Merge branch 'drm-armada-fixes' of git://git.armlinux.org.uk/~rmk/linux-arm into...

[cascardo/linux.git] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 3b09f23..40144f3 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -228,7 +228,8 @@ struct tty_port {
        int                     count;          /* Usage count */
        wait_queue_head_t       open_wait;      /* Open waiters */
        wait_queue_head_t       delta_msr_wait; /* Modem status change */
-       unsigned long           flags;          /* TTY flags ASY_*/
+       unsigned long           flags;          /* User TTY flags ASYNC_ */
+       unsigned long           iflags;         /* Internal flags TTY_PORT_ */
        unsigned char           console:1,      /* port is a console */
                                low_latency:1;  /* optional: tune for latency */
        struct mutex            mutex;          /* Locking */
@@ -242,6 +243,18 @@ struct tty_port {
        struct kref             kref;           /* Ref counter */
 };
 
+/* tty_port::iflags bits -- use atomic bit ops */
+#define TTY_PORT_INITIALIZED   0       /* device is initialized */
+#define TTY_PORT_SUSPENDED     1       /* device is suspended */
+#define TTY_PORT_ACTIVE                2       /* device is open */
+
+/*
+ * uart drivers: use the uart_port::status field and the UPSTAT_* defines
+ * for s/w-based flow control steering and carrier detection status
+ */
+#define TTY_PORT_CTS_FLOW      3       /* h/w flow control enabled */
+#define TTY_PORT_CHECK_CD      4       /* carrier detect enabled */
+
 /*
  * Where all of the state associated with a tty is kept while the tty
  * is open.  Since the termios state should be kept even if the tty
@@ -338,7 +351,6 @@ struct tty_file_private {
 #define TTY_OTHER_CLOSED       2       /* Other side (if any) has closed */
 #define TTY_EXCLUSIVE          3       /* Exclusive open mode */
 #define TTY_DO_WRITE_WAKEUP    5       /* Call write_wakeup after queuing new */
-#define TTY_OTHER_DONE         6       /* Closed pty has completed input processing */
 #define TTY_LDISC_OPEN         11      /* Line discipline is open */
 #define TTY_PTY_LOCK           16      /* pty private */
 #define TTY_NO_WRITE_SPLIT     17      /* Preserve write boundaries to driver */
@@ -360,6 +372,16 @@ static inline void tty_set_flow_change(struct tty_struct *tty, int val)
        smp_mb();
 }
 
+static inline bool tty_io_error(struct tty_struct *tty)
+{
+       return test_bit(TTY_IO_ERROR, &tty->flags);
+}
+
+static inline bool tty_throttled(struct tty_struct *tty)
+{
+       return test_bit(TTY_THROTTLED, &tty->flags);
+}
+
 #ifdef CONFIG_TTY
 extern void console_init(void);
 extern void tty_kref_put(struct tty_struct *tty);
@@ -371,6 +393,7 @@ extern void proc_clear_tty(struct task_struct *p);
 extern struct tty_struct *get_current_tty(void);
 /* tty_io.c */
 extern int __init tty_init(void);
+extern const char *tty_name(const struct tty_struct *tty);
 #else
 static inline void console_init(void)
 { }
@@ -391,6 +414,8 @@ static inline struct tty_struct *get_current_tty(void)
 /* tty_io.c */
 static inline int __init tty_init(void)
 { return 0; }
+static inline const char *tty_name(const struct tty_struct *tty)
+{ return "(none)"; }
 #endif
 
 extern struct ktermios tty_std_termios;
@@ -415,7 +440,6 @@ static inline struct tty_struct *tty_kref_get(struct tty_struct *tty)
        return tty;
 }
 
-extern const char *tty_name(const struct tty_struct *tty);
 extern const char *tty_driver_name(const struct tty_struct *tty);
 extern void tty_wait_until_sent(struct tty_struct *tty, long timeout);
 extern int __tty_check_change(struct tty_struct *tty, int sig);
@@ -457,6 +481,7 @@ extern void tty_buffer_init(struct tty_port *port);
 extern void tty_buffer_set_lock_subclass(struct tty_port *port);
 extern bool tty_buffer_restart_work(struct tty_port *port);
 extern bool tty_buffer_cancel_work(struct tty_port *port);
+extern void tty_buffer_flush_work(struct tty_port *port);
 extern speed_t tty_termios_baud_rate(struct ktermios *termios);
 extern speed_t tty_termios_input_baud_rate(struct ktermios *termios);
 extern void tty_termios_encode_baud_rate(struct ktermios *termios,
@@ -537,7 +562,67 @@ static inline struct tty_port *tty_port_get(struct tty_port *port)
 /* If the cts flow control is enabled, return true. */
 static inline bool tty_port_cts_enabled(struct tty_port *port)
 {
-       return port->flags & ASYNC_CTS_FLOW;
+       return test_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+}
+
+static inline void tty_port_set_cts_flow(struct tty_port *port, bool val)
+{
+       if (val)
+               set_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+       else
+               clear_bit(TTY_PORT_CTS_FLOW, &port->iflags);
+}
+
+static inline bool tty_port_active(struct tty_port *port)
+{
+       return test_bit(TTY_PORT_ACTIVE, &port->iflags);
+}
+
+static inline void tty_port_set_active(struct tty_port *port, bool val)
+{
+       if (val)
+               set_bit(TTY_PORT_ACTIVE, &port->iflags);
+       else
+               clear_bit(TTY_PORT_ACTIVE, &port->iflags);
+}
+
+static inline bool tty_port_check_carrier(struct tty_port *port)
+{
+       return test_bit(TTY_PORT_CHECK_CD, &port->iflags);
+}
+
+static inline void tty_port_set_check_carrier(struct tty_port *port, bool val)
+{
+       if (val)
+               set_bit(TTY_PORT_CHECK_CD, &port->iflags);
+       else
+               clear_bit(TTY_PORT_CHECK_CD, &port->iflags);
+}
+
+static inline bool tty_port_suspended(struct tty_port *port)
+{
+       return test_bit(TTY_PORT_SUSPENDED, &port->iflags);
+}
+
+static inline void tty_port_set_suspended(struct tty_port *port, bool val)
+{
+       if (val)
+               set_bit(TTY_PORT_SUSPENDED, &port->iflags);
+       else
+               clear_bit(TTY_PORT_SUSPENDED, &port->iflags);
+}
+
+static inline bool tty_port_initialized(struct tty_port *port)
+{
+       return test_bit(TTY_PORT_INITIALIZED, &port->iflags);
+}
+
+static inline void tty_port_set_initialized(struct tty_port *port, bool val)
+{
+       if (val)
+               set_bit(TTY_PORT_INITIALIZED, &port->iflags);
+       else
+               clear_bit(TTY_PORT_INITIALIZED, &port->iflags);
 }
 
 extern struct tty_struct *tty_port_tty_get(struct tty_port *port);