2005-04-16 16:20:36 -06:00
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/*********************************************************************
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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* Filename: ircomm_tty.c
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* Version: 1.0
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* Description: IrCOMM serial TTY driver
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* Status: Experimental.
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* Author: Dag Brattli <dagb@cs.uit.no>
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* Created at: Sun Jun 6 21:00:56 1999
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* Modified at: Wed Feb 23 00:09:02 2000
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* Modified by: Dag Brattli <dagb@cs.uit.no>
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* Sources: serial.c and previous IrCOMM work by Takahide Higuchi
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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* Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
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* Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
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2007-02-09 07:24:53 -07:00
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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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2005-04-16 16:20:36 -06:00
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* the License, or (at your option) any later version.
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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2007-02-09 07:24:53 -07:00
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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2005-04-16 16:20:36 -06:00
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* MA 02111-1307 USA
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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********************************************************************/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/fs.h>
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#include <linux/sched.h>
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#include <linux/termios.h>
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#include <linux/tty.h>
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#include <linux/interrupt.h>
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#include <linux/device.h> /* for MODULE_ALIAS_CHARDEV_MAJOR */
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#include <asm/uaccess.h>
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#include <net/irda/irda.h>
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#include <net/irda/irmod.h>
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#include <net/irda/ircomm_core.h>
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#include <net/irda/ircomm_param.h>
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#include <net/irda/ircomm_tty_attach.h>
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#include <net/irda/ircomm_tty.h>
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static int ircomm_tty_open(struct tty_struct *tty, struct file *filp);
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static void ircomm_tty_close(struct tty_struct * tty, struct file *filp);
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static int ircomm_tty_write(struct tty_struct * tty,
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const unsigned char *buf, int count);
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static int ircomm_tty_write_room(struct tty_struct *tty);
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static void ircomm_tty_throttle(struct tty_struct *tty);
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static void ircomm_tty_unthrottle(struct tty_struct *tty);
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static int ircomm_tty_chars_in_buffer(struct tty_struct *tty);
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static void ircomm_tty_flush_buffer(struct tty_struct *tty);
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static void ircomm_tty_send_xchar(struct tty_struct *tty, char ch);
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static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout);
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static void ircomm_tty_hangup(struct tty_struct *tty);
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2006-11-22 07:57:56 -07:00
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static void ircomm_tty_do_softint(struct work_struct *work);
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2005-04-16 16:20:36 -06:00
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static void ircomm_tty_shutdown(struct ircomm_tty_cb *self);
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static void ircomm_tty_stop(struct tty_struct *tty);
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static int ircomm_tty_data_indication(void *instance, void *sap,
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struct sk_buff *skb);
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static int ircomm_tty_control_indication(void *instance, void *sap,
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struct sk_buff *skb);
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2007-02-09 07:24:53 -07:00
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static void ircomm_tty_flow_indication(void *instance, void *sap,
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2005-04-16 16:20:36 -06:00
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LOCAL_FLOW cmd);
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#ifdef CONFIG_PROC_FS
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static int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
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int *eof, void *unused);
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#endif /* CONFIG_PROC_FS */
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static struct tty_driver *driver;
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2007-10-26 04:56:43 -06:00
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static hashbin_t *ircomm_tty = NULL;
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2005-04-16 16:20:36 -06:00
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2006-10-02 03:17:18 -06:00
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static const struct tty_operations ops = {
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2005-04-16 16:20:36 -06:00
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.open = ircomm_tty_open,
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.close = ircomm_tty_close,
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.write = ircomm_tty_write,
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.write_room = ircomm_tty_write_room,
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.chars_in_buffer = ircomm_tty_chars_in_buffer,
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.flush_buffer = ircomm_tty_flush_buffer,
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.ioctl = ircomm_tty_ioctl, /* ircomm_tty_ioctl.c */
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.tiocmget = ircomm_tty_tiocmget, /* ircomm_tty_ioctl.c */
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.tiocmset = ircomm_tty_tiocmset, /* ircomm_tty_ioctl.c */
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.throttle = ircomm_tty_throttle,
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.unthrottle = ircomm_tty_unthrottle,
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.send_xchar = ircomm_tty_send_xchar,
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.set_termios = ircomm_tty_set_termios,
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.stop = ircomm_tty_stop,
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.start = ircomm_tty_start,
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.hangup = ircomm_tty_hangup,
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.wait_until_sent = ircomm_tty_wait_until_sent,
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#ifdef CONFIG_PROC_FS
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.read_proc = ircomm_tty_read_proc,
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#endif /* CONFIG_PROC_FS */
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};
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/*
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* Function ircomm_tty_init()
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*
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* Init IrCOMM TTY layer/driver
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*
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*/
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static int __init ircomm_tty_init(void)
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{
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driver = alloc_tty_driver(IRCOMM_TTY_PORTS);
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if (!driver)
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return -ENOMEM;
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2007-02-09 07:24:53 -07:00
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ircomm_tty = hashbin_new(HB_LOCK);
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2005-04-16 16:20:36 -06:00
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if (ircomm_tty == NULL) {
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IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
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put_tty_driver(driver);
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return -ENOMEM;
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}
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driver->owner = THIS_MODULE;
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driver->driver_name = "ircomm";
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driver->name = "ircomm";
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driver->major = IRCOMM_TTY_MAJOR;
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driver->minor_start = IRCOMM_TTY_MINOR;
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driver->type = TTY_DRIVER_TYPE_SERIAL;
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driver->subtype = SERIAL_TYPE_NORMAL;
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driver->init_termios = tty_std_termios;
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driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
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driver->flags = TTY_DRIVER_REAL_RAW;
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tty_set_operations(driver, &ops);
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if (tty_register_driver(driver)) {
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IRDA_ERROR("%s(): Couldn't register serial driver\n",
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__FUNCTION__);
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put_tty_driver(driver);
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return -1;
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}
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return 0;
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}
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static void __exit __ircomm_tty_cleanup(struct ircomm_tty_cb *self)
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{
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IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return;);
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IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
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ircomm_tty_shutdown(self);
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self->magic = 0;
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kfree(self);
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}
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/*
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* Function ircomm_tty_cleanup ()
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*
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* Remove IrCOMM TTY layer/driver
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*
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*/
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static void __exit ircomm_tty_cleanup(void)
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{
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int ret;
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2007-02-09 07:24:53 -07:00
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IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
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2005-04-16 16:20:36 -06:00
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ret = tty_unregister_driver(driver);
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2007-02-09 07:24:53 -07:00
