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Subject: Re: Help needed with MTD on AT91SAM9263-EK please.
From: James <jamessteward@optusnet.com.au>
To: Richard Genoud <richard.genoud@gmail.com>
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Date: Thu, 29 May 2008 16:46:51 +1000
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On Thu, 2008-05-29 at 08:41 +0200, Richard Genoud wrote:
> > Just out of interest, I did the same over 10 pages.
> > $ ./flash_eraseall /dev/mtd0
> > $ dd if=/dev/urandom bs=2k count=10 of=/dev/mtd0
> > $ nanddump -p -l20480 /dev/mtd0 1> /dev/null
> > ECC failed: 3
> > ECC corrected: 0
> > Number of bad blocks: 0
> > Number of bbt blocks: 0
> > Block size 131072, page size 2048, OOB size 64
> > Dumping data starting at 0x00000000 and ending at 0x00005000...
> > ECC: 1 uncorrectable bitflip(s) at offset 0x00003800
> >
> > Foobar!

> ok, so this must be a hardware problem...

I've emailed Atmel.  I suspect a chip has undergone a dies shrink and
now there's a timing spec that's violated, unless I've got 2-3 boards
all with the same hardware problem.

I'll look through the EBI timing setup and the chip requirements when I
get another moment.

Thanks for your help in the diagnosis.  It was good just to know that
others are using this without such problems.

Regards,
James.