From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 27 Sep 2001 18:24:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 27 Sep 2001 18:24:02 -0400 Received: from mail.pha.ha-vel.cz ([195.39.72.3]:22025 "HELO mail.pha.ha-vel.cz") by vger.kernel.org with SMTP id ; Thu, 27 Sep 2001 18:23:45 -0400 Date: Fri, 28 Sep 2001 00:24:10 +0200 From: Vojtech Pavlik To: Dan Hollis Cc: linux-kernel@vger.kernel.org Subject: Re: AMD viper chipset and UDMA100 Message-ID: <20010928002410.A18608@suse.cz> In-Reply-To: <20010927235946.B18423@suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from goemon@anime.net on Thu, Sep 27, 2001 at 03:16:18PM -0700 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 27, 2001 at 03:16:18PM -0700, Dan Hollis wrote: > On Thu, 27 Sep 2001, Vojtech Pavlik wrote: > > On Thu, Sep 27, 2001 at 02:26:50PM -0700, Sean Swallow wrote: > > > I just got a tyan tiger w/ the AMD Viper chipset on it. For some reason > > > Linux will only set the onboard (AMD viper) chains to UDMA33. > > > I'm using linux 2.4.9, and I have also tried 2.4.10. Is there a limitation > > > to the AMD Viper driver? > > > PS. The cables (2) are BRAND new ata100 cables. > > The Viper can do UDMA66 max. At least it's doing it for me quite well. > > If he's got the Tyan Tiger i'm thinking of, it's the Tyan S2460 with > AMD766 southbridge. Tyan says it will do U100: > http://www.tyan.com/products/html/tigermp.html This southbridge is called Viper Plus as far as I know. In the past, I've written a driver for this, but it didn't make it into the kernel, because Andre also had his version. > AMD does too: > http://www.amd.com/us-en/Processors/TechnicalResources/0,,30_182_873,00.html > > And I've got the same problem with my S2460: > > Uniform Multi-Platform E-IDE driver Revision: 6.31 > ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx > AMD7411: IDE controller on PCI bus 00 dev 39 > AMD7411: chipset revision 1 > AMD7411: not 100% native mode: will probe irqs later > AMD7411: disabling single-word DMA support (revision < C4) > ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hda:DMA, hdb:pio > ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:DMA, hdd:pio > hda: 20010816 sectors (10246 MB) w/2048KiB Cache, CHS=1245/255/63, UDMA(33) > hdc: 160086528 sectors (81964 MB) w/2048KiB Cache, CHS=158816/16/63, UDMA(33) > > But these drives will do U66/U100: > > And yes, I *DO* have the proper cables. These same drives connected to a > Promise 20267 or a VIA KT133 with the same cables will do U66/U100 > perfectly. Perhaps I could dig up my code and you can give it a test. Would you be interested? -- Vojtech Pavlik SuSE Labs