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authorAlan Cox <alan@redhat.com>2009-01-02 16:45:05 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-02 21:19:38 +0300
commit31f35939d1d9bcfb3099b32c67b896d2792603f9 (patch)
tree39b6ceaf0e7477e0357ff8235814f579adad3f28 /drivers/char/vme_scc.c
parentc9b3976e3fec266be25c5001a70aa0a890b6c476 (diff)
downloadlinux-31f35939d1d9bcfb3099b32c67b896d2792603f9.tar.xz
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/vme_scc.c')
-rw-r--r--drivers/char/vme_scc.c15
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/char/vme_scc.c b/drivers/char/vme_scc.c
index 1718b3c481db..d4e1534c0e03 100644
--- a/drivers/char/vme_scc.c
+++ b/drivers/char/vme_scc.c
@@ -69,7 +69,7 @@ static void scc_disable_tx_interrupts(void * ptr);
static void scc_enable_tx_interrupts(void * ptr);
static void scc_disable_rx_interrupts(void * ptr);
static void scc_enable_rx_interrupts(void * ptr);
-static int scc_get_CD(void * ptr);
+static int scc_carrier_raised(struct tty_port *port);
static void scc_shutdown_port(void * ptr);
static int scc_set_real_termios(void *ptr);
static void scc_hungup(void *ptr);
@@ -100,7 +100,6 @@ static struct real_driver scc_real_driver = {
scc_enable_tx_interrupts,
scc_disable_rx_interrupts,
scc_enable_rx_interrupts,
- scc_get_CD,
scc_shutdown_port,
scc_set_real_termios,
scc_chars_in_buffer,
@@ -129,6 +128,10 @@ static const struct tty_operations scc_ops = {
.break_ctl = scc_break_ctl,
};
+static const struct tty_port_operations scc_port_ops = {
+ .carrier_raised = scc_carrier_raised,
+};
+
/*----------------------------------------------------------------------------
* vme_scc_init() and support functions
*---------------------------------------------------------------------------*/
@@ -176,6 +179,8 @@ static void scc_init_portstructs(void)
for (i = 0; i < 2; i++) {
port = scc_ports + i;
+ tty_port_init(&port->gs.port);
+ port->gs.port.ops = &scc_port_ops;
port->gs.magic = SCC_MAGIC;
port->gs.close_delay = HZ/2;
port->gs.closing_wait = 30 * HZ;
@@ -624,9 +629,9 @@ static void scc_enable_rx_interrupts(void *ptr)
}
-static int scc_get_CD(void *ptr)
+static int scc_carrier_raised(struct tty_port *port)
{
- struct scc_port *port = ptr;
+ struct scc_port *scc = container_of(port, struct scc_port, gs.port);
unsigned channel = port->channel;
return !!(scc_last_status_reg[channel] & SR_DCD);
@@ -896,7 +901,7 @@ static int scc_open (struct tty_struct * tty, struct file * filp)
return retval;
}
- port->c_dcd = scc_get_CD (port);
+ port->c_dcd = tty_port_carrier_raised(&port->gs.port);
scc_enable_rx_interrupts(port);