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if (ret) {
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IRDA_ERROR("%s(), failed to unregister driver\n",
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2005-04-16 16:20:36 -06:00
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__FUNCTION__);
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return;
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}
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hashbin_delete(ircomm_tty, (FREE_FUNC) __ircomm_tty_cleanup);
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put_tty_driver(driver);
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}
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/*
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* Function ircomm_startup (self)
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*
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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*
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*/
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static int ircomm_tty_startup(struct ircomm_tty_cb *self)
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{
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notify_t notify;
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int ret = -ENODEV;
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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IRDA_ASSERT(self != NULL, return -1;);
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IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
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/* Check if already open */
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if (test_and_set_bit(ASYNC_B_INITIALIZED, &self->flags)) {
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IRDA_DEBUG(2, "%s(), already open so break out!\n", __FUNCTION__ );
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return 0;
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}
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/* Register with IrCOMM */
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irda_notify_init(¬ify);
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/* These callbacks we must handle ourselves */
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notify.data_indication = ircomm_tty_data_indication;
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notify.udata_indication = ircomm_tty_control_indication;
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2007-02-09 07:24:53 -07:00
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notify.flow_indication = ircomm_tty_flow_indication;
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2005-04-16 16:20:36 -06:00
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/* Use the ircomm_tty interface for these ones */
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2007-02-09 07:24:53 -07:00
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notify.disconnect_indication = ircomm_tty_disconnect_indication;
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2005-04-16 16:20:36 -06:00
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notify.connect_confirm = ircomm_tty_connect_confirm;
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2007-02-09 07:24:53 -07:00
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notify.connect_indication = ircomm_tty_connect_indication;
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2005-04-16 16:20:36 -06:00
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strlcpy(notify.name, "ircomm_tty", sizeof(notify.name));
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notify.instance = self;
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if (!self->ircomm) {
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2007-02-09 07:24:53 -07:00
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self->ircomm = ircomm_open(¬ify, self->service_type,
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2005-04-16 16:20:36 -06:00
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self->line);
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}
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if (!self->ircomm)
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goto err;
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self->slsap_sel = self->ircomm->slsap_sel;
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/* Connect IrCOMM link with remote device */
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ret = ircomm_tty_attach_cable(self);
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if (ret < 0) {
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IRDA_ERROR("%s(), error attaching cable!\n", __FUNCTION__);
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goto err;
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}
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return 0;
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err:
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clear_bit(ASYNC_B_INITIALIZED, &self->flags);
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return ret;
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}
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/*
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* Function ircomm_block_til_ready (self, filp)
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*
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2007-02-09 07:24:53 -07:00
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*
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2005-04-16 16:20:36 -06:00
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*
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*/
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2007-02-09 07:24:53 -07:00
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static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
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2005-04-16 16:20:36 -06:00
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struct file *filp)
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{
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DECLARE_WAITQUEUE(wait, current);
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int retval;
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int do_clocal = 0, extra_count = 0;
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unsigned long flags;
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struct tty_struct *tty;
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
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tty = self->tty;
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/*
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* If non-blocking mode is set, or the port is not enabled,
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* then make the check up front and then exit.
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2007-02-09 07:24:53 -07:00
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*/
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2005-04-16 16:20:36 -06:00
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if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
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/* nonblock mode is set or port is not enabled */
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self->flags |= ASYNC_NORMAL_ACTIVE;
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IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __FUNCTION__ );
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return 0;
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}
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if (tty->termios->c_cflag & CLOCAL) {
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IRDA_DEBUG(1, "%s(), doing CLOCAL!\n", __FUNCTION__ );
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do_clocal = 1;
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}
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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/* Wait for carrier detect and the line to become
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* free (i.e., not in use by the callout). While we are in
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* this loop, self->open_count is dropped by one, so that
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* mgsl_close() knows when to free things. We restore it upon
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* exit, either normal or abnormal.
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*/
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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retval = 0;
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add_wait_queue(&self->open_wait, &wait);
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n",
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__FILE__,__LINE__, tty->driver->name, self->open_count );
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/* As far as I can see, we protect open_count - Jean II */
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spin_lock_irqsave(&self->spinlock, flags);
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if (!tty_hung_up_p(filp)) {
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extra_count = 1;
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self->open_count--;
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}
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spin_unlock_irqrestore(&self->spinlock, flags);
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self->blocked_open++;
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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while (1) {
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if (tty->termios->c_cflag & CBAUD) {
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/* Here, we use to lock those two guys, but
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* as ircomm_param_request() does it itself,
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* I don't see the point (and I see the deadlock).
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* Jean II */
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self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR;
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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ircomm_param_request(self, IRCOMM_DTE, TRUE);
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}
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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current->state = TASK_INTERRUPTIBLE;
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2007-02-09 07:24:53 -07:00
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2005-04-16 16:20:36 -06:00
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if (tty_hung_up_p(filp) ||
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!test_bit(ASYNC_B_INITIALIZED, &self->flags)) {
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retval = (self->flags & ASYNC_HUP_NOTIFY) ?
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-EAGAIN : -ERESTARTSYS;
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break;
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}
|
2007-02-09 07:24:53 -07:00
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|
|
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Check if link is ready now. Even if CLOCAL is
|
|
|
|
* specified, we cannot return before the IrCOMM link is
|
2007-02-09 07:24:53 -07:00
|
|
|
* ready
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2007-02-09 07:24:53 -07:00
|
|
|
if (!test_bit(ASYNC_B_CLOSING, &self->flags) &&
|
|
|
|
(do_clocal || (self->settings.dce & IRCOMM_CD)) &&
|
2005-04-16 16:20:36 -06:00
|
|
|
self->state == IRCOMM_TTY_READY)
|
|
|
|
{
|
2007-02-09 07:24:53 -07:00
|
|
|
break;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (signal_pending(current)) {
|
|
|
|
retval = -ERESTARTSYS;
|
|
|
|
break;
|
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n",
|
|
|
|
__FILE__,__LINE__, tty->driver->name, self->open_count );
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
schedule();
|
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
__set_current_state(TASK_RUNNING);
|
|
|
|
remove_wait_queue(&self->open_wait, &wait);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (extra_count) {
|
|
|
|
/* ++ is not atomic, so this should be protected - Jean II */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
self->open_count++;
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
}
|
|
|
|
self->blocked_open--;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n",
|
|
|
|
__FILE__,__LINE__, tty->driver->name, self->open_count);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!retval)
|
|
|
|
self->flags |= ASYNC_NORMAL_ACTIVE;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
|
|
|
return retval;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_open (tty, filp)
|
|
|
|
*
|
|
|
|
* This routine is called when a particular tty device is opened. This
|
|
|
|
* routine is mandatory; if this routine is not filled in, the attempted
|
|
|
|
* open will fail with ENODEV.
