imx6ull: NAND boot fails when block 0x00000000 is bad

[Thierry Bultel]

Hi Michael,
I am using version 2022.04


|Colibri iMX6ULL # nand erase.chip NAND erase.chip: device 0 whole chip 
Skipping bad block at 0x00000000 Skipping bad block at 0x1ff80000|

Thierry

Le 13/05/2022 à 20:00, Michael Nazzareno Trimarchi a écrit :
> Hi Thierry
>
> Il ven 13 mag 2022, 19:56 Fabio Estevam <festevam at gmail.com> ha scritto:
>
>     [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.
>
>
> What U-Boot version are you using? Anyway block 0 is always guarantee 
> by nand manufacturer, so having that bad look strange
>
> Michael
>
>     >
>     > Best regards
>     > Thierry
>     >
>     >
>     > --
>     > Re: test
>     > www.linatsea.fr <http://www.linatsea.fr> <www.linatsea.fr
>     <http://www.linatsea.fr>>
>     > --
>     > www.linatsea.fr <http://www.linatsea.fr>
>

-- 
Re: test
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-- 
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