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         return 0;
  80 }
  81
  82 /*
  83  * ioctl for hwdep device:
  84  */
  85 int snd_opl3_ioctl(struct snd_hwdep * hw, struct file *file,
  86                    unsigned int cmd, unsigned long arg)
  87 {
  88         struct snd_opl3 *opl3 = hw->private_data;
  89         void __user *argp = (void __user *)arg;
  90
  91         snd_assert(opl3 != NULL, return -EINVAL);
  92
  93         switch (cmd) {
  94                 /* get information */
  95         case SNDRV_DM_FM_IOCTL_INFO:
  96                 {
  97                         struct snd_dm_fm_info info;
  98
  99                         info.fm_mode = opl3->fm_mode;
 100                         info.rhythm = opl3->rhythm;
 101                         if (copy_to_user(argp, &info, sizeof(struct snd_dm_fm_info)))
 102                                 return -EFAULT;
 103                         return 0;
 104                 }
 105
 106         case SNDRV_DM_FM_IOCTL_RESET:
 107 #ifdef CONFIG_SND_OSSEMUL
 108         case SNDRV_DM_FM_OSS_IOCTL_RESET:
 109 #endif
 110                 snd_opl3_reset(opl3);
 111                 return 0;
 112
 113         case SNDRV_DM_FM_IOCTL_PLAY_NOTE:
 114 #ifdef CONFIG_SND_OSSEMUL
 115         case SNDRV_DM_FM_OSS_IOCTL_PLAY_NOTE:
 116 #endif
 117                 {
 118                         struct snd_dm_fm_note note;
 119                         if (copy_from_user(&note, argp, sizeof(struct snd_dm_fm_note)))
 120                                 return -EFAULT;
 121                         return snd_opl3_play_note(opl3, &note);
 122                 }
 123
 124         case SNDRV_DM_FM_IOCTL_SET_VOICE:
 125 #ifdef CONFIG_SND_OSSEMUL
 126         case SNDRV_DM_FM_OSS_IOCTL_SET_VOICE:
 127 #endif
 128                 {
 129                         struct snd_dm_fm_voice voice;
 130                         if (copy_from_user(&voice, argp, sizeof(struct snd_dm_fm_voice)))
 131                                 return -EFAULT;
 132                         return snd_opl3_set_voice(opl3, &voice);
 133                 }
 134
 135         case SNDRV_DM_FM_IOCTL_SET_PARAMS:
 136 #ifdef CONFIG_SND_OSSEMUL
 137         case SNDRV_DM_FM_OSS_IOCTL_SET_PARAMS:
 138 #endif
 139                 {
 140                         struct snd_dm_fm_params params;
 141                         if (copy_from_user(&params, argp, sizeof(struct snd_dm_fm_params)))
 142                                 return -EFAULT;
 143                         return snd_opl3_set_params(opl3, &params);
 144                 }
 145
 146         case SNDRV_DM_FM_IOCTL_SET_MODE:
 147 #ifdef CONFIG_SND_OSSEMUL
 148         case SNDRV_DM_FM_OSS_IOCTL_SET_MODE:
 149 #endif
 150                 return snd_opl3_set_mode(opl3, (int) arg);
 151
 152         case SNDRV_DM_FM_IOCTL_SET_CONNECTION:
 153 #ifdef CONFIG_SND_OSSEMUL
 154         case SNDRV_DM_FM_OSS_IOCTL_SET_OPL:
 155 #endif
 156                 return snd_opl3_set_connection(opl3, (int) arg);
 157
 158         case SNDRV_DM_FM_IOCTL_CLEAR_PATCHES:
 159                 snd_opl3_clear_patches(opl3);
 160                 return 0;
 161
 162 #ifdef CONFIG_SND_DEBUG
 163         default:
 164                 snd_printk("unknown IOCTL: 0x%x\n", cmd);
 165 #endif
 166         }
 167         return -ENOTTY;
 168 }
 169
 170 /*
 171  * close the device
 172  */
 173 int snd_opl3_release(struct snd_hwdep * hw, struct file *file)
 174 {
 175         struct snd_opl3 *opl3 = hw->private_data;
 176
 177         snd_opl3_reset(opl3);
 178         return 0;
 179 }
 180
 181 /*
 182  * write the device - load patches
 183  */
 184 long snd_opl3_write(struct snd_hwdep *hw, const char __user *buf, long count,
 185                     loff_t *offset)
 186 {
 187         struct snd_opl3 *opl3 = hw->private_data;
 188         long result = 0;
 189         int err = 0;
 190         struct sbi_patch inst;
 191
 192         while (count >= sizeof(inst)) {
 193                 unsigned char type;
 194                 if (copy_from_user(&inst, buf, sizeof(inst)))
 195                         return -EFAULT;
 196                 if (!memcmp(inst.key, FM_KEY_SBI, 4) ||
 197                     !memcmp(inst.key, FM_KEY_2OP, 4))
