[U-Boot] Ethernet on PandaBoard

[Tetsuyuki Kobayashi]

Hi Gray,

On 2012/07/12, at 0:13, Gary Thomas wrote:

> On 2012-07-11 07:08, 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:
>> 
>> U-Boot SPL 2012.07-rc1 (Jul 11 2012 - 06:56:00)
>> OMAP4430 ES2.2
>> OMAP SD/MMC: 0
>> reading u-boot.img
>> reading u-boot.img
>> 
>> 
>> U-Boot 2012.07-rc1 (Jul 11 2012 - 06:56:00)
>> 
>> CPU  : OMAP4430 ES2.2
>> Board: OMAP4 Panda
>> I2C:   ready
>> DRAM:  1 GiB
>> MMC:   OMAP SD/MMC: 0
>> Using default environment
>> 
>> In:    serial
>> Out:   serial
>> Err:   serial
>> Net:   No ethernet found.
>> Hit any key to stop autoboot:  0
>> Panda # usb start
>> (Re)start USB...
>> USB:   Register 1313 NbrPorts 3
>> data abort
>> pc : [<bff9acb0>]          lr : [<bff9ac91>]
>> sp : bff08e28  ip : 0000000f     fp : 00000000
>> r10: bff0a370  r9 : 00000002     r8 : bff08f68
>> r7 : bffbb070  r6 : 00000000     r5 : bffaee04  r4 : 00001313
>> r3 : bffaee04  r2 : 98000000     r1 : 0000000a  r0 : 00000019
>> Flags: Nzcv  IRQs off  FIQs off  Mode SVC_32
>> Resetting CPU ...
>> 
>> Anyone else see this?  Ideas?
>> 
>> How do I map these addresses (PC=0xbff9acb0) to the ones in my
>> u-boot ELF image (so I can figure out what went wrong)?
>> 
>> Thanks
>> 
> 
> This turns out to be related to access to the wHubCharacteristics
> field in a hub descriptor.  This field is u16, but not u16 aligned,
> hence the data abort.
> 
> Has something changed recently?  I have a version of U-Boot built
> for this board based on 2011.06 from the meta-ti tree which does
> not suffer from these problems.
> 


How about this patch?

[PATCH] arm: armv7: add compile option	-mno-unaligned-access if available
http://lists.denx.de/pipermail/u-boot/2012-July/127260.html