Re: flash barebox to NAND

[Mihaita Ivascu <mihaita_ivascu@trimble.com>]

On Thu, Oct 24, 2019 at 8:58 AM Sascha Hauer <s.hauer@pengutronix.de> wrote:
>
> On Wed, Oct 23, 2019 at 03:47:49PM +0200, Mihaita Ivascu wrote:
> > On Wed, Oct 23, 2019 at 3:33 PM Sascha Hauer <s.hauer@pengutronix.de> wrote:
> > >
> > > On Wed, Oct 23, 2019 at 11:39:00AM +0200, Mihaita Ivascu wrote:
> > > > Hello all,
> > > >
> > > >   I would like to know what possibilities do I have to flash a barebox
> > > > image to mtd partition from Linux?
> > > >  Using ubifs commands does not work. the barebox will not boot so
> > > > probably additional info needs to be written except the barebox image
> > > > itself.
> > >
> > > On i.MX a bootloader image can't be written to Nand directly. In barebox
> > > you can update barebox with the barebox_update command which has support
> > > for the special image format requirements of the i.MX6. I currently
> > > don't know any userspace code that can do this, apart from mfgtools or
> > > other tools from the NXP universe that I have never used. Somebody told
> > > me he wanted to port the i.MX6 barebox update code to userspace, but
> > > unfortunately I can't remember who it was and I can't find any pointers
> > > to it.
> > >
> > > Regards,
> > >   Sascha
> > >
> >
> >    Thanks for your detailed answer.
> >    so there is no way to update a barebox on NAND from Linux except
> > from the barebox itself(using barebox_update command) ?
> >    Yes I am trying with mfgtools but no success. NXP does not support
> > barebox just u-boot and I was not successful on adding mfgtools/UTP
> > support in barebox.
> >    And using the u-boot konbs-ng command for flashing bootloader to
> > NAND is faulty and the reason is documented in the NXP community.
> >   Surely somebody from barebox community must have had the need before
> > to update the barebox otherway than using barebox_update from the
> > barebox itself.
>
> One way to update barebox indirectly from Linux is to put the new
> barebox image to some known place in the rootfs. Now in barebox
> write a small script:
>
> /env/init/bbu.sh:
>
> #!/bin/sh
>
> if [ -f /mnt/mmc0.0/boot/barebox-update.bin ]; then
>         barebox_update -y /mnt/mmc0.0/boot/barebox-update.bin
>         reset
> fi
>
> Then again under Linux delete that file when the running barebox version
> (as read from the device tree or kernel commandline) matches the update
> image.
>
> Sascha

Hello,

    Thanks for the tip. In the meantime I am able to load a barebox
using MFTools in RAM and run it. So i can modify that barebox to
include a script that does this barebox_update
from the barebox that is loaded using MFGTools. My issue now is how do
I make barebox_update to read the barebox.bin which was written in
nand(in some mtd0 partition from Linux)
    The problem is that I have no mmc or other mountable device in
barebox. Only the nand
    So I don't know how I should access the nand partition from a
script in the barebox.
    do you have any suggestion?

Thanks,
      Mihaita


>
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