kernel/sound/drivers/opl3/opl3_midi.c

   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 < -0x2000)
 109                         pitchbend = -0x2000;
 110                 if (pitchbend > 0x1FFF)
 111                         pitchbend = 0x1FFF;
 112
 113                 segment = pitchbend / 0x1000;
 114                 freq = opl3_note_table[idx+segment];
 115                 freq += ((opl3_note_table[idx+segment+1] - freq) *
 116                          (pitchbend % 0x1000)) / 0x1000;
 117         } else {
 118                 freq = opl3_note_table[idx];
 119         }
 120
 121         *fnum = (unsigned char) freq;
 122         *blocknum = ((freq >> 8) & OPL3_FNUM_HIGH_MASK) |
 123                 ((block << 2) & OPL3_BLOCKNUM_MASK);
 124 }
 125
 126
 127 #ifdef DEBUG_ALLOC
 128 static void debug_alloc(struct snd_opl3 *opl3, char *s, int voice) {
 129         int i;
 130         char *str = "x.24";
 131
 132         printk(KERN_DEBUG "time %.5i: %s [%.2i]: ", opl3->use_time, s, voice);
 133         for (i = 0; i < opl3->max_voices; i++)
 134                 printk("%c", *(str + opl3->voices[i].state + 1));
 135         printk("\n");
 136 }
 137 #endif
 138
 139 /*
 140  * Get a FM voice (channel) to play a note on.
 141  */
 142 static int opl3_get_voice(struct snd_opl3 *opl3, int instr_4op,
 143                           struct snd_midi_channel *chan) {
 144         int chan_4op_1;         /* first voice for 4op instrument */
 145         int chan_4op_2;         /* second voice for 4op instrument */
 146
 147         struct snd_opl3_voice *vp, *vp2;
 148         unsigned int voice_time;
 149         int i;
 150
 151 #ifdef DEBUG_ALLOC
 152         char *alloc_type[3] = { "FREE     ", "CHEAP    ", "EXPENSIVE" };
 153 #endif
 154
 155         /* This is our "allocation cost" table */
 156         enum {
 157                 FREE = 0, CHEAP, EXPENSIVE, END
 158         };
 159
 160         /* Keeps track of what we are finding */
 161         struct best {
 162                 unsigned int time;
 163                 int voice;
 164         } best[END];
 165         struct best *bp;
 166
 167         for (i = 0; i < END; i++) {
 168                 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */
 169                 best[i].voice = -1;
 170         }
 171
 172         /* Look through all the channels for the most suitable. */
 173         for (i = 0; i < opl3->max_voices; i++) {
 174                 vp = &opl3->voices[i];
 175
 176                 if (vp->state == SNDRV_OPL3_ST_NOT_AVAIL)
 177                   /* skip unavailable channels, allocated by
 178                      drum voices or by bounded 4op voices) */
 179                         continue;
 180
 181                 voice_time = vp->time;
 182                 bp = best;
 183
 184                 chan_4op_1 = ((i < 3) || (i > 8 && i < 12));
 185                 chan_4op_2 = ((i > 2 && i < 6) || (i > 11 && i < 15));
 186                 if (instr_4op) {
 187                         /* allocate 4op voice */
 188                         /* skip channels unavailable to 4op instrument */
 189                         if (!chan_4op_1)
 190                                 continue;
 191
 192                         if (vp->state)
 193                                 /* kill one voice, CHEAP */
 194                                 bp++;
 195                         /* get state of bounded 2op channel
 196                            to be allocated for 4op instrument */
 197                         vp2 = &opl3->voices[i + 3];
 198                         if (vp2->state == SNDRV_OPL3_ST_ON_2OP) {
 199                                 /* kill two voices, EXPENSIVE */
 200                                 bp++;
 201                                 voice_time = (voice_time > vp->time) ?
