1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (c) by Uros Bizjak <uros@kss-loka.si> 4 * 5 * Midi synth routines for OPL2/OPL3/OPL4 FM 6 */ 7 8 #undef DEBUG_ALLOC 9 #undef DEBUG_MIDI 10 11 #include "opl3_voice.h" 12 #include <sound/asoundef.h> 13 14 #ifdef DEBUG_MIDI 15 #define opl3_dbg(opl3, fmt, ...) \ 16 dev_dbg(((struct snd_opl3 *)(opl3))->card->dev, fmt, ##__VA_ARGS__) 17 #else 18 #define opl3_dbg(opl3, fmt, ...) do {} while (0) 19 #endif 20 21 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 22 struct snd_midi_channel *chan); 23 /* 24 * The next table looks magical, but it certainly is not. Its values have 25 * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception 26 * for i=0. This log-table converts a linear volume-scaling (0..127) to a 27 * logarithmic scaling as present in the FM-synthesizer chips. so : Volume 28 * 64 = 0 db = relative volume 0 and: Volume 32 = -6 db = relative 29 * volume -8 it was implemented as a table because it is only 128 bytes and 30 * it saves a lot of log() calculations. (Rob Hooft <hooft@chem.ruu.nl>) 31 */ 32 33 static const char opl3_volume_table[128] = 34 { 35 -63, -48, -40, -35, -32, -29, -27, -26, 36 -24, -23, -21, -20, -19, -18, -18, -17, 37 -16, -15, -15, -14, -13, -13, -12, -12, 38 -11, -11, -10, -10, -10, -9, -9, -8, 39 -8, -8, -7, -7, -7, -6, -6, -6, 40 -5, -5, -5, -5, -4, -4, -4, -4, 41 -3, -3, -3, -3, -2, -2, -2, -2, 42 -2, -1, -1, -1, -1, 0, 0, 0, 43 0, 0, 0, 1, 1, 1, 1, 1, 44 1, 2, 2, 2, 2, 2, 2, 2, 45 3, 3, 3, 3, 3, 3, 3, 4, 46 4, 4, 4, 4, 4, 4, 4, 5, 47 5, 5, 5, 5, 5, 5, 5, 5, 48 6, 6, 6, 6, 6, 6, 6, 6, 49 6, 7, 7, 7, 7, 7, 7, 7, 50 7, 7, 7, 8, 8, 8, 8, 8 51 }; 52 53 void snd_opl3_calc_volume(unsigned char *volbyte, int vel, 54 struct snd_midi_channel *chan) 55 { 56 int oldvol, newvol, n; 57 int volume; 58 59 volume = (vel * chan->gm_volume * chan->gm_expression) / (127*127); 60 if (volume > 127) 61 volume = 127; 62 63 oldvol = OPL3_TOTAL_LEVEL_MASK - (*volbyte & OPL3_TOTAL_LEVEL_MASK); 64 65 newvol = opl3_volume_table[volume] + oldvol; 66 if (newvol > OPL3_TOTAL_LEVEL_MASK) 67 newvol = OPL3_TOTAL_LEVEL_MASK; 68 else if (newvol < 0) 69 newvol = 0; 70 71 n = OPL3_TOTAL_LEVEL_MASK - (newvol & OPL3_TOTAL_LEVEL_MASK); 72 73 *volbyte = (*volbyte & OPL3_KSL_MASK) | (n & OPL3_TOTAL_LEVEL_MASK); 74 } 75 76 /* 77 * Converts the note frequency to block and fnum values for the FM chip 78 */ 79 static const short opl3_note_table[16] = 80 { 81 305, 323, /* for pitch bending, -2 semitones */ 82 343, 363, 385, 408, 432, 458, 485, 514, 544, 577, 611, 647, 83 686, 726 /* for pitch bending, +2 semitones */ 84 }; 85 86 static void snd_opl3_calc_pitch(unsigned char *fnum, unsigned char *blocknum, 87 int note, struct snd_midi_channel *chan) 88 { 89 int block = ((note / 12) & 0x07) - 1; 90 int idx = (note % 12) + 2; 91 int freq; 92 93 if (chan->midi_pitchbend) { 94 int pitchbend = chan->midi_pitchbend; 95 int segment; 96 97 if (pitchbend < -0x2000) 98 pitchbend = -0x2000; 99 if (pitchbend > 0x1FFF) 100 pitchbend = 0x1FFF; 101 102 segment = pitchbend / 0x1000; 103 freq = opl3_note_table[idx+segment]; 104 freq += ((opl3_note_table[idx+segment+1] - freq) * 105 (pitchbend % 0x1000)) / 0x1000; 106 } else { 107 freq = opl3_note_table[idx]; 108 } 109 110 *fnum = (unsigned