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   1 /*
   2  * sound/oss/opl3.c
   3  *
   4  * A low level driver for Yamaha YM3812 and OPL-3 -chips
   5  *
   6  *
   7  * Copyright (C) by Hannu Savolainen 1993-1997
   8  *
   9  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  10  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  11  * for more info.
  12  *
  13  *
  14  * Changes
  15  *      Thomas Sailer           ioctl code reworked (vmalloc/vfree removed)
  16  *      Alan Cox                modularisation, fixed sound_mem allocs.
  17  *      Christoph Hellwig       Adapted to module_init/module_exit
  18  *      Arnaldo C. de Melo      get rid of check_region, use request_region for
  19  *                              OPL4, release it on exit, some cleanups.
  20  *
  21  * Status
  22  *      Believed to work. Badly needs rewriting a bit to support multiple
  23  *      OPL3 devices.
  24  */
  25
  26 #include <linux/init.h>
  27 #include <linux/module.h>
  28 #include <linux/delay.h>
  29
  30 /*
  31  * Major improvements to the FM handling 30AUG92 by Rob Hooft,
  32  * hooft@chem.ruu.nl
  33  */
  34
  35 #include "sound_config.h"
  36
  37 #include "opl3_hw.h"
  38
  39 #define MAX_VOICE       18
  40 #define OFFS_4OP        11
  41
  42 struct voice_info
  43 {
  44         unsigned char   keyon_byte;
  45         long            bender;
  46         long            bender_range;
  47         unsigned long   orig_freq;
  48         unsigned long   current_freq;
  49         int             volume;
  50         int             mode;
  51         int             panning;        /* 0xffff means not set */
  52 };
  53
  54 typedef struct opl_devinfo
  55 {
  56         int             base;
  57         int             left_io, right_io;
  58         int             nr_voice;
  59         int             lv_map[MAX_VOICE];
  60
  61         struct voice_info voc[MAX_VOICE];
  62         struct voice_alloc_info *v_alloc;
  63         struct channel_info *chn_info;
  64
  65         struct sbi_instrument i_map[SBFM_MAXINSTR];
  66         struct sbi_instrument *act_i[MAX_VOICE];
  67
  68         struct synth_info fm_info;
  69
  70         int             busy;
  71         int             model;
  72         unsigned char   cmask;
  73
  74         int             is_opl4;
  75 } opl_devinfo;
  76
  77 static struct opl_devinfo *devc = NULL;
  78
  79 static int      detected_model;
  80
  81 static int      store_instr(int instr_no, struct sbi_instrument *instr);
  82 static void     freq_to_fnum(int freq, int *block, int *fnum);
  83 static void     opl3_command(int io_addr, unsigned int addr, unsigned int val);
  84 static int      opl3_kill_note(int dev, int voice, int note, int velocity);
  85
  86 static void enter_4op_mode(void)
  87 {
  88         int i;
  89         static int v4op[MAX_VOICE] = {
  90                 0, 1, 2, 9, 10, 11, 6, 7, 8, 15, 16, 17
  91         };
  92
  93         devc->cmask = 0x3f;     /* Connect all possible 4 OP voice operators */
  94         opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, 0x3f);
  95
  96         for (i = 0; i < 3; i++)
  97                 pv_map[i].voice_mode = 4;
  98         for (i = 3; i < 6; i++)
  99                 pv_map[i].voice_mode = 0;
 100
 101         for (i = 9; i < 12; i++)
 102                 pv_map[i].voice_mode = 4;
 103         for (i = 12; i < 15; i++)
 104                 pv_map[i].voice_mode = 0;
 105
 106         for (i = 0; i < 12; i++)
 107                 devc->lv_map[i] = v4op[i];
 108         devc->v_alloc->max_voice = devc->nr_voice = 12;
 109 }
 110
 111 static int opl3_ioctl(int dev, unsigned int cmd, void __user * arg)
 112 {
 113         struct sbi_instrument ins;
 114
 115         switch (cmd) {
 116                 case SNDCTL_FM_LOAD_INSTR:
