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

[David Purdy]

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.

Prafulla, do you have any insight into the differences in between 1.11
and 1.21 that would help in this issue?

regards,

Dave