#include <asm/irq.h>
#include <asm/uaccess.h>
-#undef DEBUG
-#ifdef DEBUG
-#define DPRINTK(x...) printk(x)
-#else
-#define DPRINTK(x...) do { } while (0)
-#endif
-
/*
* This is used to lock changes in serial line configuration.
*/
#define uart_console(port) (0)
#endif
-static void uart_change_speed(struct uart_state *state, struct termios *old_termios);
+static void uart_change_speed(struct uart_state *state,
+ struct ktermios *old_termios);
static void uart_wait_until_sent(struct tty_struct *tty, int timeout);
static void uart_change_pm(struct uart_state *state, int pm_state);
spin_unlock_irqrestore(&port->lock, flags);
}
-#define uart_set_mctrl(port,set) uart_update_mctrl(port,set,0)
-#define uart_clear_mctrl(port,clear) uart_update_mctrl(port,0,clear)
+#define uart_set_mctrl(port, set) uart_update_mctrl(port, set, 0)
+#define uart_clear_mctrl(port, clear) uart_update_mctrl(port, 0, clear)
/*
* Startup the port. This will be called once per open. All calls
break;
default:
bits = 10;
- break; // CS8
+ break; /* CS8 */
}
if (cflag & CSTOPB)
* If it's still invalid, we try 9600 baud.
*
* Update the @termios structure to reflect the baud rate
- * we're actually going to be using.
+ * we're actually going to be using. Don't do this for the case
+ * where B0 is requested ("hang up").
*/
unsigned int
-uart_get_baud_rate(struct uart_port *port, struct termios *termios,
- struct termios *old, unsigned int min, unsigned int max)
+uart_get_baud_rate(struct uart_port *port, struct ktermios *termios,
+ struct ktermios *old, unsigned int min, unsigned int max)
{
unsigned int try, baud, altbaud = 38400;
+ int hung_up = 0;
upf_t flags = port->flags & UPF_SPD_MASK;
if (flags == UPF_SPD_HI)
/*
* Special case: B0 rate.
*/
- if (baud == 0)
+ if (baud == 0) {
+ hung_up = 1;
baud = 9600;
+ }
if (baud >= min && baud <= max)
return baud;
*/
termios->c_cflag &= ~CBAUD;
if (old) {
- termios->c_cflag |= old->c_cflag & CBAUD;
+ baud = tty_termios_baud_rate(old);
+ if (!hung_up)
+ tty_termios_encode_baud_rate(termios,
+ baud, baud);
old = NULL;
continue;
}
* As a last resort, if the quotient is zero,
* default to 9600 bps
*/
- termios->c_cflag |= B9600;
+ if (!hung_up)
+ tty_termios_encode_baud_rate(termios, 9600, 9600);
}
return 0;
EXPORT_SYMBOL(uart_get_divisor);
static void
-uart_change_speed(struct uart_state *state, struct termios *old_termios)
+uart_change_speed(struct uart_state *state, struct ktermios *old_termios)
{
struct tty_struct *tty = state->info->tty;
struct uart_port *port = state->port;
- struct termios *termios;
+ struct ktermios *termios;
/*
* If we have no tty, termios, or the port does not exist,
return;
}
- DPRINTK("uart_flush_buffer(%d) called\n", tty->index);
+ pr_debug("uart_flush_buffer(%d) called\n", tty->index);
spin_lock_irqsave(&port->lock, flags);
uart_circ_clear(&state->info->xmit);
tmp.close_delay = state->close_delay / 10;
tmp.closing_wait = state->closing_wait == USF_CLOSING_WAIT_NONE ?
