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Tapping the internal microphones #259

Merged
merged 20 commits into from
Nov 4, 2022
Merged

Tapping the internal microphones #259

merged 20 commits into from
Nov 4, 2022

Commits on Oct 23, 2022

  1. m1n1.utils: Fix chexundump exception 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  2. m1n1.utils: Skip empty lines on chexundump input 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  3. m1n1.utils: Accept 'base' in chexundump 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  4. m1n1.hw.admac: Add CHAN_SRAM_CARVEOUT registers 

    The new registers contain SRAM limits allocated to each channel.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  5. tools/admac_stream.py: Add tool for engaging ADMAC 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  6. m1n1.fw.afk: Fix TX/RX_BUFSIZE confusion 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  7. m1n1.trace: Drop stale super().__init__() call 

    The Reloadable parent doesn't have an __init__ method, so calling the
super may call at unexpected places in richer inheritance hierarchies.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  8. m1n1.hw.dart: Pass in kwargs arguments of from_adt() 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  9. m1n1.proxyutils: Accept M1N1HEAP environment variable 

    Let user override the proxyutils heap base for concurrent running of two
proxyclient sessions.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  10. m1n1.hw.adt: Add prop parsing rules related to AOP audio 

    We need to adapt the prop-parsing logic to give precedence to path
matching over name matching, since otherwise the audio-* rule (which is
already in the list) catches (...)/aop-audio/audio-pdm2. We want that
to fall under *aop-audio* rule instead.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  11. m1n1.fw.afk: Accept AOP buffer magic 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  12. experiments/aop.py: Work around ADT inconsistencies 

    In t6000 ADT, the AOP SRAM base is specified *including* the bus offset
where the bus offset isn't expected, so our decoding of it includes the
bus offset twice. Patch it.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  13. m1n1.fw.aop: Split off ASCArgumentSection from experiments/aop.py 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  14. experiments/aop.py: Make _bootargs_span a property 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  15. experiments/aop.py: Allocate oslog buffer on request 

    We need to allocate a buffer for the AOP on the OSLog endpoint for it to
fully boot. Copy in a modified version of the general OSLog endpoint
driver to do that.

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  16. m1n1.fw.aop: Move bootargs helpers to new class AOPBase 

    The new class can possibly be shared between the m1n1 AOP tracer and
AOP client.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  17. m1n1.fw.aop: Tweak bootargs diff format 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  18. m1n1.fw.aop: In AOPBase only refer to ProxyUtils attribute 

    Signed-off-by: Martin Povišer <povik@protonmail.com>
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  19. experiments/aop.py: Extend AOP experiment, add tracer 

    The AOP uses an 'EPIC' protocol similar to the one other coprocessor
firmware is using but not in the exact same version. Add code for
tracing the AOP calls and extend the aop.py experiment with the client
side of it. Include description of audio calls and some other calls
related to sensor discovery.

Furthermore, in experiments/aop.py, do some AOP audio setup. Once that
is done we can start streaming samples from the internal microphones by
making what AOP considers power state adjustment calls. That is, we
adjust the power state of a 'hpai' device, first to a 'pw1 ' stage,
then to 'pwrd' stage.

So, to see microphone samples, enter the AOP experiment shell first:

  $ M1N1DEVICE=/dev/ttyACM0 experiments/aop.py

Within the shell, adjust the power state of 'hpai':

  >>> aop_set_audio_pstate('hpai', 'pw1 ')

At that point /arm-io/admac-aop-audio powers up. In parallel to the AOP
shell, we can start tools/admac_stream.py on the just powered-up ADMAC
instance:

  $ M1N1HEAP=0x10010000000 M1N1DEVICE=/dev/ttyACM1 tools/admac_stream.py \
        --node admac-aop-audio --channel 1 -v | xxd -g 4 -c 12 -e

Returning back to the AOP shell, we can then set 'hpai' to 'pwrd' state
to kick off the streaming:

  >>> aop_set_audio_pstate('hpai', 'pwrd')

By that point, we should see samples coming out on the ADMAC end. The
samples are 32-bit floats packed in groups of three in a frame, e.g.

00000000: ba7ac6a7 ba32d3c3 baa17ae2  ..z...2..z..
0000000c: 38ccea5f b99c1a37 ba0c4bb1  _..87....K..
00000018: 39d2354f 3964b5ff 39b209fb  O5.9..d9...9
00000024: b96a1d1f 39c8503f 3958fc4f  ..j.?P.9O.X9
00000030: b6b1f5ff 39c72b8f 39bbe017  .....+.9...9
0000003c: 3a912de5 36dd4f7f 37f1147f  .-.:.O.6...7

This has been tested and will to some degree be specific to 2021 Macbook
Pro (t6000). Differences on other models TBD (at the very least the
number of microphones can be presumed different).

Signed-off-by: Martin Povišer <povik@protonmail.com>
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  20. experiments/mmio_sweep.py: Patch in AOP power-domains on t6000 

    The ADT lacks some of the info on AOP power domains on t6000, so fill
that in manually.

Signed-off-by: Martin Povišer <povik@protonmail.com>
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