 117                         printk(KERN_WARNING "Warning: Obsolete ioctl(SNDCTL_FM_LOAD_INSTR) used. Fix the program.\n");
 118                         if (copy_from_user(&ins, arg, sizeof(ins)))
 119                                 return -EFAULT;
 120                         if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR) {
 121                                 printk(KERN_WARNING "FM Error: Invalid instrument number %d\n", ins.channel);
 122                                 return -EINVAL;
 123                         }
 124                         return store_instr(ins.channel, &ins);
 125
 126                 case SNDCTL_SYNTH_INFO:
 127                         devc->fm_info.nr_voices = (devc->nr_voice == 12) ? 6 : devc->nr_voice;
 128                         if (copy_to_user(arg, &devc->fm_info, sizeof(devc->fm_info)))
 129                                 return -EFAULT;
 130                         return 0;
 131
 132                 case SNDCTL_SYNTH_MEMAVL:
 133                         return 0x7fffffff;
 134
 135                 case SNDCTL_FM_4OP_ENABLE:
 136                         if (devc->model == 2)
 137                                 enter_4op_mode();
 138                         return 0;
 139
 140                 default:
 141                         return -EINVAL;
 142         }
 143 }
 144
 145 static int opl3_detect(int ioaddr)
 146 {
 147         /*
 148          * This function returns 1 if the FM chip is present at the given I/O port
 149          * The detection algorithm plays with the timer built in the FM chip and
 150          * looks for a change in the status register.
 151          *
 152          * Note! The timers of the FM chip are not connected to AdLib (and compatible)
 153          * boards.
 154          *
 155          * Note2! The chip is initialized if detected.
 156          */
 157
 158         unsigned char stat1, signature;
 159         int i;
 160
 161         if (devc != NULL)
 162         {
 163                 printk(KERN_ERR "opl3: Only one OPL3 supported.\n");
 164                 return 0;
 165         }
 166
 167         devc = kzalloc(sizeof(*devc), GFP_KERNEL);
 168
 169         if (devc == NULL)
 170         {
 171                 printk(KERN_ERR "opl3: Can't allocate memory for the device control "
 172                         "structure \n ");
 173                 return 0;
 174         }
 175
 176         strcpy(devc->fm_info.name, "OPL2");
 177
 178         if (!request_region(ioaddr, 4, devc->fm_info.name)) {
 179                 printk(KERN_WARNING "opl3: I/O port 0x%x already in use\n", ioaddr);
 180                 goto cleanup_devc;
 181         }
 182
 183         devc->base = ioaddr;
 184
 185         /* Reset timers 1 and 2 */
 186         opl3_command(ioaddr, TIMER_CONTROL_REGISTER, TIMER1_MASK | TIMER2_MASK);
 187
 188         /* Reset the IRQ of the FM chip */
 189         opl3_command(ioaddr, TIMER_CONTROL_REGISTER, IRQ_RESET);
 190
 191         signature = stat1 = inb(ioaddr);        /* Status register */
 192
 193         if (signature != 0x00 && signature != 0x06 && signature != 0x02 &&
 194                 signature != 0x0f)
 195         {
 196                 MDB(printk(KERN_INFO "OPL3 not detected %x\n", signature));
 197                 goto cleanup_region;
 198         }
 199
 200         if (signature == 0x06)          /* OPL2 */
 201         {
 202                 detected_model = 2;
 203         }
 204         else if (signature == 0x00 || signature == 0x0f)        /* OPL3 or OPL4 */
 205         {
 206                 unsigned char tmp;
 207
 208                 detected_model = 3;
 209
 210                 /*
 211                  * Detect availability of OPL4 (_experimental_). Works probably
 212                  * only after a cold boot. In addition the OPL4 port
 213                  * of the chip may not be connected to the PC bus at all.
