sound/drivers/opl3/opl3_synth.c

   1 /*
   2  *  Copyright (c) by Uros Bizjak <uros@kss-loka.si>
   3  *
   4  *  Routines for OPL2/OPL3/OPL4 control
   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 #include <sound/opl3.h>
  23 #include <sound/asound_fm.h>
  24
  25 /*
  26  *    There is 18 possible 2 OP voices
  27  *      (9 in the left and 9 in the right).
  28  *      The first OP is the modulator and 2nd is the carrier.
  29  *
  30  *      The first three voices in the both sides may be connected
  31  *      with another voice to a 4 OP voice. For example voice 0
  32  *      can be connected with voice 3. The operators of voice 3 are
  33  *      used as operators 3 and 4 of the new 4 OP voice.
  34  *      In this case the 2 OP voice number 0 is the 'first half' and
  35  *      voice 3 is the second.
  36  */
  37
  38
  39 /*
  40  *    Register offset table for OPL2/3 voices,
  41  *    OPL2 / one OPL3 register array side only
  42  */
  43
  44 char snd_opl3_regmap[MAX_OPL2_VOICES][4] =
  45 {
  46 /*        OP1   OP2   OP3   OP4         */
  47 /*       ------------------------       */
  48         { 0x00, 0x03, 0x08, 0x0b },
  49         { 0x01, 0x04, 0x09, 0x0c },
  50         { 0x02, 0x05, 0x0a, 0x0d },
  51
  52         { 0x08, 0x0b, 0x00, 0x00 },
  53         { 0x09, 0x0c, 0x00, 0x00 },
  54         { 0x0a, 0x0d, 0x00, 0x00 },
  55
  56         { 0x10, 0x13, 0x00, 0x00 },     /* used by percussive voices */
  57         { 0x11, 0x14, 0x00, 0x00 },     /* if the percussive mode */
  58         { 0x12, 0x15, 0x00, 0x00 }      /* is selected (only left reg block) */
  59 };
  60
  61 EXPORT_SYMBOL(snd_opl3_regmap);
  62
  63 /*
  64  * prototypes
  65  */
  66 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note);
  67 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice);
  68 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params);
  69 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode);
  70 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection);
  71
  72 /* ------------------------------ */
  73
  74 /*
  75  * open the device exclusively
  76  */
  77 int snd_opl3_open(struct snd_hwdep * hw, struct file *file)
  78 {
  79         struct snd_opl3 *opl3 = hw->private_data;
  80
  81         mutex_lock(&opl3->access_mutex);
  82         if (opl3->used) {
  83                 mutex_unlock(&opl3->access_mutex);
  84                 return -EAGAIN;
  85         }
  86         opl3->used++;
  87         mutex_unlock(&opl3->access_mutex);
  88
  89         return 0;
  90 }
  91
  92 /*
  93  * ioctl for hwdep device:
  94  */
  95 int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
  96                    unsigned int cmd, unsigned long arg)
  97 {
  98         struct snd_opl3 *opl3 = hw->private_data;
  99         void __user *argp = (void __user *)arg;
 100
 101         snd_assert(opl3 != NULL, return -EINVAL);
 102
 103         switch (cmd) {
 104                 /* get information */
 105         case SNDRV_DM_FM_IOCTL_INFO:
 106                 {
 107                         struct snd_dm_fm_info info;
 108
 109                         info.fm_mode = opl3->fm_mode;
 110                         info.rhythm = opl3->rhythm;
 111                         if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
 112                                 return -EFAULT;
 113                         return 0;
 114                 }
 115
 116         case SNDRV_DM_FM_IOCTL_RESET:
 117 #ifdef CONFIG_SND_OSSEMUL
 118         case SNDRV_DM_FM_OSS_IOCTL_RESET:
 119 #endif
 120                 snd_opl3_reset(opl3);
 121                 return 0;
 122
 123         case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
 124 #ifdef CONFIG_SND_OSSEMUL
 125         case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
 126 #endif
 127                 {
 128                         struct snd_dm_fm_note note;
 129                         if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
 130                                 return -EFAULT;
 131                         return snd_opl3_play_note(opl3, &note);
 132                 }
 133
 134         case SNDRV_DM_FM_IOCTL_SET_VOICE:
 135 #ifdef CONFIG_SND_OSSEMUL
 136         case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
 137 #endif
 138                 {
 139                         struct snd_dm_fm_voice voice;
 140                         if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
 141                                 return -EFAULT;
 142                         return snd_opl3_set_voice(opl3, &voice);
 143                 }
 144
 145         case SNDRV_DM_FM_IOCTL_SET_PARAMS:
 146 #ifdef CONFIG_SND_OSSEMUL
 147         case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
 148 #endif
 149                 {
 150                         struct snd_dm_fm_params params;
 151                         if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
 152                                 return -EFAULT;
 153                         return snd_opl3_set_params(opl3, &params);
 154                 }
 155
 156         case SNDRV_DM_FM_IOCTL_SET_MODE:
 157 #ifdef CONFIG_SND_OSSEMUL
 158         case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
 159 #endif
 160                 return snd_opl3_set_mode(opl3, (int) arg);
 161
 162         case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
 163 #ifdef CONFIG_SND_OSSEMUL
 164         case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
 165 #endif
