![Alan Cox](/assets/img/avatar_default.png)
- Stop drivers calling their own flush method indirectly, it obfuscates code and it will change soon anyway - A few more lock_kernel paths temporarily needed in some driver internal waiting code - Remove private put_char method that does a write call for one char - we have that anyway - Most but not yet all of the termios copy under lock fixing (some has other dependencies to follow) - Note a few locking bugs in drivers found in the process - Kill remaining [ab]users of TIOCG/SSOFTCAR in the driver, these must go to fix the termios locking Signed-off-by: Alan Cox <alan@redhat.com> Cc: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1958 lines
48 KiB
C
1958 lines
48 KiB
C
/*
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* nozomi.c -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
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*
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* Written by: Ulf Jakobsson,
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* Jan Åkerfeldt,
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* Stefan Thomasson,
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*
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* Maintained by: Paul Hardwick (p.hardwick@option.com)
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*
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* Patches:
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* Locking code changes for Vodafone by Sphere Systems Ltd,
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* Andrew Bird (ajb@spheresystems.co.uk )
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* & Phil Sanderson
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*
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* Source has been ported from an implementation made by Filip Aben @ Option
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*
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* --------------------------------------------------------------------------
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*
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* Copyright (c) 2005,2006 Option Wireless Sweden AB
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* Copyright (c) 2006 Sphere Systems Ltd
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* Copyright (c) 2006 Option Wireless n/v
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* All rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* --------------------------------------------------------------------------
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*/
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/* Enable this to have a lot of debug printouts */
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#define DEBUG
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/ioport.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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#include <linux/interrupt.h>
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#include <linux/kmod.h>
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#include <linux/init.h>
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#include <linux/kfifo.h>
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#include <linux/uaccess.h>
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#include <asm/byteorder.h>
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#include <linux/delay.h>
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#define VERSION_STRING DRIVER_DESC " 2.1d (build date: " \
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__DATE__ " " __TIME__ ")"
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/* Macros definitions */
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/* Default debug printout level */
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#define NOZOMI_DEBUG_LEVEL 0x00
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#define P_BUF_SIZE 128
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#define NFO(_err_flag_, args...) \
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do { \
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char tmp[P_BUF_SIZE]; \
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snprintf(tmp, sizeof(tmp), ##args); \
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printk(_err_flag_ "[%d] %s(): %s\n", __LINE__, \
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__FUNCTION__, tmp); \
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} while (0)
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#define DBG1(args...) D_(0x01, ##args)
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#define DBG2(args...) D_(0x02, ##args)
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#define DBG3(args...) D_(0x04, ##args)
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#define DBG4(args...) D_(0x08, ##args)
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#define DBG5(args...) D_(0x10, ##args)
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#define DBG6(args...) D_(0x20, ##args)
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#define DBG7(args...) D_(0x40, ##args)
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#define DBG8(args...) D_(0x80, ##args)
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#ifdef DEBUG
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/* Do we need this settable at runtime? */
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static int debug = NOZOMI_DEBUG_LEVEL;
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#define D(lvl, args...) do \
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{if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
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while (0)
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#define D_(lvl, args...) D(lvl, ##args)
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/* These printouts are always printed */
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#else
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static int debug;
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#define D_(lvl, args...)
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#endif
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/* TODO: rewrite to optimize macros... */
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#define TMP_BUF_MAX 256
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#define DUMP(buf__,len__) \
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do { \
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char tbuf[TMP_BUF_MAX] = {0};\
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if (len__ > 1) {\
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snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
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if (tbuf[len__-2] == '\r') {\
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tbuf[len__-2] = 'r';\
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} \
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DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
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} else {\
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DBG1("SENDING: '%s' (%d)", tbuf, len__);\
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} \
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} while (0)
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/* Defines */
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#define NOZOMI_NAME "nozomi"
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#define NOZOMI_NAME_TTY "nozomi_tty"
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#define DRIVER_DESC "Nozomi driver"
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#define NTTY_TTY_MAXMINORS 256
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#define NTTY_FIFO_BUFFER_SIZE 8192
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/* Must be power of 2 */
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#define FIFO_BUFFER_SIZE_UL 8192
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/* Size of tmp send buffer to card */
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#define SEND_BUF_MAX 1024
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#define RECEIVE_BUF_MAX 4
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/* Define all types of vendors and devices to support */
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#define VENDOR1 0x1931 /* Vendor Option */
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#define DEVICE1 0x000c /* HSDPA card */
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#define R_IIR 0x0000 /* Interrupt Identity Register */
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#define R_FCR 0x0000 /* Flow Control Register */
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#define R_IER 0x0004 /* Interrupt Enable Register */
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#define CONFIG_MAGIC 0xEFEFFEFE
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#define TOGGLE_VALID 0x0000
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/* Definition of interrupt tokens */
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#define MDM_DL1 0x0001
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#define MDM_UL1 0x0002
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#define MDM_DL2 0x0004
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#define MDM_UL2 0x0008
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#define DIAG_DL1 0x0010
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#define DIAG_DL2 0x0020
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#define DIAG_UL 0x0040
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#define APP1_DL 0x0080
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#define APP1_UL 0x0100
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#define APP2_DL 0x0200
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#define APP2_UL 0x0400
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#define CTRL_DL 0x0800
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#define CTRL_UL 0x1000
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#define RESET 0x8000
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#define MDM_DL (MDM_DL1 | MDM_DL2)
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#define MDM_UL (MDM_UL1 | MDM_UL2)
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#define DIAG_DL (DIAG_DL1 | DIAG_DL2)
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/* modem signal definition */
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#define CTRL_DSR 0x0001
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#define CTRL_DCD 0x0002
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#define CTRL_RI 0x0004
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#define CTRL_CTS 0x0008
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#define CTRL_DTR 0x0001
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#define CTRL_RTS 0x0002
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#define MAX_PORT 4
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#define NOZOMI_MAX_PORTS 5
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#define NOZOMI_MAX_CARDS (NTTY_TTY_MAXMINORS / MAX_PORT)
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/* Type definitions */
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/*
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* There are two types of nozomi cards,
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* one with 2048 memory and with 8192 memory
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*/
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enum card_type {
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F32_2 = 2048, /* 512 bytes downlink + uplink * 2 -> 2048 */
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F32_8 = 8192, /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
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};
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/* Initialization states a card can be in */
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enum card_state {
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NOZOMI_STATE_UKNOWN = 0,
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NOZOMI_STATE_ENABLED = 1, /* pci device enabled */
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NOZOMI_STATE_ALLOCATED = 2, /* config setup done */
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NOZOMI_STATE_READY = 3, /* flowcontrols received */
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};
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/* Two different toggle channels exist */
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enum channel_type {
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CH_A = 0,
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CH_B = 1,
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};
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/* Port definition for the card regarding flow control */
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enum ctrl_port_type {
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CTRL_CMD = 0,
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CTRL_MDM = 1,
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CTRL_DIAG = 2,
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CTRL_APP1 = 3,
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CTRL_APP2 = 4,
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CTRL_ERROR = -1,
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};
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/* Ports that the nozomi has */
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enum port_type {
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PORT_MDM = 0,
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PORT_DIAG = 1,
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PORT_APP1 = 2,
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PORT_APP2 = 3,
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PORT_CTRL = 4,
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PORT_ERROR = -1,
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};
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#ifdef __BIG_ENDIAN
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/* Big endian */
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struct toggles {
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unsigned int enabled:5; /*
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* Toggle fields are valid if enabled is 0,
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* else A-channels must always be used.
