printk(KERN_ERR "simserial: do_softint called\n");
}
-static void rs_put_char(struct tty_struct *tty, unsigned char ch)
+static int rs_put_char(struct tty_struct *tty, unsigned char ch)
{
struct async_struct *info = (struct async_struct *)tty->driver_data;
unsigned long flags;
- if (!tty || !info->xmit.buf) return;
+ if (!tty || !info->xmit.buf)
+ return 0;
local_irq_save(flags);
if (CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE) == 0) {
local_irq_restore(flags);
- return;
+ return 0;
}
info->xmit.buf[info->xmit.head] = ch;
info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1);
local_irq_restore(flags);
+ return 1;
}
static void transmit_chars(struct async_struct *info, int *intr_done)
* the line discipline to only process XON/XOFF characters.
*/
shutdown(info);
- if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty);
+ if (tty->ops->flush_buffer)
+ tty->ops->flush_buffer(tty);
if (tty->ldisc.flush_buffer) tty->ldisc.flush_buffer(tty);
info->event = 0;
info->tty = NULL;
int len;
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- len = tty->driver->write(tty, skb->data, skb->len);
+ len = tty->ops->write(tty, skb->data, skb->len);
hdev->stat.byte_tx += len;
skb_pull(skb, len);
/* Flush any pending characters in the driver and discipline. */
tty_ldisc_flush(tty);
- if (tty->driver && tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
hu->proto->flush(hu);
if (tty->ldisc.flush_buffer)
tty->ldisc.flush_buffer(tty);
-
- if (tty->driver && tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
return 0;
}
spin_unlock(&hu->rx_lock);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
- tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
static int hci_uart_register_dev(struct hci_uart *hu)
static int ip2_open(PTTY, struct file *);
static void ip2_close(PTTY, struct file *);
static int ip2_write(PTTY, const unsigned char *, int);
-static void ip2_putchar(PTTY, unsigned char);
+static int ip2_putchar(PTTY, unsigned char);
static void ip2_flush_chars(PTTY);
static int ip2_write_room(PTTY);
static int ip2_chars_in_buf(PTTY);
serviceOutgoingFifo ( pCh->pMyBord );
- if ( tty->driver->flush_buffer )
- tty->driver->flush_buffer(tty);
- if ( tty->ldisc.flush_buffer )
- tty->ldisc.flush_buffer(tty);
+ if ( tty->driver->ops->flush_buffer )
+ tty->driver->ops->flush_buffer(tty);
+ tty_ldisc_flush(tty);
tty->closing = 0;
pCh->pTTY = NULL;
/* */
/* */
/******************************************************************************/
-static void
+static int
ip2_putchar( PTTY tty, unsigned char ch )
{
i2ChanStrPtr pCh = tty->driver_data;
ip2_flush_chars( tty );
} else
write_unlock_irqrestore(&pCh->Pbuf_spinlock, flags);
+ return 1;
// ip2trace (CHANN, ITRC_PUTC, ITRC_RETURN, 1, ch );
}
}
/* put_char et all */
-static void isicom_put_char(struct tty_struct *tty, unsigned char ch)
+static int isicom_put_char(struct tty_struct *tty, unsigned char ch)
{
struct isi_port *port = tty->driver_data;
struct isi_board *card = port->card;
unsigned long flags;
if (isicom_paranoia_check(port, tty->name, "isicom_put_char"))
- return;
+ return 0;
if (!port->xmit_buf)
- return;
+ return 0;
spin_lock_irqsave(&card->card_lock, flags);
- if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
- goto out;
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ spin_unlock_irqrestore(&card->card_lock, flags);
+ return 0;
+ }
port->xmit_buf[port->xmit_head++] = ch;
port->xmit_head &= (SERIAL_XMIT_SIZE - 1);
port->xmit_cnt++;
spin_unlock_irqrestore(&card->card_lock, flags);
-out:
- return;
+ return 1;
}
/* flush_chars et all */
if (rep &&
(!vc_kbd_mode(kbd, VC_REPEAT) ||
- (tty && !L_ECHO(tty) && tty->driver->chars_in_buffer(tty)))) {
+ (tty && !L_ECHO(tty) && tty_chars_in_buffer(tty)))) {
/*
* Don't repeat a key if the input buffers are not empty and the
* characters get aren't echoed locally. This makes key repeat
#endif
/* Flush any pending characters in the driver and discipline. */
-
if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer (tty);
+ tty->ldisc.flush_buffer(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer (tty);
+ tty_driver_flush_buffer(tty);
if (debuglevel >= DEBUG_LEVEL_INFO)
printk("%s(%d)n_hdlc_tty_open() success\n",__FILE__,__LINE__);
/* Send the next block of data to device */
tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
- actual = tty->driver->write(tty, tbuf->buf, tbuf->count);
+ actual = tty->ops->write(tty, tbuf->buf, tbuf->count);
/* rollback was possible and has been done */
if (actual == -ERESTARTSYS) {
case TIOCOUTQ:
/* get the pending tx byte count in the driver */
- count = tty->driver->chars_in_buffer ?
- tty->driver->chars_in_buffer(tty) : 0;
+ count = tty_chars_in_buffer(tty);
/* add size of next output frame in queue */
spin_lock_irqsave(&n_hdlc->tx_buf_list.spinlock,flags);
if (n_hdlc->tx_buf_list.head)
if (tty == NULL)
return;
- if (tty->driver->put_char) {
- tty->driver->put_char(tty, ch);
+ /* FIXME: put_char should not be called from an IRQ */
+ if (tty->ops->put_char) {
+ tty->ops->put_char(tty, ch);
}
pInfo->bcc ^= ch;
}
{
struct tty_struct *tty = pInfo->tty;
- if (tty == NULL)
+ if (tty == NULL || tty->ops->flush_chars == NULL)
return;
-
- if (tty->driver->flush_chars) {
- tty->driver->flush_chars(tty);
- }
+ tty->ops->flush_chars(tty);
}
static void trigger_transmit(struct r3964_info *pInfo)
struct r3964_block_header *pBlock = pInfo->tx_first;
int room = 0;
- if ((tty == NULL) || (pBlock == NULL)) {
+ if (tty == NULL || pBlock == NULL) {
return;
}
- if (tty->driver->write_room)
- room = tty->driver->write_room(tty);
+ room = tty_write_room(tty);
TRACE_PS("transmit_block %p, room %d, length %d",
pBlock, room, pBlock->length);
{
if (tty->count &&
test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
- tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
/**
{
int space, spaces;
- space = tty->driver->write_room(tty);
+ space = tty_write_room(tty);
if (!space)
return -1;
if (O_ONLCR(tty)) {
if (space < 2)
return -1;
- tty->driver->put_char(tty, '\r');
+ tty_put_char(tty, '\r');
tty->column = 0;
}
tty->canon_column = tty->column;
if (space < spaces)
return -1;
tty->column += spaces;
- tty->driver->write(tty, " ", spaces);
+ tty->ops->write(tty, " ", spaces);
return 0;
}
tty->column += spaces;
break;
}
}
- tty->driver->put_char(tty, c);
+ tty_put_char(tty, c);
unlock_kernel();
return 0;
}
int i;
const unsigned char *cp;
- space = tty->driver->write_room(tty);
+ space = tty_write_room(tty);
if (!space)
return 0;
if (nr > space)
}
}
break_out:
- if (tty->driver->flush_chars)
- tty->driver->flush_chars(tty);
- i = tty->driver->write(tty, buf, i);
+ if (tty->ops->flush_chars)
+ tty->ops->flush_chars(tty);
+ i = tty->ops->write(tty, buf, i);
unlock_kernel();
return i;
}
-/**
- * put_char - write character to driver
- * @c: character (or part of unicode symbol)
- * @tty: terminal device
- *
- * Queue a byte to the driver layer for output
- */
-
-static inline void put_char(unsigned char c, struct tty_struct *tty)
-{
- tty->driver->put_char(tty, c);
-}
-
/**
* echo_char - echo characters
* @c: unicode byte to echo
static void echo_char(unsigned char c, struct tty_struct *tty)
{
if (L_ECHOCTL(tty) && iscntrl(c) && c != '\t') {
- put_char('^', tty);
- put_char(c ^ 0100, tty);
+ tty_put_char(tty, '^');
+ tty_put_char(tty, c ^ 0100);
tty->column += 2;
} else
opost(c, tty);
static inline void finish_erasing(struct tty_struct *tty)
{
if (tty->erasing) {
- put_char('/', tty);
+ tty_put_char(tty, '/');
tty->column++;
tty->erasing = 0;
}
if (L_ECHO(tty)) {
if (L_ECHOPRT(tty)) {
if (!tty->erasing) {
- put_char('\\', tty);
+ tty_put_char(tty, '\\');
tty->column++;
tty->erasing = 1;
}
echo_char(c, tty);
while (--cnt > 0) {
head = (head+1) & (N_TTY_BUF_SIZE-1);
- put_char(tty->read_buf[head], tty);
