[ALSA] seq: remove struct snd_seq_client_callback
[linux-2.6.git] / sound / drivers / opl4 / opl4_seq.c
1 /*
2  * OPL4 sequencer functions
3  *
4  * Copyright (c) 2003 by Clemens Ladisch <clemens@ladisch.de>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
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.
15  *
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
19  * version.
20  *
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
31  * SUCH DAMAGE.
32  */
33
34 #include "opl4_local.h"
35 #include <linux/init.h>
36 #include <linux/moduleparam.h>
37 #include <sound/initval.h>
38
39 MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>");
40 MODULE_DESCRIPTION("OPL4 wavetable synth driver");
41 MODULE_LICENSE("Dual BSD/GPL");
42
43 int volume_boost = 8;
44
45 module_param(volume_boost, int, 0644);
46 MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds.");
47
48 static int snd_opl4_seq_use_inc(struct snd_opl4 *opl4)
49 {
50         if (!try_module_get(opl4->card->module))
51                 return -EFAULT;
52         return 0;
53 }
54
55 static void snd_opl4_seq_use_dec(struct snd_opl4 *opl4)
56 {
57         module_put(opl4->card->module);
58 }
59
60 static int snd_opl4_seq_use(void *private_data, struct snd_seq_port_subscribe *info)
61 {
62         struct snd_opl4 *opl4 = private_data;
63         int err;
64
65         down(&opl4->access_mutex);
66
67         if (opl4->used) {
68                 up(&opl4->access_mutex);
69                 return -EBUSY;
70         }
71         opl4->used++;
72
73         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
74                 err = snd_opl4_seq_use_inc(opl4);
75                 if (err < 0) {
76                         up(&opl4->access_mutex);
77                         return err;
78                 }
79         }
80
81         up(&opl4->access_mutex);
82
83         snd_opl4_synth_reset(opl4);
84         return 0;
85 }
86
87 static int snd_opl4_seq_unuse(void *private_data, struct snd_seq_port_subscribe *info)
88 {
89         struct snd_opl4 *opl4 = private_data;
90
91         snd_opl4_synth_shutdown(opl4);
92
93         down(&opl4->access_mutex);
94         opl4->used--;
95         up(&opl4->access_mutex);
96
97         if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
98                 snd_opl4_seq_use_dec(opl4);
99         return 0;
100 }
101
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,
108 };
109
110 static int snd_opl4_seq_event_input(struct snd_seq_event *ev, int direct,
111                                     void *private_data, int atomic, int hop)
112 {
113         struct snd_opl4 *opl4 = private_data;
114
115         snd_midi_process_event(&opl4_ops, ev, opl4->chset);
116         return 0;
117 }
118
119 static void snd_opl4_seq_free_port(void *private_data)
120 {
121         struct snd_opl4 *opl4 = private_data;
122
123         snd_midi_channel_free_set(opl4->chset);
124 }
125
126 static int snd_opl4_seq_new_device(struct snd_seq_device *dev)
127 {
128         struct snd_opl4 *opl4;
129         int client;
130         struct snd_seq_client_info cinfo;
131         struct snd_seq_port_callback pcallbacks;
132
133         opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
134         if (!opl4)
135                 return -EINVAL;
136
137         if (snd_yrw801_detect(opl4) < 0)
138                 return -ENODEV;
139
140         opl4->chset = snd_midi_channel_alloc_set(16);
141         if (!opl4->chset)
142                 return -ENOMEM;
143         opl4->chset->private_data = opl4;
144
145         /* allocate new client */
146         client = snd_seq_create_kernel_client(opl4->card, opl4->seq_dev_num);
147         if (client < 0) {
148                 snd_midi_channel_free_set(opl4->chset);
149                 return client;
150         }
151         opl4->seq_client = client;
152         opl4->chset->client = client;
153
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);
160
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;
169
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,
175                                                       16, 24,
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;
182                 return err;
183         }
184         return 0;
185 }
186
187 static int snd_opl4_seq_delete_device(struct snd_seq_device *dev)
188 {
189         struct snd_opl4 *opl4;
190
191         opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
192         if (!opl4)
193                 return -EINVAL;
194
195         if (opl4->seq_client >= 0) {
196                 snd_seq_delete_kernel_client(opl4->seq_client);
197                 opl4->seq_client = -1;
198         }
199         return 0;
200 }
201
202 static int __init alsa_opl4_synth_init(void)
203 {
204         static struct snd_seq_dev_ops ops = {
205                 snd_opl4_seq_new_device,
206                 snd_opl4_seq_delete_device
207         };
208
209         return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL4, &ops,
210                                               sizeof(struct snd_opl4 *));
211 }
212
213 static void __exit alsa_opl4_synth_exit(void)
214 {
215         snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL4);
216 }
217
218 module_init(alsa_opl4_synth_init)
219 module_exit(alsa_opl4_synth_exit)