Pogo V4 uBoot + Debian install issue (7 replies)

Hi everyone.

This is my first post and first time installing the doozan uBoot and a bootable Debian image on a Pogo V4. A few years ago I installed the Arch uBoot & bootable Arch image on some V4s, but now I'm trying to flash a newer uBoot to the remaining stock devices.

I followed many posts here on how to do this, and spent a couple of days trying to document it and do it right. At some point in the middle of it all the V4 rebooted, and now I don't know what the problem is and what to focus on to solve this.

Here's the posts I based my installation attempts on:
"2017.07 U-Boot Kirkwood" (primary) - forum.doozan.com/read.php?3,12381
"UART Booting HowTo" - forum.doozan.com/read.php?3,7852,7852
"U-Boot flashing" - forum.doozan.com/read.php?3,27280
"Linux Kernel 6.1.7 Kirkwood package and Debian rootfs" - forum.doozan.com/read.php?2,12096

I have a serial connection to the V4, hardwired to a RPi's serial port, so I can watch the boot sequence. UART booting using kwboot worked really well, and I used the uboot.2017.07-tld-1.pogo_v4.mtd0.kwb upload to step through the process.

If I could figure out where I really am in the steps I would gladly post any commands and results - but I have no clue what I've missed.

When I power the V4 up with the USB in place, it seems like U-Boot 2017.07-tld-1 must be installed, but then it doesn't boot off the drive. Here's what I see when it boots, and it lights up the front green & red LEDs then locks up:

U-Boot 2017.07-tld-1 (Sep 05 2017 - 00:34:01 -0700)
Pogoplug V4

SoC:   Kirkwood 88F6192_A1
DRAM:  128 MiB
WARNING: Caches not enabled
NAND:  128 MiB
MMC:   MVEBU_MMC: 0
In:    serial
Out:   serial
Err:   serial
Net:   egiga0
Hit any key to stop autoboot:  0
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 2 USB Device(s) found
       scanning usb for storage devices...
Use USB retry period from the environment: 15 second(s)
1 Storage Device(s) found

Reset IDE: ide_preinit failed
Card did not respond to voltage select!
mmc_init: -95, time 14

Partition Map for USB device 0  --   Partition Type: DOS

Part    Start Sector    Num Sectors     UUID            Type
  1     2048            120162304       00000000-01     83

## Unknown partition table type 0

## Unknown partition table type 0

## Unknown partition table type 0

## Unknown partition table type 0

## Unknown partition table type 0

## Unknown partition table type 0
loading envs from usb 0 ...
** File not found /boot/uEnv.txt **

no IDE devices available
Card did not respond to voltage select!
mmc_init: -95, time 14
running scan_disk ...
Scan device usb
device usb 0:1
1 bytes read in 722 ms (0 Bytes/s)
Found bootable drive on usb 0
loading uImage ...
5435888 bytes read in 1013 ms (5.1 MiB/s)
loading uInitrd ...
9671091 bytes read in 966 ms (9.5 MiB/s)
loading DTB kirkwood-pogo_v4.dtb ...
** File not found kirkwood-pogo_v4.dtb **
## Booting kernel from Legacy Image at 00800000 ...
   Image Name:   Linux-5.13.6-kirkwood-tld-1
   Created:      2021-09-24   0:22:58 UTC
   Image Type:   ARM Linux Kernel Image (uncompressed)
   Data Size:    5435824 Bytes = 5.2 MiB
   Load Address: 00008000
   Entry Point:  00008000
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 01100000 ...
   Image Name:   initramfs-5.13.6-kirkwood-tld-1
   Created:      2021-09-24   1:06:32 UTC
   Image Type:   ARM Linux RAMDisk Image (gzip compressed)
   Data Size:    9671027 Bytes = 9.2 MiB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
   Loading Ramdisk to 071d0000, end 07b09173 ... OK

Starting kernel ...

Uncompressing Linux... done, booting the kernel.

Error: invalid dtb and unrecognized/unsupported machine ID
  r1=0x00000f78, r2=0x00000100
  r2[]=05 00 00 00 01 00 41 54 00 00 00 00 00 00 00 00
Available machine support:

ID (hex)        NAME
ffffffff        Generic DT based system
ffffffff        Marvell Kirkwood (Flattened Device Tree)

Please check your kernel config and/or bootloader.

Any help making sense out of this is greatly appreciated!