From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Lord Subject: Re: [PATCH 0/2]ACPI support for SATA/PATA Date: Thu, 27 Jul 2006 14:03:48 -0400 Message-ID: <44C90004.4030400@rtr.ca> References: <1153899345.4957.59.camel@forrest26.sh.intel.com> <44C786D8.5060801@rtr.ca> <1153964697.4957.67.camel@forrest26.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from rtr.ca ([64.26.128.89]:21913 "EHLO mail.rtr.ca") by vger.kernel.org with ESMTP id S1750984AbWG0SDu (ORCPT ); Thu, 27 Jul 2006 14:03:50 -0400 In-Reply-To: <1153964697.4957.67.camel@forrest26.sh.intel.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: "zhao, forrest" Cc: jgarzik@pobox.com, rdunlap@xenotime.net, htejun@gmail.com, linux-ide@vger.kernel.org zhao, forrest wrote: > On Wed, 2006-07-26 at 11:14 -0400, Mark Lord wrote: >> zhao, forrest wrote: >>> Hello, all >>> >>> In ACPI spec 3.0, section 9.9 defines 4 objects for PATA/SATA: >>> >>> _GTF is for both PATA and SATA, which is used to return ATA task file >>> needed to re-init the drive; >>> _SDD is SATA-only object, which is used to inform the platform of the >>> type of device attached to a port; >>> _GTM and _STM are PATA-only objects, which are used to get/set PATA >>> timing information(i.e. PIO and DMA speed). >> It seems to be quite common for ICH*M notebooks to use the SATA ports >> to attach PATA drives with PATA->SATA bridge chips in the middle. >> >> In this case, one would expect the _GTM and _STM objects to be necessary, >> even though Linux thinks it's a SATA situation. >> > > Hi Mark, > > I re-read the section 9.9 of ACPI spec 3.0, but didn't find any > description about how to deal with "PATA->SATA bridge". Is this version > of APCI spec outdated? > Would you please point me to spec(or document), which has the > description of how to deal with "PATA->SATA bridge"? I don't have any documents, just machines that implement it. Cheers