[U-Boot] [PATCH v2] kwboot: boot Marvell Kirkwood SoCs over a serial link

[DrEagle]

Hi,

Le 08/05/2012 01:40, Daniel Stodden a écrit :
> On Sun, 2012-05-06 at 12:53 -0500, David Purdy wrote:
>> On Wed, May 2, 2012 at 2:16 PM, Luka Perkov <uboot at lukaperkov.net> wrote:
>>> The kwboot program boots boards based on Marvell's Kirkwood platform
>>> via Xmodem over their integrated UART.
>>>
>>> Signed-off-by: Daniel Stodden <daniel.stodden at googlemail.com>
>>> Acked-by: Luka Perkov <uboot at lukaperkov.net>
>>> ---
>>>
>>> Changes from version v1:
>>>  * fix man page
>>>  * minor cosmetic fixes in tools/kwboot.c
>>>
>>> I changed things pointed out on v1 of this patch which was originally
>>> made by Daniel.
>>>
>>
>> @ Daniel, Luka, Prafulla, etal :
>>
>> I've tried kwboot on two of my devices, and as I was expecting:
>>
>> - it worked perfectly with the v1.21 BootROM device (a Seagate GoFlex
>> Net) : Nicely done, well implemented, and the "timing" seems to be a
>> non-issue w/ kwboot.  Other previous applications for UARTbooting have
>> seemed to me to be less reliable - only booting 50% or 75% of the
>> time.  I tried it with kwboot a dozen times or more and it was
>> successful each time,  The -p patch-for-UART-booting option is a nice
>> feature.
>>
>>
>> - it did not seem to work w/  v1.11 BootROM devices (a Pogoplug
>> V2/E02, Seagate Dockstar) {previous utilities/picocom-hacks showed the
>> same behavior - the bootROM version 1.11 apparently has some
>> difference/defect/shortcoming that does not allow this function to
>> work as the docs suggest it should.  Too bad no one has pointed out
>> exactly what the issue is, or found a patch/workaround it make this
>> work on v1.11  BootROM devices.}.   NOTE: It did _not_ adversely
>> affect the device otherwise.  I'd seen a post on a thread at another
>> site that suggested that performing this procedure on a v1.11 device
>> could corrupt the NAND - this was __not__ the case w/ my attempts
>> (about a dozen trials, with UART uboot.kwb's and also using the -p
>> patch option w/ NAND files.
> 
> Hey.
> 
> Unfortunately I only have a couple Buffalo boards and a Qnap, all
> essentially the same chip.
> 
> Say, if you find the time, could you run it through strace and post the
> full output? (strace -o /tmp/kwboot.log -s 256 -T ..). 
> 
> Just see where it bails. Maybe it's some issue worth trying to hack
> around.


Have you tried to put the bootrom in the debug mode ?

https://doukki.net/doku.php?id=wiki:tutoriels:u-boot.uart#boot_from_uart0

Réfs :
http://www.marvell.com/embedded-processors/kirkwood/assets/FS_88F6180_9x_6281_OpenSource.pdf

May be it can helps to understand the 1.11 and 1.21 differences ?

Amicalement,
---
Gk2
:-]