void uart_write_wakeup(struct uart_port *port)
{
struct uart_info *info = port->info;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ BUG_ON(!info);
tasklet_schedule(&info->tlet);
}
struct termios *old, unsigned int min, unsigned int max)
{
unsigned int try, baud, altbaud = 38400;
- unsigned int flags = port->flags & UPF_SPD_MASK;
+ upf_t flags = port->flags & UPF_SPD_MASK;
if (flags == UPF_SPD_HI)
altbaud = 57600;
}
static int
-uart_write(struct tty_struct *tty, const unsigned char * buf, int count)
+uart_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
struct uart_state *state = tty->driver_data;
- struct uart_port *port = state->port;
- struct circ_buf *circ = &state->info->xmit;
+ struct uart_port *port;
+ struct circ_buf *circ;
unsigned long flags;
int c, ret = 0;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ if (!state || !state->info) {
+ WARN_ON(1);
+ return -EL3HLT;
+ }
+
+ port = state->port;
+ circ = &state->info->xmit;
+
if (!circ->buf)
return 0;
struct uart_port *port = state->port;
unsigned long flags;
+ /*
+ * This means you called this function _after_ the port was
+ * closed. No cookie for you.
+ */
+ if (!state || !state->info) {
+ WARN_ON(1);
+ return;
+ }
+
DPRINTK("uart_flush_buffer(%d) called\n", tty->index);
spin_lock_irqsave(&port->lock, flags);
struct serial_struct new_serial;
struct uart_port *port = state->port;
unsigned long new_port;
- unsigned int change_irq, change_port, old_flags, closing_wait;
+ unsigned int change_irq, change_port, closing_wait;
unsigned int old_custom_divisor, close_delay;
+ upf_t old_flags, new_flags;
int retval = 0;
if (copy_from_user(&new_serial, newinfo, sizeof(new_serial)))
* module insertion/removal doesn't change anything
* under us.
*/
- down(&state->sem);
+ mutex_lock(&state->mutex);
change_irq = new_serial.irq != port->irq;
new_serial.type != port->type;
old_flags = port->flags;
+ new_flags = new_serial.flags;
old_custom_divisor = port->custom_divisor;
if (!capable(CAP_SYS_ADMIN)) {
(close_delay != state->close_delay) ||
(closing_wait != state->closing_wait) ||
(new_serial.xmit_fifo_size != port->fifosize) ||
- (((new_serial.flags ^ old_flags) & ~UPF_USR_MASK) != 0))
+ (((new_flags ^ old_flags) & ~UPF_USR_MASK) != 0))
goto exit;
port->flags = ((port->flags & ~UPF_USR_MASK) |
- (new_serial.flags & UPF_USR_MASK));
+ (new_flags & UPF_USR_MASK));
port->custom_divisor = new_serial.custom_divisor;
goto check_and_exit;
}
port->irq = new_serial.irq;
port->uartclk = new_serial.baud_base * 16;
port->flags = (port->flags & ~UPF_CHANGE_MASK) |
- (new_serial.flags & UPF_CHANGE_MASK);
+ (new_flags & UPF_CHANGE_MASK);
port->custom_divisor = new_serial.custom_divisor;
state->close_delay = close_delay;
state->closing_wait = closing_wait;
} else
retval = uart_startup(state, 1);
exit:
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return retval;
}
struct uart_port *port = state->port;
int result = -EIO;
- down(&state->sem);
+ mutex_lock(&state->mutex);
if ((!file || !tty_hung_up_p(file)) &&
!(tty->flags & (1 << TTY_IO_ERROR))) {
result = port->mctrl;
result |= port->ops->get_mctrl(port);
spin_unlock_irq(&port->lock);
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return result;
}
struct uart_port *port = state->port;
int ret = -EIO;
- down(&state->sem);
+ mutex_lock(&state->mutex);
if ((!file || !tty_hung_up_p(file)) &&
!(tty->flags & (1 << TTY_IO_ERROR))) {
uart_update_mctrl(port, set, clear);
ret = 0;
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return ret;
}
BUG_ON(!kernel_locked());
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (port->type != PORT_UNKNOWN)
port->ops->break_ctl(port, break_state);
- up(&state->sem);
+ mutex_unlock(&state->mutex);
}
static int uart_do_autoconfig(struct uart_state *state)
* changing, and hence any extra opens of the port while
* we're auto-configuring.
