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path: root/drivers/char/tty_io.c
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Diffstat (limited to 'drivers/char/tty_io.c')
-rw-r--r--drivers/char/tty_io.c137
1 files changed, 38 insertions, 99 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 48cee2004e9..4044c864fdd 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -109,13 +109,15 @@
#define TTY_PARANOIA_CHECK 1
#define CHECK_TTY_COUNT 1
-struct termios tty_std_termios = { /* for the benefit of tty drivers */
+struct ktermios tty_std_termios = { /* for the benefit of tty drivers */
.c_iflag = ICRNL | IXON,
.c_oflag = OPOST | ONLCR,
.c_cflag = B38400 | CS8 | CREAD | HUPCL,
.c_lflag = ISIG | ICANON | ECHO | ECHOE | ECHOK |
ECHOCTL | ECHOKE | IEXTEN,
- .c_cc = INIT_C_CC
+ .c_cc = INIT_C_CC,
+ .c_ispeed = 38400,
+ .c_ospeed = 38400
};
EXPORT_SYMBOL(tty_std_termios);
@@ -1239,6 +1241,22 @@ void tty_ldisc_flush(struct tty_struct *tty)
}
EXPORT_SYMBOL_GPL(tty_ldisc_flush);
+
+/**
+ * tty_reset_termios - reset terminal state
+ * @tty: tty to reset
+ *
+ * Restore a terminal to the driver default state
+ */
+
+static void tty_reset_termios(struct tty_struct *tty)
+{
+ mutex_lock(&tty->termios_mutex);
+ *tty->termios = tty->driver->init_termios;
+ tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
+ tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
+ mutex_unlock(&tty->termios_mutex);
+}
/**
* do_tty_hangup - actual handler for hangup events
@@ -1327,11 +1345,7 @@ static void do_tty_hangup(struct work_struct *work)
* N_TTY.
*/
if (tty->driver->flags & TTY_DRIVER_RESET_TERMIOS)
- {
- mutex_lock(&tty->termios_mutex);
- *tty->termios = tty->driver->init_termios;
- mutex_unlock(&tty->termios_mutex);
- }
+ tty_reset_termios(tty);
/* Defer ldisc switch */
/* tty_deferred_ldisc_switch(N_TTY);
@@ -1870,8 +1884,8 @@ static int init_dev(struct tty_driver *driver, int idx,
struct tty_struct **ret_tty)
{
struct tty_struct *tty, *o_tty;
- struct termios *tp, **tp_loc, *o_tp, **o_tp_loc;
- struct termios *ltp, **ltp_loc, *o_ltp, **o_ltp_loc;
+ struct ktermios *tp, **tp_loc, *o_tp, **o_tp_loc;
+ struct ktermios *ltp, **ltp_loc, *o_ltp, **o_ltp_loc;
int retval = 0;
/* check whether we're reopening an existing tty */
@@ -1918,7 +1932,7 @@ static int init_dev(struct tty_driver *driver, int idx,
}
if (!*tp_loc) {
- tp = (struct termios *) kmalloc(sizeof(struct termios),
+ tp = (struct ktermios *) kmalloc(sizeof(struct ktermios),
GFP_KERNEL);
if (!tp)
goto free_mem_out;
@@ -1926,11 +1940,11 @@ static int init_dev(struct tty_driver *driver, int idx,
}
if (!*ltp_loc) {
- ltp = (struct termios *) kmalloc(sizeof(struct termios),
+ ltp = (struct ktermios *) kmalloc(sizeof(struct ktermios),
GFP_KERNEL);
if (!ltp)
goto free_mem_out;
- memset(ltp, 0, sizeof(struct termios));
+ memset(ltp, 0, sizeof(struct ktermios));
}
if (driver->type == TTY_DRIVER_TYPE_PTY) {
@@ -1951,19 +1965,19 @@ static int init_dev(struct tty_driver *driver, int idx,
}
if (!*o_tp_loc) {
- o_tp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ o_tp = (struct ktermios *)
+ kmalloc(sizeof(struct ktermios), GFP_KERNEL);
if (!o_tp)
goto free_mem_out;
*o_tp = driver->other->init_termios;
}
if (!*o_ltp_loc) {
- o_ltp = (struct termios *)
- kmalloc(sizeof(struct termios), GFP_KERNEL);
+ o_ltp = (struct ktermios *)
+ kmalloc(sizeof(struct ktermios), GFP_KERNEL);
