1 /*
2 * dice_midi.c - a part of driver for Dice based devices
3 *
4 * Copyright (c) 2014 Takashi Sakamoto
5 *
6 * Licensed under the terms of the GNU General Public License, version 2.
7 */
8 #include "dice.h"
9
midi_open(struct snd_rawmidi_substream * substream)10 static int midi_open(struct snd_rawmidi_substream *substream)
11 {
12 struct snd_dice *dice = substream->rmidi->private_data;
13 int err;
14
15 err = snd_dice_stream_lock_try(dice);
16 if (err < 0)
17 return err;
18
19 mutex_lock(&dice->mutex);
20
21 dice->substreams_counter++;
22 err = snd_dice_stream_start_duplex(dice, 0);
23
24 mutex_unlock(&dice->mutex);
25
26 if (err < 0)
27 snd_dice_stream_lock_release(dice);
28
29 return err;
30 }
31
midi_close(struct snd_rawmidi_substream * substream)32 static int midi_close(struct snd_rawmidi_substream *substream)
33 {
34 struct snd_dice *dice = substream->rmidi->private_data;
35
36 mutex_lock(&dice->mutex);
37
38 dice->substreams_counter--;
39 snd_dice_stream_stop_duplex(dice);
40
41 mutex_unlock(&dice->mutex);
42
43 snd_dice_stream_lock_release(dice);
44 return 0;
45 }
46
midi_capture_trigger(struct snd_rawmidi_substream * substrm,int up)47 static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
48 {
49 struct snd_dice *dice = substrm->rmidi->private_data;
50 unsigned long flags;
51
52 spin_lock_irqsave(&dice->lock, flags);
53
54 if (up)
55 amdtp_am824_midi_trigger(&dice->tx_stream[0],
56 substrm->number, substrm);
57 else
58 amdtp_am824_midi_trigger(&dice->tx_stream[0],
59 substrm->number, NULL);
60
61 spin_unlock_irqrestore(&dice->lock, flags);
62 }
63
midi_playback_trigger(struct snd_rawmidi_substream * substrm,int up)64 static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
65 {
66 struct snd_dice *dice = substrm->rmidi->private_data;
67 unsigned long flags;
68
69 spin_lock_irqsave(&dice->lock, flags);
70
71 if (up)
72 amdtp_am824_midi_trigger(&dice->rx_stream[0],
73 substrm->number, substrm);
74 else
75 amdtp_am824_midi_trigger(&dice->rx_stream[0],
76 substrm->number, NULL);
77
78 spin_unlock_irqrestore(&dice->lock, flags);
79 }
80
set_midi_substream_names(struct snd_dice * dice,struct snd_rawmidi_str * str)81 static void set_midi_substream_names(struct snd_dice *dice,
82 struct snd_rawmidi_str *str)
83 {
84 struct snd_rawmidi_substream *subs;
85
86 list_for_each_entry(subs, &str->substreams, list) {
87 snprintf(subs->name, sizeof(subs->name),
88 "%s MIDI %d", dice->card->shortname, subs->number + 1);
89 }
90 }
91
snd_dice_create_midi(struct snd_dice * dice)92 int snd_dice_create_midi(struct snd_dice *dice)
93 {
94 static const struct snd_rawmidi_ops capture_ops = {
95 .open = midi_open,
96 .close = midi_close,
97 .trigger = midi_capture_trigger,
98 };
99 static const struct snd_rawmidi_ops playback_ops = {
100 .open = midi_open,
101 .close = midi_close,
102 .trigger = midi_playback_trigger,
103 };
104 struct snd_rawmidi *rmidi;
105 struct snd_rawmidi_str *str;
106 unsigned int midi_in_ports, midi_out_ports;
107 int i;
108 int err;
109
110 midi_in_ports = 0;
111 midi_out_ports = 0;
112 for (i = 0; i < MAX_STREAMS; ++i) {
113 midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]);
114 midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]);
115 }
116
117 if (midi_in_ports + midi_out_ports == 0)
118 return 0;
119
120 /* create midi ports */
121 err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
122 midi_out_ports, midi_in_ports,
123 &rmidi);
124 if (err < 0)
125 return err;
126
127 snprintf(rmidi->name, sizeof(rmidi->name),
128 "%s MIDI", dice->card->shortname);
129 rmidi->private_data = dice;
130
131 if (midi_in_ports > 0) {
132 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
133
134 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
135 &capture_ops);
136
137 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
138
139 set_midi_substream_names(dice, str);
140 }
141
142 if (midi_out_ports > 0) {
143 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
144
145 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
146 &playback_ops);
147
148 str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
149
150 set_midi_substream_names(dice, str);
151 }
152
153 if ((midi_out_ports > 0) && (midi_in_ports > 0))
154 rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
155
156 return 0;
157 }
158
