Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1405 insertions, 0 deletions

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
new file mode 100644
index 0000000..5d1e611
--- /dev/null
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -0,0 +1,1405 @@
+/*********************************************************************
+ *                
+ * 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/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/sched.h>
+#include <linux/termios.h>
+#include <linux/tty.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(void *private_);
+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 int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
+				int *eof, void *unused);
+#endif /* CONFIG_PROC_FS */
+static struct tty_driver *driver;
+
+hashbin_t *ircomm_tty = NULL;
+
+static 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
+	.read_proc       = ircomm_tty_read_proc,
+#endif /* CONFIG_PROC_FS */
+};
+
+/*
+ * Function ircomm_tty_init()
+ *
+ *    Init IrCOMM TTY layer/driver
+ *
+ */
+static int __init ircomm_tty_init(void)
+{
+	driver = alloc_tty_driver(IRCOMM_TTY_PORTS);
+	if (!driver)
+		return -ENOMEM;
+	ircomm_tty = hashbin_new(HB_LOCK); 
+	if (ircomm_tty == NULL) {
+		IRDA_ERROR("%s(), can't allocate hashbin!\n", __FUNCTION__);
+		put_tty_driver(driver);
+		return -ENOMEM;
+	}
+
+	driver->owner		= THIS_MODULE;
+	driver->driver_name     = "ircomm";
+	driver->name            = "ircomm";
+	driver->devfs_name      = "ircomm";
+	driver->major           = IRCOMM_TTY_MAJOR;
+	driver->minor_start     = IRCOMM_TTY_MINOR;
+	driver->type            = TTY_DRIVER_TYPE_SERIAL;
+	driver->subtype         = SERIAL_TYPE_NORMAL;
+	driver->init_termios    = tty_std_termios;
+	driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+	driver->flags           = TTY_DRIVER_REAL_RAW;
+	tty_set_operations(driver, &ops);
+	if (tty_register_driver(driver)) {
+		IRDA_ERROR("%s(): Couldn't register serial driver\n",
+			   __FUNCTION__);
+		put_tty_driver(driver);
+		return -1;
+	}
+	return 0;
+}
+
+static void __exit __ircomm_tty_cleanup(struct ircomm_tty_cb *self)
+{
+	IRDA_DEBUG(0, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
+
+	ircomm_tty_shutdown(self);
+
+	self->magic = 0;
+	kfree(self);
+}
+
+/*
+ * Function ircomm_tty_cleanup ()
+ *
+ *    Remove IrCOMM TTY layer/driver
+ *
+ */
+static void __exit ircomm_tty_cleanup(void)
+{
+	int ret;
+
+	IRDA_DEBUG(4, "%s()\n", __FUNCTION__ );	
+
+	ret = tty_unregister_driver(driver);
+        if (ret) {
+                IRDA_ERROR("%s(), failed to unregister driver\n",
+			   __FUNCTION__);
+		return;
+	}
+
+	hashbin_delete(ircomm_tty, (FREE_FUNC) __ircomm_tty_cleanup);
+	put_tty_driver(driver);
+}
+
+/*
+ * Function ircomm_startup (self)
+ *
+ *    
+ *
+ */
+static int ircomm_tty_startup(struct ircomm_tty_cb *self)
+{
+	notify_t notify;
+	int ret = -ENODEV;
+
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	IRDA_ASSERT(self != NULL, return -1;);
+	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
+
+	/* Check if already open */
+	if (test_and_set_bit(ASYNC_B_INITIALIZED, &self->flags)) {
+		IRDA_DEBUG(2, "%s(), already open so break out!\n", __FUNCTION__ );
+		return 0;
+	}
+
+	/* Register with IrCOMM */
+	irda_notify_init(&notify);
+	/* These callbacks we must handle ourselves */
+	notify.data_indication       = ircomm_tty_data_indication;
+	notify.udata_indication      = ircomm_tty_control_indication;
+ 	notify.flow_indication       = ircomm_tty_flow_indication;
+
+	/* Use the ircomm_tty interface for these ones */
+ 	notify.disconnect_indication = ircomm_tty_disconnect_indication;
+	notify.connect_confirm       = ircomm_tty_connect_confirm;
+ 	notify.connect_indication    = ircomm_tty_connect_indication;
