[coreboot] Where to get ME image/flash descriptors for the x220?
cb at imap.cc
cb at imap.cc
Sun Mar 5 15:44:10 CET 2017
There's a lot of useful info here relating to X230 ECs, which may help.
Mostly applicable to the X220 too.
On Sun, 5 Mar 2017, at 14:31, qma ster wrote:
> It should be possible to reflash EC internal firmware through a
> keyboard port, - or maybe through some other debug port that may or
> may not be soldered by default... For example, here is a guide that
> describes how to reflash EC KB9012 internal firmware on Lenovo G505S -
> "AMD based laptop that is supported by coreboot project" ,
> http://dangerousprototypes.com/docs/Flashing_KB9012_with_Bus_Pirate .
> Thanks to this method it is possible to flash a completely clean EC
> KB9012 firmware image, which: 1) does not contain any "secret configs"
> (could be stored in the free place after the firmware) 2) does not
> contain any serial numbers or other specific laptop information ...
> For any EC it is guaranteed that it IS possible to reflash a firmware
> through In-System Programming (direct flashing) - otherwise, 1) how
> the manufacturers flash EC for the first time? ;) 2) if some laptop's
> EC is burned, how do repair shops flash a firmware to a new
> replacement EC?
> Sadly, for this direct flashing method you may need to buy a
> proprietary programmer (closed source hardware/software) , because a
> flashrom does not support every EC in existence
> 2017-03-05 13:20 GMT+03:00 Arthur Heymans <arthur at aheymans.xyz>:
>> "Taiidan at gmx.com" <Taiidan at gmx.com> writes:
>> > Well I managed to download the latest BIOS from the lenovo site,
>> > which includes an ME update now the issue is that I can't seem to
>> > figure out how to extract it from the .FL1 and .FL2 files.
>> Those might have a length too long to fit a flash so you need to trim
>> those down before using ifdtool on those (If they contain and ifd of
>> so depending on size of rom
>> dd if=FL1(or 2)file of=vendor_bios.rom bs=1 count=xM
>> and then ifdtool -x vendor_bios.rom
>> > I would also like to know as to how I can re-flash the EC firmware
>> > if that could potentially cause problems, I of course do not know
>> > if it has DMA.
>> Only existing tool to flash EC is using vendor tool.
>> EC are only accessed trough port mapped IO (or on newer ones
>> also via
>> memory mapped IO). EC itself does not have DMA afaik.
>> Arthur Heymans
>> coreboot mailing list: coreboot at coreboot.org
> coreboot mailing list: coreboot at coreboot.org
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