 214                  */
 215
 216                 opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0x00);
 217                 opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, OPL3_ENABLE | OPL4_ENABLE);
 218
 219                 if ((tmp = inb(ioaddr)) == 0x02)        /* Have a OPL4 */
 220                 {
 221                         detected_model = 4;
 222                 }
 223
 224                 if (request_region(ioaddr - 8, 2, "OPL4"))      /* OPL4 port was free */
 225                 {
 226                         int tmp;
 227
 228                         outb((0x02), ioaddr - 8);       /* Select OPL4 ID register */
 229                         udelay(10);
 230                         tmp = inb(ioaddr - 7);          /* Read it */
 231                         udelay(10);
 232
 233                         if (tmp == 0x20)        /* OPL4 should return 0x20 here */
 234                         {
 235                                 detected_model = 4;
 236                                 outb((0xF8), ioaddr - 8);       /* Select OPL4 FM mixer control */
 237                                 udelay(10);
 238                                 outb((0x1B), ioaddr - 7);       /* Write value */
 239                                 udelay(10);
 240                         }
 241                         else
 242                         { /* release OPL4 port */
 243                                 release_region(ioaddr - 8, 2);
 244                                 detected_model = 3;
 245                         }
 246                 }
 247                 opl3_command(ioaddr + 2, OPL3_MODE_REGISTER, 0);
 248         }
 249         for (i = 0; i < 9; i++)
 250                 opl3_command(ioaddr, KEYON_BLOCK + i, 0);       /*
 251                                                                  * Note off
 252                                                                  */
 253
 254         opl3_command(ioaddr, TEST_REGISTER, ENABLE_WAVE_SELECT);
 255         opl3_command(ioaddr, PERCOSSION_REGISTER, 0x00);        /*
 256                                                                  * Melodic mode.
 257                                                                  */
 258         return 1;
 259 cleanup_region:
 260         release_region(ioaddr, 4);
 261 cleanup_devc:
 262         kfree(devc);
 263         devc = NULL;
 264         return 0;
 265 }
 266
 267 static int opl3_kill_note  (int devno, int voice, int note, int velocity)
 268 {
 269          struct physical_voice_info *map;
 270
 271          if (voice < 0 || voice >= devc->nr_voice)
 272                  return 0;
 273
 274          devc->v_alloc->map[voice] = 0;
 275
 276          map = &pv_map[devc->lv_map[voice]];
 277          DEB(printk("Kill note %d\n", voice));
 278
 279          if (map->voice_mode == 0)
 280                  return 0;
 281
 282          opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, devc->voc[voice].keyon_byte & ~0x20);
 283          devc->voc[voice].keyon_byte = 0;
 284          devc->voc[voice].bender = 0;
 285          devc->voc[voice].volume = 64;
 286          devc->voc[voice].panning = 0xffff;     /* Not set */
 287          devc->voc[voice].bender_range = 200;
 288          devc->voc[voice].orig_freq = 0;
 289          devc->voc[voice].current_freq = 0;
 290          devc->voc[voice].mode = 0;
 291          return 0;
 292 }
 293
 294 #define HIHAT                   0
 295 #define CYMBAL                  1
 296 #define TOMTOM                  2
 297 #define SNARE                   3
 298 #define BDRUM                   4
 299 #define UNDEFINED               TOMTOM
 300 #define DEFAULT                 TOMTOM
 301
 302 static int store_instr(int instr_no, struct sbi_instrument *instr)
 303 {
 304         if (instr->key != FM_PATCH && (instr->key != OPL3_PATCH || devc->model != 2))
 305                 printk(KERN_WARNING "FM warning: Invalid patch format field (key) 0x%x\n", instr->key);
 306         memcpy((char *) &(devc->i_map[instr_no]), (char *) instr, sizeof(*instr));
 307         return 0;
 308 }
 309
 310 static int opl3_set_instr  (int dev, int voice, int instr_no)
 311 {
 312         if (voice < 0 || voice >= devc->nr_voice)
 313                 return 0;
 314         if (instr_no < 0 || instr_no >= SBFM_MAXINSTR)
 315                 instr_no = 0;   /* Acoustic piano (usually) */
