-----Original Message----- From: David Purdy [mailto:david.c.purdy@gmail.com] Sent: 06 May 2012 23:24 To: u-boot@lists.denx.de; daniel.stodden@googlemail.com; Prafulla Wadaskar; Luka Perkov; dreagle@doukki.net Subject: Re: [U-Boot] [PATCH v2] kwboot: boot Marvell Kirkwood SoCs over a serial link
On Wed, May 2, 2012 at 2:16 PM, Luka Perkov uboot@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@googlemail.com Acked-by: Luka Perkov uboot@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originally
made by Daniel.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?
Hi Dave I really don't have any specific insight of UART boot. I know Kirkwood expose this feature, and really very useful. I will check the utility at my end too. I would love to pull this patch as soon as it matures, need ack from all of you on its functionality and code too :-D
Regards.. Prafulla . . .