annotate doc/Calypso-version-override @ 639:026c98f757a6

tpudrv12.h & targets/gtm900.h: our current support is for MGC2GSMT version only As it turns out, there exist two different Huawei-made hw platforms both bearing the marketing name GTM900-B: one is MG01GSMT, the other is MGC2GSMT. The two are NOT fw-compatible: aside from flash chip differences which should be handled by autodetection, the two hw platforms are already known to have different RFFEs with different control signals, and there may be other differences not yet known. Our current gtm900 build target is for MGC2GSMT only; we do not yet have a specimen of MG01GSMT on hand, hence no support for that version will be possible until and unless someone provides one.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 30 Jan 2020 18:19:01 +0000
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1 TI's TCS211 program supported 3 different Calypso silicon versions on their
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2 D-Sample and Leonardo boards: C05B (CHIPSET 8, DSP 33), early C035 (CHIPSET 10,
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3 DSP 34) and final C035 (CHIPSET 10, DSP 36). In FreeCalypso we generally work
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4 only with the last chipset (final C035), but we also support the two earlier
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5 ones to a good extent. C05B has been partially exercised on the Mother's
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6 D-Sample board (non-functional Clara RF, no genuine tpudrv10.c source and too
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7 many unknowns, but at least some of the DSP-based audio services work), whereas
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8 Calypso C035 with DSP 34 has been tested and found to work on a specially
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9 modified FCDEV3B board - see the FCDEV3B-751774 article.
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10
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11 All 3 Calypso chip versions in question are footprint-compatible, i.e., they
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12 can all be populated onto the same PCB. Changing between C05 and C035 requires
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13 changing the VLRTC strapping on the Iota companion chip, thus not all boards
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14 can support Calypso C05 (the newer ones are C035 only), but one can always
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15 populate either early C035 (DSP 34) or final C035 (DSP 36) on the same PCB.
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16 TI's own D-Sample and Leonardo development boards have most certainly been made
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17 with all 3 Calypso silicon versions: D-Sample appears to support both C05 and
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18 C035 on the same PCB; the schematics we have for Leonardo show fixed VLRTC
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19 strapping for C035, but there also existed an earlier Leonardo version with
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20 Calypso C05B. Our own FCDEV3B also has fixed C035-only VLRTC strapping, our
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21 regular boards have final C035 chips on them, but we have put a D751774AGHH
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22 chip on one experimental board for DSP 34 testing.
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23
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24 In the case of target boards that can have different Calypso chip versions
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25 populated on them, we want to be able to target all of them without creating a
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26 configuration explosion. The implemented solution is that you can pass a target
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27 argument to the ./configure.sh script of the following form:
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28
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29 dsample-c05b
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30 dsample-dsp34
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31 dsample-dsp36
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32 leonardo-c05b
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33 leonardo-dsp34
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34 leonardo-dsp36
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35 fcdev3b-dsp34
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36
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37 Our configure.sh script recognizes the hyphen as indicating this construct;
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38 the word before the hyphen must be the conventional target name, and the word
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39 after the hyphen needs to be one of c05b, dsp34 or dsp36, corresponding to the
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40 three supported Calypso silicon versions.