 316
 317         devc->act_i[voice] = &devc->i_map[instr_no];
 318         return 0;
 319 }
 320
 321 /*
 322  * The next table looks magical, but it certainly is not. Its values have
 323  * been calculated as table[i]=8*log(i/64)/log(2) with an obvious exception
 324  * for i=0. This log-table converts a linear volume-scaling (0..127) to a
 325  * logarithmic scaling as present in the FM-synthesizer chips. so :    Volume
 326  * 64 =  0 db = relative volume  0 and:    Volume 32 = -6 db = relative
 327  * volume -8 it was implemented as a table because it is only 128 bytes and
 328  * it saves a lot of log() calculations. (RH)
 329  */
 330
 331 static char fm_volume_table[128] =
 332 {
 333         -64, -48, -40, -35, -32, -29, -27, -26,
 334         -24, -23, -21, -20, -19, -18, -18, -17,
 335         -16, -15, -15, -14, -13, -13, -12, -12,
 336         -11, -11, -10, -10, -10, -9, -9, -8,
 337         -8, -8, -7, -7, -7, -6, -6, -6,
 338         -5, -5, -5, -5, -4, -4, -4, -4,
 339         -3, -3, -3, -3, -2, -2, -2, -2,
 340         -2, -1, -1, -1, -1, 0, 0, 0,
 341         0, 0, 0, 1, 1, 1, 1, 1,
 342         1, 2, 2, 2, 2, 2, 2, 2,
 343         3, 3, 3, 3, 3, 3, 3, 4,
 344         4, 4, 4, 4, 4, 4, 4, 5,
 345         5, 5, 5, 5, 5, 5, 5, 5,
 346         6, 6, 6, 6, 6, 6, 6, 6,
 347         6, 7, 7, 7, 7, 7, 7, 7,
 348         7, 7, 7, 8, 8, 8, 8, 8
 349 };
 350
 351 static void calc_vol(unsigned char *regbyte, int volume, int main_vol)
 352 {
 353         int level = (~*regbyte & 0x3f);
 354
 355         if (main_vol > 127)
 356                 main_vol = 127;
 357         volume = (volume * main_vol) / 127;
 358
 359         if (level)
 360                 level += fm_volume_table[volume];
 361
 362         if (level > 0x3f)
 363                 level = 0x3f;
 364         if (level < 0)
 365                 level = 0;
 366
 367         *regbyte = (*regbyte & 0xc0) | (~level & 0x3f);
 368 }
 369
 370 static void set_voice_volume(int voice, int volume, int main_vol)
 371 {
 372         unsigned char vol1, vol2, vol3, vol4;
 373         struct sbi_instrument *instr;
 374         struct physical_voice_info *map;
 375
 376         if (voice < 0 || voice >= devc->nr_voice)
 377                 return;
 378
 379         map = &pv_map[devc->lv_map[voice]];
 380         instr = devc->act_i[voice];
 381
 382         if (!instr)
 383                 instr = &devc->i_map[0];
 384
 385         if (instr->channel < 0)
 386                 return;
 387
 388         if (devc->voc[voice].mode == 0)
 389                 return;
 390
 391         if (devc->voc[voice].mode == 2)
 392         {
 393                 vol1 = instr->operators[2];
 394                 vol2 = instr->operators[3];
 395                 if ((instr->operators[10] & 0x01))
 396                 {
 397                         calc_vol(&vol1, volume, main_vol);
 398                         calc_vol(&vol2, volume, main_vol);
 399                 }
 400                 else
 401                 {
 402                         calc_vol(&vol2, volume, main_vol);
 403                 }
 404                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
 405                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
 406         }
 407         else
 408         {       /*
 409                  * 4 OP voice
 410                  */
 411                 int connection;
 412
 413                 vol1 = instr->operators[2];
 414                 vol2 = instr->operators[3];
 415                 vol3 = instr->operators[OFFS_4OP + 2];
 416                 vol4 = instr->operators[OFFS_4OP + 3];
 417
 418                 /*
 419                  * The connection method for 4 OP devc->voc is defined by the rightmost
 420                  * bits at the offsets 10 and 10+OFFS_4OP
 421                  */
 422
 423                 connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
 424
 425                 switch (connection)
 426                 {
 427                         case 0:
 428                                 calc_vol(&vol4, volume, main_vol);
 429                                 break;
 430
 431                         case 1:
 432                                 calc_vol(&vol2, volume, main_vol);
 433                                 calc_vol(&vol4, volume, main_vol);
 434                                 break;
 435
