From mboxrd@z Thu Jan 1 00:00:00 1970 From: "zhao, forrest" Subject: Re: [PATCH 0/2]ACPI support for SATA/PATA Date: Thu, 27 Jul 2006 09:44:57 +0800 Message-ID: <1153964697.4957.67.camel@forrest26.sh.intel.com> References: <1153899345.4957.59.camel@forrest26.sh.intel.com> <44C786D8.5060801@rtr.ca> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mga01.intel.com ([192.55.52.88]:56230 "EHLO fmsmga101-1.fm.intel.com") by vger.kernel.org with ESMTP id S1751856AbWG0B53 (ORCPT ); Wed, 26 Jul 2006 21:57:29 -0400 In-Reply-To: <44C786D8.5060801@rtr.ca> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mark Lord Cc: jgarzik@pobox.com, rdunlap@xenotime.net, htejun@gmail.com, linux-ide@vger.kernel.org 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 Is this version of APCI spec outdated?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"? Thanks, Forrest