static void mct_u232_set_termios(struct tty_struct *tty,
struct usb_serial_port *port,
struct ktermios *old_termios)
{
struct usb_serial *serial = port->serial;
struct mct_u232_private *priv = usb_get_serial_port_data(port);
struct ktermios *termios = tty->termios;
unsigned int cflag = termios->c_cflag;
unsigned int old_cflag = old_termios->c_cflag;
unsigned long flags;
unsigned int control_state;
unsigned char last_lcr;
/* get a local copy of the current port settings */
spin_lock_irqsave(&priv->lock, flags);
control_state = priv->control_state;
spin_unlock_irqrestore(&priv->lock, flags);
last_lcr = 0;
/*
* Update baud rate.
* Do not attempt to cache old rates and skip settings,
* disconnects screw such tricks up completely.
* Premature optimization is the root of all evil.
*/
/* reassert DTR and RTS on transition from B0 */
if ((old_cflag & CBAUD) == B0) {
dbg("%s: baud was B0", __func__);
control_state |= TIOCM_DTR | TIOCM_RTS;
mct_u232_set_modem_ctrl(serial, control_state);
}
mct_u232_set_baud_rate(tty, serial, port, tty_get_baud_rate(tty));
if ((cflag & CBAUD) == B0) {
dbg("%s: baud is B0", __func__);
/* Drop RTS and DTR */
control_state &= ~(TIOCM_DTR | TIOCM_RTS);
mct_u232_set_modem_ctrl(serial, control_state);
}
/*
* Update line control register (LCR)
*/
/* set the parity */
if (cflag & PARENB)
last_lcr |= (cflag & PARODD) ?
MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
else
last_lcr |= MCT_U232_PARITY_NONE;
/* set the number of data bits */
switch (cflag & CSIZE) {
case CS5:
last_lcr |= MCT_U232_DATA_BITS_5; break;
case CS6:
last_lcr |= MCT_U232_DATA_BITS_6; break;
case CS7:
last_lcr |= MCT_U232_DATA_BITS_7; break;
case CS8:
last_lcr |= MCT_U232_DATA_BITS_8; break;
default:
dev_err(&port->dev,
"CSIZE was not CS5-CS8, using default of 8\n");
last_lcr |= MCT_U232_DATA_BITS_8;
break;
}
termios->c_cflag &= ~CMSPAR;
/* set the number of stop bits */
last_lcr |= (cflag & CSTOPB) ?
MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
mct_u232_set_line_ctrl(serial, last_lcr);
/* save off the modified port settings */
spin_lock_irqsave(&priv->lock, flags);
priv->control_state = control_state;
priv->last_lcr = last_lcr;
spin_unlock_irqrestore(&priv->lock, flags);
} /* mct_u232_set_termios */
static void mct_u232_set_termios (struct usb_serial_port *port,
struct termios *old_termios)
{
struct usb_serial *serial = port->serial;
struct mct_u232_private *priv = usb_get_serial_port_data(port);
unsigned int iflag = port->tty->termios->c_iflag;
unsigned int cflag = port->tty->termios->c_cflag;
unsigned int old_cflag = old_termios->c_cflag;
unsigned long flags;
unsigned int control_state, new_state;
unsigned char last_lcr;
/* get a local copy of the current port settings */
spin_lock_irqsave(&priv->lock, flags);
control_state = priv->control_state;
spin_unlock_irqrestore(&priv->lock, flags);
last_lcr = 0;
/*
* Update baud rate.
* Do not attempt to cache old rates and skip settings,
* disconnects screw such tricks up completely.
* Premature optimization is the root of all evil.
*/
/* reassert DTR and (maybe) RTS on transition from B0 */
if ((old_cflag & CBAUD) == B0) {
dbg("%s: baud was B0", __FUNCTION__);
control_state |= TIOCM_DTR;
/* don't set RTS if using hardware flow control */
if (!(old_cflag & CRTSCTS)) {
control_state |= TIOCM_RTS;
}
mct_u232_set_modem_ctrl(serial, control_state);
}
mct_u232_set_baud_rate(serial, cflag & CBAUD);
if ((cflag & CBAUD) == B0 ) {
dbg("%s: baud is B0", __FUNCTION__);
/* Drop RTS and DTR */
control_state &= ~(TIOCM_DTR | TIOCM_RTS);
mct_u232_set_modem_ctrl(serial, control_state);
}
/*
* Update line control register (LCR)
*/
/* set the parity */
if (cflag & PARENB)
last_lcr |= (cflag & PARODD) ?
MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN;
else
last_lcr |= MCT_U232_PARITY_NONE;
/* set the number of data bits */
switch (cflag & CSIZE) {
case CS5:
last_lcr |= MCT_U232_DATA_BITS_5; break;
case CS6:
last_lcr |= MCT_U232_DATA_BITS_6; break;
case CS7:
last_lcr |= MCT_U232_DATA_BITS_7; break;
case CS8:
last_lcr |= MCT_U232_DATA_BITS_8; break;
default:
err("CSIZE was not CS5-CS8, using default of 8");
last_lcr |= MCT_U232_DATA_BITS_8;
break;
}
/* set the number of stop bits */
last_lcr |= (cflag & CSTOPB) ?
MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1;
mct_u232_set_line_ctrl(serial, last_lcr);
/*
* Set flow control: well, I do not really now how to handle DTR/RTS.
* Just do what we have seen with SniffUSB on Win98.
*/
/* Drop DTR/RTS if no flow control otherwise assert */
new_state = control_state;
if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS))
new_state |= TIOCM_DTR | TIOCM_RTS;
else
new_state &= ~(TIOCM_DTR | TIOCM_RTS);
if (new_state != control_state) {
mct_u232_set_modem_ctrl(serial, new_state);
control_state = new_state;
}
/* save off the modified port settings */
spin_lock_irqsave(&priv->lock, flags);
priv->control_state = control_state;
priv->last_lcr = last_lcr;
spin_unlock_irqrestore(&priv->lock, flags);
} /* mct_u232_set_termios */