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*/
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unsigned int diag_dl:1;
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unsigned int mdm_dl:1;
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unsigned int mdm_ul:1;
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} __attribute__ ((packed));
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/* Configuration table to read at startup of card */
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/* Is for now only needed during initialization phase */
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struct config_table {
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u32 signature;
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u16 product_information;
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u16 version;
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u8 pad3[3];
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struct toggles toggle;
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u8 pad1[4];
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u16 dl_mdm_len1; /*
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* If this is 64, it can hold
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* 60 bytes + 4 that is length field
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*/
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u16 dl_start;
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u16 dl_diag_len1;
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u16 dl_mdm_len2; /*
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* If this is 64, it can hold
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* 60 bytes + 4 that is length field
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*/
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u16 dl_app1_len;
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u16 dl_diag_len2;
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u16 dl_ctrl_len;
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u16 dl_app2_len;
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u8 pad2[16];
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u16 ul_mdm_len1;
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u16 ul_start;
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u16 ul_diag_len;
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u16 ul_mdm_len2;
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u16 ul_app1_len;
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u16 ul_app2_len;
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u16 ul_ctrl_len;
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} __attribute__ ((packed));
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/* This stores all control downlink flags */
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struct ctrl_dl {
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u8 port;
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unsigned int reserved:4;
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unsigned int CTS:1;
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unsigned int RI:1;
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unsigned int DCD:1;
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unsigned int DSR:1;
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} __attribute__ ((packed));
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/* This stores all control uplink flags */
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struct ctrl_ul {
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u8 port;
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unsigned int reserved:6;
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unsigned int RTS:1;
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unsigned int DTR:1;
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} __attribute__ ((packed));
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#else
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/* Little endian */
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/* This represents the toggle information */
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struct toggles {
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unsigned int mdm_ul:1;
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unsigned int mdm_dl:1;
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unsigned int diag_dl:1;
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unsigned int enabled:5; /*
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* Toggle fields are valid if enabled is 0,
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* else A-channels must always be used.
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*/
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} __attribute__ ((packed));
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/* Configuration table to read at startup of card */
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struct config_table {
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u32 signature;
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u16 version;
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u16 product_information;
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struct toggles toggle;
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u8 pad1[7];
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u16 dl_start;
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u16 dl_mdm_len1; /*
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* If this is 64, it can hold
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* 60 bytes + 4 that is length field
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*/
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u16 dl_mdm_len2;
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u16 dl_diag_len1;
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u16 dl_diag_len2;
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u16 dl_app1_len;
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u16 dl_app2_len;
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u16 dl_ctrl_len;
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u8 pad2[16];
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u16 ul_start;
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u16 ul_mdm_len2;
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u16 ul_mdm_len1;
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u16 ul_diag_len;
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u16 ul_app1_len;
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u16 ul_app2_len;
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u16 ul_ctrl_len;
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} __attribute__ ((packed));
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/* This stores all control downlink flags */
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struct ctrl_dl {
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unsigned int DSR:1;
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unsigned int DCD:1;
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unsigned int RI:1;
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unsigned int CTS:1;
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unsigned int reserverd:4;
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u8 port;
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} __attribute__ ((packed));
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/* This stores all control uplink flags */
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struct ctrl_ul {
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unsigned int DTR:1;
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unsigned int RTS:1;
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unsigned int reserved:6;
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u8 port;
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} __attribute__ ((packed));
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#endif
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/* This holds all information that is needed regarding a port */
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struct port {
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u8 update_flow_control;
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struct ctrl_ul ctrl_ul;
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struct ctrl_dl ctrl_dl;
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struct kfifo *fifo_ul;
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void __iomem *dl_addr[2];
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u32 dl_size[2];
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u8 toggle_dl;
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void __iomem *ul_addr[2];
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u32 ul_size[2];
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u8 toggle_ul;
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u16 token_dl;
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struct tty_struct *tty;
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int tty_open_count;
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/* mutex to ensure one access patch to this port */
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struct mutex tty_sem;
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wait_queue_head_t tty_wait;
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struct async_icount tty_icount;
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};
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/* Private data one for each card in the system */
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struct nozomi {
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void __iomem *base_addr;
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unsigned long flip;
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/* Pointers to registers */
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void __iomem *reg_iir;
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void __iomem *reg_fcr;
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void __iomem *reg_ier;
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u16 last_ier;
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enum card_type card_type;
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struct config_table config_table; /* Configuration table */
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struct pci_dev *pdev;
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struct port port[NOZOMI_MAX_PORTS];
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u8 *send_buf;
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spinlock_t spin_mutex; /* secures access to registers and tty */
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unsigned int index_start;
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enum card_state state;
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u32 open_ttys;
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};
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/* This is a data packet that is read or written to/from card */
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struct buffer {
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u32 size; /* size is the length of the data buffer */
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u8 *data;
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} __attribute__ ((packed));
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/* Global variables */
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static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
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{PCI_DEVICE(VENDOR1, DEVICE1)},
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{},
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};
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MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
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static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
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static struct tty_driver *ntty_driver;
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/*
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* find card by tty_index
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*/
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static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
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{
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return tty ? ndevs[tty->index / MAX_PORT] : NULL;
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}
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static inline struct port *get_port_by_tty(const struct tty_struct *tty)
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{
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struct nozomi *ndev = get_dc_by_tty(tty);
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return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
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}
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/*
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* TODO:
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* -Optimize
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* -Rewrite cleaner
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*/
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static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
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u32 size_bytes)
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{
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u32 i = 0;
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const u32 __iomem *ptr = mem_addr_start;
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u16 *buf16;
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if (unlikely(!ptr || !buf))
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goto out;
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/* shortcut for extremely often used cases */
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switch (size_bytes) {
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case 2: /* 2 bytes */
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buf16 = (u16 *) buf;
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*buf16 = __le16_to_cpu(readw(ptr));
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goto out;
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break;
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case 4: /* 4 bytes */
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*(buf) = __le32_to_cpu(readl(ptr));
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goto out;
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break;
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}
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while (i < size_bytes) {
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if (size_bytes - i == 2) {
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/* Handle 2 bytes in the end */
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buf16 = (u16 *) buf;
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*(buf16) = __le16_to_cpu(readw(ptr));
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i += 2;
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} else {
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/* Read 4 bytes */
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*(buf) = __le32_to_cpu(readl(ptr));
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i += 4;
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}
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buf++;
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ptr++;
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}
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out:
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return;
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}
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/*
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* TODO:
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* -Optimize
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* -Rewrite cleaner
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*/
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static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
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u32 size_bytes)
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{
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u32 i = 0;
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u32 __iomem *ptr = mem_addr_start;
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const u16 *buf16;
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if (unlikely(!ptr || !buf))
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return 0;
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/* shortcut for extremely often used cases */
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switch (size_bytes) {
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case 2: /* 2 bytes */
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buf16 = (const u16 *)buf;
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writew(__cpu_to_le16(*buf16), ptr);
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return 2;
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break;
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case 1: /*
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* also needs to write 4 bytes in this case
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* so falling through..
