2611 lines
64 KiB
C
2611 lines
64 KiB
C
![]() |
/*
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* specialix.c -- specialix IO8+ multiport serial driver.
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*
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* Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl)
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* Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
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*
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* Specialix pays for the development and support of this driver.
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* Please DO contact io8-linux@specialix.co.uk if you require
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* support. But please read the documentation (specialix.txt)
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* first.
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*
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* This driver was developped in the BitWizard linux device
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* driver service. If you require a linux device driver for your
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* product, please contact devices@BitWizard.nl for a quote.
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*
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* This code is firmly based on the riscom/8 serial driver,
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* written by Dmitry Gorodchanin. The specialix IO8+ card
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* programming information was obtained from the CL-CD1865 Data
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* Book, and Specialix document number 6200059: IO8+ Hardware
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* Functional Specification.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (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
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* useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the 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
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* License along with this program; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
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* USA.
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*
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* Revision history:
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*
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* Revision 1.0: April 1st 1997.
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* Initial release for alpha testing.
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* Revision 1.1: April 14th 1997.
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* Incorporated Richard Hudsons suggestions,
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* removed some debugging printk's.
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* Revision 1.2: April 15th 1997.
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* Ported to 2.1.x kernels.
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* Revision 1.3: April 17th 1997
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* Backported to 2.0. (Compatibility macros).
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* Revision 1.4: April 18th 1997
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* Fixed DTR/RTS bug that caused the card to indicate
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* "don't send data" to a modem after the password prompt.
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* Fixed bug for premature (fake) interrupts.
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* Revision 1.5: April 19th 1997
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* fixed a minor typo in the header file, cleanup a little.
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* performance warnings are now MAXed at once per minute.
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* Revision 1.6: May 23 1997
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* Changed the specialix=... format to include interrupt.
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* Revision 1.7: May 27 1997
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* Made many more debug printk's a compile time option.
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* Revision 1.8: Jul 1 1997
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* port to linux-2.1.43 kernel.
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* Revision 1.9: Oct 9 1998
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* Added stuff for the IO8+/PCI version.
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* Revision 1.10: Oct 22 1999 / Jan 21 2000.
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* Added stuff for setserial.
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* Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr)
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*
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*/
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#define VERSION "1.11"
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/*
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* There is a bunch of documentation about the card, jumpers, config
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* settings, restrictions, cables, device names and numbers in
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* Documentation/specialix.txt
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*/
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#include <linux/config.h>
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#include <linux/module.h>
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#include <asm/io.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/errno.h>
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#include <linux/tty.h>
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#include <linux/mm.h>
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#include <linux/serial.h>
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#include <linux/fcntl.h>
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#include <linux/major.h>
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#include <linux/delay.h>
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#include <linux/version.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <asm/uaccess.h>
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#include "specialix_io8.h"
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#include "cd1865.h"
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/*
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This driver can spew a whole lot of debugging output at you. If you
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need maximum performance, you should disable the DEBUG define. To
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aid in debugging in the field, I'm leaving the compile-time debug
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features enabled, and disable them "runtime". That allows me to
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instruct people with problems to enable debugging without requiring
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them to recompile...
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*/
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#define DEBUG
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static int sx_debug;
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static int sx_rxfifo = SPECIALIX_RXFIFO;
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#ifdef DEBUG
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#define dprintk(f, str...) if (sx_debug & f) printk (str)
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#else
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#define dprintk(f, str...) /* nothing */
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#endif
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#define SX_DEBUG_FLOW 0x0001
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#define SX_DEBUG_DATA 0x0002
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#define SX_DEBUG_PROBE 0x0004
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#define SX_DEBUG_CHAN 0x0008
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#define SX_DEBUG_INIT 0x0010
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#define SX_DEBUG_RX 0x0020
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#define SX_DEBUG_TX 0x0040
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#define SX_DEBUG_IRQ 0x0080
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#define SX_DEBUG_OPEN 0x0100
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#define SX_DEBUG_TERMIOS 0x0200
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#define SX_DEBUG_SIGNALS 0x0400
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#define SX_DEBUG_FIFO 0x0800
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#define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__)
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#define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__)
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#define jiffies_from_ms(a) ((((a) * HZ)/1000)+1)
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/* Configurable options: */
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/* Am I paranoid or not ? ;-) */
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#define SPECIALIX_PARANOIA_CHECK
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/* Do I trust the IRQ from the card? (enabeling it doesn't seem to help)
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When the IRQ routine leaves the chip in a state that is keeps on
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requiring attention, the timer doesn't help either. */
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#undef SPECIALIX_TIMER
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#ifdef SPECIALIX_TIMER
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static int sx_poll = HZ;
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#endif
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/*
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* The following defines are mostly for testing purposes. But if you need
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* some nice reporting in your syslog, you can define them also.
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*/
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#undef SX_REPORT_FIFO
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#undef SX_REPORT_OVERRUN
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#ifdef CONFIG_SPECIALIX_RTSCTS
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#define SX_CRTSCTS(bla) 1
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#else
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#define SX_CRTSCTS(tty) C_CRTSCTS(tty)
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#endif
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/* Used to be outb (0xff, 0x80); */
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#define short_pause() udelay (1)
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#define SPECIALIX_LEGAL_FLAGS \
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(ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
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ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \
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ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
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#undef RS_EVENT_WRITE_WAKEUP
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#define RS_EVENT_WRITE_WAKEUP 0
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static struct tty_driver *specialix_driver;
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static unsigned char * tmp_buf;
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static DECLARE_MUTEX(tmp_buf_sem);
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static unsigned long baud_table[] = {
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0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
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9600, 19200, 38400, 57600, 115200, 0,
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};
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static struct specialix_board sx_board[SX_NBOARD] = {
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{ 0, SX_IOBASE1, 9, },
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{ 0, SX_IOBASE2, 11, },
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{ 0, SX_IOBASE3, 12, },
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{ 0, SX_IOBASE4, 15, },
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};
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static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
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#ifdef SPECIALIX_TIMER
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static struct timer_list missed_irq_timer;
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static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs);
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#endif
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static inline int sx_paranoia_check(struct specialix_port const * port,
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char *name, const char *routine)
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{
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#ifdef SPECIALIX_PARANOIA_CHECK
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static const char *badmagic =
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KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n";
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static const char *badinfo =
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KERN_ERR "sx: Warning: null specialix port for device %s in %s\n";
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if (!port) {
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printk(badinfo, name, routine);
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return 1;
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}
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if (port->magic != SPECIALIX_MAGIC) {
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printk(badmagic, name, routine);
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return 1;
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}
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#endif
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return 0;
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}
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/*
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*
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* Service functions for specialix IO8+ driver.
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*
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*/
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/* Get board number from pointer */
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static inline int board_No (struct specialix_board * bp)
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{
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return bp - sx_board;
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}
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/* Get port number from pointer */
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static inline int port_No (struct specialix_port const * port)
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{
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return SX_PORT(port - sx_port);
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}
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/* Get pointer to board from pointer to port */
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static inline struct specialix_board * port_Board(struct specialix_port const * port)
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{
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return &sx_board[SX_BOARD(port - sx_port)];
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}
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/* Input Byte from CL CD186x register */
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static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg)
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{
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bp->reg = reg | 0x80;
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outb (reg | 0x80, bp->base + SX_ADDR_REG);
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return inb (bp->base + SX_DATA_REG);
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}
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/* Output Byte to CL CD186x register */
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static inline void sx_out(struct specialix_board * bp, unsigned short reg,
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unsigned char val)
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{
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bp->reg = reg | 0x80;
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outb (reg | 0x80, bp->base + SX_ADDR_REG);
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outb (val, bp->base + SX_DATA_REG);
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}
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/* Input Byte from CL CD186x register */
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static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg)
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{
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bp->reg = reg;
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outb (reg, bp->base + SX_ADDR_REG);
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return inb (bp->base + SX_DATA_REG);
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}
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/* Output Byte to CL CD186x register */
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static inline void sx_out_off(struct specialix_board * bp, unsigned short reg,
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unsigned char val)
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{
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bp->reg = reg;
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outb (reg, bp->base + SX_ADDR_REG);
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outb (val, bp->base + SX_DATA_REG);
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}
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/* Wait for Channel Command Register ready */
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static inline void sx_wait_CCR(struct specialix_board * bp)
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{
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unsigned long delay, flags;
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unsigned char ccr;
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for (delay = SX_CCR_TIMEOUT; delay; delay--) {
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spin_lock_irqsave(&bp->lock, flags);
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ccr = sx_in(bp, CD186x_CCR);
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spin_unlock_irqrestore(&bp->lock, flags);
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if (!ccr)
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return;
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udelay (1);
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}
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printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
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}
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/* Wait for Channel Command Register ready */
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static inline void sx_wait_CCR_off(struct specialix_board * bp)
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{
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unsigned long delay;
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unsigned char crr;
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unsigned long flags;
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for (delay = SX_CCR_TIMEOUT; delay; delay--) {
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spin_lock_irqsave(&bp->lock, flags);
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crr = sx_in_off(bp, CD186x_CCR);
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spin_unlock_irqrestore(&bp->lock, flags);
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if (!crr)
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return;
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udelay (1);
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}
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printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
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}
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/*
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* specialix IO8+ IO range functions.