ASYNC_CLOSING_WAIT_NONE :
- state->closing_wait / 10;
+ state->closing_wait / 10;
tmp.custom_divisor = port->custom_divisor;
tmp.hub6 = port->hub6;
tmp.io_type = port->iotype;
tmp.iomem_reg_shift = port->regshift;
- tmp.iomem_base = (void *)port->mapbase;
+ tmp.iomem_base = (void *)(unsigned long)port->mapbase;
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
*/
mutex_lock(&state->mutex);
- change_irq = new_serial.irq != port->irq;
+ change_irq = !(port->flags & UPF_FIXED_PORT)
+ && new_serial.irq != port->irq;
/*
* Since changing the 'type' of the port changes its resource
* allocations, we should treat type changes the same as
* IO port changes.
*/
- change_port = new_port != port->iobase ||
- (unsigned long)new_serial.iomem_base != port->mapbase ||
- new_serial.hub6 != port->hub6 ||
- new_serial.io_type != port->iotype ||
- new_serial.iomem_reg_shift != port->regshift ||
- new_serial.type != port->type;
+ change_port = !(port->flags & UPF_FIXED_PORT)
+ && (new_port != port->iobase ||
+ (unsigned long)new_serial.iomem_base != port->mapbase ||
+ new_serial.hub6 != port->hub6 ||
+ new_serial.io_type != port->iotype ||
+ new_serial.iomem_reg_shift != port->regshift ||
+ new_serial.type != port->type);
old_flags = port->flags;
new_flags = new_serial.flags;
* We failed anyway.
*/
retval = -EBUSY;
+ /* Added to return the correct error -Ram Gupta */
+ goto exit;
}
}
- port->irq = new_serial.irq;
- port->uartclk = new_serial.baud_base * 16;
+ if (change_irq)
+ port->irq = new_serial.irq;
+ if (!(port->flags & UPF_FIXED_PORT))
+ port->uartclk = new_serial.baud_base * 16;
port->flags = (port->flags & ~UPF_CHANGE_MASK) |
(new_flags & UPF_CHANGE_MASK);
port->custom_divisor = new_serial.custom_divisor;
((uart_circ_chars_pending(&state->info->xmit) > 0) &&
!state->info->tty->stopped && !state->info->tty->hw_stopped))
result &= ~TIOCSER_TEMT;
-
+
return put_user(result, value);
}
((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
- ret = 0;
- break;
+ ret = 0;
+ break;
}
schedule();
return ret;
}
-static void uart_set_termios(struct tty_struct *tty, struct termios *old_termios)
+static void uart_set_termios(struct tty_struct *tty,
+ struct ktermios *old_termios)
{
struct uart_state *state = tty->driver_data;
unsigned long flags;
/*
* These are the bits that are used to setup various
- * flags in the low level driver.
+ * flags in the low level driver. We can ignore the Bfoo
+ * bits in c_cflag; c_[io]speed will always be set
+ * appropriately by set_termios() in tty_ioctl.c
*/
#define RELEVANT_IFLAG(iflag) ((iflag) & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
-
if ((cflag ^ old_termios->c_cflag) == 0 &&
+ tty->termios->c_ospeed == old_termios->c_ospeed &&
+ tty->termios->c_ispeed == old_termios->c_ispeed &&
RELEVANT_IFLAG(tty->termios->c_iflag ^ old_termios->c_iflag) == 0)
return;
{
struct uart_state *state = tty->driver_data;
struct uart_port *port;
-
+
BUG_ON(!kernel_locked());
if (!state || !state->port)
port = state->port;
- DPRINTK("uart_close(%d) called\n", port->line);
+ pr_debug("uart_close(%d) called\n", port->line);
mutex_lock(&state->mutex);
uart_shutdown(state);
uart_flush_buffer(tty);
- tty_ldisc_flush(tty);
-
+ tty_ldisc_flush(tty);
+
tty->closing = 0;
state->info->tty = NULL;
expire = jiffies + timeout;
- DPRINTK("uart_wait_until_sent(%d), jiffies=%lu, expire=%lu...\n",
- port->line, jiffies, expire);
+ pr_debug("uart_wait_until_sent(%d), jiffies=%lu, expire=%lu...\n",
+ port->line, jiffies, expire);
/*
* Check whether the transmitter is empty every 'char_time'.
struct uart_state *state = tty->driver_data;
BUG_ON(!kernel_locked());
- DPRINTK("uart_hangup(%d)\n", state->port->line);
+ pr_debug("uart_hangup(%d)\n", state->port->line);
mutex_lock(&state->mutex);
if (state->info && state->info->flags & UIF_NORMAL_ACTIVE) {
* have set TTY_IO_ERROR for a non-existant port.
