diff options
| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2018-12-11 13:17:34 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2018-12-11 16:57:38 +0300 |
| commit | aef4ad2f5aa27ec05f0306547bcf7cf86a9e9873 (patch) | |
| tree | b05dce2d6f44e7c144ca8d959091e0bd6e629250 /sound/firewire/fireface/ff-protocol-ff400.c | |
| parent | 3eb8a24459491acc40440b655ca640c87125c5a3 (diff) | |
| download | linux-aef4ad2f5aa27ec05f0306547bcf7cf86a9e9873.tar.xz | |
ALSA: fireface: localize a handler for MIDI messages on tx transaction
Content of asynchronous transaction for MIDI messages differs between
Fireface 400 and 800.
This commit adds a model-specific handler for the transaction and adds
arrangement.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/fireface/ff-protocol-ff400.c')
| -rw-r--r-- | sound/firewire/fireface/ff-protocol-ff400.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sound/firewire/fireface/ff-protocol-ff400.c b/sound/firewire/fireface/ff-protocol-ff400.c index b283762e785c..8f34174ee813 100644 --- a/sound/firewire/fireface/ff-protocol-ff400.c +++ b/sound/firewire/fireface/ff-protocol-ff400.c @@ -105,7 +105,45 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable) return err; } +static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length) +{ + int i; + + for (i = 0; i < length / 4; i++) { + u32 quad = le32_to_cpu(buf[i]); + u8 byte; + unsigned int index; + struct snd_rawmidi_substream *substream; + + /* Message in first port. */ + /* + * This value may represent the index of this unit when the same + * units are on the same IEEE 1394 bus. This driver doesn't use + * it. + */ + index = (quad >> 8) & 0xff; + if (index > 0) { + substream = READ_ONCE(ff->tx_midi_substreams[0]); + if (substream != NULL) { + byte = quad & 0xff; + snd_rawmidi_receive(substream, &byte, 1); + } + } + + /* Message in second port. */ + index = (quad >> 24) & 0xff; + if (index > 0) { + substream = READ_ONCE(ff->tx_midi_substreams[1]); + if (substream != NULL) { + byte = (quad >> 16) & 0xff; + snd_rawmidi_receive(substream, &byte, 1); + } + } + } +} + const struct snd_ff_protocol snd_ff_protocol_ff400 = { + .handle_midi_msg = ff400_handle_midi_msg, .begin_session = ff400_begin_session, .finish_session = ff400_finish_session, .switch_fetching_mode = ff400_switch_fetching_mode, |