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ALSA: usb-audio: Avoid access before bLength check in build_audio_procunit()
[linux/fpc-iii.git] / sound / drivers / opl3 / opl3_synth.c
blob42920a2433282befccd62aaa43bbec949fe22e6c
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 <linux/slab.h>
23 #include <linux/export.h>
24 #include <linux/nospec.h>
25 #include <sound/opl3.h>
26 #include <sound/asound_fm.h>
27
28 #if IS_ENABLED(CONFIG_SND_SEQUENCER)
29 #define OPL3_SUPPORT_SYNTH
30 #endif
31
32 /*
33 * There is 18 possible 2 OP voices
34 * (9 in the left and 9 in the right).
35 * The first OP is the modulator and 2nd is the carrier.
36 *
37 * The first three voices in the both sides may be connected
38 * with another voice to a 4 OP voice. For example voice 0
39 * can be connected with voice 3. The operators of voice 3 are
40 * used as operators 3 and 4 of the new 4 OP voice.
41 * In this case the 2 OP voice number 0 is the 'first half' and
42 * voice 3 is the second.
43 */
44
45
46 /*
47 * Register offset table for OPL2/3 voices,
48 * OPL2 / one OPL3 register array side only
49 */
50
51 char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
52 {
53 /* OP1 OP2 OP3 OP4 */
54 /* ------------------------ */
55 { 0x00, 0x03, 0x08, 0x0b },
56 { 0x01, 0x04, 0x09, 0x0c },
57 { 0x02, 0x05, 0x0a, 0x0d },
58
59 { 0x08, 0x0b, 0x00, 0x00 },
60 { 0x09, 0x0c, 0x00, 0x00 },
61 { 0x0a, 0x0d, 0x00, 0x00 },
62
63 { 0x10, 0x13, 0x00, 0x00 }, /* used by percussive voices */
64 { 0x11, 0x14, 0x00, 0x00 }, /* if the percussive mode */
65 { 0x12, 0x15, 0x00, 0x00 } /* is selected (only left reg block) */
66 };
67
68 EXPORT_SYMBOL(snd_opl3_regmap);
69
70 /*
71 * prototypes
72 */
73 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
74 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
75 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
76 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
77 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);
78
79 /* ------------------------------ */
80
81 /*
82 * open the device exclusively
83 */
84 int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
85 {
86 return 0;
87 }
88
89 /*
90 * ioctl for hwdep device:
91 */
92 int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
93 unsigned int cmd, unsigned long arg)
94 {
95 struct snd_opl3 *opl3 = hw->private_data;
96 void __user *argp = (void __user *)arg;
97
98 if (snd_BUG_ON(!opl3))
99 return -EINVAL;
100
101 switch (cmd) {
102 /* get information */
103 case SNDRV_DM_FM_IOCTL_INFO:
104 {
105 struct snd_dm_fm_info info;
106
107 info.fm_mode = opl3->fm_mode;
108 info.rhythm = opl3->rhythm;
109 if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
110 return -EFAULT;
111 return 0;
112 }
113
114 case SNDRV_DM_FM_IOCTL_RESET:
115 #ifdef CONFIG_SND_OSSEMUL
116 case SNDRV_DM_FM_OSS_IOCTL_RESET:
117 #endif
118 snd_opl3_reset(opl3);
119 return 0;
120
121 case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
122 #ifdef CONFIG_SND_OSSEMUL
123 case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
124 #endif
125 {
126 struct snd_dm_fm_note note;
127 if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
128 return -EFAULT;
129 return snd_opl3_play_note(opl3, &note);
130 }
131
132 case SNDRV_DM_FM_IOCTL_SET_VOICE:
133 #ifdef CONFIG_SND_OSSEMUL
134 case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
135 #endif
136 {
137 struct snd_dm_fm_voice voice;
138 if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
139 return -EFAULT;
140 return snd_opl3_set_voice(opl3, &voice);
141 }
142
143 case SNDRV_DM_FM_IOCTL_SET_PARAMS:
144 #ifdef CONFIG_SND_OSSEMUL
145 case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
146 #endif
147 {
148 struct snd_dm_fm_params params;
149 if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
150 return -EFAULT;
151 return snd_opl3_set_params(opl3, &params);
152 }
153
154 case SNDRV_DM_FM_IOCTL_SET_MODE:
155 #ifdef CONFIG_SND_OSSEMUL
156 case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
157 #endif
158 return snd_opl3_set_mode(opl3, (int) arg);
159
160 case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
161 #ifdef CONFIG_SND_OSSEMUL
