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Allow arbitrary baud rates, not just the standard ones.

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This commit is contained in:
Ed Maste 2008-01-26 04:30:48 +00:00
parent c2791efe44
commit 5cc204ee18
1 changed files with 13 additions and 21 deletions
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34
sys/dev/usb/uark.c
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@ -225,29 +225,21 @@ static int
uark_param(void *vsc, int portno, struct termios *t)
{
struct uark_softc *sc = (struct uark_softc *)vsc;
int data;
int data, divisor;
speed_t speed = t->c_ospeed;
switch (t->c_ospeed) {
case 300:
case 600:
case 1200:
case 1800:
case 2400:
case 4800:
case 9600:
case 19200:
case 38400:
case 57600:
case 115200:
uark_cmd(sc, 3, 0x83);
uark_cmd(sc, 0, (UARK_BAUD_REF / t->c_ospeed) & 0xFF);
uark_cmd(sc, 1, (UARK_BAUD_REF / t->c_ospeed) >> 8);
uark_cmd(sc, 3, 0x03);
break;
default:
if (speed < 300 || speed > 115200)
return (EINVAL);
/* NOTREACHED */
}
divisor = (UARK_BAUD_REF + speed / 2) / speed;
/* Check that we're within 3% of the requested rate. */
if (speed * divisor < UARK_BAUD_REF * 100 / 103 ||
speed * divisor > UARK_BAUD_REF * 100 / 97)
return (EINVAL);
uark_cmd(sc, 3, 0x83);
uark_cmd(sc, 0, divisor & 0xFF);
uark_cmd(sc, 1, divisor >> 8);
uark_cmd(sc, 3, 0x03);
if (ISSET(t->c_cflag, CSTOPB))
data = UARK_STOP_BITS_2;
else