ALSA: firewire-tascam: add support for outgoing MIDI messages by asynchronous transaction

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TASCAM FireWire series use asynchronous transaction to receive MIDI
messages. The transaction should be sent to a certain address.

This commit supports the outgoing MIDI messages. The messages in the
transaction includes some quirks:
 * One MIDI message is transferred in one quadlet transaction, except for
   system exclusives.
 * MIDI running status is not allowed, thus transactions always include
   status byte.
 * The basic data format is the same as transferring MIDI messages
   supported in previous commit.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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This commit is contained in:

Takashi Sakamoto 2015-10-12 19:10:22 +09:00 • committed by Takashi Iwai

parent 107cc0129a

commit 3beab0f844

2 changed files with 102 additions and 1 deletions

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95

sound/firewire/tascam/tascam-transaction.c

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8

sound/firewire/tascam/tascam.h

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