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self;
|
|
|
|
unsigned int line;
|
|
|
|
unsigned long flags;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
line = tty->index;
|
|
|
|
if ((line < 0) || (line >= IRCOMM_TTY_PORTS)) {
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if instance already exists */
|
|
|
|
self = hashbin_lock_find(ircomm_tty, line, NULL);
|
|
|
|
if (!self) {
|
|
|
|
/* No, so make new instance */
|
2006-07-21 15:51:30 -06:00
|
|
|
self = kzalloc(sizeof(struct ircomm_tty_cb), GFP_KERNEL);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (self == NULL) {
|
|
|
|
IRDA_ERROR("%s(), kmalloc failed!\n", __FUNCTION__);
|
|
|
|
return -ENOMEM;
|
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
self->magic = IRCOMM_TTY_MAGIC;
|
|
|
|
self->flow = FLOW_STOP;
|
|
|
|
|
|
|
|
self->line = line;
|
2006-11-22 07:57:56 -07:00
|
|
|
INIT_WORK(&self->tqueue, ircomm_tty_do_softint);
|
2005-04-16 16:20:36 -06:00
|
|
|
self->max_header_size = IRCOMM_TTY_HDR_UNINITIALISED;
|
|
|
|
self->max_data_size = IRCOMM_TTY_DATA_UNINITIALISED;
|
|
|
|
self->close_delay = 5*HZ/10;
|
|
|
|
self->closing_wait = 30*HZ;
|
|
|
|
|
|
|
|
/* Init some important stuff */
|
|
|
|
init_timer(&self->watchdog_timer);
|
|
|
|
init_waitqueue_head(&self->open_wait);
|
2007-02-09 07:24:53 -07:00
|
|
|
init_waitqueue_head(&self->close_wait);
|
2005-04-16 16:20:36 -06:00
|
|
|
spin_lock_init(&self->spinlock);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Force TTY into raw mode by default which is usually what
|
|
|
|
* we want for IrCOMM and IrLPT. This way applications will
|
2007-02-09 07:24:53 -07:00
|
|
|
* not have to twiddle with printcap etc.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
tty->termios->c_iflag = 0;
|
|
|
|
tty->termios->c_oflag = 0;
|
|
|
|
|
|
|
|
/* Insert into hash */
|
|
|
|
hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL);
|
|
|
|
}
|
|
|
|
/* ++ is not atomic, so this should be protected - Jean II */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
self->open_count++;
|
|
|
|
|
|
|
|
tty->driver_data = self;
|
|
|
|
self->tty = tty;
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __FUNCTION__ , tty->driver->name,
|
2005-04-16 16:20:36 -06:00
|
|
|
self->line, self->open_count);
|
|
|
|
|
|
|
|
/* Not really used by us, but lets do it anyway */
|
|
|
|
self->tty->low_latency = (self->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the port is the middle of closing, bail out now
|
|
|
|
*/
|
|
|
|
if (tty_hung_up_p(filp) ||
|
|
|
|
test_bit(ASYNC_B_CLOSING, &self->flags)) {
|
|
|
|
|
|
|
|
/* Hm, why are we blocking on ASYNC_CLOSING if we
|
|
|
|
* do return -EAGAIN/-ERESTARTSYS below anyway?
|
|
|
|
* IMHO it's either not needed in the first place
|
|
|
|
* or for some reason we need to make sure the async
|
|
|
|
* closing has been finished - if so, wouldn't we
|
|
|
|
* probably better sleep uninterruptible?
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (wait_event_interruptible(self->close_wait, !test_bit(ASYNC_B_CLOSING, &self->flags))) {
|
|
|
|
IRDA_WARNING("%s - got signal while blocking on ASYNC_CLOSING!\n",
|
|
|
|
__FUNCTION__);
|
|
|
|
return -ERESTARTSYS;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef SERIAL_DO_RESTART
|
|
|
|
return ((self->flags & ASYNC_HUP_NOTIFY) ?
|
|
|
|
-EAGAIN : -ERESTARTSYS);
|
|
|
|
#else
|
|
|
|
return -EAGAIN;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if this is a "normal" ircomm device, or an irlpt device */
|
|
|
|
if (line < 0x10) {
|
|
|
|
self->service_type = IRCOMM_3_WIRE | IRCOMM_9_WIRE;
|
|
|
|
self->settings.service_type = IRCOMM_9_WIRE; /* 9 wire as default */
|
|
|
|
/* Jan Kiszka -> add DSR/RI -> Conform to IrCOMM spec */
|
|
|
|
self->settings.dce = IRCOMM_CTS | IRCOMM_CD | IRCOMM_DSR | IRCOMM_RI; /* Default line settings */
|
|
|
|
IRDA_DEBUG(2, "%s(), IrCOMM device\n", __FUNCTION__ );
|
|
|
|
} else {
|
|
|
|
IRDA_DEBUG(2, "%s(), IrLPT device\n", __FUNCTION__ );
|
|
|
|
self->service_type = IRCOMM_3_WIRE_RAW;
|
|
|
|
self->settings.service_type = IRCOMM_3_WIRE_RAW; /* Default */
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = ircomm_tty_startup(self);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = ircomm_tty_block_til_ready(self, filp);
|
|
|
|
if (ret) {
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(2,
|
2005-04-16 16:20:36 -06:00
|
|
|
"%s(), returning after block_til_ready with %d\n", __FUNCTION__ ,
|
|
|
|
ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_close (tty, filp)
|
|
|
|
*
|
|
|
|
* This routine is called when a particular tty device is closed.