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*/
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case 4: /* 4 bytes */
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writel(__cpu_to_le32(*buf), ptr);
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return 4;
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break;
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}
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while (i < size_bytes) {
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if (size_bytes - i == 2) {
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/* 2 bytes */
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buf16 = (const u16 *)buf;
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writew(__cpu_to_le16(*buf16), ptr);
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i += 2;
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} else {
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/* 4 bytes */
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writel(__cpu_to_le32(*buf), ptr);
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i += 4;
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}
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buf++;
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ptr++;
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}
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return i;
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}
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/* Setup pointers to different channels and also setup buffer sizes. */
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static void setup_memory(struct nozomi *dc)
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{
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void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
|
|
/* The length reported is including the length field of 4 bytes,
|
|
* hence subtract with 4.
|
|
*/
|
|
const u16 buff_offset = 4;
|
|
|
|
/* Modem port dl configuration */
|
|
dc->port[PORT_MDM].dl_addr[CH_A] = offset;
|
|
dc->port[PORT_MDM].dl_addr[CH_B] =
|
|
(offset += dc->config_table.dl_mdm_len1);
|
|
dc->port[PORT_MDM].dl_size[CH_A] =
|
|
dc->config_table.dl_mdm_len1 - buff_offset;
|
|
dc->port[PORT_MDM].dl_size[CH_B] =
|
|
dc->config_table.dl_mdm_len2 - buff_offset;
|
|
|
|
/* Diag port dl configuration */
|
|
dc->port[PORT_DIAG].dl_addr[CH_A] =
|
|
(offset += dc->config_table.dl_mdm_len2);
|
|
dc->port[PORT_DIAG].dl_size[CH_A] =
|
|
dc->config_table.dl_diag_len1 - buff_offset;
|
|
dc->port[PORT_DIAG].dl_addr[CH_B] =
|
|
(offset += dc->config_table.dl_diag_len1);
|
|
dc->port[PORT_DIAG].dl_size[CH_B] =
|
|
dc->config_table.dl_diag_len2 - buff_offset;
|
|
|
|
/* App1 port dl configuration */
|
|
dc->port[PORT_APP1].dl_addr[CH_A] =
|
|
(offset += dc->config_table.dl_diag_len2);
|
|
dc->port[PORT_APP1].dl_size[CH_A] =
|
|
dc->config_table.dl_app1_len - buff_offset;
|
|
|
|
/* App2 port dl configuration */
|
|
dc->port[PORT_APP2].dl_addr[CH_A] =
|
|
(offset += dc->config_table.dl_app1_len);
|
|
dc->port[PORT_APP2].dl_size[CH_A] =
|
|
dc->config_table.dl_app2_len - buff_offset;
|
|
|
|
/* Ctrl dl configuration */
|
|
dc->port[PORT_CTRL].dl_addr[CH_A] =
|
|
(offset += dc->config_table.dl_app2_len);
|
|
dc->port[PORT_CTRL].dl_size[CH_A] =
|
|
dc->config_table.dl_ctrl_len - buff_offset;
|
|
|
|
offset = dc->base_addr + dc->config_table.ul_start;
|
|
|
|
/* Modem Port ul configuration */
|
|
dc->port[PORT_MDM].ul_addr[CH_A] = offset;
|
|
dc->port[PORT_MDM].ul_size[CH_A] =
|
|
dc->config_table.ul_mdm_len1 - buff_offset;
|
|
dc->port[PORT_MDM].ul_addr[CH_B] =
|
|
(offset += dc->config_table.ul_mdm_len1);
|
|
dc->port[PORT_MDM].ul_size[CH_B] =
|
|
dc->config_table.ul_mdm_len2 - buff_offset;
|
|
|
|
/* Diag port ul configuration */
|
|
dc->port[PORT_DIAG].ul_addr[CH_A] =
|
|
(offset += dc->config_table.ul_mdm_len2);
|
|
dc->port[PORT_DIAG].ul_size[CH_A] =
|
|
dc->config_table.ul_diag_len - buff_offset;
|
|
|
|
/* App1 port ul configuration */
|
|
dc->port[PORT_APP1].ul_addr[CH_A] =
|
|
(offset += dc->config_table.ul_diag_len);
|
|
dc->port[PORT_APP1].ul_size[CH_A] =
|
|
dc->config_table.ul_app1_len - buff_offset;
|
|
|
|
/* App2 port ul configuration */
|
|
dc->port[PORT_APP2].ul_addr[CH_A] =
|
|
(offset += dc->config_table.ul_app1_len);
|
|
dc->port[PORT_APP2].ul_size[CH_A] =
|
|
dc->config_table.ul_app2_len - buff_offset;
|
|
|
|
/* Ctrl ul configuration */
|
|
dc->port[PORT_CTRL].ul_addr[CH_A] =
|
|
(offset += dc->config_table.ul_app2_len);
|
|
dc->port[PORT_CTRL].ul_size[CH_A] =
|
|
dc->config_table.ul_ctrl_len - buff_offset;
|
|
}
|
|
|
|
/* Dump config table under initalization phase */
|
|
#ifdef DEBUG
|
|
static void dump_table(const struct nozomi *dc)
|
|
{
|
|
DBG3("signature: 0x%08X", dc->config_table.signature);
|
|
DBG3("version: 0x%04X", dc->config_table.version);
|
|
DBG3("product_information: 0x%04X", \
|
|
dc->config_table.product_information);
|
|
DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
|
|
DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
|
|
DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
|
|
DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
|
|
|
|
DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
|
|
DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
|
|
dc->config_table.dl_mdm_len1);
|
|
DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
|
|
dc->config_table.dl_mdm_len2);
|
|
DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
|
|
dc->config_table.dl_diag_len1);
|
|
DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
|
|
dc->config_table.dl_diag_len2);
|
|
DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
|
|
dc->config_table.dl_app1_len);
|
|
DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
|
|
dc->config_table.dl_app2_len);
|
|
DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
|
|
dc->config_table.dl_ctrl_len);
|
|
DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
|
|
dc->config_table.ul_start);
|
|
DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
|
|
dc->config_table.ul_mdm_len1);
|
|
DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
|
|
dc->config_table.ul_mdm_len2);
|
|
DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
|
|
dc->config_table.ul_diag_len);
|
|
DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
|
|
dc->config_table.ul_app1_len);
|
|
DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
|
|
dc->config_table.ul_app2_len);
|
|
DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
|
|
dc->config_table.ul_ctrl_len);
|
|
}
|
|
#else
|
|
static inline void dump_table(const struct nozomi *dc) { }
|
|
#endif
|
|
|
|
/*
|
|
* Read configuration table from card under intalization phase
|
|
* Returns 1 if ok, else 0
|
|
*/
|
|
static int nozomi_read_config_table(struct nozomi *dc)
|
|
{
|
|
read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
|
|
sizeof(struct config_table));
|
|
|
|
if (dc->config_table.signature != CONFIG_MAGIC) {
|
|
dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
|
|
dc->config_table.signature, CONFIG_MAGIC);
|
|
return 0;
|
|
}
|
|
|
|
if ((dc->config_table.version == 0)
|
|
|| (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
|
|
int i;
|
|
DBG1("Second phase, configuring card");
|
|
|
|
setup_memory(dc);
|
|
|
|
dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
|
|
dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
|
|
dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
|
|
DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
|
|
dc->port[PORT_MDM].toggle_ul,
|
|
dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
|
|
|
|
dump_table(dc);
|
|
|
|
for (i = PORT_MDM; i < MAX_PORT; i++) {
|
|
dc->port[i].fifo_ul =
|
|
kfifo_alloc(FIFO_BUFFER_SIZE_UL, GFP_ATOMIC, NULL);
|
|
memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
|
|
memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
|
|
}
|
|
|
|
/* Enable control channel */
|
|
dc->last_ier = dc->last_ier | CTRL_DL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
|
|
dc->state = NOZOMI_STATE_ALLOCATED;
|
|
dev_info(&dc->pdev->dev, "Initialization OK!\n");
|
|
return 1;
|
|
}
|
|
|
|
if ((dc->config_table.version > 0)
|
|
&& (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
|
|
u32 offset = 0;
|
|
DBG1("First phase: pushing upload buffers, clearing download");
|
|
|
|
dev_info(&dc->pdev->dev, "Version of card: %d\n",
|
|
dc->config_table.version);
|
|
|
|
/* Here we should disable all I/O over F32. */
|
|
setup_memory(dc);
|
|
|
|
/*
|
|
* We should send ALL channel pair tokens back along
|
|
* with reset token
|
|
*/
|
|
|
|
/* push upload modem buffers */
|
|
write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
|
|
(u32 *) &offset, 4);
|
|
write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
|
|
(u32 *) &offset, 4);
|
|
|
|
writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
|
|
|
|
DBG1("First phase done");
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Enable uplink interrupts */
|
|
static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
|
|
{
|
|
static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
|
|
|
|
if (port < NOZOMI_MAX_PORTS) {
|
|
dc->last_ier |= mask[port];
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
} else {
|
|
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
|
|
}
|
|
}
|
|
|
|
/* Disable uplink interrupts */
|
|
static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
|
|
{
|
|
static const u16 mask[] =
|
|
{~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
|
|
|
|
if (port < NOZOMI_MAX_PORTS) {
|
|
dc->last_ier &= mask[port];
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
} else {
|
|
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
|
|
}
|
|
}
|
|
|
|
/* Enable downlink interrupts */
|
|
static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
|
|
{
|
|
static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
|
|
|
|
if (port < NOZOMI_MAX_PORTS) {
|
|
dc->last_ier |= mask[port];
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
} else {
|
|
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
|
|
}
|
|
}
|
|
|
|
/* Disable downlink interrupts */
|
|
static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
|
|
{
|
|
static const u16 mask[] =
|
|
{~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
|
|
|
|
if (port < NOZOMI_MAX_PORTS) {
|
|
dc->last_ier &= mask[port];
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
} else {
|
|
dev_err(&dc->pdev->dev, "Called with wrong port?\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Return 1 - send buffer to card and ack.
