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RT-AC66 3.0.0.4.374.130 core
[tomato.git] / release / src-rt-6.x / linux / linux-2.6 / sound / drivers / opl3 / opl3_midi.c
blob1b6f227af370b0428fd707df46a6b7b21cafc914
1 /*
2 * Copyright (c) by Uros Bizjak <uros@kss-loka.si>
3 *
4 * Midi synth routines for OPL2/OPL3/OPL4 FM
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 #undef DEBUG_ALLOC
23 #undef DEBUG_MIDI
24
25 #include "opl3_voice.h"
26 #include <sound/asoundef.h>
27
28 extern char snd_opl3_regmap[MAX_OPL2_VOICES][4];
29
30 extern int use_internal_drums;
31
32 /*
33 * The next table looks magical, but it certainly is not. Its values have
34 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
35 * for i=0. This log-table converts a linear volume-scaling (0..127) to a
36 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume
37 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
38 * volume -8 it was implemented as a table because it is only 128 bytes and
39 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>)
40 */
41
42 static char opl3_volume_table[128] =
43 {
44 -63, -48, -40, -35, -32, -29, -27, -26,
45 -24, -23, -21, -20, -19, -18, -18, -17,
46 -16, -15, -15, -14, -13, -13, -12, -12,
47 -11, -11, -10, -10, -10, -9, -9, -8,
48 -8, -8, -7, -7, -7, -6, -6, -6,
49 -5, -5, -5, -5, -4, -4, -4, -4,
50 -3, -3, -3, -3, -2, -2, -2, -2,
51 -2, -1, -1, -1, -1, 0, 0, 0,
52 0, 0, 0, 1, 1, 1, 1, 1,
53 1, 2, 2, 2, 2, 2, 2, 2,
54 3, 3, 3, 3, 3, 3, 3, 4,
55 4, 4, 4, 4, 4, 4, 4, 5,
56 5, 5, 5, 5, 5, 5, 5, 5,
57 6, 6, 6, 6, 6, 6, 6, 6,
58 6, 7, 7, 7, 7, 7, 7, 7,
59 7, 7, 7, 8, 8, 8, 8, 8
60 };
61
62 void snd_opl3_calc_volume(unsigned char *volbyte, int vel,
63 struct snd_midi_channel *chan)
64 {
65 int oldvol, newvol, n;
66 int volume;
67
68 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127);
69 if (volume > 127)
70 volume = 127;
71
72 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK);
73
74 newvol = opl3_volume_table[volume] + oldvol;
75 if (newvol > OPL3_TOTAL_LEVEL_MASK)
76 newvol = OPL3_TOTAL_LEVEL_MASK;
77 else if (newvol < 0)
78 newvol = 0;
79
80 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK);
81
82 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK);
83 }
84
85 /*
86 * Converts the note frequency to block and fnum values for the FM chip
87 */
88 static short opl3_note_table[16] =
89 {
90 305, 323, /* for pitch bending, -2 semitones */
91 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647,
92 686, 726 /* for pitch bending, +2 semitones */
93 };
94
95 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum,
96 int note, struct snd_midi_channel *chan)
97 {
98 int block = ((note / 12) & 0x07) - 1;
99 int idx = (note % 12) + 2;
100 int freq;
101
102 if (chan->midi_pitchbend) {
103 int pitchbend = chan->midi_pitchbend;
104 int segment;
105
106 if (pitchbend > 0x1FFF)
107 pitchbend = 0x1FFF;
108
109 segment = pitchbend / 0x1000;
110 freq = opl3_note_table[idx+segment];
111 freq += ((opl3_note_table[idx+segment+1] - freq) *
112 (pitchbend % 0x1000)) / 0x1000;
113 } else {
114 freq = opl3_note_table[idx];
115 }
116
117 *fnum = (unsigned char) freq;
118 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) |
119 ((block << 2) & OPL3_BLOCKNUM_MASK);
120 }
121
122
123 #ifdef DEBUG_ALLOC
124 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) {
125 int i;
126 char *str = "x.24";
127
128 printk("time %.5i: %s [%.2i]: ", opl3->use_time, s, voice);
129 for (i = 0; i < opl3->max_voices; i++)
130 printk("%c", *(str + opl3->voices[i].state + 1));
131 printk("\n");
132 }
133 #endif
134
135 /*
136 * Get a FM voice (channel) to play a note on.
