Re: [PATCH] pata_it8213: MWDMA0 is unsupported
From: Sergei Shtylyov <hidden>
Date: 2009-12-03 22:06:52
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From: Sergei Shtylyov <hidden>
Date: 2009-12-03 22:06:52
Also in:
lkml
Hello. Jeff Garzik wrote:
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MWDMA0 timings cannot be met with the PIIX based controller programming interface.quoted
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This change should be safe as this is how we have been doing things in IDE it8213 host driver for years.quoted
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Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> --- Verified with the documentation (similar case as with pata_efar).quoted
Uhhh, no...quoted
Too many damn drivers.quoted
Too much damn duplication.quoted
Too much damn subtle differences here and there.quoted
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?So.... pata_it8213 is fine for MWDMA0, then?
No, TTBOMK. I just have no datasheet. However, it's programmed overclocked and even in theory the cycle time cannot exceeed 600 ns vs 480 ns spec'ed.
Jeff
MBR, Sergei