I ripped off some of your work and made the PDC20246 work.
Please look at the latest patch I have put out for testing.
I need to know that I did not "doink" to cmd646 driver.
On Tue, 24 Nov 1998, David S. Miller wrote:
> Date: Tue, 24 Nov 1998 02:14:08 +0000
> From: Mark Lord <mlord@pobox.com>
>
> I dunno what to make of it, other than
> "UDMA is broken on the Promise Ultra33" card.
>
> If you look at the cmd646.c driver we use on Sparc (and which btw
> should only be available to use on Sparc, someone please prevent
> non-sparc users from using this driver ASAP!) you'll see that UDMA is
> know to be unusable on 646U chipsets, 646U2 chipsets are fine.
>
> The 646U issue is a timing problem during the UDMA handshakes, you can
> solder up a workaround onto the asic (yes, I've done it) but then it
> will only work with Seagate drives.
>
> Later,
> David S. Miller
> davem@dm.cobaltmicro.com
>
Cheers,
Andre Hedrick
The IDE-FNG for Linux
The APC UPS Specialist for Linux
http://www.dyer.vanderbilt.edu/server/udma/
http://www.dyer.vanderbilt.edu/server/apcupsd/apcupsd-3.5.0.bin.tar.gz
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