summaryrefslogtreecommitdiff
path: root/sound/drivers/opl3/opl3_synth.c
blob: 3534a0e3342a9168da851e16d3a323f73465572f (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
/*
 *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
 *                   
 *  Routines for OPL2/OPL3/OPL4 control
 *
 *   This program is free software; you can redistribute it and/or modify 
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

#include <sound/opl3.h>
#include <sound/asound_fm.h>

/*
 *    There is 18 possible 2 OP voices
 *      (9 in the left and 9 in the right).
 *      The first OP is the modulator and 2nd is the carrier.
 *
 *      The first three voices in the both sides may be connected
 *      with another voice to a 4 OP voice. For example voice 0
 *      can be connected with voice 3. The operators of voice 3 are
 *      used as operators 3 and 4 of the new 4 OP voice.
 *      In this case the 2 OP voice number 0 is the 'first half' and
 *      voice 3 is the second.
 */


/*
 *    Register offset table for OPL2/3 voices,
 *    OPL2 / one OPL3 register array side only
 */

char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
{
/*	  OP1   OP2   OP3   OP4		*/
/*	 ------------------------	*/
	{ 0x00, 0x03, 0x08, 0x0b },
	{ 0x01, 0x04, 0x09, 0x0c },
	{ 0x02, 0x05, 0x0a, 0x0d },

	{ 0x08, 0x0b, 0x00, 0x00 },
	{ 0x09, 0x0c, 0x00, 0x00 },
	{ 0x0a, 0x0d, 0x00, 0x00 },

	{ 0x10, 0x13, 0x00, 0x00 },	/* used by percussive voices */
	{ 0x11, 0x14, 0x00, 0x00 },	/* if the percussive mode */
	{ 0x12, 0x15, 0x00, 0x00 }	/* is selected (only left reg block) */
};

/*
 * prototypes
 */
static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);

/* ------------------------------ */

/*
 * open the device exclusively
 */
int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
{
	struct snd_opl3 *opl3 = hw->private_data;

	down(&opl3->access_mutex);
	if (opl3->used) {
		up(&opl3->access_mutex);
		return -EAGAIN;
	}
	opl3->used++;
	up(&opl3->access_mutex);

	return 0;
}

/*
 * ioctl for hwdep device:
 */
int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
		   unsigned int cmd, unsigned long arg)
{
	struct snd_opl3 *opl3 = hw->private_data;
	void __user *argp = (void __user *)arg;

	snd_assert(opl3 != NULL, return -EINVAL);

	switch (cmd) {
		/* get information */
	case SNDRV_DM_FM_IOCTL_INFO:
		{
			struct snd_dm_fm_info info;

			info.fm_mode = opl3->fm_mode;
			info.rhythm = opl3->rhythm;
			if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
				return -EFAULT;
			return 0;
		}

	case SNDRV_DM_FM_IOCTL_RESET:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_RESET:
#endif
		snd_opl3_reset(opl3);
		return 0;

	case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
#endif
		{
			struct snd_dm_fm_note note;
			if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
				return -EFAULT;
			return snd_opl3_play_note(opl3, &note);
		}

	case SNDRV_DM_FM_IOCTL_SET_VOICE:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
#endif
		{
			struct snd_dm_fm_voice voice;
			if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
				return -EFAULT;
			return snd_opl3_set_voice(opl3, &voice);
		}

	case SNDRV_DM_FM_IOCTL_SET_PARAMS:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
#endif
		{
			struct snd_dm_fm_params params;
			if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
				return -EFAULT;
			return snd_opl3_set_params(opl3, &params);
		}

	case SNDRV_DM_FM_IOCTL_SET_MODE:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
#endif
		return snd_opl3_set_mode(opl3, (int) arg);

	case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
#ifdef CONFIG_SND_OSSEMUL
	case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
#endif
		return snd_opl3_set_connection(opl3, (int) arg);

#ifdef CONFIG_SND_DEBUG
	default:
		snd_printk("unknown IOCTL: 0x%x\n", cmd);
#endif
	}
	return -ENOTTY;
}

/*
 * close the device
 */
int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
{
	struct snd_opl3 *opl3 = hw->private_data;

	snd_opl3_reset(opl3);
	down(&opl3->access_mutex);
	opl3->used--;
	up(&opl3->access_mutex);

	return 0;
}

/* ------------------------------ */

void snd_opl3_reset(struct snd_opl3 * opl3)
{
	unsigned short opl3_reg;

	unsigned short reg_side;
	unsigned char voice_offset;

	int max_voices, i;

	max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
		MAX_OPL2_VOICES : MAX_OPL3_VOICES;

	for (i = 0; i < max_voices; i++) {
		/* Get register array side and offset of voice */
		if (i < MAX_OPL2_VOICES) {
			/* Left register block for voices 0 .. 8 */
			reg_side = OPL3_LEFT;
			voice_offset = i;
		} else {
			/* Right register block for voices 9 .. 17 */
			reg_side = OPL3_RIGHT;
			voice_offset = i - MAX_OPL2_VOICES;
		}
		opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
		opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
		opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
		opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */

		opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
		opl3->command(opl3, opl3_reg, 0x00);	/* Note off */
	}

	opl3->max_voices = MAX_OPL2_VOICES;
	opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;

	opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
	opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);	/* Melodic mode */
	opl3->rhythm = 0;
}


static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
{
	unsigned short reg_side;
	unsigned char voice_offset;

	unsigned short opl3_reg;
	unsigned char reg_val;

