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mm-only debug patch...
[mmotm.git] / sound / drivers / opl3 / opl3_synth.c
blob6d57b6441dec53312de691a6caeb835ae2ef607d
1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * Routines for OPL2/OPL3/OPL4 control
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 *
20 */
21
22 #include <sound/opl3.h>
23 #include <sound/asound_fm.h>
24
25 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
26 #define OPL3_SUPPORT_SYNTH
27 #endif
28
29 /*
30 * There is 18 possible 2 OP voices
31 * (9 in the left and 9 in the right).
32 * The first OP is the modulator and 2nd is the carrier.
33 *
34 * The first three voices in the both sides may be connected
35 * with another voice to a 4 OP voice. For example voice 0
36 * can be connected with voice 3. The operators of voice 3 are
37 * used as operators 3 and 4 of the new 4 OP voice.
38 * In this case the 2 OP voice number 0 is the 'first half' and
39 * voice 3 is the second.
40 */
41
42
43 /*
44 * Register offset table for OPL2/3 voices,
45 * OPL2 / one OPL3 register array side only
46 */
47
48 char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
49 {
50 /* OP1 OP2 OP3 OP4 */
51 /* ------------------------ */
52 { 0x00, 0x03, 0x08, 0x0b },
53 { 0x01, 0x04, 0x09, 0x0c },
54 { 0x02, 0x05, 0x0a, 0x0d },
55
56 { 0x08, 0x0b, 0x00, 0x00 },
57 { 0x09, 0x0c, 0x00, 0x00 },
58 { 0x0a, 0x0d, 0x00, 0x00 },
59
60 { 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */
61 { 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */
62 { 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */
63 };
64
65 EXPORT_SYMBOL(snd_opl3_regmap);
66
67 /*
68 * prototypes
69 */
70 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
71 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
72 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
73 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
74 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);
75
76 /* ------------------------------ */
77
78 /*
79 * open the device exclusively
80 */
81 int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
82 {
83 return 0;
84 }
85
86 /*
87 * ioctl for hwdep device:
88 */
89 int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
90 unsigned int cmd, unsigned long arg)
91 {
92 struct snd_opl3 *opl3 = hw->private_data;
93 void __user *argp = (void __user *)arg;
94
95 if (snd_BUG_ON(!opl3))
96 return -EINVAL;
97
98 switch (cmd) {
99 /* get information */
100 case SNDRV_DM_FM_IOCTL_INFO:
101 {
102 struct snd_dm_fm_info info;
103
104 info.fm_mode = opl3->fm_mode;
105 info.rhythm = opl3->rhythm;
106 if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
107 return -EFAULT;
108 return 0;
109 }
110
111 case SNDRV_DM_FM_IOCTL_RESET:
112 #ifdef CONFIG_SND_OSSEMUL
113 case SNDRV_DM_FM_OSS_IOCTL_RESET:
114 #endif
115 snd_opl3_reset(opl3);
116 return 0;
117
118 case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
119 #ifdef CONFIG_SND_OSSEMUL
120 case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
121 #endif
122 {
123 struct snd_dm_fm_note note;
124 if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
125 return -EFAULT;
126 return snd_opl3_play_note(opl3, &note);
127 }
128
129 case SNDRV_DM_FM_IOCTL_SET_VOICE:
130 #ifdef CONFIG_SND_OSSEMUL
131 case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
132 #endif
133 {
134 struct snd_dm_fm_voice voice;
135 if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
136 return -EFAULT;
137 return snd_opl3_set_voice(opl3, &voice);
138 }
139
140 case SNDRV_DM_FM_IOCTL_SET_PARAMS:
141 #ifdef CONFIG_SND_OSSEMUL
142 case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
143 #endif
144 {
145 struct snd_dm_fm_params params;
146 if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
147 return -EFAULT;
148 return snd_opl3_set_params(opl3, &params);
149 }
150
151 case SNDRV_DM_FM_IOCTL_SET_MODE:
152 #ifdef CONFIG_SND_OSSEMUL
153 case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
154 #endif
155 return snd_opl3_set_mode(opl3, (int) arg);
156
157 case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
158 #ifdef CONFIG_SND_OSSEMUL
