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Marcin Mielczarczyk marcin.mielczarczyk at gmail.comHi Martin, > On the other hand, I have access to very cheap phones using Infineon > PMB7880 (C166 + DSP) or MTK (ARM9) chipsets. Note, that on the market there is much more Mediatek phones based on ARM7 (MT622x) than on ARM9 (MT623x). I mainly focused on MT623x series of Mediatek SoC, which is based on ARM926EJ-S with MMU support. My Linux port for this architecture didn't touch L1 at all. I focused first on getting "application" cpu up and running. This went quite well and then I tried to understand how L1 works. Writing driver for MT6140 helped me understand basics of baseband part of the phone. I managed to configure TX path to transfer data on given frequency and after that I had to have DSP running to send "proper" data. I got stack on DSP part, because I tried first to download firmware from DSP ROM. This didn't work out so far. Better approach would be to disassemble and understand DSP-ARM API and use it as it is, without firmware changing for now. Unfortunately I couldn't find time to work on that due to my professional work. Anyway, all the links are already given in this thread and that's the current status. I described all my findings on OsmocomBB wiki. @Wolfram: I'll probably submit barebox port with update of Mediatek kernel code to 3.2 kernel version. BR, Marcin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20111127/61ef1bc3/attachment.htm>