static int uart_open(struct tty_struct *tty, struct file *filp)
{
struct uart_driver *drv = (struct uart_driver *)tty->driver->driver_state;
int retval, line = tty->index;
struct uart_state *state = drv->state + line;
struct tty_port *port = &state->port;
pr_debug("uart_open(%d) called\n", line);
if (mutex_lock_interruptible(&port->mutex)) {
retval = -ERESTARTSYS;
goto end;
}
port->count++;
if (!state->uart_port || state->uart_port->flags & UPF_DEAD) {
retval = -ENXIO;
goto err_dec_count;
}
tty->driver_data = state;
state->uart_port->state = state;
tty->low_latency = (state->uart_port->flags & UPF_LOW_LATENCY) ? 1 : 0;
tty_port_tty_set(port, tty);
if (tty_hung_up_p(filp)) {
retval = -EAGAIN;
goto err_dec_count;
}
if (port->count == 1)
uart_change_pm(state, 0);
retval = uart_startup(tty, state, 0);
mutex_unlock(&port->mutex);
if (retval == 0)
retval = tty_port_block_til_ready(port, tty, filp);
end:
return retval;
err_dec_count:
port->count--;
mutex_unlock(&port->mutex);
goto end;
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/
static int rs_open(struct tty_struct *tty, struct file * filp)
{
struct serial_state *info = rs_table + tty->index;
struct tty_port *port = &info->tport;
int retval;
port->count++;
port->tty = tty;
tty->driver_data = info;
tty->port = port;
if (serial_paranoia_check(info, tty->name, "rs_open"))
return -ENODEV;
tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
retval = startup(tty, info);
if (retval) {
return retval;
}
return tty_port_block_til_ready(port, tty, filp);
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its S structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/
int rs_open(struct tty_struct *tty, struct file * filp)
{
struct m68k_serial *info;
int retval;
info = &m68k_soft[tty->index];
if (serial_paranoia_check(info, tty->name, "rs_open"))
return -ENODEV;
info->tport.count++;
tty->driver_data = info;
tty_port_tty_set(&info->tport, tty);
/*
* Start up serial port
*/
retval = startup(info, tty);
if (retval)
return retval;
return tty_port_block_til_ready(&info->tport, tty, filp);
}
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
{
struct acm *acm;
int rv = -ENODEV;
int i;
dbg("Entering acm_tty_open.");
mutex_lock(&open_mutex);
acm = acm_table[tty->index];
if (!acm || !acm->dev)
goto out;
else
rv = 0;
set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
tty->driver_data = acm;
tty_port_tty_set(&acm->port, tty);
if (usb_autopm_get_interface(acm->control) < 0)
goto early_bail;
else
acm->control->needs_remote_wakeup = 1;
mutex_lock(&acm->mutex);
if (acm->port.count++) {
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
goto out;
}
acm->ctrlurb->dev = acm->dev;
if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
dbg("usb_submit_urb(ctrl irq) failed");
goto bail_out;
}
if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
(acm->ctrl_caps & USB_CDC_CAP_LINE))
goto full_bailout;
/* enorcar*/
acm->state &= ~ACM_ABS_IDLE;
if (0 > acm_set_comm_feature(acm, ACM_ABSTRACT_STATE, &acm->state) &&
(acm->ctrl_caps & USB_CDC_COMM_FEATURE))
goto full_bailout;
usb_autopm_put_interface(acm->control);
INIT_LIST_HEAD(&acm->spare_read_urbs);
INIT_LIST_HEAD(&acm->spare_read_bufs);
INIT_LIST_HEAD(&acm->filled_read_bufs);
for (i = 0; i < acm->rx_buflimit; i++)
list_add(&(acm->ru[i].list), &acm->spare_read_urbs);
for (i = 0; i < acm->rx_buflimit; i++)
