From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 13 Feb 2007 07:52:58 +0000 (GMT) Received: from roasted.cubic.org ([193.108.181.130]:21670 "EHLO roasted.cubic.org") by ftp.linux-mips.org with ESMTP id S20038718AbXBMHwu (ORCPT ); Tue, 13 Feb 2007 07:52:50 +0000 Received: from c145138.adsl.hansenet.de ([213.39.145.138] helo=cubic.org) by roasted.cubic.org with asmtp (TLSv1:RC4-MD5:128) (Exim 3.36 #1) id 1HGsPw-0005gA-00 for linux-mips@linux-mips.org; Tue, 13 Feb 2007 08:49:36 +0100 Message-ID: <45D16D8B.40401@cubic.org> Date: Tue, 13 Feb 2007 08:49:31 +0100 From: Michael Stickel User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.2.1) Gecko/20030225 X-Accept-Language: en-us, en MIME-Version: 1.0 To: linux-mips@linux-mips.org Subject: Re: AU1100 Ethernet problems References: <45D154C2.9030809@tin.it> In-Reply-To: <45D154C2.9030809@tin.it> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 14057 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: michael@cubic.org Precedence: bulk X-list: linux-mips Lucio Dona' wrote: > When the boards are powered up without Ethernet cable plugged-in, and > the Ethernet is initialized, it seems that the system gets a lot of > 'rx interrupts' and stays almost all the time inside the Ethernet rx > interrupt service routine. > This horribly slows down everything and causes the watchdog to come up > resetting the board. > > Tried to make some debugging, but don't understand why there are all > those interrupts. > > If the system is powered up with the Ethernet cable connected to a > simple hub (hub only, no other computers connected to the net) the > problem does not occur. > > I have this problem on about 10% boards. > The design is based on AMD Syrah reference schematics, the kernel is > 2.4.21-pre4. Searching with oscilloscope there is no apparent > 'hardware' difference between a 'bad' board and a good one. If this is on 10% of the boards I would say it is a production problem. What PHY do you use and is it properly reseted? Is there any soldering problem with the PHY. Does it have a ground pad under the case and is this pad well soldered? Regards, Michael