+	strlcpy(notify.name, "ircomm_tty", sizeof(notify.name));
+	notify.instance = self;
+
+	if (!self->ircomm) {
+		self->ircomm = ircomm_open(&notify, self->service_type, 
+					   self->line);
+	}
+	if (!self->ircomm)
+		goto err;
+
+	self->slsap_sel = self->ircomm->slsap_sel;
+
+	/* Connect IrCOMM link with remote device */
+	ret = ircomm_tty_attach_cable(self);
+	if (ret < 0) {
+		IRDA_ERROR("%s(), error attaching cable!\n", __FUNCTION__);
+		goto err;
+	}
+
+	return 0;
+err:
+	clear_bit(ASYNC_B_INITIALIZED, &self->flags);
+	return ret;
+}
+
+/*
+ * Function ircomm_block_til_ready (self, filp)
+ *
+ *    
+ *
+ */
+static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self, 
+				      struct file *filp)
+{
+	DECLARE_WAITQUEUE(wait, current);
+	int		retval;
+	int		do_clocal = 0, extra_count = 0;
+	unsigned long	flags;
+	struct tty_struct *tty;
+	
+	IRDA_DEBUG(2, "%s()\n", __FUNCTION__ );
+
+	tty = self->tty;
+
+	/*
+	 * 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)){
+		/* nonblock mode is set or port is not enabled */
+		self->flags |= ASYNC_NORMAL_ACTIVE;
+		IRDA_DEBUG(1, "%s(), O_NONBLOCK requested!\n", __FUNCTION__ );
+		return 0;
+	}
+
+	if (tty->termios->c_cflag & CLOCAL) {
+		IRDA_DEBUG(1, "%s(), doing CLOCAL!\n", __FUNCTION__ );
+		do_clocal = 1;
+	}
+	
+	/* Wait for carrier detect and the line to become
+	 * free (i.e., not in use by the callout).  While we are in
+	 * this loop, self->open_count is dropped by one, so that
+	 * mgsl_close() knows when to free things.  We restore it upon
+	 * exit, either normal or abnormal.
+	 */
+	 
+	retval = 0;
+	add_wait_queue(&self->open_wait, &wait);
+	
+	IRDA_DEBUG(2, "%s(%d):block_til_ready before block on %s open_count=%d\n",
+	      __FILE__,__LINE__, tty->driver->name, self->open_count );
+
+	/* As far as I can see, we protect open_count - Jean II */
+	spin_lock_irqsave(&self->spinlock, flags);
+	if (!tty_hung_up_p(filp)) {
+		extra_count = 1;
+		self->open_count--;
+	}
+	spin_unlock_irqrestore(&self->spinlock, flags);
+	self->blocked_open++;
+	
+	while (1) {
+		if (tty->termios->c_cflag & CBAUD) {
+			/* Here, we use to lock those two guys, but
+			 * as ircomm_param_request() does it itself,
+			 * I don't see the point (and I see the deadlock).
+			 * Jean II */
+			self->settings.dte |= IRCOMM_RTS + IRCOMM_DTR;
+		 	
+			ircomm_param_request(self, IRCOMM_DTE, TRUE);
+		}
+		
+		current->state = TASK_INTERRUPTIBLE;
+		
+		if (tty_hung_up_p(filp) ||
+		    !test_bit(ASYNC_B_INITIALIZED, &self->flags)) {
+			retval = (self->flags & ASYNC_HUP_NOTIFY) ?
+					-EAGAIN : -ERESTARTSYS;
+			break;
+		}
+		
+		/*  
+		 * Check if link is ready now. Even if CLOCAL is
+		 * specified, we cannot return before the IrCOMM link is
+		 * ready 
+		 */
+ 		if (!test_bit(ASYNC_B_CLOSING, &self->flags) &&
+ 		    (do_clocal || (self->settings.dce & IRCOMM_CD)) &&
+		    self->state == IRCOMM_TTY_READY)
+		{
+ 			break;
+		}
+			
+		if (signal_pending(current)) {
+			retval = -ERESTARTSYS;
+			break;
+		}
+		
+		IRDA_DEBUG(1, "%s(%d):block_til_ready blocking on %s open_count=%d\n",
+		      __FILE__,__LINE__, tty->driver->name, self->open_count );
+		
+		schedule();
+	}
+	
+	__set_current_state(TASK_RUNNING);
+	remove_wait_queue(&self->open_wait, &wait);
+	
+	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--;
+	
+	IRDA_DEBUG(1, "%s(%d):block_til_ready after blocking on %s open_count=%d\n",
+	      __FILE__,__LINE__, tty->driver->name, self->open_count);
+			 
+	if (!retval)
+		self->flags |= ASYNC_NORMAL_ACTIVE;
+		
+	return retval;	
+}
+
+/*
+ * Function ircomm_tty_open (tty, filp)
+ *
+ *    This routine is called when a particular tty device is opened. This
+ *    routine is mandatory; if this routine is not filled in, the attempted
+ *    open will fail with ENODEV.
