Verdin imx8mm V1.1A can't flash emmc bootloader with uuu

Technical Support
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1

Hi,
We have the Verdin V1.1A imx8mm module installed on a custom board without display and ethernet.
I have build successfully the flash.bin bootloader an I am trying to flash it with uuu in the emmc.
The uuu script file is the following

uuu_version 1.2.39

SDP: boot -f boot_firmware/flash.bin

CFG: SDPU: -vid 0x0525 -pid 0xb4a4

SDPV: delay 1000

SDPV: write -f boot_firmware/flash.bin -skipspl

SDPV: jump

CFG: FB: -vid 0x0525 -pid 0x4000
CFG: FB: -vid 0x0525 -pid 0x4037
CFG: FB: -vid 0x0525 -pid 0x4039
CFG: FB: -vid 0x0525 -pid 0x403b
CFG: FB: -vid 0x0525 -pid 0x403c

FB: ucmd setenv fastboot_buffer 0x43000000

FB: ucmd setenv fastboot_dev mmc

FB: ucmd setenv mmcdev 0

FB: ucmd mmc dev 0 1

FB: flash bootloader boot_firmware/flash.bin

FB: Done:

The console output is:

U-Boot SPL 2020.04-06880-g4f5f8fac2f-dirty (Mar 17 2021 - 12:56:15 +0200)
DDRINFO: start DRAM init
DDRINFO: DRAM rate 3000MTS
DDRINFO:ddrphy calibration done
DDRINFO: ddrmix config done
Normal Boot
Trying to boot from USB SDP
SDP: initialize…
SDP: handle requests…
Downloading file of size 1089120 to 0x40400000… done
Jumping to header at 0x40400000
Header Tag is not an IMX image
Found header at 0x40431ba0
NOTICE: BL31: v2.2(release):7f1187ba
NOTICE: BL31: Built : 17:02:43, Mar 15 2021

U-Boot 2020.04-06880-g4f5f8fac2f-dirty (Mar 17 2021 - 12:56:15 +0200)

CPU: i.MX8MMQ rev1.0 1600 MHz (running at 1200 MHz)
CPU: Industrial temperature grade (-40C to 105C) at 54C
Reset cause: POR
DRAM: 2 GiB
MMC: FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC… OK
Fail to setup video link
In: serial
Out: serial
Err: serial
Model: Toradex Verdin iMX8M Mini Quad 2GB Wi-Fi / BT IT V1.1A, Serial# 06827678
get_tdx_eeprom: cannot find EEPROM by node
MISSING TORADEX CARRIER CONFIG BLOCKS
get_tdx_eeprom: cannot find EEPROM by node

BuildInfo:

  • ATF
  • U-Boot 2020.04-06880-g4f5f8fac2f-dirty

Detect USB boot. Will enter fastboot mode!
Net: eth0: ethernet@30be0000
Fastboot: Normal
Boot from USB for mfgtools
*** Warning - Use default environment for mfgtool
s
, using default environment

Run bootcmd_mfg: fastboot 0
Hit any key to stop autoboot: 0
Detect USB boot. Will enter fastboot mode!
Detect USB boot. Will enter fastboot mode!
flash target is MMC:0
Detect USB boot. Will enter fastboot mode!
switch to partitions #1, OK
mmc0(part 1) is current device
Detect USB boot. Will enter fastboot mode!
Starting download of 1277632 bytes
…
downloading of 1277632 bytes finished
writing to partition ‘bootloader’
Initializing ‘bootloader’
switch to partitions #1, OK
mmc0(part 1) is current device
Writing ‘bootloader’

MMC write: dev # 0, block # 66, count 2496 … 2496 blocks written: OK
Writing ‘bootloader’ DONE!

But the module doesn’t boot.
Any suggestions?

Best Regars,
Giannis

2

The i.MX 8M Mini requires a two block aka 1024 byte offset. See e.g. here for reference:

https://git.toradex.com/cgit/meta-toradex-nxp.git/tree/conf/machine/verdin-imx8mm.conf?h=dunfell-5.x.y#n82

3

Hi,
I tried both 0x400 and 0x8400 offsets without result. According to the imx8mm datasheet the offset for emmc fastboot should be 0x400.
I played with the u-boot command partconf:
partconf 0 1 1 0, partconf 0 1 1 1, partconf 0 1 1 2, partconf 0 1 1 3,… and in some combinations I managed to flash bootloader, but not always correct. ​
I couldn’t find any information about the emmc configuration for this module.
Can you please send me information how the partconf and bootbus configuration should be used for this module?

4

Thank you for the information.

5

W elcome .

6

I’m seriously wondering why exactly you are messing with any of that. The modules do come factory fused, pre-programmed and the Toradex Easy Installer can be used to install any and all suitable images.

Anyway, even though you do not even believe me with the 2 block offset I will tell you the exact details you are asking for. Please note however that fusing anything else WILL VOID YOUR WARRANTY!

The following commands are meant to be typed on a Verdin iMX8M Mini V1.1A or V1.1B ONLY at the U-Boot prompt. If your module is no longer booting at least to such U-Boot prompt then you may use the Toradex Easy Installer via USB recovery mode to get to such U-Boot prompt by interrupting it further booting into that.

fuse prog 1 3 0x100022d6
fuse prog 2 2 0x00000001

mmc bootbus 0 1 0 2
mmc partconf 0 1 1 0
mmc rst-function 0 1

load mmc 1:1 $loadaddr imx-boot
setexpr blkcnt ${filesize} + 0x1ff && setexpr blkcnt ${blkcnt} / 0x200
mmc dev 0 1
mmc write ${loadaddr} 0x2 ${blkcnt}