	/* Voices 0 -  8 in OPL2 mode */
	/* Voices 0 - 17 in OPL3 mode */
	if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
			    MAX_OPL3_VOICES : MAX_OPL2_VOICES))
		return -EINVAL;

	/* Get register array side and offset of voice */
	if (note->voice < MAX_OPL2_VOICES) {
		/* Left register block for voices 0 .. 8 */
		reg_side = OPL3_LEFT;
		voice_offset = note->voice;
	} else {
		/* Right register block for voices 9 .. 17 */
		reg_side = OPL3_RIGHT;
		voice_offset = note->voice - MAX_OPL2_VOICES;
	}

	/* Set lower 8 bits of note frequency */
	reg_val = (unsigned char) note->fnum;
	opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
	opl3->command(opl3, opl3_reg, reg_val);
	
	reg_val = 0x00;
	/* Set output sound flag */
	if (note->key_on)
		reg_val |= OPL3_KEYON_BIT;
	/* Set octave */
	reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
	/* Set higher 2 bits of note frequency */
	reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;

	/* Set OPL3 KEYON_BLOCK register of requested voice */ 
	opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	return 0;
}


static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
{
	unsigned short reg_side;
	unsigned char op_offset;
	unsigned char voice_offset;

	unsigned short opl3_reg;
	unsigned char reg_val;

	/* Only operators 1 and 2 */
	if (voice->op > 1)
		return -EINVAL;
	/* Voices 0 -  8 in OPL2 mode */
	/* Voices 0 - 17 in OPL3 mode */
	if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
			     MAX_OPL3_VOICES : MAX_OPL2_VOICES))
		return -EINVAL;

	/* Get register array side and offset of voice */
	if (voice->voice < MAX_OPL2_VOICES) {
		/* Left register block for voices 0 .. 8 */
		reg_side = OPL3_LEFT;
		voice_offset = voice->voice;
	} else {
		/* Right register block for voices 9 .. 17 */
		reg_side = OPL3_RIGHT;
		voice_offset = voice->voice - MAX_OPL2_VOICES;
	}
	/* Get register offset of operator */
	op_offset = snd_opl3_regmap[voice_offset][voice->op];

	reg_val = 0x00;
	/* Set amplitude modulation (tremolo) effect */
	if (voice->am)
		reg_val |= OPL3_TREMOLO_ON;
	/* Set vibrato effect */
	if (voice->vibrato)
		reg_val |= OPL3_VIBRATO_ON;
	/* Set sustaining sound phase */
	if (voice->do_sustain)
		reg_val |= OPL3_SUSTAIN_ON;
	/* Set keyboard scaling bit */ 
	if (voice->kbd_scale)
		reg_val |= OPL3_KSR;
	/* Set harmonic or frequency multiplier */
	reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;

	/* Set OPL3 AM_VIB register of requested voice/operator */ 
	opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	/* Set decreasing volume of higher notes */
	reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
	/* Set output volume */
	reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;

	/* Set OPL3 KSL_LEVEL register of requested voice/operator */ 
	opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	/* Set attack phase level */
	reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
	/* Set decay phase level */
	reg_val |= voice->decay & OPL3_DECAY_MASK;

	/* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 
	opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	/* Set sustain phase level */
	reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
	/* Set release phase level */
	reg_val |= voice->release & OPL3_RELEASE_MASK;

	/* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 
	opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	/* Set inter-operator feedback */
	reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
	/* Set inter-operator connection */
	if (voice->connection)
		reg_val |= OPL3_CONNECTION_BIT;
	/* OPL-3 only */
	if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
		if (voice->left)
			reg_val |= OPL3_VOICE_TO_LEFT;
		if (voice->right)
			reg_val |= OPL3_VOICE_TO_RIGHT;
	}
	/* Feedback/connection bits are applicable to voice */
	opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	/* Select waveform */
	reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
	opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
	opl3->command(opl3, opl3_reg, reg_val);

	return 0;
}

static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
{
	unsigned char reg_val;

	reg_val = 0x00;
	/* Set keyboard split method */
	if (params->kbd_split)
		reg_val |= OPL3_KEYBOARD_SPLIT;
	opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);

	reg_val = 0x00;
	/* Set amplitude modulation (tremolo) depth */
	if (params->am_depth)
		reg_val |= OPL3_TREMOLO_DEPTH;
	/* Set vibrato depth */
	if (params->vib_depth)
		reg_val |= OPL3_VIBRATO_DEPTH;
	/* Set percussion mode */
	if (params->rhythm) {
		reg_val |= OPL3_PERCUSSION_ENABLE;
		opl3->rhythm = 1;
	} else {
		opl3->rhythm = 0;
	}
	/* Play percussion instruments */
	if (params->bass)
		reg_val |= OPL3_BASSDRUM_ON;
	if (params->snare)
		reg_val |= OPL3_SNAREDRUM_ON;
	if (params->tomtom)
		reg_val |= OPL3_TOMTOM_ON;
	if (params->cymbal)
		reg_val |= OPL3_CYMBAL_ON;
	if (params->hihat)
		reg_val |= OPL3_HIHAT_ON;

	opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
	return 0;
}

static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
{
	if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
		return -EINVAL;

	opl3->fm_mode = mode;
	if (opl3->hardware >= OPL3_HW_OPL3)
		opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00);	/* Clear 4-op connections */

	return 0;
}

static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
{
	unsigned char reg_val;

	/* OPL-3 only */
	if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
		return -EINVAL;

	reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
				OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
	/* Set 4-op connections */
	opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);

	return 0;
}