From mboxrd@z Thu Jan 1 00:00:00 1970 From: Richard Subject: Re: Marvel PMP SATA controller Date: Thu, 30 Sep 2010 15:03:33 +0100 Message-ID: <4CA498B5.6090503@gmail.com> References: <4CA2E33B.70001@gmail.com> <4CA399FD.6030904@teksavvy.com> <4CA3A27B.3030906@gmail.com> <4CA4932D.6040501@teksavvy.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-wy0-f174.google.com ([74.125.82.174]:64975 "EHLO mail-wy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752905Ab0I3ODh (ORCPT ); Thu, 30 Sep 2010 10:03:37 -0400 Received: by wyb28 with SMTP id 28so1880032wyb.19 for ; Thu, 30 Sep 2010 07:03:36 -0700 (PDT) In-Reply-To: <4CA4932D.6040501@teksavvy.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Mark Lord Cc: linux-ide@vger.kernel.org On 30/09/10 14:39, Mark Lord wrote: > On 10-09-29 04:32 PM, Richard wrote: >> On 29/09/10 20:56, Mark Lord wrote: > >>> What are you trying to do? >> Hi Mark, >> >> Its an embedded device whereby the one HDD I have does not work with >> the Marvel PMP. I have the command to send to the PMP controller but >> I am not an officianado with linux SATA(the code I have is from >> VxWorks) The drive is confirmed working, but the PMP chip does not >> default to SATA Generation 1, and this HDD is a bit dumb to figure it >> out :) - so I have to force the PMP controller to Gen1 mode. >> (I have tons of drives that work just fine, its just this ONE Maxtor >> drive that is being a pain) >> >> The short - I need to write a command to the SATA controller before >> this HDD can be recognised. > .. > > Does the existing libata parameter take care of it for you? > > linux/Documentation/kernel-parameters.txt: > eg. libata.force=[ID:]1.5" ## replace [ID:] with port[.device] for > the PMP and/or HD > Unfortunately not.. which is why I asked how to write commands directly on to the SATA bus from kernel space. Richard