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 50 guard(spinlock_irqsave)(&ff->lock); 51 52 if (up) 53 WRITE_ONCE(ff->tx_midi_substreams[substream->number], 54 substream); 55 else 56 WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL); 57 } 58 59 static void midi_playback_trigger(struct snd_rawmidi_substream *substream, 60 int up) 61 { 62 struct snd_ff *ff = substream->rmidi->private_data; 63 64 guard(spinlock_irqsave)(&ff->lock); 65 66 if (up || !ff->rx_midi_error[substream->number]) 67 schedule_work(&ff->rx_midi_work[substream->number]); 68 } 69 70 static void set_midi_substream_names(struct snd_rawmidi_str *stream, 71 const char *const name) 72 { 73 struct snd_rawmidi_substream *substream; 74 75 list_for_each_entry(substream, &stream->substreams, list) { 76 scnprintf(substream->name, sizeof(substream->name), 77 "%s MIDI %d", name, substream->number + 1); 78 } 79 } 80 81 int snd_ff_create_midi_devices(struct snd_ff *ff) 82 { 83 static const struct snd_rawmidi_ops midi_capture_ops = { 84 .open = midi_capture_open, 85 .close = midi_capture_close, 86 .trigger = midi_capture_trigger, 87 }; 88 static const struct snd_rawmidi_ops midi_playback_ops = { 89 .open = midi_playback_open, 90 .close = midi_playback_close, 91 .trigger = midi_playback_trigger, 92 }; 93 struct snd_rawmidi *rmidi; 94 struct snd_rawmidi_str *stream; 95 int err; 96 97 err = snd_rawmidi_new(ff->card, ff->card->driver, 0, 98 ff->spec->midi_out_ports, ff->spec->midi_in_ports, 99 &rmidi); 100 if (err < 0) 101 return err; 102 103 snprintf(rmidi->name, sizeof(rmidi->name), 104 "%s MIDI", ff->card->shortname); 105 rmidi->private_data = ff; 106 107 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT; 108 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 109 &midi_capture_ops); 110 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; 111 set_midi_substream_names(stream, ff->card->shortname); 112 113 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT; 114 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 115 &midi_playback_ops); 116 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; 117 set_midi_substream_names(stream, ff->card->shortname); 118 119 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX; 120 121 return 0; 122 } 123