1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ff-midi.c - a part of driver for RME Fireface series 4 * 5 * Copyright (c) 2015-2017 Takashi Sakamoto 6 */ 7 8 #include "ff.h" 9 10 static int midi_capture_open(struct snd_rawmidi_substream *substream) 11 { 12 /* Do nothing. */ 13 return 0; 14 } 15 16 static int midi_playback_open(struct snd_rawmidi_substream *substream) 17 { 18 struct snd_ff *ff = substream->rmidi->private_data; 19 20 /* Initialize internal status. */ 21 ff->on_sysex[substream->number] = 0; 22 ff->rx_midi_error[substream->number] = false; 23 24 WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream); 25 26 return 0; 27 } 28 29 static int midi_capture_close(struct snd_rawmidi_substream *substream) 30 { 31 /* Do nothing. */ 32 return 0; 33 } 34 35 static int midi_playback_close(struct snd_rawmidi_substream *substream) 36 { 37 struct snd_ff *ff = substream->rmidi->private_data; 38 39 cancel_work_sync(&ff->rx_midi_work[substream->number]); 40 WRITE_ONCE(ff->rx_midi_substreams[substream->number], NULL); 41 42 return 0; 43 } 44 45 static void midi_capture_trigger(struct snd_rawmidi_substream *substream, 46 int up) 47 { 48 struct snd_ff *ff = substream->rmidi->private_data; 49 unsigned long flags; 50 51 spin_lock_irqsave(&ff->lock, flags); 52 53 if (up) 54 WRITE_ONCE(ff->tx_midi_substreams[substream->number], 55 substream); 56 else 57 WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL); 58 59 spin_unlock_irqrestore(&ff->lock, flags); 60 } 61 62 static void midi_playback_trigger(struct snd_rawmidi_substream *substream, 63 int up) 64 { 65 struct snd_ff *ff = substream->rmidi->private_data; 66 unsigned long flags; 67 68 spin_lock_irqsave(&ff->lock, flags); 69 70 if (up || !ff->rx_midi_error[substream->number]) 71 schedule_work(&ff->rx_midi_work[substream->number]); 72 73 spin_unlock_irqrestore(&ff->lock, flags); 74 } 75 76 static void set_midi_substream_names(struct snd_rawmidi_str *stream, 77 const char *const name) 78 { 79 struct snd_rawmidi_substream *substream; 80 81 list_for_each_entry(substream, &stream->substreams, list) { 82 snprintf(substream->name, sizeof(substream->name), 83 "%s MIDI %d", name, substream->number + 1); 84 } 85 } 86 87 int snd_ff_create_midi_devices(struct snd_ff *ff) 88 { 89 static const struct snd_rawmidi_ops midi_capture_ops = { 90 .open = midi_capture_open, 91 .close = midi_capture_close, 92 .trigger = midi_capture_trigger, 93 }; 94 static const struct snd_rawmidi_ops midi_playback_ops = { 95 .open = midi_playback_open, 96 .close = midi_playback_close, 97 .trigger = midi_playback_trigger, 98 }; 99 struct snd_rawmidi *rmidi; 100 struct snd_rawmidi_str *stream; 101 int err; 102 103 err = snd_rawmidi_new(ff->card, ff->card->driver, 0, 104 ff->spec->midi_out_ports, ff->spec->midi_in_ports, 105 &rmidi); 106 if (err < 0) 107 return err; 108 109 snprintf(rmidi->name, sizeof(rmidi->name), 110 "%s MIDI", ff->card->shortname); 111 rmidi->private_data = ff; 112 113 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 114 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 115 &midi_capture_ops); 116 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 117 set_midi_substream_names(stream, ff->card->shortname); 118 119 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 120 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 121 &midi_playback_ops); 122 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 123 set_midi_substream_names(stream, ff->card->shortname); 124 125 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 126 127 return 0; 128 } 129