 166                 return snd_opl3_set_connection(opl3, (int) arg);
 167
 168 #ifdef CONFIG_SND_DEBUG
 169         default:
 170                 snd_printk("unknown IOCTL: 0x%x\n", cmd);
 171 #endif
 172         }
 173         return -ENOTTY;
 174 }
 175
 176 /*
 177  * close the device
 178  */
 179 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
 180 {
 181         struct snd_opl3 *opl3 = hw->private_data;
 182
 183         snd_opl3_reset(opl3);
 184         mutex_lock(&opl3->access_mutex);
 185         opl3->used--;
 186         mutex_unlock(&opl3->access_mutex);
 187
 188         return 0;
 189 }
 190
 191 /* ------------------------------ */
 192
 193 void snd_opl3_reset(struct snd_opl3 * opl3)
 194 {
 195         unsigned short opl3_reg;
 196
 197         unsigned short reg_side;
 198         unsigned char voice_offset;
 199
 200         int max_voices, i;
 201
 202         max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
 203                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 204
 205         for (i = 0; i < max_voices; i++) {
 206                 /* Get register array side and offset of voice */
 207                 if (i < MAX_OPL2_VOICES) {
 208                         /* Left register block for voices 0 .. 8 */
 209                         reg_side = OPL3_LEFT;
 210                         voice_offset = i;
 211                 } else {
 212                         /* Right register block for voices 9 .. 17 */
 213                         reg_side = OPL3_RIGHT;
 214                         voice_offset = i - MAX_OPL2_VOICES;
 215                 }
 216                 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
 217                 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
 218                 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
 219                 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
 220
 221                 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 222                 opl3->command(opl3, opl3_reg, 0x00);    /* Note off */
 223         }
 224
 225         opl3->max_voices = MAX_OPL2_VOICES;
 226         opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
 227
 228         opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
 229         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);     /* Melodic mode */
 230         opl3->rhythm = 0;
 231 }
 232
 233 EXPORT_SYMBOL(snd_opl3_reset);
 234
 235 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
 236 {
 237         unsigned short reg_side;
 238         unsigned char voice_offset;
 239
 240         unsigned short opl3_reg;
 241         unsigned char reg_val;
 242
 243         /* Voices 0 -  8 in OPL2 mode */
 244         /* Voices 0 - 17 in OPL3 mode */
 245         if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
 246                             MAX_OPL3_VOICES : MAX_OPL2_VOICES))
 247                 return -EINVAL;
 248
 249         /* Get register array side and offset of voice */
 250         if (note->voice < MAX_OPL2_VOICES) {
 251                 /* Left register block for voices 0 .. 8 */
 252                 reg_side = OPL3_LEFT;
 253                 voice_offset = note->voice;
 254         } else {
 255                 /* Right register block for voices 9 .. 17 */
 256                 reg_side = OPL3_RIGHT;
 257                 voice_offset = note->voice - MAX_OPL2_VOICES;
 258         }
 259
 260         /* Set lower 8 bits of note frequency */
 261         reg_val = (unsigned char) note->fnum;
 262         opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
 263         opl3->command(opl3, opl3_reg, reg_val);
 264
 265         reg_val = 0x00;
 266         /* Set output sound flag */
 267         if (note->key_on)
 268                 reg_val |= OPL3_KEYON_BIT;
 269         /* Set octave */
 270         reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
 271         /* Set higher 2 bits of note frequency */
 272         reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
 273
 274         /* Set OPL3 KEYON_BLOCK register of requested voice */
 275         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 276         opl3->command(opl3, opl3_reg, reg_val);
 277
 278         return 0;
 279 }
 280
 281
 282 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
 283 {
 284         unsigned short reg_side;
 285         unsigned char op_offset;
 286         unsigned char voice_offset;
 287
 288         unsigned short opl3_reg;
 289         unsigned char reg_val;
 290
 291         /* Only operators 1 and 2 */
 292         if (voice->op > 1)
 293                 return -EINVAL;
 294         /* Voices 0 -  8 in OPL2 mode */
 295         /* Voices 0 - 17 in OPL3 mode */
 296         if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
 297                              MAX_OPL3_VOICES : MAX_OPL2_VOICES))
 298                 return -EINVAL;
 299
 300         /* Get register array side and offset of voice */
 301         if (voice->voice < MAX_OPL2_VOICES) {
 302                 /* Left register block for voices 0 .. 8 */
 303                 reg_side = OPL3_LEFT;
 304                 voice_offset = voice->voice;
 305         } else {
 306                 /* Right register block for voices 9 .. 17 */
 307                 reg_side = OPL3_RIGHT;
 308                 voice_offset = voice->voice - MAX_OPL2_VOICES;
 309         }
 310         /* Get register offset of operator */
 311         op_offset = snd_opl3_regmap[voice_offset][voice->op];
 312
 313         reg_val = 0x00;
