As the device seems not to be fully supported by OpenWRT, you may want to take a look at the Freetz project, which adds extended features to the original AVM firmware. There is a free DSP Compiler available. A good reference for more information is also the inofficial AVM Wiki (german), specifically Fritz!Box 7170.

Update current information!

As of time of 22nd Nov 2010 developers say that:

• Wireless stability is supposedly almost done
• No dsl rewrite is needed (afaik)
• Usb client support is trivial to add
• Usb host support is in low demand

See also:

• http://www.wehavemorefun.de/fritzbox/AR7
• http://www.linux-mips.org/wiki/AR7

1. → obtain.firmware
2. → Install OpenWrt

Only the squashfs version works. The jffs2 image won't boot.

The default flash layout of the AVM firmware is Hidden Root

Please check out the article Flash Layout. It contains an example and a couple of explanations.

mtd0    0x90000000,0x90000000
mtd1    0x90010000,0x90780000
mtd2    0x90000000,0x90010000
mtd3    0x90780000,0x907C0000
mtd4    0x907C0000,0x90800000

The fritz-flash script is one simple way to install Openwrt:

1. Configure your PC to the static IP-Address 192.168.178.5/24 and set the default route to 192.168.178.254
2. Remove the power plug of the router.
3. Open a terminal and type:

   ./fritz-flash -f openwrt-EVA-2.6-squashfs.bin

4. Reinsert the power plug.

→ generic.sysupgrade

→ Basic configuration After flashing, proceed with this.
Set up your Internet connection, configure wireless, configure USB port, etc.

→ generic.failsafe

→ hardware.button on howto use and configure the hardware button(s).

• Note: This will void your warranty
• To remove the cover, use a flat screwdriver, to remove the clasps from the notches on the bottom. No screws present to unscrew.

Main PCB

→ port.serial general information about the serial port, serial port cable, etc.

How to connect to the Serial Port of this specific device:

→ port.jtag general information about the JTAG port, JTAG cable, etc.

How to connect to the JTAG Port of this specific device:

Photo of PCB with markings

 TRST  1   2 GND
 TDI    3   4 GND
 cTDO   5   6 GND
 TMS    7   8 GND
 TCK    9  10 GND
 RST   11  12 KEY
 DINT  13  14 3V3
  ?    15  16 cTRST
  ?    17  18 GND
 3V3   19  20 ?
  ?    21  22 GND
  ?    23  24 GND
  ?    25  26 GND
  ?    27  28 ?
  

Note: The c stands for coprocessor and is needed if a second device is in the JTAC chain, like is the case for the FB7170. So both the TRST and cTRST need to be connected to 3.3 volt via a 100 Ohm resistor.

The JTAG software that supports multiple JTAG devices in a chain can be found here: http://freetzlinux.svn.sourceforge.net/viewvc/freetzlinux/trunk/wrtjp/wrtjp.5.2/

For the 2000 2397 (Infineon) I only got the following output.

/fritzbox/jtag/wrtjp.5.2# ./wrt54g -probeonly

==================================================
WRT54G/GS/AVM/Speedport EJTAG Debrick Utility v5.2
==================================================

***-----------------------------------------------------------------***

Beginning detect scan leangth...
Switch on power!...
Chain lenght: 14 IR-Chain: 00000000000011 (00000003)
Probing bus ...
Beginning scan chain auto-detection
Device number: '1' Chip ID: 00000000111100000100000000000011 (00F04003)
 *** Unknown or NO Chip ID Detected ***
Done

Processing is stopped now, you must specify new commandline options now:
/skipdetect and /dv:XX with the device number of the CPU found.
/fritzbox/jtag/wrtjp.5.2#

→ generic.debrick