char) freq; 111 *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) | 112 ((block << 2) & OPL3_BLOCKNUM_MASK); 113 } 114 115 116 #ifdef DEBUG_ALLOC 117 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) 118 { 119 int i; 120 const char *str = "x.24"; 121 char buf[MAX_OPL3_VOICES + 1]; 122 123 for (i = 0; i < opl3->max_voices; i++) 124 buf[i] = str[opl3->voices[i].state + 1]; 125 buf[i] = 0; 126 dev_dbg(opl3->card->dev, "time %.5i: %s [%.2i]: %s\n", 127 opl3->use_time, s, voice, buf); 128 } 129 #endif 130 131 /* 132 * Get a FM voice (channel) to play a note on. 133 */ 134 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op, 135 struct snd_midi_channel *chan) { 136 int chan_4op_1; /* first voice for 4op instrument */ 137 int chan_4op_2; /* second voice for 4op instrument */ 138 139 struct snd_opl3_voice *vp, *vp2; 140 unsigned int voice_time; 141 int i; 142 143 #ifdef DEBUG_ALLOC 144 char *alloc_type[3] = { "FREE ", "CHEAP ", "EXPENSIVE" }; 145 #endif 146 147 /* This is our "allocation cost" table */ 148 enum { 149 FREE = 0, CHEAP, EXPENSIVE, END 150 }; 151 152 /* Keeps track of what we are finding */ 153 struct best { 154 unsigned int time; 155 int voice; 156 } best[END]; 157 struct best *bp; 158 159 for (i = 0; i < END; i++) { 160 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ 161 best[i].voice = -1; 162 } 163 164 /* Look through all the channels for the most suitable. */ 165 for (i = 0; i < opl3->max_voices; i++) { 166 vp = &opl3->voices[i]; 167 168 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL) 169 /* skip unavailable channels, allocated by 170 drum voices or by bounded 4op voices) */ 171 continue; 172 173 voice_time = vp->time; 174 bp = best; 175 176 chan_4op_1 = ((i < 3) || (i > 8 && i < 12)); 177 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15)); 178 if (instr_4op) { 179 /* allocate 4op voice */ 180 /* skip channels unavailable to 4op instrument */ 181 if (!chan_4op_1) 182 continue; 183 184 if (vp->state) 185 /* kill one voice, CHEAP */ 186 bp++; 187 /* get state of bounded 2op channel 188 to be allocated for 4op instrument */ 189 vp2 = &opl3->voices[i + 3]; 190 if (vp2->state == SNDRV_OPL3_ST_ON_2OP) { 191 /* kill two voices, EXPENSIVE */ 192 bp++; 193 voice_time = max(voice_time, vp2->time); 194 } 195 } else { 196 /* allocate 2op voice */ 197 if ((chan_4op_1) || (chan_4op_2)) 198 /* use bounded channels for 2op, CHEAP */ 199 bp++; 200 else if (vp->state) 201 /* kill one voice on 2op channel, CHEAP */ 202 bp++; 203 /* raise kill cost to EXPENSIVE for all channels */ 204 if (vp->state) 205 bp++; 206 } 207 if (voice_time < bp->time) { 208 bp->time = voice_time; 209 bp->voice = i; 210 } 211 } 212 213 for (i = 0; i < END; i++) { 214 if (best[i].voice >= 0) { 215 #ifdef DEBUG_ALLOC 216 dev_dbg(opl3->card->dev, 217 "%s %iop allocation on voice %i\n", 218 alloc_type[i], instr_4op ? 