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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright (c) 2006,2007 Daniel Mack
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <linux/spinlock.h>
#include <sound/core.h>
#include <sound/rawmidi.h>
#include <sound/pcm.h>
#include "caiaq-device.h"
#include "caiaq-midi.h"
static int snd_usb_caiaq_midi_input_open(struct snd_rawmidi_substream *substream)
{
return 0;
}
static int snd_usb_caiaq_midi_input_close(struct snd_rawmidi_substream *substream)
{
return 0;
}
static void snd_usb_caiaq_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
if (!dev)
return;
dev->midi_receive_substream = up ? substream : NULL;
}
static int snd_usb_caiaq_midi_output_open(struct snd_rawmidi_substream *substream)
{
return 0;
}
static int snd_usb_caiaq_midi_output_close(struct snd_rawmidi_substream *substream)
{
struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
if (dev->midi_out_active) {
usb_kill_urb(&dev->midi_out_urb);
dev->midi_out_active = 0;
}
return 0;
}
static void snd_usb_caiaq_midi_send(struct snd_usb_caiaqdev *dev,
struct snd_rawmidi_substream *substream)
{
int len, ret;
dev->midi_out_buf[0] = EP1_CMD_MIDI_WRITE;
dev->midi_out_buf[1] = 0; /* port */
len = snd_rawmidi_transmit(substream, dev->midi_out_buf + 3,
EP1_BUFSIZE - 3);
if (len <= 0)
return;
dev->midi_out_buf[2] = len;
dev->midi_out_urb.transfer_buffer_length = len+3;
ret = usb_submit_urb(&dev->midi_out_urb, GFP_ATOMIC);
if (ret < 0)
log("snd_usb_caiaq_midi_send(%p): usb_submit_urb() failed,"
"ret=%d, len=%d\n",
substream, ret, len);
else
dev->midi_out_active = 1;
}
static void snd_usb_caiaq_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
{
struct snd_usb_caiaqdev *dev = substream->rmidi->private_data;
if (up) {
dev->midi_out_substream = substream;
if (!dev->midi_out_active)
snd_usb_caiaq_midi_send(dev, substream);
} else {
dev->midi_out_substream = NULL;
}
}
static struct snd_rawmidi_ops snd_usb_caiaq_midi_output =
{
.open = snd_usb_caiaq_midi_output_open,
.close = snd_usb_caiaq_midi_output_close,
.trigger = snd_usb_caiaq_midi_output_trigger,
};
static struct snd_rawmidi_ops snd_usb_caiaq_midi_input =
{
.open = snd_usb_caiaq_midi_input_open,
.close = snd_usb_caiaq_midi_input_close,
.trigger = snd_usb_caiaq_midi_input_trigger,
};
void snd_usb_caiaq_midi_handle_input(struct snd_usb_caiaqdev *dev,
int port, const char *buf, int len)
{
if (!dev->midi_receive_substream)
return;
snd_rawmidi_receive(dev->midi_receive_substream, buf, len);
}
int snd_usb_caiaq_midi_init(struct snd_usb_caiaqdev *device)
{
int ret;
struct snd_rawmidi *rmidi;
ret = snd_rawmidi_new(device->chip.card, device->product_name, 0,
device->spec.num_midi_out,
device->spec.num_midi_in,
&rmidi);
if (ret < 0)
return ret;
strcpy(rmidi->name, device->product_name);
rmidi->info_flags = SNDRV_RAWMIDI_INFO_DUPLEX;
rmidi->private_data = device;
if (device->spec.num_midi_out > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
&snd_usb_caiaq_midi_output);
}
if (device->spec.num_midi_in > 0) {
rmidi->info_flags |= SNDRV_RAWMIDI_INFO_INPUT;
snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
&snd_usb_caiaq_midi_input);
}
device->rmidi = rmidi;
return 0;
}
void snd_usb_caiaq_midi_output_done(struct urb* urb)
{
struct snd_usb_caiaqdev *dev = urb->context;
dev->midi_out_active = 0;
if (urb->status != 0)
return;
if (!dev->midi_out_substream)
return;
snd_usb_caiaq_midi_send(dev, dev->midi_out_substream);
}
|