159 case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
160 #endif
161 return snd_opl3_set_connection(opl3, (int) arg);
162
163 #ifdef OPL3_SUPPORT_SYNTH
164 case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
165 snd_opl3_clear_patches(opl3);
166 return 0;
167 #endif
168
169 #ifdef CONFIG_SND_DEBUG
170 default:
171 snd_printk(KERN_WARNING "unknown IOCTL: 0x%x\n", cmd);
172 #endif
173 }
174 return -ENOTTY;
175 }
176
177 /*
178 * close the device
179 */
180 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
181 {
182 struct snd_opl3 *opl3 = hw->private_data;
183
184 snd_opl3_reset(opl3);
185 return 0;
186 }
187
188 #ifdef OPL3_SUPPORT_SYNTH
189 /*
190 * write the device - load patches
191 */
192 long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
193 loff_t *offset)
194 {
195 struct snd_opl3 *opl3 = hw->private_data;
196 long result = 0;
197 int err = 0;
198 struct sbi_patch inst;
199
200 while (count >= sizeof(inst)) {
201 unsigned char type;
202 if (copy_from_user(&inst, buf, sizeof(inst)))
203 return -EFAULT;
204 if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
205 !memcmp(inst.key, FM_KEY_2OP, 4))
206 type = FM_PATCH_OPL2;
207 else if (!memcmp(inst.key, FM_KEY_4OP, 4))
208 type = FM_PATCH_OPL3;
209 else /* invalid type */
210 break;
211 err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
212 inst.name, inst.extension,
213 inst.data);
214 if (err < 0)
215 break;
216 result += sizeof(inst);
217 count -= sizeof(inst);
218 }
219 return result > 0 ? result : err;
220 }
221
222
223 /*
224 * Patch management
225 */
226
227 /* offsets for SBI params */
228 #define AM_VIB 0
229 #define KSL_LEVEL 2
230 #define ATTACK_DECAY 4
231 #define SUSTAIN_RELEASE 6
232 #define WAVE_SELECT 8
233
234 /* offset for SBI instrument */
235 #define CONNECTION 10
236 #define OFFSET_4OP 11
237
238 /*
239 * load a patch, obviously.
240 *
241 * loaded on the given program and bank numbers with the given type
242 * (FM_PATCH_OPLx).
243 * data is the pointer of SBI record _without_ header (key and name).
244 * name is the name string of the patch.
245 * ext is the extension data of 7 bytes long (stored in name of SBI
246 * data up to offset 25), or NULL to skip.
247 * return 0 if successful or a negative error code.
248 */
249 int snd_opl3_load_patch(struct snd_opl3 *opl3,
250 int prog, int bank, int type,
251 const char *name,
252 const unsigned char *ext,
253 const unsigned char *data)
254 {
255 struct fm_patch *patch;
256 int i;
257
258 patch = snd_opl3_find_patch(opl3, prog, bank, 1);
259 if (!patch)
260 return -ENOMEM;
261
262 patch->type = type;
263
264 for (i = 0; i < 2; i++) {
265 patch->inst.op[i].am_vib = data[AM_VIB + i];
266 patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
267 patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
268 patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
269 patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
270 }
271 patch->inst.feedback_connection[0] = data[CONNECTION];
272
273 if (type == FM_PATCH_OPL3) {
274 for (i = 0; i < 2; i++) {
275 patch->inst.op[i+2].am_vib =
276 data[OFFSET_4OP + AM_VIB + i];
277 patch->inst.op[i+2].ksl_level =
278 data[OFFSET_4OP + KSL_LEVEL + i];
279 patch->inst.op[i+2].attack_decay =
280 data[OFFSET_4OP + ATTACK_DECAY + i];
281 patch->inst.op[i+2].sustain_release =
282 data[OFFSET_4OP + SUSTAIN_RELEASE + i];
283 patch->inst.op[i+2].wave_select =
284 data[OFFSET_4OP + WAVE_SELECT + i];
285 }
286 patch->inst.feedback_connection[1] =
287 data[OFFSET_4OP + CONNECTION];
288 }
289
290 if (ext) {
291 patch->inst.echo_delay = ext[0];
292 patch->inst.echo_atten = ext[1];
293 patch->inst.chorus_spread = ext[2];
294 patch->inst.trnsps = ext[3];
295 patch->inst.fix_dur = ext[4];
296 patch->inst.modes = ext[5];
297 patch->inst.fix_key = ext[6];
298 }
299
300 if (name)
301 strlcpy(patch->name, name, sizeof(patch->name));
302
303 return 0;
304 }
305 EXPORT_SYMBOL(snd_opl3_load_patch);
306
307 /*
308 * find a patch with the given program and bank numbers, returns its pointer
309 * if no matching patch is found and create_patch is set, it creates a
310 * new patch object.