4 : 2, 219 best[i].voice); 220 #endif 221 return best[i].voice; 222 } 223 } 224 /* not found */ 225 return -1; 226 } 227 228 /* ------------------------------ */ 229 230 /* 231 * System timer interrupt function 232 */ 233 void snd_opl3_timer_func(struct timer_list *t) 234 { 235 236 struct snd_opl3 *opl3 = timer_container_of(opl3, t, tlist); 237 int again = 0; 238 int i; 239 240 scoped_guard(spinlock_irqsave, &opl3->voice_lock) { 241 for (i = 0; i < opl3->max_voices; i++) { 242 struct snd_opl3_voice *vp = &opl3->voices[i]; 243 if (vp->state > 0 && vp->note_off_check) { 244 if (vp->note_off == jiffies) 245 snd_opl3_note_off_unsafe(opl3, vp->note, 0, 246 vp->chan); 247 else 248 again++; 249 } 250 } 251 } 252 253 guard(spinlock_irqsave)(&opl3->sys_timer_lock); 254 if (again) 255 mod_timer(&opl3->tlist, jiffies + 1); /* invoke again */ 256 else 257 opl3->sys_timer_status = 0; 258 } 259 260 /* 261 * Start system timer 262 */ 263 static void snd_opl3_start_timer(struct snd_opl3 *opl3) 264 { 265 guard(spinlock_irqsave)(&opl3->sys_timer_lock); 266 if (! opl3->sys_timer_status) { 267 mod_timer(&opl3->tlist, jiffies + 1); 268 opl3->sys_timer_status = 1; 269 } 270 } 271 272 /* ------------------------------ */ 273 274 275 static const int snd_opl3_oss_map[MAX_OPL3_VOICES] = { 276 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14 277 }; 278 279 /* 280 * Start a note. 281 */ 282 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan) 283 { 284 struct snd_opl3 *opl3; 285 int instr_4op; 286 287 int voice; 288 struct snd_opl3_voice *vp, *vp2; 289 unsigned short connect_mask; 290 unsigned char connection; 291 unsigned char vol_op[4]; 292 293 int extra_prg = 0; 294 295 unsigned short reg_side; 296 unsigned char op_offset; 297 unsigned char voice_offset; 298 unsigned short opl3_reg; 299 unsigned char reg_val; 300 unsigned char prg, bank; 301 302 int key = note; 303 unsigned char fnum, blocknum; 304 int i; 305 306 struct fm_patch *patch; 307 struct fm_instrument *fm; 308 309 opl3 = p; 310 311 opl3_dbg(opl3, "Note on, ch %i, inst %i, note %i, vel %i\n", 312 chan->number, chan->midi_program, note, vel); 313 314 /* in SYNTH mode, application takes care of voices */ 315 /* in SEQ mode, drum voice numbers are notes on drum channel */ 316 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 317 if (chan->drum_channel) { 318 /* percussion instruments are located in bank 128 */ 319 bank = 128; 320 prg = note; 321 } else { 322 bank = chan->gm_bank_select; 323 prg = chan->midi_program; 324 } 325 } else { 326 /* Prepare for OSS mode */ 327 if (chan->number >= MAX_OPL3_VOICES) 328 return; 329 330 /* OSS instruments are located in bank 127 */ 331 bank = 127; 332 prg = chan->midi_program; 333 } 334 335 guard(spinlock_irqsave)(&opl3->voice_lock); 336 337 if (use_internal_drums) { 338 snd_opl3_drum_switch(opl3, note, vel, 1, chan); 339 return; 340 } 341 342 __extra_prg: 343 patch = snd_opl3_find_patch(opl3, prg, bank, 0); 344 if (!patch) 345 return; 346 347 fm = &patch->inst; 348 switch (patch->type) { 349 case FM_PATCH_OPL2: 350 instr_4op = 0; 351 break; 352 case FM_PATCH_OPL3: 353 if (opl3->hardware >= OPL3_HW_OPL3) { 354 instr_4op = 1; 355 break; 356 } 357 fallthrough; 358 default: 359 return; 360 } 361 opl3_dbg(opl3, " --> OPL%i instrument: %s\n", 362 instr_4op ? 3 : 2, patch->name); 363 /* in SYNTH mode, application takes care of voices */ 364 /* in SEQ mode, allocate voice on free OPL3 channel */ 365 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 366 voice = opl3_get_voice(opl3, instr_4op, chan); 367 } else { 368 /* remap OSS voice */ 369 voice = snd_opl3_oss_map[chan->number]; 370 } 371 372 if (voice < 0) 373 return; 374 375 if (voice < MAX_OPL2_VOICES) { 376 /* Left register block for voices 0 .. 