From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by ozlabs.org (Postfix) with ESMTP id 92471DDEE9 for ; Wed, 4 Jun 2008 20:47:59 +1000 (EST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1K3qX6-0003DT-F6 for linuxppc-embedded@ozlabs.org; Wed, 04 Jun 2008 03:47:56 -0700 Message-ID: <17643915.post@talk.nabble.com> Date: Wed, 4 Jun 2008 03:47:56 -0700 (PDT) From: gforgcc To: linuxppc-embedded@ozlabs.org Subject: Re: Help on MPC82XX USB Host controller Development using m82xx-hcd. In-Reply-To: <200806041229.32995.laurentp@cse-semaphore.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii References: <16304553.post@talk.nabble.com> <200803270956.12203.laurentp@cse-semaphore.com> <17643409.post@talk.nabble.com> <200806041229.32995.laurentp@cse-semaphore.com> List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Laurent Pinchart-4 wrote: > > > The good news is that Anton Vorontsov wrote and posted a FHCI driver for > QE-based parts on the linux-ppc mailing list (search the archive for > "[PATCH] > Freescale QUICC Engine USB Host Controller"). The driver can be easily > modified to work with CPM2-based parts. > > The bad news is that, from my experience with the CPM2, the controller is > almost unusable. It eats around 40% CPU time on my MPC8248 system, and > requires software help to generate SOF tokens, which results in bad SOF > tokens being sent on the bus. Most USB disks don't seem to care, but all > the > USB Bluetooth host controllers I've tested crashed. > > We will be looking for an external USB host controller (or even another > CPU) > for the next revision of the design. > > oh.. woww.. great info... :) :) thanks a million.. Right now I am just trying to get a USB -WiFi adapter working with EP8248 board. Did you have a go at any USB WiFi devices? Yes hogging processor for 40% of time is a big issue...I guess at this moment I don't have any other options like respining or using 83xx processors so I would like to give a try with this once. Do you have a patch for getting the CPM2 posted any where? If not can you send me the patch. Thanks and Regards Naren. -- View this message in context: http://www.nabble.com/Help-on-MPC82XX-USB-Host-controller-Development-using-m82xx-hcd.-tp16304553p17643915.html Sent from the linuxppc-embedded mailing list archive at Nabble.com.