static int spcp8x5_tiocmget(struct tty_struct *tty)
{
struct usb_serial_port *port = tty->driver_data;
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
unsigned long flags;
unsigned int mcr;
u8 status;
unsigned int result;
result = spcp8x5_get_msr(port, &status);
if (result)
return result;
spin_lock_irqsave(&priv->lock, flags);
mcr = priv->line_control;
spin_unlock_irqrestore(&priv->lock, flags);
result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
| ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
| ((status & MSR_STATUS_LINE_CTS) ? TIOCM_CTS : 0)
| ((status & MSR_STATUS_LINE_DSR) ? TIOCM_DSR : 0)
| ((status & MSR_STATUS_LINE_RI) ? TIOCM_RI : 0)
| ((status & MSR_STATUS_LINE_DCD) ? TIOCM_CD : 0);
return result;
}
static int spcp8x5_carrier_raised(struct usb_serial_port *port)
{
u8 msr;
int ret;
ret = spcp8x5_get_msr(port, &msr);
if (ret || msr & MSR_STATUS_LINE_DCD)
return 1;
return 0;
}
/* open the serial port. do some usb system call. set termios and get the line
* status of the device. then submit the read urb */
static int spcp8x5_open(struct tty_struct *tty,
struct usb_serial_port *port, struct file *filp)
{
struct ktermios tmp_termios;
struct usb_serial *serial = port->serial;
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
int ret;
unsigned long flags;
u8 status = 0x30;
/* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
dbg("%s - port %d", __func__, port->number);
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
0x09, 0x00,
0x01, 0x00, NULL, 0x00, 100);
if (ret)
return ret;
spin_lock_irqsave(&priv->lock, flags);
if (tty && (tty->termios->c_cflag & CBAUD))
priv->line_control = MCR_DTR | MCR_RTS;
else
priv->line_control = 0;
spin_unlock_irqrestore(&priv->lock, flags);
spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
/* Setup termios */
if (tty)
spcp8x5_set_termios(tty, port, &tmp_termios);
spcp8x5_get_msr(serial->dev, &status, priv->type);
/* may be we should update uart status here but now we did not do */
spin_lock_irqsave(&priv->lock, flags);
priv->line_status = status & 0xf0 ;
spin_unlock_irqrestore(&priv->lock, flags);
/* FIXME: need to assert RTS and DTR if CRTSCTS off */
dbg("%s - submitting read urb", __func__);
port->read_urb->dev = serial->dev;
ret = usb_submit_urb(port->read_urb, GFP_KERNEL);
if (ret) {
spcp8x5_close(tty, port, NULL);
return -EPROTO;
}
return 0;
}
/* open the serial port. do some usb system call. set termios and get the line
* status of the device. */
static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
{
struct ktermios tmp_termios;
struct usb_serial *serial = port->serial;
struct spcp8x5_private *priv = usb_get_serial_port_data(port);
int ret;
unsigned long flags;
u8 status = 0x30;
/* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
usb_clear_halt(serial->dev, port->write_urb->pipe);
usb_clear_halt(serial->dev, port->read_urb->pipe);
ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
0x09, 0x00,
0x01, 0x00, NULL, 0x00, 100);
if (ret)
return ret;
spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
/* Setup termios */
if (tty)
spcp8x5_set_termios(tty, port, &tmp_termios);
spcp8x5_get_msr(serial->dev, &status, priv->type);
/* may be we should update uart status here but now we did not do */
spin_lock_irqsave(&priv->lock, flags);
priv->line_status = status & 0xf0 ;
spin_unlock_irqrestore(&priv->lock, flags);
port->port.drain_delay = 256;
return usb_serial_generic_open(tty, port);
}