From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <pku.leo@gmail.com>
Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.229])
	by ozlabs.org (Postfix) with ESMTP id 3626CDDD01
	for <linuxppc-dev@ozlabs.org>; Fri, 27 Feb 2009 20:46:30 +1100 (EST)
Received: by rv-out-0506.google.com with SMTP id l9so990477rvb.9
	for <linuxppc-dev@ozlabs.org>; Fri, 27 Feb 2009 01:46:29 -0800 (PST)
MIME-Version: 1.0
Sender: pku.leo@gmail.com
In-Reply-To: <1c641bc80902260522j45073db8h4da0b0c8f3440e00@mail.gmail.com>
References: <1c641bc80902251151v5a4a5e15g13f6711510acb7ee@mail.gmail.com>
	<2a27d3730902252243i6e0e65f6te78831cfcbae823b@mail.gmail.com>
	<1c641bc80902260522j45073db8h4da0b0c8f3440e00@mail.gmail.com>
Date: Fri, 27 Feb 2009 17:46:28 +0800
Message-ID: <2a27d3730902270146t59c2164ct61fd4a97eb3cb3dc@mail.gmail.com>
Subject: Re: MPC8313E-RDB and USB OTG
From: Li Yang <leoli@freescale.com>
To: Michael Bergandi <mbergandi@gmail.com>
Content-Type: text/plain; charset=UTF-8
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>
List-Id: Linux on PowerPC Developers Mail List <linuxppc-dev.ozlabs.org>
List-Unsubscribe: <https://ozlabs.org/mailman/options/linuxppc-dev>,
	<mailto:linuxppc-dev-request@ozlabs.org?subject=unsubscribe>
List-Archive: <http://ozlabs.org/pipermail/linuxppc-dev>
List-Post: <mailto:linuxppc-dev@ozlabs.org>
List-Help: <mailto:linuxppc-dev-request@ozlabs.org?subject=help>
List-Subscribe: <https://ozlabs.org/mailman/listinfo/linuxppc-dev>,
	<mailto:linuxppc-dev-request@ozlabs.org?subject=subscribe>

On Thu, Feb 26, 2009 at 9:22 PM, Michael Bergandi <mbergandi@gmail.com> wrote:
> Leo, sorry for sending this twice. Forgot to cc the list.
>
>> > I am hoping someone can shed some light on the state of the USB support
>> > in
>> > the
>> > 2.6.28 kernel for USB OTG on the MPC8313E RDB. The configuration options
>> > are
>> > a bit different than the ones from the provided LTIB kernel--- for
>> > obvious
>> > reasons---
>> > and I am trying to figure out how to get OTG working in this version of
>> > the
>> > kernel
>> > on my board.
>>
>> USB OTG support for Freescale USB has not been included in mainline.
>> So you need to bring the OTG code up-to-date, or stay with the LTIB
>> kernel.
>>
>> - Leo
>
> Thanks Leo. I will look into getting the OTG code included.
>
> Do you have a general outline of what would need to be done to it?
>
> Any potential trouble spots?

The current code requires OTG driver loaded before host and udc
driver, otherwise won't work correctly.  It's better to make them work
correctly no matter what loading sequence.

- Leo