linux-mips
[Top] [All Lists]

Re: au1x00 usb device status

To: Rodolfo Giometti <giometti@linux.it>
Subject: Re: au1x00 usb device status
From: Pete Popov <ppopov@embeddedalley.com>
Date: Thu, 06 Oct 2005 09:41:14 -0700
Cc: "'linux-mips@linux-mips.org'" <linux-mips@linux-mips.org>
In-reply-to: <20051006154702.GA11086@gundam.enneenne.com>
Organization: Embedded Alley Solutions, Inc
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20051006073345.GB17583@gundam.enneenne.com> <1128612772.9971.34.camel@localhost.localdomain> <20051006154702.GA11086@gundam.enneenne.com>
Reply-to: ppopov@embeddedalley.com
Sender: linux-mips-bounce@linux-mips.org
On Thu, 2005-10-06 at 17:47 +0200, Rodolfo Giometti wrote:
> On Thu, Oct 06, 2005 at 08:32:52AM -0700, Pete Popov wrote:
> > USB Host should be working fine. USB Gadget on the Au1000,1100,1500,1550
> > just won't happen due to hw limitations. USB host and gadget on the 1200
> 
> Thanks for your answer!
> 
> Can you please explain to me (in brief :) which hw limitations are you
> talking about? Do you mean that usb device support in Linux cannot be
> implemented, or just that this can be done but with some restriction?

Timing issues with the Au1x00 (not the au1200) make the Linux gadget
implementation extremely difficult to support. If you don't service the
usb interrupt within a certain amount of time, you lose the status and
the gadget loses its state.

Pete


<Prev in Thread] Current Thread [Next in Thread>