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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * motu-midi.h - a part of driver for MOTU FireWire series4 *5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>6 */7#include "motu.h"8 9static int midi_open(struct snd_rawmidi_substream *substream)10{11 struct snd_motu *motu = substream->rmidi->private_data;12 int err;13 14 err = snd_motu_stream_lock_try(motu);15 if (err < 0)16 return err;17 18 mutex_lock(&motu->mutex);19 20 err = snd_motu_stream_reserve_duplex(motu, 0, 0, 0);21 if (err >= 0) {22 ++motu->substreams_counter;23 err = snd_motu_stream_start_duplex(motu);24 if (err < 0)25 --motu->substreams_counter;26 }27 28 mutex_unlock(&motu->mutex);29 30 if (err < 0)31 snd_motu_stream_lock_release(motu);32 33 return err;34}35 36static int midi_close(struct snd_rawmidi_substream *substream)37{38 struct snd_motu *motu = substream->rmidi->private_data;39 40 mutex_lock(&motu->mutex);41 42 --motu->substreams_counter;43 snd_motu_stream_stop_duplex(motu);44 45 mutex_unlock(&motu->mutex);46 47 snd_motu_stream_lock_release(motu);48 return 0;49}50 51static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)52{53 struct snd_motu *motu = substrm->rmidi->private_data;54 unsigned long flags;55 56 spin_lock_irqsave(&motu->lock, flags);57 58 if (up)59 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,60 substrm);61 else62 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,63 NULL);64 65 spin_unlock_irqrestore(&motu->lock, flags);66}67 68static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)69{70 struct snd_motu *motu = substrm->rmidi->private_data;71 unsigned long flags;72 73 spin_lock_irqsave(&motu->lock, flags);74 75 if (up)76 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,77 substrm);78 else79 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,80 NULL);81 82 spin_unlock_irqrestore(&motu->lock, flags);83}84 85static void set_midi_substream_names(struct snd_motu *motu,86 struct snd_rawmidi_str *str)87{88 struct snd_rawmidi_substream *subs;89 90 list_for_each_entry(subs, &str->substreams, list) {91 scnprintf(subs->name, sizeof(subs->name),92 "%s MIDI %d", motu->card->shortname, subs->number + 1);93 }94}95 96int snd_motu_create_midi_devices(struct snd_motu *motu)97{98 static const struct snd_rawmidi_ops capture_ops = {99 .open = midi_open,100 .close = midi_close,101 .trigger = midi_capture_trigger,102 };103 static const struct snd_rawmidi_ops playback_ops = {104 .open = midi_open,105 .close = midi_close,106 .trigger = midi_playback_trigger,107 };108 struct snd_rawmidi *rmidi;109 struct snd_rawmidi_str *str;110 int err;111 112 /* create midi ports */113 err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi);114 if (err < 0)115 return err;116 117 snprintf(rmidi->name, sizeof(rmidi->name),118 "%s MIDI", motu->card->shortname);119 rmidi->private_data = motu;120 121 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |122 SNDRV_RAWMIDI_INFO_OUTPUT |123 SNDRV_RAWMIDI_INFO_DUPLEX;124 125 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,126 &capture_ops);127 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];128 set_midi_substream_names(motu, str);129 130 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,131 &playback_ops);132 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];133 set_midi_substream_names(motu, str);134 135 return 0;136}137