From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26727 invoked by alias); 8 Mar 2006 22:31:25 -0000 Received: (qmail 26718 invoked by uid 22791); 8 Mar 2006 22:31:25 -0000 X-Spam-Check-By: sourceware.org Received: from zproxy.gmail.com (HELO zproxy.gmail.com) (64.233.162.203) by sourceware.org (qpsmtpd/0.31) with ESMTP; Wed, 08 Mar 2006 22:31:24 +0000 Received: by zproxy.gmail.com with SMTP id l8so310121nzf for ; Wed, 08 Mar 2006 14:31:22 -0800 (PST) Received: by 10.36.224.80 with SMTP id w80mr2533922nzg; Wed, 08 Mar 2006 14:31:22 -0800 (PST) Received: by 10.36.33.4 with HTTP; Wed, 8 Mar 2006 14:31:22 -0800 (PST) Message-ID: <6f506bf60603081431v1de28540vfc828c2bc245f6cc@mail.gmail.com> Date: Wed, 08 Mar 2006 22:31:00 -0000 From: "Grant Mills" To: "Bart Veer" , gmills@ucsd.edu, ecos-discuss@ecos.sourceware.org In-Reply-To: <20060308221449.GG19406@lunn.ch> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <6f506bf60603081121ga5a3c2cs925c9ad4362198ad@mail.gmail.com> <20060308220707.A181ADC8054@snape.ecoscentric.com> <20060308221449.GG19406@lunn.ch> X-IsSubscribed: yes Mailing-List: contact ecos-discuss-help@ecos.sourceware.org; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: ecos-discuss-owner@ecos.sourceware.org Subject: Re: [ECOS] Modifying RedBoot to support multiple flash devices X-SW-Source: 2006-03/txt/msg00093.txt.bz2 On 3/8/06, Andrew Lunn wrote: > > For a more general solution you'll want the V2 branch in anoncvs. In > > particular the V2 version of the AMD flash driver has an option for > > CFI support, i.e. the device parameters will be determined at run-time > > and you can bounce around between devices within a family all you > > like. If you want to switch between families, e.g. between > > AMD-compatible and Intel Strata flash, then in theory the V2 code > > should allow for that as well. However that is not a common scenario. > > Having two different families works well with the v2 code. We have a > board with either ST or Intel Strata devices. > > Andrew > > Specifically, we will need to go between Intel Strata and AMD/Spansion Mirror Bit. I'd prefer a CFI solution as well since that provides a migration path for larger parts without code changes. However, look out for the Intel 1Gb and 512Mb P30 Strata Flash. They are multi-die devices and will require multiple chip selects for the 1Gb and multiple CFI entries for each die. We aren't looking at either of these chips (yet.) on the RedBoot platform, but we've used them in others. Thanks for all the help. -- Grant Mills gmills@ucsd.edu -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss