if (tty->termios.c_cflag & CBAUD)
uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
}
- /*
- * if hw support flow control without software intervention,
- * then skip the below check
- */
- if (tty_port_cts_enabled(port) &&
- !(uport->flags & UPF_HARD_FLOW)) {
+
+ if (tty_port_cts_enabled(port)) {
spin_lock_irq(&uport->lock);
if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS))
tty->hw_stopped = 1;
/*
* Turn off DTR and RTS early.
*/
+ if (uart_console(uport) && tty)
+ uport->cons->cflag = tty->termios.c_cflag;
+
if (!tty || (tty->termios.c_cflag & HUPCL))
uart_clear_mctrl(uport, TIOCM_DTR | TIOCM_RTS);
return;
termios = &tty->termios;
+ uport->ops->set_termios(uport, termios, old_termios);
/*
* Set flags based on termios cflag
clear_bit(ASYNCB_CHECK_CD, &port->flags);
else
set_bit(ASYNCB_CHECK_CD, &port->flags);
-
- uport->ops->set_termios(uport, termios, old_termios);
}
static inline int __uart_put_char(struct uart_port *port,
if (port->ops->send_xchar)
port->ops->send_xchar(port, ch);
else {
+ spin_lock_irqsave(&port->lock, flags);
port->x_char = ch;
- if (ch) {
- spin_lock_irqsave(&port->lock, flags);
+ if (ch)
port->ops->start_tx(port);
- spin_unlock_irqrestore(&port->lock, flags);
- }
+ spin_unlock_irqrestore(&port->lock, flags);
}
}
mask &= ~port->flags;
}
- if (mask & UPF_SOFT_FLOW) {
- if (port->x_char)
- port->x_char = 0;
- else
- uart_send_xchar(tty, START_CHAR(tty));
- }
+ if (mask & UPF_SOFT_FLOW)
+ uart_send_xchar(tty, START_CHAR(tty));
if (mask & UPF_HARD_FLOW)
uart_set_mctrl(port, TIOCM_RTS);
*/
if (uport->flags & UPF_SPD_MASK) {
char buf[64];
- printk(KERN_NOTICE
- "%s sets custom speed on %s. This "
- "is deprecated.\n", current->comm,
- tty_name(port->tty, buf));
+
+ dev_notice(uport->dev,
+ "%s sets custom speed on %s. This is deprecated.\n",
+ current->comm,
+ tty_name(port->tty, buf));
}
uart_change_speed(tty, state, NULL);
}
return ret;
}
+static void uart_enable_ms(struct uart_port *uport)
+{
+ /*
+ * Force modem status interrupts on
+ */
+ if (uport->ops->enable_ms)
+ uport->ops->enable_ms(uport);
+}
+
/*
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
* - mask passed in arg for lines of interest
*/
spin_lock_irq(&uport->lock);
memcpy(&cprev, &uport->icount, sizeof(struct uart_icount));
-
- /*
- * Force modem status interrupts on
- */
- uport->ops->enable_ms(uport);
+ uart_enable_ms(uport);
spin_unlock_irq(&uport->lock);
add_wait_queue(&port->delta_msr_wait, &wait);
}
uart_change_speed(tty, state, old_termios);
+ /* reload cflag from termios; port driver may have overriden flags */
+ cflag = tty->termios.c_cflag;
/* Handle transition to B0 status */
if ((old_termios->c_cflag & CBAUD) && !(cflag & CBAUD))
/* Handle transition away from B0 status */
else if (!(old_termios->c_cflag & CBAUD) && (cflag & CBAUD)) {
unsigned int mask = TIOCM_DTR;
- if (!(cflag & CRTSCTS) ||
- !test_bit(TTY_THROTTLED, &tty->flags))
+ if (!(cflag & CRTSCTS) || !test_bit(TTY_THROTTLED, &tty->flags))
mask |= TIOCM_RTS;
uart_set_mctrl(uport, mask);
}
tty_ldisc_flush(tty);
tty_port_tty_set(port, NULL);
- spin_lock_irqsave(&port->lock, flags);
tty->closing = 0;
+ spin_lock_irqsave(&port->lock, flags);
if (port->blocked_open) {
spin_unlock_irqrestore(&port->lock, flags);
struct uart_port *uport = state->uart_port;
int mctrl;
spin_lock_irq(&uport->lock);
- uport->ops->enable_ms(uport);
+ uart_enable_ms(uport);
mctrl = uport->ops->get_mctrl(uport);
spin_unlock_irq(&uport->lock);
if (mctrl & TIOCM_CAR)
(state->uart_port->flags & UPF_LOW_LATENCY) ? 1 : 0;
tty_port_tty_set(port, tty);
- /*
- * If the port is in the middle of closing, bail out now.
