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Re: USB OHCI device port on Alchemy

To: Linux MIPS mailing list <linux-mips@linux-mips.org>
Subject: Re: USB OHCI device port on Alchemy
From: Brad Parker <brad@heeltoe.com>
Date: Fri, 09 May 2003 09:37:14 -0400
Cc: baitisj@evolution.com
In-reply-to: Message from Pete Popov <ppopov@mvista.com> of "08 May 2003 10:40:29 PDT." <1052415629.558.91.camel@zeus.mvista.com>
Organization: Heeltoe Consulting
Original-recipient: rfc822;linux-mips@linux-mips.org
Sender: linux-mips-bounce@linux-mips.org
>On Wed, 2003-05-07 at 20:31, Jeff Baitis wrote:
>> Out of curiousity:
>> 
>> Has anyone played with the AU1X00 USB device port yet? If not, what would yo
>u
>> guys suggest that the AU1X00 appear as? USB over Ethernet? Or maybe a simple
>> dummy device that will perform bulk transfers?

I'm surprised no one has mentioned all the bugs :-)

Just so you know, the function side controller (i.e. "device") on the
au1100 is/was seriously buggy.  The folks at AMD are (or were) working
on a fix.  It was possible to get it to work, but it was very painful.

I don't remember the details of the chip revs, but as I recall all of
the au1100 parts which had been released as of the end of last year had
these bugs.

[fyi: the folks at Belcarra have done a lot of work on this problem and
know it well]

The ohci controller (i.e. "host") works fine, as far as I know, for all
modes (interrupt, bulk, isochronous).

-brad

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