imx8mp: Flashing U-Boot into eMMC hardware partition via UUU

[Michael Nazzareno Trimarchi]

On Fri, May 10, 2024 at 4:19 PM Fabio Estevam <festevam at gmail.com> wrote:
>
> Hi,
>
> I am using an imx8mp-evk board and I can flash the U-Boot into the
> eMMC hardware partition 0 by running:
>
>    => tftpboot $loadaddr flash.bin
>    => setexpr blkcnt $filesize + 0x1ff && setexpr blkcnt $blkcnt / 0x200
>    => mmc dev 2 1
>    => mmc write $loadaddr 0 $blkcnt
>
> Now I want to do the same via UUU.
>
> I tried to create a script called emmc_flash:
>
> uuu_version 1.5.21
>
> SDPS: boot -f flash.bin
> SDPS: done
> FB: ucmd setenv fastboot_dev mmc
> FB: ucmd mmc dev 2 1
> FB: flash bootloader flash.bin
> FB: Done
>
> Then on the PC: uuu emmc_flash
>
> U-Boot is loaded to RAM, but the eMMC hardware partition is not programmed.
>
> What is the correct script for doing this?
>
> Any suggestions?

Create an lst file

Hi Fabio

Top posting

# @_flash.bin            | bootloader
# @_image   [_flash.bin] | image burn to nand, default is the same as bootloader
# @_filesystem           | filesystem to burn
# @_kernel               | kernel image
# @_dtb                  | dtb image

# This command will be run when ROM support stream mode
# i.MX8QXP, i.MX8QM
SDPS: boot -f _flash.bin

FB: ucmd setenv fastboot_buffer ${loadaddr}
FB: download -f _image
# Burn image to nandfit partition if needed
FB: ucmd if env exists nandfit_part; then nand erase.part nandfit;
nand write ${fastboot_buffer} nandfit ${filesize}; else true; fi;
FB: ucmd nandbcb init ${fastboot_buffer} nandboot ${filesize}

FB[-t 10000]: ucmd ubi part nandrootfs
FB[-t 10000]: ucmd ubi create root -
FB: download -f _filesystem
FB[-t 60000]: ucmd ubi write ${loadaddr} root ${filesize}

FB: download -f _kernel
FB[-t 10000]: ucmd nand write ${loadaddr} nandkernel ${filesize}

FB: download -f _dtb
FB[-t 8000]: ucmd nand write ${loadaddr} nanddtb ${filesize}

FB: reboot
FB: done

You can just change as you want. We have this file in buildroot, uuu
can run command on the device
using FB command. Example how call it

${OUTPUT_DIR}/host/bin/uuu -v -b ${IMAGES_DIR}/nand-full.lst \
  ${IMAGES_DIR}/flash.bin \
  ${IMAGES_DIR}/flash.bin \
  ${IMAGES_DIR}/rootfs.ubifs \
  ${IMAGES_DIR}/Image \
  ${IMAGES_DIR}/freescale/imx8mn-bsh-smm-s2.dtb


Michael

>
> Thanks



-- 
Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
M. +39 347 913 2170
michael at amarulasolutions.com
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