#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/tty.h>
+#include <linux/sched.h>
#include <linux/serial.h>
#include <linux/mm.h>
#include <linux/generic_serial.h>
#include <linux/interrupt.h>
#include <linux/tty_flip.h>
#include <linux/delay.h>
+#include <linux/gfp.h>
#include <asm/uaccess.h>
#define DEBUG
#define gs_dprintk(f, str...) /* nothing */
#endif
-#define func_enter() gs_dprintk (GS_DEBUG_FLOW, "gs: enter %s\n", __FUNCTION__)
-#define func_exit() gs_dprintk (GS_DEBUG_FLOW, "gs: exit %s\n", __FUNCTION__)
+#define func_enter() gs_dprintk (GS_DEBUG_FLOW, "gs: enter %s\n", __func__)
+#define func_exit() gs_dprintk (GS_DEBUG_FLOW, "gs: exit %s\n", __func__)
#define RS_EVENT_WRITE_WAKEUP 1
module_param(gs_debug, int, 0644);
-void gs_put_char(struct tty_struct * tty, unsigned char ch)
+int gs_put_char(struct tty_struct * tty, unsigned char ch)
{
struct gs_port *port;
func_enter ();
- if (!tty) return;
-
port = tty->driver_data;
- if (!port) return;
+ if (!port) return 0;
- if (! (port->flags & ASYNC_INITIALIZED)) return;
+ if (! (port->port.flags & ASYNC_INITIALIZED)) return 0;
/* Take a lock on the serial tranmit buffer! */
mutex_lock(& port->port_write_mutex);
if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
/* Sorry, buffer is full, drop character. Update statistics???? -- REW */
mutex_unlock(&port->port_write_mutex);
- return;
+ return 0;
}
port->xmit_buf[port->xmit_head++] = ch;
mutex_unlock(&port->port_write_mutex);
func_exit ();
+ return 1;
}
func_enter ();
- if (!tty) return 0;
-
port = tty->driver_data;
if (!port) return 0;
- if (! (port->flags & ASYNC_INITIALIZED))
+ if (! (port->port.flags & ASYNC_INITIALIZED))
return 0;
/* get exclusive "write" access to this port (problem 3) */
mutex_unlock(& port->port_write_mutex);
gs_dprintk (GS_DEBUG_WRITE, "write: interrupts are %s\n",
- (port->flags & GS_TX_INTEN)?"enabled": "disabled");
+ (port->port.flags & GS_TX_INTEN)?"enabled": "disabled");
if (port->xmit_cnt &&
!tty->stopped &&
!tty->hw_stopped &&
- !(port->flags & GS_TX_INTEN)) {
- port->flags |= GS_TX_INTEN;
+ !(port->port.flags & GS_TX_INTEN)) {
+ port->port.flags |= GS_TX_INTEN;
port->rd->enable_tx_interrupts (port);
}
func_exit ();
struct gs_port *port;
func_enter ();
- if (!tty) return 0;
port = tty->driver_data;
if (!port->rd) return 0;
gs_dprintk (GS_DEBUG_FLUSH, "port=%p.\n", port);
if (port) {
gs_dprintk (GS_DEBUG_FLUSH, "xmit_cnt=%x, xmit_buf=%p, tty=%p.\n",
- port->xmit_cnt, port->xmit_buf, port->tty);
+ port->xmit_cnt, port->xmit_buf, port->port.tty);
}
if (!port || port->xmit_cnt < 0 || !port->xmit_buf) {
return -EINVAL; /* This is an error which we don't know how to handle. */
}
- rcib = gs_real_chars_in_buffer(port->tty);
+ rcib = gs_real_chars_in_buffer(port->port.tty);
if(rcib <= 0) {
gs_dprintk (GS_DEBUG_FLUSH, "nothing to wait for.\n");
/* the expression is actually jiffies < end_jiffies, but that won't
work around the wraparound. Tricky eh? */
- while ((charsleft = gs_real_chars_in_buffer (port->tty)) &&
+ while ((charsleft = gs_real_chars_in_buffer (port->port.tty)) &&
time_after (end_jiffies, jiffies)) {
/* Units check:
chars * (bits/char) * (jiffies /sec) / (bits/sec) = jiffies!
