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 scoped_guard(mutex, &motu->mutex) { 19 err = snd_motu_stream_reserve_duplex(motu, 0, 0, 0); 20 if (err >= 0) { 21 ++motu->substreams_counter; 22 err = snd_motu_stream_start_duplex(motu); 23 if (err < 0) 24 --motu->substreams_counter; 25 } 26 } 27 28 if (err < 0) 29 snd_motu_stream_lock_release(motu); 30 31 return err; 32 } 33 34 static int midi_close(struct snd_rawmidi_substream *substream) 35 { 36 struct snd_motu *motu = substream->rmidi->private_data; 37 38 scoped_guard(mutex, &motu->mutex) { 39 --motu->substreams_counter; 40 snd_motu_stream_stop_duplex(motu); 41 } 42 43 snd_motu_stream_lock_release(motu); 44 return 0; 45 } 46 47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) 48 { 49 struct snd_motu *motu = substrm->rmidi->private_data; 50 51 guard(spinlock_irqsave)(&motu->lock); 52 53 if (up) 54 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number, 55 substrm); 56 else 57 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number, 58 NULL); 59 } 60 61 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) 62 { 63 struct snd_motu *motu = substrm->rmidi->private_data; 64 65 guard(spinlock_irqsave)(&motu->lock); 66 67 if (up) 68 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number, 69 substrm); 70 else 71 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number, 72 NULL); 73 } 74 75 static void set_midi_substream_names(struct snd_motu *motu, 76 struct snd_rawmidi_str *str) 77 { 78 struct snd_rawmidi_substream *subs; 79 80 list_for_each_entry(subs, &str->substreams, list) { 81 scnprintf(subs->name, sizeof(subs->name), 82 "%s MIDI %d", motu->card->shortname, subs->number + 1); 83 } 84 } 85 86 int snd_motu_create_midi_devices(struct snd_motu *motu) 87 { 88 static const struct snd_rawmidi_ops capture_ops = { 89 .open = midi_open, 90 .close = midi_close, 91 .trigger = midi_capture_trigger, 92 }; 93 static const struct snd_rawmidi_ops playback_ops = { 94 .open = midi_open, 95 .close = midi_close, 96 .trigger = midi_playback_trigger, 97 }; 98 struct snd_rawmidi *rmidi; 99 struct snd_rawmidi_str *str; 100 int err; 101 102 /* create midi ports */ 103 err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi); 104 if (err < 0) 105 return err; 106 107 snprintf(rmidi->name, sizeof(rmidi->name), 108 "%s MIDI", motu->card->shortname); 109 rmidi->private_data = motu; 110 111 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT | 112 SNDRV_RAWMIDI_INFO_OUTPUT | 113 SNDRV_RAWMIDI_INFO_DUPLEX; 114 115 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 116 &capture_ops); 117 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 118 set_midi_substream_names(motu, str); 119 120 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 121 &playback_ops); 122 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 123 set_midi_substream_names(motu, str); 124 125 return 0; 126 } 127