[U-Boot] u-boot fails to read from nand flash in omap3

[Hiremath, Vaibhav]

> -----Original Message-----
> From: u-boot-bounces at lists.denx.de [mailto:u-boot-
> bounces at lists.denx.de] On Behalf Of fgd
> Sent: Tuesday, January 19, 2010 1:52 PM
> To: u-boot at 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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> read-from-nand-flash-in-omap3-tp27222315p27222315.html
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