func_enter ();
- if (!tty) return;
-
port = tty->driver_data;
if (!port) return;
func_enter ();
- if (!tty) return;
-
port = tty->driver_data;
if (!port) return;
}
/* Beats me -- REW */
- port->flags |= GS_TX_INTEN;
+ port->port.flags |= GS_TX_INTEN;
port->rd->enable_tx_interrupts (port);
func_exit ();
}
func_enter ();
- if (!tty) return;
-
port = tty->driver_data;
if (!port) return;
if (port->xmit_cnt &&
port->xmit_buf &&
- (port->flags & GS_TX_INTEN) ) {
- port->flags &= ~GS_TX_INTEN;
+ (port->port.flags & GS_TX_INTEN) ) {
+ port->port.flags &= ~GS_TX_INTEN;
port->rd->disable_tx_interrupts (port);
}
func_exit ();
{
struct gs_port *port;
- if (!tty) return;
-
port = tty->driver_data;
if (!port) return;
if (port->xmit_cnt &&
port->xmit_buf &&
- !(port->flags & GS_TX_INTEN) ) {
- port->flags |= GS_TX_INTEN;
+ !(port->port.flags & GS_TX_INTEN) ) {
+ port->port.flags |= GS_TX_INTEN;
port->rd->enable_tx_interrupts (port);
}
func_exit ();
if (!port) return;
- if (!(port->flags & ASYNC_INITIALIZED))
+ if (!(port->port.flags & ASYNC_INITIALIZED))
return;
spin_lock_irqsave(&port->driver_lock, flags);
port->xmit_buf = NULL;
}
- if (port->tty)
- set_bit(TTY_IO_ERROR, &port->tty->flags);
+ if (port->port.tty)
+ set_bit(TTY_IO_ERROR, &port->port.tty->flags);
port->rd->shutdown_port (port);
- port->flags &= ~ASYNC_INITIALIZED;
+ port->port.flags &= ~ASYNC_INITIALIZED;
spin_unlock_irqrestore(&port->driver_lock, flags);
func_exit();
void gs_hangup(struct tty_struct *tty)
{
- struct gs_port *port;
+ struct gs_port *port;
+ unsigned long flags;
func_enter ();
- if (!tty) return;
-
port = tty->driver_data;
- tty = port->tty;
+ tty = port->port.tty;
if (!tty)
return;
gs_shutdown_port (port);
- port->flags &= ~(ASYNC_NORMAL_ACTIVE|GS_ACTIVE);
- port->tty = NULL;
- port->count = 0;
+ spin_lock_irqsave(&port->port.lock, flags);
+ port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|GS_ACTIVE);
+ port->port.tty = NULL;
+ port->port.count = 0;
+ spin_unlock_irqrestore(&port->port.lock, flags);
- wake_up_interruptible(&port->open_wait);
+ wake_up_interruptible(&port->port.open_wait);
func_exit ();
}
int gs_block_til_ready(void *port_, struct file * filp)
{
- struct gs_port *port = port_;
+ struct gs_port *gp = port_;
+ struct tty_port *port = &gp->port;
DECLARE_WAITQUEUE(wait, current);
int retval;
int do_clocal = 0;
tty = port->tty;
- if (!tty) return 0;
-
gs_dprintk (GS_DEBUG_BTR, "Entering gs_block_till_ready.\n");
/*
* If the device is in the middle of being closed, then block
add_wait_queue(&port->open_wait, &wait);
gs_dprintk (GS_DEBUG_BTR, "after add waitq.\n");
- spin_lock_irqsave(&port->driver_lock, flags);
