diff options
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/ftdi_sio.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index effc43682dc..4cfc4cd4aae 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) { |