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authorAlan Cox <alan@redhat.com>2009-01-02 08:45:05 -0500
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-02 13:19:38 -0500
commit31f35939d1d9bcfb3099b32c67b896d2792603f9 (patch)
tree39b6ceaf0e7477e0357ff8235814f579adad3f28 /drivers/char/ser_a2232.c
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 'drivers/char/ser_a2232.c')
-rw-r--r--drivers/char/ser_a2232.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/char/ser_a2232.c b/drivers/char/ser_a2232.c
index 7b0c35207d9b..0c97f34df63a 100644
--- a/drivers/char/ser_a2232.c
+++ b/drivers/char/ser_a2232.c
@@ -122,7 +122,7 @@ static void a2232_disable_tx_interrupts(void *ptr);
122static void a2232_enable_tx_interrupts(void *ptr); 122static void a2232_enable_tx_interrupts(void *ptr);
123static void a2232_disable_rx_interrupts(void *ptr); 123static void a2232_disable_rx_interrupts(void *ptr);
124static void a2232_enable_rx_interrupts(void *ptr); 124static void a2232_enable_rx_interrupts(void *ptr);
125static int a2232_get_CD(void *ptr); 125static int a2232_carrier_raised(struct tty_port *port);
126static void a2232_shutdown_port(void *ptr); 126static void a2232_shutdown_port(void *ptr);
127static int a2232_set_real_termios(void *ptr); 127static int a2232_set_real_termios(void *ptr);
128static int a2232_chars_in_buffer(void *ptr); 128static int a2232_chars_in_buffer(void *ptr);
@@ -148,7 +148,6 @@ static struct real_driver a2232_real_driver = {
148 a2232_enable_tx_interrupts, 148 a2232_enable_tx_interrupts,
149 a2232_disable_rx_interrupts, 149 a2232_disable_rx_interrupts,
150 a2232_enable_rx_interrupts, 150 a2232_enable_rx_interrupts,
151 a2232_get_CD,
152 a2232_shutdown_port, 151 a2232_shutdown_port,
153 a2232_set_real_termios, 152 a2232_set_real_termios,
154 a2232_chars_in_buffer, 153 a2232_chars_in_buffer,
@@ -260,9 +259,10 @@ static void a2232_enable_rx_interrupts(void *ptr)
260 port->disable_rx = 0; 259 port->disable_rx = 0;
261} 260}
262 261
263static int a2232_get_CD(void *ptr) 262static int a2232_carrier_raised(struct tty_port *port)
264{ 263{
265 return ((struct a2232_port *) ptr)->cd_status; 264 struct a2232_port *ap = container_of(port, struct a2232_port, gs.port);
265 return ap->cd_status;
266} 266}
267 267
268static void a2232_shutdown_port(void *ptr) 268static void a2232_shutdown_port(void *ptr)
@@ -638,6 +638,10 @@ int ch, err, n, p;
638 return IRQ_HANDLED; 638 return IRQ_HANDLED;
639} 639}
640 640
641static const struct tty_port_operations a2232_port_ops = {
642 .carrier_raised = a2232_carrier_raised,
643};
644
641static void a2232_init_portstructs(void) 645static void a2232_init_portstructs(void)
642{ 646{
643 struct a2232_port *port; 647 struct a2232_port *port;
@@ -645,6 +649,8 @@ static void a2232_init_portstructs(void)
645 649
646 for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) { 650 for (i = 0; i < MAX_A2232_BOARDS*NUMLINES; i++) {
647 port = a2232_ports + i; 651 port = a2232_ports + i;
652 tty_port_init(&port->gs.port);
653 port->gs.port.ops = &a2232_port_ops;
648 port->which_a2232 = i/NUMLINES; 654 port->which_a2232 = i/NUMLINES;
649 port->which_port_on_a2232 = i%NUMLINES; 655 port->which_port_on_a2232 = i%NUMLINES;
650 port->disable_rx = port->throttle_input = port->cd_status = 0; 656 port->disable_rx = port->throttle_input = port->cd_status = 0;
@@ -652,11 +658,6 @@ static void a2232_init_portstructs(void)
652 port->gs.close_delay = HZ/2; 658 port->gs.close_delay = HZ/2;
653 port->gs.closing_wait = 30 * HZ; 659 port->gs.closing_wait = 30 * HZ;
654 port->gs.rd = &a2232_real_driver; 660 port->gs.rd = &a2232_real_driver;
655#ifdef NEW_WRITE_LOCKING
656 mutex_init(&(port->gs.port_write_mutex));
657#endif
658 init_waitqueue_head(&port->gs.port.open_wait);
659 init_waitqueue_head(&port->gs.port.close_wait);
660 } 661 }
661} 662}
662 663