2 * OPL4 sequencer functions
4 * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions, and the following disclaimer,
12 * without modification.
13 * 2. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * Alternatively, this software may be distributed and/or modified under the
17 * terms of the GNU General Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at your option) any later
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
25 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include "opl4_local.h"
35 #include <linux/init.h>
36 #include <linux/moduleparam.h>
37 #include <sound/initval.h>
39 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
40 MODULE_DESCRIPTION("OPL4 wavetable synth driver");
41 MODULE_LICENSE("Dual BSD/GPL");
45 module_param(volume_boost, int, 0644);
46 MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");
48 static int snd_opl4_seq_use_inc(struct snd_opl4 *opl4)
50 if (!try_module_get(opl4->card->module))
55 static void snd_opl4_seq_use_dec(struct snd_opl4 *opl4)
57 module_put(opl4->card->module);
60 static int snd_opl4_seq_use(void *private_data, struct snd_seq_port_subscribe *info)
62 struct snd_opl4 *opl4 = private_data;
65 down(&opl4->access_mutex);
68 up(&opl4->access_mutex);
73 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
74 err = snd_opl4_seq_use_inc(opl4);
76 up(&opl4->access_mutex);
81 up(&opl4->access_mutex);
83 snd_opl4_synth_reset(opl4);
87 static int snd_opl4_seq_unuse(void *private_data, struct snd_seq_port_subscribe *info)
89 struct snd_opl4 *opl4 = private_data;
91 snd_opl4_synth_shutdown(opl4);
93 down(&opl4->access_mutex);
95 up(&opl4->access_mutex);
97 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
98 snd_opl4_seq_use_dec(opl4);
102 static struct snd_midi_op opl4_ops = {
103 .note_on = snd_opl4_note_on,
104 .note_off = snd_opl4_note_off,
105 .note_terminate = snd_opl4_terminate_note,
106 .control = snd_opl4_control,
107 .sysex = snd_opl4_sysex,
110 static int snd_opl4_seq_event_input(struct snd_seq_event *ev, int direct,
111 void *private_data, int atomic, int hop)
113 struct snd_opl4 *opl4 = private_data;
115 snd_midi_process_event(&opl4_ops, ev, opl4->chset);
119 static void snd_opl4_seq_free_port(void *private_data)
121 struct snd_opl4 *opl4 = private_data;
123 snd_midi_channel_free_set(opl4->chset);
126 static int snd_opl4_seq_new_device(struct snd_seq_device *dev)
128 struct snd_opl4 *opl4;
130 struct snd_seq_client_info cinfo;
131 struct snd_seq_port_callback pcallbacks;
133 opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
137 if (snd_yrw801_detect(opl4) < 0)
140 opl4->chset = snd_midi_channel_alloc_set(16);
143 opl4->chset->private_data = opl4;
145 /* allocate new client */
146 client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num);
148 snd_midi_channel_free_set(opl4->chset);
151 opl4->seq_client = client;
152 opl4->chset->client = client;
154 /* change name of client */
155 memset(&cinfo, 0, sizeof(cinfo));
156 cinfo.client = client;
157 cinfo.type = KERNEL_CLIENT;
158 strcpy(cinfo.name, "OPL4 Wavetable");
159 snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
161 /* create new port */
162 memset(&pcallbacks, 0, sizeof(pcallbacks));
163 pcallbacks.owner = THIS_MODULE;
164 pcallbacks.use = snd_opl4_seq_use;
165 pcallbacks.unuse = snd_opl4_seq_unuse;
166 pcallbacks.event_input = snd_opl4_seq_event_input;
167 pcallbacks.private_free = snd_opl4_seq_free_port;
168 pcallbacks.private_data = opl4;
170 opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,
171 SNDRV_SEQ_PORT_CAP_WRITE |
172 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
173 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
174 SNDRV_SEQ_PORT_TYPE_MIDI_GM,
176 "OPL4 Wavetable Port");
177 if (opl4->chset->port < 0) {
178 int err = opl4->chset->port;
179 snd_midi_channel_free_set(opl4->chset);
180 snd_seq_delete_kernel_client(client);
181 opl4->seq_client = -1;
187 static int snd_opl4_seq_delete_device(struct snd_seq_device *dev)
189 struct snd_opl4 *opl4;
191 opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
195 if (opl4->seq_client >= 0) {
196 snd_seq_delete_kernel_client(opl4->seq_client);
197 opl4->seq_client = -1;
202 static int __init alsa_opl4_synth_init(void)
204 static struct snd_seq_dev_ops ops = {
205 snd_opl4_seq_new_device,
206 snd_opl4_seq_delete_device
209 return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
210 sizeof(struct snd_opl4 *));
213 static void __exit alsa_opl4_synth_exit(void)
215 snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
218 module_init(alsa_opl4_synth_init)
219 module_exit(alsa_opl4_synth_exit)