137 */
138 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op,
139 struct snd_midi_channel *chan) {
140 int chan_4op_1; /* first voice for 4op instrument */
141 int chan_4op_2; /* second voice for 4op instrument */
142
143 struct snd_opl3_voice *vp, *vp2;
144 unsigned int voice_time;
145 int i;
146
147 #ifdef DEBUG_ALLOC
148 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" };
149 #endif
150
151 /* This is our "allocation cost" table */
152 enum {
153 FREE = 0, CHEAP, EXPENSIVE, END
154 };
155
156 /* Keeps track of what we are finding */
157 struct best {
158 unsigned int time;
159 int voice;
160 } best[END];
161 struct best *bp;
162
163 for (i = 0; i < END; i++) {
164 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */;
165 best[i].voice = -1;
166 }
167
168 /* Look through all the channels for the most suitable. */
169 for (i = 0; i < opl3->max_voices; i++) {
170 vp = &opl3->voices[i];
171
172 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL)
173 /* skip unavailable channels, allocated by
174 drum voices or by bounded 4op voices) */
175 continue;
176
177 voice_time = vp->time;
178 bp = best;
179
180 chan_4op_1 = ((i < 3) || (i > 8 && i < 12));
181 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15));
182 if (instr_4op) {
183 /* allocate 4op voice */
184 /* skip channels unavailable to 4op instrument */
185 if (!chan_4op_1)
186 continue;
187
188 if (vp->state)
189 /* kill one voice, CHEAP */
190 bp++;
191 /* get state of bounded 2op channel
192 to be allocated for 4op instrument */
193 vp2 = &opl3->voices[i + 3];
194 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) {
195 /* kill two voices, EXPENSIVE */
196 bp++;
197 voice_time = (voice_time > vp->time) ?
198 voice_time : vp->time;
199 }
200 } else {
201 /* allocate 2op voice */
202 if ((chan_4op_1) || (chan_4op_2))
203 /* use bounded channels for 2op, CHEAP */
204 bp++;
205 else if (vp->state)
206 /* kill one voice on 2op channel, CHEAP */
207 bp++;
208 /* raise kill cost to EXPENSIVE for all channels */
209 if (vp->state)
210 bp++;
211 }
212 if (voice_time < bp->time) {
213 bp->time = voice_time;
214 bp->voice = i;
215 }
216 }
217
218 for (i = 0; i < END; i++) {
219 if (best[i].voice >= 0) {
220 #ifdef DEBUG_ALLOC
221 printk("%s %iop allocation on voice %i\n",
222 alloc_type[i], instr_4op ? 4 : 2,
223 best[i].voice);
224 #endif
225 return best[i].voice;
226 }
227 }
228 /* not found */
229 return -1;
230 }
231
232 /* ------------------------------ */
233
234 /*
235 * System timer interrupt function
236 */
237 void snd_opl3_timer_func(unsigned long data)
238 {
239
240 struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
241 unsigned long flags;
242 int again = 0;
243 int i;
244
245 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
246 for (i = 0; i < opl3->max_voices; i++) {
247 struct snd_opl3_voice *vp = &opl3->voices[i];
248 if (vp->state > 0 && vp->note_off_check) {
249 if (vp->note_off == jiffies)
250 snd_opl3_note_off(opl3, vp->note, 0, vp->chan);
251 else
252 again++;
253 }
254 }
255 if (again) {
256 opl3->tlist.expires = jiffies + 1; /* invoke again */
257 add_timer(&opl3->tlist);
258 } else {
259 opl3->sys_timer_status = 0;
260 }
261 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
262 }
263
264 /*
265 * Start system timer
266 */
267 static void snd_opl3_start_timer(struct snd_opl3 *opl3)
268 {
269 unsigned long flags;
270 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
271 if (! opl3->sys_timer_status) {
272 opl3->tlist.expires = jiffies + 1;
273 add_timer(&opl3->tlist);
274 opl3->sys_timer_status = 1;
275 }
276 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
277 }
278
279 /* ------------------------------ */
280
281
282 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = {
283 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14
284 };
285
286 /*
287 * Start a note.
