Author: gavin
Date: Sun Aug 8 20:53:00 2010
New Revision: 211083
URL: http://svn.freebsd.org/changeset/base/211083
Log:
The PL2302X can support any baud rate <= 6Mbps, allow any rate to be set.
PR: usb/128324
Submitted by: Mike Durian <durian shadetreesoftware.com> (original patch)
MFC after: 2 weeks
Modified:
head/sys/dev/usb/serial/uplcom.c
Modified: head/sys/dev/usb/serial/uplcom.c
==============================================================================
--- head/sys/dev/usb/serial/uplcom.c Sun Aug 8 20:34:53 2010
(r211082)
+++ head/sys/dev/usb/serial/uplcom.c Sun Aug 8 20:53:00 2010
(r211083)
@@ -599,25 +599,33 @@ static const int32_t uplcom_rates[] = {
static int
uplcom_pre_param(struct ucom_softc *ucom, struct termios *t)
{
+ struct uplcom_softc *sc = ucom->sc_parent;
uint8_t i;
DPRINTF("\n");
- /* check requested baud rate */
-
- for (i = 0;; i++) {
-
- if (i != N_UPLCOM_RATES) {
- if (uplcom_rates[i] == t->c_ospeed) {
- break;
- }
- } else {
- DPRINTF("invalid baud rate (%d)\n", t->c_ospeed);
- return (EIO);
+ /**
+ * Check requested baud rate.
+ *
+ * The PL2303 can only set specific baud rates, up to 1228800 baud.
+ * The PL2303X can set any baud rate up to 6Mb.
+ * The PL2303HX rev. D can set any baud rate up to 12Mb.
+ *
+ * XXX: We currently cannot identify the PL2303HX rev. D, so treat
+ * it the same as the PL2303X.
+ */
+ if (sc->sc_chiptype == TYPE_PL2303) {
+ for (i = 0; i < N_UPLCOM_RATES; i++) {
+ if (uplcom_rates[i] == t->c_ospeed)
+ return (0);
}
+ } else {
+ if (t->c_ospeed <= 6000000)
+ return (0);
}
- return (0);
+ DPRINTF("uplcom_param: bad baud rate (%d)\n", t->c_ospeed);
+ return (EIO);
}
static void
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