 202                                         voice_time : vp->time;
 203                         }
 204                 } else {
 205                         /* allocate 2op voice */
 206                         if ((chan_4op_1) || (chan_4op_2))
 207                                 /* use bounded channels for 2op, CHEAP */
 208                                 bp++;
 209                         else if (vp->state)
 210                                 /* kill one voice on 2op channel, CHEAP */
 211                                 bp++;
 212                         /* raise kill cost to EXPENSIVE for all channels */
 213                         if (vp->state)
 214                                 bp++;
 215                 }
 216                 if (voice_time < bp->time) {
 217                         bp->time = voice_time;
 218                         bp->voice = i;
 219                 }
 220         }
 221
 222         for (i = 0; i < END; i++) {
 223                 if (best[i].voice >= 0) {
 224 #ifdef DEBUG_ALLOC
 225                         printk(KERN_DEBUG "%s %iop allocation on voice %i\n",
 226                                alloc_type[i], instr_4op ? 4 : 2,
 227                                best[i].voice);
 228 #endif
 229                         return best[i].voice;
 230                 }
 231         }
 232         /* not found */
 233         return -1;
 234 }
 235
 236 /* ------------------------------ */
 237
 238 /*
 239  * System timer interrupt function
 240  */
 241 void snd_opl3_timer_func(unsigned long data)
 242 {
 243
 244         struct snd_opl3 *opl3 = (struct snd_opl3 *)data;
 245         unsigned long flags;
 246         int again = 0;
 247         int i;
 248
 249         spin_lock_irqsave(&opl3->voice_lock, flags);
 250         for (i = 0; i < opl3->max_voices; i++) {
 251                 struct snd_opl3_voice *vp = &opl3->voices[i];
 252                 if (vp->state > 0 && vp->note_off_check) {
 253                         if (vp->note_off == jiffies)
 254                                 snd_opl3_note_off_unsafe(opl3, vp->note, 0,
 255                                                          vp->chan);
 256                         else
 257                                 again++;
 258                 }
 259         }
 260         spin_unlock_irqrestore(&opl3->voice_lock, flags);
 261
 262         spin_lock_irqsave(&opl3->sys_timer_lock, flags);
 263         if (again)
 264                 mod_timer(&opl3->tlist, jiffies + 1);   /* invoke again */
 265         else
 266                 opl3->sys_timer_status = 0;
 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                 mod_timer(&opl3->tlist, jiffies + 1);
 279                 opl3->sys_timer_status = 1;
 280         }
 281         spin_unlock_irqrestore(&opl3->sys_timer_lock, flags);
 282 }
 283
 284 /* ------------------------------ */
 285
 286
 287 static int snd_opl3_oss_map[MAX_OPL3_VOICES] = {
 288         0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17, 3, 4 ,5, 12, 13, 14
 289 };
 290
 291 /*
 292  * Start a note.
 293  */
 294 void snd_opl3_note_on(void *p, int note, int vel, struct snd_midi_channel *chan)
 295 {
 296         struct snd_opl3 *opl3;
 297         int instr_4op;
 298
 299         int voice;
 300         struct snd_opl3_voice *vp, *vp2;
 301         unsigned short connect_mask;
 302         unsigned char connection;
 303         unsigned char vol_op[4];
 304
 305         int extra_prg = 0;
 306
 307         unsigned short reg_side;
 308         unsigned char op_offset;
 309         unsigned char voice_offset;
 310         unsigned short opl3_reg;
 311         unsigned char reg_val;
 312         unsigned char prg, bank;
 313
 314         int key = note;
 315         unsigned char fnum, blocknum;
 316         int i;
 317
 318         struct fm_patch *patch;
 319         struct fm_instrument *fm;
 320         unsigned long flags;
 321
 322         opl3 = p;
 323
 324 #ifdef DEBUG_MIDI
 325         snd_printk(KERN_DEBUG "Note on, ch %i, inst %i, note %i, vel %i\n",
 326                    chan->number, chan->midi_program, note, vel);
 327 #endif
 328
 329         /* in SYNTH mode, application takes care of voices */
 330         /* in SEQ mode, drum voice numbers are notes on drum channel */
 331         if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
 332                 if (chan->drum_channel) {