 198                         type = FM_PATCH_OPL2;
 199                 else if (!memcmp(inst.key, FM_KEY_4OP, 4))
 200                         type = FM_PATCH_OPL3;
 201                 else /* invalid type */
 202                         break;
 203                 err = snd_opl3_load_patch(opl3, inst.prog, inst.bank, type,
 204                                           inst.name, inst.extension,
 205                                           inst.data);
 206                 if (err < 0)
 207                         break;
 208                 result += sizeof(inst);
 209                 count -= sizeof(inst);
 210         }
 211         return result > 0 ? result : err;
 212 }
 213
 214
 215 /*
 216  * Patch management
 217  */
 218
 219 /* offsets for SBI params */
 220 #define AM_VIB          0
 221 #define KSL_LEVEL       2
 222 #define ATTACK_DECAY    4
 223 #define SUSTAIN_RELEASE 6
 224 #define WAVE_SELECT     8
 225
 226 /* offset for SBI instrument */
 227 #define CONNECTION      10
 228 #define OFFSET_4OP      11
 229
 230 /*
 231  * load a patch, obviously.
 232  *
 233  * loaded on the given program and bank numbers with the given type
 234  * (FM_PATCH_OPLx).
 235  * data is the pointer of SBI record _without_ header (key and name).
 236  * name is the name string of the patch.
 237  * ext is the extension data of 7 bytes long (stored in name of SBI
 238  * data up to offset 25), or NULL to skip.
 239  * return 0 if successful or a negative error code.
 240  */
 241 int snd_opl3_load_patch(struct snd_opl3 *opl3,
 242                         int prog, int bank, int type,
 243                         const char *name,
 244                         const unsigned char *ext,
 245                         const unsigned char *data)
 246 {
 247         struct fm_patch *patch;
 248         int i;
 249
 250         patch = snd_opl3_find_patch(opl3, prog, bank, 1);
 251         if (!patch)
 252                 return -ENOMEM;
 253
 254         patch->type = type;
 255
 256         for (i = 0; i < 2; i++) {
 257                 patch->inst.op[i].am_vib = data[AM_VIB + i];
 258                 patch->inst.op[i].ksl_level = data[KSL_LEVEL + i];
 259                 patch->inst.op[i].attack_decay = data[ATTACK_DECAY + i];
 260                 patch->inst.op[i].sustain_release = data[SUSTAIN_RELEASE + i];
 261                 patch->inst.op[i].wave_select = data[WAVE_SELECT + i];
 262         }
 263         patch->inst.feedback_connection[0] = data[CONNECTION];
 264
 265         if (type == FM_PATCH_OPL3) {
 266                 for (i = 0; i < 2; i++) {
 267                         patch->inst.op[i+2].am_vib =
 268                                 data[OFFSET_4OP + AM_VIB + i];
 269                         patch->inst.op[i+2].ksl_level =
 270                                 data[OFFSET_4OP + KSL_LEVEL + i];
 271                         patch->inst.op[i+2].attack_decay =
 272                                 data[OFFSET_4OP + ATTACK_DECAY + i];
 273                         patch->inst.op[i+2].sustain_release =
 274                                 data[OFFSET_4OP + SUSTAIN_RELEASE + i];
 275                         patch->inst.op[i+2].wave_select =
 276                                 data[OFFSET_4OP + WAVE_SELECT + i];
 277                 }
 278                 patch->inst.feedback_connection[1] =
 279                         data[OFFSET_4OP + CONNECTION];
 280         }
 281
 282         if (ext) {
 283                 patch->inst.echo_delay = ext[0];
 284                 patch->inst.echo_atten = ext[1];
 285                 patch->inst.chorus_spread = ext[2];
 286                 patch->inst.trnsps = ext[3];
 287                 patch->inst.fix_dur = ext[4];
 288                 patch->inst.modes = ext[5];
 289                 patch->inst.fix_key = ext[6];
 290         }
 291
 292         if (name)
 293                 strlcpy(patch->name, name, sizeof(patch->name));
 294
 295         return 0;
 296 }
 297 EXPORT_SYMBOL(snd_opl3_load_patch);
 298
 299 /*
 300  * find a patch with the given program and bank numbers, returns its pointer
 301  * if no matching patch is found and create_patch is set, it creates a
 302  * new patch object.
