Debian on Action Tech SG200 (no replies)

Hi Guys.
I've soldered some wires to the serial pins on an ActionTec200 and it has an old U-Boot as well as a debian 5 base system.
Created a fresh Kirkwood 4.12 rootfs.
The U-Boot
This is the output of the help command in uboot

BootROM 1.34
Booting from NAND flash
BootROM: Image checksum verification PASSED

 __   __                      _ _
|  \/  | __ _ _ ____   _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| |  | | (_| | |   \ V /  __/ | |
|_|  |_|\__,_|_|    \_/ \___|_|_|
         _   _     ____              _
        | | | |   | __ )  ___   ___ | |_
        | | | |___|  _ \ / _ \ / _ \| __|
        | |_| |___| |_) | (_) | (_) | |_
         \___/    |____/ \___/ \___/ \__|
 ** LOADER **


U-Boot 2009.08 (May 09 2011 - 18:11:51) Marvell version: 2.1.6_NQ

Board: SG200
SoC:   MV88F6560 Rev 2
CPU:   Marvell Feroceon (Rev 1) - LE
       CPU @ 1200Mhz, L2 @ 480Mhz
       DDR3 @ 400Mhz, TClock @ 200Mhz
PEX 0: Root Complex Interface, Detected Link X1
PEX 1: Detected No Link.
DRAM:  512 MB
       CS 0: base 0x00000000 size 512 MB
       Addresses 10M - 0M are saved for the U-Boot usage.
NAND:  1bit HM ECC, Size: 512 MiB
USB 0: Host Mode
Shutting down unused interfaces:
       PON
       SATA
       Switch
       3xFE-PHY
Modules Detected:
       No PON module.
       GE-PHY on MAC1.
Net:   egiga0, egiga1 [PRIME]
Hit any key to stop autoboot:  0
Marvell>>  help
?       - alias for 'help'
SatR    - Sample At Reset sub-system

aei_boot- aei_boot  - boot or setup
autoscr - DEPRECATED - use "source" command instead
base    - print or set address offset
bdinfo  - print Board Info structure
boot    - boot default, i.e., run 'bootcmd'
bootd   - boot default, i.e., run 'bootcmd'
bootext2- bootext2    dev:boot_part1,boot_part2 addr boot_image linux_dev_name

bootm   - boot application image from memory
bootp   - boot image via network using BOOTP/TFTP protocol
bubt    - bubt  - Burn an image on the Boot Nand Flash.

chpart  - change active partition
cmp     - memory compare
cmpm    - cmpm  - Compare Memory

coninfo - print console devices and information
cp      - memory copy
cpumap  - cpumap - Display CPU memory mapping settings.

crc32   - checksum calculation
date    - get/set/reset date & time
dclk    - dclk  - Display the MV device CLKs.

dhcp    - boot image via network using DHCP/TFTP protocol
diskboot- diskboot- boot from IDE device

echo    - echo args to console
eeprom  - EEPROM sub-system
ethCounters- ethShow    - show the current ETH port counters

ethShow - ethShow       - scanning the PHYs status

ext2load- load binary file from a Ext2 filesystem
ext2ls  - list files in a directory (default /)
fatinfo - print information about filesystem
fatload - load binary file from a dos filesystem
fatls   - list files in a directory (default /)
fi      - fi    - Find value in the memory.

g       - g     - start application at cached address 'addr'(default addr 0x40000)

go      - start application at address 'addr'
help    - print online help
i2c     - I2C sub-system
ide     - ide     - IDE sub-system

iminfo  - print header information for application image
imxtract- extract a part of a multi-image
ir      - ir    - reading and changing MV internal register values.

itest   - return true/false on integer compare
loadb   - load binary file over serial line (kermit mode)
loads   - load S-Record file over serial line
loady   - load binary file over serial line (ymodem mode)
loop    - infinite loop on address range
map     - map   - Diasplay address decode windows

md      - memory display
me      - me    - PCI master enable

mm      - memory modify (auto-incrementing address)
mmc     - MMC sub-system
mp      - mp    - map PCI BAR

mpp     - mpp
mtdparts- define flash/nand partitions
mtest   - simple RAM read/write test
mux     - mux set
mw      - memory write (fill)
nand    - NAND sub-system
nboot   - boot from NAND device
nbubt   - nbubt - Burn a boot loader image on the Boot Nand Flash.

