From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [PATCH] ahci: Add support for Promise PDC42819 Date: Mon, 27 Oct 2008 23:57:32 -0400 Message-ID: <49068DAC.605@garzik.org> References: <65a6ef750810222008o139600e3o8d7c7cf50a4e4ea0@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <65a6ef750810222008o139600e3o8d7c7cf50a4e4ea0@mail.gmail.com> Sender: linux-scsi-owner@vger.kernel.org To: Mark Nelson Cc: linux-ide@vger.kernel.org, alan@lxorguk.ukuu.org.uk, mikpe@it.uu.se, linux-scsi@vger.kernel.org List-Id: linux-ide@vger.kernel.org Mark Nelson wrote: > Add an appropriate entry for the Promise PDC42819 controller. It has an > AHCI mode and so far works correctly with board_ahci. > > This chip is found on Promise's FastTrak TX2650 (2 port) and TX4650 (4 port) > software-based RAID cards (for which there is a binary driver, t3sas) and > can be found on some motherboards, for example the MSI K9A2 Platinum, > which calls the chip a Promise T3 controller. > > Although this controller also supports SAS devices, its default bootup mode > is AHCI and the binary driver has to do some magic to get the chip into the > appropriate mode to drive SAS disks. > > Seeing as no documentation is provided by Promise, adding this entry to the > ahci driver allows the controller to be useful to people as a SATA > controller (with no ill effects on the system if a SAS disk is connected - > probing of the port just times out with "link online but device > misclassified"), without having to resort to using the binary driver. Users > who require SAS or the proprietary software raid can get this functionality > using the binary driver. > > Signed-off-by: Mark Nelson > --- > drivers/ata/ahci.c | 3 +++ > 1 file changed, 3 insertions(+) applied