiffies - up->port_activity) < - up->uart_dma.rx_timeout) { - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_poll_rate)); - } else { - serial_omap_stop_rxdma(up); - up->ier |= (UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - } - return; - } - - curr_transmitted_size = curr_dma_pos - - up->uart_dma.prev_rx_dma_pos; - up->port.icount.rx += curr_transmitted_size; - tty_insert_flip_string(up->port.state->port.tty, - up->uart_dma.rx_buf + - (up->uart_dma.prev_rx_dma_pos - - up->uart_dma.rx_buf_dma_phys), - curr_transmitted_size); - tty_flip_buffer_push(up->port.state->port.tty); - up->uart_dma.prev_rx_dma_pos = curr_dma_pos; - if (up->uart_dma.rx_buf_size + - up->uart_dma.rx_buf_dma_phys == curr_dma_pos) { - ret = serial_omap_start_rxdma(up); - if (ret < 0) { - serial_omap_stop_rxdma(up); - up->ier |= (UART_IER_RDI | UART_IER_RLSI); - serial_out(up, UART_IER, up->ier); - } - } else { - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_poll_rate)); - } - up->port_activity = jiffies; -} - -static void uart_rx_dma_callback(int lch, u16 ch_status, void *data) -{ - return; -} - -static int serial_omap_start_rxdma(struct uart_omap_port *up) -{ - int ret = 0; - - if (up->uart_dma.rx_dma_channel == -1) { - pm_runtime_get_sync(up->dev); - ret = omap_request_dma(up->uart_dma.uart_dma_rx, - "UART Rx DMA", - (void *)uart_rx_dma_callback, up, - &(up->uart_dma.rx_dma_channel)); - if (ret < 0) - return ret; - - omap_set_dma_src_params(up->uart_dma.rx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_dest_params(up->uart_dma.rx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, - up->uart_dma.rx_buf_dma_phys, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.rx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.rx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_rx, 0); - } - up->uart_dma.prev_rx_dma_pos = up->uart_dma.rx_buf_dma_phys; - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.rx_dma_channel); - mod_timer(&up->uart_dma.rx_timer, jiffies + - usecs_to_jiffies(up->uart_dma.rx_poll_rate)); - up->uart_dma.rx_dma_used = true; - return ret; -} - -static void serial_omap_continue_tx(struct uart_omap_port *up) -{ - struct circ_buf *xmit = &up->port.state->xmit; - unsigned int start = up->uart_dma.tx_buf_dma_phys - + (xmit->tail & (UART_XMIT_SIZE - 1)); - - if (uart_circ_empty(xmit)) - return; - - up->uart_dma.tx_buf_size = uart_circ_chars_pending(xmit); - /* - * It is a circular buffer. See if the buffer has wounded back. - * If yes it will have to be transferred in two separate dma - * transfers - */ - if (start + up->uart_dma.tx_buf_size >= - up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - up->uart_dma.tx_buf_size = - (up->uart_dma.tx_buf_dma_phys + UART_XMIT_SIZE) - start; - omap_set_dma_dest_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_CONSTANT, - up->uart_dma.uart_base, 0, 0); - omap_set_dma_src_params(up->uart_dma.tx_dma_channel, 0, - OMAP_DMA_AMODE_POST_INC, start, 0, 0); - omap_set_dma_transfer_params(up->uart_dma.tx_dma_channel, - OMAP_DMA_DATA_TYPE_S8, - up->uart_dma.tx_buf_size, 1, - OMAP_DMA_SYNC_ELEMENT, - up->uart_dma.uart_dma_tx, 0); - /* FIXME: Cache maintenance needed here? */ - omap_start_dma(up->uart_dma.tx_dma_channel); -} - -static void uart_tx_dma_callback(int lch, u16 ch_status, void *data) -{ - struct uart_omap_port *up = data; - struct circ_buf *xmit = &up->port.state->xmit; - - xmit->tail = (xmit->tail + up->uart_dma.tx_buf_size) & \ - (UART_XMIT_SIZE - 1); - up->port.icount.tx += up->uart_dma.tx_buf_size; - - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) - uart_write_wakeup(&up->port); - - if (uart_circ_empty(xmit)) { - spin_lock(&(up->uart_dma.tx_lock)); - serial_omap_stop_tx(&up->port); - up->uart_dma.tx_dma_used = false; - spin_unlock(&(up->uart_dma.tx_lock)); - } else { - omap_stop_dma(up->uart_dma.tx_dma_channel); - serial_omap_continue_tx(up); - } - up->port_activity = jiffies; - return; -} - static void omap_serial_fill_features_erratas(struct uart_omap_port *up) { u32 mvr, scheme; @@ -1479,7 +1204,7 @@ static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev) static int serial_omap_probe(struct platform_device *pdev) { struct uart_omap_port *up; - struct resource *mem, *irq, *dma_tx, *dma_rx; + struct resource *mem, *irq; struct omap_uart_port_info *omap_up_info = pdev->dev.platform_data; int ret; @@ -1504,14 +1229,6 @@ static int serial_omap_probe(struct platform_device *pdev) return -EBUSY; } - dma_rx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "rx"); - if (!dma_rx) - return -ENXIO; - - dma_tx = platform_get_resource_byname(pdev, IORESOURCE_DMA, "tx"); - if (!dma_tx) - return -ENXIO; - if (gpio_is_valid(omap_up_info->DTR_gpio) && omap_up_info->DTR_present) { ret = gpio_request(omap_up_info->DTR_gpio, "omap-serial"); @@ -1574,20 +1291,6 @@ static int serial_omap_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "No clock speed specified: using default:" "%d\n", DEFAULT_CLK_SPEED); } - up->uart_dma.uart_base = mem->start; - - if (omap_up_info->dma_enabled) { - up->uart_dma.uart_dma_tx = dma_tx->start; - up->uart_dma.uart_dma_rx = dma_rx->start; - up->use_dma = 1; - up->uart_dma.rx_buf_size = omap_up_info->dma_rx_buf_size; - up->uart_dma.rx_timeout = omap_up_info->dma_rx_timeout; - up->uart_dma.rx_poll_rate = omap_up_info->dma_rx_poll_rate; - spin_lock_init(&(up->uart_dma.tx_lock)); - spin_lock_init(&(up->uart_dma.rx_lock)); - up->uart_dma.tx_dma_channel = OMAP_UART_DMA_CH_FREE; - up->uart_dma.rx_dma_channel = OMAP_UART_DMA_CH_FREE; - } up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE; up->calc_latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE; @@ -1730,10 +1433,6 @@ static int serial_omap_runtime_suspend(struct device *dev) } } - /* Errata i291 */ - if (up->use_dma && (up->errata & UART_ERRATA_i291_DMA_FORCEIDLE)) - serial_omap_set_forceidle(up); - up->latency = PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE; schedule_work(&up->qos_work); @@ -1751,11 +1450,6 @@ static int serial_omap_runtime_resume(struct device *dev) if (up->context_loss_cnt != loss_cnt) serial_omap_restore_context(up); - /* Errata i291 */ - if ((up->errata & UART_ERRATA_i291_DMA_FORCEIDLE) && - up->use_dma) - serial_omap_set_noidle(up); - up->latency = up->calc_latency; schedule_work(&up->qos_work); } From a0f38b87de1df05acf2e3cc23ee2f02a18d80c85 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:22 +0300 Subject: [PATCH 162/235] serial: add OMAP-specific defines OMAP has some extra Interrupt types which can be really useful for SW. Let's define them so we can later use those in OMAP's serial driver. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- include/linux/serial_reg.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h index 8ce70d76f83..5ed325e88a8 100644 --- a/include/linux/serial_reg.h +++ b/include/linux/serial_reg.h @@ -40,6 +40,10 @@ #define UART_IIR_BUSY 0x07 /* DesignWare APB Busy Detect */ +#define UART_IIR_RX_TIMEOUT 0x0c /* OMAP RX Timeout interrupt */ +#define UART_IIR_XOFF 0x10 /* OMAP XOFF/Special Character */ +#define UART_IIR_CTS_RTS_DSR 0x20 /* OMAP CTS/RTS/DSR Change */ + #define UART_FCR 2 /* Out: FIFO Control Register */ #define UART_FCR_ENABLE_FIFO 0x01 /* Enable the FIFO */ #define UART_FCR_CLEAR_RCVR 0x02 /* Clear the RCVR FIFO */ From 81b75aef11abfd7b51e719a5388189eefa82e997 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:23 +0300 Subject: [PATCH 163/235] serial: omap: simplify IRQ handling quite a few changes here, though they are pretty obvious. In summary we're making sure to detect which interrupt type we need to handle before calling the underlying interrupt handling procedure. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 55 +++++++++++++++++++++++--------- 1 file changed, 40 insertions(+), 15 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index dd3971fe899..d5a08cb5213 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -351,33 +351,58 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) { struct uart_omap_port *up = dev_id; unsigned int iir, lsr; + unsigned int type; unsigned long flags; - - pm_runtime_get_sync(up->dev); - iir = serial_in(up, UART_IIR); - if (iir & UART_IIR_NO_INT) { - pm_runtime_mark_last_busy(up->dev); - pm_runtime_put_autosuspend(up->dev); - return IRQ_NONE; - } + irqreturn_t ret = IRQ_NONE; spin_lock_irqsave(&up->port.lock, flags); + pm_runtime_get_sync(up->dev); + iir = serial_in(up, UART_IIR); +again: + if (iir & UART_IIR_NO_INT) + goto out; + + ret = IRQ_HANDLED; lsr = serial_in(up, UART_LSR); - if (iir & UART_IIR_RLSI) { + + /* extract IRQ type from IIR register */ + type = iir & 0x3e; + + switch (type) { + case UART_IIR_MSI: + check_modem_status(up); + break; + case UART_IIR_THRI: + if (lsr & UART_LSR_THRE) + transmit_chars(up); + break; + case UART_IIR_RDI: if (lsr & UART_LSR_DR) receive_chars(up, &lsr); + break; + case UART_IIR_RLSI: + if (lsr & UART_LSR_BRK_ERROR_BITS) + receive_chars(up, &lsr); + break; + case UART_IIR_RX_TIMEOUT: + receive_chars(up, &lsr); + break; + case UART_IIR_CTS_RTS_DSR: + iir = serial_in(up, UART_IIR); + goto again; + case UART_IIR_XOFF: + /* FALLTHROUGH */ + default: + break; } - check_modem_status(up); - if ((lsr & UART_LSR_THRE) && (iir & UART_IIR_THRI)) - transmit_chars(up); - +out: spin_unlock_irqrestore(&up->port.lock, flags); pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); - up->port_activity = jiffies; - return IRQ_HANDLED; + + return ret; } static unsigned int serial_omap_tx_empty(struct uart_port *port) From 72256cbd13904d4b4dbb16f5ec83a3293bb292c5 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:24 +0300 Subject: [PATCH 164/235] serial: omap: refactor receive_chars() into rdi/rlsi handlers receive_chars() was getting too big and too difficult to follow. By splitting it into separate RDI and RSLI handlers, we have smaller functions which are easy to understand and only touch the pieces which they need to touch. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 207 +++++++++++++++---------------- 1 file changed, 102 insertions(+), 105 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index d5a08cb5213..9c0a4ae97e6 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -196,74 +196,6 @@ static void serial_omap_stop_rx(struct uart_port *port) pm_runtime_put_autosuspend(up->dev); } -static inline void receive_chars(struct uart_omap_port *up, - unsigned int *status) -{ - struct tty_struct *tty = up->port.state->port.tty; - unsigned int flag, lsr = *status; - unsigned char ch = 0; - int max_count = 256; - - do { - if (likely(lsr & UART_LSR_DR)) - ch = serial_in(up, UART_RX); - flag = TTY_NORMAL; - up->port.icount.rx++; - - if (unlikely(lsr & UART_LSR_BRK_ERROR_BITS)) { - /* - * For statistics only - */ - if (lsr & UART_LSR_BI) { - lsr &= ~(UART_LSR_FE | UART_LSR_PE); - up->port.icount.brk++; - /* - * We do the SysRQ and SAK checking - * here because otherwise the break - * may get masked by ignore_status_mask - * or read_status_mask. - */ - if (uart_handle_break(&up->port)) - goto ignore_char; - } else if (lsr & UART_LSR_PE) { - up->port.icount.parity++; - } else if (lsr & UART_LSR_FE) { - up->port.icount.frame++; - } - - if (lsr & UART_LSR_OE) - up->port.icount.overrun++; - - /* - * Mask off conditions which should be ignored. - */ - lsr &= up->port.read_status_mask; - -#ifdef CONFIG_SERIAL_OMAP_CONSOLE - if (up->port.line == up->port.cons->index) { - /* Recover the break flag from console xmit */ - lsr |= up->lsr_break_flag; - } -#endif - if (lsr & UART_LSR_BI) - flag = TTY_BREAK; - else if (lsr & UART_LSR_PE) - flag = TTY_PARITY; - else if (lsr & UART_LSR_FE) - flag = TTY_FRAME; - } - - if (uart_handle_sysrq_char(&up->port, ch)) - goto ignore_char; - uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); -ignore_char: - lsr = serial_in(up, UART_LSR); - } while ((lsr & (UART_LSR_DR | UART_LSR_BI)) && (max_count-- > 0)); - spin_unlock(&up->port.lock); - tty_flip_buffer_push(tty); - spin_lock(&up->port.lock); -} - static void transmit_chars(struct uart_omap_port *up) { struct circ_buf *xmit = &up->port.state->xmit; @@ -342,6 +274,68 @@ static unsigned int check_modem_status(struct uart_omap_port *up) return status; } +static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr) +{ + unsigned int flag; + + up->port.icount.rx++; + flag = TTY_NORMAL; + + if (lsr & UART_LSR_BI) { + flag = TTY_BREAK; + lsr &= ~(UART_LSR_FE | UART_LSR_PE); + up->port.icount.brk++; + /* + * We do the SysRQ and SAK checking + * here because otherwise the break + * may get masked by ignore_status_mask + * or read_status_mask. + */ + if (uart_handle_break(&up->port)) + return; + + } + + if (lsr & UART_LSR_PE) { + flag = TTY_PARITY; + up->port.icount.parity++; + } + + if (lsr & UART_LSR_FE) { + flag = TTY_FRAME; + up->port.icount.frame++; + } + + if (lsr & UART_LSR_OE) + up->port.icount.overrun++; + +#ifdef CONFIG_SERIAL_OMAP_CONSOLE + if (up->port.line == up->port.cons->index) { + /* Recover the break flag from console xmit */ + lsr |= up->lsr_break_flag; + } +#endif + uart_insert_char(&up->port, lsr, UART_LSR_OE, 0, flag); +} + +static void serial_omap_rdi(struct uart_omap_port *up, unsigned int lsr) +{ + unsigned char ch = 0; + unsigned int flag; + + if (!(lsr & UART_LSR_DR)) + return; + + ch = serial_in(up, UART_RX); + flag = TTY_NORMAL; + up->port.icount.rx++; + + if (uart_handle_sysrq_char(&up->port, ch)) + return; + + uart_insert_char(&up->port, lsr, UART_LSR_OE, ch, flag); +} + /** * serial_omap_irq() - This handles the interrupt from one port * @irq: uart port irq number @@ -350,54 +344,57 @@ static unsigned int check_modem_status(struct uart_omap_port *up) static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) { struct uart_omap_port *up = dev_id; + struct tty_struct *tty = up->port.state->port.tty; unsigned int iir, lsr; unsigned int type; unsigned long flags; irqreturn_t ret = IRQ_NONE; + int max_count = 256; spin_lock_irqsave(&up->port.lock, flags); pm_runtime_get_sync(up->dev); - iir = serial_in(up, UART_IIR); -again: - if (iir & UART_IIR_NO_INT) - goto out; - ret = IRQ_HANDLED; - lsr = serial_in(up, UART_LSR); - - /* extract IRQ type from IIR register */ - type = iir & 0x3e; - - switch (type) { - case UART_IIR_MSI: - check_modem_status(up); - break; - case UART_IIR_THRI: - if (lsr & UART_LSR_THRE) - transmit_chars(up); - break; - case UART_IIR_RDI: - if (lsr & UART_LSR_DR) - receive_chars(up, &lsr); - break; - case UART_IIR_RLSI: - if (lsr & UART_LSR_BRK_ERROR_BITS) - receive_chars(up, &lsr); - break; - case UART_IIR_RX_TIMEOUT: - receive_chars(up, &lsr); - break; - case UART_IIR_CTS_RTS_DSR: + do { iir = serial_in(up, UART_IIR); - goto again; - case UART_IIR_XOFF: - /* FALLTHROUGH */ - default: - break; - } + if (iir & UART_IIR_NO_INT) + break; + + ret = IRQ_HANDLED; + lsr = serial_in(up, UART_LSR); + + /* extract IRQ type from IIR register */ + type = iir & 0x3e; + + switch (type) { + case UART_IIR_MSI: + check_modem_status(up); + break; + case UART_IIR_THRI: + if (lsr & UART_LSR_THRE) + transmit_chars(up); + break; + case UART_IIR_RX_TIMEOUT: + /* FALLTHROUGH */ + case UART_IIR_RDI: + serial_omap_rdi(up, lsr); + break; + case UART_IIR_RLSI: + serial_omap_rlsi(up, lsr); + break; + case UART_IIR_CTS_RTS_DSR: + /* simply try again */ + break; + case UART_IIR_XOFF: + /* FALLTHROUGH */ + default: + break; + } + } while (!(iir & UART_IIR_NO_INT) && max_count--); -out: spin_unlock_irqrestore(&up->port.lock, flags); + + tty_flip_buffer_push(tty); + pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); up->port_activity = jiffies; From bf63a0862c964f9015d0d8e3c2ccca7005eebea2 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:25 +0300 Subject: [PATCH 165/235] serial: omap: move THRE check to transmit_chars() since all other IRQ types now do all necessary checks inside their handlers, transmit_chars() was the only one left expecting serial_omap_irq() to check THRE for it. We can move THRE check to transmit_chars() in order to make serial_omap_irq() more uniform. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 9c0a4ae97e6..d3fbb70a8e8 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -196,11 +196,14 @@ static void serial_omap_stop_rx(struct uart_port *port) pm_runtime_put_autosuspend(up->dev); } -static void transmit_chars(struct uart_omap_port *up) +static void transmit_chars(struct uart_omap_port *up, unsigned int lsr) { struct circ_buf *xmit = &up->port.state->xmit; int count; + if (!(lsr & UART_LSR_THRE)) + return; + if (up->port.x_char) { serial_out(up, UART_TX, up->port.x_char); up->port.icount.tx++; @@ -370,8 +373,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) check_modem_status(up); break; case UART_IIR_THRI: - if (lsr & UART_LSR_THRE) - transmit_chars(up); + transmit_chars(up, lsr); break; case UART_IIR_RX_TIMEOUT: /* FALLTHROUGH */ From 660ac5f48a64026ad54c77d06f8360544e84dc84 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:26 +0300 Subject: [PATCH 166/235] serial: omap: stick to put_autosuspend Everytime we're done using our TTY, we want the pm timer to be reinitilized. By sticking to pm_runtime_pm_autosuspend() we make sure that this will always be the case. The idea behind this patch is to make sure we will always reinitialize the pm timer so that we don't fall into a situation where pm_runtime_put() expires right away (if timer was already about to expire when we made the call to pm_runtime_put()). While suspending right away wouldn't cause any issues, reinitializing the pm timer can help us avoiding unnecessary context save & restore operations (which are somewhat expensive) if there's another read/write/set_termios request coming right after. IOW, we are trying to make sure UART is still powered up while it's still under heavy usage. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 33 +++++++++++++++++++++----------- 1 file changed, 22 insertions(+), 11 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index d3fbb70a8e8..b2043df42a4 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -165,7 +165,8 @@ static void serial_omap_enable_ms(struct uart_port *port) pm_runtime_get_sync(up->dev); up->ier |= UART_IER_MSI; serial_out(up, UART_IER, up->ier); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static void serial_omap_stop_tx(struct uart_port *port) @@ -415,7 +416,8 @@ static unsigned int serial_omap_tx_empty(struct uart_port *port) spin_lock_irqsave(&up->port.lock, flags); ret = serial_in(up, UART_LSR) & UART_LSR_TEMT ? TIOCSER_TEMT : 0; spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); return ret; } @@ -427,7 +429,8 @@ static unsigned int serial_omap_get_mctrl(struct uart_port *port) pm_runtime_get_sync(up->dev); status = check_modem_status(up); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); dev_dbg(up->port.dev, "serial_omap_get_mctrl+%d\n", up->port.line); @@ -463,7 +466,8 @@ static void serial_omap_set_mctrl(struct uart_port *port, unsigned int mctrl) up->mcr = serial_in(up, UART_MCR); up->mcr |= mcr; serial_out(up, UART_MCR, up->mcr); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); if (gpio_is_valid(up->DTR_gpio) && !!(mctrl & TIOCM_DTR) != up->DTR_active) { @@ -490,7 +494,8 @@ static void serial_omap_break_ctl(struct uart_port *port, int break_state) up->lcr &= ~UART_LCR_SBC; serial_out(up, UART_LCR, up->lcr); spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static int serial_omap_startup(struct uart_port *port) @@ -588,7 +593,8 @@ static void serial_omap_shutdown(struct uart_port *port) if (serial_in(up, UART_LSR) & UART_LSR_DR) (void) serial_in(up, UART_RX); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); free_irq(up->port.irq, up); } @@ -862,7 +868,8 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, serial_omap_configure_xonxoff(up, termios); spin_unlock_irqrestore(&up->port.lock, flags); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); } @@ -893,7 +900,8 @@ serial_omap_pm(struct uart_port *port, unsigned int state, pm_runtime_allow(up->dev); } - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static void serial_omap_release_port(struct uart_port *port) @@ -975,7 +983,8 @@ static void serial_omap_poll_put_char(struct uart_port *port, unsigned char ch) pm_runtime_get_sync(up->dev); wait_for_xmitr(up); serial_out(up, UART_TX, ch); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); } static int serial_omap_poll_get_char(struct uart_port *port) @@ -989,7 +998,8 @@ static int serial_omap_poll_get_char(struct uart_port *port) return NO_POLL_CHAR; status = serial_in(up, UART_RX); - pm_runtime_put(up->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); return status; } @@ -1340,7 +1350,8 @@ static int serial_omap_probe(struct platform_device *pdev) if (ret != 0) goto err_add_port; - pm_runtime_put(&pdev->dev); + pm_runtime_mark_last_busy(up->dev); + pm_runtime_put_autosuspend(up->dev); platform_set_drvdata(pdev, up); return 0; From 93220dcc3052182e7156c09655ad1316055564b9 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:27 +0300 Subject: [PATCH 167/235] serial: omap: set dev->drvdata before enabling pm_runtime by the time we call our first pm_runtme_get_sync() after enable pm_runtime, our resume method might be called. To avoid problems, we must make sure that our dev->drvdata is set correctly before our resume method gets called. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index b2043df42a4..8a696a4efbe 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1333,6 +1333,7 @@ static int serial_omap_probe(struct platform_device *pdev) serial_omap_uart_wq = create_singlethread_workqueue(up->name); INIT_WORK(&up->qos_work, serial_omap_uart_qos_work); + platform_set_drvdata(pdev, up); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, omap_up_info->autosuspend_timeout); @@ -1352,7 +1353,6 @@ static int serial_omap_probe(struct platform_device *pdev) pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); - platform_set_drvdata(pdev, up); return 0; err_add_port: From 1b42c8b29b1822436e690fd0a7906aaa62099f91 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:28 +0300 Subject: [PATCH 168/235] serial: omap: drop unnecessary check from remove if platform_get_drvdata() returns NULL, that's quite a nasty bug on the driver which we want to catch ASAP. Otherwise, that check is hugely unneeded. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 8a696a4efbe..c19d340f6ba 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1369,13 +1369,10 @@ static int serial_omap_remove(struct platform_device *dev) { struct uart_omap_port *up = platform_get_drvdata(dev); - if (up) { - pm_runtime_disable(up->dev); - uart_remove_one_port(&serial_omap_reg, &up->port); - pm_qos_remove_request(&up->pm_qos_request); - } + pm_runtime_disable(up->dev); + uart_remove_one_port(&serial_omap_reg, &up->port); + pm_qos_remove_request(&up->pm_qos_request); - platform_set_drvdata(dev, NULL); return 0; } From 7e9c8e7dbf3b9cc94947d76cb57985682517cc6e Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:29 +0300 Subject: [PATCH 169/235] serial: omap: make sure to suspend device before remove before removing the driver, let's make sure to force device into a suspended state in order to conserve power. Tested-by: Shubhrajyoti D Acked-by: Santosh Shilimkar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index c19d340f6ba..0ceca4457d3 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1369,6 +1369,7 @@ static int serial_omap_remove(struct platform_device *dev) { struct uart_omap_port *up = platform_get_drvdata(dev); + pm_runtime_put_sync(up->dev); pm_runtime_disable(up->dev); uart_remove_one_port(&serial_omap_reg, &up->port); pm_qos_remove_request(&up->pm_qos_request); From 6c3a30c7fbed820f65d5e708f1e83468d8ec9921 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:30 +0300 Subject: [PATCH 170/235] serial: omap: don't save IRQ flags on hardirq When we're running our hardirq handler, there's not need to disable IRQs with spin_lock_irqsave() because IRQs are already disabled. It also makes no difference if we save or not IRQ flags. Switch over to simple spin_lock/spin_unlock and drop the "flags" variable. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 0ceca4457d3..99042b0fb94 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -351,11 +351,10 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) struct tty_struct *tty = up->port.state->port.tty; unsigned int iir, lsr; unsigned int type; - unsigned long flags; irqreturn_t ret = IRQ_NONE; int max_count = 256; - spin_lock_irqsave(&up->port.lock, flags); + spin_lock(&up->port.lock); pm_runtime_get_sync(up->dev); do { @@ -394,7 +393,7 @@ static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) } } while (!(iir & UART_IIR_NO_INT) && max_count--); - spin_unlock_irqrestore(&up->port.lock, flags); + spin_unlock(&up->port.lock); tty_flip_buffer_push(tty); From 856e35bf596e83a63c8a9ec749e9f2bcd24a1bdd Mon Sep 17 00:00:00 2001 From: Ruchika Kharwar Date: Thu, 6 Sep 2012 15:45:31 +0300 Subject: [PATCH 171/235] serial: omap: fix sequence of pm_runtime_* calls. pm_runtime_enable() needs to be invoked before pm_runtime_use_autosuspend(), and pm_runtime_set_autosuspend_delay() functions. Tested-by: Shubhrajyoti D Signed-off-by: Nishanth Menon Signed-off-by: Ruchika Kharwar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 99042b0fb94..f5dcb5aa000 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1333,12 +1333,12 @@ static int serial_omap_probe(struct platform_device *pdev) INIT_WORK(&up->qos_work, serial_omap_uart_qos_work); platform_set_drvdata(pdev, up); + pm_runtime_enable(&pdev->dev); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_set_autosuspend_delay(&pdev->dev, omap_up_info->autosuspend_timeout); pm_runtime_irq_safe(&pdev->dev); - pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); omap_serial_fill_features_erratas(up); From 6d608ef351bbd0b49427b5b6c6ec6d7622bc0d22 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:32 +0300 Subject: [PATCH 172/235] serial: omap: optimization with section annotations Two functions: omap_serial_fill_features_erratas() and of_get_uart_port_info() are only called from probe(). Marking them as __devinit gives us another oportunity to free some code after .init.text is done. Tested-by: Shubhrajyoti D Signed-off-by: Ruchika Kharwar Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index f5dcb5aa000..906826083e0 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1168,7 +1168,7 @@ static int serial_omap_resume(struct device *dev) } #endif -static void omap_serial_fill_features_erratas(struct uart_omap_port *up) +static void __devinit omap_serial_fill_features_erratas(struct uart_omap_port *up) { u32 mvr, scheme; u16 revision, major, minor; @@ -1221,7 +1221,7 @@ static void omap_serial_fill_features_erratas(struct uart_omap_port *up) } } -static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev) +static __devinit struct omap_uart_port_info *of_get_uart_port_info(struct device *dev) { struct omap_uart_port_info *omap_up_info; @@ -1234,7 +1234,7 @@ static struct omap_uart_port_info *of_get_uart_port_info(struct device *dev) return omap_up_info; } -static int serial_omap_probe(struct platform_device *pdev) +static int __devinit serial_omap_probe(struct platform_device *pdev) { struct uart_omap_port *up; struct resource *mem, *irq; @@ -1364,7 +1364,7 @@ err_port_line: return ret; } -static int serial_omap_remove(struct platform_device *dev) +static int __devexit serial_omap_remove(struct platform_device *dev) { struct uart_omap_port *up = platform_get_drvdata(dev); @@ -1508,7 +1508,7 @@ MODULE_DEVICE_TABLE(of, omap_serial_of_match); static struct platform_driver serial_omap_driver = { .probe = serial_omap_probe, - .remove = serial_omap_remove, + .remove = __devexit_p(serial_omap_remove), .driver = { .name = DRIVER_NAME, .pm = &serial_omap_dev_pm_ops, From 52c5513d5925554d1e22288525bcb7d25fa98b16 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:33 +0300 Subject: [PATCH 173/235] serial: omap: drop "inline" from IRQ handler prototype it makes no sense to mark our IRQ handler inline since it's passed as a function pointer when enabling the IRQ line. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 906826083e0..d244163c99d 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -345,7 +345,7 @@ static void serial_omap_rdi(struct uart_omap_port *up, unsigned int lsr) * @irq: uart port irq number * @dev_id: uart port info */ -static inline irqreturn_t serial_omap_irq(int irq, void *dev_id) +static irqreturn_t serial_omap_irq(int irq, void *dev_id) { struct uart_omap_port *up = dev_id; struct tty_struct *tty = up->port.state->port.tty; From 0324a821029e1f54e7a7f8fed48693cfce42dc0e Mon Sep 17 00:00:00 2001 From: Ruchika Kharwar Date: Thu, 6 Sep 2012 15:45:34 +0300 Subject: [PATCH 174/235] serial: omap: unlock the port lock This patch unlocks the port lock before calling a serial_core API and re-acquires the port lock after calling it. This patch fixes a system freeze issue seen when the serial_core API uart_write_wakeup() eventually attempts to acquire the port lock already acquired by omap serial interrupt handler. Tested-by: Shubhrajyoti D Signed-off-by: Ruchika Kharwar Signed-off-by: Pavan Savoy Signed-off-by: Vijay Badawadagi Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index d244163c99d..9e4419ca302 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -224,8 +224,11 @@ static void transmit_chars(struct uart_omap_port *up, unsigned int lsr) break; } while (--count > 0); - if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) + if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) { + spin_unlock(&up->port.lock); uart_write_wakeup(&up->port); + spin_lock(&up->port.lock); + } if (uart_circ_empty(xmit)) serial_omap_stop_tx(&up->port); From 9727faf4706eb49ce88e3f2bb961278a84eac080 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:35 +0300 Subject: [PATCH 175/235] serial: omap: implement set_wake This has been missing from OMAP UART driver for quite a while and it's simple enough to implement it. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 9e4419ca302..7531147fbd3 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -875,6 +875,15 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, dev_dbg(up->port.dev, "serial_omap_set_termios+%d\n", up->port.line); } +static int serial_omap_set_wake(struct uart_port *port, unsigned int state) +{ + struct uart_omap_port *up = to_uart_omap_port(port); + + serial_omap_enable_wakeup(up, state); + + return 0; +} + static void serial_omap_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) @@ -1129,6 +1138,7 @@ static struct uart_ops serial_omap_pops = { .shutdown = serial_omap_shutdown, .set_termios = serial_omap_set_termios, .pm = serial_omap_pm, + .set_wake = serial_omap_set_wake, .type = serial_omap_type, .release_port = serial_omap_release_port, .request_port = serial_omap_request_port, From a6b19c333c2f100f32e07d5209cf9f0b4f81b6eb Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:36 +0300 Subject: [PATCH 176/235] serial: omap: make sure to put() on poll_get_char if we would reach serial_omap_get_char() while Data Ready bit isn't set, we would return from it without kicking our pm timer. This would mean we would, eventually, have an unbalanced pm_runtime_get on our device which would prevent it from ever sleeping again. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 7531147fbd3..6a58f4f64f8 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1005,12 +1005,17 @@ static int serial_omap_poll_get_char(struct uart_port *port) pm_runtime_get_sync(up->dev); status = serial_in(up, UART_LSR); - if (!(status & UART_LSR_DR)) - return NO_POLL_CHAR; + if (!(status & UART_LSR_DR)) { + status = NO_POLL_CHAR; + goto out; + } status = serial_in(up, UART_RX); + +out: pm_runtime_mark_last_busy(up->dev); pm_runtime_put_autosuspend(up->dev); + return status; } From 957ee7270d632245b43f6feb0e70d9a5e9ea6cf6 Mon Sep 17 00:00:00 2001 From: Vikram Pandita Date: Thu, 6 Sep 2012 15:45:37 +0300 Subject: [PATCH 177/235] serial: omap: fix software flow control Software flow control register bits were not defined correctly. Also clarify the IXON and IXOFF logic to reflect what userspace wants. Cc: stable@vger.kernel.org Tested-by: Shubhrajyoti D Signed-off-by: Vikram Pandita Signed-off-by: Shubhrajyoti D Acked-by: Tony Lindgren Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- arch/arm/plat-omap/include/plat/omap-serial.h | 4 ++-- drivers/tty/serial/omap-serial.c | 12 ++++++------ 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 90d2d74d168..a79ed8b17d9 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -42,10 +42,10 @@ #define OMAP_UART_WER_MOD_WKUP 0X7F /* Enable XON/XOFF flow control on output */ -#define OMAP_UART_SW_TX 0x04 +#define OMAP_UART_SW_TX 0x8 /* Enable XON/XOFF flow control on input */ -#define OMAP_UART_SW_RX 0x04 +#define OMAP_UART_SW_RX 0x2 #define OMAP_UART_SYSC_RESET 0X07 #define OMAP_UART_TCR_TRIG 0X0F diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 6a58f4f64f8..1ba1f439a5b 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -617,19 +617,19 @@ serial_omap_configure_xonxoff /* * IXON Flag: - * Enable XON/XOFF flow control on output. - * Transmit XON1, XOFF1 + * Flow control for OMAP.TX + * OMAP.RX should listen for XON/XOFF */ if (termios->c_iflag & IXON) - up->efr |= OMAP_UART_SW_TX; + up->efr |= OMAP_UART_SW_RX; /* * IXOFF Flag: - * Enable XON/XOFF flow control on input. - * Receiver compares XON1, XOFF1. + * Flow control for OMAP.RX + * OMAP.TX should send XON/XOFF */ if (termios->c_iflag & IXOFF) - up->efr |= OMAP_UART_SW_RX; + up->efr |= OMAP_UART_SW_TX; serial_out(up, UART_EFR, up->efr | UART_EFR_ECB); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_A); From d21e4005e4a4c24939f239b49862e6b0852e9169 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:38 +0300 Subject: [PATCH 178/235] serial: omap: remove unnecessary header and add a missing one this driver doesn't use any from , so we can remove it without any problems. This will, however cause a problem because omap-serial.c was relying on indirect inclusion of , let's fix the issue by including on omap-serial.c as it should be. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 1ba1f439a5b..881b652220b 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include #include @@ -40,7 +41,6 @@ #include #include -#include #include #define UART_BUILD_REVISION(x, y) (((x) << 8) | (y)) From d37c6cebcb0c7ab4fc9e000061c93cca9d2a3941 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:39 +0300 Subject: [PATCH 179/235] serial: omap: move uart_omap_port definition to C file nobody needs to access the uart_omap_port structure other than omap-serial.c file. Let's move that structure definition to the C source file in order to prevent anyone from accessing our structure. Tested-by: Shubhrajyoti D Acked-by: Tony Lindgren Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- arch/arm/plat-omap/include/plat/omap-serial.h | 37 ------------------ drivers/tty/serial/omap-serial.c | 38 +++++++++++++++++++ 2 files changed, 38 insertions(+), 37 deletions(-) diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index a79ed8b17d9..3c9fd3e4263 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -105,45 +105,8 @@ struct uart_omap_dma { unsigned int rx_timeout; }; -struct uart_omap_port { - struct uart_port port; - struct uart_omap_dma uart_dma; - struct device *dev; - - unsigned char ier; - unsigned char lcr; - unsigned char mcr; - unsigned char fcr; - unsigned char efr; - unsigned char dll; - unsigned char dlh; - unsigned char mdr1; - unsigned char scr; - - int use_dma; - /* - * Some bits in registers are cleared on a read, so they must - * be saved whenever the register is read but the bits will not - * be immediately processed. - */ - unsigned int lsr_break_flag; - unsigned char msr_saved_flags; - char name[20]; - unsigned long port_activity; - u32 context_loss_cnt; - u32 errata; - u8 wakeups_enabled; int DTR_gpio; int DTR_inverted; int DTR_active; - - struct pm_qos_request pm_qos_request; - u32 latency; - u32 calc_latency; - struct work_struct qos_work; -}; - -#define to_uart_omap_port(p) ((container_of((p), struct uart_omap_port, port))) - #endif /* __OMAP_SERIAL_H__ */ diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 881b652220b..164c3c94067 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -70,6 +70,44 @@ #define OMAP_UART_MVR_MAJ_SHIFT 8 #define OMAP_UART_MVR_MIN_MASK 0x3f +struct uart_omap_port { + struct uart_port port; + struct uart_omap_dma uart_dma; + struct device *dev; + + unsigned char ier; + unsigned char lcr; + unsigned char mcr; + unsigned char fcr; + unsigned char efr; + unsigned char dll; + unsigned char dlh; + unsigned char mdr1; + unsigned char scr; + + int use_dma; + /* + * Some bits in registers are cleared on a read, so they must + * be saved whenever the register is read but the bits will not + * be immediately processed. + */ + unsigned int lsr_break_flag; + unsigned char msr_saved_flags; + char name[20]; + unsigned long port_activity; + u32 context_loss_cnt; + u32 errata; + u8 wakeups_enabled; + unsigned int irq_pending:1; + + struct pm_qos_request pm_qos_request; + u32 latency; + u32 calc_latency; + struct work_struct qos_work; +}; + +#define to_uart_omap_port(p) ((container_of((p), struct uart_omap_port, port))) + static struct uart_omap_port *ui[OMAP_MAX_HSUART_PORTS]; /* Forward declaration of functions */ From 6721ab7f77f2614ab43e3de2f908b1d7436331df Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Thu, 6 Sep 2012 15:45:40 +0300 Subject: [PATCH 180/235] serial: omap: enable RX and TX FIFO usage enable RX FIFO for 16 characters and TX FIFO for 16 spaces. Tested-by: Shubhrajyoti D Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 164c3c94067..cfd209485af 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -56,8 +56,8 @@ #define OMAP_UART_SCR_RX_TRIG_GRANU1_MASK (1 << 7) /* FCR register bitmasks */ -#define OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT 6 #define OMAP_UART_FCR_RX_FIFO_TRIG_MASK (0x3 << 6) +#define OMAP_UART_FCR_TX_FIFO_TRIG_MASK (0x3 << 4) /* MVR register bitmasks */ #define OMAP_UART_MVR_SCHEME_SHIFT 30 @@ -834,9 +834,13 @@ serial_omap_set_termios(struct uart_port *port, struct ktermios *termios, up->scr |= OMAP_UART_SCR_RX_TRIG_GRANU1_MASK; - /* Set receive FIFO threshold to 1 byte */ + /* Set receive FIFO threshold to 16 characters and + * transmit FIFO threshold to 16 spaces + */ up->fcr &= ~OMAP_UART_FCR_RX_FIFO_TRIG_MASK; - up->fcr |= (0x1 << OMAP_UART_FCR_RX_FIFO_TRIG_SHIFT); + up->fcr &= ~OMAP_UART_FCR_TX_FIFO_TRIG_MASK; + up->fcr |= UART_FCR6_R_TRIGGER_16 | UART_FCR6_T_TRIGGER_24 | + UART_FCR_ENABLE_FIFO; serial_out(up, UART_FCR, up->fcr); serial_out(up, UART_LCR, UART_LCR_CONF_MODE_B); From 37cd0c994fc8ecbfb258c4be2442d9d6f31447ea Mon Sep 17 00:00:00 2001 From: Fengguang Wu Date: Thu, 6 Sep 2012 10:27:51 +0800 Subject: [PATCH 181/235] serial_core: fix sizeof(pointer) sizeof when applied to a pointer typed expression gives the size of the pointer. Generated by: scripts/coccinelle/misc/noderef.cocci Signed-off-by: Fengguang Wu Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 137b25ce39a..19993d89db3 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -640,7 +640,7 @@ static void uart_get_info(struct tty_port *port, { struct uart_port *uport = state->uart_port; - memset(retinfo, 0, sizeof(retinfo)); + memset(retinfo, 0, sizeof(*retinfo)); retinfo->type = uport->type; retinfo->line = uport->line; From 851b714b29db0e394c293170e714f90a778060ad Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Thu, 6 Sep 2012 22:38:40 -0400 Subject: [PATCH 182/235] serial: mxs-auart: fix the wrong setting order After set the AUART_CTRL0_CLKGATE, the UART will gate all the clocks off. So the following line will not take effect. ................................................................ writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN, u->membase + AUART_INTR_CLR); ................................................................ To fix this issue, the patch moves this gate-off line to the end of setting registers. Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mxs-auart.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index dafeef2bfb4..ea5f88869cd 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -457,11 +457,11 @@ static void mxs_auart_shutdown(struct uart_port *u) writel(AUART_CTRL2_UARTEN, u->membase + AUART_CTRL2_CLR); - writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET); - writel(AUART_INTR_RXIEN | AUART_INTR_RTIEN | AUART_INTR_CTSMIEN, u->membase + AUART_INTR_CLR); + writel(AUART_CTRL0_CLKGATE, u->membase + AUART_CTRL0_SET); + clk_disable_unprepare(s->clk); } From b69200fbdf209f356f375da0cfd672f61c7a5866 Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Thu, 6 Sep 2012 22:38:41 -0400 Subject: [PATCH 183/235] serial: mxs-auart: put the device in mxs_auart_probe() We call the get_device() in the mxs_auart_probe(). For the balance of the reference count, we should put the device in the mxs_auart_remove(). Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mxs-auart.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index ea5f88869cd..68984136bfb 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -796,6 +796,7 @@ static int __devexit mxs_auart_remove(struct platform_device *pdev) auart_port[pdev->id] = NULL; + put_device(s->dev); clk_put(s->clk); free_irq(s->irq, s); kfree(s); From d83b54250988758cd3b9d21c242f98ae61fa1435 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Thu, 6 Sep 2012 15:05:04 +1000 Subject: [PATCH 184/235] serial: serial_core.h needs console.h included first Fixes these build errors: In file included from drivers/tty/serial/sccnxp.c:20:0: include/linux/serial_core.h: In function 'uart_handle_break': include/linux/serial_core.h:543:30: error: dereferencing pointer to incomplete type Signed-off-by: Stephen Rothwell Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 29dda9ba6f0..05d767cf82a 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -17,12 +17,12 @@ #include #include +#include #include #include #include #include #include -#include #include #include From 6915c0e487c822e2436683e14302c0b8a6155cc7 Mon Sep 17 00:00:00 2001 From: Tomas Hlavacek Date: Thu, 6 Sep 2012 03:17:18 +0200 Subject: [PATCH 185/235] tty: uartclk value from serial_core exposed to sysfs Added file /sys/devices/.../tty/ttySX/uartclk to allow reading uartclk value in struct uart_port in serial_core via sysfs. tty_register_device() has been generalized and refactored in order to add support for setting drvdata and attribute_group to the device. Signed-off-by: Tomas Hlavacek Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-tty | 9 ++++ drivers/tty/serial/serial_core.c | 34 +++++++++++++- drivers/tty/tty_io.c | 69 ++++++++++++++++++++++++----- include/linux/tty.h | 4 ++ 4 files changed, 104 insertions(+), 12 deletions(-) diff --git a/Documentation/ABI/testing/sysfs-tty b/Documentation/ABI/testing/sysfs-tty index b138b663bf5..0c430150d92 100644 --- a/Documentation/ABI/testing/sysfs-tty +++ b/Documentation/ABI/testing/sysfs-tty @@ -17,3 +17,12 @@ Description: device, like 'tty1'. The file supports poll() to detect virtual console switches. + +What: /sys/class/tty/ttyS0/uartclk +Date: Sep 2012 +Contact: Tomas Hlavacek +Description: + Shows the current uartclk value associated with the + UART port in serial_core, that is bound to TTY like ttyS0. + uartclk = 16 * baud_base + diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 19993d89db3..f629bdf2a8c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2309,6 +2309,36 @@ struct tty_driver *uart_console_device(struct console *co, int *index) return p->tty_driver; } +static ssize_t uart_get_attr_uartclk(struct device *dev, + struct device_attribute *attr, char *buf) +{ + int ret; + + struct tty_port *port = dev_get_drvdata(dev); + struct uart_state *state = container_of(port, struct uart_state, port); + mutex_lock(&state->port.mutex); + ret = snprintf(buf, PAGE_SIZE, "%d\n", state->uart_port->uartclk); + mutex_unlock(&state->port.mutex); + + return ret; +} + +static DEVICE_ATTR(uartclk, S_IRUSR | S_IRGRP, uart_get_attr_uartclk, NULL); + +static struct attribute *tty_dev_attrs[] = { + &dev_attr_uartclk.attr, + NULL, + }; + +static struct attribute_group tty_dev_attr_group = { + .attrs = tty_dev_attrs, + }; + +static const struct attribute_group *tty_dev_attr_groups[] = { + &tty_dev_attr_group, + NULL + }; + /** * uart_add_one_port - attach a driver-defined port structure * @drv: pointer to the uart low level driver structure for this port @@ -2362,8 +2392,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) * Register the port whether it's detected or not. This allows * setserial to be used to alter this ports parameters. */ - tty_dev = tty_port_register_device(port, drv->tty_driver, uport->line, - uport->dev); + tty_dev = tty_register_device_attr(drv->tty_driver, uport->line, + uport->dev, port, tty_dev_attr_groups); if (likely(!IS_ERR(tty_dev))) { device_set_wakeup_capable(tty_dev, 1); } else { diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index d3bf91a2930..dcb30d55d39 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3041,9 +3041,39 @@ static int tty_cdev_add(struct tty_driver *driver, dev_t dev, struct device *tty_register_device(struct tty_driver *driver, unsigned index, struct device *device) { - struct device *ret; + return tty_register_device_attr(driver, index, device, NULL, NULL); +} +EXPORT_SYMBOL(tty_register_device); + +/** + * tty_register_device_attr - register a tty device + * @driver: the tty driver that describes the tty device + * @index: the index in the tty driver for this tty device + * @device: a struct device that is associated with this tty device. + * This field is optional, if there is no known struct device + * for this tty device it can be set to NULL safely. + * @drvdata: Driver data to be set to device. + * @attr_grp: Attribute group to be set on device. + * + * Returns a pointer to the struct device for this tty device + * (or ERR_PTR(-EFOO) on error). + * + * This call is required to be made to register an individual tty device + * if the tty driver's flags have the TTY_DRIVER_DYNAMIC_DEV bit set. If + * that bit is not set, this function should not be called by a tty + * driver. + * + * Locking: ?? + */ +struct device *tty_register_device_attr(struct tty_driver *driver, + unsigned index, struct device *device, + void *drvdata, + const struct attribute_group **attr_grp) +{ char name[64]; - dev_t dev = MKDEV(driver->major, driver->minor_start) + index; + dev_t devt = MKDEV(driver->major, driver->minor_start) + index; + struct device *dev = NULL; + int retval = -ENODEV; bool cdev = false; if (index >= driver->num) { @@ -3058,19 +3088,38 @@ struct device *tty_register_device(struct tty_driver *driver, unsigned index, tty_line_name(driver, index, name); if (!