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Merge tag 'gpio-v3.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
[linux-2.6.git] / sound / drivers / opl3 / opl3_midi.c
blob6c6d09a51f42838dc19d98dc63836f53839b5d2a
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 bool use_internal_drums;
31
32 static void snd_opl3_note_off_unsafe(void *p, int note, int vel,
33 struct snd_midi_channel *chan);
34 /*
35 * The next table looks magical, but it certainly is not. Its values have
36 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
37 * for i=0. This log-table converts a linear volume-scaling (0..127) to a
38 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume
39 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative
40 * volume -8 it was implemented as a table because it is only 128 bytes and
41 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>)
42 */
43
44 static char opl3_volume_table[128] =
45 {
46 -63, -48, -40, -35, -32, -29, -27, -26,
47 -24, -23, -21, -20, -19, -18, -18, -17,
48 -16, -15, -15, -14, -13, -13, -12, -12,
49 -11, -11, -10, -10, -10, -9, -9, -8,
50 -8, -8, -7, -7, -7, -6, -6, -6,
51 -5, -5, -5, -5, -4, -4, -4, -4,
52 -3, -3, -3, -3, -2, -2, -2, -2,
53 -2, -1, -1, -1, -1, 0, 0, 0,
54 0, 0, 0, 1, 1, 1, 1, 1,
55 1, 2, 2, 2, 2, 2, 2, 2,
56 3, 3, 3, 3, 3, 3, 3, 4,
57 4, 4, 4, 4, 4, 4, 4, 5,
58 5, 5, 5, 5, 5, 5, 5, 5,
59 6, 6, 6, 6, 6, 6, 6, 6,
60 6, 7, 7, 7, 7, 7, 7, 7,
61 7, 7, 7, 8, 8, 8, 8, 8
62 };
63
64 void snd_opl3_calc_volume(unsigned char *volbyte, int vel,
65 struct snd_midi_channel *chan)
66 {
67 int oldvol, newvol, n;
68 int volume;
69
70 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127);
71 if (volume > 127)
72 volume = 127;
73
74 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK);
75
76 newvol = opl3_volume_table[volume] + oldvol;
77 if (newvol > OPL3_TOTAL_LEVEL_MASK)
78 newvol = OPL3_TOTAL_LEVEL_MASK;
79 else if (newvol < 0)
80 newvol = 0;
81
82 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK);
83
84 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK);
85 }
86
87 /*
88 * Converts the note frequency to block and fnum values for the FM chip
89 */
90 static short opl3_note_table[16] =
91 {
92 305, 323, /* for pitch bending, -2 semitones */
93 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647,
94 686, 726 /* for pitch bending, +2 semitones */
95 };
96
97 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum,
98 int note, struct snd_midi_channel *chan)
99 {
100 int block = ((note / 12) & 0x07) - 1;
101 int idx = (note % 12) + 2;
102 int freq;
103
104 if (chan->midi_pitchbend) {
105 int pitchbend = chan->midi_pitchbend;
106 int segment;
107
108 if (pitchbend > 0x1FFF)
109 pitchbend = 0x1FFF;
110
111 segment = pitchbend / 0x1000;
112 freq = opl3_note_table[idx+segment];
113 freq += ((opl3_note_table[idx+segment+1] - freq) *
114 (pitchbend % 0x1000)) / 0x1000;
115 } else {
116 freq = opl3_note_table[idx];
117 }
118
119 *fnum = (unsigned char) freq;
120 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) |
121 ((block << 2) & OPL3_BLOCKNUM_MASK);
122 }
123
124
125 #ifdef DEBUG_ALLOC
126 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) {
127 int i;
128 char *str = "x.24";
129
130 printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice);
131 for (i = 0; i < opl3->max_voices; i++)
132 printk("%c", *(str + opl3->voices[i].state + 1));
133 printk("\n");
134 }
135 #endif
136
137 /*
138 * Get a FM voice (channel) to play a note on.
