1 /* 2 * tascam-midi.c - a part of driver for TASCAM FireWire series 3 * 4 * Copyright (c) 2015 Takashi Sakamoto 5 * 6 * Licensed under the terms of the GNU General Public License, version 2. 7 */ 8 9 #include "tascam.h" 10 11 static int midi_capture_open(struct snd_rawmidi_substream *substream) 12 { 13 /* Do nothing. */ 14 return 0; 15 } 16 17 static int midi_playback_open(struct snd_rawmidi_substream *substream) 18 { 19 struct snd_tscm *tscm = substream->rmidi->private_data; 20 21 snd_fw_async_midi_port_init(&tscm->out_ports[substream->number]); 22 23 return 0; 24 } 25 26 static int midi_capture_close(struct snd_rawmidi_substream *substream) 27 { 28 /* Do nothing. */ 29 return 0; 30 } 31 32 static int midi_playback_close(struct snd_rawmidi_substream *substream) 33 { 34 return 0; 35 } 36 37 static void midi_playback_drain(struct snd_rawmidi_substream *substream) 38 { 39 struct snd_tscm *tscm = substream->rmidi->private_data; 40 41 snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]); 42 } 43 44 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) 45 { 46 struct snd_tscm *tscm = substrm->rmidi->private_data; 47 unsigned long flags; 48 49 spin_lock_irqsave(&tscm->lock, flags); 50 51 if (up) 52 tscm->tx_midi_substreams[substrm->number] = substrm; 53 else 54 tscm->tx_midi_substreams[substrm->number] = NULL; 55 56 spin_unlock_irqrestore(&tscm->lock, flags); 57 } 58 59 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) 60 { 61 struct snd_tscm *tscm = substrm->rmidi->private_data; 62 unsigned long flags; 63 64 spin_lock_irqsave(&tscm->lock, flags); 65 66 if (up) 67 snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number], 68 substrm); 69 70 spin_unlock_irqrestore(&tscm->lock, flags); 71 } 72 73 int snd_tscm_create_midi_devices(struct snd_tscm *tscm) 74 { 75 static const struct snd_rawmidi_ops capture_ops = { 76 .open = midi_capture_open, 77 .close = midi_capture_close, 78 .trigger = midi_capture_trigger, 79 }; 80 static const struct snd_rawmidi_ops playback_ops = { 81 .open = midi_playback_open, 82 .close = midi_playback_close, 83 .drain = midi_playback_drain, 84 .trigger = midi_playback_trigger, 85 }; 86 struct snd_rawmidi *rmidi; 87 struct snd_rawmidi_str *stream; 88 struct snd_rawmidi_substream *subs; 89 int err; 90 91 err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0, 92 tscm->spec->midi_playback_ports, 93 tscm->spec->midi_capture_ports, 94 &rmidi); 95 if (err < 0) 96 return err; 97 98 snprintf(rmidi->name, sizeof(rmidi->name), 99 "%s MIDI", tscm->card->shortname); 100 rmidi->private_data = tscm; 101 102 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 103 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 104 &capture_ops); 105 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 106 107 /* Set port names for MIDI input. */ 108 list_for_each_entry(subs, &stream->substreams, list) { 109 /* TODO: support virtual MIDI ports. */ 110 if (subs->number < tscm->spec->midi_capture_ports) { 111 /* Hardware MIDI ports. */ 112 snprintf(subs->name, sizeof(subs->name), 113 "%s MIDI %d", 114 tscm->card->shortname, subs->number + 1); 115 } 116 } 117 118 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 119 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 120 &playback_ops); 121 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 122 123 /* Set port names for MIDI ourput. */ 124 list_for_each_entry(subs, &stream->substreams, list) { 125 if (subs->number < tscm->spec->midi_playback_ports) { 126 /* Hardware MIDI ports only. */ 127 snprintf(subs->name, sizeof(subs->name), 128 "%s MIDI %d", 129 tscm->card->shortname, subs->number + 1); 130 } 131 } 132 133 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 134 135 return 0; 136 } 137