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*/
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static inline int sx_check_io_range(struct specialix_board * bp)
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{
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return check_region (bp->base, SX_IO_SPACE);
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}
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static inline void sx_request_io_range(struct specialix_board * bp)
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{
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request_region(bp->base,
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bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE,
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"specialix IO8+" );
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}
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static inline void sx_release_io_range(struct specialix_board * bp)
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{
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release_region(bp->base,
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bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE);
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}
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/* Must be called with enabled interrupts */
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/* Ugly. Very ugly. Don't use this for anything else than initialization
|
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code */
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static inline void sx_long_delay(unsigned long delay)
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{
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unsigned long i;
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for (i = jiffies + delay; time_after(i, jiffies); ) ;
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}
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/* Set the IRQ using the RTS lines that run to the PAL on the board.... */
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static int sx_set_irq ( struct specialix_board *bp)
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{
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int virq;
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int i;
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unsigned long flags;
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if (bp->flags & SX_BOARD_IS_PCI)
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return 1;
|
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switch (bp->irq) {
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/* In the same order as in the docs... */
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case 15: virq = 0;break;
|
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case 12: virq = 1;break;
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case 11: virq = 2;break;
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case 9: virq = 3;break;
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default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq);
|
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return 0;
|
||
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}
|
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spin_lock_irqsave(&bp->lock, flags);
|
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for (i=0;i<2;i++) {
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sx_out(bp, CD186x_CAR, i);
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sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0);
|
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}
|
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spin_unlock_irqrestore(&bp->lock, flags);
|
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return 1;
|
||
|
}
|
||
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|
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|
||
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/* Reset and setup CD186x chip */
|
||
|
static int sx_init_CD186x(struct specialix_board * bp)
|
||
|
{
|
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unsigned long flags;
|
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int scaler;
|
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int rv = 1;
|
||
|
|
||
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func_enter();
|
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sx_wait_CCR_off(bp); /* Wait for CCR ready */
|
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spin_lock_irqsave(&bp->lock, flags);
|
||
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sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
sx_long_delay(HZ/20); /* Delay 0.05 sec */
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */
|
||
|
sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */
|
||
|
sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */
|
||
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sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */
|
||
|
sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */
|
||
|
/* Set RegAckEn */
|
||
|
sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN);
|
||
|
|
||
|
/* Setting up prescaler. We need 4 ticks per 1 ms */
|
||
|
scaler = SX_OSCFREQ/SPECIALIX_TPS;
|
||
|
|
||
|
sx_out_off(bp, CD186x_PPRH, scaler >> 8);
|
||
|
sx_out_off(bp, CD186x_PPRL, scaler & 0xff);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
if (!sx_set_irq (bp)) {
|
||
|
/* Figure out how to pass this along... */
|
||
|
printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq);
|
||
|
rv = 0;
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return rv;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int read_cross_byte (struct specialix_board *bp, int reg, int bit)
|
||
|
{
|
||
|
int i;
|
||
|
int t;
|
||
|
unsigned long flags;
|
||
|
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
for (i=0, t=0;i<8;i++) {
|
||
|
sx_out_off (bp, CD186x_CAR, i);
|
||
|
if (sx_in_off (bp, reg) & bit)
|
||
|
t |= 1 << i;
|
||
|
}
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
return t;
|
||
|
}
|
||
|
|
||
|
|
||
|
#ifdef SPECIALIX_TIMER
|
||
|
void missed_irq (unsigned long data)
|
||
|
{
|
||
|
unsigned char irq;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board *bp = (struct specialix_board *)data;
|
||
|
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) &
|
||
|
(SRSR_RREQint |
|
||
|
SRSR_TREQint |
|
||
|
SRSR_MREQint);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
if (irq) {
|
||
|
printk (KERN_INFO "Missed interrupt... Calling int from timer. \n");
|
||
|
sx_interrupt (((struct specialix_board *)data)->irq,
|
||
|
(void*)data, NULL);
|
||
|
}
|
||
|
missed_irq_timer.expires = jiffies + sx_poll;
|
||
|
add_timer (&missed_irq_timer);
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
|
||
|
|
||
|
/* Main probing routine, also sets irq. */
|
||
|
static int sx_probe(struct specialix_board *bp)
|
||
|
{
|
||
|
unsigned char val1, val2;
|
||
|
#if 0
|
||
|
int irqs = 0;
|
||
|
int retries;
|
||
|
#endif
|
||
|
int rev;
|
||
|
int chip;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_check_io_range(bp)) {
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
/* Are the I/O ports here ? */
|
||
|
sx_out_off(bp, CD186x_PPRL, 0x5a);
|
||
|
short_pause ();
|
||
|
val1 = sx_in_off(bp, CD186x_PPRL);
|
||
|
|
||
|
sx_out_off(bp, CD186x_PPRL, 0xa5);
|
||
|
short_pause ();
|
||
|
val2 = sx_in_off(bp, CD186x_PPRL);
|
||
|
|
||
|
|
||
|
if ((val1 != 0x5a) || (val2 != 0xa5)) {
|
||
|
printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n",
|
||
|
board_No(bp), bp->base);
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
/* Check the DSR lines that Specialix uses as board
|
||
|
identification */
|
||
|
val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR);
|
||
|
val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS);
|
||
|
dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n",
|
||
|
board_No(bp), val1, val2);
|
||
|
|
||
|
/* They managed to switch the bit order between the docs and
|
||
|
the IO8+ card. The new PCI card now conforms to old docs.
|
||
|
They changed the PCI docs to reflect the situation on the
|
||
|
old card. */
|
||
|
val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2;
|
||
|
if (val1 != val2) {
|
||
|
printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n",
|
||
|
board_No(bp), val2, bp->base, val1);
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
|
||
|
#if 0
|
||
|
/* It's time to find IRQ for this board */
|
||
|
for (retries = 0; retries < 5 && irqs <= 0; retries++) {
|
||
|
irqs = probe_irq_on();
|
||
|
sx_init_CD186x(bp); /* Reset CD186x chip */
|
||
|
sx_out(bp, CD186x_CAR, 2); /* Select port 2 */
|
||
|
sx_wait_CCR(bp);
|
||
|
sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */
|
||
|
sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */
|
||
|
sx_long_delay(HZ/20);
|
||
|
irqs = probe_irq_off(irqs);
|
||
|
|
||
|
dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR));
|
||
|
dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR));
|
||
|
dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR));
|
||
|
dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR));
|
||
|
dprintk (SX_DEBUG_INIT, "\n");
|
||
|
|
||
|
/* Reset CD186x again */
|
||
|
if (!sx_init_CD186x(bp)) {
|
||
|
/* Hmmm. This is dead code anyway. */
|
||
|
}
|
||
|
|
||
|
dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n",
|
||
|
val1, val2, val3);
|
||
|
|
||
|
}
|
||
|
|
||
|
#if 0
|
||
|
if (irqs <= 0) {
|
||
|
printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n",
|
||
|
board_No(bp), bp->base);
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
#endif
|
||
|
printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs);
|
||
|
if (irqs > 0)
|
||
|
bp->irq = irqs;
|
||
|
#endif
|
||
|
/* Reset CD186x again */
|
||
|
if (!sx_init_CD186x(bp)) {
|
||
|
func_exit();
|
||
|
return -EIO;
|
||
|
}
|
||
|
|
||
|
sx_request_io_range(bp);
|
||
|
bp->flags |= SX_BOARD_PRESENT;
|
||
|
|
||
|
/* Chip revcode pkgtype
|
||
|
GFRCR SRCR bit 7
|
||
|
CD180 rev B 0x81 0
|
||
|
CD180 rev C 0x82 0
|
||
|
CD1864 rev A 0x82 1
|
||
|
CD1865 rev A 0x83 1 -- Do not use!!! Does not work.
|
||
|
CD1865 rev B 0x84 1
|
||
|
-- Thanks to Gwen Wang, Cirrus Logic.
|
||
|
*/
|
||
|
|
||
|
switch (sx_in_off(bp, CD186x_GFRCR)) {
|
||
|
case 0x82:chip = 1864;rev='A';break;
|
||
|
case 0x83:chip = 1865;rev='A';break;
|
||
|
case 0x84:chip = 1865;rev='B';break;
|
||
|
case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */
|
||
|
default:chip=-1;rev='x';
|
||
|
}
|
||
|
|
||
|
dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) );
|
||
|
|
||
|
#ifdef SPECIALIX_TIMER
|
||
|
init_timer (&missed_irq_timer);
|
||
|
missed_irq_timer.function = missed_irq;
|
||
|
missed_irq_timer.data = (unsigned long) bp;
|
||
|
missed_irq_timer.expires = jiffies + sx_poll;
|
||
|
add_timer (&missed_irq_timer);
|
||
|
#endif
|
||
|
|
||
|
printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
|
||
|
board_No(bp),
|
||
|
bp->base, bp->irq,
|
||
|
chip, rev);
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
*
|
||
|
* Interrupt processing routines.