311 */
312 struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
313 int create_patch)
314 {
315 /* pretty dumb hash key */
316 unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
317 struct fm_patch *patch;
318
319 for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
320 if (patch->prog == prog && patch->bank == bank)
321 return patch;
322 }
323 if (!create_patch)
324 return NULL;
325
326 patch = kzalloc(sizeof(*patch), GFP_KERNEL);
327 if (!patch)
328 return NULL;
329 patch->prog = prog;
330 patch->bank = bank;
331 patch->next = opl3->patch_table[key];
332 opl3->patch_table[key] = patch;
333 return patch;
334 }
335 EXPORT_SYMBOL(snd_opl3_find_patch);
336
337 /*
338 * Clear all patches of the given OPL3 instance
339 */
340 void snd_opl3_clear_patches(struct snd_opl3 *opl3)
341 {
342 int i;
343 for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
344 struct fm_patch *patch, *next;
345 for (patch = opl3->patch_table[i]; patch; patch = next) {
346 next = patch->next;
347 kfree(patch);
348 }
349 }
350 memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
351 }
352 #endif /* OPL3_SUPPORT_SYNTH */
353
354 /* ------------------------------ */
355
356 void snd_opl3_reset(struct snd_opl3 * opl3)
357 {
358 unsigned short opl3_reg;
359
360 unsigned short reg_side;
361 unsigned char voice_offset;
362
363 int max_voices, i;
364
365 max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
366 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
367
368 for (i = 0; i < max_voices; i++) {
369 /* Get register array side and offset of voice */
370 if (i < MAX_OPL2_VOICES) {
371 /* Left register block for voices 0 .. 8 */
372 reg_side = OPL3_LEFT;
373 voice_offset = i;
374 } else {
375 /* Right register block for voices 9 .. 17 */
376 reg_side = OPL3_RIGHT;
377 voice_offset = i - MAX_OPL2_VOICES;
378 }
379 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
380 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
381 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
382 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
383
384 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
385 opl3->command(opl3, opl3_reg, 0x00); /* Note off */
386 }
387
388 opl3->max_voices = MAX_OPL2_VOICES;
389 opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
390
391 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
392 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
393 opl3->rhythm = 0;
394 }
395
396 EXPORT_SYMBOL(snd_opl3_reset);
397
398 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
399 {
400 unsigned short reg_side;
401 unsigned char voice_offset;
402
403 unsigned short opl3_reg;
404 unsigned char reg_val;
405
406 /* Voices 0 - 8 in OPL2 mode */
407 /* Voices 0 - 17 in OPL3 mode */
408 if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
409 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
410 return -EINVAL;
411
412 /* Get register array side and offset of voice */
413 if (note->voice < MAX_OPL2_VOICES) {
414 /* Left register block for voices 0 .. 8 */
415 reg_side = OPL3_LEFT;
416 voice_offset = note->voice;
417 } else {
418 /* Right register block for voices 9 .. 17 */
419 reg_side = OPL3_RIGHT;
420 voice_offset = note->voice - MAX_OPL2_VOICES;
421 }
422
423 /* Set lower 8 bits of note frequency */
424 reg_val = (unsigned char) note->fnum;
425 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
426 opl3->command(opl3, opl3_reg, reg_val);
427
428 reg_val = 0x00;
429 /* Set output sound flag */
430 if (note->key_on)
431 reg_val |= OPL3_KEYON_BIT;
432 /* Set octave */
433 reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
434 /* Set higher 2 bits of note frequency */
435 reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
436
437 /* Set OPL3 KEYON_BLOCK register of requested voice */
438 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
439 opl3->command(opl3, opl3_reg, reg_val);
440
441 return 0;
442 }
443
444
445 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
446 {
447 unsigned short reg_side;
448 unsigned char op_offset;
449 unsigned char voice_offset;
450
451 unsigned short opl3_reg;
452 unsigned char reg_val;
453
454 /* Only operators 1 and 2 */
455 if (voice->op > 1)
456 return -EINVAL;
457 /* Voices 0 - 8 in OPL2 mode */
458 /* Voices 0 - 17 in OPL3 mode */
459 if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
460 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
461 return -EINVAL;
462
463 /* Get register array side and offset of voice */
464 if (voice->voice < MAX_OPL2_VOICES) {
465 /* Left register block for voices 0 .. 8 */
466 reg_side = OPL3_LEFT;
