summaryrefslogtreecommitdiffstats
path: root/drivers/usb
diff options
context:
space:
mode:
authorUwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>2011-10-10 17:24:08 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-18 13:46:29 -0700
commitc75ccd481258d923216337955930ea49ea1a9a1a (patch)
tree57f5fddf7372b6962b12258178997cd41601eaed /drivers/usb
parent8f5d621543cb064d2989fc223d3c2bc61a43981e (diff)
downloadlinux-c75ccd481258d923216337955930ea49ea1a9a1a.tar.bz2
USB: ftdi_sio.c: Basic icount infrastructure for ftdi_sio
Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/serial/ftdi_sio.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index effc43682dc0..4cfc4cd4aae3 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -73,6 +73,7 @@ struct ftdi_private {
*/
int flags; /* some ASYNC_xxxx flags are supported */
unsigned long last_dtr_rts; /* saved modem control outputs */
+ struct async_icount icount;
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
char prev_status, diff_status; /* Used for TIOCMIWAIT */
char transmit_empty; /* If transmitter is empty or not */
@@ -889,6 +890,8 @@ static void ftdi_set_termios(struct tty_struct *tty,
static int ftdi_tiocmget(struct tty_struct *tty);
static int ftdi_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear);
+static int ftdi_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount);
static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg);
static void ftdi_break_ctl(struct tty_struct *tty, int break_state);
@@ -923,6 +926,7 @@ static struct usb_serial_driver ftdi_sio_device = {
.prepare_write_buffer = ftdi_prepare_write_buffer,
.tiocmget = ftdi_tiocmget,
.tiocmset = ftdi_tiocmset,
+ .get_icount = ftdi_get_icount,
.ioctl = ftdi_ioctl,
.set_termios = ftdi_set_termios,
.break_ctl = ftdi_break_ctl,
@@ -1650,6 +1654,7 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
kref_init(&priv->kref);
mutex_init(&priv->cfg_lock);
+ memset(&priv->icount, 0x00, sizeof(priv->icount));
init_waitqueue_head(&priv->delta_msr_wait);
priv->flags = ASYNC_LOW_LATENCY;
@@ -2281,6 +2286,27 @@ static int ftdi_tiocmset(struct tty_struct *tty,
return update_mctrl(port, set, clear);
}
+static int ftdi_get_icount(struct tty_struct *tty,
+ struct serial_icounter_struct *icount)
+{
+ struct usb_serial_port *port = tty->driver_data;
+ struct ftdi_private *priv = usb_get_serial_port_data(port);
+ struct async_icount *ic = &priv->icount;
+
+ icount->cts = ic->cts;
+ icount->dsr = ic->dsr;
+ icount->rng = ic->rng;
+ icount->dcd = ic->dcd;
+ icount->tx = ic->tx;
+ icount->rx = ic->rx;
+ icount->frame = ic->frame;
+ icount->parity = ic->parity;
+ icount->overrun = ic->overrun;
+ icount->brk = ic->brk;
+ icount->buf_overrun = ic->buf_overrun;
+ return 0;
+}
+
static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg)
{