if (!o_ltp)
goto free_mem_out;
- memset(o_ltp, 0, sizeof(struct termios));
+ memset(o_ltp, 0, sizeof(struct ktermios));
}
/*
@@ -2002,6 +2016,9 @@ static int init_dev(struct tty_driver *driver, int idx,
*ltp_loc = ltp;
tty->termios = *tp_loc;
tty->termios_locked = *ltp_loc;
+ /* Compatibility until drivers always set this */
+ tty->termios->c_ispeed = tty_termios_input_baud_rate(tty->termios);
+ tty->termios->c_ospeed = tty_termios_baud_rate(tty->termios);
driver->refcount++;
tty->count++;
@@ -2104,7 +2121,7 @@ release_mem_out:
static void release_mem(struct tty_struct *tty, int idx)
{
struct tty_struct *o_tty;
- struct termios *tp;
+ struct ktermios *tp;
int devpts = tty->driver->flags & TTY_DRIVER_DEVPTS_MEM;
if ((o_tty = tty->link) != NULL) {
@@ -3458,84 +3475,6 @@ static void flush_to_ldisc(struct work_struct *work)
tty_ldisc_deref(disc);
}
-/*
- * Routine which returns the baud rate of the tty
- *
- * Note that the baud_table needs to be kept in sync with the
- * include/asm/termbits.h file.
- */
-static int baud_table[] = {
- 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
- 9600, 19200, 38400, 57600, 115200, 230400, 460800,
-#ifdef __sparc__
- 76800, 153600, 307200, 614400, 921600
-#else
- 500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
- 2500000, 3000000, 3500000, 4000000
-#endif
-};
-
-static int n_baud_table = ARRAY_SIZE(baud_table);
-
-/**
- * tty_termios_baud_rate
- * @termios: termios structure
- *
- * Convert termios baud rate data into a speed. This should be called
- * with the termios lock held if this termios is a terminal termios
- * structure. May change the termios data.
- *
- * Locking: none
- */
-
-int tty_termios_baud_rate(struct termios *termios)
-{
- unsigned int cbaud;
-
- cbaud = termios->c_cflag & CBAUD;
-
- if (cbaud & CBAUDEX) {
- cbaud &= ~CBAUDEX;
-
- if (cbaud < 1 || cbaud + 15 > n_baud_table)
- termios->c_cflag &= ~CBAUDEX;
- else
- cbaud += 15;
- }
- return baud_table[cbaud];
-}
-
-EXPORT_SYMBOL(tty_termios_baud_rate);
-
-/**
- * tty_get_baud_rate - get tty bit rates
- * @tty: tty to query
- *
- * Returns the baud rate as an integer for this terminal. The
- * termios lock must be held by the caller and the terminal bit
- * flags may be updated.
- *
- * Locking: none
- */
-
-int tty_get_baud_rate(struct tty_struct *tty)
-{
- int baud = tty_termios_baud_rate(tty->termios);
-
- if (baud == 38400 && tty->alt_speed) {
- if (!tty->warned) {
- printk(KERN_WARNING "Use of setserial/setrocket to "
- "set SPD_* flags is deprecated\n");
- tty->warned = 1;
- }
- baud = tty->alt_speed;
- }
-
- return baud;
-}
-
-EXPORT_SYMBOL(tty_get_baud_rate);
-
/**
* tty_flip_buffer_push - terminal
* @tty: tty to push
@@ -3758,8 +3697,8 @@ int tty_register_driver(struct tty_driver *driver)
if (p) {
driver->ttys = (struct tty_struct **)p;
- driver->termios = (struct termios **)(p + driver->num);
- driver->termios_locked = (struct termios **)(p + driver->num * 2);
+ driver->termios = (struct ktermios **)(p + driver->num);
+ driver->termios_locked = (struct ktermios **)(p + driver->num * 2);
} else {
driver->ttys = NULL;
driver->termios = NULL;
@@ -3798,7 +3737,7 @@ EXPORT_SYMBOL(tty_register_driver);
int tty_unregister_driver(struct tty_driver *driver)
{
int i;
- struct termios *tp;
+ struct ktermios *tp;
void *p;
if (driver->refcount)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 07:09:12 +0000