|
||
|
* */
|
||
|
|
||
|
static inline void sx_mark_event(struct specialix_port * port, int event)
|
||
|
{
|
||
|
func_enter();
|
||
|
|
||
|
set_bit(event, &port->event);
|
||
|
schedule_work(&port->tqueue);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline struct specialix_port * sx_get_port(struct specialix_board * bp,
|
||
|
unsigned char const * what)
|
||
|
{
|
||
|
unsigned char channel;
|
||
|
struct specialix_port * port = NULL;
|
||
|
|
||
|
channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF;
|
||
|
dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel);
|
||
|
if (channel < CD186x_NCH) {
|
||
|
port = &sx_port[board_No(bp) * SX_NPORT + channel];
|
||
|
dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED);
|
||
|
|
||
|
if (port->flags & ASYNC_INITIALIZED) {
|
||
|
dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port);
|
||
|
func_exit();
|
||
|
return port;
|
||
|
}
|
||
|
}
|
||
|
printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n",
|
||
|
board_No(bp), what, channel);
|
||
|
return NULL;
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline void sx_receive_exc(struct specialix_board * bp)
|
||
|
{
|
||
|
struct specialix_port *port;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned char status;
|
||
|
unsigned char ch;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
port = sx_get_port(bp, "Receive");
|
||
|
if (!port) {
|
||
|
dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n");
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
tty = port->tty;
|
||
|
dprintk (SX_DEBUG_RX, "port: %p count: %d BUFF_SIZE: %d\n",
|
||
|
port, tty->flip.count, TTY_FLIPBUF_SIZE);
|
||
|
|
||
|
status = sx_in(bp, CD186x_RCSR);
|
||
|
|
||
|
dprintk (SX_DEBUG_RX, "status: 0x%x\n", status);
|
||
|
if (status & RCSR_OE) {
|
||
|
port->overrun++;
|
||
|
dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n",
|
||
|
board_No(bp), port_No(port), port->overrun);
|
||
|
}
|
||
|
status &= port->mark_mask;
|
||
|
|
||
|
/* This flip buffer check needs to be below the reading of the
|
||
|
status register to reset the chip's IRQ.... */
|
||
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
|
||
|
dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n",
|
||
|
board_No(bp), port_No(port));
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
ch = sx_in(bp, CD186x_RDR);
|
||
|
if (!status) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
if (status & RCSR_TOUT) {
|
||
|
printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n",
|
||
|
board_No(bp), port_No(port));
|
||
|
func_exit();
|
||
|
return;
|
||
|
|
||
|
} else if (status & RCSR_BREAK) {
|
||
|
dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n",
|
||
|
board_No(bp), port_No(port));
|
||
|
*tty->flip.flag_buf_ptr++ = TTY_BREAK;
|
||
|
if (port->flags & ASYNC_SAK)
|
||
|
do_SAK(tty);
|
||
|
|
||
|
} else if (status & RCSR_PE)
|
||
|
*tty->flip.flag_buf_ptr++ = TTY_PARITY;
|
||
|
|
||
|
else if (status & RCSR_FE)
|
||
|
*tty->flip.flag_buf_ptr++ = TTY_FRAME;
|
||
|
|
||
|
else if (status & RCSR_OE)
|
||
|
*tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
|
||
|
|
||
|
else
|
||
|
*tty->flip.flag_buf_ptr++ = 0;
|
||
|
|
||
|
*tty->flip.char_buf_ptr++ = ch;
|
||
|
tty->flip.count++;
|
||
|
schedule_delayed_work(&tty->flip.work, 1);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline void sx_receive(struct specialix_board * bp)
|
||
|
{
|
||
|
struct specialix_port *port;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned char count;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (!(port = sx_get_port(bp, "Receive"))) {
|
||
|
dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n");
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
tty = port->tty;
|
||
|
|
||
|
count = sx_in(bp, CD186x_RDCR);
|
||
|
dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count);
|
||
|
port->hits[count > 8 ? 9 : count]++;
|
||
|
|
||
|
while (count--) {
|
||
|
if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
|
||
|
printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n",
|
||
|
board_No(bp), port_No(port));
|
||
|
break;
|
||
|
}
|
||
|
*tty->flip.char_buf_ptr++ = sx_in(bp, CD186x_RDR);
|
||
|
*tty->flip.flag_buf_ptr++ = 0;
|
||
|
tty->flip.count++;
|
||
|
}
|
||
|
schedule_delayed_work(&tty->flip.work, 1);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline void sx_transmit(struct specialix_board * bp)
|
||
|
{
|
||
|
struct specialix_port *port;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned char count;
|
||
|
|
||
|
func_enter();
|
||
|
if (!(port = sx_get_port(bp, "Transmit"))) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
dprintk (SX_DEBUG_TX, "port: %p\n", port);
|
||
|
tty = port->tty;
|
||
|
|
||
|
if (port->IER & IER_TXEMPTY) {
|
||
|
/* FIFO drained */
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
port->IER &= ~IER_TXEMPTY;
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if ((port->xmit_cnt <= 0 && !port->break_length)
|
||
|
|| tty->stopped || tty->hw_stopped) {
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (port->break_length) {
|
||
|
if (port->break_length > 0) {
|
||
|
if (port->COR2 & COR2_ETC) {
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_ESC);
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_SBRK);
|
||
|
port->COR2 &= ~COR2_ETC;
|
||
|
}
|
||
|
count = min_t(int, port->break_length, 0xff);
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_ESC);
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_DELAY);
|
||
|
sx_out(bp, CD186x_TDR, count);
|
||
|
if (!(port->break_length -= count))
|
||
|
port->break_length--;
|
||
|
} else {
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_ESC);
|
||
|
sx_out(bp, CD186x_TDR, CD186x_C_EBRK);
|
||
|
sx_out(bp, CD186x_COR2, port->COR2);
|
||
|
sx_wait_CCR(bp);
|
||
|
sx_out(bp, CD186x_CCR, CCR_CORCHG2);
|
||
|
port->break_length = 0;
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
count = CD186x_NFIFO;
|
||
|
do {
|
||
|
sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]);
|
||
|
port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
|
||
|
if (--port->xmit_cnt <= 0)
|
||
|
break;
|
||
|
} while (--count > 0);
|
||
|
|
||
|
if (port->xmit_cnt <= 0) {
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
}
|
||
|
if (port->xmit_cnt <= port->wakeup_chars)
|
||
|
sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline void sx_check_modem(struct specialix_board * bp)
|
||
|
{
|
||
|
struct specialix_port *port;
|
||
|
struct tty_struct *tty;
|
||
|
unsigned char mcr;
|
||
|
int msvr_cd;
|
||
|
|
||
|
dprintk (SX_DEBUG_SIGNALS, "Modem intr. ");
|
||
|
if (!(port = sx_get_port(bp, "Modem")))
|
||
|
return;
|
||
|
|
||
|
tty = port->tty;
|
||
|
|
||
|
mcr = sx_in(bp, CD186x_MCR);
|
||
|
printk ("mcr = %02x.\n", mcr);
|
||
|
|
||
|
if ((mcr & MCR_CDCHG)) {
|
||
|
dprintk (SX_DEBUG_SIGNALS, "CD just changed... ");
|
||
|
msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD;
|
||
|
if (msvr_cd) {
|
||
|
dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n");
|
||
|
wake_up_interruptible(&port->open_wait);
|
||
|
} else {
|
||
|
dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n");
|
||
|
schedule_work(&port->tqueue_hangup);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
#ifdef SPECIALIX_BRAIN_DAMAGED_CTS
|
||
|
if (mcr & MCR_CTSCHG) {
|
||
|
if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) {
|
||
|
tty->hw_stopped = 0;
|
||
|
port->IER |= IER_TXRDY;
|
||
|
if (port->xmit_cnt <= port->wakeup_chars)
|
||
|
sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
|
||
|
} else {
|
||
|
tty->hw_stopped = 1;
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
}
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
}
|
||
|
if (mcr & MCR_DSSXHG) {
|
||
|
if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) {
|
||
|
tty->hw_stopped = 0;
|
||
|
port->IER |= IER_TXRDY;
|
||
|
if (port->xmit_cnt <= port->wakeup_chars)
|
||
|
sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
|
||
|
} else {
|
||
|
tty->hw_stopped = 1;
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
}
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
}
|
||
|
#endif /* SPECIALIX_BRAIN_DAMAGED_CTS */
|
||
|
|
||
|
/* Clear change bits */
|
||
|
sx_out(bp, CD186x_MCR, 0);
|
||
|
}
|
||
|
|
||
|
|
||
|
/* The main interrupt processing routine */
|
||
|
static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
||
|
{
|
||
|
unsigned char status;
|
||
|
unsigned char ack;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long loop = 0;
|
||
|
int saved_reg;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
bp = dev_id;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
|
||
|
dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1);
|
||
|
if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) {
|
||
|
dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
func_exit();
|
||
|
return IRQ_NONE;
|
||
|
}
|
||
|
|
||
|
saved_reg = bp->reg;
|
||
|
|
||
|
while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) &
|
||
|
(SRSR_RREQint |
|
||
|
SRSR_TREQint |
|
||
|
SRSR_MREQint)))) {
|
||
|
if (status & SRSR_RREQint) {
|
||
|
ack = sx_in(bp, CD186x_RRAR);
|
||
|
|
||
|
if (ack == (SX_ID | GIVR_IT_RCV))
|
||
|
sx_receive(bp);
|
||
|
else if (ack == (SX_ID | GIVR_IT_REXC))
|
||
|
sx_receive_exc(bp);
|
||
|
else
|
||
|
printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n",
|
||
|
board_No(bp), status, ack);
|
||
|
|
||
|
} else if (status & SRSR_TREQint) {
|
||
|
ack = sx_in(bp, CD186x_TRAR);
|
||
|
|
||
|
if (ack == (SX_ID | GIVR_IT_TX))
|
||
|
sx_transmit(bp);
|
||
|
else
|
||
|
printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n",
|
||
|
board_No(bp), status, ack, port_No (sx_get_port (bp, "Int")));
|
||
|
} else if (status & SRSR_MREQint) {
|
||
|
ack = sx_in(bp, CD186x_MRAR);
|
||
|
|
||
|
if (ack == (SX_ID | GIVR_IT_MODEM))
|
||
|
sx_check_modem(bp);
|
||
|
else
|
||
|
printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n",
|
||
|
board_No(bp), status, ack);
|
||
|
|
||
|
}
|
||
|
|
||
|
sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */
|
||
|
}
|
||
|
bp->reg = saved_reg;
|
||
|
outb (bp->reg, bp->base + SX_ADDR_REG);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
func_exit();
|
||
|
return IRQ_HANDLED;
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Routines for open & close processing.