8 */ 377 reg_side = OPL3_LEFT; 378 voice_offset = voice; 379 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07; 380 } else { 381 /* Right register block for voices 9 .. 17 */ 382 reg_side = OPL3_RIGHT; 383 voice_offset = voice - MAX_OPL2_VOICES; 384 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38; 385 } 386 387 /* kill voice on channel */ 388 vp = &opl3->voices[voice]; 389 if (vp->state > 0) { 390 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 391 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 392 opl3->command(opl3, opl3_reg, reg_val); 393 } 394 if (instr_4op) { 395 vp2 = &opl3->voices[voice + 3]; 396 if (vp2->state > 0) { 397 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + 398 voice_offset + 3); 399 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT; 400 opl3->command(opl3, opl3_reg, reg_val); 401 } 402 } 403 404 /* set connection register */ 405 if (instr_4op) { 406 if ((opl3->connection_reg ^ connect_mask) & connect_mask) { 407 opl3->connection_reg |= connect_mask; 408 /* set connection bit */ 409 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 410 opl3->command(opl3, opl3_reg, opl3->connection_reg); 411 } 412 } else { 413 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) { 414 opl3->connection_reg &= ~connect_mask; 415 /* clear connection bit */ 416 opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT; 417 opl3->command(opl3, opl3_reg, opl3->connection_reg); 418 } 419 } 420 421 opl3_dbg(opl3, " --> setting OPL3 connection: 0x%x\n", 422 opl3->connection_reg); 423 /* 424 * calculate volume depending on connection 425 * between FM operators (see include/opl3.h) 426 */ 427 for (i = 0; i < (instr_4op ? 4 : 2); i++) 428 vol_op[i] = fm->op[i].ksl_level; 429 430 connection = fm->feedback_connection[0] & 0x01; 431 if (instr_4op) { 432 connection <<= 1; 433 connection |= fm->feedback_connection[1] & 0x01; 434 435 snd_opl3_calc_volume(&vol_op[3], vel, chan); 436 switch (connection) { 437 case 0x03: 438 snd_opl3_calc_volume(&vol_op[2], vel, chan); 439 fallthrough; 440 case 0x02: 441 snd_opl3_calc_volume(&vol_op[0], vel, chan); 442 break; 443 case 0x01: 444 snd_opl3_calc_volume(&vol_op[1], vel, chan); 445 } 446 } else { 447 snd_opl3_calc_volume(&vol_op[1], vel, chan); 448 if (connection) 449 snd_opl3_calc_volume(&vol_op[0], vel, chan); 450 } 451 452 /* Program the FM voice characteristics */ 453 for (i = 0; i < (instr_4op ? 4 : 2); i++) { 454 opl3_dbg(opl3, " --> programming operator %i\n", i); 455 op_offset = snd_opl3_regmap[voice_offset][i]; 456 457 /* Set OPL3 AM_VIB register of requested voice/operator */ 458 reg_val = fm->op[i].am_vib; 459 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset); 460 opl3->command(opl3, opl3_reg, reg_val); 461 462 /* Set OPL3 KSL_LEVEL register of requested voice/operator */ 463 reg_val = vol_op[i]; 464 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset); 465 opl3->command(opl3, opl3_reg, reg_val); 466 467 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */ 468 reg_val = fm->op[i].attack_decay; 469 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset); 470 opl3->command(opl3, opl3_reg, reg_val); 471 472 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */ 473 reg_val = fm->op[i].sustain_release; 474 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset); 475 opl3->command(opl3, opl3_reg, reg_val); 476 477 /* Select waveform */ 478 reg_val = fm->op[i].wave_select; 479 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset); 480 opl3->command(opl3, opl3_reg, reg_val); 481 } 482 483 /* Set operator feedback and 2op inter-operator connection */ 484 reg_val = fm->feedback_connection[0]; 485 /* Set output voice connection */ 486 reg_val |= OPL3_STEREO_BITS; 487 if (chan->gm_pan < 43) 488 reg_val &= ~OPL3_VOICE_TO_RIGHT; 489 if (chan->gm_pan > 85) 490 reg_val &= ~OPL3_VOICE_TO_LEFT; 491 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset); 492 opl3->command(opl3, opl3_reg, reg_val); 493 494 if (instr_4op) { 495 /* Set 4op inter-operator connection */ 496 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT; 497 /* Set output voice connection */ 498 reg_val |= OPL3_STEREO_BITS; 499 if (chan->gm_pan < 43) 500 reg_val &= ~OPL3_VOICE_TO_RIGHT; 501 if (chan->gm_pan > 85) 502 reg_val &= ~OPL3_VOICE_TO_LEFT; 503 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + 504 voice_offset + 3); 505 opl3->command(opl3, opl3_reg, reg_val); 506 } 507 508 /* 509 * Special treatment of percussion notes for fm: 510 * Requested pitch is really program, and pitch for 511 * device is whatever was specified in the patch library. 512 */ 513 if (fm->fix_key) 514 note = fm->fix_key; 515 /* 516 * use transpose if defined in patch library 517 */ 518 if (fm->trnsps) 519 note += (fm->trnsps - 64); 520 521 snd_opl3_calc_pitch(&fnum, &blocknum, note, chan); 522 523 /* Set OPL3 FNUM_LOW register of requested voice */ 524 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 525 opl3->command(opl3, opl3_reg, fnum); 526 527 opl3->voices[voice].keyon_reg = blocknum; 528 529 /* Set output sound flag */ 530 blocknum |= OPL3_KEYON_BIT; 531 532 opl3_dbg(opl3, " --> trigger voice %i\n", voice); 533 /* Set OPL3 KEYON_BLOCK register of requested voice */ 534 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 535 opl3->command(opl3, opl3_reg, blocknum); 536 537 /* kill note after fixed duration (in centiseconds) */ 538 if (fm->fix_dur) { 539 opl3->voices[voice].note_off = jiffies + 540 (fm->fix_dur * HZ) / 100; 541 snd_opl3_start_timer(opl3); 542 opl3->voices[voice].note_off_check = 1; 543 } else 544 opl3->voices[voice].note_off_check = 0; 545 546 /* get extra pgm, but avoid possible loops */ 547 extra_prg = (extra_prg) ? 0 : fm->modes; 548 549 /* do the bookkeeping */ 550 vp->time = opl3->use_time++; 551 vp->note = key; 552 vp->chan = chan; 553 554 if (instr_4op) { 555 vp->state = SNDRV_OPL3_ST_ON_4OP; 556 557 vp2 = &opl3->voices[voice + 3]; 558 vp2->time = opl3->use_time++; 559 vp2->note = key; 560 vp2->chan = chan; 561 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL; 562 } else { 563 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 564 /* 4op killed by 2op, release bounded voice */ 565 vp2 = &opl3->voices[voice + 3]; 566 vp2->time = opl3->use_time++; 567 vp2->state = SNDRV_OPL3_ST_OFF; 568 } 569 vp->state = SNDRV_OPL3_ST_ON_2OP; 570 } 571 572 #ifdef DEBUG_ALLOC 573 debug_alloc(opl3, "note on ", voice); 574 #endif 575 576 /* allocate extra program if specified in patch