irda: move net/irda/ to drivers/staging/irda/net/

It's time to get rid of IRDA.  It's long been broken, and no one seems
to use it anymore.  So move it to staging and after a while, we can
delete it from there.

To start, move the network irda core from net/irda to
drivers/staging/irda/net/

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 1329 deletions

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
deleted file mode 100644
index ec157c3419b5..000000000000
--- a/net/irda/ircomm/ircomm_tty.c
+++ /dev/null
@@ -1,1329 +0,0 @@
-/*********************************************************************
- *
- * 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, see <http://www.gnu.org/licenses/>.
- *
- ********************************************************************/
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <linux/sched/signal.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 <linux/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_install(struct tty_driver *driver,
-		struct tty_struct *tty);
-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 = {
-	.install	 = ircomm_tty_install,
-	.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 */
-};
-
-static void ircomm_port_raise_dtr_rts(struct tty_port *port, int raise)
-{
-	struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
-			port);
-	/*
-	 * 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
-	 */
-	if (raise)
-		self->settings.dte |= IRCOMM_RTS | IRCOMM_DTR;
-	else
-		self->settings.dte &= ~(IRCOMM_RTS | IRCOMM_DTR);
-
-	ircomm_param_request(self, IRCOMM_DTE, TRUE);
-}
-
-static int ircomm_port_carrier_raised(struct tty_port *port)
-{
-	struct ircomm_tty_cb *self = container_of(port, struct ircomm_tty_cb,
-			port);
-	return self->settings.dce & IRCOMM_CD;
-}
-
-static const struct tty_port_operations ircomm_port_ops = {
-	.dtr_rts = ircomm_port_raise_dtr_rts,
-	.carrier_raised = ircomm_port_carrier_raised,
-};
-
-/*
- * 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) {
-		net_err_ratelimited("%s(), can't allocate hashbin!\n",
-				    __func__);
-		put_tty_driver(driver);
-		return -ENOMEM;
-	}
-
-	driver->driver_name     = "ircomm";
-	driver->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)) {
-		net_err_ratelimited("%s(): Couldn't register serial driver\n",
-				    __func__);
-		put_tty_driver(driver);
-		return -1;
-	}
-	return 0;
-}
-
-static void __exit __ircomm_tty_cleanup(struct ircomm_tty_cb *self)
-{
-	IRDA_ASSERT(self != NULL, return;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
-	ircomm_tty_shutdown(self);
-
-	self->magic = 0;
-	tty_port_destroy(&self->port);
-	kfree(self);
-}
-
-/*
- * Function ircomm_tty_cleanup ()
- *
- *    Remove IrCOMM TTY layer/driver
- *
- */
-static void __exit ircomm_tty_cleanup(void)
-{
-	int ret;
-
-	ret = tty_unregister_driver(driver);
-	if (ret) {
-		net_err_ratelimited("%s(), failed to unregister driver\n",
-				    __func__);
-		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_ASSERT(self != NULL, return -1;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
-
-	/* Check if already open */
-	if (tty_port_initialized(&self->port)) {
-		pr_debug("%s(), already open so break out!\n", __func__);
-		return 0;
-	}
-	tty_port_set_initialized(&self->port, 1);
-
-	/* 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) {
-		net_err_ratelimited("%s(), error attaching cable!\n", __func__);
-		goto err;
-	}
-
-	return 0;
-err:
-	tty_port_set_initialized(&self->port, 0);
-	return ret;
-}
-
-/*
- * Function ircomm_block_til_ready (self, filp)
- *
- *
- *
- */
-static int ircomm_tty_block_til_ready(struct ircomm_tty_cb *self,
-		struct tty_struct *tty, struct file *filp)
-{
-	struct tty_port *port = &self->port;
-	DECLARE_WAITQUEUE(wait, current);
-	int		retval;
-	int		do_clocal = 0;
-	unsigned long	flags;
-
-	/*
-	 * If non-blocking mode is set, or the port is not enabled,
-	 * then make the check up front and then exit.