(driver->flags & TTY_DRIVER_DYNAMIC_ALLOC)) { - int error = tty_cdev_add(driver, dev, index, 1); - if (error) - return ERR_PTR(error); + retval = tty_cdev_add(driver, devt, index, 1); + if (retval) + goto error; cdev = true; } - ret = device_create(tty_class, device, dev, NULL, name); - if (IS_ERR(ret) && cdev) - cdev_del(&driver->cdevs[index]); + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) { + retval = -ENOMEM; + goto error; + } - return ret; + dev->devt = devt; + dev->class = tty_class; + dev->parent = device; + dev_set_name(dev, "%s", name); + dev->groups = attr_grp; + dev_set_drvdata(dev, drvdata); + + retval = device_register(dev); + if (retval) + goto error; + + return dev; + +error: + put_device(dev); + if (cdev) + cdev_del(&driver->cdevs[index]); + return ERR_PTR(retval); } -EXPORT_SYMBOL(tty_register_device); +EXPORT_SYMBOL_GPL(tty_register_device_attr); /** * tty_unregister_device - unregister a tty device diff --git a/include/linux/tty.h b/include/linux/tty.h index 9892121354c..599d60347bf 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -412,6 +412,10 @@ extern int tty_register_driver(struct tty_driver *driver); extern int tty_unregister_driver(struct tty_driver *driver); extern struct device *tty_register_device(struct tty_driver *driver, unsigned index, struct device *dev); +extern struct device *tty_register_device_attr(struct tty_driver *driver, + unsigned index, struct device *device, + void *drvdata, + const struct attribute_group **attr_grp); extern void tty_unregister_device(struct tty_driver *driver, unsigned index); extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp, int buflen); From b1b799164afb22711e6bee718f2a5ee669bb9517 Mon Sep 17 00:00:00 2001 From: Tomas Hlavacek Date: Thu, 6 Sep 2012 23:17:47 +0200 Subject: [PATCH 186/235] tty_register_device_attr updated for tty-next Added tty_device_create_release() and bound to dev->release in tty_register_device_attr(). Added tty_port_register_device_attr() and used in uart_add_one_port() instead of tty_register_device_attr(). Signed-off-by: Tomas Hlavacek Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 8 ++++---- drivers/tty/tty_io.c | 7 +++++++ drivers/tty/tty_port.c | 24 ++++++++++++++++++++++++ include/linux/tty.h | 4 ++++ 4 files changed, 39 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index f629bdf2a8c..046279ce3e8 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2313,9 +2313,9 @@ static ssize_t uart_get_attr_uartclk(struct device *dev, struct device_attribute *attr, char *buf) { int ret; - struct tty_port *port = dev_get_drvdata(dev); struct uart_state *state = container_of(port, struct uart_state, port); + mutex_lock(&state->port.mutex); ret = snprintf(buf, PAGE_SIZE, "%d\n", state->uart_port->uartclk); mutex_unlock(&state->port.mutex); @@ -2330,7 +2330,7 @@ static struct attribute *tty_dev_attrs[] = { NULL, }; -static struct attribute_group tty_dev_attr_group = { +static const struct attribute_group tty_dev_attr_group = { .attrs = tty_dev_attrs, }; @@ -2392,8 +2392,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport) * Register the port whether it's detected or not. This allows * setserial to be used to alter this ports parameters. */ - tty_dev = tty_register_device_attr(drv->tty_driver, uport->line, - uport->dev, port, tty_dev_attr_groups); + tty_dev = tty_port_register_device_attr(port, drv->tty_driver, + uport->line, uport->dev, port, tty_dev_attr_groups); if (likely(!IS_ERR(tty_dev))) { device_set_wakeup_capable(tty_dev, 1); } else { diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index dcb30d55d39..8a5a8b06461 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -3045,6 +3045,12 @@ struct device *tty_register_device(struct tty_driver *driver, unsigned index, } EXPORT_SYMBOL(tty_register_device); +static void tty_device_create_release(struct device *dev) +{ + pr_debug("device: '%s': %s\n", dev_name(dev), __func__); + kfree(dev); +} + /** * tty_register_device_attr - register a tty device * @driver: the tty driver that describes the tty device @@ -3103,6 +3109,7 @@ struct device *tty_register_device_attr(struct tty_driver *driver, dev->devt = devt; dev->class = tty_class; dev->parent = device; + dev->release = tty_device_create_release; dev_set_name(dev, "%s", name); dev->groups = attr_grp; dev_set_drvdata(dev, drvdata); diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c index 96302f4c707..d7bdd8d0c23 100644 --- a/drivers/tty/tty_port.c +++ b/drivers/tty/tty_port.c @@ -73,6 +73,30 @@ struct device *tty_port_register_device(struct tty_port *port, } EXPORT_SYMBOL_GPL(tty_port_register_device); +/** + * tty_port_register_device_attr - register tty device + * @port: tty_port of the device + * @driver: tty_driver for this device + * @index: index of the tty + * @device: parent if exists, otherwise NULL + * @drvdata: Driver data to be set to device. + * @attr_grp: Attribute group to be set on device. + * + * It is the same as tty_register_device_attr except the provided @port is + * linked to a concrete tty specified by @index. Use this or tty_port_install + * (or both). Call tty_port_link_device as a last resort. + */ +struct device *tty_port_register_device_attr(struct tty_port *port, + struct tty_driver *driver, unsigned index, + struct device *device, void *drvdata, + const struct attribute_group **attr_grp) +{ + tty_port_link_device(port, driver, index); + return tty_register_device_attr(driver, index, device, drvdata, + attr_grp); +} +EXPORT_SYMBOL_GPL(tty_port_register_device_attr); + int tty_port_alloc_xmit_buf(struct tty_port *port) { /* We may sleep in get_zeroed_page() */ diff --git a/include/linux/tty.h b/include/linux/tty.h index 599d60347bf..1509b86825d 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -507,6 +507,10 @@ extern void tty_port_link_device(struct tty_port *port, extern struct device *tty_port_register_device(struct tty_port *port, struct tty_driver *driver, unsigned index, struct device *device); +extern struct device *tty_port_register_device_attr(struct tty_port *port, + struct tty_driver *driver, unsigned index, + struct device *device, void *drvdata, + const struct attribute_group **attr_grp); extern int tty_port_alloc_xmit_buf(struct tty_port *port); extern void tty_port_free_xmit_buf(struct tty_port *port); extern void tty_port_put(struct tty_port *port); From e36851d0fa94b0f7802b3cc80406dbd3ef4f2f16 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 7 Sep 2012 18:34:19 +0300 Subject: [PATCH 187/235] serial: omap: fix compile breakage when rebasing patches on top of Greg's tty-next, it looks like automerge broke a few things which I didn't catch (for whatever reason I didn't have OMAP Serial enabled on .config) so I ended up breaking the build on Greg's tty-next branch. Fix the breakage by re-adding the three missing members on struct uart_omap_port. Reported-by: Tony Lindgren Signed-off-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- arch/arm/plat-omap/include/plat/omap-serial.h | 4 ---- drivers/tty/serial/omap-serial.c | 4 ++++ 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/arm/plat-omap/include/plat/omap-serial.h b/arch/arm/plat-omap/include/plat/omap-serial.h index 3c9fd3e4263..a531149823b 100644 --- a/arch/arm/plat-omap/include/plat/omap-serial.h +++ b/arch/arm/plat-omap/include/plat/omap-serial.h @@ -105,8 +105,4 @@ struct uart_omap_dma { unsigned int rx_timeout; }; - - int DTR_gpio; - int DTR_inverted; - int DTR_active; #endif /* __OMAP_SERIAL_H__ */ diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index cfd209485af..0a6e78e15a4 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -100,6 +100,10 @@ struct uart_omap_port { u8 wakeups_enabled; unsigned int irq_pending:1; + int DTR_gpio; + int DTR_inverted; + int DTR_active; + struct pm_qos_request pm_qos_request; u32 latency; u32 calc_latency; From ce2f08ded291188b684e3d2e9940132514ada0a9 Mon Sep 17 00:00:00 2001 From: Felipe Balbi Date: Fri, 7 Sep 2012 21:10:33 +0300 Subject: [PATCH 188/235] serial: omap: fix DeviceTree boot OMAP Architecture code, passes a few function pointers for UART driver to use in order to properly implement Power Management and Wakeup capabilities. The problem is that those function pointers, which are passed (ab)using platform_data on non-DT kernels, can't be passed down to drivers through DT. commit e5b57c0 (serial: omap: define helpers for pdata function pointers) failed to take DT kernels into consideration and caused a regression to DT kernel boot. Fix that by (re-)adding a check for valid pdata pointer together with valid pdata->$FUNCTION pointer. Reported-by: Tony Lindgren Signed-off-by: Felipe Balbi Tested-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 20 +++++++++++++------- 1 file changed, 13 insertions(+), 7 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 0a6e78e15a4..743e8e1249d 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -143,7 +143,7 @@ static int serial_omap_get_context_loss_count(struct uart_omap_port *up) { struct omap_uart_port_info *pdata = up->dev->platform_data; - if (!pdata->get_context_loss_count) + if (!pdata || !pdata->get_context_loss_count) return 0; return pdata->get_context_loss_count(up->dev); @@ -153,24 +153,30 @@ static void serial_omap_set_forceidle(struct uart_omap_port *up) { struct omap_uart_port_info *pdata = up->dev->platform_data; - if (pdata->set_forceidle) - pdata->set_forceidle(up->dev); + if (!pdata || !pdata->set_forceidle) + return; + + pdata->set_forceidle(up->dev); } static void serial_omap_set_noidle(struct uart_omap_port *up) { struct omap_uart_port_info *pdata = up->dev->platform_data; - if (pdata->set_noidle) - pdata->set_noidle(up->dev); + if (!pdata || !pdata->set_noidle) + return; + + pdata->set_noidle(up->dev); } static void serial_omap_enable_wakeup(struct uart_omap_port *up, bool enable) { struct omap_uart_port_info *pdata = up->dev->platform_data; - if (pdata->enable_wakeup) - pdata->enable_wakeup(up->dev, enable); + if (!pdata || !pdata->enable_wakeup) + return; + + pdata->enable_wakeup(up->dev, enable); } /* From 3dbc5ce2bffa40ef9a95247f3e9ea0f8874489ac Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Fri, 7 Sep 2012 10:59:40 -0700 Subject: [PATCH 189/235] serial: omap: Request pins using pinctrl framework Request pins using pinctrl framework. Only show a warning on error as some boards set the pins in the bootloader even if CONFIG_PINCTRL is enabled. Signed-off-by: Tony Lindgren Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 743e8e1249d..f175385bb30 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -40,6 +40,7 @@ #include #include #include +#include #include @@ -108,6 +109,7 @@ struct uart_omap_port { u32 latency; u32 calc_latency; struct work_struct qos_work; + struct pinctrl *pins; }; #define to_uart_omap_port(p) ((container_of((p), struct uart_omap_port, port))) @@ -1377,6 +1379,13 @@ static int __devinit serial_omap_probe(struct platform_device *pdev) goto err_port_line; } + up->pins = devm_pinctrl_get_select_default(&pdev->dev); + if (IS_ERR(up->pins)) { + dev_warn(&pdev->dev, "did not get pins for uart%i error: %li\n", + up->port.line, PTR_ERR(up->pins)); + up->pins = NULL; + } + sprintf(up->name, "OMAP UART%d", up->port.line); up->port.mapbase = mem->start; up->port.membase = devm_ioremap(&pdev->dev, mem->start, From 3d39aa6869c3cfc72dccb6c9431ecdb3ad7627ad Mon Sep 17 00:00:00 2001 From: Wei Yongjun Date: Fri, 7 Sep 2012 14:53:49 +0800 Subject: [PATCH 190/235] TTY: serial: move the dereference below the NULL test The dereference should be moved below the NULL test. spatch with a semantic match is used to found this. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/ioc3_serial.c | 3 ++- drivers/tty/serial/ioc4_serial.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/ioc3_serial.c b/drivers/tty/serial/ioc3_serial.c index 758ff310f7f..5ac52898a0b 100644 --- a/drivers/tty/serial/ioc3_serial.c +++ b/drivers/tty/serial/ioc3_serial.c @@ -1120,13 +1120,14 @@ static inline int do_read(struct uart_port *the_port, char *buf, int len) struct ioc3_port *port = get_ioc3_port(the_port); struct ring *inring; struct ring_entry *entry; - struct port_hooks *hooks = port->ip_hooks; + struct port_hooks *hooks; int byte_num; char *sc; int loop_counter; BUG_ON(!(len >= 0)); BUG_ON(!port); + hooks = port->ip_hooks; /* There is a nasty timing issue in the IOC3. When the rx_timer * expires or the rx_high condition arises, we take an interrupt. diff --git a/drivers/tty/serial/ioc4_serial.c b/drivers/tty/serial/ioc4_serial.c index cc5aca78ad9..3e7da10cebb 100644 --- a/drivers/tty/serial/ioc4_serial.c +++ b/drivers/tty/serial/ioc4_serial.c @@ -2069,13 +2069,14 @@ static inline int do_read(struct uart_port *the_port, unsigned char *buf, struct ioc4_port *port = get_ioc4_port(the_port, 0); struct ring *inring; struct ring_entry *entry; - struct hooks *hooks = port->ip_hooks; + struct hooks *hooks; int byte_num; char *sc; int loop_counter; BUG_ON(!(len >= 0)); BUG_ON(!port); + hooks = port->ip_hooks; /* There is a nasty timing issue in the IOC4. When the rx_timer * expires or the rx_high condition arises, we take an interrupt. From fe0ed5b3158b6c5b6e2653348575de8f62f97d27 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 7 Sep 2012 10:02:36 +0200 Subject: [PATCH 191/235] serial: pl011: delete dangling bug flag The bug flag .interrupt_may_hang is not used since commit 4fd0690bb0c3955983560bb2767ee82e2b197f9b "serial: pl011: implement workaround for CTS clear event issue" so delete it. Cc: Rajanikanth H.V Signed-off-by: Linus Walleij Acked-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 05c15ec7bd2..cede9387664 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -77,7 +77,6 @@ struct vendor_data { unsigned int lcrh_tx; unsigned int lcrh_rx; bool oversampling; - bool interrupt_may_hang; /* vendor-specific */ bool dma_threshold; bool cts_event_workaround; }; @@ -98,7 +97,6 @@ static struct vendor_data vendor_st = { .lcrh_tx = ST_UART011_LCRH_TX, .lcrh_rx = ST_UART011_LCRH_RX, .oversampling = true, - .interrupt_may_hang = true, .dma_threshold = true, .cts_event_workaround = true, }; @@ -149,7 +147,6 @@ struct uart_amba_port { unsigned int old_cr; /* state during shutdown */ bool autorts; char type[12]; - bool interrupt_may_hang; /* vendor-specific */ #ifdef CONFIG_DMA_ENGINE /* DMA stuff */ bool using_tx_dma; @@ -1952,7 +1949,6 @@ static int pl011_probe(struct amba_device *dev, const struct amba_id *id) uap->lcrh_tx = vendor->lcrh_tx; uap->old_cr = 0; uap->fifosize = vendor->fifosize; - uap->interrupt_may_hang = vendor->interrupt_may_hang; uap->port.dev = &dev->dev; uap->port.mapbase = dev->res.start; uap->port.membase = base; From 43b5f0d69291374f602ad8e1817f329573a59010 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 7 Sep 2012 10:02:48 +0200 Subject: [PATCH 192/235] serial: pl011: delete reset callback Since commit 4fd0690bb0c3955983560bb2767ee82e2b197f9b "serial: pl011: implement workaround for CTS clear event issue" the PL011 UART is no longer at risk to hang up, so get rid of the callback altogether. Cc: Rajanikanth H.V Signed-off-by: Linus Walleij Acked-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- arch/arm/mach-ux500/board-mop500.c | 21 --------------------- include/linux/amba/serial.h | 1 - 2 files changed, 22 deletions(-) diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c index 8674a890fd1..f216c302beb 100644 --- a/arch/arm/mach-ux500/board-mop500.c +++ b/arch/arm/mach-ux500/board-mop500.c @@ -524,33 +524,12 @@ static struct stedma40_chan_cfg uart2_dma_cfg_tx = { }; #endif -#define PRCC_K_SOFTRST_SET 0x18 -#define PRCC_K_SOFTRST_CLEAR 0x1C -static void ux500_uart0_reset(void) -{ - void __iomem *prcc_rst_set, *prcc_rst_clr; - - prcc_rst_set = (void __iomem *)IO_ADDRESS(U8500_CLKRST1_BASE + - PRCC_K_SOFTRST_SET); - prcc_rst_clr = (void __iomem *)IO_ADDRESS(U8500_CLKRST1_BASE + - PRCC_K_SOFTRST_CLEAR); - - /* Activate soft reset PRCC_K_SOFTRST_CLEAR */ - writel((readl(prcc_rst_clr) | 0x1), prcc_rst_clr); - udelay(1); - - /* Release soft reset PRCC_K_SOFTRST_SET */ - writel((readl(prcc_rst_set) | 0x1), prcc_rst_set); - udelay(1); -} - static struct amba_pl011_data uart0_plat = { #ifdef CONFIG_STE_DMA40 .dma_filter = stedma40_filter, .dma_rx_param = &uart0_dma_cfg_rx, .dma_tx_param = &uart0_dma_cfg_tx, #endif - .reset = ux500_uart0_reset, }; static struct amba_pl011_data uart1_plat = { diff --git a/include/linux/amba/serial.h b/include/linux/amba/serial.h index d117b29d106..f612c783170 100644 --- a/include/linux/amba/serial.h +++ b/include/linux/amba/serial.h @@ -205,7 +205,6 @@ struct amba_pl011_data { void *dma_tx_param; void (*init) (void); void (*exit) (void); - void (*reset) (void); }; #endif From 7b6031a7bcf3b191cf02caa2be6939df9266db40 Mon Sep 17 00:00:00 2001 From: David Brown Date: Fri, 7 Sep 2012 14:45:03 -0700 Subject: [PATCH 193/235] msm_serial: fix clock rate on DMA-based uarts The driver explicitly requests a clock rate for the UART, but it is off by a factor of four from the dividers that it programs into the UART. Fix this by setting the rate to 1/4 of the current value. Signed-off-by: David Brown Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/msm_serial.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/msm_serial.c b/drivers/tty/serial/msm_serial.c index 8131e2c2801..033e0bc9eba 100644 --- a/drivers/tty/serial/msm_serial.c +++ b/drivers/tty/serial/msm_serial.c @@ -896,7 +896,7 @@ static int __init msm_serial_probe(struct platform_device *pdev) return PTR_ERR(msm_port->clk); if (msm_port->is_uartdm) - clk_set_rate(msm_port->clk, 7372800); + clk_set_rate(msm_port->clk, 1843200); port->uartclk = clk_get_rate(msm_port->clk); printk(KERN_INFO "uartclk = %d\n", port->uartclk); From 81732c3b2fede049a692e58a7ceabb6d18ffb18c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jean-Fran=C3=A7ois=20Moine?= Date: Thu, 6 Sep 2012 19:24:13 +0200 Subject: [PATCH 194/235] tty vt: Fix line garbage in virtual console on command line edition MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On some machines using a specific hardware for console screen output, the update of the pixel frame buffer does not work correctly when using command line edition. This may be due to a memory cache bug in the machine on which the problem has been found, but an other solution is possible. This patch proposes to avoid touching directly the pixel frame buffer and to rebuild each character using the standard putc() function on command line edition. The resulting code is smaller and not obviously slower (no read access to the pixel frame buffer). Tested on a Cubox (ARM Marvell Dove 88AP510 SoC). Signed-off-by: Jean-François Moine Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vt/vt.c | 78 ++++++++++----------------------------------- 1 file changed, 17 insertions(+), 61 deletions(-) diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index e07ded30fc7..999ca63afde 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -537,45 +537,27 @@ void complement_pos(struct vc_data *vc, int offset) static void insert_char(struct vc_data *vc, unsigned int nr) { - unsigned short *p, *q = (unsigned short *)vc->vc_pos; + unsigned short *p = (unsigned short *) vc->vc_pos; - p = q + vc->vc_cols - nr - vc->vc_x; - while (--p >= q) - scr_writew(scr_readw(p), p + nr); - scr_memsetw(q, vc->vc_video_erase_char, nr * 2); + scr_memmovew(p + nr, p, vc->vc_cols - vc->vc_x); + scr_memsetw(p, vc->vc_video_erase_char, nr * 2); vc->vc_need_wrap = 0; - if (DO_UPDATE(vc)) { - unsigned short oldattr = vc->vc_attr; - vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x, vc->vc_y, vc->vc_x + nr, 1, - vc->vc_cols - vc->vc_x - nr); - vc->vc_attr = vc->vc_video_erase_char >> 8; - while (nr--) - vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, vc->vc_x + nr); - vc->vc_attr = oldattr; - } + if (DO_UPDATE(vc)) + do_update_region(vc, (unsigned long) p, + (vc->vc_cols - vc->vc_x) / 2 + 1); } static void delete_char(struct vc_data *vc, unsigned int nr) { - unsigned int i = vc->vc_x; - unsigned short *p = (unsigned short *)vc->vc_pos; + unsigned short *p = (unsigned short *) vc->vc_pos; - while (++i <= vc->vc_cols - nr) { - scr_writew(scr_readw(p+nr), p); - p++; - } - scr_memsetw(p, vc->vc_video_erase_char, nr * 2); + scr_memcpyw(p, p + nr, vc->vc_cols - vc->vc_x - nr); + scr_memsetw(p + vc->vc_cols - vc->vc_x - nr, vc->vc_video_erase_char, + nr * 2); vc->vc_need_wrap = 0; - if (DO_UPDATE(vc)) { - unsigned short oldattr = vc->vc_attr; - vc->vc_sw->con_bmove(vc, vc->vc_y, vc->vc_x + nr, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x - nr); - vc->vc_attr = vc->vc_video_erase_char >> 8; - while (nr--) - vc->vc_sw->con_putc(vc, vc->vc_video_erase_char, vc->vc_y, - vc->vc_cols - 1 - nr); - vc->vc_attr = oldattr; - } + if (DO_UPDATE(vc)) + do_update_region(vc, (unsigned long) p, + (vc->vc_cols - vc->vc_x) / 2); } static int softcursor_original; @@ -1172,45 +1154,26 @@ static void csi_J(struct vc_data *vc, int vpar) case 0: /* erase from cursor to end of display */ count = (vc->vc_scr_end - vc->vc_pos) >> 1; start = (unsigned short *)vc->vc_pos; - if (DO_UPDATE(vc)) { - /* do in two stages */ - vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x); - vc->vc_sw->con_clear(vc, vc->vc_y + 1, 0, - vc->vc_rows - vc->vc_y - 1, - vc->vc_cols); - } break; case 1: /* erase from start to cursor */ count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1; start = (unsigned short *)vc->vc_origin; - if (DO_UPDATE(vc)) { - /* do in two stages */ - vc->vc_sw->con_clear(vc, 0, 0, vc->vc_y, - vc->vc_cols); - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_x + 1); - } break; case 3: /* erase scroll-back buffer (and whole display) */ scr_memsetw(vc->vc_screenbuf, vc->vc_video_erase_char, vc->vc_screenbuf_size >> 1); set_origin(vc); - if (CON_IS_VISIBLE(vc)) - update_screen(vc); /* fall through */ case 2: /* erase whole display */ count = vc->vc_cols * vc->vc_rows; start = (unsigned short *)vc->vc_origin; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, 0, 0, - vc->vc_rows, - vc->vc_cols); break; default: return; } scr_memsetw(start, vc->vc_video_erase_char, 2 * count); + if (DO_UPDATE(vc)) + do_update_region(vc, (unsigned long) start, count); vc->vc_need_wrap = 0; } @@ -1223,29 +1186,22 @@ static void csi_K(struct vc_data *vc, int vpar) case 0: /* erase from cursor to end of line */ count = vc->vc_cols - vc->vc_x; start = (unsigned short *)vc->vc_pos; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, vc->vc_x, 1, - vc->vc_cols - vc->vc_x); break; case 1: /* erase from start of line to cursor */ start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); count = vc->vc_x + 1; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_x + 1); break; case 2: /* erase whole line */ start = (unsigned short *)(vc->vc_pos - (vc->vc_x << 1)); count = vc->vc_cols; - if (DO_UPDATE(vc)) - vc->vc_sw->con_clear(vc, vc->vc_y, 0, 1, - vc->vc_cols); break; default: return; } scr_memsetw(start, vc->vc_video_erase_char, 2 * count); vc->vc_need_wrap = 0; + if (DO_UPDATE(vc)) + do_update_region(vc, (unsigned long) start, count); } static void csi_X(struct vc_data *vc, int vpar) /* erase the following vpar positions */ From cdd86b277dc82220aa630414896505517a02a201 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 10 Sep 2012 22:31:04 -0700 Subject: [PATCH 195/235] serial/8250: Limit the omap workarounds to omap1 These workarounds do not apply for CONFIG_ARCH_OMAP2PLUS at all, so let's make it just CONFIG_ARCH_OMAP1. This is needed to for ARM common zImage changes for omap2+ to avoid including plat and mach headers. Signed-off-by: Tony Lindgren Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 44f52c6f15b..d4e0b07cb13 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -2340,7 +2340,7 @@ serial8250_do_set_termios(struct uart_port *port, struct ktermios *termios, serial_port_out(port, UART_EFR, efr); } -#ifdef CONFIG_ARCH_OMAP +#ifdef CONFIG_ARCH_OMAP1 /* Workaround to enable 115200 baud on OMAP1510 internal ports */ if (cpu_is_omap1510() && is_omap_port(up)) { if (baud == 115200) { @@ -2430,7 +2430,7 @@ static unsigned int serial8250_port_size(struct uart_8250_port *pt) { if (pt->port.iotype == UPIO_AU) return 0x1000; -#ifdef CONFIG_ARCH_OMAP +#ifdef CONFIG_ARCH_OMAP1 if (is_omap_port(pt)) return 0x16 << pt->port.regshift; #endif From 23666a74c9f552bc9cfef20ded1b8b29bedb80c6 Mon Sep 17 00:00:00 2001 From: Huang Shijie Date: Tue, 11 Sep 2012 15:30:30 +0800 Subject: [PATCH 196/235] serial: mxs-auart: put the device in the error path The mxs_auart_probe() gets the device by the get_device(). So we should put the device in the error path to balance the device's reference counter. Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/mxs-auart.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c index 68984136bfb..6db3baa39a9 100644 --- a/drivers/tty/serial/mxs-auart.c +++ b/drivers/tty/serial/mxs-auart.c @@ -781,6 +781,7 @@ out_free_irq: auart_port[pdev->id] = NULL; free_irq(s->irq, s); out_free_clk: + put_device(s->dev); clk_put(s->clk); out_free: kfree(s); From d83114e9754cf5deb3424217ff2f10cace1428e3 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 17 Sep 2012 12:03:39 +0100 Subject: [PATCH 197/235] tty: Fix hvc return HVC returns a size of -1 bytes for the write room in some cases. This is bogus and not handled by the tty layer at all. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/hvc/hvc_console.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/hvc/hvc_console.c b/drivers/tty/hvc/hvc_console.c index 7f80f15681c..4a652999380 100644 --- a/drivers/tty/hvc/hvc_console.c +++ b/drivers/tty/hvc/hvc_console.c @@ -558,7 +558,7 @@ static int hvc_write_room(struct tty_struct *tty) struct hvc_struct *hp = tty->driver_data; if (!hp) - return -1; + return 0; return hp->outbuf_size - hp->n_outbuf; } From 41fda9c4d9437846f4ca667e134c6d840f67b9c2 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 17 Sep 2012 12:00:44 +0100 Subject: [PATCH 198/235] tty: serial: max3100: Fix error case We don't want to free a random address if the entry is wrong, cover this and WARN if it ever happens. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/max3100.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/tty/serial/max3100.c b/drivers/tty/serial/max3100.c index 46043c2521c..0f24486be53 100644 --- a/drivers/tty/serial/max3100.c +++ b/drivers/tty/serial/max3100.c @@ -827,14 +827,16 @@ static int __devexit max3100_remove(struct spi_device *spi) /* find out the index for the chip we are removing */ for (i = 0; i < MAX_MAX3100; i++) - if (max3100s[i] == s) + if (max3100s[i] == s) { + dev_dbg(&spi->dev, "%s: removing port %d\n", __func__, i); + uart_remove_one_port(&max3100_uart_driver, &max3100s[i]->port); + kfree(max3100s[i]); + max3100s[i] = NULL; break; + } - dev_dbg(&spi->dev, "%s: removing port %d\n", __func__, i); - uart_remove_one_port(&max3100_uart_driver, &max3100s[i]->port); - kfree(max3100s[i]); - max3100s[i] = NULL; - + WARN_ON(i == MAX_MAX3100); + /* check if this is the last chip we have */ for (i = 0; i < MAX_MAX3100; i++) if (max3100s[i]) { From b6abc90480a6bff2c2ff4904b7ae708f51ce8c03 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 17 Sep 2012 12:01:40 +0100 Subject: [PATCH 199/235] tty: ipwireless: check ppp register worked Otherwise we start trying to use a bogus channel - ungood. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/ipwireless/network.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/tty/ipwireless/network.c b/drivers/tty/ipwireless/network.c index 57c8b481113..d2af155dec8 100644 --- a/drivers/tty/ipwireless/network.c +++ b/drivers/tty/ipwireless/network.c @@ -274,7 +274,12 @@ static void do_go_online(struct work_struct *work_go_online) network->xaccm[0] = ~0U; network->xaccm[3] = 0x60000000U; network->raccm = ~0U; - ppp_register_channel(channel); + if (ppp_register_channel(channel) < 0) { + printk(KERN_ERR IPWIRELESS_PCCARD_NAME + ": unable to register PPP channel\n"); + kfree(channel); + return; + } spin_lock_irqsave(&network->lock, flags); network->ppp_channel = channel; } From 47fdd641ccab534a12052dbbf093865daf114bf4 Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Mon, 17 Sep 2012 12:02:35 +0100 Subject: [PATCH 200/235] tty: n_gsm: Fix incorrect debug display In the trace we print the wrong values for N(R) on an I frame. Correct the mask. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/n_gsm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c index 3e210a430fb..1e8e8ce5595 100644 --- a/drivers/tty/n_gsm.c +++ b/drivers/tty/n_gsm.c @@ -488,7 +488,7 @@ static void gsm_print_packet(const char *hdr, int addr, int cr, default: if (!(control & 0x01)) { pr_cont("I N(S)%d N(R)%d", - (control & 0x0E) >> 1, (control & 0xE) >> 5); + (control & 0x0E) >> 1, (control & 0xE0) >> 5); } else switch (control & 0x0F) { case RR: pr_cont("RR(%d)", (control & 0xE0) >> 5); From e740d8f1a0a23a8fea8fbc5a02013c7410283665 Mon Sep 17 00:00:00 2001 From: Sachin Kamat Date: Wed, 12 Sep 2012 12:00:01 +0530 Subject: [PATCH 201/235] tty: serial: Samsung: Fix return value Return the value returned by the failing function instead of -1 (which does not convey the right error information). Fixes the following smatch warning: drivers/tty/serial/samsung.c:1687 s3c24xx_serial_modinit() info: why not propagate 'ret' from uart_register_driver() instead of -1? Signed-off-by: Sachin Kamat Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index bdaa06f3ab6..8eef1141b81 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1684,7 +1684,7 @@ static int __init s3c24xx_serial_modinit(void) ret = uart_register_driver(&s3c24xx_uart_drv); if (ret < 0) { pr_err("Failed to register Samsung UART driver\n"); - return -1; + return ret; } return platform_driver_register(&samsung_serial_driver); From 8b77562b4f867e4bc0c6effb7dfe3255fc265ad0 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 18 Sep 2012 16:19:27 +0100 Subject: [PATCH 202/235] tty/serial: remove CONFIG_EXPERIMENTAL dependencies As discussed at the kernel summit this year, CONFIG_EXPERIMENTAL means nothing, so let's get rid of it. Cc: Kees Cook Cc: Alan Cox Cc: Benjamin Herrenschmidt Cc: Stefano Stabellini Cc: Stephen Rothwell Cc: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman --- drivers/tty/Kconfig | 11 +++++------ drivers/tty/hvc/Kconfig | 2 +- drivers/tty/serial/Kconfig | 6 +++--- 3 files changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index 830cd62d849..b46c4301b65 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -214,8 +214,8 @@ config CYCLADES If you haven't heard about it, it's safe to say N. config CYZ_INTR - bool "Cyclades-Z interrupt mode operation (EXPERIMENTAL)" - depends on EXPERIMENTAL && CYCLADES + bool "Cyclades-Z interrupt mode operation" + depends on CYCLADES help The Cyclades-Z family of multiport cards allows 2 (two) driver op modes: polling and interrupt. In polling mode, the driver will check @@ -285,7 +285,7 @@ config SYNCLINK_GT config NOZOMI tristate "HSDPA Broadband Wireless Data Card - Globe Trotter" - depends on PCI && EXPERIMENTAL + depends on PCI help If you have a HSDPA driver Broadband Wireless Data Card - Globe Trotter PCMCIA card, say Y here. @@ -294,7 +294,7 @@ config NOZOMI will be called nozomi. config ISI - tristate "Multi-Tech multiport card support (EXPERIMENTAL)" + tristate "Multi-Tech multiport card support" depends on SERIAL_NONSTANDARD && PCI select FW_LOADER help @@ -316,8 +316,7 @@ config N_HDLC here. config N_GSM - tristate "GSM MUX line discipline support (EXPERIMENTAL)" - depends on EXPERIMENTAL + tristate "GSM MUX line discipline support" depends on NET help This line discipline provides support for the GSM MUX protocol and diff --git a/drivers/tty/hvc/Kconfig b/drivers/tty/hvc/Kconfig index 0282a83f51f..f47b734c6a7 100644 --- a/drivers/tty/hvc/Kconfig +++ b/drivers/tty/hvc/Kconfig @@ -76,7 +76,7 @@ config HVC_XEN_FRONTEND config HVC_UDBG bool "udbg based fake hypervisor console" - depends on PPC && EXPERIMENTAL + depends on PPC select HVC_DRIVER default n help diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 26907cf2574..84c6f374f1f 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -693,7 +693,7 @@ config SERIAL_SH_SCI_CONSOLE config SERIAL_SH_SCI_DMA bool "DMA support" - depends on SERIAL_SH_SCI && SH_DMAE && EXPERIMENTAL + depends on SERIAL_SH_SCI && SH_DMAE config SERIAL_PNX8XXX bool "Enable PNX8XXX SoCs' UART Support" @@ -1303,8 +1303,8 @@ config SERIAL_ALTERA_UART_CONSOLE Enable a Altera UART port to be the system console. config SERIAL_IFX6X60 - tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)" - depends on GPIOLIB && SPI && EXPERIMENTAL + tristate "SPI protocol driver for Infineon 6x60 modem" + depends on GPIOLIB && SPI help Support for the IFX6x60 modem devices on Intel MID platforms. From 5de69349ed4c10f43fa6dc6617051d94eee04e6c Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman Date: Tue, 18 Sep 2012 17:17:56 +0100 Subject: [PATCH 203/235] tty/serial: put (EXPERIMENTAL) marking back on N_GSM and SERIAL_IFX6X60 Alan says these are not production ready, and users should be told this, so put the "(EXPERIMENTAL)" marking back in the Kconfig entry string. Reported-by: Alan Cox Cc: Kees Cook Cc: Benjamin Herrenschmidt Cc: Stefano Stabellini Cc: Stephen Rothwell Cc: Konrad Rzeszutek Wilk Signed-off-by: Greg Kroah-Hartman --- drivers/tty/Kconfig | 2 +- drivers/tty/serial/Kconfig | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/Kconfig b/drivers/tty/Kconfig index b46c4301b65..d8e05eeab23 100644 --- a/drivers/tty/Kconfig +++ b/drivers/tty/Kconfig @@ -316,7 +316,7 @@ config N_HDLC here. config N_GSM - tristate "GSM MUX line discipline support" + tristate "GSM MUX line discipline support (EXPERIMENTAL)" depends on NET help This line discipline provides support for the GSM MUX protocol and diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 84c6f374f1f..2a9659dfb74 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -1303,7 +1303,7 @@ config SERIAL_ALTERA_UART_CONSOLE Enable a Altera UART port to be the system console. config SERIAL_IFX6X60 - tristate "SPI protocol driver for Infineon 6x60 modem" + tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)" depends on GPIOLIB && SPI help Support for the IFX6x60 modem devices on Intel MID platforms. From 0b52b74972712479ca285c04452db0d4b9025f80 Mon Sep 17 00:00:00 2001 From: Bill Pemberton Date: Thu, 20 Sep 2012 16:55:27 -0400 Subject: [PATCH 204/235] staging: Add dgrp driver for Digi Realport devices This is based on dgrp-1.9 available from ftp://ftp1.digi.com/support/beta/linux/dgrp/dgrp-1.9.tgz Signed-off-by: Bill Pemberton Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dgrp/Kconfig | 9 + drivers/staging/dgrp/Makefile | 12 + drivers/staging/dgrp/README | 2 + drivers/staging/dgrp/TODO | 7 + drivers/staging/dgrp/dgrp_common.c | 200 ++ drivers/staging/dgrp/dgrp_common.h | 208 ++ drivers/staging/dgrp/dgrp_dpa_ops.c | 556 ++++ drivers/staging/dgrp/dgrp_driver.c | 110 + drivers/staging/dgrp/dgrp_mon_ops.c | 346 +++ drivers/staging/dgrp/dgrp_net_ops.c | 3731 +++++++++++++++++++++++++ drivers/staging/dgrp/dgrp_ports_ops.c | 170 ++ drivers/staging/dgrp/dgrp_specproc.c | 821 ++++++ drivers/staging/dgrp/dgrp_sysfs.c | 555 ++++ drivers/staging/dgrp/dgrp_tty.c | 3331 ++++++++++++++++++++++ drivers/staging/dgrp/digirp.h | 129 + drivers/staging/dgrp/drp.h | 693 +++++ 16 files changed, 10880 insertions(+) create mode 100644 drivers/staging/dgrp/Kconfig create mode 100644 drivers/staging/dgrp/Makefile create mode 100644 drivers/staging/dgrp/README create mode 100644 drivers/staging/dgrp/TODO create mode 100644 drivers/staging/dgrp/dgrp_common.c create mode 100644 drivers/staging/dgrp/dgrp_common.h create mode 100644 drivers/staging/dgrp/dgrp_dpa_ops.c create mode 100644 drivers/staging/dgrp/dgrp_driver.c create mode 100644 drivers/staging/dgrp/dgrp_mon_ops.c create mode 100644 drivers/staging/dgrp/dgrp_net_ops.c create mode 100644 drivers/staging/dgrp/dgrp_ports_ops.c create mode 100644 drivers/staging/dgrp/dgrp_specproc.c create mode 100644 drivers/staging/dgrp/dgrp_sysfs.c create mode 100644 drivers/staging/dgrp/dgrp_tty.c create mode 100644 drivers/staging/dgrp/digirp.h create mode 100644 drivers/staging/dgrp/drp.h diff --git a/drivers/staging/dgrp/Kconfig b/drivers/staging/dgrp/Kconfig new file mode 100644 index 00000000000..39f4bb65ec8 --- /dev/null +++ b/drivers/staging/dgrp/Kconfig @@ -0,0 +1,9 @@ +config DGRP + tristate "Digi Realport driver" + default n + depends on SYSFS + ---help--- + Support for Digi Realport devices. These devices allow you to + access remote serial ports as if they are local tty devices. This + will build the kernel driver, you will still need the userspace + component to make your Realport device work. diff --git a/drivers/staging/dgrp/Makefile b/drivers/staging/dgrp/Makefile new file mode 100644 index 00000000000..d9c3b88d716 --- /dev/null +++ b/drivers/staging/dgrp/Makefile @@ -0,0 +1,12 @@ +obj-$(CONFIG_DGRP) += dgrp.o + +dgrp-y := \ + dgrp_common.o \ + dgrp_dpa_ops.o \ + dgrp_driver.o \ + dgrp_mon_ops.o \ + dgrp_net_ops.o \ + dgrp_ports_ops.o \ + dgrp_specproc.o \ + dgrp_tty.o \ + dgrp_sysfs.o diff --git a/drivers/staging/dgrp/README b/drivers/staging/dgrp/README new file mode 100644 index 00000000000..1d8aaee270e --- /dev/null +++ b/drivers/staging/dgrp/README @@ -0,0 +1,2 @@ +The user space code to work with this driver is located at +https://github.com/wfp5p/dgrp-utils diff --git a/drivers/staging/dgrp/TODO b/drivers/staging/dgrp/TODO new file mode 100644 index 00000000000..63341ade90d --- /dev/null +++ b/drivers/staging/dgrp/TODO @@ -0,0 +1,7 @@ +- Use configfs for config stuff. This will require changes to the + user space code. + +- Check the calls to tty_register_device. In particular, check to see + if there should be some handling for IS_ERR(classp). + +- dgrp_send() and dgrp_receive() could use some refactoring diff --git a/drivers/staging/dgrp/dgrp_common.c b/drivers/staging/dgrp/dgrp_common.c new file mode 100644 index 00000000000..fce74e7fb83 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_common.c @@ -0,0 +1,200 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_common.c + * + * Description: + * + * Definitions of global variables and functions which are either + * shared by the tty, mon, and net drivers; or which cross them + * functionally (like the poller). + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include + +#include "dgrp_common.h" + +/** + * dgrp_carrier -- check for carrier change state and act + * @ch: struct ch_struct * + */ +void dgrp_carrier(struct ch_struct *ch) +{ + struct nd_struct *nd; + + int virt_carrier = 0; + int phys_carrier = 0; + + /* fix case when the tty has already closed. */ + + if (!ch) + return; + nd = ch->ch_nd; + if (!nd) + return; + + /* + * If we are currently waiting to determine the status of the port, + * we don't yet know the state of the modem lines. As a result, + * we ignore state changes when we are waiting for the modem lines + * to be established. We know, as a result of code in dgrp_net_ops, + * that we will be called again immediately following the reception + * of the status message with the true modem status flags in it. + */ + if (ch->ch_expect & RR_STATUS) + return; + + /* + * If CH_HANGUP is set, we gotta keep trying to get all the processes + * that have the port open to close the port. + * So lets just keep sending a hangup every time we get here. + */ + if ((ch->ch_flag & CH_HANGUP) && + (ch->ch_tun.un_open_count > 0)) + tty_hangup(ch->ch_tun.un_tty); + + /* + * Compute the effective state of both the physical and virtual + * senses of carrier. + */ + + if (ch->ch_s_mlast & DM_CD) + phys_carrier = 1; + + if ((ch->ch_s_mlast & DM_CD) || + (ch->ch_digi.digi_flags & DIGI_FORCEDCD) || + (ch->ch_flag & CH_CLOCAL)) + virt_carrier = 1; + + /* + * Test for a VIRTUAL carrier transition to HIGH. + * + * The CH_HANGUP condition is intended to prevent any action + * except for close. As a result, we ignore positive carrier + * transitions during CH_HANGUP. + */ + if (((ch->ch_flag & CH_HANGUP) == 0) && + ((ch->ch_flag & CH_VIRT_CD) == 0) && + (virt_carrier == 1)) { + /* + * When carrier rises, wake any threads waiting + * for carrier in the open routine. + */ + nd->nd_tx_work = 1; + + if (waitqueue_active(&ch->ch_flag_wait)) + wake_up_interruptible(&ch->ch_flag_wait); + } + + /* + * Test for a PHYSICAL transition to low, so long as we aren't + * currently ignoring physical transitions (which is what "virtual + * carrier" indicates). + * + * The transition of the virtual carrier to low really doesn't + * matter... it really only means "ignore carrier state", not + * "make pretend that carrier is there". + */ + if ((virt_carrier == 0) && + ((ch->ch_flag & CH_PHYS_CD) != 0) && + (phys_carrier == 0)) { + /* + * When carrier drops: + * + * Do a Hard Hangup if that is called for. + * + * Drop carrier on all open units. + * + * Flush queues, waking up any task waiting in the + * line discipline. + * + * Send a hangup to the control terminal. + * + * Enable all select calls. + */ + + nd->nd_tx_work = 1; + + ch->ch_flag &= ~(CH_LOW | CH_EMPTY | CH_DRAIN | CH_INPUT); + + if (waitqueue_active(&ch->ch_flag_wait)) + wake_up_interruptible(&ch->ch_flag_wait); + + if (ch->ch_tun.un_open_count > 0) + tty_hangup(ch->ch_tun.un_tty); + + if (ch->ch_pun.un_open_count > 0) + tty_hangup(ch->ch_pun.un_tty); + } + + /* + * Make sure that our cached values reflect the current reality. + */ + if (virt_carrier == 1) + ch->ch_flag |= CH_VIRT_CD; + else + ch->ch_flag &= ~CH_VIRT_CD; + + if (phys_carrier == 1) + ch->ch_flag |= CH_PHYS_CD; + else + ch->ch_flag &= ~CH_PHYS_CD; + +} + +/** + * dgrp_chk_perm() -- check permissions for net device + * @inode: pointer to inode structure for the net communication device + * @op: operation to be tested + * + * The file permissions and ownerships are tested to determine whether + * the operation "op" is permitted on the file pointed to by the inode. + * Returns 0 if the operation is permitted, -EACCESS otherwise + */ +int dgrp_chk_perm(int mode, int op) +{ + if (!current_euid()) + mode >>= 6; + else if (in_egroup_p(0)) + mode >>= 3; + + if ((mode & op & 0007) == op) + return 0; + + if (capable(CAP_SYS_ADMIN)) + return 0; + + return -EACCES; +} + +/* dgrp_chk_perm wrapper for permission call in struct inode_operations */ +int dgrp_inode_permission(struct inode *inode, int op) +{ + return dgrp_chk_perm(inode->i_mode, op); +} diff --git a/drivers/staging/dgrp/dgrp_common.h b/drivers/staging/dgrp/dgrp_common.h new file mode 100644 index 00000000000..05ff338471a --- /dev/null +++ b/drivers/staging/dgrp/dgrp_common.h @@ -0,0 +1,208 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +#ifndef __DGRP_COMMON_H +#define __DGRP_COMMON_H + +#define DIGI_VERSION "1.9-29" + +#include +#include +#include "drp.h" + +#define DGRP_TTIME 100 +#define DGRP_RTIME 100 + +/************************************************************************ + * All global storage allocation. + ************************************************************************/ + +extern int dgrp_rawreadok; /* Allow raw writing of input */ +extern int dgrp_register_cudevices; /* enable legacy cu devices */ +extern int dgrp_register_prdevices; /* enable transparent print devices */ +extern int dgrp_poll_tick; /* Poll interval - in ms */ + +extern struct list_head nd_struct_list; + +struct dgrp_poll_data { + spinlock_t poll_lock; + struct timer_list timer; + int poll_tick; + ulong poll_round; /* Timer rouding factor */ + long node_active_count; +}; + +extern struct dgrp_poll_data dgrp_poll_data; +extern void dgrp_poll_handler(unsigned long arg); + +/* from dgrp_mon_ops.c */ +extern void dgrp_register_mon_hook(struct proc_dir_entry *de); + +/* from dgrp_tty.c */ +extern int dgrp_tty_init(struct nd_struct *nd); +extern void dgrp_tty_uninit(struct nd_struct *nd); + +/* from dgrp_ports_ops.c */ +extern void dgrp_register_ports_hook(struct proc_dir_entry *de); + +/* from dgrp_net_ops.c */ +extern void dgrp_register_net_hook(struct proc_dir_entry *de); + +/* from dgrp_dpa_ops.c */ +extern void dgrp_register_dpa_hook(struct proc_dir_entry *de); +extern void dgrp_dpa_data(struct nd_struct *, int, u8 *, int); + +/* from dgrp_sysfs.c */ +extern void dgrp_create_class_sysfs_files(void); +extern void dgrp_remove_class_sysfs_files(void); + +extern void dgrp_create_node_class_sysfs_files(struct nd_struct *nd); +extern void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd); + +extern void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c); +extern void dgrp_remove_tty_sysfs(struct device *c); + +/* from dgrp_specproc.c */ +/* + * The list of DGRP entries with r/w capabilities. These + * magic numbers are used for identification purposes. + */ +enum { + DGRP_CONFIG = 1, /* Configure portservers */ + DGRP_NETDIR = 2, /* Directory for "net" devices */ + DGRP_MONDIR = 3, /* Directory for "mon" devices */ + DGRP_PORTSDIR = 4, /* Directory for "ports" devices */ + DGRP_INFO = 5, /* Get info. about the running module */ + DGRP_NODEINFO = 6, /* Get info. about the configured nodes */ + DGRP_DPADIR = 7, /* Directory for the "dpa" devices */ +}; + +/* + * Directions for proc handlers + */ +enum { + INBOUND = 1, /* Data being written to kernel */ + OUTBOUND = 2, /* Data being read from the kernel */ +}; + +/** + * dgrp_proc_entry: structure for dgrp proc dirs + * @id: ID number associated with this particular entry. Should be + * unique across all of DGRP. + * @name: text name associated with the /proc entry + * @mode: file access permisssions for the /proc entry + * @child: pointer to table describing a subdirectory for this entry + * @de: pointer to directory entry for this object once registered. Used + * to grab the handle of the object for unregistration + * @excl_sem: semaphore to provide exclusive to struct + * @excl_cnt: counter of current accesses + * + * Each entry in a DGRP proc directory is described with a + * dgrp_proc_entry structure. A collection of these + * entries (in an array) represents the members associated + * with a particular /proc directory, and is referred to + * as a table. All tables are terminated by an entry with + * zeros for every member. + */ +struct dgrp_proc_entry { + int id; /* Integer identifier */ + const char *name; /* ASCII identifier */ + mode_t mode; /* File access permissions */ + struct dgrp_proc_entry *child; /* Child pointer */ + + /* file ops to use, pass NULL to use default */ + struct file_operations *proc_file_ops; + + struct proc_dir_entry *de; /* proc entry pointer */ + struct semaphore excl_sem; /* Protects exclusive access var */ + int excl_cnt; /* Counts number of curr accesses */ +}; + +extern void dgrp_unregister_proc(void); +extern void dgrp_register_proc(void); + +/*-----------------------------------------------------------------------* + * + * Declarations for common operations: + * + * (either used by more than one of net, mon, or tty, + * or in interrupt context (i.e. the poller)) + * + *-----------------------------------------------------------------------*/ + +void dgrp_carrier(struct ch_struct *ch); +extern int dgrp_inode_permission(struct inode *inode, int op); +extern int dgrp_chk_perm(int mode, int op); + + +/* + * ID manipulation macros (where c1 & c2 are characters, i is + * a long integer, and s is a character array of at least three members + */ + +static inline void ID_TO_CHAR(long i, char *s) +{ + s[0] = ((i & 0xff00)>>8); + s[1] = (i & 0xff); + s[2] = 0; +} + +static inline long CHAR_TO_ID(char *s) +{ + return ((s[0] & 0xff) << 8) | (s[1] & 0xff); +} + +static inline struct nd_struct *nd_struct_get(long major) +{ + struct nd_struct *nd; + + list_for_each_entry(nd, &nd_struct_list, list) { + if (major == nd->nd_major) + return nd; + } + + return NULL; +} + +static inline int nd_struct_add(struct nd_struct *entry) +{ + struct nd_struct *ptr; + + ptr = nd_struct_get(entry->nd_major); + + if (ptr) + return -EBUSY; + + list_add_tail(&entry->list, &nd_struct_list); + + return 0; +} + +static inline int nd_struct_del(struct nd_struct *entry) +{ + struct nd_struct *nd; + + nd = nd_struct_get(entry->nd_major); + + if (!nd) + return -ENODEV; + + list_del(&nd->list); + return 0; +} + +#endif /* __DGRP_COMMON_H */ diff --git a/drivers/staging/dgrp/dgrp_dpa_ops.c b/drivers/staging/dgrp/dgrp_dpa_ops.c new file mode 100644 index 00000000000..49e670915e5 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_dpa_ops.c @@ -0,0 +1,556 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_dpa_ops.c + * + * Description: + * + * Handle the file operations required for the "dpa" devices. + * Includes those functions required to register the "dpa" devices + * in "/proc". + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include "dgrp_common.h" + +/* File operation declarations */ +static int dgrp_dpa_open(struct inode *, struct file *); +static int dgrp_dpa_release(struct inode *, struct file *); +static ssize_t dgrp_dpa_read(struct file *, char __user *, size_t, loff_t *); +static long dgrp_dpa_ioctl(struct file *file, unsigned int cmd, + unsigned long arg); +static unsigned int dgrp_dpa_select(struct file *, struct poll_table_struct *); + +static const struct file_operations dpa_ops = { + .owner = THIS_MODULE, + .read = dgrp_dpa_read, + .poll = dgrp_dpa_select, + .unlocked_ioctl = dgrp_dpa_ioctl, + .open = dgrp_dpa_open, + .release = dgrp_dpa_release, +}; + +static struct inode_operations dpa_inode_ops = { + .permission = dgrp_inode_permission +}; + + + +struct digi_node { + uint nd_state; /* Node state: 1 = up, 0 = down. */ + uint nd_chan_count; /* Number of channels found */ + uint nd_tx_byte; /* Tx data count */ + uint nd_rx_byte; /* RX data count */ + u8 nd_ps_desc[MAX_DESC_LEN]; /* Description from PS */ +}; + +#define DIGI_GETNODE (('d'<<8) | 249) /* get board info */ + + +struct digi_chan { + uint ch_port; /* Port number to get info on */ + uint ch_open; /* 1 if open, 0 if not */ + uint ch_txcount; /* TX data count */ + uint ch_rxcount; /* RX data count */ + uint ch_s_brate; /* Realport BRATE */ + uint ch_s_estat; /* Realport ELAST */ + uint ch_s_cflag; /* Realport CFLAG */ + uint ch_s_iflag; /* Realport IFLAG */ + uint ch_s_oflag; /* Realport OFLAG */ + uint ch_s_xflag; /* Realport XFLAG */ + uint ch_s_mstat; /* Realport MLAST */ +}; + +#define DIGI_GETCHAN (('d'<<8) | 248) /* get channel info */ + + +struct digi_vpd { + int vpd_len; + char vpd_data[VPDSIZE]; +}; + +#define DIGI_GETVPD (('d'<<8) | 246) /* get VPD info */ + + +struct digi_debug { + int onoff; + int port; +}; + +#define DIGI_SETDEBUG (('d'<<8) | 247) /* set debug info */ + + +void dgrp_register_dpa_hook(struct proc_dir_entry *de) +{ + struct nd_struct *node = de->data; + + de->proc_iops = &dpa_inode_ops; + de->proc_fops = &dpa_ops; + + node->nd_dpa_de = de; + spin_lock_init(&node->nd_dpa_lock); +} + +/* + * dgrp_dpa_open -- open the DPA device for a particular PortServer + */ +static int dgrp_dpa_open(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + int rtn = 0; + + struct proc_dir_entry *de; + + rtn = try_module_get(THIS_MODULE); + if (!rtn) + return -ENXIO; + + rtn = 0; + + if (!capable(CAP_SYS_ADMIN)) { + rtn = -EPERM; + goto done; + } + + /* + * Make sure that the "private_data" field hasn't already been used. + */ + if (file->private_data) { + rtn = -EINVAL; + goto done; + } + + /* + * Get the node pointer, and fail if it doesn't exist. + */ + de = PDE(inode); + if (!de) { + rtn = -ENXIO; + goto done; + } + nd = (struct nd_struct *)de->data; + if (!nd) { + rtn = -ENXIO; + goto done; + } + + file->private_data = (void *) nd; + + /* + * Allocate the DPA buffer. + */ + + if (nd->nd_dpa_buf) { + rtn = -EBUSY; + } else { + nd->nd_dpa_buf = kmalloc(DPA_MAX, GFP_KERNEL); + + if (!nd->nd_dpa_buf) { + rtn = -ENOMEM; + } else { + nd->nd_dpa_out = 0; + nd->nd_dpa_in = 0; + nd->nd_dpa_lbolt = jiffies; + } + } + +done: + + if (rtn) + module_put(THIS_MODULE); + return rtn; +} + +/* + * dgrp_dpa_release -- close the DPA device for a particular PortServer + */ +static int dgrp_dpa_release(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + u8 *buf; + unsigned long lock_flags; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + goto done; + + /* + * Free the dpa buffer. + */ + + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + + buf = nd->nd_dpa_buf; + + nd->nd_dpa_buf = NULL; + nd->nd_dpa_out = nd->nd_dpa_in; + + /* + * Wakeup any thread waiting for buffer space. + */ + + if (nd->nd_dpa_flag & DPA_WAIT_SPACE) { + nd->nd_dpa_flag &= ~DPA_WAIT_SPACE; + wake_up_interruptible(&nd->nd_dpa_wqueue); + } + + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + + kfree(buf); + +done: + module_put(THIS_MODULE); + file->private_data = NULL; + return 0; +} + +/* + * dgrp_dpa_read + * + * Copy data from the monitoring buffer to the user, freeing space + * in the monitoring buffer for more messages + */ +static ssize_t dgrp_dpa_read(struct file *file, char __user *buf, size_t count, + loff_t *ppos) +{ + struct nd_struct *nd; + int n; + int r; + int offset = 0; + int res = 0; + ssize_t rtn; + unsigned long lock_flags; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + return -ENXIO; + + /* + * Wait for some data to appear in the buffer. + */ + + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + + for (;;) { + n = (nd->nd_dpa_in - nd->nd_dpa_out) & DPA_MASK; + + if (n != 0) + break; + + nd->nd_dpa_flag |= DPA_WAIT_DATA; + + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + + /* + * Go to sleep waiting until the condition becomes true. + */ + rtn = wait_event_interruptible(nd->nd_dpa_wqueue, + ((nd->nd_dpa_flag & DPA_WAIT_DATA) == 0)); + + if (rtn) + return rtn; + + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + } + + /* + * Read whatever is there. + */ + + if (n > count) + n = count; + + res = n; + + r = DPA_MAX - nd->nd_dpa_out; + + if (r <= n) { + + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + rtn = copy_to_user((void __user *)buf, + nd->nd_dpa_buf + nd->nd_dpa_out, r); + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + + if (rtn) { + rtn = -EFAULT; + goto done; + } + + nd->nd_dpa_out = 0; + n -= r; + offset = r; + } + + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + rtn = copy_to_user((void __user *)buf + offset, + nd->nd_dpa_buf + nd->nd_dpa_out, n); + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + + if (rtn) { + rtn = -EFAULT; + goto done; + } + + nd->nd_dpa_out += n; + + *ppos += res; + + rtn = res; + + /* + * Wakeup any thread waiting for buffer space. + */ + + n = (nd->nd_dpa_in - nd->nd_dpa_out) & DPA_MASK; + + if (nd->nd_dpa_flag & DPA_WAIT_SPACE && + (DPA_MAX - n) > DPA_HIGH_WATER) { + nd->nd_dpa_flag &= ~DPA_WAIT_SPACE; + wake_up_interruptible(&nd->nd_dpa_wqueue); + } + + done: + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + return rtn; +} + +static unsigned int dgrp_dpa_select(struct file *file, + struct poll_table_struct *table) +{ + unsigned int retval = 0; + struct nd_struct *nd = file->private_data; + + if (nd->nd_dpa_out != nd->nd_dpa_in) + retval |= POLLIN | POLLRDNORM; /* Conditionally readable */ + + retval |= POLLOUT | POLLWRNORM; /* Always writeable */ + + return retval; +} + +static long dgrp_dpa_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + + struct nd_struct *nd; + struct digi_chan getchan; + struct digi_node getnode; + struct ch_struct *ch; + struct digi_debug setdebug; + struct digi_vpd vpd; + unsigned int port; + void __user *uarg = (void __user *) arg; + + nd = file->private_data; + + switch (cmd) { + case DIGI_GETCHAN: + if (copy_from_user(&getchan, uarg, sizeof(struct digi_chan))) + return -EFAULT; + + port = getchan.ch_port; + + if (port < 0 || port > nd->nd_chan_count) + return -EINVAL; + + ch = nd->nd_chan + port; + + getchan.ch_open = (ch->ch_open_count > 0) ? 