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
if (!tty)
|
|
|
|
return;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
|
|
|
|
if (tty_hung_up_p(filp)) {
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s(), returning 1\n", __FUNCTION__ );
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
if ((tty->count == 1) && (self->open_count != 1)) {
|
|
|
|
/*
|
|
|
|
* Uh, oh. tty->count is 1, which means that the tty
|
|
|
|
* structure will be freed. state->count should always
|
|
|
|
* be one in these conditions. If it's greater than
|
|
|
|
* one, we've got real problems, since it means the
|
|
|
|
* serial port won't be shutdown.
|
|
|
|
*/
|
|
|
|
IRDA_DEBUG(0, "%s(), bad serial port count; "
|
2007-02-09 07:24:53 -07:00
|
|
|
"tty->count is 1, state->count is %d\n", __FUNCTION__ ,
|
2005-04-16 16:20:36 -06:00
|
|
|
self->open_count);
|
|
|
|
self->open_count = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (--self->open_count < 0) {
|
|
|
|
IRDA_ERROR("%s(), bad serial port count for ttys%d: %d\n",
|
|
|
|
__FUNCTION__, self->line, self->open_count);
|
|
|
|
self->open_count = 0;
|
|
|
|
}
|
|
|
|
if (self->open_count) {
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s(), open count > 0\n", __FUNCTION__ );
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Hum... Should be test_and_set_bit ??? - Jean II */
|
|
|
|
set_bit(ASYNC_B_CLOSING, &self->flags);
|
|
|
|
|
|
|
|
/* We need to unlock here (we were unlocking at the end of this
|
|
|
|
* function), because tty_wait_until_sent() may schedule.
|
|
|
|
* I don't know if the rest should be protected somehow,
|
|
|
|
* so someone should check. - Jean II */
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
/*
|
2007-02-09 07:24:53 -07:00
|
|
|
* Now we wait for the transmit buffer to clear; and we notify
|
2005-04-16 16:20:36 -06:00
|
|
|
* the line discipline to only process XON/XOFF characters.
|
|
|
|
*/
|
|
|
|
tty->closing = 1;
|
|
|
|
if (self->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
|
|
|
tty_wait_until_sent(tty, self->closing_wait);
|
|
|
|
|
|
|
|
ircomm_tty_shutdown(self);
|
|
|
|
|
|
|
|
if (tty->driver->flush_buffer)
|
|
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
if (tty->ldisc.flush_buffer)
|
|
|
|
tty->ldisc.flush_buffer(tty);
|
|
|
|
|
|
|
|
tty->closing = 0;
|
|
|
|
self->tty = NULL;
|
|
|
|
|
|
|
|
if (self->blocked_open) {
|
2005-09-12 15:15:34 -06:00
|
|
|
if (self->close_delay)
|
|
|
|
schedule_timeout_interruptible(self->close_delay);
|
2005-04-16 16:20:36 -06:00
|
|
|
wake_up_interruptible(&self->open_wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
self->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
|
|
|
|
wake_up_interruptible(&self->close_wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_flush_buffer (tty)
|
|
|
|
*
|
2007-02-09 07:24:53 -07:00
|
|
|
*
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
static void ircomm_tty_flush_buffer(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
|
|
|
* Let do_softint() do this to avoid race condition with
|
|
|
|
* do_softint() ;-)
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
schedule_work(&self->tqueue);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2006-11-22 07:57:56 -07:00
|
|
|
* Function ircomm_tty_do_softint (work)
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
* We use this routine to give the write wakeup to the user at at a
|
2007-02-09 07:24:53 -07:00
|
|
|
* safe time (as fast as possible after write have completed). This
|
2005-04-16 16:20:36 -06:00
|
|
|
* can be compared to the Tx interrupt.
|
|
|
|
*/
|
2006-11-22 07:57:56 -07:00
|
|
|
static void ircomm_tty_do_softint(struct work_struct *work)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
2006-11-22 07:57:56 -07:00
|
|
|
struct ircomm_tty_cb *self =
|
|
|
|
container_of(work, struct ircomm_tty_cb, tqueue);
|
2005-04-16 16:20:36 -06:00
|
|
|
struct tty_struct *tty;
|
|
|
|
unsigned long flags;
|
|
|
|
struct sk_buff *skb, *ctrl_skb;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
if (!self || self->magic != IRCOMM_TTY_MAGIC)
|
|
|
|
return;
|
|
|
|
|
|
|
|
tty = self->tty;
|
|
|
|
if (!tty)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Unlink control buffer */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
|
|
|
|
ctrl_skb = self->ctrl_skb;
|
|
|
|
self->ctrl_skb = NULL;
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
/* Flush control buffer if any */
|
|
|
|
if(ctrl_skb) {
|
|
|
|
if(self->flow == FLOW_START)
|
|
|
|
ircomm_control_request(self->ircomm, ctrl_skb);
|
|
|
|
/* Drop reference count - see ircomm_ttp_data_request(). */
|
|
|
|
dev_kfree_skb(ctrl_skb);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tty->hw_stopped)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* Unlink transmit buffer */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
skb = self->tx_skb;
|
|
|
|
self->tx_skb = NULL;
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
/* Flush transmit buffer if any */
|
|
|
|
if (skb) {
|
|
|
|
ircomm_tty_do_event(self, IRCOMM_TTY_DATA_REQUEST, skb, NULL);
|
|
|
|
/* Drop reference count - see ircomm_ttp_data_request(). */
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Check if user (still) wants to be waken up */
|
2007-02-09 07:24:53 -07:00
|
|
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
|
2005-04-16 16:20:36 -06:00
|
|
|
tty->ldisc.write_wakeup)
|
|
|
|
{
|
|
|
|
(tty->ldisc.write_wakeup)(tty);
|
|
|
|
}
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_write (tty, buf, count)
|
|
|
|
*
|
|
|
|
* This routine is called by the kernel to write a series of characters
|
|
|
|
* to the tty device. The characters may come from user space or kernel
|
|
|
|
* space. This routine will return the number of characters actually
|
|
|
|
* accepted for writing. This routine is mandatory.
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_write(struct tty_struct *tty,
|
|
|
|
const unsigned char *buf, int count)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long flags;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int tailroom = 0;
|
|
|
|
int len = 0;
|
|
|
|
int size;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s(), count=%d, hw_stopped=%d\n", __FUNCTION__ , count,
|
|
|
|
tty->hw_stopped);
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
|
|
|
|
|
|
|
|
/* We may receive packets from the TTY even before we have finished
|
|
|
|
* our setup. Not cool.
|
|
|
|
* The problem is that we don't know the final header and data size
|
|
|
|
* to create the proper skb, so any skb we would create would have
|
|
|
|
* bogus header and data size, so need care.
|
|
|
|
* We use a bogus header size to safely detect this condition.
|
|
|
|
* Another problem is that hw_stopped was set to 0 way before it
|
|
|
|
* should be, so we would drop this skb. It should now be fixed.
|
|
|
|
* One option is to not accept data until we are properly setup.
|
|
|
|
* But, I suspect that when it happens, the ppp line discipline
|
|
|
|
* just "drops" the data, which might screw up connect scripts.
|
|
|
|
* The second option is to create a "safe skb", with large header
|
|
|
|
* and small size (see ircomm_tty_open() for values).
|
|
|
|
* We just need to make sure that when the real values get filled,
|
|
|
|
* we don't mess up the original "safe skb" (see tx_data_size).
