Re: [PATCH] libata:ide: Fix udma timings of pdc202xx_old controllers

[Sergei Shtylyov]

Hello.

Jung-Ik (John) Lee wrote:

> > > From: John(Jung-Ik) Lee <jilee@xxxxxxxxxx>

> > > Fix udma timings of pdc202xx_old controllers.
> > > MB=1, MC=1 (0x20, 0x01) for all UDMA modes of pdc2026{57}.

   The patch should be broken in two as it's for 2 different subsystems.

> > On what documentation is this based ?

> I have two documents, 20265, and 20267, and both need to set to the
> same single value for all UDMA modes.

> Doc 1:
>   PDC20265 Bus Mastering Ultra DMA PCI –ATA/ATAPI Controller
> Specification Rev 2.0
>   #7.17.2, Ultra DMA Data Transfer Speed list
>     For all Ultra DMA mode, MB, MC = 01h, 01h

> Doc 2:
>   PDC20267 Bus Mastering Ultra DMA PCI –ATA/ATAPI Controller
> Specification Rev 2.0
>   #7.17.2, Ultra DMA Data Transfer Speed list
>     For all Ultra DMA mode, MB, MC = 01h, 01h

> Are there other pdc202xx old controllers that are different?

   There are PDC20262 and PDC20246. We should ask Bart -- he probably has 
the documatation for them...

> -John

> > Alan

WBR, Sergei

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