139 */
140 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op,
141 struct snd_midi_channel *chan) {
142 int chan_4op_1; /* first voice for 4op instrument */
143 int chan_4op_2; /* second voice for 4op instrument */
144
145 struct snd_opl3_voice *vp, *vp2;
146 unsigned int voice_time;
147 int i;
148
149 #ifdef DEBUG_ALLOC
150 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" };
151 #endif
152
153 /* This is our "allocation cost" table */
154 enum {
155 FREE = 0, CHEAP, EXPENSIVE, END
156 };
157
158 /* Keeps track of what we are finding */
159 struct best {
160 unsigned int time;
161 int voice;
162 } best[END];
163 struct best *bp;
164
165 for (i = 0; i < END; i++) {
166 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */
167 best[i].voice = -1;
168 }
169
170 /* Look through all the channels for the most suitable. */
171 for (i = 0; i < opl3->max_voices; i++) {
172 vp = &opl3->voices[i];
173
174 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL)
175 /* skip unavailable channels, allocated by
176 drum voices or by bounded 4op voices) */
177 continue;
178
179 voice_time = vp->time;
180 bp = best;
181
182 chan_4op_1 = ((i < 3) || (i > 8 && i < 12));
183 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15));
184 if (instr_4op) {
185 /* allocate 4op voice */
186 /* skip channels unavailable to 4op instrument */
187 if (!chan_4op_1)
188 continue;
189
190 if (vp->state)
191 /* kill one voice, CHEAP */
192 bp++;
193 /* get state of bounded 2op channel
194 to be allocated for 4op instrument */
195 vp2 = &opl3->voices[i + 3];
196 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) {
197 /* kill two voices, EXPENSIVE */
198 bp++;
199 voice_time = (voice_time > vp->time) ?
200 voice_time : vp->time;
201 }
202 } else {
203 /* allocate 2op voice */
204 if ((chan_4op_1) || (chan_4op_2))
205 /* use bounded channels for 2op, CHEAP */
206 bp++;
207 else if (vp->state)
208 /* kill one voice on 2op channel, CHEAP */
209 bp++;
210 /* raise kill cost to EXPENSIVE for all channels */
211 if (vp->state)
212 bp++;
213 }
214 if (voice_time < bp->time) {
215 bp->time = voice_time;
216 bp->voice = i;
217 }
218 }
219
220 for (i = 0; i < END; i++) {
221 if (best[i].voice >= 0) {
222 #ifdef DEBUG_ALLOC
223 printk(KERN_DEBUG "%s %iop allocation on voice %i\n",
224 alloc_type[i], instr_4op ? 4 : 2,
225 best[i].voice);
226 #endif
227 return best[i].voice;
228 }
229 }
230 /* not found */
231 return -1;
232 }
233
234 /* ------------------------------ */
235
236 /*
237 * System timer interrupt function
238 */
239 void snd_opl3_timer_func(unsigned long data)
240 {
241
242 struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
243 unsigned long flags;
244 int again = 0;
245 int i;
246
247 spin_lock_irqsave(&opl3->voice_lock, flags);
248 for (i = 0; i < opl3->max_voices; i++) {
249 struct snd_opl3_voice *vp = &opl3->voices[i];
250 if (vp->state > 0 && vp->note_off_check) {
251 if (vp->note_off == jiffies)
252 snd_opl3_note_off_unsafe(opl3, vp->note, 0,
253 vp->chan);
254 else
255 again++;
256 }
257 }
258 spin_unlock_irqrestore(&opl3->voice_lock, flags);
259
260 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
261 if (again) {
262 opl3->tlist.expires = jiffies + 1; /* invoke again */
263 add_timer(&opl3->tlist);
264 } else {
265 opl3->sys_timer_status = 0;
266 }
267 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
268 }
269
270 /*
271 * Start system timer
272 */
273 static void snd_opl3_start_timer(struct snd_opl3 *opl3)
274 {
275 unsigned long flags;
276 spin_lock_irqsave(&opl3->sys_timer_lock, flags);
277 if (! opl3->sys_timer_status) {
278 opl3->tlist.expires = jiffies + 1;
279 add_timer(&opl3->tlist);
280 opl3->sys_timer_status = 1;
281 }
282 spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
283 }
284
285 /* ------------------------------ */
286
287
288 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = {
289 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14
290 };
291
292 /*
293 * Start a note.
