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 void set_midi_substream_names(struct snd_oxfw *oxfw, 120 struct snd_rawmidi_str *str) 121 { 122 struct snd_rawmidi_substream *subs; 123 124 list_for_each_entry(subs, &str->substreams, list) { 125 snprintf(subs->name, sizeof(subs->name), 126 "%s MIDI %d", 127 oxfw->card->shortname, subs->number + 1); 128 } 129 } 130 131 int snd_oxfw_create_midi(struct snd_oxfw *oxfw) 132 { 133 static const struct snd_rawmidi_ops capture_ops = { 134 .open = midi_capture_open, 135 .close = midi_capture_close, 136 .trigger = midi_capture_trigger, 137 }; 138 static const struct snd_rawmidi_ops playback_ops = { 139 .open = midi_playback_open, 140 .close = midi_playback_close, 141 .trigger = midi_playback_trigger, 142 }; 143 struct snd_rawmidi *rmidi; 144 struct snd_rawmidi_str *str; 145 int err; 146 147 if (oxfw->midi_input_ports == 0 && oxfw->midi_output_ports == 0) 148 return 0; 149 150 /* create midi ports */ 151 err = snd_rawmidi_new(oxfw->card, oxfw->card->driver, 0, 152 oxfw->midi_output_ports, oxfw->midi_input_ports, 153 &rmidi); 154 if (err < 0) 155 return err; 156 157 snprintf(rmidi->name, sizeof(rmidi->name), 158 "%s MIDI", oxfw->card->shortname); 159 rmidi->private_data = oxfw; 160 161 if (oxfw->midi_input_ports > 0) { 162 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 163 164 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 165 &capture_ops); 166 167 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 168 169 set_midi_substream_names(oxfw, str); 170 } 171 172 if (oxfw->midi_output_ports > 0) { 173 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 174 175 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 176 &playback_ops); 177 178 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 179 180 set_midi_substream_names(oxfw, str); 181 } 182 183 if ((oxfw->midi_output_ports > 0) && (oxfw->midi_input_ports > 0)) 184 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 185 186 return 0; 187 } 188