list_add(&(acm->rb[i].list), &acm->spare_read_bufs);
acm->throttle = 0;
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
tasklet_schedule(&acm->urb_task);
mutex_unlock(&acm->mutex);
out:
mutex_unlock(&open_mutex);
return rv;
full_bailout:
usb_kill_urb(acm->ctrlurb);
bail_out:
acm->port.count--;
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
early_bail:
mutex_unlock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
return -EIO;
}
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
{
struct acm *acm;
int rv = -ENODEV;
mutex_lock(&open_mutex);
acm = acm_table[tty->index];
if (!acm || !acm->dev)
goto out;
else
rv = 0;
dev_dbg(&acm->control->dev, "%s\n", __func__);
set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
tty->driver_data = acm;
tty_port_tty_set(&acm->port, tty);
if (usb_autopm_get_interface(acm->control) < 0)
goto early_bail;
else
acm->control->needs_remote_wakeup = 1;
mutex_lock(&acm->mutex);
if (acm->port.count++) {
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
goto out;
}
acm->ctrlurb->dev = acm->dev;
if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
dev_err(&acm->control->dev,
"%s - usb_submit_urb(ctrl irq) failed\n", __func__);
goto bail_out;
}
if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
(acm->ctrl_caps & USB_CDC_CAP_LINE))
goto bail_out;
usb_autopm_put_interface(acm->control);
/*
* Unthrottle device in case the TTY was closed while throttled.
*/
spin_lock_irq(&acm->read_lock);
acm->throttled = 0;
acm->throttle_req = 0;
spin_unlock_irq(&acm->read_lock);
if (acm_submit_read_urbs(acm, GFP_KERNEL))
goto bail_out;
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
mutex_unlock(&acm->mutex);
out:
mutex_unlock(&open_mutex);
return rv;
bail_out:
acm->port.count--;
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
early_bail:
mutex_unlock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
return -EIO;
}
static int acm_tty_open(struct tty_struct *tty, struct file *filp)
{
struct acm *acm;
int rv = -ENODEV;
mutex_lock(&open_mutex);
acm = acm_table[tty->index];
if (!acm || !acm->dev)
goto out;
else
rv = 0;
dev_dbg(&acm->control->dev, "%s\n", __func__);
set_bit(TTY_NO_WRITE_SPLIT, &tty->flags);
tty->driver_data = acm;
tty_port_tty_set(&acm->port, tty);
if (usb_autopm_get_interface(acm->control) < 0)
goto early_bail;
else
acm->control->needs_remote_wakeup = 0;
mutex_lock(&acm->mutex);
if (acm->port.count++) {
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
goto out;
}
if (acm_submit_read_urbs(acm, GFP_KERNEL))
goto bail_out;
acm->ctrlurb->dev = acm->dev;
if (usb_submit_urb(acm->ctrlurb, GFP_KERNEL)) {
dev_err(&acm->control->dev,
"%s - usb_submit_urb(ctrl irq) failed\n", __func__);
goto bail_out;
}
if (0 > acm_set_control(acm, acm->ctrlout = ACM_CTRL_DTR | ACM_CTRL_RTS) &&
(acm->ctrl_caps & USB_CDC_CAP_LINE))
goto bail_out;
// enorcar
acm->state &= ~ACM_ABS_IDLE;
if (0 > acm_set_comm_feature(acm, ACM_ABSTRACT_STATE, &acm->state) &&
(acm->ctrl_caps & USB_CDC_COMM_FEATURE))
goto bail_out;
usb_autopm_put_interface(acm->control);
set_bit(ASYNCB_INITIALIZED, &acm->port.flags);
rv = tty_port_block_til_ready(&acm->port, tty, filp);
mutex_unlock(&acm->mutex);
out:
mutex_unlock(&open_mutex);
return rv;
bail_out:
acm->port.count--;
mutex_unlock(&acm->mutex);
usb_autopm_put_interface(acm->control);
early_bail:
mutex_unlock(&open_mutex);
tty_port_tty_set(&acm->port, NULL);
return -EIO;
}
