1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * tascam-midi.c - a part of driver for TASCAM FireWire series
4 *
5 * Copyright (c) 2015 Takashi Sakamoto
6 */
7
8 #include "tascam.h"
9
midi_capture_open(struct snd_rawmidi_substream * substream)10 static int midi_capture_open(struct snd_rawmidi_substream *substream)
11 {
12 /* Do nothing. */
13 return 0;
14 }
15
midi_playback_open(struct snd_rawmidi_substream * substream)16 static int midi_playback_open(struct snd_rawmidi_substream *substream)
17 {
18 struct snd_tscm *tscm = substream->rmidi->private_data;
19
20 snd_fw_async_midi_port_init(&tscm->out_ports[substream->number]);
21
22 return 0;
23 }
24
midi_capture_close(struct snd_rawmidi_substream * substream)25 static int midi_capture_close(struct snd_rawmidi_substream *substream)
26 {
27 /* Do nothing. */
28 return 0;
29 }
30
midi_playback_close(struct snd_rawmidi_substream * substream)31 static int midi_playback_close(struct snd_rawmidi_substream *substream)
32 {
33 return 0;
34 }
35
midi_playback_drain(struct snd_rawmidi_substream * substream)36 static void midi_playback_drain(struct snd_rawmidi_substream *substream)
37 {
38 struct snd_tscm *tscm = substream->rmidi->private_data;
39
40 snd_fw_async_midi_port_finish(&tscm->out_ports[substream->number]);
41 }
42
midi_capture_trigger(struct snd_rawmidi_substream * substrm,int up)43 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
44 {
45 struct snd_tscm *tscm = substrm->rmidi->private_data;
46 unsigned long flags;
47
48 spin_lock_irqsave(&tscm->lock, flags);
49
50 if (up)
51 tscm->tx_midi_substreams[substrm->number] = substrm;
52 else
53 tscm->tx_midi_substreams[substrm->number] = NULL;
54
55 spin_unlock_irqrestore(&tscm->lock, flags);
56 }
57
midi_playback_trigger(struct snd_rawmidi_substream * substrm,int up)58 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
59 {
60 struct snd_tscm *tscm = substrm->rmidi->private_data;
61 unsigned long flags;
62
63 spin_lock_irqsave(&tscm->lock, flags);
64
65 if (up)
66 snd_fw_async_midi_port_run(&tscm->out_ports[substrm->number],
67 substrm);
68
69 spin_unlock_irqrestore(&tscm->lock, flags);
70 }
71
snd_tscm_create_midi_devices(struct snd_tscm * tscm)72 int snd_tscm_create_midi_devices(struct snd_tscm *tscm)
73 {
74 static const struct snd_rawmidi_ops capture_ops = {
75 .open = midi_capture_open,
76 .close = midi_capture_close,
77 .trigger = midi_capture_trigger,
78 };
79 static const struct snd_rawmidi_ops playback_ops = {
80 .open = midi_playback_open,
81 .close = midi_playback_close,
82 .drain = midi_playback_drain,
83 .trigger = midi_playback_trigger,
84 };
85 struct snd_rawmidi *rmidi;
86 struct snd_rawmidi_str *stream;
87 struct snd_rawmidi_substream *subs;
88 int err;
89
90 err = snd_rawmidi_new(tscm->card, tscm->card->driver, 0,
91 tscm->spec->midi_playback_ports,
92 tscm->spec->midi_capture_ports,
93 &rmidi);
94 if (err < 0)
95 return err;
96
97 snprintf(rmidi->name, sizeof(rmidi->name),
98 "%s MIDI", tscm->card->shortname);
99 rmidi->private_data = tscm;
100
101 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
102 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
103 &capture_ops);
104 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
105
106 /* Set port names for MIDI input. */
107 list_for_each_entry(subs, &stream->substreams, list) {
108 /* TODO: support virtual MIDI ports. */
109 if (subs->number < tscm->spec->midi_capture_ports) {
110 /* Hardware MIDI ports. */
111 snprintf(subs->name, sizeof(subs->name),
112 "%s MIDI %d",
113 tscm->card->shortname, subs->number + 1);
114 }
115 }
116
117 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
118 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
119 &playback_ops);
120 stream = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
121
122 /* Set port names for MIDI ourput. */
123 list_for_each_entry(subs, &stream->substreams, list) {
124 if (subs->number < tscm->spec->midi_playback_ports) {
125 /* Hardware MIDI ports only. */
126 snprintf(subs->name, sizeof(subs->name),
127 "%s MIDI %d",
128 tscm->card->shortname, subs->number + 1);
129 }
130 }
131
132 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
133
134 return 0;
135 }
136