sound/isa/sb/emu8000_callback.c

   1 /*
   2  *  synth callback routines for the emu8000 (AWE32/64)
   3  *
   4  *  Copyright (C) 1999 Steve Ratcliffe
   5  *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #include "emu8000_local.h"
  23 #include <sound/asoundef.h>
  24
  25 /*
  26  * prototypes
  27  */
  28 static snd_emux_voice_t *get_voice(snd_emux_t *emu, snd_emux_port_t *port);
  29 static int start_voice(snd_emux_voice_t *vp);
  30 static void trigger_voice(snd_emux_voice_t *vp);
  31 static void release_voice(snd_emux_voice_t *vp);
  32 static void update_voice(snd_emux_voice_t *vp, int update);
  33 static void reset_voice(snd_emux_t *emu, int ch);
  34 static void terminate_voice(snd_emux_voice_t *vp);
  35 static void sysex(snd_emux_t *emu, char *buf, int len, int parsed, snd_midi_channel_set_t *chset);
  36 #ifdef CONFIG_SND_SEQUENCER_OSS
  37 static int oss_ioctl(snd_emux_t *emu, int cmd, int p1, int p2);
  38 #endif
  39 static int load_fx(snd_emux_t *emu, int type, int mode, const void __user *buf, long len);
  40
  41 static void set_pitch(emu8000_t *hw, snd_emux_voice_t *vp);
  42 static void set_volume(emu8000_t *hw, snd_emux_voice_t *vp);
  43 static void set_pan(emu8000_t *hw, snd_emux_voice_t *vp);
  44 static void set_fmmod(emu8000_t *hw, snd_emux_voice_t *vp);
  45 static void set_tremfreq(emu8000_t *hw, snd_emux_voice_t *vp);
  46 static void set_fm2frq2(emu8000_t *hw, snd_emux_voice_t *vp);
  47 static void set_filterQ(emu8000_t *hw, snd_emux_voice_t *vp);
  48 static void snd_emu8000_tweak_voice(emu8000_t *emu, int ch);
  49
  50 /*
  51  * Ensure a value is between two points
  52  * macro evaluates its args more than once, so changed to upper-case.
  53  */
  54 #define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0)
  55 #define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0)
  56
  57
  58 /*
  59  * set up operators
  60  */
  61 static snd_emux_operators_t emu8000_ops = {
  62         .owner =        THIS_MODULE,
  63         .get_voice =    get_voice,
  64         .prepare =      start_voice,
  65         .trigger =      trigger_voice,
  66         .release =      release_voice,
  67         .update =       update_voice,
  68         .terminate =    terminate_voice,
  69         .reset =        reset_voice,
  70         .sample_new =   snd_emu8000_sample_new,
  71         .sample_free =  snd_emu8000_sample_free,
  72         .sample_reset = snd_emu8000_sample_reset,
  73         .load_fx =      load_fx,
  74         .sysex =        sysex,
  75 #ifdef CONFIG_SND_SEQUENCER_OSS
  76         .oss_ioctl =    oss_ioctl,
  77 #endif
  78 };
  79
  80 void
  81 snd_emu8000_ops_setup(emu8000_t *hw)
  82 {
  83         hw->emu->ops = emu8000_ops;
  84 }
  85
  86
  87
  88 /*
  89  * Terminate a voice
  90  */
  91 static void
  92 release_voice(snd_emux_voice_t *vp)
  93 {
  94         int dcysusv;
  95         emu8000_t *hw;
  96
  97         hw = vp->hw;
  98         dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease;
  99         EMU8000_DCYSUS_WRITE(hw, vp->ch, dcysusv);
 100         dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease;
 101         EMU8000_DCYSUSV_WRITE(hw, vp->ch, dcysusv);
 102 }
 103
 104
 105 /*
 106  */
 107 static void
 108 terminate_voice(snd_emux_voice_t *vp)
 109 {
 110         emu8000_t *hw;
 111
 112         hw = vp->hw;
 113         EMU8000_DCYSUSV_WRITE(hw, vp->ch, 0x807F);
 114 }
 115
 116
 117 /*
 118  */
 119 static void
 120 update_voice(snd_emux_voice_t *vp, int update)
 121 {
 122         emu8000_t *hw;
 123
 124         hw = vp->hw;
 125         if (update & SNDRV_EMUX_UPDATE_VOLUME)
 126                 set_volume(hw, vp);
 127         if (update & SNDRV_EMUX_UPDATE_PITCH)
