Return-path: Received: from mail201.messagelabs.com ([216.82.254.211]:21844 "EHLO mail201.messagelabs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755297AbZFAJxe (ORCPT ); Mon, 1 Jun 2009 05:53:34 -0400 Message-ID: <4A23A51C.2000608@digi.com> Date: Mon, 1 Jun 2009 11:53:32 +0200 From: Luis Galdos MIME-Version: 1.0 To: Dan Williams CC: Andrew Morton , "linux-kernel@vger.kernel.org" , "linux-wireless@vger.kernel.org" , Pierre Ossman Subject: Re: [LIBERTAS-SDIO] Support for single transfer blocks? References: <4A08392F.70108@digi.com> <20090512231150.bc0c65c6.akpm@linux-foundation.org> <1242223408.11182.34.camel@localhost.localdomain> In-Reply-To: <1242223408.11182.34.camel@localhost.localdomain> Content-Type: text/plain; charset="ISO-8859-15"; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: Dan Williams wrote: > On Tue, 2009-05-12 at 23:11 -0700, Andrew Morton wrote: >> Let's Cc the wireless development list. > > And lets CC the MMC subsystem maintainer and original author of libertas_sdio too, so > we can get an informed opinion :) > > What firmware version are you using? The installed firmware version is 9.70.3p24 (downloaded from the Marvell's website). > What SDIO controller is this? Has this controller been validated by Marvell for use > with the 8686? (not that that is required or anything, just curious). The uC is from Digi (NS9215) and its SDIO-port hasn't been validated by Marvell. > All the information I have (up to firmware V10) references a block size of 32 bytes. > The main firmware is transferred in 32-byte blocks using CMD 53, with a maximum number > of 16 blocks transferred in a single CMD 53 write depending on how much data the helper > firmware can accept in single write. The available vendor drivers also use a 32-byte > block size. That's right. I only was surprised that the SD8686 accepts data blocks of 512 bytes in a single transfer too. This is just nice for SDIO-ports that only support single blocks :) (like the NS9215). Anyway, Pierre has informed me that the SD8686 has need of multiple blocks support, and the NS9215 doesn't. So, the problem is the controller. > Dan Thanks and sorry for the delayed answer (I was on vacations), -- Luis Galdos