Black boxes given away with a bt broadband subscription. It comes in two versions Type A and Type B. The two versions look identical, and although they provide similar functionality, they are quite different on the inside.
Type A is made by Thomson, and is broadcom based, using Thomson linux based firmware. Type B is made by SHC (Siemens), and is Infineon/Lantiq Danube based, using OpenRG based linux firmware. Bootloader is u-boot.
The homehub V2 includes ADSL2+, 802.11b/g/n wireless, host USB port, 4 wired ethernet ports, DECT, FXS & FXO ports and VOIP functionality.
The firmware of both units can be successfully hacked for use on other ISPs (see http://openwrt.ebilan.co.uk/). The Type A firmware is a litlte more flexible than the Type B firmware in terms of what can be done after gaining access. However, the Type B can be made to work with OpenWRT.
|Version/Model||Launch Date||S/N||OpenWrt Version Supported||Model Specific Notes|
|Type B||-||Barrier Breaker 14.07||-|
Attitude Adjustment contained a profile for the Type B, but support was incomplete. A community build exists of trunk version 34686 (ie a snapshot shortly before the Attitude Adjustment release). See http://openwrt.ebilan.co.uk/ for details.
The Type B is supported in Barrier Breaker. That is to say, router/modem functionality is fully working. Telephony (DECT and FXO/FXS) is not supported.
|Lantiq Danube@333MHz||64MB||32MB NAND+512k NOR||4||yes||11ng||yes||???||yes||yes|
These instructions assume you are installing Barrier Breaker 14.07 final release, or a recent trunk build (from r42316 onwards). Earlier versions require a different installation procedure.
They also assume you have already unblocked your Home Hub 2B, have updated uboot and have access to the uboot console. If you have not yet done this, see Support and Links section.
The main main flash memory on the Home Hub 2B is nand, not nor, Because of this, ubi is used for bad block management on the root partition. So a squashfs/ubifs overlay is used instead of the standard squashfs/jffs2 overlay image used on most other routers, Similarly, a ubifs image is used instead of a jffs2 image. Also, whereas for most routers OpenWRT consists of a single image containing the the kernel and root filesystem concatenated, for the Home Hub there are two separate files to be flashed, one for the kernel, the other for the (ubinized) root filesytem.
You will need the following files:
openwrt-lantiq-xway-BTHOMEHUBV2B-uImage (kernel image to install)
openwrt-lantiq-xway-BTHOMEHUBV2B-uImage-initramfs (initramfs image, used only during the installation process)
plus one of the following root filesystem images:
openwrt-lantiq-xway-BTHOMEHUBV2B-squashfs-ubinized.bin (squashfs/ubifs overlay)
The following instructions assume you are using the overlay image. Simply replace openwrt-lantiq-xway-BTHOMEHUBV2B-squashfs-ubinized.bin with openwrt-lantiq-xway-BTHOMEHUBV2B-ubifs-ubinized.bin if you prefer to use the pure ubifs image.
Copy kernel images to your tftpboot folder:
cp openwrt-lantiq-xway-BTHOMEHUBV2B-uImage-initramfs /var/lib/tftpboot/ cp openwrt-lantiq-xway-BTHOMEHUBV2B-uImage /var/lib/tftpboot/
Erase the nand flash, preserving only the first 0x4000 bytes which contain calibration data for the wireless card. Then flash the kernel image. From the uboot prompt on the Home Hub:
tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage nand erase 0x004000 0x1ffC000 nand write 81000000 0x004000 0x200000
DO NOT BOOT THIS IMAGE YET! Instead, load the ramdisk image and boot that:
tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage-initramfs bootm 81000000
VERY IMPORTANT! The above lines are only for the very first time that you install a ubi-enabled image. On subsequent occasions you should not erase the whole nand, only the kernel partition, otherwise wear leveling data for the ubi partition will be lost. So for subsequent installs the above five lines become:
tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage nand erase 0x004000 0x200000 nand write 81000000 0x004000 0x200000
tftpboot 81000000 openwrt-lantiq-xway-BTHOMEHUBV2B-uImage-initramfs bootm 81000000
Now use the ramdisk image to flash the root filesystem. Log in to a console on the Home Hub, make sure that the dropbearkey process has finished running and enable ssh by setting a root password.
