imx6ull: NAND boot fails when block 0x00000000 is bad

[Fabio Estevam]

[Adding some more folks]

On Fri, May 13, 2022 at 2:41 PM Thierry Bultel
<thierry.bultel at linatsea.fr> wrote:
>
> Hi,
>
> I have a imx6ull module from Toradex, with NAND flash. U-boot does not
> have SPL.
> I does not boot from NAND flash anymore, I was able to flash it several
> times with tezi, as well as with
> nandbcb (that I discovered more recently).
>
> There are error messages complaining about some bad blocks, including
> block 0x00000000.
>
> Toradex say that the module cannot be recovered, but this seems in
> contradiction with what we can read
> from the iMX6 reference manual, where the boot process description
> mentions that the ROM can attempt to
> seek for FCB several times.
>
> I attempted to use nandbcb to write the FCB at next block, ie 0x20000
> (attempting a lower value
> makes nandbcb complain that I am not writing to an aligned location),
> with no better success.
>
> What is your mind about that ? Sounds that the answer could be in
> mis-configured fuses,
> else I consider that having block 0x00000000 causes a bricked board, as
> a weakness for production,
> in other words, an unreliable product.
>
> Best regards
> Thierry
>
>
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