-	 */
-	if (tty_io_error(tty)) {
-		tty_port_set_active(port, 1);
-		return 0;
-	}
-
-	if (filp->f_flags & O_NONBLOCK) {
-		/* nonblock mode is set */
-		if (C_BAUD(tty))
-			tty_port_raise_dtr_rts(port);
-		tty_port_set_active(port, 1);
-		pr_debug("%s(), O_NONBLOCK requested!\n", __func__);
-		return 0;
-	}
-
-	if (C_CLOCAL(tty)) {
-		pr_debug("%s(), doing CLOCAL!\n", __func__);
-		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, port->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(&port->open_wait, &wait);
-
-	pr_debug("%s(%d):block_til_ready before block on %s open_count=%d\n",
-		 __FILE__, __LINE__, tty->driver->name, port->count);
-
-	spin_lock_irqsave(&port->lock, flags);
-	port->count--;
-	port->blocked_open++;
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	while (1) {
-		if (C_BAUD(tty) && tty_port_initialized(port))
-			tty_port_raise_dtr_rts(port);
-
-		set_current_state(TASK_INTERRUPTIBLE);
-
-		if (tty_hung_up_p(filp) || !tty_port_initialized(port)) {
-			retval = (port->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 ((do_clocal || tty_port_carrier_raised(port)) &&
-		    self->state == IRCOMM_TTY_READY)
-		{
-			break;
-		}
-
-		if (signal_pending(current)) {
-			retval = -ERESTARTSYS;
-			break;
-		}
-
-		pr_debug("%s(%d):block_til_ready blocking on %s open_count=%d\n",
-			 __FILE__, __LINE__, tty->driver->name, port->count);
-
-		schedule();
-	}
-
-	__set_current_state(TASK_RUNNING);
-	remove_wait_queue(&port->open_wait, &wait);
-
-	spin_lock_irqsave(&port->lock, flags);
-	if (!tty_hung_up_p(filp))
-		port->count++;
-	port->blocked_open--;
-	spin_unlock_irqrestore(&port->lock, flags);
-
-	pr_debug("%s(%d):block_til_ready after blocking on %s open_count=%d\n",
-		 __FILE__, __LINE__, tty->driver->name, port->count);
-
-	if (!retval)
-		tty_port_set_active(port, 1);
-
-	return retval;
-}
-
-
-static int ircomm_tty_install(struct tty_driver *driver, struct tty_struct *tty)
-{
-	struct ircomm_tty_cb *self;
-	unsigned int line = tty->index;
-
-	/* Check if instance already exists */
-	self = hashbin_lock_find(ircomm_tty, line, NULL);
-	if (!self) {
-		/* No, so make new instance */
-		self = kzalloc(sizeof(struct ircomm_tty_cb), GFP_KERNEL);
-		if (self == NULL)
-			return -ENOMEM;
-
-		tty_port_init(&self->port);
-		self->port.ops = &ircomm_port_ops;
-		self->magic = IRCOMM_TTY_MAGIC;
-		self->flow = FLOW_STOP;
-
-		self->line = line;
-		INIT_WORK(&self->tqueue, ircomm_tty_do_softint);
-		self->max_header_size = IRCOMM_TTY_HDR_UNINITIALISED;
-		self->max_data_size = IRCOMM_TTY_DATA_UNINITIALISED;
-
-		/* Init some important stuff */
-		init_timer(&self->watchdog_timer);
-		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.
