1/*
  2 * tascam-midi.c - a part of driver for TASCAM FireWire series
  3 *
  4 * Copyright (c) 2015 Takashi Sakamoto
  5 *
  6 * Licensed under the terms of the GNU General Public License, version 2.
  7 */
  8
  9#include "tascam.h"
 10
 11static int midi_capture_open(struct snd_rawmidi_substream *substream)
 12{
 13	/* Do nothing. */
 14	return 0;
 15}
 16
 17static int midi_playback_open(struct snd_rawmidi_substream *substream)
 18{
 19	struct snd_tscm *tscm = substream->rmidi->private_data;
 20
 21	/* Initialize internal status. */
 22	tscm->running_status[substream->number] = 0;
 23	tscm->on_sysex[substream->number] = 0;
 24	return 0;
 25}
 26
 27static int midi_capture_close(struct snd_rawmidi_substream *substream)
 28{
 29	/* Do nothing. */
 30	return 0;
 31}
 32
 33static int midi_playback_close(struct snd_rawmidi_substream *substream)
 34{
 35	struct snd_tscm *tscm = substream->rmidi->private_data;
 36
 37	snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
 38
 39	return 0;
 40}
 41
 42static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
 43{
 44	struct snd_tscm *tscm = substrm->rmidi->private_data;
 45	unsigned long flags;
 46
 47	spin_lock_irqsave(&tscm->lock, flags);
 48
 49	if (up)
 50		tscm->tx_midi_substreams[substrm->number] = substrm;
 51	else
 52		tscm->tx_midi_substreams[substrm->number] = NULL;
 53
 54	spin_unlock_irqrestore(&tscm->lock, flags);
 55}
 56
 57static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
 58{
 59	struct snd_tscm *tscm = substrm->rmidi->private_data;
 60	unsigned long flags;
 61
 62	spin_lock_irqsave(&tscm->lock, flags);
 63
 64	if (up)
 65		snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
 66					   substrm);
 67
 68	spin_unlock_irqrestore(&tscm->lock, flags);
 69}
 70
 71static struct snd_rawmidi_ops midi_capture_ops = {
 72	.open		= midi_capture_open,
 73	.close		= midi_capture_close,
 74	.trigger	= midi_capture_trigger,
 75};
 76
 77static struct snd_rawmidi_ops midi_playback_ops = {
 78	.open		= midi_playback_open,
 79	.close		= midi_playback_close,
 80	.trigger	= midi_playback_trigger,
 81};
 82
 83int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
 84{
 85	struct snd_rawmidi *rmidi;
 86	struct snd_rawmidi_str *stream;
 87	struct snd_rawmidi_substream *subs;
 88	int err;
 89
 90	err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
 91			      tscm->spec->midi_playback_ports,
 92			      tscm->spec->midi_capture_ports,
 93			      &rmidi);
 94	if (err < 0)
 95		return err;
 96
 97	snprintf(rmidi->name, sizeof(rmidi->name),
 98		 "%s MIDI", tscm->card->shortname);
 99	rmidi->private_data = tscm;
100
101	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
102	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
103			    &midi_capture_ops);
104	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
105
106	/* Set port names for MIDI input. */
107	list_for_each_entry(subs, &stream->substreams, list) {
108		/* TODO: support virtual MIDI ports. */
109		if (subs->number < tscm->spec->midi_capture_ports) {
110			/* Hardware MIDI ports. */
111			snprintf(subs->name, sizeof(subs->name),
112				 "%s MIDI %d",
113				 tscm->card->shortname, subs->number + 1);
114		}
115	}
116
117	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
118	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
119			    &midi_playback_ops);
120	stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
121
122	/* Set port names for MIDI ourput. */
123	list_for_each_entry(subs, &stream->substreams, list) {
124		if (subs->number < tscm->spec->midi_playback_ports) {
125			/* Hardware MIDI ports only. */
126			snprintf(subs->name, sizeof(subs->name),
127				 "%s MIDI %d",
128				 tscm->card->shortname, subs->number + 1);
129		}
130	}
131
132	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
133
134	return 0;
135}