288 */
289 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
290 {
291 struct snd_opl3 *opl3;
292 struct snd_seq_instr wanted;
293 struct snd_seq_kinstr *kinstr;
294 int instr_4op;
295
296 int voice;
297 struct snd_opl3_voice *vp, *vp2;
298 unsigned short connect_mask;
299 unsigned char connection;
300 unsigned char vol_op[4];
301
302 int extra_prg = 0;
303
304 unsigned short reg_side;
305 unsigned char op_offset;
306 unsigned char voice_offset;
307 unsigned short opl3_reg;
308 unsigned char reg_val;
309
310 int key = note;
311 unsigned char fnum, blocknum;
312 int i;
313
314 struct fm_instrument *fm;
315 unsigned long flags;
316
317 opl3 = p;
318
319 #ifdef DEBUG_MIDI
320 snd_printk("Note on, ch %i, inst %i, note %i, vel %i\n",
321 chan->number, chan->midi_program, note, vel);
322 #endif
323 wanted.cluster = 0;
324 wanted.std = SNDRV_SEQ_INSTR_TYPE2_OPL2_3;
325
326 /* in SYNTH mode, application takes care of voices */
327 /* in SEQ mode, drum voice numbers are notes on drum channel */
328 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
329 if (chan->drum_channel) {
330 /* percussion instruments are located in bank 128 */
331 wanted.bank = 128;
332 wanted.prg = note;
333 } else {
334 wanted.bank = chan->gm_bank_select;
335 wanted.prg = chan->midi_program;
336 }
337 } else {
338 /* Prepare for OSS mode */
339 if (chan->number >= MAX_OPL3_VOICES)
340 return;
341
342 /* OSS instruments are located in bank 127 */
343 wanted.bank = 127;
344 wanted.prg = chan->midi_program;
345 }
346
347 spin_lock_irqsave(&opl3->voice_lock, flags);
348
349 if (use_internal_drums) {
350 snd_opl3_drum_switch(opl3, note, vel, 1, chan);
351 spin_unlock_irqrestore(&opl3->voice_lock, flags);
352 return;
353 }
354
355 __extra_prg:
356 kinstr = snd_seq_instr_find(opl3->ilist, &wanted, 1, 0);
357 if (kinstr == NULL) {
358 spin_unlock_irqrestore(&opl3->voice_lock, flags);
359 return;
360 }
361
362 fm = KINSTR_DATA(kinstr);
363
364 switch (fm->type) {
365 case FM_PATCH_OPL2:
366 instr_4op = 0;
367 break;
368 case FM_PATCH_OPL3:
369 if (opl3->hardware >= OPL3_HW_OPL3) {
370 instr_4op = 1;
371 break;
372 }
373 default:
374 snd_seq_instr_free_use(opl3->ilist, kinstr);
375 spin_unlock_irqrestore(&opl3->voice_lock, flags);
376 return;
377 }
378
379 #ifdef DEBUG_MIDI
380 snd_printk(" --> OPL%i instrument: %s\n",
381 instr_4op ? 3 : 2, kinstr->name);
382 #endif
383 /* in SYNTH mode, application takes care of voices */
384 /* in SEQ mode, allocate voice on free OPL3 channel */
385 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
386 voice = opl3_get_voice(opl3, instr_4op, chan);
387 } else {
388 /* remap OSS voice */
389 voice = snd_opl3_oss_map[chan->number];
390 }
391
392 if (voice < MAX_OPL2_VOICES) {
393 /* Left register block for voices 0 .. 8 */
394 reg_side = OPL3_LEFT;
395 voice_offset = voice;
396 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07;
397 } else {
398 /* Right register block for voices 9 .. 17 */
399 reg_side = OPL3_RIGHT;
400 voice_offset = voice - MAX_OPL2_VOICES;
401 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38;
402 }
403
404 /* kill voice on channel */
405 vp = &opl3->voices[voice];
406 if (vp->state > 0) {
407 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
408 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
409 opl3->command(opl3, opl3_reg, reg_val);
410 }
411 if (instr_4op) {
412 vp2 = &opl3->voices[voice + 3];
413 if (vp->state > 0) {
414 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
415 voice_offset + 3);
416 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
417 opl3->command(opl3, opl3_reg, reg_val);
418 }
419 }
420
421 /* set connection register */
422 if (instr_4op) {
