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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /net/irda/ircomm/ircomm_tty.c
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
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!
Diffstat (limited to 'net/irda/ircomm/ircomm_tty.c')
-rw-r--r--net/irda/ircomm/ircomm_tty.c1405
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 00000000000..5d1e61168eb
--- /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);