1 // SPDX-License-Identifier: GPL-2.0-only
3 * ff-midi.c - a part of driver for RME Fireface series
5 * Copyright (c) 2015-2017 Takashi Sakamoto
10 static int midi_capture_open(struct snd_rawmidi_substream *substream)
16 static int midi_playback_open(struct snd_rawmidi_substream *substream)
18 struct snd_ff *ff = substream->rmidi->private_data;
20 /* Initialize internal status. */
21 ff->on_sysex[substream->number] = 0;
22 ff->rx_midi_error[substream->number] = false;
24 WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream);
29 static int midi_capture_close(struct snd_rawmidi_substream *substream)
35 static int midi_playback_close(struct snd_rawmidi_substream *substream)
37 struct snd_ff *ff = substream->rmidi->private_data;
39 cancel_work_sync(&ff->rx_midi_work[substream->number]);
40 WRITE_ONCE(ff->rx_midi_substreams[substream->number], NULL);
45 static void midi_capture_trigger(struct snd_rawmidi_substream *substream,
48 struct snd_ff *ff = substream->rmidi->private_data;
51 spin_lock_irqsave(&ff->lock, flags);
54 WRITE_ONCE(ff->tx_midi_substreams[substream->number],
57 WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL);
59 spin_unlock_irqrestore(&ff->lock, flags);
62 static void midi_playback_trigger(struct snd_rawmidi_substream *substream,
65 struct snd_ff *ff = substream->rmidi->private_data;
68 spin_lock_irqsave(&ff->lock, flags);
70 if (up || !ff->rx_midi_error[substream->number])
71 schedule_work(&ff->rx_midi_work[substream->number]);
73 spin_unlock_irqrestore(&ff->lock, flags);
76 static void set_midi_substream_names(struct snd_rawmidi_str *stream,
77 const char *const name)
79 struct snd_rawmidi_substream *substream;
81 list_for_each_entry(substream, &stream->substreams, list) {
82 scnprintf(substream->name, sizeof(substream->name),
83 "%s MIDI %d", name, substream->number + 1);
87 int snd_ff_create_midi_devices(struct snd_ff *ff)
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,
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,
99 struct snd_rawmidi *rmidi;
100 struct snd_rawmidi_str *stream;
103 err = snd_rawmidi_new(ff->card, ff->card->driver, 0,
104 ff->spec->midi_out_ports, ff->spec->midi_in_ports,
109 snprintf(rmidi->name, sizeof(rmidi->name),
110 "%s MIDI", ff->card->shortname);
111 rmidi->private_data = ff;
113 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
114 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
116 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
117 set_midi_substream_names(stream, ff->card->shortname);
119 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
120 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
122 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
123 set_midi_substream_names(stream, ff->card->shortname);
125 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;