|
|
* Return 0 - don't ack, don't send buffer to card.
|
|
*/
|
|
static int send_data(enum port_type index, const struct nozomi *dc)
|
|
{
|
|
u32 size = 0;
|
|
const struct port *port = &dc->port[index];
|
|
const u8 toggle = port->toggle_ul;
|
|
void __iomem *addr = port->ul_addr[toggle];
|
|
const u32 ul_size = port->ul_size[toggle];
|
|
struct tty_struct *tty = port->tty;
|
|
|
|
/* Get data from tty and place in buf for now */
|
|
size = __kfifo_get(port->fifo_ul, dc->send_buf,
|
|
ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
|
|
|
|
if (size == 0) {
|
|
DBG4("No more data to send, disable link:");
|
|
return 0;
|
|
}
|
|
|
|
/* DUMP(buf, size); */
|
|
|
|
/* Write length + data */
|
|
write_mem32(addr, (u32 *) &size, 4);
|
|
write_mem32(addr + 4, (u32 *) dc->send_buf, size);
|
|
|
|
if (tty)
|
|
tty_wakeup(tty);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* If all data has been read, return 1, else 0 */
|
|
static int receive_data(enum port_type index, struct nozomi *dc)
|
|
{
|
|
u8 buf[RECEIVE_BUF_MAX] = { 0 };
|
|
int size;
|
|
u32 offset = 4;
|
|
struct port *port = &dc->port[index];
|
|
void __iomem *addr = port->dl_addr[port->toggle_dl];
|
|
struct tty_struct *tty = port->tty;
|
|
int i;
|
|
|
|
if (unlikely(!tty)) {
|
|
DBG1("tty not open for port: %d?", index);
|
|
return 1;
|
|
}
|
|
|
|
read_mem32((u32 *) &size, addr, 4);
|
|
/* DBG1( "%d bytes port: %d", size, index); */
|
|
|
|
if (test_bit(TTY_THROTTLED, &tty->flags)) {
|
|
DBG1("No room in tty, don't read data, don't ack interrupt, "
|
|
"disable interrupt");
|
|
|
|
/* disable interrupt in downlink... */
|
|
disable_transmit_dl(index, dc);
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(size == 0)) {
|
|
dev_err(&dc->pdev->dev, "size == 0?\n");
|
|
return 1;
|
|
}
|
|
|
|
tty_buffer_request_room(tty, size);
|
|
|
|
while (size > 0) {
|
|
read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
|
|
|
|
if (size == 1) {
|
|
tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
|
|
size = 0;
|
|
} else if (size < RECEIVE_BUF_MAX) {
|
|
size -= tty_insert_flip_string(tty, (char *) buf, size);
|
|
} else {
|
|
i = tty_insert_flip_string(tty, \
|
|
(char *) buf, RECEIVE_BUF_MAX);
|
|
size -= i;
|
|
offset += i;
|
|
}
|
|
}
|
|
|
|
set_bit(index, &dc->flip);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* Debug for interrupts */
|
|
#ifdef DEBUG
|
|
static char *interrupt2str(u16 interrupt)
|
|
{
|
|
static char buf[TMP_BUF_MAX];
|
|
char *p = buf;
|
|
|
|
interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
|
|
interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"MDM_DL2 ") : NULL;
|
|
|
|
interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"MDM_UL1 ") : NULL;
|
|
interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"MDM_UL2 ") : NULL;
|
|
|
|
interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"DIAG_DL1 ") : NULL;
|
|
interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"DIAG_DL2 ") : NULL;
|
|
|
|
interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"DIAG_UL ") : NULL;
|
|
|
|
interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"APP1_DL ") : NULL;
|
|
interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"APP2_DL ") : NULL;
|
|
|
|
interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"APP1_UL ") : NULL;
|
|
interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"APP2_UL ") : NULL;
|
|
|
|
interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"CTRL_DL ") : NULL;
|
|
interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"CTRL_UL ") : NULL;
|
|
|
|
interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
|
|
"RESET ") : NULL;
|
|
|
|
return buf;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Receive flow control
|
|
* Return 1 - If ok, else 0
|
|
*/
|
|
static int receive_flow_control(struct nozomi *dc)
|
|
{
|
|
enum port_type port = PORT_MDM;
|
|
struct ctrl_dl ctrl_dl;
|
|
struct ctrl_dl old_ctrl;
|
|
u16 enable_ier = 0;
|
|
|
|
read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
|
|
|
|
switch (ctrl_dl.port) {
|
|
case CTRL_CMD:
|
|
DBG1("The Base Band sends this value as a response to a "
|
|
"request for IMSI detach sent over the control "
|
|
"channel uplink (see section 7.6.1).");
|
|
break;
|
|
case CTRL_MDM:
|
|
port = PORT_MDM;
|
|
enable_ier = MDM_DL;
|
|
break;
|
|
case CTRL_DIAG:
|
|
port = PORT_DIAG;
|
|
enable_ier = DIAG_DL;
|
|
break;
|
|
case CTRL_APP1:
|
|
port = PORT_APP1;
|
|
enable_ier = APP1_DL;
|
|
break;
|
|
case CTRL_APP2:
|
|
port = PORT_APP2;
|
|
enable_ier = APP2_DL;
|
|
if (dc->state == NOZOMI_STATE_ALLOCATED) {
|
|
/*
|
|
* After card initialization the flow control
|
|
* received for APP2 is always the last
|
|
*/
|
|
dc->state = NOZOMI_STATE_READY;
|
|
dev_info(&dc->pdev->dev, "Device READY!\n");
|
|
}
|
|
break;
|
|
default:
|
|
dev_err(&dc->pdev->dev,
|
|
"ERROR: flow control received for non-existing port\n");
|
|
return 0;
|
|
};
|
|
|
|
DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
|
|
*((u16 *)&ctrl_dl));
|
|
|
|
old_ctrl = dc->port[port].ctrl_dl;
|
|
dc->port[port].ctrl_dl = ctrl_dl;
|
|
|
|
if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
|
|
DBG1("Disable interrupt (0x%04X) on port: %d",
|
|
enable_ier, port);
|
|
disable_transmit_ul(port, dc);
|
|
|
|
} else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
|
|
|
|
if (__kfifo_len(dc->port[port].fifo_ul)) {
|
|
DBG1("Enable interrupt (0x%04X) on port: %d",
|
|
enable_ier, port);
|
|
DBG1("Data in buffer [%d], enable transmit! ",
|
|
__kfifo_len(dc->port[port].fifo_ul));
|
|
enable_transmit_ul(port, dc);
|
|
} else {
|
|
DBG1("No data in buffer...");
|
|
}
|
|
}
|
|
|
|
if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
|
|
DBG1(" No change in mctrl");
|
|
return 1;
|
|
}
|
|
/* Update statistics */
|
|
if (old_ctrl.CTS != ctrl_dl.CTS)
|
|
dc->port[port].tty_icount.cts++;
|
|
if (old_ctrl.DSR != ctrl_dl.DSR)
|
|
dc->port[port].tty_icount.dsr++;
|
|
if (old_ctrl.RI != ctrl_dl.RI)
