From owner-freebsd-current@FreeBSD.ORG  Mon Apr 26 18:27:01 2004
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 7313516A4CE
	for <current@freebsd.org>; Mon, 26 Apr 2004 18:27:01 -0700 (PDT)
Received: from carver.gumbysoft.com (carver.gumbysoft.com [66.220.23.50])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 11D3543D5A
	for <current@freebsd.org>; Mon, 26 Apr 2004 18:27:01 -0700 (PDT)
	(envelope-from dwhite@gumbysoft.com)
Received: by carver.gumbysoft.com (Postfix, from userid 1000)
	id F02E872DF0; Mon, 26 Apr 2004 18:27:00 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1])
	by carver.gumbysoft.com (Postfix) with ESMTP
	id ED74572DBF; Mon, 26 Apr 2004 18:27:00 -0700 (PDT)
Date: Mon, 26 Apr 2004 18:27:00 -0700 (PDT)
From: Doug White <dwhite@gumbysoft.com>
To: Julian Elischer <julian@elischer.org>
In-Reply-To: <Pine.BSF.4.21.0404211117230.31770-100000@InterJet.elischer.org>
Message-ID: <20040426182459.D27442@carver.gumbysoft.com>
References: <Pine.BSF.4.21.0404211117230.31770-100000@InterJet.elischer.org>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
cc: "Vyacheslav I. Ivanchenko" <ivi@dhs.net.ru>
cc: current@freebsd.org
cc: Nate Lawson <nate@root.org>
Subject: Re: Trouble with EHCI controller and USB Flash Disk.
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 27 Apr 2004 01:27:01 -0000

On Wed, 21 Apr 2004, Julian Elischer wrote:

> > > I have problems with mine USB2.0 Mobile Disk III and EHCI controller.
> > > (http://www.twinmos.com/flash/flash_p_usb20_mobile3.htm)
> > >
> > > When I try to use EHCI controller, my system finds out
> > > the device /dev/da0, but does not find out the
> > > device /dev/da0s1.
> > >
> > > With UHCI controller no problem.
> >
> > Since it works with UHCI, it's likely an EHCI problem.  Unfortunately, I
> > don't know much about EHCI so I'm moving this to -current.
>
> The ehci driver has quite a few problems.
> It workd in some cases but not in others.
> I have not yet isolated what the defining factor is.

I think EHCI has a tendency to drop transactions. I got umass really
confused a few weeks back by attaching one usb key to ehci and a low key
to uhci and trying to do stuff on both keys at once.  The transaction
sequence #s got off-by-one and never recovered (due to a bug in umass),
but the txn shouldn't have disappeared in the first place.

-- 
Doug White                    |  FreeBSD: The Power to Serve
dwhite@gumbysoft.com          |  www.FreeBSD.org