From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gary Thomas Date: Thu, 12 Jul 2012 07:17:59 -0600 Subject: [U-Boot] Ethernet on PandaBoard In-Reply-To: <20120712131501.GC7993@oliver-linux> References: <4FFD7AE2.8000109@mlbassoc.com> <20120712092018.GA5464@oliver-linux> <20120712093036.GB5464@oliver-linux> <4FFECBBA.9030308@mlbassoc.com> <20120712131501.GC7993@oliver-linux> Message-ID: <4FFECE87.7070301@mlbassoc.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de On 2012-07-12 07:15, Tom Rini wrote: > On Thu, Jul 12, 2012 at 07:06:02AM -0600, Gary Thomas wrote: >> On 2012-07-12 03:30, Tom Rini wrote: >>> On Thu, Jul 12, 2012 at 02:20:18AM -0700, Tom Rini wrote: >>>> On Wed, Jul 11, 2012 at 07:08:50AM -0600, Gary Thomas wrote: >>>> >>>>> I just tried rev 211e47549b668c7cdd8658c0413a272f0d0495d4 (v2012.07-rc1) >>>>> for my PandaBoard. Sadly, this is failing when I try to use the onboard >>>>> ethernet (EHCI USB based) controller: >>>> >>>> Sorry for the late response, at a conference. This is a known problem >>>> and we will either have this fixed soon (Ilya Yanok is working on a >>>> series) or we will build-time disable dcache support on these boards and >>>> fix this properly for the next release. >>>> >>>> In short, some cache clean-ups in ehci-hcd.c exposed other cache >>>> problems on other platforms where our cache size is 64 not 32bytes. >>> >>> I take it back, I forgot omap4 is 32byte cache. With the fix that >>> Tetsuyuki Kobayashi pointed you at (oh, and a Tested-by to that thread >>> if you can), can you please do a little stress testing of USB, to make >>> sure things are otherwise really happy (eth and perhaps a USB stick)? >>> Thanks alot! >>> >> >> Yesterday, this was working great. This morning, when I turned on >> the board, it can no longer find anything on the USB bus - nothing at >> all. This also applies to Linux when I boot from SD. I'm really >> confused :-( >> >> If I boot the board using the 2011.06 U-Boot, all is happy again. >> It looks like the USB HUB (USB3320) seems to be stuck in reset when >> I use the latest U-Boot. >> >> Ever hear of any problems like this? > > How about if you turn the dcache off at run or build time? > Sorry for being thick, but how do I do that? I don't see any cache manipulation commands in 'help' -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------