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

Bartlomiej Zolnierkiewicz
2009-11-26T16:30:56Z

On Thursday 26 November 2009 05:17:00 pm Sergei Shtylyov wrote:
> 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...

Maybe... ;)

FWIW my file is called 38384_SMSC_SLC90E66.pdf

--
Bartlomiej Zolnierkiewicz