From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergei Shtylyov Subject: Re: [PATCH] libata:ide: Fix udma timings of pdc202xx_old controllers Date: Fri, 18 Sep 2009 15:52:50 +0400 Message-ID: <4AB37492.90407@ru.mvista.com> References: <8b5805ff0909171602v3dc10db9i5920be3a2abf2e04@mail.gmail.com> <20090918002322.54099f94@lxorguk.ukuu.org.uk> <8b5805ff0909171654i515c832bm570db9bd5936b11a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from h155.mvista.com ([63.81.120.155]:32958 "EHLO imap.sh.mvista.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753899AbZIRLuV (ORCPT ); Fri, 18 Sep 2009 07:50:21 -0400 In-Reply-To: <8b5805ff0909171654i515c832bm570db9bd5936b11a@mail.gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "Jung-Ik (John) Lee" Cc: Alan Cox , Bartlomiej Zolnierkiewicz , Jeff Garzik , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Hello. Jung-Ik (John) Lee wrote: >>>From: John(Jung-Ik) Lee >>>Fix udma timings of pdc202xx_old controllers. >>>MB=3D1, MC=3D1 (0x20, 0x01) for all UDMA modes of pdc2026{57}. The patch should be broken in two as it's for 2 different subsystem= s. >>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 =96ATA/ATAPI Controller > Specification Rev 2.0 > #7.17.2, Ultra DMA Data Transfer Speed list > For all Ultra DMA mode, MB, MC =3D 01h, 01h > Doc 2: > PDC20267 Bus Mastering Ultra DMA PCI =96ATA/ATAPI Controller > Specification Rev 2.0 > #7.17.2, Ultra DMA Data Transfer Speed list > For all Ultra DMA mode, MB, MC =3D 01h, 01h > Are there other pdc202xx old controllers that are different? There are PDC20262 and PDC20246. We should ask Bart -- he probably = has=20 the documatation for them... > -John >>Alan WBR, Sergei