1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ff-midi.c - a part of driver for RME Fireface series
4 *
5 * Copyright (c) 2015-2017 Takashi Sakamoto
6 */
7
8 #include "ff.h"
9
10 static int midi_capture_open(struct snd_rawmidi_substream *substream)
11 {
12 /* Do nothing. */
13 return 0;
14 }
15
16 static int midi_playback_open(struct snd_rawmidi_substream *substream)
17 {
18 struct snd_ff *ff = substream->rmidi->private_data;
19
20 /* Initialize internal status. */
21 ff->on_sysex[substream->number] = 0;
22 ff->rx_midi_error[substream->number] = false;
23
24 WRITE_ONCE(ff->rx_midi_substreams[substream->number], substream);
25
26 return 0;
27 }
28
29 static int midi_capture_close(struct snd_rawmidi_substream *substream)
30 {
31 /* Do nothing. */
32 return 0;
33 }
34
35 static int midi_playback_close(struct snd_rawmidi_substream *substream)
36 {
37 struct snd_ff *ff = substream->rmidi->private_data;
38
39 cancel_work_sync(&ff->rx_midi_work[substream->number]);
40 WRITE_ONCE(ff->rx_midi_substreams[substream->number], NULL);
41
42 return 0;
43 }
44
45 static void midi_capture_trigger(struct snd_rawmidi_substream *substream,
46 int up)
47 {
48 struct snd_ff *ff = substream->rmidi->private_data;
49 unsigned long flags;
50
51 spin_lock_irqsave(&ff->lock, flags);
52
53 if (up)
54 WRITE_ONCE(ff->tx_midi_substreams[substream->number],
55 substream);
56 else
57 WRITE_ONCE(ff->tx_midi_substreams[substream->number], NULL);
58
59 spin_unlock_irqrestore(&ff->lock, flags);
60 }
61
62 static void midi_playback_trigger(struct snd_rawmidi_substream *substream,
63 int up)
64 {
65 struct snd_ff *ff = substream->rmidi->private_data;
66 unsigned long flags;
67
68 spin_lock_irqsave(&ff->lock, flags);
69
70 if (up || !ff->rx_midi_error[substream->number])
71 schedule_work(&ff->rx_midi_work[substream->number]);
72
73 spin_unlock_irqrestore(&ff->lock, flags);
74 }
75
76 static void set_midi_substream_names(struct snd_rawmidi_str *stream,
77 const char *const name)
78 {
79 struct snd_rawmidi_substream *substream;
80
81 list_for_each_entry(substream, &stream->substreams, list) {
82 scnprintf(substream->name, sizeof(substream->name),
83 "%s MIDI %d", name, substream->number + 1);
84 }
85 }
86
87 int snd_ff_create_midi_devices(struct snd_ff *ff)
88 {
89 static const struct snd_rawmidi_ops midi_capture_ops = {
90 .open = midi_capture_open,
91 .close = midi_capture_close,
92 .trigger = midi_capture_trigger,
93 };
94 static const struct snd_rawmidi_ops midi_playback_ops = {
95 .open = midi_playback_open,
96 .close = midi_playback_close,
97 .trigger = midi_playback_trigger,
98 };
99 struct snd_rawmidi *rmidi;
100 struct snd_rawmidi_str *stream;
101 int err;
102
103 err = snd_rawmidi_new(ff->card, ff->card->driver, 0,
104 ff->spec->midi_out_ports, ff->spec->midi_in_ports,
105 &rmidi);
106 if (err < 0)
107 return err;
108
109 snprintf(rmidi->name, sizeof(rmidi->name),
110 "%s MIDI", ff->card->shortname);
111 rmidi->private_data = ff;
112
113 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
114 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
115 &midi_capture_ops);
116 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
117 set_midi_substream_names(stream, ff->card->shortname);
118
119 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
120 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
121 &midi_playback_ops);
122 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
123 set_midi_substream_names(stream, ff->card->shortname);
124
125 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
126
127 return 0;
128 }
129
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