423 if ((opl3->connection_reg ^ connect_mask) & connect_mask) {
424 opl3->connection_reg |= connect_mask;
425 /* set connection bit */
426 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
427 opl3->command(opl3, opl3_reg, opl3->connection_reg);
428 }
429 } else {
430 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) {
431 opl3->connection_reg &= ~connect_mask;
432 /* clear connection bit */
433 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
434 opl3->command(opl3, opl3_reg, opl3->connection_reg);
435 }
436 }
437
438 #ifdef DEBUG_MIDI
439 snd_printk(" --> setting OPL3 connection: 0x%x\n",
440 opl3->connection_reg);
441 #endif
442 /*
443 * calculate volume depending on connection
444 * between FM operators (see include/opl3.h)
445 */
446 for (i = 0; i < (instr_4op ? 4 : 2); i++)
447 vol_op[i] = fm->op[i].ksl_level;
448
449 connection = fm->feedback_connection[0] & 0x01;
450 if (instr_4op) {
451 connection <<= 1;
452 connection |= fm->feedback_connection[1] & 0x01;
453
454 snd_opl3_calc_volume(&vol_op[3], vel, chan);
455 switch (connection) {
456 case 0x03:
457 snd_opl3_calc_volume(&vol_op[2], vel, chan);
458 /* fallthru */
459 case 0x02:
460 snd_opl3_calc_volume(&vol_op[0], vel, chan);
461 break;
462 case 0x01:
463 snd_opl3_calc_volume(&vol_op[1], vel, chan);
464 }
465 } else {
466 snd_opl3_calc_volume(&vol_op[1], vel, chan);
467 if (connection)
468 snd_opl3_calc_volume(&vol_op[0], vel, chan);
469 }
470
471 /* Program the FM voice characteristics */
472 for (i = 0; i < (instr_4op ? 4 : 2); i++) {
473 #ifdef DEBUG_MIDI
474 snd_printk(" --> programming operator %i\n", i);
475 #endif
476 op_offset = snd_opl3_regmap[voice_offset][i];
477
478 /* Set OPL3 AM_VIB register of requested voice/operator */
479 reg_val = fm->op[i].am_vib;
480 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
481 opl3->command(opl3, opl3_reg, reg_val);
482
483 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
484 reg_val = vol_op[i];
485 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
486 opl3->command(opl3, opl3_reg, reg_val);
487
488 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
489 reg_val = fm->op[i].attack_decay;
490 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
491 opl3->command(opl3, opl3_reg, reg_val);
492
493 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
494 reg_val = fm->op[i].sustain_release;
495 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
496 opl3->command(opl3, opl3_reg, reg_val);
497
498 /* Select waveform */
499 reg_val = fm->op[i].wave_select;
500 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
501 opl3->command(opl3, opl3_reg, reg_val);
502 }
503
504 /* Set operator feedback and 2op inter-operator connection */
505 reg_val = fm->feedback_connection[0];
506 /* Set output voice connection */
507 reg_val |= OPL3_STEREO_BITS;
508 if (chan->gm_pan < 43)
509 reg_val &= ~OPL3_VOICE_TO_RIGHT;
510 if (chan->gm_pan > 85)
511 reg_val &= ~OPL3_VOICE_TO_LEFT;
512 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
513 opl3->command(opl3, opl3_reg, reg_val);
514
515 if (instr_4op) {
516 /* Set 4op inter-operator connection */
517 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT;
518 /* Set output voice connection */
519 reg_val |= OPL3_STEREO_BITS;
520 if (chan->gm_pan < 43)
521 reg_val &= ~OPL3_VOICE_TO_RIGHT;
522 if (chan->gm_pan > 85)
523 reg_val &= ~OPL3_VOICE_TO_LEFT;
524 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION +
525 voice_offset + 3);
526 opl3->command(opl3, opl3_reg, reg_val);
527 }
528
529 /*
530 * Special treatment of percussion notes for fm:
531 * Requested pitch is really program, and pitch for
532 * device is whatever was specified in the patch library.