 333                         /* percussion instruments are located in bank 128 */
 334                         bank = 128;
 335                         prg = note;
 336                 } else {
 337                         bank = chan->gm_bank_select;
 338                         prg = chan->midi_program;
 339                 }
 340         } else {
 341                 /* Prepare for OSS mode */
 342                 if (chan->number >= MAX_OPL3_VOICES)
 343                         return;
 344
 345                 /* OSS instruments are located in bank 127 */
 346                 bank = 127;
 347                 prg = chan->midi_program;
 348         }
 349
 350         spin_lock_irqsave(&opl3->voice_lock, flags);
 351
 352         if (use_internal_drums) {
 353                 snd_opl3_drum_switch(opl3, note, vel, 1, chan);
 354                 spin_unlock_irqrestore(&opl3->voice_lock, flags);
 355                 return;
 356         }
 357
 358  __extra_prg:
 359         patch = snd_opl3_find_patch(opl3, prg, bank, 0);
 360         if (!patch) {
 361                 spin_unlock_irqrestore(&opl3->voice_lock, flags);
 362                 return;
 363         }
 364
 365         fm = &patch->inst;
 366         switch (patch->type) {
 367         case FM_PATCH_OPL2:
 368                 instr_4op = 0;
 369                 break;
 370         case FM_PATCH_OPL3:
 371                 if (opl3->hardware >= OPL3_HW_OPL3) {
 372                         instr_4op = 1;
 373                         break;
 374                 }
 375         default:
 376                 spin_unlock_irqrestore(&opl3->voice_lock, flags);
 377                 return;
 378         }
 379 #ifdef DEBUG_MIDI
 380         snd_printk(KERN_DEBUG "  --> OPL%i instrument: %s\n",
 381                    instr_4op ? 3 : 2, patch->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 < 0) {
 393                 spin_unlock_irqrestore(&opl3->voice_lock, flags);
 394                 return;
 395         }
 396
 397         if (voice < MAX_OPL2_VOICES) {
 398                 /* Left register block for voices 0 .. 8 */
 399                 reg_side = OPL3_LEFT;
 400                 voice_offset = voice;
 401                 connect_mask = (OPL3_LEFT_4OP_0 << voice_offset) & 0x07;
 402         } else {
 403                 /* Right register block for voices 9 .. 17 */
 404                 reg_side = OPL3_RIGHT;
 405                 voice_offset = voice - MAX_OPL2_VOICES;
 406                 connect_mask = (OPL3_RIGHT_4OP_0 << voice_offset) & 0x38;
 407         }
 408
 409         /* kill voice on channel */
 410         vp = &opl3->voices[voice];
 411         if (vp->state > 0) {
 412                 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 413                 reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
 414                 opl3->command(opl3, opl3_reg, reg_val);
 415         }
 416         if (instr_4op) {
 417                 vp2 = &opl3->voices[voice + 3];
 418                 if (vp->state > 0) {
 419                         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK +
 420                                                voice_offset + 3);
 421                         reg_val = vp->keyon_reg & ~OPL3_KEYON_BIT;
 422                         opl3->command(opl3, opl3_reg, reg_val);
 423                 }
 424         }
 425
 426         /* set connection register */
 427         if (instr_4op) {
 428                 if ((opl3->connection_reg ^ connect_mask) & connect_mask) {
 429                         opl3->connection_reg |= connect_mask;
 430                         /* set connection bit */
 431                         opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
 432                         opl3->command(opl3, opl3_reg, opl3->connection_reg);
 433                 }
 434         } else {
 435                 if ((opl3->connection_reg ^ ~connect_mask) & connect_mask) {
 436                         opl3->connection_reg &= ~connect_mask;
 437                         /* clear connection bit */
 438                         opl3_reg = OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT;
 439                         opl3->command(opl3, opl3_reg, opl3->connection_reg);
 440                 }
 441         }
 442
 443 #ifdef DEBUG_MIDI
 444         snd_printk(KERN_DEBUG "  --> setting OPL3 connection: 0x%x\n",