+ */
+static int ircomm_tty_open(struct tty_struct *tty, struct file *filp)
+{
+	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 */
+		self = kmalloc(sizeof(struct ircomm_tty_cb), GFP_KERNEL);
+		if (self == NULL) {
+			IRDA_ERROR("%s(), kmalloc failed!\n", __FUNCTION__);
+			return -ENOMEM;
+		}
+		memset(self, 0, sizeof(struct ircomm_tty_cb));
+		
+		self->magic = IRCOMM_TTY_MAGIC;
+		self->flow = FLOW_STOP;
+
+		self->line = line;
+		INIT_WORK(&self->tqueue, ircomm_tty_do_softint, self);
+		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);
+ 		init_waitqueue_head(&self->close_wait);
+		spin_lock_init(&self->spinlock);
+
+		/* 
+		 * Force TTY into raw mode by default which is usually what
+		 * we want for IrCOMM and IrLPT. This way applications will
+		 * not have to twiddle with printcap etc.  
+		 */
+		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);
+
+	IRDA_DEBUG(1, "%s(), %s%d, count = %d\n", __FUNCTION__ , tty->driver->name, 
+		   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) {
+		IRDA_DEBUG(2, 
+		      "%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; "
+			   "tty->count is 1, state->count is %d\n", __FUNCTION__ , 
+			   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);
+
+	/*
+	 * Now we wait for the transmit buffer to clear; and we notify 
+	 * the line discipline to only process XON/XOFF characters.
+	 */
+	tty->closing = 1;
+	if (self->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) {
+		if (self->close_delay) {
+			current->state = TASK_INTERRUPTIBLE;
+			schedule_timeout(self->close_delay);
+		}
+		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)
+ *
+ *    
+ *
+ */
+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;);
+
+	/* 
+	 * Let do_softint() do this to avoid race condition with 
+	 * do_softint() ;-) 
+	 */
+	schedule_work(&self->tqueue);
+}
+
+/*
+ * Function ircomm_tty_do_softint (private_)
+ *
+ *    We use this routine to give the write wakeup to the user at at a
+ *    safe time (as fast as possible after write have completed). This 
+ *    can be compared to the Tx interrupt.
+ */
+static void ircomm_tty_do_softint(void *private_)
+{
+	struct ircomm_tty_cb *self = (struct ircomm_tty_cb *) private_;
+	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);
+	
+	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);
+	}
+		
+	/* Check if user (still) wants to be waken up */
+	if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && 
+	    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;
+
+	/*  
+	 * 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
+	 * defragment the data and send it out as one packet as soon as 
+	 * 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;
+		
+		/* 
+		 * Do we already have a buffer ready for transmit, or do
+		 * we need to allocate a new frame 
+		 */
+		if (skb) {			
+			/* 
+			 * Any room for more data at the end of the current 
+			 * transmit buffer? Cannot use skb_tailroom, since
+			 * dev_alloc_skb gives us a larger skb than we 
+			 * 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 {
+				/* 
+				 * Current transmit frame is full, so break 
+				 * out, so we can send it as soon as possible
+				 */
+				break;
+			}
+		} else {
+			/* Prepare a full sized frame */
+			skb = dev_alloc_skb(self->max_data_size+
+					    self->max_header_size);
+			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);
+
+	/*     
+	 * 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
+	 * all this data as one single packet.  
+	 */
+	schedule_work(&self->tqueue);
+	
+	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;
+	
+	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);
+		current->state = TASK_INTERRUPTIBLE;
+		schedule_timeout(poll_time);
+		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
+ *    more characters should be sent to the tty.  
