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| author | Takashi Sakamoto | 2019-01-22 14:17:05 +0100 |
|---|---|---|
| committer | Takashi Iwai | 2019-01-22 17:20:56 +0100 |
| commit | f0f9f497d44e2f696b4e16c41f3eaa13a009f22d (patch) | |
| tree | cb0735e2b528e68451eeefb9b6bb751a09b99a1e /sound/firewire/fireface/ff-midi.c | |
| parent | ALSA: fireface: add protocol-specific operation to fill transaction buffer wi... (diff) | |
| download | kernel-qcow2-linux-f0f9f497d44e2f696b4e16c41f3eaa13a009f22d.tar.gz kernel-qcow2-linux-f0f9f497d44e2f696b4e16c41f3eaa13a009f22d.tar.xz kernel-qcow2-linux-f0f9f497d44e2f696b4e16c41f3eaa13a009f22d.zip | |
ALSA: fireface: support rx MIDI functionality for Fireface UCX
In latter model of Fireface series, asynchronous transaction includes
a prefix byte to indicate the way to decode included MIDI bytes.
Upper 4 bits of the prefix byte indicates port number, and the rest 4
bits indicate the way to decode rest of bytes for MIDI messages.
Basically the rest bits indicates the number of bytes for MIDI message.
However, if the last byte of each MIDi message is included, the rest
bits are 0xf. For example:
message: f0 00 00 66 14 20 00 00 f7
offset: content (big endian, port 0)
'0030: 0x02f00000
'0030: 0x03006614
'0030: 0x03200000
'0030: 0x0ff70000
This commit supports encoding scheme for the above and allows
applications to transfer MIDI messages via ALSA rawmidi interface.
An unused member (running_status) is reused to keep state of
transmission of system exclusive messages.
For your information, this is a dump of config rom.
$ sudo ./hinawa-config-rom-printer /dev/fw1
{ 'bus-info': { 'bmc': False,
'chip_ID': 13225063715,
'cmc': False,
'cyc_clk_acc': 0,
'imc': False,
'isc': True,
'max_rec': 512,
'name': '1394',
'node_vendor_ID': 2613},
'root-directory': [ [ 'NODE_CAPABILITIES',
{ 'addressing': {'64': True, 'fix': True, 'prv': False},
'misc': {'int': False, 'ms': False, 'spt': True},
'state': { 'atn': False,
'ded': False,
'drq': True,
'elo': False,
'init': False,
'lst': True,
'off': False},
'testing': {'bas': False, 'ext': False}}],
['VENDOR', 2613],
['DESCRIPTOR', 'RME!'],
['EUI_64', 2873037108442403],
[ 'UNIT',
[ ['SPECIFIER_ID', 2613],
['VERSION', 4],
['MODEL', 1054720],
['DESCRIPTOR', 'Fireface UCX']]]]}
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fireface/ff-midi.c')
| -rw-r--r-- | sound/firewire/fireface/ff-midi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sound/firewire/fireface/ff-midi.c b/sound/firewire/fireface/ff-midi.c index 6a49611ee462..5b44e1c4569a 100644 --- a/sound/firewire/fireface/ff-midi.c +++ b/sound/firewire/fireface/ff-midi.c @@ -19,7 +19,7 @@ static int midi_playback_open(struct snd_rawmidi_substream *substream) struct snd_ff *ff = substream->rmidi->private_data; /* Initialize internal status. */ - ff->running_status[substream->number] = 0; + ff->on_sysex[substream->number] = 0; ff->rx_midi_error[substream->number] = false; WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream); |