|
||
|
*/
|
||
|
|
||
|
static void turn_ints_off (struct specialix_board *bp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
if (bp->flags & SX_BOARD_IS_PCI) {
|
||
|
/* This was intended for enabeling the interrupt on the
|
||
|
* PCI card. However it seems that it's already enabled
|
||
|
* and as PCI interrupts can be shared, there is no real
|
||
|
* reason to have to turn it off. */
|
||
|
}
|
||
|
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
(void) sx_in_off (bp, 0); /* Turn off interrupts. */
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
static void turn_ints_on (struct specialix_board *bp)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (bp->flags & SX_BOARD_IS_PCI) {
|
||
|
/* play with the PCI chip. See comment above. */
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
(void) sx_in (bp, 0); /* Turn ON interrupts. */
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
/* Called with disabled interrupts */
|
||
|
static inline int sx_setup_board(struct specialix_board * bp)
|
||
|
{
|
||
|
int error;
|
||
|
|
||
|
if (bp->flags & SX_BOARD_ACTIVE)
|
||
|
return 0;
|
||
|
|
||
|
if (bp->flags & SX_BOARD_IS_PCI)
|
||
|
error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT | SA_SHIRQ, "specialix IO8+", bp);
|
||
|
else
|
||
|
error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp);
|
||
|
|
||
|
if (error)
|
||
|
return error;
|
||
|
|
||
|
turn_ints_on (bp);
|
||
|
bp->flags |= SX_BOARD_ACTIVE;
|
||
|
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
/* Called with disabled interrupts */
|
||
|
static inline void sx_shutdown_board(struct specialix_board *bp)
|
||
|
{
|
||
|
func_enter();
|
||
|
|
||
|
if (!(bp->flags & SX_BOARD_ACTIVE)) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp->flags &= ~SX_BOARD_ACTIVE;
|
||
|
|
||
|
dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n",
|
||
|
bp->irq, board_No (bp));
|
||
|
free_irq(bp->irq, bp);
|
||
|
|
||
|
turn_ints_off (bp);
|
||
|
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* Setting up port characteristics.
|
||
|
* Must be called with disabled interrupts
|
||
|
*/
|
||
|
static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
unsigned long baud;
|
||
|
long tmp;
|
||
|
unsigned char cor1 = 0, cor3 = 0;
|
||
|
unsigned char mcor1 = 0, mcor2 = 0;
|
||
|
static unsigned long again;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (!(tty = port->tty) || !tty->termios) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
port->IER = 0;
|
||
|
port->COR2 = 0;
|
||
|
/* Select port on the board */
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
|
||
|
/* The Specialix board doens't implement the RTS lines.
|
||
|
They are used to set the IRQ level. Don't touch them. */
|
||
|
if (SX_CRTSCTS(tty))
|
||
|
port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
|
||
|
else
|
||
|
port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR);
|
||
|
baud = C_BAUD(tty);
|
||
|
|
||
|
if (baud & CBAUDEX) {
|
||
|
baud &= ~CBAUDEX;
|
||
|
if (baud < 1 || baud > 2)
|
||
|
port->tty->termios->c_cflag &= ~CBAUDEX;
|
||
|
else
|
||
|
baud += 15;
|
||
|
}
|
||
|
if (baud == 15) {
|
||
|
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
|
||
|
baud ++;
|
||
|
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
|
||
|
baud += 2;
|
||
|
}
|
||
|
|
||
|
|
||
|
if (!baud_table[baud]) {
|
||
|
/* Drop DTR & exit */
|
||
|
dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n");
|
||
|
if (!SX_CRTSCTS (tty)) {
|
||
|
port -> MSVR &= ~ MSVR_DTR;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_MSVR, port->MSVR );
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
}
|
||
|
else
|
||
|
dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n");
|
||
|
return;
|
||
|
} else {
|
||
|
/* Set DTR on */
|
||
|
if (!SX_CRTSCTS (tty)) {
|
||
|
port ->MSVR |= MSVR_DTR;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Now we must calculate some speed depended things
|
||
|
*/
|
||
|
|
||
|
/* Set baud rate for port */
|
||
|
tmp = port->custom_divisor ;
|
||
|
if ( tmp )
|
||
|
printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n"
|
||
|
"This is an untested option, please be carefull.\n",
|
||
|
port_No (port), tmp);
|
||
|
else
|
||
|
tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] +
|
||
|
CD186x_TPC/2) / CD186x_TPC);
|
||
|
|
||
|
if ((tmp < 0x10) && time_before(again, jiffies)) {
|
||
|
again = jiffies + HZ * 60;
|
||
|
/* Page 48 of version 2.0 of the CL-CD1865 databook */
|
||
|
if (tmp >= 12) {
|
||
|
printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
|
||
|
"Performance degradation is possible.\n"
|
||
|
"Read specialix.txt for more info.\n",
|
||
|
port_No (port), tmp);
|
||
|
} else {
|
||
|
printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
|
||
|
"Warning: overstressing Cirrus chip. "
|
||
|
"This might not work.\n"
|
||
|
"Read specialix.txt for more info.\n",
|
||
|
port_No (port), tmp);
|
||
|
}
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff);
|
||
|
sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff);
|
||
|
sx_out(bp, CD186x_RBPRL, tmp & 0xff);
|
||
|
sx_out(bp, CD186x_TBPRL, tmp & 0xff);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
if (port->custom_divisor) {
|
||
|
baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor;
|
||
|
baud = ( baud + 5 ) / 10;
|
||
|
} else
|
||
|
baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */
|
||
|
|
||
|
/* Two timer ticks seems enough to wakeup something like SLIP driver */
|
||
|
tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO;
|
||
|
port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
|
||
|
SERIAL_XMIT_SIZE - 1 : tmp);
|
||
|
|
||
|
/* Receiver timeout will be transmission time for 1.5 chars */
|
||
|
tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud;
|
||
|
tmp = (tmp > 0xff) ? 0xff : tmp;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_RTPR, tmp);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
switch (C_CSIZE(tty)) {
|
||
|
case CS5:
|
||
|
cor1 |= COR1_5BITS;
|
||
|
break;
|
||
|
case CS6:
|
||
|
cor1 |= COR1_6BITS;
|
||
|
break;
|
||
|
case CS7:
|
||
|
cor1 |= COR1_7BITS;
|
||
|
break;
|
||
|
case CS8:
|
||
|
cor1 |= COR1_8BITS;
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
if (C_CSTOPB(tty))
|
||
|
cor1 |= COR1_2SB;
|
||
|
|
||
|
cor1 |= COR1_IGNORE;
|
||
|
if (C_PARENB(tty)) {
|
||
|
cor1 |= COR1_NORMPAR;
|
||
|
if (C_PARODD(tty))
|
||
|
cor1 |= COR1_ODDP;
|
||
|
if (I_INPCK(tty))
|
||
|
cor1 &= ~COR1_IGNORE;
|
||
|
}
|
||
|
/* Set marking of some errors */