+ tty_put_char(tty, tty->read_buf[head]);
}
} else if (kill_type == ERASE && !L_ECHOE(tty)) {
echo_char(ERASE_CHAR(tty), tty);
/* Now backup to that column. */
while (tty->column > col) {
/* Can't use opost here. */
- put_char('\b', tty);
+ tty_put_char(tty, '\b');
if (tty->column > 0)
tty->column--;
}
} else {
if (iscntrl(c) && L_ECHOCTL(tty)) {
- put_char('\b', tty);
- put_char(' ', tty);
- put_char('\b', tty);
+ tty_put_char(tty, '\b');
+ tty_put_char(tty, ' ');
+ tty_put_char(tty, '\b');
if (tty->column > 0)
tty->column--;
}
if (!iscntrl(c) || L_ECHOCTL(tty)) {
- put_char('\b', tty);
- put_char(' ', tty);
- put_char('\b', tty);
+ tty_put_char(tty, '\b');
+ tty_put_char(tty, ' ');
+ tty_put_char(tty, '\b');
if (tty->column > 0)
tty->column--;
}
kill_pgrp(tty->pgrp, sig, 1);
if (flush || !L_NOFLSH(tty)) {
n_tty_flush_buffer(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
}
}
tty->lnext = 0;
if (L_ECHO(tty)) {
if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
- put_char('\a', tty); /* beep if no space */
+ tty_put_char(tty, '\a'); /* beep if no space */
return;
}
/* Record the column of first canon char. */
*/
if (!L_NOFLSH(tty)) {
n_tty_flush_buffer(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
}
if (L_ECHO(tty))
echo_char(c, tty);
if (L_ECHO(tty)) {
finish_erasing(tty);
if (L_ECHOCTL(tty)) {
- put_char('^', tty);
- put_char('\b', tty);
+ tty_put_char(tty, '^');
+ tty_put_char(tty, '\b');
}
}
return;
if (c == '\n') {
if (L_ECHO(tty) || L_ECHONL(tty)) {
if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
- put_char('\a', tty);
+ tty_put_char(tty, '\a');
opost('\n', tty);
}
goto handle_newline;
*/
if (L_ECHO(tty)) {
if (tty->read_cnt >= N_TTY_BUF_SIZE-1)
- put_char('\a', tty);
+ tty_put_char(tty, '\a');
/* Record the column of first canon char. */
if (tty->canon_head == tty->read_head)
tty->canon_column = tty->column;
finish_erasing(tty);
if (L_ECHO(tty)) {
if (tty->read_cnt >= N_TTY_BUF_SIZE-1) {
- put_char('\a', tty); /* beep if no space */
+ tty_put_char(tty, '\a'); /* beep if no space */
return;
}
if (c == '\n')
break;
}
}
- if (tty->driver->flush_chars)
- tty->driver->flush_chars(tty);
+ if (tty->ops->flush_chars)
+ tty->ops->flush_chars(tty);
}
n_tty_set_room(tty);
if (tty->receive_room < TTY_THRESHOLD_THROTTLE) {
/* check TTY_THROTTLED first so it indicates our state */
if (!test_and_set_bit(TTY_THROTTLED, &tty->flags) &&
- tty->driver->throttle)
- tty->driver->throttle(tty);
+ tty->ops->throttle)
+ tty->ops->throttle(tty);
}
}
tty->real_raw = 0;
}
n_tty_set_room(tty);
+ /* The termios change make the tty ready for I/O */
+ wake_up_interruptible(&tty->write_wait);
+ wake_up_interruptible(&tty->read_wait);
}
/**
break;
b++; nr--;
}
- if (tty->driver->flush_chars)
- tty->driver->flush_chars(tty);
+ if (tty->ops->flush_chars)
+ tty->ops->flush_chars(tty);
} else {
while (nr > 0) {
- c = tty->driver->write(tty, b, nr);
+ c = tty->ops->write(tty, b, nr);
if (c < 0) {
retval = c;
goto break_out;
*
* This code must be sure never to sleep through a hangup.
* Called without the kernel lock held - fine
- *
- * FIXME: if someone changes the VMIN or discipline settings for the
- * terminal while another process is in poll() the poll does not
- * recompute the new limits. Possibly set_termios should issue
- * a read wakeup to fix this bug.
*/
static unsigned int normal_poll(struct tty_struct *tty, struct file *file,
else
tty->minimum_to_wake = 1;
}
- if (!tty_is_writelocked(tty) &&
- tty->driver->chars_in_buffer(tty) < WAKEUP_CHARS &&
- tty->driver->write_room(tty) > 0)
+ if (tty->ops->write && !tty_is_writelocked(tty) &&
+ tty_chars_in_buffer(tty) < WAKEUP_CHARS &&
+ tty_write_room(tty) > 0)
mask |= POLLOUT | POLLWRNORM;
return mask;
}
a reference to the old ldisc. If we ended up flipping back
to the existing ldisc we have two references to it */
- if (tty->ldisc.num != o_ldisc.num && tty->driver->set_ldisc)
- tty->driver->set_ldisc(tty);
+ if (tty->ldisc.num != o_ldisc.num && tty->ops->set_ldisc)
+ tty->ops->set_ldisc(tty);
tty_ldisc_put(o_ldisc.num);
if (*str == '\0')
str = NULL;
- if (tty_line >= 0 && tty_line <= p->num && p->poll_init &&
- !p->poll_init(p, tty_line, str)) {
-
+ if (tty_line >= 0 && tty_line <= p->num && p->ops &&
+ p->ops->poll_init && !p->ops->poll_init(p, tty_line, str)) {
res = p;
*line = tty_line;
break;
/* We may have no line discipline at this point */
if (ld->flush_buffer)
ld->flush_buffer(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
if ((test_bit(TTY_DO_WRITE_WAKEUP, &tty->flags)) &&
ld->write_wakeup)
ld->write_wakeup(tty);
* So we just call close() the right number of times.
*/
if (cons_filp) {
- if (tty->driver->close)
+ if (tty->ops->close)
for (n = 0; n < closecount; n++)
- tty->driver->close(tty, cons_filp);
- } else if (tty->driver->hangup)
- (tty->driver->hangup)(tty);
+ tty->ops->close(tty, cons_filp);
+ } else if (tty->ops->hangup)
+ (tty->ops->hangup)(tty);
/*
* We don't want to have driver/ldisc interactions beyond
* the ones we did here. The driver layer expects no
wake_up_interruptible(&tty->link->read_wait);
}
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- if (tty->driver->stop)
- (tty->driver->stop)(tty);
+ if (tty->ops->stop)
+ (tty->ops->stop)(tty);
}
EXPORT_SYMBOL(stop_tty);
wake_up_interruptible(&tty->link->read_wait);
}
spin_unlock_irqrestore(&tty->ctrl_lock, flags);
- if (tty->driver->start)
- (tty->driver->start)(tty);
+ if (tty->ops->start)
+ (tty->ops->start)(tty);
/* If we have a running line discipline it may need kicking */
tty_wakeup(tty);
}
tty = (struct tty_struct *)file->private_data;
if (tty_paranoia_check(tty, inode, "tty_write"))
return -EIO;
- if (!tty || !tty->driver->write ||
+ if (!tty || !tty->ops->write ||
(test_bit(TTY_IO_ERROR, &tty->flags)))
return -EIO;
-
+ /* Short term debug to catch buggy drivers */
+ if (tty->ops->write_room == NULL)
+ printk(KERN_ERR "tty driver %s lacks a write_room method.\n",
+ tty->driver->name);
ld = tty_ldisc_ref_wait(tty);
if (!ld->write)
ret = -EIO;
goto fail_no_mem;
initialize_tty_struct(tty);
tty->driver = driver;
+ tty->ops = driver->ops;
tty->index = idx;
tty_line_name(driver, idx, tty->name);
goto free_mem_out;
initialize_tty_struct(o_tty);
o_tty->driver = driver->other;
+ o_tty->ops = driver->ops;
o_tty->index = idx;
tty_line_name(driver->other, idx, o_tty->name);
}
}
#endif
- if (tty->driver->close)
- tty->driver->close(tty, filp);
+ if (tty->ops->close)
+ tty->ops->close(tty, filp);
/*
* Sanity check: if tty->count is going to zero, there shouldn't be
printk(KERN_DEBUG "opening %s...", tty->name);
#endif
if (!retval) {
- if (tty->driver->open)
- retval = tty->driver->open(tty, filp);
+ if (tty->ops->open)
+ retval = tty->ops->open(tty, filp);
else
retval = -ENODEV;
}
goto out1;
check_tty_count(tty, "tty_open");
- retval = ptm_driver->open(tty, filp);
+ retval = ptm_driver->ops->open(tty, filp);
if (!retval)
return 0;
out1:
static int send_break(struct tty_struct *tty, unsigned int duration)
{
- int retval = -EINTR;
-
- lock_kernel();
if (tty_write_lock(tty, 0) < 0)
- goto out;
- tty->driver->break_ctl(tty, -1);
+ return -EINTR;
+ tty->ops->break_ctl(tty, -1);
if (!signal_pending(current))
msleep_interruptible(duration);
- tty->driver->break_ctl(tty, 0);
+ tty->ops->break_ctl(tty, 0);
tty_write_unlock(tty);
if (!signal_pending(current))
- retval = 0;
-out:
- unlock_kernel();
- return retval;
+ return -EINTR;
+ return 0;
}
/**
- * tiocmget - get modem status
+ * tty_tiocmget - get modem status
* @tty: tty device
* @file: user file pointer
* @p: pointer to result
{
int retval = -EINVAL;
- if (tty->driver->tiocmget) {
- lock_kernel();
- retval = tty->driver->tiocmget(tty, file);
- unlock_kernel();
+ if (tty->ops->tiocmget) {
+ retval = tty->ops->tiocmget(tty, file);