 303  */
 304 struct fm_patch *snd_opl3_find_patch(struct snd_opl3 *opl3, int prog, int bank,
 305                                      int create_patch)
 306 {
 307         /* pretty dumb hash key */
 308         unsigned int key = (prog + bank) % OPL3_PATCH_HASH_SIZE;
 309         struct fm_patch *patch;
 310
 311         for (patch = opl3->patch_table[key]; patch; patch = patch->next) {
 312                 if (patch->prog == prog && patch->bank == bank)
 313                         return patch;
 314         }
 315         if (!create_patch)
 316                 return NULL;
 317
 318         patch = kzalloc(sizeof(*patch), GFP_KERNEL);
 319         if (!patch)
 320                 return NULL;
 321         patch->prog = prog;
 322         patch->bank = bank;
 323         patch->next = opl3->patch_table[key];
 324         opl3->patch_table[key] = patch;
 325         return patch;
 326 }
 327 EXPORT_SYMBOL(snd_opl3_find_patch);
 328
 329 /*
 330  * Clear all patches of the given OPL3 instance
 331  */
 332 void snd_opl3_clear_patches(struct snd_opl3 *opl3)
 333 {
 334         int i;
 335         for (i = 0; i <  OPL3_PATCH_HASH_SIZE; i++) {
 336                 struct fm_patch *patch, *next;
 337                 for (patch = opl3->patch_table[i]; patch; patch = next) {
 338                         next = patch->next;
 339                         kfree(patch);
 340                 }
 341         }
 342         memset(opl3->patch_table, 0, sizeof(opl3->patch_table));
 343 }
 344
 345 /* ------------------------------ */
 346
 347 void snd_opl3_reset(struct snd_opl3 * opl3)
 348 {
 349         unsigned short opl3_reg;
 350
 351         unsigned short reg_side;
 352         unsigned char voice_offset;
 353
 354         int max_voices, i;
 355
 356         max_voices = (opl3->hardware < OPL3_HW_OPL3) ?
 357                 MAX_OPL2_VOICES : MAX_OPL3_VOICES;
 358
 359         for (i = 0; i < max_voices; i++) {
 360                 /* Get register array side and offset of voice */
 361                 if (i < MAX_OPL2_VOICES) {
 362                         /* Left register block for voices 0 .. 8 */
 363                         reg_side = OPL3_LEFT;
 364                         voice_offset = i;
 365                 } else {
 366                         /* Right register block for voices 9 .. 17 */
 367                         reg_side = OPL3_RIGHT;
 368                         voice_offset = i - MAX_OPL2_VOICES;
 369                 }
 370                 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][0]);
 371                 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 1 volume */
 372                 opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + snd_opl3_regmap[voice_offset][1]);
 373                 opl3->command(opl3, opl3_reg, OPL3_TOTAL_LEVEL_MASK); /* Operator 2 volume */
 374
 375                 opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 376                 opl3->command(opl3, opl3_reg, 0x00);    /* Note off */
 377         }
 378
 379         opl3->max_voices = MAX_OPL2_VOICES;
 380         opl3->fm_mode = SNDRV_DM_FM_MODE_OPL2;
 381
 382         opl3->command(opl3, OPL3_LEFT | OPL3_REG_TEST, OPL3_ENABLE_WAVE_SELECT);
 383         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, 0x00);     /* Melodic mode */
 384         opl3->rhythm = 0;
 385 }
 386
 387 EXPORT_SYMBOL(snd_opl3_reset);
 388
 389 static int snd_opl3_play_note(struct snd_opl3 * opl3, struct snd_dm_fm_note * note)
 390 {
 391         unsigned short reg_side;
 392         unsigned char voice_offset;
 393
 394         unsigned short opl3_reg;
 395         unsigned char reg_val;
 396
 397         /* Voices 0 -  8 in OPL2 mode */
 398         /* Voices 0 - 17 in OPL3 mode */
 399         if (note->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
 400                             MAX_OPL3_VOICES : MAX_OPL2_VOICES))
 401                 return -EINVAL;
 402
 403         /* Get register array side and offset of voice */
 404         if (note->voice < MAX_OPL2_VOICES) {
 405                 /* Left register block for voices 0 .. 8 */