*/
if ((filp->f_flags & O_NONBLOCK) ||
- (info->tty->termios->c_cflag & CLOCAL) ||
- (info->tty->flags & (1 << TTY_IO_ERROR))) {
+ (info->tty->termios->c_cflag & CLOCAL) ||
+ (info->tty->flags & (1 << TTY_IO_ERROR)))
break;
- }
/*
* Set DTR to allow modem to know we're waiting. Do
}
if (!state->info) {
- state->info = kmalloc(sizeof(struct uart_info), GFP_KERNEL);
+ state->info = kzalloc(sizeof(struct uart_info), GFP_KERNEL);
if (state->info) {
- memset(state->info, 0, sizeof(struct uart_info));
init_waitqueue_head(&state->info->open_wait);
init_waitqueue_head(&state->info->delta_msr_wait);
}
/*
- * In 2.4.5, calls to uart_open are serialised by the BKL in
- * linux/fs/devices.c:chrdev_open()
+ * calls to uart_open are serialised by the BKL in
+ * fs/char_dev.c:chrdev_open()
* Note that if this fails, then uart_close() _will_ be called.
*
* In time, we want to scrap the "opening nonpresent ports"
int retval, line = tty->index;
BUG_ON(!kernel_locked());
- DPRINTK("uart_open(%d) called\n", line);
+ pr_debug("uart_open(%d) called\n", line);
/*
* tty->driver->num won't change, so we won't fail here with
static int uart_line_info(char *buf, struct uart_driver *drv, int i)
{
struct uart_state *state = drv->state + i;
+ int pm_state;
struct uart_port *port = state->port;
char stat_buf[32];
unsigned int status;
- int ret;
+ int mmio, ret;
if (!port)
return 0;
- ret = sprintf(buf, "%d: uart:%s %s%08lX irq:%d",
+ mmio = port->iotype >= UPIO_MEM;
+ ret = sprintf(buf, "%d: uart:%s %s%08llX irq:%d",
port->line, uart_type(port),
- port->iotype == UPIO_MEM ? "mmio:0x" : "port:",
- port->iotype == UPIO_MEM ? port->mapbase :
- (unsigned long) port->iobase,
+ mmio ? "mmio:0x" : "port:",
+ mmio ? (unsigned long long)port->mapbase
+ : (unsigned long long) port->iobase,
port->irq);
if (port->type == PORT_UNKNOWN) {
return ret + 1;
}
- if(capable(CAP_SYS_ADMIN))
- {
+ if (capable(CAP_SYS_ADMIN)) {
+ mutex_lock(&state->mutex);
+ pm_state = state->pm_state;
+ if (pm_state)
+ uart_change_pm(state, 0);
spin_lock_irq(&port->lock);
status = port->ops->get_mctrl(port);
spin_unlock_irq(&port->lock);
+ if (pm_state)
+ uart_change_pm(state, pm_state);
+ mutex_unlock(&state->mutex);
ret += sprintf(buf + ret, " tx:%d rx:%d",
port->icount.tx, port->icount.rx);
if (port->icount.overrun)
ret += sprintf(buf + ret, " oe:%d",
port->icount.overrun);
-
-#define INFOBIT(bit,str) \
+
+#define INFOBIT(bit, str) \
if (port->mctrl & (bit)) \
strncat(stat_buf, (str), sizeof(stat_buf) - \
strlen(stat_buf) - 2)
-#define STATBIT(bit,str) \
+#define STATBIT(bit, str) \
if (status & (bit)) \
strncat(stat_buf, (str), sizeof(stat_buf) - \
strlen(stat_buf) - 2)
if (stat_buf[0])
stat_buf[0] = ' ';
strcat(stat_buf, "\n");
-
+
ret += sprintf(buf + ret, stat_buf);
} else {
strcat(buf, "\n");
}
#endif
-#ifdef CONFIG_SERIAL_CORE_CONSOLE
+#if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