library */ 577 if (extra_prg) { 578 if (extra_prg > 128) { 579 bank = 128; 580 /* percussions start at 35 */ 581 prg = extra_prg - 128 + 35 - 1; 582 } else { 583 bank = 0; 584 prg = extra_prg - 1; 585 } 586 opl3_dbg(opl3, " *** allocating extra program\n"); 587 goto __extra_prg; 588 } 589 } 590 591 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice) 592 { 593 unsigned short reg_side; 594 unsigned char voice_offset; 595 unsigned short opl3_reg; 596 597 struct snd_opl3_voice *vp, *vp2; 598 599 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 600 return; 601 602 vp = &opl3->voices[voice]; 603 if (voice < MAX_OPL2_VOICES) { 604 /* Left register block for voices 0 .. 8 */ 605 reg_side = OPL3_LEFT; 606 voice_offset = voice; 607 } else { 608 /* Right register block for voices 9 .. 17 */ 609 reg_side = OPL3_RIGHT; 610 voice_offset = voice - MAX_OPL2_VOICES; 611 } 612 613 /* kill voice */ 614 opl3_dbg(opl3, " --> kill voice %i\n", voice); 615 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 616 /* clear Key ON bit */ 617 opl3->command(opl3, opl3_reg, vp->keyon_reg); 618 619 /* do the bookkeeping */ 620 vp->time = opl3->use_time++; 621 622 if (vp->state == SNDRV_OPL3_ST_ON_4OP) { 623 vp2 = &opl3->voices[voice + 3]; 624 625 vp2->time = opl3->use_time++; 626 vp2->state = SNDRV_OPL3_ST_OFF; 627 } 628 vp->state = SNDRV_OPL3_ST_OFF; 629 #ifdef DEBUG_ALLOC 630 debug_alloc(opl3, "note off", voice); 631 #endif 632 633 } 634 635 /* 636 * Release a note in response to a midi note off. 637 */ 638 static void snd_opl3_note_off_unsafe(void *p, int note, int vel, 639 struct snd_midi_channel *chan) 640 { 641 struct snd_opl3 *opl3; 642 643 int voice; 644 struct snd_opl3_voice *vp; 645 646 opl3 = p; 647 648 opl3_dbg(opl3, "Note off, ch %i, inst %i, note %i\n", 649 chan->number, chan->midi_program, note); 650 651 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 652 if (chan->drum_channel && use_internal_drums) { 653 snd_opl3_drum_switch(opl3, note, vel, 0, chan); 654 return; 655 } 656 /* this loop will hopefully kill all extra voices, because 657 they are grouped by the same channel and note values */ 658 for (voice = 0; voice < opl3->max_voices; voice++) { 659 vp = &opl3->voices[voice]; 660 if (vp->state > 0 && vp->chan == chan && vp->note == note) { 661 snd_opl3_kill_voice(opl3, voice); 662 } 663 } 664 } else { 665 /* remap OSS voices */ 666 if (chan->number < MAX_OPL3_VOICES) { 667 voice = snd_opl3_oss_map[chan->number]; 668 snd_opl3_kill_voice(opl3, voice); 669 } 670 } 671 } 672 673 void snd_opl3_note_off(void *p, int note, int vel, 674 struct snd_midi_channel *chan) 675 { 676 struct snd_opl3 *opl3 = p; 677 678 guard(spinlock_irqsave)(&opl3->voice_lock); 679 snd_opl3_note_off_unsafe(p, note, vel, chan); 680 } 681 682 /* 683 * key pressure change 684 */ 685 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan) 686 { 687 opl3_dbg(p, "Key pressure, ch#: %i, inst#: %i\n", 688 chan->number, chan->midi_program); 689 } 690 691 /* 692 * terminate note 693 */ 694 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan) 695 { 696 opl3_dbg(p, "Terminate note, ch#: %i, inst#: %i\n", 697 chan->number, chan->midi_program); 698 } 699 700 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice) 701 { 702 unsigned short reg_side; 703 unsigned char voice_offset; 704 unsigned short opl3_reg; 705 706 unsigned char fnum, blocknum; 707 708 struct snd_opl3_voice *vp; 709 710 if (snd_BUG_ON(voice >= MAX_OPL3_VOICES)) 711 return; 712 713 vp = &opl3->voices[voice]; 714 if (vp->chan == NULL) 715 return; /* not allocated? */ 716 717 if (voice < MAX_OPL2_VOICES) { 718 /* Left register block for voices 0 .. 