#include <linux/delay.h>
#include <linux/tty_flip.h>
#include <linux/spinlock.h>
+#include <linux/device.h>
#include <linux/uaccess.h>
rc_shutdown_board(bp);
}
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
- struct riscom_port *port)
+static int carrier_raised(struct tty_port *port)
{
- DECLARE_WAITQUEUE(wait, current);
- struct riscom_board *bp = port_Board(port);
- int retval;
- int do_clocal = 0;
- int CD;
+ struct riscom_port *p = container_of(port, struct riscom_port, port);
+ struct riscom_board *bp = port_Board(p);
unsigned long flags;
-
- /*
- * If the device is in the middle of being closed, then block
- * until it's done, and then try again.
- */
- if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) {
- interruptible_sleep_on(&port->port.close_wait);
- if (port->port.flags & ASYNC_HUP_NOTIFY)
- return -EAGAIN;
- else
- return -ERESTARTSYS;
- }
-
- /*
- * If non-blocking mode is set, or the port is not enabled,
- * then make the check up front and then exit.
- */
- if ((filp->f_flags & O_NONBLOCK) ||
- (tty->flags & (1 << TTY_IO_ERROR))) {
- port->port.flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
- }
-
- if (C_CLOCAL(tty))
- do_clocal = 1;
-
- /*
- * Block waiting for the carrier detect and the line to become
- * free (i.e., not in use by the callout). While we are in
- * this loop, info->count is dropped by one, so that
- * rs_close() knows when to free things. We restore it upon
- * exit, either normal or abnormal.
- */
- retval = 0;
- add_wait_queue(&port->port.open_wait, &wait);
-
+ int CD;
+
spin_lock_irqsave(&riscom_lock, flags);
-
- if (!tty_hung_up_p(filp))
- port->port.count--;
-
+ rc_out(bp, CD180_CAR, port_No(p));
+ CD = rc_in(bp, CD180_MSVR) & MSVR_CD;
+ rc_out(bp, CD180_MSVR, MSVR_RTS);
+ bp->DTR &= ~(1u << port_No(p));
+ rc_out(bp, RC_DTR, bp->DTR);
spin_unlock_irqrestore(&riscom_lock, flags);
-
- port->port.blocked_open++;
- while (1) {
- spin_lock_irqsave(&riscom_lock, flags);
-
- rc_out(bp, CD180_CAR, port_No(port));
- CD = rc_in(bp, CD180_MSVR) & MSVR_CD;
- rc_out(bp, CD180_MSVR, MSVR_RTS);
- bp->DTR &= ~(1u << port_No(port));
- rc_out(bp, RC_DTR, bp->DTR);
-
- spin_unlock_irqrestore(&riscom_lock, flags);
-
- set_current_state(TASK_INTERRUPTIBLE);
- if (tty_hung_up_p(filp) ||
- !(port->port.flags & ASYNC_INITIALIZED)) {
- if (port->port.flags & ASYNC_HUP_NOTIFY)
- retval = -EAGAIN;
- else
- retval = -ERESTARTSYS;
- break;
- }
- if (!(port->port.flags & ASYNC_CLOSING) &&
- (do_clocal || CD))
- break;
- if (signal_pending(current)) {
- retval = -ERESTARTSYS;
- break;
- }
- schedule();
- }
- __set_current_state(TASK_RUNNING);
- remove_wait_queue(&port->port.open_wait, &wait);
- if (!tty_hung_up_p(filp))
- port->port.count++;
- port->port.blocked_open--;
- if (retval)
- return retval;
-
- port->port.flags |= ASYNC_NORMAL_ACTIVE;
- return 0;
+ return CD;
}
static int rc_open(struct tty_struct *tty, struct file *filp)
error = rc_setup_port(bp, port);
if (error == 0)
- error = block_til_ready(tty, filp, port);
+ error = tty_port_block_til_ready(&port->port, tty, filp);
return error;
}
static void rc_flush_buffer(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
unsigned long flags;
if (rc_paranoia_check(port, tty->name, "rc_flush_buffer"))
static void rc_close(struct tty_struct *tty, struct file *filp)
{
- struct riscom_port *port = (struct riscom_port *) tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
unsigned long timeout;
if (!port || rc_paranoia_check(port, tty->name, "close"))
return;
- spin_lock_irqsave(&riscom_lock, flags);
-
- if (tty_hung_up_p(filp))
- goto out;
-
bp = port_Board(port);
- if ((tty->count == 1) && (port->port.count != 1)) {
- printk(KERN_INFO "rc%d: rc_close: bad port count;"
- " tty->count is 1, port count is %d\n",
- board_No(bp), port->port.count);
- port->port.count = 1;
- }
- if (--port->port.count < 0) {
- printk(KERN_INFO "rc%d: rc_close: bad port count "
- "for tty%d: %d\n",
- board_No(bp), port_No(port), port->port.count);
- port->port.count = 0;
- }
- if (port->port.count)
- goto out;
- port->port.flags |= ASYNC_CLOSING;
- /*
- * Now we wait for the transmit buffer to clear; and we notify
- * the line discipline to only process XON/XOFF characters.
- */
- tty->closing = 1;
- if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
- tty_wait_until_sent(tty, port->port.closing_wait);
+
+ if (tty_port_close_start(&port->port, tty, filp) == 0)
+ return;
+
/*
* At this point we stop accepting input. To do this, we
* disable the receive line status interrupts, and tell the
* interrupt driver to stop checking the data ready bit in the
* line status register.
