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, rate: 0, frames_per_period: 0, frames_per_buffer: 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(lock: &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(lock: &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(s: &motu->tx_stream, port: substrm->number, |
60 | midi: substrm); |
61 | else |
62 | amdtp_motu_midi_trigger(s: &motu->tx_stream, port: substrm->number, |
63 | NULL); |
64 | |
65 | spin_unlock_irqrestore(lock: &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(s: &motu->rx_stream, port: substrm->number, |
77 | midi: substrm); |
78 | else |
79 | amdtp_motu_midi_trigger(s: &motu->rx_stream, port: substrm->number, |
80 | NULL); |
81 | |
82 | spin_unlock_irqrestore(lock: &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(buf: subs->name, size: sizeof(subs->name), |
92 | fmt: "%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(card: motu->card, id: motu->card->driver, device: 0, output_count: 1, input_count: 1, rmidi: &rmidi); |
114 | if (err < 0) |
115 | return err; |
116 | |
117 | snprintf(buf: rmidi->name, size: sizeof(rmidi->name), |
118 | fmt: "%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, stream: SNDRV_RAWMIDI_STREAM_INPUT, |
126 | ops: &capture_ops); |
127 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]; |
128 | set_midi_substream_names(motu, str); |
129 | |
130 | snd_rawmidi_set_ops(rmidi, stream: SNDRV_RAWMIDI_STREAM_OUTPUT, |
131 | ops: &playback_ops); |
132 | str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]; |
133 | set_midi_substream_names(motu, str); |
134 | |
135 | return 0; |
136 | } |
137 | |