|
|
|
|
* Jean II */
|
|
|
|
if (self->max_header_size == IRCOMM_TTY_HDR_UNINITIALISED) {
|
|
|
|
IRDA_DEBUG(1, "%s() : not initialised\n", __FUNCTION__);
|
|
|
|
#ifdef IRCOMM_NO_TX_BEFORE_INIT
|
|
|
|
/* We didn't consume anything, TTY will retry */
|
|
|
|
return 0;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
if (count < 1)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* Protect our manipulation of self->tx_skb and related */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
|
|
|
|
/* Fetch current transmit buffer */
|
|
|
|
skb = self->tx_skb;
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Send out all the data we get, possibly as multiple fragmented
|
|
|
|
* frames, but this will only happen if the data is larger than the
|
|
|
|
* max data size. The normal case however is just the opposite, and
|
|
|
|
* this function may be called multiple times, and will then actually
|
2007-02-09 07:24:53 -07:00
|
|
|
* defragment the data and send it out as one packet as soon as
|
2005-04-16 16:20:36 -06:00
|
|
|
* possible, but at a safer point in time
|
|
|
|
*/
|
|
|
|
while (count) {
|
|
|
|
size = count;
|
|
|
|
|
|
|
|
/* Adjust data size to the max data size */
|
|
|
|
if (size > self->max_data_size)
|
|
|
|
size = self->max_data_size;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Do we already have a buffer ready for transmit, or do
|
2007-02-09 07:24:53 -07:00
|
|
|
* we need to allocate a new frame
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2007-02-09 07:24:53 -07:00
|
|
|
if (skb) {
|
|
|
|
/*
|
|
|
|
* Any room for more data at the end of the current
|
2005-04-16 16:20:36 -06:00
|
|
|
* transmit buffer? Cannot use skb_tailroom, since
|
2007-02-09 07:24:53 -07:00
|
|
|
* dev_alloc_skb gives us a larger skb than we
|
2005-04-16 16:20:36 -06:00
|
|
|
* requested
|
|
|
|
* Note : use tx_data_size, because max_data_size
|
|
|
|
* may have changed and we don't want to overwrite
|
|
|
|
* the skb. - Jean II
|
|
|
|
*/
|
|
|
|
if ((tailroom = (self->tx_data_size - skb->len)) > 0) {
|
|
|
|
/* Adjust data to tailroom */
|
|
|
|
if (size > tailroom)
|
|
|
|
size = tailroom;
|
|
|
|
} else {
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
|
|
|
* Current transmit frame is full, so break
|
2005-04-16 16:20:36 -06:00
|
|
|
* out, so we can send it as soon as possible
|
|
|
|
*/
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
/* Prepare a full sized frame */
|
2006-07-21 15:50:41 -06:00
|
|
|
skb = alloc_skb(self->max_data_size+
|
|
|
|
self->max_header_size,
|
|
|
|
GFP_ATOMIC);
|
2005-04-16 16:20:36 -06:00
|
|
|
if (!skb) {
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
return -ENOBUFS;
|
|
|
|
}
|
|
|
|
skb_reserve(skb, self->max_header_size);
|
|
|
|
self->tx_skb = skb;
|
|
|
|
/* Remember skb size because max_data_size may
|
|
|
|
* change later on - Jean II */
|
|
|
|
self->tx_data_size = self->max_data_size;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy data */
|
|
|
|
memcpy(skb_put(skb,size), buf + len, size);
|
|
|
|
|
|
|
|
count -= size;
|
|
|
|
len += size;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Schedule a new thread which will transmit the frame as soon
|
|
|
|
* as possible, but at a safe point in time. We do this so the
|
|
|
|
* "user" can give us data multiple times, as PPP does (because of
|
|
|
|
* its 256 byte tx buffer). We will then defragment and send out
|
2007-02-09 07:24:53 -07:00
|
|
|
* all this data as one single packet.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
schedule_work(&self->tqueue);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_write_room (tty)
|
|
|
|
*
|
|
|
|
* This routine returns the numbers of characters the tty driver will
|
|
|
|
* accept for queuing to be written. This number is subject to change as
|
|
|
|
* output buffers get emptied, or if the output flow control is acted.
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_write_room(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long flags;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
|
|
|
|
|
|
|
|
#ifdef IRCOMM_NO_TX_BEFORE_INIT
|
|
|
|
/* max_header_size tells us if the channel is initialised or not. */
|
|
|
|
if (self->max_header_size == IRCOMM_TTY_HDR_UNINITIALISED)
|
|
|
|
/* Don't bother us yet */
|
|
|
|
return 0;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Check if we are allowed to transmit any data.
|
|
|
|
* hw_stopped is the regular flow control.
|
|
|
|
* Jean II */
|
|
|
|
if (tty->hw_stopped)
|
|
|
|
ret = 0;
|
|
|
|
else {
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
if (self->tx_skb)
|
|
|
|
ret = self->tx_data_size - self->tx_skb->len;
|
|
|
|
else
|
|
|
|
ret = self->max_data_size;
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
}
|
|
|
|
IRDA_DEBUG(2, "%s(), ret=%d\n", __FUNCTION__ , ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_wait_until_sent (tty, timeout)
|
|
|
|
*
|
|
|
|
* This routine waits until the device has written out all of the
|
|
|
|
* characters in its transmitter FIFO.
|
|
|
|
*/
|
|
|
|
static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long orig_jiffies, poll_time;
|
|
|
|
unsigned long flags;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
orig_jiffies = jiffies;
|
|
|
|
|
|
|
|
/* Set poll time to 200 ms */
|
|
|
|
poll_time = IRDA_MIN(timeout, msecs_to_jiffies(200));
|
|
|
|
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
while (self->tx_skb && self->tx_skb->len) {
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
2005-09-12 15:15:34 -06:00
|
|
|
schedule_timeout_interruptible(poll_time);
|
2005-04-16 16:20:36 -06:00
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
if (signal_pending(current))
|
|
|
|
break;
|
|
|
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
current->state = TASK_RUNNING;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_throttle (tty)
|
|
|
|
*
|
|
|
|
* This routine notifies the tty driver that input buffers for the line
|
|
|
|
* discipline are close to full, and it should somehow signal that no
|
2007-02-09 07:24:53 -07:00
|
|
|
* more characters should be sent to the tty.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
static void ircomm_tty_throttle(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
/* Software flow control? */
|
|
|
|
if (I_IXOFF(tty))
|
|
|
|
ircomm_tty_send_xchar(tty, STOP_CHAR(tty));
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Hardware flow control? */
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
|
|
self->settings.dte &= ~IRCOMM_RTS;
|
|
|
|
self->settings.dte |= IRCOMM_DELTA_RTS;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
ircomm_param_request(self, IRCOMM_DTE, TRUE);
|
|
|
|
}
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
ircomm_flow_request(self->ircomm, FLOW_STOP);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_unthrottle (tty)
|
|
|
|
*
|
|
|
|
* This routine notifies the tty drivers that it should signals that
|
|
|
|
* characters can now be sent to the tty without fear of overrunning the
|
|
|
|
* input buffers of the line disciplines.