*/
+
+ spin_lock_irqsave(&riscom_lock, flags);
port->IER &= ~IER_RXD;
if (port->port.flags & ASYNC_INITIALIZED) {
port->IER &= ~IER_TXRDY;
*/
timeout = jiffies + HZ;
while (port->IER & IER_TXEMPTY) {
+ spin_unlock_irqrestore(&riscom_lock, flags);
msleep_interruptible(jiffies_to_msecs(port->timeout));
+ spin_lock_irqsave(&riscom_lock, flags);
if (time_after(jiffies, timeout))
break;
}
}
rc_shutdown_port(tty, bp, port);
rc_flush_buffer(tty);
- tty_ldisc_flush(tty);
-
- tty->closing = 0;
- port->port.tty = NULL;
- if (port->port.blocked_open) {
- if (port->port.close_delay)
- msleep_interruptible(jiffies_to_msecs(port->port.close_delay));
- wake_up_interruptible(&port->port.open_wait);
- }
- port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
- wake_up_interruptible(&port->port.close_wait);
-
-out:
spin_unlock_irqrestore(&riscom_lock, flags);
+
+ tty_port_close_end(&port->port, tty);
}
static int rc_write(struct tty_struct *tty,
const unsigned char *buf, int count)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
int c, total = 0;
unsigned long flags;
static int rc_put_char(struct tty_struct *tty, unsigned char ch)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
unsigned long flags;
int ret = 0;
static void rc_flush_chars(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
unsigned long flags;
if (rc_paranoia_check(port, tty->name, "rc_flush_chars"))
static int rc_write_room(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
int ret;
if (rc_paranoia_check(port, tty->name, "rc_write_room"))
static int rc_chars_in_buffer(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer"))
return 0;
static int rc_tiocmget(struct tty_struct *tty, struct file *file)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned char status;
unsigned int result;
static int rc_tiocmset(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
unsigned long flags;
struct riscom_board *bp;
return 0;
}
-static void rc_send_break(struct riscom_port *port, unsigned long length)
+static int rc_send_break(struct tty_struct *tty, int length)
{
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp = port_Board(port);
unsigned long flags;
+ if (length == 0 || length == -1)
+ return -EOPNOTSUPP;
+
spin_lock_irqsave(&riscom_lock, flags);
port->break_length = RISCOM_TPS / HZ * length;
rc_wait_CCR(bp);
spin_unlock_irqrestore(&riscom_lock, flags);
+ return 0;
}
static int rc_set_serial_info(struct riscom_port *port,
static int rc_ioctl(struct tty_struct *tty, struct file *filp,
unsigned int cmd, unsigned long arg)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
void __user *argp = (void __user *)arg;
- int retval = 0;
+ int retval;
if (rc_paranoia_check(port, tty->name, "rc_ioctl"))
return -ENODEV;
switch (cmd) {
- case TCSBRK: /* SVID version: non-zero arg --> no break */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- if (!arg)
- rc_send_break(port, HZ/4); /* 1/4 second */
- break;
- case TCSBRKP: /* support for POSIX tcsendbreak() */
- retval = tty_check_change(tty);
- if (retval)
- return retval;
- tty_wait_until_sent(tty, 0);
- rc_send_break(port, arg ? arg*(HZ/10) : HZ/4);
- break;
case TIOCGSERIAL:
lock_kernel();
retval = rc_get_serial_info(port, argp);
static void rc_throttle(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
static void rc_unthrottle(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
static void rc_stop(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
static void rc_start(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
unsigned long flags;
static void rc_hangup(struct tty_struct *tty)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
struct riscom_board *bp;
+ unsigned long flags;
if (rc_paranoia_check(port, tty->name, "rc_hangup"))
return;
bp = port_Board(port);
rc_shutdown_port(tty, bp, port);
+ spin_lock_irqsave(&port->port.lock, flags);
port->port.count = 0;
port->port.flags &= ~ASYNC_NORMAL_ACTIVE;
port->port.tty = NULL;
wake_up_interruptible(&port->port.open_wait);
+ spin_unlock_irqrestore(&port->port.lock, flags);
}
static void rc_set_termios(struct tty_struct *tty,
struct ktermios *old_termios)
{
- struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_port *port = tty->driver_data;
unsigned long flags;
if (rc_paranoia_check(port, tty->name, "rc_set_termios"))
.hangup = rc_hangup,
.tiocmget = rc_tiocmget,
.tiocmset = rc_tiocmset,
+ .break_ctl = rc_send_break,
};
+static const struct tty_port_operations riscom_port_ops = {
+ .carrier_raised = carrier_raised,
+};
+
+
static int __init rc_init_drivers(void)
{
int error;
B9600 | CS8 | CREAD | HUPCL | CLOCAL;
riscom_driver->init_termios.c_ispeed = 9600;
riscom_driver->init_termios.c_ospeed = 9600;
- riscom_driver->flags = TTY_DRIVER_REAL_RAW;
+ riscom_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK;
tty_set_operations(riscom_driver, &riscom_ops);
error = tty_register_driver(riscom_driver);
if (error != 0) {
memset(rc_port, 0, sizeof(rc_port));
for (i = 0; i < RC_NPORT * RC_NBOARD; i++) {
tty_port_init(&rc_port[i].port);
+ rc_port[i].port.ops = &riscom_port_ops;
rc_port[i].magic = RISCOM8_MAGIC;
}
return 0;
module_param(iobase3, int, 0);
MODULE_LICENSE("GPL");
+MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR);
#endif /* MODULE */
/*
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff