u-boot reports ecc error on blocks written by nandwrite

[James]

On Mon, 2008-06-02 at 14:56 -0700, Mark Roths wrote:
> Yes, u-boot can erase, write, and read with no problems on its own.  
> I use the u-boot nand utilities to build my flash with bootloader, u-boot,
> linux and initrd.  All that works fantastically.
> 
> The only time I have problems is when I write a block in my boot partition
> using nandwrite, and then subsequently read it with u-boot on the next boot.
> And the completely strange behavior is that if I request 1 byte using 'nand
> read', it fails the 1st time and then succeeds - all reads succeed after
> that with no ecc errors.

Sounds almost like a cache problem.

> Both the mtdchar driver and u-boot are configured for soft ecc, or so I
> believe from my reading of the code.

Likely.

I've had a plethora of problems using the NAND MT29F2G08AACWP on some
AT91SAM9263-EK boards.  I now feel it might be a timing issue.  Maybe
yours is too!

Regards,
James.