1 : 0; + getchan.ch_txcount = ch->ch_txcount; + getchan.ch_rxcount = ch->ch_rxcount; + getchan.ch_s_brate = ch->ch_s_brate; + getchan.ch_s_estat = ch->ch_s_elast; + getchan.ch_s_cflag = ch->ch_s_cflag; + getchan.ch_s_iflag = ch->ch_s_iflag; + getchan.ch_s_oflag = ch->ch_s_oflag; + getchan.ch_s_xflag = ch->ch_s_xflag; + getchan.ch_s_mstat = ch->ch_s_mlast; + + if (copy_to_user(uarg, &getchan, sizeof(struct digi_chan))) + return -EFAULT; + break; + + + case DIGI_GETNODE: + getnode.nd_state = (nd->nd_state & NS_READY) ? 1 : 0; + getnode.nd_chan_count = nd->nd_chan_count; + getnode.nd_tx_byte = nd->nd_tx_byte; + getnode.nd_rx_byte = nd->nd_rx_byte; + + memset(&getnode.nd_ps_desc, 0, MAX_DESC_LEN); + strncpy(getnode.nd_ps_desc, nd->nd_ps_desc, MAX_DESC_LEN); + + if (copy_to_user(uarg, &getnode, sizeof(struct digi_node))) + return -EFAULT; + break; + + + case DIGI_SETDEBUG: + if (copy_from_user(&setdebug, uarg, sizeof(struct digi_debug))) + return -EFAULT; + + nd->nd_dpa_debug = setdebug.onoff; + nd->nd_dpa_port = setdebug.port; + break; + + + case DIGI_GETVPD: + if (nd->nd_vpd_len > 0) { + vpd.vpd_len = nd->nd_vpd_len; + memcpy(&vpd.vpd_data, &nd->nd_vpd, nd->nd_vpd_len); + } else { + vpd.vpd_len = 0; + } + + if (copy_to_user(uarg, &vpd, sizeof(struct digi_vpd))) + return -EFAULT; + break; + } + + return 0; +} + +/** + * dgrp_dpa() -- send data to the device monitor queue + * @nd: pointer to a node structure + * @buf: buffer of data to copy to the monitoring buffer + * @len: number of bytes to transfer to the buffer + * + * Called by the net device routines to send data to the device + * monitor queue. If the device monitor buffer is too full to + * accept the data, it waits until the buffer is ready. + */ +static void dgrp_dpa(struct nd_struct *nd, u8 *buf, int nbuf) +{ + int n; + int r; + unsigned long lock_flags; + + /* + * Grab DPA lock. + */ + spin_lock_irqsave(&nd->nd_dpa_lock, lock_flags); + + /* + * Loop while data remains. + */ + while (nbuf > 0 && nd->nd_dpa_buf != NULL) { + + n = (nd->nd_dpa_out - nd->nd_dpa_in - 1) & DPA_MASK; + + /* + * Enforce flow control on the DPA device. + */ + if (n < (DPA_MAX - DPA_HIGH_WATER)) + nd->nd_dpa_flag |= DPA_WAIT_SPACE; + + /* + * This should never happen, as the flow control above + * should have stopped things before they got to this point. + */ + if (n == 0) { + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); + return; + } + + /* + * Copy as much data as will fit. + */ + + if (n > nbuf) + n = nbuf; + + r = DPA_MAX - nd->nd_dpa_in; + + if (r <= n) { + memcpy(nd->nd_dpa_buf + nd->nd_dpa_in, buf, r); + + n -= r; + + nd->nd_dpa_in = 0; + + buf += r; + nbuf -= r; + } + + memcpy(nd->nd_dpa_buf + nd->nd_dpa_in, buf, n); + + nd->nd_dpa_in += n; + + buf += n; + nbuf -= n; + + if (nd->nd_dpa_in >= DPA_MAX) + pr_info_ratelimited("%s - nd->nd_dpa_in (%i) >= DPA_MAX\n", + __func__, nd->nd_dpa_in); + + /* + * Wakeup any thread waiting for data + */ + if (nd->nd_dpa_flag & DPA_WAIT_DATA) { + nd->nd_dpa_flag &= ~DPA_WAIT_DATA; + wake_up_interruptible(&nd->nd_dpa_wqueue); + } + } + + /* + * Release the DPA lock. + */ + spin_unlock_irqrestore(&nd->nd_dpa_lock, lock_flags); +} + +/** + * dgrp_monitor_data() -- builds a DPA data packet + * @nd: pointer to a node structure + * @type: type of message to be logged in the DPA buffer + * @buf: buffer of data to be logged in the DPA buffer + * @size -- number of bytes in the "buf" buffer + */ +void dgrp_dpa_data(struct nd_struct *nd, int type, u8 *buf, int size) +{ + u8 header[5]; + + header[0] = type; + + put_unaligned_be32(size, header + 1); + + dgrp_dpa(nd, header, sizeof(header)); + dgrp_dpa(nd, buf, size); +} diff --git a/drivers/staging/dgrp/dgrp_driver.c b/drivers/staging/dgrp/dgrp_driver.c new file mode 100644 index 00000000000..6e4a0ebc074 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_driver.c @@ -0,0 +1,110 @@ +/* + * + * Copyright 1999-2003 Digi International (www.digi.com) + * Jeff Randall + * James Puzzo + * Scott Kilau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * Driver specific includes + */ +#include +#include +#include +#include + +/* + * PortServer includes + */ +#include "dgrp_common.h" + + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Digi International, http://www.digi.com"); +MODULE_DESCRIPTION("RealPort driver for Digi's ethernet-based serial connectivity product line"); +MODULE_VERSION(DIGI_VERSION); + +struct list_head nd_struct_list; +struct dgrp_poll_data dgrp_poll_data; + +int dgrp_rawreadok = 1; /* Bypass flipbuf on input */ +int dgrp_register_cudevices = 1;/* Turn on/off registering legacy cu devices */ +int dgrp_register_prdevices = 1;/* Turn on/off registering transparent print */ +int dgrp_poll_tick = 20; /* Poll interval - in ms */ + +module_param_named(rawreadok, dgrp_rawreadok, int, 0644); +MODULE_PARM_DESC(rawreadok, "Bypass flip buffers on input"); + +module_param_named(register_cudevices, dgrp_register_cudevices, int, 0644); +MODULE_PARM_DESC(register_cudevices, "Turn on/off registering legacy cu devices"); + +module_param_named(register_prdevices, dgrp_register_prdevices, int, 0644); +MODULE_PARM_DESC(register_prdevices, "Turn on/off registering transparent print devices"); + +module_param_named(pollrate, dgrp_poll_tick, int, 0644); +MODULE_PARM_DESC(pollrate, "Poll interval in ms"); + +/* Driver load/unload functions */ +static int dgrp_init_module(void); +static void dgrp_cleanup_module(void); + +module_init(dgrp_init_module); +module_exit(dgrp_cleanup_module); + +/* + * init_module() + * + * Module load. This is where it all starts. + */ +static int dgrp_init_module(void) +{ + INIT_LIST_HEAD(&nd_struct_list); + + spin_lock_init(&dgrp_poll_data.poll_lock); + init_timer(&dgrp_poll_data.timer); + dgrp_poll_data.poll_tick = dgrp_poll_tick; + dgrp_poll_data.timer.function = dgrp_poll_handler; + dgrp_poll_data.timer.data = (unsigned long) &dgrp_poll_data; + + dgrp_create_class_sysfs_files(); + + dgrp_register_proc(); + + return 0; +} + + +/* + * Module unload. This is where it all ends. + */ +static void dgrp_cleanup_module(void) +{ + struct nd_struct *nd, *next; + + /* + * Attempting to free resources in backwards + * order of allocation, in case that helps + * memory pool fragmentation. + */ + dgrp_unregister_proc(); + + dgrp_remove_class_sysfs_files(); + + + list_for_each_entry_safe(nd, next, &nd_struct_list, list) { + dgrp_tty_uninit(nd); + kfree(nd); + } +} diff --git a/drivers/staging/dgrp/dgrp_mon_ops.c b/drivers/staging/dgrp/dgrp_mon_ops.c new file mode 100644 index 00000000000..268dcb95204 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_mon_ops.c @@ -0,0 +1,346 @@ +/***************************************************************************** + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_mon_ops.c + * + * Description: + * + * Handle the file operations required for the "monitor" devices. + * Includes those functions required to register the "mon" devices + * in "/proc". + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include +#include + +#include "dgrp_common.h" + +/* File operation declarations */ +static int dgrp_mon_open(struct inode *, struct file *); +static int dgrp_mon_release(struct inode *, struct file *); +static ssize_t dgrp_mon_read(struct file *, char __user *, size_t, loff_t *); +static long dgrp_mon_ioctl(struct file *file, unsigned int cmd, + unsigned long arg); + +static const struct file_operations mon_ops = { + .owner = THIS_MODULE, + .read = dgrp_mon_read, + .unlocked_ioctl = dgrp_mon_ioctl, + .open = dgrp_mon_open, + .release = dgrp_mon_release, +}; + +static struct inode_operations mon_inode_ops = { + .permission = dgrp_inode_permission +}; + +void dgrp_register_mon_hook(struct proc_dir_entry *de) +{ + struct nd_struct *node = de->data; + + de->proc_iops = &mon_inode_ops; + de->proc_fops = &mon_ops; + node->nd_mon_de = de; + sema_init(&node->nd_mon_semaphore, 1); +} + +/** + * dgrp_mon_open() -- open /proc/dgrp/ports device for a PortServer + * @inode: struct inode * + * @file: struct file * + * + * Open function to open the /proc/dgrp/ports device for a PortServer. + */ +static int dgrp_mon_open(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + struct proc_dir_entry *de; + struct timeval tv; + uint32_t time; + u8 *buf; + int rtn; + + rtn = try_module_get(THIS_MODULE); + if (!rtn) + return -ENXIO; + + rtn = 0; + + if (!capable(CAP_SYS_ADMIN)) { + rtn = -EPERM; + goto done; + } + + /* + * Make sure that the "private_data" field hasn't already been used. + */ + if (file->private_data) { + rtn = -EINVAL; + goto done; + } + + /* + * Get the node pointer, and fail if it doesn't exist. + */ + de = PDE(inode); + if (!de) { + rtn = -ENXIO; + goto done; + } + + nd = (struct nd_struct *)de->data; + if (!nd) { + rtn = -ENXIO; + goto done; + } + + file->private_data = (void *) nd; + + /* + * Allocate the monitor buffer. + */ + + /* + * Grab the MON lock. + */ + down(&nd->nd_mon_semaphore); + + if (nd->nd_mon_buf) { + rtn = -EBUSY; + goto done_up; + } + + nd->nd_mon_buf = kmalloc(MON_MAX, GFP_KERNEL); + + if (!nd->nd_mon_buf) { + rtn = -ENOMEM; + goto done_up; + } + + /* + * Enter an RPDUMP file header into the buffer. + */ + + buf = nd->nd_mon_buf; + + strcpy(buf, RPDUMP_MAGIC); + buf += strlen(buf) + 1; + + do_gettimeofday(&tv); + + /* + * tv.tv_sec might be a 64 bit quantity. Pare + * it down to 32 bits before attempting to encode + * it. + */ + time = (uint32_t) (tv.tv_sec & 0xffffffff); + + put_unaligned_be32(time, buf); + put_unaligned_be16(0, buf + 4); + buf += 6; + + if (nd->nd_tx_module) { + buf[0] = RPDUMP_CLIENT; + put_unaligned_be32(0, buf + 1); + put_unaligned_be16(1, buf + 5); + buf[7] = 0xf0 + nd->nd_tx_module; + buf += 8; + } + + if (nd->nd_rx_module) { + buf[0] = RPDUMP_SERVER; + put_unaligned_be32(0, buf + 1); + put_unaligned_be16(1, buf + 5); + buf[7] = 0xf0 + nd->nd_rx_module; + buf += 8; + } + + nd->nd_mon_out = 0; + nd->nd_mon_in = buf - nd->nd_mon_buf; + nd->nd_mon_lbolt = jiffies; + +done_up: + up(&nd->nd_mon_semaphore); + +done: + if (rtn) + module_put(THIS_MODULE); + return rtn; +} + + +/** + * dgrp_mon_release() - Close the MON device for a particular PortServer + * @inode: struct inode * + * @file: struct file * + */ +static int dgrp_mon_release(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + goto done; + + /* + * Free the monitor buffer. + */ + + down(&nd->nd_mon_semaphore); + + kfree(nd->nd_mon_buf); + nd->nd_mon_buf = NULL; + nd->nd_mon_out = nd->nd_mon_in; + + /* + * Wakeup any thread waiting for buffer space. + */ + + if (nd->nd_mon_flag & MON_WAIT_SPACE) { + nd->nd_mon_flag &= ~MON_WAIT_SPACE; + wake_up_interruptible(&nd->nd_mon_wqueue); + } + + up(&nd->nd_mon_semaphore); + + /* + * Make sure there is no thread in the middle of writing a packet. + */ + down(&nd->nd_net_semaphore); + up(&nd->nd_net_semaphore); + +done: + module_put(THIS_MODULE); + file->private_data = NULL; + return 0; +} + +/** + * dgrp_mon_read() -- Copy data from the monitoring buffer to the user + */ +static ssize_t dgrp_mon_read(struct file *file, char __user *buf, size_t count, + loff_t *ppos) +{ + struct nd_struct *nd; + int r; + int offset = 0; + int res = 0; + ssize_t rtn; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + return -ENXIO; + + /* + * Wait for some data to appear in the buffer. + */ + + down(&nd->nd_mon_semaphore); + + for (;;) { + res = (nd->nd_mon_in - nd->nd_mon_out) & MON_MASK; + + if (res) + break; + + nd->nd_mon_flag |= MON_WAIT_DATA; + + up(&nd->nd_mon_semaphore); + + /* + * Go to sleep waiting until the condition becomes true. + */ + rtn = wait_event_interruptible(nd->nd_mon_wqueue, + ((nd->nd_mon_flag & MON_WAIT_DATA) == 0)); + + if (rtn) + return rtn; + + down(&nd->nd_mon_semaphore); + } + + /* + * Read whatever is there. + */ + + if (res > count) + res = count; + + r = MON_MAX - nd->nd_mon_out; + + if (r <= res) { + rtn = copy_to_user((void __user *)buf, + nd->nd_mon_buf + nd->nd_mon_out, r); + if (rtn) { + up(&nd->nd_mon_semaphore); + return -EFAULT; + } + + nd->nd_mon_out = 0; + res -= r; + offset = r; + } + + rtn = copy_to_user((void __user *) buf + offset, + nd->nd_mon_buf + nd->nd_mon_out, res); + if (rtn) { + up(&nd->nd_mon_semaphore); + return -EFAULT; + } + + nd->nd_mon_out += res; + + *ppos += res; + + up(&nd->nd_mon_semaphore); + + /* + * Wakeup any thread waiting for buffer space. + */ + + if (nd->nd_mon_flag & MON_WAIT_SPACE) { + nd->nd_mon_flag &= ~MON_WAIT_SPACE; + wake_up_interruptible(&nd->nd_mon_wqueue); + } + + return res; +} + +/* ioctl is not valid on monitor device */ +static long dgrp_mon_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + return -EINVAL; +} diff --git a/drivers/staging/dgrp/dgrp_net_ops.c b/drivers/staging/dgrp/dgrp_net_ops.c new file mode 100644 index 00000000000..d9d6b6709e4 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_net_ops.c @@ -0,0 +1,3731 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_net_ops.c + * + * Description: + * + * Handle the file operations required for the "network" devices. + * Includes those functions required to register the "net" devices + * in "/proc". + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MYFLIPLEN TBUF_MAX + +#include "dgrp_common.h" + +#define TTY_FLIPBUF_SIZE 512 +#define DEVICE_NAME_SIZE 50 + +/* + * Generic helper function declarations + */ +static void parity_scan(struct ch_struct *ch, unsigned char *cbuf, + unsigned char *fbuf, int *len); + +/* + * File operation declarations + */ +static int dgrp_net_open(struct inode *, struct file *); +static int dgrp_net_release(struct inode *, struct file *); +static ssize_t dgrp_net_read(struct file *, char __user *, size_t, loff_t *); +static ssize_t dgrp_net_write(struct file *, const char __user *, size_t, + loff_t *); +static long dgrp_net_ioctl(struct file *file, unsigned int cmd, + unsigned long arg); +static unsigned int dgrp_net_select(struct file *file, + struct poll_table_struct *table); + +static const struct file_operations net_ops = { + .owner = THIS_MODULE, + .read = dgrp_net_read, + .write = dgrp_net_write, + .poll = dgrp_net_select, + .unlocked_ioctl = dgrp_net_ioctl, + .open = dgrp_net_open, + .release = dgrp_net_release, +}; + +static struct inode_operations net_inode_ops = { + .permission = dgrp_inode_permission +}; + +void dgrp_register_net_hook(struct proc_dir_entry *de) +{ + struct nd_struct *node = de->data; + + de->proc_iops = &net_inode_ops; + de->proc_fops = &net_ops; + node->nd_net_de = de; + sema_init(&node->nd_net_semaphore, 1); + node->nd_state = NS_CLOSED; + dgrp_create_node_class_sysfs_files(node); +} + + +/** + * dgrp_dump() -- prints memory for debugging purposes. + * @mem: Memory location which should be printed to the console + * @len: Number of bytes to be dumped + */ +static void dgrp_dump(u8 *mem, int len) +{ + int i; + + pr_debug("dgrp dump length = %d, data = ", len); + for (i = 0; i < len; ++i) + pr_debug("%.2x ", mem[i]); + pr_debug("\n"); +} + +/** + * dgrp_read_data_block() -- Read a data block + * @ch: struct ch_struct * + * @flipbuf: u8 * + * @flipbuf_size: size of flipbuf + */ +static void dgrp_read_data_block(struct ch_struct *ch, u8 *flipbuf, + int flipbuf_size) +{ + int t; + int n; + + if (flipbuf_size <= 0) + return; + + t = RBUF_MAX - ch->ch_rout; + n = flipbuf_size; + + if (n >= t) { + memcpy(flipbuf, ch->ch_rbuf + ch->ch_rout, t); + flipbuf += t; + n -= t; + ch->ch_rout = 0; + } + + memcpy(flipbuf, ch->ch_rbuf + ch->ch_rout, n); + flipbuf += n; + ch->ch_rout += n; +} + + +/** + * dgrp_input() -- send data to the line disipline + * @ch: pointer to channel struct + * + * Copys the rbuf to the flipbuf and sends to line discipline. + * Sends input buffer data to the line discipline. + * + * There are several modes to consider here: + * rawreadok, tty->real_raw, and IF_PARMRK + */ +static void dgrp_input(struct ch_struct *ch) +{ + struct nd_struct *nd; + struct tty_struct *tty; + int remain; + int data_len; + int len; + int flip_len; + int tty_count; + ulong lock_flags; + struct tty_ldisc *ld; + u8 *myflipbuf; + u8 *myflipflagbuf; + + if (!ch) + return; + + nd = ch->ch_nd; + + if (!nd) + return; + + spin_lock_irqsave(&nd->nd_lock, lock_flags); + + myflipbuf = nd->nd_inputbuf; + myflipflagbuf = nd->nd_inputflagbuf; + + if (!ch->ch_open_count) { + ch->ch_rout = ch->ch_rin; + goto out; + } + + if (ch->ch_tun.un_flag & UN_CLOSING) { + ch->ch_rout = ch->ch_rin; + goto out; + } + + tty = (ch->ch_tun).un_tty; + + + if (!tty || tty->magic != TTY_MAGIC) { + ch->ch_rout = ch->ch_rin; + goto out; + } + + tty_count = tty->count; + if (!tty_count) { + ch->ch_rout = ch->ch_rin; + goto out; + } + + if (tty->closing || test_bit(TTY_CLOSING, &tty->flags)) { + ch->ch_rout = ch->ch_rin; + goto out; + } + + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + + /* Decide how much data we can send into the tty layer */ + if (dgrp_rawreadok && tty->real_raw) + flip_len = MYFLIPLEN; + else + flip_len = TTY_FLIPBUF_SIZE; + + /* data_len should be the number of chars that we read in */ + data_len = (ch->ch_rin - ch->ch_rout) & RBUF_MASK; + remain = data_len; + + /* len is the amount of data we are going to transfer here */ + len = min(data_len, flip_len); + + /* take into consideration length of ldisc */ + len = min(len, (N_TTY_BUF_SIZE - 1) - tty->read_cnt); + + ld = tty_ldisc_ref(tty); + + /* + * If we were unable to get a reference to the ld, + * don't flush our buffer, and act like the ld doesn't + * have any space to put the data right now. + */ + if (!ld) { + len = 0; + } else if (!ld->ops->receive_buf) { + spin_lock_irqsave(&nd->nd_lock, lock_flags); + ch->ch_rout = ch->ch_rin; + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + len = 0; + } + + /* Check DPA flow control */ + if ((nd->nd_dpa_debug) && + (nd->nd_dpa_flag & DPA_WAIT_SPACE) && + (nd->nd_dpa_port == MINOR(tty_devnum(ch->ch_tun.un_tty)))) + len = 0; + + if ((len) && !(ch->ch_flag & CH_RXSTOP)) { + + dgrp_read_data_block(ch, myflipbuf, len); + + /* + * In high performance mode, we don't have to update + * flag_buf or any of the counts or pointers into flip buf. + */ + if (!dgrp_rawreadok || !tty->real_raw) { + if (I_PARMRK(tty) || I_BRKINT(tty) || I_INPCK(tty)) + parity_scan(ch, myflipbuf, myflipflagbuf, &len); + else + memset(myflipflagbuf, TTY_NORMAL, len); + } + + if ((nd->nd_dpa_debug) && + (nd->nd_dpa_port == PORT_NUM(MINOR(tty_devnum(tty))))) + dgrp_dpa_data(nd, 1, myflipbuf, len); + + /* + * If we're doing raw reads, jam it right into the + * line disc bypassing the flip buffers. + */ + if (dgrp_rawreadok && tty->real_raw) + ld->ops->receive_buf(tty, myflipbuf, NULL, len); + else { + len = tty_buffer_request_room(tty, len); + tty_insert_flip_string_flags(tty, myflipbuf, + myflipflagbuf, len); + + /* Tell the tty layer its okay to "eat" the data now */ + tty_flip_buffer_push(tty); + } + + ch->ch_rxcount += len; + } + + if (ld) + tty_ldisc_deref(ld); + + /* + * Wake up any sleepers (maybe dgrp close) that might be waiting + * for a channel flag state change. + */ + wake_up_interruptible(&ch->ch_flag_wait); + return; + +out: + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); +} + + +/* + * parity_scan + * + * Loop to inspect each single character or 0xFF escape. + * + * if PARMRK & ~DOSMODE: + * 0xFF 0xFF Normal 0xFF character, escaped + * to eliminate confusion. + * 0xFF 0x00 0x00 Break + * 0xFF 0x00 CC Error character CC. + * CC Normal character CC. + * + * if PARMRK & DOSMODE: + * 0xFF 0x18 0x00 Break + * 0xFF 0x08 0x00 Framing Error + * 0xFF 0x04 0x00 Parity error + * 0xFF 0x0C 0x00 Both Framing and Parity error + * + * TODO: do we need to do the XMODEM, XOFF, XON, XANY processing?? + * as per protocol + */ +static void parity_scan(struct ch_struct *ch, unsigned char *cbuf, + unsigned char *fbuf, int *len) +{ + int l = *len; + int count = 0; + int DOS = ((ch->ch_iflag & IF_DOSMODE) == 0 ? 0 : 1); + unsigned char *cout; /* character buffer */ + unsigned char *fout; /* flag buffer */ + unsigned char *in; + unsigned char c; + + in = cbuf; + cout = cbuf; + fout = fbuf; + + while (l--) { + c = *in; + in++; + + switch (ch->ch_pscan_state) { + default: + /* reset to sanity and fall through */ + ch->ch_pscan_state = 0 ; + + case 0: + /* No FF seen yet */ + if (c == 0xff) /* delete this character from stream */ + ch->ch_pscan_state = 1; + else { + *cout++ = c; + *fout++ = TTY_NORMAL; + count += 1; + } + break; + + case 1: + /* first FF seen */ + if (c == 0xff) { + /* doubled ff, transform to single ff */ + *cout++ = c; + *fout++ = TTY_NORMAL; + count += 1; + ch->ch_pscan_state = 0; + } else { + /* save value examination in next state */ + ch->ch_pscan_savechar = c; + ch->ch_pscan_state = 2; + } + break; + + case 2: + /* third character of ff sequence */ + *cout++ = c; + if (DOS) { + if (ch->ch_pscan_savechar & 0x10) + *fout++ = TTY_BREAK; + else if (ch->ch_pscan_savechar & 0x08) + *fout++ = TTY_FRAME; + else + /* + * either marked as a parity error, + * indeterminate, or not in DOSMODE + * call it a parity error + */ + *fout++ = TTY_PARITY; + } else { + /* case FF XX ?? where XX is not 00 */ + if (ch->ch_pscan_savechar & 0xff) { + /* this should not happen */ + pr_info("%s: parity_scan: error unexpected byte\n", + __func__); + *fout++ = TTY_PARITY; + } + /* case FF 00 XX where XX is not 00 */ + else if (c == 0xff) + *fout++ = TTY_PARITY; + /* case FF 00 00 */ + else + *fout++ = TTY_BREAK; + + } + count += 1; + ch->ch_pscan_state = 0; + } + } + *len = count; +} + + +/** + * dgrp_net_idle() -- Idle the network connection + * @nd: pointer to node structure to idle + */ +static void dgrp_net_idle(struct nd_struct *nd) +{ + struct ch_struct *ch; + int i; + + nd->nd_tx_work = 1; + + nd->nd_state = NS_IDLE; + nd->nd_flag = 0; + + for (i = nd->nd_seq_out; ; i = (i + 1) & SEQ_MASK) { + if (!nd->nd_seq_wait[i]) { + nd->nd_seq_wait[i] = 0; + wake_up_interruptible(&nd->nd_seq_wque[i]); + } + + if (i == nd->nd_seq_in) + break; + } + + nd->nd_seq_out = nd->nd_seq_in; + + nd->nd_unack = 0; + nd->nd_remain = 0; + + nd->nd_tx_module = 0x10; + nd->nd_rx_module = 0x00; + + for (i = 0, ch = nd->nd_chan; i < CHAN_MAX; i++, ch++) { + ch->ch_state = CS_IDLE; + + ch->ch_otype = 0; + ch->ch_otype_waiting = 0; + } +} + +/* + * Increase the number of channels, waking up any + * threads that might be waiting for the channels + * to appear. + */ +static void increase_channel_count(struct nd_struct *nd, int n) +{ + struct ch_struct *ch; + struct device *classp; + char name[DEVICE_NAME_SIZE]; + int ret; + u8 *buf; + int i; + + for (i = nd->nd_chan_count; i < n; ++i) { + ch = nd->nd_chan + i; + + /* FIXME: return a useful error instead! */ + buf = kmalloc(TBUF_MAX, GFP_KERNEL); + if (!buf) + return; + + if (ch->ch_tbuf) + pr_info_ratelimited("%s - ch_tbuf was not NULL\n", + __func__); + + ch->ch_tbuf = buf; + + buf = kmalloc(RBUF_MAX, GFP_KERNEL); + if (!buf) + return; + + if (ch->ch_rbuf) + pr_info("%s - ch_rbuf was not NULL\n", + __func__); + ch->ch_rbuf = buf; + + classp = tty_port_register_device(&ch->port, + nd->nd_serial_ttdriver, i, + NULL); + + ch->ch_tun.un_sysfs = classp; + snprintf(name, DEVICE_NAME_SIZE, "tty_%d", i); + + dgrp_create_tty_sysfs(&ch->ch_tun, classp); + ret = sysfs_create_link(&nd->nd_class_dev->kobj, + &classp->kobj, name); + + /* NOTE: We don't support "cu" devices anymore, + * so you will notice we don't register them + * here anymore. */ + if (dgrp_register_prdevices) { + classp = tty_register_device(nd->nd_xprint_ttdriver, + i, NULL); + ch->ch_pun.un_sysfs = classp; + snprintf(name, DEVICE_NAME_SIZE, "pr_%d", i); + + dgrp_create_tty_sysfs(&ch->ch_pun, classp); + ret = sysfs_create_link(&nd->nd_class_dev->kobj, + &classp->kobj, name); + } + + nd->nd_chan_count = i + 1; + wake_up_interruptible(&ch->ch_flag_wait); + } +} + +/* + * Decrease the number of channels, and wake up any threads that might + * be waiting on the channels that vanished. + */ +static void decrease_channel_count(struct nd_struct *nd, int n) +{ + struct ch_struct *ch; + char name[DEVICE_NAME_SIZE]; + int i; + + for (i = nd->nd_chan_count - 1; i >= n; --i) { + ch = nd->nd_chan + i; + + /* + * Make any open ports inoperative. + */ + ch->ch_state = CS_IDLE; + + ch->ch_otype = 0; + ch->ch_otype_waiting = 0; + + /* + * Only "HANGUP" if we care about carrier + * transitions and we are already open. + */ + if (ch->ch_open_count != 0) { + ch->ch_flag |= CH_HANGUP; + dgrp_carrier(ch); + } + + /* + * Unlike the CH_HANGUP flag above, use another + * flag to indicate to the RealPort state machine + * that this port has disappeared. + */ + if (ch->ch_open_count != 0) + ch->ch_flag |= CH_PORT_GONE; + + wake_up_interruptible(&ch->ch_flag_wait); + + nd->nd_chan_count = i; + + kfree(ch->ch_tbuf); + ch->ch_tbuf = NULL; + + kfree(ch->ch_rbuf); + ch->ch_rbuf = NULL; + + nd->nd_chan_count = i; + + dgrp_remove_tty_sysfs(ch->ch_tun.un_sysfs); + snprintf(name, DEVICE_NAME_SIZE, "tty_%d", i); + sysfs_remove_link(&nd->nd_class_dev->kobj, name); + tty_unregister_device(nd->nd_serial_ttdriver, i); + + /* + * NOTE: We don't support "cu" devices anymore, so don't + * unregister them here anymore. + */ + + if (dgrp_register_prdevices) { + dgrp_remove_tty_sysfs(ch->ch_pun.un_sysfs); + snprintf(name, DEVICE_NAME_SIZE, "pr_%d", i); + sysfs_remove_link(&nd->nd_class_dev->kobj, name); + tty_unregister_device(nd->nd_xprint_ttdriver, i); + } + } +} + +/** + * dgrp_chan_count() -- Adjust the node channel count. + * @nd: pointer to a node structure + * @n: new value for channel count + * + * Adjusts the node channel count. If new ports have appeared, it tries + * to signal those processes that might have been waiting for ports to + * appear. If ports have disappeared it tries to signal those processes + * that might be hung waiting for a response for the now non-existant port. + */ +static void dgrp_chan_count(struct nd_struct *nd, int n) +{ + if (n == nd->nd_chan_count) + return; + + if (n > nd->nd_chan_count) + increase_channel_count(nd, n); + + if (n < nd->nd_chan_count) + decrease_channel_count(nd, n); +} + +/** + * dgrp_monitor() -- send data to the device monitor queue + * @nd: pointer to a node structure + * @buf: data to copy to the monitoring buffer + * @len: number of bytes to transfer to the buffer + * + * Called by the net device routines to send data to the device + * monitor queue. If the device monitor buffer is too full to + * accept the data, it waits until the buffer is ready. + */ +static void dgrp_monitor(struct nd_struct *nd, u8 *buf, int len) +{ + int n; + int r; + int rtn; + + /* + * Grab monitor lock. + */ + down(&nd->nd_mon_semaphore); + + /* + * Loop while data remains. + */ + while ((len > 0) && (nd->nd_mon_buf)) { + /* + * Determine the amount of available space left in the + * buffer. If there's none, wait until some appears. + */ + + n = (nd->nd_mon_out - nd->nd_mon_in - 1) & MON_MASK; + + if (!n) { + nd->nd_mon_flag |= MON_WAIT_SPACE; + + up(&nd->nd_mon_semaphore); + + /* + * Go to sleep waiting until the condition becomes true. + */ + rtn = wait_event_interruptible(nd->nd_mon_wqueue, + ((nd->nd_mon_flag & MON_WAIT_SPACE) == 0)); + +/* FIXME: really ignore rtn? */ + + /* + * We can't exit here if we receive a signal, since + * to do so would trash the debug stream. + */ + + down(&nd->nd_mon_semaphore); + + continue; + } + + /* + * Copy as much data as will fit. + */ + + if (n > len) + n = len; + + r = MON_MAX - nd->nd_mon_in; + + if (r <= n) { + memcpy(nd->nd_mon_buf + nd->nd_mon_in, buf, r); + + n -= r; + + nd->nd_mon_in = 0; + + buf += r; + len -= r; + } + + memcpy(nd->nd_mon_buf + nd->nd_mon_in, buf, n); + + nd->nd_mon_in += n; + + buf += n; + len -= n; + + if (nd->nd_mon_in >= MON_MAX) + pr_info_ratelimited("%s - nd_mon_in (%i) >= MON_MAX\n", + __func__, nd->nd_mon_in); + + /* + * Wakeup any thread waiting for data + */ + + if (nd->nd_mon_flag & MON_WAIT_DATA) { + nd->nd_mon_flag &= ~MON_WAIT_DATA; + wake_up_interruptible(&nd->nd_mon_wqueue); + } + } + + /* + * Release the monitor lock. + */ + up(&nd->nd_mon_semaphore); +} + +/** + * dgrp_encode_time() -- Encodes rpdump time into a 4-byte quantity. + * @nd: pointer to a node structure + * @buf: destination buffer + * + * Encodes "rpdump" time into a 4-byte quantity. Time is measured since + * open. + */ +static void dgrp_encode_time(struct nd_struct *nd, u8 *buf) +{ + ulong t; + + /* + * Convert time in HZ since open to time in milliseconds + * since open. + */ + t = jiffies - nd->nd_mon_lbolt; + t = 1000 * (t / HZ) + 1000 * (t % HZ) / HZ; + + put_unaligned_be32((uint)(t & 0xffffffff), buf); +} + + + +/** + * dgrp_monitor_message() -- Builds a rpdump style message. + * @nd: pointer to a node structure + * @message: destination buffer + */ +static void dgrp_monitor_message(struct nd_struct *nd, char *message) +{ + u8 header[7]; + int n; + + header[0] = RPDUMP_MESSAGE; + + dgrp_encode_time(nd, header + 1); + + n = strlen(message); + + put_unaligned_be16(n, header + 5); + + dgrp_monitor(nd, header, sizeof(header)); + dgrp_monitor(nd, (u8 *) message, n); +} + + + +/** + * dgrp_monitor_reset() -- Note a reset in the monitoring buffer. + * @nd: pointer to a node structure + */ +static void dgrp_monitor_reset(struct nd_struct *nd) +{ + u8 header[5]; + + header[0] = RPDUMP_RESET; + + dgrp_encode_time(nd, header + 1); + + dgrp_monitor(nd, header, sizeof(header)); +} + +/** + * dgrp_monitor_data() -- builds a monitor data packet + * @nd: pointer to a node structure + * @type: type of message to be logged + * @buf: data to be logged + * @size: number of bytes in the buffer + */ +static void dgrp_monitor_data(struct nd_struct *nd, u8 type, u8 *buf, int size) +{ + u8 header[7]; + + header[0] = type; + + dgrp_encode_time(nd, header + 1); + + put_unaligned_be16(size, header + 5); + + dgrp_monitor(nd, header, sizeof(header)); + dgrp_monitor(nd, buf, size); +} + +static int alloc_nd_buffers(struct nd_struct *nd) +{ + + nd->nd_iobuf = NULL; + nd->nd_writebuf = NULL; + nd->nd_inputbuf = NULL; + nd->nd_inputflagbuf = NULL; + + /* + * Allocate the network read/write buffer. + */ + nd->nd_iobuf = kzalloc(UIO_MAX + 10, GFP_KERNEL); + if (!nd->nd_iobuf) + goto out_err; + + /* + * Allocate a buffer for doing the copy from user space to + * kernel space in the write routines. + */ + nd->nd_writebuf = kzalloc(WRITEBUFLEN, GFP_KERNEL); + if (!nd->nd_writebuf) + goto out_err; + + /* + * Allocate a buffer for doing the copy from kernel space to + * tty buffer space in the read routines. + */ + nd->nd_inputbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); + if (!nd->nd_inputbuf) + goto out_err; + + /* + * Allocate a buffer for doing the copy from kernel space to + * tty buffer space in the read routines. + */ + nd->nd_inputflagbuf = kzalloc(MYFLIPLEN, GFP_KERNEL); + if (!nd->nd_inputflagbuf) + goto out_err; + + return 0; + +out_err: + kfree(nd->nd_iobuf); + kfree(nd->nd_writebuf); + kfree(nd->nd_inputbuf); + kfree(nd->nd_inputflagbuf); + return -ENOMEM; +} + +/* + * dgrp_net_open() -- Open the NET device for a particular PortServer + */ +static int dgrp_net_open(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + struct proc_dir_entry *de; + ulong lock_flags; + int rtn; + + rtn = try_module_get(THIS_MODULE); + if (!rtn) + return -EAGAIN; + + if (!capable(CAP_SYS_ADMIN)) { + rtn = -EPERM; + goto done; + } + + /* + * Make sure that the "private_data" field hasn't already been used. + */ + if (file->private_data) { + rtn = -EINVAL; + goto done; + } + + /* + * Get the node pointer, and fail if it doesn't exist. + */ + de = PDE(inode); + if (!de) { + rtn = -ENXIO; + goto done; + } + + nd = (struct nd_struct *) de->data; + if (!nd) { + rtn = -ENXIO; + goto done; + } + + file->private_data = (void *) nd; + + /* + * Grab the NET lock. + */ + down(&nd->nd_net_semaphore); + + if (nd->nd_state != NS_CLOSED) { + rtn = -EBUSY; + goto unlock; + } + + /* + * Initialize the link speed parameters. + */ + + nd->nd_link.lk_fast_rate = UIO_MAX; + nd->nd_link.lk_slow_rate = UIO_MAX; + + nd->nd_link.lk_fast_delay = 1000; + nd->nd_link.lk_slow_delay = 1000; + + nd->nd_link.lk_header_size = 46; + + + rtn = alloc_nd_buffers(nd); + if (rtn) + goto unlock; + + /* + * The port is now open, so move it to the IDLE state + */ + dgrp_net_idle(nd); + + nd->nd_tx_time = jiffies; + + /* + * If the polling routing is not running, start it running here + */ + spin_lock_irqsave(&dgrp_poll_data.poll_lock, lock_flags); + + if (!dgrp_poll_data.node_active_count) { + dgrp_poll_data.node_active_count = 2; + dgrp_poll_data.timer.expires = jiffies + + dgrp_poll_tick * HZ / 1000; + add_timer(&dgrp_poll_data.timer); + } + + spin_unlock_irqrestore(&dgrp_poll_data.poll_lock, lock_flags); + + dgrp_monitor_message(nd, "Net Open"); + +unlock: + /* + * Release the NET lock. + */ + up(&nd->nd_net_semaphore); + +done: + if (rtn) + module_put(THIS_MODULE); + + return rtn; +} + +/* dgrp_net_release() -- close the NET device for a particular PortServer */ +static int dgrp_net_release(struct inode *inode, struct file *file) +{ + struct nd_struct *nd; + ulong lock_flags; + + nd = (struct nd_struct *)(file->private_data); + if (!nd) + goto done; + +/* TODO : historical locking placeholder */ +/* + * In the HPUX version of the RealPort driver (which served as a basis + * for this driver) this locking code was used. Saved if ever we need + * to review the locking under Linux. + */ +/* spinlock(&nd->nd_lock); */ + + + /* + * Grab the NET lock. + */ + down(&nd->nd_net_semaphore); + + /* + * Before "closing" the internal connection, make sure all + * ports are "idle". + */ + dgrp_net_idle(nd); + + nd->nd_state = NS_CLOSED; + nd->nd_flag = 0; + + /* + * TODO ... must the wait queue be reset on close? + * should any pending waiters be reset? + * Let's decide to assert that the waitq is empty... and see + * how soon we break. + */ + if (waitqueue_active(&nd->nd_tx_waitq)) + pr_info("%s - expected waitqueue_active to be false\n", + __func__); + + nd->nd_send = 0; + + kfree(nd->nd_iobuf); + nd->nd_iobuf = NULL; + +/* TODO : historical locking placeholder */ +/* + * In the HPUX version of the RealPort driver (which served as a basis + * for this driver) this locking code was used. Saved if ever we need + * to review the locking under Linux. + */ +/* spinunlock( &nd->nd_lock ); */ + + + kfree(nd->nd_writebuf); + nd->nd_writebuf = NULL; + + kfree(nd->nd_inputbuf); + nd->nd_inputbuf = NULL; + + kfree(nd->nd_inputflagbuf); + nd->nd_inputflagbuf = NULL; + +/* TODO : historical locking placeholder */ +/* + * In the HPUX version of the RealPort driver (which served as a basis + * for this driver) this locking code was used. Saved if ever we need + * to review the locking under Linux. + */ +/* spinlock(&nd->nd_lock); */ + + /* + * Set the active port count to zero. + */ + dgrp_chan_count(nd, 0); + +/* TODO : historical locking placeholder */ +/* + * In the HPUX version of the RealPort driver (which served as a basis + * for this driver) this locking code was used. Saved if ever we need + * to review the locking under Linux. + */ +/* spinunlock(&nd->nd_lock); */ + + /* + * Release the NET lock. + */ + up(&nd->nd_net_semaphore); + + /* + * Cause the poller to stop scheduling itself if this is + * the last active node. + */ + spin_lock_irqsave(&dgrp_poll_data.poll_lock, lock_flags); + + if (dgrp_poll_data.node_active_count == 2) { + del_timer(&dgrp_poll_data.timer); + dgrp_poll_data.node_active_count = 0; + } + + spin_unlock_irqrestore(&dgrp_poll_data.poll_lock, lock_flags); + +done: + down(&nd->nd_net_semaphore); + + dgrp_monitor_message(nd, "Net Close"); + + up(&nd->nd_net_semaphore); + + module_put(THIS_MODULE); + file->private_data = NULL; + return 0; +} + +/* used in dgrp_send to setup command header */ +static inline u8 *set_cmd_header(u8 *b, u8 port, u8 cmd) +{ + *b++ = 0xb0 + (port & 0x0f); + *b++ = cmd; + return b; +} + +/** + * dgrp_send() -- build a packet for transmission to the server + * @nd: pointer to a node structure + * @tmax: maximum bytes to transmit + * + * returns number of bytes sent + */ +static int dgrp_send(struct nd_struct *nd, long tmax) +{ + struct ch_struct *ch = nd->nd_chan; + u8 *b; + u8 *buf; + u8 *mbuf; + u8 port; + int mod; + long send; + int maxport; + long lastport = -1; + ushort rwin; + long in; + ushort n; + long t; + long ttotal; + long tchan; + long tsend; + ushort tsafe; + long work; + long send_sync; + long wanted_sync_port = -1; + ushort tdata[CHAN_MAX]; + long used_buffer; + + mbuf = nd->nd_iobuf + UIO_BASE; + buf = b = mbuf; + + send_sync = nd->nd_link.lk_slow_rate < UIO_MAX; + + ttotal = 0; + tchan = 0; + + memset(tdata, 0, sizeof(tdata)); + + + /* + * If there are any outstanding requests to be serviced, + * service them here. + */ + if (nd->nd_send & NR_PASSWORD) { + + /* + * Send Password response. + */ + + b[0] = 0xfc; + b[1] = 0x20; + put_unaligned_be16(strlen(nd->password), b + 2); + b += 4; + b += strlen(nd->password); + nd->nd_send &= ~(NR_PASSWORD); + } + + + /* + * Loop over all modules to generate commands, and determine + * the amount of data queued for transmit. + */ + + for (mod = 0, port = 0; port < nd->nd_chan_count; mod++) { + /* + * If this is not the current module, enter a module select + * code in the buffer. + */ + + if (mod != nd->nd_tx_module) + mbuf = ++b; + + /* + * Loop to process one module. + */ + + maxport = port + 16; + + if (maxport > nd->nd_chan_count) + maxport = nd->nd_chan_count; + + for (; port < maxport; port++, ch++) { + /* + * Switch based on channel state. + */ + + switch (ch->ch_state) { + /* + * Send requests when the port is closed, and there + * are no Open, Close or Cancel requests expected. + */ + + case CS_IDLE: + /* + * Wait until any open error code + * has been delivered to all + * associated ports. + */ + + if (ch->ch_open_error) { + if (ch->ch_wait_count[ch->ch_otype]) { + work = 1; + break; + } + + ch->ch_open_error = 0; + } + + /* + * Wait until the channel HANGUP flag is reset + * before sending the first open. We can only + * get to this state after a server disconnect. + */ + + if ((ch->ch_flag & CH_HANGUP) != 0) + break; + + /* + * If recovering from a TCP disconnect, or if + * there is an immediate open pending, send an + * Immediate Open request. + */ + if ((ch->ch_flag & CH_PORT_GONE) || + ch->ch_wait_count[OTYPE_IMMEDIATE] != 0) { + b = set_cmd_header(b, port, 10); + *b++ = 0; + + ch->ch_state = CS_WAIT_OPEN; + ch->ch_otype = OTYPE_IMMEDIATE; + break; + } + + /* + * If there is no Persistent or Incoming Open on the wait + * list in the server, and a thread is waiting for a + * Persistent or Incoming Open, send a Persistent or Incoming + * Open Request. + */ + if (ch->ch_otype_waiting == 0) { + if (ch->ch_wait_count[OTYPE_PERSISTENT] != 0) { + b = set_cmd_header(b, port, 10); + *b++ = 1; + + ch->ch_state = CS_WAIT_OPEN; + ch->ch_otype = OTYPE_PERSISTENT; + } else if (ch->ch_wait_count[OTYPE_INCOMING] != 0) { + b = set_cmd_header(b, port, 10); + *b++ = 2; + + ch->ch_state = CS_WAIT_OPEN; + ch->ch_otype = OTYPE_INCOMING; + } + break; + } + + /* + * If a Persistent or Incoming Open is pending in + * the server, but there is no longer an open + * thread waiting for it, cancel the request. + */ + + if (ch->ch_wait_count[ch->ch_otype_waiting] == 0) { + b = set_cmd_header(b, port, 10); + *b++ = 4; + + ch->ch_state = CS_WAIT_CANCEL; + ch->ch_otype = ch->ch_otype_waiting; + } + break; + + /* + * Send port parameter queries. + */ + case CS_SEND_QUERY: + /* + * Clear out all FEP state that might remain + * from the last connection. + */ + + ch->ch_flag |= CH_PARAM; + + ch->ch_flag &= ~CH_RX_FLUSH; + + ch->ch_expect = 0; + + ch->ch_s_tin = 0; + ch->ch_s_tpos = 0; + ch->ch_s_tsize = 0; + ch->ch_s_treq = 0; + ch->ch_s_elast = 0; + + ch->ch_s_rin = 0; + ch->ch_s_rwin = 0; + ch->ch_s_rsize = 0; + + ch->ch_s_tmax = 0; + ch->ch_s_ttime = 0; + ch->ch_s_rmax = 0; + ch->ch_s_rtime = 0; + ch->ch_s_rlow = 0; + ch->ch_s_rhigh = 0; + + ch->ch_s_brate = 0; + ch->ch_s_iflag = 0; + ch->ch_s_cflag = 0; + ch->ch_s_oflag = 0; + ch->ch_s_xflag = 0; + + ch->ch_s_mout = 0; + ch->ch_s_mflow = 0; + ch->ch_s_mctrl = 0; + ch->ch_s_xon = 0; + ch->ch_s_xoff = 0; + ch->ch_s_lnext = 0; + ch->ch_s_xxon = 0; + ch->ch_s_xxoff = 0; + + /* Send Sequence Request */ + b = set_cmd_header(b, port, 14); + + /* Configure Event Conditions Packet */ + b = set_cmd_header(b, port, 42); + put_unaligned_be16(0x02c0, b); + b += 2; + *b++ = (DM_DTR | DM_RTS | DM_CTS | + DM_DSR | DM_RI | DM_CD); + + /* Send Status Request */ + b = set_cmd_header(b, port, 16); + + /* Send Buffer Request */ + b = set_cmd_header(b, port, 20); + + /* Send Port Capability Request */ + b = set_cmd_header(b, port, 22); + + ch->ch_expect = (RR_SEQUENCE | + RR_STATUS | + RR_BUFFER | + RR_CAPABILITY); + + ch->ch_state = CS_WAIT_QUERY; + + /* Raise modem signals */ + b = set_cmd_header(b, port, 44); + + if (ch->ch_flag & CH_PORT_GONE) + ch->ch_s_mout = ch->ch_mout; + else + ch->ch_s_mout = ch->ch_mout = DM_DTR | DM_RTS; + + *b++ = ch->ch_mout; + *b++ = ch->ch_s_mflow = 0; + *b++ = ch->ch_s_mctrl = ch->ch_mctrl = 0; + + if (ch->ch_flag & CH_PORT_GONE) + ch->ch_flag &= ~CH_PORT_GONE; + + break; + + /* + * Handle normal open and ready mode. + */ + + case CS_READY: + + /* + * If the port is not open, and there are no + * no longer any ports requesting an open, + * then close the port. + */ + + if (ch->ch_open_count == 0 && + ch->ch_wait_count[ch->ch_otype] == 0) { + goto send_close; + } + + /* + * Process waiting input. + * + * If there is no one to read it, discard the data. + * + * Otherwise if we are not in fastcook mode, or if there is a + * fastcook thread waiting for data, send the data to the + * line discipline. + */ + if (ch->ch_rin != ch->ch_rout) { + if (ch->ch_tun.un_open_count == 0 || + (ch->ch_tun.un_flag & UN_CLOSING) || + (ch->ch_cflag & CF_CREAD) == 0) { + ch->ch_rout = ch->ch_rin; + } else if ((ch->ch_flag & CH_FAST_READ) == 0 || + ch->ch_inwait != 0) { + dgrp_input(ch); + + if (ch->ch_rin != ch->ch_rout) + work = 1; + } + } + + /* + * Handle receive flush, and changes to + * server port parameters. + */ + + if (ch->ch_flag & (CH_RX_FLUSH | CH_PARAM)) { + /* + * If we are in receive flush mode, + * and enough data has gone by, reset + * receive flush mode. + */ + if (ch->ch_flag & CH_RX_FLUSH) { + if (((ch->ch_flush_seq - nd->nd_seq_out) & SEQ_MASK) > + ((nd->nd_seq_in - nd->nd_seq_out) & SEQ_MASK)) + ch->ch_flag &= ~CH_RX_FLUSH; + else + work = 1; + } + + /* + * Send TMAX, TTIME. + */ + + if (ch->ch_s_tmax != ch->ch_tmax || + ch->ch_s_ttime != ch->ch_ttime) { + b = set_cmd_header(b, port, 48); + + ch->ch_s_tmax = ch->ch_tmax; + ch->ch_s_ttime = ch->ch_ttime; + + put_unaligned_be16(ch->ch_s_tmax, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_ttime, + b); + b += 2; + } + + /* + * Send RLOW, RHIGH. + */ + + if (ch->ch_s_rlow != ch->ch_rlow || + ch->ch_s_rhigh != ch->ch_rhigh) { + b = set_cmd_header(b, port, 45); + + ch->ch_s_rlow = ch->ch_rlow; + ch->ch_s_rhigh = ch->ch_rhigh; + + put_unaligned_be16(ch->ch_s_rlow, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_rhigh, + b); + b += 2; + } + + /* + * Send BRATE, CFLAG, IFLAG, + * OFLAG, XFLAG. + */ + + if (ch->ch_s_brate != ch->ch_brate || + ch->ch_s_cflag != ch->ch_cflag || + ch->ch_s_iflag != ch->ch_iflag || + ch->ch_s_oflag != ch->ch_oflag || + ch->ch_s_xflag != ch->ch_xflag) { + b = set_cmd_header(b, port, 40); + + ch->ch_s_brate = ch->ch_brate; + ch->ch_s_cflag = ch->ch_cflag; + ch->ch_s_iflag = ch->ch_iflag; + ch->ch_s_oflag = ch->ch_oflag; + ch->ch_s_xflag = ch->ch_xflag; + + put_unaligned_be16(ch->ch_s_brate, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_cflag, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_iflag, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_oflag, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_xflag, + b); + b += 2; + } + + /* + * Send MOUT, MFLOW, MCTRL. + */ + + if (ch->ch_s_mout != ch->ch_mout || + ch->ch_s_mflow != ch->ch_mflow || + ch->ch_s_mctrl != ch->ch_mctrl) { + b = set_cmd_header(b, port, 44); + + *b++ = ch->ch_s_mout = ch->ch_mout; + *b++ = ch->ch_s_mflow = ch->ch_mflow; + *b++ = ch->ch_s_mctrl = ch->ch_mctrl; + } + + /* + * Send Flow control characters. + */ + + if (ch->ch_s_xon != ch->ch_xon || + ch->ch_s_xoff != ch->ch_xoff || + ch->ch_s_lnext != ch->ch_lnext || + ch->ch_s_xxon != ch->ch_xxon || + ch->ch_s_xxoff != ch->ch_xxoff) { + b = set_cmd_header(b, port, 46); + + *b++ = ch->ch_s_xon = ch->ch_xon; + *b++ = ch->ch_s_xoff = ch->ch_xoff; + *b++ = ch->ch_s_lnext = ch->ch_lnext; + *b++ = ch->ch_s_xxon = ch->ch_xxon; + *b++ = ch->ch_s_xxoff = ch->ch_xxoff; + } + + /* + * Send RMAX, RTIME. + */ + + if (ch->ch_s_rmax != ch->ch_rmax || + ch->ch_s_rtime != ch->ch_rtime) { + b = set_cmd_header(b, port, 47); + + ch->ch_s_rmax = ch->ch_rmax; + ch->ch_s_rtime = ch->ch_rtime; + + put_unaligned_be16(ch->ch_s_rmax, + b); + b += 2; + + put_unaligned_be16(ch->ch_s_rtime, + b); + b += 2; + } + + ch->ch_flag &= ~CH_PARAM; + wake_up_interruptible(&ch->ch_flag_wait); + } + + + /* + * Handle action commands. + */ + + if (ch->ch_send != 0) { + /* int send = ch->ch_send & ~ch->ch_expect; */ + send = ch->ch_send & ~ch->ch_expect; + + /* Send character immediate */ + if ((send & RR_TX_ICHAR) != 0) { + b = set_cmd_header(b, port, 60); + + *b++ = ch->ch_xon; + ch->ch_expect |= RR_TX_ICHAR; + } + + /* BREAK request */ + if ((send & RR_TX_BREAK) != 0) { + if (ch->ch_break_time != 0) { + b = set_cmd_header(b, port, 61); + put_unaligned_be16(ch->ch_break_time, + b); + b += 2; + + ch->ch_expect |= RR_TX_BREAK; + ch->ch_break_time = 0; + } else { + ch->ch_send &= ~RR_TX_BREAK; + ch->ch_flag &= ~CH_TX_BREAK; + wake_up_interruptible(&ch->ch_flag_wait); + } + } + + /* + * Flush input/output buffers. + */ + + if ((send & (RR_RX_FLUSH | RR_TX_FLUSH)) != 0) { + b = set_cmd_header(b, port, 62); + + *b++ = ((send & RR_TX_FLUSH) == 0 ? 1 : + (send & RR_RX_FLUSH) == 0 ? 2 : 3); + + if (send & RR_RX_FLUSH) { + ch->ch_flush_seq = nd->nd_seq_in; + ch->ch_flag |= CH_RX_FLUSH; + work = 1; + send_sync = 1; + wanted_sync_port = port; + } + + ch->ch_send &= ~(RR_RX_FLUSH | RR_TX_FLUSH); + } + + /* Pause input/output */ + if ((send & (RR_RX_STOP | RR_TX_STOP)) != 0) { + b = set_cmd_header(b, port, 63); + *b = 0; + + if ((send & RR_TX_STOP) != 0) + *b |= EV_OPU; + + if ((send & RR_RX_STOP) != 0) + *b |= EV_IPU; + + b++; + + ch->ch_send &= ~(RR_RX_STOP | RR_TX_STOP); + } + + /* Start input/output */ + if ((send & (RR_RX_START | RR_TX_START)) != 0) { + b = set_cmd_header(b, port, 64); + *b = 0; + + if ((send & RR_TX_START) != 0) + *b |= EV_OPU | EV_OPS | EV_OPX; + + if ((send & RR_RX_START) != 0) + *b |= EV_IPU | EV_IPS; + + b++; + + ch->ch_send &= ~(RR_RX_START | RR_TX_START); + } + } + + + /* + * Send a window sequence to acknowledge received data. + */ + + rwin = (ch->ch_s_rin + + ((ch->ch_rout - ch->ch_rin - 1) & RBUF_MASK)); + + n = (rwin - ch->ch_s_rwin) & 0xffff; + + if (n >= RBUF_MAX / 4) { + b[0] = 0xa0 + (port & 0xf); + ch->ch_s_rwin = rwin; + put_unaligned_be16(rwin, b + 1); + b += 3; + } + + /* + * If the terminal is waiting on LOW + * water or EMPTY, and the condition + * is now satisfied, call the line + * discipline to put more data in the + * buffer. + */ + + n = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + + if ((ch->ch_tun.un_flag & (UN_EMPTY|UN_LOW)) != 0) { + if ((ch->ch_tun.un_flag & UN_LOW) != 0 ? + (n <= TBUF_LOW) : + (n == 0 && ch->ch_s_tpos == ch->ch_s_tin)) { + ch->ch_tun.un_flag &= ~(UN_EMPTY|UN_LOW); + + if (waitqueue_active(&((ch->ch_tun.un_tty)->write_wait))) + wake_up_interruptible(&((ch->ch_tun.un_tty)->write_wait)); + tty_wakeup(ch->ch_tun.un_tty); + n = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + } + } + + /* + * If the printer is waiting on LOW + * water, TIME, EMPTY or PWAIT, and is + * now ready to put more data in the + * buffer, call the line discipline to + * do the job. + */ + + if (ch->ch_pun.un_open_count && + (ch->ch_pun.un_flag & + (UN_EMPTY|UN_TIME|UN_LOW|UN_PWAIT)) != 0) { + + if ((ch->ch_pun.un_flag & UN_LOW) != 0 ? + (n <= TBUF_LOW) : + (ch->ch_pun.un_flag & UN_TIME) != 0 ? + ((jiffies - ch->ch_waketime) >= 0) : + (n == 0 && ch->ch_s_tpos == ch->ch_s_tin) && + ((ch->ch_pun.un_flag & UN_EMPTY) != 0 || + ((ch->ch_tun.un_open_count && + ch->ch_tun.un_tty->ops->chars_in_buffer) ? + (ch->ch_tun.un_tty->ops->chars_in_buffer)(ch->ch_tun.un_tty) == 0 + : 1 + ) + )) { + ch->ch_pun.un_flag &= ~(UN_EMPTY | UN_TIME | UN_LOW | UN_PWAIT); + + if (waitqueue_active(&((ch->ch_pun.un_tty)->write_wait))) + wake_up_interruptible(&((ch->ch_pun.un_tty)->write_wait)); + tty_wakeup(ch->ch_pun.un_tty); + n = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + + } else if ((ch->ch_pun.un_flag & UN_TIME) != 0) { + work = 1; + } + } + + + /* + * Determine the max number of bytes + * this port can send, including + * packet header overhead. + */ + + t = ((ch->ch_s_tsize + ch->ch_s_tpos - ch->ch_s_tin) & 0xffff); + + if (n > t) + n = t; + + if (n != 0) { + n += (n <= 8 ? 