294 */
295 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
296 {
297 struct snd_opl3 *opl3;
298 int instr_4op;
299
300 int voice;
301 struct snd_opl3_voice *vp, *vp2;
302 unsigned short connect_mask;
303 unsigned char connection;
304 unsigned char vol_op[4];
305
306 int extra_prg = 0;
307
308 unsigned short reg_side;
309 unsigned char op_offset;
310 unsigned char voice_offset;
311 unsigned short opl3_reg;
312 unsigned char reg_val;
313 unsigned char prg, bank;
314
315 int key = note;
316 unsigned char fnum, blocknum;
317 int i;
318
319 struct fm_patch *patch;
320 struct fm_instrument *fm;
321 unsigned long flags;
322
323 opl3 = p;
324
325 #ifdef DEBUG_MIDI
326 snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n",
327 chan->number, chan->midi_program, note, vel);
328 #endif
329
330 /* in SYNTH mode, application takes care of voices */
331 /* in SEQ mode, drum voice numbers are notes on drum channel */
332 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
333 if (chan->drum_channel) {
334 /* percussion instruments are located in bank 128 */
335 bank = 128;
336 prg = note;
337 } else {
338 bank = chan->gm_bank_select;
339 prg = chan->midi_program;
340 }
341 } else {
342 /* Prepare for OSS mode */
343 if (chan->number >= MAX_OPL3_VOICES)
344 return;
345
346 /* OSS instruments are located in bank 127 */
347 bank = 127;
348 prg = chan->midi_program;
349 }
350
351 spin_lock_irqsave(&opl3->voice_lock, flags);
352
353 if (use_internal_drums) {
354 snd_opl3_drum_switch(opl3, note, vel, 1, chan);
355 spin_unlock_irqrestore(&opl3->voice_lock, flags);
356 return;
357 }
358
359 __extra_prg:
360 patch = snd_opl3_find_patch(opl3, prg, bank, 0);
361 if (!patch) {
362 spin_unlock_irqrestore(&opl3->voice_lock, flags);
363 return;
364 }
365
366 fm = &patch->inst;
367 switch (patch->type) {
368 case FM_PATCH_OPL2:
369 instr_4op = 0;
370 break;
371 case FM_PATCH_OPL3:
372 if (opl3->hardware >= OPL3_HW_OPL3) {
373 instr_4op = 1;
374 break;
375 }
376 default:
377 spin_unlock_irqrestore(&opl3->voice_lock, flags);
378 return;
379 }
380 #ifdef DEBUG_MIDI
381 snd_printk(KERN_DEBUG " --> OPL%i instrument: %s\n",
382 instr_4op ? 3 : 2, patch->name);
383 #endif
384 /* in SYNTH mode, application takes care of voices */
385 /* in SEQ mode, allocate voice on free OPL3 channel */
386 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
387 voice = opl3_get_voice(opl3, instr_4op, chan);
388 } else {
389 /* remap OSS voice */
390 voice = snd_opl3_oss_map[chan->number];
391 }
392
393 if (voice < 0) {
394 spin_unlock_irqrestore(&opl3->voice_lock, flags);
395 return;
396 }
397
398 if (voice < MAX_OPL2_VOICES) {
399 /* Left register block for voices 0 .. 8 */
400 reg_side = OPL3_LEFT;
401 voice_offset = voice;
402 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07;
403 } else {
404 /* Right register block for voices 9 .. 17 */
405 reg_side = OPL3_RIGHT;
406 voice_offset = voice - MAX_OPL2_VOICES;
407 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38;
408 }
409
410 /* kill voice on channel */
411 vp = &opl3->voices[voice];
412 if (vp->state > 0) {
413 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
414 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
415 opl3->command(opl3, opl3_reg, reg_val);
416 }
417 if (instr_4op) {
418 vp2 = &opl3->voices[voice + 3];
419 if (vp->state > 0) {
420 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
421 voice_offset + 3);
422 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
423 opl3->command(opl3, opl3_reg, reg_val);
424 }
425 }
426
427 /* set connection register */
428 if (instr_4op) {
429 if ((opl3->connection_reg ^ connect_mask) & connect_mask) {
430 opl3->connection_reg |= connect_mask;
431 /* set connection bit */
432 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
433 opl3->command(opl3, opl3_reg, opl3->connection_reg);
434 }
435 } else {
436 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) {
437 opl3->connection_reg &= ~connect_mask;
438 /* clear connection bit */
439 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
440 opl3->command(opl3, opl3_reg, opl3->connection_reg);
441 }
442 }
443
444 #ifdef DEBUG_MIDI
445 snd_printk(KERN_DEBUG " --> setting OPL3 connection: 0x%x\n",
446 opl3->connection_reg);
447 #endif
448 /*
449 * calculate volume depending on connection
450 * between FM operators (see include/opl3.h)
451 */
452 for (i = 0; i < (instr_4op ? 4 : 2); i++)
453 vol_op[i] = fm->op[i].ksl_level;
454
455 connection = fm->feedback_connection[0] & 0x01;
456 if (instr_4op) {
457 connection <<= 1;
458 connection |= fm->feedback_connection[1] & 0x01;
459
460 snd_opl3_calc_volume(&vol_op[3], vel, chan);
461 switch (connection) {
462 case 0x03:
463 snd_opl3_calc_volume(&vol_op[2], vel, chan);
464 /* fallthru */
465 case 0x02:
466 snd_opl3_calc_volume(&vol_op[0], vel, chan);
467 break;
468 case 0x01:
469 snd_opl3_calc_volume(&vol_op[1], vel, chan);
470 }
471 } else {
472 snd_opl3_calc_volume(&vol_op[1], vel, chan);
473 if (connection)
474 snd_opl3_calc_volume(&vol_op[0], vel, chan);
475 }
476
477 /* Program the FM voice characteristics */
478 for (i = 0; i < (instr_4op ? 4 : 2); i++) {
479 #ifdef DEBUG_MIDI
480 snd_printk(KERN_DEBUG " --> programming operator %i\n", i);
481 #endif
482 op_offset = snd_opl3_regmap[voice_offset][i];
483
484 /* Set OPL3 AM_VIB register of requested voice/operator */
485 reg_val = fm->op[i].am_vib;
486 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
487 opl3->command(opl3, opl3_reg, reg_val);
488
489 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
490 reg_val = vol_op[i];
491 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
492 opl3->command(opl3, opl3_reg, reg_val);
493
494 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
495 reg_val = fm->op[i].attack_decay;
496 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
497 opl3->command(opl3, opl3_reg, reg_val);
498
499 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
500 reg_val = fm->op[i].sustain_release;
501 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
502 opl3->command(opl3, opl3_reg, reg_val);
503
504 /* Select waveform */
505 reg_val = fm->op[i].wave_select;
506 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
507 opl3->command(opl3, opl3_reg, reg_val);
508 }
509
510 /* Set operator feedback and 2op inter-operator connection */
511 reg_val = fm->feedback_connection[0];
512 /* Set output voice connection */
513 reg_val |= OPL3_STEREO_BITS;
514 if (chan->gm_pan < 43)
515 reg_val &= ~OPL3_VOICE_TO_RIGHT;
516 if (chan->gm_pan > 85)
517 reg_val &= ~OPL3_VOICE_TO_LEFT;
518 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
519 opl3->command(opl3, opl3_reg, reg_val);
520
521 if (instr_4op) {
522 /* Set 4op inter-operator connection */
523 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT;
524 /* Set output voice connection */
525 reg_val |= OPL3_STEREO_BITS;
526 if (chan->gm_pan < 43)
527 reg_val &= ~OPL3_VOICE_TO_RIGHT;
528 if (chan->gm_pan > 85)
529 reg_val &= ~OPL3_VOICE_TO_LEFT;
530 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION +
531 voice_offset + 3);
532 opl3->command(opl3, opl3_reg, reg_val);
533 }
534
535 /*
536 * Special treatment of percussion notes for fm:
537 * Requested pitch is really program, and pitch for
538 * device is whatever was specified in the patch library.
539 */
540 if (fm->fix_key)
541 note = fm->fix_key;
542 /*
543 * use transpose if defined in patch library
544 */
545 if (fm->trnsps)
546 note += (fm->trnsps - 64);
547
548 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan);
549
550 /* Set OPL3 FNUM_LOW register of requested voice */
551 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
552 opl3->command(opl3, opl3_reg, fnum);
553
554 opl3->voices[voice].keyon_reg = blocknum;
555
556 /* Set output sound flag */
557 blocknum |= OPL3_KEYON_BIT;
558
559 #ifdef DEBUG_MIDI
560 snd_printk(KERN_DEBUG " --> trigger voice %i\n", voice);
561 #endif
562 /* Set OPL3 KEYON_BLOCK register of requested voice */
563 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
564 opl3->command(opl3, opl3_reg, blocknum);
565
566 /* kill note after fixed duration (in centiseconds) */
567 if (fm->fix_dur) {
568 opl3->voices[voice].note_off = jiffies +
569 (fm->fix_dur * HZ) / 100;