- */
- if (tty_hung_up_p(filp)) {
- retval = -EAGAIN;
- goto err_dec_count;
- }
-
/*
* Start up the serial port.
*/
for (tries = 3; !ops->tx_empty(uport) && tries; tries--)
msleep(10);
if (!tries)
- printk(KERN_ERR "%s%s%s%d: Unable to drain "
- "transmitter\n",
- uport->dev ? dev_name(uport->dev) : "",
- uport->dev ? ": " : "",
- drv->dev_name,
- drv->tty_driver->name_base + uport->line);
+ dev_err(uport->dev, "%s%d: Unable to drain transmitter\n",
+ drv->dev_name,
+ drv->tty_driver->name_base + uport->line);
if (console_suspend_enabled || !uart_console(uport))
ops->shutdown(uport);
break;
}
- printk(KERN_INFO "%s%s%s%d at %s (irq = %d, base_baud = %d) is a %s\n",
- port->dev ? dev_name(port->dev) : "",
- port->dev ? ": " : "",
+ dev_info(port->dev, "%s%d at %s (irq = %d, base_baud = %d) is a %s\n",
drv->dev_name,
drv->tty_driver->name_base + port->line,
address, port->irq, port->uartclk / 16, uart_type(port));
.attrs = tty_dev_attrs,
};
-static const struct attribute_group *tty_dev_attr_groups[] = {
- &tty_dev_attr_group,
- NULL
- };
-
-
/**
* uart_add_one_port - attach a driver-defined port structure
* @drv: pointer to the uart low level driver structure for this port
struct tty_port *port;
int ret = 0;
struct device *tty_dev;
+ int num_groups;
BUG_ON(in_interrupt());
uart_configure_port(drv, state, uport);
+ num_groups = 2;
+ if (uport->attr_group)
+ num_groups++;
+
+ uport->tty_groups = kcalloc(num_groups, sizeof(*uport->tty_groups),
+ GFP_KERNEL);
+ if (!uport->tty_groups) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ uport->tty_groups[0] = &tty_dev_attr_group;
+ if (uport->attr_group)
+ uport->tty_groups[1] = uport->attr_group;
+
/*
* Register the port whether it's detected or not. This allows
* setserial to be used to alter this port's parameters.
*/
tty_dev = tty_port_register_device_attr(port, drv->tty_driver,
- uport->line, uport->dev, port, tty_dev_attr_groups);
+ uport->line, uport->dev, port, uport->tty_groups);
if (likely(!IS_ERR(tty_dev))) {
device_set_wakeup_capable(tty_dev, 1);
} else {
- printk(KERN_ERR "Cannot register tty device on line %d\n",
+ dev_err(uport->dev, "Cannot register tty device on line %d\n",
uport->line);
}
BUG_ON(in_interrupt());
if (state->uart_port != uport)
- printk(KERN_ALERT "Removing wrong port: %p != %p\n",
+ dev_alert(uport->dev, "Removing wrong port: %p != %p\n",
state->uart_port, uport);
mutex_lock(&port_mutex);
*/
if (uport->type != PORT_UNKNOWN)
uport->ops->release_port(uport);
+ kfree(uport->tty_groups);
/*
* Indicate that there isn't a port here anymore.
uport->icount.cts++;
- /* skip below code if the hw flow control is supported */
- if (tty_port_cts_enabled(port) &&
- !(uport->flags & UPF_HARD_FLOW)) {
+ if (tty_port_cts_enabled(port)) {
if (tty->hw_stopped) {
if (status) {
tty->hw_stopped = 0;
projects / firefly-linux-kernel-4.4.55.git / blobdiff