-		 *
-		 * Note this is completely usafe and doesn't work properly
-		 */
-		tty->termios.c_iflag = 0;
-		tty->termios.c_oflag = 0;
-
-		/* Insert into hash */
-		hashbin_insert(ircomm_tty, (irda_queue_t *) self, line, NULL);
-	}
-
-	tty->driver_data = self;
-
-	return tty_port_install(&self->port, driver, tty);
-}
-
-/*
- * 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 = tty->driver_data;
-	unsigned long	flags;
-	int ret;
-
-	/* ++ is not atomic, so this should be protected - Jean II */
-	spin_lock_irqsave(&self->port.lock, flags);
-	self->port.count++;
-	spin_unlock_irqrestore(&self->port.lock, flags);
-	tty_port_tty_set(&self->port, tty);
-
-	pr_debug("%s(), %s%d, count = %d\n", __func__ , tty->driver->name,
-		 self->line, self->port.count);
-
-	/* Not really used by us, but lets do it anyway */
-	self->port.low_latency = (self->port.flags & ASYNC_LOW_LATENCY) ? 1 : 0;
-
-	/* Check if this is a "normal" ircomm device, or an irlpt device */
-	if (self->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 */
-		pr_debug("%s(), IrCOMM device\n", __func__);
-	} else {
-		pr_debug("%s(), IrLPT device\n", __func__);
-		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, tty, filp);
-	if (ret) {
-		pr_debug("%s(), returning after block_til_ready with %d\n",
-			 __func__, 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;
-	struct tty_port *port = &self->port;
-
-	IRDA_ASSERT(self != NULL, return;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
-	if (tty_port_close_start(port, tty, filp) == 0)
-		return;
-
-	ircomm_tty_shutdown(self);
-
-	tty_driver_flush_buffer(tty);
-
-	tty_port_close_end(port, tty);
-	tty_port_tty_set(port, NULL);
-}
-
-/*
- * 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 (work)
- *
- *    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(struct work_struct *work)
-{
-	struct ircomm_tty_cb *self =
-		container_of(work, struct ircomm_tty_cb, tqueue);
-	struct tty_struct *tty;
-	unsigned long flags;
-	struct sk_buff *skb, *ctrl_skb;
-
-	if (!self || self->magic != IRCOMM_TTY_MAGIC)
-		return;
-
-	tty = tty_port_tty_get(&self->port);
-	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)
-		goto put;
-
-	/* 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 */
-	tty_wakeup(tty);
-put:
-	tty_kref_put(tty);
-}
-
-/*
- * 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;
-
-	pr_debug("%s(), count=%d, hw_stopped=%d\n", __func__ , 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) {
-		pr_debug("%s() : not initialised\n", __func__);
-#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 = alloc_skb(self->max_data_size+
-					self->max_header_size,
-					GFP_ATOMIC);
-			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 */
-		skb_put_data(skb, 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);
-	}
-	pr_debug("%s(), ret=%d\n", __func__ , 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_ASSERT(self != NULL, return;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
-	orig_jiffies = jiffies;
-
-	/* Set poll time to 200 ms */
-	poll_time = msecs_to_jiffies(200);
-	if (timeout)
-		poll_time = min_t(unsigned long, timeout, poll_time);
-
-	spin_lock_irqsave(&self->spinlock, flags);
-	while (self->tx_skb && self->tx_skb->len) {
-		spin_unlock_irqrestore(&self->spinlock, flags);
-		schedule_timeout_interruptible(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);
-	__set_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_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 (C_CRTSCTS(tty)) {
-		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_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 (C_CRTSCTS(tty)) {
-		self->settings.dte |= (IRCOMM_RTS|IRCOMM_DELTA_RTS);
-
-		ircomm_param_request(self, IRCOMM_DTE, TRUE);
-		pr_debug("%s(), FLOW_START\n", __func__);
-	}
