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USB: ftdi_sio.c: Basic icount infrastructure for ftdi_sio

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Signed-off-by: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Uwe Bonnes 2011-10-10 17:24:08 +02:00 • committed by Greg Kroah-Hartman
parent 8f5d621543
commit c75ccd4812
1 changed files with 26 additions and 0 deletions
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26
drivers/usb/serial/ftdi_sio.c
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@ -73,6 +73,7 @@ struct ftdi_private {
*/ */
int flags; /* some ASYNC_xxxx flags are supported */ int flags; /* some ASYNC_xxxx flags are supported */
unsigned long last_dtr_rts; /* saved modem control outputs */ unsigned long last_dtr_rts; /* saved modem control outputs */
struct async_icount icount;
wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */ wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
char prev_status, diff_status; /* Used for TIOCMIWAIT */ char prev_status, diff_status; /* Used for TIOCMIWAIT */
char transmit_empty; /* If transmitter is empty or not */ 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_tiocmget(struct tty_struct *tty);
static int ftdi_tiocmset(struct tty_struct *tty, static int ftdi_tiocmset(struct tty_struct *tty,
unsigned int set, unsigned int clear); 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, static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg); unsigned int cmd, unsigned long arg);
static void ftdi_break_ctl(struct tty_struct *tty, int break_state); 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, .prepare_write_buffer = ftdi_prepare_write_buffer,
.tiocmget = ftdi_tiocmget, .tiocmget = ftdi_tiocmget,
.tiocmset = ftdi_tiocmset, .tiocmset = ftdi_tiocmset,
.get_icount = ftdi_get_icount,
.ioctl = ftdi_ioctl, .ioctl = ftdi_ioctl,
.set_termios = ftdi_set_termios, .set_termios = ftdi_set_termios,
.break_ctl = ftdi_break_ctl, .break_ctl = ftdi_break_ctl,
@ -1650,6 +1654,7 @@ static int ftdi_sio_port_probe(struct usb_serial_port *port)
kref_init(&priv->kref); kref_init(&priv->kref);
mutex_init(&priv->cfg_lock); mutex_init(&priv->cfg_lock);
memset(&priv->icount, 0x00, sizeof(priv->icount));
init_waitqueue_head(&priv->delta_msr_wait); init_waitqueue_head(&priv->delta_msr_wait);
priv->flags = ASYNC_LOW_LATENCY; priv->flags = ASYNC_LOW_LATENCY;
@ -2281,6 +2286,27 @@ static int ftdi_tiocmset(struct tty_struct *tty,
return update_mctrl(port, set, clear); 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, static int ftdi_ioctl(struct tty_struct *tty,
unsigned int cmd, unsigned long arg) unsigned int cmd, unsigned long arg)
{ {