Hi All, using sd-flasher.exe on a linux development system is a pita, does anyone know how to dd either superboot or u-boot to an sd card in linux? I've had a look all over the interwebs and I can't find anyone that actually does it, it seems that everyone uses sd-flasher.exe which is pretty stupid considering these boards seem to revolve around linux.
Nobody do it with 'dd', because it is not possible. The iROM code inside the S3C6410 SoC expects a special sector layout. You need a tool which first inspects the SD card (its sector count) and then spreads the u-boot binary to the card. If you use my BSP for the Mini6410 then you have such a small tool. But it still fails to populate cards with more than 2 GiB capacity (SDSC versus SDHC types of cards).
That's odd as the irom application note mentions being able to use sdhc cards, there's also no issue using superboot on a 4GB card, so I wonder exactly where the limitation is Juergen?
The limitation is - a bug in the iROM code which needs an annoying sector layout for SDHC cards. This layout differs from the SDSC cards. - u-boot needs some different settings when compiling it, to support this annoying sector layout at runtime - you need to u-boot binaries: one for the SDSC cards, and one for the SDHC cards. Maybe I'm wring, but I wasn't able to make it work with SDHC cards yet. I started a different approach to be able to load Barebox instead, but it is still not finished, because Barebox for the Mini6410 is still not fully functional (lack of SD card support).
Any chance you can share what information you have about the weird sector layout for the sdhc cards and the irom bug? Or at least where I can start researching it?
> Any chance you can share what information [...] Sure. Give me your email address and I will send you the relevant PDF. AFAIR it was posted here in the forum. But I'm not sure. I could also provide a GIT repository with the current state of my own bootloader which tries to deal with the sector layout.
Thanks Juergen, I think I pretty much found all the information I needed, there's a irom pdf and if you wander around the chinese part of the internet there is a ton of info, those guys appear to have uboot and sdhc working quite nicely. I might get back to you though if it turns out this information isn't quite enough.
to Juergen Beisert : can you share the current barebox state on 6410? or the git repository? I have find a nand boot patch: (from http://www.cnblogs.com/lknlfy/archive/2013/05/26/3100382.html) http://files.cnblogs.com/lknlfy/barebox-1.patch.rar but the code is big different with s3c2440 in barebox. any schedule for official support nand boot and sd card boot? my email: niqingliang2003@gmail.com
yiqingliang, > can you share the current barebox state on 6410? or the git repository? git://git.pengutronix.de/git/barebox.git > but the code is big different with s3c2440 in barebox. Sure. The Mini6410 uses a completely different SoC than the Mini2440. > any schedule for official support nand boot and sd card boot? No