-	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;);
-
-	if (!tty_port_initialized(&self->port))
-		return;
-	tty_port_set_initialized(&self->port, 0);
-
-	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;
-	struct tty_port *port = &self->port;
-	unsigned long	flags;
-
-	IRDA_ASSERT(self != NULL, return;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
-	/* ircomm_tty_flush_buffer(tty); */
-	ircomm_tty_shutdown(self);
-
-	spin_lock_irqsave(&port->lock, flags);
-	if (port->tty) {
-		set_bit(TTY_IO_ERROR, &port->tty->flags);
-		tty_kref_put(port->tty);
-	}
-	port->tty = NULL;
-	port->count = 0;
-	spin_unlock_irqrestore(&port->lock, flags);
-	tty_port_set_active(port, 0);
-
-	wake_up_interruptible(&port->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)
-{
-	pr_debug("%s(), not impl\n", __func__);
-}
-
-/*
- * 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_ASSERT(self != NULL, return;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return;);
-
-	tty = tty_port_tty_get(&self->port);
-
-	status = self->settings.dce;
-
-	if (status & IRCOMM_DCE_DELTA_ANY) {
-		/*wake_up_interruptible(&self->delta_msr_wait);*/
-	}
-	if (tty_port_check_carrier(&self->port) && (status & IRCOMM_DELTA_CD)) {
-		pr_debug("%s(), ircomm%d CD now %s...\n", __func__ , self->line,
-			 (status & IRCOMM_CD) ? "on" : "off");
-
-		if (status & IRCOMM_CD) {
-			wake_up_interruptible(&self->port.open_wait);
-		} else {
-			pr_debug("%s(), Doing serial hangup..\n", __func__);
-			if (tty)
-				tty_hangup(tty);
-
-			/* Hangup will remote the tty, so better break out */
-			goto put;
-		}
-	}
-	if (tty && tty_port_cts_enabled(&self->port)) {
-		if (tty->hw_stopped) {
-			if (status & IRCOMM_CTS) {
-				pr_debug("%s(), CTS tx start...\n", __func__);
-				tty->hw_stopped = 0;
-
-				/* Wake up processes blocked on open */
-				wake_up_interruptible(&self->port.open_wait);
-
-				schedule_work(&self->tqueue);
-				goto put;
-			}
-		} else {
-			if (!(status & IRCOMM_CTS)) {
-				pr_debug("%s(), CTS tx stop...\n", __func__);
-				tty->hw_stopped = 1;
-			}
-		}
-	}
-put:
-	tty_kref_put(tty);
-}
-
-/*
- * 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;
-	struct tty_struct *tty;
-
-	IRDA_ASSERT(self != NULL, return -1;);
-	IRDA_ASSERT(self->magic == IRCOMM_TTY_MAGIC, return -1;);
-	IRDA_ASSERT(skb != NULL, return -1;);
-
-	tty = tty_port_tty_get(&self->port);
-	if (!tty) {
-		pr_debug("%s(), no tty!\n", __func__);
-		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 (tty->hw_stopped && (self->flow == FLOW_START)) {
-		pr_debug("%s(), polling for line settings!\n", __func__);
-		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);
-	}
-	tty_kref_put(tty);
-
-	/*
-	 * Use flip buffer functions since the code may be called from interrupt
-	 * context
-	 */
-	tty_insert_flip_string(&self->port, skb->data, skb->len);
-	tty_flip_buffer_push(&self->port);
-
-	/* 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_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 = tty_port_tty_get(&self->port);
-
-	switch (cmd) {
-	case FLOW_START:
-		pr_debug("%s(), hw start!\n", __func__);
-		if (tty)
-			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:
-		pr_debug("%s(), hw stopped!\n", __func__);
-		if (tty)
-			tty->hw_stopped = 1;
-		break;
-	}
-
-	tty_kref_put(tty);
-	self->flow = cmd;
-}
-
-#ifdef CONFIG_PROC_FS
-static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
-{
-	struct tty_struct *tty;
-	char sep;
-
-	seq_printf(m, "State: %s\n", ircomm_tty_state[self->state]);
-
-	seq_puts(m, "Service type: ");
-	if (self->service_type & IRCOMM_9_WIRE)
-		seq_puts(m, "9_WIRE");
-	else if (self->service_type & IRCOMM_3_WIRE)
-		seq_puts(m, "3_WIRE");
-	else if (self->service_type & IRCOMM_3_WIRE_RAW)
-		seq_puts(m, "3_WIRE_RAW");
-	else
-		seq_puts(m, "No common service type!\n");