 128                 set_pitch(hw, vp);
 129         if ((update & SNDRV_EMUX_UPDATE_PAN) &&
 130             vp->port->ctrls[EMUX_MD_REALTIME_PAN])
 131                 set_pan(hw, vp);
 132         if (update & SNDRV_EMUX_UPDATE_FMMOD)
 133                 set_fmmod(hw, vp);
 134         if (update & SNDRV_EMUX_UPDATE_TREMFREQ)
 135                 set_tremfreq(hw, vp);
 136         if (update & SNDRV_EMUX_UPDATE_FM2FRQ2)
 137                 set_fm2frq2(hw, vp);
 138         if (update & SNDRV_EMUX_UPDATE_Q)
 139                 set_filterQ(hw, vp);
 140 }
 141
 142
 143 /*
 144  * Find a channel (voice) within the EMU that is not in use or at least
 145  * less in use than other channels.  Always returns a valid pointer
 146  * no matter what.  If there is a real shortage of voices then one
 147  * will be cut. Such is life.
 148  *
 149  * The channel index (vp->ch) must be initialized in this routine.
 150  * In Emu8k, it is identical with the array index.
 151  */
 152 static snd_emux_voice_t *
 153 get_voice(snd_emux_t *emu, snd_emux_port_t *port)
 154 {
 155         int  i;
 156         snd_emux_voice_t *vp;
 157         emu8000_t *hw;
 158
 159         /* what we are looking for, in order of preference */
 160         enum {
 161                 OFF=0, RELEASED, PLAYING, END
 162         };
 163
 164         /* Keeps track of what we are finding */
 165         struct best {
 166                 unsigned int  time;
 167                 int voice;
 168         } best[END];
 169         struct best *bp;
 170
 171         hw = emu->hw;
 172
 173         for (i = 0; i < END; i++) {
 174                 best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */;
 175                 best[i].voice = -1;
 176         }
 177
 178         /*
 179          * Go through them all and get a best one to use.
 180          */
 181         for (i = 0; i < emu->max_voices; i++) {
 182                 int state, val;
 183
 184                 vp = &emu->voices[i];
 185                 state = vp->state;
 186
 187                 if (state == SNDRV_EMUX_ST_OFF)
 188                         bp = best + OFF;
 189                 else if (state == SNDRV_EMUX_ST_RELEASED ||
 190                          state == SNDRV_EMUX_ST_PENDING) {
 191                         bp = best + RELEASED;
 192                         val = (EMU8000_CVCF_READ(hw, vp->ch) >> 16) & 0xffff;
 193                         if (! val)
 194                                 bp = best + OFF;
 195                 }
 196                 else if (state & SNDRV_EMUX_ST_ON)
 197                         bp = best + PLAYING;
 198                 else
 199                         continue;
 200
 201                 /* check if sample is finished playing (non-looping only) */
 202                 if (state != SNDRV_EMUX_ST_OFF &&
 203                     (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) {
 204                         val = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
 205                         if (val >= vp->reg.loopstart)
 206                                 bp = best + OFF;
 207                 }
 208
 209                 if (vp->time < bp->time) {
 210                         bp->time = vp->time;
 211                         bp->voice = i;
 212                 }
 213         }
 214
 215         for (i = 0; i < END; i++) {
 216                 if (best[i].voice >= 0) {
 217                         vp = &emu->voices[best[i].voice];
 218                         vp->ch = best[i].voice;
 219                         return vp;
 220                 }
 221         }
 222
 223         /* not found */
 224         return NULL;
 225 }
 226
 227 /*
 228  */
 229 static int
 230 start_voice(snd_emux_voice_t *vp)
 231 {