|
|
|
|
*/
|
|
|
|
static void ircomm_tty_unthrottle(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
/* Using software flow control? */
|
|
|
|
if (I_IXOFF(tty)) {
|
|
|
|
ircomm_tty_send_xchar(tty, START_CHAR(tty));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Using hardware flow control? */
|
|
|
|
if (tty->termios->c_cflag & CRTSCTS) {
|
|
|
|
self->settings.dte |= (IRCOMM_RTS|IRCOMM_DELTA_RTS);
|
|
|
|
|
|
|
|
ircomm_param_request(self, IRCOMM_DTE, TRUE);
|
|
|
|
IRDA_DEBUG(1, "%s(), FLOW_START\n", __FUNCTION__ );
|
|
|
|
}
|
2007-02-09 07:24:53 -07:00
|
|
|
ircomm_flow_request(self->ircomm, FLOW_START);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_chars_in_buffer (tty)
|
|
|
|
*
|
|
|
|
* Indicates if there are any data in the buffer
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_chars_in_buffer(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long flags;
|
|
|
|
int len = 0;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
|
|
|
|
if (self->tx_skb)
|
|
|
|
len = self->tx_skb->len;
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
return len;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void ircomm_tty_shutdown(struct ircomm_tty_cb *self)
|
|
|
|
{
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
if (!test_and_clear_bit(ASYNC_B_INITIALIZED, &self->flags))
|
|
|
|
return;
|
|
|
|
|
|
|
|
ircomm_tty_detach_cable(self);
|
|
|
|
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
|
|
|
|
del_timer(&self->watchdog_timer);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Free parameter buffer */
|
|
|
|
if (self->ctrl_skb) {
|
|
|
|
dev_kfree_skb(self->ctrl_skb);
|
|
|
|
self->ctrl_skb = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Free transmit buffer */
|
|
|
|
if (self->tx_skb) {
|
|
|
|
dev_kfree_skb(self->tx_skb);
|
|
|
|
self->tx_skb = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (self->ircomm) {
|
|
|
|
ircomm_close(self->ircomm);
|
|
|
|
self->ircomm = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_hangup (tty)
|
|
|
|
*
|
|
|
|
* This routine notifies the tty driver that it should hangup the tty
|
|
|
|
* device.
|
2007-02-09 07:24:53 -07:00
|
|
|
*
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
static void ircomm_tty_hangup(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
if (!tty)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* ircomm_tty_flush_buffer(tty); */
|
|
|
|
ircomm_tty_shutdown(self);
|
|
|
|
|
|
|
|
/* I guess we need to lock here - Jean II */
|
|
|
|
spin_lock_irqsave(&self->spinlock, flags);
|
|
|
|
self->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
|
|
self->tty = NULL;
|
|
|
|
self->open_count = 0;
|
|
|
|
spin_unlock_irqrestore(&self->spinlock, flags);
|
|
|
|
|
|
|
|
wake_up_interruptible(&self->open_wait);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_send_xchar (tty, ch)
|
|
|
|
*
|
|
|
|
* This routine is used to send a high-priority XON/XOFF character to
|
|
|
|
* the device.
|
|
|
|
*/
|
|
|
|
static void ircomm_tty_send_xchar(struct tty_struct *tty, char ch)
|
|
|
|
{
|
|
|
|
IRDA_DEBUG(0, "%s(), not impl\n", __FUNCTION__ );
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_start (tty)
|
|
|
|
*
|
|
|
|
* This routine notifies the tty driver that it resume sending
|
2007-02-09 07:24:53 -07:00
|
|
|
* characters to the tty device.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
|
|
|
void ircomm_tty_start(struct tty_struct *tty)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
|
|
|
|
ircomm_flow_request(self->ircomm, FLOW_START);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_stop (tty)
|
|
|
|
*
|
|
|
|
* This routine notifies the tty driver that it should stop outputting
|
2007-02-09 07:24:53 -07:00
|
|
|
* characters to the tty device.
|
2005-04-16 16:20:36 -06:00
|
|
|
*/
|
2007-02-09 07:24:53 -07:00
|
|
|
static void ircomm_tty_stop(struct tty_struct *tty)
|
2005-04-16 16:20:36 -06:00
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) tty->driver_data;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
ircomm_flow_request(self->ircomm, FLOW_STOP);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_check_modem_status (self)
|
|
|
|
*
|
|
|
|
* Check for any changes in the DCE's line settings. This function should
|
|
|
|
* be called whenever the dce parameter settings changes, to update the
|
|
|
|
* flow control settings and other things
|
|
|
|
*/
|
|
|
|
void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
|
|
|
|
{
|
|
|
|
struct tty_struct *tty;
|
|
|
|
int status;
|
|
|
|
|
|
|
|
IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
tty = self->tty;
|
|
|
|
|
|
|
|
status = self->settings.dce;
|
|
|
|
|
|
|
|
if (status & IRCOMM_DCE_DELTA_ANY) {
|
|
|
|
/*wake_up_interruptible(&self->delta_msr_wait);*/
|
|
|
|
}
|
|
|
|
if ((self->flags & ASYNC_CHECK_CD) && (status & IRCOMM_DELTA_CD)) {
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(2,
|
2005-04-16 16:20:36 -06:00
|
|
|
"%s(), ircomm%d CD now %s...\n", __FUNCTION__ , self->line,
|
|
|
|
(status & IRCOMM_CD) ? "on" : "off");
|
|
|
|
|
|
|
|
if (status & IRCOMM_CD) {
|
|
|
|
wake_up_interruptible(&self->open_wait);
|
|
|
|
} else {
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(2,
|
2005-04-16 16:20:36 -06:00
|
|
|
"%s(), Doing serial hangup..\n", __FUNCTION__ );
|
|
|
|
if (tty)
|
|
|
|
tty_hangup(tty);
|
|
|
|
|
|
|
|
/* Hangup will remote the tty, so better break out */
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (self->flags & ASYNC_CTS_FLOW) {
|
|
|
|
if (tty->hw_stopped) {
|
|
|
|
if (status & IRCOMM_CTS) {
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(2,
|
2005-04-16 16:20:36 -06:00
|
|
|
"%s(), CTS tx start...\n", __FUNCTION__ );
|
|
|
|
tty->hw_stopped = 0;
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
/* Wake up processes blocked on open */
|
|
|
|
wake_up_interruptible(&self->open_wait);
|
|
|
|
|
|
|
|
schedule_work(&self->tqueue);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
if (!(status & IRCOMM_CTS)) {
|
2007-02-09 07:24:53 -07:00
|
|
|
IRDA_DEBUG(2,
|
2005-04-16 16:20:36 -06:00
|
|
|
"%s(), CTS tx stop...\n", __FUNCTION__ );
|
|
|
|
tty->hw_stopped = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_data_indication (instance, sap, skb)
|
|
|
|
*
|
|
|
|
* Handle incoming data, and deliver it to the line discipline
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_data_indication(void *instance, void *sap,
|
|
|
|
struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
|
|
|
|
|
|
|
|
IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
|
|
|
|
IRDA_ASSERT(skb != NULL, return -1;);
|
|
|
|
|
|
|
|
if (!self->tty) {
|
|
|
|
IRDA_DEBUG(0, "%s(), no tty!\n", __FUNCTION__ );
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* If we receive data when hardware is stopped then something is wrong.
