imx6ull: NAND boot fails when block 0x00000000 is bad

[Michael Nazzareno Trimarchi]

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 <www.linatsea.fr>
> > --
> > www.linatsea.fr
>