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 
midi_open(struct snd_rawmidi_substream * substream)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 
midi_close(struct snd_rawmidi_substream * substream)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 
midi_capture_trigger(struct snd_rawmidi_substream * substrm,int up)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 
midi_playback_trigger(struct snd_rawmidi_substream * substrm,int up)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 
set_midi_substream_names(struct snd_motu * motu,struct snd_rawmidi_str * str)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 		snprintf(subs->name, sizeof(subs->name),
92 			 "%s MIDI %d", motu->card->shortname, subs->number + 1);
93 	}
94 }
95 
snd_motu_create_midi_devices(struct snd_motu * motu)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