1 /* 2 * oxfw_midi.c - a part of driver for OXFW970/971 based devices 3 * 4 * Copyright (c) 2014 Takashi Sakamoto 5 * 6 * Licensed under the terms of the GNU General Public License, version 2. 7 */ 8 9 #include "oxfw.h" 10 11 static int midi_capture_open(struct snd_rawmidi_substream *substream) 12 { 13 struct snd_oxfw *oxfw = substream->rmidi->private_data; 14 int err; 15 16 err = snd_oxfw_stream_lock_try(oxfw); 17 if (err < 0) 18 return err; 19 20 mutex_lock(&oxfw->mutex); 21 22 oxfw->capture_substreams++; 23 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->tx_stream, 0, 0); 24 25 mutex_unlock(&oxfw->mutex); 26 27 if (err < 0) 28 snd_oxfw_stream_lock_release(oxfw); 29 30 return err; 31 } 32 33 static int midi_playback_open(struct snd_rawmidi_substream *substream) 34 { 35 struct snd_oxfw *oxfw = substream->rmidi->private_data; 36 int err; 37 38 err = snd_oxfw_stream_lock_try(oxfw); 39 if (err < 0) 40 return err; 41 42 mutex_lock(&oxfw->mutex); 43 44 oxfw->playback_substreams++; 45 err = snd_oxfw_stream_start_simplex(oxfw, &oxfw->rx_stream, 0, 0); 46 47 mutex_unlock(&oxfw->mutex); 48 49 if (err < 0) 50 snd_oxfw_stream_lock_release(oxfw); 51 52 return err; 53 } 54 55 static int midi_capture_close(struct snd_rawmidi_substream *substream) 56 { 57 struct snd_oxfw *oxfw = substream->rmidi->private_data; 58 59 mutex_lock(&oxfw->mutex); 60 61 oxfw->capture_substreams--; 62 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->tx_stream); 63 64 mutex_unlock(&oxfw->mutex); 65 66 snd_oxfw_stream_lock_release(oxfw); 67 return 0; 68 } 69 70 static int midi_playback_close(struct snd_rawmidi_substream *substream) 71 { 72 struct snd_oxfw *oxfw = substream->rmidi->private_data; 73 74 mutex_lock(&oxfw->mutex); 75 76 oxfw->playback_substreams--; 77 snd_oxfw_stream_stop_simplex(oxfw, &oxfw->rx_stream); 78 79 mutex_unlock(&oxfw->mutex); 80 81 snd_oxfw_stream_lock_release(oxfw); 82 return 0; 83 } 84 85 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up) 86 { 87 struct snd_oxfw *oxfw = substrm->rmidi->private_data; 88 unsigned long flags; 89 90 spin_lock_irqsave(&oxfw->lock, flags); 91 92 if (up) 93 amdtp_am824_midi_trigger(&oxfw->tx_stream, 94 substrm->number, substrm); 95 else 96 amdtp_am824_midi_trigger(&oxfw->tx_stream, 97 substrm->number, NULL); 98 99 spin_unlock_irqrestore(&oxfw->lock, flags); 100 } 101 102 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up) 103 { 104 struct snd_oxfw *oxfw = substrm->rmidi->private_data; 105 unsigned long flags; 106 107 spin_lock_irqsave(&oxfw->lock, flags); 108 109 if (up) 110 amdtp_am824_midi_trigger(&oxfw->rx_stream, 111 substrm->number, substrm); 112 else 113 amdtp_am824_midi_trigger(&oxfw->rx_stream, 114 substrm->number, NULL); 115 116 spin_unlock_irqrestore(&oxfw->lock, flags); 117 } 118 119 static struct snd_rawmidi_ops midi_capture_ops = { 120 .open = midi_capture_open, 121 .close = midi_capture_close, 122 .trigger = midi_capture_trigger, 123 }; 124 125 static struct snd_rawmidi_ops midi_playback_ops = { 126 .open = midi_playback_open, 127 .close = midi_playback_close, 128 .trigger = midi_playback_trigger, 129 }; 130 131 static void set_midi_substream_names(struct snd_oxfw *oxfw, 132 struct snd_rawmidi_str *str) 133 { 134 struct snd_rawmidi_substream *subs; 135 136 list_for_each_entry(subs, &str->substreams, list) { 137 snprintf(subs->name, sizeof(subs->name), 138 "%s MIDI %d", 139 oxfw->card->shortname, subs->number + 1); 140 } 141 } 142 143 int snd_oxfw_create_midi(struct snd_oxfw *oxfw) 144 { 145 struct snd_rawmidi *rmidi; 146 struct snd_rawmidi_str *str; 147 int err; 148 149 if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0) 150 return 0; 151 152 /* create midi ports */ 153 err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0, 154 oxfw->midi_output_ports, oxfw->midi_input_ports, 155 &rmidi); 156 if (err < 0) 157 return err; 158 159 snprintf(rmidi->name, sizeof(rmidi->name), 160 "%s MIDI", oxfw->card->shortname); 161 rmidi->private_data = oxfw; 162 163 if (oxfw->midi_input_ports > 0) { 164 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 165 166 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 167 &midi_capture_ops); 168 169 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 170 171 set_midi_substream_names(oxfw, str); 172 } 173 174 if (oxfw->midi_output_ports > 0) { 175 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 176 177 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 178 &midi_playback_ops); 179 180 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 181 182 set_midi_substream_names(oxfw, str); 183 } 184 185 if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0)) 186 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 187 188 return 0; 189 } 190