From the PC, copy the ubinized root filesystem image to the Home Hub (download pscp and use "pscp -scp" instead of just "scp" if you are using Windows):
scp openwrt-lantiq-xway-BTHOMEHUBV2B-squashfs-ubinized.bin firstname.lastname@example.org:/tmp
On the Home Hub, format the ubi partition using the ubi image just copied:
ubidetach -p /dev/mtd7 ubiformat /dev/mtd7 -f /tmp/openwrt-lantiq-xway-BTHOMEHUBV2B-squashfs-ubinized.bin
To boot into OpenWRT automatically, the uboot environment needs to be set up to execute the following commands automatically on power on:
nand read 81000000 0x004000 0x200000 bootm 81000000
You can add this boot options using uboot-envtools package. If this is not already the case, interrupt the boot process and execute them manually from the uboot prompt.
The default openwrt-supplied adsl firmware works well for the majority of people. If, however, you're using a POTS (Annex-A) connection and you suffer from frequent adsl disconnections, it may be worth trying out replacing the standard firmware blob (/lib/firmware/ltq-dsl-fw-a-danube.bin, md5sum: a6c7836e2cc3d26172b15e4732ae636f) with the original BT-distributed firmware blob (md5sum: a8a49c615da9453fe790073c224c5e58). This method has cured the "adsl disconnections" problem for the author of this section, and is documented at http://openwrt.ebilan.co.uk/viewtopic.php?f=4&t=68 (you can download the BT-distributed firmware blob from that location too).
Instructions on how to obtain access to the bootloader can be found here: http://openwrt.ebilan.co.uk/viewtopic.php?f=11&t=6
The unofficial patches used to generate the first fully working images and a community build of trunk r34686 using them can be found here: http://openwrt.ebilan.co.uk/viewtopic.php?f=4&t=3
For reference, the initial work done to get OpenWRT running on the Home Hub 2B is available here:
|NAND - 32 Mbytes:|
|0x00000000-0x00004000 : "Atheros EEPROM"|
|0x00004000-0x00E04000 : "OpenRG Image 1"|
|0x00E04000-0x00F00000 : ? (empty)|
|0x00F00000-0x01D00000 : "OpenRG Image 2 (empty)"|
|0x01D00000-0x01E00000 : ? (empty)|
|0x01E00000-0x02000000 : "Dect configuration? (empty)"|
|NOR - 512k:|
|0x00000000-0x00040000 : first u-boot|
|0x00040000-0x00050000 : u-boot stored config|
|0x00050000-0x00060000 : RG conf 1 16k|
|0x00060000-0x00070000 : RG conf 2 16k|
|0x00070000-0x00080000 : RG factory conf 16k|
in EBU region 0
Sector size 256
nand max floors 1
nand max chips 1
in EBU region 1
|System-On-Chip:||Lantiq Danube PSB-S 50712 (MIPS 24Kec)|
|CPU/Speed:||333 MHz Dual Core|
|NOR Flash:||Spansion S29AL004D 4MiB|
|NAND Flash:||Samsung K9F5608U0D-JIB0 32MiB|
|RAM Chip:||Samsung K4H511638F|
|RAM Specs:||64 MiB|
|Wireless:||Atheros 9160-BC1A 802.11b/g/n, pci, 0x18000000, irq 22|
|Slic:||Teridian 73m1966, Infineon Vinetic PEF4268F 'Ringing SLIC with Integrated DC/DC Converter'|
In the photos above, wires are soldered on to the 3.3v serial lines.
The connections are:
Note that the original u-boot has 'silent' mode enabled
The CPU has 2 x 16 possible GPIO pins.