162 case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
163 #endif
164 return snd_opl3_set_connection(opl3, (int) arg);
165
166 #ifdef OPL3_SUPPORT_SYNTH
167 case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
168 snd_opl3_clear_patches(opl3);
169 return 0;
170 #endif
171
172 #ifdef CONFIG_SND_DEBUG
173 default:
174 snd_printk(KERN_WARNING "unknown IOCTL: 0x%x\n", cmd);
175 #endif
176 }
177 return -ENOTTY;
178 }
179
180 /*
181 * close the device
182 */
183 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
184 {
185 struct snd_opl3 *opl3 = hw->private_data;
186
187 snd_opl3_reset(opl3);
188 return 0;
189 }
190
191 #ifdef OPL3_SUPPORT_SYNTH
192 /*
193 * write the device - load patches
194 */
195 long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
196 loff_t *offset)
197 {
198 struct snd_opl3 *opl3 = hw->private_data;
199 long result = 0;
200 int err = 0;
201 struct sbi_patch inst;
202
203 while (count >= sizeof(inst)) {
204 unsigned char type;
205 if (copy_from_user(&inst, buf, sizeof(inst)))
206 return -EFAULT;
207 if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
208 !memcmp(inst.key, FM_KEY_2OP, 4))
209 type = FM_PATCH_OPL2;
210 else if (!memcmp(inst.key, FM_KEY_4OP, 4))
211 type = FM_PATCH_OPL3;
212 else /* invalid type */
213 break;
214 err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
215 inst.name, inst.extension,
216 inst.data);
217 if (err < 0)
218 break;
219 result += sizeof(inst);
220 count -= sizeof(inst);
221 }
222 return result > 0 ? result : err;
223 }
224
225
226 /*
227 * Patch management
228 */
229
230 /* offsets for SBI params */
231 #define AM_VIB 0
232 #define KSL_LEVEL 2
233 #define ATTACK_DECAY 4
234 #define SUSTAIN_RELEASE 6
235 #define WAVE_SELECT 8
236
237 /* offset for SBI instrument */
238 #define CONNECTION 10
239 #define OFFSET_4OP 11
240
241 /*
242 * load a patch, obviously.
243 *
244 * loaded on the given program and bank numbers with the given type
245 * (FM_PATCH_OPLx).
246 * data is the pointer of SBI record _without_ header (key and name).
247 * name is the name string of the patch.
248 * ext is the extension data of 7 bytes long (stored in name of SBI
249 * data up to offset 25), or NULL to skip.
250 * return 0 if successful or a negative error code.
251 */
252 int snd_opl3_load_patch(struct snd_opl3 *opl3,
253 int prog, int bank, int type,
254 const char *name,
255 const unsigned char *ext,
256 const unsigned char *data)
257 {
258 struct fm_patch *patch;
259 int i;
260
261 patch = snd_opl3_find_patch(opl3, prog, bank, 1);
262 if (!patch)
263 return -ENOMEM;
264
265 patch->type = type;
266
267 for (i = 0; i < 2; i++) {
268 patch->inst.op[i].am_vib = data[AM_VIB + i];
269 patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
270 patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
271 patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
272 patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
273 }
274 patch->inst.feedback_connection[0] = data[CONNECTION];
275
276 if (type == FM_PATCH_OPL3) {
277 for (i = 0; i < 2; i++) {
278 patch->inst.op[i+2].am_vib =
279 data[OFFSET_4OP + AM_VIB + i];
280 patch->inst.op[i+2].ksl_level =
281 data[OFFSET_4OP + KSL_LEVEL + i];
282 patch->inst.op[i+2].attack_decay =
283 data[OFFSET_4OP + ATTACK_DECAY + i];
284 patch->inst.op[i+2].sustain_release =
285 data[OFFSET_4OP + SUSTAIN_RELEASE + i];
286 patch->inst.op[i+2].wave_select =
287 data[OFFSET_4OP + WAVE_SELECT + i];
288 }
289 patch->inst.feedback_connection[1] =
290 data[OFFSET_4OP + CONNECTION];
291 }
292
293 if (ext) {
294 patch->inst.echo_delay = ext[0];
295 patch->inst.echo_atten = ext[1];
296 patch->inst.chorus_spread = ext[2];
297 patch->inst.trnsps = ext[3];
298 patch->inst.fix_dur = ext[4];
299 patch->inst.modes = ext[5];
300 patch->inst.fix_key = ext[6];
301 }
302
303 if (name)
304 strlcpy(patch->name, name, sizeof(patch->name));
305
306 return 0;
307 }
308 EXPORT_SYMBOL(snd_opl3_load_patch);
309
310 /*
311 * find a patch with the given program and bank numbers, returns its pointer
312 * if no matching patch is found and create_patch is set, it creates a
313 * new patch object.
314 */
315 struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
316 int create_patch)
317 {
318 /* pretty dumb hash key */
319 unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
320 struct fm_patch *patch;
321
322 for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
323 if (patch->prog == prog && patch->bank == bank)
324 return patch;
325 }
326 if (!create_patch)
327 return NULL;
328
329 patch = kzalloc(sizeof(*patch), GFP_KERNEL);
330 if (!patch)
331 return NULL;
332 patch->prog = prog;
333 patch->bank = bank;
334 patch->next = opl3->patch_table[key];
335 opl3->patch_table[key] = patch;
336 return patch;
337 }
338 EXPORT_SYMBOL(snd_opl3_find_patch);
339
340 /*
341 * Clear all patches of the given OPL3 instance
342 */
343 void snd_opl3_clear_patches(struct snd_opl3 *opl3)
344 {
345 int i;
346 for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
347 struct fm_patch *patch, *next;
348 for (patch = opl3->patch_table[i]; patch; patch = next) {
349 next = patch->next;
350 kfree(patch);
351 }
352 }
353 memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
354 }
355 #endif /* OPL3_SUPPORT_SYNTH */
356
357 /* ------------------------------ */
358
359 void snd_opl3_reset(struct snd_opl3 * opl3)
360 {
361 unsigned short opl3_reg;
362
363 unsigned short reg_side;
364 unsigned char voice_offset;
365
366 int max_voices, i;
367
368 max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
369 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
370
371 for (i = 0; i < max_voices; i++) {
372 /* Get register array side and offset of voice */
373 if (i < MAX_OPL2_VOICES) {
374 /* Left register block for voices 0 .. 8 */
375 reg_side = OPL3_LEFT;
376 voice_offset = i;
377 } else {
378 /* Right register block for voices 9 .. 17 */
379 reg_side = OPL3_RIGHT;
380 voice_offset = i - MAX_OPL2_VOICES;
381 }
382 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
383 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
384 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
385 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
386
387 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
388 opl3->command(opl3, opl3_reg, 0x00); /* Note off */
389 }
390
391 opl3->max_voices = MAX_OPL2_VOICES;
392 opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
393
394 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
395 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
396 opl3->rhythm = 0;
397 }
398
399 EXPORT_SYMBOL(snd_opl3_reset);
400
401 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
402 {
403 unsigned short reg_side;
404 unsigned char voice_offset;
405
406 unsigned short opl3_reg;
407 unsigned char reg_val;
408
409 /* Voices 0 - 8 in OPL2 mode */
410 /* Voices 0 - 17 in OPL3 mode */
411 if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
412 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
413 return -EINVAL;
414
415 /* Get register array side and offset of voice */
416 if (note->voice < MAX_OPL2_VOICES) {
417 /* Left register block for voices 0 .. 8 */
418 reg_side = OPL3_LEFT;
419 voice_offset = note->voice;
420 } else {
421 /* Right register block for voices 9 .. 17 */
422 reg_side = OPL3_RIGHT;
423 voice_offset = note->voice - MAX_OPL2_VOICES;
424 }
425
426 /* Set lower 8 bits of note frequency */
427 reg_val = (unsigned char) note->fnum;
428 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
429 opl3->command(opl3, opl3_reg, reg_val);
430
431 reg_val = 0x00;
432 /* Set output sound flag */
433 if (note->key_on)
434 reg_val |= OPL3_KEYON_BIT;
435 /* Set octave */
436 reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
437 /* Set higher 2 bits of note frequency */
438 reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
439
440 /* Set OPL3 KEYON_BLOCK register of requested voice */
441 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
442 opl3->command(opl3, opl3_reg, reg_val);
443
444 return 0;
445 }
446
447
448 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
449 {
450 unsigned short reg_side;
451 unsigned char op_offset;
452 unsigned char voice_offset, voice_op;
453
454 unsigned short opl3_reg;
455 unsigned char reg_val;
456
457 /* Only operators 1 and 2 */
458 if (voice->op > 1)
459 return -EINVAL;
460 /* Voices 0 - 8 in OPL2 mode */
461 /* Voices 0 - 17 in OPL3 mode */
462 if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
463 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
464 return -EINVAL;
465
466 /* Get register array side and offset of voice */
467 if (voice->voice < MAX_OPL2_VOICES) {
468 /* Left register block for voices 0 .. 8 */
469 reg_side = OPL3_LEFT;
470 voice_offset = voice->voice;
471 } else {
472 /* Right register block for voices 9 .. 17 */
473 reg_side = OPL3_RIGHT;
474 voice_offset = voice->voice - MAX_OPL2_VOICES;
475 }
476 /* Get register offset of operator */
477 voice_offset = array_index_nospec(voice_offset, MAX_OPL2_VOICES);
478 voice_op = array_index_nospec(voice->op, 4);
479 op_offset = snd_opl3_regmap[voice_offset][voice_op];
480
481 reg_val = 0x00;
482 /* Set amplitude modulation (tremolo) effect */
483 if (voice->am)
484 reg_val |= OPL3_TREMOLO_ON;
485 /* Set vibrato effect */
486 if (voice->vibrato)
487 reg_val |= OPL3_VIBRATO_ON;
488 /* Set sustaining sound phase */
489 if (voice->do_sustain)
490 reg_val |= OPL3_SUSTAIN_ON;
491 /* Set keyboard scaling bit */
492 if (voice->kbd_scale)
493 reg_val |= OPL3_KSR;
494 /* Set harmonic or frequency multiplier */
495 reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
496
497 /* Set OPL3 AM_VIB register of requested voice/operator */
498 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
499 opl3->command(opl3, opl3_reg, reg_val);
500
501 /* Set decreasing volume of higher notes */
502 reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
503 /* Set output volume */
504 reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
505
506 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
507 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
508 opl3->command(opl3, opl3_reg, reg_val);
509
510 /* Set attack phase level */
511 reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
512 /* Set decay phase level */
513 reg_val |= voice->decay & OPL3_DECAY_MASK;
514
515 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
516 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
517 opl3->command(opl3, opl3_reg, reg_val);
518
519 /* Set sustain phase level */
520 reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
521 /* Set release phase level */
522 reg_val |= voice->release & OPL3_RELEASE_MASK;
523
524 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
525 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
526 opl3->command(opl3, opl3_reg, reg_val);
527
528 /* Set inter-operator feedback */
529 reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
530 /* Set inter-operator connection */
531 if (voice->connection)
532 reg_val |= OPL3_CONNECTION_BIT;
533 /* OPL-3 only */
534 if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
535 if (voice->left)
536 reg_val |= OPL3_VOICE_TO_LEFT;
537 if (voice->right)
538 reg_val |= OPL3_VOICE_TO_RIGHT;
539 }
540 /* Feedback/connection bits are applicable to voice */
541 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
542 opl3->command(opl3, opl3_reg, reg_val);
543
544 /* Select waveform */
545 reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
546 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
547 opl3->command(opl3, opl3_reg, reg_val);
548
549 return 0;
550 }
551
552 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
553 {
554 unsigned char reg_val;
555
556 reg_val = 0x00;
557 /* Set keyboard split method */
558 if (params->kbd_split)
559 reg_val |= OPL3_KEYBOARD_SPLIT;
560 opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
561
562 reg_val = 0x00;
563 /* Set amplitude modulation (tremolo) depth */
564 if (params->am_depth)
565 reg_val |= OPL3_TREMOLO_DEPTH;
566 /* Set vibrato depth */
567 if (params->vib_depth)
568 reg_val |= OPL3_VIBRATO_DEPTH;
569 /* Set percussion mode */
570 if (params->rhythm) {
571 reg_val |= OPL3_PERCUSSION_ENABLE;
572 opl3->rhythm = 1;
573 } else {
574 opl3->rhythm = 0;
575 }
576 /* Play percussion instruments */
577 if (params->bass)
578 reg_val |= OPL3_BASSDRUM_ON;
579 if (params->snare)
580 reg_val |= OPL3_SNAREDRUM_ON;
581 if (params->tomtom)
582 reg_val |= OPL3_TOMTOM_ON;
583 if (params->cymbal)
584 reg_val |= OPL3_CYMBAL_ON;
585 if (params->hihat)
586 reg_val |= OPL3_HIHAT_ON;
587
588 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
589 return 0;
590 }
591
592 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
593 {
594 if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
595 return -EINVAL;
596
597 opl3->fm_mode = mode;
598 if (opl3->hardware >= OPL3_HW_OPL3)
599 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */
600
601 return 0;
602 }
603
604 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
605 {
606 unsigned char reg_val;
607
608 /* OPL-3 only */
609 if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
610 return -EINVAL;
611
612 reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
613 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
614 /* Set 4-op connections */
615 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
616
617 return 0;
618 }
619
Linux with added FPC-III support