|
|
dc->port[port].tty_icount.rng++;
|
|
if (old_ctrl.DCD != ctrl_dl.DCD)
|
|
dc->port[port].tty_icount.dcd++;
|
|
|
|
wake_up_interruptible(&dc->port[port].tty_wait);
|
|
|
|
DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
|
|
port,
|
|
dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
|
|
dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static enum ctrl_port_type port2ctrl(enum port_type port,
|
|
const struct nozomi *dc)
|
|
{
|
|
switch (port) {
|
|
case PORT_MDM:
|
|
return CTRL_MDM;
|
|
case PORT_DIAG:
|
|
return CTRL_DIAG;
|
|
case PORT_APP1:
|
|
return CTRL_APP1;
|
|
case PORT_APP2:
|
|
return CTRL_APP2;
|
|
default:
|
|
dev_err(&dc->pdev->dev,
|
|
"ERROR: send flow control " \
|
|
"received for non-existing port\n");
|
|
};
|
|
return CTRL_ERROR;
|
|
}
|
|
|
|
/*
|
|
* Send flow control, can only update one channel at a time
|
|
* Return 0 - If we have updated all flow control
|
|
* Return 1 - If we need to update more flow control, ack current enable more
|
|
*/
|
|
static int send_flow_control(struct nozomi *dc)
|
|
{
|
|
u32 i, more_flow_control_to_be_updated = 0;
|
|
u16 *ctrl;
|
|
|
|
for (i = PORT_MDM; i < MAX_PORT; i++) {
|
|
if (dc->port[i].update_flow_control) {
|
|
if (more_flow_control_to_be_updated) {
|
|
/* We have more flow control to be updated */
|
|
return 1;
|
|
}
|
|
dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
|
|
ctrl = (u16 *)&dc->port[i].ctrl_ul;
|
|
write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
|
|
(u32 *) ctrl, 2);
|
|
dc->port[i].update_flow_control = 0;
|
|
more_flow_control_to_be_updated = 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Handle downlink data, ports that are handled are modem and diagnostics
|
|
* Return 1 - ok
|
|
* Return 0 - toggle fields are out of sync
|
|
*/
|
|
static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
|
|
u16 read_iir, u16 mask1, u16 mask2)
|
|
{
|
|
if (*toggle == 0 && read_iir & mask1) {
|
|
if (receive_data(port, dc)) {
|
|
writew(mask1, dc->reg_fcr);
|
|
*toggle = !(*toggle);
|
|
}
|
|
|
|
if (read_iir & mask2) {
|
|
if (receive_data(port, dc)) {
|
|
writew(mask2, dc->reg_fcr);
|
|
*toggle = !(*toggle);
|
|
}
|
|
}
|
|
} else if (*toggle == 1 && read_iir & mask2) {
|
|
if (receive_data(port, dc)) {
|
|
writew(mask2, dc->reg_fcr);
|
|
*toggle = !(*toggle);
|
|
}
|
|
|
|
if (read_iir & mask1) {
|
|
if (receive_data(port, dc)) {
|
|
writew(mask1, dc->reg_fcr);
|
|
*toggle = !(*toggle);
|
|
}
|
|
}
|
|
} else {
|
|
dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
|
|
*toggle);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Handle uplink data, this is currently for the modem port
|
|
* Return 1 - ok
|
|
* Return 0 - toggle field are out of sync
|
|
*/
|
|
static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
|
|
{
|
|
u8 *toggle = &(dc->port[port].toggle_ul);
|
|
|
|
if (*toggle == 0 && read_iir & MDM_UL1) {
|
|
dc->last_ier &= ~MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(port, dc)) {
|
|
writew(MDM_UL1, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
*toggle = !*toggle;
|
|
}
|
|
|
|
if (read_iir & MDM_UL2) {
|
|
dc->last_ier &= ~MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(port, dc)) {
|
|
writew(MDM_UL2, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
*toggle = !*toggle;
|
|
}
|
|
}
|
|
|
|
} else if (*toggle == 1 && read_iir & MDM_UL2) {
|
|
dc->last_ier &= ~MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(port, dc)) {
|
|
writew(MDM_UL2, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
*toggle = !*toggle;
|
|
}
|
|
|
|
if (read_iir & MDM_UL1) {
|
|
dc->last_ier &= ~MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(port, dc)) {
|
|
writew(MDM_UL1, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | MDM_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
*toggle = !*toggle;
|
|
}
|
|
}
|
|
} else {
|
|
writew(read_iir & MDM_UL, dc->reg_fcr);
|
|
dev_err(&dc->pdev->dev, "port out of sync!\n");
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static irqreturn_t interrupt_handler(int irq, void *dev_id)
|
|
{
|
|
struct nozomi *dc = dev_id;
|
|
unsigned int a;
|
|
u16 read_iir;
|
|
|
|
if (!dc)
|
|
return IRQ_NONE;
|
|
|
|
spin_lock(&dc->spin_mutex);
|
|
read_iir = readw(dc->reg_iir);
|
|
|
|
/* Card removed */
|
|
if (read_iir == (u16)-1)
|
|
goto none;
|
|
/*
|
|
* Just handle interrupt enabled in IER
|
|
* (by masking with dc->last_ier)
|
|
*/
|
|
read_iir &= dc->last_ier;
|
|
|
|
if (read_iir == 0)
|
|
goto none;
|
|
|
|
|
|
DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
|
|
dc->last_ier);
|
|
|
|
if (read_iir & RESET) {
|
|
if (unlikely(!nozomi_read_config_table(dc))) {
|
|
dc->last_ier = 0x0;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
dev_err(&dc->pdev->dev, "Could not read status from "
|
|
"card, we should disable interface\n");
|
|
} else {
|
|
writew(RESET, dc->reg_fcr);
|
|
}
|
|
/* No more useful info if this was the reset interrupt. */
|
|
goto exit_handler;
|
|
}
|
|
if (read_iir & CTRL_UL) {
|
|
DBG1("CTRL_UL");
|
|
dc->last_ier &= ~CTRL_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_flow_control(dc)) {
|
|
writew(CTRL_UL, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | CTRL_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
}
|
|
}
|
|
if (read_iir & CTRL_DL) {
|
|
receive_flow_control(dc);
|
|
writew(CTRL_DL, dc->reg_fcr);
|
|
}
|
|
if (read_iir & MDM_DL) {
|
|
if (!handle_data_dl(dc, PORT_MDM,
|
|
&(dc->port[PORT_MDM].toggle_dl), read_iir,
|
|
MDM_DL1, MDM_DL2)) {
|
|
dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
|
|
goto exit_handler;
|
|
}
|
|
}
|
|
if (read_iir & MDM_UL) {
|
|
if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
|
|
dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
|
|
goto exit_handler;
|
|
}
|
|
}
|
|
if (read_iir & DIAG_DL) {
|
|
if (!handle_data_dl(dc, PORT_DIAG,
|
|
&(dc->port[PORT_DIAG].toggle_dl), read_iir,
|
|
DIAG_DL1, DIAG_DL2)) {
|
|
dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