1 : n <= 255 ? 2 : 3); + + tdata[tchan++] = n; + ttotal += n; + } + break; + + /* + * Close the port. + */ + +send_close: + case CS_SEND_CLOSE: + b = set_cmd_header(b, port, 10); + if (ch->ch_otype == OTYPE_IMMEDIATE) + *b++ = 3; + else + *b++ = 4; + + ch->ch_state = CS_WAIT_CLOSE; + break; + + /* + * Wait for a previous server request. + */ + + case CS_WAIT_OPEN: + case CS_WAIT_CANCEL: + case CS_WAIT_FAIL: + case CS_WAIT_QUERY: + case CS_WAIT_CLOSE: + break; + + default: + pr_info("%s - unexpected channel state (%i)\n", + __func__, ch->ch_state); + } + } + + /* + * If a module select code is needed, drop one in. If space + * was reserved for one, but none is needed, recover the space. + */ + + if (mod != nd->nd_tx_module) { + if (b != mbuf) { + mbuf[-1] = 0xf0 | mod; + nd->nd_tx_module = mod; + } else { + b--; + } + } + } + + /* + * Adjust "tmax" so that under worst case conditions we do + * not overflow either the daemon buffer or the internal + * buffer in the loop that follows. Leave a safe area + * of 64 bytes so we start getting asserts before we start + * losing data or clobbering memory. + */ + + n = UIO_MAX - UIO_BASE; + + if (tmax > n) + tmax = n; + + tmax -= 64; + + tsafe = tmax; + + /* + * Allocate space for 5 Module Selects, 1 Sequence Request, + * and 1 Set TREQ for each active channel. + */ + + tmax -= 5 + 3 + 4 * nd->nd_chan_count; + + /* + * Further reduce "tmax" to the available transmit credit. + * Note that this is a soft constraint; The transmit credit + * can go negative for a time and then recover. + */ + + n = nd->nd_tx_deposit - nd->nd_tx_charge - nd->nd_link.lk_header_size; + + if (tmax > n) + tmax = n; + + /* + * Finally reduce tmax by the number of bytes already in + * the buffer. + */ + + tmax -= b - buf; + + /* + * Suspend data transmit unless every ready channel can send + * at least 1 character. + */ + if (tmax < 2 * nd->nd_chan_count) { + tsend = 1; + + } else if (tchan > 1 && ttotal > tmax) { + + /* + * If transmit is limited by the credit budget, find the + * largest number of characters we can send without driving + * the credit negative. + */ + + long tm = tmax; + int tc = tchan; + int try; + + tsend = tm / tc; + + for (try = 0; try < 3; try++) { + int i; + int c = 0; + + for (i = 0; i < tc; i++) { + if (tsend < tdata[i]) + tdata[c++] = tdata[i]; + else + tm -= tdata[i]; + } + + if (c == tc) + break; + + tsend = tm / c; + + if (c == 1) + break; + + tc = c; + } + + tsend = tm / nd->nd_chan_count; + + if (tsend < 2) + tsend = 1; + + } else { + /* + * If no budgetary constraints, or only one channel ready + * to send, set the character limit to the remaining + * buffer size. + */ + + tsend = tmax; + } + + tsend -= (tsend <= 9) ? 1 : (tsend <= 257) ? 2 : 3; + + /* + * Loop over all channels, sending queued data. + */ + + port = 0; + ch = nd->nd_chan; + used_buffer = tmax; + + for (mod = 0; port < nd->nd_chan_count; mod++) { + /* + * If this is not the current module, enter a module select + * code in the buffer. + */ + + if (mod != nd->nd_tx_module) + mbuf = ++b; + + /* + * Loop to process one module. + */ + + maxport = port + 16; + + if (maxport > nd->nd_chan_count) + maxport = nd->nd_chan_count; + + for (; port < maxport; port++, ch++) { + if (ch->ch_state != CS_READY) + continue; + + lastport = port; + + n = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + + /* + * If there is data that can be sent, send it. + */ + + if (n != 0 && used_buffer > 0) { + t = (ch->ch_s_tsize + ch->ch_s_tpos - ch->ch_s_tin) & 0xffff; + + if (n > t) + n = t; + + if (n > tsend) { + work = 1; + n = tsend; + } + + if (n > used_buffer) { + work = 1; + n = used_buffer; + } + + if (n <= 0) + continue; + + /* + * Create the correct size transmit header, + * depending on the amount of data to transmit. + */ + + if (n <= 8) { + + b[0] = ((n - 1) << 4) + (port & 0xf); + b += 1; + + } else if (n <= 255) { + + b[0] = 0x80 + (port & 0xf); + b[1] = n; + b += 2; + + } else { + + b[0] = 0x90 + (port & 0xf); + put_unaligned_be16(n, b + 1); + b += 3; + } + + ch->ch_s_tin = (ch->ch_s_tin + n) & 0xffff; + + /* + * Copy transmit data to the packet. + */ + + t = TBUF_MAX - ch->ch_tout; + + if (n >= t) { + memcpy(b, ch->ch_tbuf + ch->ch_tout, t); + b += t; + n -= t; + used_buffer -= t; + ch->ch_tout = 0; + } + + memcpy(b, ch->ch_tbuf + ch->ch_tout, n); + b += n; + used_buffer -= n; + ch->ch_tout += n; + n = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + } + + /* + * Wake any terminal unit process waiting in the + * dgrp_write routine for low water. + */ + + if (n > TBUF_LOW) + continue; + + if ((ch->ch_flag & CH_LOW) != 0) { + ch->ch_flag &= ~CH_LOW; + wake_up_interruptible(&ch->ch_flag_wait); + } + + /* selwakeup tty_sel */ + if (ch->ch_tun.un_open_count) { + struct tty_struct *tty = (ch->ch_tun.un_tty); + + if (waitqueue_active(&tty->write_wait)) + wake_up_interruptible(&tty->write_wait); + + tty_wakeup(tty); + } + + if (ch->ch_pun.un_open_count) { + struct tty_struct *tty = (ch->ch_pun.un_tty); + + if (waitqueue_active(&tty->write_wait)) + wake_up_interruptible(&tty->write_wait); + + tty_wakeup(tty); + } + + /* + * Do EMPTY processing. + */ + + if (n != 0) + continue; + + if ((ch->ch_flag & (CH_EMPTY | CH_DRAIN)) != 0 || + (ch->ch_pun.un_flag & UN_EMPTY) != 0) { + /* + * If there is still data in the server, ask the server + * to notify us when its all gone. + */ + + if (ch->ch_s_treq != ch->ch_s_tin) { + b = set_cmd_header(b, port, 43); + + ch->ch_s_treq = ch->ch_s_tin; + put_unaligned_be16(ch->ch_s_treq, + b); + b += 2; + } + + /* + * If there is a thread waiting for buffer empty, + * and we are truly empty, wake the thread. + */ + + else if ((ch->ch_flag & CH_EMPTY) != 0 && + (ch->ch_send & RR_TX_BREAK) == 0) { + ch->ch_flag &= ~CH_EMPTY; + + wake_up_interruptible(&ch->ch_flag_wait); + } + } + } + + /* + * If a module select code is needed, drop one in. If space + * was reserved for one, but none is needed, recover the space. + */ + + if (mod != nd->nd_tx_module) { + if (b != mbuf) { + mbuf[-1] = 0xf0 | mod; + nd->nd_tx_module = mod; + } else { + b--; + } + } + } + + /* + * Send a synchronization sequence associated with the last open + * channel that sent data, and remember the time when the data was + * sent. + */ + + in = nd->nd_seq_in; + + if ((send_sync || nd->nd_seq_wait[in] != 0) && lastport >= 0) { + u8 *bb = b; + + /* + * Attempt the use the port that really wanted the sync. + * This gets around a race condition where the "lastport" is in + * the middle of the close() routine, and by the time we + * send this command, it will have already acked the close, and + * thus not send the sync response. + */ + if (wanted_sync_port >= 0) + lastport = wanted_sync_port; + /* + * Set a flag just in case the port is in the middle of a close, + * it will not be permitted to actually close until we get an + * sync response, and clear the flag there. + */ + ch = nd->nd_chan + lastport; + ch->ch_flag |= CH_WAITING_SYNC; + + mod = lastport >> 4; + + if (mod != nd->nd_tx_module) { + bb[0] = 0xf0 + mod; + bb += 1; + + nd->nd_tx_module = mod; + } + + bb = set_cmd_header(bb, lastport, 12); + *bb++ = in; + + nd->nd_seq_size[in] = bb - buf; + nd->nd_seq_time[in] = jiffies; + + if (++in >= SEQ_MAX) + in = 0; + + if (in != nd->nd_seq_out) { + b = bb; + nd->nd_seq_in = in; + nd->nd_unack += b - buf; + } + } + + /* + * If there are no open ports, a sync cannot be sent. + * There is nothing left to wait for anyway, so wake any + * thread waiting for an acknowledgement. + */ + + else if (nd->nd_seq_wait[in] != 0) { + nd->nd_seq_wait[in] = 0; + + wake_up_interruptible(&nd->nd_seq_wque[in]); + } + + /* + * If there is no traffic for an interval of IDLE_MAX, then + * send a single byte packet. + */ + + if (b != buf) { + nd->nd_tx_time = jiffies; + } else if ((ulong)(jiffies - nd->nd_tx_time) >= IDLE_MAX) { + *b++ = 0xf0 | nd->nd_tx_module; + nd->nd_tx_time = jiffies; + } + + n = b - buf; + + if (n >= tsafe) + pr_info("%s - n(%i) >= tsafe(%i)\n", + __func__, n, tsafe); + + if (tsend < 0) + dgrp_dump(buf, n); + + nd->nd_tx_work = work; + + return n; +} + +/* + * dgrp_net_read() + * Data to be sent TO the PortServer from the "async." half of the driver. + */ +static ssize_t dgrp_net_read(struct file *file, char __user *buf, size_t count, + loff_t *ppos) +{ + struct nd_struct *nd; + long n; + u8 *local_buf; + u8 *b; + ssize_t rtn; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + return -ENXIO; + + if (count < UIO_MIN) + return -EINVAL; + + /* + * Only one read/write operation may be in progress at + * any given time. + */ + + /* + * Grab the NET lock. + */ + down(&nd->nd_net_semaphore); + + nd->nd_read_count++; + + nd->nd_tx_ready = 0; + + /* + * Determine the effective size of the buffer. + */ + + if (nd->nd_remain > UIO_BASE) + pr_info_ratelimited("%s - nd_remain(%i) > UIO_BASE\n", + __func__, nd->nd_remain); + + b = local_buf = nd->nd_iobuf + UIO_BASE; + + /* + * Generate data according to the node state. + */ + + switch (nd->nd_state) { + /* + * Initialize the connection. + */ + + case NS_IDLE: + if (nd->nd_mon_buf) + dgrp_monitor_reset(nd); + + /* + * Request a Product ID Packet. + */ + + b[0] = 0xfb; + b[1] = 0x01; + b += 2; + + nd->nd_expect |= NR_IDENT; + + /* + * Request a Server Capability ID Response. + */ + + b[0] = 0xfb; + b[1] = 0x02; + b += 2; + + nd->nd_expect |= NR_CAPABILITY; + + /* + * Request a Server VPD Response. + */ + + b[0] = 0xfb; + b[1] = 0x18; + b += 2; + + nd->nd_expect |= NR_VPD; + + nd->nd_state = NS_WAIT_QUERY; + break; + + /* + * We do serious communication with the server only in + * the READY state. + */ + + case NS_READY: + b = dgrp_send(nd, count) + local_buf; + break; + + /* + * Send off an error after receiving a bogus message + * from the server. + */ + + case NS_SEND_ERROR: + n = strlen(nd->nd_error); + + b[0] = 0xff; + b[1] = n; + memcpy(b + 2, nd->nd_error, n); + b += 2 + n; + + dgrp_net_idle(nd); + /* + * Set the active port count to zero. + */ + dgrp_chan_count(nd, 0); + break; + + default: + break; + } + + n = b - local_buf; + + if (n != 0) { + nd->nd_send_count++; + + nd->nd_tx_byte += n + nd->nd_link.lk_header_size; + nd->nd_tx_charge += n + nd->nd_link.lk_header_size; + } + + rtn = copy_to_user((void __user *)buf, local_buf, n); + if (rtn) { + rtn = -EFAULT; + goto done; + } + + *ppos += n; + + rtn = n; + + if (nd->nd_mon_buf) + dgrp_monitor_data(nd, RPDUMP_CLIENT, local_buf, n); + + /* + * Release the NET lock. + */ +done: + up(&nd->nd_net_semaphore); + + return rtn; +} + +/** + * dgrp_receive() -- decode data packets received from the remote PortServer. + * @nd: pointer to a node structure + */ +static void dgrp_receive(struct nd_struct *nd) +{ + struct ch_struct *ch; + u8 *buf; + u8 *b; + u8 *dbuf; + char *error; + long port; + long dlen; + long plen; + long remain; + long n; + long mlast; + long elast; + long mstat; + long estat; + + char ID[3]; + + nd->nd_tx_time = jiffies; + + ID_TO_CHAR(nd->nd_ID, ID); + + b = buf = nd->nd_iobuf; + remain = nd->nd_remain; + + /* + * Loop to process Realport protocol packets. + */ + + while (remain > 0) { + int n0 = b[0] >> 4; + int n1 = b[0] & 0x0f; + + if (n0 <= 12) { + port = (nd->nd_rx_module << 4) + n1; + + if (port >= nd->nd_chan_count) { + error = "Improper Port Number"; + goto prot_error; + } + + ch = nd->nd_chan + port; + } else { + port = -1; + ch = NULL; + } + + /* + * Process by major packet type. + */ + + switch (n0) { + + /* + * Process 1-byte header data packet. + */ + + case 0: + case 1: + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + dlen = n0 + 1; + plen = dlen + 1; + + dbuf = b + 1; + goto data; + + /* + * Process 2-byte header data packet. + */ + + case 8: + if (remain < 3) + goto done; + + dlen = b[1]; + plen = dlen + 2; + + dbuf = b + 2; + goto data; + + /* + * Process 3-byte header data packet. + */ + + case 9: + if (remain < 4) + goto done; + + dlen = get_unaligned_be16(b + 1); + plen = dlen + 3; + + dbuf = b + 3; + + /* + * Common packet handling code. + */ + +data: + nd->nd_tx_work = 1; + + /* + * Otherwise data should appear only when we are + * in the CS_READY state. + */ + + if (ch->ch_state < CS_READY) { + error = "Data received before RWIN established"; + goto prot_error; + } + + /* + * Assure that the data received is within the + * allowable window. + */ + + n = (ch->ch_s_rwin - ch->ch_s_rin) & 0xffff; + + if (dlen > n) { + error = "Receive data overrun"; + goto prot_error; + } + + /* + * If we received 3 or less characters, + * assume it is a human typing, and set RTIME + * to 10 milliseconds. + * + * If we receive 10 or more characters, + * assume its not a human typing, and set RTIME + * to 100 milliseconds. + */ + + if (ch->ch_edelay != DGRP_RTIME) { + if (ch->ch_rtime != ch->ch_edelay) { + ch->ch_rtime = ch->ch_edelay; + ch->ch_flag |= CH_PARAM; + } + } else if (dlen <= 3) { + if (ch->ch_rtime != 10) { + ch->ch_rtime = 10; + ch->ch_flag |= CH_PARAM; + } + } else { + if (ch->ch_rtime != DGRP_RTIME) { + ch->ch_rtime = DGRP_RTIME; + ch->ch_flag |= CH_PARAM; + } + } + + /* + * If a portion of the packet is outside the + * buffer, shorten the effective length of the + * data packet to be the amount of data received. + */ + + if (remain < plen) + dlen -= plen - remain; + + /* + * Detect if receive flush is now complete. + */ + + if ((ch->ch_flag & CH_RX_FLUSH) != 0 && + ((ch->ch_flush_seq - nd->nd_seq_out) & SEQ_MASK) >= + ((nd->nd_seq_in - nd->nd_seq_out) & SEQ_MASK)) { + ch->ch_flag &= ~CH_RX_FLUSH; + } + + /* + * If we are ready to receive, move the data into + * the receive buffer. + */ + + ch->ch_s_rin = (ch->ch_s_rin + dlen) & 0xffff; + + if (ch->ch_state == CS_READY && + (ch->ch_tun.un_open_count != 0) && + (ch->ch_tun.un_flag & UN_CLOSING) == 0 && + (ch->ch_cflag & CF_CREAD) != 0 && + (ch->ch_flag & (CH_BAUD0 | CH_RX_FLUSH)) == 0 && + (ch->ch_send & RR_RX_FLUSH) == 0) { + + if (ch->ch_rin + dlen >= RBUF_MAX) { + n = RBUF_MAX - ch->ch_rin; + + memcpy(ch->ch_rbuf + ch->ch_rin, dbuf, n); + + ch->ch_rin = 0; + dbuf += n; + dlen -= n; + } + + memcpy(ch->ch_rbuf + ch->ch_rin, dbuf, dlen); + + ch->ch_rin += dlen; + + + /* + * If we are not in fastcook mode, or + * if there is a fastcook thread + * waiting for data, send the data to + * the line discipline. + */ + + if ((ch->ch_flag & CH_FAST_READ) == 0 || + ch->ch_inwait != 0) { + dgrp_input(ch); + } + + /* + * If there is a read thread waiting + * in select, and we are in fastcook + * mode, wake him up. + */ + + if (waitqueue_active(&ch->ch_tun.un_tty->read_wait) && + (ch->ch_flag & CH_FAST_READ) != 0) + wake_up_interruptible(&ch->ch_tun.un_tty->read_wait); + + /* + * Wake any thread waiting in the + * fastcook loop. + */ + + if ((ch->ch_flag & CH_INPUT) != 0) { + ch->ch_flag &= ~CH_INPUT; + + wake_up_interruptible(&ch->ch_flag_wait); + } + } + + /* + * Fabricate and insert a data packet header to + * preceed the remaining data when it comes in. + */ + + if (remain < plen) { + dlen = plen - remain; + b = buf; + + b[0] = 0x90 + n1; + put_unaligned_be16(dlen, b + 1); + + remain = 3; + goto done; + } + break; + + /* + * Handle Window Sequence packets. + */ + + case 10: + plen = 3; + if (remain < plen) + goto done; + + nd->nd_tx_work = 1; + + { + ushort tpos = get_unaligned_be16(b + 1); + + ushort ack = (tpos - ch->ch_s_tpos) & 0xffff; + ushort unack = (ch->ch_s_tin - ch->ch_s_tpos) & 0xffff; + ushort notify = (ch->ch_s_treq - ch->ch_s_tpos) & 0xffff; + + if (ch->ch_state < CS_READY || ack > unack) { + error = "Improper Window Sequence"; + goto prot_error; + } + + ch->ch_s_tpos = tpos; + + if (notify <= ack) + ch->ch_s_treq = tpos; + } + break; + + /* + * Handle Command response packets. + */ + + case 11: + + /* + * RealPort engine fix - 03/11/2004 + * + * This check did not used to be here. + * + * We were using b[1] without verifying that the data + * is actually there and valid. On a split packet, it + * might not be yet. + * + * NOTE: I have never actually seen the failure happen + * under Linux, but since I have seen it occur + * under both Solaris and HP-UX, the assumption + * is that it *could* happen here as well... + */ + if (remain < 2) + goto done; + + + switch (b[1]) { + + /* + * Handle Open Response. + */ + + case 11: + plen = 6; + if (remain < plen) + goto done; + + nd->nd_tx_work = 1; + + { + int req = b[2]; + int resp = b[3]; + port = get_unaligned_be16(b + 4); + + if (port >= nd->nd_chan_count) { + error = "Open channel number out of range"; + goto prot_error; + } + + ch = nd->nd_chan + port; + + /* + * How we handle an open response depends primarily + * on our current channel state. + */ + + switch (ch->ch_state) { + case CS_IDLE: + + /* + * Handle a delayed open. + */ + + if (ch->ch_otype_waiting != 0 && + req == ch->ch_otype_waiting && + resp == 0) { + ch->ch_otype = req; + ch->ch_otype_waiting = 0; + ch->ch_state = CS_SEND_QUERY; + break; + } + goto open_error; + + case CS_WAIT_OPEN: + + /* + * Handle the open response. + */ + + if (req == ch->ch_otype) { + switch (resp) { + + /* + * On successful response, open the + * port and proceed normally. + */ + + case 0: + ch->ch_state = CS_SEND_QUERY; + break; + + /* + * On a busy response to a persistent open, + * remember that the open is pending. + */ + + case 1: + case 2: + if (req != OTYPE_IMMEDIATE) { + ch->ch_otype_waiting = req; + ch->ch_state = CS_IDLE; + break; + } + + /* + * Otherwise the server open failed. If + * the Unix port is open, hang it up. + */ + + default: + if (ch->ch_open_count != 0) { + ch->ch_flag |= CH_HANGUP; + dgrp_carrier(ch); + ch->ch_state = CS_IDLE; + break; + } + + ch->ch_open_error = resp; + ch->ch_state = CS_IDLE; + + wake_up_interruptible(&ch->ch_flag_wait); + } + break; + } + + /* + * Handle delayed response arrival preceeding + * the open response we are waiting for. + */ + + if (ch->ch_otype_waiting != 0 && + req == ch->ch_otype_waiting && + resp == 0) { + ch->ch_otype = ch->ch_otype_waiting; + ch->ch_otype_waiting = 0; + ch->ch_state = CS_WAIT_FAIL; + break; + } + goto open_error; + + + case CS_WAIT_FAIL: + + /* + * Handle response to immediate open arriving + * after a delayed open success. + */ + + if (req == OTYPE_IMMEDIATE) { + ch->ch_state = CS_SEND_QUERY; + break; + } + goto open_error; + + + case CS_WAIT_CANCEL: + /* + * Handle delayed open response arriving before + * the cancel response. + */ + + if (req == ch->ch_otype_waiting && + resp == 0) { + ch->ch_otype_waiting = 0; + break; + } + + /* + * Handle cancel response. + */ + + if (req == 4 && resp == 0) { + ch->ch_otype_waiting = 0; + ch->ch_state = CS_IDLE; + break; + } + goto open_error; + + + case CS_WAIT_CLOSE: + /* + * Handle a successful response to a port + * close. + */ + + if (req >= 3) { + ch->ch_state = CS_IDLE; + break; + } + goto open_error; + +open_error: + default: + { + error = "Improper Open Response"; + goto prot_error; + } + } + } + break; + + /* + * Handle Synchronize Response. + */ + + case 13: + plen = 3; + if (remain < plen) + goto done; + { + int seq = b[2]; + int s; + + /* + * If channel was waiting for this sync response, + * unset the flag, and wake up anyone waiting + * on the event. + */ + if (ch->ch_flag & CH_WAITING_SYNC) { + ch->ch_flag &= ~(CH_WAITING_SYNC); + wake_up_interruptible(&ch->ch_flag_wait); + } + + if (((seq - nd->nd_seq_out) & SEQ_MASK) >= + ((nd->nd_seq_in - nd->nd_seq_out) & SEQ_MASK)) { + break; + } + + for (s = nd->nd_seq_out;; s = (s + 1) & SEQ_MASK) { + if (nd->nd_seq_wait[s] != 0) { + nd->nd_seq_wait[s] = 0; + + wake_up_interruptible(&nd->nd_seq_wque[s]); + } + + nd->nd_unack -= nd->nd_seq_size[s]; + + if (s == seq) + break; + } + + nd->nd_seq_out = (seq + 1) & SEQ_MASK; + } + break; + + /* + * Handle Sequence Response. + */ + + case 15: + plen = 6; + if (remain < plen) + goto done; + + { + /* Record that we have received the Sequence + * Response, but we aren't interested in the + * sequence numbers. We were using RIN like it + * was ROUT and that was causing problems, + * fixed 7-13-2001 David Fries. See comment in + * drp.h for ch_s_rin variable. + int rin = get_unaligned_be16(b + 2); + int tpos = get_unaligned_be16(b + 4); + */ + + ch->ch_send &= ~RR_SEQUENCE; + ch->ch_expect &= ~RR_SEQUENCE; + } + goto check_query; + + /* + * Handle Status Response. + */ + + case 17: + plen = 5; + if (remain < plen) + goto done; + + { + ch->ch_s_elast = get_unaligned_be16(b + 2); + ch->ch_s_mlast = b[4]; + + ch->ch_expect &= ~RR_STATUS; + ch->ch_send &= ~RR_STATUS; + + /* + * CH_PHYS_CD is cleared because something _could_ be + * waiting for the initial sense of carrier... and if + * carrier is high immediately, we want to be sure to + * wake them as soon as possible. + */ + ch->ch_flag &= ~CH_PHYS_CD; + + dgrp_carrier(ch); + } + goto check_query; + + /* + * Handle Line Error Response. + */ + + case 19: + plen = 14; + if (remain < plen) + goto done; + + break; + + /* + * Handle Buffer Response. + */ + + case 21: + plen = 6; + if (remain < plen) + goto done; + + { + ch->ch_s_rsize = get_unaligned_be16(b + 2); + ch->ch_s_tsize = get_unaligned_be16(b + 4); + + ch->ch_send &= ~RR_BUFFER; + ch->ch_expect &= ~RR_BUFFER; + } + goto check_query; + + /* + * Handle Port Capability Response. + */ + + case 23: + plen = 32; + if (remain < plen) + goto done; + + { + ch->ch_send &= ~RR_CAPABILITY; + ch->ch_expect &= ~RR_CAPABILITY; + } + + /* + * When all queries are complete, set those parameters + * derived from the query results, then transition + * to the READY state. + */ + +check_query: + if (ch->ch_state == CS_WAIT_QUERY && + (ch->ch_expect & (RR_SEQUENCE | + RR_STATUS | + RR_BUFFER | + RR_CAPABILITY)) == 0) { + ch->ch_tmax = ch->ch_s_tsize / 4; + + if (ch->ch_edelay == DGRP_TTIME) + ch->ch_ttime = DGRP_TTIME; + else + ch->ch_ttime = ch->ch_edelay; + + ch->ch_rmax = ch->ch_s_rsize / 4; + + if (ch->ch_edelay == DGRP_RTIME) + ch->ch_rtime = DGRP_RTIME; + else + ch->ch_rtime = ch->ch_edelay; + + ch->ch_rlow = 2 * ch->ch_s_rsize / 8; + ch->ch_rhigh = 6 * ch->ch_s_rsize / 8; + + ch->ch_state = CS_READY; + + nd->nd_tx_work = 1; + wake_up_interruptible(&ch->ch_flag_wait); + + } + break; + + default: + goto decode_error; + } + break; + + /* + * Handle Events. + */ + + case 12: + plen = 4; + if (remain < plen) + goto done; + + mlast = ch->ch_s_mlast; + elast = ch->ch_s_elast; + + mstat = ch->ch_s_mlast = b[1]; + estat = ch->ch_s_elast = get_unaligned_be16(b + 2); + + /* + * Handle modem changes. + */ + + if (((mstat ^ mlast) & DM_CD) != 0) + dgrp_carrier(ch); + + + /* + * Handle received break. + */ + + if ((estat & ~elast & EV_RXB) != 0 && + (ch->ch_tun.un_open_count != 0) && + I_BRKINT(ch->ch_tun.un_tty) && + !(I_IGNBRK(ch->ch_tun.un_tty))) { + + tty_buffer_request_room(ch->ch_tun.un_tty, 1); + tty_insert_flip_char(ch->ch_tun.un_tty, 0, TTY_BREAK); + tty_flip_buffer_push(ch->ch_tun.un_tty); + + } + + /* + * On transmit break complete, if more break traffic + * is waiting then send it. Otherwise wake any threads + * waiting for transmitter empty. + */ + + if ((~estat & elast & EV_TXB) != 0 && + (ch->ch_expect & RR_TX_BREAK) != 0) { + + nd->nd_tx_work = 1; + + ch->ch_expect &= ~RR_TX_BREAK; + + if (ch->ch_break_time != 0) { + ch->ch_send |= RR_TX_BREAK; + } else { + ch->ch_send &= ~RR_TX_BREAK; + ch->ch_flag &= ~CH_TX_BREAK; + wake_up_interruptible(&ch->ch_flag_wait); + } + } + break; + + case 13: + case 14: + error = "Unrecognized command"; + goto prot_error; + + /* + * Decode Special Codes. + */ + + case 15: + switch (n1) { + /* + * One byte module select. + */ + + case 0: + case 1: + case 2: + case 3: + case 4: + case 5: + case 6: + case 7: + plen = 1; + nd->nd_rx_module = n1; + break; + + /* + * Two byte module select. + */ + + case 8: + plen = 2; + if (remain < plen) + goto done; + + nd->nd_rx_module = b[1]; + break; + + /* + * ID Request packet. + */ + + case 11: + if (remain < 4) + goto done; + + plen = get_unaligned_be16(b + 2); + + if (plen < 12 || plen > 1000) { + error = "Response Packet length error"; + goto prot_error; + } + + nd->nd_tx_work = 1; + + switch (b[1]) { + /* + * Echo packet. + */ + + case 0: + nd->nd_send |= NR_ECHO; + break; + + /* + * ID Response packet. + */ + + case 1: + nd->nd_send |= NR_IDENT; + break; + + /* + * ID Response packet. + */ + + case 32: + nd->nd_send |= NR_PASSWORD; + break; + + } + break; + + /* + * Various node-level response packets. + */ + + case 12: + if (remain < 4) + goto done; + + plen = get_unaligned_be16(b + 2); + + if (plen < 4 || plen > 1000) { + error = "Response Packet length error"; + goto prot_error; + } + + nd->nd_tx_work = 1; + + switch (b[1]) { + /* + * Echo packet. + */ + + case 0: + nd->nd_expect &= ~NR_ECHO; + break; + + /* + * Product Response Packet. + */ + + case 1: + { + int desclen; + + nd->nd_hw_ver = (b[8] << 8) | b[9]; + nd->nd_sw_ver = (b[10] << 8) | b[11]; + nd->nd_hw_id = b[6]; + desclen = ((plen - 12) > MAX_DESC_LEN) ? MAX_DESC_LEN : + plen - 12; + strncpy(nd->nd_ps_desc, b + 12, desclen); + nd->nd_ps_desc[desclen] = 0; + } + + nd->nd_expect &= ~NR_IDENT; + break; + + /* + * Capability Response Packet. + */ + + case 2: + { + int nn = get_unaligned_be16(b + 4); + + if (nn > CHAN_MAX) + nn = CHAN_MAX; + + dgrp_chan_count(nd, nn); + } + + nd->nd_expect &= ~NR_CAPABILITY; + break; + + /* + * VPD Response Packet. + */ + + case 15: + /* + * NOTE: case 15 is here ONLY because the EtherLite + * is broken, and sends a response to 24 back as 15. + * To resolve this, the EtherLite firmware is now + * fixed to send back 24 correctly, but, for backwards + * compatibility, we now have reserved 15 for the + * bad EtherLite response to 24 as well. + */ + + /* Fallthru! */ + + case 24: + + /* + * If the product doesn't support VPD, + * it will send back a null IDRESP, + * which is a length of 4 bytes. + */ + if (plen > 4) { + memcpy(nd->nd_vpd, b + 4, min(plen - 4, (long) VPDSIZE)); + nd->nd_vpd_len = min(plen - 4, (long) VPDSIZE); + } + + nd->nd_expect &= ~NR_VPD; + break; + + default: + goto decode_error; + } + + if (nd->nd_expect == 0 && + nd->nd_state == NS_WAIT_QUERY) { + nd->nd_state = NS_READY; + } + break; + + /* + * Debug packet. + */ + + case 14: + if (remain < 4) + goto done; + + plen = get_unaligned_be16(b + 2) + 4; + + if (plen > 1000) { + error = "Debug Packet too large"; + goto prot_error; + } + + if (remain < plen) + goto done; + break; + + /* + * Handle reset packet. + */ + + case 15: + if (remain < 2) + goto done; + + plen = 2 + b[1]; + + if (remain < plen) + goto done; + + nd->nd_tx_work = 1; + + n = b[plen]; + b[plen] = 0; + + b[plen] = n; + + error = "Client Reset Acknowledge"; + goto prot_error; + + default: + goto decode_error; + } + break; + + default: + goto decode_error; + } + + b += plen; + remain -= plen; + } + + /* + * When the buffer is exhausted, copy any data left at the + * top of the buffer back down to the bottom for the next + * read request. + */ + +done: + if (remain > 0 && b != buf) + memcpy(buf, b, remain); + + nd->nd_remain = remain; + return; + +/* + * Handle a decode error. + */ + +decode_error: + error = "Protocol decode error"; + +/* + * Handle a general protocol error. + */ + +prot_error: + nd->nd_remain = 0; + nd->nd_state = NS_SEND_ERROR; + nd->nd_error = error; +} + +/* + * dgrp_net_write() -- write data to the network device. + * + * A zero byte write indicates that the connection to the RealPort + * device has been broken. + * + * A non-zero write indicates data from the RealPort device. + */ +static ssize_t dgrp_net_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct nd_struct *nd; + ssize_t rtn = 0; + long n; + long total = 0; + + /* + * Get the node pointer, and quit if it doesn't exist. + */ + nd = (struct nd_struct *)(file->private_data); + if (!nd) + return -ENXIO; + + /* + * Grab the NET lock. + */ + down(&nd->nd_net_semaphore); + + nd->nd_write_count++; + + /* + * Handle disconnect. + */ + + if (count == 0) { + dgrp_net_idle(nd); + /* + * Set the active port count to zero. + */ + dgrp_chan_count(nd, 0); + goto unlock; + } + + /* + * Loop to process entire receive packet. + */ + + while (count > 0) { + n = UIO_MAX - nd->nd_remain; + + if (n > count) + n = count; + + nd->nd_rx_byte += n + nd->nd_link.lk_header_size; + + rtn = copy_from_user(nd->nd_iobuf + nd->nd_remain, + (void __user *) buf + total, n); + if (rtn) { + rtn = -EFAULT; + goto unlock; + } + + *ppos += n; + + total += n; + + count -= n; + + if (nd->nd_mon_buf) + dgrp_monitor_data(nd, RPDUMP_SERVER, + nd->nd_iobuf + nd->nd_remain, n); + + nd->nd_remain += n; + + dgrp_receive(nd); + } + + rtn = total; + +unlock: + /* + * Release the NET lock. + */ + up(&nd->nd_net_semaphore); + + return rtn; +} + + +/* + * dgrp_net_select() + * Determine whether a device is ready to be read or written to, and + * sleep if not. + */ +static unsigned int dgrp_net_select(struct file *file, + struct poll_table_struct *table) +{ + unsigned int retval = 0; + struct nd_struct *nd = file->private_data; + + poll_wait(file, &nd->nd_tx_waitq, table); + + if (nd->nd_tx_ready) + retval |= POLLIN | POLLRDNORM; /* Conditionally readable */ + + retval |= POLLOUT | POLLWRNORM; /* Always writeable */ + + return retval; +} + +/* + * dgrp_net_ioctl + * + * Implement those functions which allow the network daemon to control + * the network parameters in the driver. The ioctls include ones to + * get and set the link speed parameters for the PortServer. + */ +static long dgrp_net_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) +{ + struct nd_struct *nd; + int rtn = 0; + long size = _IOC_SIZE(cmd); + struct link_struct link; + + nd = file->private_data; + + if (_IOC_DIR(cmd) & _IOC_READ) + rtn = access_ok(VERIFY_WRITE, (void __user *) arg, size); + else if (_IOC_DIR(cmd) & _IOC_WRITE) + rtn = access_ok(VERIFY_READ, (void __user *) arg, size); + + if (!rtn) + return rtn; + + switch (cmd) { + case DIGI_SETLINK: + if (size != sizeof(struct link_struct)) + return -EINVAL; + + if (copy_from_user((void *)(&link), (void __user *) arg, size)) + return -EFAULT; + + if (link.lk_fast_rate < 9600) + link.lk_fast_rate = 9600; + + if (link.lk_slow_rate < 2400) + link.lk_slow_rate = 2400; + + if (link.lk_fast_rate > 10000000) + link.lk_fast_rate = 10000000; + + if (link.lk_slow_rate > link.lk_fast_rate) + link.lk_slow_rate = link.lk_fast_rate; + + if (link.lk_fast_delay > 2000) + link.lk_fast_delay = 2000; + + if (link.lk_slow_delay > 10000) + link.lk_slow_delay = 10000; + + if (link.lk_fast_delay < 60) + link.lk_fast_delay = 60; + + if (link.lk_slow_delay < link.lk_fast_delay) + link.lk_slow_delay = link.lk_fast_delay; + + if (link.lk_header_size < 2) + link.lk_header_size = 2; + + if (link.lk_header_size > 128) + link.lk_header_size = 128; + + link.lk_fast_rate /= 8 * 1000 / dgrp_poll_tick; + link.lk_slow_rate /= 8 * 1000 / dgrp_poll_tick; + + link.lk_fast_delay /= dgrp_poll_tick; + link.lk_slow_delay /= dgrp_poll_tick; + + nd->nd_link = link; + + break; + + case DIGI_GETLINK: + if (size != sizeof(struct link_struct)) + return -EINVAL; + + if (copy_to_user((void __user *)arg, (void *)(&nd->nd_link), + size)) + return -EFAULT; + + break; + + default: + return -EINVAL; + + } + + return 0; +} + +/** + * dgrp_poll_handler() -- handler for poll timer + * + * As each timer expires, it determines (a) whether the "transmit" + * waiter needs to be woken up, and (b) whether the poller needs to + * be rescheduled. + */ +void dgrp_poll_handler(unsigned long arg) +{ + struct dgrp_poll_data *poll_data; + struct nd_struct *nd; + struct link_struct *lk; + ulong time; + ulong poll_time; + ulong freq; + ulong lock_flags; + + poll_data = (struct dgrp_poll_data *) arg; + freq = 1000 / poll_data->poll_tick; + poll_data->poll_round += 17; + + if (poll_data->poll_round >= freq) + poll_data->poll_round -= freq; + + /* + * Loop to process all open nodes. + * + * For each node, determine the rate at which it should + * be transmitting data. Then if the node should wake up + * and transmit data now, enable the net receive select + * to get the transmit going. + */ + + list_for_each_entry(nd, &nd_struct_list, list) { + + lk = &nd->nd_link; + + /* + * Decrement statistics. These are only for use with + * KME, so don't worry that the operations are done + * unlocked, and so the results are occassionally wrong. + */ + + nd->nd_read_count -= (nd->nd_read_count + + poll_data->poll_round) / freq; + nd->nd_write_count -= (nd->nd_write_count + + poll_data->poll_round) / freq; + nd->nd_send_count -= (nd->nd_send_count + + poll_data->poll_round) / freq; + nd->nd_tx_byte -= (nd->nd_tx_byte + + poll_data->poll_round) / freq; + nd->nd_rx_byte -= (nd->nd_rx_byte + + poll_data->poll_round) / freq; + + /* + * Wake the daemon to transmit data only when there is + * enough byte credit to send data. + * + * The results are approximate because the operations + * are performed unlocked, and we are inspecting + * data asynchronously updated elsewhere. The whole + * thing is just approximation anyway, so that should + * be okay. + */ + + if (lk->lk_slow_rate >= UIO_MAX) { + + nd->nd_delay = 0; + nd->nd_rate = UIO_MAX; + + nd->nd_tx_deposit = nd->nd_tx_charge + 3 * UIO_MAX; + nd->nd_tx_credit = 3 * UIO_MAX; + + } else { + + long rate; + long delay; + long deposit; + long charge; + long size; + long excess; + + long seq_in = nd->nd_seq_in; + long seq_out = nd->nd_seq_out; + + /* + * If there are no outstanding packets, run at the + * fastest rate. + */ + + if (seq_in == seq_out) { + delay = 0; + rate = lk->lk_fast_rate; + } + + /* + * Otherwise compute the transmit rate based on the + * delay since the oldest packet. + */ + + else { + /* + * The actual delay is computed as the + * time since the oldest unacknowledged + * packet was sent, minus the time it + * took to send that packet to the server. + */ + + delay = ((jiffies - nd->nd_seq_time[seq_out]) + - (nd->nd_seq_size[seq_out] / + lk->lk_fast_rate)); + + /* + * If the delay is less than the "fast" + * delay, transmit full speed. If greater + * than the "slow" delay, transmit at the + * "slow" speed. In between, interpolate + * between the fast and slow speeds. + */ + + rate = + (delay <= lk->lk_fast_delay ? + lk->lk_fast_rate : + delay >= lk->lk_slow_delay ? + lk->lk_slow_rate : + (lk->lk_slow_rate + + (lk->lk_slow_delay - delay) * + (lk->lk_fast_rate - lk->lk_slow_rate) / + (lk->lk_slow_delay - lk->lk_fast_delay) + ) + ); + } + + nd->nd_delay = delay; + nd->nd_rate = rate; + + /* + * Increase the transmit credit by depositing the + * current transmit rate. + */ + + deposit = nd->nd_tx_deposit; + charge = nd->nd_tx_charge; + + deposit += rate; + + /* + * If the available transmit credit becomes too large, + * reduce the deposit to correct the value. + * + * Too large is the max of: + * 6 times the header size + * 3 times the current transmit rate. + */ + + size = 2 * nd->nd_link.lk_header_size; + + if (size < rate) + size = rate; + + size *= 3; + + excess = deposit - charge - size; + + if (excess > 0) + deposit -= excess; + + nd->nd_tx_deposit = deposit; + nd->nd_tx_credit = deposit - charge; + + /* + * Wake the transmit task only if the transmit credit + * is at least 3 times the transmit header size. + */ + + size = 3 * lk->lk_header_size; + + if (nd->nd_tx_credit < size) + continue; + } + + + /* + * Enable the READ select to wake the daemon if there + * is useful work for the drp_read routine to perform. + */ + + if (waitqueue_active(&nd->nd_tx_waitq) && + (nd->nd_tx_work != 0 || + (ulong)(jiffies - nd->nd_tx_time) >= IDLE_MAX)) { + nd->nd_tx_ready = 1; + + wake_up_interruptible(&nd->nd_tx_waitq); + + /* not needed */ + /* nd->nd_flag &= ~ND_SELECT; */ + } + } + + + /* + * Schedule ourself back at the nominal wakeup interval. + */ + spin_lock_irqsave(&poll_data->poll_lock, lock_flags); + + poll_data->node_active_count--; + if (poll_data->node_active_count > 0) { + poll_data->node_active_count++; + poll_time = poll_data->timer.expires + + poll_data->poll_tick * HZ / 1000; + + time = poll_time - jiffies; + + if (time >= 2 * poll_data->poll_tick) + poll_time = jiffies + dgrp_poll_tick * HZ / 1000; + + poll_data->timer.expires = poll_time; + add_timer(&poll_data->timer); + } + + spin_unlock_irqrestore(&poll_data->poll_lock, lock_flags); +} diff --git a/drivers/staging/dgrp/dgrp_ports_ops.c b/drivers/staging/dgrp/dgrp_ports_ops.c new file mode 100644 index 00000000000..cd1fc208862 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_ports_ops.c @@ -0,0 +1,170 @@ +/* + * + * Copyright 1999-2000 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* + * + * Filename: + * + * dgrp_ports_ops.c + * + * Description: + * + * Handle the file operations required for the /proc/dgrp/ports/... + * devices. Basically gathers tty status for the node and returns it. + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include +#include + +#include "dgrp_common.h" + +/* File operation declarations */ +static int dgrp_ports_open(struct inode *, struct file *); + +static const struct file_operations ports_ops = { + .owner = THIS_MODULE, + .open = dgrp_ports_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release +}; + +static struct inode_operations ports_inode_ops = { + .permission = dgrp_inode_permission +}; + + +void dgrp_register_ports_hook(struct proc_dir_entry *de) +{ + struct nd_struct *node = de->data; + + de->proc_iops = &ports_inode_ops; + de->proc_fops = &ports_ops; + node->nd_ports_de = de; +} + +static void *dgrp_ports_seq_start(struct seq_file *seq, loff_t *pos) +{ + if (*pos == 0) + seq_puts(seq, "#num tty_open pr_open tot_wait MSTAT IFLAG OFLAG CFLAG BPS DIGIFLAGS\n"); + + return pos; +} + +static void *dgrp_ports_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct nd_struct *nd = seq->private; + + if (*pos >= nd->nd_chan_count) + return NULL; + + *pos += 1; + + return pos; +} + +static void dgrp_ports_seq_stop(struct seq_file *seq, void *v) +{ +} + +static int dgrp_ports_seq_show(struct seq_file *seq, void *v) +{ + loff_t *pos = v; + struct nd_struct *nd; + struct ch_struct *ch; + struct un_struct *tun, *pun; + unsigned int totcnt; + + nd = seq->private; + if (!nd) + return 0; + + if (*pos >= nd->nd_chan_count) + return 0; + + ch = &nd->nd_chan[*pos]; + tun = &ch->ch_tun; + pun = &ch->ch_pun; + + /* + * If port is not open and no one is waiting to + * open it, the modem signal values can't be + * trusted, and will be zeroed. + */ + totcnt = tun->un_open_count + + pun->un_open_count + + ch->ch_wait_count[0] + + ch->ch_wait_count[1] + + ch->ch_wait_count[2]; + + seq_printf(seq, "%02d %02d %02d %02d 0x%04X 0x%04X 0x%04X 0x%04X %-6d 0x%04X\n", + (int) *pos, + tun->un_open_count, + pun->un_open_count, + ch->ch_wait_count[0] + + ch->ch_wait_count[1] + + ch->ch_wait_count[2], + (totcnt ? ch->ch_s_mlast : 0), + ch->ch_s_iflag, + ch->ch_s_oflag, + ch->ch_s_cflag, + (ch->ch_s_brate ? (1843200 / ch->ch_s_brate) : 0), + ch->ch_digi.digi_flags); + + return 0; +} + +static const struct seq_operations ports_seq_ops = { + .start = dgrp_ports_seq_start, + .next = dgrp_ports_seq_next, + .stop = dgrp_ports_seq_stop, + .show = dgrp_ports_seq_show, +}; + +/** + * dgrp_ports_open -- open the /proc/dgrp/ports/... device + * @inode: struct inode * + * @file: struct file * + * + * Open function to open the /proc/dgrp/ports device for a PortServer. + * This is the open function for struct file_operations + */ +static int dgrp_ports_open(struct inode *inode, struct file *file) +{ + struct seq_file *seq; + int rtn; + + rtn = seq_open(file, &ports_seq_ops); + if (!rtn) { + seq = file->private_data; + seq->private = PDE(inode)->data; + } + + return rtn; +} diff --git a/drivers/staging/dgrp/dgrp_specproc.c b/drivers/staging/dgrp/dgrp_specproc.c new file mode 100644 index 00000000000..259d23aa6c2 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_specproc.c @@ -0,0 +1,821 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * James Puzzo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_specproc.c + * + * Description: + * + * Handle the "config" proc entry for the linux realport device driver + * and provide slots for the "net" and "mon" devices + * + * Author: + * + * James A. Puzzo + * + */ + +#include +#include +#include +#include +#include +#include +#include + +#include "dgrp_common.h" + +static struct dgrp_proc_entry dgrp_table[]; +static struct proc_dir_entry *dgrp_proc_dir_entry; + +static int dgrp_add_id(long id); +static int dgrp_remove_nd(struct nd_struct *nd); +static void unregister_dgrp_device(struct proc_dir_entry *de); +static void register_dgrp_device(struct nd_struct *node, + struct proc_dir_entry *root, + void (*register_hook)(struct proc_dir_entry *de)); + +/* File operation declarations */ +static int dgrp_gen_proc_open(struct inode *, struct file *); +static int dgrp_gen_proc_close(struct inode *, struct file *); +static int parse_write_config(char *); + + +static const struct file_operations dgrp_proc_file_ops = { + .owner = THIS_MODULE, + .open = dgrp_gen_proc_open, + .release = dgrp_gen_proc_close, +}; + +static struct inode_operations proc_inode_ops = { + .permission = dgrp_inode_permission +}; + + +static void register_proc_table(struct dgrp_proc_entry *, + struct proc_dir_entry *); +static void unregister_proc_table(struct dgrp_proc_entry *, + struct proc_dir_entry *); + +static struct dgrp_proc_entry dgrp_net_table[]; +static struct dgrp_proc_entry dgrp_mon_table[]; +static struct dgrp_proc_entry dgrp_ports_table[]; +static struct dgrp_proc_entry dgrp_dpa_table[]; + +static ssize_t config_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *pos); + +static int nodeinfo_proc_open(struct inode *inode, struct file *file); +static int info_proc_open(struct inode *inode, struct file *file); +static int config_proc_open(struct inode *inode, struct file *file); + +static struct file_operations config_proc_file_ops = { + .owner = THIS_MODULE, + .open = config_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, + .write = config_proc_write +}; + +static struct file_operations info_proc_file_ops = { + .owner = THIS_MODULE, + .open = info_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static struct file_operations nodeinfo_proc_file_ops = { + .owner = THIS_MODULE, + .open = nodeinfo_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static struct dgrp_proc_entry dgrp_table[] = { + { + .id = DGRP_CONFIG, + .name = "config", + .mode = 0644, + .proc_file_ops = &config_proc_file_ops, + }, + { + .id = DGRP_INFO, + .name = "info", + .mode = 0644, + .proc_file_ops = &info_proc_file_ops, + }, + { + .id = DGRP_NODEINFO, + .name = "nodeinfo", + .mode = 0644, + .proc_file_ops = &nodeinfo_proc_file_ops, + }, + { + .id = DGRP_NETDIR, + .name = "net", + .mode = 0500, + .child = dgrp_net_table + }, + { + .id = DGRP_MONDIR, + .name = "mon", + .mode = 0500, + .child = dgrp_mon_table + }, + { + .id = DGRP_PORTSDIR, + .name = "ports", + .mode = 0500, + .child = dgrp_ports_table + }, + { + .id = DGRP_DPADIR, + .name = "dpa", + .mode = 0500, + .child = dgrp_dpa_table + } +}; + +static struct proc_dir_entry *net_entry_pointer; +static struct proc_dir_entry *mon_entry_pointer; +static struct proc_dir_entry *dpa_entry_pointer; +static struct proc_dir_entry *ports_entry_pointer; + +static struct dgrp_proc_entry dgrp_net_table[] = { + {0} +}; + +static struct dgrp_proc_entry dgrp_mon_table[] = { + {0} +}; + +static struct dgrp_proc_entry dgrp_ports_table[] = { + {0} +}; + +static struct dgrp_proc_entry dgrp_dpa_table[] = { + {0} +}; + +void dgrp_unregister_proc(void) +{ + unregister_proc_table(dgrp_table, dgrp_proc_dir_entry); + net_entry_pointer = NULL; + mon_entry_pointer = NULL; + dpa_entry_pointer = NULL; + ports_entry_pointer = NULL; + + if (dgrp_proc_dir_entry) { + remove_proc_entry(dgrp_proc_dir_entry->name, + dgrp_proc_dir_entry->parent); + dgrp_proc_dir_entry = NULL; + } + +} + +void dgrp_register_proc(void) +{ + /* + * Register /proc/dgrp + */ + dgrp_proc_dir_entry = proc_create("dgrp", S_IFDIR, NULL, + &dgrp_proc_file_ops); + register_proc_table(dgrp_table, dgrp_proc_dir_entry); +} + +/* + * /proc/sys support + */ +static int dgrp_proc_match(int len, const char *name, struct proc_dir_entry *de) +{ + if (!de || !de->low_ino) + return 0; + if (de->namelen != len) + return 0; + return !memcmp(name, de->name, len); +} + + +/* + * Scan the entries in table and add them all to /proc at the position + * referred to by "root" + */ +static void register_proc_table(struct dgrp_proc_entry *table, + struct proc_dir_entry *root) +{ + struct proc_dir_entry *de; + int len; + mode_t mode; + + for (; table->id; table++) { + /* Can't do anything without a proc name. */ + if (!table->name) + continue; + + /* Maybe we can't do anything with it... */ + if (!table->proc_file_ops && + !table->child) { + pr_warn("dgrp: Can't register %s\n", + table->name); + continue; + } + + len = strlen(table->name); + mode = table->mode; + + de = NULL; + if (!table->child) + mode |= S_IFREG; + else { + mode |= S_IFDIR; + for (de = root->subdir; de; de = de->next) { + if (dgrp_proc_match(len, table->name, de)) + break; + } + /* If the subdir exists already, de is non-NULL */ + } + + if (!de) { + de = create_proc_entry(table->name, mode, root); + if (!de) + continue; + de->data = (void *) table; + if (!table->child) { + de->proc_iops = &proc_inode_ops; + if (table->proc_file_ops) + de->proc_fops = table->proc_file_ops; + else + de->proc_fops = &dgrp_proc_file_ops; + } + } + table->de = de; + if (de->mode & S_IFDIR) + register_proc_table(table->child, de); + + if (table->id == DGRP_NETDIR) + net_entry_pointer = de; + + if (table->id == DGRP_MONDIR) + mon_entry_pointer = de; + + if (table->id == DGRP_DPADIR) + dpa_entry_pointer = de; + + if (table->id == DGRP_PORTSDIR) + ports_entry_pointer = de; + } +} + +/* + * Unregister a /proc sysctl table and any subdirectories. + */ +static void unregister_proc_table(struct dgrp_proc_entry *table, + struct proc_dir_entry *root) +{ + struct proc_dir_entry *de; + struct nd_struct *tmp; + + list_for_each_entry(tmp, &nd_struct_list, list) { + if ((table == dgrp_net_table) && (tmp->nd_net_de)) { + unregister_dgrp_device(tmp->nd_net_de); + dgrp_remove_node_class_sysfs_files(tmp); + } + + if ((table == dgrp_mon_table) && (tmp->nd_mon_de)) + unregister_dgrp_device(tmp->nd_mon_de); + + if ((table == dgrp_dpa_table) && (tmp->nd_dpa_de)) + unregister_dgrp_device(tmp->nd_dpa_de); + + if ((table == dgrp_ports_table) && (tmp->nd_ports_de)) + unregister_dgrp_device(tmp->nd_ports_de); + } + + for (; table->id; table++) { + de = table->de; + + if (!de) + continue; + if (de->mode & S_IFDIR) { + if (!table->child) { + pr_alert("dgrp: malformed sysctl tree on free\n"); + continue; + } + unregister_proc_table(table->child, de); + + /* Don't unregister directories which still have entries */ + if (de->subdir) + continue; + } + + /* Don't unregister proc entries that are still being used.. */ + if ((atomic_read(&de->count)) != 1) { + pr_alert("proc entry %s in use, not removing\n", + de->name); + continue; + } + + remove_proc_entry(de->name, de->parent); + table->de = NULL; + } +} + +static int dgrp_gen_proc_open(struct inode *inode, struct file *file) +{ + struct proc_dir_entry *de; + struct dgrp_proc_entry *entry; + int ret = 0; + + de = (struct proc_dir_entry *) PDE(file->f_dentry->d_inode); + if (!de || !de->data) { + ret = -ENXIO; + goto done; + } + + entry = (struct dgrp_proc_entry *) de->data; + if (!entry) { + ret = -ENXIO; + goto done; + } + + down(&entry->excl_sem); + + if (entry->excl_cnt) + ret = -EBUSY; + else + entry->excl_cnt++; + + up(&entry->excl_sem); + +done: + return ret; +} + +static int dgrp_gen_proc_close(struct inode *inode, struct file *file) +{ + struct proc_dir_entry *de; + struct dgrp_proc_entry *entry; + + de = (struct proc_dir_entry *) PDE(file->f_dentry->d_inode); + if (!de || !de->data) + goto done; + + entry = (struct dgrp_proc_entry *) de->data; + if (!entry) + goto done; + + down(&entry->excl_sem); + + if (entry->excl_cnt) + entry->excl_cnt = 0; + + up(&entry->excl_sem); + +done: + return 0; +} + +static void *config_proc_start(struct seq_file *m, loff_t *pos) +{ + return seq_list_start_head(&nd_struct_list, *pos); +} + +static void *config_proc_next(struct seq_file *p, void *v, loff_t *pos) +{ + return seq_list_next(v, &nd_struct_list, pos); +} + +static void config_proc_stop(struct seq_file *m, void *v) +{ +} + +static int config_proc_show(struct seq_file *m, void *v) +{ + struct nd_struct *nd; + char tmp_id[4]; + + if (v == &nd_struct_list) { + seq_puts(m, "#-----------------------------------------------------------------------------\n"); + seq_puts(m, "# Avail\n"); + seq_puts(m, "# ID Major State Ports\n"); + return 0; + } + + nd = list_entry(v, struct nd_struct, list); + + ID_TO_CHAR(nd->nd_ID, tmp_id); + + seq_printf(m, " %-2.2s %-5ld %-10.10s %-5d\n", + tmp_id, + nd->nd_major, + ND_STATE_STR(nd->nd_state), + nd->nd_chan_count); + + return 0; +} + +static const struct seq_operations proc_config_ops = { + .start = config_proc_start, + .next = config_proc_next, + .stop = config_proc_stop, + .show = config_proc_show +}; + +static int config_proc_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &proc_config_ops); +} + + +/* + * When writing configuration information, each "record" (i.e. each + * write) is treated as an independent request. See the "parse" + * description for more details. + */ +static ssize_t config_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *pos) +{ + ssize_t retval; + char *inbuf, *sp; + char *line, *ldelim; + + if (count > 32768) + return -EINVAL; + + inbuf = sp = vzalloc(count + 1); + if (!inbuf) + return -ENOMEM; + + if (copy_from_user(inbuf, buffer, count)) { + retval = -EFAULT; + goto done; + } + + inbuf[count] = 0; + + ldelim = "\n"; + + line = strpbrk(sp, ldelim); + while (line) { + *line = 0; + retval = parse_write_config(sp); + if (retval) + goto done; + + sp = line + 1; + line = strpbrk(sp, ldelim); + } + + retval = count; +done: + vfree(inbuf); + return retval; +} + +/* + * ------------------------------------------------------------------------ + * + * The following are the functions to parse input + * + * ------------------------------------------------------------------------ + */ +static inline char *skip_past_ws(const char *str) +{ + while ((*str) && !isspace(*str)) + ++str; + + return skip_spaces(str); +} + +static int parse_id(char **c, char *cID) +{ + int tmp = **c; + + if (isalnum(tmp) || (tmp == '_')) + cID[0] = tmp; + else + return -EINVAL; + + (*c)++; tmp = **c; + + if (isalnum(tmp) || (tmp == '_')) { + cID[1] = tmp; + (*c)++; + } else + cID[1] = 0; + + return 0; +} + +static int parse_add_config(char *buf) +{ + char *c = buf; + int retval; + char cID[2]; + long ID; + + c = skip_past_ws(c); + + retval = parse_id(&c, cID); + if (retval < 0) + return retval; + + ID = CHAR_TO_ID(cID); + + c = skip_past_ws(c); + + return dgrp_add_id(ID); +} + +static int parse_del_config(char *buf) +{ + char *c = buf; + int retval; + struct nd_struct *nd; + char cID[2]; + long ID; + long major; + + c = skip_past_ws(c); + + retval = parse_id(&c, cID); + if (retval < 0) + return retval; + + ID = CHAR_TO_ID(cID); + + c = skip_past_ws(c); + + retval = kstrtol(c, 10, &major); + if (retval) + return retval; + + nd = nd_struct_get(major); + if (!nd) + return -EINVAL; + + if ((nd->nd_major != major) || (nd->nd_ID != ID)) + return -EINVAL; + + return dgrp_remove_nd(nd); +} + +static int parse_chg_config(char *buf) +{ + return -EINVAL; +} + +/* + * The passed character buffer represents a single configuration request. + * If the first character is a "+", it is parsed as a request to add a + * PortServer + * If the first character is a "-", it is parsed as a request to delete a + * PortServer + * If the first character is a "*", it is parsed as a request to change a + * PortServer + * Any other character (including whitespace) causes the record to be + * ignored. + */ +static int parse_write_config(char *buf) +{ + int retval; + + switch (buf[0]) { + case '+': + retval = parse_add_config(buf); + break; + case '-': + retval = parse_del_config(buf); + break; + case '*': + retval = parse_chg_config(buf); + break; + default: + retval = -EINVAL; + } + + return retval; +} + +static int info_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "version: %s\n", DIGI_VERSION); + seq_puts(m, "register_with_sysfs: 1\n"); + seq_printf(m, "rawreadok: 0x%08x\t(%d)\n", + dgrp_rawreadok, dgrp_rawreadok); + seq_printf(m, "pollrate: 0x%08x\t(%d)\n", + dgrp_poll_tick, dgrp_poll_tick); + + return 0; +} + +static int info_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, info_proc_show, NULL); +} + + +static void *nodeinfo_start(struct seq_file *m, loff_t *pos) +{ + return seq_list_start_head(&nd_struct_list, *pos); +} + +static void *nodeinfo_next(struct seq_file *p, void *v, loff_t *pos) +{ + return seq_list_next(v, &nd_struct_list, pos); +} + +static void nodeinfo_stop(struct seq_file *m, void *v) +{ +} + +static int nodeinfo_show(struct seq_file *m, void *v) +{ + struct nd_struct *nd; + char hwver[8]; + char swver[8]; + char tmp_id[4]; + + if (v == &nd_struct_list) { + seq_puts(m, "#-----------------------------------------------------------------------------\n"); + seq_puts(m, "# HW HW SW\n"); + seq_puts(m, "# ID State Version ID Version Description\n"); + return 0; + } + + nd = list_entry(v, struct nd_struct, list); + + ID_TO_CHAR(nd->nd_ID, tmp_id); + + if (nd->nd_state == NS_READY) { + sprintf(hwver, "%d.