 406                 reg_side = OPL3_LEFT;
 407                 voice_offset = note->voice;
 408         } else {
 409                 /* Right register block for voices 9 .. 17 */
 410                 reg_side = OPL3_RIGHT;
 411                 voice_offset = note->voice - MAX_OPL2_VOICES;
 412         }
 413
 414         /* Set lower 8 bits of note frequency */
 415         reg_val = (unsigned char) note->fnum;
 416         opl3_reg = reg_side | (OPL3_REG_FNUM_LOW + voice_offset);
 417         opl3->command(opl3, opl3_reg, reg_val);
 418
 419         reg_val = 0x00;
 420         /* Set output sound flag */
 421         if (note->key_on)
 422                 reg_val |= OPL3_KEYON_BIT;
 423         /* Set octave */
 424         reg_val |= (note->octave << 2) & OPL3_BLOCKNUM_MASK;
 425         /* Set higher 2 bits of note frequency */
 426         reg_val |= (unsigned char) (note->fnum >> 8) & OPL3_FNUM_HIGH_MASK;
 427
 428         /* Set OPL3 KEYON_BLOCK register of requested voice */
 429         opl3_reg = reg_side | (OPL3_REG_KEYON_BLOCK + voice_offset);
 430         opl3->command(opl3, opl3_reg, reg_val);
 431
 432         return 0;
 433 }
 434
 435
 436 static int snd_opl3_set_voice(struct snd_opl3 * opl3, struct snd_dm_fm_voice * voice)
 437 {
 438         unsigned short reg_side;
 439         unsigned char op_offset;
 440         unsigned char voice_offset;
 441
 442         unsigned short opl3_reg;
 443         unsigned char reg_val;
 444
 445         /* Only operators 1 and 2 */
 446         if (voice->op > 1)
 447                 return -EINVAL;
 448         /* Voices 0 -  8 in OPL2 mode */
 449         /* Voices 0 - 17 in OPL3 mode */
 450         if (voice->voice >= ((opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) ?
 451                              MAX_OPL3_VOICES : MAX_OPL2_VOICES))
 452                 return -EINVAL;
 453
 454         /* Get register array side and offset of voice */
 455         if (voice->voice < MAX_OPL2_VOICES) {
 456                 /* Left register block for voices 0 .. 8 */
 457                 reg_side = OPL3_LEFT;
 458                 voice_offset = voice->voice;
 459         } else {
 460                 /* Right register block for voices 9 .. 17 */
 461                 reg_side = OPL3_RIGHT;
 462                 voice_offset = voice->voice - MAX_OPL2_VOICES;
 463         }
 464         /* Get register offset of operator */
 465         op_offset = snd_opl3_regmap[voice_offset][voice->op];
 466
 467         reg_val = 0x00;
 468         /* Set amplitude modulation (tremolo) effect */
 469         if (voice->am)
 470                 reg_val |= OPL3_TREMOLO_ON;
 471         /* Set vibrato effect */
 472         if (voice->vibrato)
 473                 reg_val |= OPL3_VIBRATO_ON;
 474         /* Set sustaining sound phase */
 475         if (voice->do_sustain)
 476                 reg_val |= OPL3_SUSTAIN_ON;
 477         /* Set keyboard scaling bit */
 478         if (voice->kbd_scale)
 479                 reg_val |= OPL3_KSR;
 480         /* Set harmonic or frequency multiplier */
 481         reg_val |= voice->harmonic & OPL3_MULTIPLE_MASK;
 482
 483         /* Set OPL3 AM_VIB register of requested voice/operator */
 484         opl3_reg = reg_side | (OPL3_REG_AM_VIB + op_offset);
 485         opl3->command(opl3, opl3_reg, reg_val);
 486
 487         /* Set decreasing volume of higher notes */
 488         reg_val = (voice->scale_level << 6) & OPL3_KSL_MASK;
 489         /* Set output volume */
 490         reg_val |= ~voice->volume & OPL3_TOTAL_LEVEL_MASK;
 491
 492         /* Set OPL3 KSL_LEVEL register of requested voice/operator */
 493         opl3_reg = reg_side | (OPL3_REG_KSL_LEVEL + op_offset);
 494         opl3->command(opl3, opl3_reg, reg_val);
 495
 496         /* Set attack phase level */
 497         reg_val = (voice->attack << 4) & OPL3_ATTACK_MASK;
 498         /* Set decay phase level */
 499         reg_val |= voice->decay & OPL3_DECAY_MASK;
 500
 501         /* Set OPL3 ATTACK_DECAY register of requested voice/operator */