if (retval >= 0)
retval = put_user(retval, p);
}
/**
- * tiocmset - set modem status
+ * tty_tiocmset - set modem status
* @tty: tty device
* @file: user file pointer
* @cmd: command - clear bits, set bits or set all
{
int retval = -EINVAL;
- if (tty->driver->tiocmset) {
+ if (tty->ops->tiocmset) {
unsigned int set, clear, val;
retval = get_user(val, p);
set &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
clear &= TIOCM_DTR|TIOCM_RTS|TIOCM_OUT1|TIOCM_OUT2|TIOCM_LOOP;
- lock_kernel();
- retval = tty->driver->tiocmset(tty, file, set, clear);
- unlock_kernel();
+ retval = tty->ops->tiocmset(tty, file, set, clear);
}
return retval;
}
retval = -EINVAL;
- if (!tty->driver->break_ctl) {
+ if (!tty->ops->break_ctl) {
switch (cmd) {
case TIOCSBRK:
case TIOCCBRK:
- if (tty->driver->ioctl)
- retval = tty->driver->ioctl(tty, file, cmd, arg);
+ if (tty->ops->ioctl)
+ retval = tty->ops->ioctl(tty, file, cmd, arg);
+ if (retval != -EINVAL && retval != -ENOIOCTLCMD)
+ printk(KERN_WARNING "tty: driver %s needs updating to use break_ctl\n", tty->driver->name);
return retval;
/* These two ioctl's always return success; even if */
/* the driver doesn't support them. */
case TCSBRK:
case TCSBRKP:
- if (!tty->driver->ioctl)
+ if (!tty->ops->ioctl)
return 0;
- lock_kernel();
- retval = tty->driver->ioctl(tty, file, cmd, arg);
- unlock_kernel();
+ retval = tty->ops->ioctl(tty, file, cmd, arg);
+ if (retval != -EINVAL && retval != -ENOIOCTLCMD)
+ printk(KERN_WARNING "tty: driver %s needs updating to use break_ctl\n", tty->driver->name);
if (retval == -ENOIOCTLCMD)
retval = 0;
return retval;
if (retval)
return retval;
if (cmd != TIOCCBRK) {
- lock_kernel();
tty_wait_until_sent(tty, 0);
- unlock_kernel();
if (signal_pending(current))
return -EINTR;
}
case TIOCGSID:
return tiocgsid(tty, real_tty, p);
case TIOCGETD:
- /* FIXME: check this is ok */
return put_user(tty->ldisc.num, (int __user *)p);
case TIOCSETD:
return tiocsetd(tty, p);
* Break handling
*/
case TIOCSBRK: /* Turn break on, unconditionally */
- lock_kernel();
- tty->driver->break_ctl(tty, -1);
- unlock_kernel();
+ if (tty->ops->break_ctl)
+ tty->ops->break_ctl(tty, -1);
return 0;
case TIOCCBRK: /* Turn break off, unconditionally */
- lock_kernel();
- tty->driver->break_ctl(tty, 0);
- unlock_kernel();
+ if (tty->ops->break_ctl)
+ tty->ops->break_ctl(tty, 0);
return 0;
case TCSBRK: /* SVID version: non-zero arg --> no break */
/* non-zero arg means wait for all output data
}
break;
}
- if (tty->driver->ioctl) {
- retval = (tty->driver->ioctl)(tty, file, cmd, arg);
+ if (tty->ops->ioctl) {
+ retval = (tty->ops->ioctl)(tty, file, cmd, arg);
if (retval != -ENOIOCTLCMD)
return retval;
}
if (tty_paranoia_check(tty, inode, "tty_ioctl"))
return -EINVAL;
- if (tty->driver->compat_ioctl) {
- retval = (tty->driver->compat_ioctl)(tty, file, cmd, arg);
+ if (tty->ops->compat_ioctl) {
+ retval = (tty->ops->compat_ioctl)(tty, file, cmd, arg);
if (retval != -ENOIOCTLCMD)
return retval;
}
tty_ldisc_flush(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
read_lock(&tasklist_lock);
/* Kill the entire session */
INIT_WORK(&tty->SAK_work, do_SAK_work);
}
-/*
- * The default put_char routine if the driver did not define one.
+/**
+ * tty_put_char - write one character to a tty
+ * @tty: tty
+ * @ch: character
+ *
+ * Write one byte to the tty using the provided put_char method
+ * if present. Returns the number of characters successfully output.
+ *
+ * Note: the specific put_char operation in the driver layer may go
+ * away soon. Don't call it directly, use this method
*/
-static void tty_default_put_char(struct tty_struct *tty, unsigned char ch)
+int tty_put_char(struct tty_struct *tty, unsigned char ch)
{
- tty->driver->write(tty, &ch, 1);
+ if (tty->ops->put_char)
+ return tty->ops->put_char(tty, ch);
+ return tty->ops->write(tty, &ch, 1);
}
+EXPORT_SYMBOL_GPL(tty_put_char);
+
static struct class *tty_class;
/**
void tty_set_operations(struct tty_driver *driver,
const struct tty_operations *op)
{
- driver->open = op->open;
- driver->close = op->close;
- driver->write = op->write;
- driver->put_char = op->put_char;
- driver->flush_chars = op->flush_chars;
- driver->write_room = op->write_room;
- driver->chars_in_buffer = op->chars_in_buffer;
- driver->ioctl = op->ioctl;
- driver->compat_ioctl = op->compat_ioctl;
- driver->set_termios = op->set_termios;
- driver->throttle = op->throttle;
- driver->unthrottle = op->unthrottle;
- driver->stop = op->stop;
- driver->start = op->start;
- driver->hangup = op->hangup;
- driver->break_ctl = op->break_ctl;
- driver->flush_buffer = op->flush_buffer;
- driver->set_ldisc = op->set_ldisc;
- driver->wait_until_sent = op->wait_until_sent;
- driver->send_xchar = op->send_xchar;
- driver->read_proc = op->read_proc;
- driver->write_proc = op->write_proc;
- driver->tiocmget = op->tiocmget;
- driver->tiocmset = op->tiocmset;
-#ifdef CONFIG_CONSOLE_POLL
- driver->poll_init = op->poll_init;
- driver->poll_get_char = op->poll_get_char;
- driver->poll_put_char = op->poll_put_char;
-#endif
-}
-
+ driver->ops = op;
+};
EXPORT_SYMBOL(alloc_tty_driver);
EXPORT_SYMBOL(put_tty_driver);
return error;
}
- if (!driver->put_char)
- driver->put_char = tty_default_put_char;
-
mutex_lock(&tty_mutex);
list_add(&driver->tty_drivers, &tty_drivers);
mutex_unlock(&tty_mutex);
#define TERMIOS_OLD 8
+int tty_chars_in_buffer(struct tty_struct *tty)
+{
+ if (tty->ops->chars_in_buffer)
+ return tty->ops->chars_in_buffer(tty);
+ else
+ return 0;
+}
+
+EXPORT_SYMBOL(tty_chars_in_buffer);
+
+int tty_write_room(struct tty_struct *tty)
+{
+ if (tty->ops->write_room)
+ return tty->ops->write_room(tty);
+ return 2048;
+}
+
+EXPORT_SYMBOL(tty_write_room);
+
+void tty_driver_flush_buffer(struct tty_struct *tty)
+{
+ if (tty->ops->flush_buffer)
+ tty->ops->flush_buffer(tty);
+}
+
+EXPORT_SYMBOL(tty_driver_flush_buffer);
+
+
/**
* tty_wait_until_sent - wait for I/O to finish
* @tty: tty we are waiting for
printk(KERN_DEBUG "%s wait until sent...\n", tty_name(tty, buf));
#endif
- if (!tty->driver->chars_in_buffer)
- return;
if (!timeout)
timeout = MAX_SCHEDULE_TIMEOUT;
- lock_kernel();
if (wait_event_interruptible_timeout(tty->write_wait,
- !tty->driver->chars_in_buffer(tty), timeout) >= 0) {
- if (tty->driver->wait_until_sent)
- tty->driver->wait_until_sent(tty, timeout);
+ !tty_chars_in_buffer(tty), timeout) >= 0) {
+ if (tty->ops->wait_until_sent)
+ tty->ops->wait_until_sent(tty, timeout);
}
- unlock_kernel();
}
EXPORT_SYMBOL(tty_wait_until_sent);
}
}
- if (tty->driver->set_termios)
- (*tty->driver->set_termios)(tty, &old_termios);
+ if (tty->ops->set_termios)
+ (*tty->ops->set_termios)(tty, &old_termios);
else
tty_termios_copy_hw(tty->termios, &old_termios);
{
int was_stopped = tty->stopped;
- if (tty->driver->send_xchar) {
- tty->driver->send_xchar(tty, ch);
+ if (tty->ops->send_xchar) {
+ tty->ops->send_xchar(tty, ch);
return 0;
}
if (was_stopped)
start_tty(tty);
- tty->driver->write(tty, &ch, 1);
+ tty->ops->write(tty, &ch, 1);
if (was_stopped)
stop_tty(tty);
tty_write_unlock(tty);
{
int ret = 0;
int bit = arg ? CLOCAL : 0;
- struct ktermios old = *tty->termios;
+ struct ktermios old;
mutex_lock(&tty->termios_mutex);
+ old = *tty->termios;
tty->termios->c_cflag &= ~CLOCAL;
tty->termios->c_cflag |= bit;
- if (tty->driver->set_termios)
- tty->driver->set_termios(tty, &old);
+ if (tty->ops->set_termios)
+ tty->ops->set_termios(tty, &old);
if ((tty->termios->c_cflag & CLOCAL) != bit)
ret = -EINVAL;
mutex_unlock(&tty->termios_mutex);
ld->flush_buffer(tty);
/* fall through */
case TCOFLUSH:
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
break;
default:
tty_ldisc_deref(ld);
case TCFLSH:
return tty_perform_flush(tty, arg);
case TIOCOUTQ:
- return put_user(tty->driver->chars_in_buffer ?
