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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * fireworks_midi.c - a part of driver for Fireworks based devices
4 *
5 * Copyright (c) 2009-2010 Clemens Ladisch
6 * Copyright (c) 2013-2014 Takashi Sakamoto
7 */
8#include "fireworks.h"
9
10static int midi_open(struct snd_rawmidi_substream *substream)
11{
12 struct snd_efw *efw = substream->rmidi->private_data;
13 int err;
14
15 err = snd_efw_stream_lock_try(efw);
16 if (err < 0)
17 return err;
18
19 scoped_guard(mutex, &efw->mutex) {
20 err = snd_efw_stream_reserve_duplex(efw, 0, 0, 0);
21 if (err >= 0) {
22 ++efw->substreams_counter;
23 err = snd_efw_stream_start_duplex(efw);
24 if (err < 0)
25 --efw->substreams_counter;
26 }
27 }
28 if (err < 0)
29 snd_efw_stream_lock_release(efw);
30 return err;
31}
32
33static int midi_close(struct snd_rawmidi_substream *substream)
34{
35 struct snd_efw *efw = substream->rmidi->private_data;
36
37 scoped_guard(mutex, &efw->mutex) {
38 --efw->substreams_counter;
39 snd_efw_stream_stop_duplex(efw);
40 }
41
42 snd_efw_stream_lock_release(efw);
43 return 0;
44}
45
46static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
47{
48 struct snd_efw *efw = substrm->rmidi->private_data;
49
50 guard(spinlock_irqsave)(&efw->lock);
51
52 if (up)
53 amdtp_am824_midi_trigger(&efw->tx_stream,
54 substrm->number, substrm);
55 else
56 amdtp_am824_midi_trigger(&efw->tx_stream,
57 substrm->number, NULL);
58}
59
60static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
61{
62 struct snd_efw *efw = substrm->rmidi->private_data;
63
64 guard(spinlock_irqsave)(&efw->lock);
65
66 if (up)
67 amdtp_am824_midi_trigger(&efw->rx_stream,
68 substrm->number, substrm);
69 else
70 amdtp_am824_midi_trigger(&efw->rx_stream,
71 substrm->number, NULL);
72}
73
74static void set_midi_substream_names(struct snd_efw *efw,
75 struct snd_rawmidi_str *str)
76{
77 struct snd_rawmidi_substream *subs;
78
79 list_for_each_entry(subs, &str->substreams, list) {
80 scnprintf(subs->name, sizeof(subs->name),
81 "%s MIDI %d", efw->card->shortname, subs->number + 1);
82 }
83}
84
85int snd_efw_create_midi_devices(struct snd_efw *efw)
86{
87 static const struct snd_rawmidi_ops capture_ops = {
88 .open = midi_open,
89 .close = midi_close,
90 .trigger = midi_capture_trigger,
91 };
92 static const struct snd_rawmidi_ops playback_ops = {
93 .open = midi_open,
94 .close = midi_close,
95 .trigger = midi_playback_trigger,
96 };
97 struct snd_rawmidi *rmidi;
98 struct snd_rawmidi_str *str;
99 int err;
100
101 /* create midi ports */
102 err = snd_rawmidi_new(efw->card, efw->card->driver, 0,
103 efw->midi_out_ports, efw->midi_in_ports,
104 &rmidi);
105 if (err < 0)
106 return err;
107
108 snprintf(rmidi->name, sizeof(rmidi->name),
109 "%s MIDI", efw->card->shortname);
110 rmidi->private_data = efw;
111
112 if (efw->midi_in_ports > 0) {
113 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
114
115 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
116 &capture_ops);
117
118 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
119
120 set_midi_substream_names(efw, str);
121 }
122
123 if (efw->midi_out_ports > 0) {
124 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
125
126 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
127 &playback_ops);
128
129 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
130
131 set_midi_substream_names(efw, str);
132 }
133
134 if ((efw->midi_out_ports > 0) && (efw->midi_in_ports > 0))
135 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
136
137 return 0;
138}