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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/*
* OPL4 sequencer functions
*
* Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* Alternatively, this software may be distributed and/or modified 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 SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "opl4_local.h"
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <sound/initval.h>
MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
MODULE_DESCRIPTION("OPL4 wavetable synth driver");
MODULE_LICENSE("Dual BSD/GPL");
int volume_boost = 8;
module_param(volume_boost, int, 0644);
MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");
static int snd_opl4_seq_use_inc(opl4_t *opl4)
{
if (!try_module_get(opl4->card->module))
return -EFAULT;
return 0;
}
static void snd_opl4_seq_use_dec(opl4_t *opl4)
{
module_put(opl4->card->module);
}
static int snd_opl4_seq_use(void *private_data, snd_seq_port_subscribe_t *info)
{
opl4_t *opl4 = private_data;
int err;
down(&opl4->access_mutex);
if (opl4->used) {
up(&opl4->access_mutex);
return -EBUSY;
}
opl4->used++;
if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
err = snd_opl4_seq_use_inc(opl4);
if (err < 0) {
up(&opl4->access_mutex);
return err;
}
}
up(&opl4->access_mutex);
snd_opl4_synth_reset(opl4);
return 0;
}
static int snd_opl4_seq_unuse(void *private_data, snd_seq_port_subscribe_t *info)
{
opl4_t *opl4 = private_data;
snd_opl4_synth_shutdown(opl4);
down(&opl4->access_mutex);
opl4->used--;
up(&opl4->access_mutex);
if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
snd_opl4_seq_use_dec(opl4);
return 0;
}
static snd_midi_op_t opl4_ops = {
.note_on = snd_opl4_note_on,
.note_off = snd_opl4_note_off,
.note_terminate = snd_opl4_terminate_note,
.control = snd_opl4_control,
.sysex = snd_opl4_sysex,
};
static int snd_opl4_seq_event_input(snd_seq_event_t *ev, int direct,
void *private_data, int atomic, int hop)
{
opl4_t *opl4 = private_data;
snd_midi_process_event(&opl4_ops, ev, opl4->chset);
return 0;
}
static void snd_opl4_seq_free_port(void *private_data)
{
opl4_t *opl4 = private_data;
snd_midi_channel_free_set(opl4->chset);
}
static int snd_opl4_seq_new_device(snd_seq_device_t *dev)
{
opl4_t *opl4;
int client;
snd_seq_client_callback_t callbacks;
snd_seq_client_info_t cinfo;
snd_seq_port_callback_t pcallbacks;
opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
if (!opl4)
return -EINVAL;
if (snd_yrw801_detect(opl4) < 0)
return -ENODEV;
opl4->chset = snd_midi_channel_alloc_set(16);
if (!opl4->chset)
return -ENOMEM;
opl4->chset->private_data = opl4;
/* allocate new client */
memset(&callbacks, 0, sizeof(callbacks));
callbacks.private_data = opl4;
callbacks.allow_output = callbacks.allow_input = 1;
client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num, &callbacks);
if (client < 0) {
snd_midi_channel_free_set(opl4->chset);
return client;
}
opl4->seq_client = client;
opl4->chset->client = client;
/* change name of client */
memset(&cinfo, 0, sizeof(cinfo));
cinfo.client = client;
cinfo.type = KERNEL_CLIENT;
strcpy(cinfo.name, "OPL4 Wavetable");
snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
/* create new port */
memset(&pcallbacks, 0, sizeof(pcallbacks));
pcallbacks.owner = THIS_MODULE;
pcallbacks.use = snd_opl4_seq_use;
pcallbacks.unuse = snd_opl4_seq_unuse;
pcallbacks.event_input = snd_opl4_seq_event_input;
pcallbacks.private_free = snd_opl4_seq_free_port;
pcallbacks.private_data = opl4;
opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,
SNDRV_SEQ_PORT_CAP_WRITE |
SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
SNDRV_SEQ_PORT_TYPE_MIDI_GM,
16, 24,
"OPL4 Wavetable Port");
if (opl4->chset->port < 0) {
int err = opl4->chset->port;
snd_midi_channel_free_set(opl4->chset);
snd_seq_delete_kernel_client(client);
opl4->seq_client = -1;
return err;
}
return 0;
}
static int snd_opl4_seq_delete_device(snd_seq_device_t *dev)
{
opl4_t *opl4;
opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
if (!opl4)
return -EINVAL;
if (opl4->seq_client >= 0) {
snd_seq_delete_kernel_client(opl4->seq_client);
opl4->seq_client = -1;
}
return 0;
}
static int __init alsa_opl4_synth_init(void)
{
static snd_seq_dev_ops_t ops = {
snd_opl4_seq_new_device,
snd_opl4_seq_delete_device
};
return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
sizeof(opl4_t*));
}
static void __exit alsa_opl4_synth_exit(void)
{
snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
}
module_init(alsa_opl4_synth_init)
module_exit(alsa_opl4_synth_exit)
|