 436                         case 2:
 437                                 calc_vol(&vol1, volume, main_vol);
 438                                 calc_vol(&vol4, volume, main_vol);
 439                                 break;
 440
 441                         case 3:
 442                                 calc_vol(&vol1, volume, main_vol);
 443                                 calc_vol(&vol3, volume, main_vol);
 444                                 calc_vol(&vol4, volume, main_vol);
 445                                 break;
 446
 447                         default:
 448                                 ;
 449                 }
 450                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], vol1);
 451                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], vol2);
 452                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], vol3);
 453                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], vol4);
 454         }
 455 }
 456
 457 static int opl3_start_note (int dev, int voice, int note, int volume)
 458 {
 459         unsigned char data, fpc;
 460         int block, fnum, freq, voice_mode, pan;
 461         struct sbi_instrument *instr;
 462         struct physical_voice_info *map;
 463
 464         if (voice < 0 || voice >= devc->nr_voice)
 465                 return 0;
 466
 467         map = &pv_map[devc->lv_map[voice]];
 468         pan = devc->voc[voice].panning;
 469
 470         if (map->voice_mode == 0)
 471                 return 0;
 472
 473         if (note == 255)        /*
 474                                  * Just change the volume
 475                                  */
 476         {
 477                 set_voice_volume(voice, volume, devc->voc[voice].volume);
 478                 return 0;
 479         }
 480
 481         /*
 482          * Kill previous note before playing
 483          */
 484
 485         opl3_command(map->ioaddr, KSL_LEVEL + map->op[1], 0xff);        /*
 486                                                                          * Carrier
 487                                                                          * volume to
 488                                                                          * min
 489                                                                          */
 490         opl3_command(map->ioaddr, KSL_LEVEL + map->op[0], 0xff);        /*
 491                                                                          * Modulator
 492                                                                          * volume to
 493                                                                          */
 494
 495         if (map->voice_mode == 4)
 496         {
 497                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[2], 0xff);
 498                 opl3_command(map->ioaddr, KSL_LEVEL + map->op[3], 0xff);
 499         }
 500
 501         opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, 0x00);  /*
 502                                                                          * Note
 503                                                                          * off
 504                                                                          */
 505
 506         instr = devc->act_i[voice];
 507
 508         if (!instr)
 509                 instr = &devc->i_map[0];
 510
 511         if (instr->channel < 0)
 512         {
 513                 printk(KERN_WARNING "opl3: Initializing voice %d with undefined instrument\n", voice);
 514                 return 0;
 515         }
 516
 517         if (map->voice_mode == 2 && instr->key == OPL3_PATCH)
 518                 return 0;       /*
 519                                  * Cannot play
 520                                  */
 521
 522         voice_mode = map->voice_mode;
 523
 524         if (voice_mode == 4)
 525         {
 526                 int voice_shift;
 527
 528                 voice_shift = (map->ioaddr == devc->left_io) ? 0 : 3;
 529                 voice_shift += map->voice_num;
 530
 531                 if (instr->key != OPL3_PATCH)   /*
 532                                                  * Just 2 OP patch
 533                                                  */
 534                 {
 535                         voice_mode = 2;
 536                         devc->cmask &= ~(1 << voice_shift);
 537                 }