 314         /* Set amplitude modulation (tremolo) effect */
 315         if (voice->am)
 316                 reg_val |= OPL3_TREMOLO_ON;
 317         /* Set vibrato effect */
 318         if (voice->vibrato)
 319                 reg_val |= OPL3_VIBRATO_ON;
 320         /* Set sustaining sound phase */
 321         if (voice->do_sustain)
 322                 reg_val |= OPL3_SUSTAIN_ON;
 323         /* Set keyboard scaling bit */
 324         if (voice->kbd_scale)
 325                 reg_val |= OPL3_KSR;
 326         /* Set harmonic or frequency multiplier */
 327         reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
 328
 329         /* Set OPL3 AM_VIB register of requested voice/operator */
 330         opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
 331         opl3->command(opl3, opl3_reg, reg_val);
 332
 333         /* Set decreasing volume of higher notes */
 334         reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
 335         /* Set output volume */
 336         reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
 337
 338         /* Set OPL3 KSL_LEVEL register of requested voice/operator */
 339         opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
 340         opl3->command(opl3, opl3_reg, reg_val);
 341
 342         /* Set attack phase level */
 343         reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
 344         /* Set decay phase level */
 345         reg_val |= voice->decay & OPL3_DECAY_MASK;
 346
 347         /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
 348         opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
 349         opl3->command(opl3, opl3_reg, reg_val);
 350
 351         /* Set sustain phase level */
 352         reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
 353         /* Set release phase level */
 354         reg_val |= voice->release & OPL3_RELEASE_MASK;
 355
 356         /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
 357         opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
 358         opl3->command(opl3, opl3_reg, reg_val);
 359
 360         /* Set inter-operator feedback */
 361         reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
 362         /* Set inter-operator connection */
 363         if (voice->connection)
 364                 reg_val |= OPL3_CONNECTION_BIT;
 365         /* OPL-3 only */
 366         if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
 367                 if (voice->left)
 368                         reg_val |= OPL3_VOICE_TO_LEFT;
 369                 if (voice->right)
 370                         reg_val |= OPL3_VOICE_TO_RIGHT;
 371         }
 372         /* Feedback/connection bits are applicable to voice */
 373         opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
 374         opl3->command(opl3, opl3_reg, reg_val);
 375
 376         /* Select waveform */
 377         reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
 378         opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
 379         opl3->command(opl3, opl3_reg, reg_val);
 380
 381         return 0;
 382 }
 383
 384 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
 385 {
 386         unsigned char reg_val;
 387
 388         reg_val = 0x00;
 389         /* Set keyboard split method */
 390         if (params->kbd_split)
 391                 reg_val |= OPL3_KEYBOARD_SPLIT;
 392         opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
 393
 394         reg_val = 0x00;
 395         /* Set amplitude modulation (tremolo) depth */
 396         if (params->am_depth)
 397                 reg_val |= OPL3_TREMOLO_DEPTH;
 398         /* Set vibrato depth */
 399         if (params->vib_depth)
 400                 reg_val |= OPL3_VIBRATO_DEPTH;
 401         /* Set percussion mode */
 402         if (params->rhythm) {
 403                 reg_val |= OPL3_PERCUSSION_ENABLE;
 404                 opl3->rhythm = 1;
 405         } else {
 406                 opl3->rhythm = 0;
 407         }
 408         /* Play percussion instruments */
 409         if (params->bass)
 410                 reg_val |= OPL3_BASSDRUM_ON;
 411         if (params->snare)
 412                 reg_val |= OPL3_SNAREDRUM_ON;
 413         if (params->tomtom)
 414                 reg_val |= OPL3_TOMTOM_ON;
 415         if (params->cymbal)
 416                 reg_val |= OPL3_CYMBAL_ON;
 417         if (params->hihat)
 418                 reg_val |= OPL3_HIHAT_ON;
 419
 420         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
 421         return 0;
 422 }
 423
 424 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
 425 {
 426         if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
 427                 return -EINVAL;
 428
 429         opl3->fm_mode = mode;
 430         if (opl3->hardware >= OPL3_HW_OPL3)
 431                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00);     /* Clear 4-op connections */
 432
 433         return 0;
 434 }
 435
 436 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
 437 {
 438         unsigned char reg_val;
 439
 440         /* OPL-3 only */
 441         if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
 442                 return -EINVAL;
 443
 444         reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
 445                                 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
 446         /* Set 4-op connections */
 447         opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
 448
 449         return 0;
 450 }
 451