tty: Implement a drain delay in the tty port

[pandora-kernel.git] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3f4954c..bed5a3d 100644 (file)
--- 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 (*dtr_rts)(struct tty_port *port, int raise);
+};
+       
 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 */
@@ -192,6 +201,9 @@ struct tty_port {
        unsigned char           *xmit_buf;      /* Optional buffer */
        int                     close_delay;    /* Close port delay */
        int                     closing_wait;   /* Delay for output */
+       int                     drain_delay;    /* Set to zero if no pure time
+                                                  based drain is needed else
+                                                  set to size of fifo */
 };
 
 /*
@@ -253,6 +265,7 @@ 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 +275,16 @@ 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 +313,7 @@ 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 +373,7 @@ 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 +439,15 @@ 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_lower_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);