-	seq_putc(m, '\n');
-
-	seq_printf(m, "Port name: %s\n", self->settings.port_name);
-
-	seq_printf(m, "DTE status:");
-	sep = ' ';
-	if (self->settings.dte & IRCOMM_RTS) {
-		seq_printf(m, "%cRTS", sep);
-		sep = '|';
-	}
-	if (self->settings.dte & IRCOMM_DTR) {
-		seq_printf(m, "%cDTR", sep);
-		sep = '|';
-	}
-	seq_putc(m, '\n');
-
-	seq_puts(m, "DCE status:");
-	sep = ' ';
-	if (self->settings.dce & IRCOMM_CTS) {
-		seq_printf(m, "%cCTS", sep);
-		sep = '|';
-	}
-	if (self->settings.dce & IRCOMM_DSR) {
-		seq_printf(m, "%cDSR", sep);
-		sep = '|';
-	}
-	if (self->settings.dce & IRCOMM_CD) {
-		seq_printf(m, "%cCD", sep);
-		sep = '|';
-	}
-	if (self->settings.dce & IRCOMM_RI) {
-		seq_printf(m, "%cRI", sep);
-		sep = '|';
-	}
-	seq_putc(m, '\n');
-
-	seq_puts(m, "Configuration: ");
-	if (!self->settings.null_modem)
-		seq_puts(m, "DTE <-> DCE\n");
-	else
-		seq_puts(m, "DTE <-> DTE (null modem emulation)\n");
-
-	seq_printf(m, "Data rate: %d\n", self->settings.data_rate);
-
-	seq_puts(m, "Flow control:");
-	sep = ' ';
-	if (self->settings.flow_control & IRCOMM_XON_XOFF_IN) {
-		seq_printf(m, "%cXON_XOFF_IN", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_XON_XOFF_OUT) {
-		seq_printf(m, "%cXON_XOFF_OUT", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_RTS_CTS_IN) {
-		seq_printf(m, "%cRTS_CTS_IN", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_RTS_CTS_OUT) {
-		seq_printf(m, "%cRTS_CTS_OUT", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_DSR_DTR_IN) {
-		seq_printf(m, "%cDSR_DTR_IN", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_DSR_DTR_OUT) {
-		seq_printf(m, "%cDSR_DTR_OUT", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_ENQ_ACK_IN) {
-		seq_printf(m, "%cENQ_ACK_IN", sep);
-		sep = '|';
-	}
-	if (self->settings.flow_control & IRCOMM_ENQ_ACK_OUT) {
-		seq_printf(m, "%cENQ_ACK_OUT", sep);
-		sep = '|';
-	}
-	seq_putc(m, '\n');
-
-	seq_puts(m, "Flags:");
-	sep = ' ';
-	if (tty_port_cts_enabled(&self->port)) {
-		seq_printf(m, "%cASYNC_CTS_FLOW", sep);
-		sep = '|';
-	}
-	if (tty_port_check_carrier(&self->port)) {
-		seq_printf(m, "%cASYNC_CHECK_CD", sep);
-		sep = '|';
-	}
-	if (tty_port_initialized(&self->port)) {
-		seq_printf(m, "%cASYNC_INITIALIZED", sep);
-		sep = '|';
-	}
-	if (self->port.flags & ASYNC_LOW_LATENCY) {
-		seq_printf(m, "%cASYNC_LOW_LATENCY", sep);
-		sep = '|';
-	}
-	if (tty_port_active(&self->port)) {
-		seq_printf(m, "%cASYNC_NORMAL_ACTIVE", sep);
-		sep = '|';
-	}
-	seq_putc(m, '\n');
-
-	seq_printf(m, "Role: %s\n", self->client ? "client" : "server");
-	seq_printf(m, "Open count: %d\n", self->port.count);
-	seq_printf(m, "Max data size: %d\n", self->max_data_size);
-	seq_printf(m, "Max header size: %d\n", self->max_header_size);
-
-	tty = tty_port_tty_get(&self->port);
-	if (tty) {
-		seq_printf(m, "Hardware: %s\n",
-			       tty->hw_stopped ? "Stopped" : "Running");
-		tty_kref_put(tty);
-	}
-}
-
-static int ircomm_tty_proc_show(struct seq_file *m, void *v)
-{
-	struct ircomm_tty_cb *self;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ircomm_tty->hb_spinlock, flags);
-
-	self = (struct ircomm_tty_cb *) hashbin_get_first(ircomm_tty);
-	while (self != NULL) {
-		if (self->magic != IRCOMM_TTY_MAGIC)
-			break;
-
-		ircomm_tty_line_info(self, m);
-		self = (struct ircomm_tty_cb *) hashbin_get_next(ircomm_tty);
-	}
-	spin_unlock_irqrestore(&ircomm_tty->hb_spinlock, flags);
-	return 0;
-}
-
-static int ircomm_tty_proc_open(struct inode *inode, struct file *file)
-{
-	return single_open(file, ircomm_tty_proc_show, NULL);
-}
-
-static const struct file_operations ircomm_tty_proc_fops = {
-	.owner		= THIS_MODULE,
-	.open		= ircomm_tty_proc_open,
-	.read		= seq_read,
-	.llseek		= seq_lseek,
-	.release	= single_release,
-};
-#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);