[OpenWrt-Devel] lantiq DSL drivers / firmware info

[John Crispin]

Hi,

On 15/08/2015 23:38, Mathias Kresin wrote:
> Am 24.07.2015 um 01:20 schrieb Martin Blumenstingl:
>> On Fri, Jul 24, 2015 at 1:00 AM, Aleksander Wałęski
>> <olewales at gmail.com> wrote:
>>> Actually, it just dawned on me that they can be doing just that. In
>>> the bootloader. This is the only part of firmware we are not changing.
>>> If PCBs turn out to be identical we might want to check this.
>> That was my first guess, but I am using the open source u-boot version
>> on the BT Home Hub 5A (= Annex A device) and it still refuses to
>> connect to Annex B (at least back when I tried last, I switched to
>> VDSL like two months ago).
> 
> I can confirm that it is unrelated to the bootloader. I crossflashed my
> Annex A W8980v1 with the W9980B (Annex B) firmware. During crossflash,
> the bootloader is updated as well. Afterwards, I do get exactly the same
> error message as Andre:
> 
> xDSL Leave SHOWTIME!!
> DSL_CPE: Wrong combination of DSL PHY Firmware and hybrid type used!

this line above says it all ... here is a bit of tech background.

Annex-A is when you run dsl on an analogue phone line
Annex-B is when you run dsl on a digital phone line

For this to work the dsl has a so called hybrid. consider it like a
frequency filter. The hybrid dictates which firmware is required and
what line you can run it on. running an annex-a unit will only ever work
with an annex-a firmware on a POTS line. a annex-b hybrid will require a
annex-b firmware and an ISDN line.

	John


> Please change one of it.
> nReturn=0 nData="E843 0003 0001 0009 "
> nReturn=0 nData="5048 0000 0001 "
> nReturn=0 nData="1762 0000 0001 "
> 
> I did not connected the device to an Annex B ADSL line yet, but I guess
> the result will be the same.
> 
> Furthermore, I replaced the content of mtd4 at f200 (@f100 is the device
> mac address stored) and mtd5 with a bunch of 0x11, to test for a magic
> value, that is read from there. U-boot replaces the content of mtd5 with
> the ddr params right after reboot and neither the error message changes
> if a W9980B firmware is booted, nor an error message appears if a W9980
> firmware is booted. The content of mtd6 seams to be unrelated to me,
> since it contains the ath calibration data.
> 
> I share Daniels guess, that there could be a resistor, which locks the
> VRX208 to Annex A/Annex B ADSL mode. As already mentioned, it's
> unrelated to VDSL. My Annex B VDSL line works with the W9980B (and
> properly W9980) firmware out of the box.
> 
>> If you can figure out where the boot_sel pins are (similar to [0] or
>> [1]) to get it into CFG04 mode (= boot via UART) then I can add a
>> patch for Daniel Schwierzeck's open source lantiq u-boot. But be
>> aware: you need to pull some of them HIGH (= 3.3V, *NOT* 5V) - you
>> could damage your device by pulling the wrong pin HIGH.
> 
> I found the location of the boot_sel pin and have updated the W8980v1
> wiki page.
> 
> Mathias
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