if (tty_port_initialized(port))
return 0;
- /*
- * Set the TTY IO error marker - we will only clear this
- * once we have successfully opened the port.
- */
- set_bit(TTY_IO_ERROR, &tty->flags);
-
retval = uart_port_startup(tty, state, init_hw);
- if (!retval) {
- tty_port_set_initialized(port, 1);
- clear_bit(TTY_IO_ERROR, &tty->flags);
- } else if (retval > 0)
- retval = 0;
+ if (retval)
+ set_bit(TTY_IO_ERROR, &tty->flags);
return retval;
}
}
uart_change_speed(tty, state, NULL);
}
- } else
+ } else {
retval = uart_startup(tty, state, 1);
+ if (retval > 0)
+ retval = 0;
+ }
exit:
return retval;
}
uport->ops->config_port(uport, flags);
ret = uart_startup(tty, state, 1);
+ if (ret > 0)
+ ret = 0;
}
out:
mutex_unlock(&port->mutex);
{
struct uart_state *state = tty->driver_data;
struct tty_port *port;
- struct uart_port *uport;
if (!state) {
struct uart_driver *drv = tty->driver->driver_state;
port = &state->port;
pr_debug("uart_close(%d) called\n", tty->index);
- if (tty_port_close_start(port, tty, filp) == 0)
- return;
+ tty_port_close(tty->port, tty, filp);
+}
- mutex_lock(&port->mutex);
- uport = uart_port_check(state);
+static void uart_tty_port_shutdown(struct tty_port *port)
+{
+ struct uart_state *state = container_of(port, struct uart_state, port);
+ struct uart_port *uport = uart_port_check(state);
/*
* At this point, we stop accepting input. To do this, we
* disable the receive line status interrupts.
*/
- if (tty_port_initialized(port) &&
- !WARN(!uport, "detached port still initialized!\n")) {
- spin_lock_irq(&uport->lock);
- uport->ops->stop_rx(uport);
- spin_unlock_irq(&uport->lock);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- uart_wait_until_sent(tty, uport->timeout);
- }
-
- uart_shutdown(tty, state);
- tty_port_tty_set(port, NULL);
+ if (WARN(!uport, "detached port still initialized!\n"))
+ return;
- spin_lock_irq(&port->lock);
+ spin_lock_irq(&uport->lock);
+ uport->ops->stop_rx(uport);
+ spin_unlock_irq(&uport->lock);
- if (port->blocked_open) {
- spin_unlock_irq(&port->lock);
- if (port->close_delay)
- msleep_interruptible(jiffies_to_msecs(port->close_delay));
- spin_lock_irq(&port->lock);
- } else if (uport && !uart_console(uport)) {
- spin_unlock_irq(&port->lock);
- uart_change_pm(state, UART_PM_STATE_OFF);
- spin_lock_irq(&port->lock);
- }
- spin_unlock_irq(&port->lock);
- tty_port_set_active(port, 0);
+ uart_port_shutdown(port);
/*
- * Wake up anyone trying to open this port.
+ * It's possible for shutdown to be called after suspend if we get
+ * a DCD drop (hangup) at just the right time. Clear suspended bit so
+ * we don't try to resume a port that has been shutdown.
*/
- wake_up_interruptible(&port->open_wait);
+ tty_port_set_suspended(port, 0);
- mutex_unlock(&port->mutex);
+ uart_change_pm(state, UART_PM_STATE_OFF);
- tty_ldisc_flush(tty);
- tty->closing = 0;
}
static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
struct uart_driver *drv = tty->driver->driver_state;
int retval, line = tty->index;
struct uart_state *state = drv->state + line;
- struct tty_port *port = &state->port;
- struct uart_port *uport;
- pr_debug("uart_open(%d) called\n", line);
+ tty->driver_data = state;
- spin_lock_irq(&port->lock);
- ++port->count;
- spin_unlock_irq(&port->lock);
+ retval = tty_port_open(&state->port, tty, filp);
+ if (retval > 0)
+ retval = 0;
- /*
- * We take the semaphore here to guarantee that we won't be re-entered
- * while allocating the state structure, or while we request any IRQs
- * that the driver may need. This also has the nice side-effect that
- * it delays the action of uart_hangup, so we can guarantee that
- * state->port.tty will always contain something reasonable.
- */
- if (mutex_lock_interruptible(&port->mutex)) {
- retval = -ERESTARTSYS;
- goto end;
- }
+ return retval;
+}
+
+static int uart_port_activate(struct tty_port *port, struct tty_struct *tty)
+{
+ struct uart_state *state = container_of(port, struct uart_state, port);
+ struct uart_port *uport;
uport = uart_port_check(state);
- if (!uport || uport->flags & UPF_DEAD) {
- retval = -ENXIO;
- goto err_unlock;
- }
+ if (!uport || uport->flags & UPF_DEAD)
+ return -ENXIO;
- tty->driver_data = state;
- uport->state = state;
port->low_latency = (uport->flags & UPF_LOW_LATENCY) ? 1 : 0;
- tty_port_tty_set(port, tty);
/*
* Start up the serial port.
*/
- retval = uart_startup(tty, state, 0);
-
- /*
- * If we succeeded, wait until the port is ready.
- */
-err_unlock:
- mutex_unlock(&port->mutex);
- if (retval == 0)
- retval = tty_port_block_til_ready(port, tty, filp);
-end:
- return retval;
+ return uart_startup(tty, state, 0);
}
static const char *uart_type(struct uart_port *port)
*
* Returns 0 on success or -EINVAL on failure
*/
-int uart_parse_earlycon(char *p, unsigned char *iotype, unsigned long *addr,
+int uart_parse_earlycon(char *p, unsigned char *iotype, resource_size_t *addr,
char **options)
{
if (strncmp(p, "mmio,", 5) == 0) {
return -EINVAL;
}
- *addr = simple_strtoul(p, NULL, 0);
+ /*
+ * Before you replace it with kstrtoull(), think about options separator
+ * (',') it will not tolerate
+ */
+ *addr = simple_strtoull(p, NULL, 0);
p = strchr(p, ',');
if (p)
p++;
static const struct tty_port_operations uart_port_ops = {
.carrier_raised = uart_carrier_raised,
.dtr_rts = uart_dtr_rts,
+ .activate = uart_port_activate,
+ .shutdown = uart_tty_port_shutdown,
};
/**
uport->cons = drv->cons;
uport->minor = drv->tty_driver->minor_start + uport->line;
+ port->console = uart_console(uport);
+
/*
* If this port is a console, then the spinlock is already
* initialised.
projects / cascardo / linux.git / blobdiff