- tty->driver->chars_in_buffer(tty) : 0,
- (int __user *) arg);
+ return put_user(tty_chars_in_buffer(tty), (int __user *) arg);
case TIOCINQ:
retval = tty->read_cnt;
if (L_ICANON(tty))
static int serport_serio_write(struct serio *serio, unsigned char data)
{
struct serport *serport = serio->port_data;
- return -(serport->tty->driver->write(serport->tty, &data, 1) != 1);
+ return -(serport->tty->ops->write(serport->tty, &data, 1) != 1);
}
static int serport_serio_open(struct serio *serio)
struct tty_struct *tty = cs->hw.ser->tty;
struct bc_state *bcs = &cs->bcs[0]; /* only one channel */
struct sk_buff *skb = bcs->tx_skb;
- int sent;
+ int sent = -EOPNOTSUPP;
if (!tty || !tty->driver || !skb)
- return -EFAULT;
+ return -EINVAL;
if (!skb->len) {
dev_kfree_skb_any(skb);
}
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sent = tty->driver->write(tty, skb->data, skb->len);
+ if (tty->ops->write)
+ sent = tty->ops->write(tty, skb->data, skb->len);
gig_dbg(DEBUG_OUTPUT, "write_modem: sent %d", sent);
if (sent < 0) {
/* error */
if (cb->len) {
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sent = tty->driver->write(tty, cb->buf + cb->offset, cb->len);
+ sent = tty->ops->write(tty, cb->buf + cb->offset, cb->len);
if (sent < 0) {
/* error */
gig_dbg(DEBUG_OUTPUT, "send_cb: write error %d", sent);
struct tty_struct *tty = cs->hw.ser->tty;
unsigned int set, clear;
- if (!tty || !tty->driver || !tty->driver->tiocmset)
- return -EFAULT;
+ if (!tty || !tty->driver || !tty->ops->tiocmset)
+ return -EINVAL;
set = new_state & ~old_state;
clear = old_state & ~new_state;
if (!set && !clear)
return 0;
gig_dbg(DEBUG_IF, "tiocmset set %x clear %x", set, clear);
- return tty->driver->tiocmset(tty, NULL, set, clear);
+ return tty->ops->tiocmset(tty, NULL, set, clear);
}
static int gigaset_baud_rate(struct cardstate *cs, unsigned cflag)
if (((sp->status1 & SIXP_DCD_MASK) == 0) && (random < sp->persistence)) {
sp->led_state = 0x70;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
- actual = sp->tty->driver->write(sp->tty, sp->xbuff, sp->status2);
+ actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
sp->xleft -= actual;
sp->xhead += actual;
sp->led_state = 0x60;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->status2 = 0;
} else
mod_timer(&sp->tx_t, jiffies + ((when + 1) * HZ) / 100);
*/
if (sp->duplex == 1) {
sp->led_state = 0x70;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
- actual = sp->tty->driver->write(sp->tty, sp->xbuff, count);
+ actual = sp->tty->ops->write(sp->tty, sp->xbuff, count);
sp->xleft = count - actual;
sp->xhead = sp->xbuff + actual;
sp->led_state = 0x60;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
} else {
sp->xleft = count;
sp->xhead = sp->xbuff;
}
if (sp->tx_enable) {
- actual = tty->driver->write(tty, sp->xhead, sp->xleft);
+ actual = tty->ops->write(tty, sp->xhead, sp->xleft);
sp->xleft -= actual;
sp->xhead += actual;
}
sp_put(sp);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags)
- && tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ && tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
/*
/* resync the TNC */
sp->led_state = 0x60;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
- sp->tty->driver->write(sp->tty, &resync_cmd, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &resync_cmd, 1);
/* Start resync timer again -- the TNC might be still absent */
tnc_set_sync_state(sp, TNC_UNSYNC_STARTUP);
- sp->tty->driver->write(sp->tty, &inbyte, 1);
+ sp->tty->ops->write(sp->tty, &inbyte, 1);
del_timer(&sp->resync_t);
sp->resync_t.data = (unsigned long) sp;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
dev = alloc_netdev(sizeof(struct sixpack), "sp%d", sp_setup);
if (!dev) {
} else { /* output watchdog char if idle */
if ((sp->status2 != 0) && (sp->duplex == 1)) {
sp->led_state = 0x70;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
sp->tx_enable = 1;
- actual = sp->tty->driver->write(sp->tty, sp->xbuff, sp->status2);
+ actual = sp->tty->ops->write(sp->tty, sp->xbuff, sp->status2);
sp->xleft -= actual;
sp->xhead += actual;
sp->led_state = 0x60;
}
/* needed to trigger the TNC watchdog */
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
/* if the state byte has been received, the TNC is present,
so the resync timer can be reset. */
if ((sp->status & SIXP_RX_DCD_MASK) ==
SIXP_RX_DCD_MASK) {
sp->led_state = 0x68;
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
}
} else {
sp->led_state = 0x60;
/* fill trailing bytes with zeroes */
- sp->tty->driver->write(sp->tty, &sp->led_state, 1);
+ sp->tty->ops->write(sp->tty, &sp->led_state, 1);
rest = sp->rx_count;
if (rest != 0)
for (i = rest; i <= 3; i++)
spin_unlock_bh(&ax->buflock);
set_bit(TTY_DO_WRITE_WAKEUP, &ax->tty->flags);
- actual = ax->tty->driver->write(ax->tty, ax->xbuff, count);
+ actual = ax->tty->ops->write(ax->tty, ax->xbuff, count);
ax->stats.tx_packets++;
ax->stats.tx_bytes += actual;
}
printk(KERN_ERR "mkiss: %s: transmit timed out, %s?\n", dev->name,
- (ax->tty->driver->chars_in_buffer(ax->tty) || ax->xleft) ?
+ (ax->tty->ops->chars_in_buffer(ax->tty) || ax->xleft) ?
"bad line quality" : "driver error");
ax->xleft = 0;
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
dev = alloc_netdev(sizeof(struct mkiss), "ax%d", ax_setup);
if (!dev) {
tty->disc_data = ax;
tty->receive_room = 65535;
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
/* Restore default settings */
dev->type = ARPHRD_AX25;
mkiss_put(ax);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags)
- && tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ && tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
/*
goto out;
}
- actual = tty->driver->write(tty, ax->xhead, ax->xleft);
+ actual = tty->ops->write(tty, ax->xhead, ax->xleft);
ax->xleft -= actual;
ax->xhead += actual;
IRDA_ASSERT(priv != NULL, return -1;);
IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
- return priv->tty->driver->chars_in_buffer(priv->tty);
+ return tty_chars_in_buffer(priv->tty);
}
/* Wait (sleep) until underlaying hardware finished transmission
IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return;);
tty = priv->tty;
- if (tty->driver->wait_until_sent) {
- lock_kernel();
- tty->driver->wait_until_sent(tty, msecs_to_jiffies(100));
- unlock_kernel();
+ if (tty->ops->wait_until_sent) {
+ tty->ops->wait_until_sent(tty, msecs_to_jiffies(100));
}
else {
msleep(USBSERIAL_TX_DONE_DELAY);
tty = priv->tty;
- lock_kernel();
+ mutex_lock(&tty->termios_mutex);
old_termios = *(tty->termios);
cflag = tty->termios->c_cflag;
-
- cflag &= ~CBAUD;
-
- IRDA_DEBUG(2, "%s(), Setting speed to %d\n", __FUNCTION__, speed);
-
- switch (speed) {
- case 1200:
- cflag |= B1200;
- break;
- case 2400:
- cflag |= B2400;
- break;
- case 4800:
- cflag |= B4800;
- break;
- case 19200:
- cflag |= B19200;
- break;
- case 38400:
- cflag |= B38400;
- break;
- case 57600:
- cflag |= B57600;
- break;
- case 115200:
- cflag |= B115200;
- break;
- case 9600:
- default:
- cflag |= B9600;
- break;
- }
-
- tty->termios->c_cflag = cflag;
- if (tty->driver->set_termios)
- tty->driver->set_termios(tty, &old_termios);
- unlock_kernel();
-
+ tty_encode_baud_rate(tty, speed, speed);
+ if (tty->ops->set_termios)
+ tty->ops->set_termios(tty, &old_termios);
priv->io.speed = speed;
+ mutex_unlock(&tty->termios_mutex);
return 0;
}
* This function is not yet defined for all tty driver, so
* let's be careful... Jean II
*/
- IRDA_ASSERT(priv->tty->driver->tiocmset != NULL, return -1;);
- priv->tty->driver->tiocmset(priv->tty, NULL, set, clear);
+ IRDA_ASSERT(priv->tty->ops->tiocmset != NULL, return -1;);
+ priv->tty->ops->tiocmset(priv->tty, NULL, set, clear);
return 0;
}
IRDA_ASSERT(priv->magic == IRTTY_MAGIC, return -1;);
tty = priv->tty;
- if (!tty->driver->write)
+ if (!tty->ops->write)
return 0;
tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
- if (tty->driver->write_room) {
- writelen = tty->driver->write_room(tty);
- if (writelen > len)
- writelen = len;
- }
- else
+ writelen = tty_write_room(tty);
+ if (writelen > len)
writelen = len;
- return tty->driver->write(tty, ptr, writelen);
+ return tty->ops->write(tty, ptr, writelen);
}
/* ------------------------------------------------------- */
struct ktermios old_termios;
int cflag;
- lock_kernel();
+ mutex_lock(&tty->termios_mutex);
old_termios = *(tty->termios);
cflag = tty->termios->c_cflag;
cflag |= CREAD;
tty->termios->c_cflag = cflag;
- if (tty->driver->set_termios)
- tty->driver->set_termios(tty, &old_termios);
- unlock_kernel();
+ if (tty->ops->set_termios)
+ tty->ops->set_termios(tty, &old_termios);
+ mutex_unlock(&tty->termios_mutex);
}
/*****************************************************************/
tty = priv->tty;
- if (tty->driver->start)
- tty->driver->start(tty);
+ if (tty->ops->start)
+ tty->ops->start(tty);
/* Make sure we can receive more data */
irtty_stop_receiver(tty, FALSE);
/* Make sure we don't receive more data */
irtty_stop_receiver(tty, TRUE);
- if (tty->driver->stop)
- tty->driver->stop(tty);
+ if (tty->ops->stop)
+ tty->ops->stop(tty);
mutex_unlock(&irtty_mutex);
/* stop the underlying driver */
irtty_stop_receiver(tty, TRUE);
- if (tty->driver->stop)
- tty->driver->stop(tty);
+ if (tty->ops->stop)
+ tty->ops->stop(tty);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
/* apply mtt override */
sir_tty_drv.qos_mtt_bits = qos_mtt_bits;
/* Stop tty */
irtty_stop_receiver(tty, TRUE);
tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
- if (tty->driver->stop)
- tty->driver->stop(tty);
+ if (tty->ops->stop)
+ tty->ops->stop(tty);
kfree(priv);
struct asyncppp *ap;
int err;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
+
err = -ENOMEM;
ap = kzalloc(sizeof(*ap), GFP_KERNEL);
if (!ap)
tasklet_schedule(&ap->tsk);
ap_put(ap);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags)
- && tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ && tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
static void
if (!tty_stuffed && ap->optr < ap->olim) {
avail = ap->olim - ap->optr;
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sent = tty->driver->write(tty, ap->optr, avail);
+ sent = tty->ops->write(tty, ap->optr, avail);
if (sent < 0)
goto flush; /* error, e.g. loss of CD */
ap->optr += sent;
struct syncppp *ap;
int err;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
+
ap = kzalloc(sizeof(*ap), GFP_KERNEL);
err = -ENOMEM;
if (!ap)
tasklet_schedule(&ap->tsk);
sp_put(ap);
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags)
- && tty->driver->unthrottle)
- tty->driver->unthrottle(tty);
+ && tty->ops->unthrottle)
+ tty->ops->unthrottle(tty);
}
static void
tty_stuffed = 0;
if (!tty_stuffed && ap->tpkt) {
set_bit(TTY_DO_WRITE_WAKEUP, &tty->flags);
- sent = tty->driver->write(tty, ap->tpkt->data, ap->tpkt->len);
+ sent = tty->ops->write(tty, ap->tpkt->data, ap->tpkt->len);
if (sent < 0)
goto flush; /* error, e.g. loss of CD */
if (sent < ap->tpkt->len) {
/* Order of next two lines is *very* important.