533 */
534 if (fm->fix_key)
535 note = fm->fix_key;
536 /*
537 * use transpose if defined in patch library
538 */
539 if (fm->trnsps)
540 note += (fm->trnsps - 64);
541
542 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan);
543
544 /* Set OPL3 FNUM_LOW register of requested voice */
545 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
546 opl3->command(opl3, opl3_reg, fnum);
547
548 opl3->voices[voice].keyon_reg = blocknum;
549
550 /* Set output sound flag */
551 blocknum |= OPL3_KEYON_BIT;
552
553 #ifdef DEBUG_MIDI
554 snd_printk(" --> trigger voice %i\n", voice);
555 #endif
556 /* Set OPL3 KEYON_BLOCK register of requested voice */
557 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
558 opl3->command(opl3, opl3_reg, blocknum);
559
560 /* kill note after fixed duration (in centiseconds) */
561 if (fm->fix_dur) {
562 opl3->voices[voice].note_off = jiffies +
563 (fm->fix_dur * HZ) / 100;
564 snd_opl3_start_timer(opl3);
565 opl3->voices[voice].note_off_check = 1;
566 } else
567 opl3->voices[voice].note_off_check = 0;
568
569 /* get extra pgm, but avoid possible loops */
570 extra_prg = (extra_prg) ? 0 : fm->modes;
571
572 snd_seq_instr_free_use(opl3->ilist, kinstr);
573
574 /* do the bookkeeping */
575 vp->time = opl3->use_time++;
576 vp->note = key;
577 vp->chan = chan;
578
579 if (instr_4op) {
580 vp->state = SNDRV_OPL3_ST_ON_4OP;
581
582 vp2 = &opl3->voices[voice + 3];
583 vp2->time = opl3->use_time++;
584 vp2->note = key;
585 vp2->chan = chan;
586 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL;
587 } else {
588 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
589 /* 4op killed by 2op, release bounded voice */
590 vp2 = &opl3->voices[voice + 3];
591 vp2->time = opl3->use_time++;
592 vp2->state = SNDRV_OPL3_ST_OFF;
593 }
594 vp->state = SNDRV_OPL3_ST_ON_2OP;
595 }
596
597 #ifdef DEBUG_ALLOC
598 debug_alloc(opl3, "note on ", voice);
599 #endif
600
601 /* allocate extra program if specified in patch library */
602 if (extra_prg) {
603 if (extra_prg > 128) {
604 wanted.bank = 128;
605 /* percussions start at 35 */
606 wanted.prg = extra_prg - 128 + 35 - 1;
607 } else {
608 wanted.bank = 0;
609 wanted.prg = extra_prg - 1;
610 }
611 #ifdef DEBUG_MIDI
612 snd_printk(" *** allocating extra program\n");
613 #endif
614 goto __extra_prg;
615 }
616 spin_unlock_irqrestore(&opl3->voice_lock, flags);
617 }
618
619 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice)
620 {
621 unsigned short reg_side;
622 unsigned char voice_offset;
623 unsigned short opl3_reg;
624
625 struct snd_opl3_voice *vp, *vp2;
626
627 snd_assert(voice < MAX_OPL3_VOICES, return);
628
629 vp = &opl3->voices[voice];
630 if (voice < MAX_OPL2_VOICES) {
631 /* Left register block for voices 0 .. 8 */
632 reg_side = OPL3_LEFT;
633 voice_offset = voice;
634 } else {
635 /* Right register block for voices 9 .. 17 */
636 reg_side = OPL3_RIGHT;
637 voice_offset = voice - MAX_OPL2_VOICES;
638 }
639
640 /* kill voice */
641 #ifdef DEBUG_MIDI
642 snd_printk(" --> kill voice %i\n", voice);