|
|
goto exit_handler;
|
|
}
|
|
}
|
|
if (read_iir & DIAG_UL) {
|
|
dc->last_ier &= ~DIAG_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(PORT_DIAG, dc)) {
|
|
writew(DIAG_UL, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | DIAG_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
}
|
|
}
|
|
if (read_iir & APP1_DL) {
|
|
if (receive_data(PORT_APP1, dc))
|
|
writew(APP1_DL, dc->reg_fcr);
|
|
}
|
|
if (read_iir & APP1_UL) {
|
|
dc->last_ier &= ~APP1_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(PORT_APP1, dc)) {
|
|
writew(APP1_UL, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | APP1_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
}
|
|
}
|
|
if (read_iir & APP2_DL) {
|
|
if (receive_data(PORT_APP2, dc))
|
|
writew(APP2_DL, dc->reg_fcr);
|
|
}
|
|
if (read_iir & APP2_UL) {
|
|
dc->last_ier &= ~APP2_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
if (send_data(PORT_APP2, dc)) {
|
|
writew(APP2_UL, dc->reg_fcr);
|
|
dc->last_ier = dc->last_ier | APP2_UL;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
}
|
|
}
|
|
|
|
exit_handler:
|
|
spin_unlock(&dc->spin_mutex);
|
|
for (a = 0; a < NOZOMI_MAX_PORTS; a++)
|
|
if (test_and_clear_bit(a, &dc->flip))
|
|
tty_flip_buffer_push(dc->port[a].tty);
|
|
return IRQ_HANDLED;
|
|
none:
|
|
spin_unlock(&dc->spin_mutex);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static void nozomi_get_card_type(struct nozomi *dc)
|
|
{
|
|
int i;
|
|
u32 size = 0;
|
|
|
|
for (i = 0; i < 6; i++)
|
|
size += pci_resource_len(dc->pdev, i);
|
|
|
|
/* Assume card type F32_8 if no match */
|
|
dc->card_type = size == 2048 ? F32_2 : F32_8;
|
|
|
|
dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
|
|
}
|
|
|
|
static void nozomi_setup_private_data(struct nozomi *dc)
|
|
{
|
|
void __iomem *offset = dc->base_addr + dc->card_type / 2;
|
|
unsigned int i;
|
|
|
|
dc->reg_fcr = (void __iomem *)(offset + R_FCR);
|
|
dc->reg_iir = (void __iomem *)(offset + R_IIR);
|
|
dc->reg_ier = (void __iomem *)(offset + R_IER);
|
|
dc->last_ier = 0;
|
|
dc->flip = 0;
|
|
|
|
dc->port[PORT_MDM].token_dl = MDM_DL;
|
|
dc->port[PORT_DIAG].token_dl = DIAG_DL;
|
|
dc->port[PORT_APP1].token_dl = APP1_DL;
|
|
dc->port[PORT_APP2].token_dl = APP2_DL;
|
|
|
|
for (i = 0; i < MAX_PORT; i++)
|
|
init_waitqueue_head(&dc->port[i].tty_wait);
|
|
}
|
|
|
|
static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
|
|
|
|
return sprintf(buf, "%d\n", dc->card_type);
|
|
}
|
|
static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
|
|
|
|
static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
|
|
|
|
return sprintf(buf, "%u\n", dc->open_ttys);
|
|
}
|
|
static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
|
|
|
|
static void make_sysfs_files(struct nozomi *dc)
|
|
{
|
|
if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
|
|
dev_err(&dc->pdev->dev,
|
|
"Could not create sysfs file for card_type\n");
|
|
if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
|
|
dev_err(&dc->pdev->dev,
|
|
"Could not create sysfs file for open_ttys\n");
|
|
}
|
|
|
|
static void remove_sysfs_files(struct nozomi *dc)
|
|
{
|
|
device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
|
|
device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
|
|
}
|
|
|
|
/* Allocate memory for one device */
|
|
static int __devinit nozomi_card_init(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
resource_size_t start;
|
|
int ret;
|
|
struct nozomi *dc = NULL;
|
|
int ndev_idx;
|
|
int i;
|
|
|
|
dev_dbg(&pdev->dev, "Init, new card found\n");
|
|
|
|
for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
|
|
if (!ndevs[ndev_idx])
|
|
break;
|
|
|
|
if (ndev_idx >= ARRAY_SIZE(ndevs)) {
|
|
dev_err(&pdev->dev, "no free tty range for this card left\n");
|
|
ret = -EIO;
|
|
goto err;
|
|
}
|
|
|
|
dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
|
|
if (unlikely(!dc)) {
|
|
dev_err(&pdev->dev, "Could not allocate memory\n");
|
|
ret = -ENOMEM;
|
|
goto err_free;
|
|
}
|
|
|
|
dc->pdev = pdev;
|
|
|
|
ret = pci_enable_device(dc->pdev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "Failed to enable PCI Device\n");
|
|
goto err_free;
|
|
}
|
|
|
|
ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
|
|
(int) /* nozomi_private.io_addr */ 0);
|
|
goto err_disable_device;
|
|
}
|
|
|
|
start = pci_resource_start(dc->pdev, 0);
|
|
if (start == 0) {
|
|
dev_err(&pdev->dev, "No I/O address for card detected\n");
|
|
ret = -ENODEV;
|
|
goto err_rel_regs;
|
|
}
|
|
|
|
/* Find out what card type it is */
|
|
nozomi_get_card_type(dc);
|
|
|
|
dc->base_addr = ioremap(start, dc->card_type);
|
|
if (!dc->base_addr) {
|
|
dev_err(&pdev->dev, "Unable to map card MMIO\n");
|
|
ret = -ENODEV;
|
|
goto err_rel_regs;
|
|
}
|
|
|
|
dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
|
|
if (!dc->send_buf) {
|
|
dev_err(&pdev->dev, "Could not allocate send buffer?\n");
|
|
ret = -ENOMEM;
|
|
goto err_free_sbuf;
|
|
}
|
|
|
|
spin_lock_init(&dc->spin_mutex);
|
|
|
|
nozomi_setup_private_data(dc);
|
|
|
|
/* Disable all interrupts */
|
|
dc->last_ier = 0;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
|
|
ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
|
|
NOZOMI_NAME, dc);
|
|
if (unlikely(ret)) {
|
|
dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
|
|
goto err_free_sbuf;
|
|
}
|
|
|
|
DBG1("base_addr: %p", dc->base_addr);
|
|
|
|
make_sysfs_files(dc);
|
|
|
|
dc->index_start = ndev_idx * MAX_PORT;
|
|
ndevs[ndev_idx] = dc;
|
|
|
|
pci_set_drvdata(pdev, dc);
|
|
|
|
/* Enable RESET interrupt */
|
|
dc->last_ier = RESET;
|
|
iowrite16(dc->last_ier, dc->reg_ier);
|
|
|
|
dc->state = NOZOMI_STATE_ENABLED;
|
|
|
|
for (i = 0; i < MAX_PORT; i++) {
|
|
mutex_init(&dc->port[i].tty_sem);
|
|
dc->port[i].tty_open_count = 0;
|
|
dc->port[i].tty = NULL;
|
|
tty_register_device(ntty_driver, dc->index_start + i,
|
|
&pdev->dev);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_free_sbuf:
|
|
kfree(dc->send_buf);
|
|
