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authorGraf Yang <graf.yang@analog.com>2008-02-29 06:31:08 +0300
committerBryan Wu <cooloney@kernel.org>2008-02-29 06:31:08 +0300
commit7d01b475ab17018756c8df27c2ee3c220fab05f8 (patch)
treef24b3804a69a899e51175c817ec3bef827dde951 /drivers/serial/bfin_5xx.c
parent0c11700dbfaf0aa5336bd667373ee09db245f3ea (diff)
downloadlinux-7d01b475ab17018756c8df27c2ee3c220fab05f8.tar.xz
Blackfin Serial Driver: Enable IR function when user application (irattach /dev/ttyBFx -s) call TIOCSETD ioctl with line discipline N_IRDA
Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
Diffstat (limited to 'drivers/serial/bfin_5xx.c')
-rw-r--r--drivers/serial/bfin_5xx.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/serial/bfin_5xx.c b/drivers/serial/bfin_5xx.c
index 46bb47f37b9a..4e0b8cd4d4e0 100644
--- a/drivers/serial/bfin_5xx.c
+++ b/drivers/serial/bfin_5xx.c
@@ -900,6 +900,31 @@ bfin_serial_verify_port(struct uart_port *port, struct serial_struct *ser)
return 0;
}
+/*
+ * Enable the IrDA function if tty->ldisc.num is N_IRDA.
+ * In other cases, disable IrDA function.
+ */
+static void bfin_set_ldisc(struct tty_struct *tty)
+{
+ int line = tty->index;
+ unsigned short val;
+
+ if (line >= tty->driver->num)
+ return;
+
+ switch (tty->ldisc.num) {
+ case N_IRDA:
+ val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val |= (IREN | RPOLC);
+ UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ break;
+ default:
+ val = UART_GET_GCTL(&bfin_serial_ports[line]);
+ val &= ~(IREN | RPOLC);
+ UART_PUT_GCTL(&bfin_serial_ports[line], val);
+ }
+}
+
static struct uart_ops bfin_serial_pops = {
.tx_empty = bfin_serial_tx_empty,
.set_mctrl = bfin_serial_set_mctrl,
@@ -1261,6 +1286,7 @@ static int __init bfin_serial_init(void)
ret = uart_register_driver(&bfin_serial_reg);
if (ret == 0) {
+ bfin_serial_reg.tty_driver->set_ldisc = bfin_set_ldisc;
ret = platform_driver_register(&bfin_serial_driver);
if (ret) {
pr_debug("uart register failed\n");