1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * Midi Sequencer interface routines for OPL2/OPL3/OPL4 FM
5 *
6 * OPL2/3 FM instrument loader:
7 * alsa-tools/seq/sbiload/
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 *
23 */
24
25 #include "opl3_voice.h"
26 #include <linux/init.h>
27 #include <linux/moduleparam.h>
28 #include <sound/initval.h>
29
30 MODULE_AUTHOR("Uros Bizjak <uros@kss-loka.si>");
31 MODULE_LICENSE("GPL");
32 MODULE_DESCRIPTION("ALSA driver for OPL3 FM synth");
33
34 int use_internal_drums = 0;
35 module_param(use_internal_drums, bool, 0444);
36 MODULE_PARM_DESC(use_internal_drums, "Enable internal OPL2/3 drums.");
37
38 int snd_opl3_synth_use_inc(struct snd_opl3 * opl3)
39 {
40 if (!try_module_get(opl3->card->module))
41 return -EFAULT;
42 return 0;
43
44 }
45
46 void snd_opl3_synth_use_dec(struct snd_opl3 * opl3)
47 {
48 module_put(opl3->card->module);
49 }
50
51 int snd_opl3_synth_setup(struct snd_opl3 * opl3)
52 {
53 int idx;
54 struct snd_hwdep *hwdep = opl3->hwdep;
55
56 mutex_lock(&hwdep->open_mutex);
57 if (hwdep->used) {
58 mutex_unlock(&hwdep->open_mutex);
59 return -EBUSY;
60 }
61 hwdep->used++;
62 mutex_unlock(&hwdep->open_mutex);
63
64 snd_opl3_reset(opl3);
65
66 for (idx = 0; idx < MAX_OPL3_VOICES; idx++) {
67 opl3->voices[idx].state = SNDRV_OPL3_ST_OFF;
68 opl3->voices[idx].time = 0;
69 opl3->voices[idx].keyon_reg = 0x00;
70 }
71 opl3->use_time = 0;
72 opl3->connection_reg = 0x00;
73 if (opl3->hardware >= OPL3_HW_OPL3) {
74 /* Clear 4-op connections */
75 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT,
76 opl3->connection_reg);
77 opl3->max_voices = MAX_OPL3_VOICES;
78 }
79 return 0;
80 }
81
82 void snd_opl3_synth_cleanup(struct snd_opl3 * opl3)
83 {
84 unsigned long flags;
85 struct snd_hwdep *hwdep;
86
87 /* Stop system timer */
88 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
89 if (opl3->sys_timer_status) {
90 del_timer(&opl3->tlist);
91 opl3->sys_timer_status = 0;
92 }
93 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
94
95 snd_opl3_reset(opl3);
96 hwdep = opl3->hwdep;
97 mutex_lock(&hwdep->open_mutex);
98 hwdep->used--;
99 mutex_unlock(&hwdep->open_mutex);
100 wake_up(&hwdep->open_wait);
101 }
102
103 static int snd_opl3_synth_use(void *private_data, struct snd_seq_port_subscribe * info)
104 {
105 struct snd_opl3 *opl3 = private_data;
106 int err;
107
108 if ((err = snd_opl3_synth_setup(opl3)) < 0)
109 return err;
110
111 if (use_internal_drums) {
112 /* Percussion mode */
113 opl3->voices[6].state = opl3->voices[7].state =
114 opl3->voices[8].state = SNDRV_OPL3_ST_NOT_AVAIL;
115 snd_opl3_load_drums(opl3);
116 opl3->drum_reg = OPL3_PERCUSSION_ENABLE;
117 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, opl3->drum_reg);
118 } else {
119 opl3->drum_reg = 0x00;
120 }
121
122 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM) {
123 if ((err = snd_opl3_synth_use_inc(opl3)) < 0)
124 return err;
125 }
126 opl3->synth_mode = SNDRV_OPL3_MODE_SEQ;
127 return 0;
128 }
129
130 static int snd_opl3_synth_unuse(void *private_data, struct snd_seq_port_subscribe * info)
131 {
132 struct snd_opl3 *opl3 = private_data;
133
134 snd_opl3_synth_cleanup(opl3);
135
136 if (info->sender.client != SNDRV_SEQ_CLIENT_SYSTEM)
137 snd_opl3_synth_use_dec(opl3);
138 return 0;
139 }
140
141 /*
142 * MIDI emulation operators
143 */
144 struct snd_midi_op opl3_ops = {
145 .note_on = snd_opl3_note_on,
146 .note_off = snd_opl3_note_off,
147 .key_press = snd_opl3_key_press,
148 .note_terminate = snd_opl3_terminate_note,
149 .control = snd_opl3_control,
150 .nrpn = snd_opl3_nrpn,
151 .sysex = snd_opl3_sysex,
152 };
153
154 static int snd_opl3_synth_event_input(struct snd_seq_event * ev, int direct,
155 void *private_data, int atomic, int hop)
156 {
157 struct snd_opl3 *opl3 = private_data;
158
159 snd_midi_process_event(&opl3_ops, ev, opl3->chset);
160 return 0;
161 }
162
163 /* ------------------------------ */
164
165 static void snd_opl3_synth_free_port(void *private_data)
166 {
167 struct snd_opl3 *opl3 = private_data;
168
169 snd_midi_channel_free_set(opl3->chset);
170 }
171
172 static int snd_opl3_synth_create_port(struct snd_opl3 * opl3)
173 {
174 struct snd_seq_port_callback callbacks;
175 char name[32];
176 int voices, opl_ver;
177
178 voices = (opl3->hardware < OPL3_HW_OPL3) ?