iounmap(dc->base_addr);
|
|
err_rel_regs:
|
|
pci_release_regions(pdev);
|
|
err_disable_device:
|
|
pci_disable_device(pdev);
|
|
err_free:
|
|
kfree(dc);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static void __devexit tty_exit(struct nozomi *dc)
|
|
{
|
|
unsigned int i;
|
|
|
|
DBG1(" ");
|
|
|
|
flush_scheduled_work();
|
|
|
|
for (i = 0; i < MAX_PORT; ++i)
|
|
if (dc->port[i].tty && \
|
|
list_empty(&dc->port[i].tty->hangup_work.entry))
|
|
tty_hangup(dc->port[i].tty);
|
|
|
|
while (dc->open_ttys)
|
|
msleep(1);
|
|
|
|
for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
|
|
tty_unregister_device(ntty_driver, i);
|
|
}
|
|
|
|
/* Deallocate memory for one device */
|
|
static void __devexit nozomi_card_exit(struct pci_dev *pdev)
|
|
{
|
|
int i;
|
|
struct ctrl_ul ctrl;
|
|
struct nozomi *dc = pci_get_drvdata(pdev);
|
|
|
|
/* Disable all interrupts */
|
|
dc->last_ier = 0;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
|
|
tty_exit(dc);
|
|
|
|
/* Send 0x0001, command card to resend the reset token. */
|
|
/* This is to get the reset when the module is reloaded. */
|
|
ctrl.port = 0x00;
|
|
ctrl.reserved = 0;
|
|
ctrl.RTS = 0;
|
|
ctrl.DTR = 1;
|
|
DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
|
|
|
|
/* Setup dc->reg addresses to we can use defines here */
|
|
write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
|
|
writew(CTRL_UL, dc->reg_fcr); /* push the token to the card. */
|
|
|
|
remove_sysfs_files(dc);
|
|
|
|
free_irq(pdev->irq, dc);
|
|
|
|
for (i = 0; i < MAX_PORT; i++)
|
|
if (dc->port[i].fifo_ul)
|
|
kfifo_free(dc->port[i].fifo_ul);
|
|
|
|
kfree(dc->send_buf);
|
|
|
|
iounmap(dc->base_addr);
|
|
|
|
pci_release_regions(pdev);
|
|
|
|
pci_disable_device(pdev);
|
|
|
|
ndevs[dc->index_start / MAX_PORT] = NULL;
|
|
|
|
kfree(dc);
|
|
}
|
|
|
|
static void set_rts(const struct tty_struct *tty, int rts)
|
|
{
|
|
struct port *port = get_port_by_tty(tty);
|
|
|
|
port->ctrl_ul.RTS = rts;
|
|
port->update_flow_control = 1;
|
|
enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
|
|
}
|
|
|
|
static void set_dtr(const struct tty_struct *tty, int dtr)
|
|
{
|
|
struct port *port = get_port_by_tty(tty);
|
|
|
|
DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
|
|
|
|
port->ctrl_ul.DTR = dtr;
|
|
port->update_flow_control = 1;
|
|
enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
|
|
}
|
|
|
|
/*
|
|
* ----------------------------------------------------------------------------
|
|
* TTY code
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
/* Called when the userspace process opens the tty, /dev/noz*. */
|
|
static int ntty_open(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct port *port = get_port_by_tty(tty);
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
unsigned long flags;
|
|
|
|
if (!port || !dc || dc->state != NOZOMI_STATE_READY)
|
|
return -ENODEV;
|
|
|
|
if (mutex_lock_interruptible(&port->tty_sem))
|
|
return -ERESTARTSYS;
|
|
|
|
port->tty_open_count++;
|
|
dc->open_ttys++;
|
|
|
|
/* Enable interrupt downlink for channel */
|
|
if (port->tty_open_count == 1) {
|
|
tty->low_latency = 1;
|
|
tty->driver_data = port;
|
|
port->tty = tty;
|
|
DBG1("open: %d", port->token_dl);
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
dc->last_ier = dc->last_ier | port->token_dl;
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
}
|
|
|
|
mutex_unlock(&port->tty_sem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Called when the userspace process close the tty, /dev/noz*. */
|
|
static void ntty_close(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
struct port *port = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!dc || !port)
|
|
return;
|
|
|
|
if (mutex_lock_interruptible(&port->tty_sem))
|
|
return;
|
|
|
|
if (!port->tty_open_count)
|
|
goto exit;
|
|
|
|
dc->open_ttys--;
|
|
port->tty_open_count--;
|
|
|
|
if (port->tty_open_count == 0) {
|
|
DBG1("close: %d", port->token_dl);
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
dc->last_ier &= ~(port->token_dl);
|
|
writew(dc->last_ier, dc->reg_ier);
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
}
|
|
|
|
exit:
|
|
mutex_unlock(&port->tty_sem);
|
|
}
|
|
|
|
/*
|
|
* called when the userspace process writes to the tty (/dev/noz*).
|
|
* Data is inserted into a fifo, which is then read and transfered to the modem.
|
|
*/
|
|
static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
|
|
int count)
|
|
{
|
|
int rval = -EINVAL;
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
struct port *port = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
/* DBG1( "WRITEx: %d, index = %d", count, index); */
|
|
|
|
if (!dc || !port)
|
|
return -ENODEV;
|
|
|
|
if (unlikely(!mutex_trylock(&port->tty_sem))) {
|
|
/*
|
|
* must test lock as tty layer wraps calls
|
|
* to this function with BKL
|
|
*/
|
|
dev_err(&dc->pdev->dev, "Would have deadlocked - "
|
|
"return EAGAIN\n");
|
|
return -EAGAIN;
|
|
}
|
|
|
|
if (unlikely(!port->tty_open_count)) {
|
|
DBG1(" ");
|
|
goto exit;
|
|
}
|
|
|
|
rval = __kfifo_put(port->fifo_ul, (unsigned char *)buffer, count);
|
|
|
|
/* notify card */
|
|
if (unlikely(dc == NULL)) {
|
|
DBG1("No device context?");
|
|
goto exit;
|
|
}
|
|
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
/* CTS is only valid on the modem channel */
|
|
if (port == &(dc->port[PORT_MDM])) {
|
|
if (port->ctrl_dl.CTS) {
|
|
DBG4("Enable interrupt");
|
|
enable_transmit_ul(tty->index % MAX_PORT, dc);
|
|
} else {
|
|
dev_err(&dc->pdev->dev,
|
|
"CTS not active on modem port?\n");
|
|
}
|
|
} else {
|
|
enable_transmit_ul(tty->index % MAX_PORT, dc);
|
|
}
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
|
|
exit:
|
|
mutex_unlock(&port->tty_sem);
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Calculate how much is left in device
|
|
* This method is called by the upper tty layer.
|
|
* #according to sources N_TTY.c it expects a value >= 0 and
|
|
* does not check for negative values.
