static int startup(SLMP_INFO *info);
static int block_til_ready(struct tty_struct *tty, struct file * filp,SLMP_INFO *info);
+static int carrier_raised(struct tty_port *port);
static void shutdown(SLMP_INFO *info);
static void program_hw(SLMP_INFO *info);
static void change_params(SLMP_INFO *info);
printk("%s(%d):%s close() entry, count=%d\n",
__FILE__,__LINE__, info->device_name, info->port.count);
- if (!info->port.count)
- return;
-
- if (tty_hung_up_p(filp))
- goto cleanup;
-
- if ((tty->count == 1) && (info->port.count != 1)) {
- /*
- * tty->count is 1 and the tty structure will be freed.
- * info->port.count should be one in this case.
- * if it's not, correct it so that the port is shutdown.
- */
- printk("%s(%d):%s close: bad refcount; tty->count is 1, "
- "info->port.count is %d\n",
- __FILE__,__LINE__, info->device_name, info->port.count);
- info->port.count = 1;
- }
-
- info->port.count--;
-
- /* if at least one open remaining, leave hardware active */
- if (info->port.count)
+ if (tty_port_close_start(&info->port, tty, filp) == 0)
goto cleanup;
-
- info->port.flags |= ASYNC_CLOSING;
-
- /* set tty->closing to notify line discipline to
- * only process XON/XOFF characters. Only the N_TTY
- * discipline appears to use this (ppp does not).
- */
- tty->closing = 1;
-
- /* wait for transmit data to clear all layers */
-
- if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) {
- if (debug_level >= DEBUG_LEVEL_INFO)
- printk("%s(%d):%s close() calling tty_wait_until_sent\n",
- __FILE__,__LINE__, info->device_name );
- tty_wait_until_sent(tty, info->port.closing_wait);
- }
-
+
if (info->port.flags & ASYNC_INITIALIZED)
wait_until_sent(tty, info->timeout);
flush_buffer(tty);
-
tty_ldisc_flush(tty);
-
shutdown(info);
- tty->closing = 0;
+ tty_port_close_end(&info->port, tty);
info->port.tty = NULL;
-
- if (info->port.blocked_open) {
- if (info->port.close_delay) {
- msleep_interruptible(jiffies_to_msecs(info->port.close_delay));
- }
- wake_up_interruptible(&info->port.open_wait);
- }
-
- info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-
- wake_up_interruptible(&info->port.close_wait);
-
cleanup:
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s close() exit, count=%d\n", __FILE__,__LINE__,
return 0;
}
+static int carrier_raised(struct tty_port *port)
+{
+ SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ get_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+ return (info->serial_signals & SerialSignal_DCD) ? 1 : 0;
+}
+
+static void raise_dtr_rts(struct tty_port *port)
+{
+ SLMP_INFO *info = container_of(port, SLMP_INFO, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->lock,flags);
+ info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
+ set_signals(info);
+ spin_unlock_irqrestore(&info->lock,flags);
+}
/* Block the current process until the specified port is ready to open.
*/
bool do_clocal = false;
bool extra_count = false;
unsigned long flags;
+ int cd;
+ struct tty_port *port = &info->port;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s block_til_ready()\n",
if (filp->f_flags & O_NONBLOCK || tty->flags & (1 << TTY_IO_ERROR)){
/* nonblock mode is set or port is not enabled */
/* just verify that callout device is not active */
- info->port.flags |= ASYNC_NORMAL_ACTIVE;
+ port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
/* Wait for carrier detect and the line to become
* free (i.e., not in use by the callout). While we are in
- * this loop, info->port.count is dropped by one, so that
+ * this loop, port->count is dropped by one, so that
* close() knows when to free things. We restore it upon
* exit, either normal or abnormal.
*/
retval = 0;
- add_wait_queue(&info->port.open_wait, &wait);
+ add_wait_queue(&port->open_wait, &wait);
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s block_til_ready() before block, count=%d\n",
- __FILE__,__LINE__, tty->driver->name, info->port.count );
+ __FILE__,__LINE__, tty->driver->name, port->count );
spin_lock_irqsave(&info->lock, flags);
if (!tty_hung_up_p(filp)) {
extra_count = true;
- info->port.count--;
+ port->count--;
}
spin_unlock_irqrestore(&info->lock, flags);
- info->port.blocked_open++;
+ port->blocked_open++;
while (1) {
- if ((tty->termios->c_cflag & CBAUD)) {
- spin_lock_irqsave(&info->lock,flags);
- info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
- set_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
- }
+ if (tty->termios->c_cflag & CBAUD)
+ tty_port_raise_dtr_rts(port);
set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) || !(info->port.flags & ASYNC_INITIALIZED)){
- retval = (info->port.flags & ASYNC_HUP_NOTIFY) ?
+ if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)){
+ retval = (port->flags & ASYNC_HUP_NOTIFY) ?
-EAGAIN : -ERESTARTSYS;
break;
}
- spin_lock_irqsave(&info->lock,flags);
- get_signals(info);
- spin_unlock_irqrestore(&info->lock,flags);
+ cd = tty_port_carrier_raised(port);
- if (!(info->port.flags & ASYNC_CLOSING) &&
- (do_clocal || (info->serial_signals & SerialSignal_DCD)) ) {
+ if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
break;
- }
if (signal_pending(current)) {
retval = -ERESTARTSYS;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s block_til_ready() count=%d\n",
- __FILE__,__LINE__, tty->driver->name, info->port.count );
+ __FILE__,__LINE__, tty->driver->name, port->count );
schedule();
}
set_current_state(TASK_RUNNING);
- remove_wait_queue(&info->port.open_wait, &wait);
+ remove_wait_queue(&port->open_wait, &wait);
if (extra_count)
- info->port.count++;
- info->port.blocked_open--;
+ port->count++;
+ port->blocked_open--;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):%s block_til_ready() after, count=%d\n",
- __FILE__,__LINE__, tty->driver->name, info->port.count );
+ __FILE__,__LINE__, tty->driver->name, port->count );
if (!retval)
- info->port.flags |= ASYNC_NORMAL_ACTIVE;
+ port->flags |= ASYNC_NORMAL_ACTIVE;
return retval;
}
#endif
}
+static const struct tty_port_operations port_ops = {
+ .carrier_raised = carrier_raised,
+ .raise_dtr_rts = raise_dtr_rts,
+};
+
/* Allocate and initialize a device instance structure
*
* Return Value: pointer to SLMP_INFO if success, otherwise NULL
__FILE__,__LINE__, adapter_num, port_num);
} else {
tty_port_init(&info->port);
+ info->port.ops = &port_ops;
info->magic = MGSL_MAGIC;
INIT_WORK(&info->task, bh_handler);
info->max_frame_size = 4096;
.tiocmset = tiocmset,
};
+
static void synclinkmp_cleanup(void)
{
int rc;
projects / cascardo / linux.git / blobdiff