%d", (nd->nd_hw_ver >> 8) & 0xff, + nd->nd_hw_ver & 0xff); + sprintf(swver, "%d.%d", (nd->nd_sw_ver >> 8) & 0xff, + nd->nd_sw_ver & 0xff); + seq_printf(m, " %-2.2s %-10.10s %-7.7s %-3d %-7.7s %-35.35s\n", + tmp_id, + ND_STATE_STR(nd->nd_state), + hwver, + nd->nd_hw_id, + swver, + nd->nd_ps_desc); + + } else { + seq_printf(m, " %-2.2s %-10.10s\n", + tmp_id, + ND_STATE_STR(nd->nd_state)); + } + + return 0; +} + + +static const struct seq_operations nodeinfo_ops = { + .start = nodeinfo_start, + .next = nodeinfo_next, + .stop = nodeinfo_stop, + .show = nodeinfo_show +}; + +static int nodeinfo_proc_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &nodeinfo_ops); +} + +/** + * dgrp_add_id() -- creates new nd struct and adds it to list + * @id: id of device to add + */ +static int dgrp_add_id(long id) +{ + struct nd_struct *nd; + int ret; + int i; + + nd = kzalloc(sizeof(struct nd_struct), GFP_KERNEL); + if (!nd) + return -ENOMEM; + + nd->nd_major = 0; + nd->nd_ID = id; + + spin_lock_init(&nd->nd_lock); + + init_waitqueue_head(&nd->nd_tx_waitq); + init_waitqueue_head(&nd->nd_mon_wqueue); + init_waitqueue_head(&nd->nd_dpa_wqueue); + for (i = 0; i < SEQ_MAX; i++) + init_waitqueue_head(&nd->nd_seq_wque[i]); + + /* setup the structures to get the major number */ + ret = dgrp_tty_init(nd); + if (ret) + goto error_out; + + nd->nd_major = nd->nd_serial_ttdriver->major; + + ret = nd_struct_add(nd); + if (ret) + goto error_out; + + register_dgrp_device(nd, net_entry_pointer, dgrp_register_net_hook); + register_dgrp_device(nd, mon_entry_pointer, dgrp_register_mon_hook); + register_dgrp_device(nd, dpa_entry_pointer, dgrp_register_dpa_hook); + register_dgrp_device(nd, ports_entry_pointer, + dgrp_register_ports_hook); + + return 0; + +error_out: + kfree(nd); + return ret; + +} + +static int dgrp_remove_nd(struct nd_struct *nd) +{ + int ret; + + /* Check to see if the selected structure is in use */ + if (nd->nd_tty_ref_cnt) + return -EBUSY; + + if (nd->nd_net_de) { + unregister_dgrp_device(nd->nd_net_de); + dgrp_remove_node_class_sysfs_files(nd); + } + + if (nd->nd_mon_de) + unregister_dgrp_device(nd->nd_mon_de); + + if (nd->nd_ports_de) + unregister_dgrp_device(nd->nd_ports_de); + + if (nd->nd_dpa_de) + unregister_dgrp_device(nd->nd_dpa_de); + + dgrp_tty_uninit(nd); + + ret = nd_struct_del(nd); + if (ret) + return ret; + + kfree(nd); + return 0; +} + +static void register_dgrp_device(struct nd_struct *node, + struct proc_dir_entry *root, + void (*register_hook)(struct proc_dir_entry *de)) +{ + char buf[3]; + struct proc_dir_entry *de; + + ID_TO_CHAR(node->nd_ID, buf); + + de = create_proc_entry(buf, 0600 | S_IFREG, root); + if (!de) + return; + + de->data = (void *) node; + + if (register_hook) + register_hook(de); + +} + +static void unregister_dgrp_device(struct proc_dir_entry *de) +{ + if (!de) + return; + + /* Don't unregister proc entries that are still being used.. */ + if ((atomic_read(&de->count)) != 1) { + pr_alert("%s - proc entry %s in use. Not removing.\n", + __func__, de->name); + return; + } + + remove_proc_entry(de->name, de->parent); + de = NULL; +} diff --git a/drivers/staging/dgrp/dgrp_sysfs.c b/drivers/staging/dgrp/dgrp_sysfs.c new file mode 100644 index 00000000000..e5a3c88d016 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_sysfs.c @@ -0,0 +1,555 @@ +/* + * Copyright 2004 Digi International (www.digi.com) + * Scott H Kilau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +#include "dgrp_common.h" + +#include +#include +#include +#include +#include +#include +#include +#include + + +#define PORTSERVER_DIVIDEND 1843200 +#define SERIAL_TYPE_NORMAL 1 +#define SERIAL_TYPE_CALLOUT 2 +#define SERIAL_TYPE_XPRINT 3 + + +static struct class *dgrp_class; +static struct device *dgrp_class_nodes_dev; +static struct device *dgrp_class_global_settings_dev; + + +static ssize_t dgrp_class_version_show(struct class *class, + struct class_attribute *attr, char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%s\n", DIGI_VERSION); +} +static CLASS_ATTR(driver_version, 0400, dgrp_class_version_show, NULL); + + +static ssize_t dgrp_class_register_with_sysfs_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "1\n"); +} +static DEVICE_ATTR(register_with_sysfs, 0400, + dgrp_class_register_with_sysfs_show, NULL); + + +static ssize_t dgrp_class_rawreadok_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_rawreadok); +} +static ssize_t dgrp_class_rawreadok_store(struct device *c, + struct device_attribute *attr, + const char *buf, size_t count) +{ + sscanf(buf, "0x%x\n", &dgrp_rawreadok); + return count; +} +static DEVICE_ATTR(rawreadok, 0600, dgrp_class_rawreadok_show, + dgrp_class_rawreadok_store); + + +static ssize_t dgrp_class_pollrate_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + return snprintf(buf, PAGE_SIZE, "%d\n", dgrp_poll_tick); +} + +static ssize_t dgrp_class_pollrate_store(struct device *c, + struct device_attribute *attr, + const char *buf, size_t count) +{ + sscanf(buf, "0x%x\n", &dgrp_poll_tick); + return count; +} +static DEVICE_ATTR(pollrate, 0600, dgrp_class_pollrate_show, + dgrp_class_pollrate_store); + +static struct attribute *dgrp_sysfs_global_settings_entries[] = { + &dev_attr_pollrate.attr, + &dev_attr_rawreadok.attr, + &dev_attr_register_with_sysfs.attr, + NULL +}; + + +static struct attribute_group dgrp_global_settings_attribute_group = { + .name = NULL, + .attrs = dgrp_sysfs_global_settings_entries, +}; + + + +void dgrp_create_class_sysfs_files(void) +{ + int ret = 0; + int max_majors = 1U << (32 - MINORBITS); + + dgrp_class = class_create(THIS_MODULE, "digi_realport"); + ret = class_create_file(dgrp_class, &class_attr_driver_version); + + dgrp_class_global_settings_dev = device_create(dgrp_class, NULL, + MKDEV(0, max_majors + 1), NULL, "driver_settings"); + + ret = sysfs_create_group(&dgrp_class_global_settings_dev->kobj, + &dgrp_global_settings_attribute_group); + if (ret) { + pr_alert("%s: failed to create sysfs global settings device attributes.\n", + __func__); + sysfs_remove_group(&dgrp_class_global_settings_dev->kobj, + &dgrp_global_settings_attribute_group); + return; + } + + dgrp_class_nodes_dev = device_create(dgrp_class, NULL, + MKDEV(0, max_majors + 2), NULL, "nodes"); + +} + + +void dgrp_remove_class_sysfs_files(void) +{ + struct nd_struct *nd; + int max_majors = 1U << (32 - MINORBITS); + + list_for_each_entry(nd, &nd_struct_list, list) + dgrp_remove_node_class_sysfs_files(nd); + + sysfs_remove_group(&dgrp_class_global_settings_dev->kobj, + &dgrp_global_settings_attribute_group); + + class_remove_file(dgrp_class, &class_attr_driver_version); + + device_destroy(dgrp_class, MKDEV(0, max_majors + 1)); + device_destroy(dgrp_class, MKDEV(0, max_majors + 2)); + class_destroy(dgrp_class); +} + +static ssize_t dgrp_node_state_show(struct device *c, + struct device_attribute *attr, char *buf) +{ + struct nd_struct *nd; + + if (!c) + return 0; + nd = (struct nd_struct *) dev_get_drvdata(c); + if (!nd) + return 0; + + return snprintf(buf, PAGE_SIZE, "%s\n", ND_STATE_STR(nd->nd_state)); +} + +static DEVICE_ATTR(state, 0600, dgrp_node_state_show, NULL); + +static ssize_t dgrp_node_description_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + struct nd_struct *nd; + + if (!c) + return 0; + nd = (struct nd_struct *) dev_get_drvdata(c); + if (!nd) + return 0; + + if (nd->nd_state == NS_READY && nd->nd_ps_desc) + return snprintf(buf, PAGE_SIZE, "%s\n", nd->nd_ps_desc); + return 0; +} +static DEVICE_ATTR(description_info, 0600, dgrp_node_description_show, NULL); + +static ssize_t dgrp_node_hw_version_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + struct nd_struct *nd; + + if (!c) + return 0; + nd = (struct nd_struct *) dev_get_drvdata(c); + if (!nd) + return 0; + + if (nd->nd_state == NS_READY) + return snprintf(buf, PAGE_SIZE, "%d.%d\n", + (nd->nd_hw_ver >> 8) & 0xff, + nd->nd_hw_ver & 0xff); + + return 0; +} +static DEVICE_ATTR(hw_version_info, 0600, dgrp_node_hw_version_show, NULL); + +static ssize_t dgrp_node_hw_id_show(struct device *c, + struct device_attribute *attr, char *buf) +{ + struct nd_struct *nd; + + if (!c) + return 0; + nd = (struct nd_struct *) dev_get_drvdata(c); + if (!nd) + return 0; + + + if (nd->nd_state == NS_READY) + return snprintf(buf, PAGE_SIZE, "%d\n", nd->nd_hw_id); + return 0; +} +static DEVICE_ATTR(hw_id_info, 0600, dgrp_node_hw_id_show, NULL); + +static ssize_t dgrp_node_sw_version_show(struct device *c, + struct device_attribute *attr, + char *buf) +{ + struct nd_struct *nd; + + if (!c) + return 0; + + nd = (struct nd_struct *) dev_get_drvdata(c); + if (!nd) + return 0; + + if (nd->nd_state == NS_READY) + return snprintf(buf, PAGE_SIZE, "%d.%d\n", + (nd->nd_sw_ver >> 8) & 0xff, + nd->nd_sw_ver & 0xff); + + return 0; +} +static DEVICE_ATTR(sw_version_info, 0600, dgrp_node_sw_version_show, NULL); + + +static struct attribute *dgrp_sysfs_node_entries[] = { + &dev_attr_state.attr, + &dev_attr_description_info.attr, + &dev_attr_hw_version_info.attr, + &dev_attr_hw_id_info.attr, + &dev_attr_sw_version_info.attr, + NULL +}; + + +static struct attribute_group dgrp_node_attribute_group = { + .name = NULL, + .attrs = dgrp_sysfs_node_entries, +}; + + +void dgrp_create_node_class_sysfs_files(struct nd_struct *nd) +{ + int ret; + char name[10]; + + if (nd->nd_ID) + ID_TO_CHAR(nd->nd_ID, name); + else + sprintf(name, "node%ld", nd->nd_major); + + nd->nd_class_dev = device_create(dgrp_class, dgrp_class_nodes_dev, + MKDEV(0, nd->nd_major), NULL, name); + + ret = sysfs_create_group(&nd->nd_class_dev->kobj, + &dgrp_node_attribute_group); + + if (ret) { + pr_alert("%s: failed to create sysfs node device attributes.\n", + __func__); + sysfs_remove_group(&nd->nd_class_dev->kobj, + &dgrp_node_attribute_group); + return; + } + + dev_set_drvdata(nd->nd_class_dev, nd); + +} + + +void dgrp_remove_node_class_sysfs_files(struct nd_struct *nd) +{ + if (nd->nd_class_dev) { + sysfs_remove_group(&nd->nd_class_dev->kobj, + &dgrp_node_attribute_group); + + device_destroy(dgrp_class, MKDEV(0, nd->nd_major)); + nd->nd_class_dev = NULL; + } +} + + + +static ssize_t dgrp_tty_state_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + + return snprintf(buf, PAGE_SIZE, "%s\n", + un->un_open_count ? "Open" : "Closed"); +} +static DEVICE_ATTR(state_info, 0600, dgrp_tty_state_show, NULL); + +static ssize_t dgrp_tty_baud_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%d\n", + un->un_open_count ? (PORTSERVER_DIVIDEND / ch->ch_s_brate) : 0); +} +static DEVICE_ATTR(baud_info, 0400, dgrp_tty_baud_show, NULL); + + +static ssize_t dgrp_tty_msignals_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + + if (ch->ch_open_count) { + return snprintf(buf, PAGE_SIZE, "%s %s %s %s %s %s\n", + (ch->ch_s_mlast & DM_RTS) ? "RTS" : "", + (ch->ch_s_mlast & DM_CTS) ? "CTS" : "", + (ch->ch_s_mlast & DM_DTR) ? "DTR" : "", + (ch->ch_s_mlast & DM_DSR) ? "DSR" : "", + (ch->ch_s_mlast & DM_CD) ? "DCD" : "", + (ch->ch_s_mlast & DM_RI) ? "RI" : ""); + } + return 0; +} +static DEVICE_ATTR(msignals_info, 0400, dgrp_tty_msignals_show, NULL); + + +static ssize_t dgrp_tty_iflag_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_iflag); +} +static DEVICE_ATTR(iflag_info, 0600, dgrp_tty_iflag_show, NULL); + + +static ssize_t dgrp_tty_cflag_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_cflag); +} +static DEVICE_ATTR(cflag_info, 0600, dgrp_tty_cflag_show, NULL); + + +static ssize_t dgrp_tty_oflag_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_s_oflag); +} +static DEVICE_ATTR(oflag_info, 0600, dgrp_tty_oflag_show, NULL); + + +static ssize_t dgrp_tty_digi_flag_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%x\n", ch->ch_digi.digi_flags); +} +static DEVICE_ATTR(digi_flag_info, 0600, dgrp_tty_digi_flag_show, NULL); + + +static ssize_t dgrp_tty_rxcount_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_rxcount); +} +static DEVICE_ATTR(rxcount_info, 0600, dgrp_tty_rxcount_show, NULL); + + +static ssize_t dgrp_tty_txcount_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct ch_struct *ch; + struct un_struct *un; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + return snprintf(buf, PAGE_SIZE, "%d\n", ch->ch_txcount); +} +static DEVICE_ATTR(txcount_info, 0600, dgrp_tty_txcount_show, NULL); + + +static ssize_t dgrp_tty_name_show(struct device *d, + struct device_attribute *attr, char *buf) +{ + struct nd_struct *nd; + struct ch_struct *ch; + struct un_struct *un; + char name[10]; + + if (!d) + return 0; + un = (struct un_struct *) dev_get_drvdata(d); + if (!un) + return 0; + ch = un->un_ch; + if (!ch) + return 0; + nd = ch->ch_nd; + if (!nd) + return 0; + + ID_TO_CHAR(nd->nd_ID, name); + + return snprintf(buf, PAGE_SIZE, "%s%s%02d\n", + un->un_type == SERIAL_TYPE_XPRINT ? "pr" : "tty", + name, ch->ch_portnum); +} +static DEVICE_ATTR(custom_name, 0600, dgrp_tty_name_show, NULL); + + +static struct attribute *dgrp_sysfs_tty_entries[] = { + &dev_attr_state_info.attr, + &dev_attr_baud_info.attr, + &dev_attr_msignals_info.attr, + &dev_attr_iflag_info.attr, + &dev_attr_cflag_info.attr, + &dev_attr_oflag_info.attr, + &dev_attr_digi_flag_info.attr, + &dev_attr_rxcount_info.attr, + &dev_attr_txcount_info.attr, + &dev_attr_custom_name.attr, + NULL +}; + + +static struct attribute_group dgrp_tty_attribute_group = { + .name = NULL, + .attrs = dgrp_sysfs_tty_entries, +}; + + +void dgrp_create_tty_sysfs(struct un_struct *un, struct device *c) +{ + int ret; + + ret = sysfs_create_group(&c->kobj, &dgrp_tty_attribute_group); + if (ret) { + pr_alert("%s: failed to create sysfs tty device attributes.\n", + __func__); + sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group); + return; + } + + dev_set_drvdata(c, un); + +} + + +void dgrp_remove_tty_sysfs(struct device *c) +{ + sysfs_remove_group(&c->kobj, &dgrp_tty_attribute_group); +} diff --git a/drivers/staging/dgrp/dgrp_tty.c b/drivers/staging/dgrp/dgrp_tty.c new file mode 100644 index 00000000000..7d7de873870 --- /dev/null +++ b/drivers/staging/dgrp/dgrp_tty.c @@ -0,0 +1,3331 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * Gene Olson + * James Puzzo + * Jeff Randall + * Scott Kilau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/* + * + * Filename: + * + * dgrp_tty.c + * + * Description: + * + * This file implements the tty driver functionality for the + * RealPort driver software. + * + * Author: + * + * James A. Puzzo + * Ann-Marie Westgate + * + */ + +#include +#include +#include +#include + +#include "dgrp_common.h" + +#ifndef _POSIX_VDISABLE +#define _POSIX_VDISABLE ('\0') +#endif + +/* + * forward declarations + */ + +static void drp_param(struct ch_struct *); +static void dgrp_tty_close(struct tty_struct *, struct file *); + +/* ioctl helper functions */ +static int set_modem_info(struct ch_struct *, unsigned int, unsigned int *); +static int get_modem_info(struct ch_struct *, unsigned int *); +static void dgrp_set_custom_speed(struct ch_struct *, int); +static int dgrp_tty_digigetedelay(struct tty_struct *, int *); +static int dgrp_tty_digisetedelay(struct tty_struct *, int *); +static int dgrp_send_break(struct ch_struct *, int); + +static ushort tty_to_ch_flags(struct tty_struct *, char); +static tcflag_t ch_to_tty_flags(unsigned short, char); + +static void dgrp_tty_input_start(struct tty_struct *); +static void dgrp_tty_input_stop(struct tty_struct *); + +static void drp_wmove(struct ch_struct *, int, void*, int); + +static int dgrp_tty_open(struct tty_struct *, struct file *); +static void dgrp_tty_close(struct tty_struct *, struct file *); +static int dgrp_tty_write(struct tty_struct *, const unsigned char *, int); +static int dgrp_tty_write_room(struct tty_struct *); +static void dgrp_tty_flush_buffer(struct tty_struct *); +static int dgrp_tty_chars_in_buffer(struct tty_struct *); +static int dgrp_tty_ioctl(struct tty_struct *, unsigned int, unsigned long); +static void dgrp_tty_set_termios(struct tty_struct *, struct ktermios *); +static void dgrp_tty_stop(struct tty_struct *); +static void dgrp_tty_start(struct tty_struct *); +static void dgrp_tty_throttle(struct tty_struct *); +static void dgrp_tty_unthrottle(struct tty_struct *); +static void dgrp_tty_hangup(struct tty_struct *); +static int dgrp_tty_put_char(struct tty_struct *, unsigned char); +static int dgrp_tty_tiocmget(struct tty_struct *); +static int dgrp_tty_tiocmset(struct tty_struct *, unsigned int, unsigned int); +static int dgrp_tty_send_break(struct tty_struct *, int); +static void dgrp_tty_send_xchar(struct tty_struct *, char); + +/* + * tty defines + */ +#define SERIAL_TYPE_NORMAL 1 +#define SERIAL_TYPE_CALLOUT 2 +#define SERIAL_TYPE_XPRINT 3 + + +/* + * tty globals/statics + */ + + +#define PORTSERVER_DIVIDEND 1843200 + +/* + * Default transparent print information. + */ +static struct digi_struct digi_init = { + .digi_flags = DIGI_COOK, /* Flags */ + .digi_maxcps = 100, /* Max CPS */ + .digi_maxchar = 50, /* Max chars in print queue */ + .digi_bufsize = 100, /* Printer buffer size */ + .digi_onlen = 4, /* size of printer on string */ + .digi_offlen = 4, /* size of printer off string */ + .digi_onstr = "\033[5i", /* ANSI printer on string */ + .digi_offstr = "\033[4i", /* ANSI printer off string */ + .digi_term = "ansi" /* default terminal type */ +}; + +/* + * Define a local default termios struct. All ports will be created + * with this termios initially. + * + * This defines a raw port at 9600 baud, 8 data bits, no parity, + * 1 stop bit. + */ +static struct ktermios DefaultTermios = { + .c_iflag = (ICRNL | IXON), + .c_oflag = (OPOST | ONLCR), + .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL), + .c_lflag = (ISIG | ICANON | ECHO | ECHOE | ECHOK | ECHOCTL + | ECHOKE | IEXTEN), + .c_cc = INIT_C_CC, + .c_line = 0, +}; + +/* Define our tty operations struct */ +static const struct tty_operations dgrp_tty_ops = { + .open = dgrp_tty_open, + .close = dgrp_tty_close, + .write = dgrp_tty_write, + .write_room = dgrp_tty_write_room, + .flush_buffer = dgrp_tty_flush_buffer, + .chars_in_buffer = dgrp_tty_chars_in_buffer, + .flush_chars = NULL, + .ioctl = dgrp_tty_ioctl, + .set_termios = dgrp_tty_set_termios, + .stop = dgrp_tty_stop, + .start = dgrp_tty_start, + .throttle = dgrp_tty_throttle, + .unthrottle = dgrp_tty_unthrottle, + .hangup = dgrp_tty_hangup, + .put_char = dgrp_tty_put_char, + .tiocmget = dgrp_tty_tiocmget, + .tiocmset = dgrp_tty_tiocmset, + .break_ctl = dgrp_tty_send_break, + .send_xchar = dgrp_tty_send_xchar +}; + + +static int calc_baud_rate(struct un_struct *un) +{ + int i; + int brate; + + struct baud_rates { + unsigned int rate; + unsigned int cflag; + }; + + static struct baud_rates baud_rates[] = { + { 921600, B921600 }, + { 460800, B460800 }, + { 230400, B230400 }, + { 115200, B115200 }, + { 57600, B57600 }, + { 38400, B38400 }, + { 19200, B19200 }, + { 9600, B9600 }, + { 4800, B4800 }, + { 2400, B2400 }, + { 1200, B1200 }, + { 600, B600 }, + { 300, B300 }, + { 200, B200 }, + { 150, B150 }, + { 134, B134 }, + { 110, B110 }, + { 75, B75 }, + { 50, B50 }, + { 0, B9600 } + }; + + brate = C_BAUD(un->un_tty); + + for (i = 0; baud_rates[i].rate; i++) { + if (baud_rates[i].cflag == brate) + break; + } + + return baud_rates[i].rate; +} + +static int calc_fastbaud_rate(struct un_struct *un, struct ktermios *uts) +{ + int i; + int brate; + + ulong bauds[2][16] = { + { /* fastbaud*/ + 0, 57600, 76800, 115200, + 131657, 153600, 230400, 460800, + 921600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 }, + { /* fastbaud & CBAUDEX */ + 0, 57600, 115200, 230400, + 460800, 150, 200, 921600, + 600, 1200, 1800, 2400, + 4800, 9600, 19200, 38400 } + }; + + brate = C_BAUD(un->un_tty) & 0xff; + + i = (uts->c_cflag & CBAUDEX) ? 1 : 0; + + + if ((i >= 0) && (i < 2) && (brate >= 0) && (brate < 16)) + brate = bauds[i][brate]; + else + brate = 0; + + return brate; +} + +/** + * drp_param() -- send parameter values to be sent to the node + * @ch: channel structure of port to modify + * + * Interprets the tty and modem changes made by an application + * program (by examining the termios structures) and sets up + * parameter values to be sent to the node. + */ +static void drp_param(struct ch_struct *ch) +{ + struct nd_struct *nd; + struct un_struct *un; + int brate; + int mflow; + int xflag; + int iflag; + struct ktermios *tts, *pts, *uts; + + nd = ch->ch_nd; + + /* + * If the terminal device is open, use it to set up all tty + * modes and functions. Otherwise use the printer device. + */ + + if (ch->ch_tun.un_open_count) { + + un = &ch->ch_tun; + tts = &ch->ch_tun.un_tty->termios; + + /* + * If both devices are open, copy critical line + * parameters from the tty device to the printer, + * so that if the tty is closed, the printer will + * continue without disruption. + */ + + if (ch->ch_pun.un_open_count) { + + pts = &ch->ch_pun.un_tty->termios; + + pts->c_cflag ^= + (pts->c_cflag ^ tts->c_cflag) & + (CBAUD | CSIZE | CSTOPB | CREAD | PARENB | + PARODD | HUPCL | CLOCAL); + + pts->c_iflag ^= + (pts->c_iflag ^ tts->c_iflag) & + (IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK | + ISTRIP | IXON | IXANY | IXOFF); + + pts->c_cc[VSTART] = tts->c_cc[VSTART]; + pts->c_cc[VSTOP] = tts->c_cc[VSTOP]; + } + } else if (ch->ch_pun.un_open_count == 0) { + pr_warn("%s - ch_pun.un_open_count shouldn't be 0\n", + __func__); + return; + } else { + un = &ch->ch_pun; + } + + uts = &un->un_tty->termios; + + /* + * Determine if FAST writes can be performed. + */ + + if ((ch->ch_digi.digi_flags & DIGI_COOK) != 0 && + (ch->ch_tun.un_open_count != 0) && + !((un->un_tty)->ldisc->ops->flags & LDISC_FLAG_DEFINED) && + !(L_XCASE(un->un_tty))) { + ch->ch_flag |= CH_FAST_WRITE; + } else { + ch->ch_flag &= ~CH_FAST_WRITE; + } + + /* + * If FAST writes can be performed, and OPOST is on in the + * terminal device, do OPOST handling in the server. + */ + + if ((ch->ch_flag & CH_FAST_WRITE) && + O_OPOST(un->un_tty) != 0) { + int oflag = tty_to_ch_flags(un->un_tty, 'o'); + + /* add to ch_ocook any processing flags set in the termio */ + ch->ch_ocook |= oflag & (OF_OLCUC | + OF_ONLCR | + OF_OCRNL | + OF_ONLRET | + OF_TABDLY); + + /* + * the hpux driver clears any flags set in ch_ocook + * from the termios oflag. It is STILL reported though + * by a TCGETA + */ + + oflag = ch_to_tty_flags(ch->ch_ocook, 'o'); + uts->c_oflag &= ~oflag; + + } else { + /* clear the ch->ch_ocook flag */ + int oflag = ch_to_tty_flags(ch->ch_ocook, 'o'); + uts->c_oflag |= oflag; + ch->ch_ocook = 0; + } + + ch->ch_oflag = ch->ch_ocook; + + + ch->ch_flag &= ~CH_FAST_READ; + + /* + * Generate channel flags + */ + + if (C_BAUD(un->un_tty) == B0) { + if (!(ch->ch_flag & CH_BAUD0)) { + /* TODO : the HPUX driver flushes line */ + /* TODO : discipline, I assume I don't have to */ + + ch->ch_tout = ch->ch_tin; + ch->ch_rout = ch->ch_rin; + + ch->ch_break_time = 0; + + ch->ch_send |= RR_TX_FLUSH | RR_RX_FLUSH; + + ch->ch_mout &= ~(DM_DTR | DM_RTS); + + ch->ch_flag |= CH_BAUD0; + } + } else if (ch->ch_custom_speed) { + ch->ch_brate = PORTSERVER_DIVIDEND / ch->ch_custom_speed ; + + if (ch->ch_flag & CH_BAUD0) { + ch->ch_mout |= DM_DTR | DM_RTS; + + ch->ch_flag &= ~CH_BAUD0; + } + } else { + /* + * Baud rate mapping. + * + * If FASTBAUD isn't on, we can scan the new baud rate list + * as required. + * + * However, if FASTBAUD is on, we must go to the old + * baud rate mapping that existed many many moons ago, + * for compatibility reasons. + */ + + if (!(ch->ch_digi.digi_flags & DIGI_FAST)) + brate = calc_baud_rate(un); + else + brate = calc_fastbaud_rate(un, uts); + + if (brate == 0) + brate = 9600; + + ch->ch_brate = PORTSERVER_DIVIDEND / brate; + + if (ch->ch_flag & CH_BAUD0) { + ch->ch_mout |= DM_DTR | DM_RTS; + + ch->ch_flag &= ~CH_BAUD0; + } + } + + /* + * Generate channel cflags from the termio. + */ + + ch->ch_cflag = tty_to_ch_flags(un->un_tty, 'c'); + + /* + * Generate channel iflags from the termio. + */ + + iflag = (int) tty_to_ch_flags(un->un_tty, 'i'); + + if (START_CHAR(un->un_tty) == _POSIX_VDISABLE || + STOP_CHAR(un->un_tty) == _POSIX_VDISABLE) { + iflag &= ~(IF_IXON | IF_IXANY | IF_IXOFF); + } + + ch->ch_iflag = iflag; + + /* + * Generate flow control characters + */ + + /* + * From the POSIX.1 spec (7.1.2.6): "If {_POSIX_VDISABLE} + * is defined for the terminal device file, and the value + * of one of the changable special control characters (see + * 7.1.1.9) is {_POSIX_VDISABLE}, that function shall be + * disabled, that is, no input data shall be recognized as + * the disabled special character." + * + * OK, so we don't ever assign S/DXB XON or XOFF to _POSIX_VDISABLE. + */ + + if (uts->c_cc[VSTART] != _POSIX_VDISABLE) + ch->ch_xon = uts->c_cc[VSTART]; + if (uts->c_cc[VSTOP] != _POSIX_VDISABLE) + ch->ch_xoff = uts->c_cc[VSTOP]; + + ch->ch_lnext = (uts->c_cc[VLNEXT] == _POSIX_VDISABLE ? 0 : + uts->c_cc[VLNEXT]); + + /* + * Also, if either c_cc[START] or c_cc[STOP] is set to + * _POSIX_VDISABLE, we can't really do software flow + * control--in either direction--so we turn it off as + * far as S/DXB is concerned. In essence, if you disable + * one, you disable the other too. + */ + if ((uts->c_cc[VSTART] == _POSIX_VDISABLE) || + (uts->c_cc[VSTOP] == _POSIX_VDISABLE)) + ch->ch_iflag &= ~(IF_IXOFF | IF_IXON); + + /* + * Update xflags. + */ + + xflag = 0; + + if (ch->ch_digi.digi_flags & DIGI_AIXON) + xflag = XF_XIXON; + + if ((ch->ch_xxon == _POSIX_VDISABLE) || + (ch->ch_xxoff == _POSIX_VDISABLE)) + xflag &= ~XF_XIXON; + + ch->ch_xflag = xflag; + + + /* + * Figure effective DCD value. + */ + + if (C_CLOCAL(un->un_tty)) + ch->ch_flag |= CH_CLOCAL; + else + ch->ch_flag &= ~CH_CLOCAL; + + /* + * Check modem signals + */ + + dgrp_carrier(ch); + + /* + * Get hardware handshake value. + */ + + mflow = 0; + + if (C_CRTSCTS(un->un_tty)) + mflow |= (DM_RTS | DM_CTS); + + if (ch->ch_digi.digi_flags & RTSPACE) + mflow |= DM_RTS; + + if (ch->ch_digi.digi_flags & DTRPACE) + mflow |= DM_DTR; + + if (ch->ch_digi.digi_flags & CTSPACE) + mflow |= DM_CTS; + + if (ch->ch_digi.digi_flags & DSRPACE) + mflow |= DM_DSR; + + if (ch->ch_digi.digi_flags & DCDPACE) + mflow |= DM_CD; + + if (ch->ch_digi.digi_flags & DIGI_RTS_TOGGLE) + mflow |= DM_RTS_TOGGLE; + + ch->ch_mflow = mflow; + + /* + * Send the changes to the server. + */ + + ch->ch_flag |= CH_PARAM; + (ch->ch_nd)->nd_tx_work = 1; + + if (waitqueue_active(&ch->ch_flag_wait)) + wake_up_interruptible(&ch->ch_flag_wait); +} + +/* + * This function is just used as a callback for timeouts + * waiting on the ch_sleep flag. + */ +static void wake_up_drp_sleep_timer(unsigned long ptr) +{ + struct ch_struct *ch = (struct ch_struct *) ptr; + if (ch) + wake_up(&ch->ch_sleep); +} + + +/* + * Set up our own sleep that can't be cancelled + * until our timeout occurs. + */ +static void drp_my_sleep(struct ch_struct *ch) +{ + struct timer_list drp_wakeup_timer; + DECLARE_WAITQUEUE(wait, current); + + /* + * First make sure we're ready to receive the wakeup. + */ + + add_wait_queue(&ch->ch_sleep, &wait); + current->state = TASK_UNINTERRUPTIBLE; + + /* + * Since we are uninterruptible, set a timer to + * unset the uninterruptable state in 1 second. + */ + + init_timer(&drp_wakeup_timer); + drp_wakeup_timer.function = wake_up_drp_sleep_timer; + drp_wakeup_timer.data = (unsigned long) ch; + drp_wakeup_timer.expires = jiffies + (1 * HZ); + add_timer(&drp_wakeup_timer); + + schedule(); + + del_timer(&drp_wakeup_timer); + + remove_wait_queue(&ch->ch_sleep, &wait); +} + +/* + * dgrp_tty_open() + * + * returns: + * -EBUSY - this is a callout device and the normal device is active + * - there is an error in opening the tty + * -ENODEV - the channel does not exist + * -EAGAIN - we are in the middle of hanging up or closing + * - IMMEDIATE_OPEN fails + * -ENXIO or -EAGAIN + * - if the port is outside physical range + * -EINTR - the open is interrupted + * + */ +static int dgrp_tty_open(struct tty_struct *tty, struct file *file) +{ + int retval = 0; + struct nd_struct *nd; + struct ch_struct *ch; + struct un_struct *un; + int port; + int delay_error; + int otype; + int unf; + int wait_carrier; + int category; + int counts_were_incremented = 0; + ulong lock_flags; + DECLARE_WAITQUEUE(wait, current); + + /* + * Do some initial checks to see if the node and port exist + */ + + nd = nd_struct_get(MAJOR(tty_devnum(tty))); + port = PORT_NUM(MINOR(tty_devnum(tty))); + category = OPEN_CATEGORY(MINOR(tty_devnum(tty))); + + if (!nd) + return -ENODEV; + + if (port >= CHAN_MAX) + return -ENODEV; + + /* + * The channel exists. + */ + + ch = nd->nd_chan + port; + + un = IS_PRINT(MINOR(tty_devnum(tty))) ? &ch->ch_pun : &ch->ch_tun; + un->un_tty = tty; + tty->driver_data = un; + + /* + * If we are in the middle of hanging up, + * then return an error + */ + if (tty_hung_up_p(file)) { + retval = ((un->un_flag & UN_HUP_NOTIFY) ? + -EAGAIN : -ERESTARTSYS); + goto done; + } + + /* + * If the port is in the middle of closing, then block + * until it is done, then try again. + */ + retval = wait_event_interruptible(un->un_close_wait, + ((un->un_flag & UN_CLOSING) == 0)); + + if (retval) + goto done; + + /* + * If the port is in the middle of a reopen after a network disconnect, + * wait until it is done, then try again. + */ + retval = wait_event_interruptible(ch->ch_flag_wait, + ((ch->ch_flag & CH_PORT_GONE) == 0)); + + if (retval) + goto done; + + /* + * If this is a callout device, then just make sure the normal + * device isn't being used. + */ + + if (tty->driver->subtype == SERIAL_TYPE_CALLOUT) { + if (un->un_flag & UN_NORMAL_ACTIVE) { + retval = -EBUSY; + goto done; + } else { + un->un_flag |= UN_CALLOUT_ACTIVE; + } + } + + /* + * Loop waiting until the open can be successfully completed. + */ + + spin_lock_irqsave(&nd->nd_lock, lock_flags); + + nd->nd_tx_work = 1; + + for (;;) { + wait_carrier = 0; + + /* + * Determine the open type from the flags provided. + */ + + /* + * If the port is not enabled, then exit + */ + if (test_bit(TTY_IO_ERROR, &tty->flags)) { + /* there was an error in opening the tty */ + if (un->un_flag & UN_CALLOUT_ACTIVE) + retval = -EBUSY; + else + un->un_flag |= UN_NORMAL_ACTIVE; + goto unlock; + } + + if (file->f_flags & O_NONBLOCK) { + + /* + * if the O_NONBLOCK is set, errors on read and write + * must return -EAGAIN immediately and NOT sleep + * on the waitqs. + */ + otype = OTYPE_IMMEDIATE; + delay_error = -EAGAIN; + + } else if (!OPEN_WAIT_AVAIL(category) || + (file->f_flags & O_NDELAY) != 0) { + otype = OTYPE_IMMEDIATE; + delay_error = -EBUSY; + + } else if (!OPEN_WAIT_CARRIER(category) || + ((ch->ch_digi.digi_flags & DIGI_FORCEDCD) != 0) || + C_CLOCAL(tty)) { + otype = OTYPE_PERSISTENT; + delay_error = 0; + + } else { + otype = OTYPE_INCOMING; + delay_error = 0; + } + + /* + * Handle port currently outside physical port range. + */ + + if (port >= nd->nd_chan_count) { + if (otype == OTYPE_IMMEDIATE) { + retval = (nd->nd_state == NS_READY) ? + -ENXIO : -EAGAIN; + goto unlock; + } + } + + /* + * Handle port not currently open. + */ + + else if (ch->ch_open_count == 0) { + /* + * Return an error when an Incoming Open + * response indicates the port is busy. + */ + + if (ch->ch_open_error != 0 && otype == ch->ch_otype) { + retval = (ch->ch_open_error <= 2) ? + delay_error : -ENXIO ; + goto unlock; + } + + /* + * Fail any new Immediate open if we do not have + * a normal connection to the server. + */ + + if (nd->nd_state != NS_READY && + otype == OTYPE_IMMEDIATE) { + retval = -EAGAIN; + goto unlock; + } + + /* + * If a Realport open of the correct type has + * succeeded, complete the open. + */ + + if (ch->ch_state == CS_READY && ch->ch_otype == otype) + break; + } + + /* + * Handle port already open and active as a device + * of same category. + */ + + else if ((ch->ch_category == category) || + IS_PRINT(MINOR(tty_devnum(tty)))) { + /* + * Fail if opening the device now would + * violate exclusive use. + */ + unf = ch->ch_tun.un_flag | ch->ch_pun.un_flag; + + if ((file->f_flags & O_EXCL) || (unf & UN_EXCL)) { + retval = -EBUSY; + goto unlock; + } + + /* + * If the open device is in the hangup state, all + * system calls fail except close(). + */ + + /* TODO : check on hangup_p calls */ + + if (ch->ch_flag & CH_HANGUP) { + retval = -ENXIO; + goto unlock; + } + + /* + * If the port is ready, and carrier is ignored + * or present, then complete the open. + */ + + if (ch->ch_state == CS_READY && + (otype != OTYPE_INCOMING || + ch->ch_flag & CH_VIRT_CD)) + break; + + wait_carrier = 1; + } + + /* + * Handle port active with a different category device. + */ + + else { + if (otype == OTYPE_IMMEDIATE) { + retval = delay_error; + goto unlock; + } + } + + /* + * Wait until conditions change, then take another + * try at the open. + */ + + ch->ch_wait_count[otype]++; + + if (wait_carrier) + ch->ch_wait_carrier++; + + /* + * Prepare the task to accept the wakeup, then + * release our locks and release control. + */ + + add_wait_queue(&ch->ch_flag_wait, &wait); + current->state = TASK_INTERRUPTIBLE; + + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + + /* + * Give up control, we'll come back if we're + * interrupted or are woken up. + */ + schedule(); + remove_wait_queue(&ch->ch_flag_wait, &wait); + + spin_lock_irqsave(&nd->nd_lock, lock_flags); + + current->state = TASK_RUNNING; + + ch->ch_wait_count[otype]--; + + if (wait_carrier) + ch->ch_wait_carrier--; + + nd->nd_tx_work = 1; + + if (signal_pending(current)) { + retval = -EINTR; + goto unlock; + } + } /* end for(;;) */ + + /* + * The open has succeeded. No turning back. + */ + counts_were_incremented = 1; + un->un_open_count++; + ch->ch_open_count++; + + /* + * Initialize the channel, if it's not already open. + */ + + if (ch->ch_open_count == 1) { + ch->ch_flag = 0; + ch->ch_inwait = 0; + ch->ch_category = category; + ch->ch_pscan_state = 0; + + /* TODO : find out what PS-1 bug Gene was referring to */ + /* TODO : in the following comment. */ + + ch->ch_send = RR_TX_START | RR_RX_START; /* PS-1 bug */ + + if (C_CLOCAL(tty) || + ch->ch_s_mlast & DM_CD || + ch->ch_digi.digi_flags & DIGI_FORCEDCD) + ch->ch_flag |= CH_VIRT_CD; + else if (OPEN_FORCES_CARRIER(category)) + ch->ch_flag |= CH_VIRT_CD; + + } + + /* + * Initialize the unit, if it is not already open. + */ + + if (un->un_open_count == 1) { + /* + * Since all terminal options are always sticky in Linux, + * we don't need the UN_STICKY flag to be handled specially. + */ + /* clears all the digi flags, leaves serial flags */ + un->un_flag &= ~UN_DIGI_MASK; + + if (file->f_flags & O_EXCL) + un->un_flag |= UN_EXCL; + + /* TODO : include "session" and "pgrp" */ + + /* + * In Linux, all terminal parameters are intended to be sticky. + * as a result, we "remove" the code which once reset the ports + * to sane values. + */ + + drp_param(ch); + + } + + un->un_flag |= UN_INITIALIZED; + + retval = 0; + +unlock: + + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + +done: + /* + * Linux does a close for every open, even failed ones! + */ + if (!counts_were_incremented) { + un->un_open_count++; + ch->ch_open_count++; + } + + if (retval) + dev_err(tty->dev, "tty open bad return (%i)\n", retval); + + return retval; +} + + + + +/* + * dgrp_tty_close() -- close function for tty_operations + */ +static void dgrp_tty_close(struct tty_struct *tty, struct file *file) +{ + struct ch_struct *ch; + struct un_struct *un; + struct nd_struct *nd; + int tpos; + int port; + int err = 0; + int s = 0; + ulong waketime; + ulong lock_flags; + int sent_printer_offstr = 0; + + port = PORT_NUM(MINOR(tty_devnum(tty))); + + un = tty->driver_data; + + if (!un) + return; + + ch = un->un_ch; + + if (!ch) + return; + + nd = ch->ch_nd; + + if (!nd) + return; + + spin_lock_irqsave(&nd->nd_lock, lock_flags); + + + /* Used to be on channel basis, now we check on a unit basis. */ + if (un->un_open_count != 1) + goto unlock; + + /* + * OK, its the last close on the unit + */ + un->un_flag |= UN_CLOSING; + + /* + * Notify the discipline to only process XON/XOFF characters. + */ + tty->closing = 1; + + /* + * Wait for output to drain only if this is + * the last close against the channel + */ + + if (ch->ch_open_count == 1) { + /* + * If its the print device, we need to ensure at all costs that + * the offstr will fit. If it won't, flush our tbuf. + */ + if (IS_PRINT(MINOR(tty_devnum(tty))) && + (((ch->ch_tout - ch->ch_tin - 1) & TBUF_MASK) < + ch->ch_digi.digi_offlen)) + ch->ch_tin = ch->ch_tout; + + /* + * Turn off the printer. Don't bother checking to see if its + * IS_PRINT... Since this is the last close the flag is going + * to be cleared, so we MUST make sure the offstr gets inserted + * into tbuf. + */ + + if ((ch->ch_flag & CH_PRON) != 0) { + drp_wmove(ch, 0, ch->ch_digi.digi_offstr, + ch->ch_digi.digi_offlen); + ch->ch_flag &= ~CH_PRON; + sent_printer_offstr = 1; + } + } + + /* + * Wait until either the output queue has drained, or we see + * absolutely no progress for 15 seconds. + */ + + tpos = ch->ch_s_tpos; + + waketime = jiffies + 15 * HZ; + + for (;;) { + + /* + * Make sure the port still exists. + */ + + if (port >= nd->nd_chan_count) { + err = 1; + break; + } + + if (signal_pending(current)) { + err = 1; + break; + } + + /* + * If the port is idle (not opened on the server), we have + * no way of draining/flushing/closing the port on that server. + * So break out of loop. + */ + if (ch->ch_state == CS_IDLE) + break; + + nd->nd_tx_work = 1; + + /* + * Exit if the queues for this unit are empty, + * and either the other unit is still open or all + * data has drained. + */ + + if ((un->un_tty)->ops->chars_in_buffer ? + ((un->un_tty)->ops->chars_in_buffer)(un->un_tty) == 0 : 1) { + + /* + * We don't need to wait for a buffer to drain + * if the other unit is open. + */ + + if (ch->ch_open_count != un->un_open_count) + break; + + /* + * The wait is complete when all queues are + * drained, and any break in progress is complete. + */ + + if (ch->ch_tin == ch->ch_tout && + ch->ch_s_tin == ch->ch_s_tpos && + (ch->ch_send & RR_TX_BREAK) == 0) { + break; + } + } + + /* + * Flush TX data and exit the wait if NDELAY is set, + * or this is not a DIGI printer, and the close timeout + * expires. + */ + + if ((file->f_flags & (O_NDELAY | O_NONBLOCK)) || + ((long)(jiffies - waketime) >= 0 && + (ch->ch_digi.digi_flags & DIGI_PRINTER) == 0)) { + + /* + * If we sent the printer off string, we cannot + * flush our internal buffers, or we might lose + * the offstr. + */ + if (!sent_printer_offstr) + dgrp_tty_flush_buffer(tty); + + tty_ldisc_flush(tty); + break; + } + + /* + * Otherwise take a short nap. + */ + + ch->ch_flag |= CH_DRAIN; + + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + + schedule_timeout_interruptible(1); + s = signal_pending(current); + + spin_lock_irqsave(&nd->nd_lock, lock_flags); + + if (s) { + /* + * If we had sent the printer off string, we now have + * some problems. + * + * The system won't let us sleep since we got an error + * back from sleep, presumably because the user did + * a ctrl-c... + * But we need to ensure that the offstr gets sent! + * Thus, we have to do something else besides sleeping. + * The plan: + * 1) Make this task uninterruptable. + * 2) Set up a timer to go off in 1 sec. + * 3) Act as tho we just got out of the sleep above. + * + * Thankfully, in the real world, this just + * never happens. + */ + + if (sent_printer_offstr) { + spin_unlock_irqrestore(&nd->nd_lock, + lock_flags); + drp_my_sleep(ch); + spin_lock_irqsave(&nd->nd_lock, lock_flags); + } else { + err = 1; + break; + } + } + + /* + * Restart the wait if any progress is seen. + */ + + if (ch->ch_s_tpos != tpos) { + tpos = ch->ch_s_tpos; + + /* TODO: this gives us timeout problems with nist ?? */ + waketime = jiffies + 15 * HZ; + } + } + + /* + * Close the line discipline + */ + + /* this is done in tty_io.c */ + /* if ((un->un_tty)->ldisc.close) + * ((un->un_tty)->ldisc.close)(un->un_tty); + */ + + /* don't do this here */ + /* un->un_flag = 0; */ + + /* + * Flush the receive buffer on terminal unit close only. + */ + + if (!IS_PRINT(MINOR(tty_devnum(tty)))) + ch->ch_rout = ch->ch_rin; + + + /* + * Don't permit the close to happen until we get any pending + * sync request responses. + * There could be other ports depending upon the response as well. + * + * Also, don't permit the close to happen until any parameter + * changes have been sent out from the state machine as well. + * This is required because of a ditty -a race with -HUPCL + * We MUST make sure all channel parameters have been sent to the + * Portserver before sending a close. + */ + + if ((err != 1) && (ch->ch_state != CS_IDLE)) { + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + s = wait_event_interruptible(ch->ch_flag_wait, + ((ch->ch_flag & (CH_WAITING_SYNC | CH_PARAM)) == 0)); + spin_lock_irqsave(&nd->nd_lock, lock_flags); + } + + /* + * Cleanup the channel if last unit open. + */ + + if (ch->ch_open_count == 1) { + ch->ch_flag = 0; + ch->ch_category = 0; + ch->ch_send = 0; + ch->ch_expect = 0; + ch->ch_tout = ch->ch_tin; + /* (un->un_tty)->device = 0; */ + + if (ch->ch_state == CS_READY) + ch->ch_state = CS_SEND_CLOSE; + } + + /* + * Send the changes to the server + */ + if (ch->ch_state != CS_IDLE) { + ch->ch_flag |= CH_PARAM; + wake_up_interruptible(&ch->ch_flag_wait); + } + + nd->nd_tx_work = 1; + nd->nd_tx_ready = 1; + +unlock: + tty->closing = 0; + + if (ch->ch_open_count <= 0) + dev_info(tty->dev, + "%s - unexpected value for ch->ch_open_count: %i\n", + __func__, ch->ch_open_count); + else + ch->ch_open_count--; + + if (un->un_open_count <= 0) + dev_info(tty->dev, + "%s - unexpected value for un->un_open_count: %i\n", + __func__, un->un_open_count); + else + un->un_open_count--; + + un->un_flag &= ~(UN_NORMAL_ACTIVE | UN_CALLOUT_ACTIVE | UN_CLOSING); + if (waitqueue_active(&un->un_close_wait)) + wake_up_interruptible(&un->un_close_wait); + + spin_unlock_irqrestore(&nd->nd_lock, lock_flags); + + return; + +} + +static void drp_wmove(struct ch_struct *ch, int from_user, void *buf, int count) +{ + int n; + int ret = 0; + + ch->ch_nd->nd_tx_work = 1; + + n = TBUF_MAX - ch->ch_tin; + + if (count >= n) { + if (from_user) + ret = copy_from_user(ch->ch_tbuf + ch->ch_tin, + (void __user *) buf, n); + else + memcpy(ch->ch_tbuf + ch->ch_tin, buf, n); + + buf = (char *) buf + n; + count -= n; + ch->ch_tin = 0; + } + + if (from_user) + ret = copy_from_user(ch->ch_tbuf + ch->ch_tin, + (void __user *) buf, count); + else + memcpy(ch->ch_tbuf + ch->ch_tin, buf, count); + + ch->ch_tin += count; +} + + +static int dgrp_calculate_txprint_bounds(struct ch_struct *ch, int space, + int *un_flag) +{ + clock_t tt; + clock_t mt; + unsigned short tmax = 0; + + /* + * If the terminal device is busy, reschedule when + * the terminal device becomes idle. + */ + + if (ch->ch_tun.un_open_count != 0 && + ch->ch_tun.un_tty->ops->chars_in_buffer && + ((ch->ch_tun.un_tty->ops->chars_in_buffer)(ch->ch_tun.un_tty) != 0)) { + *un_flag = UN_PWAIT; + return 0; + } + + /* + * Assure that whenever there is printer data in the output + * buffer, there always remains enough space after it to + * turn the printer off. + */ + space -= ch->ch_digi.digi_offlen; + + if (space <= 0) { + *un_flag = UN_EMPTY; + return 0; + } + + /* + * We measure printer CPS speed by incrementing + * ch_cpstime by (HZ / digi_maxcps) for every + * character we output, restricting output so + * that ch_cpstime never exceeds lbolt. + * + * However if output has not been done for some + * time, lbolt will grow to very much larger than + * ch_cpstime, which would allow essentially + * unlimited amounts of output until ch_cpstime + * finally caught up. To avoid this, we adjust + * cps_time when necessary so the difference + * between lbolt and ch_cpstime never results + * in sending more than digi_bufsize characters. + * + * This nicely models a printer with an internal + * buffer of digi_bufsize characters. + * + * Get the time between lbolt and ch->ch_cpstime; + */ + + tt = jiffies - ch->ch_cpstime; + + /* + * Compute the time required to send digi_bufsize + * characters. + */ + + mt = HZ * ch->ch_digi.digi_bufsize / ch->ch_digi.digi_maxcps; + + /* + * Compute the number of characters that can be sent + * without violating the time constraint. If the + * direct calculation of this number is bigger than + * digi_bufsize, limit the number to digi_bufsize, + * and adjust cpstime to match. + */ + + if ((clock_t)(tt + HZ) > (clock_t)(mt + HZ)) { + tmax = ch->ch_digi.digi_bufsize; + ch->ch_cpstime = jiffies - mt; + } else { + tmax = ch->ch_digi.digi_maxcps * tt / HZ; + } + + /* + * If the time constraint now binds, limit the transmit + * count accordingly, and tentatively arrange to be + * rescheduled based on time. + */ + + if (tmax < space) { + *un_flag = UN_TIME; + space = tmax; + } + + /* + * Compute the total number of characters we can + * output before the total number of characters known + * to be in the output queue exceeds digi_maxchar. + */ + + tmax = (ch->ch_digi.digi_maxchar - + ((ch->ch_tin - ch->ch_tout) & TBUF_MASK) - + ((ch->ch_s_tin - ch->ch_s_tpos) & 0xffff)); + + + /* + * If the digi_maxchar constraint now holds, limit + * the transmit count accordingly, and arrange to + * be rescheduled when the queue becomes empty. + */ + + if (space > tmax) { + *un_flag = UN_EMPTY; + space = tmax; + } + + if (space <= 0) + *un_flag |= UN_EMPTY; + + return space; +} + + +static int dgrp_tty_write(struct tty_struct *tty, + const unsigned char *buf, + int count) +{ + struct nd_struct *nd; + struct un_struct *un; + struct ch_struct *ch; + int