1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* dice_midi.c - a part of driver for Dice based devices
*
* Copyright (c) 2014 Takashi Sakamoto
*/
#include "dice.h"
static int midi_open(struct snd_rawmidi_substream *substream)
{
struct snd_dice *dice = substream->rmidi->private_data;
int err;
err = snd_dice_stream_lock_try(dice);
if (err < 0)
return err;
mutex_lock(&dice->mutex);
err = snd_dice_stream_reserve_duplex(dice, 0);
if (err >= 0) {
++dice->substreams_counter;
err = snd_dice_stream_start_duplex(dice);
if (err < 0)
--dice->substreams_counter;
}
mutex_unlock(&dice->mutex);
if (err < 0)
snd_dice_stream_lock_release(dice);
return err;
}
static int midi_close(struct snd_rawmidi_substream *substream)
{
struct snd_dice *dice = substream->rmidi->private_data;
mutex_lock(&dice->mutex);
--dice->substreams_counter;
snd_dice_stream_stop_duplex(dice);
mutex_unlock(&dice->mutex);
snd_dice_stream_lock_release(dice);
return 0;
}
static void midi_capture_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_dice *dice = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&dice->lock, flags);
if (up)
amdtp_am824_midi_trigger(&dice->tx_stream[0],
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&dice->tx_stream[0],
substrm->number, NULL);
spin_unlock_irqrestore(&dice->lock, flags);
}
static void midi_playback_trigger(struct snd_rawmidi_substream *substrm, int up)
{
struct snd_dice *dice = substrm->rmidi->private_data;
unsigned long flags;
spin_lock_irqsave(&dice->lock, flags);
if (up)
amdtp_am824_midi_trigger(&dice->rx_stream[0],
substrm->number, substrm);
else
amdtp_am824_midi_trigger(&dice->rx_stream[0],
substrm->number, NULL);
spin_unlock_irqrestore(&dice->lock, flags);
}
static void set_midi_substream_names(struct snd_dice *dice,
struct snd_rawmidi_str *str)
{
struct snd_rawmidi_substream *subs;
list_for_each_entry(subs, &str->substreams, list) {
snprintf(subs->name, sizeof(subs->name),
"%s MIDI %d", dice->card->shortname, subs->number + 1);
}
}
int snd_dice_create_midi(struct snd_dice *dice)
{
static const struct snd_rawmidi_ops capture_ops = {
.open = midi_open,
.close = midi_close,
.trigger = midi_capture_trigger,
};
static const struct snd_rawmidi_ops playback_ops = {
.open = midi_open,
.close = midi_close,
.trigger = midi_playback_trigger,
};
struct snd_rawmidi *rmidi;
struct snd_rawmidi_str *str;
unsigned int midi_in_ports, midi_out_ports;
int i;
int err;
midi_in_ports = 0;
midi_out_ports = 0;
for (i = 0; i < MAX_STREAMS; ++i) {
midi_in_ports = max(midi_in_ports, dice->tx_midi_ports[i]);
midi_out_ports = max(midi_out_ports, dice->rx_midi_ports[i]);
}
if (midi_in_ports + midi_out_ports == 0)
return 0;
/* create midi ports */
err = snd_rawmidi_new(dice->card, dice->card->driver, 0,
midi_out_ports, midi_in_ports,
&rmidi);
if (err < 0)
return err;
snprintf(rmidi->name, sizeof(rmidi->name),
"%s MIDI", dice->card->shortname);
rmidi->private_data = dice;
if (midi_in_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&capture_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT];
set_midi_substream_names(dice, str);
}
if (midi_out_ports > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&playback_ops);
str = &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT];
set_midi_substream_names(dice, str);
}
if ((midi_out_ports > 0) && (midi_in_ports > 0))
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_DUPLEX;
return 0;
}
|