nfs     - boot image via network using NFS protocol
nm      - memory modify (constant address)
pci     - list and access PCI Configuration Space
pciePhyRead- phyRead    - Read PCI-E Phy register

pciePhyWrite- pciePhyWrite      - Write PCI-E Phy register

phyRead - phyRead       - Read Phy register

phyWrite- phyWrite      - Write Phy register

ping    - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
rarpboot- boot image via network using RARP/TFTP protocol
rcvr    - rcvr  - Satrt recovery process (Distress Beacon with TFTP server)

reset   - Perform RESET of the CPU
resetenv- resetenv      - earse environment sector to reset all variables to default.

run     - run commands in an environment variable
saveenv - save environment variables to persistent storage
se      - se    - PCI Slave enable

setenv  - set environment variables
sg      - sg    - scanning the PHYs status

sleep   - delay execution for some time
source  - run script from memory
sp      - sp    - Scan PCI bus.

switchCountersRead- switchCntPrint      - Read switch port counters.

switchPhyRegRead- - Read switch register

switchPhyRegWrite- - Write switch register

switchRegRead- switchRegRead    - Read switch register

switchRegWrite- switchRegWrite  - Write switch register

tftpboot- boot image via network using TFTP protocol
ubi     - ubi commands
ubifsload- load file from an UBIFS filesystem
ubifsls - list files in a directory
ubifsmount- mount UBIFS volume
usb     - USB sub-system
usbboot - boot from USB device
version - print monitor version
Marvell>>

The rootfs is ext2 otherwise the uboot does not want to read it but as ext2 I can load the usb device and list the files

BootROM 1.34
Booting from NAND flash
BootROM: Image checksum verification PASSED

 __   __                      _ _
|  \/  | __ _ _ ____   _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| |  | | (_| | |   \ V /  __/ | |
|_|  |_|\__,_|_|    \_/ \___|_|_|
         _   _     ____              _
        | | | |   | __ )  ___   ___ | |_
        | | | |___|  _ \ / _ \ / _ \| __|
        | |_| |___| |_) | (_) | (_) | |_
         \___/    |____/ \___/ \___/ \__|
 ** LOADER **


U-Boot 2009.08 (May 09 2011 - 18:11:51) Marvell version: 2.1.6_NQ

Board: SG200
SoC:   MV88F6560 Rev 2
CPU:   Marvell Feroceon (Rev 1) - LE
       CPU @ 1200Mhz, L2 @ 480Mhz
       DDR3 @ 400Mhz, TClock @ 200Mhz
PEX 0: Root Complex Interface, Detected Link X1
PEX 1: Detected No Link.
DRAM:  512 MB
       CS 0: base 0x00000000 size 512 MB
       Addresses 10M - 0M are saved for the U-Boot usage.
NAND:  1bit HM ECC, Size: 512 MiB
USB 0: Host Mode
Shutting down unused interfaces:
       PON
       SATA
       Switch
       3xFE-PHY
Modules Detected:
       No PON module.
       GE-PHY on MAC1.
Net:   egiga0, egiga1 [PRIME]
Hit any key to stop autoboot:  0
Marvell>>  usb start
(Re)start USB...
USB:   Register 10011 NbrPorts 1
USB EHCI 1.00
scanning bus for devices... 3 USB Device(s) found
       scanning bus for storage devices... 1 Storage Device(s) found
Marvell>> ext2ls usb 0:1 /
<DIR>       4096 .
<DIR>       4096 ..
<DIR>      16384 lost+found
<DIR>       4096 proc
<DIR>       4096 sbin
<DIR>       4096 dev
<DIR>       4096 root
<DIR>       4096 usr
<DIR>       4096 opt
<DIR>       4096 boot
<DIR>       4096 bin
<DIR>       4096 etc
<DIR>       4096 tmp
<DIR>       4096 mnt
<DIR>       4096 var
<DIR>       4096 home
<DIR>       4096 media
<DIR>       4096 sys
<DIR>       4096 run
<DIR>       4096 lib
<DIR>       4096 srv
Marvell>>

Next step would be to tune the environment to boot from the usb rootfs, it has the sheevaplug dtb integrated in the kernel image.

Any advice on how to do that?

Thank You!