+ */
+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));
+	
+	/* Hardware flow control? */
+	if (tty->termios->c_cflag & CRTSCTS) {
+		self->settings.dte &= ~IRCOMM_RTS;
+		self->settings.dte |= IRCOMM_DELTA_RTS;
+	
+		ircomm_param_request(self, IRCOMM_DTE, TRUE);
+	}
+
+        ircomm_flow_request(self->ircomm, FLOW_STOP);
+}
+
+/*
+ * 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__ );
+	}
+        ircomm_flow_request(self->ircomm, FLOW_START);
+}
+
+/*
+ * 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);
+	
+	/* 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.
+ * 
+ */
+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
+ *    characters to the tty device.  
+ */
+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
+ *     characters to the tty device. 
+ */
+static void ircomm_tty_stop(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;);
+
+	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)) {
+		IRDA_DEBUG(2, 
+			   "%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 {
+			IRDA_DEBUG(2, 
+				   "%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) {
+				IRDA_DEBUG(2, 
+					   "%s(), CTS tx start...\n", __FUNCTION__ );
+				tty->hw_stopped = 0;
+				
+				/* Wake up processes blocked on open */
+				wake_up_interruptible(&self->open_wait);
+
+				schedule_work(&self->tqueue);
+				return;
+			}
+		} else {
+			if (!(status & IRCOMM_CTS)) {
+				IRDA_DEBUG(2, 
+					   "%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__ );
+	
+	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;
+	}
+
+	/* 
+	 * 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.
+	 * Devices like WinCE can do this, and since they don't send any 
+	 * params, we can just as well declare the hardware for running.
+	 */
+	if (self->tty->hw_stopped && (self->flow == FLOW_START)) {
+		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);
+	}
+
+	/* 
+	 * Just give it over to the line discipline. There is no need to
+	 * involve the flip buffers, since we are not running in an interrupt 
+	 * 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__ );
+	
+	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];
+
+	irda_param_extract_all(self, skb->data+1, IRDA_MIN(skb->len-1, clen), 
+			       &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.
+ */
+static void ircomm_tty_flow_indication(void *instance, void *sap, 
+				       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;
+}
+
+static int ircomm_tty_line_info(struct ircomm_tty_cb *self, char *buf)
+{
+        int  ret=0;
+
+	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");
+        ret += sprintf(buf+ret, "\n");
+
+	ret += sprintf(buf+ret, "Port name: %s\n", self->settings.port_name);
+
+	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|");
+	if (self->settings.dte)
+		ret--; /* remove the last | */
+        ret += sprintf(buf+ret, "\n");
+
+	ret += sprintf(buf+ret, "DCE status: ");
+        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|");
+	if (self->settings.dce)
+		ret--; /* remove the last | */
+        ret += sprintf(buf+ret, "\n");
+
+	ret += sprintf(buf+ret, "Configuration: ");
+	if (!self->settings.null_modem)
+		ret += sprintf(buf+ret, "DTE <-> DCE\n");
+	else
+		ret += sprintf(buf+ret, 
+			       "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 | */
+        ret += sprintf(buf+ret, "\n");
+
+	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");
+
+	ret += sprintf(buf+ret, "Role: %s\n", self->client ? 
+		       "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);
+		
+	if (self->tty)
+		ret += sprintf(buf+ret, "Hardware: %s\n", 
+			       self->tty->hw_stopped ? "Stopped" : "Running");
+
+        ret += sprintf(buf+ret, "\n");
+        return ret;
+}
+
+
+/*
+ * Function ircomm_tty_read_proc (buf, start, offset, len, eof, unused)
+ *
+ *    
+ *
+ */
+#ifdef CONFIG_PROC_FS
+static int ircomm_tty_read_proc(char *buf, char **start, off_t offset, int len,
+				int *eof, void *unused)
+{
+	struct ircomm_tty_cb *self;
+        int count = 0, l;
+        off_t begin = 0;
+	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;
+
+                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;
+                }
+				
+		self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
+        }
+        *eof = 1;
+done:
+	spin_unlock_irqrestore(&ircomm_tty->hb_spinlock, flags);
+
+        if (offset >= count+begin)
+                return 0;
+        *start = buf + (offset-begin);
+        return ((len < begin+count-offset) ? len : begin+count-offset);
+}
+#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);