1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * motu-midi.h - a part of driver for MOTU FireWire series 4 * 5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp> 6 */ 7 #include "motu.h" 8 9 static 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 36 static 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 51 static 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 else 62 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number, 63 NULL); 64 65 spin_unlock_irqrestore(&motu->lock, flags); 66 } 67 68 static 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 else 79 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number, 80 NULL); 81 82 spin_unlock_irqrestore(&motu->lock, flags); 83 } 84 85 static 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 snprintf(subs->name, sizeof(subs->name), 92 "%s MIDI %d", motu->card->shortname, subs->number + 1); 93 } 94 } 95 96 int 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