ALSA: bebob: Add hwdep interface
[deliverable/linux.git] / sound / firewire / bebob / bebob_midi.c
1 /*
2 * bebob_midi.c - a part of driver for BeBoB based devices
3 *
4 * Copyright (c) 2013-2014 Takashi Sakamoto
5 *
6 * Licensed under the terms of the GNU General Public License, version 2.
7 */
8
9 #include "bebob.h"
10
11 static int midi_capture_open(struct snd_rawmidi_substream *substream)
12 {
13 struct snd_bebob *bebob = substream->rmidi->private_data;
14 int err;
15
16 err = snd_bebob_stream_lock_try(bebob);
17 if (err < 0)
18 goto end;
19
20 atomic_inc(&bebob->capture_substreams);
21 err = snd_bebob_stream_start_duplex(bebob, 0);
22 if (err < 0)
23 snd_bebob_stream_lock_release(bebob);
24 end:
25 return err;
26 }
27
28 static int midi_playback_open(struct snd_rawmidi_substream *substream)
29 {
30 struct snd_bebob *bebob = substream->rmidi->private_data;
31 int err;
32
33 err = snd_bebob_stream_lock_try(bebob);
34 if (err < 0)
35 goto end;
36
37 atomic_inc(&bebob->playback_substreams);
38 err = snd_bebob_stream_start_duplex(bebob, 0);
39 if (err < 0)
40 snd_bebob_stream_lock_release(bebob);
41 end:
42 return err;
43 }
44
45 static int midi_capture_close(struct snd_rawmidi_substream *substream)
46 {
47 struct snd_bebob *bebob = substream->rmidi->private_data;
48
49 atomic_dec(&bebob->capture_substreams);
50 snd_bebob_stream_stop_duplex(bebob);
51
52 snd_bebob_stream_lock_release(bebob);
53 return 0;
54 }
55
56 static int midi_playback_close(struct snd_rawmidi_substream *substream)
57 {
58 struct snd_bebob *bebob = substream->rmidi->private_data;
59
60 atomic_dec(&bebob->playback_substreams);
61 snd_bebob_stream_stop_duplex(bebob);
62
63 snd_bebob_stream_lock_release(bebob);
64 return 0;
65 }
66
67 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
68 {
69 struct snd_bebob *bebob = substrm->rmidi->private_data;
70 unsigned long flags;
71
72 spin_lock_irqsave(&bebob->lock, flags);
73
74 if (up)
75 amdtp_stream_midi_trigger(&bebob->tx_stream,
76 substrm->number, substrm);
77 else
78 amdtp_stream_midi_trigger(&bebob->tx_stream,
79 substrm->number, NULL);
80
81 spin_unlock_irqrestore(&bebob->lock, flags);
82 }
83
84 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
85 {
86 struct snd_bebob *bebob = substrm->rmidi->private_data;
87 unsigned long flags;
88
89 spin_lock_irqsave(&bebob->lock, flags);
90
91 if (up)
92 amdtp_stream_midi_trigger(&bebob->rx_stream,
93 substrm->number, substrm);
94 else
95 amdtp_stream_midi_trigger(&bebob->rx_stream,
96 substrm->number, NULL);
97
98 spin_unlock_irqrestore(&bebob->lock, flags);
99 }
100
101 static struct snd_rawmidi_ops midi_capture_ops = {
102 .open = midi_capture_open,
103 .close = midi_capture_close,
104 .trigger = midi_capture_trigger,
105 };
106
107 static struct snd_rawmidi_ops midi_playback_ops = {
108 .open = midi_playback_open,
109 .close = midi_playback_close,
110 .trigger = midi_playback_trigger,
111 };
112
113 static void set_midi_substream_names(struct snd_bebob *bebob,
114 struct snd_rawmidi_str *str)
115 {
116 struct snd_rawmidi_substream *subs;
117
118 list_for_each_entry(subs, &str->substreams, list) {
119 snprintf(subs->name, sizeof(subs->name),
120 "%s MIDI %d",
121 bebob->card->shortname, subs->number + 1);
122 }
123 }
124
125 int snd_bebob_create_midi_devices(struct snd_bebob *bebob)
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(bebob->card, bebob->card->driver, 0,
133 bebob->midi_output_ports, bebob->midi_input_ports,
134 &rmidi);
135 if (err < 0)
136 return err;
137
138 snprintf(rmidi->name, sizeof(rmidi->name),
139 "%s MIDI", bebob->card->shortname);
140 rmidi->private_data = bebob;
141
142 if (bebob->midi_input_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(bebob, str);
151 }
152
153 if (bebob->midi_output_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(bebob, str);
162 }
163
164 if ((bebob->midi_output_ports > 0) && (bebob->midi_input_ports > 0))
165 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
166
167 return 0;
168 }
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