+ spin_lock_irqsave(&port->lock, flags);
if (!tty_hung_up_p(filp)) {
port->count--;
}
- spin_unlock_irqrestore(&port->driver_lock, flags);
port->blocked_open++;
+ spin_unlock_irqrestore(&port->lock, flags);
while (1) {
- CD = port->rd->get_CD (port);
+ CD = tty_port_carrier_raised(port);
gs_dprintk (GS_DEBUG_BTR, "CD is now %d.\n", CD);
set_current_state (TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) ||
port->blocked_open);
set_current_state (TASK_RUNNING);
remove_wait_queue(&port->open_wait, &wait);
+
+ spin_lock_irqsave(&port->lock, flags);
if (!tty_hung_up_p(filp)) {
port->count++;
}
port->blocked_open--;
- if (retval)
- return retval;
-
- port->flags |= ASYNC_NORMAL_ACTIVE;
+ if (retval == 0)
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ spin_unlock_irqrestore(&port->lock, flags);
func_exit ();
- return 0;
+ return retval;
}
func_enter ();
- if (!tty) return;
-
- port = (struct gs_port *) tty->driver_data;
+ port = tty->driver_data;
if (!port) return;
- if (!port->tty) {
+ if (!port->port.tty) {
/* This seems to happen when this is called from vhangup. */
- gs_dprintk (GS_DEBUG_CLOSE, "gs: Odd: port->tty is NULL\n");
- port->tty = tty;
+ gs_dprintk (GS_DEBUG_CLOSE, "gs: Odd: port->port.tty is NULL\n");
+ port->port.tty = tty;
}
- spin_lock_irqsave(&port->driver_lock, flags);
+ spin_lock_irqsave(&port->port.lock, flags);
if (tty_hung_up_p(filp)) {
- spin_unlock_irqrestore(&port->driver_lock, flags);
+ spin_unlock_irqrestore(&port->port.lock, flags);
if (port->rd->hungup)
port->rd->hungup (port);
func_exit ();
return;
}
- if ((tty->count == 1) && (port->count != 1)) {
+ if ((tty->count == 1) && (port->port.count != 1)) {
printk(KERN_ERR "gs: gs_close port %p: bad port count;"
- " tty->count is 1, port count is %d\n", port, port->count);
- port->count = 1;
+ " tty->count is 1, port count is %d\n", port, port->port.count);
+ port->port.count = 1;
}
- if (--port->count < 0) {
- printk(KERN_ERR "gs: gs_close port %p: bad port count: %d\n", port, port->count);
- port->count = 0;
+ if (--port->port.count < 0) {
+ printk(KERN_ERR "gs: gs_close port %p: bad port count: %d\n", port, port->port.count);
+ port->port.count = 0;
}
- if (port->count) {
- gs_dprintk(GS_DEBUG_CLOSE, "gs_close port %p: count: %d\n", port, port->count);
- spin_unlock_irqrestore(&port->driver_lock, flags);
+ if (port->port.count) {
+ gs_dprintk(GS_DEBUG_CLOSE, "gs_close port %p: count: %d\n", port, port->port.count);
+ spin_unlock_irqrestore(&port->port.lock, flags);
func_exit ();
return;
}
- port->flags |= ASYNC_CLOSING;
+ port->port.flags |= ASYNC_CLOSING;
/*
* Now we wait for the transmit buffer to clear; and we notify
* line status register.