 232         unsigned int temp;
 233         int ch;
 234         int addr;
 235         snd_midi_channel_t *chan;
 236         emu8000_t *hw;
 237
 238         hw = vp->hw;
 239         ch = vp->ch;
 240         chan = vp->chan;
 241
 242         /* channel to be silent and idle */
 243         EMU8000_DCYSUSV_WRITE(hw, ch, 0x0080);
 244         EMU8000_VTFT_WRITE(hw, ch, 0x0000FFFF);
 245         EMU8000_CVCF_WRITE(hw, ch, 0x0000FFFF);
 246         EMU8000_PTRX_WRITE(hw, ch, 0);
 247         EMU8000_CPF_WRITE(hw, ch, 0);
 248
 249         /* set pitch offset */
 250         set_pitch(hw, vp);
 251
 252         /* set envelope parameters */
 253         EMU8000_ENVVAL_WRITE(hw, ch, vp->reg.parm.moddelay);
 254         EMU8000_ATKHLD_WRITE(hw, ch, vp->reg.parm.modatkhld);
 255         EMU8000_DCYSUS_WRITE(hw, ch, vp->reg.parm.moddcysus);
 256         EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay);
 257         EMU8000_ATKHLDV_WRITE(hw, ch, vp->reg.parm.volatkhld);
 258         /* decay/sustain parameter for volume envelope is used
 259            for triggerg the voice */
 260
 261         /* cutoff and volume */
 262         set_volume(hw, vp);
 263
 264         /* modulation envelope heights */
 265         EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe);
 266
 267         /* lfo1/2 delay */
 268         EMU8000_LFO1VAL_WRITE(hw, ch, vp->reg.parm.lfo1delay);
 269         EMU8000_LFO2VAL_WRITE(hw, ch, vp->reg.parm.lfo2delay);
 270
 271         /* lfo1 pitch & cutoff shift */
 272         set_fmmod(hw, vp);
 273         /* lfo1 volume & freq */
 274         set_tremfreq(hw, vp);
 275         /* lfo2 pitch & freq */
 276         set_fm2frq2(hw, vp);
 277         /* pan & loop start */
 278         set_pan(hw, vp);
 279
 280         /* chorus & loop end (chorus 8bit, MSB) */
 281         addr = vp->reg.loopend - 1;
 282         temp = vp->reg.parm.chorus;
 283         temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10;
 284         LIMITMAX(temp, 255);
 285         temp = (temp <<24) | (unsigned int)addr;
 286         EMU8000_CSL_WRITE(hw, ch, temp);
 287
 288         /* Q & current address (Q 4bit value, MSB) */
 289         addr = vp->reg.start - 1;
 290         temp = vp->reg.parm.filterQ;
 291         temp = (temp<<28) | (unsigned int)addr;
 292         EMU8000_CCCA_WRITE(hw, ch, temp);
 293
 294         /* clear unknown registers */
 295         EMU8000_00A0_WRITE(hw, ch, 0);
 296         EMU8000_0080_WRITE(hw, ch, 0);
 297
 298         /* reset volume */
 299         temp = vp->vtarget << 16;
 300         EMU8000_VTFT_WRITE(hw, ch, temp | vp->ftarget);
 301         EMU8000_CVCF_WRITE(hw, ch, temp | 0xff00);
 302
 303         return 0;
 304 }
 305
 306 /*
 307  * Start envelope
 308  */
 309 static void
 310 trigger_voice(snd_emux_voice_t *vp)
 311 {
 312         int ch = vp->ch;
 313         unsigned int temp;
 314         emu8000_t *hw;
 315
 316         hw = vp->hw;
 317
 318         /* set reverb and pitch target */
 319         temp = vp->reg.parm.reverb;
 320         temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10;
 321         LIMITMAX(temp, 255);
 322         temp = (temp << 8) | (vp->ptarget << 16) | vp->aaux;
 323         EMU8000_PTRX_WRITE(hw, ch, temp);
 324         EMU8000_CPF_WRITE(hw, ch, vp->ptarget << 16);
 325         EMU8000_DCYSUSV_WRITE(hw, ch, vp->reg.parm.voldcysus);
 326 }
 327
 328 /*
 329  * reset voice parameters
 330  */
 331 static void
 332 reset_voice(snd_emux_t *emu, int ch)
 333 {
 334         emu8000_t *hw;
 335
 336         hw = emu->hw;
 337         EMU8000_DCYSUSV_WRITE(hw, ch, 0x807F);
 338         snd_emu8000_tweak_voice(hw, ch);
 339 }
 340
 341 /*
 342  * Set the pitch of a possibly playing note.