 445                    opl3->connection_reg);
 446 #endif
 447         /*
 448          * calculate volume depending on connection
 449          * between FM operators (see include/opl3.h)
 450          */
 451         for (i = 0; i < (instr_4op ? 4 : 2); i++)
 452                 vol_op[i] = fm->op[i].ksl_level;
 453
 454         connection = fm->feedback_connection[0] & 0x01;
 455         if (instr_4op) {
 456                 connection <<= 1;
 457                 connection |= fm->feedback_connection[1] & 0x01;
 458
 459                 snd_opl3_calc_volume(&vol_op[3], vel, chan);
 460                 switch (connection) {
 461                 case 0x03:
 462                         snd_opl3_calc_volume(&vol_op[2], vel, chan);
 463                         /* fallthru */
 464                 case 0x02:
 465                         snd_opl3_calc_volume(&vol_op[0], vel, chan);
 466                         break;
 467                 case 0x01:
 468                         snd_opl3_calc_volume(&vol_op[1], vel, chan);
 469                 }
 470         } else {
 471                 snd_opl3_calc_volume(&vol_op[1], vel, chan);
 472                 if (connection)
 473                         snd_opl3_calc_volume(&vol_op[0], vel, chan);
 474         }
 475
 476         /* Program the FM voice characteristics */
 477         for (i = 0; i < (instr_4op ? 4 : 2); i++) {
 478 #ifdef DEBUG_MIDI
 479                 snd_printk(KERN_DEBUG "  --> programming operator %i\n", i);
 480 #endif
 481                 op_offset = snd_opl3_regmap[voice_offset][i];
 482
 483                 /* Set OPL3 AM_VIB register of requested voice/operator */
 484                 reg_val = fm->op[i].am_vib;
 485                 opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
 486                 opl3->command(opl3, opl3_reg, reg_val);
 487
 488                 /* Set OPL3 KSL_LEVEL register of requested voice/operator */
 489                 reg_val = vol_op[i];
 490                 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
 491                 opl3->command(opl3, opl3_reg, reg_val);
 492
 493                 /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
 494                 reg_val = fm->op[i].attack_decay;
 495                 opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
 496                 opl3->command(opl3, opl3_reg, reg_val);
 497
 498                 /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
 499                 reg_val = fm->op[i].sustain_release;
 500                 opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
 501                 opl3->command(opl3, opl3_reg, reg_val);
 502
 503                 /* Select waveform */
 504                 reg_val = fm->op[i].wave_select;
 505                 opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
 506                 opl3->command(opl3, opl3_reg, reg_val);
 507         }
 508
 509         /* Set operator feedback and 2op inter-operator connection */
 510         reg_val = fm->feedback_connection[0];
 511         /* Set output voice connection */
 512         reg_val |= OPL3_STEREO_BITS;
 513         if (chan->gm_pan < 43)
 514                 reg_val &= ~OPL3_VOICE_TO_RIGHT;
 515         if (chan->gm_pan > 85)
 516                 reg_val &= ~OPL3_VOICE_TO_LEFT;
 517         opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
 518         opl3->command(opl3, opl3_reg, reg_val);
 519
 520         if (instr_4op) {
 521                 /* Set 4op inter-operator connection */
 522                 reg_val = fm->feedback_connection[1] & OPL3_CONNECTION_BIT;
 523                 /* Set output voice connection */
 524                 reg_val |= OPL3_STEREO_BITS;
 525                 if (chan->gm_pan < 43)
 526                         reg_val &= ~OPL3_VOICE_TO_RIGHT;
 527                 if (chan->gm_pan > 85)
 528                         reg_val &= ~OPL3_VOICE_TO_LEFT;
 529                 opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION +
 530                                        voice_offset + 3);
 531                 opl3->command(opl3, opl3_reg, reg_val);
 532         }
 533
 534         /*
 535          * Special treatment of percussion notes for fm:
 536          * Requested pitch is really program, and pitch for
 537          * device is whatever was specified in the patch library.