|
|
*/
|
|
static int ntty_write_room(struct tty_struct *tty)
|
|
{
|
|
struct port *port = tty->driver_data;
|
|
int room = 0;
|
|
const struct nozomi *dc = get_dc_by_tty(tty);
|
|
|
|
if (!dc || !port)
|
|
return 0;
|
|
if (!mutex_trylock(&port->tty_sem))
|
|
return 0;
|
|
|
|
if (!port->tty_open_count)
|
|
goto exit;
|
|
|
|
room = port->fifo_ul->size - __kfifo_len(port->fifo_ul);
|
|
|
|
exit:
|
|
mutex_unlock(&port->tty_sem);
|
|
return room;
|
|
}
|
|
|
|
/* Gets io control parameters */
|
|
static int ntty_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
const struct port *port = tty->driver_data;
|
|
const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
|
|
const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
|
|
|
|
/* Note: these could change under us but it is not clear this
|
|
matters if so */
|
|
return (ctrl_ul->RTS ? TIOCM_RTS : 0) |
|
|
(ctrl_ul->DTR ? TIOCM_DTR : 0) |
|
|
(ctrl_dl->DCD ? TIOCM_CAR : 0) |
|
|
(ctrl_dl->RI ? TIOCM_RNG : 0) |
|
|
(ctrl_dl->DSR ? TIOCM_DSR : 0) |
|
|
(ctrl_dl->CTS ? TIOCM_CTS : 0);
|
|
}
|
|
|
|
/* Sets io controls parameters */
|
|
static int ntty_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
if (set & TIOCM_RTS)
|
|
set_rts(tty, 1);
|
|
else if (clear & TIOCM_RTS)
|
|
set_rts(tty, 0);
|
|
|
|
if (set & TIOCM_DTR)
|
|
set_dtr(tty, 1);
|
|
else if (clear & TIOCM_DTR)
|
|
set_dtr(tty, 0);
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ntty_cflags_changed(struct port *port, unsigned long flags,
|
|
struct async_icount *cprev)
|
|
{
|
|
const struct async_icount cnow = port->tty_icount;
|
|
int ret;
|
|
|
|
ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
|
|
((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
|
|
((flags & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
|
|
((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
|
|
|
|
*cprev = cnow;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int ntty_ioctl_tiocgicount(struct port *port, void __user *argp)
|
|
{
|
|
const struct async_icount cnow = port->tty_icount;
|
|
struct serial_icounter_struct icount;
|
|
|
|
icount.cts = cnow.cts;
|
|
icount.dsr = cnow.dsr;
|
|
icount.rng = cnow.rng;
|
|
icount.dcd = cnow.dcd;
|
|
icount.rx = cnow.rx;
|
|
icount.tx = cnow.tx;
|
|
icount.frame = cnow.frame;
|
|
icount.overrun = cnow.overrun;
|
|
icount.parity = cnow.parity;
|
|
icount.brk = cnow.brk;
|
|
icount.buf_overrun = cnow.buf_overrun;
|
|
|
|
return copy_to_user(argp, &icount, sizeof(icount)) ? -EFAULT : 0;
|
|
}
|
|
|
|
static int ntty_ioctl(struct tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct port *port = tty->driver_data;
|
|
void __user *argp = (void __user *)arg;
|
|
int rval = -ENOIOCTLCMD;
|
|
|
|
DBG1("******** IOCTL, cmd: %d", cmd);
|
|
|
|
switch (cmd) {
|
|
case TIOCMIWAIT: {
|
|
struct async_icount cprev = port->tty_icount;
|
|
|
|
rval = wait_event_interruptible(port->tty_wait,
|
|
ntty_cflags_changed(port, arg, &cprev));
|
|
break;
|
|
} case TIOCGICOUNT:
|
|
rval = ntty_ioctl_tiocgicount(port, argp);
|
|
break;
|
|
default:
|
|
DBG1("ERR: 0x%08X, %d", cmd, cmd);
|
|
break;
|
|
};
|
|
|
|
return rval;
|
|
}
|
|
|
|
/*
|
|
* Called by the upper tty layer when tty buffers are ready
|
|
* to receive data again after a call to throttle.
|
|
*/
|
|
static void ntty_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
unsigned long flags;
|
|
|
|
DBG1("UNTHROTTLE");
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
enable_transmit_dl(tty->index % MAX_PORT, dc);
|
|
set_rts(tty, 1);
|
|
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
}
|
|
|
|
/*
|
|
* Called by the upper tty layer when the tty buffers are almost full.
|
|
* The driver should stop send more data.
|
|
*/
|
|
static void ntty_throttle(struct tty_struct *tty)
|
|
{
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
unsigned long flags;
|
|
|
|
DBG1("THROTTLE");
|
|
spin_lock_irqsave(&dc->spin_mutex, flags);
|
|
set_rts(tty, 0);
|
|
spin_unlock_irqrestore(&dc->spin_mutex, flags);
|
|
}
|
|
|
|
/* Returns number of chars in buffer, called by tty layer */
|
|
static s32 ntty_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct port *port = tty->driver_data;
|
|
struct nozomi *dc = get_dc_by_tty(tty);
|
|
s32 rval;
|
|
|
|
if (unlikely(!dc || !port)) {
|
|
rval = -ENODEV;
|
|
goto exit_in_buffer;
|
|
}
|
|
|
|
if (unlikely(!port->tty_open_count)) {
|
|
dev_err(&dc->pdev->dev, "No tty open?\n");
|
|
rval = -ENODEV;
|
|
goto exit_in_buffer;
|
|
}
|
|
|
|
rval = __kfifo_len(port->fifo_ul);
|
|
|
|
exit_in_buffer:
|
|
return rval;
|
|
}
|
|
|
|
static const struct tty_operations tty_ops = {
|
|
.ioctl = ntty_ioctl,
|
|
.open = ntty_open,
|
|
.close = ntty_close,
|
|
.write = ntty_write,
|
|
.write_room = ntty_write_room,
|
|
.unthrottle = ntty_unthrottle,
|
|
.throttle = ntty_throttle,
|
|
.chars_in_buffer = ntty_chars_in_buffer,
|
|
.tiocmget = ntty_tiocmget,
|
|
.tiocmset = ntty_tiocmset,
|
|
};
|
|
|
|
/* Module initialization */
|
|
static struct pci_driver nozomi_driver = {
|
|
.name = NOZOMI_NAME,
|
|
.id_table = nozomi_pci_tbl,
|
|
.probe = nozomi_card_init,
|
|
.remove = __devexit_p(nozomi_card_exit),
|
|
};
|
|
|
|
static __init int nozomi_init(void)
|
|
{
|
|
int ret;
|
|
|
|
printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
|
|
|
|
ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
|
|
if (!ntty_driver)
|
|
return -ENOMEM;
|
|
|
|
ntty_driver->owner = THIS_MODULE;
|
|
ntty_driver->driver_name = NOZOMI_NAME_TTY;
|
|
ntty_driver->name = "noz";
|
|
ntty_driver->major = 0;
|
|
ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
ntty_driver->subtype = SERIAL_TYPE_NORMAL;
|
|
ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
|
|
ntty_driver->init_termios = tty_std_termios;
|
|
ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
|
|
HUPCL | CLOCAL;
|
|
ntty_driver->init_termios.c_ispeed = 115200;
|
|
ntty_driver->init_termios.c_ospeed = 115200;
|
|
tty_set_operations(ntty_driver, &tty_ops);
|
|
|
|
ret = tty_register_driver(ntty_driver);
|
|
if (ret) {
|
|
printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
|
|
goto free_tty;
|
|
}
|
|
|
|
ret = pci_register_driver(&nozomi_driver);
|
|
if (ret) {
|
|
printk(KERN_ERR "Nozomi: can't register pci driver\n");
|
|
goto unr_tty;
|
|
}
|
|
|
|
return 0;
|
|
unr_tty:
|
|
tty_unregister_driver(ntty_driver);
|
|
free_tty:
|
|
put_tty_driver(ntty_driver);
|
|
return ret;
|
|
}
|
|
|
|
static __exit void nozomi_exit(void)
|
|
{
|
|
printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
|
|
pci_unregister_driver(&nozomi_driver);
|
|
tty_unregister_driver(ntty_driver);
|
|
put_tty_driver(ntty_driver);
|
|
}
|
|
|
|
module_init(nozomi_init);
|
|
module_exit(nozomi_exit);
|
|
|
|
module_param(debug, int, S_IRUGO | S_IWUSR);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION(DRIVER_DESC);
|