From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gary Thomas Date: Thu, 12 Jul 2012 08:26:55 -0600 Subject: [U-Boot] Ethernet on PandaBoard In-Reply-To: <4FFED0DD.10203@mlbassoc.com> References: <4FFD7AE2.8000109@mlbassoc.com> <20120712092018.GA5464@oliver-linux> <20120712093036.GB5464@oliver-linux> <4FFECBBA.9030308@mlbassoc.com> <20120712131501.GC7993@oliver-linux> <4FFECE87.7070301@mlbassoc.com> <20120712132055.GD7993@oliver-linux> <4FFED0DD.10203@mlbassoc.com> Message-ID: <4FFEDEAF.1060406@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 07:27, Gary Thomas wrote: > On 2012-07-12 07:20, Tom Rini wrote: >> On Thu, Jul 12, 2012 at 07:17:59AM -0600, Gary Thomas wrote: >>> 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' >> >> Looks like omap4 doesn't have CONFIG_CMD_CACHE set, so indeed you're >> missing 'dcache off' as a command. The other one is to add >> CONFIG_SYS_DCACHE_OFF to omap4_panda.h (or omap4_common.h) and rebuild. >> > > No difference, sorry. > After some poking around, I found that the GPIO pins used by the USB (GPIO_1 = hub power, GPIO_62 = hub reset) were not muxed at all. This left those signals (and many others) in strange limbo. Adding CONFIG_SYS_ENABLE_PADS_ALL brought it back to life and the network is working once more. -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------