static int cp210x_carrier_raised(struct usb_serial_port *p)
{
unsigned int control;
cp210x_get_config(p, CP210X_GET_MDMSTS, &control, 1);
if (control & CONTROL_DCD)
return 1;
return 0;
}
static int cp210x_tiocmget (struct tty_struct *tty, struct file *file)
{
struct usb_serial_port *port = tty->driver_data;
unsigned int control;
int result;
dbg("%s - port %d", __func__, port->number);
cp210x_get_config(port, CP210X_GET_MDMSTS, &control, 1);
result = ((control & CONTROL_DTR) ? TIOCM_DTR : 0)
|((control & CONTROL_RTS) ? TIOCM_RTS : 0)
|((control & CONTROL_CTS) ? TIOCM_CTS : 0)
|((control & CONTROL_DSR) ? TIOCM_DSR : 0)
|((control & CONTROL_RING)? TIOCM_RI : 0)
|((control & CONTROL_DCD) ? TIOCM_CD : 0);
dbg("%s - control = 0x%.2x", __func__, control);
return result;
}
/*
* cp210x_get_termios_port
* This is the heart of cp210x_get_termios which always uses a &usb_serial_port.
*/
static void cp210x_get_termios_port(struct usb_serial_port *port,
unsigned int *cflagp, unsigned int *baudp)
{
unsigned int cflag, modem_ctl[4];
unsigned int baud;
unsigned int bits;
dbg("%s - port %d", __func__, port->number);
cp210x_get_config(port, CP210X_GET_BAUDDIV, &baud, 2);
/* Convert to baudrate */
if (baud)
baud = cp210x_quantise_baudrate((BAUD_RATE_GEN_FREQ + baud/2)/ baud);
dbg("%s - baud rate = %d", __func__, baud);
*baudp = baud;
cflag = *cflagp;
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
cflag &= ~CSIZE;
switch (bits & BITS_DATA_MASK) {
case BITS_DATA_5:
dbg("%s - data bits = 5", __func__);
cflag |= CS5;
break;
case BITS_DATA_6:
dbg("%s - data bits = 6", __func__);
cflag |= CS6;
break;
case BITS_DATA_7:
dbg("%s - data bits = 7", __func__);
cflag |= CS7;
break;
case BITS_DATA_8:
dbg("%s - data bits = 8", __func__);
cflag |= CS8;
break;
case BITS_DATA_9:
dbg("%s - data bits = 9 (not supported, using 8 data bits)",
__func__);
cflag |= CS8;
bits &= ~BITS_DATA_MASK;
bits |= BITS_DATA_8;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
default:
dbg("%s - Unknown number of data bits, using 8", __func__);
cflag |= CS8;
bits &= ~BITS_DATA_MASK;
bits |= BITS_DATA_8;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
}
switch (bits & BITS_PARITY_MASK) {
case BITS_PARITY_NONE:
dbg("%s - parity = NONE", __func__);
cflag &= ~PARENB;
break;
case BITS_PARITY_ODD:
dbg("%s - parity = ODD", __func__);
cflag |= (PARENB|PARODD);
break;
case BITS_PARITY_EVEN:
dbg("%s - parity = EVEN", __func__);
cflag &= ~PARODD;
cflag |= PARENB;
break;
case BITS_PARITY_MARK:
dbg("%s - parity = MARK (not supported, disabling parity)",
__func__);
cflag &= ~PARENB;
bits &= ~BITS_PARITY_MASK;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
case BITS_PARITY_SPACE:
dbg("%s - parity = SPACE (not supported, disabling parity)",
__func__);
cflag &= ~PARENB;
bits &= ~BITS_PARITY_MASK;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
default:
dbg("%s - Unknown parity mode, disabling parity", __func__);
cflag &= ~PARENB;
bits &= ~BITS_PARITY_MASK;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
}
cflag &= ~CSTOPB;
switch (bits & BITS_STOP_MASK) {
case BITS_STOP_1:
dbg("%s - stop bits = 1", __func__);
break;
case BITS_STOP_1_5:
dbg("%s - stop bits = 1.5 (not supported, using 1 stop bit)",
__func__);
bits &= ~BITS_STOP_MASK;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
case BITS_STOP_2:
dbg("%s - stop bits = 2", __func__);
cflag |= CSTOPB;
break;
default:
dbg("%s - Unknown number of stop bits, using 1 stop bit",
__func__);
bits &= ~BITS_STOP_MASK;
cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2);
break;
}
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
if (modem_ctl[0] & 0x0008) {
dbg("%s - flow control = CRTSCTS", __func__);
cflag |= CRTSCTS;
} else {
dbg("%s - flow control = NONE", __func__);
cflag &= ~CRTSCTS;
}
*cflagp = cflag;
}
static void cp210x_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
unsigned int cflag, old_cflag;
unsigned int baud = 0, bits;
unsigned int modem_ctl[4];
dbg("%s - port %d", __func__, port->number);
if (!tty)
return;
tty->termios->c_cflag &= ~CMSPAR;
cflag = tty->termios->c_cflag;
old_cflag = old_termios->c_cflag;
baud = cp210x_quantise_baudrate(tty_get_baud_rate(tty));
/* If the baud rate is to be updated*/
if (baud != tty_termios_baud_rate(old_termios) && baud != 0) {
dbg("%s - Setting baud rate to %d baud", __func__,
baud);
if (cp210x_set_config_single(port, CP210X_SET_BAUDDIV,
((BAUD_RATE_GEN_FREQ + baud/2) / baud))) {
dbg("Baud rate requested not supported by device");
baud = tty_termios_baud_rate(old_termios);
}
}
