From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43)
	id 1JJyiR-0001pW-06
	for qemu-devel@nongnu.org; Tue, 29 Jan 2008 17:14:03 -0500
Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43)
	id 1JJyiO-0001oT-Gv
	for qemu-devel@nongnu.org; Tue, 29 Jan 2008 17:14:01 -0500
Received: from [199.232.76.173] (helo=monty-python.gnu.org)
	by lists.gnu.org with esmtp (Exim 4.43) id 1JJyiO-0001oP-Df
	for qemu-devel@nongnu.org; Tue, 29 Jan 2008 17:14:00 -0500
Received: from fg-out-1718.google.com ([72.14.220.157])
	by monty-python.gnu.org with esmtp (Exim 4.60)
	(envelope-from <dor.laor@gmail.com>) id 1JJyiO-00021V-Gc
	for qemu-devel@nongnu.org; Tue, 29 Jan 2008 17:14:00 -0500
Received: by fg-out-1718.google.com with SMTP id e12so2296554fga.8
	for <qemu-devel@nongnu.org>; Tue, 29 Jan 2008 14:13:58 -0800 (PST)
Subject: Re: [Qemu-devel] PCI device emulation in qemu
In-Reply-To: <4c8f91e80801291343y5e8d496ai6c4689644a0c3fd8@mail.gmail.com>
References: <4c8f91e80801291343y5e8d496ai6c4689644a0c3fd8@mail.gmail.com>
Content-Type: text/plain
Date: Wed, 30 Jan 2008 00:12:46 +0200
Message-Id: <1201644766.20527.8.camel@localhost.localdomain>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
From: Dor Laor <dor.laor@gmail.com>
Reply-To: dor.laor@qumranet.com, qemu-devel@nongnu.org
List-Id: qemu-devel.nongnu.org
List-Unsubscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.gnu.org/pipermail/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <http://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: qemu-devel@nongnu.org


On Tue, 2008-01-29 at 13:43 -0800, Sarah A Sharp wrote:
> Greetings,
> 
> I'm developing a USB host controller driver for hardware that isn't
> available yet.  Is there a way to emulate a PCI host controller for
> the Linux host controller driver to talk to?  I looked at the USB
> emulation section, but it seemed to be about emulating USB devices,
> not USB host controllers.
> 

Actually both uhci, ohci and ehci are emulated.

> Also, is the USB emulation in qemu using libusb or usbfs when running
> under a Linux host OS?  I noticed the FAQ mentions asynchronous USB
> transfers are not possible, which lead me to believe that qemu is
> using libusb.
> 

Usbfs is used.

> Thanks,
> 
> Sarah Sharp
> 
>