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Diffstat (limited to 'include/linux/tty.h')
-rw-r--r--include/linux/tty.h27
1 files changed, 25 insertions, 2 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3f4954c55e5..fc39db95499 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -180,8 +180,17 @@ struct signal_struct;
* until a hangup so don't use the wrong path.
*/
+struct tty_port;
+
+struct tty_port_operations {
+ /* Return 1 if the carrier is raised */
+ int (*carrier_raised)(struct tty_port *port);
+ void (*raise_dtr_rts)(struct tty_port *port);
+};
+
struct tty_port {
struct tty_struct *tty; /* Back pointer */
+ const struct tty_port_operations *ops; /* Port operations */
spinlock_t lock; /* Lock protecting tty field */
int blocked_open; /* Waiting to open */
int count; /* Usage count */
@@ -253,6 +262,7 @@ struct tty_struct {
unsigned int column;
unsigned char lnext:1, erasing:1, raw:1, real_raw:1, icanon:1;
unsigned char closing:1;
+ unsigned char echo_overrun:1;
unsigned short minimum_to_wake;
unsigned long overrun_time;
int num_overrun;
@@ -262,11 +272,16 @@ struct tty_struct {
int read_tail;
int read_cnt;
unsigned long read_flags[N_TTY_BUF_SIZE/(8*sizeof(unsigned long))];
+ unsigned char *echo_buf;
+ unsigned int echo_pos;
+ unsigned int echo_cnt;
int canon_data;
unsigned long canon_head;
unsigned int canon_column;
struct mutex atomic_read_lock;
struct mutex atomic_write_lock;
+ struct mutex output_lock;
+ struct mutex echo_lock;
unsigned char *write_buf;
int write_cnt;
spinlock_t read_lock;
@@ -295,6 +310,7 @@ struct tty_struct {
#define TTY_PUSH 6 /* n_tty private */
#define TTY_CLOSING 7 /* ->close() in progress */
#define TTY_LDISC 9 /* Line discipline attached */
+#define TTY_LDISC_CHANGING 10 /* Line discipline changing */
#define TTY_HW_COOK_OUT 14 /* Hardware can do output cooking */
#define TTY_HW_COOK_IN 15 /* Hardware can do input cooking */
#define TTY_PTY_LOCK 16 /* pty private */
@@ -354,8 +370,7 @@ extern int tty_write_room(struct tty_struct *tty);
extern void tty_driver_flush_buffer(struct tty_struct *tty);
extern void tty_throttle(struct tty_struct *tty);
extern void tty_unthrottle(struct tty_struct *tty);
-extern int tty_do_resize(struct tty_struct *tty, struct tty_struct *real_tty,
- struct winsize *ws);
+extern int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
extern void tty_shutdown(struct tty_struct *tty);
extern void tty_free_termios(struct tty_struct *tty);
extern int is_current_pgrp_orphaned(void);
@@ -421,6 +436,14 @@ extern int tty_port_alloc_xmit_buf(struct tty_port *port);
extern void tty_port_free_xmit_buf(struct tty_port *port);
extern struct tty_struct *tty_port_tty_get(struct tty_port *port);
extern void tty_port_tty_set(struct tty_port *port, struct tty_struct *tty);
+extern int tty_port_carrier_raised(struct tty_port *port);
+extern void tty_port_raise_dtr_rts(struct tty_port *port);
+extern void tty_port_hangup(struct tty_port *port);
+extern int tty_port_block_til_ready(struct tty_port *port,
+ struct tty_struct *tty, struct file *filp);
+extern int tty_port_close_start(struct tty_port *port,
+ struct tty_struct *tty, struct file *filp);
+extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty);
extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
extern int tty_unregister_ldisc(int disc);