// SPDX-License-Identifier: GPL-2.0-only /* * motu-midi.h - a part of driver for MOTU FireWire series * * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp> */ #include "motu.h" static int midi_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); err = snd_motu_stream_reserve_duplex(motu, 0); if (err >= 0) { ++motu->substreams_counter; err = snd_motu_stream_start_duplex(motu); if (err < 0) --motu->substreams_counter; } mutex_unlock(&motu->mutex); if (err < 0) snd_motu_stream_lock_release(motu); return err; } static int midi_close(struct snd_rawmidi_substream *substream) { struct snd_motu *motu = substream->rmidi->private_data; mutex_lock(&motu->mutex); --motu->substreams_counter; 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_open, .close = midi_close, .trigger = midi_capture_trigger, }; static const struct snd_rawmidi_ops playback_ops = { .open = midi_open, .close = midi_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; }