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 int err; 15 16 err = snd_bebob_stream_lock_try(bebob); 17 if (err < 0) 18 goto end; 19 20 mutex_lock(&bebob->mutex); 21 bebob->substreams_counter++; 22 err = snd_bebob_stream_start_duplex(bebob, 0); 23 mutex_unlock(&bebob->mutex); 24 if (err < 0) 25 snd_bebob_stream_lock_release(bebob); 26 end: 27 return err; 28 } 29 30 static int midi_playback_open(struct snd_rawmidi_substream *substream) 31 { 32 struct snd_bebob *bebob = substream->rmidi->private_data; 33 int err; 34 35 err = snd_bebob_stream_lock_try(bebob); 36 if (err < 0) 37 goto end; 38 39 mutex_lock(&bebob->mutex); 40 bebob->substreams_counter++; 41 err = snd_bebob_stream_start_duplex(bebob, 0); 42 mutex_unlock(&bebob->mutex); 43 if (err < 0) 44 snd_bebob_stream_lock_release(bebob); 45 end: 46 return err; 47 } 48 49 static int midi_capture_close(struct snd_rawmidi_substream *substream) 50 { 51 struct snd_bebob *bebob = substream->rmidi->private_data; 52 53 mutex_lock(&bebob->mutex); 54 bebob->substreams_counter--; 55 snd_bebob_stream_stop_duplex(bebob); 56 mutex_unlock(&bebob->mutex); 57 58 snd_bebob_stream_lock_release(bebob); 59 return 0; 60 } 61 62 static int midi_playback_close(struct snd_rawmidi_substream *substream) 63 { 64 struct snd_bebob *bebob = substream->rmidi->private_data; 65 66 mutex_lock(&bebob->mutex); 67 bebob->substreams_counter--; 68 snd_bebob_stream_stop_duplex(bebob); 69 mutex_unlock(&bebob->mutex); 70 71 snd_bebob_stream_lock_release(bebob); 72 return 0; 73 } 74 75 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) 76 { 77 struct snd_bebob *bebob = substrm->rmidi->private_data; 78 unsigned long flags; 79 80 spin_lock_irqsave(&bebob->lock, flags); 81 82 if (up) 83 amdtp_am824_midi_trigger(&bebob->tx_stream, 84 substrm->number, substrm); 85 else 86 amdtp_am824_midi_trigger(&bebob->tx_stream, 87 substrm->number, NULL); 88 89 spin_unlock_irqrestore(&bebob->lock, flags); 90 } 91 92 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) 93 { 94 struct snd_bebob *bebob = substrm->rmidi->private_data; 95 unsigned long flags; 96 97 spin_lock_irqsave(&bebob->lock, flags); 98 99 if (up) 100 amdtp_am824_midi_trigger(&bebob->rx_stream, 101 substrm->number, substrm); 102 else 103 amdtp_am824_midi_trigger(&bebob->rx_stream, 104 substrm->number, NULL); 105 106 spin_unlock_irqrestore(&bebob->lock, flags); 107 } 108 109 static struct snd_rawmidi_ops midi_capture_ops = { 110 .open = midi_capture_open, 111 .close = midi_capture_close, 112 .trigger = midi_capture_trigger, 113 }; 114 115 static struct snd_rawmidi_ops midi_playback_ops = { 116 .open = midi_playback_open, 117 .close = midi_playback_close, 118 .trigger = midi_playback_trigger, 119 }; 120 121 static void set_midi_substream_names(struct snd_bebob *bebob, 122 struct snd_rawmidi_str *str) 123 { 124 struct snd_rawmidi_substream *subs; 125 126 list_for_each_entry(subs, &str->substreams, list) { 127 snprintf(subs->name, sizeof(subs->name), 128 "%s MIDI %d", 129 bebob->card->shortname, subs->number + 1); 130 } 131 } 132 133 int snd_bebob_create_midi_devices(struct snd_bebob *bebob) 134 { 135 struct snd_rawmidi *rmidi; 136 struct snd_rawmidi_str *str; 137 int err; 138 139 /* create midi ports */ 140 err = snd_rawmidi_new(bebob->card, bebob->card->driver, 0, 141 bebob->midi_output_ports, bebob->midi_input_ports, 142 &rmidi); 143 if (err < 0) 144 return err; 145 146 snprintf(rmidi->name, sizeof(rmidi->name), 147 "%s MIDI", bebob->card->shortname); 148 rmidi->private_data = bebob; 149 150 if (bebob->midi_input_ports > 0) { 151 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 152 153 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 154 &midi_capture_ops); 155 156 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 157 158 set_midi_substream_names(bebob, str); 159 } 160 161 if (bebob->midi_output_ports > 0) { 162 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 163 164 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 165 &midi_playback_ops); 166 167 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 168 169 set_midi_substream_names(bebob, str); 170 } 171 172 if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0)) 173 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 174 175 return 0; 176 } 177