space; + int n; + int t; + int sendcount; + int un_flag; + ulong lock_flags; + + if (tty == NULL) + return 0; + + un = tty->driver_data; + if (!un) + return 0; + + ch = un->un_ch; + if (!ch) + return 0; + + nd = ch->ch_nd; + if (!nd) + return 0; + + /* + * Ignore the request if the channel is not ready. + */ + if (ch->ch_state != CS_READY) + return 0; + + spin_lock_irqsave(&dgrp_poll_data.poll_lock, lock_flags); + + /* + * Ignore the request if output is blocked. + */ + if ((un->un_flag & (UN_EMPTY | UN_LOW | UN_TIME | UN_PWAIT)) != 0) { + count = 0; + goto out; + } + + /* + * Also ignore the request if DPA has this port open, + * and is flow controlled on reading more data. + */ + if (nd->nd_dpa_debug && nd->nd_dpa_flag & DPA_WAIT_SPACE && + nd->nd_dpa_port == MINOR(tty_devnum(ch->ch_tun.un_tty))) { + count = 0; + goto out; + } + + /* + * Limit amount we will write to the amount of space + * available in the channel buffer. + */ + sendcount = 0; + + space = (ch->ch_tout - ch->ch_tin - 1) & TBUF_MASK; + + /* + * Handle the printer device. + */ + + un_flag = UN_LOW; + + if (IS_PRINT(MINOR(tty_devnum(tty)))) { + clock_t tt; + clock_t mt; + unsigned short tmax = 0; + + /* + * If the terminal device is busy, reschedule when + * the terminal device becomes idle. + */ + + if (ch->ch_tun.un_open_count != 0 && + ((ch->ch_tun.un_tty->ops->chars_in_buffer)(ch->ch_tun.un_tty) != 0)) { + un->un_flag |= UN_PWAIT; + count = 0; + goto out; + } + + /* + * Assure that whenever there is printer data in the output + * buffer, there always remains enough space after it to + * turn the printer off. + */ + space -= ch->ch_digi.digi_offlen; + + /* + * Output the printer on string. + */ + + if ((ch->ch_flag & CH_PRON) == 0) { + space -= ch->ch_digi.digi_onlen; + + if (space < 0) { + un->un_flag |= UN_EMPTY; + (ch->ch_nd)->nd_tx_work = 1; + count = 0; + goto out; + } + + drp_wmove(ch, 0, ch->ch_digi.digi_onstr, + ch->ch_digi.digi_onlen); + + ch->ch_flag |= CH_PRON; + } + + /* + * We measure printer CPS speed by incrementing + * ch_cpstime by (HZ / digi_maxcps) for every + * character we output, restricting output so + * that ch_cpstime never exceeds lbolt. + * + * However if output has not been done for some + * time, lbolt will grow to very much larger than + * ch_cpstime, which would allow essentially + * unlimited amounts of output until ch_cpstime + * finally caught up. To avoid this, we adjust + * cps_time when necessary so the difference + * between lbolt and ch_cpstime never results + * in sending more than digi_bufsize characters. + * + * This nicely models a printer with an internal + * buffer of digi_bufsize characters. + * + * Get the time between lbolt and ch->ch_cpstime; + */ + + tt = jiffies - ch->ch_cpstime; + + /* + * Compute the time required to send digi_bufsize + * characters. + */ + + mt = HZ * ch->ch_digi.digi_bufsize / ch->ch_digi.digi_maxcps; + + /* + * Compute the number of characters that can be sent + * without violating the time constraint. If the + * direct calculation of this number is bigger than + * digi_bufsize, limit the number to digi_bufsize, + * and adjust cpstime to match. + */ + + if ((clock_t)(tt + HZ) > (clock_t)(mt + HZ)) { + tmax = ch->ch_digi.digi_bufsize; + ch->ch_cpstime = jiffies - mt; + } else { + tmax = ch->ch_digi.digi_maxcps * tt / HZ; + } + + /* + * If the time constraint now binds, limit the transmit + * count accordingly, and tentatively arrange to be + * rescheduled based on time. + */ + + if (tmax < space) { + space = tmax; + un_flag = UN_TIME; + } + + /* + * Compute the total number of characters we can + * output before the total number of characters known + * to be in the output queue exceeds digi_maxchar. + */ + + tmax = (ch->ch_digi.digi_maxchar - + ((ch->ch_tin - ch->ch_tout) & TBUF_MASK) - + ((ch->ch_s_tin - ch->ch_s_tpos) & 0xffff)); + + + /* + * If the digi_maxchar constraint now holds, limit + * the transmit count accordingly, and arrange to + * be rescheduled when the queue becomes empty. + */ + + if (space > tmax) { + space = tmax; + un_flag = UN_EMPTY; + } + + } + /* + * Handle the terminal device. + */ + else { + + /* + * If the printer device is on, turn it off. + */ + + if ((ch->ch_flag & CH_PRON) != 0) { + + space -= ch->ch_digi.digi_offlen; + + drp_wmove(ch, 0, ch->ch_digi.digi_offstr, + ch->ch_digi.digi_offlen); + + ch->ch_flag &= ~CH_PRON; + } + } + + /* + * If space is 0 and its because the ch->tbuf + * is full, then Linux will handle a callback when queue + * space becomes available. + * tty_write returns count = 0 + */ + + if (space <= 0) { + /* the linux tty_io.c handles this if we return 0 */ + /* if (fp->flags & O_NONBLOCK) return -EAGAIN; */ + + un->un_flag |= UN_EMPTY; + (ch->ch_nd)->nd_tx_work = 1; + count = 0; + goto out; + } + + count = min(count, space); + + if (count > 0) { + + un->un_tbusy++; + + /* + * Copy the buffer contents to the ch_tbuf + * being careful to wrap around the circular queue + */ + + t = TBUF_MAX - ch->ch_tin; + n = count; + + if (n >= t) { + memcpy(ch->ch_tbuf + ch->ch_tin, buf, t); + if (nd->nd_dpa_debug && nd->nd_dpa_port == PORT_NUM(MINOR(tty_devnum(un->un_tty)))) + dgrp_dpa_data(nd, 0, (char *) buf, t); + buf += t; + n -= t; + ch->ch_tin = 0; + sendcount += n; + } + + memcpy(ch->ch_tbuf + ch->ch_tin, buf, n); + if (nd->nd_dpa_debug && nd->nd_dpa_port == PORT_NUM(MINOR(tty_devnum(un->un_tty)))) + dgrp_dpa_data(nd, 0, (char *) buf, n); + buf += n; + ch->ch_tin += n; + sendcount += n; + + un->un_tbusy--; + (ch->ch_nd)->nd_tx_work = 1; + if (ch->ch_edelay != DGRP_RTIME) { + (ch->ch_nd)->nd_tx_ready = 1; + wake_up_interruptible(&nd->nd_tx_waitq); + } + } + + ch->ch_txcount += count; + + if (IS_PRINT(MINOR(tty_devnum(tty)))) { + + /* + * Adjust ch_cpstime to account + * for the characters just output. + */ + + if (sendcount > 0) { + int cc = HZ * sendcount + ch->ch_cpsrem; + + ch->ch_cpstime += cc / ch->ch_digi.digi_maxcps; + ch->ch_cpsrem = cc % ch->ch_digi.digi_maxcps; + } + + /* + * If we are now waiting on time, schedule ourself + * back when we'll be able to send a block of + * digi_maxchar characters. + */ + + if ((un_flag & UN_TIME) != 0) { + ch->ch_waketime = (ch->ch_cpstime + + (ch->ch_digi.digi_maxchar * HZ / + ch->ch_digi.digi_maxcps)); + } + } + + /* + * If the printer unit is waiting for completion + * of terminal output, get him going again. + */ + + if ((ch->ch_pun.un_flag & UN_PWAIT) != 0) + (ch->ch_nd)->nd_tx_work = 1; + +out: + spin_unlock_irqrestore(&dgrp_poll_data.poll_lock, lock_flags); + + return count; +} + + +/* + * Put a character into ch->ch_buf + * + * - used by the line discipline for OPOST processing + */ + +static int dgrp_tty_put_char(struct tty_struct *tty, unsigned char new_char) +{ + struct un_struct *un; + struct ch_struct *ch; + ulong lock_flags; + int space; + int retval = 0; + + if (tty == NULL) + return 0; + + un = tty->driver_data; + if (!un) + return 0; + + ch = un->un_ch; + if (!ch) + return 0; + + if (ch->ch_state != CS_READY) + return 0; + + spin_lock_irqsave(&dgrp_poll_data.poll_lock, lock_flags); + + + /* + * If space is 0 and its because the ch->tbuf + * Warn and dump the character, there isn't anything else + * we can do about it. David_Fries@digi.com + */ + + space = (ch->ch_tout - ch->ch_tin - 1) & TBUF_MASK; + + un->un_tbusy++; + + /* + * Output the printer on string if device is TXPrint. + */ + if (IS_PRINT(MINOR(tty_devnum(tty))) && (ch->ch_flag & CH_PRON) == 0) { + if (space < ch->ch_digi.digi_onlen) { + un->un_tbusy--; + goto out; + } + space -= ch->ch_digi.digi_onlen; + drp_wmove(ch, 0, ch->ch_digi.digi_onstr, + ch->ch_digi.digi_onlen); + ch->ch_flag |= CH_PRON; + } + + /* + * Output the printer off string if device is NOT TXPrint. + */ + + if (!IS_PRINT(MINOR(tty_devnum(tty))) && + ((ch->ch_flag & CH_PRON) != 0)) { + if (space < ch->ch_digi.digi_offlen) { + un->un_tbusy--; + goto out; + } + + space -= ch->ch_digi.digi_offlen; + drp_wmove(ch, 0, ch->ch_digi.digi_offstr, + ch->ch_digi.digi_offlen); + ch->ch_flag &= ~CH_PRON; + } + + if (!space) { + un->un_tbusy--; + goto out; + } + + /* + * Copy the character to the ch_tbuf being + * careful to wrap around the circular queue + */ + ch->ch_tbuf[ch->ch_tin] = new_char; + ch->ch_tin = (1 + ch->ch_tin) & TBUF_MASK; + + if (IS_PRINT(MINOR(tty_devnum(tty)))) { + + /* + * Adjust ch_cpstime to account + * for the character just output. + */ + + int cc = HZ + ch->ch_cpsrem; + + ch->ch_cpstime += cc / ch->ch_digi.digi_maxcps; + ch->ch_cpsrem = cc % ch->ch_digi.digi_maxcps; + + /* + * If we are now waiting on time, schedule ourself + * back when we'll be able to send a block of + * digi_maxchar characters. + */ + + ch->ch_waketime = (ch->ch_cpstime + + (ch->ch_digi.digi_maxchar * HZ / + ch->ch_digi.digi_maxcps)); + } + + + un->un_tbusy--; + (ch->ch_nd)->nd_tx_work = 1; + + retval = 1; +out: + spin_unlock_irqrestore(&dgrp_poll_data.poll_lock, lock_flags); + return retval; +} + + + +/* + * Flush TX buffer (make in == out) + * + * check tty_ioctl.c -- this is called after TCOFLUSH + */ +static void dgrp_tty_flush_buffer(struct tty_struct *tty) +{ + struct un_struct *un; + struct ch_struct *ch; + + if (!tty) + return; + un = tty->driver_data; + if (!un) + return; + + ch = un->un_ch; + if (!ch) + return; + + ch->ch_tout = ch->ch_tin; + /* do NOT do this here! */ + /* ch->ch_s_tpos = ch->ch_s_tin = 0; */ + + /* send the flush output command now */ + ch->ch_send |= RR_TX_FLUSH; + (ch->ch_nd)->nd_tx_ready = 1; + (ch->ch_nd)->nd_tx_work = 1; + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + + if (waitqueue_active(&tty->write_wait)) + wake_up_interruptible(&tty->write_wait); + + tty_wakeup(tty); + +} + +/* + * Return space available in Tx buffer + * count = ( ch->ch_tout - ch->ch_tin ) mod (TBUF_MAX - 1) + */ +static int dgrp_tty_write_room(struct tty_struct *tty) +{ + struct un_struct *un; + struct ch_struct *ch; + int count; + + if (!tty) + return 0; + + un = tty->driver_data; + if (!un) + return 0; + + ch = un->un_ch; + if (!ch) + return 0; + + count = (ch->ch_tout - ch->ch_tin - 1) & TBUF_MASK; + + /* We *MUST* check this, and return 0 if the Printer Unit cannot + * take any more data within its time constraints... If we don't + * return 0 and the printer has hit it time constraint, the ld will + * call us back doing a put_char, which cannot be rejected!!! + */ + if (IS_PRINT(MINOR(tty_devnum(tty)))) { + int un_flag = 0; + count = dgrp_calculate_txprint_bounds(ch, count, &un_flag); + if (count <= 0) + count = 0; + + ch->ch_pun.un_flag |= un_flag; + (ch->ch_nd)->nd_tx_work = 1; + } + + return count; +} + +/* + * Return number of characters that have not been transmitted yet. + * chars_in_buffer = ( ch->ch_tin - ch->ch_tout ) mod (TBUF_MAX - 1) + * + ( ch->ch_s_tin - ch->ch_s_tout ) mod (0xffff) + * = number of characters "in transit" + * + * Remember that sequence number math is always with a sixteen bit + * mask, not the TBUF_MASK. + */ + +static int dgrp_tty_chars_in_buffer(struct tty_struct *tty) +{ + struct un_struct *un; + struct ch_struct *ch; + int count; + int count1; + + if (!tty) + return 0; + + un = tty->driver_data; + if (!un) + return 0; + + ch = un->un_ch; + if (!ch) + return 0; + + count1 = count = (ch->ch_tin - ch->ch_tout) & TBUF_MASK; + count += (ch->ch_s_tin - ch->ch_s_tpos) & 0xffff; + /* one for tbuf, one for the PS */ + + /* + * If we are busy transmitting add 1 + */ + count += un->un_tbusy; + + return count; +} + + +/***************************************************************************** + * + * Helper applications for dgrp_tty_ioctl() + * + ***************************************************************************** + */ + + +/** + * ch_to_tty_flags() -- convert channel flags to termio flags + * @ch_flag: Digi channel flags + * @flagtype: type of ch_flag (iflag, oflag or cflag) + * + * take the channel flags of the specified type and return the + * corresponding termio flag + */ +static tcflag_t ch_to_tty_flags(ushort ch_flag, char flagtype) +{ + tcflag_t retval = 0; + + switch (flagtype) { + case 'i': + retval = ((ch_flag & IF_IGNBRK) ? IGNBRK : 0) + | ((ch_flag & IF_BRKINT) ? BRKINT : 0) + | ((ch_flag & IF_IGNPAR) ? IGNPAR : 0) + | ((ch_flag & IF_PARMRK) ? PARMRK : 0) + | ((ch_flag & IF_INPCK) ? INPCK : 0) + | ((ch_flag & IF_ISTRIP) ? ISTRIP : 0) + | ((ch_flag & IF_IXON) ? IXON : 0) + | ((ch_flag & IF_IXANY) ? IXANY : 0) + | ((ch_flag & IF_IXOFF) ? IXOFF : 0); + break; + + case 'o': + retval = ((ch_flag & OF_OLCUC) ? OLCUC : 0) + | ((ch_flag & OF_ONLCR) ? ONLCR : 0) + | ((ch_flag & OF_OCRNL) ? OCRNL : 0) + | ((ch_flag & OF_ONOCR) ? ONOCR : 0) + | ((ch_flag & OF_ONLRET) ? ONLRET : 0) + /* | ((ch_flag & OF_OTAB3) ? OFILL : 0) */ + | ((ch_flag & OF_TABDLY) ? TABDLY : 0); + break; + + case 'c': + retval = ((ch_flag & CF_CSTOPB) ? CSTOPB : 0) + | ((ch_flag & CF_CREAD) ? CREAD : 0) + | ((ch_flag & CF_PARENB) ? PARENB : 0) + | ((ch_flag & CF_PARODD) ? PARODD : 0) + | ((ch_flag & CF_HUPCL) ? HUPCL : 0); + + switch (ch_flag & CF_CSIZE) { + case CF_CS5: + retval |= CS5; + break; + case CF_CS6: + retval |= CS6; + break; + case CF_CS7: + retval |= CS7; + break; + case CF_CS8: + retval |= CS8; + break; + default: + retval |= CS8; + break; + } + break; + case 'x': + break; + case 'l': + break; + default: + return 0; + } + + return retval; +} + + +/** + * tty_to_ch_flags() -- convert termio flags to digi channel flags + * @tty: pointer to a TTY structure holding flag to be converted + * @flagtype: identifies which flag (iflags, oflags, or cflags) should + * be converted + * + * take the termio flag of the specified type and return the + * corresponding Digi version of the flags + */ +static ushort tty_to_ch_flags(struct tty_struct *tty, char flagtype) +{ + ushort retval = 0; + tcflag_t tflag = 0; + + switch (flagtype) { + case 'i': + tflag = tty->termios.c_iflag; + retval = (I_IGNBRK(tty) ? IF_IGNBRK : 0) + | (I_BRKINT(tty) ? IF_BRKINT : 0) + | (I_IGNPAR(tty) ? IF_IGNPAR : 0) + | (I_PARMRK(tty) ? IF_PARMRK : 0) + | (I_INPCK(tty) ? IF_INPCK : 0) + | (I_ISTRIP(tty) ? IF_ISTRIP : 0) + | (I_IXON(tty) ? IF_IXON : 0) + | (I_IXANY(tty) ? IF_IXANY : 0) + | (I_IXOFF(tty) ? IF_IXOFF : 0); + break; + case 'o': + tflag = tty->termios.c_oflag; + /* + * If OPOST is set, then do the post processing in the + * firmware by setting all the processing flags on. + * If ~OPOST, then make sure we are not doing any + * output processing!! + */ + if (!O_OPOST(tty)) + retval = 0; + else + retval = (O_OLCUC(tty) ? OF_OLCUC : 0) + | (O_ONLCR(tty) ? OF_ONLCR : 0) + | (O_OCRNL(tty) ? OF_OCRNL : 0) + | (O_ONOCR(tty) ? OF_ONOCR : 0) + | (O_ONLRET(tty) ? OF_ONLRET : 0) + /* | (O_OFILL(tty) ? OF_TAB3 : 0) */ + | (O_TABDLY(tty) ? OF_TABDLY : 0); + break; + case 'c': + tflag = tty->termios.c_cflag; + retval = (C_CSTOPB(tty) ? CF_CSTOPB : 0) + | (C_CREAD(tty) ? CF_CREAD : 0) + | (C_PARENB(tty) ? CF_PARENB : 0) + | (C_PARODD(tty) ? CF_PARODD : 0) + | (C_HUPCL(tty) ? CF_HUPCL : 0); + switch (C_CSIZE(tty)) { + case CS8: + retval |= CF_CS8; + break; + case CS7: + retval |= CF_CS7; + break; + case CS6: + retval |= CF_CS6; + break; + case CS5: + retval |= CF_CS5; + break; + default: + retval |= CF_CS8; + break; + } + break; + case 'x': + break; + case 'l': + break; + default: + return 0; + } + + return retval; +} + + +static int dgrp_tty_send_break(struct tty_struct *tty, int msec) +{ + struct un_struct *un; + struct ch_struct *ch; + int ret = -EIO; + + if (!tty) + return ret; + + un = tty->driver_data; + if (!un) + return ret; + + ch = un->un_ch; + if (!ch) + return ret; + + dgrp_send_break(ch, msec); + return 0; +} + + +/* + * This routine sends a break character out the serial port. + * + * duration is in 1/1000's of a second + */ +static int dgrp_send_break(struct ch_struct *ch, int msec) +{ + ulong x; + + wait_event_interruptible(ch->ch_flag_wait, + ((ch->ch_flag & CH_TX_BREAK) == 0)); + ch->ch_break_time += max(msec, 250); + ch->ch_send |= RR_TX_BREAK; + ch->ch_flag |= CH_TX_BREAK; + (ch->ch_nd)->nd_tx_work = 1; + + x = (msec * HZ) / 1000; + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + + return 0; +} + + +/* + * Return modem signals to ld. + */ +static int dgrp_tty_tiocmget(struct tty_struct *tty) +{ + unsigned int mlast; + struct un_struct *un = tty->driver_data; + struct ch_struct *ch; + + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + mlast = ((ch->ch_s_mlast & ~(DM_RTS | DM_DTR)) | + (ch->ch_mout & (DM_RTS | DM_DTR))); + + /* defined in /usr/include/asm/termios.h */ + mlast = ((mlast & DM_RTS) ? TIOCM_RTS : 0) + | ((mlast & DM_DTR) ? TIOCM_DTR : 0) + | ((mlast & DM_CD) ? TIOCM_CAR : 0) + | ((mlast & DM_RI) ? TIOCM_RNG : 0) + | ((mlast & DM_DSR) ? TIOCM_DSR : 0) + | ((mlast & DM_CTS) ? TIOCM_CTS : 0); + + return mlast; +} + + +/* + * Set modem lines + */ +static int dgrp_tty_tiocmset(struct tty_struct *tty, + unsigned int set, unsigned int clear) +{ + ulong lock_flags; + struct un_struct *un = tty->driver_data; + struct ch_struct *ch; + + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + if (set & TIOCM_RTS) + ch->ch_mout |= DM_RTS; + + if (set & TIOCM_DTR) + ch->ch_mout |= DM_DTR; + + if (clear & TIOCM_RTS) + ch->ch_mout &= ~(DM_RTS); + + if (clear & TIOCM_DTR) + ch->ch_mout &= ~(DM_DTR); + + spin_lock_irqsave(&(ch->ch_nd)->nd_lock, lock_flags); + ch->ch_flag |= CH_PARAM; + (ch->ch_nd)->nd_tx_work = 1; + wake_up_interruptible(&ch->ch_flag_wait); + + spin_unlock_irqrestore(&(ch->ch_nd)->nd_lock, lock_flags); + + return 0; +} + + + +/* + * Get current modem status + */ +static int get_modem_info(struct ch_struct *ch, unsigned int *value) +{ + unsigned int mlast; + + mlast = ((ch->ch_s_mlast & ~(DM_RTS | DM_DTR)) | + (ch->ch_mout & (DM_RTS | DM_DTR))); + + /* defined in /usr/include/asm/termios.h */ + mlast = ((mlast & DM_RTS) ? TIOCM_RTS : 0) + | ((mlast & DM_DTR) ? TIOCM_DTR : 0) + | ((mlast & DM_CD) ? TIOCM_CAR : 0) + | ((mlast & DM_RI) ? TIOCM_RNG : 0) + | ((mlast & DM_DSR) ? TIOCM_DSR : 0) + | ((mlast & DM_CTS) ? TIOCM_CTS : 0); + put_user(mlast, (unsigned int __user *) value); + + return 0; +} + +/* + * Set modem lines + */ +static int set_modem_info(struct ch_struct *ch, unsigned int command, + unsigned int *value) +{ + int error; + unsigned int arg; + int mval = 0; + ulong lock_flags; + + error = access_ok(VERIFY_READ, (void __user *) value, sizeof(int)); + if (error == 0) + return -EFAULT; + + get_user(arg, (unsigned int __user *) value); + mval |= ((arg & TIOCM_RTS) ? DM_RTS : 0) + | ((arg & TIOCM_DTR) ? DM_DTR : 0); + + switch (command) { + case TIOCMBIS: /* set flags */ + ch->ch_mout |= mval; + break; + case TIOCMBIC: /* clear flags */ + ch->ch_mout &= ~mval; + break; + case TIOCMSET: + ch->ch_mout = mval; + break; + default: + return -EINVAL; + } + + spin_lock_irqsave(&(ch->ch_nd)->nd_lock, lock_flags); + + ch->ch_flag |= CH_PARAM; + (ch->ch_nd)->nd_tx_work = 1; + wake_up_interruptible(&ch->ch_flag_wait); + + spin_unlock_irqrestore(&(ch->ch_nd)->nd_lock, lock_flags); + + return 0; +} + + +/* + * Assign the custom baud rate to the channel structure + */ +static void dgrp_set_custom_speed(struct ch_struct *ch, int newrate) +{ + int testdiv; + int testrate_high; + int testrate_low; + + int deltahigh, deltalow; + + if (newrate < 0) + newrate = 0; + + /* + * Since the divisor is stored in a 16-bit integer, we make sure + * we don't allow any rates smaller than a 16-bit integer would allow. + * And of course, rates above the dividend won't fly. + */ + if (newrate && newrate < ((PORTSERVER_DIVIDEND / 0xFFFF) + 1)) + newrate = ((PORTSERVER_DIVIDEND / 0xFFFF) + 1); + if (newrate && newrate > PORTSERVER_DIVIDEND) + newrate = PORTSERVER_DIVIDEND; + + while (newrate > 0) { + testdiv = PORTSERVER_DIVIDEND / newrate; + + /* + * If we try to figure out what rate the PortServer would use + * with the test divisor, it will be either equal or higher + * than the requested baud rate. If we then determine the + * rate with a divisor one higher, we will get the next lower + * supported rate below the requested. + */ + testrate_high = PORTSERVER_DIVIDEND / testdiv; + testrate_low = PORTSERVER_DIVIDEND / (testdiv + 1); + + /* + * If the rate for the requested divisor is correct, just + * use it and be done. + */ + if (testrate_high == newrate) + break; + + /* + * Otherwise, pick the rate that is closer (i.e. whichever rate + * has a smaller delta). + */ + deltahigh = testrate_high - newrate; + deltalow = newrate - testrate_low; + + if (deltahigh < deltalow) + newrate = testrate_high; + else + newrate = testrate_low; + + break; + } + + ch->ch_custom_speed = newrate; + + drp_param(ch); + + return; +} + + +/* + # dgrp_tty_digiseta() + * + * Ioctl to set the information from ditty. + * + * NOTE: DIGI_IXON, DSRPACE, DCDPACE, and DTRPACE are unsupported. JAR 990922 + */ +static int dgrp_tty_digiseta(struct tty_struct *tty, + struct digi_struct *new_info) +{ + struct un_struct *un = tty->driver_data; + struct ch_struct *ch; + + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + if (copy_from_user(&ch->ch_digi, (void __user *) new_info, + sizeof(struct digi_struct))) + return -EFAULT; + + if ((ch->ch_digi.digi_flags & RTSPACE) || + (ch->ch_digi.digi_flags & CTSPACE)) + tty->termios.c_cflag |= CRTSCTS; + else + tty->termios.c_cflag &= ~CRTSCTS; + + if (ch->ch_digi.digi_maxcps < 1) + ch->ch_digi.digi_maxcps = 1; + + if (ch->ch_digi.digi_maxcps > 10000) + ch->ch_digi.digi_maxcps = 10000; + + if (ch->ch_digi.digi_bufsize < 10) + ch->ch_digi.digi_bufsize = 10; + + if (ch->ch_digi.digi_maxchar < 1) + ch->ch_digi.digi_maxchar = 1; + + if (ch->ch_digi.digi_maxchar > ch->ch_digi.digi_bufsize) + ch->ch_digi.digi_maxchar = ch->ch_digi.digi_bufsize; + + if (ch->ch_digi.digi_onlen > DIGI_PLEN) + ch->ch_digi.digi_onlen = DIGI_PLEN; + + if (ch->ch_digi.digi_offlen > DIGI_PLEN) + ch->ch_digi.digi_offlen = DIGI_PLEN; + + /* make the changes now */ + drp_param(ch); + + return 0; +} + + + +/* + * dgrp_tty_digigetedelay() + * + * Ioctl to get the current edelay setting. + * + * + * + */ +static int dgrp_tty_digigetedelay(struct tty_struct *tty, int *retinfo) +{ + struct un_struct *un; + struct ch_struct *ch; + int tmp; + + if (!retinfo) + return -EFAULT; + + if (!tty || tty->magic != TTY_MAGIC) + return -EFAULT; + + un = tty->driver_data; + + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + tmp = ch->ch_edelay; + + if (copy_to_user((void __user *) retinfo, &tmp, sizeof(*retinfo))) + return -EFAULT; + + return 0; +} + + +/* + * dgrp_tty_digisetedelay() + * + * Ioctl to set the EDELAY setting + * + */ +static int dgrp_tty_digisetedelay(struct tty_struct *tty, int *new_info) +{ + struct un_struct *un; + struct ch_struct *ch; + int new_digi; + + if (!tty || tty->magic != TTY_MAGIC) + return -EFAULT; + + un = tty->driver_data; + + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + if (copy_from_user(&new_digi, (void __user *)new_info, sizeof(int))) + return -EFAULT; + + ch->ch_edelay = new_digi; + + /* make the changes now */ + drp_param(ch); + + return 0; +} + + +/* + * The usual assortment of ioctl's + * + * note: use tty_check_change to make sure that we are not + * changing the state of a terminal when we are not a process + * in the forground. See tty_io.c + * rc = tty_check_change(tty); + * if (rc) return rc; + */ +static int dgrp_tty_ioctl(struct tty_struct *tty, unsigned int cmd, + unsigned long arg) +{ + struct un_struct *un; + struct ch_struct *ch; + int rc; + struct digiflow_struct dflow; + + if (!tty) + return -ENODEV; + + un = tty->driver_data; + if (!un) + return -ENODEV; + + ch = un->un_ch; + if (!ch) + return -ENODEV; + + switch (cmd) { + + /* + * Here are all the standard ioctl's that we MUST implement + */ + + case TCSBRK: + /* + * TCSBRK is SVID version: non-zero arg --> no break + * this behaviour is exploited by tcdrain(). + * + * According to POSIX.1 spec (7.2.2.1.2) breaks should be + * between 0.25 and 0.5 seconds + */ + + rc = tty_check_change(tty); + if (rc) + return rc; + tty_wait_until_sent(tty, 0); + + if (!arg) + rc = dgrp_send_break(ch, 250); /* 1/4 second */ + + if (dgrp_tty_chars_in_buffer(tty) != 0) + return -EINTR; + + return 0; + + case TCSBRKP: + /* support for POSIX tcsendbreak() + * + * According to POSIX.1 spec (7.2.2.1.2) breaks should be + * between 0.25 and 0.5 seconds so we'll ask for something + * in the middle: 0.375 seconds. + */ + rc = tty_check_change(tty); + if (rc) + return rc; + tty_wait_until_sent(tty, 0); + + rc = dgrp_send_break(ch, arg ? arg*250 : 250); + + if (dgrp_tty_chars_in_buffer(tty) != 0) + return -EINTR; + return 0; + + case TIOCSBRK: + rc = tty_check_change(tty); + if (rc) + return rc; + tty_wait_until_sent(tty, 0); + + /* + * RealPort doesn't support turning on a break unconditionally. + * The RealPort device will stop sending a break automatically + * after the specified time value that we send in. + */ + rc = dgrp_send_break(ch, 250); /* 1/4 second */ + + if (dgrp_tty_chars_in_buffer(tty) != 0) + return -EINTR; + return 0; + + case TIOCCBRK: + /* + * RealPort doesn't support turning off a break unconditionally. + * The RealPort device will stop sending a break automatically + * after the specified time value that was sent when turning on + * the break. + */ + return 0; + + case TIOCGSOFTCAR: + rc = access_ok(VERIFY_WRITE, (void __user *) arg, + sizeof(long)); + if (rc == 0) + return -EFAULT; + put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) arg); + return 0; + + case TIOCSSOFTCAR: + get_user(arg, (unsigned long __user *) arg); + tty->termios.c_cflag = + ((tty->termios.c_cflag & ~CLOCAL) | + (arg ? CLOCAL : 0)); + return 0; + + case TIOCMGET: + rc = access_ok(VERIFY_WRITE, (void __user *) arg, + sizeof(unsigned int)); + if (rc == 0) + return -EFAULT; + return get_modem_info(ch, (unsigned int *) arg); + + case TIOCMBIS: + case TIOCMBIC: + case TIOCMSET: + return set_modem_info(ch, cmd, (unsigned int *) arg); + + /* + * Here are any additional ioctl's that we want to implement + */ + + case TCFLSH: + /* + * The linux tty driver doesn't have a flush + * input routine for the driver, assuming all backed + * up data is in the line disc. buffers. However, + * we all know that's not the case. Here, we + * act on the ioctl, but then lie and say we didn't + * so the line discipline will process the flush + * also. + */ + rc = tty_check_change(tty); + if (rc) + return rc; + + switch (arg) { + case TCIFLUSH: + case TCIOFLUSH: + /* only flush input if this is the only open unit */ + if (!IS_PRINT(MINOR(tty_devnum(tty)))) { + ch->ch_rout = ch->ch_rin; + ch->ch_send |= RR_RX_FLUSH; + (ch->ch_nd)->nd_tx_work = 1; + (ch->ch_nd)->nd_tx_ready = 1; + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + } + if (arg == TCIFLUSH) + break; + + case TCOFLUSH: /* flush output, or the receive buffer */ + /* + * This is handled in the tty_ioctl.c code + * calling tty_flush_buffer + */ + break; + + default: + /* POSIX.1 says return EINVAL if we got a bad arg */ + return -EINVAL; + } + /* pretend we didn't recognize this IOCTL */ + return -ENOIOCTLCMD; + +#ifdef TIOCGETP + case TIOCGETP: +#endif + /***************************************** + Linux HPUX Function + TCSETA TCSETA - set the termios + TCSETAF TCSETAF - wait for drain first, then set termios + TCSETAW TCSETAW - wait for drain, flush the input queue, then set termios + - looking at the tty_ioctl code, these command all call our + tty_set_termios at the driver's end, when a TCSETA* is sent, + it is expecting the tty to have a termio structure, + NOT a termios stucture. These two structures differ in size + and the tty_ioctl code does a conversion before processing them both. + - we should treat the TCSETAW TCSETAF ioctls the same, and let + the tty_ioctl code do the conversion stuff. + + TCSETS + TCSETSF (none) + TCSETSW + - the associated tty structure has a termios structure. + *****************************************/ + + case TCGETS: + case TCGETA: + return -ENOIOCTLCMD; + + case TCSETAW: + case TCSETAF: + case TCSETSF: + case TCSETSW: + /* + * The linux tty driver doesn't have a flush + * input routine for the driver, assuming all backed + * up data is in the line disc. buffers. However, + * we all know that's not the case. Here, we + * act on the ioctl, but then lie and say we didn't + * so the line discipline will process the flush + * also. + */ + + /* + * Also, now that we have TXPrint, we have to check + * if this is the TXPrint device and the terminal + * device is open. If so, do NOT run check_change, + * as the terminal device is ALWAYS the parent. + */ + if (!IS_PRINT(MINOR(tty_devnum(tty))) || + !ch->ch_tun.un_open_count) { + rc = tty_check_change(tty); + if (rc) + return rc; + } + + /* wait for all the characters in tbuf to drain */ + tty_wait_until_sent(tty, 0); + + if ((cmd == TCSETSF) || (cmd == TCSETAF)) { + /* flush the contents of the rbuf queue */ + /* TODO: check if this is print device? */ + ch->ch_send |= RR_RX_FLUSH; + (ch->ch_nd)->nd_tx_ready = 1; + (ch->ch_nd)->nd_tx_work = 1; + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + /* do we need to do this? just to be safe! */ + ch->ch_rout = ch->ch_rin; + } + + /* pretend we didn't recognize this */ + return -ENOIOCTLCMD; + + case TCXONC: + /* + * The Linux Line Discipline (LD) would do this for us if we + * let it, but we have the special firmware options to do this + * the "right way" regardless of hardware or software flow + * control so we'll do it outselves instead of letting the LD + * do it. + */ + rc = tty_check_change(tty); + if (rc) + return rc; + + switch (arg) { + case TCOON: + dgrp_tty_start(tty); + return 0; + case TCOOFF: + dgrp_tty_stop(tty); + return 0; + case TCION: + dgrp_tty_input_start(tty); + return 0; + case TCIOFF: + dgrp_tty_input_stop(tty); + return 0; + default: + return -EINVAL; + } + + case DIGI_GETA: + /* get information for ditty */ + if (copy_to_user((struct digi_struct __user *) arg, + &ch->ch_digi, sizeof(struct digi_struct))) + return -EFAULT; + break; + + case DIGI_SETAW: + case DIGI_SETAF: + /* wait for all the characters in tbuf to drain */ + tty_wait_until_sent(tty, 0); + + if (cmd == DIGI_SETAF) { + /* flush the contents of the rbuf queue */ + /* send down a packet with RR_RX_FLUSH set */ + ch->ch_send |= RR_RX_FLUSH; + (ch->ch_nd)->nd_tx_ready = 1; + (ch->ch_nd)->nd_tx_work = 1; + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + /* do we need to do this? just to be safe! */ + ch->ch_rout = ch->ch_rin; + } + + /* pretend we didn't recognize this */ + + case DIGI_SETA: + return dgrp_tty_digiseta(tty, (struct digi_struct *) arg); + + case DIGI_SEDELAY: + return dgrp_tty_digisetedelay(tty, (int *) arg); + + case DIGI_GEDELAY: + return dgrp_tty_digigetedelay(tty, (int *) arg); + + case DIGI_GETFLOW: + case DIGI_GETAFLOW: + if (cmd == (DIGI_GETFLOW)) { + dflow.startc = tty->termios.c_cc[VSTART]; + dflow.stopc = tty->termios.c_cc[VSTOP]; + } else { + dflow.startc = ch->ch_xxon; + dflow.stopc = ch->ch_xxoff; + } + + if (copy_to_user((char __user *)arg, &dflow, sizeof(dflow))) + return -EFAULT; + break; + + case DIGI_SETFLOW: + case DIGI_SETAFLOW: + + if (copy_from_user(&dflow, (char __user *)arg, sizeof(dflow))) + return -EFAULT; + + if (cmd == (DIGI_SETFLOW)) { + tty->termios.c_cc[VSTART] = dflow.startc; + tty->termios.c_cc[VSTOP] = dflow.stopc; + } else { + ch->ch_xxon = dflow.startc; + ch->ch_xxoff = dflow.stopc; + } + break; + + case DIGI_GETCUSTOMBAUD: + rc = access_ok(VERIFY_WRITE, (void __user *) arg, sizeof(int)); + if (rc == 0) + return -EFAULT; + put_user(ch->ch_custom_speed, (unsigned int __user *) arg); + break; + + case DIGI_SETCUSTOMBAUD: + { + int new_rate; + + get_user(new_rate, (unsigned int __user *) arg); + dgrp_set_custom_speed(ch, new_rate); + + break; + } + + default: + return -ENOIOCTLCMD; + } + + return 0; +} + +/* + * This routine allows the tty driver to be notified when + * the device's termios setting have changed. Note that we + * should be prepared to accept the case where old == NULL + * and try to do something rational. + * + * So we need to make sure that our copies of ch_oflag, + * ch_clag, and ch_iflag reflect the tty->termios flags. + */ +static void dgrp_tty_set_termios(struct tty_struct *tty, struct ktermios *old) +{ + struct ktermios *ts; + struct ch_struct *ch; + struct un_struct *un; + + /* seems silly, but we have to check all these! */ + if (!tty) + return; + + un = tty->driver_data; + if (!un) + return; + + ts = &tty->termios; + + ch = un->un_ch; + if (!ch) + return; + + drp_param(ch); + + /* the CLOCAL flag has just been set */ + if (!(old->c_cflag & CLOCAL) && C_CLOCAL(tty)) + wake_up_interruptible(&un->un_open_wait); +} + + +/* + * Throttle receiving data. We just set a bit and stop reading + * data out of the channel buffer. It will back up and the + * FEP will do whatever is necessary to stop the far end. + */ +static void dgrp_tty_throttle(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + ch->ch_flag |= CH_RXSTOP; +} + + +static void dgrp_tty_unthrottle(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + ch->ch_flag &= ~CH_RXSTOP; +} + +/* + * Stop the transmitter + */ +static void dgrp_tty_stop(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + ch->ch_send |= RR_TX_STOP; + ch->ch_send &= ~RR_TX_START; + + /* make the change NOW! */ + (ch->ch_nd)->nd_tx_ready = 1; + if (waitqueue_active(&(ch->ch_nd)->nd_tx_waitq)) + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); +} + +/* + * Start the transmitter + */ +static void dgrp_tty_start(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + /* TODO: don't do anything if the transmitter is not stopped */ + + ch->ch_send |= RR_TX_START; + ch->ch_send &= ~RR_TX_STOP; + + /* make the change NOW! */ + (ch->ch_nd)->nd_tx_ready = 1; + (ch->ch_nd)->nd_tx_work = 1; + if (waitqueue_active(&(ch->ch_nd)->nd_tx_waitq)) + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + +} + +/* + * Stop the reciever + */ +static void dgrp_tty_input_stop(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + ch->ch_send |= RR_RX_STOP; + ch->ch_send &= ~RR_RX_START; + (ch->ch_nd)->nd_tx_ready = 1; + if (waitqueue_active(&(ch->ch_nd)->nd_tx_waitq)) + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + +} + + +static void dgrp_tty_send_xchar(struct tty_struct *tty, char c) +{ + struct un_struct *un; + struct ch_struct *ch; + + if (!tty) + return; + + un = tty->driver_data; + if (!un) + return; + + ch = un->un_ch; + if (!ch) + return; + if (c == STOP_CHAR(tty)) + ch->ch_send |= RR_RX_STOP; + else if (c == START_CHAR(tty)) + ch->ch_send |= RR_RX_START; + + ch->ch_nd->nd_tx_ready = 1; + ch->ch_nd->nd_tx_work = 1; + + return; +} + + +static void dgrp_tty_input_start(struct tty_struct *tty) +{ + struct ch_struct *ch; + + if (!tty) + return; + + ch = ((struct un_struct *) tty->driver_data)->un_ch; + if (!ch) + return; + + ch->ch_send |= RR_RX_START; + ch->ch_send &= ~RR_RX_STOP; + (ch->ch_nd)->nd_tx_ready = 1; + (ch->ch_nd)->nd_tx_work = 1; + if (waitqueue_active(&(ch->ch_nd)->nd_tx_waitq)) + wake_up_interruptible(&(ch->ch_nd)->nd_tx_waitq); + +} + + +/* + * Hangup the port. Like a close, but don't wait for output + * to drain. + * + * How do we close all the channels that are open? + */ +static void dgrp_tty_hangup(struct tty_struct *tty) +{ + struct ch_struct *ch; + struct nd_struct *nd; + struct un_struct *un; + + if (!tty) + return; + + un = tty->driver_data; + if (!un) + return; + + ch = un->un_ch; + if (!ch) + return; + + nd = ch->ch_nd; + + if (C_HUPCL(tty)) { + /* LOWER DTR */ + ch->ch_mout &= ~DM_DTR; + /* Don't do this here */ + /* ch->ch_flag |= CH_HANGUP; */ + ch->ch_nd->nd_tx_ready = 1; + ch->ch_nd->nd_tx_work = 1; + if (waitqueue_active(&ch->ch_flag_wait)) + wake_up_interruptible(&ch->ch_flag_wait); + } + +} + +/************************************************************************/ +/* */ +/* TTY Initialization/Cleanup Functions */ +/* */ +/************************************************************************/ + +/* + * Uninitialize the TTY portion of the supplied node. Free all + * memory and resources associated with this node. Do it in reverse + * allocation order: this might possibly result in less fragmentation + * of memory, though I don't know this for sure. + */ +void +dgrp_tty_uninit(struct nd_struct *nd) +{ + char id[3]; + + ID_TO_CHAR(nd->nd_ID, id); + + if (nd->nd_ttdriver_flags & SERIAL_TTDRV_REG) { + tty_unregister_driver(nd->nd_serial_ttdriver); + + kfree(nd->nd_serial_ttdriver->ttys); + nd->nd_serial_ttdriver->ttys = NULL; + + put_tty_driver(nd->nd_serial_ttdriver); + nd->nd_ttdriver_flags &= ~SERIAL_TTDRV_REG; + } + + if (nd->nd_ttdriver_flags & CALLOUT_TTDRV_REG) { + tty_unregister_driver(nd->nd_callout_ttdriver); + + kfree(nd->nd_callout_ttdriver->ttys); + nd->nd_callout_ttdriver->ttys = NULL; + + put_tty_driver(nd->nd_callout_ttdriver); + nd->nd_ttdriver_flags &= ~CALLOUT_TTDRV_REG; + } + + if (nd->nd_ttdriver_flags & XPRINT_TTDRV_REG) { + tty_unregister_driver(nd->nd_xprint_ttdriver); + + kfree(nd->nd_xprint_ttdriver->ttys); + nd->nd_xprint_ttdriver->ttys = NULL; + + put_tty_driver(nd->nd_xprint_ttdriver); + nd->nd_ttdriver_flags &= ~XPRINT_TTDRV_REG; + } +} + + + +/* + * Initialize the TTY portion of the supplied node. + */ +int +dgrp_tty_init(struct nd_struct *nd) +{ + char id[3]; + int rc; + int i; + + ID_TO_CHAR(nd->nd_ID, id); + + /* + * Initialize the TTDRIVER structures. + */ + + nd->nd_serial_ttdriver = alloc_tty_driver(CHAN_MAX); + sprintf(nd->nd_serial_name, "tty_dgrp_%s_", id); + + nd->nd_serial_ttdriver->owner = THIS_MODULE; + nd->nd_serial_ttdriver->name = nd->nd_serial_name; + nd->nd_serial_ttdriver->name_base = 0; + nd->nd_serial_ttdriver->major = 0; + nd->nd_serial_ttdriver->minor_start = 0; + nd->nd_serial_ttdriver->type = TTY_DRIVER_TYPE_SERIAL; + nd->nd_serial_ttdriver->subtype = SERIAL_TYPE_NORMAL; + nd->nd_serial_ttdriver->init_termios = DefaultTermios; + nd->nd_serial_ttdriver->driver_name = "dgrp"; + nd->nd_serial_ttdriver->flags = (TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); + + /* The kernel wants space to store pointers to tty_structs. */ + nd->nd_serial_ttdriver->ttys = + kzalloc(CHAN_MAX * sizeof(struct tty_struct *), GFP_KERNEL); + if (!nd->nd_serial_ttdriver->ttys) + return -ENOMEM; + + tty_set_operations(nd->nd_serial_ttdriver, &dgrp_tty_ops); + + if (!(nd->nd_ttdriver_flags & SERIAL_TTDRV_REG)) { + /* + * Register tty devices + */ + rc = tty_register_driver(nd->nd_serial_ttdriver); + if (rc < 0) { + /* + * If errno is EBUSY, this means there are no more + * slots available to have us auto-majored. + * (Which is currently supported up to 256) + * + * We can still request majors above 256, + * we just have to do it manually. + */ + if (rc == -EBUSY) { + int i; + int max_majors = 1U << (32 - MINORBITS); + for (i = 256; i < max_majors; i++) { + nd->nd_serial_ttdriver->major = i; + rc = tty_register_driver(nd->nd_serial_ttdriver); + if (rc >= 0) + break; + } + /* Really fail now, since we ran out + * of majors to try. */ + if (i == max_majors) + return rc; + + } else { + return rc; + } + } + nd->nd_ttdriver_flags |= SERIAL_TTDRV_REG; + } + + nd->nd_callout_ttdriver = alloc_tty_driver(CHAN_MAX); + sprintf(nd->nd_callout_name, "cu_dgrp_%s_", id); + + nd->nd_callout_ttdriver->owner = THIS_MODULE; + nd->nd_callout_ttdriver->name = nd->nd_callout_name; + nd->nd_callout_ttdriver->name_base = 0; + nd->nd_callout_ttdriver->major = nd->nd_serial_ttdriver->major; + nd->nd_callout_ttdriver->minor_start = 0x40; + nd->nd_callout_ttdriver->type = TTY_DRIVER_TYPE_SERIAL; + nd->nd_callout_ttdriver->subtype = SERIAL_TYPE_CALLOUT; + nd->nd_callout_ttdriver->init_termios = DefaultTermios; + nd->nd_callout_ttdriver->driver_name = "dgrp"; + nd->nd_callout_ttdriver->flags = (TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); + + /* The kernel wants space to store pointers to tty_structs. */ + nd->nd_callout_ttdriver->ttys = + kzalloc(CHAN_MAX * sizeof(struct tty_struct *), GFP_KERNEL); + if (!nd->nd_callout_ttdriver->ttys) + return -ENOMEM; + + tty_set_operations(nd->nd_callout_ttdriver, &dgrp_tty_ops); + + if (dgrp_register_cudevices) { + if (!(nd->nd_ttdriver_flags & CALLOUT_TTDRV_REG)) { + /* + * Register cu devices + */ + rc = tty_register_driver(nd->nd_callout_ttdriver); + if (rc < 0) + return rc; + nd->nd_ttdriver_flags |= CALLOUT_TTDRV_REG; + } + } + + + nd->nd_xprint_ttdriver = alloc_tty_driver(CHAN_MAX); + sprintf(nd->nd_xprint_name, "pr_dgrp_%s_", id); + + nd->nd_xprint_ttdriver->owner = THIS_MODULE; + nd->nd_xprint_ttdriver->name = nd->nd_xprint_name; + nd->nd_xprint_ttdriver->name_base = 0; + nd->nd_xprint_ttdriver->major = nd->nd_serial_ttdriver->major; + nd->nd_xprint_ttdriver->minor_start = 0x80; + nd->nd_xprint_ttdriver->type = TTY_DRIVER_TYPE_SERIAL; + nd->nd_xprint_ttdriver->subtype = SERIAL_TYPE_XPRINT; + nd->nd_xprint_ttdriver->init_termios = DefaultTermios; + nd->nd_xprint_ttdriver->driver_name = "dgrp"; + nd->nd_xprint_ttdriver->flags = (TTY_DRIVER_REAL_RAW | + TTY_DRIVER_DYNAMIC_DEV | + TTY_DRIVER_HARDWARE_BREAK); + + /* The kernel wants space to store pointers to tty_structs. */ + nd->nd_xprint_ttdriver->ttys = + kzalloc(CHAN_MAX * sizeof(struct tty_struct *), GFP_KERNEL); + if (!nd->nd_xprint_ttdriver->ttys) + return -ENOMEM; + + tty_set_operations(nd->nd_xprint_ttdriver, &dgrp_tty_ops); + + if (dgrp_register_prdevices) { + if (!(nd->nd_ttdriver_flags & XPRINT_TTDRV_REG)) { + /* + * Register transparent print devices + */ + rc = tty_register_driver(nd->nd_xprint_ttdriver); + if (rc < 0) + return rc; + nd->nd_ttdriver_flags |= XPRINT_TTDRV_REG; + } + } + + for (i = 0; i < CHAN_MAX; i++) { + struct ch_struct *ch = nd->nd_chan + i; + + ch->ch_nd = nd; + ch->ch_digi = digi_init; + ch->ch_edelay = 100; + ch->ch_custom_speed = 0; + ch->ch_portnum = i; + ch->ch_tun.un_ch = ch; + ch->ch_pun.un_ch = ch; + ch->ch_tun.un_type = SERIAL_TYPE_NORMAL; + ch->ch_pun.un_type = SERIAL_TYPE_XPRINT; + + init_waitqueue_head(&(ch->ch_flag_wait)); + init_waitqueue_head(&(ch->ch_sleep)); + + init_waitqueue_head(&(ch->ch_tun.un_open_wait)); + init_waitqueue_head(&(ch->ch_tun.un_close_wait)); + + init_waitqueue_head(&(ch->ch_pun.un_open_wait)); + init_waitqueue_head(&(ch->ch_pun.un_close_wait)); + tty_port_init(&ch->port); + tty_port_init(&ch->port); + } + return 0; +} diff --git a/drivers/staging/dgrp/digirp.h b/drivers/staging/dgrp/digirp.h new file mode 100644 index 00000000000..33c1394fade --- /dev/null +++ b/drivers/staging/dgrp/digirp.h @@ -0,0 +1,129 @@ +/************************************************************************ + * HP-UX Realport Daemon interface file. + * + * Copyright (C) 1998, by Digi International. All Rights Reserved. + ************************************************************************/ + +#ifndef _DIGIDRP_H +#define _DIGIDRP_H + +/************************************************************************ + * This file contains defines for the ioctl() interface to + * the realport driver. This ioctl() interface is used by the + * daemon to set speed setup parameters honored by the driver. + ************************************************************************/ + +struct link_struct { + int lk_fast_rate; /* Fast line rate to be used + when the delay is less-equal + to lk_fast_delay */ + + int lk_fast_delay; /* Fast line rate delay in + milliseconds */ + + int lk_slow_rate; /* Slow line rate to be used when + the delay is greater-equal + to lk_slow_delay */ + + int lk_slow_delay; /* Slow line rate delay in + milliseconds */ + + int lk_header_size; /* Estimated packet header size + when sent across the slowest + link. */ +}; + +#define DIGI_GETLINK _IOW('e', 103, struct link_struct) /* Get link parameters */ +#define DIGI_SETLINK _IOW('e', 104, struct link_struct) /* Set link parameters */ + + +/************************************************************************ + * This module provides application access to special Digi + * serial line enhancements which are not standard UNIX(tm) features. + ************************************************************************/ + +struct digiflow_struct { + unsigned char startc; /* flow cntl start char */ + unsigned char stopc; /* flow cntl stop char */ +}; + +/************************************************************************ + * Values for digi_flags + ************************************************************************/ +#define DIGI_IXON 0x0001 /* Handle IXON in the FEP */ +#define DIGI_FAST 0x0002 /* Fast baud rates */ +#define RTSPACE 0x0004 /* RTS input flow control */ +#define CTSPACE 0x0008 /* CTS output flow control */ +#define DSRPACE 0x0010 /* DSR output flow control */ +#define DCDPACE 0x0020 /* DCD output flow control */ +#define DTRPACE 0x0040 /* DTR input flow control */ +#define DIGI_COOK 0x0080 /* Cooked processing done in FEP */ +#define DIGI_FORCEDCD 0x0100 /* Force carrier */ +#define DIGI_ALTPIN 0x0200 /* Alternate RJ-45 pin config */ +#define DIGI_AIXON 0x0400 /* Aux flow control in fep */ +#define DIGI_PRINTER 0x0800 /* Hold port open for flow cntrl */ +#define DIGI_PP_INPUT 0x1000 /* Change parallel port to input */ +#define DIGI_422 0x4000 /* Change parallel port to input */ +#define DIGI_RTS_TOGGLE 0x8000 /* Support RTS Toggle */ + + +/************************************************************************ + * Values associated with transparent print + ************************************************************************/ +#define DIGI_PLEN 8 /* String length */ +#define DIGI_TSIZ 10 /* Terminal string len */ + + +/************************************************************************ + * Structure used with ioctl commands for DIGI parameters. + ************************************************************************/ +struct digi_struct { + unsigned short digi_flags; /* Flags (see above) */ + unsigned short digi_maxcps; /* Max printer CPS */ + unsigned short digi_maxchar; /* Max chars in print queue */ + unsigned short digi_bufsize; /* Buffer size */ + unsigned char digi_onlen; /* Length of ON string */ + unsigned char digi_offlen; /* Length of OFF string */ + char digi_onstr[DIGI_PLEN]; /* Printer on string */ + char digi_offstr[DIGI_PLEN]; /* Printer off string */ + char digi_term[DIGI_TSIZ]; /* terminal string */ +}; + +/************************************************************************ + * Ioctl command arguments for DIGI parameters. + ************************************************************************/ +/* Read params */ +#define DIGI_GETA _IOR('e', 94, struct digi_struct) + +/* Set params */ +#define DIGI_SETA _IOW('e', 95, struct digi_struct) + +/* Drain & set params */ +#define DIGI_SETAW _IOW('e', 96, struct digi_struct) + +/* Drain, flush & set params */ +#define DIGI_SETAF _IOW('e', 97, struct digi_struct) + +/* Get startc/stopc flow control characters */ +#define DIGI_GETFLOW _IOR('e', 99, struct digiflow_struct) + +/* Set startc/stopc flow control characters */ +#define DIGI_SETFLOW _IOW('e', 100, struct digiflow_struct) + +/* Get Aux. startc/stopc flow control chars */ +#define DIGI_GETAFLOW _IOR('e', 101, struct digiflow_struct) + +/* Set Aux. startc/stopc flow control chars */ +#define DIGI_SETAFLOW _IOW('e', 102, struct digiflow_struct) + +/* Set integer baud rate */ +#define DIGI_SETCUSTOMBAUD _IOW('e', 106, int) + +/* Get integer baud rate */ +#define DIGI_GETCUSTOMBAUD _IOR('e', 107, int) + +#define DIGI_GEDELAY _IOR('d', 246, int) /* Get edelay */ +#define DIGI_SEDELAY _IOW('d', 247, int) /* Get edelay */ + + +#endif /* _DIGIDRP_H */ diff --git a/drivers/staging/dgrp/drp.h b/drivers/staging/dgrp/drp.h new file mode 100644 index 00000000000..84a1e7be489 --- /dev/null +++ b/drivers/staging/dgrp/drp.h @@ -0,0 +1,693 @@ +/* + * + * Copyright 1999 Digi International (www.digi.com) + * Gene Olson + * James Puzzo + * Scott Kilau + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY, EXPRESS OR IMPLIED; without even the + * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR + * PURPOSE. See the GNU General Public License for more details. + * + */ + +/************************************************************************ + * Master include file for Linux Realport Driver. + ************************************************************************/ + +#ifndef __DRP_H +#define __DRP_H + +#include +#include +#include +#include + + +#include "digirp.h" + +/************************************************************************ + * Tuning parameters. + ************************************************************************/ + +#define CHAN_MAX 64 /* Max # ports per server */ + +#define SEQ_MAX 128 /* Max # transmit sequences (2^n) */ +#define SEQ_MASK (SEQ_MAX-1) /* Sequence buffer modulus mask */ + +#define TBUF_MAX 4096 /* Size of transmit buffer (2^n) */ +#define RBUF_MAX 4096 /* Size of receive buffer (2^n) */ + +#define TBUF_MASK (TBUF_MAX-1) /* Transmit buffer modulus mask */ +#define RBUF_MASK (RBUF_MAX-1) /* Receive buffer modulus mask */ + +#define TBUF_LOW 1000 /* Transmit low water mark */ + +#define UIO_BASE 1000 /* Base for write operations */ +#define UIO_MIN 2000 /* Minimum size application buffer */ +#define UIO_MAX 8100 /* Unix I/O buffer size */ + +#define MON_MAX 65536 /* Monitor buffer size (2^n) */ +#define MON_MASK (MON_MAX-1) /* Monitor wrap mask */ + +#define DPA_MAX 65536 /* DPA buffer size (2^n) */ +#define DPA_MASK (DPA_MAX-1) /* DPA wrap mask */ +#define DPA_HIGH_WATER 58000 /* Enforce flow control when + * over this amount + */ + +#define IDLE_MAX (20 * HZ) /* Max TCP link idle time */ + +#define MAX_DESC_LEN 100 /* Maximum length of stored PS + * description + */ + +#define WRITEBUFLEN ((4096) + 4) /* 4 extra for alignment play space */ + +#define VPDSIZE 512 + +/************************************************************************ + * Minor device decoding conventions. + ************************************************************************ + * + * For Linux, the net and mon devices are handled via "proc", so we + * only have to mux the "tty" devices. Since every PortServer will + * have an individual major number, the PortServer number does not + * need to be encoded, and in fact, does not need to exist. + * + */ + +/* + * Port device decoding