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 <linux/module.h> |
38 | #include <sound/initval.h> |
39 | |
40 | MODULE_AUTHOR("Clemens Ladisch <clemens@ladisch.de>" ); |
41 | MODULE_DESCRIPTION("OPL4 wavetable synth driver" ); |
42 | MODULE_LICENSE("Dual BSD/GPL" ); |
43 | |
44 | int volume_boost = 8; |
45 | |
46 | module_param(volume_boost, int, 0644); |
47 | MODULE_PARM_DESC(volume_boost, "Additional volume for OPL4 wavetable sounds." ); |
48 | |
49 | static int snd_opl4_seq_use_inc(struct snd_opl4 *opl4) |
50 | { |
51 | if (!try_module_get(module: opl4->card->module)) |
52 | return -EFAULT; |
53 | return 0; |
54 | } |
55 | |
56 | static void snd_opl4_seq_use_dec(struct snd_opl4 *opl4) |
57 | { |
58 | module_put(module: opl4->card->module); |
59 | } |
60 | |
61 | static int snd_opl4_seq_use(void *private_data, struct snd_seq_port_subscribe *info) |
62 | { |
63 | struct snd_opl4 *opl4 = private_data; |
64 | int err; |
65 | |
66 | mutex_lock(&opl4->access_mutex); |
67 | |
68 | if (opl4->used) { |
69 | mutex_unlock(lock: &opl4->access_mutex); |
70 | return -EBUSY; |
71 | } |
72 | opl4->used++; |
73 | |
74 | if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) { |
75 | err = snd_opl4_seq_use_inc(opl4); |
76 | if (err < 0) { |
77 | mutex_unlock(lock: &opl4->access_mutex); |
78 | return err; |
79 | } |
80 | } |
81 | |
82 | mutex_unlock(lock: &opl4->access_mutex); |
83 | |
84 | snd_opl4_synth_reset(opl4); |
85 | return 0; |
86 | } |
87 | |
88 | static int snd_opl4_seq_unuse(void *private_data, struct snd_seq_port_subscribe *info) |
89 | { |
90 | struct snd_opl4 *opl4 = private_data; |
91 | |
92 | snd_opl4_synth_shutdown(opl4); |
93 | |
94 | mutex_lock(&opl4->access_mutex); |
95 | opl4->used--; |
96 | mutex_unlock(lock: &opl4->access_mutex); |
97 | |
98 | if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) |
99 | snd_opl4_seq_use_dec(opl4); |
100 | return 0; |
101 | } |
102 | |
103 | static const struct snd_midi_op 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, |
109 | }; |
110 | |
111 | static int snd_opl4_seq_event_input(struct snd_seq_event *ev, int direct, |
112 | void *private_data, int atomic, int hop) |
113 | { |
114 | struct snd_opl4 *opl4 = private_data; |
115 | |
116 | snd_midi_process_event(ops: &opl4_ops, ev, chanset: opl4->chset); |
117 | return 0; |
118 | } |
119 | |
120 | static void snd_opl4_seq_free_port(void *private_data) |
121 | { |
122 | struct snd_opl4 *opl4 = private_data; |
123 | |
124 | snd_midi_channel_free_set(chset: opl4->chset); |
125 | } |
126 | |
127 | static int snd_opl4_seq_probe(struct device *_dev) |
128 | { |
129 | struct snd_seq_device *dev = to_seq_dev(_dev); |
130 | struct snd_opl4 *opl4; |
131 | int client; |
132 | struct snd_seq_port_callback pcallbacks; |
133 | |
134 | opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
135 | if (!opl4) |
136 | return -EINVAL; |
137 | |
138 | if (snd_yrw801_detect(opl4) < 0) |
139 | return -ENODEV; |
140 | |
141 | opl4->chset = snd_midi_channel_alloc_set(n: 16); |
142 | if (!opl4->chset) |
143 | return -ENOMEM; |
144 | opl4->chset->private_data = opl4; |
145 | |
146 | /* allocate new client */ |
147 | client = snd_seq_create_kernel_client(card: opl4->card, client_index: opl4->seq_dev_num, |
148 | name_fmt: "OPL4 Wavetable" ); |
149 | if (client < 0) { |
150 | snd_midi_channel_free_set(chset: opl4->chset); |
151 | return client; |
152 | } |
153 | opl4->seq_client = client; |
154 | opl4->chset->client = client; |
155 | |
156 | /* create new port */ |
157 | memset(&pcallbacks, 0, sizeof(pcallbacks)); |
158 | pcallbacks.owner = THIS_MODULE; |
159 | pcallbacks.use = snd_opl4_seq_use; |
160 | pcallbacks.unuse = snd_opl4_seq_unuse; |
161 | pcallbacks.event_input = snd_opl4_seq_event_input; |
162 | pcallbacks.private_free = snd_opl4_seq_free_port; |
163 | pcallbacks.private_data = opl4; |
164 | |
165 | opl4->chset->port = snd_seq_event_port_attach(client, pcbp: &pcallbacks, |
166 | SNDRV_SEQ_PORT_CAP_WRITE | |
167 | SNDRV_SEQ_PORT_CAP_SUBS_WRITE, |
168 | SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC | |
169 | SNDRV_SEQ_PORT_TYPE_MIDI_GM | |
170 | SNDRV_SEQ_PORT_TYPE_HARDWARE | |
171 | SNDRV_SEQ_PORT_TYPE_SYNTHESIZER, |
172 | midi_channels: 16, midi_voices: 24, |
173 | portname: "OPL4 Wavetable Port" ); |
174 | if (opl4->chset->port < 0) { |
175 | int err = opl4->chset->port; |
176 | snd_midi_channel_free_set(chset: opl4->chset); |
177 | snd_seq_delete_kernel_client(client); |
178 | opl4->seq_client = -1; |
179 | return err; |
180 | } |
181 | return 0; |
182 | } |
183 | |
184 | static int snd_opl4_seq_remove(struct device *_dev) |
185 | { |
186 | struct snd_seq_device *dev = to_seq_dev(_dev); |
187 | struct snd_opl4 *opl4; |
188 | |
189 | opl4 = *(struct snd_opl4 **)SNDRV_SEQ_DEVICE_ARGPTR(dev); |
190 | if (!opl4) |
191 | return -EINVAL; |
192 | |
193 | if (opl4->seq_client >= 0) { |
194 | snd_seq_delete_kernel_client(client: opl4->seq_client); |
195 | opl4->seq_client = -1; |
196 | } |
197 | return 0; |
198 | } |
199 | |
200 | static struct snd_seq_driver opl4_seq_driver = { |
201 | .driver = { |
202 | .name = KBUILD_MODNAME, |
203 | .probe = snd_opl4_seq_probe, |
204 | .remove = snd_opl4_seq_remove, |
205 | }, |
206 | .id = SNDRV_SEQ_DEV_ID_OPL4, |
207 | .argsize = sizeof(struct snd_opl4 *), |
208 | }; |
209 | |
210 | module_snd_seq_driver(opl4_seq_driver); |
211 | |