/*
* uart_console_write - write a console message to a serial port
* @port: the port to write the message
* options. The format of the string is <baud><parity><bits><flow>,
* eg: 115200n8r
*/
-void __init
+void
uart_parse_options(char *options, int *baud, int *parity, int *bits, int *flow)
{
char *s = options;
if (*s)
*flow = *s;
}
+EXPORT_SYMBOL_GPL(uart_parse_options);
struct baud_rates {
unsigned int rate;
* @bits: number of data bits
* @flow: flow control character - 'r' (rts)
*/
-int __init
+int
uart_set_options(struct uart_port *port, struct console *co,
int baud, int parity, int bits, int flow)
{
- struct termios termios;
+ struct ktermios termios;
+ static struct ktermios dummy;
int i;
/*
spin_lock_init(&port->lock);
lockdep_set_class(&port->lock, &port_lock_key);
- memset(&termios, 0, sizeof(struct termios));
+ memset(&termios, 0, sizeof(struct ktermios));
termios.c_cflag = CREAD | HUPCL | CLOCAL;
if (flow == 'r')
termios.c_cflag |= CRTSCTS;
- port->ops->set_termios(port, &termios, NULL);
- co->cflag = termios.c_cflag;
+ /*
+ * some uarts on other side don't support no flow control.
+ * So we set * DTR in host uart to make them happy
+ */
+ port->mctrl |= TIOCM_DTR;
+
+ port->ops->set_termios(port, &termios, &dummy);
+ /*
+ * Allow the setting of the UART parameters with a NULL console
+ * too:
+ */
+ if (co)
+ co->cflag = termios.c_cflag;
return 0;
}
+EXPORT_SYMBOL_GPL(uart_set_options);
#endif /* CONFIG_SERIAL_CORE_CONSOLE */
static void uart_change_pm(struct uart_state *state, int pm_state)
}
}
+struct uart_match {
+ struct uart_port *port;
+ struct uart_driver *driver;
+};
+
+static int serial_match_port(struct device *dev, void *data)
+{
+ struct uart_match *match = data;
+ dev_t devt = MKDEV(match->driver->major, match->driver->minor) + match->port->line;
+
+ return dev->devt == devt; /* Actually, only one tty per port */
+}
+
int uart_suspend_port(struct uart_driver *drv, struct uart_port *port)
{
struct uart_state *state = drv->state + port->line;
+ struct device *tty_dev;
+ struct uart_match match = {port, drv};
mutex_lock(&state->mutex);
-#ifdef CONFIG_DISABLE_CONSOLE_SUSPEND
- if (uart_console(port)) {
+ if (!console_suspend_enabled && uart_console(port)) {
+ /* we're going to avoid suspending serial console */
mutex_unlock(&state->mutex);
return 0;
}
-#endif
+
+ tty_dev = device_find_child(port->dev, &match, serial_match_port);
+ if (device_may_wakeup(tty_dev)) {
+ enable_irq_wake(port->irq);
+ put_device(tty_dev);
+ mutex_unlock(&state->mutex);
+ return 0;
+ }
+ port->suspended = 1;
if (state->info && state->info->flags & UIF_INITIALIZED) {
const struct uart_ops *ops = port->ops;
+ int tries;
+
+ state->info->flags = (state->info->flags & ~UIF_INITIALIZED)
+ | UIF_SUSPENDED;
spin_lock_irq(&port->lock);
ops->stop_tx(port);
/*
* Wait for the transmitter to empty.
