1 /* 2 * bebob_midi.c - a part of driver for BeBoB based devices 3 * 4 * Copyright (c) 2013-2014 Takashi Sakamoto 5 * 6 * Licensed under the terms of the GNU General Public License, version 2. 7 */ 8 9 #include "bebob.h" 10 11 static int midi_capture_open(struct snd_rawmidi_substream *substream) 12 { 13 struct snd_bebob *bebob = substream->rmidi->private_data; 14 15 atomic_inc(&bebob->capture_substreams); 16 return snd_bebob_stream_start_duplex(bebob, 0); 17 } 18 19 static int midi_playback_open(struct snd_rawmidi_substream *substream) 20 { 21 struct snd_bebob *bebob = substream->rmidi->private_data; 22 23 atomic_inc(&bebob->playback_substreams); 24 return snd_bebob_stream_start_duplex(bebob, 0); 25 } 26 27 static int midi_capture_close(struct snd_rawmidi_substream *substream) 28 { 29 struct snd_bebob *bebob = substream->rmidi->private_data; 30 31 atomic_dec(&bebob->capture_substreams); 32 snd_bebob_stream_stop_duplex(bebob); 33 34 return 0; 35 } 36 37 static int midi_playback_close(struct snd_rawmidi_substream *substream) 38 { 39 struct snd_bebob *bebob = substream->rmidi->private_data; 40 41 atomic_dec(&bebob->playback_substreams); 42 snd_bebob_stream_stop_duplex(bebob); 43 44 return 0; 45 } 46 47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) 48 { 49 struct snd_bebob *bebob = substrm->rmidi->private_data; 50 unsigned long flags; 51 52 spin_lock_irqsave(&bebob->lock, flags); 53 54 if (up) 55 amdtp_stream_midi_trigger(&bebob->tx_stream, 56 substrm->number, substrm); 57 else 58 amdtp_stream_midi_trigger(&bebob->tx_stream, 59 substrm->number, NULL); 60 61 spin_unlock_irqrestore(&bebob->lock, flags); 62 } 63 64 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) 65 { 66 struct snd_bebob *bebob = substrm->rmidi->private_data; 67 unsigned long flags; 68 69 spin_lock_irqsave(&bebob->lock, flags); 70 71 if (up) 72 amdtp_stream_midi_trigger(&bebob->rx_stream, 73 substrm->number, substrm); 74 else 75 amdtp_stream_midi_trigger(&bebob->rx_stream, 76 substrm->number, NULL); 77 78 spin_unlock_irqrestore(&bebob->lock, flags); 79 } 80 81 static struct snd_rawmidi_ops midi_capture_ops = { 82 .open = midi_capture_open, 83 .close = midi_capture_close, 84 .trigger = midi_capture_trigger, 85 }; 86 87 static struct snd_rawmidi_ops midi_playback_ops = { 88 .open = midi_playback_open, 89 .close = midi_playback_close, 90 .trigger = midi_playback_trigger, 91 }; 92 93 static void set_midi_substream_names(struct snd_bebob *bebob, 94 struct snd_rawmidi_str *str) 95 { 96 struct snd_rawmidi_substream *subs; 97 98 list_for_each_entry(subs, &str->substreams, list) { 99 snprintf(subs->name, sizeof(subs->name), 100 "%s MIDI %d", 101 bebob->card->shortname, subs->number + 1); 102 } 103 } 104 105 int snd_bebob_create_midi_devices(struct snd_bebob *bebob) 106 { 107 struct snd_rawmidi *rmidi; 108 struct snd_rawmidi_str *str; 109 int err; 110 111 /* create midi ports */ 112 err = snd_rawmidi_new(bebob->card, bebob->card->driver, 0, 113 bebob->midi_output_ports, bebob->midi_input_ports, 114 &rmidi); 115 if (err < 0) 116 return err; 117 118 snprintf(rmidi->name, sizeof(rmidi->name), 119 "%s MIDI", bebob->card->shortname); 120 rmidi->private_data = bebob; 121 122 if (bebob->midi_input_ports > 0) { 123 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 124 125 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 126 &midi_capture_ops); 127 128 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 129 130 set_midi_substream_names(bebob, str); 131 } 132 133 if (bebob->midi_output_ports > 0) { 134 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 135 136 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 137 &midi_playback_ops); 138 139 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 140 141 set_midi_substream_names(bebob, str); 142 } 143 144 if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0)) 145 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 146 147 return 0; 148 } 149