8 */ 719 reg_side = OPL3_LEFT; 720 voice_offset = voice; 721 } else { 722 /* Right register block for voices 9 .. 17 */ 723 reg_side = OPL3_RIGHT; 724 voice_offset = voice - MAX_OPL2_VOICES; 725 } 726 727 snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan); 728 729 /* Set OPL3 FNUM_LOW register of requested voice */ 730 opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset); 731 opl3->command(opl3, opl3_reg, fnum); 732 733 vp->keyon_reg = blocknum; 734 735 /* Set output sound flag */ 736 blocknum |= OPL3_KEYON_BIT; 737 738 /* Set OPL3 KEYON_BLOCK register of requested voice */ 739 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset); 740 opl3->command(opl3, opl3_reg, blocknum); 741 742 vp->time = opl3->use_time++; 743 } 744 745 /* 746 * Update voice pitch controller 747 */ 748 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan) 749 { 750 int voice; 751 struct snd_opl3_voice *vp; 752 753 guard(spinlock_irqsave)(&opl3->voice_lock); 754 755 if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) { 756 for (voice = 0; voice < opl3->max_voices; voice++) { 757 vp = &opl3->voices[voice]; 758 if (vp->state > 0 && vp->chan == chan) { 759 snd_opl3_update_pitch(opl3, voice); 760 } 761 } 762 } else { 763 /* remap OSS voices */ 764 if (chan->number < MAX_OPL3_VOICES) { 765 voice = snd_opl3_oss_map[chan->number]; 766 snd_opl3_update_pitch(opl3, voice); 767 } 768 } 769 } 770 771 /* 772 * Deal with a controller type event. This includes all types of 773 * control events, not just the midi controllers 774 */ 775 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan) 776 { 777 struct snd_opl3 *opl3; 778 779 opl3 = p; 780 opl3_dbg(opl3, "Controller, TYPE = %i, ch#: %i, inst#: %i\n", 781 type, chan->number, chan->midi_program); 782 783 switch (type) { 784 case MIDI_CTL_MSB_MODWHEEL: 785 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63) 786 opl3->drum_reg |= OPL3_VIBRATO_DEPTH; 787 else 788 opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH; 789 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 790 opl3->drum_reg); 791 break; 792 case MIDI_CTL_E2_TREMOLO_DEPTH: 793 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63) 794 opl3->drum_reg |= OPL3_TREMOLO_DEPTH; 795 else 796 opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH; 797 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 798 opl3->drum_reg); 799 break; 800 case MIDI_CTL_PITCHBEND: 801 snd_opl3_pitch_ctrl(opl3, chan); 802 break; 803 } 804 } 805 806 /* 807 * NRPN events 808 */ 809 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan, 810 struct snd_midi_channel_set *chset) 811 { 812 opl3_dbg(p, "NRPN, ch#: %i, inst#: %i\n", 813 chan->number, chan->midi_program); 814 } 815 816 /* 817 * receive sysex 818 */ 819 void snd_opl3_sysex(void *p, unsigned char *buf, int len, 820 int parsed, struct snd_midi_channel_set *chset) 821 { 822 opl3_dbg(p, "SYSEX\n"); 823 } 824