*/
- while (!ops->tx_empty(port)) {
+ for (tries = 3; !ops->tx_empty(port) && tries; tries--)
msleep(10);
- }
+ if (!tries)
+ printk(KERN_ERR "%s%s%s%d: Unable to drain "
+ "transmitter\n",
+ port->dev ? port->dev->bus_id : "",
+ port->dev ? ": " : "",
+ drv->dev_name, port->line);
ops->shutdown(port);
}
mutex_lock(&state->mutex);
-#ifdef CONFIG_DISABLE_CONSOLE_SUSPEND
- if (uart_console(port)) {
+ if (!console_suspend_enabled && uart_console(port)) {
+ /* no need to resume serial console, it wasn't suspended */
mutex_unlock(&state->mutex);
return 0;
}
-#endif
- uart_change_pm(state, 0);
+ if (!port->suspended) {
+ disable_irq_wake(port->irq);
+ mutex_unlock(&state->mutex);
+ return 0;
+ }
+ port->suspended = 0;
/*
* Re-enable the console device after suspending.
*/
if (uart_console(port)) {
- struct termios termios;
+ struct ktermios termios;
/*
* First try to use the console cflag setting.
*/
- memset(&termios, 0, sizeof(struct termios));
+ memset(&termios, 0, sizeof(struct ktermios));
termios.c_cflag = port->cons->cflag;
/*
if (state->info && state->info->tty && termios.c_cflag == 0)
termios = *state->info->tty->termios;
+ uart_change_pm(state, 0);
port->ops->set_termios(port, &termios, NULL);
console_start(port->cons);
}
- if (state->info && state->info->flags & UIF_INITIALIZED) {
+ if (state->info && state->info->flags & UIF_SUSPENDED) {
const struct uart_ops *ops = port->ops;
int ret;
+ uart_change_pm(state, 0);
ops->set_mctrl(port, 0);
ret = ops->startup(port);
if (ret == 0) {
ops->set_mctrl(port, port->mctrl);
ops->start_tx(port);
spin_unlock_irq(&port->lock);
+ state->info->flags |= UIF_INITIALIZED;
} else {
/*
* Failed to resume - maybe hardware went away?
* Clear the "initialized" flag so we won't try
* to call the low level drivers shutdown method.
*/
- state->info->flags &= ~UIF_INITIALIZED;
uart_shutdown(state);
}
+
+ state->info->flags &= ~UIF_SUSPENDED;
}
mutex_unlock(&state->mutex);
case UPIO_MEM32:
case UPIO_AU:
case UPIO_TSI:
+ case UPIO_DWAPB:
snprintf(address, sizeof(address),
- "MMIO 0x%lx", port->mapbase);
+ "MMIO 0x%llx", (unsigned long long)port->mapbase);
break;
default:
strlcpy(address, "*unknown*", sizeof(address));
uart_report_port(drv, port);
+ /* Power up port for set_mctrl() */
+ uart_change_pm(state, 0);
+
/*
* Ensure that the modem control lines are de-activated.
+ * keep the DTR setting that is set in uart_set_options()
* We probably don't need a spinlock around this, but
*/
spin_lock_irqsave(&port->lock, flags);
- port->ops->set_mctrl(port, 0);
+ port->ops->set_mctrl(port, port->mctrl & TIOCM_DTR);
spin_unlock_irqrestore(&port->lock, flags);
/*
+ * If this driver supports console, and it hasn't been
+ * successfully registered yet, try to re-register it.
+ * It may be that the port was not available.
+ */
+ if (port->cons && !(port->cons->flags & CON_ENABLED))
+ register_console(port->cons);
+
+ /*
* Power down all ports by default, except the
* console if we have one.
