FreeCalypso > hg > fc-tourmaline

annotate README @ 275:79cfefc1e2b4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
audio mode load: gracefully handle mode files of wrong AEC version Unfortunately our change of enabling L1_NEW_AEC (which is necessary in order to bring our Calypso ARM fw into match with the underlying DSP reality) brings along a change in the audio mode file binary format and file size - all those new tunable AEC parameters do need to be stored somewhere, after all. But we already have existing mode files in the old format, and setting AEC config to garbage when loading old audio modes (which is what would happen without the present change) is not an appealing proposition. The solution implemented in the present change is as follows: the audio mode loading code checks the file size, and if it differs from the active version of T_AUDIO_MODE, the T_AUDIO_AEC_CFG structure is cleared - set to the default (disabled AEC) for the compiled type of AEC. We got lucky in that this varying T_AUDIO_AEC_CFG structure sits at the end of T_AUDIO_MODE!
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 30 Jul 2021 02:55:48 +0000
parents a62e5bf88434
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
50
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 FreeCalypso Tourmaline firmware project
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 =======================================
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 In chronological terms, FC Tourmaline is our fourth firmware offering after
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 Citrine, Magnetite and Selenite. FC Tourmaline supports the following two
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 fundamental modes of operation:
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 * AT-command-controlled modem operation (no UI) is currently unchanged from
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 Magnetite hybrid; standard modem operation is supported on Tango/Caramel2,
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 FCDEV3B and Openmoko hardware targets.
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 * The new work being done in Tourmaline is phone handset functionality - the
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 goal is to produce firmware that can operate a suitable hardware unit as an
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 untethered end user phone. Only two hardware targets are supported in this
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 FC Tourmaline handset UI development venture: FC Luna development platform
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 and Motorola C139.
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 See the following articles under doc for further details:
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 C139-notes -- running smallbw version of the UI on Mot C139
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 Luna-notes -- running both UI versions on FC Luna
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 Modem-operation -- using the modem configuration
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 Technical details
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 =================
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 Just like FC Selenite, Tourmaline is derived from the hybrid config of
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 Magnetite. Also in common with Selenite, Tourmaline uses the new source
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 version of Nucleus. However, unlike Selenite, Tourmaline retains sole use of
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 the original TMS470 compiler (runs under Wine), retains the original blob
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 versions of OSL and OSX glue components of GPF in the default config (see
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 doc/Blob-status), and includes both modem and handset functional configs.
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 Purpose and goal
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 ================
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 As of late 2020, FreeCalypso has achieved everything that needs to be done on
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 the modem side: our Magnetite hybrid or Tourmaline stdmodem firmware running on
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 our Tango modem module embodies complete fulfillment of our long-standing desire
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 for a standard GSM+GPRS modem module with fully published circuit schematics and
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 firmware source code. No more significant work beyond maintenance is deemed to
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 be needed on the modem side.
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 OTOH, the other need for a FreeCalypso handset that can replace proprietary
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 phones like Mot C1xx or Pirelli DP-L10 running their original proprietary fw
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 still remains as unmet as it was when we started back in 2013. Thus the new
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 FreeCalypso work direction is to finally produce this FC handset, initially in
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 the form of FC firmware running on Mot C139 (and on FC Luna to keep up the
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 bigcolor config) and allowing the possibility of new FreeCalypso handset hw.
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51 Seen from the perspective of handset rather than modem functionality, the
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52 direction taken in Citrine and Selenite (going for 100% blob-free compilation
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53 with gcc) is the wrong way to go. That direction would make sense if one cared
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 only about modem functionality rather than handset, but we are currently in the
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 opposite situation. In the case of handset functionality, going for a compiler
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 change to gcc in our current state when so many other parts are broken and in
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 need of fixing would be pure insanity, and we are not going there. Let us
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 first produce a working FreeCalypso handset (with fw compiled with TMS470 under
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 Wine, keeping the tiny remaining blobs) that can replace Mot/Pirelli's original
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 proprietary firmwares for daily use, and *then* think about moving to 100%
a62e5bf88434 first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 blob-free gcc - in this order.