Messages in this thread | | | Date | Thu, 26 Nov 2009 19:44:07 +0300 | From | Sergei Shtylyov <> | Subject | Re: [PATCH 16/86] pata_efar: MWDMA0 is unsupported |
| |
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
Well, that brought me to some Chinese site with 07/10/2002 version (which I've already found minutes before that). But it still claims support for MWDMA0 under the features... ah, I need to look further down... no "programming guide" part, hm... but thanks anyway. :-)
> -- > Bartlomiej Zolnierkiewicz
WBR, Sergei
| |