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 <sound/initval.h>
38 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
39 MODULE_DESCRIPTION("OPL4 wavetable synth driver");
40 MODULE_LICENSE("Dual BSD/GPL");
41 MODULE_CLASSES("{sound}");
45 MODULE_PARM(volume_boost, "i");
46 MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");
47 MODULE_PARM_SYNTAX(volume_boost, "default:8");
49 static int snd_opl4_seq_use_inc(opl4_t *opl4)
51 if (!try_module_get(opl4->card->module))
56 static void snd_opl4_seq_use_dec(opl4_t *opl4)
58 module_put(opl4->card->module);
61 static int snd_opl4_seq_use(void *private_data, snd_seq_port_subscribe_t *info)
63 opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return -ENXIO);
66 down(&opl4->access_mutex);
69 up(&opl4->access_mutex);
74 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
75 err = snd_opl4_seq_use_inc(opl4);
77 up(&opl4->access_mutex);
82 up(&opl4->access_mutex);
84 snd_opl4_synth_reset(opl4);
88 static int snd_opl4_seq_unuse(void *private_data, snd_seq_port_subscribe_t *info)
90 opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return -ENXIO);
92 snd_opl4_synth_shutdown(opl4);
94 down(&opl4->access_mutex);
96 up(&opl4->access_mutex);
98 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
99 snd_opl4_seq_use_dec(opl4);
103 static snd_midi_op_t opl4_ops = {
104 .note_on = snd_opl4_note_on,
105 .note_off = snd_opl4_note_off,
106 .note_terminate = snd_opl4_terminate_note,
107 .control = snd_opl4_control,
108 .sysex = snd_opl4_sysex,
111 static int snd_opl4_seq_event_input(snd_seq_event_t *ev, int direct,
112 void *private_data, int atomic, int hop)
114 opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return -ENXIO);
116 snd_midi_process_event(&opl4_ops, ev, opl4->chset);
120 static void snd_opl4_seq_free_port(void *private_data)
122 opl4_t *opl4 = snd_magic_cast(opl4_t, private_data, return);
124 snd_midi_channel_free_set(opl4->chset);
127 static int snd_opl4_seq_new_device(snd_seq_device_t *dev)
131 snd_seq_client_callback_t callbacks;
132 snd_seq_client_info_t cinfo;
133 snd_seq_port_callback_t pcallbacks;
135 opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
139 if (snd_yrw801_detect(opl4) < 0)
142 opl4->chset = snd_midi_channel_alloc_set(16);
145 opl4->chset->private_data = opl4;
147 /* allocate new client */
148 memset(&callbacks, 0, sizeof(callbacks));
149 callbacks.private_data = opl4;
150 callbacks.allow_output = callbacks.allow_input = 1;
151 client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num, &callbacks);
153 snd_midi_channel_free_set(opl4->chset);
156 opl4->seq_client = client;
157 opl4->chset->client = client;
159 /* change name of client */
160 memset(&cinfo, 0, sizeof(cinfo));
161 cinfo.client = client;
162 cinfo.type = KERNEL_CLIENT;
163 strcpy(cinfo.name, "OPL4 Wavetable");
164 snd_seq_kernel_client_ctl(client, SNDRV_SEQ_IOCTL_SET_CLIENT_INFO, &cinfo);
166 /* create new port */
167 memset(&pcallbacks, 0, sizeof(pcallbacks));
168 pcallbacks.owner = THIS_MODULE;
169 pcallbacks.use = snd_opl4_seq_use;
170 pcallbacks.unuse = snd_opl4_seq_unuse;
171 pcallbacks.event_input = snd_opl4_seq_event_input;
172 pcallbacks.private_free = snd_opl4_seq_free_port;
173 pcallbacks.private_data = opl4;
175 opl4->chset->port = snd_seq_event_port_attach(client, &pcallbacks,
176 SNDRV_SEQ_PORT_CAP_WRITE |
177 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
178 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
179 SNDRV_SEQ_PORT_TYPE_MIDI_GM,
181 "OPL4 Wavetable Port");
182 if (opl4->chset->port < 0) {
183 int err = opl4->chset->port;
184 snd_midi_channel_free_set(opl4->chset);
185 snd_seq_delete_kernel_client(client);
186 opl4->seq_client = -1;
192 static int snd_opl4_seq_delete_device(snd_seq_device_t *dev)
196 opl4 = *(opl4_t **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
200 if (opl4->seq_client >= 0) {
201 snd_seq_delete_kernel_client(opl4->seq_client);
202 opl4->seq_client = -1;
207 static int __init alsa_opl4_synth_init(void)
209 static snd_seq_dev_ops_t ops = {
210 snd_opl4_seq_new_device,
211 snd_opl4_seq_delete_device
214 return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
218 static void __exit alsa_opl4_synth_exit(void)
220 snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
223 module_init(alsa_opl4_synth_init)
224 module_exit(alsa_opl4_synth_exit)