From mboxrd@z Thu Jan 1 00:00:00 1970 From: "zhao, forrest" Subject: [PATCH 0/2]ACPI support for SATA/PATA Date: Wed, 26 Jul 2006 15:35:45 +0800 Message-ID: <1153899345.4957.59.camel@forrest26.sh.intel.com> Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com ([134.134.136.20]:56224 "EHLO orsmga101-1.jf.intel.com") by vger.kernel.org with ESMTP id S1030219AbWGZHsQ (ORCPT ); Wed, 26 Jul 2006 03:48:16 -0400 Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: jgarzik@pobox.com, rdunlap@xenotime.net, htejun@gmail.com Cc: linux-ide@vger.kernel.org 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). In this patch set, ata_acpi_exec_tfs() is for getting ATA task file from _GTF and executing them for a given drive; ata_acpi_push_id() is for setting _SDD. NOTE: this patch doesn't include the support for _GTM and _STM because libata defines ->set_piomode(), ->set_dmamode() callbacks for LLDD, which do the same work as _GTM and _STM. So I think it's not necessary to provide redundant functionality by _GTM and _STM. Randy, I'll add your sign-off line after you review the patch. Thanks, Forrest