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SubjectRe: [preview] Latest AMD & VIA IDE drivers with UDMA100 support
On Sun, Jan 21, 2001 at 10:46:06AM +0100, Vojtech Pavlik wrote:
> Ok, the VIA driver from clean 2.2.18 does nothing. It doesn't even use
> hardcoded timings. It doesn't touch any timing tables. It just blindly
> enables prefetch and writeback in the chips. The thing works because it
> relies on BIOS to set things up correctly, and this is often the case,
> yes.

If BIOS is often correct: Is it possible to read these values and compare
them to the values linux calculates? If both match: OK, continue. If they
are different: Either BIOS or linux is wrong, print a warning and disable
DMA (or go to some other kind of 'safe mode').

Just an idea, I don't know anything about chipsets and IDE timings ;-)

Jan

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