FreeCalypso > hg > fc-tourmaline
annotate README @ 288:25d3ee009d19
audio tone amplitudes: band-aid fix for FC Luna
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 13 Nov 2021 05:02:57 +0000 |
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1 FreeCalypso Tourmaline firmware project |
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2 ======================================= |
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3 |
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4 In chronological terms, FC Tourmaline is our fourth firmware offering after |
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5 Citrine, Magnetite and Selenite. FC Tourmaline supports the following two |
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6 fundamental modes of operation: |
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7 |
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8 * AT-command-controlled modem operation (no UI) is currently unchanged from |
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9 Magnetite hybrid; standard modem operation is supported on Tango/Caramel2, |
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10 FCDEV3B and Openmoko hardware targets. |
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11 |
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12 * The new work being done in Tourmaline is phone handset functionality - the |
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13 goal is to produce firmware that can operate a suitable hardware unit as an |
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14 untethered end user phone. Only two hardware targets are supported in this |
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15 FC Tourmaline handset UI development venture: FC Luna development platform |
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16 and Motorola C139. |
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17 |
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18 See the following articles under doc for further details: |
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19 |
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20 C139-notes -- running smallbw version of the UI on Mot C139 |
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21 Luna-notes -- running both UI versions on FC Luna |
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22 Modem-operation -- using the modem configuration |
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23 |
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24 Technical details |
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25 ================= |
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26 |
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27 Just like FC Selenite, Tourmaline is derived from the hybrid config of |
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28 Magnetite. Also in common with Selenite, Tourmaline uses the new source |
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29 version of Nucleus. However, unlike Selenite, Tourmaline retains sole use of |
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30 the original TMS470 compiler (runs under Wine), retains the original blob |
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31 versions of OSL and OSX glue components of GPF in the default config (see |
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32 doc/Blob-status), and includes both modem and handset functional configs. |
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33 |
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34 Purpose and goal |
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35 ================ |
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36 |
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37 As of late 2020, FreeCalypso has achieved everything that needs to be done on |
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38 the modem side: our Magnetite hybrid or Tourmaline stdmodem firmware running on |
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39 our Tango modem module embodies complete fulfillment of our long-standing desire |
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40 for a standard GSM+GPRS modem module with fully published circuit schematics and |
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41 firmware source code. No more significant work beyond maintenance is deemed to |
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42 be needed on the modem side. |
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43 |
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44 OTOH, the other need for a FreeCalypso handset that can replace proprietary |
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45 phones like Mot C1xx or Pirelli DP-L10 running their original proprietary fw |
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46 still remains as unmet as it was when we started back in 2013. Thus the new |
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47 FreeCalypso work direction is to finally produce this FC handset, initially in |
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48 the form of FC firmware running on Mot C139 (and on FC Luna to keep up the |
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49 bigcolor config) and allowing the possibility of new FreeCalypso handset hw. |
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50 |
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51 Seen from the perspective of handset rather than modem functionality, the |
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52 direction taken in Citrine and Selenite (going for 100% blob-free compilation |
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53 with gcc) is the wrong way to go. That direction would make sense if one cared |
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54 only about modem functionality rather than handset, but we are currently in the |
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55 opposite situation. In the case of handset functionality, going for a compiler |
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56 change to gcc in our current state when so many other parts are broken and in |
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57 need of fixing would be pure insanity, and we are not going there. Let us |
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58 first produce a working FreeCalypso handset (with fw compiled with TMS470 under |
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59 Wine, keeping the tiny remaining blobs) that can replace Mot/Pirelli's original |
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60 proprietary firmwares for daily use, and *then* think about moving to 100% |
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61 blob-free gcc - in this order. |