 538          */
 539         if (fm->fix_key)
 540                 note = fm->fix_key;
 541         /*
 542          * use transpose if defined in patch library
 543          */
 544         if (fm->trnsps)
 545                 note += (fm->trnsps - 64);
 546
 547         snd_opl3_calc_pitch(&fnum, &blocknum, note, chan);
 548
 549         /* Set OPL3 FNUM_LOW register of requested voice */
 550         opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
 551         opl3->command(opl3, opl3_reg, fnum);
 552
 553         opl3->voices[voice].keyon_reg = blocknum;
 554
 555         /* Set output sound flag */
 556         blocknum |= OPL3_KEYON_BIT;
 557
 558 #ifdef DEBUG_MIDI
 559         snd_printk(KERN_DEBUG "  --> trigger voice %i\n", voice);
 560 #endif
 561         /* Set OPL3 KEYON_BLOCK register of requested voice */
 562         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 563         opl3->command(opl3, opl3_reg, blocknum);
 564
 565         /* kill note after fixed duration (in centiseconds) */
 566         if (fm->fix_dur) {
 567                 opl3->voices[voice].note_off = jiffies +
 568                         (fm->fix_dur * HZ) / 100;
 569                 snd_opl3_start_timer(opl3);
 570                 opl3->voices[voice].note_off_check = 1;
 571         } else
 572                 opl3->voices[voice].note_off_check = 0;
 573
 574         /* get extra pgm, but avoid possible loops */
 575         extra_prg = (extra_prg) ? 0 : fm->modes;
 576
 577         /* do the bookkeeping */
 578         vp->time = opl3->use_time++;
 579         vp->note = key;
 580         vp->chan = chan;
 581
 582         if (instr_4op) {
 583                 vp->state = SNDRV_OPL3_ST_ON_4OP;
 584
 585                 vp2 = &opl3->voices[voice + 3];
 586                 vp2->time = opl3->use_time++;
 587                 vp2->note = key;
 588                 vp2->chan = chan;
 589                 vp2->state = SNDRV_OPL3_ST_NOT_AVAIL;
 590         } else {
 591                 if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
 592                         /* 4op killed by 2op, release bounded voice */
 593                         vp2 = &opl3->voices[voice + 3];
 594                         vp2->time = opl3->use_time++;
 595                         vp2->state = SNDRV_OPL3_ST_OFF;
 596                 }
 597                 vp->state = SNDRV_OPL3_ST_ON_2OP;
 598         }
 599
 600 #ifdef DEBUG_ALLOC
 601         debug_alloc(opl3, "note on ", voice);
 602 #endif
 603
 604         /* allocate extra program if specified in patch library */
 605         if (extra_prg) {
 606                 if (extra_prg > 128) {
 607                         bank = 128;
 608                         /* percussions start at 35 */
 609                         prg = extra_prg - 128 + 35 - 1;
 610                 } else {
 611                         bank = 0;
 612                         prg = extra_prg - 1;
 613                 }
 614 #ifdef DEBUG_MIDI
 615                 snd_printk(KERN_DEBUG " *** allocating extra program\n");
 616 #endif
 617                 goto __extra_prg;
 618         }
 619         spin_unlock_irqrestore(&opl3->voice_lock, flags);
 620 }
 621
 622 static void snd_opl3_kill_voice(struct snd_opl3 *opl3, int voice)
 623 {
 624         unsigned short reg_side;
 625         unsigned char voice_offset;
 626         unsigned short opl3_reg;
 627
 628         struct snd_opl3_voice *vp, *vp2;
 629
 630         if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
 631                 return;
 632
 633         vp = &opl3->voices[voice];
 634         if (voice < MAX_OPL2_VOICES) {
 635                 /* Left register block for voices 0 .. 8 */
 636                 reg_side = OPL3_LEFT;
 637                 voice_offset = voice;
 638         } else {
 639                 /* Right register block for voices 9 .. 17 */
 640                 reg_side = OPL3_RIGHT;
 641                 voice_offset = voice - MAX_OPL2_VOICES;
 642         }
 643
 644         /* kill voice */
 645 #ifdef DEBUG_MIDI
 646         snd_printk(KERN_DEBUG "  --> kill voice %i\n", voice);
 647 #endif
 648         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 649         /* clear Key ON bit */
 650         opl3->command(opl3, opl3_reg, vp->keyon_reg);
 651
 652         /* do the bookkeeping */
 653         vp->time = opl3->use_time++;
 654
 655         if (vp->state == SNDRV_OPL3_ST_ON_4OP) {
 656                 vp2 = &opl3->voices[voice + 3];
 657
 658                 vp2->time = opl3->use_time++;
 659                 vp2->state = SNDRV_OPL3_ST_OFF;
 660         }
 661         vp->state = SNDRV_OPL3_ST_OFF;
 662 #ifdef DEBUG_ALLOC
 663         debug_alloc(opl3, "note off", voice);
 664 #endif
 665
 666 }
 667
 668 /*
 669  * Release a note in response to a midi note off.
