[src/trunk]: src/sys/dev/pci Workaround for buggy OPTi pciide chipset revisio...

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

details:   https://anonhg.NetBSD.org/src/rev/6d6df65db939
branches:  trunk
changeset: 511119:6d6df65db939
user:      scw <scw%NetBSD.org@localhost>
date:      Wed Jun 13 09:55:25 2001 +0000

description:
Workaround for buggy OPTi pciide chipset revisions, as reported
in PR/11644.

diffstat:

 sys/dev/pci/pciide.c |  23 +++++++++++++++++++----
 1 files changed, 19 insertions(+), 4 deletions(-)

diffs (39 lines):

diff -r 709d71eb7398 -r 6d6df65db939 sys/dev/pci/pciide.c
--- a/sys/dev/pci/pciide.c      Wed Jun 13 08:48:06 2001 +0000
+++ b/sys/dev/pci/pciide.c      Wed Jun 13 09:55:25 2001 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pciide.c,v 1.119 2001/06/08 04:48:58 simonb Exp $      */
+/*     $NetBSD: pciide.c,v 1.120 2001/06/13 09:55:25 scw Exp $ */
 
 
 /*
@@ -3607,11 +3607,26 @@
                return;
        printf("%s: bus-master DMA support present",
            sc->sc_wdcdev.sc_dev.dv_xname);
-       pciide_mapreg_dma(sc, pa);
+
+       /*
+        * XXXSCW:
+        * There seem to be a couple of buggy revisions/implementations
+        * of the OPTi pciide chipset. This kludge seems to fix one of
+        * the reported problems (PR/11644) but still fails for the
+        * other (PR/13151), although the latter may be due to other
+        * issues too...
+        */
+       if (PCI_REVISION(pa->pa_class) <= 0x12) {
+               printf(" but disabled due to chip rev. <= 0x12");
+               sc->sc_dma_ok = 0;
+               sc->sc_wdcdev.cap = 0;
+       } else {
+               sc->sc_wdcdev.cap = WDC_CAPABILITY_DATA32;
+               pciide_mapreg_dma(sc, pa);
+       }
        printf("\n");
 
-       sc->sc_wdcdev.cap = WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_DATA32 |
-           WDC_CAPABILITY_MODE;
+       sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_MODE;
        sc->sc_wdcdev.PIO_cap = 4;
        if (sc->sc_dma_ok) {
                sc->sc_wdcdev.cap |= WDC_CAPABILITY_DMA | WDC_CAPABILITY_IRQACK;