From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750734AbWFEWaH (ORCPT ); Mon, 5 Jun 2006 18:30:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750756AbWFEWaG (ORCPT ); Mon, 5 Jun 2006 18:30:06 -0400 Received: from amdext3.amd.com ([139.95.251.6]:50097 "EHLO amdext3.amd.com") by vger.kernel.org with ESMTP id S1750734AbWFEWaE (ORCPT ); Mon, 5 Jun 2006 18:30:04 -0400 X-Server-Uuid: 519AC16A-9632-469E-B354-112C592D09E8 Date: Mon, 5 Jun 2006 16:29:08 -0600 From: "Jordan Crouse" To: "Pierre Ossman" cc: linux-kernel@vger.kernel.org, rmk+lkml@arm.linux.org.uk Subject: Re: 2GB MMC/SD cards Message-ID: <20060605222908.GC4996@cosmic.amd.com> References: <4481FB80.40709@drzeus.cx> MIME-Version: 1.0 In-Reply-To: <4481FB80.40709@drzeus.cx> User-Agent: Mutt/1.5.11 X-OriginalArrivalTime: 05 Jun 2006 22:29:08.0157 (UTC) FILETIME=[75CD06D0:01C688EF] X-WSS-ID: 689A6FB927G5908829-01-01 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 03/06/06 23:13 +0200, "Pierre Ossman" wrote: > Matt Reimer wrote: > > That's what I thought until I looked closer at the Sandisk specs. Until > we can see what the official specs say, we won't really know what the > correct behaviour is. The Nokia boys working on the 770 have a copy. > Perhaps someone here knows how to get in touch with one of them that can > have a look? I'm not 100% sure what the community stance is on using the simplified specs. I do believe the answer lies definitively within, but I'll refrain from quoting it to avoid any legal complaints. For the longest time, my gut feeling has been that 512 byte writes were always accepted - but since all of our 2G and 4G cards support WRITE_BL_PARTIAL, we haven't had a chance to prove the argument one way or the other. We first heard about very large card issues from one of our customers, and we haven't heard any more problems since we gave them a patch to force the sector size on all SD/MMC cards to 512 bytes. Thats just anecdotal evidence, but it is food for thought. Jordan -- Jordan Crouse Senior Linux Engineer AMD - Personal Connectivity Solutions Group