* When we are sending a little amount of data,
- * the transfer may be completed inside driver.write()
+ * the transfer may be completed inside the ops->write()
* routine, because it's running with interrupts enabled.
* In this case we *never* got WRITE_WAKEUP event,
* if we did not request it before write operation.
* 14 Oct 1994 Dmitry Gorodchanin.
*/
sl->tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
- actual = sl->tty->driver->write(sl->tty, sl->xbuff, count);
+ actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
#ifdef SL_CHECK_TRANSMIT
sl->dev->trans_start = jiffies;
#endif
return;
}
- actual = tty->driver->write(tty, sl->xhead, sl->xleft);
+ actual = tty->ops->write(tty, sl->xhead, sl->xleft);
sl->xleft -= actual;
sl->xhead += actual;
}
}
printk(KERN_WARNING "%s: transmit timed out, %s?\n",
dev->name,
- (sl->tty->driver->chars_in_buffer(sl->tty) || sl->xleft) ?
+ (tty_chars_in_buffer(sl->tty) || sl->xleft) ?
"bad line quality" : "driver error");
sl->xleft = 0;
sl->tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
if (!capable(CAP_NET_ADMIN))
return -EPERM;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
+
/* RTnetlink lock is misused here to serialize concurrent
opens of slip channels. There are better ways, but it is
the simplest one.
/* put END into tty queue. Is it right ??? */
if (!netif_queue_stopped(sl->dev)) {
/* if device busy no outfill */
- sl->tty->driver->write(sl->tty, &s, 1);
+ sl->tty->ops->write(sl->tty, &s, 1);
}
} else
set_bit(SLF_OUTWAIT, &sl->flags);
#include <linux/module.h>
#include <asm/system.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <linux/bitops.h>
#include <linux/string.h>
#include <linux/mm.h>
x25_asy_devs[i] = dev;
return sl;
} else {
- printk("x25_asy_alloc() - register_netdev() failure.\n");
+ printk(KERN_WARNING "x25_asy_alloc() - register_netdev() failure.\n");
free_netdev(dev);
}
}
kfree(sl->xbuff);
sl->xbuff = NULL;
- if (!test_and_clear_bit(SLF_INUSE, &sl->flags)) {
- printk("%s: x25_asy_free for already free unit.\n", sl->dev->name);
- }
+ if (!test_and_clear_bit(SLF_INUSE, &sl->flags))
+ printk(KERN_ERR "%s: x25_asy_free for already free unit.\n",
+ sl->dev->name);
}
static int x25_asy_change_mtu(struct net_device *dev, int newmtu)
{
struct x25_asy *sl = dev->priv;
unsigned char *xbuff, *rbuff;
- int len = 2* newmtu;
+ int len = 2 * newmtu;
xbuff = kmalloc(len + 4, GFP_ATOMIC);
rbuff = kmalloc(len + 4, GFP_ATOMIC);
- if (xbuff == NULL || rbuff == NULL)
- {
- printk("%s: unable to grow X.25 buffers, MTU change cancelled.\n",
+ if (xbuff == NULL || rbuff == NULL) {
+ printk(KERN_WARNING "%s: unable to grow X.25 buffers, MTU change cancelled.\n",
dev->name);
kfree(xbuff);
kfree(rbuff);
int err;
count = sl->rcount;
- sl->stats.rx_bytes+=count;
-
+ sl->stats.rx_bytes += count;
+
skb = dev_alloc_skb(count+1);
- if (skb == NULL)
- {
- printk("%s: memory squeeze, dropping packet.\n", sl->dev->name);
+ if (skb == NULL) {
+ printk(KERN_WARNING "%s: memory squeeze, dropping packet.\n",
+ sl->dev->name);
sl->stats.rx_dropped++;
return;
}
- skb_push(skb,1); /* LAPB internal control */
- memcpy(skb_put(skb,count), sl->rbuff, count);
+ skb_push(skb, 1); /* LAPB internal control */
+ memcpy(skb_put(skb, count), sl->rbuff, count);
skb->protocol = x25_type_trans(skb, sl->dev);
- if((err=lapb_data_received(skb->dev, skb))!=LAPB_OK)
- {
+ err = lapb_data_received(skb->dev, skb);
+ if (err != LAPB_OK) {
kfree_skb(skb);
- printk(KERN_DEBUG "x25_asy: data received err - %d\n",err);
- }
- else
- {
+ printk(KERN_DEBUG "x25_asy: data received err - %d\n", err);
+ } else {
netif_rx(skb);
sl->dev->last_rx = jiffies;
sl->stats.rx_packets++;
unsigned char *p;
int actual, count, mtu = sl->dev->mtu;
- if (len > mtu)
- { /* Sigh, shouldn't occur BUT ... */
+ if (len > mtu) {
+ /* Sigh, shouldn't occur BUT ... */
len = mtu;
- printk ("%s: truncating oversized transmit packet!\n", sl->dev->name);
+ printk(KERN_DEBUG "%s: truncating oversized transmit packet!\n",
+ sl->dev->name);
sl->stats.tx_dropped++;
x25_asy_unlock(sl);
return;
* 14 Oct 1994 Dmitry Gorodchanin.
*/
sl->tty->flags |= (1 << TTY_DO_WRITE_WAKEUP);
- actual = sl->tty->driver->write(sl->tty, sl->xbuff, count);
+ actual = sl->tty->ops->write(sl->tty, sl->xbuff, count);
sl->xleft = count - actual;
sl->xhead = sl->xbuff + actual;
/* VSV */
if (!sl || sl->magic != X25_ASY_MAGIC || !netif_running(sl->dev))
return;
- if (sl->xleft <= 0)
- {
+ if (sl->xleft <= 0) {
/* Now serial buffer is almost free & we can start
* transmission of another packet */
sl->stats.tx_packets++;
return;
}
- actual = tty->driver->write(tty, sl->xhead, sl->xleft);
+ actual = tty->ops->write(tty, sl->xhead, sl->xleft);
sl->xleft -= actual;
sl->xhead += actual;
}
static void x25_asy_timeout(struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
+ struct x25_asy *sl = dev->priv;
spin_lock(&sl->lock);
if (netif_queue_stopped(dev)) {
* 14 Oct 1994 Dmitry Gorodchanin.
*/
printk(KERN_WARNING "%s: transmit timed out, %s?\n", dev->name,
- (sl->tty->driver->chars_in_buffer(sl->tty) || sl->xleft) ?
+ (tty_chars_in_buffer(sl->tty) || sl->xleft) ?
"bad line quality" : "driver error");
sl->xleft = 0;
sl->tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
static int x25_asy_xmit(struct sk_buff *skb, struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
+ struct x25_asy *sl = dev->priv;
int err;
if (!netif_running(sl->dev)) {
- printk("%s: xmit call when iface is down\n", dev->name);
+ printk(KERN_ERR "%s: xmit call when iface is down\n",
+ dev->name);
kfree_skb(skb);
return 0;
}
-
- switch(skb->data[0])
- {
- case 0x00:break;
- case 0x01: /* Connection request .. do nothing */
- if((err=lapb_connect_request(dev))!=LAPB_OK)
- printk(KERN_ERR "x25_asy: lapb_connect_request error - %d\n", err);
- kfree_skb(skb);
- return 0;
- case 0x02: /* Disconnect request .. do nothing - hang up ?? */
- if((err=lapb_disconnect_request(dev))!=LAPB_OK)
- printk(KERN_ERR "x25_asy: lapb_disconnect_request error - %d\n", err);
- default:
- kfree_skb(skb);
- return 0;
+
+ switch (skb->data[0]) {
+ case 0x00:
+ break;
+ case 0x01: /* Connection request .. do nothing */
+ err = lapb_connect_request(dev);
+ if (err != LAPB_OK)
+ printk(KERN_ERR "x25_asy: lapb_connect_request error - %d\n", err);
+ kfree_skb(skb);
+ return 0;
+ case 0x02: /* Disconnect request .. do nothing - hang up ?? */
+ err = lapb_disconnect_request(dev);
+ if (err != LAPB_OK)
+ printk(KERN_ERR "x25_asy: lapb_disconnect_request error - %d\n", err);
+ default:
+ kfree_skb(skb);
+ return 0;
}
- skb_pull(skb,1); /* Remove control byte */
+ skb_pull(skb, 1); /* Remove control byte */
/*
* If we are busy already- too bad. We ought to be able
* to queue things at this point, to allow for a little
* So, no queues !
