Successful TomTom Visit
As indicated before, TomTom B.V. has invited Christian and me to visit them at
their offices. Apart from some consulting/training regarding Free Software
Licenses and the Free Software Community, they were particularly interested in
getting us involved with their Linux kernel related development.
I stressed the fact that it is very important to clean up all the drivers, make
them use standard interfaces and eventually get them merged to the mainline
kernel. As it seems, they agree and want to contract one or some of the
OpenTom developers to do so.
No more time for OpenTom at the moment
Due to an increasing workload, I won't be able to work on the OpenTom project for at least some weeks. I've published the current state of the SD Card driver in my personal directory of the OpenTom Subversion repository. If you want to pick up, feel free. I'll answer questions by email.
More hacking on the SD Card driver
re-engineering the SD card stuff turns out to be more time consuming than
expected. Not that it's particularly fancy or complicated - just obfuscated.
Apparently there are some quite complex data structures involved, that are hard
to analyze by looking at the disassembly.
We've put together some information on our OpenTom efforts at wiki.opentom.org. Feel free to check it
out. Additions of content very welcome :)
The OpenTom Project was founded
Our distributed efforts in opening up the TomTom GO have now found a common home, the
opentom.org domain. There's the OpenTom
website and the svn.opentom.org subversion server.
There's still a lot under construction, expect more news here in this blog and
in the subversion repository.
2.6.10-rc1 kernel for OpenTom
Christian Daniel has managed to get
2.6.10-rc1 running on the TomTom GO. This includes a 2.6.x-rewritten frame buffer driver, USB Host and Device support.
The kernel tree has been made available on svn.opentom.org.
All GPL issues with TomTom B.V. settled
I'm very happy that the GPL issues with TomTom have now all been settled, and
despite some early disagreements we're now very happy with the way TomTom has
handled this case.
The TomTom GPL page contains the latest
source of their 4.42 firmware. Pretty much all of the drivers have been
released with their source code (touch-screen, framebuffer, USB device,
accelerometer, GPS). Only (obviously) the SD-Card driver is missing in the
source and provided as kernel module. This is due to the stupid SD Card
Alliance licensing agreement, which basically puts every recipient of the
Documentation under an NDA.
So at the moment you have to put all of the OS into the initrd, which is loaded by the bootloader.
We're working on a solution for the card reader, though. At least MMC Card
support should be available soon.