lkml.org 
[lkml]   [2009]   [Sep]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] libata:ide: Fix udma timings of pdc202xx_old controllers
On Thu, Sep 17, 2009 at 4:23 PM, Alan Cox <alan@lxorguk.ukuu.org.uk> wrote:
> On Thu, 17 Sep 2009 16:02:31 -0700
> "Jung-Ik (John) Lee" <jilee@google.com> wrote:
>
>> From: John(Jung-Ik) Lee <jilee@google.com>
>>
>> Fix udma timings of pdc202xx_old controllers.
>> MB=1, MC=1 (0x20, 0x01) for all UDMA modes of pdc2026{57}.
>
> 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?

-John

>
> Alan
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-09-18 01:57    [W:0.283 / U:0.052 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site