For each pin there are control bits:
DIR: direction (0=input, 1=output)
IN/OUT: value read from/written to pin
ALTSEL0/ALTSEL1: function multiplexed to the pin (see pinctrl driver)
OD: 0=open drain, 1='normal mode' push-pull
PUDSEL: pullup/down select (1=up)
PUDEN: pullup/down enable (1=enabled)
uboot initial values
|GPIO-01||0 in||1||1||0||1||0||0||FXO Interrupt|
|GPIO-02||0 in||1||0||0||1||0||0||Reset button|
|GPIO-03||1 out||1||0||0||1||0||0||CLK-OUT2 - (25mhz for amd9669i? - danube_clock.c in u-boot)|
|GPIO-04||1 out||1||1||0||1||0||0||- stp-st (maybe also likely boot clock select 1 = 36mhz)|
|GPIO-05||1 out||1||1||0||1||0||0||- stp-d|
|GPIO-06||1 out||1||1||0||1||0||0||- stp-sh|
|GPIO-09||1 out||1||0||1||1||0||0||- FXO Chip Select|
|GPIO-10||1 out||0||0||0||1||0||0||- FXO reset|
|GPIO-11||0 in||1||1||0||0||1||1||- pulled up|
|GPIO-13||1 out||1||1||0||1||0||0||- USB Power|
|GPIO-15||0 in||1||0||0||0||0||0||- find handset button|
|GPIO-20||1 out||1||0||0||1||1||1||- pulled up|
|GPIO-21||1 out||0||0||0||1||0||0||- PCI Reset|
|GPIO-22||0 in||1||0||0||1||1||1||- wps button pulled up|
|GPIO-23||1 out||1||1||0||1||0||0||- likely endian select 0=little|
|GPIO-27||1 out||1||1||0||0||1||1||- pulled up|
|GPIO-28||1 out||1||0||0||0||0||0||- SC14488 dect chip reset|
|GPIO-29||1 out||1||0||0||1||0||0||- pci-req1|
|GPIO-30||1 out||0||0||0||1||0||0||- pci-gnt1|
USB Power? 13
from original bootlog: FXO reset using GPIO-10 FXO interrupt using GPIO-1 FXO Chip Select using GPIO-9
from u-boot, initial values are:
The board provides a further 24? GPOs (for leds) controlled by stp.
All buttons are active low.
There is also a recessed reset button. If anyone can find out what gpio it is connected to, please update this page.
Near the 11 leds, there are two HC595: 8-Bit Serial-Input/Serial or Parallel-Output Shift Register with Latched 3-State Outputs (http://pdf1.alldatasheet.com/datasheet-pdf/view/46165/SLS/HC595.html)
|The leds are grouped|
|3 for Power|
|3 for Broadband|
|2 for phone|
|2 for wireless|
|1 for upgrading|
LED control base address is 0xBE100BB0 which correlates with ltq_register_gpio_stp.
|Upgrading||Orange||= bit 13 (213 with 200 base added)|
|Phone||Orange||= bit 14 (214)|
|Blue||= bit 15 (215)|
|Wireless||Orange||= bit 16 (216)|
|Blue||= bit 17 (217)|
|Broadband||Red||= bit 18 (218)|
|Orange||= bit 19 (219)|
|Blue||= bit 20 (220)|
|Power||Red||= bit 21 (221)|
|Orange||= bit 22 (222)|
|Blue||= bit 23 (223)|
Atheros 9160-BC1A 802.11b/g/n, pci, 0x18000000, irq 22, slot 14
Marked as device 168C:FF1C
The calibration data is stored in the first 0x4000 bytes of the nand
the first 0x60 of these contain PCI register fixups, organised as Reg16:Value32. These need to be written to the PCI register space BEFORE the PCI device is probed… Support for this is now in trunk (Barrier Breaker).
unfortunately, wireless (PCI) and NAND (EBU) interact. for the moment, PCI gets inhibited while the nand chip is selected; I felt it better to have some wireless degradation rather than file system corruption.
The FXO/FXS interface for telephony is a combination of Teridian 73m1966 and Infineon Vinetic PEF4268F 'Ringing SLIC with Integrated DC/DC Converter', for which some drivers are available. I believe that as I write, some work may be being done on using SIP with the telephone interfaces.
The DECT modem (SiTel SC14488) is a processor in it's own right. It is connected to ttyLTQ0, and also to Danube PCM Lines? We would need firmware to run within the SiTel modem to talk to the Dect phones, and to understand the protocols on the serial control, as well as implement the PCM communication (which seems to be DMAed). There is an un-populated site for a serial eeprom? - so the firmware must be programmed by the main cpu at startup.
Although we have the original BT firmware for the DECT modem, there is little or no information regarding how this may be controlled. The control seems to be done from within the OpenRG application, for which we have no source.