643 #endif
644 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
645 /* clear Key ON bit */
646 opl3->command(opl3, opl3_reg, vp->keyon_reg);
647
648 /* do the bookkeeping */
649 vp->time = opl3->use_time++;
650
651 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
652 vp2 = &opl3->voices[voice + 3];
653
654 vp2->time = opl3->use_time++;
655 vp2->state = SNDRV_OPL3_ST_OFF;
656 }
657 vp->state = SNDRV_OPL3_ST_OFF;
658 #ifdef DEBUG_ALLOC
659 debug_alloc(opl3, "note off", voice);
660 #endif
661
662 }
663
664 /*
665 * Release a note in response to a midi note off.
666 */
667 void snd_opl3_note_off(void *p, int note, int vel, struct snd_midi_channel *chan)
668 {
669 struct snd_opl3 *opl3;
670
671 int voice;
672 struct snd_opl3_voice *vp;
673
674 unsigned long flags;
675
676 opl3 = p;
677
678 #ifdef DEBUG_MIDI
679 snd_printk("Note off, ch %i, inst %i, note %i\n",
680 chan->number, chan->midi_program, note);
681 #endif
682
683 spin_lock_irqsave(&opl3->voice_lock, flags);
684
685 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
686 if (chan->drum_channel && use_internal_drums) {
687 snd_opl3_drum_switch(opl3, note, vel, 0, chan);
688 spin_unlock_irqrestore(&opl3->voice_lock, flags);
689 return;
690 }
691 /* this loop will hopefully kill all extra voices, because
692 they are grouped by the same channel and note values */
693 for (voice = 0; voice < opl3->max_voices; voice++) {
694 vp = &opl3->voices[voice];
695 if (vp->state > 0 && vp->chan == chan && vp->note == note) {
696 snd_opl3_kill_voice(opl3, voice);
697 }
698 }
699 } else {
700 /* remap OSS voices */
701 if (chan->number < MAX_OPL3_VOICES) {
702 voice = snd_opl3_oss_map[chan->number];
703 snd_opl3_kill_voice(opl3, voice);
704 }
705 }
706 spin_unlock_irqrestore(&opl3->voice_lock, flags);
707 }
708
709 /*
710 * key pressure change
711 */
712 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
713 {
714 struct snd_opl3 *opl3;
715
716 opl3 = p;
717 #ifdef DEBUG_MIDI
718 snd_printk("Key pressure, ch#: %i, inst#: %i\n",
719 chan->number, chan->midi_program);
720 #endif
721 }
722
723 /*
724 * terminate note
725 */
726 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan)
727 {
728 struct snd_opl3 *opl3;
729
730 opl3 = p;
731 #ifdef DEBUG_MIDI
732 snd_printk("Terminate note, ch#: %i, inst#: %i\n",
733 chan->number, chan->midi_program);
734 #endif
735 }
736
737 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice)
738 {
739 unsigned short reg_side;
740 unsigned char voice_offset;
741 unsigned short opl3_reg;
742
743 unsigned char fnum, blocknum;
744
745 struct snd_opl3_voice *vp;
746
747 snd_assert(voice < MAX_OPL3_VOICES, return);
748
749 vp = &opl3->voices[voice];
750 if (vp->chan == NULL)
751 return; /* not allocated? */
752
753 if (voice < MAX_OPL2_VOICES) {
754 /* Left register block for voices 0 .. 8 */
755 reg_side = OPL3_LEFT;
756 voice_offset = voice;
757 } else {
758 /* Right register block for voices 9 .. 17 */
759 reg_side = OPL3_RIGHT;