conventions: + * + * Device 00 - 3f 64 dial-in modem devices. (tty) + * Device 40 - 7f 64 dial-out tty devices. (cu) + * Device 80 - bf 64 dial-out printer devices. + * + * IS_PRINT(dev) This is a printer device. + * + * OPEN_CATEGORY(dev) Specifies the device category. No two + * devices of different categories may be open + * at the same time. + * + * The following require the category returned by OPEN_CATEGORY(). + * + * OPEN_WAIT_AVAIL(cat) Waits on open until the device becomes + * available. Fails if NDELAY specified. + * + * OPEN_WAIT_CARRIER(cat) Waits on open if carrier is not present. + * Succeeds if NDELAY is given. + * + * OPEN_FORCES_CARRIER(cat) Carrier is forced high on open. + * + */ + +#define PORT_NUM(dev) ((dev) & 0x3f) + +#define OPEN_CATEGORY(dev) ((((dev) & 0x80) & 0x40)) +#define IS_PRINT(dev) (((dev) & 0xff) >= 0x80) + +#define OPEN_WAIT_AVAIL(cat) (((cat) & 0x40) == 0x000) +#define OPEN_WAIT_CARRIER(cat) (((cat) & 0x40) == 0x000) +#define OPEN_FORCES_CARRIER(cat) (((cat) & 0x40) != 0x000) + + +/************************************************************************ + * Modem signal defines for 16450/16550 compatible FEP. + * set in ch_mout, ch_mflow, ch_mlast etc + ************************************************************************/ + +/* TODO : Re-verify that these modem signal definitions are correct */ + +#define DM_DTR 0x01 +#define DM_RTS 0x02 +#define DM_RTS_TOGGLE 0x04 + +#define DM_OUT1 0x04 +#define DM_OUT2 0x08 + +#define DM_CTS 0x10 +#define DM_DSR 0x20 +#define DM_RI 0x40 +#define DM_CD 0x80 /* This is the DCD flag */ + + +/************************************************************************ + * Realport Event Flags. + ************************************************************************/ + +#define EV_OPU 0x0001 /* Ouput paused by client */ +#define EV_OPS 0x0002 /* Output paused by XOFF */ +#define EV_OPX 0x0004 /* Output paused by XXOFF */ +#define EV_OPH 0x0008 /* Output paused by MFLOW */ +#define EV_IPU 0x0010 /* Input paused by client */ +#define EV_IPS 0x0020 /* Input paused by hi/low water */ +#define EV_TXB 0x0040 /* Transmit break pending */ +#define EV_TXI 0x0080 /* Transmit immediate pending */ +#define EV_TXF 0x0100 /* Transmit flow control pending */ +#define EV_RXB 0x0200 /* Break received */ + + +/************************************************************************ + * Realport CFLAGS. + ************************************************************************/ + +#define CF_CS5 0x0000 /* 5 bit characters */ +#define CF_CS6 0x0010 /* 6 bit characters */ +#define CF_CS7 0x0020 /* 7 bit characters */ +#define CF_CS8 0x0030 /* 8 bit characters */ +#define CF_CSIZE 0x0030 /* Character size */ +#define CF_CSTOPB 0x0040 /* Two stop bits */ +#define CF_CREAD 0x0080 /* Enable receiver */ +#define CF_PARENB 0x0100 /* Enable parity */ +#define CF_PARODD 0x0200 /* Odd parity */ +#define CF_HUPCL 0x0400 /* Drop DTR on close */ + + +/************************************************************************ + * Realport XFLAGS. + ************************************************************************/ + +#define XF_XPAR 0x0001 /* Enable Mark/Space Parity */ +#define XF_XMODEM 0x0002 /* Enable in-band modem signalling */ +#define XF_XCASE 0x0004 /* Convert special characters */ +#define XF_XEDATA 0x0008 /* Error data in stream */ +#define XF_XTOSS 0x0010 /* Toss IXANY characters */ +#define XF_XIXON 0x0020 /* xxon/xxoff enable */ + + +/************************************************************************ + * Realport IFLAGS. + ************************************************************************/ + +#define IF_IGNBRK 0x0001 /* Ignore input break */ +#define IF_BRKINT 0x0002 /* Break interrupt */ +#define IF_IGNPAR 0x0004 /* Ignore error characters */ +#define IF_PARMRK 0x0008 /* Error chars marked with 0xff */ +#define IF_INPCK 0x0010 /* Input parity checking enabled */ +#define IF_ISTRIP 0x0020 /* Input chars masked with 0x7F */ +#define IF_IXON 0x0400 /* Output software flow control */ +#define IF_IXANY 0x0800 /* Restart output on any char */ +#define IF_IXOFF 0x1000 /* Input software flow control */ +#define IF_DOSMODE 0x8000 /* 16450-compatible errors */ + + +/************************************************************************ + * Realport OFLAGS. + ************************************************************************/ + +#define OF_OLCUC 0x0002 /* Map lower to upper case */ +#define OF_ONLCR 0x0004 /* Map NL to CR-NL */ +#define OF_OCRNL 0x0008 /* Map CR to NL */ +#define OF_ONOCR 0x0010 /* No CR output at column 0 */ +#define OF_ONLRET 0x0020 /* Assume NL does NL/CR */ +#define OF_TAB3 0x1800 /* Tabs expand to 8 spaces */ +#define OF_TABDLY 0x1800 /* Tab delay */ + +/************************************************************************ + * Unit flag definitions for un_flag. + ************************************************************************/ + +/* These are the DIGI unit flags */ +#define UN_EXCL 0x00010000 /* Exclusive open */ +#define UN_STICKY 0x00020000 /* TTY Settings are now sticky */ +#define UN_BUSY 0x00040000 /* Some work this channel */ +#define UN_PWAIT 0x00080000 /* Printer waiting for terminal */ +#define UN_TIME 0x00100000 /* Waiting on time */ +#define UN_EMPTY 0x00200000 /* Waiting output queue empty */ +#define UN_LOW 0x00400000 /* Waiting output low water */ +#define UN_DIGI_MASK 0x00FF0000 /* Waiting output low water */ + +/* + * Definitions for async_struct (and serial_struct) flags field + * + * these are the ASYNC flags copied from serial.h + * + */ +#define UN_HUP_NOTIFY 0x0001 /* Notify getty on hangups and + * closes on the callout port + */ +#define UN_FOURPORT 0x0002 /* Set OU1, OUT2 per AST Fourport settings */ +#define UN_SAK 0x0004 /* Secure Attention Key (Orange book) */ +#define UN_SPLIT_TERMIOS 0x0008 /* Separate termios for dialin/callout */ + +#define UN_SPD_MASK 0x0030 +#define UN_SPD_HI 0x0010 /* Use 56000 instead of 38400 bps */ +#define UN_SPD_VHI 0x0020 /* Use 115200 instead of 38400 bps */ +#define UN_SPD_CUST 0x0030 /* Use user-specified divisor */ + +#define UN_SKIP_TEST 0x0040 /* Skip UART test during autoconfiguration */ +#define UN_AUTO_IRQ 0x0080 /* Do automatic IRQ during autoconfiguration */ + +#define UN_SESSION_LOCKOUT 0x0100 /* Lock out cua opens based on session */ +#define UN_PGRP_LOCKOUT 0x0200 /* Lock out cua opens based on pgrp */ +#define UN_CALLOUT_NOHUP 0x0400 /* Don't do hangups for cua device */ + +#define UN_FLAGS 0x0FFF /* Possible legal async flags */ +#define UN_USR_MASK 0x0430 /* Legal flags that non-privileged + * users can set or reset + */ + +#define UN_INITIALIZED 0x80000000 /* Serial port was initialized */ +#define UN_CALLOUT_ACTIVE 0x40000000 /* Call out device is active */ +#define UN_NORMAL_ACTIVE 0x20000000 /* Normal device is active */ +#define UN_BOOT_AUTOCONF 0x10000000 /* Autoconfigure port on bootup */ +#define UN_CLOSING 0x08000000 /* Serial port is closing */ +#define UN_CTS_FLOW 0x04000000 /* Do CTS flow control */ +#define UN_CHECK_CD 0x02000000 /* i.e., CLOCAL */ +#define UN_SHARE_IRQ 0x01000000 /* for multifunction cards */ + + +/************************************************************************ + * Structure for terminal or printer unit. struct un_struct + * + * Note that in some places the code assumes the "tty_t" is placed + * first in the structure. + ************************************************************************/ + +struct un_struct { + struct tty_struct *un_tty; /* System TTY struct */ + struct ch_struct *un_ch; /* Associated channel */ + + ushort un_open_count; /* Successful open count */ + int un_flag; /* Unit flags */ + ushort un_tbusy; /* Busy transmit count */ + + wait_queue_head_t un_open_wait; + wait_queue_head_t un_close_wait; + ushort un_type; + struct device *un_sysfs; +}; + + +/************************************************************************ + * Channel State Numbers for ch_state. + ************************************************************************/ + +/* + * The ordering is important. + * + * state <= CS_WAIT_CANCEL implies the channel is definitely closed. + * + * state >= CS_WAIT_FAIL implies the channel is definitely open. + * + * state >= CS_READY implies data is allowed on the channel. + */ + +enum dgrp_ch_state_t { + CS_IDLE = 0, /* Channel is idle */ + CS_WAIT_OPEN = 1, /* Waiting for Immediate Open Resp */ + CS_WAIT_CANCEL = 2, /* Waiting for Per/Incom Cancel Resp */ + CS_WAIT_FAIL = 3, /* Waiting for Immed Open Failure */ + CS_SEND_QUERY = 4, /* Ready to send Port Query */ + CS_WAIT_QUERY = 5, /* Waiting for Port Query Response */ + CS_READY = 6, /* Ready to accept commands and data */ + CS_SEND_CLOSE = 7, /* Ready to send Close Request */ + CS_WAIT_CLOSE = 8 /* Waiting for Close Response */ +}; + +/************************************************************************ + * Device flag definitions for ch_flag. + ************************************************************************/ + +/* + * Note that the state of the two carrier based flags is key. When + * we check for carrier state transitions, we look at the current + * physical state of the DCD line and compare it with PHYS_CD (which + * was the state the last time we checked), and we also determine + * a new virtual state (composite of the physical state, FORCEDCD, + * CLOCAL, etc.) and compare it with VIRT_CD. + * + * VIRTUAL transitions high will have the side effect of waking blocked + * opens. + * + * PHYSICAL transitions low will cause hangups to occur _IF_ the virtual + * state is also low. We DON'T want to hangup on a PURE virtual drop. + */ + +#define CH_HANGUP 0x00002 /* Server port ready to close */ + +#define CH_VIRT_CD 0x00004 /* Carrier was virtually present */ +#define CH_PHYS_CD 0x00008 /* Carrier was physically present */ + +#define CH_CLOCAL 0x00010 /* CLOCAL set in cflags */ +#define CH_BAUD0 0x00020 /* Baud rate zero hangup */ + +#define CH_FAST_READ 0x00040 /* Fast reads are enabled */ +#define CH_FAST_WRITE 0x00080 /* Fast writes are enabled */ + +#define CH_PRON 0x00100 /* Printer on string active */ +#define CH_RX_FLUSH 0x00200 /* Flushing receive data */ +#define CH_LOW 0x00400 /* Thread waiting for LOW water */ +#define CH_EMPTY 0x00800 /* Thread waiting for EMPTY */ +#define CH_DRAIN 0x01000 /* Close is waiting to drain */ +#define CH_INPUT 0x02000 /* Thread waiting for INPUT */ +#define CH_RXSTOP 0x04000 /* Stop output to ldisc */ +#define CH_PARAM 0x08000 /* A parameter was updated */ +#define CH_WAITING_SYNC 0x10000 /* A pending sync was assigned + * to this port. + */ +#define CH_PORT_GONE 0x20000 /* Port has disappeared */ +#define CH_TX_BREAK 0x40000 /* TX Break to be sent, + * but has not yet. + */ + +/************************************************************************ + * Types of Open Requests for ch_otype. + ************************************************************************/ + +#define OTYPE_IMMEDIATE 0 /* Immediate Open */ +#define OTYPE_PERSISTENT 1 /* Persistent Open */ +#define OTYPE_INCOMING 2 /* Incoming Open */ + + +/************************************************************************ + * Request/Response flags. + ************************************************************************/ + +#define RR_SEQUENCE 0x0001 /* Get server RLAST, TIN */ +#define RR_STATUS 0x0002 /* Get server MINT, EINT */ +#define RR_BUFFER 0x0004 /* Get server RSIZE, TSIZE */ +#define RR_CAPABILITY 0x0008 /* Get server port capabilities */ + +#define RR_TX_FLUSH 0x0040 /* Flush output buffers */ +#define RR_RX_FLUSH 0x0080 /* Flush input buffers */ + +#define RR_TX_STOP 0x0100 /* Pause output */ +#define RR_RX_STOP 0x0200 /* Pause input */ +#define RR_TX_START 0x0400 /* Start output */ +#define RR_RX_START 0x0800 /* Start input */ + +#define RR_TX_BREAK 0x1000 /* Send BREAK */ +#define RR_TX_ICHAR 0x2000 /* Send character immediate */ + + +/************************************************************************ + * Channel information structure. struct ch_struct + ************************************************************************/ + +struct ch_struct { + struct digi_struct ch_digi; /* Digi variables */ + int ch_edelay; /* Digi edelay */ + + struct tty_port port; + struct un_struct ch_tun; /* Terminal unit info */ + struct un_struct ch_pun; /* Printer unit info */ + + struct nd_struct *ch_nd; /* Node pointer */ + u8 *ch_tbuf; /* Local Transmit Buffer */ + u8 *ch_rbuf; /* Local Receive Buffer */ + ulong ch_cpstime; /* Printer CPS time */ + ulong ch_waketime; /* Printer wake time */ + + ulong ch_flag; /* CH_* flags */ + + enum dgrp_ch_state_t ch_state; /* CS_* Protocol state */ + ushort ch_send; /* Bit vector of RR_* requests */ + ushort ch_expect; /* Bit vector of RR_* responses */ + ushort ch_wait_carrier; /* Thread count waiting for carrier */ + ushort ch_wait_count[3]; /* Thread count waiting by otype */ + + ushort ch_portnum; /* Port number */ + ushort ch_open_count; /* Successful open count */ + ushort ch_category; /* Device category */ + ushort ch_open_error; /* Last open error number */ + ushort ch_break_time; /* Pending break request time */ + ushort ch_cpsrem; /* Printer CPS remainder */ + ushort ch_ocook; /* Realport fastcook oflags */ + ushort ch_inwait; /* Thread count in CLIST input */ + + ushort ch_tin; /* Local transmit buffer in ptr */ + ushort ch_tout; /* Local transmit buffer out ptr */ + ushort ch_s_tin; /* Realport TIN */ + ushort ch_s_tpos; /* Realport TPOS */ + ushort ch_s_tsize; /* Realport TSIZE */ + ushort ch_s_treq; /* Realport TREQ */ + ushort ch_s_elast; /* Realport ELAST */ + + ushort ch_rin; /* Local receive buffer in ptr */ + ushort ch_rout; /* Local receive buffer out ptr */ + ushort ch_s_rin; /* Realport RIN */ + /* David Fries 7-13-2001, ch_s_rin should be renamed ch_s_rout because + * the variable we want to represent is the PortServer's ROUT, which is + * the sequence number for the next byte the PortServer will send us. + * RIN is the sequence number for the next byte the PortServer will + * receive from the uart. The port server will send data as long as + * ROUT is less than RWIN. What would happen is the port is opened, it + * receives data, it gives the value of RIN, we set the RWIN to + * RIN+RBUF_MAX-1, it sends us RWIN-ROUT bytes which overflows. ROUT + * is set to zero when the port is opened, so we start at zero and + * count up as data is received. + */ + ushort ch_s_rwin; /* Realport RWIN */ + ushort ch_s_rsize; /* Realport RSIZE */ + + ushort ch_tmax; /* Local TMAX */ + ushort ch_ttime; /* Local TTIME */ + ushort ch_rmax; /* Local RMAX */ + ushort ch_rtime; /* Local RTIME */ + ushort ch_rlow; /* Local RLOW */ + ushort ch_rhigh; /* Local RHIGH */ + + ushort ch_s_tmax; /* Realport TMAX */ + ushort ch_s_ttime; /* Realport TTIME */ + ushort ch_s_rmax; /* Realport RMAX */ + ushort ch_s_rtime; /* Realport RTIME */ + ushort ch_s_rlow; /* Realport RLOW */ + ushort ch_s_rhigh; /* Realport RHIGH */ + + ushort ch_brate; /* Local baud rate */ + ushort ch_cflag; /* Local tty cflags */ + ushort ch_iflag; /* Local tty iflags */ + ushort ch_oflag; /* Local tty oflags */ + ushort ch_xflag; /* Local tty xflags */ + + ushort ch_s_brate; /* Realport BRATE */ + ushort ch_s_cflag; /* Realport CFLAG */ + ushort ch_s_iflag; /* Realport IFLAG */ + ushort ch_s_oflag; /* Realport OFLAG */ + ushort ch_s_xflag; /* Realport XFLAG */ + + u8 ch_otype; /* Open request type */ + u8 ch_pscan_savechar; /* Last character read by parity scan */ + u8 ch_pscan_state; /* PScan State based on last 2 chars */ + u8 ch_otype_waiting; /* Type of open pending in server */ + u8 ch_flush_seq; /* Receive flush end sequence */ + u8 ch_s_mlast; /* Realport MLAST */ + + u8 ch_mout; /* Local MOUT */ + u8 ch_mflow; /* Local MFLOW */ + u8 ch_mctrl; /* Local MCTRL */ + u8 ch_xon; /* Local XON */ + u8 ch_xoff; /* Local XOFF */ + u8 ch_lnext; /* Local LNEXT */ + u8 ch_xxon; /* Local XXON */ + u8 ch_xxoff; /* Local XXOFF */ + + u8 ch_s_mout; /* Realport MOUT */ + u8 ch_s_mflow; /* Realport MFLOW */ + u8 ch_s_mctrl; /* Realport MCTRL */ + u8 ch_s_xon; /* Realport XON */ + u8 ch_s_xoff; /* Realport XOFF */ + u8 ch_s_lnext; /* Realport LNEXT */ + u8 ch_s_xxon; /* Realport XXON */ + u8 ch_s_xxoff; /* Realport XXOFF */ + + wait_queue_head_t ch_flag_wait; /* Wait queue for ch_flag changes */ + wait_queue_head_t ch_sleep; /* Wait queue for my_sleep() */ + + int ch_custom_speed; /* Realport custom speed */ + int ch_txcount; /* Running TX count */ + int ch_rxcount; /* Running RX count */ +}; + + +/************************************************************************ + * Node State definitions. + ************************************************************************/ + +enum dgrp_nd_state_t { + NS_CLOSED = 0, /* Network device is closed */ + NS_IDLE = 1, /* Network connection inactive */ + NS_SEND_QUERY = 2, /* Send server query */ + NS_WAIT_QUERY = 3, /* Wait for query response */ + NS_READY = 4, /* Network ready */ + NS_SEND_ERROR = 5 /* Must send error hangup */ +}; + +#define ND_STATE_STR(x) \ + ((x) == NS_CLOSED ? "CLOSED" : \ + ((x) == NS_IDLE ? "IDLE" : \ + ((x) == NS_SEND_QUERY ? "SEND_QUERY" : \ + ((x) == NS_WAIT_QUERY ? "WAIT_QUERY" : \ + ((x) == NS_READY ? "READY" : \ + ((x) == NS_SEND_ERROR ? "SEND_ERROR" : "UNKNOWN")))))) + +/************************************************************************ + * Node Flag definitions. + ************************************************************************/ + +#define ND_SELECT 0x0001 /* Multiple net read selects */ +#define ND_DEB_WAIT 0x0002 /* Debug Device waiting */ + + +/************************************************************************ + * Monitoring flag definitions. + ************************************************************************/ + +#define MON_WAIT_DATA 0x0001 /* Waiting for buffer data */ +#define MON_WAIT_SPACE 0x0002 /* Waiting for buffer space */ + +/************************************************************************ + * DPA flag definitions. + ************************************************************************/ + +#define DPA_WAIT_DATA 0x0001 /* Waiting for buffer data */ +#define DPA_WAIT_SPACE 0x0002 /* Waiting for buffer space */ + + +/************************************************************************ + * Definitions taken from Realport Dump. + ************************************************************************/ + +#define RPDUMP_MAGIC "Digi-RealPort-1.0" + +#define RPDUMP_MESSAGE 0xE2 /* Descriptive message */ +#define RPDUMP_RESET 0xE7 /* Connection reset */ +#define RPDUMP_CLIENT 0xE8 /* Client data */ +#define RPDUMP_SERVER 0xE9 /* Server data */ + + +/************************************************************************ + * Node request/response definitions. + ************************************************************************/ + +#define NR_ECHO 0x0001 /* Server echo packet */ +#define NR_IDENT 0x0002 /* Server Product ID */ +#define NR_CAPABILITY 0x0004 /* Server Capabilties */ +#define NR_VPD 0x0008 /* Server VPD, if any */ +#define NR_PASSWORD 0x0010 /* Server Password */ + +/************************************************************************ + * Registration status of the node's Linux struct tty_driver structures. + ************************************************************************/ +#define SERIAL_TTDRV_REG 0x0001 /* nd_serial_ttdriver registered */ +#define CALLOUT_TTDRV_REG 0x0002 /* nd_callout_ttdriver registered */ +#define XPRINT_TTDRV_REG 0x0004 /* nd_xprint_ttdriver registered */ + + +/************************************************************************ + * Node structure. There exists one of these for each associated + * realport server. + ************************************************************************/ + +struct nd_struct { + struct list_head list; + long nd_major; /* Node's major number */ + long nd_ID; /* Node's ID code */ + + char nd_serial_name[50]; /* "tty_dgrp__" + null */ + char nd_callout_name[50]; /* "cu_dgrp__" + null */ + char nd_xprint_name[50]; /* "pr_dgrp__" + null */ + + char password[16]; /* Password for server, if needed */ + int nd_tty_ref_cnt; /* Linux tty reference count */ + + struct proc_dir_entry *nd_net_de; /* Dir entry for /proc/dgrp/net */ + struct proc_dir_entry *nd_mon_de; /* Dir entry for /proc/dgrp/mon */ + struct proc_dir_entry *nd_ports_de; /* Dir entry for /proc/dgrp/ports*/ + struct proc_dir_entry *nd_dpa_de; /* Dir entry for /proc/dgrp/dpa */ + + spinlock_t nd_lock; /* General node lock */ + + struct semaphore nd_net_semaphore; /* Net read/write lock */ + struct semaphore nd_mon_semaphore; /* Monitor buffer lock */ + spinlock_t nd_dpa_lock; /* DPA buffer lock */ + + enum dgrp_nd_state_t nd_state; /* NS_* network state */ + int nd_chan_count; /* # active channels */ + int nd_flag; /* Node flags */ + int nd_send; /* Responses to send */ + int nd_expect; /* Responses we expect */ + + u8 *nd_iobuf; /* Network R/W Buffer */ + wait_queue_head_t nd_tx_waitq; /* Network select wait queue */ + + u8 *nd_inputbuf; /* Input Buffer */ + u8 *nd_inputflagbuf; /* Input Flags Buffer */ + + int nd_tx_deposit; /* Accumulated transmit deposits */ + int nd_tx_charge; /* Accumulated transmit charges */ + int nd_tx_credit; /* Current TX credit */ + int nd_tx_ready; /* Ready to transmit */ + int nd_tx_work; /* TX work waiting */ + ulong nd_tx_time; /* Last transmit time */ + ulong nd_poll_time; /* Next scheduled poll time */ + + int nd_delay; /* Current TX delay */ + int nd_rate; /* Current TX rate */ + struct link_struct nd_link; /* Link speed params. */ + + int nd_seq_in; /* TX seq in ptr */ + int nd_seq_out; /* TX seq out ptr */ + int nd_unack; /* Unacknowledged byte count */ + int nd_remain; /* Remaining receive bytes */ + int nd_tx_module; /* Current TX module # */ + int nd_rx_module; /* Current RX module # */ + char *nd_error; /* Protocol error message */ + + int nd_write_count; /* drp_write() call count */ + int nd_read_count; /* drp_read() count */ + int nd_send_count; /* TCP message sent */ + int nd_tx_byte; /* Transmit byte count */ + int nd_rx_byte; /* Receive byte count */ + + ulong nd_mon_lbolt; /* Monitor start time */ + int nd_mon_flag; /* Monitor flags */ + int nd_mon_in; /* Monitor in pointer */ + int nd_mon_out; /* Monitor out pointer */ + wait_queue_head_t nd_mon_wqueue; /* Monitor wait queue (on flags) */ + u8 *nd_mon_buf; /* Monitor buffer */ + + ulong nd_dpa_lbolt; /* DPA start time */ + int nd_dpa_flag; /* DPA flags */ + int nd_dpa_in; /* DPA in pointer */ + int nd_dpa_out; /* DPA out pointer */ + wait_queue_head_t nd_dpa_wqueue; /* DPA wait queue (on flags) */ + u8 *nd_dpa_buf; /* DPA buffer */ + + uint nd_dpa_debug; + uint nd_dpa_port; + + wait_queue_head_t nd_seq_wque[SEQ_MAX]; /* TX thread wait queues */ + u8 nd_seq_wait[SEQ_MAX]; /* Transmit thread wait count */ + + ushort nd_seq_size[SEQ_MAX]; /* Transmit seq packet size */ + ulong nd_seq_time[SEQ_MAX]; /* Transmit seq packet time */ + + ushort nd_hw_ver; /* HW version returned from PS */ + ushort nd_sw_ver; /* SW version returned from PS */ + uint nd_hw_id; /* HW ID returned from PS */ + u8 nd_ps_desc[MAX_DESC_LEN+1]; /* Description from PS */ + uint nd_vpd_len; /* VPD len, if any */ + u8 nd_vpd[VPDSIZE]; /* VPD, if any */ + + ulong nd_ttdriver_flags; /* Registration status */ + struct tty_driver *nd_serial_ttdriver; /* Linux TTYDRIVER structure */ + struct tty_driver *nd_callout_ttdriver; /* Linux TTYDRIVER structure */ + struct tty_driver *nd_xprint_ttdriver; /* Linux TTYDRIVER structure */ + + u8 *nd_writebuf; /* Used to cache data read + * from user + */ + struct ch_struct nd_chan[CHAN_MAX]; /* Channel array */ + struct device *nd_class_dev; /* Hang our sysfs stuff off of here */ +}; + +#endif /* __DRP_H */ From 7b6d45c211a401a9bdeebfa96f8a4c811bd3eeaf Mon Sep 17 00:00:00 2001 From: Bill Pemberton Date: Thu, 20 Sep 2012 16:55:28 -0400 Subject: [PATCH 205/235] staging: dgrp: add dgrp to the build Kconfig and Makefile changes to add dgrp to the build system. Signed-off-by: Bill Pemberton Signed-off-by: Greg Kroah-Hartman --- drivers/staging/Kconfig | 2 ++ drivers/staging/Makefile | 1 + drivers/staging/dgrp/TODO | 12 +++++++++--- 3 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig index e3402d5644d..21114512fcb 100644 --- a/drivers/staging/Kconfig +++ b/drivers/staging/Kconfig @@ -136,4 +136,6 @@ source "drivers/staging/csr/Kconfig" source "drivers/staging/omap-thermal/Kconfig" +source "drivers/staging/dgrp/Kconfig" + endif # STAGING diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile index 3be59d02cae..17c43c4caca 100644 --- a/drivers/staging/Makefile +++ b/drivers/staging/Makefile @@ -60,3 +60,4 @@ obj-$(CONFIG_USB_G_CCG) += ccg/ obj-$(CONFIG_WIMAX_GDM72XX) += gdm72xx/ obj-$(CONFIG_CSR_WIFI) += csr/ obj-$(CONFIG_OMAP_BANDGAP) += omap-thermal/ +obj-$(CONFIG_DGRP) += dgrp/ diff --git a/drivers/staging/dgrp/TODO b/drivers/staging/dgrp/TODO index 63341ade90d..3ef2611bc6d 100644 --- a/drivers/staging/dgrp/TODO +++ b/drivers/staging/dgrp/TODO @@ -1,7 +1,13 @@ - Use configfs for config stuff. This will require changes to the user space code. -- Check the calls to tty_register_device. In particular, check to see - if there should be some handling for IS_ERR(classp). - - dgrp_send() and dgrp_receive() could use some refactoring + +- Don't automatically create CHAN_MAX (64) channel array entries for + every device as many devices are going to have much less than 64 + channels. + +- The locking needs to be checked. It seems haphazardly done in most + places. + +- Check Kconfig dependencies From 84c3b84860440a9e3a3666c14112f41311b8f623 Mon Sep 17 00:00:00 2001 From: Jaeden Amero Date: Wed, 19 Sep 2012 15:34:31 +0100 Subject: [PATCH 206/235] compat_ioctl: Add RS-485 IOCTLs to the list The RS-485 TIOCSRS485 and TIOCGRS485 ioctls are 32-bit compatible, so in order to call them on 64-bit systems from 32-bit user mode, we add them to the ioctl pointer list as compatible ioctls. Signed-off-by: Jaeden Amero Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- fs/compat_ioctl.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index debdfe0fc80..85dfebfe682 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -866,6 +866,8 @@ COMPATIBLE_IOCTL(TIOCGPTN) COMPATIBLE_IOCTL(TIOCSPTLCK) COMPATIBLE_IOCTL(TIOCSERGETLSR) COMPATIBLE_IOCTL(TIOCSIG) +COMPATIBLE_IOCTL(TIOCSRS485) +COMPATIBLE_IOCTL(TIOCGRS485) #ifdef TCGETS2 COMPATIBLE_IOCTL(TCGETS2) COMPATIBLE_IOCTL(TCSETS2) From 43eca0aef73cc6f0d37ad139f1cbb810e62e409d Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 19 Sep 2012 15:35:46 +0100 Subject: [PATCH 207/235] serial_core: Fix race in uart_handle_dcd_change If a serial driver is called post hangup with a second DCD event then we will attempt to get the ldisc of NULL. Check we have a tty before trying to do anything with it. This is still only safe within the uart layer if the caller holds the relevant uart locks. We could do with a version where the tty is passed for more general use. Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 046279ce3e8..78036c510cc 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2501,9 +2501,12 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) { struct uart_state *state = uport->state; struct tty_port *port = &state->port; - struct tty_ldisc *ld = tty_ldisc_ref(port->tty); + struct tty_ldisc *ld = NULL; struct pps_event_time ts; + struct tty_struct *tty = port->tty; + if (tty) + ld = tty_ldisc_ref(tty); if (ld && ld->ops->dcd_change) pps_get_ts(&ts); @@ -2516,12 +2519,12 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) if (port->flags & ASYNC_CHECK_CD) { if (status) wake_up_interruptible(&port->open_wait); - else if (port->tty) - tty_hangup(port->tty); + else if (tty) + tty_hangup(tty); } if (ld && ld->ops->dcd_change) - ld->ops->dcd_change(port->tty, status, &ts); + ld->ops->dcd_change(tty, status, &ts); if (ld) tty_ldisc_deref(ld); } From 05fb79e45ee28b97a7cb74bd5ea3a88a8d13db1c Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Wed, 19 Sep 2012 15:34:47 +0100 Subject: [PATCH 208/235] pty: Fix locking bug on error path We end up dropping the mutex twice on some errors. We don't want to do that. Reported-by: Fengguang Wu Signed-off-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/pty.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 2bace847eb3..a82b39939a9 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -628,6 +628,7 @@ static int ptmx_open(struct inode *inode, struct file *filp) index = devpts_new_index(inode); if (index < 0) { retval = index; + mutex_unlock(&devpts_mutex); goto err_file; } @@ -667,7 +668,6 @@ out: mutex_unlock(&tty_mutex); devpts_kill_index(inode, index); err_file: - mutex_unlock(&devpts_mutex); tty_free_file(filp); return retval; } From bd21f551c365e50a241b4cee4bc8be72914ff236 Mon Sep 17 00:00:00 2001 From: Flavio Leitner Date: Tue, 18 Sep 2012 16:21:32 -0300 Subject: [PATCH 209/235] 8250: fix autoconfig to work with serial console The autoconfig prints messages while holding the port's spinlock and that causes a deadlock when using serial console. Signed-off-by: Flavio Leitner Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index d4e0b07cb13..932a216aa5b 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -1037,6 +1037,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) unsigned char save_lcr, save_mcr; struct uart_port *port = &up->port; unsigned long flags; + unsigned int old_capabilities; if (!port->iobase && !port->mapbase && !port->membase) return; @@ -1087,6 +1088,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) /* * We failed; there's nothing here */ + spin_unlock_irqrestore(&port->lock, flags); DEBUG_AUTOCONF("IER test failed (%02x, %02x) ", scratch2, scratch3); goto out; @@ -1110,6 +1112,7 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) status1 = serial_in(up, UART_MSR) & 0xF0; serial_out(up, UART_MCR, save_mcr); if (status1 != 0x90) { + spin_unlock_irqrestore(&port->lock, flags); DEBUG_AUTOCONF("LOOP test failed (%02x) ", status1); goto out; @@ -1132,8 +1135,6 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); scratch = serial_in(up, UART_IIR) >> 6; - DEBUG_AUTOCONF("iir=%d ", scratch); - switch (scratch) { case 0: autoconfig_8250(up); @@ -1167,19 +1168,13 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) serial_out(up, UART_LCR, save_lcr); - if (up->capabilities != uart_config[port->type].flags) { - printk(KERN_WARNING - "ttyS%d: detected caps %08x should be %08x\n", - serial_index(port), up->capabilities, - uart_config[port->type].flags); - } - port->fifosize = uart_config[up->port.type].fifo_size; + old_capabilities = up->capabilities; up->capabilities = uart_config[port->type].flags; up->tx_loadsz = uart_config[port->type].tx_loadsz; if (port->type == PORT_UNKNOWN) - goto out; + goto out_lock; /* * Reset the UART. @@ -1196,8 +1191,16 @@ static void autoconfig(struct uart_8250_port *up, unsigned int probeflags) else serial_out(up, UART_IER, 0); - out: +out_lock: spin_unlock_irqrestore(&port->lock, flags); + if (up->capabilities != old_capabilities) { + printk(KERN_WARNING + "ttyS%d: detected caps %08x should be %08x\n", + serial_index(port), old_capabilities, + up->capabilities); + } +out: + DEBUG_AUTOCONF("iir=%d ", scratch); DEBUG_AUTOCONF("type=%s\n", uart_config[port->type].name); } From 0a86a86b92312dacf74008ea1e1f4df20362f9f4 Mon Sep 17 00:00:00 2001 From: Richard Zhao Date: Tue, 18 Sep 2012 16:14:58 +0800 Subject: [PATCH 210/235] serial: imx: set sport as drvdata, like it's used elsewhere Signed-off-by: Richard Zhao Acked-by: Shawn Guo Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 5952b25c288..49f664f7287 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1540,7 +1540,7 @@ static int serial_imx_probe(struct platform_device *pdev) ret = uart_add_one_port(&imx_reg, &sport->port); if (ret) goto deinit; - platform_set_drvdata(pdev, &sport->port); + platform_set_drvdata(pdev, sport); return 0; deinit: From 034dc4db6fefa8b9b55a20e816a05f132fdd56bc Mon Sep 17 00:00:00 2001 From: Richard Zhao Date: Tue, 18 Sep 2012 16:14:59 +0800 Subject: [PATCH 211/235] serial: imx: remove null check of sport in suspend/resume function platform_get_drvdata always retrun a valid value after probe succeed. It also fixed smatch warnings: drivers/tty/serial/imx.c:1376 serial_imx_suspend() warn: variable dereferenced before check 'sport' (see line 1372) drivers/tty/serial/imx.c:1392 serial_imx_resume() warn: variable dereferenced before check 'sport' (see line 1388) Signed-off-by: Richard Zhao Acked-by: Shawn Guo Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index 49f664f7287..efeb8becfa4 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -1373,8 +1373,7 @@ static int serial_imx_suspend(struct platform_device *dev, pm_message_t state) val |= UCR3_AWAKEN; writel(val, sport->port.membase + UCR3); - if (sport) - uart_suspend_port(&imx_reg, &sport->port); + uart_suspend_port(&imx_reg, &sport->port); return 0; } @@ -1389,8 +1388,7 @@ static int serial_imx_resume(struct platform_device *dev) val &= ~UCR3_AWAKEN; writel(val, sport->port.membase + UCR3); - if (sport) - uart_resume_port(&imx_reg, &sport->port); + uart_resume_port(&imx_reg, &sport->port); return 0; } From ac57e7f38ea6fe7358cd0b7a2f2d21aef5ab70cd Mon Sep 17 00:00:00 2001 From: Sourav Poddar Date: Tue, 18 Sep 2012 17:05:54 +0530 Subject: [PATCH 212/235] serial: omap: Remove unnecessary checks from suspend/resume Drop the check for "up" being valid on suspend/resume callbacks. It should be valid always. Get rid of the "pdata" check also as serial_omap_get_context_loss_count() checks for it. Tested on omap4 panda and 3630 based Beagle board. Signed-off-by: Sourav Poddar Reviewed-by: Felipe Balbi Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 23 +++++++++-------------- 1 file changed, 9 insertions(+), 14 deletions(-) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index f175385bb30..3c05c5ecdfb 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -1222,10 +1222,8 @@ static int serial_omap_suspend(struct device *dev) { struct uart_omap_port *up = dev_get_drvdata(dev); - if (up) { - uart_suspend_port(&serial_omap_reg, &up->port); - flush_work_sync(&up->qos_work); - } + uart_suspend_port(&serial_omap_reg, &up->port); + flush_work_sync(&up->qos_work); return 0; } @@ -1234,8 +1232,8 @@ static int serial_omap_resume(struct device *dev) { struct uart_omap_port *up = dev_get_drvdata(dev); - if (up) - uart_resume_port(&serial_omap_reg, &up->port); + uart_resume_port(&serial_omap_reg, &up->port); + return 0; } #endif @@ -1553,17 +1551,14 @@ static int serial_omap_runtime_suspend(struct device *dev) static int serial_omap_runtime_resume(struct device *dev) { struct uart_omap_port *up = dev_get_drvdata(dev); - struct omap_uart_port_info *pdata = dev->platform_data; - if (up && pdata) { - u32 loss_cnt = serial_omap_get_context_loss_count(up); + u32 loss_cnt = serial_omap_get_context_loss_count(up); - if (up->context_loss_cnt != loss_cnt) - serial_omap_restore_context(up); + if (up->context_loss_cnt != loss_cnt) + serial_omap_restore_context(up); - up->latency = up->calc_latency; - schedule_work(&up->qos_work); - } + up->latency = up->calc_latency; + schedule_work(&up->qos_work); return 0; } From 142e5460a66edbfe881474eb422e86ff61c4bfc7 Mon Sep 17 00:00:00 2001 From: Jaeden Amero Date: Mon, 24 Sep 2012 10:39:45 -0500 Subject: [PATCH 213/235] compat_ioctl: Avoid using undefined RS-485 IOCTLs Wrap the use of TIOCSRS485 and TIOCGRS485 in #ifdef so that we avoid adding undefined IOCTLs to the ioctl pointer list as compatible ioctls. This change was motivated by a build error on a MIPS build. tree: git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-next head: ac57e7f38ea6fe7358cd0b7a2f2d21aef5ab70cd commit: 84c3b84860440a9e3a3666c14112f41311b8f623 [10/16] compat_ioctl: Add RS-485 IOCTLs to the list config: mips-fuloong2e_defconfig All related error/warning messages: fs/compat_ioctl.c:869:1: error: 'TIOCSRS485' undeclared here (not in a function) fs/compat_ioctl.c:870:1: error: 'TIOCGRS485' undeclared here (not in a function) vim +869 fs/compat_ioctl.c 863 COMPATIBLE_IOCTL(TIOCSPGRP) 864 COMPATIBLE_IOCTL(TIOCGPGRP) 865 COMPATIBLE_IOCTL(TIOCGPTN) 866 COMPATIBLE_IOCTL(TIOCSPTLCK) 867 COMPATIBLE_IOCTL(TIOCSERGETLSR) 868 COMPATIBLE_IOCTL(TIOCSIG) > 869 COMPATIBLE_IOCTL(TIOCSRS485) 870 COMPATIBLE_IOCTL(TIOCGRS485) 871 #ifdef TCGETS2 872 COMPATIBLE_IOCTL(TCGETS2) Reported-by: Fengguang Wu Reported-by: Stephen Rothwell Signed-off-by: Jaeden Amero Signed-off-by: Greg Kroah-Hartman --- fs/compat_ioctl.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c index 85dfebfe682..59f8db4a39a 100644 --- a/fs/compat_ioctl.c +++ b/fs/compat_ioctl.c @@ -866,8 +866,12 @@ COMPATIBLE_IOCTL(TIOCGPTN) COMPATIBLE_IOCTL(TIOCSPTLCK) COMPATIBLE_IOCTL(TIOCSERGETLSR) COMPATIBLE_IOCTL(TIOCSIG) +#ifdef TIOCSRS485 COMPATIBLE_IOCTL(TIOCSRS485) +#endif +#ifdef TIOCGRS485 COMPATIBLE_IOCTL(TIOCGRS485) +#endif #ifdef TCGETS2 COMPATIBLE_IOCTL(TCGETS2) COMPATIBLE_IOCTL(TCSETS2) From ad0c6e367ee0d08c4caa19ad0dbd3d752bd39de0 Mon Sep 17 00:00:00 2001 From: Bill Pemberton Date: Mon, 24 Sep 2012 17:02:08 -0400 Subject: [PATCH 214/235] staging: dgrp: fix potential call to strncpy with a negative number In dgrp_receive() there is: desclen = ((plen - 12) > MAX_DESC_LEN) ? MAX_DESC_LEN : plen - 12; strncpy(nd->nd_ps_desc, b + 12, desclen); However, it's possible for plen to be <= 12 here so we'd be passing a negative number into the strncpy(). Fix this to not make the strncpy call and report an error if desclen is <= 0 Reported-by: Dan Carpenter Signed-off-by: Bill Pemberton Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dgrp/dgrp_net_ops.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/staging/dgrp/dgrp_net_ops.c b/drivers/staging/dgrp/dgrp_net_ops.c index d9d6b6709e4..ab839ea3b44 100644 --- a/drivers/staging/dgrp/dgrp_net_ops.c +++ b/drivers/staging/dgrp/dgrp_net_ops.c @@ -3156,6 +3156,12 @@ check_query: nd->nd_hw_id = b[6]; desclen = ((plen - 12) > MAX_DESC_LEN) ? MAX_DESC_LEN : plen - 12; + + if (desclen <= 0) { + error = "Response Packet desclen error"; + goto prot_error; + } + strncpy(nd->nd_ps_desc, b + 12, desclen); nd->nd_ps_desc[desclen] = 0; } From 4dac2116547b4aab7ac327edb344bb68ed1e8839 Mon Sep 17 00:00:00 2001 From: Stephen Rothwell Date: Tue, 25 Sep 2012 00:29:20 +1000 Subject: [PATCH 215/235] staging: dgrp: using vmalloc needs to include vmalloc.h Signed-off-by: Stephen Rothwell Signed-off-by: Greg Kroah-Hartman --- drivers/staging/dgrp/dgrp_specproc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/staging/dgrp/dgrp_specproc.c b/drivers/staging/dgrp/dgrp_specproc.c index 259d23aa6c2..28f5c9ab6b4 100644 --- a/drivers/staging/dgrp/dgrp_specproc.c +++ b/drivers/staging/dgrp/dgrp_specproc.c @@ -39,6 +39,7 @@ #include #include #include +#include #include "dgrp_common.h" From 835d844d1a28efba81d5aca7385e24c29d3a6db2 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Fri, 7 Sep 2012 19:06:23 +0100 Subject: [PATCH 216/235] 8250_pnp: do pnp probe before legacy probe We first probe the legacy serial ports and then check pnp. If there is a non-standard configuration then this might not work, also this change is needed so we can blacklist Winbond CIR based on PNP ID. For this to work the 8250_pnp driver must be merged into the 8250 module. Signed-off-by: Sean Young Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 31 +++++++++++++++++------------- drivers/tty/serial/8250/8250.h | 9 +++++++++ drivers/tty/serial/8250/8250_pnp.c | 11 +++-------- drivers/tty/serial/8250/Kconfig | 16 +++++++-------- drivers/tty/serial/8250/Makefile | 5 +++-- 5 files changed, 41 insertions(+), 31 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index 932a216aa5b..a2042c6673a 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -2675,6 +2675,9 @@ static void __init serial8250_isa_init_ports(void) return; first = 0; + if (nr_uarts > UART_NR) + nr_uarts = UART_NR; + for (i = 0; i < nr_uarts; i++) { struct uart_8250_port *up = &serial8250_ports[i]; struct uart_port *port = &up->port; @@ -2684,6 +2687,7 @@ static void __init serial8250_isa_init_ports(void) init_timer(&up->timer); up->timer.function = serial8250_timeout; + up->cur_iotype = 0xFF; /* * ALPHA_KLUDGE_MCR needs to be killed. @@ -2735,13 +2739,9 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev) for (i = 0; i < nr_uarts; i++) { struct uart_8250_port *up = &serial8250_ports[i]; - up->cur_iotype = 0xFF; - } - serial8250_isa_init_ports(); - - for (i = 0; i < nr_uarts; i++) { - struct uart_8250_port *up = &serial8250_ports[i]; + if (up->port.dev) + continue; up->port.dev = dev; @@ -2866,9 +2866,6 @@ static struct console serial8250_console = { static int __init serial8250_console_init(void) { - if (nr_uarts > UART_NR) - nr_uarts = UART_NR; - serial8250_isa_init_ports(); register_console(&serial8250_console); return 0; @@ -3151,7 +3148,8 @@ int serial8250_register_8250_port(struct uart_8250_port *up) uart = serial8250_find_match_or_unused(&up->port); if (uart) { - uart_remove_one_port(&serial8250_reg, &uart->port); + if (uart->port.dev) + uart_remove_one_port(&serial8250_reg, &uart->port); uart->port.iobase = up->port.iobase; uart->port.membase = up->port.membase; @@ -3235,8 +3233,7 @@ static int __init serial8250_init(void) { int ret; - if (nr_uarts > UART_NR) - nr_uarts = UART_NR; + serial8250_isa_init_ports(); printk(KERN_INFO "Serial: 8250/16550 driver, " "%d ports, IRQ sharing %sabled\n", nr_uarts, @@ -3251,11 +3248,15 @@ static int __init serial8250_init(void) if (ret) goto out; + ret = serial8250_pnp_init(); + if (ret) + goto unreg_uart_drv; + serial8250_isa_devs = platform_device_alloc("serial8250", PLAT8250_DEV_LEGACY); if (!serial8250_isa_devs) { ret = -ENOMEM; - goto unreg_uart_drv; + goto unreg_pnp; } ret = platform_device_add(serial8250_isa_devs); @@ -3271,6 +3272,8 @@ static int __init serial8250_init(void) platform_device_del(serial8250_isa_devs); put_dev: platform_device_put(serial8250_isa_devs); +unreg_pnp: + serial8250_pnp_exit(); unreg_uart_drv: #ifdef CONFIG_SPARC sunserial_unregister_minors(&serial8250_reg, UART_NR); @@ -3295,6 +3298,8 @@ static void __exit serial8250_exit(void) platform_driver_unregister(&serial8250_isa_driver); platform_device_unregister(isa_dev); + serial8250_pnp_exit(); + #ifdef CONFIG_SPARC sunserial_unregister_minors(&serial8250_reg, UART_NR); #else diff --git a/drivers/tty/serial/8250/8250.h b/drivers/tty/serial/8250/8250.h index 0c5e908df0b..5a76f9c8d36 100644 --- a/drivers/tty/serial/8250/8250.h +++ b/drivers/tty/serial/8250/8250.h @@ -97,3 +97,12 @@ static inline void serial_dl_write(struct uart_8250_port *up, int value) #else #define ALPHA_KLUDGE_MCR 0 #endif + +#ifdef CONFIG_SERIAL_8250_PNP +int serial8250_pnp_init(void); +void serial8250_pnp_exit(void); +#else +static inline int serial8250_pnp_init(void) { return 0; } +static inline void serial8250_pnp_exit(void) { } +#endif + diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index fde5aa60d51..28bf830603a 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -1,5 +1,5 @@ /* - * Probe module for 8250/16550-type ISAPNP serial ports. + * Probe for 8250/16550-type ISAPNP serial ports. * * Based on drivers/char/serial.c, by Linus Torvalds, Theodore Ts'o. * @@ -507,18 +507,13 @@ static struct pnp_driver serial_pnp_driver = { .id_table = pnp_dev_table, }; -static int __init serial8250_pnp_init(void) +int serial8250_pnp_init(void) { return pnp_register_driver(&serial_pnp_driver); } -static void __exit serial8250_pnp_exit(void) +void serial8250_pnp_exit(void) { pnp_unregister_driver(&serial_pnp_driver); } -module_init(serial8250_pnp_init); -module_exit(serial8250_pnp_exit); - -MODULE_LICENSE("GPL"); -MODULE_DESCRIPTION("Generic 8250/16x50 PnP serial driver"); diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig index a27dd0569bd..f3d283f2e3a 100644 --- a/drivers/tty/serial/8250/Kconfig +++ b/drivers/tty/serial/8250/Kconfig @@ -33,6 +33,14 @@ config SERIAL_8250 Most people will say Y or M here, so that they can use serial mice, modems and similar devices connecting to the standard serial ports. +config SERIAL_8250_PNP + bool "8250/16550 PNP device support" if EXPERT + depends on SERIAL_8250 && PNP + default y + ---help--- + This builds standard PNP serial support. You may be able to + disable this feature if you only need legacy serial support. + config SERIAL_8250_CONSOLE bool "Console on 8250/16550 and compatible serial port" depends on SERIAL_8250=y @@ -85,14 +93,6 @@ config SERIAL_8250_PCI disable this feature if you only need legacy serial support. Saves about 9K. -config SERIAL_8250_PNP - tristate "8250/16550 PNP device support" if EXPERT - depends on SERIAL_8250 && PNP - default SERIAL_8250 - help - This builds standard PNP serial support. You may be able to - disable this feature if you only need legacy serial support. - config SERIAL_8250_HP300 tristate depends on SERIAL_8250 && HP300 diff --git a/drivers/tty/serial/8250/Makefile b/drivers/tty/serial/8250/Makefile index d7533c7d2c1..108fe7fe13e 100644 --- a/drivers/tty/serial/8250/Makefile +++ b/drivers/tty/serial/8250/Makefile @@ -2,8 +2,9 @@ # Makefile for the 8250 serial device drivers. # -obj-$(CONFIG_SERIAL_8250) += 8250.o -obj-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o +obj-$(CONFIG_SERIAL_8250) += 8250_core.o +8250_core-y := 8250.o +8250_core-$(CONFIG_SERIAL_8250_PNP) += 8250_pnp.o obj-$(CONFIG_SERIAL_8250_GSC) += 8250_gsc.o obj-$(CONFIG_SERIAL_8250_PCI) += 8250_pci.o obj-$(CONFIG_SERIAL_8250_HP300) += 8250_hp300.o From 65ecc9c02dbad033a73a32916d17c107c5b25031 Mon Sep 17 00:00:00 2001 From: Sean Young Date: Fri, 7 Sep 2012 19:06:24 +0100 Subject: [PATCH 217/235] 8250: blacklist Winbond CIR port The legacy serial driver will detect the Winbond CIR device as a serial port, since it looks exactly like a serial port unless you know what it is from the PNP ID. Here we track this port as a special PORT_8250_CIR type, preventing the legacy serial driver from probing it. Signed-off-by: Sean Young Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250.c | 16 ++++++++++++++-- drivers/tty/serial/8250/8250_pnp.c | 20 +++++++++++++++----- include/linux/serial_core.h | 3 ++- 3 files changed, 31 insertions(+), 8 deletions(-) diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index a2042c6673a..3ba4234592b 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -290,6 +290,9 @@ static const struct serial8250_config uart_config[] = { UART_FCR_R_TRIG_00 | UART_FCR_T_TRIG_00, .flags = UART_CAP_FIFO, }, + [PORT_8250_CIR] = { + .name = "CIR port" + } }; /* Uart divisor latch read */ @@ -1900,6 +1903,9 @@ static int serial8250_startup(struct uart_port *port) unsigned char lsr, iir; int retval; + if (port->type == PORT_8250_CIR) + return -ENODEV; + port->fifosize = uart_config[up->port.type].fifo_size; up->tx_loadsz = uart_config[up->port.type].tx_loadsz; up->capabilities = uart_config[up->port.type].flags; @@ -2557,7 +2563,10 @@ static int serial8250_request_port(struct uart_port *port) { struct uart_8250_port *up = container_of(port, struct uart_8250_port, port); - int ret = 0; + int ret; + + if (port->type == PORT_8250_CIR) + return -ENODEV; ret = serial8250_request_std_resource(up); if (ret == 0 && port->type == PORT_RSA) { @@ -2576,6 +2585,9 @@ static void serial8250_config_port(struct uart_port *port, int flags) int probeflags = PROBE_ANY; int ret; + if (port->type == PORT_8250_CIR) + return; + /* * Find the region that we can probe for. This in turn * tells us whether we can probe for the type of port. @@ -3147,7 +3159,7 @@ int serial8250_register_8250_port(struct uart_8250_port *up) mutex_lock(&serial_mutex); uart = serial8250_find_match_or_unused(&up->port); - if (uart) { + if (uart && uart->port.type != PORT_8250_CIR) { if (uart->port.dev) uart_remove_one_port(&serial8250_reg, &uart->port); diff --git a/drivers/tty/serial/8250/8250_pnp.c b/drivers/tty/serial/8250/8250_pnp.c index 28bf830603a..f8ee25001dd 100644 --- a/drivers/tty/serial/8250/8250_pnp.c +++ b/drivers/tty/serial/8250/8250_pnp.c @@ -25,7 +25,7 @@ #include "8250.h" #define UNKNOWN_DEV 0x3000 - +#define CIR_PORT 0x0800 static const struct pnp_device_id pnp_dev_table[] = { /* Archtek America Corp. */ @@ -362,6 +362,9 @@ static const struct pnp_device_id pnp_dev_table[] = { { "PNPCXXX", UNKNOWN_DEV }, /* More unknown PnP modems */ { "PNPDXXX", UNKNOWN_DEV }, + /* Winbond CIR port, should not be probed. We should keep track + of it to prevent the legacy serial driver from probing it */ + { "WEC1022", CIR_PORT }, { "", 0 } }; @@ -409,7 +412,7 @@ static int __devinit check_resources(struct pnp_dev *dev) * PnP modems, alternatively we must hardcode all modems in pnp_devices[] * table. */ -static int __devinit serial_pnp_guess_board(struct pnp_dev *dev, int *flags) +static int __devinit serial_pnp_guess_board(struct pnp_dev *dev) { if (!