|
||
|
port->mark_mask = RCSR_OE | RCSR_TOUT;
|
||
|
if (I_INPCK(tty))
|
||
|
port->mark_mask |= RCSR_FE | RCSR_PE;
|
||
|
if (I_BRKINT(tty) || I_PARMRK(tty))
|
||
|
port->mark_mask |= RCSR_BREAK;
|
||
|
if (I_IGNPAR(tty))
|
||
|
port->mark_mask &= ~(RCSR_FE | RCSR_PE);
|
||
|
if (I_IGNBRK(tty)) {
|
||
|
port->mark_mask &= ~RCSR_BREAK;
|
||
|
if (I_IGNPAR(tty))
|
||
|
/* Real raw mode. Ignore all */
|
||
|
port->mark_mask &= ~RCSR_OE;
|
||
|
}
|
||
|
/* Enable Hardware Flow Control */
|
||
|
if (C_CRTSCTS(tty)) {
|
||
|
#ifdef SPECIALIX_BRAIN_DAMAGED_CTS
|
||
|
port->IER |= IER_DSR | IER_CTS;
|
||
|
mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
|
||
|
mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR));
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
#else
|
||
|
port->COR2 |= COR2_CTSAE;
|
||
|
#endif
|
||
|
}
|
||
|
/* Enable Software Flow Control. FIXME: I'm not sure about this */
|
||
|
/* Some people reported that it works, but I still doubt it */
|
||
|
if (I_IXON(tty)) {
|
||
|
port->COR2 |= COR2_TXIBE;
|
||
|
cor3 |= (COR3_FCT | COR3_SCDE);
|
||
|
if (I_IXANY(tty))
|
||
|
port->COR2 |= COR2_IXM;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_SCHR1, START_CHAR(tty));
|
||
|
sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty));
|
||
|
sx_out(bp, CD186x_SCHR3, START_CHAR(tty));
|
||
|
sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty));
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
}
|
||
|
if (!C_CLOCAL(tty)) {
|
||
|
/* Enable CD check */
|
||
|
port->IER |= IER_CD;
|
||
|
mcor1 |= MCOR1_CDZD;
|
||
|
mcor2 |= MCOR2_CDOD;
|
||
|
}
|
||
|
|
||
|
if (C_CREAD(tty))
|
||
|
/* Enable receiver */
|
||
|
port->IER |= IER_RXD;
|
||
|
|
||
|
/* Set input FIFO size (1-8 bytes) */
|
||
|
cor3 |= sx_rxfifo;
|
||
|
/* Setting up CD186x channel registers */
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_COR1, cor1);
|
||
|
sx_out(bp, CD186x_COR2, port->COR2);
|
||
|
sx_out(bp, CD186x_COR3, cor3);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
/* Make CD186x know about registers change */
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
|
||
|
/* Setting up modem option registers */
|
||
|
dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2);
|
||
|
sx_out(bp, CD186x_MCOR1, mcor1);
|
||
|
sx_out(bp, CD186x_MCOR2, mcor2);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
/* Enable CD186x transmitter & receiver */
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN);
|
||
|
/* Enable interrupts */
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
/* And finally set the modem lines... */
|
||
|
sx_out(bp, CD186x_MSVR, port->MSVR);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
/* Must be called with interrupts enabled */
|
||
|
static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port)
|
||
|
{
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (port->flags & ASYNC_INITIALIZED) {
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
if (!port->xmit_buf) {
|
||
|
/* We may sleep in get_zeroed_page() */
|
||
|
unsigned long tmp;
|
||
|
|
||
|
if (!(tmp = get_zeroed_page(GFP_KERNEL))) {
|
||
|
func_exit();
|
||
|
return -ENOMEM;
|
||
|
}
|
||
|
|
||
|
if (port->xmit_buf) {
|
||
|
free_page(tmp);
|
||
|
func_exit();
|
||
|
return -ERESTARTSYS;
|
||
|
}
|
||
|
port->xmit_buf = (unsigned char *) tmp;
|
||
|
}
|
||
|
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
|
||
|
if (port->tty)
|
||
|
clear_bit(TTY_IO_ERROR, &port->tty->flags);
|
||
|
|
||
|
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
|
||
|
sx_change_speed(bp, port);
|
||
|
port->flags |= ASYNC_INITIALIZED;
|
||
|
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
/* Must be called with interrupts disabled */
|
||
|
static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port)
|
||
|
{
|
||
|
struct tty_struct *tty;
|
||
|
int i;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (!(port->flags & ASYNC_INITIALIZED)) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (sx_debug & SX_DEBUG_FIFO) {
|
||
|
dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ",
|
||
|
board_No(bp), port_No(port), port->overrun);
|
||
|
for (i = 0; i < 10; i++) {
|
||
|
dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]);
|
||
|
}
|
||
|
dprintk(SX_DEBUG_FIFO, "].\n");
|
||
|
}
|
||
|
|
||
|
if (port->xmit_buf) {
|
||
|
free_page((unsigned long) port->xmit_buf);
|
||
|
port->xmit_buf = NULL;
|
||
|
}
|
||
|
|
||
|
/* Select port */
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
|
||
|
if (!(tty = port->tty) || C_HUPCL(tty)) {
|
||
|
/* Drop DTR */
|
||
|
sx_out(bp, CD186x_MSVDTR, 0);
|
||
|
}
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
/* Reset port */
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_SOFTRESET);
|
||
|
/* Disable all interrupts from this port */
|
||
|
port->IER = 0;
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
if (tty)
|
||
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
||
|
port->flags &= ~ASYNC_INITIALIZED;
|
||
|
|
||
|
if (!bp->count)
|
||
|
sx_shutdown_board(bp);
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static int block_til_ready(struct tty_struct *tty, struct file * filp,
|
||
|
struct specialix_port *port)
|
||
|
{
|
||
|
DECLARE_WAITQUEUE(wait, current);
|
||
|
struct specialix_board *bp = port_Board(port);
|
||
|
int retval;
|
||
|
int do_clocal = 0;
|
||
|
int CD;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
/*
|
||
|
* If the device is in the middle of being closed, then block
|
||
|
* until it's done, and then try again.
|
||
|
*/
|
||
|
if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) {
|
||
|
interruptible_sleep_on(&port->close_wait);
|
||
|
if (port->flags & ASYNC_HUP_NOTIFY) {
|
||
|
func_exit();
|
||
|
return -EAGAIN;
|
||
|
} else {
|
||
|
func_exit();
|
||
|
return -ERESTARTSYS;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* If non-blocking mode is set, or the port is not enabled,
|
||
|
* then make the check up front and then exit.
|
||
|
*/
|
||
|
if ((filp->f_flags & O_NONBLOCK) ||
|
||
|
(tty->flags & (1 << TTY_IO_ERROR))) {
|
||
|
port->flags |= ASYNC_NORMAL_ACTIVE;
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
if (C_CLOCAL(tty))
|
||
|
do_clocal = 1;
|
||
|
|
||
|
/*
|
||
|
* Block waiting for the carrier detect and the line to become
|
||
|
* free (i.e., not in use by the callout). While we are in
|
||
|
* this loop, info->count is dropped by one, so that
|
||
|
* rs_close() knows when to free things. We restore it upon
|
||
|
* exit, either normal or abnormal.