*/
}
}
+#ifdef CONFIG_CONSOLE_POLL
+
+static int uart_poll_init(struct tty_driver *driver, int line, char *options)
+{
+ struct uart_driver *drv = driver->driver_state;
+ struct uart_state *state = drv->state + line;
+ struct uart_port *port;
+ int baud = 9600;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+
+ if (!state || !state->port)
+ return -1;
+
+ port = state->port;
+ if (!(port->ops->poll_get_char && port->ops->poll_put_char))
+ return -1;
+
+ if (options) {
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+ return uart_set_options(port, NULL, baud, parity, bits, flow);
+ }
+
+ return 0;
+}
+
+static int uart_poll_get_char(struct tty_driver *driver, int line)
+{
+ struct uart_driver *drv = driver->driver_state;
+ struct uart_state *state = drv->state + line;
+ struct uart_port *port;
+
+ if (!state || !state->port)
+ return -1;
+
+ port = state->port;
+ return port->ops->poll_get_char(port);
+}
+
+static void uart_poll_put_char(struct tty_driver *driver, int line, char ch)
+{
+ struct uart_driver *drv = driver->driver_state;
+ struct uart_state *state = drv->state + line;
+ struct uart_port *port;
+
+ if (!state || !state->port)
+ return;
+
+ port = state->port;
+ port->ops->poll_put_char(port, ch);
+}
+#endif
+
static const struct tty_operations uart_ops = {
.open = uart_open,
.close = uart_close,
#endif
.tiocmget = uart_tiocmget,
.tiocmset = uart_tiocmset,
+#ifdef CONFIG_CONSOLE_POLL
+ .poll_init = uart_poll_init,
+ .poll_get_char = uart_poll_get_char,
+ .poll_put_char = uart_poll_put_char,
+#endif
};
/**
* Maybe we should be using a slab cache for this, especially if
* we have a large number of ports to handle.
*/
- drv->state = kmalloc(sizeof(struct uart_state) * drv->nr, GFP_KERNEL);
+ drv->state = kzalloc(sizeof(struct uart_state) * drv->nr, GFP_KERNEL);
retval = -ENOMEM;
if (!drv->state)
goto out;
- memset(drv->state, 0, sizeof(struct uart_state) * drv->nr);
-
normal = alloc_tty_driver(drv->nr);
if (!normal)
goto out;
normal->subtype = SERIAL_TYPE_NORMAL;
normal->init_termios = tty_std_termios;
normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ normal->init_termios.c_ispeed = normal->init_termios.c_ospeed = 9600;
normal->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
normal->driver_state = drv;
tty_set_operations(normal, &uart_ops);
{
struct uart_state *state;
int ret = 0;
+ struct device *tty_dev;
BUG_ON(in_interrupt());
}
state->port = port;
+ state->pm_state = -1;
port->cons = drv->cons;
port->info = state->info;
* Register the port whether it's detected or not. This allows
* setserial to be used to alter this ports parameters.
*/
- tty_register_device(drv->tty_driver, port->line, port->dev);
-
- /*
- * If this driver supports console, and it hasn't been
- * successfully registered yet, try to re-register it.
- * It may be that the port was not available.
- */
- if (port->type != PORT_UNKNOWN &&
- port->cons && !(port->cons->flags & CON_ENABLED))
- register_console(port->cons);
+ tty_dev = tty_register_device(drv->tty_driver, port->line, port->dev);
+ if (likely(!IS_ERR(tty_dev))) {
+ device_init_wakeup(tty_dev, 1);
+ device_set_wakeup_enable(tty_dev, 0);
+ } else
+ printk(KERN_ERR "Cannot register tty device on line %d\n",
+ port->line);
/*
* Ensure UPF_DEAD is not set.
case UPIO_MEM32:
case UPIO_AU:
case UPIO_TSI:
+ case UPIO_DWAPB:
return (port1->mapbase == port2->mapbase);
}
return 0;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff