FreeCalypso > hg > fc-tourmaline
annotate doc/Modem-operation @ 221:5bf097aeaad7
LLS: when turning off all LEDs on boot, skip LED-C
Having LLS turn off LED-A and LED-B on boot is normally unnecessary
(they should already be off in Iota), but it is harmless, hence this
logic is kept for robustness. However, having LLS read-modify-write
the BCICTL2 register (to turn off LED-C) creates a potential race
condition with FCHG writes to this register, especially in the case
when baseband switch-on is caused by VCHG and charging is expected
to start right away. Furthermore, control of the charging LED itself
(on those hw targets that have it) is the responsibility of the FCHG
SWE, hence LLS should leave it alone.
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Mon, 26 Apr 2021 21:55:13 +0000 |
parents | a62e5bf88434 |
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rev | line source |
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a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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1 FC Tourmaline stdmodem functional configuration is equivalent to Magnetite |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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2 hybrid. The only intentional diff from Magnetite to Tourmaline in the modem |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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3 configuration is the change of Nucleus: Magnetite uses the blob version of |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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4 Nucleus which came with TCS211-20070608, whereas Tourmaline uses the source |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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changeset
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5 version of Nucleus by Comrade XVilka. It is essentially a change from an |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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6 unknown version of Nucleus to a known one, thus it should generally be |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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7 considered an improvement - but as always with such changes, extensive |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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8 verification and testing needs to be done in order to ensure that nothing got |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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9 broken. |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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10 |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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11 Aside from the one intentional change of Nucleus version, FC Tourmaline is an |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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12 entirely new firmware source tree, thus it is always possible that something |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
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13 could have got broken unintentionally, particularly in rarely-tested areas of |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
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14 the firmware. Therefore, extensive testing will need to be done before we can |
a62e5bf88434
first round of documentation
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
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15 declare Tourmaline stdmodem as officially replacing Magnetite hybrid for stable |
a62e5bf88434
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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16 modem products. |