|
||
|
*/
|
||
|
retval = 0;
|
||
|
add_wait_queue(&port->open_wait, &wait);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
if (!tty_hung_up_p(filp)) {
|
||
|
port->count--;
|
||
|
}
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
port->blocked_open++;
|
||
|
while (1) {
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
CD = sx_in(bp, CD186x_MSVR) & MSVR_CD;
|
||
|
if (SX_CRTSCTS (tty)) {
|
||
|
/* Activate RTS */
|
||
|
port->MSVR |= MSVR_DTR; /* WTF? */
|
||
|
sx_out (bp, CD186x_MSVR, port->MSVR);
|
||
|
} else {
|
||
|
/* Activate DTR */
|
||
|
port->MSVR |= MSVR_DTR;
|
||
|
sx_out (bp, CD186x_MSVR, port->MSVR);
|
||
|
}
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
set_current_state(TASK_INTERRUPTIBLE);
|
||
|
if (tty_hung_up_p(filp) ||
|
||
|
!(port->flags & ASYNC_INITIALIZED)) {
|
||
|
if (port->flags & ASYNC_HUP_NOTIFY)
|
||
|
retval = -EAGAIN;
|
||
|
else
|
||
|
retval = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
if (!(port->flags & ASYNC_CLOSING) &&
|
||
|
(do_clocal || CD))
|
||
|
break;
|
||
|
if (signal_pending(current)) {
|
||
|
retval = -ERESTARTSYS;
|
||
|
break;
|
||
|
}
|
||
|
schedule();
|
||
|
}
|
||
|
|
||
|
set_current_state(TASK_RUNNING);
|
||
|
remove_wait_queue(&port->open_wait, &wait);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
if (!tty_hung_up_p(filp)) {
|
||
|
port->count++;
|
||
|
}
|
||
|
port->blocked_open--;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
if (retval) {
|
||
|
func_exit();
|
||
|
return retval;
|
||
|
}
|
||
|
|
||
|
port->flags |= ASYNC_NORMAL_ACTIVE;
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_open(struct tty_struct * tty, struct file * filp)
|
||
|
{
|
||
|
int board;
|
||
|
int error;
|
||
|
struct specialix_port * port;
|
||
|
struct specialix_board * bp;
|
||
|
int i;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
board = SX_BOARD(tty->index);
|
||
|
|
||
|
if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) {
|
||
|
func_exit();
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
bp = &sx_board[board];
|
||
|
port = sx_port + board * SX_NPORT + SX_PORT(tty->index);
|
||
|
port->overrun = 0;
|
||
|
for (i = 0; i < 10; i++)
|
||
|
port->hits[i]=0;
|
||
|
|
||
|
dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n",
|
||
|
board, bp, port, SX_PORT(tty->index));
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_open")) {
|
||
|
func_enter();
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
if ((error = sx_setup_board(bp))) {
|
||
|
func_exit();
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
port->count++;
|
||
|
bp->count++;
|
||
|
tty->driver_data = port;
|
||
|
port->tty = tty;
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
if ((error = sx_setup_port(bp, port))) {
|
||
|
func_enter();
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
if ((error = block_til_ready(tty, filp, port))) {
|
||
|
func_enter();
|
||
|
return error;
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_close(struct tty_struct * tty, struct file * filp)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *) tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
unsigned long timeout;
|
||
|
|
||
|
func_enter();
|
||
|
if (!port || sx_paranoia_check(port, tty->name, "close")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
|
||
|
if (tty_hung_up_p(filp)) {
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
if ((tty->count == 1) && (port->count != 1)) {
|
||
|
printk(KERN_ERR "sx%d: sx_close: bad port count;"
|
||
|
" tty->count is 1, port count is %d\n",
|
||
|
board_No(bp), port->count);
|
||
|
port->count = 1;
|
||
|
}
|
||
|
|
||
|
if (port->count > 1) {
|
||
|
port->count--;
|
||
|
bp->count--;
|
||
|
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
port->flags |= ASYNC_CLOSING;
|
||
|
/*
|
||
|
* Now we wait for the transmit buffer to clear; and we notify
|
||
|
* the line discipline to only process XON/XOFF characters.
|
||
|
*/
|
||
|
tty->closing = 1;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
dprintk (SX_DEBUG_OPEN, "Closing\n");
|
||
|
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) {
|
||
|
tty_wait_until_sent(tty, port->closing_wait);
|
||
|
}
|
||
|
/*
|
||
|
* At this point we stop accepting input. To do this, we
|
||
|
* disable the receive line status interrupts, and tell the
|
||
|
* interrupt driver to stop checking the data ready bit in the
|
||
|
* line status register.
|
||
|
*/
|
||
|
dprintk (SX_DEBUG_OPEN, "Closed\n");
|
||
|
port->IER &= ~IER_RXD;
|
||
|
if (port->flags & ASYNC_INITIALIZED) {
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
port->IER |= IER_TXEMPTY;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
/*
|
||
|
* Before we drop DTR, make sure the UART transmitter
|
||
|
* has completely drained; this is especially
|
||
|
* important if there is a transmit FIFO!
|
||
|
*/
|
||
|
timeout = jiffies+HZ;
|
||
|
while(port->IER & IER_TXEMPTY) {
|
||
|
set_current_state (TASK_INTERRUPTIBLE);
|
||
|
msleep_interruptible(jiffies_to_msecs(port->timeout));
|
||
|
if (time_after(jiffies, timeout)) {
|
||
|
printk (KERN_INFO "Timeout waiting for close\n");
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
}
|
||
|
|
||
|
if (--bp->count < 0) {
|
||
|
printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n",
|
||
|
board_No(bp), bp->count, tty->index);
|
||
|
bp->count = 0;
|
||
|
}
|
||
|
if (--port->count < 0) {
|
||
|
printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n",
|
||
|
board_No(bp), port_No(port), port->count);
|
||
|
port->count = 0;
|
||
|
}
|
||
|
|
||
|
sx_shutdown_port(bp, port);
|
||
|
if (tty->driver->flush_buffer)
|
||
|
tty->driver->flush_buffer(tty);
|
||
|
tty_ldisc_flush(tty);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
tty->closing = 0;
|
||
|
port->event = 0;
|
||
|
port->tty = NULL;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
if (port->blocked_open) {
|
||
|
if (port->close_delay) {
|
||
|
msleep_interruptible(jiffies_to_msecs(port->close_delay));
|
||
|
}
|
||
|
wake_up_interruptible(&port->open_wait);
|
||
|
}
|
||
|
port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
||
|
wake_up_interruptible(&port->close_wait);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_write(struct tty_struct * tty,
|
||
|
const unsigned char *buf, int count)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
int c, total = 0;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_write")) {
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
if (!tty || !port->xmit_buf || !tmp_buf) {
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
while (1) {
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
|
||
|
SERIAL_XMIT_SIZE - port->xmit_head));
|
||
|
if (c <= 0) {
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
break;
|
||
|
}
|
||
|
memcpy(port->xmit_buf + port->xmit_head, buf, c);
|
||
|
port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
|
||
|
port->xmit_cnt += c;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
buf += c;
|
||
|
count -= c;
|
||
|
total += c;
|
||
|
}
|
||
|
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
|
||
|
!(port->IER & IER_TXRDY)) {
|
||
|
port->IER |= IER_TXRDY;
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
}
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
func_exit();
|
||
|
|
||
|
return total;
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_put_char(struct tty_struct * tty, unsigned char ch)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board * bp;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_put_char")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf);
|
||
|
if (!tty || !port->xmit_buf) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
bp = port_Board(port);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
|
||
|
dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf);
|
||
|
if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) {
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
dprintk (SX_DEBUG_TX, "Exit size\n");
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf);
|
||
|
port->xmit_buf[port->xmit_head++] = ch;
|
||
|
port->xmit_head &= SERIAL_XMIT_SIZE - 1;
|
||
|
port->xmit_cnt++;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_flush_chars(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board * bp = port_Board(port);
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
|
||
|
!port->xmit_buf) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
port->IER |= IER_TXRDY;
|
||
|
sx_out(port_Board(port), CD186x_CAR, port_No(port));
|
||
|
sx_out(port_Board(port), CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_write_room(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
int ret;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_write_room")) {