 343  */
 344 static void
 345 set_pitch(emu8000_t *hw, snd_emux_voice_t *vp)
 346 {
 347         EMU8000_IP_WRITE(hw, vp->ch, vp->apitch);
 348 }
 349
 350 /*
 351  * Set the volume of a possibly already playing note
 352  */
 353 static void
 354 set_volume(emu8000_t *hw, snd_emux_voice_t *vp)
 355 {
 356         int  ifatn;
 357
 358         ifatn = (unsigned char)vp->acutoff;
 359         ifatn = (ifatn << 8);
 360         ifatn |= (unsigned char)vp->avol;
 361         EMU8000_IFATN_WRITE(hw, vp->ch, ifatn);
 362 }
 363
 364 /*
 365  * Set pan and loop start address.
 366  */
 367 static void
 368 set_pan(emu8000_t *hw, snd_emux_voice_t *vp)
 369 {
 370         unsigned int temp;
 371
 372         temp = ((unsigned int)vp->apan<<24) | ((unsigned int)vp->reg.loopstart - 1);
 373         EMU8000_PSST_WRITE(hw, vp->ch, temp);
 374 }
 375
 376 #define MOD_SENSE 18
 377
 378 static void
 379 set_fmmod(emu8000_t *hw, snd_emux_voice_t *vp)
 380 {
 381         unsigned short fmmod;
 382         short pitch;
 383         unsigned char cutoff;
 384         int modulation;
 385
 386         pitch = (char)(vp->reg.parm.fmmod>>8);
 387         cutoff = (vp->reg.parm.fmmod & 0xff);
 388         modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
 389         pitch += (MOD_SENSE * modulation) / 1200;
 390         LIMITVALUE(pitch, -128, 127);
 391         fmmod = ((unsigned char)pitch<<8) | cutoff;
 392         EMU8000_FMMOD_WRITE(hw, vp->ch, fmmod);
 393 }
 394
 395 /* set tremolo (lfo1) volume & frequency */
 396 static void
 397 set_tremfreq(emu8000_t *hw, snd_emux_voice_t *vp)
 398 {
 399         EMU8000_TREMFRQ_WRITE(hw, vp->ch, vp->reg.parm.tremfrq);
 400 }
 401
 402 /* set lfo2 pitch & frequency */
 403 static void
 404 set_fm2frq2(emu8000_t *hw, snd_emux_voice_t *vp)
 405 {
 406         unsigned short fm2frq2;
 407         short pitch;
 408         unsigned char freq;
 409         int modulation;
 410
 411         pitch = (char)(vp->reg.parm.fm2frq2>>8);
 412         freq = vp->reg.parm.fm2frq2 & 0xff;
 413         modulation = vp->chan->gm_modulation + vp->chan->midi_pressure;
 414         pitch += (MOD_SENSE * modulation) / 1200;
 415         LIMITVALUE(pitch, -128, 127);
 416         fm2frq2 = ((unsigned char)pitch<<8) | freq;
 417         EMU8000_FM2FRQ2_WRITE(hw, vp->ch, fm2frq2);
 418 }
 419
 420 /* set filterQ */
 421 static void
 422 set_filterQ(emu8000_t *hw, snd_emux_voice_t *vp)
 423 {
 424         unsigned int addr;
 425         addr = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff;
 426         addr |= (vp->reg.parm.filterQ << 28);
 427         EMU8000_CCCA_WRITE(hw, vp->ch, addr);
 428 }
 429
 430 /*
 431  * set the envelope & LFO parameters to the default values
 432  */
 433 static void
 434 snd_emu8000_tweak_voice(emu8000_t *emu, int i)
 435 {
 436         /* set all mod/vol envelope shape to minimum */
 437         EMU8000_ENVVOL_WRITE(emu, i, 0x8000);
 438         EMU8000_ENVVAL_WRITE(emu, i, 0x8000);
 439         EMU8000_DCYSUS_WRITE(emu, i, 0x7F7F);
 440         EMU8000_ATKHLDV_WRITE(emu, i, 0x7F7F);
