Messages in this thread | | | From | "Jung-Ik (John) Lee" <> | Date | Thu, 17 Sep 2009 16:54:09 -0700 | Subject | Re: [PATCH] libata:ide: Fix udma timings of pdc202xx_old controllers |
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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
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