1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * motu-midi.h - a part of driver for MOTU FireWire series
4 *
5 * Copyright (c) 2015-2017 Takashi Sakamoto <o-takashi@sakamocchi.jp>
6 */
7 #include "motu.h"
8
9 static int midi_open(struct snd_rawmidi_substream *substream)
10 {
11 struct snd_motu *motu = substream->rmidi->private_data;
12 int err;
13
14 err = snd_motu_stream_lock_try(motu);
15 if (err < 0)
16 return err;
17
18 mutex_lock(&motu->mutex);
19
20 err = snd_motu_stream_reserve_duplex(motu, 0, 0, 0);
21 if (err >= 0) {
22 ++motu->substreams_counter;
23 err = snd_motu_stream_start_duplex(motu);
24 if (err < 0)
25 --motu->substreams_counter;
26 }
27
28 mutex_unlock(&motu->mutex);
29
30 if (err < 0)
31 snd_motu_stream_lock_release(motu);
32
33 return err;
34 }
35
36 static int midi_close(struct snd_rawmidi_substream *substream)
37 {
38 struct snd_motu *motu = substream->rmidi->private_data;
39
40 mutex_lock(&motu->mutex);
41
42 --motu->substreams_counter;
43 snd_motu_stream_stop_duplex(motu);
44
45 mutex_unlock(&motu->mutex);
46
47 snd_motu_stream_lock_release(motu);
48 return 0;
49 }
50
51 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
52 {
53 struct snd_motu *motu = substrm->rmidi->private_data;
54 unsigned long flags;
55
56 spin_lock_irqsave(&motu->lock, flags);
57
58 if (up)
59 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
60 substrm);
61 else
62 amdtp_motu_midi_trigger(&motu->tx_stream, substrm->number,
63 NULL);
64
65 spin_unlock_irqrestore(&motu->lock, flags);
66 }
67
68 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
69 {
70 struct snd_motu *motu = substrm->rmidi->private_data;
71 unsigned long flags;
72
73 spin_lock_irqsave(&motu->lock, flags);
74
75 if (up)
76 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
77 substrm);
78 else
79 amdtp_motu_midi_trigger(&motu->rx_stream, substrm->number,
80 NULL);
81
82 spin_unlock_irqrestore(&motu->lock, flags);
83 }
84
85 static void set_midi_substream_names(struct snd_motu *motu,
86 struct snd_rawmidi_str *str)
87 {
88 struct snd_rawmidi_substream *subs;
89
90 list_for_each_entry(subs, &str->substreams, list) {
91 scnprintf(subs->name, sizeof(subs->name),
92 "%s MIDI %d", motu->card->shortname, subs->number + 1);
93 }
94 }
95
96 int snd_motu_create_midi_devices(struct snd_motu *motu)
97 {
98 static const struct snd_rawmidi_ops capture_ops = {
99 .open = midi_open,
100 .close = midi_close,
101 .trigger = midi_capture_trigger,
102 };
103 static const struct snd_rawmidi_ops playback_ops = {
104 .open = midi_open,
105 .close = midi_close,
106 .trigger = midi_playback_trigger,
107 };
108 struct snd_rawmidi *rmidi;
109 struct snd_rawmidi_str *str;
110 int err;
111
112 /* create midi ports */
113 err = snd_rawmidi_new(motu->card, motu->card->driver, 0, 1, 1, &rmidi);
114 if (err < 0)
115 return err;
116
117 snprintf(rmidi->name, sizeof(rmidi->name),
118 "%s MIDI", motu->card->shortname);
119 rmidi->private_data = motu;
120
121 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
122 SNDRV_RAWMIDI_INFO_OUTPUT |
123 SNDRV_RAWMIDI_INFO_DUPLEX;
124
125 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
126 &capture_ops);
127 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
128 set_midi_substream_names(motu, str);
129
130 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
131 &playback_ops);
132 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
133 set_midi_substream_names(motu, str);
134
135 return 0;
136 }
137
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