* 14 Oct 1994 Dmitry Gorodchanin.
*/
-
- if((err=lapb_data_request(dev,skb))!=LAPB_OK)
- {
- printk(KERN_ERR "lapbeth: lapb_data_request error - %d\n", err);
+
+ err = lapb_data_request(dev, skb);
+ if (err != LAPB_OK) {
+ printk(KERN_ERR "x25_asy: lapb_data_request error - %d\n", err);
kfree_skb(skb);
return 0;
}
* Called when I frame data arrives. We did the work above - throw it
* at the net layer.
*/
-
+
static int x25_asy_data_indication(struct net_device *dev, struct sk_buff *skb)
{
skb->dev->last_rx = jiffies;
* busy cases too well. Its tricky to see how to do this nicely -
* perhaps lapb should allow us to bounce this ?
*/
-
+
static void x25_asy_data_transmit(struct net_device *dev, struct sk_buff *skb)
{
- struct x25_asy *sl=dev->priv;
-
+ struct x25_asy *sl = dev->priv;
+
spin_lock(&sl->lock);
- if (netif_queue_stopped(sl->dev) || sl->tty == NULL)
- {
+ if (netif_queue_stopped(sl->dev) || sl->tty == NULL) {
spin_unlock(&sl->lock);
printk(KERN_ERR "x25_asy: tbusy drop\n");
kfree_skb(skb);
return;
}
/* We were not busy, so we are now... :-) */
- if (skb != NULL)
- {
+ if (skb != NULL) {
x25_asy_lock(sl);
- sl->stats.tx_bytes+=skb->len;
+ sl->stats.tx_bytes += skb->len;
x25_asy_encaps(sl, skb->data, skb->len);
dev_kfree_skb(skb);
}
/*
* LAPB connection establish/down information.
*/
-
+
static void x25_asy_connected(struct net_device *dev, int reason)
{
struct x25_asy *sl = dev->priv;
struct sk_buff *skb;
unsigned char *ptr;
- if ((skb = dev_alloc_skb(1)) == NULL) {
- printk(KERN_ERR "lapbeth: out of memory\n");
+ skb = dev_alloc_skb(1);
+ if (skb == NULL) {
+ printk(KERN_ERR "x25_asy: out of memory\n");
return;
}
struct sk_buff *skb;
unsigned char *ptr;
- if ((skb = dev_alloc_skb(1)) == NULL) {
+ skb = dev_alloc_skb(1);
+ if (skb == NULL) {
printk(KERN_ERR "x25_asy: out of memory\n");
return;
}
/* Open the low-level part of the X.25 channel. Easy! */
static int x25_asy_open(struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
+ struct x25_asy *sl = dev->priv;
unsigned long len;
int err;
len = dev->mtu * 2;
sl->rbuff = kmalloc(len + 4, GFP_KERNEL);
- if (sl->rbuff == NULL) {
+ if (sl->rbuff == NULL)
goto norbuff;
- }
sl->xbuff = kmalloc(len + 4, GFP_KERNEL);
- if (sl->xbuff == NULL) {
+ if (sl->xbuff == NULL)
goto noxbuff;
- }
sl->buffsize = len;
sl->rcount = 0;
sl->flags &= (1 << SLF_INUSE); /* Clear ESCAPE & ERROR flags */
netif_start_queue(dev);
-
+
/*
* Now attach LAPB
*/
- if((err=lapb_register(dev, &x25_asy_callbacks))==LAPB_OK)
+ err = lapb_register(dev, &x25_asy_callbacks);
+ if (err == LAPB_OK)
return 0;
/* Cleanup */
/* Close the low-level part of the X.25 channel. Easy! */
static int x25_asy_close(struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
+ struct x25_asy *sl = dev->priv;
int err;
spin_lock(&sl->lock);
- if (sl->tty)
+ if (sl->tty)
sl->tty->flags &= ~(1 << TTY_DO_WRITE_WAKEUP);
netif_stop_queue(dev);
sl->rcount = 0;
sl->xleft = 0;
- if((err=lapb_unregister(dev))!=LAPB_OK)
- printk(KERN_ERR "x25_asy_close: lapb_unregister error -%d\n",err);
+ err = lapb_unregister(dev);
+ if (err != LAPB_OK)
+ printk(KERN_ERR "x25_asy_close: lapb_unregister error -%d\n",
+ err);
spin_unlock(&sl->lock);
return 0;
}
* a block of X.25 data has been received, which can now be decapsulated
* and sent on to some IP layer for further processing.
*/
-
-static void x25_asy_receive_buf(struct tty_struct *tty, const unsigned char *cp, char *fp, int count)
+
+static void x25_asy_receive_buf(struct tty_struct *tty,
+ const unsigned char *cp, char *fp, int count)
{
struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
/* Read the characters out of the buffer */
while (count--) {
if (fp && *fp++) {
- if (!test_and_set_bit(SLF_ERROR, &sl->flags)) {
+ if (!test_and_set_bit(SLF_ERROR, &sl->flags))
sl->stats.rx_errors++;
- }
cp++;
continue;
}
struct x25_asy *sl = (struct x25_asy *) tty->disc_data;
int err;
+ if (tty->ops->write == NULL)
+ return -EOPNOTSUPP;
+
/* First make sure we're not already connected. */
- if (sl && sl->magic == X25_ASY_MAGIC) {
+ if (sl && sl->magic == X25_ASY_MAGIC)
return -EEXIST;
- }
/* OK. Find a free X.25 channel to use. */
- if ((sl = x25_asy_alloc()) == NULL) {
+ sl = x25_asy_alloc();
+ if (sl == NULL)
return -ENFILE;
- }
sl->tty = tty;
tty->disc_data = sl;
tty->receive_room = 65536;
- if (tty->driver->flush_buffer) {
- tty->driver->flush_buffer(tty);
- }
+ tty_driver_flush_buffer(tty);
tty_ldisc_flush(tty);
/* Restore default settings */
sl->dev->type = ARPHRD_X25;
-
+
/* Perform the low-level X.25 async init */
- if ((err = x25_asy_open(sl->dev)))
+ err = x25_asy_open(sl->dev);
+ if (err)
return err;
-
/* Done. We have linked the TTY line to a channel. */
return sl->dev->base_addr;
}
return;
if (sl->dev->flags & IFF_UP)
- {
- (void) dev_close(sl->dev);
- }
+ dev_close(sl->dev);
tty->disc_data = NULL;
sl->tty = NULL;
static struct net_device_stats *x25_asy_get_stats(struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
-
+ struct x25_asy *sl = dev->priv;
return &sl->stats;
}
* character sequence, according to the X.25 protocol.
*/
- while (len-- > 0)
- {
- switch(c = *s++)
- {
- case X25_END:
- *ptr++ = X25_ESC;
- *ptr++ = X25_ESCAPE(X25_END);
- break;
- case X25_ESC:
- *ptr++ = X25_ESC;
- *ptr++ = X25_ESCAPE(X25_ESC);
- break;
- default:
- *ptr++ = c;
- break;
+ while (len-- > 0) {
+ switch (c = *s++) {
+ case X25_END:
+ *ptr++ = X25_ESC;
+ *ptr++ = X25_ESCAPE(X25_END);
+ break;
+ case X25_ESC:
+ *ptr++ = X25_ESC;
+ *ptr++ = X25_ESCAPE(X25_ESC);
+ break;
+ default:
+ *ptr++ = c;
+ break;
}
}
*ptr++ = X25_END;
static void x25_asy_unesc(struct x25_asy *sl, unsigned char s)
{
- switch(s)
- {
- case X25_END:
- if (!test_and_clear_bit(SLF_ERROR, &sl->flags) && (sl->rcount > 2))
- {
- x25_asy_bump(sl);
- }
- clear_bit(SLF_ESCAPE, &sl->flags);
- sl->rcount = 0;
- return;
-
- case X25_ESC:
- set_bit(SLF_ESCAPE, &sl->flags);
- return;
-
- case X25_ESCAPE(X25_ESC):
- case X25_ESCAPE(X25_END):
- if (test_and_clear_bit(SLF_ESCAPE, &sl->flags))
- s = X25_UNESCAPE(s);
- break;
- }
- if (!test_bit(SLF_ERROR, &sl->flags))
- {
- if (sl->rcount < sl->buffsize)
- {
+ switch (s) {
+ case X25_END:
+ if (!test_and_clear_bit(SLF_ERROR, &sl->flags)
+ && sl->rcount > 2)
+ x25_asy_bump(sl);
+ clear_bit(SLF_ESCAPE, &sl->flags);
+ sl->rcount = 0;
+ return;
+ case X25_ESC:
+ set_bit(SLF_ESCAPE, &sl->flags);
+ return;
+ case X25_ESCAPE(X25_ESC):
+ case X25_ESCAPE(X25_END):
+ if (test_and_clear_bit(SLF_ESCAPE, &sl->flags))
+ s = X25_UNESCAPE(s);
+ break;
+ }
+ if (!test_bit(SLF_ERROR, &sl->flags)) {
+ if (sl->rcount < sl->buffsize) {
sl->rbuff[sl->rcount++] = s;
return;
}
if (!sl || sl->magic != X25_ASY_MAGIC)
return -EINVAL;
- switch(cmd) {
+ switch (cmd) {
case SIOCGIFNAME:
if (copy_to_user((void __user *)arg, sl->dev->name,
strlen(sl->dev->name) + 1))
static int x25_asy_open_dev(struct net_device *dev)
{
- struct x25_asy *sl = (struct x25_asy*)(dev->priv);
- if(sl->tty==NULL)
+ struct x25_asy *sl = dev->priv;
+ if (sl->tty == NULL)
return -ENODEV;
return 0;
}
set_bit(SLF_INUSE, &sl->flags);
/*
- * Finish setting up the DEVICE info.
