1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * digi00x-midi.h - a part of driver for Digidesign Digi 002/003 family
4 *
5 * Copyright (c) 2014-2015 Takashi Sakamoto
6 */
7
8#include "digi00x.h"
9
10static int midi_open(struct snd_rawmidi_substream *substream)
11{
12	struct snd_dg00x *dg00x = substream->rmidi->private_data;
13	int err;
14
15	err = snd_dg00x_stream_lock_try(dg00x);
16	if (err < 0)
17		return err;
18
19	mutex_lock(&dg00x->mutex);
20	err = snd_dg00x_stream_reserve_duplex(dg00x, 0, 0, 0);
21	if (err >= 0) {
22		++dg00x->substreams_counter;
23		err = snd_dg00x_stream_start_duplex(dg00x);
24		if (err < 0)
25			--dg00x->substreams_counter;
26	}
27	mutex_unlock(&dg00x->mutex);
28	if (err < 0)
29		snd_dg00x_stream_lock_release(dg00x);
30
31	return err;
32}
33
34static int midi_close(struct snd_rawmidi_substream *substream)
35{
36	struct snd_dg00x *dg00x = substream->rmidi->private_data;
37
38	mutex_lock(&dg00x->mutex);
39	--dg00x->substreams_counter;
40	snd_dg00x_stream_stop_duplex(dg00x);
41	mutex_unlock(&dg00x->mutex);
42
43	snd_dg00x_stream_lock_release(dg00x);
44	return 0;
45}
46
47static void midi_capture_trigger(struct snd_rawmidi_substream *substream,
48				 int up)
49{
50	struct snd_dg00x *dg00x = substream->rmidi->private_data;
51	unsigned int port;
52	unsigned long flags;
53
54	if (substream->rmidi->device == 0)
55		port = substream->number;
56	else
57		port = 2;
58
59	spin_lock_irqsave(&dg00x->lock, flags);
60
61	if (up)
62		amdtp_dot_midi_trigger(&dg00x->tx_stream, port, substream);
63	else
64		amdtp_dot_midi_trigger(&dg00x->tx_stream, port, NULL);
65
66	spin_unlock_irqrestore(&dg00x->lock, flags);
67}
68
69static void midi_playback_trigger(struct snd_rawmidi_substream *substream,
70				  int up)
71{
72	struct snd_dg00x *dg00x = substream->rmidi->private_data;
73	unsigned int port;
74	unsigned long flags;
75
76	if (substream->rmidi->device == 0)
77		port = substream->number;
78	else
79		port = 2;
80
81	spin_lock_irqsave(&dg00x->lock, flags);
82
83	if (up)
84		amdtp_dot_midi_trigger(&dg00x->rx_stream, port, substream);
85	else
86		amdtp_dot_midi_trigger(&dg00x->rx_stream, port, NULL);
87
88	spin_unlock_irqrestore(&dg00x->lock, flags);
89}
90
91static void set_substream_names(struct snd_dg00x *dg00x,
92				struct snd_rawmidi *rmidi, bool is_console)
93{
94	struct snd_rawmidi_substream *subs;
95	struct snd_rawmidi_str *str;
96	int i;
97
98	for (i = 0; i < 2; ++i) {
99		str = &rmidi->streams[i];
100
101		list_for_each_entry(subs, &str->substreams, list) {
102			if (!is_console) {
103				scnprintf(subs->name, sizeof(subs->name),
104					  "%s MIDI %d",
105					  dg00x->card->shortname,
106					  subs->number + 1);
107			} else {
108				scnprintf(subs->name, sizeof(subs->name),
109					  "%s control",
110					  dg00x->card->shortname);
111			}
112		}
113	}
114}
115
116static int add_substream_pair(struct snd_dg00x *dg00x, unsigned int out_ports,
117			      unsigned int in_ports, bool is_console)
118{
119	static const struct snd_rawmidi_ops capture_ops = {
120		.open = midi_open,
121		.close = midi_close,
122		.trigger = midi_capture_trigger,
123	};
124	static const struct snd_rawmidi_ops playback_ops = {
125		.open = midi_open,
126		.close = midi_close,
127		.trigger = midi_playback_trigger,
128	};
129	const char *label;
130	struct snd_rawmidi *rmidi;
131	int err;
132
133	/* Add physical midi ports. */
134	err = snd_rawmidi_new(dg00x->card, dg00x->card->driver, is_console,
135			      out_ports, in_ports, &rmidi);
136	if (err < 0)
137		return err;
138	rmidi->private_data = dg00x;
139
140	if (!is_console)
141		label = "%s control";
142	else
143		label = "%s MIDI";
144	snprintf(rmidi->name, sizeof(rmidi->name), label,
145		 dg00x->card->shortname);
146
147	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &playback_ops);
148	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &capture_ops);
149
150	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT |
151			     SNDRV_RAWMIDI_INFO_OUTPUT |
152			     SNDRV_RAWMIDI_INFO_DUPLEX;
153
154	set_substream_names(dg00x, rmidi, is_console);
155
156	return 0;
157}
158
159int snd_dg00x_create_midi_devices(struct snd_dg00x *dg00x)
160{
161	int err;
162
163	/* Add physical midi ports. */
164	err = add_substream_pair(dg00x, DOT_MIDI_OUT_PORTS, DOT_MIDI_IN_PORTS,
165				 false);
166	if (err < 0)
167		return err;
168
169	if (dg00x->is_console)
170		err = add_substream_pair(dg00x, 1, 1, true);
171
172	return err;
173}
174