*/
- if (down_interruptible(&state->sem))
+ if (mutex_lock_interruptible(&state->mutex))
return -ERESTARTSYS;
ret = -EBUSY;
ret = uart_startup(state, 1);
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return ret;
}
if (ret != -ENOIOCTLCMD)
goto out;
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (tty_hung_up_p(filp)) {
ret = -EIO;
}
}
out_up:
- up(&state->sem);
+ mutex_unlock(&state->mutex);
out:
return ret;
}
DPRINTK("uart_close(%d) called\n", port->line);
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (tty_hung_up_p(filp))
goto done;
wake_up_interruptible(&state->info->open_wait);
done:
- up(&state->sem);
+ mutex_unlock(&state->mutex);
}
static void uart_wait_until_sent(struct tty_struct *tty, int timeout)
BUG_ON(!kernel_locked());
DPRINTK("uart_hangup(%d)\n", state->port->line);
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (state->info && state->info->flags & UIF_NORMAL_ACTIVE) {
uart_flush_buffer(tty);
uart_shutdown(state);
wake_up_interruptible(&state->info->open_wait);
wake_up_interruptible(&state->info->delta_msr_wait);
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
}
/*
if (mctrl & TIOCM_CAR)
break;
- up(&state->sem);
+ mutex_unlock(&state->mutex);
schedule();
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (signal_pending(current))
break;
mutex_lock(&port_mutex);
state = drv->state + line;
- if (down_interruptible(&state->sem)) {
+ if (mutex_lock_interruptible(&state->mutex)) {
state = ERR_PTR(-ERESTARTSYS);
goto out;
}
state->count++;
if (!state->port) {
state->count--;
- up(&state->sem);
+ mutex_unlock(&state->mutex);
state = ERR_PTR(-ENXIO);
goto out;
}
(unsigned long)state);
} else {
state->count--;
- up(&state->sem);
+ mutex_unlock(&state->mutex);
state = ERR_PTR(-ENOMEM);
}
}
if (tty_hung_up_p(filp)) {
retval = -EAGAIN;
state->count--;
- up(&state->sem);
+ mutex_unlock(&state->mutex);
goto fail;
}
*/
if (retval == 0)
retval = uart_block_til_ready(filp, state);
- up(&state->sem);
+ mutex_unlock(&state->mutex);
/*
* If this is the first open to succeed, adjust things to suit.
#endif
#ifdef CONFIG_SERIAL_CORE_CONSOLE
+/*
+ * uart_console_write - write a console message to a serial port
+ * @port: the port to write the message
+ * @s: array of characters
+ * @count: number of characters in string to write
+ * @write: function to write character to port
+ */
+void uart_console_write(struct uart_port *port, const char *s,
+ unsigned int count,
+ void (*putchar)(struct uart_port *, int))
+{
+ unsigned int i;
+
+ for (i = 0; i < count; i++, s++) {
+ if (*s == '\n')
+ putchar(port, '\r');
+ putchar(port, *s);
+ }
+}
+EXPORT_SYMBOL_GPL(uart_console_write);
+
/*
* Check whether an invalid uart number has been specified, and
* if so, search for the first available port that does have
{
struct uart_state *state = drv->state + port->line;
- down(&state->sem);
+ mutex_lock(&state->mutex);
if (state->info && state->info->flags & UIF_INITIALIZED) {
- struct uart_ops *ops = port->ops;
+ const struct uart_ops *ops = port->ops;
spin_lock_irq(&port->lock);
ops->stop_tx(port);
uart_change_pm(state, 3);
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return 0;
}
{
struct uart_state *state = drv->state + port->line;
- down(&state->sem);
+ mutex_lock(&state->mutex);
uart_change_pm(state, 0);
}
if (state->info && state->info->flags & UIF_INITIALIZED) {
- struct uart_ops *ops = port->ops;
+ const struct uart_ops *ops = port->ops;
int ret;
ops->set_mctrl(port, 0);
}
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
return 0;
}
if (info && info->tty)
tty_vhangup(info->tty);
- down(&state->sem);
+ mutex_lock(&state->mutex);
state->info = NULL;
kfree(info);
}
- up(&state->sem);
+ mutex_unlock(&state->mutex);
}
static struct tty_operations uart_ops = {
state->close_delay = 500; /* .5 seconds */
state->closing_wait = 30000; /* 30 seconds */
- init_MUTEX(&state->sem);
+ mutex_init(&state->mutex);
}
retval = tty_register_driver(normal);
* If this port is a console, then the spinlock is already
* initialised.
*/
- if (!uart_console(port))
+ if (!(uart_console(port) && (port->cons->flags & CON_ENABLED)))
spin_lock_init(&port->lock);
uart_configure_port(drv, state, port);
projects / mv-sheeva.git / blobdiff