/* Report back the resulting baud rate */
tty_encode_baud_rate(tty, baud, baud);
/* If the number of data bits is to be updated */
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_DATA_MASK;
switch (cflag & CSIZE) {
case CS5:
bits |= BITS_DATA_5;
dbg("%s - data bits = 5", __func__);
break;
case CS6:
bits |= BITS_DATA_6;
dbg("%s - data bits = 6", __func__);
break;
case CS7:
bits |= BITS_DATA_7;
dbg("%s - data bits = 7", __func__);
break;
case CS8:
bits |= BITS_DATA_8;
dbg("%s - data bits = 8", __func__);
break;
/*case CS9:
bits |= BITS_DATA_9;
dbg("%s - data bits = 9", __func__);
break;*/
default:
dbg("cp210x driver does not "
"support the number of bits requested,"
" using 8 bit mode\n");
bits |= BITS_DATA_8;
break;
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of data bits requested "
"not supported by device\n");
}
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_PARITY_MASK;
if (cflag & PARENB) {
if (cflag & PARODD) {
bits |= BITS_PARITY_ODD;
dbg("%s - parity = ODD", __func__);
} else {
bits |= BITS_PARITY_EVEN;
dbg("%s - parity = EVEN", __func__);
}
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Parity mode not supported "
"by device\n");
}
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_STOP_MASK;
if (cflag & CSTOPB) {
bits |= BITS_STOP_2;
dbg("%s - stop bits = 2", __func__);
} else {
bits |= BITS_STOP_1;
dbg("%s - stop bits = 1", __func__);
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of stop bits requested "
"not supported by device\n");
}
if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
if (cflag & CRTSCTS) {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x09;
modem_ctl[1] = 0x80;
dbg("%s - flow control = CRTSCTS", __func__);
} else {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x01;
modem_ctl[1] |= 0x40;
dbg("%s - flow control = NONE", __func__);
}
dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
}
}
static void cp210x_set_termios(struct tty_struct *tty,
struct usb_serial_port *port, struct ktermios *old_termios)
{
unsigned int cflag, old_cflag;
unsigned int bits;
unsigned int modem_ctl[4];
dbg("%s - port %d", __func__, port->number);
if (!tty)
return;
tty->termios->c_cflag &= ~CMSPAR;
cflag = tty->termios->c_cflag;
old_cflag = old_termios->c_cflag;
if (tty->termios->c_ospeed != old_termios->c_ospeed)
cp210x_change_speed(tty, port, old_termios);
/* If the number of data bits is to be updated */
if ((cflag & CSIZE) != (old_cflag & CSIZE)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_DATA_MASK;
switch (cflag & CSIZE) {
case CS5:
bits |= BITS_DATA_5;
dbg("%s - data bits = 5", __func__);
break;
case CS6:
bits |= BITS_DATA_6;
dbg("%s - data bits = 6", __func__);
break;
case CS7:
bits |= BITS_DATA_7;
dbg("%s - data bits = 7", __func__);
break;
case CS8:
bits |= BITS_DATA_8;
dbg("%s - data bits = 8", __func__);
break;
/*case CS9:
bits |= BITS_DATA_9;
dbg("%s - data bits = 9", __func__);
break;*/
default:
dbg("cp210x driver does not "
"support the number of bits requested,"
" using 8 bit mode\n");
bits |= BITS_DATA_8;
break;
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of data bits requested "
"not supported by device\n");
}
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_PARITY_MASK;
if (cflag & PARENB) {
if (cflag & PARODD) {
bits |= BITS_PARITY_ODD;
dbg("%s - parity = ODD", __func__);
} else {
bits |= BITS_PARITY_EVEN;
dbg("%s - parity = EVEN", __func__);
}
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Parity mode not supported "
"by device\n");
}
if ((cflag & CSTOPB) != (old_cflag & CSTOPB)) {
cp210x_get_config(port, CP210X_GET_LINE_CTL, &bits, 2);
bits &= ~BITS_STOP_MASK;
if (cflag & CSTOPB) {
bits |= BITS_STOP_2;
dbg("%s - stop bits = 2", __func__);
} else {
bits |= BITS_STOP_1;
dbg("%s - stop bits = 1", __func__);
}
if (cp210x_set_config(port, CP210X_SET_LINE_CTL, &bits, 2))
dbg("Number of stop bits requested "
"not supported by device\n");
}
if ((cflag & CRTSCTS) != (old_cflag & CRTSCTS)) {
cp210x_get_config(port, CP210X_GET_FLOW, modem_ctl, 16);
dbg("%s - read modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
if (cflag & CRTSCTS) {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x09;
modem_ctl[1] = 0x80;
dbg("%s - flow control = CRTSCTS", __func__);
} else {
modem_ctl[0] &= ~0x7B;
modem_ctl[0] |= 0x01;
modem_ctl[1] |= 0x40;
dbg("%s - flow control = NONE", __func__);
}
dbg("%s - write modem controls = 0x%.4x 0x%.4x 0x%.4x 0x%.4x",
__func__, modem_ctl[0], modem_ctl[1],
modem_ctl[2], modem_ctl[3]);
cp210x_set_config(port, CP210X_SET_FLOW, modem_ctl, 16);
}
}