|
|
|
|
* We try to poll the peers line settings to check if we are up todate.
|
2007-02-09 07:24:53 -07:00
|
|
|
* Devices like WinCE can do this, and since they don't send any
|
2005-04-16 16:20:36 -06:00
|
|
|
* params, we can just as well declare the hardware for running.
|
|
|
|
*/
|
|
|
|
if (self->tty->hw_stopped && (self->flow == FLOW_START)) {
|
|
|
|
IRDA_DEBUG(0, "%s(), polling for line settings!\n", __FUNCTION__ );
|
|
|
|
ircomm_param_request(self, IRCOMM_POLL, TRUE);
|
|
|
|
|
|
|
|
/* We can just as well declare the hardware for running */
|
|
|
|
ircomm_tty_send_initial_parameters(self);
|
|
|
|
ircomm_tty_link_established(self);
|
|
|
|
}
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
/*
|
2005-04-16 16:20:36 -06:00
|
|
|
* Just give it over to the line discipline. There is no need to
|
2007-02-09 07:24:53 -07:00
|
|
|
* involve the flip buffers, since we are not running in an interrupt
|
2005-04-16 16:20:36 -06:00
|
|
|
* handler
|
|
|
|
*/
|
|
|
|
self->tty->ldisc.receive_buf(self->tty, skb->data, NULL, skb->len);
|
|
|
|
|
|
|
|
/* No need to kfree_skb - see ircomm_ttp_data_indication() */
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_control_indication (instance, sap, skb)
|
|
|
|
*
|
|
|
|
* Parse all incoming parameters (easy!)
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_control_indication(void *instance, void *sap,
|
|
|
|
struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
|
|
|
|
int clen;
|
|
|
|
|
|
|
|
IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
IRDA_ASSERT(self != NULL, return -1;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
|
|
|
|
IRDA_ASSERT(skb != NULL, return -1;);
|
|
|
|
|
|
|
|
clen = skb->data[0];
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
irda_param_extract_all(self, skb->data+1, IRDA_MIN(skb->len-1, clen),
|
2005-04-16 16:20:36 -06:00
|
|
|
&ircomm_param_info);
|
|
|
|
|
|
|
|
/* No need to kfree_skb - see ircomm_control_indication() */
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_flow_indication (instance, sap, cmd)
|
|
|
|
*
|
|
|
|
* This function is called by IrTTP when it wants us to slow down the
|
|
|
|
* transmission of data. We just mark the hardware as stopped, and wait
|
|
|
|
* for IrTTP to notify us that things are OK again.
|
|
|
|
*/
|
2007-02-09 07:24:53 -07:00
|
|
|
static void ircomm_tty_flow_indication(void *instance, void *sap,
|
2005-04-16 16:20:36 -06:00
|
|
|
LOCAL_FLOW cmd)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) instance;
|
|
|
|
struct tty_struct *tty;
|
|
|
|
|
|
|
|
IRDA_ASSERT(self != NULL, return;);
|
|
|
|
IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
|
|
|
|
|
|
|
|
tty = self->tty;
|
|
|
|
|
|
|
|
switch (cmd) {
|
|
|
|
case FLOW_START:
|
|
|
|
IRDA_DEBUG(2, "%s(), hw start!\n", __FUNCTION__ );
|
|
|
|
tty->hw_stopped = 0;
|
|
|
|
|
|
|
|
/* ircomm_tty_do_softint will take care of the rest */
|
|
|
|
schedule_work(&self->tqueue);
|
|
|
|
break;
|
|
|
|
default: /* If we get here, something is very wrong, better stop */
|
|
|
|
case FLOW_STOP:
|
|
|
|
IRDA_DEBUG(2, "%s(), hw stopped!\n", __FUNCTION__ );
|
|
|
|
tty->hw_stopped = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
self->flow = cmd;
|
|
|
|
}
|
|
|
|
|
2007-12-05 03:18:48 -07:00
|
|
|
#ifdef CONFIG_PROC_FS
|
2005-04-16 16:20:36 -06:00
|
|
|
static int ircomm_tty_line_info(struct ircomm_tty_cb *self, char *buf)
|
|
|
|
{
|
2007-02-09 07:24:53 -07:00
|
|
|
int ret=0;
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "State: %s\n", ircomm_tty_state[self->state]);
|
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Service type: ");
|
|
|
|
if (self->service_type & IRCOMM_9_WIRE)
|
|
|
|
ret += sprintf(buf+ret, "9_WIRE");
|
|
|
|
else if (self->service_type & IRCOMM_3_WIRE)
|
|
|
|
ret += sprintf(buf+ret, "3_WIRE");
|
|
|
|
else if (self->service_type & IRCOMM_3_WIRE_RAW)
|
|
|
|
ret += sprintf(buf+ret, "3_WIRE_RAW");
|
|
|
|
else
|
|
|
|
ret += sprintf(buf+ret, "No common service type!\n");
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Port name: %s\n", self->settings.port_name);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "DTE status: ");
|
|
|
|
if (self->settings.dte & IRCOMM_RTS)
|
|
|
|
ret += sprintf(buf+ret, "RTS|");
|
|
|
|
if (self->settings.dte & IRCOMM_DTR)
|
|
|
|
ret += sprintf(buf+ret, "DTR|");
|
2005-04-16 16:20:36 -06:00
|
|
|
if (self->settings.dte)
|
|
|
|
ret--; /* remove the last | */
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "DCE status: ");
|
2007-02-09 07:24:53 -07:00
|
|
|
if (self->settings.dce & IRCOMM_CTS)
|
|
|
|
ret += sprintf(buf+ret, "CTS|");
|
|
|
|
if (self->settings.dce & IRCOMM_DSR)
|
|
|
|
ret += sprintf(buf+ret, "DSR|");
|
|
|
|
if (self->settings.dce & IRCOMM_CD)
|
|
|
|
ret += sprintf(buf+ret, "CD|");
|
|
|
|
if (self->settings.dce & IRCOMM_RI)
|
|
|
|
ret += sprintf(buf+ret, "RI|");
|
2005-04-16 16:20:36 -06:00
|
|
|
if (self->settings.dce)
|
|
|
|
