-----Original Message----- From: u-boot-bounces@lists.denx.de [mailto:u-boot- bounces@lists.denx.de] On Behalf Of fgd Sent: Tuesday, January 19, 2010 1:52 PM To: u-boot@lists.denx.de Subject: [U-Boot] u-boot fails to read from nand flash in omap3
Hi everyone, I've recently been playing with an omap3 beagle board and I've found a problem that I think involves the reading of nand memory... I have recompiled u-boot for the beagle board (I just changed its prompt, as a simple test to check that it's my u-boot and not the one that was there
[Hiremath, Vaibhav] U-Boot version may be useful here.
before, and I used the default configs for the beagle), then I have loaded u-boot and the x-loader into flash, and I have succesfully rebooted and seen 'my' u-boot prompt... after that, I wanted to load a linux kernel and a file system into nand flash, instead of using the external memory card (if I boot a kernel stored there, it works), so I go and load an uImage into flash, then read it back to RAM, and boot from there, and it still works, BUT, as soon as I reset the OMAP, when it tries to copy the kernel data stored in flash into RAM to boot from it, the nand reading operation will fail, and if I try to boot that kernel it will complain about a CRC checksum error... the exact error looks like this: # nand read ${loadaddr} 280000 400000
NAND read: device 0 offset 0x280000, size 0x400000 NAND read from offset 280000 failed -74
[Hiremath, Vaibhav] Can you please provide exact steps which you are following for NAND write and read operation?
note that this just happens after I reset the board... I thought it could be a hardware problem with my board, but I've tried in a different board (an omap3 evm) and I'm getting the same thing, so I think I might be missing
[Hiremath, Vaibhav] I am working on OMAP3EVM and it is working fine for me. It looks like somehow NAND is getting corrupted, detailed steps required to comment anything on this.
Thanks, Vaibhav
something... has anyone of you tried something like this or has encountered any similar problem? any help will be greatly appreciated, if you need any extra info about what I have done just tell me... thanks a lot in advance, regards
Fernando
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