Am 27.08.2016 um 19:44 schrieb Juan Rios:
   I managed to get this router and want to get lede on it. The hardware is this

Lantiq VRX288 500Mhz
Wireless 2.4Ghz BCM43222KFBG
Wireless 5Ghz BCM4360KMLG
5 port GB Ethernet

I would suggest to check whether the wireless chips are supported by any open source driver and to decide afterwards if it's worth the time to work further on this device. Broadcom and open source (wireless) drivers is usually a story of pain.

I already found serial port pins and got the console log. The log is
almost silent. I managed to get to the brnboot shell short cutting
pins in the flash but cant do a flash dump.

Next time please paste the serial logs anyway. Maybe someone else is able to spot something interesting.

    Area            Address      Length
[0] Boot            0x00000000    1024K
[1] Image 0         0x00100000   10240K
[2] Image 1         0x00B00000   10240K
[3] Configuration   0x01500000    2048K
[4] Boot Params     0x01700000    2048K
[5] Nvram           0x01900000    1024K
[6] Cert            0x01A00000   32768K
[7] EmergencyValue  0x03A00000    6144K
[8] Configuration2  0x04000000    2048K
[9] All area        0x00000000   67584K

I wouldn't trust this flash layout. Doesn't look right to me for a 128MB flash chip.

If I try to read from above address the router gets locked.

I can read from certain area like memory or 0xBC000000 or 0xBE000000
but others locks the router.

You can not access the NAND flash via the system memory addresses. It only works for memory mapped flash like NOR. NAND is I/O mapped.

The boot ask for a password and continues booting.

The emergency boot kernel is openwrt 10.3

What is a emergency boot kernel? Are you talking about the recovery web interface you get when press and hold the reset button on power on? If they are using OpenWrt, they have to provide the GPL sources. Ask for them!

I found out that short cutting R201 I get CFG 07 instead of CFG 06 so
maybe UART Mode is R201 + R203 but not sure. Not quite sure to try

With Lantiq SoCs in NAND boot config it should be enough to bring one of the bootsel pins to GND to force the SoC into UART mode.

I can load to memory using xmodem transfer and run but all I tried get
locked without any output.

What I want is first dump the current content of the flash. Any ideas?

You can try to build an ascii (UART) u-boot for this device. But this requires the correct GPIO settings and matching memory parameters for the RAM chip. Usually I'm extracting the RAM chip parameters from the brnboot binary. But this seams to me a "chicken or the egg" problem here.

What's more likely to work is to create a second stage (brnboot) u-boot which doesn't have to do the low level chip initialisation and can be started from the brnboot shell [1]. You can use the u-boot for the BT HomeHub 5A [2] as a beginning and add the missing SYS_BOOT_BRN stuff from the VGV7510KW22 [3]. This might allow you to dump the NAND from the second stage u-boot.


[1] [2] [3]

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