 538                 else
 539                 {
 540                         devc->cmask |= (1 << voice_shift);
 541                 }
 542
 543                 opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
 544         }
 545
 546         /*
 547          * Set Sound Characteristics
 548          */
 549
 550         opl3_command(map->ioaddr, AM_VIB + map->op[0], instr->operators[0]);
 551         opl3_command(map->ioaddr, AM_VIB + map->op[1], instr->operators[1]);
 552
 553         /*
 554          * Set Attack/Decay
 555          */
 556
 557         opl3_command(map->ioaddr, ATTACK_DECAY + map->op[0], instr->operators[4]);
 558         opl3_command(map->ioaddr, ATTACK_DECAY + map->op[1], instr->operators[5]);
 559
 560         /*
 561          * Set Sustain/Release
 562          */
 563
 564         opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[0], instr->operators[6]);
 565         opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[1], instr->operators[7]);
 566
 567         /*
 568          * Set Wave Select
 569          */
 570
 571         opl3_command(map->ioaddr, WAVE_SELECT + map->op[0], instr->operators[8]);
 572         opl3_command(map->ioaddr, WAVE_SELECT + map->op[1], instr->operators[9]);
 573
 574         /*
 575          * Set Feedback/Connection
 576          */
 577
 578         fpc = instr->operators[10];
 579
 580         if (pan != 0xffff)
 581         {
 582                 fpc &= ~STEREO_BITS;
 583                 if (pan < -64)
 584                         fpc |= VOICE_TO_LEFT;
 585                 else
 586                         if (pan > 64)
 587                                 fpc |= VOICE_TO_RIGHT;
 588                         else
 589                                 fpc |= (VOICE_TO_LEFT | VOICE_TO_RIGHT);
 590         }
 591
 592         if (!(fpc & 0x30))
 593                 fpc |= 0x30;    /*
 594                                  * Ensure that at least one chn is enabled
 595                                  */
 596         opl3_command(map->ioaddr, FEEDBACK_CONNECTION + map->voice_num, fpc);
 597
 598         /*
 599          * If the voice is a 4 OP one, initialize the operators 3 and 4 also
 600          */
 601
 602         if (voice_mode == 4)
 603         {
 604                 /*
 605                  * Set Sound Characteristics
 606                  */
 607
 608                 opl3_command(map->ioaddr, AM_VIB + map->op[2], instr->operators[OFFS_4OP + 0]);
 609                 opl3_command(map->ioaddr, AM_VIB + map->op[3], instr->operators[OFFS_4OP + 1]);
 610
 611                 /*
 612                  * Set Attack/Decay
 613                  */
 614
 615                 opl3_command(map->ioaddr, ATTACK_DECAY + map->op[2], instr->operators[OFFS_4OP + 4]);
 616                 opl3_command(map->ioaddr, ATTACK_DECAY + map->op[3], instr->operators[OFFS_4OP + 5]);
 617
 618                 /*
 619                  * Set Sustain/Release
 620                  */
 621
 622                 opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[2], instr->operators[OFFS_4OP + 6]);
 623                 opl3_command(map->ioaddr, SUSTAIN_RELEASE + map->op[3], instr->operators[OFFS_4OP + 7]);
 624
 625                 /*
 626                  * Set Wave Select
 627                  */
 628
 629                 opl3_command(map->ioaddr, WAVE_SELECT + map->op[2], instr->operators[OFFS_4OP + 8]);
 630                 opl3_command(map->ioaddr, WAVE_SELECT + map->op[3], instr->operators[OFFS_4OP + 9]);
 631
 632                 /*
 633                  * Set Feedback/Connection
 634                  */
 635
 636                 fpc = instr->operators[OFFS_4OP + 10];
 637                 if (!(fpc & 0x30))
 638                          fpc |= 0x30;   /*
 639                                          * Ensure that at least one chn is enabled
 640                                          */
 641                 opl3_command(map->ioaddr, FEEDBACK_CONNECTION + map->voice_num + 3, fpc);
 642         }
 643
 644         devc->voc[voice].mode = voice_mode;
 645         set_voice_volume(voice, volume, devc->voc[voice].volume);
 646
 647         freq = devc->voc[voice].orig_freq = note_to_freq(note) / 1000;
 648
 649         /*
 650          * Since the pitch bender may have been set before playing the note, we
 651          * have to calculate the bending now.