*/
+ spin_lock_irqsave(&port->driver_lock, flags);
port->rd->disable_rx_interrupts (port);
spin_unlock_irqrestore(&port->driver_lock, flags);
+ spin_unlock_irqrestore(&port->port.lock, flags);
/* close has no way of returning "EINTR", so discard return value */
if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
gs_wait_tx_flushed (port, port->closing_wait);
- port->flags &= ~GS_ACTIVE;
+ port->port.flags &= ~GS_ACTIVE;
gs_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
+ spin_lock_irqsave(&port->driver_lock, flags);
port->event = 0;
port->rd->close (port);
port->rd->shutdown_port (port);
- port->tty = NULL;
+ spin_unlock_irqrestore(&port->driver_lock, flags);
+
+ spin_lock_irqsave(&port->port.lock, flags);
+ port->port.tty = NULL;
- if (port->blocked_open) {
+ if (port->port.blocked_open) {
if (port->close_delay) {
- spin_unlock_irqrestore(&port->driver_lock, flags);
+ spin_unlock_irqrestore(&port->port.lock, flags);
msleep_interruptible(jiffies_to_msecs(port->close_delay));
- spin_lock_irqsave(&port->driver_lock, flags);
+ spin_lock_irqsave(&port->port.lock, flags);
}
- wake_up_interruptible(&port->open_wait);
+ wake_up_interruptible(&port->port.open_wait);
}
- port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING | ASYNC_INITIALIZED);
- wake_up_interruptible(&port->close_wait);
+ port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING | ASYNC_INITIALIZED);
+ spin_unlock_irqrestore(&port->port.lock, flags);
+ wake_up_interruptible(&port->port.close_wait);
func_exit ();
}
func_enter();
- if (!tty) return;
-
port = tty->driver_data;
if (!port) return;
- if (!port->tty) {
+ if (!port->port.tty) {
/* This seems to happen when this is called after gs_close. */
- gs_dprintk (GS_DEBUG_TERMIOS, "gs: Odd: port->tty is NULL\n");
- port->tty = tty;
+ gs_dprintk (GS_DEBUG_TERMIOS, "gs: Odd: port->port.tty is NULL\n");
+ port->port.tty = tty;
}
baudrate = tty_get_baud_rate(tty);
if ((tiosp->c_cflag & CBAUD) == B38400) {
- if ( (port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ if ( (port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
baudrate = 57600;
- else if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ else if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
baudrate = 115200;
- else if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
+ else if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
baudrate = 230400;
- else if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
+ else if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
baudrate = 460800;
- else if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
+ else if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
baudrate = (port->baud_base / port->custom_divisor);
}
func_enter ();
- if (port->flags & ASYNC_INITIALIZED) {
+ if (port->port.flags & ASYNC_INITIALIZED) {
func_exit ();
return 0;
}
}
spin_lock_irqsave (&port->driver_lock, flags);
- if (port->tty)
- clear_bit(TTY_IO_ERROR, &port->tty->flags);
+ if (port->port.tty)
+ clear_bit(TTY_IO_ERROR, &port->port.tty->flags);
mutex_init(&port->port_write_mutex);
port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
spin_unlock_irqrestore(&port->driver_lock, flags);
- gs_set_termios(port->tty, NULL);
+ gs_set_termios(port->port.tty, NULL);
spin_lock_irqsave (&port->driver_lock, flags);
- port->flags |= ASYNC_INITIALIZED;
- port->flags &= ~GS_TX_INTEN;
+ port->port.flags |= ASYNC_INITIALIZED;
+ port->port.flags &= ~GS_TX_INTEN;
spin_unlock_irqrestore(&port->driver_lock, flags);
func_exit ();
if ((sio.baud_base != port->baud_base) ||
(sio.close_delay != port->close_delay) ||
((sio.flags & ~ASYNC_USR_MASK) !=
- (port->flags & ~ASYNC_USR_MASK)))
+ (port->port.flags & ~ASYNC_USR_MASK)))
return(-EPERM);
}
- port->flags = (port->flags & ~ASYNC_USR_MASK) |
+ port->port.flags = (port->port.flags & ~ASYNC_USR_MASK) |
(sio.flags & ASYNC_USR_MASK);
port->baud_base = sio.baud_base;
port->closing_wait = sio.closing_wait;
port->custom_divisor = sio.custom_divisor;
- gs_set_termios (port->tty, NULL);
+ gs_set_termios (port->port.tty, NULL);
return 0;
}
struct serial_struct sio;
memset(&sio, 0, sizeof(struct serial_struct));
- sio.flags = port->flags;
+ sio.flags = port->port.flags;
sio.baud_base = port->baud_base;
sio.close_delay = port->close_delay;
sio.closing_wait = port->closing_wait;
{
func_enter ();
- tty_insert_flip_char(port->tty, 0, TTY_BREAK);
- tty_schedule_flip(port->tty);
- if (port->flags & ASYNC_SAK) {
- do_SAK (port->tty);
+ tty_insert_flip_char(port->port.tty, 0, TTY_BREAK);
+ tty_schedule_flip(port->port.tty);
+ if (port->port.flags & ASYNC_SAK) {
+ do_SAK (port->port.tty);
}
func_exit ();
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff