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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
[wrt350n-kernel.git] / sound / drivers / opl3 / opl3_synth.c
blob7e9e2e44bda6f48f5a93b521a41af303cf806141
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 <<<<<<< HEAD:sound/drivers/opl3/opl3_synth.c
26 =======
27 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
28 #define OPL3_SUPPORT_SYNTH
29 #endif
30
31 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:sound/drivers/opl3/opl3_synth.c
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 snd_assert(opl3 != NULL, return -EINVAL);
99
100 switch (cmd) {
101 /* get information */
102 case SNDRV_DM_FM_IOCTL_INFO:
103 {
104 struct snd_dm_fm_info info;
105
106 info.fm_mode = opl3->fm_mode;
107 info.rhythm = opl3->rhythm;
108 if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
109 return -EFAULT;
110 return 0;
111 }
112
113 case SNDRV_DM_FM_IOCTL_RESET:
114 #ifdef CONFIG_SND_OSSEMUL
115 case SNDRV_DM_FM_OSS_IOCTL_RESET:
116 #endif
117 snd_opl3_reset(opl3);
118 return 0;
119
120 case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
121 #ifdef CONFIG_SND_OSSEMUL
122 case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
123 #endif
124 {
125 struct snd_dm_fm_note note;
126 if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
127 return -EFAULT;
128 return snd_opl3_play_note(opl3, &note);
129 }
130
131 case SNDRV_DM_FM_IOCTL_SET_VOICE:
132 #ifdef CONFIG_SND_OSSEMUL
133 case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
134 #endif
135 {
136 struct snd_dm_fm_voice voice;
137 if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
138 return -EFAULT;
139 return snd_opl3_set_voice(opl3, &voice);
140 }
141
142 case SNDRV_DM_FM_IOCTL_SET_PARAMS:
143 #ifdef CONFIG_SND_OSSEMUL
144 case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
145 #endif
146 {
147 struct snd_dm_fm_params params;
148 if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
149 return -EFAULT;
150 return snd_opl3_set_params(opl3, &params);
151 }
152
153 case SNDRV_DM_FM_IOCTL_SET_MODE:
154 #ifdef CONFIG_SND_OSSEMUL
155 case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
156 #endif
157 return snd_opl3_set_mode(opl3, (int) arg);
158
159 case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
160 #ifdef CONFIG_SND_OSSEMUL
161 case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
162 #endif
163 return snd_opl3_set_connection(opl3, (int) arg);
164
165 <<<<<<< HEAD:sound/drivers/opl3/opl3_synth.c
166 =======
167 #ifdef OPL3_SUPPORT_SYNTH
168 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:sound/drivers/opl3/opl3_synth.c
169 case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
170 snd_opl3_clear_patches(opl3);
171 return 0;
172 <<<<<<< HEAD:sound/drivers/opl3/opl3_synth.c
173 =======
174 #endif
175 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:sound/drivers/opl3/opl3_synth.c
176
177 #ifdef CONFIG_SND_DEBUG
178 default:
179 snd_printk("unknown IOCTL: 0x%x\n", cmd);
180 #endif
181 }
182 return -ENOTTY;
183 }
184
185 /*
186 * close the device
187 */
188 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
189 {
190 struct snd_opl3 *opl3 = hw->private_data;
191
192 snd_opl3_reset(opl3);
193 return 0;
194 }
195
196 <<<<<<< HEAD:sound/drivers/opl3/opl3_synth.c
197 =======
198 #ifdef OPL3_SUPPORT_SYNTH
199 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:sound/drivers/opl3/opl3_synth.c
200 /*
201 * write the device - load patches
202 */
203 long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
204 loff_t *offset)
205 {
206 struct snd_opl3 *opl3 = hw->private_data;
207 long result = 0;
208 int err = 0;
209 struct sbi_patch inst;
210
211 while (count >= sizeof(inst)) {
212 unsigned char type;
213 if (copy_from_user(&inst, buf, sizeof(inst)))
214 return -EFAULT;
215 if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
216 !memcmp(inst.key, FM_KEY_2OP, 4))
217 type = FM_PATCH_OPL2;
218 else if (!memcmp(inst.key, FM_KEY_4OP, 4))
219 type = FM_PATCH_OPL3;
220 else /* invalid type */
221 break;
222 err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
223 inst.name, inst.extension,
224 inst.data);
225 if (err < 0)
226 break;
227 result += sizeof(inst);
228 count -= sizeof(inst);
229 }
230 return result > 0 ? result : err;
231 }
232
233
234 /*
235 * Patch management
236 */
237
238 /* offsets for SBI params */
239 #define AM_VIB 0
240 #define KSL_LEVEL 2
241 #define ATTACK_DECAY 4
242 #define SUSTAIN_RELEASE 6
243 #define WAVE_SELECT 8
244
245 /* offset for SBI instrument */
246 #define CONNECTION 10
247 #define OFFSET_4OP 11
248
249 /*
250 * load a patch, obviously.
251 *
252 * loaded on the given program and bank numbers with the given type
253 * (FM_PATCH_OPLx).
254 * data is the pointer of SBI record _without_ header (key and name).
255 * name is the name string of the patch.
256 * ext is the extension data of 7 bytes long (stored in name of SBI
257 * data up to offset 25), or NULL to skip.
258 * return 0 if successful or a negative error code.
259 */
260 int snd_opl3_load_patch(struct snd_opl3 *opl3,
261 int prog, int bank, int type,
262 const char *name,
263 const unsigned char *ext,
264 const unsigned char *data)
265 {
266 struct fm_patch *patch;
267 int i;
268
269 patch = snd_opl3_find_patch(opl3, prog, bank, 1);
270 if (!patch)
271 return -ENOMEM;
272
273 patch->type = type;
274
275 for (i = 0; i < 2; i++) {
276 patch->inst.op[i].am_vib = data[AM_VIB + i];
277 patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
278 patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
279 patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
280 patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
281 }
282 patch->inst.feedback_connection[0] = data[CONNECTION];
283
284 if (type == FM_PATCH_OPL3) {
285 for (i = 0; i < 2; i++) {
286 patch->inst.op[i+2].am_vib =
287 data[OFFSET_4OP + AM_VIB + i];
288 patch->inst.op[i+2].ksl_level =
289 data[OFFSET_4OP + KSL_LEVEL + i];
290 patch->inst.op[i+2].attack_decay =
291 data[OFFSET_4OP + ATTACK_DECAY + i];
292 patch->inst.op[i+2].sustain_release =
293 data[OFFSET_4OP + SUSTAIN_RELEASE + i];
294 patch->inst.op[i+2].wave_select =
295 data[OFFSET_4OP + WAVE_SELECT + i];
296 }
297 patch->inst.feedback_connection[1] =
298 data[OFFSET_4OP + CONNECTION];
299 }
300
301 if (ext) {
302 patch->inst.echo_delay = ext[0];
303 patch->inst.echo_atten = ext[1];
304 patch->inst.chorus_spread = ext[2];
305 patch->inst.trnsps = ext[3];
306 patch->inst.fix_dur = ext[4];
307 patch->inst.modes = ext[5];
308 patch->inst.fix_key = ext[6];
309 }
310
311 if (name)
312 strlcpy(patch->name, name, sizeof(patch->name));
313
314 return 0;
315 }
316 EXPORT_SYMBOL(snd_opl3_load_patch);
317
318 /*
319 * find a patch with the given program and bank numbers, returns its pointer
320 * if no matching patch is found and create_patch is set, it creates a
321 * new patch object.
322 */
323 struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
324 int create_patch)
325 {
326 /* pretty dumb hash key */
327 unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
328 struct fm_patch *patch;
329
330 for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
331 if (patch->prog == prog && patch->bank == bank)
332 return patch;
333 }
334 if (!create_patch)
335 return NULL;
336
337 patch = kzalloc(sizeof(*patch), GFP_KERNEL);
338 if (!patch)
339 return NULL;
340 patch->prog = prog;
341 patch->bank = bank;
342 patch->next = opl3->patch_table[key];
343 opl3->patch_table[key] = patch;
344 return patch;
345 }
346 EXPORT_SYMBOL(snd_opl3_find_patch);
347
348 /*
349 * Clear all patches of the given OPL3 instance
350 */
351 void snd_opl3_clear_patches(struct snd_opl3 *opl3)
352 {
353 int i;
354 for (i = 0; i < OPL3_PATCH_HASH_SIZE; i++) {
355 struct fm_patch *patch, *next;
356 for (patch = opl3->patch_table[i]; patch; patch = next) {
357 next = patch->next;
358 kfree(patch);
359 }
360 }
361 memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
362 }
363 <<<<<<< HEAD:sound/drivers/opl3/opl3_synth.c
364 =======
365 #endif /* OPL3_SUPPORT_SYNTH */
366 >>>>>>> 264e3e889d86e552b4191d69bb60f4f3b383135a:sound/drivers/opl3/opl3_synth.c
367
368 /* ------------------------------ */
369
370 void snd_opl3_reset(struct snd_opl3 * opl3)
371 {
372 unsigned short opl3_reg;
373
374 unsigned short reg_side;
375 unsigned char voice_offset;
376
377 int max_voices, i;
378
379 max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
380 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
381
382 for (i = 0; i < max_voices; i++) {
383 /* Get register array side and offset of voice */
384 if (i < MAX_OPL2_VOICES) {
385 /* Left register block for voices 0 .. 8 */
386 reg_side = OPL3_LEFT;
387 voice_offset = i;
388 } else {
389 /* Right register block for voices 9 .. 17 */
390 reg_side = OPL3_RIGHT;
391 voice_offset = i - MAX_OPL2_VOICES;
392 }
393 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
394 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
395 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
396 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
397
398 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
399 opl3->command(opl3, opl3_reg, 0x00); /* Note off */
400 }
401
402 opl3->max_voices = MAX_OPL2_VOICES;
403 opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
404
405 opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
406 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00); /* Melodic mode */
407 opl3->rhythm = 0;
408 }
409
410 EXPORT_SYMBOL(snd_opl3_reset);
411
412 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
413 {
414 unsigned short reg_side;
415 unsigned char voice_offset;
416
417 unsigned short opl3_reg;
418 unsigned char reg_val;
419
420 /* Voices 0 - 8 in OPL2 mode */
421 /* Voices 0 - 17 in OPL3 mode */
422 if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
423 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
424 return -EINVAL;
425
426 /* Get register array side and offset of voice */
427 if (note->voice < MAX_OPL2_VOICES) {
428 /* Left register block for voices 0 .. 8 */
429 reg_side = OPL3_LEFT;
430 voice_offset = note->voice;
431 } else {
432 /* Right register block for voices 9 .. 17 */
433 reg_side = OPL3_RIGHT;
434 voice_offset = note->voice - MAX_OPL2_VOICES;
435 }
436
437 /* Set lower 8 bits of note frequency */
438 reg_val = (unsigned char) note->fnum;
439 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
440 opl3->command(opl3, opl3_reg, reg_val);
441
442 reg_val = 0x00;
443 /* Set output sound flag */
444 if (note->key_on)
445 reg_val |= OPL3_KEYON_BIT;
446 /* Set octave */
447 reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
448 /* Set higher 2 bits of note frequency */
449 reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
450
451 /* Set OPL3 KEYON_BLOCK register of requested voice */
452 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
453 opl3->command(opl3, opl3_reg, reg_val);
454
455 return 0;
456 }
457
458
459 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
460 {
461 unsigned short reg_side;
462 unsigned char op_offset;
463 unsigned char voice_offset;
464
465 unsigned short opl3_reg;
466 unsigned char reg_val;
467
468 /* Only operators 1 and 2 */
469 if (voice->op > 1)
470 return -EINVAL;
471 /* Voices 0 - 8 in OPL2 mode */
472 /* Voices 0 - 17 in OPL3 mode */
473 if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
474 MAX_OPL3_VOICES : MAX_OPL2_VOICES))
475 return -EINVAL;
476
477 /* Get register array side and offset of voice */
478 if (voice->voice < MAX_OPL2_VOICES) {
479 /* Left register block for voices 0 .. 8 */
480 reg_side = OPL3_LEFT;
481 voice_offset = voice->voice;
482 } else {
483 /* Right register block for voices 9 .. 17 */
484 reg_side = OPL3_RIGHT;
485 voice_offset = voice->voice - MAX_OPL2_VOICES;
486 }
487 /* Get register offset of operator */
488 op_offset = snd_opl3_regmap[voice_offset][voice->op];
489
490 reg_val = 0x00;
491 /* Set amplitude modulation (tremolo) effect */
492 if (voice->am)
493 reg_val |= OPL3_TREMOLO_ON;
494 /* Set vibrato effect */
495 if (voice->vibrato)
496 reg_val |= OPL3_VIBRATO_ON;
497 /* Set sustaining sound phase */
498 if (voice->do_sustain)
499 reg_val |= OPL3_SUSTAIN_ON;
500 /* Set keyboard scaling bit */
501 if (voice->kbd_scale)
502 reg_val |= OPL3_KSR;
503 /* Set harmonic or frequency multiplier */
504 reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
505
506 /* Set OPL3 AM_VIB register of requested voice/operator */
507 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
508 opl3->command(opl3, opl3_reg, reg_val);
509
510 /* Set decreasing volume of higher notes */
511 reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
512 /* Set output volume */
513 reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
514
515 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
516 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
517 opl3->command(opl3, opl3_reg, reg_val);
518
519 /* Set attack phase level */
520 reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
521 /* Set decay phase level */
522 reg_val |= voice->decay & OPL3_DECAY_MASK;
523
524 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
525 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
526 opl3->command(opl3, opl3_reg, reg_val);
527
528 /* Set sustain phase level */
529 reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
530 /* Set release phase level */
531 reg_val |= voice->release & OPL3_RELEASE_MASK;
532
533 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
534 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
535 opl3->command(opl3, opl3_reg, reg_val);
536
537 /* Set inter-operator feedback */
538 reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
539 /* Set inter-operator connection */
540 if (voice->connection)
541 reg_val |= OPL3_CONNECTION_BIT;
542 /* OPL-3 only */
543 if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
544 if (voice->left)
545 reg_val |= OPL3_VOICE_TO_LEFT;
546 if (voice->right)
547 reg_val |= OPL3_VOICE_TO_RIGHT;
548 }
549 /* Feedback/connection bits are applicable to voice */
550 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
551 opl3->command(opl3, opl3_reg, reg_val);
552
553 /* Select waveform */
554 reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
555 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
556 opl3->command(opl3, opl3_reg, reg_val);
557
558 return 0;
559 }
560
561 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
562 {
563 unsigned char reg_val;
564
565 reg_val = 0x00;
566 /* Set keyboard split method */
567 if (params->kbd_split)
568 reg_val |= OPL3_KEYBOARD_SPLIT;
569 opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
570
571 reg_val = 0x00;
572 /* Set amplitude modulation (tremolo) depth */
573 if (params->am_depth)
574 reg_val |= OPL3_TREMOLO_DEPTH;
575 /* Set vibrato depth */
576 if (params->vib_depth)
577 reg_val |= OPL3_VIBRATO_DEPTH;
578 /* Set percussion mode */
579 if (params->rhythm) {
580 reg_val |= OPL3_PERCUSSION_ENABLE;
581 opl3->rhythm = 1;
582 } else {
583 opl3->rhythm = 0;
584 }
585 /* Play percussion instruments */
586 if (params->bass)
587 reg_val |= OPL3_BASSDRUM_ON;
588 if (params->snare)
589 reg_val |= OPL3_SNAREDRUM_ON;
590 if (params->tomtom)
591 reg_val |= OPL3_TOMTOM_ON;
592 if (params->cymbal)
593 reg_val |= OPL3_CYMBAL_ON;
594 if (params->hihat)
595 reg_val |= OPL3_HIHAT_ON;
596
597 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
598 return 0;
599 }
600
601 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
602 {
603 if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
604 return -EINVAL;
605
606 opl3->fm_mode = mode;
607 if (opl3->hardware >= OPL3_HW_OPL3)
608 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00); /* Clear 4-op connections */
609
610 return 0;
611 }
612
613 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
614 {
615 unsigned char reg_val;
616
617 /* OPL-3 only */
618 if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
619 return -EINVAL;
620
621 reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
622 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
623 /* Set 4-op connections */
624 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
625
626 return 0;
627 }
628
WRT350N Kernel Patches