570 snd_opl3_start_timer(opl3);
571 opl3->voices[voice].note_off_check = 1;
572 } else
573 opl3->voices[voice].note_off_check = 0;
574
575 /* get extra pgm, but avoid possible loops */
576 extra_prg = (extra_prg) ? 0 : fm->modes;
577
578 /* do the bookkeeping */
579 vp->time = opl3->use_time++;
580 vp->note = key;
581 vp->chan = chan;
582
583 if (instr_4op) {
584 vp->state = SNDRV_OPL3_ST_ON_4OP;
585
586 vp2 = &opl3->voices[voice + 3];
587 vp2->time = opl3->use_time++;
588 vp2->note = key;
589 vp2->chan = chan;
590 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL;
591 } else {
592 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
593 /* 4op killed by 2op, release bounded voice */
594 vp2 = &opl3->voices[voice + 3];
595 vp2->time = opl3->use_time++;
596 vp2->state = SNDRV_OPL3_ST_OFF;
597 }
598 vp->state = SNDRV_OPL3_ST_ON_2OP;
599 }
600
601 #ifdef DEBUG_ALLOC
602 debug_alloc(opl3, "note on ", voice);
603 #endif
604
605 /* allocate extra program if specified in patch library */
606 if (extra_prg) {
607 if (extra_prg > 128) {
608 bank = 128;
609 /* percussions start at 35 */
610 prg = extra_prg - 128 + 35 - 1;
611 } else {
612 bank = 0;
613 prg = extra_prg - 1;
614 }
615 #ifdef DEBUG_MIDI
616 snd_printk(KERN_DEBUG " *** allocating extra program\n");
617 #endif
618 goto __extra_prg;
619 }
620 spin_unlock_irqrestore(&opl3->voice_lock, flags);
621 }
622
623 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice)
624 {
625 unsigned short reg_side;
626 unsigned char voice_offset;
627 unsigned short opl3_reg;
628
629 struct snd_opl3_voice *vp, *vp2;
630
631 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
632 return;
633
634 vp = &opl3->voices[voice];
635 if (voice < MAX_OPL2_VOICES) {
636 /* Left register block for voices 0 .. 8 */
637 reg_side = OPL3_LEFT;
638 voice_offset = voice;
639 } else {
640 /* Right register block for voices 9 .. 17 */
641 reg_side = OPL3_RIGHT;
642 voice_offset = voice - MAX_OPL2_VOICES;
643 }
644
645 /* kill voice */
646 #ifdef DEBUG_MIDI
647 snd_printk(KERN_DEBUG " --> kill voice %i\n", voice);
648 #endif
649 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
650 /* clear Key ON bit */
651 opl3->command(opl3, opl3_reg, vp->keyon_reg);
652
653 /* do the bookkeeping */
654 vp->time = opl3->use_time++;
655
656 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
657 vp2 = &opl3->voices[voice + 3];
658
659 vp2->time = opl3->use_time++;
660 vp2->state = SNDRV_OPL3_ST_OFF;
661 }
662 vp->state = SNDRV_OPL3_ST_OFF;
663 #ifdef DEBUG_ALLOC
664 debug_alloc(opl3, "note off", voice);
665 #endif
666
667 }
668
669 /*
670 * Release a note in response to a midi note off.
671 */
672 static void snd_opl3_note_off_unsafe(void *p, int note, int vel,
673 struct snd_midi_channel *chan)
674 {
675 struct snd_opl3 *opl3;
676
677 int voice;
678 struct snd_opl3_voice *vp;
679
680 opl3 = p;
681
682 #ifdef DEBUG_MIDI
683 snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n",
684 chan->number, chan->midi_program, note);
685 #endif
686
687 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
688 if (chan->drum_channel && use_internal_drums) {
689 snd_opl3_drum_switch(opl3, note, vel, 0, chan);
690 return;
691 }
692 /* this loop will hopefully kill all extra voices, because
693 they are grouped by the same channel and note values */
694 for (voice = 0; voice < opl3->max_voices; voice++) {
695 vp = &opl3->voices[voice];
696 if (vp->state > 0 && vp->chan == chan && vp->note == note) {
697 snd_opl3_kill_voice(opl3, voice);
698 }
699 }
700 } else {
701 /* remap OSS voices */
702 if (chan->number < MAX_OPL3_VOICES) {
703 voice = snd_opl3_oss_map[chan->number];
704 snd_opl3_kill_voice(opl3, voice);
705 }
706 }
707 }
708
709 void snd_opl3_note_off(void *p, int note, int vel,
710 struct snd_midi_channel *chan)
711 {
712 struct snd_opl3 *opl3 = p;
713 unsigned long flags;
714
715 spin_lock_irqsave(&opl3->voice_lock, flags);
716 snd_opl3_note_off_unsafe(p, note, vel, chan);
717 spin_unlock_irqrestore(&opl3->voice_lock, flags);
718 }
719
720 /*
721 * key pressure change
722 */
723 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
724 {
725 struct snd_opl3 *opl3;