 670  */
 671 static void snd_opl3_note_off_unsafe(void *p, int note, int vel,
 672                                      struct snd_midi_channel *chan)
 673 {
 674         struct snd_opl3 *opl3;
 675
 676         int voice;
 677         struct snd_opl3_voice *vp;
 678
 679         opl3 = p;
 680
 681 #ifdef DEBUG_MIDI
 682         snd_printk(KERN_DEBUG "Note off, ch %i, inst %i, note %i\n",
 683                    chan->number, chan->midi_program, note);
 684 #endif
 685
 686         if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
 687                 if (chan->drum_channel && use_internal_drums) {
 688                         snd_opl3_drum_switch(opl3, note, vel, 0, chan);
 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 }
 707
 708 void snd_opl3_note_off(void *p, int note, int vel,
 709                        struct snd_midi_channel *chan)
 710 {
 711         struct snd_opl3 *opl3 = p;
 712         unsigned long flags;
 713
 714         spin_lock_irqsave(&opl3->voice_lock, flags);
 715         snd_opl3_note_off_unsafe(p, note, vel, chan);
 716         spin_unlock_irqrestore(&opl3->voice_lock, flags);
 717 }
 718
 719 /*
 720  * key pressure change
 721  */
 722 void snd_opl3_key_press(void *p, int note, int vel, struct snd_midi_channel *chan)
 723 {
 724         struct snd_opl3 *opl3;
 725
 726         opl3 = p;
 727 #ifdef DEBUG_MIDI
 728         snd_printk(KERN_DEBUG "Key pressure, ch#: %i, inst#: %i\n",
 729                    chan->number, chan->midi_program);
 730 #endif
 731 }
 732
 733 /*
 734  * terminate note
 735  */
 736 void snd_opl3_terminate_note(void *p, int note, struct snd_midi_channel *chan)
 737 {
 738         struct snd_opl3 *opl3;
 739
 740         opl3 = p;
 741 #ifdef DEBUG_MIDI
 742         snd_printk(KERN_DEBUG "Terminate note, ch#: %i, inst#: %i\n",
 743                    chan->number, chan->midi_program);
 744 #endif
 745 }
 746
 747 static void snd_opl3_update_pitch(struct snd_opl3 *opl3, int voice)
 748 {
 749         unsigned short reg_side;
 750         unsigned char voice_offset;
 751         unsigned short opl3_reg;
 752
 753         unsigned char fnum, blocknum;
 754
 755         struct snd_opl3_voice *vp;
 756
 757         if (snd_BUG_ON(voice >= MAX_OPL3_VOICES))
 758                 return;
 759
 760         vp = &opl3->voices[voice];
 761         if (vp->chan == NULL)
 762                 return; /* not allocated? */
 763
 764         if (voice < MAX_OPL2_VOICES) {
 765                 /* Left register block for voices 0 .. 8 */
 766                 reg_side = OPL3_LEFT;
 767                 voice_offset = voice;
 768         } else {
 769                 /* Right register block for voices 9 .. 17 */
 770                 reg_side = OPL3_RIGHT;
 771                 voice_offset = voice - MAX_OPL2_VOICES;
 772         }
 773
 774         snd_opl3_calc_pitch(&fnum, &blocknum, vp->note, vp->chan);
 775
 776         /* Set OPL3 FNUM_LOW register of requested voice */
 777         opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
 778         opl3->command(opl3, opl3_reg, fnum);
 779
 780         vp->keyon_reg = blocknum;
 781
 782         /* Set output sound flag */
 783         blocknum |= OPL3_KEYON_BIT;
 784
 785         /* Set OPL3 KEYON_BLOCK register of requested voice */
 786         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 787         opl3->command(opl3, opl3_reg, blocknum);