 441         EMU8000_ATKHLD_WRITE(emu, i, 0x7F7F);
 442         EMU8000_PEFE_WRITE(emu, i, 0);  /* mod envelope height to zero */
 443         EMU8000_LFO1VAL_WRITE(emu, i, 0x8000); /* no delay for LFO1 */
 444         EMU8000_LFO2VAL_WRITE(emu, i, 0x8000);
 445         EMU8000_IP_WRITE(emu, i, 0xE000);       /* no pitch shift */
 446         EMU8000_IFATN_WRITE(emu, i, 0xFF00);    /* volume to minimum */
 447         EMU8000_FMMOD_WRITE(emu, i, 0);
 448         EMU8000_TREMFRQ_WRITE(emu, i, 0);
 449         EMU8000_FM2FRQ2_WRITE(emu, i, 0);
 450 }
 451
 452 /*
 453  * sysex callback
 454  */
 455 static void
 456 sysex(snd_emux_t *emu, char *buf, int len, int parsed, snd_midi_channel_set_t *chset)
 457 {
 458         emu8000_t *hw;
 459
 460         hw = emu->hw;
 461
 462         switch (parsed) {
 463         case SNDRV_MIDI_SYSEX_GS_CHORUS_MODE:
 464                 hw->chorus_mode = chset->gs_chorus_mode;
 465                 snd_emu8000_update_chorus_mode(hw);
 466                 break;
 467
 468         case SNDRV_MIDI_SYSEX_GS_REVERB_MODE:
 469                 hw->reverb_mode = chset->gs_reverb_mode;
 470                 snd_emu8000_update_reverb_mode(hw);
 471                 break;
 472         }
 473 }
 474
 475
 476 #ifdef CONFIG_SND_SEQUENCER_OSS
 477 /*
 478  * OSS ioctl callback
 479  */
 480 static int
 481 oss_ioctl(snd_emux_t *emu, int cmd, int p1, int p2)
 482 {
 483         emu8000_t *hw;
 484
 485         hw = emu->hw;
 486
 487         switch (cmd) {
 488         case _EMUX_OSS_REVERB_MODE:
 489                 hw->reverb_mode = p1;
 490                 snd_emu8000_update_reverb_mode(hw);
 491                 break;
 492
 493         case _EMUX_OSS_CHORUS_MODE:
 494                 hw->chorus_mode = p1;
 495                 snd_emu8000_update_chorus_mode(hw);
 496                 break;
 497
 498         case _EMUX_OSS_INITIALIZE_CHIP:
 499                 /* snd_emu8000_init(hw); */ /*ignored*/
 500                 break;
 501
 502         case _EMUX_OSS_EQUALIZER:
 503                 hw->bass_level = p1;
 504                 hw->treble_level = p2;
 505                 snd_emu8000_update_equalizer(hw);
 506                 break;
 507         }
 508         return 0;
 509 }
 510 #endif
 511
 512
 513 /*
 514  * additional patch keys
 515  */
 516
 517 #define SNDRV_EMU8000_LOAD_CHORUS_FX    0x10    /* optarg=mode */
 518 #define SNDRV_EMU8000_LOAD_REVERB_FX    0x11    /* optarg=mode */
 519
 520
 521 /*
 522  * callback routine
 523  */
 524
 525 static int
 526 load_fx(snd_emux_t *emu, int type, int mode, const void __user *buf, long len)
 527 {
 528         emu8000_t *hw;
 529         hw = emu->hw;
 530
 531         /* skip header */
 532         buf += 16;
 533         len -= 16;
 534
 535         switch (type) {
 536         case SNDRV_EMU8000_LOAD_CHORUS_FX:
 537                 return snd_emu8000_load_chorus_fx(hw, mode, buf, len);
 538         case SNDRV_EMU8000_LOAD_REVERB_FX:
 539                 return snd_emu8000_load_reverb_fx(hw, mode, buf, len);
 540         }
 541         return -EINVAL;
 542 }
 543