Messages in this thread | | | From | Bartlomiej Zolnierkiewicz <> | Subject | Re: [PATCH] pata_it8213: MWDMA0 is unsupported | Date | Thu, 26 Nov 2009 19:00:11 +0100 |
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On Thursday 26 November 2009 06:23:18 pm Sergei Shtylyov wrote: > Bartlomiej Zolnierkiewicz wrote: > > >>MWDMA0 timings cannot be met with the PIIX based controller > >>programming interface. > > >>This change should be safe as this is how we have been doing > >>things in IDE it8213 host driver for years. > > >>Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> > >>--- > >>Verified with the documentation (similar case as with pata_efar). > > > Uhhh, no... > > > Too many damn drivers. > > > Too much damn duplication. > > > Too much damn subtle differences here and there. > > > The hardware is probably fine for MWMDA0 when it comes to pata_{efar,it8213}, > > it just not documented properly in the data sheet. > > How so with pata_efar? The active/recovery bitfields are still 2-bit > wide, no?
Yes but when TIMEx bit is disabled we are using XFER_PIO_SLOW timings.
All data sheets including original Intel ones are a complete crap when it comes to explicitly documenting this behavior.
-- Bartlomiej Zolnierkiewicz
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