It seems Devin Butterfield wrote:
> Hi Soren/group,
>
> After spending a little time sniffing around in my BIOS I realized that
> my BIOS (Award BIOS) defaults to disabling UDMA for both master and
> slave and for some reason I never thought to check this....duh. Anyway
> after setting this to "auto" for both master and slave the problem seems
> to be fixed!
>
> This is curious because I was running the wd driver with the BIOS set
> wrong all along and never had any errors or problems (AFAIK). So why
> does the wd driver seem to ignore this incorrect configuration while the
> ata driver trips over it?
>
> Does this help anyone?
Hmm, maybe.
Try the below patch, but with the BIOS again in the disabled position,
and see if it still fails.
Index: ata-dma.c
===================================================================
RCS file: /home/ncvs/src/sys/dev/ata/ata-dma.c,v
retrieving revision 1.23
diff -u -r1.23 ata-dma.c
--- ata-dma.c 1999/12/14 10:25:25 1.23
+++ ata-dma.c 1999/12/16 10:44:51
@@ -227,6 +227,12 @@
pci_write_config(scp->dev, 0x53,
pci_read_config(scp->dev, 0x53, 1) | 0x03, 1);
scp->flags |= ATA_ATAPI_DMA_RO;
+ if (device == ATA_MASTER)
+ outb(scp->bmaddr + ATA_BMSTAT_PORT,
+ inb(scp->bmaddr + ATA_BMSTAT_PORT) | ATA_BMSTAT_DMA_MASTER);
+ else
+ outb(scp->bmaddr + ATA_BMSTAT_PORT,
+ inb(scp->bmaddr + ATA_BMSTAT_PORT) | ATA_BMSTAT_DMA_SLAVE);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_UDMA2;
return 0;
}
@@ -242,6 +248,12 @@
pci_write_config(scp->dev, 0x53,
pci_read_config(scp->dev, 0x53, 1) | 0x03, 1);
scp->flags |= ATA_ATAPI_DMA_RO;
+ if (device == ATA_MASTER)
+ outb(scp->bmaddr + ATA_BMSTAT_PORT,
+ inb(scp->bmaddr + ATA_BMSTAT_PORT) | ATA_BMSTAT_DMA_MASTER);
+ else
+ outb(scp->bmaddr + ATA_BMSTAT_PORT,
+ inb(scp->bmaddr + ATA_BMSTAT_PORT) | ATA_BMSTAT_DMA_SLAVE);
scp->mode[(device == ATA_MASTER) ? 0 : 1] = ATA_MODE_WDMA2;
return 0;
}
-Søren
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