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authorAlan Cox <alan@redhat.com>2009-01-02 13:45:05 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-02 10:19:38 -0800
commit31f35939d1d9bcfb3099b32c67b896d2792603f9 (patch)
tree39b6ceaf0e7477e0357ff8235814f579adad3f28 /include
parentc9b3976e3fec266be25c5001a70aa0a890b6c476 (diff)
tty_port: Add a port level carrier detect operation
This is the first step to generalising the various pieces of waiting logic duplicated in all sorts of serial drivers. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/generic_serial.h1
-rw-r--r--include/linux/tty.h9
2 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/generic_serial.h b/include/linux/generic_serial.h
index 4cc91393981..fadff28505b 100644
--- a/include/linux/generic_serial.h
+++ b/include/linux/generic_serial.h
@@ -21,7 +21,6 @@ struct real_driver {
void (*enable_tx_interrupts) (void *);
void (*disable_rx_interrupts) (void *);
void (*enable_rx_interrupts) (void *);
- int (*get_CD) (void *);
void (*shutdown_port) (void*);
int (*set_real_termios) (void*);
int (*chars_in_buffer) (void*);
diff --git a/include/linux/tty.h b/include/linux/tty.h
index bbbeaef9962..bc7bae78e22 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -180,8 +180,16 @@ 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);
+};
+
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 */
@@ -427,6 +435,7 @@ 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 int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc);
extern int tty_unregister_ldisc(int disc);