Hi,
This patchset is to implement AMDTP domain I addressed in my previous patchset: https://mailman.alsa-project.org/pipermail/alsa-devel/2019-July/152430.html
My work for libhinoko[1][2] allows me to sniff actual packet transmission between devices and drivers in Windows/Mac OS for long period (e.g. 1 hour). As a result, some supported devices don't follow packet sequences transferred by the drivers. They expect drivers to parse isoc packets in tx stream and recover frequency of data block then transfer isoc packets as rx stream.
(I note that no specification describes this mechanism as long as I know. In the specification, clock recovery is one-way from transmitter to receivers, thus recovered clock is not necessarily used for transmission from the receiver to the transmitter.)
For the clock recovery in driver side, several isoc contexts should be handled in one time to parse packets in incoming stream and to build packets in outgoing stream. The AMDTP domain is designed for this purpose.
In this time, the AMDTP domain implements the functionalities to start/stop a couple of isoc contexts for some AMDTP streams. Each context still runs in own handler for scheduled hardware IRQs. I'll post further work after merged.
[1] https://mailman.alsa-project.org/pipermail/alsa-devel/2019-April/147862.html [2] https://github.com/takaswie/libhinoko
Takashi Sakamoto (19): ALSA: firewire-lib: add AMDTP domain structure to handle several isoc context in one interrupt callback ALSA: firewire-lib: add a kernel API to stop a couple of AMDTP streams in AMDTP domain ALSA: firewire-lib: add a kernel API to add AMDTP stream into AMDTP domain ALSA: firewire-lib: add a kernel API to start AMDTP streams in AMDTP domain ALSA: fireworks: code refactoring for initialization/destruction of AMDTP streams ALSA: fireworks: code refactoring for bus reset handler ALSA: firewire-digi00x: code refactoring for initialization/destruction of AMDTP stream ALSA: firewire-tascam: code refactoring for initialization/destruction of AMDTP stream ALSA: firewire-motu: code refactoring for initialization/destruction of AMDTP stream ALSA: fireface: code refactoring for initialization/destruction of AMDTP stream ALSA: bebob: support AMDTP domain ALSA: fireworks: support AMDTP domain ALSA: oxfw: support AMDTP domain ALSA: dice: support AMDTP domain ALSA: firewire-digi00x: support AMDTP domain ALSA: firewire-tascam: support AMDTP domain ALSA: firewire-motu: support AMDTP domain ALSA: fireface: support AMDTP domain ALSA: firewire-lib: localize kernel APIs to start/stop each AMDTP stream
sound/firewire/amdtp-stream.c | 94 ++++++++++- sound/firewire/amdtp-stream.h | 20 ++- sound/firewire/bebob/bebob.h | 2 + sound/firewire/bebob/bebob_stream.c | 62 +++---- sound/firewire/dice/dice-stream.c | 32 +++- sound/firewire/dice/dice.h | 2 + sound/firewire/digi00x/digi00x-stream.c | 106 +++++++----- sound/firewire/digi00x/digi00x.h | 2 + sound/firewire/fireface/ff-stream.c | 96 ++++++----- sound/firewire/fireface/ff.h | 2 + sound/firewire/fireworks/fireworks.h | 2 + sound/firewire/fireworks/fireworks_stream.c | 176 ++++++++++---------- sound/firewire/motu/motu-stream.c | 131 +++++++-------- sound/firewire/motu/motu.h | 2 + sound/firewire/oxfw/oxfw-stream.c | 72 ++++---- sound/firewire/oxfw/oxfw.h | 2 + sound/firewire/tascam/tascam-stream.c | 123 ++++++++------ sound/firewire/tascam/tascam.h | 2 + 18 files changed, 558 insertions(+), 370 deletions(-)