179 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
180 opl3->chset = snd_midi_channel_alloc_set(16);
181 if (opl3->chset == NULL)
182 return -ENOMEM;
183 opl3->chset->private_data = opl3;
184
185 memset(&callbacks, 0, sizeof(callbacks));
186 callbacks.owner = THIS_MODULE;
187 callbacks.use = snd_opl3_synth_use;
188 callbacks.unuse = snd_opl3_synth_unuse;
189 callbacks.event_input = snd_opl3_synth_event_input;
190 callbacks.private_free = snd_opl3_synth_free_port;
191 callbacks.private_data = opl3;
192
193 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
194 sprintf(name, "OPL%i FM Port", opl_ver);
195
196 opl3->chset->client = opl3->seq_client;
197 opl3->chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
198 SNDRV_SEQ_PORT_CAP_WRITE |
199 SNDRV_SEQ_PORT_CAP_SUBS_WRITE,
200 SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
201 SNDRV_SEQ_PORT_TYPE_MIDI_GM |
202 SNDRV_SEQ_PORT_TYPE_DIRECT_SAMPLE |
203 SNDRV_SEQ_PORT_TYPE_HARDWARE |
204 SNDRV_SEQ_PORT_TYPE_SYNTHESIZER,
205 16, voices,
206 name);
207 if (opl3->chset->port < 0) {
208 int port;
209 port = opl3->chset->port;
210 snd_midi_channel_free_set(opl3->chset);
211 return port;
212 }
213 return 0;
214 }
215
216 /* ------------------------------ */
217
218 static int snd_opl3_seq_new_device(struct snd_seq_device *dev)
219 {
220 struct snd_opl3 *opl3;
221 int client, err;
222 char name[32];
223 int opl_ver;
224
225 opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
226 if (opl3 == NULL)
227 return -EINVAL;
228
229 spin_lock_init(&opl3->voice_lock);
230
231 opl3->seq_client = -1;
232
233 /* allocate new client */
234 opl_ver = (opl3->hardware & OPL3_HW_MASK) >> 8;
235 sprintf(name, "OPL%i FM synth", opl_ver);
236 client = opl3->seq_client =
237 snd_seq_create_kernel_client(opl3->card, opl3->seq_dev_num,
238 name);
239 if (client < 0)
240 return client;
241
242 if ((err = snd_opl3_synth_create_port(opl3)) < 0) {
243 snd_seq_delete_kernel_client(client);
244 opl3->seq_client = -1;
245 return err;
246 }
247
248 /* setup system timer */
249 init_timer(&opl3->tlist);
250 opl3->tlist.function = snd_opl3_timer_func;
251 opl3->tlist.data = (unsigned long) opl3;
252 spin_lock_init(&opl3->sys_timer_lock);
253 opl3->sys_timer_status = 0;
254
255 #ifdef CONFIG_SND_SEQUENCER_OSS
256 snd_opl3_init_seq_oss(opl3, name);
257 #endif
258 return 0;
259 }
260
261 static int snd_opl3_seq_delete_device(struct snd_seq_device *dev)
262 {
263 struct snd_opl3 *opl3;
264
265 opl3 = *(struct snd_opl3 **)SNDRV_SEQ_DEVICE_ARGPTR(dev);
266 if (opl3 == NULL)
267 return -EINVAL;
268
269 #ifdef CONFIG_SND_SEQUENCER_OSS
270 snd_opl3_free_seq_oss(opl3);
271 #endif
272 if (opl3->seq_client >= 0) {
273 snd_seq_delete_kernel_client(opl3->seq_client);
274 opl3->seq_client = -1;
275 }
276 return 0;
277 }
278
279 static int __init alsa_opl3_seq_init(void)
280 {
281 static struct snd_seq_dev_ops ops =
282 {
283 snd_opl3_seq_new_device,
284 snd_opl3_seq_delete_device
285 };
286
287 return snd_seq_device_register_driver(SNDRV_SEQ_DEV_ID_OPL3, &ops,
288 sizeof(struct snd_opl3 *));
289 }
290
291 static void __exit alsa_opl3_seq_exit(void)
292 {
293 snd_seq_device_unregister_driver(SNDRV_SEQ_DEV_ID_OPL3);
294 }
295
296 module_init(alsa_opl3_seq_init)
297 module_exit(alsa_opl3_seq_exit)
298
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