(check_name(pnp_dev_name(dev)) || (dev->card && check_name(dev->card->name)))) @@ -428,7 +431,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) int ret, line, flags = dev_id->driver_data; if (flags & UNKNOWN_DEV) { - ret = serial_pnp_guess_board(dev, &flags); + ret = serial_pnp_guess_board(dev); if (ret < 0) return ret; } @@ -436,7 +439,10 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) memset(&uart, 0, sizeof(uart)); if (pnp_irq_valid(dev, 0)) uart.port.irq = pnp_irq(dev, 0); - if (pnp_port_valid(dev, 0)) { + if ((flags & CIR_PORT) && pnp_port_valid(dev, 2)) { + uart.port.iobase = pnp_port_start(dev, 2); + uart.port.iotype = UPIO_PORT; + } else if (pnp_port_valid(dev, 0)) { uart.port.iobase = pnp_port_start(dev, 0); uart.port.iotype = UPIO_PORT; } else if (pnp_mem_valid(dev, 0)) { @@ -451,6 +457,10 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) "Setup PNP port: port %x, mem 0x%lx, irq %d, type %d\n", uart.port.iobase, uart.port.mapbase, uart.port.irq, uart.port.iotype); #endif + if (flags & CIR_PORT) { + uart.port.flags |= UPF_FIXED_PORT | UPF_FIXED_TYPE; + uart.port.type = PORT_8250_CIR; + } uart.port.flags |= UPF_SKIP_TEST | UPF_BOOT_AUTOCONF; if (pnp_irq_flags(dev, 0) & IORESOURCE_IRQ_SHAREABLE) @@ -459,7 +469,7 @@ serial_pnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id) uart.port.dev = &dev->dev; line = serial8250_register_8250_port(&uart); - if (line < 0) + if (line < 0 || (flags & CIR_PORT)) return -ENODEV; pnp_set_drvdata(dev, (void *)((long)line + 1)); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 7cf0b68bbe9..bb010030828 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -48,7 +48,8 @@ #define PORT_TEGRA 20 /* NVIDIA Tegra internal UART */ #define PORT_XR17D15X 21 /* Exar XR17D15x UART */ #define PORT_LPC3220 22 /* NXP LPC32xx SoC "Standard" UART */ -#define PORT_MAX_8250 22 /* max port ID */ +#define PORT_8250_CIR 23 /* CIR infrared port, has its own driver */ +#define PORT_MAX_8250 23 /* max port ID */ /* * ARM specific type numbers. These are not currently guaranteed From 9a12fcf8b1543c99ffcec3d61db86f0dea52dc9d Mon Sep 17 00:00:00 2001 From: Shubhrajyoti D Date: Fri, 21 Sep 2012 20:07:19 +0530 Subject: [PATCH 218/235] serial: omap: fix the reciever line error case This patch does the following - In case of errors if there least one data character in the RX FIFO read it otherwise it may stall the receiver. This is recommended in the interrupt reset method in the table 23-246 of the omap4 TRM. Signed-off-by: Shubhrajyoti D Reviewed-by: Felipe Balbi Tested-by: Kevin Hilman Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/omap-serial.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c index 3c05c5ecdfb..ccc2f35adff 100644 --- a/drivers/tty/serial/omap-serial.c +++ b/drivers/tty/serial/omap-serial.c @@ -334,6 +334,10 @@ static unsigned int check_modem_status(struct uart_omap_port *up) static void serial_omap_rlsi(struct uart_omap_port *up, unsigned int lsr) { unsigned int flag; + unsigned char ch = 0; + + if (likely(lsr & UART_LSR_DR)) + ch = serial_in(up, UART_RX); up->port.icount.rx++; flag = TTY_NORMAL; From 26e8220adb0aec43b7acafa0f1431760eee28522 Mon Sep 17 00:00:00 2001 From: Flavio Leitner Date: Fri, 21 Sep 2012 21:04:34 -0300 Subject: [PATCH 219/235] serial: set correct baud_base for EXSYS EX-41092 Dual 16950 Apparently the same card model has two IDs, so this patch complements the commit 39aced68d664291db3324d0fcf0985ab5626aac2 adding the missing one. Signed-off-by: Flavio Leitner Cc: stable Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_pci.c | 9 +++++++-- include/linux/pci_ids.h | 1 - 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c index fdab80a4e06..cd5f2575fd4 100644 --- a/drivers/tty/serial/8250/8250_pci.c +++ b/drivers/tty/serial/8250/8250_pci.c @@ -1181,6 +1181,8 @@ pci_wch_ch353_setup(struct serial_private *priv, #define PCI_SUBDEVICE_ID_OCTPRO422 0x0208 #define PCI_SUBDEVICE_ID_POCTAL232 0x0308 #define PCI_SUBDEVICE_ID_POCTAL422 0x0408 +#define PCI_SUBDEVICE_ID_SIIG_DUAL_00 0x2500 +#define PCI_SUBDEVICE_ID_SIIG_DUAL_30 0x2530 #define PCI_VENDOR_ID_ADVANTECH 0x13fe #define PCI_DEVICE_ID_INTEL_CE4100_UART 0x2e66 #define PCI_DEVICE_ID_ADVANTECH_PCI3620 0x3620 @@ -3286,8 +3288,11 @@ static struct pci_device_id serial_pci_tbl[] = { * For now just used the hex ID 0x950a. */ { PCI_VENDOR_ID_OXSEMI, 0x950a, - PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_SERIAL, 0, 0, - pbn_b0_2_115200 }, + PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_00, + 0, 0, pbn_b0_2_115200 }, + { PCI_VENDOR_ID_OXSEMI, 0x950a, + PCI_SUBVENDOR_ID_SIIG, PCI_SUBDEVICE_ID_SIIG_DUAL_30, + 0, 0, pbn_b0_2_115200 }, { PCI_VENDOR_ID_OXSEMI, 0x950a, PCI_ANY_ID, PCI_ANY_ID, 0, 0, pbn_b0_2_1130000 }, diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h index 6b4565c440c..8d3c4271938 100644 --- a/include/linux/pci_ids.h +++ b/include/linux/pci_ids.h @@ -1847,7 +1847,6 @@ #define PCI_DEVICE_ID_SIIG_8S_20x_650 0x2081 #define PCI_DEVICE_ID_SIIG_8S_20x_850 0x2082 #define PCI_SUBDEVICE_ID_SIIG_QUARTET_SERIAL 0x2050 -#define PCI_SUBDEVICE_ID_SIIG_DUAL_SERIAL 0x2530 #define PCI_VENDOR_ID_RADISYS 0x1331 From 725ef4a3b68449611b523550739ab6d848cedafa Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 24 Sep 2012 08:17:08 +0200 Subject: [PATCH 220/235] Powerpc 8xx CPM_UART desynchronisation This patch fixes a desynchronisation problem with CPM UART driver on Powerpc MPC8xx. The problem happens if data is received before the device is open by the user application. Signed-off-by: Christophe Leroy Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/cpm_uart/cpm_uart_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index b418947b710..46af6e47f06 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -417,6 +417,7 @@ static int cpm_uart_startup(struct uart_port *port) clrbits32(&pinfo->sccp->scc_gsmrl, SCC_GSMRL_ENR); clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX); } + cpm_uart_initbd(pinfo); cpm_line_cr_cmd(pinfo, CPM_CR_INIT_TRX); } /* Install interrupt handler. */ From 59733ef7e510f6fd51a3dfc6f22ec1d3630a47b9 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 24 Sep 2012 08:19:03 +0200 Subject: [PATCH 221/235] Powerpc 8xx CPM_UART too many interrupts Setting the fifo to only 1 byte generates one interrupt every 1ms at 9600 bauds. This is too much. This patch reduces the threshold to speeds below 2400 bauds like in the 8250 UART driver. Signed-off-by: Christophe Leroy Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/cpm_uart/cpm_uart_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index 46af6e47f06..46edc649b0b 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -71,7 +71,7 @@ static void cpm_uart_initbd(struct uart_cpm_port *pinfo); /**************************************************************/ -#define HW_BUF_SPD_THRESHOLD 9600 +#define HW_BUF_SPD_THRESHOLD 2400 /* * Check, if transmit buffers are processed @@ -505,7 +505,7 @@ static void cpm_uart_set_termios(struct uart_port *port, pr_debug("CPM uart[%d]:set_termios\n", port->line); baud = uart_get_baud_rate(port, termios, old, 0, port->uartclk / 16); - if (baud <= HW_BUF_SPD_THRESHOLD || + if (baud < HW_BUF_SPD_THRESHOLD || (pinfo->port.state && pinfo->port.state->port.tty->low_latency)) pinfo->rx_fifosize = 1; else From fbbb9d9646f04768d0176f75e7fc93d29457b5db Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 24 Sep 2012 08:20:18 +0200 Subject: [PATCH 222/235] Powerpc 8xx CPM_UART maxidl should not depend on fifo size maxidl register was set to fifo size. There is no reason to set this register to same value as fifo size. Setting it now to 0x10 by default as in the UCC UART driver. Signed-off-by: Christophe Leroy Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/cpm_uart/cpm_uart_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index 46edc649b0b..7f6a1c7cb3d 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -799,7 +799,7 @@ static void cpm_uart_init_scc(struct uart_cpm_port *pinfo) cpm_set_scc_fcr(sup); out_be16(&sup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); - out_be16(&sup->scc_maxidl, pinfo->rx_fifosize); + out_be16(&sup->scc_maxidl, 0x10); out_be16(&sup->scc_brkcr, 1); out_be16(&sup->scc_parec, 0); out_be16(&sup->scc_frmec, 0); @@ -873,7 +873,7 @@ static void cpm_uart_init_smc(struct uart_cpm_port *pinfo) /* Using idle character time requires some additional tuning. */ out_be16(&up->smc_mrblr, pinfo->rx_fifosize); - out_be16(&up->smc_maxidl, pinfo->rx_fifosize); + out_be16(&up->smc_maxidl, 0x10); out_be16(&up->smc_brklen, 0); out_be16(&up->smc_brkec, 0); out_be16(&up->smc_brkcr, 1); From 6e62bdc07e1b397704354cf3bd58950943ecaaf1 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 24 Sep 2012 08:39:44 +0200 Subject: [PATCH 223/235] Powerpc 8xx CPM_UART setting MAXIDL register proportionaly to baud rate MAXIDL is the timeout after which a receive buffer is closed when not full if no more characters are received. We calculate it from the baudrate so that the duration is always the same at standard rates: about 4ms. At 9600 bauds it gives a timeout of 4 characters, which is the timeout on the 8250 UART. Signed-off-by: Christophe Leroy Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/cpm_uart/cpm_uart_core.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/tty/serial/cpm_uart/cpm_uart_core.c b/drivers/tty/serial/cpm_uart/cpm_uart_core.c index 7f6a1c7cb3d..d0dd9194cec 100644 --- a/drivers/tty/serial/cpm_uart/cpm_uart_core.c +++ b/drivers/tty/serial/cpm_uart/cpm_uart_core.c @@ -501,6 +501,7 @@ static void cpm_uart_set_termios(struct uart_port *port, struct uart_cpm_port *pinfo = (struct uart_cpm_port *)port; smc_t __iomem *smcp = pinfo->smcp; scc_t __iomem *sccp = pinfo->sccp; + int maxidl; pr_debug("CPM uart[%d]:set_termios\n", port->line); @@ -511,6 +512,17 @@ static void cpm_uart_set_termios(struct uart_port *port, else pinfo->rx_fifosize = RX_BUF_SIZE; + /* MAXIDL is the timeout after which a receive buffer is closed + * when not full if no more characters are received. + * We calculate it from the baudrate so that the duration is + * always the same at standard rates: about 4ms. + */ + maxidl = baud / 2400; + if (maxidl < 1) + maxidl = 1; + if (maxidl > 0x10) + maxidl = 0x10; + /* Character length programmed into the mode register is the * sum of: 1 start bit, number of data bits, 0 or 1 parity bit, * 1 or 2 stop bits, minus 1. @@ -611,6 +623,7 @@ static void cpm_uart_set_termios(struct uart_port *port, * SMC/SCC receiver is disabled. */ out_be16(&pinfo->smcup->smc_mrblr, pinfo->rx_fifosize); + out_be16(&pinfo->smcup->smc_maxidl, maxidl); /* Set the mode register. We want to keep a copy of the * enables, because we want to put them back if they were @@ -623,6 +636,7 @@ static void cpm_uart_set_termios(struct uart_port *port, SMCMR_SM_UART | prev_mode); } else { out_be16(&pinfo->sccup->scc_genscc.scc_mrblr, pinfo->rx_fifosize); + out_be16(&pinfo->sccup->scc_maxidl, maxidl); out_be16(&sccp->scc_psmr, (sbits << 12) | scval); } From 93b5c032d95e032691e627526b364cd463834347 Mon Sep 17 00:00:00 2001 From: Julien Pichon Date: Fri, 21 Sep 2012 23:22:31 -0700 Subject: [PATCH 224/235] serial: samsung: Add poll_get_char & poll_put_char The following patch allows users to use KGDB over serial console on board based on Samsung SOC. It has been tested on a board using exynos5. [dianders: changed poll to return NO_POLL_CHAR, which appears to fix 'help' in kgdb; also updated commit message] Signed-off-by: Julien Pichon Signed-off-by: Doug Anderson Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/samsung.c | 47 ++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 8eef1141b81..7f04717176a 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -876,11 +876,24 @@ s3c24xx_serial_verify_port(struct uart_port *port, struct serial_struct *ser) static struct console s3c24xx_serial_console; +static int __init s3c24xx_serial_console_init(void) +{ + register_console(&s3c24xx_serial_console); + return 0; +} +console_initcall(s3c24xx_serial_console_init); + #define S3C24XX_SERIAL_CONSOLE &s3c24xx_serial_console #else #define S3C24XX_SERIAL_CONSOLE NULL #endif +#ifdef CONFIG_CONSOLE_POLL +static int s3c24xx_serial_get_poll_char(struct uart_port *port); +static void s3c24xx_serial_put_poll_char(struct uart_port *port, + unsigned char c); +#endif + static struct uart_ops s3c24xx_serial_ops = { .pm = s3c24xx_serial_pm, .tx_empty = s3c24xx_serial_tx_empty, @@ -899,6 +912,10 @@ static struct uart_ops s3c24xx_serial_ops = { .request_port = s3c24xx_serial_request_port, .config_port = s3c24xx_serial_config_port, .verify_port = s3c24xx_serial_verify_port, +#ifdef CONFIG_CONSOLE_POLL + .poll_get_char = s3c24xx_serial_get_poll_char, + .poll_put_char = s3c24xx_serial_put_poll_char, +#endif }; static struct uart_driver s3c24xx_uart_drv = { @@ -1316,6 +1333,36 @@ s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon) return (utrstat & S3C2410_UTRSTAT_TXE) ? 1 : 0; } +#ifdef CONFIG_CONSOLE_POLL +/* + * Console polling routines for writing and reading from the uart while + * in an interrupt or debug context. + */ + +static int s3c24xx_serial_get_poll_char(struct uart_port *port) +{ + struct s3c24xx_uart_port *ourport = to_ourport(port); + unsigned int ufstat; + + ufstat = rd_regl(port, S3C2410_UFSTAT); + if (s3c24xx_serial_rx_fifocnt(ourport, ufstat) == 0) + return NO_POLL_CHAR; + + return rd_regb(port, S3C2410_URXH); +} + +static void s3c24xx_serial_put_poll_char(struct uart_port *port, + unsigned char c) +{ + unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON); + + while (!s3c24xx_serial_console_txrdy(port, ufcon)) + cpu_relax(); + wr_regb(cons_uart, S3C2410_UTXH, c); +} + +#endif /* CONFIG_CONSOLE_POLL */ + static void s3c24xx_serial_console_putchar(struct uart_port *port, int ch) { From 1685118f55209a518bb5efbbc91706f8b7fa7ffa Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Mon, 24 Sep 2012 21:12:00 +0400 Subject: [PATCH 225/235] serial: sccnxp: Report actual baudrate back to core Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index 05d767cf82a..a7a6659b96e 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -213,7 +213,7 @@ const struct baud_table baud_std[] = { { 0, 0, 0, 0 } }; -static void sccnxp_set_baud(struct uart_port *port, int baud) +static int sccnxp_set_baud(struct uart_port *port, int baud) { struct sccnxp_port *s = dev_get_drvdata(port->dev); int div_std, tmp_baud, bestbaud = baud, besterr = -1; @@ -244,8 +244,11 @@ static void sccnxp_set_baud(struct uart_port *port, int baud) sccnxp_port_write(port, SCCNXP_ACR_REG, acr | ACR_TIMER_MODE); sccnxp_port_write(port, SCCNXP_CSR_REG, (csr << 4) | csr); - dev_dbg(port->dev, "Baudrate desired: %i, calculated: %i\n", - baud, bestbaud); + if (baud != bestbaud) + dev_dbg(port->dev, "Baudrate desired: %i, calculated: %i\n", + baud, bestbaud); + + return bestbaud; } static void sccnxp_enable_irq(struct uart_port *port, int mask) @@ -587,11 +590,14 @@ static void sccnxp_set_termios(struct uart_port *port, baud = uart_get_baud_rate(port, termios, old, 50, (s->flags & SCCNXP_HAVE_MR0) ? 230400 : 38400); - sccnxp_set_baud(port, baud); + baud = sccnxp_set_baud(port, baud); /* Update timeout according to new baud rate */ uart_update_timeout(port, termios->c_cflag, baud); + if (tty_termios_baud_rate(termios)) + tty_termios_encode_baud_rate(termios, baud, baud); + /* Enable RX & TX */ sccnxp_port_write(port, SCCNXP_CR_REG, CR_RX_ENABLE | CR_TX_ENABLE); From 3195fd23f8ea71344bd9bb2b451e72f4289e03ec Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Mon, 24 Sep 2012 21:12:01 +0400 Subject: [PATCH 226/235] serial: sccnxp: Remove mask termios caps for SW flow control The kernel will handle IXON/IXOFF/IXANY in software if the hardware doesn't do it. Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index a7a6659b96e..f06981df80b 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -531,7 +531,6 @@ static void sccnxp_set_termios(struct uart_port *port, /* Mask termios capabilities we don't support */ termios->c_cflag &= ~CMSPAR; - termios->c_iflag &= ~(IXON | IXOFF | IXANY); /* Disable RX & TX, reset break condition, status and FIFOs */ sccnxp_port_write(port, SCCNXP_CR_REG, CR_CMD_RX_RESET | From 91f61ce24f95f6d5f96efb56e0a8633e19184289 Mon Sep 17 00:00:00 2001 From: Alexander Shiyan Date: Mon, 24 Sep 2012 21:12:02 +0400 Subject: [PATCH 227/235] serial: sccnxp: Make 'default' choice in switch last Signed-off-by: Alexander Shiyan Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/sccnxp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/sccnxp.c b/drivers/tty/serial/sccnxp.c index f06981df80b..b7086d004f5 100644 --- a/drivers/tty/serial/sccnxp.c +++ b/drivers/tty/serial/sccnxp.c @@ -550,8 +550,8 @@ static void sccnxp_set_termios(struct uart_port *port, case CS7: mr1 = MR1_BITS_7; break; - default: case CS8: + default: mr1 = MR1_BITS_8; break; } From c5dd553b9fd069892c9e2de734f4f604e280fa7a Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 26 Sep 2012 17:21:36 +0200 Subject: [PATCH 228/235] serial: pl011: handle corruption at high clock speeds This works around a few glitches in the ST version of the PL011 serial driver when using very high baud rates, as we do in the Ux500: 3, 3.25, 4 and 4.05 Mbps. Problem Observed/rootcause: When using high baud-rates, and the baudrate*8 is getting close to the provided clock frequency (so a division factor close to 1), when using bursts of characters (so they are abutted), then it seems as if there is not enough time to detect the beginning of the start-bit which is a timing reference for the entire character, and thus the sampling moment of character bits is moving towards the end of each bit, instead of the middle. Fix: Increase slightly the RX baud rate of the UART above the theoretical baudrate by 5%. This will definitely give more margin time to the UART_RX to correctly sample the data at the middle of the bit period. Also fix the ages old copy-paste error in the very stressed comment, it's referencing the registers used in the PL010 driver rather than the PL011 ones. Signed-off-by: Guillaume Jaunet Signed-off-by: Christophe Arnal Signed-off-by: Matthias Locher Signed-off-by: Rajanikanth HV Cc: stable Cc: Bibek Basu Cc: Par-Gunnar Hjalmdahl Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index cede9387664..925eb8813a4 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1595,13 +1595,26 @@ pl011_set_termios(struct uart_port *port, struct ktermios *termios, old_cr &= ~ST_UART011_CR_OVSFACT; } + /* + * Workaround for the ST Micro oversampling variants to + * increase the bitrate slightly, by lowering the divisor, + * to avoid delayed sampling of start bit at high speeds, + * else we see data corruption. + */ + if (uap->vendor->oversampling) { + if ((baud >= 3000000) && (baud < 3250000) && (quot > 1)) + quot -= 1; + else if ((baud > 3250000) && (quot > 2)) + quot -= 2; + } /* Set baud rate */ writew(quot & 0x3f, port->membase + UART011_FBRD); writew(quot >> 6, port->membase + UART011_IBRD); /* * ----------v----------v----------v----------v----- - * NOTE: MUST BE WRITTEN AFTER UARTLCR_M & UARTLCR_L + * NOTE: lcrh_tx and lcrh_rx MUST BE WRITTEN AFTER + * UART011_FBRD & UART011_IBRD. * ----------^----------^----------^----------^----- */ writew(lcr_h, port->membase + uap->lcrh_rx); From 5a14fead07bcf4e0acc877a8d9e1d1f40a441153 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:50 -0700 Subject: [PATCH 229/235] kernel/debug: Mask KGDB NMI upon entry The new arch callback should manage NMIs that usually cause KGDB to enter. That is, not all NMIs should be enabled/disabled, but only those that issue kgdb_handle_exception(). We must mask it as serial-line interrupt can be used as an NMI, so if the original KGDB-entry cause was say a breakpoint, then every input to KDB console will cause KGDB to reenter, which we don't want. Signed-off-by: Anton Vorontsov Acked-by: Jason Wessel Signed-off-by: Greg Kroah-Hartman --- include/linux/kgdb.h | 3 +++ kernel/debug/debug_core.c | 14 +++++++++++--- 2 files changed, 14 insertions(+), 3 deletions(-) diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h index c4d2fc194ed..7800cce284d 100644 --- a/include/linux/kgdb.h +++ b/include/linux/kgdb.h @@ -240,6 +240,7 @@ extern void kgdb_arch_late(void); * hardware breakpoints. * @correct_hw_break: Allow an architecture to specify how to correct the * hardware debug registers. + * @enable_nmi: Manage NMI-triggered entry to KGDB */ struct kgdb_arch { unsigned char gdb_bpt_instr[BREAK_INSTR_SIZE]; @@ -252,6 +253,8 @@ struct kgdb_arch { void (*disable_hw_break)(struct pt_regs *regs); void (*remove_all_hw_break)(void); void (*correct_hw_break)(void); + + void (*enable_nmi)(bool on); }; /** diff --git a/kernel/debug/debug_core.c b/kernel/debug/debug_core.c index 0557f24c6bc..17e073c309e 100644 --- a/kernel/debug/debug_core.c +++ b/kernel/debug/debug_core.c @@ -672,6 +672,10 @@ kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs) { struct kgdb_state kgdb_var; struct kgdb_state *ks = &kgdb_var; + int ret = 0; + + if (arch_kgdb_ops.enable_nmi) + arch_kgdb_ops.enable_nmi(0); ks->cpu = raw_smp_processor_id(); ks->ex_vector = evector; @@ -681,11 +685,15 @@ kgdb_handle_exception(int evector, int signo, int ecode, struct pt_regs *regs) ks->linux_regs = regs; if (kgdb_reenter_check(ks)) - return 0; /* Ouch, double exception ! */ + goto out; /* Ouch, double exception ! */ if (kgdb_info[ks->cpu].enter_kgdb != 0) - return 0; + goto out; - return kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER); + ret = kgdb_cpu_enter(ks, regs, DCPU_WANT_MASTER); +out: + if (arch_kgdb_ops.enable_nmi) + arch_kgdb_ops.enable_nmi(1); + return ret; } int kgdb_nmicallback(int cpu, void *regs) From ad394f66fa57ae66014cb74f337e2820bac4c417 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:51 -0700 Subject: [PATCH 230/235] kdb: Implement disable_nmi command This command disables NMI-entry. If NMI source has been previously shared with a serial console ("debug port"), this effectively releases the port from KDB exclusive use, and makes the console available for normal use. Of course, NMI can be reenabled, enable_nmi modparam is used for that: echo 1 > /sys/module/kdb/parameters/enable_nmi Signed-off-by: Anton Vorontsov Acked-by: Jason Wessel Signed-off-by: Greg Kroah-Hartman --- kernel/debug/kdb/kdb_main.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) diff --git a/kernel/debug/kdb/kdb_main.c b/kernel/debug/kdb/kdb_main.c index 31df1706b9a..1261dc7eaeb 100644 --- a/kernel/debug/kdb/kdb_main.c +++ b/kernel/debug/kdb/kdb_main.c @@ -21,6 +21,7 @@ #include #include #include +#include #include #include #include @@ -2107,6 +2108,32 @@ static int kdb_dmesg(int argc, const char **argv) return 0; } #endif /* CONFIG_PRINTK */ + +/* Make sure we balance enable/disable calls, must disable first. */ +static atomic_t kdb_nmi_disabled; + +static int kdb_disable_nmi(int argc, const char *argv[]) +{ + if (atomic_read(&kdb_nmi_disabled)) + return 0; + atomic_set(&kdb_nmi_disabled, 1); + arch_kgdb_ops.enable_nmi(0); + return 0; +} + +static int kdb_param_enable_nmi(const char *val, const struct kernel_param *kp) +{ + if (!atomic_add_unless(&kdb_nmi_disabled, -1, 0)) + return -EINVAL; + arch_kgdb_ops.enable_nmi(1); + return 0; +} + +static const struct kernel_param_ops kdb_param_ops_enable_nmi = { + .set = kdb_param_enable_nmi, +}; +module_param_cb(enable_nmi, &kdb_param_ops_enable_nmi, NULL, 0600); + /* * kdb_cpu - This function implements the 'cpu' command. * cpu [] @@ -2851,6 +2878,10 @@ static void __init kdb_inittab(void) kdb_register_repeat("dmesg", kdb_dmesg, "[lines]", "Display syslog buffer", 0, KDB_REPEAT_NONE); #endif + if (arch_kgdb_ops.enable_nmi) { + kdb_register_repeat("disable_nmi", kdb_disable_nmi, "", + "Disable NMI entry to KDB", 0, KDB_REPEAT_NONE); + } kdb_register_repeat("defcmd", kdb_defcmd, "name \"usage\" \"help\"", "Define a set of commands, down to endefcmd", 0, KDB_REPEAT_NONE); kdb_register_repeat("kill", kdb_kill, "<-signal> ", From 729043e82cdd403a131127254528afea8031ebab Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:52 -0700 Subject: [PATCH 231/235] kdb: Turn KGDB_KDB=n stubs into static inlines This makes the stubs actually usable, since e.g. 'foo = kdb_register();' leads to build errors in !KGDB_KDB case. Plus, with static inlines we do type checking. Signed-off-by: Anton Vorontsov Acked-by: Jason Wessel Signed-off-by: Greg Kroah-Hartman --- include/linux/kdb.h | 29 ++++++++++++++++------------- 1 file changed, 16 insertions(+), 13 deletions(-) diff --git a/include/linux/kdb.h b/include/linux/kdb.h index 42d9e863a31..7f6fe6e015b 100644 --- a/include/linux/kdb.h +++ b/include/linux/kdb.h @@ -13,6 +13,14 @@ * Copyright (C) 2009 Jason Wessel */ +typedef enum { + KDB_REPEAT_NONE = 0, /* Do not repeat this command */ + KDB_REPEAT_NO_ARGS, /* Repeat the command without arguments */ + KDB_REPEAT_WITH_ARGS, /* Repeat the command including its arguments */ +} kdb_repeat_t; + +typedef int (*kdb_func_t)(int, const char **); + #ifdef CONFIG_KGDB_KDB #include #include @@ -32,14 +40,6 @@ extern atomic_t kdb_event; #define KDB_MAXARGS 16 /* Maximum number of arguments to a function */ -typedef enum { - KDB_REPEAT_NONE = 0, /* Do not repeat this command */ - KDB_REPEAT_NO_ARGS, /* Repeat the command without arguments */ - KDB_REPEAT_WITH_ARGS, /* Repeat the command including its arguments */ -} kdb_repeat_t; - -typedef int (*kdb_func_t)(int, const char **); - /* KDB return codes from a command or internal kdb function */ #define KDB_NOTFOUND (-1) #define KDB_ARGCOUNT (-2) @@ -149,11 +149,14 @@ extern int kdb_register_repeat(char *, kdb_func_t, char *, char *, short, kdb_repeat_t); extern int kdb_unregister(char *); #else /* ! CONFIG_KGDB_KDB */ -#define kdb_printf(...) -#define kdb_init(x) -#define kdb_register(...) -#define kdb_register_repeat(...) -#define kdb_uregister(x) +static inline __printf(1, 2) int kdb_printf(const char *fmt, ...) { return 0; } +static inline void kdb_init(int level) {} +static inline int kdb_register(char *cmd, kdb_func_t func, char *usage, + char *help, short minlen) { return 0; } +static inline int kdb_register_repeat(char *cmd, kdb_func_t func, char *usage, + char *help, short minlen, + kdb_repeat_t repeat) { return 0; } +static inline int kdb_unregister(char *cmd) { return 0; } #endif /* CONFIG_KGDB_KDB */ enum { KDB_NOT_INITIALIZED, From c7f3e7087ab0abb52bb1286010f2c104fd38ca5c Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:53 -0700 Subject: [PATCH 232/235] tty/serial/core: Introduce poll_init callback It was noticed that polling drivers (like KGDB) are not able to use serial ports if the ports were not previously initialized via console. I.e. when booting with console=ttyAMA0 kgdboc=ttyAMA0, everything works fine, but with console=ttyFOO kgdboc=ttyAMA0, the kgdboc doesn't work. This is because we don't initialize the hardware. Calling ->startup() is not an option, because drivers request interrupts there, and drivers fail to handle situations when tty isn't opened with interrupts enabled. So, we have to implement a new callback (actually, tty_ops already have a similar callback), which does everything needed to initialize just the hardware. Signed-off-by: Anton Vorontsov Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/serial_core.c | 17 +++++++++++++++++ include/linux/serial_core.h | 1 + 2 files changed, 18 insertions(+) diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 78036c510cc..0fcfd98a956 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2129,6 +2129,7 @@ static int uart_poll_init(struct tty_driver *driver, int line, char *options) int bits = 8; int parity = 'n'; int flow = 'n'; + int ret; if (!state || !state->uart_port) return -1; @@ -2137,6 +2138,22 @@ static int uart_poll_init(struct tty_driver *driver, int line, char *options) if (!(port->ops->poll_get_char && port->ops->poll_put_char)) return -1; + if (port->ops->poll_init) { + struct tty_port *tport = &state->port; + + ret = 0; + mutex_lock(&tport->mutex); + /* + * We don't set ASYNCB_INITIALIZED as we only initialized the + * hw, e.g. state->xmit is still uninitialized. + */ + if (!test_bit(ASYNCB_INITIALIZED, &tport->flags)) + ret = port->ops->poll_init(port); + mutex_unlock(&tport->mutex); + if (ret) + return ret; + } + if (options) { uart_parse_options(options, &baud, &parity, &bits, &flow); return uart_set_options(port, NULL, baud, parity, bits, flow); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index bb010030828..f9b22ec7a9f 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -275,6 +275,7 @@ struct uart_ops { int (*verify_port)(struct uart_port *, struct serial_struct *); int (*ioctl)(struct uart_port *, unsigned int, unsigned long); #ifdef CONFIG_CONSOLE_POLL + int (*poll_init)(struct uart_port *); void (*poll_put_char)(struct uart_port *, unsigned char); int (*poll_get_char)(struct uart_port *); #endif From b3564c2cf464e11f8cb4f8d9c124e5e0f5418e3f Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:54 -0700 Subject: [PATCH 233/235] tty/serial/amba-pl011: Implement poll_init callback The callback is used to initialize the hardware, nothing else should be done, i.e. we should not request interrupts (but we can and do unmask some of them, as they might be useful for NMI entry). As a side-effect, the patch also fixes a division by zero[1] when booting with kgdboc options specified (e.g. kgdboc=ttyAMA0,115200n8). The issue happens because serial core calls set_termios callback, but the driver doesn't know clock frequency, and thus cannot calculate proper baud rate values. [1] WARNING: at drivers/tty/serial/serial_core.c:400 uart_get_baud_rate+0xe8/0x14c() Modules linked in: [] (unwind_backtrace+0x0/0xf0) from [] (warn_slowpath_common+0x4c/0x64) [] (warn_slowpath_common+0x4c/0x64) from [] (warn_slowpath_null+0x1c/0x24) [] (warn_slowpath_null+0x1c/0x24) from [] (uart_get_baud_rate+0xe8/0x14c) [] (uart_get_baud_rate+0xe8/0x14c) from [] (pl011_set_termios+0x48/0x278) [] (pl011_set_termios+0x48/0x278) from [] (uart_set_options+0xe8/0x114) [] (uart_set_options+0xe8/0x114) from [] (uart_poll_init+0xd4/0xe0) [] (uart_poll_init+0xd4/0xe0) from [] (tty_find_polling_driver+0x100/0x17c) [] (tty_find_polling_driver+0x100/0x17c) from [] (configure_kgdboc+0xc8/0x1b8) [] (configure_kgdboc+0xc8/0x1b8) from [] (do_one_initcall+0x30/0x168) [] (do_one_initcall+0x30/0x168) from [] (do_basic_setup+0x94/0xc8) [] (do_basic_setup+0x94/0xc8) from [] (kernel_init+0x60/0xf4) [] (kernel_init+0x60/0xf4) from [] (kernel_thread_exit+0x0/0x8) ---[ end trace 7d41c9186f342c40 ]--- Division by zero in kernel. [] (unwind_backtrace+0x0/0xf0) from [] (Ldiv0+0x8/0x10) [] (Ldiv0+0x8/0x10) from [] (pl011_set_termios+0x68/0x278) [] (pl011_set_termios+0x68/0x278) from [] (uart_set_options+0xe8/0x114) [] (uart_set_options+0xe8/0x114) from [] (uart_poll_init+0xd4/0xe0) [] (uart_poll_init+0xd4/0xe0) from [] (tty_find_polling_driver+0x100/0x17c) [] (tty_find_polling_driver+0x100/0x17c) from [] (configure_kgdboc+0xc8/0x1b8) [] (configure_kgdboc+0xc8/0x1b8) from [] (do_one_initcall+0x30/0x168) [] (do_one_initcall+0x30/0x168) from [] (do_basic_setup+0x94/0xc8) [] (do_basic_setup+0x94/0xc8) from [] (kernel_init+0x60/0xf4) [] (kernel_init+0x60/0xf4) from [] (kernel_thread_exit+0x0/0x8) Division by zero in kernel. [] (unwind_backtrace+0x0/0xf0) from [] (Ldiv0+0x8/0x10) [] (Ldiv0+0x8/0x10) from [] (uart_update_timeout+0x4c/0x5c) [] (uart_update_timeout+0x4c/0x5c) from [] (pl011_set_termios+0xc8/0x278) [] (pl011_set_termios+0xc8/0x278) from [] (uart_set_options+0xe8/0x114) [] (uart_set_options+0xe8/0x114) from [] (uart_poll_init+0xd4/0xe0) [] (uart_poll_init+0xd4/0xe0) from [] (tty_find_polling_driver+0x100/0x17c) [] (tty_find_polling_driver+0x100/0x17c) from [] (configure_kgdboc+0xc8/0x1b8) [] (configure_kgdboc+0xc8/0x1b8) from [] (do_one_initcall+0x30/0x168) [] (do_one_initcall+0x30/0x168) from [] (do_basic_setup+0x94/0xc8) [] (do_basic_setup+0x94/0xc8) from [] (kernel_init+0x60/0xf4) [] (kernel_init+0x60/0xf4) from [] (kernel_thread_exit+0x0/0x8) Signed-off-by: Anton Vorontsov Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 44 ++++++++++++++++++++++++--------- 1 file changed, 33 insertions(+), 11 deletions(-) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index 925eb8813a4..ea7aa973ab4 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1309,10 +1309,9 @@ static void pl011_put_poll_char(struct uart_port *port, #endif /* CONFIG_CONSOLE_POLL */ -static int pl011_startup(struct uart_port *port) +static int pl011_hwinit(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; - unsigned int cr; int retval; /* Optionaly enable pins to be muxed in and configured */ @@ -1336,6 +1335,37 @@ static int pl011_startup(struct uart_port *port) writew(UART011_OEIS | UART011_BEIS | UART011_PEIS | UART011_FEIS | UART011_RTIS | UART011_RXIS, uap->port.membase + UART011_ICR); + /* + * Save interrupts enable mask, and enable RX interrupts in case if + * the interrupt is used for NMI entry. + */ + uap->im = readw(uap->port.membase + UART011_IMSC); + writew(UART011_RTIM | UART011_RXIM, uap->port.membase + UART011_IMSC); + + if (uap->port.dev->platform_data) { + struct amba_pl011_data *plat; + + plat = uap->port.dev->platform_data; + if (plat->init) + plat->init(); + } + return 0; + out: + return retval; +} + +static int pl011_startup(struct uart_port *port) +{ + struct uart_amba_port *uap = (struct uart_amba_port *)port; + unsigned int cr; + int retval; + + retval = pl011_hwinit(port); + if (retval) + goto clk_dis; + + writew(uap->im, uap->port.membase + UART011_IMSC); + /* * Allocate the IRQ */ @@ -1395,19 +1425,10 @@ static int pl011_startup(struct uart_port *port) writew(uap->im, uap->port.membase + UART011_IMSC); spin_unlock_irq(&uap->port.lock); - if (uap->port.dev->platform_data) { - struct amba_pl011_data *plat; - - plat = uap->port.dev->platform_data; - if (plat->init) - plat->init(); - } - return 0; clk_dis: clk_disable_unprepare(uap->clk); - out: return retval; } @@ -1701,6 +1722,7 @@ static struct uart_ops amba_pl011_pops = { .config_port = pl011_config_port, .verify_port = pl011_verify_port, #ifdef CONFIG_CONSOLE_POLL + .poll_init = pl011_hwinit, .poll_get_char = pl011_get_poll_char, .poll_put_char = pl011_put_poll_char, #endif From 5c8124a0f8f50c5671b028b7a030d893a3a1a539 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:55 -0700 Subject: [PATCH 234/235] tty/serial/amba-pl011: Quiesce interrupts in poll_get_char We need to quiesce interrupts in the poll_get_char routine, otherwise, if used with KGDB NMI debugger, we'll keep reentering the NMI. Quiescing interrupts is pretty straightforward, except for TXIM interrupt. The interrupt has "ready to transmit" meaning, so it's almost always raised, and the only way to silence it is to mask it. But that's OK, ops->start_tx will unmask it. Signed-off-by: Anton Vorontsov Acked-by: Alan Cox Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/amba-pl011.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c index ea7aa973ab4..d7e1edec50b 100644 --- a/drivers/tty/serial/amba-pl011.c +++ b/drivers/tty/serial/amba-pl011.c @@ -1284,11 +1284,40 @@ static void pl011_break_ctl(struct uart_port *port, int break_state) } #ifdef CONFIG_CONSOLE_POLL + +static void pl011_quiesce_irqs(struct uart_port *port) +{ + struct uart_amba_port *uap = (struct uart_amba_port *)port; + unsigned char __iomem *regs = uap->port.membase; + + writew(readw(regs + UART011_MIS), regs + UART011_ICR); + /* + * There is no way to clear TXIM as this is "ready to transmit IRQ", so + * we simply mask it. start_tx() will unmask it. + * + * Note we can race with start_tx(), and if the race happens, the + * polling user might get another interrupt just after we clear it. + * But it should be OK and can happen even w/o the race, e.g. + * controller immediately got some new data and raised the IRQ. + * + * And whoever uses polling routines assumes that it manages the device + * (including tx queue), so we're also fine with start_tx()'s caller + * side. + */ + writew(readw(regs + UART011_IMSC) & ~UART011_TXIM, regs + UART011_IMSC); +} + static int pl011_get_poll_char(struct uart_port *port) { struct uart_amba_port *uap = (struct uart_amba_port *)port; unsigned int status; + /* + * The caller might need IRQs lowered, e.g. if used with KDB NMI + * debugger. + */ + pl011_quiesce_irqs(port); + status = readw(uap->port.membase + UART01x_FR); if (status & UART01x_FR_RXFE) return NO_POLL_CHAR; From 0c57dfcc6c1d037243c2f8fbf62eab3633326ec0 Mon Sep 17 00:00:00 2001 From: Anton Vorontsov Date: Mon, 24 Sep 2012 14:27:56 -0700 Subject: [PATCH 235/235] tty/serial: Add kgdb_nmi driver This special driver makes it possible to temporary use NMI debugger port as a normal console by issuing 'nmi_console' command (assuming that the port is attached to KGDB). Unlike KDB's disable_nmi command, with this driver you are always able to go back to the debugger using KGDB escape sequence ($3#33). This is because this console driver processes the input in NMI context, and thus is able to intercept the magic sequence. Note that since the console interprets input and uses polling communication methods, for things like PPP it is still better to fully detach debugger port from the KGDB NMI (i.e. disable_nmi), and use raw console. Usually, to enter the debugger one have to type the magic sequence, so initially the kernel will print the following prompt on the NMI debugger console: Type $3#33 to enter the debugger> For convenience, there is a kgdb_fiq.knock kernel command line option, when set to 0, this turns the special command to just a return key press, so the kernel will be printing this: Hit to enter the debugger> This is more convenient for long debugging sessions, although it makes nmi_console feature somewhat useless. And for the cases when NMI connected to a dedicated button, the knocking can be disabled altogether by setting kgdb_fiq.knock to -1. Suggested-by: Colin Cross Signed-off-by: Anton Vorontsov Acked-by: Alan Cox Acked-by: Jason Wessel Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/Kconfig | 19 ++ drivers/tty/serial/Makefile | 1 + drivers/tty/serial/kgdb_nmi.c | 402 ++++++++++++++++++++++++++++++++++ drivers/tty/serial/kgdboc.c | 9 + include/linux/kgdb.h | 10 + 5 files changed, 441 insertions(+) create mode 100644 drivers/tty/serial/kgdb_nmi.c diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig index 2a9659dfb74..233fbaaf255 100644 --- a/drivers/tty/serial/Kconfig +++ b/drivers/tty/serial/Kconfig @@ -141,6 +141,25 @@ config SERIAL_ATMEL_TTYAT Say Y if you have an external 8250/16C550 UART. If unsure, say N. +config SERIAL_KGDB_NMI + bool "Serial console over KGDB NMI debugger port" + depends on KGDB_SERIAL_CONSOLE + help + This special driver allows you to temporary use NMI debugger port + as a normal console (assuming that the port is attached to KGDB). + + Unlike KDB's disable_nmi command, with this driver you are always + able to go back to the debugger using KGDB escape sequence ($3#33). + This is because this console driver processes the input in NMI + context, and thus is able to intercept the magic sequence. + + Note that since the console interprets input and uses polling + communication methods, for things like PPP you still must fully + detach debugger port from the KGDB NMI (i.e. disable_nmi), and + use raw console. + + If unsure, say N. + config SERIAL_KS8695 bool "Micrel KS8695 (Centaur) serial port support" depends on ARCH_KS8695 diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile index ce88667cfd1..4f694dafa71 100644 --- a/drivers/tty/serial/Makefile +++ b/drivers/tty/serial/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_SERIAL_MSM_HS) += msm_serial_hs.o obj-$(CONFIG_SERIAL_NETX) += netx-serial.o obj-$(CONFIG_SERIAL_OF_PLATFORM) += of_serial.o obj-$(CONFIG_SERIAL_OF_PLATFORM_NWPSERIAL) += nwpserial.o +obj-$(CONFIG_SERIAL_KGDB_NMI) += kgdb_nmi.o obj-$(CONFIG_SERIAL_KS8695) += serial_ks8695.o obj-$(CONFIG_SERIAL_OMAP) += omap-serial.o obj-$(CONFIG_SERIAL_ALTERA_UART) += altera_uart.o diff --git a/drivers/tty/serial/kgdb_nmi.c b/drivers/tty/serial/kgdb_nmi.c new file mode 100644 index 00000000000..d185247ba1a --- /dev/null +++ b/drivers/tty/serial/kgdb_nmi.c @@ -0,0 +1,402 @@ +/* + * KGDB NMI serial console + * + * Copyright 2010 Google, Inc. + * Arve Hjønnevåg + * Colin Cross + * Copyright 2012 Linaro Ltd. + * Anton Vorontsov + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static int kgdb_nmi_knock = 1; +module_param_named(knock, kgdb_nmi_knock, int, 0600); +MODULE_PARM_DESC(knock, "if set to 1 (default), the special '$3#33' command " \ + "must be used to enter the debugger; when set to 0, " \ + "hitting return key is enough to enter the debugger; " \ + "when set to -1, the debugger is entered immediately " \ + "upon NMI"); + +static char *kgdb_nmi_magic = "$3#33"; +module_param_named(magic, kgdb_nmi_magic, charp, 0600); +MODULE_PARM_DESC(magic, "magic sequence to enter NMI debugger (default $3#33)"); + +static bool kgdb_nmi_tty_enabled; + +static void kgdb_nmi_console_write(struct console *co, const char *s, uint c) +{ + int i; + + if (!kgdb_nmi_tty_enabled || atomic_read(&kgdb_active) >= 0) + return; + + for (i = 0; i < c; i++) + dbg_io_ops->write_char(s[i]); +} + +static struct tty_driver *kgdb_nmi_tty_driver; + +static struct tty_driver *kgdb_nmi_console_device(struct console *co, int *idx) +{ + *idx = co->index; + return kgdb_nmi_tty_driver; +} + +static struct console kgdb_nmi_console = { + .name = "ttyNMI", + .write = kgdb_nmi_console_write, + .device = kgdb_nmi_console_device, + .flags = CON_PRINTBUFFER | CON_ANYTIME | CON_ENABLED, + .index = -1, +}; + +/* + * This is usually the maximum rate on debug ports. We make fifo large enough + * to make copy-pasting to the terminal usable. + */ +#define KGDB_NMI_BAUD 115200 +#define KGDB_NMI_FIFO_SIZE roundup_pow_of_two(KGDB_NMI_BAUD / 8 / HZ) + +struct kgdb_nmi_tty_priv { + struct tty_port port; + struct tasklet_struct tlet; + STRUCT_KFIFO(char, KGDB_NMI_FIFO_SIZE) fifo; +}; + +static struct kgdb_nmi_tty_priv *kgdb_nmi_port_to_priv(struct tty_port *port) +{ + return container_of(port, struct kgdb_nmi_tty_priv, port); +} + +/* + * Our debugging console is polled in a tasklet, so we'll check for input + * every tick. In HZ-less mode, we should program the next tick. We have + * to use the lowlevel stuff as no locks should be grabbed. + */ +#ifdef CONFIG_HIGH_RES_TIMERS +static void kgdb_tty_poke(void) +{ + tick_program_event(ktime_get(), 0); +} +#else +static inline void kgdb_tty_poke(void) {} +#endif + +static struct tty_port *kgdb_nmi_port; + +static void kgdb_tty_recv(int ch) +{ + struct kgdb_nmi_tty_priv *priv; + char c = ch; + + if (!kgdb_nmi_port || ch < 0) + return; + /* + * Can't use port->tty->driver_data as tty might be not there. Tasklet + * will check for tty and will get the ref, but here we don't have to + * do that, and actually, we can't: we're in NMI context, no locks are + * possible. + */ + priv = kgdb_nmi_port_to_priv(kgdb_nmi_port); + kfifo_in(&priv->fifo, &c, 1); + kgdb_tty_poke(); +} + +static int kgdb_nmi_poll_one_knock(void) +{ + static int n; + int c = -1; + const char *magic = kgdb_nmi_magic; + size_t m = strlen(magic); + bool printch = 0; + + c = dbg_io_ops->read_char(); + if (c == NO_POLL_CHAR) + return c; + + if (!kgdb_nmi_knock && (c == '\r' || c == '\n')) { + return 1; + } else if (c == magic[n]) { + n = (n + 1) % m; + if (!n) + return 1; + printch = 1; + } else { + n = 0; + } + + if (kgdb_nmi_tty_enabled) { + kgdb_tty_recv(c); + return 0; + } + + if (printch) { + kdb_printf("%c", c); + return 0; + } + + kdb_printf("\r%s %s to enter the debugger> %*s", + kgdb_nmi_knock ? "Type" : "Hit", + kgdb_nmi_knock ? magic : "", (int)m, ""); + while (m--) + kdb_printf("\b"); + return 0; +} + +/** + * kgdb_nmi_poll_knock - Check if it is time to enter the debugger + * + * "Serial ports are often noisy, especially when muxed over another port (we + * often use serial over the headset connector). Noise on the async command + * line just causes characters that are ignored, on a command line that blocked + * execution noise would be catastrophic." -- Colin Cross + * + * So, this function implements KGDB/KDB knocking on the serial line: we won't + * enter the debugger until we receive a known magic phrase (which is actually + * "$3#33", known as "escape to KDB" command. There is also a relaxed variant + * of knocking, i.e. just pressing the return key is enough to enter the + * debugger. And if knocking is disabled, the function always returns 1. + */ +bool kgdb_nmi_poll_knock(void) +{ + if (kgdb_nmi_knock < 0) + return 1; + + while (1) { + int ret; + + ret = kgdb_nmi_poll_one_knock(); + if (ret == NO_POLL_CHAR) + return 0; + else if (ret == 1) + break; + } + return 1; +} + +/* + * The tasklet is cheap, it does not cause wakeups when reschedules itself, + * instead it waits for the next tick. + */ +static void kgdb_nmi_tty_receiver(unsigned long data) +{ + struct kgdb_nmi_tty_priv *priv = (void *)data; + struct tty_struct *tty; + char ch; + + tasklet_schedule(&priv->tlet); + + if (likely(!kgdb_nmi_tty_enabled || !kfifo_len(&priv->fifo))) + return; + + /* Port is there, but tty might be hung up, check. */ + tty = tty_port_tty_get(kgdb_nmi_port); + if (!tty) + return; + + while (kfifo_out(&priv->fifo, &ch, 1)) + tty_insert_flip_char(priv->port.tty, ch, TTY_NORMAL); + tty_flip_buffer_push(priv->port.tty); + + tty_kref_put(tty); +} + +static int kgdb_nmi_tty_activate(struct tty_port *port, struct tty_struct *tty) +{ + struct kgdb_nmi_tty_priv *priv = tty->driver_data; + + kgdb_nmi_port = port; + tasklet_schedule(&priv->tlet); + return 0; +} + +static void kgdb_nmi_tty_shutdown(struct tty_port *port) +{ + struct kgdb_nmi_tty_priv *priv = port->tty->driver_data; + + tasklet_kill(&priv->tlet); + kgdb_nmi_port = NULL; +} + +static const struct tty_port_operations kgdb_nmi_tty_port_ops = { + .activate = kgdb_nmi_tty_activate, + .shutdown = kgdb_nmi_tty_shutdown, +}; + +static int kgdb_nmi_tty_install(struct tty_driver *drv, struct tty_struct *tty) +{ + struct kgdb_nmi_tty_priv *priv; + int ret; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + INIT_KFIFO(priv->fifo); + tasklet_init(&priv->tlet, kgdb_nmi_tty_receiver, (unsigned long)priv); + tty_port_init(&priv->port); + priv->port.ops = &kgdb_nmi_tty_port_ops; + tty->driver_data = priv; + + ret = tty_port_install(&priv->port, drv, tty); + if (ret) { + pr_err("%s: can't install tty port: %d\n", __func__, ret); + goto err; + } + return 0; +err: + kfree(priv); + return ret; +} + +static void kgdb_nmi_tty_cleanup(struct tty_struct *tty) +{ + struct kgdb_nmi_tty_priv *priv = tty->driver_data; + + tty->driver_data = NULL; + kfree(priv); +} + +static int kgdb_nmi_tty_open(struct tty_struct *tty, struct file *file) +{ + struct kgdb_nmi_tty_priv *priv = tty->driver_data; + + return tty_port_open(&priv->port, tty, file); +} + +static void kgdb_nmi_tty_close(struct tty_struct *tty, struct file *file) +{ + struct kgdb_nmi_tty_priv *priv = tty->driver_data; + + tty_port_close(&priv->port, tty, file); +} + +static void kgdb_nmi_tty_hangup(struct tty_struct *tty) +{ + struct kgdb_nmi_tty_priv *priv = tty->driver_data; + + tty_port_hangup(&priv->port); +} + +static int kgdb_nmi_tty_write_room(struct tty_struct *tty) +{ + /* Actually, we can handle any amount as we use polled writes. */ + return 2048; +} + +static int kgdb_nmi_tty_write(struct tty_struct *tty, const unchar *buf, int c) +{ + int i; + + for (i = 0; i < c; i++) + dbg_io_ops->write_char(buf[i]); + return c; +} + +static const struct tty_operations kgdb_nmi_tty_ops = { + .open = kgdb_nmi_tty_open, + .close = kgdb_nmi_tty_close, + .install = kgdb_nmi_tty_install, + .cleanup = kgdb_nmi_tty_cleanup, + .hangup = kgdb_nmi_tty_hangup, + .write_room = kgdb_nmi_tty_write_room, + .write = kgdb_nmi_tty_write, +}; + +static int kgdb_nmi_enable_console(int argc, const char *argv[]) +{ + kgdb_nmi_tty_enabled = !(argc == 1 && !strcmp(argv[1], "off")); + return 0; +} + +int kgdb_register_nmi_console(void) +{ + int ret; + + if (!arch_kgdb_ops.enable_nmi) + return 0; + + kgdb_nmi_tty_driver = alloc_tty_driver(1); + if (!kgdb_nmi_tty_driver) { + pr_err("%s: cannot allocate tty\n", __func__); + return -ENOMEM; + } + kgdb_nmi_tty_driver->driver_name = "ttyNMI"; + kgdb_nmi_tty_driver->name = "ttyNMI"; + kgdb_nmi_tty_driver->num = 1; + kgdb_nmi_tty_driver->type = TTY_DRIVER_TYPE_SERIAL; + kgdb_nmi_tty_driver->subtype = SERIAL_TYPE_NORMAL; + kgdb_nmi_tty_driver->flags = TTY_DRIVER_REAL_RAW; + kgdb_nmi_tty_driver->init_termios = tty_std_termios; + tty_termios_encode_baud_rate(&kgdb_nmi_tty_driver->init_termios, + KGDB_NMI_BAUD, KGDB_NMI_BAUD); + tty_set_operations(kgdb_nmi_tty_driver, &kgdb_nmi_tty_ops); + + ret = tty_register_driver(kgdb_nmi_tty_driver); + if (ret) { + pr_err("%s: can't register tty driver: %d\n", __func__, ret); + goto err_drv_reg; + } + + ret = kdb_register("nmi_console", kgdb_nmi_enable_console, "[off]", + "switch to Linux NMI console", 0); + if (ret) { + pr_err("%s: can't register kdb command: %d\n", __func__, ret); + goto err_kdb_reg; + } + + register_console(&kgdb_nmi_console); + arch_kgdb_ops.enable_nmi(1); + + return 0; +err_kdb_reg: + tty_unregister_driver(kgdb_nmi_tty_driver); +err_drv_reg: + put_tty_driver(kgdb_nmi_tty_driver); + return ret; +} +EXPORT_SYMBOL_GPL(kgdb_register_nmi_console); + +int kgdb_unregister_nmi_console(void) +{ + int ret; + + if (!arch_kgdb_ops.enable_nmi) + return 0; + arch_kgdb_ops.enable_nmi(0); + + kdb_unregister("nmi_console"); + + ret = unregister_console(&kgdb_nmi_console); + if (ret) + return ret; + + ret = tty_unregister_driver(kgdb_nmi_tty_driver); + if (ret) + return ret; + put_tty_driver(kgdb_nmi_tty_driver); + + return 0; +} +EXPORT_SYMBOL_GPL(kgdb_unregister_nmi_console); diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c index 2b42a01a81c..3f63d834cbc 100644 --- a/drivers/tty/serial/kgdboc.c +++ b/drivers/tty/serial/kgdboc.c @@ -145,6 +145,8 @@ __setup("kgdboc=", kgdboc_option_setup); static void cleanup_kgdboc(void) { + if (kgdb_unregister_nmi_console()) + return; kgdboc_unregister_kbd(); if (configured == 1) kgdb_unregister_io_module(&kgdboc_io_ops); @@ -198,11 +200,18 @@ do_register: if (err) goto noconfig; + err = kgdb_register_nmi_console(); + if (err) + goto nmi_con_failed; + configured = 1; return 0; +nmi_con_failed: + kgdb_unregister_io_module(&kgdboc_io_ops); noconfig: + kgdboc_unregister_kbd(); config[0] = 0; configured = 0; cleanup_kgdboc(); diff --git a/include/linux/kgdb.h b/include/linux/kgdb.h index 7800cce284d..4dff0c6ed58 100644 --- a/include/linux/kgdb.h +++ b/include/linux/kgdb.h @@ -286,6 +286,16 @@ extern struct kgdb_arch arch_kgdb_ops; extern unsigned long __weak kgdb_arch_pc(int exception, struct pt_regs *regs); +#ifdef CONFIG_SERIAL_KGDB_NMI +extern int kgdb_register_nmi_console(void); +extern int kgdb_unregister_nmi_console(void); +extern bool kgdb_nmi_poll_knock(void); +#else +static inline int kgdb_register_nmi_console(void) { return 0; } +static inline int kgdb_unregister_nmi_console(void) { return 0; } +static inline bool kgdb_nmi_poll_knock(void) { return 1; } +#endif + extern int kgdb_register_io_module(struct kgdb_io *local_kgdb_io_ops); extern void kgdb_unregister_io_module(struct kgdb_io *local_kgdb_io_ops); extern struct kgdb_io *dbg_io_ops;