Hello Om community, I am very pleased to announce that after many years of searching, I have finally found a copy of TI's firmware deliverable package for their Leonardo development board, i.e., for their Calypso/Iota/Rita chipset reference platform. It is the package which TI must have given to all of their chipset customers including Nokia, Motorola, Compal, FIC/Openmoko, LG, BenQ and many others, and which was used by all of these companies as the starting point for making their unique proprietary firmwares. This Leonardo firmware source can be found here:
ftp://ftp.ifctf.org/pub/GSM/TI_src/Sotovik/ It is a source with some object blobs unfortunately (but that was expected), but it is complete in that one can build a functional fw image from the included sources and object libraries. This original code will NOT run on a GTA0x modem; it runs on the Leonardo board instead. If you are curious as to what the Leonardo board looks like, you can see a picture of it on page 10 of this TI document: ftp://ftp.ifctf.org/pub/GSM/Calypso/chipsets+refdesigns.pdf However, I have known for a long time that Om's GSM modem is actually very close to the Leonardo board in terms of how the Calypso/Iota/RF chip interconnections are wired. (I already knew this fact ~2y ago when I first saw the doc/calypso-signals.txt file in the OsmocomBB git tree - read that text file and judge for yourselves.) The implication from this hardware similarity is that it should be quite easy to take firmware code that runs on the Leonardo board and port it to run on the GTA0x modem instead. I have just proven the above hypothesis by producing a leo2moko port, i.e., a port from Leonardo to moko. You can find the Wine-buildable source here: ftp://ftp.ifctf.org/pub/GSM/FreeCalypso/ You can build that source under Wine (see instructions in the README file inside the tarball) and produce an S-record image which you can then flash into your GTA0x GSM modem with fc-loadtool - the latter is my free replacement for TI's proprietary FLUID. My own limited experiments indicate that this firmware is able to dial voice calls (makes the other party's phone ring), receive voice calls (I dial the number of the test SIM card in my GTA02 and see RING messages appearing in the AT command channel), and even make CSD (circuit-switched data) calls successfully - being the outlaw that I am, I take great joy in playing with CSD (which I plan on using for encrypted voice further down the road) and thereby showing my middle finger to the NSA etc. However, I have NOT fully tested the "normal" voice call operation: I have only verified that the fw places and answers these calls, but I haven't tested the actual voice audio. The latter omission exists because I have very poor understanding of the Linux-based software that needs to run on the GTA0x AP, and on my test GTA02 I run a very minimal buildroot environment on the AP. I have not yet figured out how to configure the AP-controlled audio system to pass the voice path between the GSM modem and the physical earpiece and mic, hence my current inability to test this voice path. Therefore, I encourage other community members to play with this firmware and see if it actually works end-to-end for voice calls. Viva la Revolucion, SF _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
