Hi,
Le vendredi 09 février 2018 à 14:33 -0500, Youness Alaoui a écrit :
On Tue, Feb 6, 2018 at 4:41 AM, Mike Banon mikebdp2@gmail.com
wrote:
Thank you very much for telling about EC-1.75 project!
http://dev.laptop.org/git/users/rsmith/ec-1.75/tree/?h=3930-A1
Maybe some of its' elements could be borrowed for Origami
if the hardware is similar? (haven't compared the datasheets)
There will probably be some things in common. I don't know how much
of
ec-1.75 is good enough to be reused though, or if it's maintainable,
etc.. but yes, it could be a good starting point.
There is indeed a lot in common with that code, but the code itself is
not structured and organized at all so reusing the codebase makes very
little sense. I mostly use this code for reference and it has already
proven useful (e.g. for special trickery that has to be implemented
when going to low power mode).
@ Youness and Marty :
Proprietary firmware of KB9012 explicitly disables EDI - ENE Debug
Interface
(the protocol used to access the internal memory of KB9012) unless
pin
42 is grounded
_before_ powering the KB9012 controller ! Maybe its the same with
your
another KB ?
If you ground that pin (not necessarily 42, your KB's pin number
could
be different)
to put your EC into debug mode, maybe then you could successfully
read/write it ?
Here is the full description of my successful KB9012 hardware
flashing setup
through the keyboard port using a flex cable with soldered wires:
0.5mm pitch
makes it hard to solder directly to keyboard port, and also I like
flex cable solution
because its much faster to remove/insert a cable than to
solder/desolder the wires
http://dangerousprototypes.com/docs/Flashing_KB9012_with_Bus_Pirate
^^^ Had to unite three grounds ( programmer's, mainboard's and
KB9012's 42 pin )
to make it work
Currently we are actively working on the inclusion of KB9012
flashing support
to the official flashrom - but its already possible via the
unofficial patches.
Changes 23258 - 23263 at the https://review.coreboot.org/#/q/projec
t:flashrom
Note that the patches have been merged at this point, so ENE EDI
support in flashrom is now ready. I am also wondering about using
libflashrom to write an EDI debugger (since, after all, EDI has access
to the whole external memory).
I haven't compared the datasheets of KB9012 and your KB, so I don't
know
if they are using exactly the same debug interface or it is
slightly different
(please check if there are differences, maybe you'll have to write
some code)
I trust hardware flashing more than the software, especially your
current AMI BIOS setup
which isn't free software. Maybe the direct hardware flashing is
also
possible for you
Sure, you can trust hardware flashing more than software flashing,
but
I really need software flashing. If it was just for me, yeah, I could
fiddle with it to flash it by hardware for my personal needs, but
when
it's about deploying it to all our customer base, that's another
story, the only solution is software flashing. Obviously, it would
have to work in coreboot, so whatever coreboot is doing wrong (or AMI
is doing right.. my guess is that it's probably something with the EC
ACPI code), we'd have to figure that out first in order to get the
read/write support.
Either way, since the EC firmware resides in the SPI flash, it'll be no
issue to reflash it both by software and hardware.
Latest status update for Origami-EC firmware:
https://www.mail-archive.com/coreboot@coreboot.org/msg50646.html
Thanks! Good to see the status update on that.
In order to kickstart the development of the Origami-EC firmware, I am
designing evaluation boards for both the KB9012 and the KB3930 that
will expose most of the I/O ports with headers, LEDs, buttons,
connectors, etc. The design is done with KiCAD and will be released
under the GPLv3+ as part of the Origami-EC project. I am also preparing
a debug board to reflash the EC on the G505s from the keyboard
connector.
There is also ongoing work on the emulator and the SerialICE-like
library for relatying and tracing I/O on the device via UART. Also,
note that the emulator can now emulate a virtual console so it's
already possible to build and interract with the firmware!
Cheers,
Paul
On Mon, Feb 5, 2018 at 9:47 PM, Youness Alaoui
kakaroto@kakaroto.homelinux.net wrote:
Hi Marty,
Unfortunately, the EC firmware on the Librems is not open and we
have
someone working on that aspect, but with everything we have to
handle,
I think it's only being done part time.
We found something similar to you with the private submodule for
the
PS/2 module on the OLPC code.
More specifically :
http://lists.laptop.org/pipermail/openec/2011-January/000158.html
And http://dev.laptop.org/git/users/rsmith/ec-1.75/tree/?h=3930-A
1
I had opened a ticket a while ago here :
https://tracker.pureos.net/T178 which mentions Origami-EC. I
don't
know the status of that project, maybe you can contact the
developer
(Paul Kocialkowski) and see where he's at with his development of
that
project (which, I need to mention, hasn't been publicly launched
yet,
as far as I know) and he might benefit from your help if you are
interested in doing that.
The last time we spoke he said :
"The OLPC code is nowhere close to usable on any other platform.
Additionally, it is so poorly written that I don't think it is a
suitable codebase for any future development. On the other hand,
my
Origami-EC project (that I will publicly launch soon) should
provide a
flexible codebase to add support for new devices."
Note that the tracker ticket above is quite outdated, we know how
to
dump the EC (the problem was that it can't be done via hardware
because the EC is on the same power rail as the 64KB flash chip,
so
when we power the flash via hardware, the EC boots and takes
control
of the SPI lines) but for some reason, we could only dump it via
software (using ectool) through the AMI BIOS firmware, with
coreboot,
we only get 0xFF returned, I don't believe we had time to
investigate
the cause for that.
Sorry for not having any better news for you, but I hope this
helps a
little you at least.
Good luck,
Youness.
On Fri, Feb 2, 2018 at 10:17 AM, Marty E. Plummer
hanetzer@startmail.com wrote:
Greetings,
Currently working on a port for the hp g7-2247us laptop, which
features
an ene kb3940q ec, which hopefully should be very similar to
the kb3930
ec, which has a datasheet available to the public in a few
places.
Said similar ec is used in some OLPC devices, as well as some
purism
devices, and I was hoping someone in the list would have some
contacts
with those guys so as to be able to use their ec firmware as a
bit of a
reference design, but the OLPC ec firmware repo has a 'private'
submodule which I cannot access and I simply cannot find a repo
for the
purism ec firmware to reference.
Any assistance you could provide on this matter would be
greatly
appreciated.
Marty E. Plummer
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Website:
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