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
midi_open(struct snd_rawmidi_substream * substream)10 static 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
midi_close(struct snd_rawmidi_substream * substream)34 static 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
midi_capture_trigger(struct snd_rawmidi_substream * substream,int up)47 static 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
midi_playback_trigger(struct snd_rawmidi_substream * substream,int up)69 static 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
set_substream_names(struct snd_dg00x * dg00x,struct snd_rawmidi * rmidi,bool is_console)91 static 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 snprintf(subs->name, sizeof(subs->name),
104 "%s MIDI %d",
105 dg00x->card->shortname,
106 subs->number + 1);
107 } else {
108 snprintf(subs->name, sizeof(subs->name),
109 "%s control",
110 dg00x->card->shortname);
111 }
112 }
113 }
114 }
115
add_substream_pair(struct snd_dg00x * dg00x,unsigned int out_ports,unsigned int in_ports,bool is_console)116 static 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
snd_dg00x_create_midi_devices(struct snd_dg00x * dg00x)159 int 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