path: root/net/irda/ircomm/ircomm_tty.c

/*********************************************************************
 *
 * Filename:      ircomm_tty.c
 * Version:       1.0
 * Description:   IrCOMM serial TTY driver
 * Status:        Experimental.
 * Author:        Dag Brattli <dagb@cs.uit.no>
 * Created at:    Sun Jun  6 21:00:56 1999
 * Modified at:   Wed Feb 23 00:09:02 2000
 * Modified by:   Dag Brattli <dagb@cs.uit.no>
 * Sources:       serial.c and previous IrCOMM work by Takahide Higuchi
 *
 *     Copyright (c) 1999-2000 Dag Brattli, All Rights Reserved.
 *     Copyright (c) 2000-2003 Jean Tourrilhes <jt@hpl.hp.com>
 *
 *     This program is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of
 *     the License, or (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program; if not, write to the Free Software
 *     Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *     MA 02111-1307 USA
 *
 ********************************************************************/

#include <linux/init.h>
#include <linux/module.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/seq_file.h>
#include <linux/termios.h>
#include <linux/tty.h>
#include <linux/tty_flip.h>
#include <linux/interrupt.h>
#include <linux/device.h>		/* for MODULE_ALIAS_CHARDEV_MAJOR */

#include <asm/uaccess.h>

#include <net/irda/irda.h>
#include <net/irda/irmod.h>

#include <net/irda/ircomm_core.h>
#include <net/irda/ircomm_param.h>
#include <net/irda/ircomm_tty_attach.h>
#include <net/irda/ircomm_tty.h>

static int  ircomm_tty_open(struct tty_struct *tty, struct file *filp);
static void ircomm_tty_close(struct tty_struct * tty, struct file *filp);
static int  ircomm_tty_write(struct tty_struct * tty,
			     const unsigned char *buf, int count);
static int  ircomm_tty_write_room(struct tty_struct *tty);
static void ircomm_tty_throttle(struct tty_struct *tty);
static void ircomm_tty_unthrottle(struct tty_struct *tty);
static int  ircomm_tty_chars_in_buffer(struct tty_struct *tty);
static void ircomm_tty_flush_buffer(struct tty_struct *tty);
static void ircomm_tty_send_xchar(struct tty_struct *tty, char ch);
static void ircomm_tty_wait_until_sent(struct tty_struct *tty, int timeout);
static void ircomm_tty_hangup(struct tty_struct *tty);
static void ircomm_tty_do_softint(struct work_struct *work);
static void ircomm_tty_shutdown(struct ircomm_tty_cb *self);
static void ircomm_tty_stop(struct tty_struct *tty);

static int ircomm_tty_data_indication(void *instance, void *sap,
				      struct sk_buff *skb);
static int ircomm_tty_control_indication(void *instance, void *sap,
					 struct sk_buff *skb);
static void ircomm_tty_flow_indication(void *instance, void *sap,
				       LOCAL_FLOW cmd);
#ifdef CONFIG_PROC_FS
static const struct file_operations ircomm_tty_proc_fops;
#endif /* CONFIG_PROC_FS */
static struct tty_driver *driver;

static hashbin_t *ircomm_tty = NULL;

static const struct tty_operations ops = {
	.open            = ircomm_tty_open,
	.close           = ircomm_tty_close,
	.write           = ircomm_tty_write,
	.write_room      = ircomm_tty_write_room,
	.chars_in_buffer = ircomm_tty_chars_in_buffer,
	.flush_buffer    = ircomm_tty_flush_buffer,
	.ioctl           = ircomm_tty_ioctl,	/* ircomm_tty_ioctl.c */
	.tiocmget        = ircomm_tty_tiocmget,	/* ircomm_tty_ioctl.c */
	.tiocmset        = ircomm_tty_tiocmset,	/* ircomm_tty_ioctl.c */
	.throttle        = ircomm_tty_throttle,
	.unthrottle      = ircomm_tty_unthrottle,
	.send_xchar      = ircomm_tty_send_xchar,
	.set_termios     = ircomm_tty_set_termios,
	.stop            = ircomm_tty_stop,
	.start           = ircomm_tty_start,
	.hangup          = ircomm_tty_hangup,
	.wait_until_sent = ircomm_tty_wait_until_sent,
#ifdef CONFIG_PROC_FS
	.proc_fops       = &ircomm_tty_proc_fops,
#endif /* CONFIG_PROC_FS */
};

/*
 * Function ircomm_tty_init()
 *
 *    Init IrCOMM TTY layer/driver
 *
 */
static int __init ircomm_tty_init(void)
{