tty: Add termiox

[linux-2.6-omap-h63xx.git] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 0cbec74ec0865af37673d58cbd435d7c39475279..b64d10b66548141e05cebae006ea5e24fef0360d 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
  */
 #define NR_UNIX98_PTY_DEFAULT  4096      /* Default maximum for Unix98 ptys */
 #define NR_UNIX98_PTY_MAX      (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS              18
+#define NR_LDISCS              19
 
 /* line disciplines */
 #define N_TTY          0
@@ -45,6 +45,7 @@
 #define N_HCI          15      /* Bluetooth HCI UART */
 #define N_GIGASET_M101 16      /* Siemens Gigaset M101 serial DECT adapter */
 #define N_SLCAN                17      /* Serial / USB serial CAN Adaptors */
+#define N_PPS          18      /* Pulse per Second */
 
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as
@@ -208,6 +209,7 @@ struct tty_operations;
 
 struct tty_struct {
        int     magic;
+       struct kref kref;
        struct tty_driver *driver;
        const struct tty_operations *ops;
        int index;
@@ -217,6 +219,7 @@ struct tty_struct {
        spinlock_t ctrl_lock;
        /* Termios values are protected by the termios mutex */
        struct ktermios *termios, *termios_locked;
+       struct termiox *termiox;        /* May be NULL for unsupported */
        char name[64];
        struct pid *pgrp;               /* Protected by ctrl lock */
        struct pid *session;
@@ -310,6 +313,23 @@ extern int kmsg_redirect;
 extern void console_init(void);
 extern int vcs_init(void);
 
+/**
+ *     tty_kref_get            -       get a tty reference
+ *     @tty: tty device
+ *
+ *     Return a new reference to a tty object. The caller must hold
+ *     sufficient locks/counts to ensure that their existing reference cannot
+ *     go away
+ */
+
+extern inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
+{
+       if (tty)
+               kref_get(&tty->kref);
+       return tty;
+}
+extern void tty_kref_put(struct tty_struct *tty);
+
 extern int tty_paranoia_check(struct tty_struct *tty, struct inode *inode,
                              const char *routine);
 extern char *tty_name(struct tty_struct *tty, char *buf);
@@ -347,6 +367,9 @@ extern void __do_SAK(struct tty_struct *tty);
 extern void disassociate_ctty(int priv);
 extern void no_tty(void);
 extern void tty_flip_buffer_push(struct tty_struct *tty);
+extern void tty_buffer_free_all(struct tty_struct *tty);
+extern void tty_buffer_flush(struct tty_struct *tty);
+extern void tty_buffer_init(struct tty_struct *tty);
 extern speed_t tty_get_baud_rate(struct tty_struct *tty);
 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);