summaryrefslogtreecommitdiff
path: root/sound/firewire/motu/motu-midi.c
blob: e3acfcc53f4e3a02b4393dc3e8c97b46be3a68ef (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
/*
 * motu-midi.h - a part of driver for MOTU FireWire series
 *
 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
 *
 * Licensed under the terms of the GNU General Public License, version 2.
 */
#include "motu.h"

static int midi_capture_open(struct snd_rawmidi_substream *substream)
{
	struct snd_motu *motu = substream->rmidi->private_data;
	int err;

	err = snd_motu_stream_lock_try(motu);
	if (err < 0)
		return err;

	mutex_lock(&motu->mutex);

	motu->capture_substreams++;
	err = snd_motu_stream_start_duplex(motu, 0);

	mutex_unlock(&motu->mutex);

	if (err < 0)
		snd_motu_stream_lock_release(motu);

	return err;
}

static int midi_playback_open(struct snd_rawmidi_substream *substream)
{
	struct snd_motu *motu = substream->rmidi->private_data;
	int err;

	err = snd_motu_stream_lock_try(motu);
	if (err < 0)
		return err;

	mutex_lock(&motu->mutex);

	motu->playback_substreams++;
	err = snd_motu_stream_start_duplex(motu, 0);

	mutex_unlock(&motu->mutex);

	if (err < 0)
		snd_motu_stream_lock_release(motu);

	return err;
}

static int midi_capture_close(struct snd_rawmidi_substream *substream)
{
	struct snd_motu *motu = substream->rmidi->private_data;

	mutex_lock(&motu->mutex);

	motu->capture_substreams--;
	snd_motu_stream_stop_duplex(motu);

	mutex_unlock(&motu->mutex);

	snd_motu_stream_lock_release(motu);
	return 0;
}

static int midi_playback_close(struct snd_rawmidi_substream *substream)
{
	struct snd_motu *motu = substream->rmidi->private_data;

	mutex_lock(&motu->mutex);

	motu->playback_substreams--;
	snd_motu_stream_stop_duplex(motu);

	mutex_unlock(&motu->mutex);

	snd_motu_stream_lock_release(motu);
	return 0;
}

static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
	struct snd_motu *motu = substrm->rmidi->private_data;
	unsigned long flags;

	spin_lock_irqsave(&motu->lock, flags);

	if (up)
		amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
					substrm);
	else
		amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
					NULL);

	spin_unlock_irqrestore(&motu->lock, flags);
}

static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
	struct snd_motu *motu = substrm->rmidi->private_data;
	unsigned long flags;

	spin_lock_irqsave(&motu->lock, flags);

	if (up)
		amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
					substrm);
	else
		amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
					NULL);

	spin_unlock_irqrestore(&motu->lock, flags);
}

static void set_midi_substream_names(struct snd_motu *motu,
				     struct snd_rawmidi_str *str)
{
	struct snd_rawmidi_substream *subs;

	list_for_each_entry(subs, &str->substreams, list) {
		snprintf(subs->name, sizeof(subs->name),
			 "%s MIDI %d", motu->card->shortname, subs->number + 1);
	}
}

int snd_motu_create_midi_devices(struct snd_motu *motu)
{
	static struct snd_rawmidi_ops capture_ops = {
		.open		= midi_capture_open,
		.close		= midi_capture_close,
		.trigger	= midi_capture_trigger,
	};
	static struct snd_rawmidi_ops playback_ops = {
		.open		= midi_playback_open,
		.close		= midi_playback_close,
		.trigger	= midi_playback_trigger,
	};
	struct snd_rawmidi *rmidi;
	struct snd_rawmidi_str *str;
	int err;

	/* create midi ports */
	err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi);
	if (err < 0)
		return err;

	snprintf(rmidi->name, sizeof(rmidi->name),
		 "%s MIDI", motu->card->shortname);
	rmidi->private_data = motu;

	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
			     SNDRV_RAWMIDI_INFO_OUTPUT |
			     SNDRV_RAWMIDI_INFO_DUPLEX;

	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
			    &capture_ops);
	str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
	set_midi_substream_names(motu, str);

	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
			    &playback_ops);
	str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
	set_midi_substream_names(motu, str);

	return 0;
}