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
|
||
|
if (ret < 0)
|
||
|
ret = 0;
|
||
|
|
||
|
func_exit();
|
||
|
return ret;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_chars_in_buffer(struct tty_struct *tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) {
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
func_exit();
|
||
|
return port->xmit_cnt;
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_flush_buffer(struct tty_struct *tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board * bp;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
tty_wakeup(tty);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_tiocmget(struct tty_struct *tty, struct file *file)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board * bp;
|
||
|
unsigned char status;
|
||
|
unsigned int result;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, __FUNCTION__)) {
|
||
|
func_exit();
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
spin_lock_irqsave (&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
status = sx_in(bp, CD186x_MSVR);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n",
|
||
|
port_No(port), status, sx_in (bp, CD186x_CAR));
|
||
|
dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port);
|
||
|
if (SX_CRTSCTS(port->tty)) {
|
||
|
result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */
|
||
|
| ((status & MSVR_DTR) ? TIOCM_RTS : 0)
|
||
|
| ((status & MSVR_CD) ? TIOCM_CAR : 0)
|
||
|
|/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */
|
||
|
| ((status & MSVR_CTS) ? TIOCM_CTS : 0);
|
||
|
} else {
|
||
|
result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */
|
||
|
| ((status & MSVR_DTR) ? TIOCM_DTR : 0)
|
||
|
| ((status & MSVR_CD) ? TIOCM_CAR : 0)
|
||
|
|/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */
|
||
|
| ((status & MSVR_CTS) ? TIOCM_CTS : 0);
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
|
||
|
return result;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_tiocmset(struct tty_struct *tty, struct file *file,
|
||
|
unsigned int set, unsigned int clear)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board *bp;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, __FUNCTION__)) {
|
||
|
func_exit();
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
/* if (set & TIOCM_RTS)
|
||
|
port->MSVR |= MSVR_RTS; */
|
||
|
/* if (set & TIOCM_DTR)
|
||
|
port->MSVR |= MSVR_DTR; */
|
||
|
|
||
|
if (SX_CRTSCTS(port->tty)) {
|
||
|
if (set & TIOCM_RTS)
|
||
|
port->MSVR |= MSVR_DTR;
|
||
|
} else {
|
||
|
if (set & TIOCM_DTR)
|
||
|
port->MSVR |= MSVR_DTR;
|
||
|
}
|
||
|
|
||
|
/* if (clear & TIOCM_RTS)
|
||
|
port->MSVR &= ~MSVR_RTS; */
|
||
|
/* if (clear & TIOCM_DTR)
|
||
|
port->MSVR &= ~MSVR_DTR; */
|
||
|
if (SX_CRTSCTS(port->tty)) {
|
||
|
if (clear & TIOCM_RTS)
|
||
|
port->MSVR &= ~MSVR_DTR;
|
||
|
} else {
|
||
|
if (clear & TIOCM_DTR)
|
||
|
port->MSVR &= ~MSVR_DTR;
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_MSVR, port->MSVR);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline void sx_send_break(struct specialix_port * port, unsigned long length)
|
||
|
{
|
||
|
struct specialix_board *bp = port_Board(port);
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
spin_lock_irqsave (&port->lock, flags);
|
||
|
port->break_length = SPECIALIX_TPS / HZ * length;
|
||
|
port->COR2 |= COR2_ETC;
|
||
|
port->IER |= IER_TXRDY;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_COR2, port->COR2);
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
spin_unlock_irqrestore (&port->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_CORCHG2);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline int sx_set_serial_info(struct specialix_port * port,
|
||
|
struct serial_struct __user * newinfo)
|
||
|
{
|
||
|
struct serial_struct tmp;
|
||
|
struct specialix_board *bp = port_Board(port);
|
||
|
int change_speed;
|
||
|
|
||
|
func_enter();
|
||
|
/*
|
||
|
error = verify_area(VERIFY_READ, (void *) newinfo, sizeof(tmp));
|
||
|
if (error) {
|
||
|
func_exit();
|
||
|
return error;
|
||
|
}
|
||
|
*/
|
||
|
if (copy_from_user(&tmp, newinfo, sizeof(tmp))) {
|
||
|
func_enter();
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
|
||
|
#if 0
|
||
|
if ((tmp.irq != bp->irq) ||
|
||
|
(tmp.port != bp->base) ||
|
||
|
(tmp.type != PORT_CIRRUS) ||
|
||
|
(tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) ||
|
||
|
(tmp.custom_divisor != 0) ||
|
||
|
(tmp.xmit_fifo_size != CD186x_NFIFO) ||
|
||
|
(tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) {
|
||
|
func_exit();
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
change_speed = ((port->flags & ASYNC_SPD_MASK) !=
|
||
|
(tmp.flags & ASYNC_SPD_MASK));
|
||
|
change_speed |= (tmp.custom_divisor != port->custom_divisor);
|
||
|
|
||
|
if (!capable(CAP_SYS_ADMIN)) {
|
||
|
if ((tmp.close_delay != port->close_delay) ||
|
||
|
(tmp.closing_wait != port->closing_wait) ||
|
||
|
((tmp.flags & ~ASYNC_USR_MASK) !=
|
||
|
(port->flags & ~ASYNC_USR_MASK))) {
|
||
|
func_exit();
|
||
|
return -EPERM;
|
||
|
}
|
||
|
port->flags = ((port->flags & ~ASYNC_USR_MASK) |
|
||
|
(tmp.flags & ASYNC_USR_MASK));
|
||
|
port->custom_divisor = tmp.custom_divisor;
|
||
|
} else {
|
||
|
port->flags = ((port->flags & ~ASYNC_FLAGS) |
|
||
|
(tmp.flags & ASYNC_FLAGS));
|
||
|
port->close_delay = tmp.close_delay;
|
||
|
port->closing_wait = tmp.closing_wait;
|
||
|
port->custom_divisor = tmp.custom_divisor;
|
||
|
}
|
||
|
if (change_speed) {
|
||
|
sx_change_speed(bp, port);
|
||
|
}
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static inline int sx_get_serial_info(struct specialix_port * port,
|
||
|
struct serial_struct __user *retinfo)
|
||
|
{
|
||
|
struct serial_struct tmp;
|
||
|
struct specialix_board *bp = port_Board(port);
|
||
|
// int error;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
/*
|
||
|
error = verify_area(VERIFY_WRITE, (void *) retinfo, sizeof(tmp));
|
||
|
if (error)
|
||
|
return error;
|
||
|
*/
|
||
|
|
||
|
memset(&tmp, 0, sizeof(tmp));
|
||
|
tmp.type = PORT_CIRRUS;
|
||
|
tmp.line = port - sx_port;
|
||
|
tmp.port = bp->base;
|
||
|
tmp.irq = bp->irq;
|
||
|
tmp.flags = port->flags;
|
||
|
tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC;
|
||
|
tmp.close_delay = port->close_delay * HZ/100;
|
||
|
tmp.closing_wait = port->closing_wait * HZ/100;
|
||
|
tmp.custom_divisor = port->custom_divisor;
|
||
|
tmp.xmit_fifo_size = CD186x_NFIFO;
|
||
|
if (copy_to_user(retinfo, &tmp, sizeof(tmp))) {
|
||
|
func_exit();
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static int sx_ioctl(struct tty_struct * tty, struct file * filp,
|
||
|
unsigned int cmd, unsigned long arg)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
int retval;
|
||
|
void __user *argp = (void __user *)arg;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_ioctl")) {
|
||
|
func_exit();
|
||
|
return -ENODEV;
|
||
|
}
|
||
|
|
||
|
switch (cmd) {
|
||
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
||
|
retval = tty_check_change(tty);
|
||
|
if (retval) {
|
||
|
func_exit();
|
||
|
return retval;
|
||
|
}
|
||
|
tty_wait_until_sent(tty, 0);
|
||
|
if (!arg)
|
||
|
sx_send_break(port, HZ/4); /* 1/4 second */
|
||
|
return 0;
|
||
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
||
|
retval = tty_check_change(tty);
|
||
|
if (retval) {
|
||
|
func_exit();
|
||
|
return retval;
|
||
|
}
|
||
|
tty_wait_until_sent(tty, 0);
|
||
|
sx_send_break(port, arg ? arg*(HZ/10) : HZ/4);
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
case TIOCGSOFTCAR:
|
||
|
if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) {
|
||
|
func_exit();
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
case TIOCSSOFTCAR:
|
||
|
if (get_user(arg, (unsigned long __user *) argp)) {
|
||
|
func_exit();
|
||
|
return -EFAULT;
|
||
|
}
|
||
|
tty->termios->c_cflag =
|
||
|
((tty->termios->c_cflag & ~CLOCAL) |
|
||
|
(arg ? CLOCAL : 0));
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
case TIOCGSERIAL:
|
||
|
func_exit();
|
||
|
return sx_get_serial_info(port, argp);
|
||
|
case TIOCSSERIAL:
|
||
|
func_exit();
|
||
|
return sx_set_serial_info(port, argp);
|
||
|
default:
|
||
|
func_exit();
|
||
|
return -ENOIOCTLCMD;
|
||
|
}
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_throttle(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_throttle")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
/* Use DTR instead of RTS ! */
|
||
|
if (SX_CRTSCTS (tty))
|
||
|
port->MSVR &= ~MSVR_DTR;
|
||
|
else {
|
||
|
/* Auch!!! I think the system shouldn't call this then. */
|
||
|
/* Or maybe we're supposed (allowed?) to do our side of hw
|
||
|
handshake anyway, even when hardware handshake is off.
