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Diffstat (limited to '')
| -rw-r--r-- | sound/firewire/motu/motu-midi.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/sound/firewire/motu/motu-midi.c b/sound/firewire/motu/motu-midi.c new file mode 100644 index 000000000..e55cab6d7 --- /dev/null +++ b/sound/firewire/motu/motu-midi.c @@ -0,0 +1,169 @@ +/* + * motu-midi.h - a part of driver for MOTU FireWire series + * + * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp> + * + * Licensed under the terms of the GNU General Public License, version 2. + */ +#include "motu.h" + +static int midi_capture_open(struct snd_rawmidi_substream *substream) +{ + struct snd_motu *motu = substream->rmidi->private_data; + int err; + + err = snd_motu_stream_lock_try(motu); + if (err < 0) + return err; + + mutex_lock(&motu->mutex); + + motu->capture_substreams++; + err = snd_motu_stream_start_duplex(motu, 0); + + mutex_unlock(&motu->mutex); + + if (err < 0) + snd_motu_stream_lock_release(motu); + + return err; +} + +static int midi_playback_open(struct snd_rawmidi_substream *substream) +{ + struct snd_motu *motu = substream->rmidi->private_data; + int err; + + err = snd_motu_stream_lock_try(motu); + if (err < 0) + return err; + + mutex_lock(&motu->mutex); + + motu->playback_substreams++; + err = snd_motu_stream_start_duplex(motu, 0); + + mutex_unlock(&motu->mutex); + + if (err < 0) + snd_motu_stream_lock_release(motu); + + return err; +} + +static int midi_capture_close(struct snd_rawmidi_substream *substream) +{ + struct snd_motu *motu = substream->rmidi->private_data; + + mutex_lock(&motu->mutex); + + motu->capture_substreams--; + snd_motu_stream_stop_duplex(motu); + + mutex_unlock(&motu->mutex); + + snd_motu_stream_lock_release(motu); + return 0; +} + +static int midi_playback_close(struct snd_rawmidi_substream *substream) +{ + struct snd_motu *motu = substream->rmidi->private_data; + + mutex_lock(&motu->mutex); + + motu->playback_substreams--; + snd_motu_stream_stop_duplex(motu); + + mutex_unlock(&motu->mutex); + + snd_motu_stream_lock_release(motu); + return 0; +} + +static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) +{ + struct snd_motu *motu = substrm->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&motu->lock, flags); + + if (up) + amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number, + substrm); + else + amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number, + NULL); + + spin_unlock_irqrestore(&motu->lock, flags); +} + +static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) +{ + struct snd_motu *motu = substrm->rmidi->private_data; + unsigned long flags; + + spin_lock_irqsave(&motu->lock, flags); + + if (up) + amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number, + substrm); + else + amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number, + NULL); + + spin_unlock_irqrestore(&motu->lock, flags); +} + +static void set_midi_substream_names(struct snd_motu *motu, + struct snd_rawmidi_str *str) +{ + struct snd_rawmidi_substream *subs; + + list_for_each_entry(subs, &str->substreams, list) { + snprintf(subs->name, sizeof(subs->name), + "%s MIDI %d", motu->card->shortname, subs->number + 1); + } +} + +int snd_motu_create_midi_devices(struct snd_motu *motu) +{ + static const struct snd_rawmidi_ops capture_ops = { + .open = midi_capture_open, + .close = midi_capture_close, + .trigger = midi_capture_trigger, + }; + static const struct snd_rawmidi_ops playback_ops = { + .open = midi_playback_open, + .close = midi_playback_close, + .trigger = midi_playback_trigger, + }; + struct snd_rawmidi *rmidi; + struct snd_rawmidi_str *str; + int err; + + /* create midi ports */ + err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi); + if (err < 0) + return err; + + snprintf(rmidi->name, sizeof(rmidi->name), + "%s MIDI", motu->card->shortname); + rmidi->private_data = motu; + + rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT | + SNDRV_RAWMIDI_INFO_OUTPUT | + SNDRV_RAWMIDI_INFO_DUPLEX; + + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, + &capture_ops); + str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; + set_midi_substream_names(motu, str); + + snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, + &playback_ops); + str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; + set_midi_substream_names(motu, str); + + return 0; +} |