 502         opl3_reg = reg_side | (OPL3_REG_ATTACK_DECAY + op_offset);
 503         opl3->command(opl3, opl3_reg, reg_val);
 504
 505         /* Set sustain phase level */
 506         reg_val = (voice->sustain << 4) & OPL3_SUSTAIN_MASK;
 507         /* Set release phase level */
 508         reg_val |= voice->release & OPL3_RELEASE_MASK;
 509
 510         /* Set OPL3 SUSTAIN_RELEASE register of requested voice/operator */
 511         opl3_reg = reg_side | (OPL3_REG_SUSTAIN_RELEASE + op_offset);
 512         opl3->command(opl3, opl3_reg, reg_val);
 513
 514         /* Set inter-operator feedback */
 515         reg_val = (voice->feedback << 1) & OPL3_FEEDBACK_MASK;
 516         /* Set inter-operator connection */
 517         if (voice->connection)
 518                 reg_val |= OPL3_CONNECTION_BIT;
 519         /* OPL-3 only */
 520         if (opl3->fm_mode == SNDRV_DM_FM_MODE_OPL3) {
 521                 if (voice->left)
 522                         reg_val |= OPL3_VOICE_TO_LEFT;
 523                 if (voice->right)
 524                         reg_val |= OPL3_VOICE_TO_RIGHT;
 525         }
 526         /* Feedback/connection bits are applicable to voice */
 527         opl3_reg = reg_side | (OPL3_REG_FEEDBACK_CONNECTION + voice_offset);
 528         opl3->command(opl3, opl3_reg, reg_val);
 529
 530         /* Select waveform */
 531         reg_val = voice->waveform & OPL3_WAVE_SELECT_MASK;
 532         opl3_reg = reg_side | (OPL3_REG_WAVE_SELECT + op_offset);
 533         opl3->command(opl3, opl3_reg, reg_val);
 534
 535         return 0;
 536 }
 537
 538 static int snd_opl3_set_params(struct snd_opl3 * opl3, struct snd_dm_fm_params * params)
 539 {
 540         unsigned char reg_val;
 541
 542         reg_val = 0x00;
 543         /* Set keyboard split method */
 544         if (params->kbd_split)
 545                 reg_val |= OPL3_KEYBOARD_SPLIT;
 546         opl3->command(opl3, OPL3_LEFT | OPL3_REG_KBD_SPLIT, reg_val);
 547
 548         reg_val = 0x00;
 549         /* Set amplitude modulation (tremolo) depth */
 550         if (params->am_depth)
 551                 reg_val |= OPL3_TREMOLO_DEPTH;
 552         /* Set vibrato depth */
 553         if (params->vib_depth)
 554                 reg_val |= OPL3_VIBRATO_DEPTH;
 555         /* Set percussion mode */
 556         if (params->rhythm) {
 557                 reg_val |= OPL3_PERCUSSION_ENABLE;
 558                 opl3->rhythm = 1;
 559         } else {
 560                 opl3->rhythm = 0;
 561         }
 562         /* Play percussion instruments */
 563         if (params->bass)
 564                 reg_val |= OPL3_BASSDRUM_ON;
 565         if (params->snare)
 566                 reg_val |= OPL3_SNAREDRUM_ON;
 567         if (params->tomtom)
 568                 reg_val |= OPL3_TOMTOM_ON;
 569         if (params->cymbal)
 570                 reg_val |= OPL3_CYMBAL_ON;
 571         if (params->hihat)
 572                 reg_val |= OPL3_HIHAT_ON;
 573
 574         opl3->command(opl3, OPL3_LEFT | OPL3_REG_PERCUSSION, reg_val);
 575         return 0;
 576 }
 577
 578 static int snd_opl3_set_mode(struct snd_opl3 * opl3, int mode)
 579 {
 580         if ((mode == SNDRV_DM_FM_MODE_OPL3) && (opl3->hardware < OPL3_HW_OPL3))
 581                 return -EINVAL;
 582
 583         opl3->fm_mode = mode;
 584         if (opl3->hardware >= OPL3_HW_OPL3)
 585                 opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, 0x00);     /* Clear 4-op connections */
 586
 587         return 0;
 588 }
 589
 590 static int snd_opl3_set_connection(struct snd_opl3 * opl3, int connection)
 591 {
 592         unsigned char reg_val;
 593
 594         /* OPL-3 only */
 595         if (opl3->fm_mode != SNDRV_DM_FM_MODE_OPL3)
 596                 return -EINVAL;
 597
 598         reg_val = connection & (OPL3_RIGHT_4OP_0 | OPL3_RIGHT_4OP_1 | OPL3_RIGHT_4OP_2 |
 599                                 OPL3_LEFT_4OP_0 | OPL3_LEFT_4OP_1 | OPL3_LEFT_4OP_2);
 600         /* Set 4-op connections */
 601         opl3->command(opl3, OPL3_RIGHT | OPL3_REG_CONNECTION_SELECT, reg_val);
 602
 603         return 0;
 604 }
 605