+ * Finish setting up the DEVICE info.
*/
-
+
dev->mtu = SL_MTU;
dev->hard_start_xmit = x25_asy_xmit;
dev->tx_timeout = x25_asy_timeout;
x25_asy_maxdev = 4; /* Sanity */
printk(KERN_INFO "X.25 async: version 0.00 ALPHA "
- "(dynamic channels, max=%d).\n", x25_asy_maxdev );
+ "(dynamic channels, max=%d).\n", x25_asy_maxdev);
- x25_asy_devs = kcalloc(x25_asy_maxdev, sizeof(struct net_device*), GFP_KERNEL);
+ x25_asy_devs = kcalloc(x25_asy_maxdev, sizeof(struct net_device *),
+ GFP_KERNEL);
if (!x25_asy_devs) {
printk(KERN_WARNING "X25 async: Can't allocate x25_asy_ctrls[] "
"array! Uaargh! (-> No X.25 available)\n");
struct x25_asy *sl = dev->priv;
spin_lock_bh(&sl->lock);
- if (sl->tty)
+ if (sl->tty)
tty_hangup(sl->tty);
spin_unlock_bh(&sl->lock);
static int kgdboc_get_char(void)
{
- return kgdb_tty_driver->poll_get_char(kgdb_tty_driver, kgdb_tty_line);
+ return kgdb_tty_driver->ops->poll_get_char(kgdb_tty_driver,
+ kgdb_tty_line);
}
static void kgdboc_put_char(u8 chr)
{
- kgdb_tty_driver->poll_put_char(kgdb_tty_driver, kgdb_tty_line, chr);
+ kgdb_tty_driver->ops->poll_put_char(kgdb_tty_driver,
+ kgdb_tty_line, chr);
}
static int param_set_kgdboc_var(const char *kmessage, struct kernel_param *kp)
static int uart_write_room(struct tty_struct *tty)
{
struct uart_state *state = tty->driver_data;
+ unsigned long flags;
+ int ret;
- return uart_circ_chars_free(&state->info->xmit);
+ spin_lock_irqsave(&state->port->lock, flags);
+ ret = uart_circ_chars_free(&state->info->xmit);
+ spin_unlock_irqrestore(&state->port->lock, flags);
+ return ret;
}
static int uart_chars_in_buffer(struct tty_struct *tty)
{
struct uart_state *state = tty->driver_data;
+ unsigned long flags;
+ int ret;
- return uart_circ_chars_pending(&state->info->xmit);
+ spin_lock_irqsave(&state->port->lock, flags);
+ ret = uart_circ_chars_pending(&state->info->xmit);
+ spin_unlock_irqrestore(&state->port->lock, flags);
+ return ret;
}
static void uart_flush_buffer(struct tty_struct *tty)
struct serial_struct tmp;
memset(&tmp, 0, sizeof(tmp));
+
+ /* Ensure the state we copy is consistent and no hardware changes
+ occur as we go */
+ mutex_lock(&state->mutex);
+
tmp.type = port->type;
tmp.line = port->line;
tmp.port = port->iobase;
tmp.iomem_reg_shift = port->regshift;
tmp.iomem_base = (void *)(unsigned long)port->mapbase;
+ mutex_unlock(&state->mutex);
+
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
struct uart_state *state = tty->driver_data;
struct uart_port *port = state->port;
- lock_kernel();
mutex_lock(&state->mutex);
if (port->type != PORT_UNKNOWN)
port->ops->break_ctl(port, break_state);
mutex_unlock(&state->mutex);
- unlock_kernel();
}
static int uart_do_autoconfig(struct uart_state *state)
int ret = -ENOIOCTLCMD;
- lock_kernel();
/*
* These ioctls don't rely on the hardware to be present.
*/
break;
}
}
- out_up:
+out_up:
mutex_unlock(&state->mutex);
- out:
- unlock_kernel();
+out:
return ret;
}
return;
}
- lock_kernel();
uart_change_speed(state, old_termios);
/* Handle transition to B0 status */
}
spin_unlock_irqrestore(&state->port->lock, flags);
}
- unlock_kernel();
#if 0
/*
* No need to wake up processes in open wait, since they
struct uart_port *port = state->port;
unsigned long char_time, expire;
- BUG_ON(!kernel_locked());
-
if (port->type == PORT_UNKNOWN || port->fifosize == 0)
return;
+ lock_kernel();
+
/*
* Set the check interval to be 1/5 of the estimated time to
* send a single character, and make it at least 1. The check
break;
}
set_current_state(TASK_RUNNING); /* might not be needed */
+ unlock_kernel();
}
/*
int ret;
uart_change_pm(state, 0);
+ spin_lock_irq(&port->lock);
ops->set_mctrl(port, 0);
+ spin_unlock_irq(&port->lock);
ret = ops->startup(port);
if (ret == 0) {
uart_change_speed(state, NULL);
tty_wait_until_sent(tty, DIGI_CLOSE_TIMEOUT);
/* flush driver and line discipline buffers */
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
tty_ldisc_flush(tty);
if (port->serial->dev) {
struct usb_serial_port *port = tty->driver_data;
int retval = -ENODEV;
- if (!port || port->serial->dev->state == USB_STATE_NOTATTACHED)
+ if (port->serial->dev->state == USB_STATE_NOTATTACHED)
goto exit;
dbg("%s - port %d, %d byte(s)", __func__, port->number, count);
- if (!port->open_count) {
- retval = -EINVAL;
- dbg("%s - port not opened", __func__);
- goto exit;
- }
+ /* open_count is managed under the mutex lock for the tty so cannot
+ drop to zero until after the last close completes */
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function */
retval = port->serial->type->write(port, buf, count);
static int serial_write_room (struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
- int retval = -ENODEV;
-
- if (!port)
- goto exit;
-
dbg("%s - port %d", __func__, port->number);
-
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- goto exit;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function */
- retval = port->serial->type->write_room(port);
-
-exit:
- return retval;
+ return port->serial->type->write_room(port);
}
static int serial_chars_in_buffer (struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
- int retval = -ENODEV;
-
- if (!port)
- goto exit;
-
dbg("%s = port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- goto exit;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function */
- retval = port->serial->type->chars_in_buffer(port);
-
-exit:
- return retval;
+ return port->serial->type->chars_in_buffer(port);
}
static void serial_throttle (struct tty_struct * tty)
{
struct usb_serial_port *port = tty->driver_data;
-
- if (!port)
- return;
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg ("%s - port not open", __func__);
- return;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function */
if (port->serial->type->throttle)
port->serial->type->throttle(port);
static void serial_unthrottle (struct tty_struct * tty)
{
struct usb_serial_port *port = tty->driver_data;
-
- if (!port)
- return;
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- return;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function */
if (port->serial->type->unthrottle)
port->serial->type->unthrottle(port);
struct usb_serial_port *port = tty->driver_data;
int retval = -ENODEV;
- lock_kernel();
- if (!port)
- goto exit;
-
dbg("%s - port %d, cmd 0x%.4x", __func__, port->number, cmd);
- /* Caution - port->open_count is BKL protected */
- if (!port->open_count) {
- dbg ("%s - port not open", __func__);
- goto exit;
- }
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function if it is available */
- if (port->serial->type->ioctl)
+ if (port->serial->type->ioctl) {
+ lock_kernel();
retval = port->serial->type->ioctl(port, file, cmd, arg);
+ unlock_kernel();
+ }
else
retval = -ENOIOCTLCMD;
-exit:
- unlock_kernel();
return retval;
}
static void serial_set_termios (struct tty_struct *tty, struct ktermios * old)
{
struct usb_serial_port *port = tty->driver_data;
-
- if (!port)
- return;
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- return;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function if it is available */
if (port->serial->type->set_termios)
port->serial->type->set_termios(port, old);
{
struct usb_serial_port *port = tty->driver_data;
- lock_kernel();
- if (!port) {
- unlock_kernel();
- return;
- }
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- unlock_kernel();
- return;
- }
-
+ WARN_ON(!port->open_count);
/* pass on to the driver specific version of this function if it is available */
- if (port->serial->type->break_ctl)
+ if (port->serial->type->break_ctl) {
+ lock_kernel();
port->serial->type->break_ctl(port, break_state);
- unlock_kernel();
+ unlock_kernel();
+ }
}
static int serial_read_proc (char *page, char **start, off_t off, int count, int *eof, void *data)
{
struct usb_serial_port *port = tty->driver_data;
- if (!port)
- return -ENODEV;
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- return -ENODEV;
- }
-
+ WARN_ON(!port->open_count);
if (port->serial->type->tiocmget)
return port->serial->type->tiocmget(port, file);
-
return -EINVAL;
}
{
struct usb_serial_port *port = tty->driver_data;
- if (!port)
- return -ENODEV;
-
dbg("%s - port %d", __func__, port->number);
- if (!port->open_count) {
- dbg("%s - port not open", __func__);
- return -ENODEV;
- }
-
+ WARN_ON(!port->open_count);
if (port->serial->type->tiocmset)
return port->serial->type->tiocmset(port, file, set, clear);
-
return -EINVAL;
}
}
*/
- if (port->tty->driver->flush_buffer)
- port->tty->driver->flush_buffer(port->tty);
+ tty_driver_flush_buffer(port->tty);
tty_ldisc_flush(port->tty);
firm_report_tx_done(port);
firm_close(port);
-printk(KERN_ERR"Before processing rx_urbs_submitted.\n");
/* shutdown our bulk reads and writes */
mutex_lock(&info->deathwarrant);
spin_lock_irq(&info->lock);
if (tty_paranoia_check(tty, inode, "tty_ioctl"))
return -EINVAL;
- if (tty->driver->ioctl != vt_ioctl)
+ if (tty->ops->ioctl != vt_ioctl)
return -EINVAL;
vc = (struct vc_data *)tty->driver_data;
{
struct proc_dir_entry *ent;
- if ((!driver->read_proc && !driver->write_proc) ||
- !driver->driver_name ||
+ if (!driver->ops->read_proc || !driver->driver_name ||
driver->proc_entry)
return;
ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
if (!ent)
return;
- ent->read_proc = driver->read_proc;
- ent->write_proc = driver->write_proc;
+ ent->read_proc = driver->ops->read_proc;
ent->owner = driver->owner;
ent->data = driver;
* size each time the window is created or resized anyway.
