1/*
2 * fireworks_midi.c - a part of driver for Fireworks based devices
3 *
4 * Copyright (c) 2009-2010 Clemens Ladisch
5 * Copyright (c) 2013-2014 Takashi Sakamoto
6 *
7 * Licensed under the terms of the GNU General Public License, version 2.
8 */
9#include "fireworks.h"
10
11static int midi_capture_open(struct snd_rawmidi_substream *substream)
12{
13	struct snd_efw *efw = substream->rmidi->private_data;
14	int err;
15
16	err = snd_efw_stream_lock_try(efw);
17	if (err < 0)
18		goto end;
19
20	atomic_inc(&efw->capture_substreams);
21	err = snd_efw_stream_start_duplex(efw, 0);
22	if (err < 0)
23		snd_efw_stream_lock_release(efw);
24
25end:
26	return err;
27}
28
29static int midi_playback_open(struct snd_rawmidi_substream *substream)
30{
31	struct snd_efw *efw = substream->rmidi->private_data;
32	int err;
33
34	err = snd_efw_stream_lock_try(efw);
35	if (err < 0)
36		goto end;
37
38	atomic_inc(&efw->playback_substreams);
39	err = snd_efw_stream_start_duplex(efw, 0);
40	if (err < 0)
41		snd_efw_stream_lock_release(efw);
42end:
43	return err;
44}
45
46static int midi_capture_close(struct snd_rawmidi_substream *substream)
47{
48	struct snd_efw *efw = substream->rmidi->private_data;
49
50	atomic_dec(&efw->capture_substreams);
51	snd_efw_stream_stop_duplex(efw);
52
53	snd_efw_stream_lock_release(efw);
54	return 0;
55}
56
57static int midi_playback_close(struct snd_rawmidi_substream *substream)
58{
59	struct snd_efw *efw = substream->rmidi->private_data;
60
61	atomic_dec(&efw->playback_substreams);
62	snd_efw_stream_stop_duplex(efw);
63
64	snd_efw_stream_lock_release(efw);
65	return 0;
66}
67
68static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
69{
70	struct snd_efw *efw = substrm->rmidi->private_data;
71	unsigned long flags;
72
73	spin_lock_irqsave(&efw->lock, flags);
74
75	if (up)
76		amdtp_am824_midi_trigger(&efw->tx_stream,
77					  substrm->number, substrm);
78	else
79		amdtp_am824_midi_trigger(&efw->tx_stream,
80					  substrm->number, NULL);
81
82	spin_unlock_irqrestore(&efw->lock, flags);
83}
84
85static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
86{
87	struct snd_efw *efw = substrm->rmidi->private_data;
88	unsigned long flags;
89
90	spin_lock_irqsave(&efw->lock, flags);
91
92	if (up)
93		amdtp_am824_midi_trigger(&efw->rx_stream,
94					 substrm->number, substrm);
95	else
96		amdtp_am824_midi_trigger(&efw->rx_stream,
97					 substrm->number, NULL);
98
99	spin_unlock_irqrestore(&efw->lock, flags);
100}
101
102static struct snd_rawmidi_ops midi_capture_ops = {
103	.open		= midi_capture_open,
104	.close		= midi_capture_close,
105	.trigger	= midi_capture_trigger,
106};
107
108static struct snd_rawmidi_ops midi_playback_ops = {
109	.open		= midi_playback_open,
110	.close		= midi_playback_close,
111	.trigger	= midi_playback_trigger,
112};
113
114static void set_midi_substream_names(struct snd_efw *efw,
115				     struct snd_rawmidi_str *str)
116{
117	struct snd_rawmidi_substream *subs;
118
119	list_for_each_entry(subs, &str->substreams, list) {
120		snprintf(subs->name, sizeof(subs->name),
121			 "%s MIDI %d", efw->card->shortname, subs->number + 1);
122	}
123}
124
125int snd_efw_create_midi_devices(struct snd_efw *efw)
126{
127	struct snd_rawmidi *rmidi;
128	struct snd_rawmidi_str *str;
129	int err;
130
131	/* create midi ports */
132	err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
133			      efw->midi_out_ports, efw->midi_in_ports,
134			      &rmidi);
135	if (err < 0)
136		return err;
137
138	snprintf(rmidi->name, sizeof(rmidi->name),
139		 "%s MIDI", efw->card->shortname);
140	rmidi->private_data = efw;
141
142	if (efw->midi_in_ports > 0) {
143		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
144
145		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
146				    &midi_capture_ops);
147
148		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
149
150		set_midi_substream_names(efw, str);
151	}
152
153	if (efw->midi_out_ports > 0) {
154		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
155
156		snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
157				    &midi_playback_ops);
158
159		str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
160
161		set_midi_substream_names(efw, str);
162	}
163
164	if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
165		rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
166
167	return 0;
168}
169