ret--; /* remove the last | */
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Configuration: ");
|
|
|
|
if (!self->settings.null_modem)
|
|
|
|
ret += sprintf(buf+ret, "DTE <-> DCE\n");
|
|
|
|
else
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret,
|
2005-04-16 16:20:36 -06:00
|
|
|
"DTE <-> DTE (null modem emulation)\n");
|
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Data rate: %d\n", self->settings.data_rate);
|
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Flow control: ");
|
|
|
|
if (self->settings.flow_control & IRCOMM_XON_XOFF_IN)
|
|
|
|
ret += sprintf(buf+ret, "XON_XOFF_IN|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_XON_XOFF_OUT)
|
|
|
|
ret += sprintf(buf+ret, "XON_XOFF_OUT|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_RTS_CTS_IN)
|
|
|
|
ret += sprintf(buf+ret, "RTS_CTS_IN|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_RTS_CTS_OUT)
|
|
|
|
ret += sprintf(buf+ret, "RTS_CTS_OUT|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_DSR_DTR_IN)
|
|
|
|
ret += sprintf(buf+ret, "DSR_DTR_IN|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_DSR_DTR_OUT)
|
|
|
|
ret += sprintf(buf+ret, "DSR_DTR_OUT|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_ENQ_ACK_IN)
|
|
|
|
ret += sprintf(buf+ret, "ENQ_ACK_IN|");
|
|
|
|
if (self->settings.flow_control & IRCOMM_ENQ_ACK_OUT)
|
|
|
|
ret += sprintf(buf+ret, "ENQ_ACK_OUT|");
|
|
|
|
if (self->settings.flow_control)
|
|
|
|
ret--; /* remove the last | */
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "\n");
|
2005-04-16 16:20:36 -06:00
|
|
|
|
|
|
|
ret += sprintf(buf+ret, "Flags: ");
|
|
|
|
if (self->flags & ASYNC_CTS_FLOW)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_CTS_FLOW|");
|
|
|
|
if (self->flags & ASYNC_CHECK_CD)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_CHECK_CD|");
|
|
|
|
if (self->flags & ASYNC_INITIALIZED)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_INITIALIZED|");
|
|
|
|
if (self->flags & ASYNC_LOW_LATENCY)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_LOW_LATENCY|");
|
|
|
|
if (self->flags & ASYNC_CLOSING)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_CLOSING|");
|
|
|
|
if (self->flags & ASYNC_NORMAL_ACTIVE)
|
|
|
|
ret += sprintf(buf+ret, "ASYNC_NORMAL_ACTIVE|");
|
|
|
|
if (self->flags)
|
|
|
|
ret--; /* remove the last | */
|
|
|
|
ret += sprintf(buf+ret, "\n");
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "Role: %s\n", self->client ?
|
2005-04-16 16:20:36 -06:00
|
|
|
"client" : "server");
|
|
|
|
ret += sprintf(buf+ret, "Open count: %d\n", self->open_count);
|
|
|
|
ret += sprintf(buf+ret, "Max data size: %d\n", self->max_data_size);
|
|
|
|
ret += sprintf(buf+ret, "Max header size: %d\n", self->max_header_size);
|
2007-02-09 07:24:53 -07:00
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
if (self->tty)
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "Hardware: %s\n",
|
2005-04-16 16:20:36 -06:00
|
|
|
self->tty->hw_stopped ? "Stopped" : "Running");
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
ret += sprintf(buf+ret, "\n");
|
|
|
|
return ret;
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Function ircomm_tty_read_proc (buf, start, offset, len, eof, unused)
|
|
|
|
*
|
2007-02-09 07:24:53 -07:00
|
|
|
*
|
2005-04-16 16:20:36 -06:00
|
|
|
*
|
|
|
|
*/
|
|
|
|
static int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
|
|
|
|
int *eof, void *unused)
|
|
|
|
{
|
|
|
|
struct ircomm_tty_cb *self;
|
2007-02-09 07:24:53 -07:00
|
|
|
int count = 0, l;
|
|
|
|
off_t begin = 0;
|
2005-04-16 16:20:36 -06:00
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&ircomm_tty->hb_spinlock, flags);
|
|
|
|
|
|
|
|
self = (struct ircomm_tty_cb *) hashbin_get_first(ircomm_tty);
|
|
|
|
while ((self != NULL) && (count < 4000)) {
|
|
|
|
if (self->magic != IRCOMM_TTY_MAGIC)
|
|
|
|
break;
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
l = ircomm_tty_line_info(self, buf + count);
|
|
|
|
count += l;
|
|
|
|
if (count+begin > offset+len)
|
|
|
|
goto done;
|
|
|
|
if (count+begin < offset) {
|
|
|
|
begin += count;
|
|
|
|
count = 0;
|
|
|
|
}
|
|
|
|
|
2005-04-16 16:20:36 -06:00
|
|
|
self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
|
2007-02-09 07:24:53 -07:00
|
|
|
}
|
|
|
|
*eof = 1;
|
2005-04-16 16:20:36 -06:00
|
|
|
done:
|
|
|
|
spin_unlock_irqrestore(&ircomm_tty->hb_spinlock, flags);
|
|
|
|
|
2007-02-09 07:24:53 -07:00
|
|
|
if (offset >= count+begin)
|
|
|
|
return 0;
|
|
|
|
*start = buf + (offset-begin);
|
|
|
|
return ((len < begin+count-offset) ? len : begin+count-offset);
|
2005-04-16 16:20:36 -06:00
|
|
|
}
|
|
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Dag Brattli <dagb@cs.uit.no>");
|
|
|
|
MODULE_DESCRIPTION("IrCOMM serial TTY driver");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_ALIAS_CHARDEV_MAJOR(IRCOMM_TTY_MAJOR);
|
|
|
|
|
|
|
|
module_init(ircomm_tty_init);
|
|
|
|
module_exit(ircomm_tty_cleanup);
|