* - TYT, 9/14/92
*/
+
+struct tty_operations;
+
struct tty_struct {
int magic;
struct tty_driver *driver;
+ const struct tty_operations *ops;
int index;
struct tty_ldisc ldisc;
struct mutex termios_mutex;
extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
int buflen);
extern void tty_write_message(struct tty_struct *tty, char *msg);
+extern int tty_put_char(struct tty_struct *tty, unsigned char c);
+extern int tty_chars_in_buffer(struct tty_struct *tty);
+extern int tty_write_room(struct tty_struct *tty);
+extern void tty_driver_flush_buffer(struct tty_struct *tty);
extern int is_current_pgrp_orphaned(void);
extern struct pid *tty_get_pgrp(struct tty_struct *tty);
* This routine is called when a particular tty device is opened.
* This routine is mandatory; if this routine is not filled in,
* the attempted open will fail with ENODEV.
+ *
+ * Required method.
*
* void (*close)(struct tty_struct * tty, struct file * filp);
*
* This routine is called when a particular tty device is closed.
*
+ * Required method.
+ *
* int (*write)(struct tty_struct * tty,
* const unsigned char *buf, int count);
*
* number of characters actually accepted for writing. This
* routine is mandatory.
*
- * void (*put_char)(struct tty_struct *tty, unsigned char ch);
+ * Optional: Required for writable devices.
+ *
+ * int (*put_char)(struct tty_struct *tty, unsigned char ch);
*
* This routine is called by the kernel to write a single
* character to the tty device. If the kernel uses this routine,
* done stuffing characters into the driver. If there is no room
* in the queue, the character is ignored.
*
+ * Optional: Kernel will use the write method if not provided.
+ *
+ * Note: Do not call this function directly, call tty_put_char
+ *
* void (*flush_chars)(struct tty_struct *tty);
*
* This routine is called by the kernel after it has written a
* series of characters to the tty device using put_char().
+ *
+ * Optional:
+ *
+ * Note: Do not call this function directly, call tty_driver_flush_chars
*
* int (*write_room)(struct tty_struct *tty);
*
* will accept for queuing to be written. This number is subject
* to change as output buffers get emptied, or if the output flow
* control is acted.
+ *
+ * Required if write method is provided else not needed.
+ *
+ * Note: Do not call this function directly, call tty_write_room
*
* int (*ioctl)(struct tty_struct *tty, struct file * file,
* unsigned int cmd, unsigned long arg);
* device-specific ioctl's. If the ioctl number passed in cmd
* is not recognized by the driver, it should return ENOIOCTLCMD.
*
+ * Optional
+ *
* long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
* unsigned int cmd, unsigned long arg);
*
* implement ioctl processing for 32 bit process on 64 bit system
+ *
+ * Optional
*
* void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
*
* This routine allows the tty driver to be notified when
- * device's termios settings have changed. Note that a
- * well-designed tty driver should be prepared to accept the case
- * where old == NULL, and try to do something rational.
+ * device's termios settings have changed.
+ *
+ * Optional: Called under the termios lock
+ *
*
* void (*set_ldisc)(struct tty_struct *tty);
*
* This routine allows the tty driver to be notified when the
* device's termios settings have changed.
+ *
+ * Optional: Called under BKL (currently)
*
* void (*throttle)(struct tty_struct * tty);
*
*
* This routine notifies the tty driver that it should stop
* outputting characters to the tty device.
+ *
+ * Optional:
+ *
+ * Note: Call stop_tty not this method.
*
* void (*start)(struct tty_struct *tty);
*
* This routine notifies the tty driver that it resume sending
* characters to the tty device.
+ *
+ * Optional:
+ *
+ * Note: Call start_tty not this method.
*
* void (*hangup)(struct tty_struct *tty);
*
* This routine notifies the tty driver that it should hangup the
* tty device.
*
+ * Required:
+ *
* void (*break_ctl)(struct tty_stuct *tty, int state);
*
* This optional routine requests the tty driver to turn on or
*
* If this routine is implemented, the high-level tty driver will
* handle the following ioctls: TCSBRK, TCSBRKP, TIOCSBRK,
- * TIOCCBRK. Otherwise, these ioctls will be passed down to the
- * driver to handle.
+ * TIOCCBRK.
+ *
+ * Optional: Required for TCSBRK/BRKP/etc handling.
*
* void (*wait_until_sent)(struct tty_struct *tty, int timeout);
*
* This routine waits until the device has written out all of the
* characters in its transmitter FIFO.
*
+ * Optional: If not provided the device is assumed to have no FIFO
+ *
+ * Note: Usually correct to call tty_wait_until_sent
+ *
* void (*send_xchar)(struct tty_struct *tty, char ch);
*
* This routine is used to send a high-priority XON/XOFF
* character to the device.
+ *
+ * Optional: If not provided then the write method is called under
+ * the atomic write lock to keep it serialized with the ldisc.
*/
#include <linux/fs.h>
void (*close)(struct tty_struct * tty, struct file * filp);
int (*write)(struct tty_struct * tty,
const unsigned char *buf, int count);
- void (*put_char)(struct tty_struct *tty, unsigned char ch);
+ int (*put_char)(struct tty_struct *tty, unsigned char ch);
void (*flush_chars)(struct tty_struct *tty);
int (*write_room)(struct tty_struct *tty);
int (*chars_in_buffer)(struct tty_struct *tty);
void (*send_xchar)(struct tty_struct *tty, char ch);
int (*read_proc)(char *page, char **start, off_t off,
int count, int *eof, void *data);
- int (*write_proc)(struct file *file, const char __user *buffer,
- unsigned long count, void *data);
int (*tiocmget)(struct tty_struct *tty, struct file *file);
int (*tiocmset)(struct tty_struct *tty, struct file *file,
unsigned int set, unsigned int clear);
struct tty_struct **ttys;
struct ktermios **termios;
struct ktermios **termios_locked;
- void *driver_state; /* only used for the PTY driver */
-
+ void *driver_state;
+
/*
- * Interface routines from the upper tty layer to the tty
- * driver. Will be replaced with struct tty_operations.
+ * Driver methods
*/
- int (*open)(struct tty_struct * tty, struct file * filp);
- void (*close)(struct tty_struct * tty, struct file * filp);
- int (*write)(struct tty_struct * tty,
- const unsigned char *buf, int count);
- void (*put_char)(struct tty_struct *tty, unsigned char ch);
- void (*flush_chars)(struct tty_struct *tty);
- int (*write_room)(struct tty_struct *tty);
- int (*chars_in_buffer)(struct tty_struct *tty);
- int (*ioctl)(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg);
- long (*compat_ioctl)(struct tty_struct *tty, struct file * file,
- unsigned int cmd, unsigned long arg);
- void (*set_termios)(struct tty_struct *tty, struct ktermios * old);
- void (*throttle)(struct tty_struct * tty);
- void (*unthrottle)(struct tty_struct * tty);
- void (*stop)(struct tty_struct *tty);
- void (*start)(struct tty_struct *tty);
- void (*hangup)(struct tty_struct *tty);
- void (*break_ctl)(struct tty_struct *tty, int state);
- void (*flush_buffer)(struct tty_struct *tty);
- void (*set_ldisc)(struct tty_struct *tty);
- void (*wait_until_sent)(struct tty_struct *tty, int timeout);
- void (*send_xchar)(struct tty_struct *tty, char ch);
- int (*read_proc)(char *page, char **start, off_t off,
- int count, int *eof, void *data);
- int (*write_proc)(struct file *file, const char __user *buffer,
- unsigned long count, void *data);
- int (*tiocmget)(struct tty_struct *tty, struct file *file);
- int (*tiocmset)(struct tty_struct *tty, struct file *file,
- unsigned int set, unsigned int clear);
-#ifdef CONFIG_CONSOLE_POLL
- int (*poll_init)(struct tty_driver *driver, int line, char *options);
- int (*poll_get_char)(struct tty_driver *driver, int line);
- void (*poll_put_char)(struct tty_driver *driver, int line, char ch);
-#endif
+ const struct tty_operations *ops;
struct list_head tty_drivers;
};
*/
void tty_write_message(struct tty_struct *tty, char *msg)
{
- if (tty && tty->driver->write)
- tty->driver->write(tty, msg, strlen(msg));
+ if (tty && tty->ops->write)
+ tty->ops->write(tty, msg, strlen(msg));
return;
}
ircomm_tty_shutdown(self);
- if (tty->driver->flush_buffer)
- tty->driver->flush_buffer(tty);
- if (tty->ldisc.flush_buffer)
- tty->ldisc.flush_buffer(tty);
+ tty_driver_flush_buffer(tty);
+ tty_ldisc_flush(tty);
tty->closing = 0;
self->tty = NULL;
projects / openwrt / staging / blogic.git / commitdiff