760 voice_offset = voice - MAX_OPL2_VOICES;
761 }
762
763 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan);
764
765 /* Set OPL3 FNUM_LOW register of requested voice */
766 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
767 opl3->command(opl3, opl3_reg, fnum);
768
769 vp->keyon_reg = blocknum;
770
771 /* Set output sound flag */
772 blocknum |= OPL3_KEYON_BIT;
773
774 /* Set OPL3 KEYON_BLOCK register of requested voice */
775 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
776 opl3->command(opl3, opl3_reg, blocknum);
777
778 vp->time = opl3->use_time++;
779 }
780
781 /*
782 * Update voice pitch controller
783 */
784 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan)
785 {
786 int voice;
787 struct snd_opl3_voice *vp;
788
789 unsigned long flags;
790
791 spin_lock_irqsave(&opl3->voice_lock, flags);
792
793 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
794 for (voice = 0; voice < opl3->max_voices; voice++) {
795 vp = &opl3->voices[voice];
796 if (vp->state > 0 && vp->chan == chan) {
797 snd_opl3_update_pitch(opl3, voice);
798 }
799 }
800 } else {
801 /* remap OSS voices */
802 if (chan->number < MAX_OPL3_VOICES) {
803 voice = snd_opl3_oss_map[chan->number];
804 snd_opl3_update_pitch(opl3, voice);
805 }
806 }
807 spin_unlock_irqrestore(&opl3->voice_lock, flags);
808 }
809
810 /*
811 * Deal with a controler type event. This includes all types of
812 * control events, not just the midi controllers
813 */
814 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan)
815 {
816 struct snd_opl3 *opl3;
817
818 opl3 = p;
819 #ifdef DEBUG_MIDI
820 snd_printk("Controller, TYPE = %i, ch#: %i, inst#: %i\n",
821 type, chan->number, chan->midi_program);
822 #endif
823
824 switch (type) {
825 case MIDI_CTL_MSB_MODWHEEL:
826 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63)
827 opl3->drum_reg |= OPL3_VIBRATO_DEPTH;
828 else
829 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH;
830 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
831 opl3->drum_reg);
832 break;
833 case MIDI_CTL_E2_TREMOLO_DEPTH:
834 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63)
835 opl3->drum_reg |= OPL3_TREMOLO_DEPTH;
836 else
837 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH;
838 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
839 opl3->drum_reg);
840 break;
841 case MIDI_CTL_PITCHBEND:
842 snd_opl3_pitch_ctrl(opl3, chan);
843 break;
844 }
845 }
846
847 /*
848 * NRPN events
849 */
850 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan,
851 struct snd_midi_channel_set *chset)
852 {
853 struct snd_opl3 *opl3;
854
855 opl3 = p;
856 #ifdef DEBUG_MIDI
857 snd_printk("NRPN, ch#: %i, inst#: %i\n",
858 chan->number, chan->midi_program);
859 #endif
860 }
861
862 /*
863 * receive sysex
864 */
865 void snd_opl3_sysex(void *p, unsigned char *buf, int len,
866 int parsed, struct snd_midi_channel_set *chset)
867 {
868 struct snd_opl3 *opl3;
869
870 opl3 = p;
871 #ifdef DEBUG_MIDI
872 snd_printk("SYSEX\n");
873 #endif
874 }
Tomato firmware and modifications.