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USB: serial: cp210x.c: add mark/space parity 

Add mark and space parity support.

Signed-off-by: Roland Koebler <r.koebler@yahoo.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Roland Koebler 2011-11-09 19:37:08 +01:00 committed by Greg Kroah-Hartman
parent 968b822c00
commit 4b6181caa4
1 changed files with 22 additions and 17 deletions
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39
drivers/usb/serial/cp210x.c
View File

@ -520,18 +520,13 @@ static void cp210x_get_termios_port(struct usb_serial_port *port,
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);
dbg("%s - parity = MARK", __func__);
cflag |= (PARENB|PARODD|CMSPAR);
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);
dbg("%s - parity = SPACE", __func__);
cflag &= ~PARODD;
cflag |= (PARENB|CMSPAR);
break;
default:
dbg("%s - Unknown parity mode, disabling parity", __func__);
@ -588,7 +583,6 @@ static void cp210x_set_termios(struct tty_struct *tty,
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));
@ -643,16 +637,27 @@ static void cp210x_set_termios(struct tty_struct *tty,
"not supported by device\n");
}
if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD))) {
if ((cflag & (PARENB|PARODD|CMSPAR)) !=
(old_cflag & (PARENB|PARODD|CMSPAR))) {
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__);
if (cflag & CMSPAR) {
if (cflag & PARODD) {
bits |= BITS_PARITY_MARK;
dbg("%s - parity = MARK", __func__);
} else {
bits |= BITS_PARITY_SPACE;
dbg("%s - parity = SPACE", __func__);
}
} else {
bits |= BITS_PARITY_EVEN;
dbg("%s - parity = EVEN", __func__);
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))