|
||
|
When you see this in your logs, please report.... */
|
||
|
printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n",
|
||
|
port_No (port));
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
if (I_IXOFF(tty)) {
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_SSCH2);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_MSVR, port->MSVR);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_unthrottle(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
/* XXXX Use DTR INSTEAD???? */
|
||
|
if (SX_CRTSCTS(tty)) {
|
||
|
port->MSVR |= MSVR_DTR;
|
||
|
} /* Else clause: see remark in "sx_throttle"... */
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
if (I_IXOFF(tty)) {
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CCR, CCR_SSCH1);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
sx_wait_CCR(bp);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
}
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_MSVR, port->MSVR);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_stop(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_stop")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
port->IER &= ~IER_TXRDY;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_start(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_start")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
|
||
|
port->IER |= IER_TXRDY;
|
||
|
spin_lock_irqsave(&bp->lock, flags);
|
||
|
sx_out(bp, CD186x_CAR, port_No(port));
|
||
|
sx_out(bp, CD186x_IER, port->IER);
|
||
|
spin_unlock_irqrestore(&bp->lock, flags);
|
||
|
}
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
/*
|
||
|
* This routine is called from the work-queue when the interrupt
|
||
|
* routine has signalled that a hangup has occurred. The path of
|
||
|
* hangup processing is:
|
||
|
*
|
||
|
* serial interrupt routine -> (workqueue) ->
|
||
|
* do_sx_hangup() -> tty->hangup() -> sx_hangup()
|
||
|
*
|
||
|
*/
|
||
|
static void do_sx_hangup(void *private_)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *) private_;
|
||
|
struct tty_struct *tty;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
tty = port->tty;
|
||
|
if (tty)
|
||
|
tty_hangup(tty); /* FIXME: module removal race here */
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_hangup(struct tty_struct * tty)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
struct specialix_board *bp;
|
||
|
unsigned long flags;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_hangup")) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
|
||
|
sx_shutdown_port(bp, port);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
port->event = 0;
|
||
|
bp->count -= port->count;
|
||
|
if (bp->count < 0) {
|
||
|
printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n",
|
||
|
board_No(bp), bp->count, tty->index);
|
||
|
bp->count = 0;
|
||
|
}
|
||
|
port->count = 0;
|
||
|
port->flags &= ~ASYNC_NORMAL_ACTIVE;
|
||
|
port->tty = NULL;
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
wake_up_interruptible(&port->open_wait);
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
|
||
|
static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *)tty->driver_data;
|
||
|
unsigned long flags;
|
||
|
struct specialix_board * bp;
|
||
|
|
||
|
if (sx_paranoia_check(port, tty->name, "sx_set_termios"))
|
||
|
return;
|
||
|
|
||
|
if (tty->termios->c_cflag == old_termios->c_cflag &&
|
||
|
tty->termios->c_iflag == old_termios->c_iflag)
|
||
|
return;
|
||
|
|
||
|
bp = port_Board(port);
|
||
|
spin_lock_irqsave(&port->lock, flags);
|
||
|
sx_change_speed(port_Board(port), port);
|
||
|
spin_unlock_irqrestore(&port->lock, flags);
|
||
|
|
||
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
||
|
!(tty->termios->c_cflag & CRTSCTS)) {
|
||
|
tty->hw_stopped = 0;
|
||
|
sx_start(tty);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
|
||
|
static void do_softint(void *private_)
|
||
|
{
|
||
|
struct specialix_port *port = (struct specialix_port *) private_;
|
||
|
struct tty_struct *tty;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
if(!(tty = port->tty)) {
|
||
|
func_exit();
|
||
|
return;
|
||
|
}
|
||
|
|
||
|
if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
|
||
|
tty_wakeup(tty);
|
||
|
//wake_up_interruptible(&tty->write_wait);
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
static struct tty_operations sx_ops = {
|
||
|
.open = sx_open,
|
||
|
.close = sx_close,
|
||
|
.write = sx_write,
|
||
|
.put_char = sx_put_char,
|
||
|
.flush_chars = sx_flush_chars,
|
||
|
.write_room = sx_write_room,
|
||
|
.chars_in_buffer = sx_chars_in_buffer,
|
||
|
.flush_buffer = sx_flush_buffer,
|
||
|
.ioctl = sx_ioctl,
|
||
|
.throttle = sx_throttle,
|
||
|
.unthrottle = sx_unthrottle,
|
||
|
.set_termios = sx_set_termios,
|
||
|
.stop = sx_stop,
|
||
|
.start = sx_start,
|
||
|
.hangup = sx_hangup,
|
||
|
.tiocmget = sx_tiocmget,
|
||
|
.tiocmset = sx_tiocmset,
|
||
|
};
|
||
|
|
||
|
static int sx_init_drivers(void)
|
||
|
{
|
||
|
int error;
|
||
|
int i;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT);
|
||
|
if (!specialix_driver) {
|
||
|
printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n");
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) {
|
||
|
printk(KERN_ERR "sx: Couldn't get free page.\n");
|
||
|
put_tty_driver(specialix_driver);
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
specialix_driver->owner = THIS_MODULE;
|
||
|
specialix_driver->name = "ttyW";
|
||
|
specialix_driver->major = SPECIALIX_NORMAL_MAJOR;
|
||
|
specialix_driver->type = TTY_DRIVER_TYPE_SERIAL;
|
||
|
specialix_driver->subtype = SERIAL_TYPE_NORMAL;
|
||
|
specialix_driver->init_termios = tty_std_termios;
|
||
|
specialix_driver->init_termios.c_cflag =
|
||
|
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
|
||
|
specialix_driver->flags = TTY_DRIVER_REAL_RAW;
|
||
|
tty_set_operations(specialix_driver, &sx_ops);
|
||
|
|
||
|
if ((error = tty_register_driver(specialix_driver))) {
|
||
|
put_tty_driver(specialix_driver);
|
||
|
free_page((unsigned long)tmp_buf);
|
||
|
printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n",
|
||
|
error);
|
||
|
func_exit();
|
||
|
return 1;
|
||
|
}
|
||
|
memset(sx_port, 0, sizeof(sx_port));
|
||
|
for (i = 0; i < SX_NPORT * SX_NBOARD; i++) {
|
||
|
sx_port[i].magic = SPECIALIX_MAGIC;
|
||
|
INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]);
|
||
|
INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]);
|
||
|
sx_port[i].close_delay = 50 * HZ/100;
|
||
|
sx_port[i].closing_wait = 3000 * HZ/100;
|
||
|
init_waitqueue_head(&sx_port[i].open_wait);
|
||
|
init_waitqueue_head(&sx_port[i].close_wait);
|
||
|
spin_lock_init(&sx_port[i].lock);
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static void sx_release_drivers(void)
|
||
|
{
|
||
|
func_enter();
|
||
|
|
||
|
free_page((unsigned long)tmp_buf);
|
||
|
tty_unregister_driver(specialix_driver);
|
||
|
put_tty_driver(specialix_driver);
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* This routine must be called by kernel at boot time
|
||
|
*/
|
||
|
static int __init specialix_init(void)
|
||
|
{
|
||
|
int i;
|
||
|
int found = 0;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n");
|
||
|
printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
|
||
|
#ifdef CONFIG_SPECIALIX_RTSCTS
|
||
|
printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
|
||
|
#else
|
||
|
printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
|
||
|
#endif
|
||
|
|
||
|
for (i = 0; i < SX_NBOARD; i++)
|
||
|
sx_board[i].lock = SPIN_LOCK_UNLOCKED;
|
||
|
|
||
|
if (sx_init_drivers()) {
|
||
|
func_exit();
|
||
|
return -EIO;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < SX_NBOARD; i++)
|
||
|
if (sx_board[i].base && !sx_probe(&sx_board[i]))
|
||
|
found++;
|
||
|
|
||
|
#ifdef CONFIG_PCI
|
||
|
{
|
||
|
struct pci_dev *pdev = NULL;
|
||
|
|
||
|
i=0;
|
||
|
while (i < SX_NBOARD) {
|
||
|
if (sx_board[i].flags & SX_BOARD_PRESENT) {
|
||
|
i++;
|
||
|
continue;
|
||
|
}
|
||
|
pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX,
|
||
|
PCI_DEVICE_ID_SPECIALIX_IO8,
|
||
|
pdev);
|
||
|
if (!pdev) break;
|
||
|
|
||
|
if (pci_enable_device(pdev))
|
||
|
continue;
|
||
|
|
||
|
sx_board[i].irq = pdev->irq;
|
||
|
|
||
|
sx_board[i].base = pci_resource_start (pdev, 2);
|
||
|
|
||
|
sx_board[i].flags |= SX_BOARD_IS_PCI;
|
||
|
if (!sx_probe(&sx_board[i]))
|
||
|
found ++;
|
||
|
}
|
||
|
}
|
||
|
#endif
|
||
|
|
||
|
if (!found) {
|
||
|
sx_release_drivers();
|
||
|
printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n");
|
||
|
func_exit();
|
||
|
return -EIO;
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
return 0;
|
||
|
}
|
||
|
|
||
|
static int iobase[SX_NBOARD] = {0,};
|
||
|
|
||
|
static int irq [SX_NBOARD] = {0,};
|
||
|
|
||
|
module_param_array(iobase, int, NULL, 0);
|
||
|
module_param_array(irq, int, NULL, 0);
|
||
|
module_param(sx_debug, int, 0);
|
||
|
module_param(sx_rxfifo, int, 0);
|
||
|
#ifdef SPECIALIX_TIMER
|
||
|
module_param(sx_poll, int, 0);
|
||
|
#endif
|
||
|
|
||
|
/*
|
||
|
* You can setup up to 4 boards.
|
||
|
* by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter.
|
||
|
* You should specify the IRQs too in that case "irq=....,...".
|
||
|
*
|
||
|
* More than 4 boards in one computer is not possible, as the card can
|
||
|
* only use 4 different interrupts.
|
||
|
*
|
||
|
*/
|
||
|
static int __init specialix_init_module(void)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
init_MUTEX(&tmp_buf_sem); /* Init de the semaphore - pvdl */
|
||
|
|
||
|
if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) {
|
||
|
for(i = 0; i < SX_NBOARD; i++) {
|
||
|
sx_board[i].base = iobase[i];
|
||
|
sx_board[i].irq = irq[i];
|
||
|
sx_board[i].count= 0;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func_exit();
|
||
|
|
||
|
return specialix_init();
|
||
|
}
|
||
|
|
||
|
static void __exit specialix_exit_module(void)
|
||
|
{
|
||
|
int i;
|
||
|
|
||
|
func_enter();
|
||
|
|
||
|
sx_release_drivers();
|
||
|
for (i = 0; i < SX_NBOARD; i++)
|
||
|
if (sx_board[i].flags & SX_BOARD_PRESENT)
|
||
|
sx_release_io_range(&sx_board[i]);
|
||
|
#ifdef SPECIALIX_TIMER
|
||
|
del_timer (&missed_irq_timer);
|
||
|
#endif
|
||
|
|
||
|
func_exit();
|
||
|
}
|
||
|
|
||
|
module_init(specialix_init_module);
|
||
|
module_exit(specialix_exit_module);
|
||
|
|
||
|
MODULE_LICENSE("GPL");
|