[src/trunk]: src/sys/dev/usb Try harder to avoid 0 ports woth AMD756. From O...

[augustss <augustss%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d71ff202f943
branches:  trunk
changeset: 555634:d71ff202f943
user:      augustss <augustss%NetBSD.org@localhost>
date:      Sun Nov 23 19:20:25 2003 +0000

description:
Try harder to avoid 0 ports woth AMD756.  From OpenBSD.

diffstat:

 sys/dev/usb/ohci.c |  11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diffs (32 lines):

diff -r 1c8ea0cb6302 -r d71ff202f943 sys/dev/usb/ohci.c
--- a/sys/dev/usb/ohci.c        Sun Nov 23 19:18:06 2003 +0000
+++ b/sys/dev/usb/ohci.c        Sun Nov 23 19:20:25 2003 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: ohci.c,v 1.144 2003/11/23 19:18:06 augustss Exp $      */
+/*     $NetBSD: ohci.c,v 1.145 2003/11/23 19:20:25 augustss Exp $      */
 /*     $FreeBSD: src/sys/dev/usb/ohci.c,v 1.22 1999/11/17 22:33:40 n_hibma Exp $       */
 
 /*
@@ -46,7 +46,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: ohci.c,v 1.144 2003/11/23 19:18:06 augustss Exp $");
+__KERNEL_RCSID(0, "$NetBSD: ohci.c,v 1.145 2003/11/23 19:20:25 augustss Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -854,8 +854,11 @@
         * The AMD756 requires a delay before re-reading the register,
         * otherwise it will occasionally report 0 ports.
         */
-       usb_delay_ms(&sc->sc_bus, OHCI_READ_DESC_DELAY);
-       sc->sc_noport = OHCI_GET_NDP(OREAD4(sc, OHCI_RH_DESCRIPTOR_A));
+       sc->sc_noport = 0;
+       for (i = 0; i < 10 && sc->sc_noport == 0; i++) {
+               usb_delay_ms(&sc->sc_bus, OHCI_READ_DESC_DELAY);
+               sc->sc_noport = OHCI_GET_NDP(OREAD4(sc, OHCI_RH_DESCRIPTOR_A));
+       }
 
 #ifdef OHCI_DEBUG
        if (ohcidebug > 5)