467 voice_offset = voice->voice;
468 } else {
469 /* Right register block for voices 9 .. 17 */
470 reg_side = OPL3_RIGHT;
471 voice_offset = voice->voice - MAX_OPL2_VOICES;
472 }
473 /* Get register offset of operator */
474 op_offset = snd_opl3_regmap[voice_offset][voice->op];
475
476 reg_val = 0x00;
477 /* Set amplitude modulation (tremolo) effect */
478 if (voice->am)
479 reg_val |= OPL3_TREMOLO_ON;
480 /* Set vibrato effect */
481 if (voice->vibrato)
482 reg_val |= OPL3_VIBRATO_ON;
483 /* Set sustaining sound phase */
484 if (voice->do_sustain)
485 reg_val |= OPL3_SUSTAIN_ON;
486 /* Set keyboard scaling bit */
487 if (voice->kbd_scale)
488 reg_val |= OPL3_KSR;
489 /* Set harmonic or frequency multiplier */
490 reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
491
492 /* Set OPL3 AM_VIB register of requested voice/operator */
493 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
494 opl3->command(opl3, opl3_reg, reg_val);
495
496 /* Set decreasing volume of higher notes */
497 reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
498 /* Set output volume */
499 reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
500
501 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
502 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
503 opl3->command(opl3, opl3_reg, reg_val);
504
505 /* Set attack phase level */
506 reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
507 /* Set decay phase level */
508 reg_val |= voice->decay & OPL3_DECAY_MASK;
509
510 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
511 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
512 opl3->command(opl3, opl3_reg, reg_val);
513
514 /* Set sustain phase level */
515 reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
516 /* Set release phase level */
517 reg_val |= voice->release & OPL3_RELEASE_MASK;
518
519 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
520 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
521 opl3->command(opl3, opl3_reg, reg_val);
522
523 /* Set inter-operator feedback */
524 reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
525 /* Set inter-operator connection */
526 if (voice->connection)
527 reg_val |= OPL3_CONNECTION_BIT;
528 /* OPL-3 only */
529 if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
530 if (voice->left)
531 reg_val |= OPL3_VOICE_TO_LEFT;
532 if (voice->right)
533 reg_val |= OPL3_VOICE_TO_RIGHT;
534 }
535 /* Feedback/connection bits are applicable to voice */
536 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
537 opl3->command(opl3, opl3_reg, reg_val);
538
539 /* Select waveform */
540 reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
541 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
542 opl3->command(opl3, opl3_reg, reg_val);
543
544 return 0;
545 }
546
547 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
548 {
549 unsigned char reg_val;
550
551 reg_val = 0x00;
552 /* Set keyboard split method */
553 if (params->kbd_split)
554 reg_val |= OPL3_KEYBOARD_SPLIT;
555 opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
556
557 reg_val = 0x00;
558 /* Set amplitude modulation (tremolo) depth */
559 if (params->am_depth)
560 reg_val |= OPL3_TREMOLO_DEPTH;
561 /* Set vibrato depth */
562 if (params->vib_depth)
563 reg_val |= OPL3_VIBRATO_DEPTH;
564 /* Set percussion mode */
565 if (params->rhythm) {
566 reg_val |= OPL3_PERCUSSION_ENABLE;
567 opl3->rhythm = 1;
568 } else {
569 opl3->rhythm = 0;
570 }
571 /* Play percussion instruments */
572 if (params->bass)
573 reg_val |= OPL3_BASSDRUM_ON;
574 if (params->snare)
575 reg_val |= OPL3_SNAREDRUM_ON;
576 if (params->tomtom)
577 reg_val |= OPL3_TOMTOM_ON;
578 if (params->cymbal)
579 reg_val |= OPL3_CYMBAL_ON;
580 if (params->hihat)
581 reg_val |= OPL3_HIHAT_ON;
582
583 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
584 return 0;
585 }
586
587 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
588 {
589 if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
590 return -EINVAL;
591
592 opl3->fm_mode = mode;
593 if (opl3->hardware >= OPL3_HW_OPL3)
594 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */
595
596 return 0;
597 }
598
599 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
600 {
601 unsigned char reg_val;
602
603 /* OPL-3 only */
604 if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
605 return -EINVAL;
606
607 reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
608 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
609 /* Set 4-op connections */
610 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
611
612 return 0;
613 }
614
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