 788
 789         vp->time = opl3->use_time++;
 790 }
 791
 792 /*
 793  * Update voice pitch controller
 794  */
 795 static void snd_opl3_pitch_ctrl(struct snd_opl3 *opl3, struct snd_midi_channel *chan)
 796 {
 797         int voice;
 798         struct snd_opl3_voice *vp;
 799
 800         unsigned long flags;
 801
 802         spin_lock_irqsave(&opl3->voice_lock, flags);
 803
 804         if (opl3->synth_mode == SNDRV_OPL3_MODE_SEQ) {
 805                 for (voice = 0; voice < opl3->max_voices; voice++) {
 806                         vp = &opl3->voices[voice];
 807                         if (vp->state > 0 && vp->chan == chan) {
 808                                 snd_opl3_update_pitch(opl3, voice);
 809                         }
 810                 }
 811         } else {
 812                 /* remap OSS voices */
 813                 if (chan->number < MAX_OPL3_VOICES) {
 814                         voice = snd_opl3_oss_map[chan->number];
 815                         snd_opl3_update_pitch(opl3, voice);
 816                 }
 817         }
 818         spin_unlock_irqrestore(&opl3->voice_lock, flags);
 819 }
 820
 821 /*
 822  * Deal with a controller type event.  This includes all types of
 823  * control events, not just the midi controllers
 824  */
 825 void snd_opl3_control(void *p, int type, struct snd_midi_channel *chan)
 826 {
 827         struct snd_opl3 *opl3;
 828
 829         opl3 = p;
 830 #ifdef DEBUG_MIDI
 831         snd_printk(KERN_DEBUG "Controller, TYPE = %i, ch#: %i, inst#: %i\n",
 832                    type, chan->number, chan->midi_program);
 833 #endif
 834
 835         switch (type) {
 836         case MIDI_CTL_MSB_MODWHEEL:
 837                 if (chan->control[MIDI_CTL_MSB_MODWHEEL] > 63)
 838                         opl3->drum_reg |= OPL3_VIBRATO_DEPTH;
 839                 else
 840                         opl3->drum_reg &= ~OPL3_VIBRATO_DEPTH;
 841                 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
 842                                  opl3->drum_reg);
 843                 break;
 844         case MIDI_CTL_E2_TREMOLO_DEPTH:
 845                 if (chan->control[MIDI_CTL_E2_TREMOLO_DEPTH] > 63)
 846                         opl3->drum_reg |= OPL3_TREMOLO_DEPTH;
 847                 else
 848                         opl3->drum_reg &= ~OPL3_TREMOLO_DEPTH;
 849                 opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION,
 850                                  opl3->drum_reg);
 851                 break;
 852         case MIDI_CTL_PITCHBEND:
 853                 snd_opl3_pitch_ctrl(opl3, chan);
 854                 break;
 855         }
 856 }
 857
 858 /*
 859  * NRPN events
 860  */
 861 void snd_opl3_nrpn(void *p, struct snd_midi_channel *chan,
 862                    struct snd_midi_channel_set *chset)
 863 {
 864         struct snd_opl3 *opl3;
 865
 866         opl3 = p;
 867 #ifdef DEBUG_MIDI
 868         snd_printk(KERN_DEBUG "NRPN, ch#: %i, inst#: %i\n",
 869                    chan->number, chan->midi_program);
 870 #endif
 871 }
 872
 873 /*
 874  * receive sysex
 875  */
 876 void snd_opl3_sysex(void *p, unsigned char *buf, int len,
 877                     int parsed, struct snd_midi_channel_set *chset)
 878 {
 879         struct snd_opl3 *opl3;
 880
 881         opl3 = p;
 882 #ifdef DEBUG_MIDI
 883         snd_printk(KERN_DEBUG "SYSEX\n");
 884 #endif
 885 }