726
727 opl3 = p;
728 #ifdef DEBUG_MIDI
729 snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n",
730 chan->number, chan->midi_program);
731 #endif
732 }
733
734 /*
735 * terminate note
736 */
737 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan)
738 {
739 struct snd_opl3 *opl3;
740
741 opl3 = p;
742 #ifdef DEBUG_MIDI
743 snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n",
744 chan->number, chan->midi_program);
745 #endif
746 }
747
748 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice)
749 {
750 unsigned short reg_side;
751 unsigned char voice_offset;
752 unsigned short opl3_reg;
753
754 unsigned char fnum, blocknum;
755
756 struct snd_opl3_voice *vp;
757
758 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
759 return;
760
761 vp = &opl3->voices[voice];
762 if (vp->chan == NULL)
763 return; /* not allocated? */
764
765 if (voice < MAX_OPL2_VOICES) {
766 /* Left register block for voices 0 .. 8 */
767 reg_side = OPL3_LEFT;
768 voice_offset = voice;
769 } else {
770 /* Right register block for voices 9 .. 17 */
771 reg_side = OPL3_RIGHT;
772 voice_offset = voice - MAX_OPL2_VOICES;
773 }
774
775 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan);
776
777 /* Set OPL3 FNUM_LOW register of requested voice */
778 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
779 opl3->command(opl3, opl3_reg, fnum);
780
781 vp->keyon_reg = blocknum;
782
783 /* Set output sound flag */
784 blocknum |= OPL3_KEYON_BIT;
785
786 /* Set OPL3 KEYON_BLOCK register of requested voice */
787 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
788 opl3->command(opl3, opl3_reg, blocknum);
789
790 vp->time = opl3->use_time++;
791 }
792
793 /*
794 * Update voice pitch controller
795 */
796 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan)
797 {
798 int voice;
799 struct snd_opl3_voice *vp;
800
801 unsigned long flags;
802
803 spin_lock_irqsave(&opl3->voice_lock, flags);
804
805 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
806 for (voice = 0; voice < opl3->max_voices; voice++) {
807 vp = &opl3->voices[voice];
808 if (vp->state > 0 && vp->chan == chan) {
809 snd_opl3_update_pitch(opl3, voice);
810 }
811 }
812 } else {
813 /* remap OSS voices */
814 if (chan->number < MAX_OPL3_VOICES) {
815 voice = snd_opl3_oss_map[chan->number];
816 snd_opl3_update_pitch(opl3, voice);
817 }
818 }
819 spin_unlock_irqrestore(&opl3->voice_lock, flags);
820 }
821
822 /*
823 * Deal with a controller type event. This includes all types of
824 * control events, not just the midi controllers
825 */
826 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan)
827 {
828 struct snd_opl3 *opl3;
829
830 opl3 = p;
831 #ifdef DEBUG_MIDI
832 snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n",
833 type, chan->number, chan->midi_program);
834 #endif
835
836 switch (type) {
837 case MIDI_CTL_MSB_MODWHEEL:
838 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63)
839 opl3->drum_reg |= OPL3_VIBRATO_DEPTH;
840 else
841 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH;
842 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
843 opl3->drum_reg);
844 break;
845 case MIDI_CTL_E2_TREMOLO_DEPTH:
846 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63)
847 opl3->drum_reg |= OPL3_TREMOLO_DEPTH;
848 else
849 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH;
850 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
851 opl3->drum_reg);
852 break;
853 case MIDI_CTL_PITCHBEND:
854 snd_opl3_pitch_ctrl(opl3, chan);
855 break;
856 }
857 }
858
859 /*
860 * NRPN events
861 */
862 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan,
863 struct snd_midi_channel_set *chset)
864 {
865 struct snd_opl3 *opl3;
866
867 opl3 = p;
868 #ifdef DEBUG_MIDI
869 snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n",
870 chan->number, chan->midi_program);
871 #endif
872 }
873
874 /*
875 * receive sysex
876 */
877 void snd_opl3_sysex(void *p, unsigned char *buf, int len,
878 int parsed, struct snd_midi_channel_set *chset)
879 {
880 struct snd_opl3 *opl3;
881
882 opl3 = p;
883 #ifdef DEBUG_MIDI
884 snd_printk(KERN_DEBUG "SYSEX\n");
885 #endif
886 }
Linus' kernel tree