tascam-midi.c

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
  3 * tascam-midi.c - a part of driver for TASCAM FireWire series
  4 *
  5 * Copyright (c) 2015 Takashi Sakamoto
  6 */
  7
  8#include "tascam.h"
  9
 10static int midi_capture_open(struct snd_rawmidi_substream *substream)
 11{
 12	/* Do nothing. */
 13	return 0;
 14}
 15
 16static int midi_playback_open(struct snd_rawmidi_substream *substream)
 17{
 18	struct snd_tscm *tscm = substream->rmidi->private_data;
 19
 20	snd_fw_async_midi_port_init(&tscm->out_ports[substream->number]);
 21
 22	return 0;
 23}
 24
 25static int midi_capture_close(struct snd_rawmidi_substream *substream)
 26{
 27	/* Do nothing. */
 28	return 0;
 29}
 30
 31static int midi_playback_close(struct snd_rawmidi_substream *substream)
 32{
 33	return 0;
 34}
 35
 36static void midi_playback_drain(struct snd_rawmidi_substream *substream)
 37{
 38	struct snd_tscm *tscm = substream->rmidi->private_data;
 39
 40	snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
 41}
 42
 43static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
 44{
 45	struct snd_tscm *tscm = substrm->rmidi->private_data;
 46
 47	guard(spinlock_irqsave)(&tscm->lock);
 48
 49	if (up)
 50		tscm->tx_midi_substreams[substrm->number] = substrm;
 51	else
 52		tscm->tx_midi_substreams[substrm->number] = NULL;
 53}
 54
 55static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
 56{
 57	struct snd_tscm *tscm = substrm->rmidi->private_data;
 58
 59	guard(spinlock_irqsave)(&tscm->lock);
 60
 61	if (up)
 62		snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
 63					   substrm);
 64}
 65
 66int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
 67{
 68	static const struct snd_rawmidi_ops capture_ops = {
 69		.open		= midi_capture_open,
 70		.close		= midi_capture_close,
 71		.trigger	= midi_capture_trigger,
 72	};
 73	static const struct snd_rawmidi_ops playback_ops = {
 74		.open		= midi_playback_open,
 75		.close		= midi_playback_close,
 76		.drain		= midi_playback_drain,
 77		.trigger	= midi_playback_trigger,
 78	};
 79	struct snd_rawmidi *rmidi;
 80	struct snd_rawmidi_str *stream;
 81	struct snd_rawmidi_substream *subs;
 82	int err;
 83
 84	err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
 85			      tscm->spec->midi_playback_ports,
 86			      tscm->spec->midi_capture_ports,
 87			      &rmidi);
 88	if (err < 0)
 89		return err;
 90
 91	snprintf(rmidi->name, sizeof(rmidi->name),
 92		 "%s MIDI", tscm->card->shortname);
 93	rmidi->private_data = tscm;
 94
 95	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
 96	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 97			    &capture_ops);
 98	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
 99
100	/* Set port names for MIDI input. */
101	list_for_each_entry(subs, &stream->substreams, list) {
102		/* TODO: support virtual MIDI ports. */
103		if (subs->number < tscm->spec->midi_capture_ports) {
104			/* Hardware MIDI ports. */
105			scnprintf(subs->name, sizeof(subs->name),
106				  "%s MIDI %d",
107				  tscm->card->shortname, subs->number + 1);
108		}
109	}
110
111	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
112	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
113			    &playback_ops);
114	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
115
116	/* Set port names for MIDI ourput. */
117	list_for_each_entry(subs, &stream->substreams, list) {
118		if (subs->number < tscm->spec->midi_playback_ports) {
119			/* Hardware MIDI ports only. */
120			scnprintf(subs->name, sizeof(subs->name),
121				  "%s MIDI %d",
122				  tscm->card->shortname, subs->number + 1);
123		}
124	}
125
126	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
127
128	return 0;
129}