Re: [PATCH 16/86] pata_efar: MWDMA0 is unsupported

Sergei Shtylyov
2009-11-26T16:16:05Z

Hello.

Bartlomiej Zolnierkiewicz wrote:

>>>>>>MWDMA0 timings cannot be met with the PIIX based controller
>>>>>>programming interface.

>>>>>The efar documentation makes no reference to not being capable of MWDMA0,
>>>>>so where does this come from ? No MWDMA0 is an Intel erratum it appears.

>>>>No MWDMA0 support is a common issue on all 'PIIX-like' controllers.

>>>>In case of this chipset while the (preliminary) documentation claims MWDMA0
>>>>support on the 'FEATURES' page the later 'programming guide' part describes
>>>>only PIO0-4, SWDMA2, MWDMA1-2 and UDMA0-4 transfer modes as supported.

>>>Cool - I only have the original docs.

>> Hm, me too... perhaps worth putting in Jeff's documentation archive?

> Me too? I just have what 'The Good Uncle Google' has..

Well, I've googled for it and was unable to find any valid links even to
my preliminary version anymore. Perhaps I haven't looked hard enough...

> --
> Bartlomiej Zolnierkiewicz

MBR, Sergei