From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailrelay003.isp.belgacom.be (mailrelay003.isp.belgacom.be [195.238.6.53]) by ozlabs.org (Postfix) with ESMTP id 474B8DDEA3 for ; Fri, 30 Nov 2007 23:30:31 +1100 (EST) From: Laurent Pinchart To: Vitaly Bordug Subject: Re: CPM2 USB host driver Date: Fri, 30 Nov 2007 13:30:18 +0100 References: <200711301145.52926.laurentp@cse-semaphore.com> <20071130141638.4e00258d@kernel.crashing.org> In-Reply-To: <20071130141638.4e00258d@kernel.crashing.org> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2699371.bMhLTZ6MzH"; protocol="application/pgp-signature"; micalg=pgp-sha1 Message-Id: <200711301330.25100.laurentp@cse-semaphore.com> Cc: linuxppc-dev@ozlabs.org, mike@compulab.co.il List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --nextPart2699371.bMhLTZ6MzH Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Friday 30 November 2007 12:16, Vitaly Bordug wrote: > On Fri, 30 Nov 2007 11:45:49 +0100 > > Laurent Pinchart wrote: > > Hi everybody, > > > > Linux USB host support for the CPM, CPM2 and CPM2 pro is far from > > complete. Many people showed interest on this list (and on > > linuxppc-embedded) in the past, but nobody managed to complete a > > driver and get it merged. > > that is mainly because of its semi-software nature. However, any approach > would be helpful I beleive. The CPM/CPM2 USB host controller does indeed put some pressure on the CPU. = The=20 PowerQuick III family is much better in that respect as its USB host=20 controller is EHCI compliant. We plan to use an external USB host controller when we will redesign the=20 hardware. My goal in writting a CPM2 USB host driver is mainly to enable th= e=20 hardware team to perform EMC testing on the USB interface. I don't expect i= t=20 to be shipped to any client, but I'd still like to get it merged (if I=20 complete the project) as I don't like throwing away useful code. > > As I need USB host support on my MPC8248 (CPM2), I decided to scratch > > the itch and try to get a working driver that could be merged > > upstream. This mail describes my plans to make sure the code I write > > will be useful for other people. > > > > The driver will be based on the cpm2usb project > > (http://cpm2usb.sf.net/). As I don't own any CPM1-based platform, I > > will convert the driver to use the CPM2 transaction-level interface, > > thus making it incompatible with the CPM1. CPM1 support could be > > added back later. There is no planned release date, and more urgent > > projects could put this development on hold. > > > > Comments are welcome (and contributions too, especially in the form > > of a working driver :-)). > > I may have some WIP material left, will try to dig it out... Should I wait ? Best regards, =2D-=20 Laurent Pinchart CSE Semaphore Belgium Chauss=E9e de Bruxelles, 732A B-1410 Waterloo Belgium T +32 (2) 387 42 59 =46 +32 (2) 387 42 75 --nextPart2699371.bMhLTZ6MzH Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQBHUAJh8y9gWxC9vpcRAvdxAKDhKtpeJn8sPgN0RCc8JZCXt6QCtACg3RAL qCgCKLxGfedq7KYPx38AY/E= =cdTj -----END PGP SIGNATURE----- --nextPart2699371.bMhLTZ6MzH--