Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750861AbVIWJru (ORCPT ); Fri, 23 Sep 2005 05:47:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750862AbVIWJru (ORCPT ); Fri, 23 Sep 2005 05:47:50 -0400 Received: from moutvdom.kundenserver.de ([212.227.126.249]:26049 "EHLO moutvdomng.kundenserver.de") by vger.kernel.org with ESMTP id S1750860AbVIWJrt (ORCPT ); Fri, 23 Sep 2005 05:47:49 -0400 Message-ID: <4333CF4C.2000306@anagramm.de> Date: Fri, 23 Sep 2005 11:47:56 +0200 From: Clemens Koller User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: David Sanchez CC: linux-kernel@vger.kernel.org Subject: Re: How to Force PIO mode on sata promise (Linux 2.6.10) References: <17AB476A04B7C842887E0EB1F268111E026FC5@xpserver.intra.lexbox.org> In-Reply-To: <17AB476A04B7C842887E0EB1F268111E026FC5@xpserver.intra.lexbox.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1546 Lines: 42 Hello, David! David Sanchez wrote: > I've reduced the UDMA level step by step until the problem seems disappeared. > Finally with UDMA/25 I don't detect error after 1000 copies. I consider that this solution corrects the symptom but not the cause... Hmm, no luck for you, today? Have you possibilities to check the signal integrity in your design? Did you play some of the electrical engineering tricks to see if things are changing? (change some terminations, temperature, voltages) > My embedded system: > * AMD Development Board AU1550 (mips32) + hdd connected to the pata port of the Promise PDC20579 controller. > * Kernel2.6.10 + libata patch + busybox 1.0 Well, what about getting a datasheet of the PDC, one of the latest kernels and start to debug that thing down to the silicon? There is a person called Ed Huang (Sales and Marketing Div.) at Promise in Taiwan where we got our datasheets and reference designs for our embedded project. Unfortunately, you need to sign a NDA. But beside that, the support is pretty okay. (I just send you the contact in private email). Best greets, -- Clemens Koller _______________________________ R&D Imaging Devices Anagramm GmbH Rupert-Mayer-Str. 45/1 81379 Muenchen Germany http://www.anagramm.de Phone: +49-89-741518-50 Fax: +49-89-741518-19 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/