 652          */
 653
 654         freq = compute_finetune(devc->voc[voice].orig_freq, devc->voc[voice].bender, devc->voc[voice].bender_range, 0);
 655         devc->voc[voice].current_freq = freq;
 656
 657         freq_to_fnum(freq, &block, &fnum);
 658
 659         /*
 660          * Play note
 661          */
 662
 663         data = fnum & 0xff;     /*
 664                                  * Least significant bits of fnumber
 665                                  */
 666         opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
 667
 668         data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
 669                  devc->voc[voice].keyon_byte = data;
 670         opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
 671         if (voice_mode == 4)
 672                 opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num + 3, data);
 673
 674         return 0;
 675 }
 676
 677 static void freq_to_fnum    (int freq, int *block, int *fnum)
 678 {
 679         int f, octave;
 680
 681         /*
 682          * Converts the note frequency to block and fnum values for the FM chip
 683          */
 684         /*
 685          * First try to compute the block -value (octave) where the note belongs
 686          */
 687
 688         f = freq;
 689
 690         octave = 5;
 691
 692         if (f == 0)
 693                 octave = 0;
 694         else if (f < 261)
 695         {
 696                 while (f < 261)
 697                 {
 698                         octave--;
 699                         f <<= 1;
 700                 }
 701         }
 702         else if (f > 493)
 703         {
 704                 while (f > 493)
 705                 {
 706                          octave++;
 707                          f >>= 1;
 708                 }
 709         }
 710
 711         if (octave > 7)
 712                 octave = 7;
 713
 714         *fnum = freq * (1 << (20 - octave)) / 49716;
 715         *block = octave;
 716 }
 717
 718 static void opl3_command    (int io_addr, unsigned int addr, unsigned int val)
 719 {
 720          int i;
 721
 722         /*
 723          * The original 2-OP synth requires a quite long delay after writing to a
 724          * register. The OPL-3 survives with just two INBs
 725          */
 726
 727         outb(((unsigned char) (addr & 0xff)), io_addr);
 728
 729         if (devc->model != 2)
 730                 udelay(10);
 731         else
 732                 for (i = 0; i < 2; i++)
 733                         inb(io_addr);
 734
 735         outb(((unsigned char) (val & 0xff)), io_addr + 1);
 736
 737         if (devc->model != 2)
 738                 udelay(30);
 739         else
 740                 for (i = 0; i < 2; i++)
 741                         inb(io_addr);
 742 }
 743
 744 static void opl3_reset(int devno)
 745 {
 746         int i;
 747
 748         for (i = 0; i < 18; i++)
 749                 devc->lv_map[i] = i;
 750
 751         for (i = 0; i < devc->nr_voice; i++)
 752         {
 753                 opl3_command(pv_map[devc->lv_map[i]].ioaddr,
 754                         KSL_LEVEL + pv_map[devc->lv_map[i]].op[0], 0xff);
 755
 756                 opl3_command(pv_map[devc->lv_map[i]].ioaddr,
 757                         KSL_LEVEL + pv_map[devc->lv_map[i]].op[1], 0xff);
 758
 759                 if (pv_map[devc->lv_map[i]].voice_mode == 4)
 760                 {
 761                         opl3_command(pv_map[devc->lv_map[i]].ioaddr,
 762                                 KSL_LEVEL + pv_map[devc->lv_map[i]].op[2], 0xff);
 763
 764                         opl3_command(pv_map[devc->lv_map[i]].ioaddr,
 765                                 KSL_LEVEL + pv_map[devc->lv_map[i]].op[3], 0xff);
 766                 }
 767
 768                 opl3_kill_note(devno, i, 0, 64);
 769         }
 770
 771         if (devc->model == 2)
 772         {
 773                 devc->v_alloc->max_voice = devc->nr_voice = 18;
 774
 775                 for (i = 0; i < 18; i++)
 776                         pv_map[i].voice_mode = 2;
 777
 778         }
 779 }
 780
 781 static int opl3_open(int dev, int mode)
 782 {
 783         int i;
 784
 785         if (devc->busy)
 786                 return -EBUSY;
 787         devc->busy = 1;
 788
 789         devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
 790         devc->v_alloc->timestamp = 0;
 791
 792         for (i = 0; i < 18; i++)
 793         {
 794                 devc->v_alloc->map[i] = 0;
 795                 devc->v_alloc->alloc_times[i] = 0;
 796         }
 797
 798         devc->cmask = 0x00;     /*
 799                                  * Just 2 OP mode
 800                                  */
 801         if (devc->model == 2)
 802                 opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, devc->cmask);
 803         return 0;
 804 }
 805
 806 static void opl3_close(int dev)
 807 {
 808         devc->busy = 0;
 809         devc->v_alloc->max_voice = devc->nr_voice = (devc->model == 2) ? 18 : 9;
 810
 811         devc->fm_info.nr_drums = 0;
 812         devc->fm_info.perc_mode = 0;
 813
 814         opl3_reset(dev);
 815 }
 816
 817 static void opl3_hw_control(int dev, unsigned char *event)
 818 {
 819 }
 820
 821 static int opl3_load_patch(int dev, int format, const char __user *addr,
 822                 int offs, int count, int pmgr_flag)
 823 {
 824         struct sbi_instrument ins;
 825
 826         if (count <sizeof(ins))
 827         {
 828                 printk(KERN_WARNING "FM Error: Patch record too short\n");
 829                 return -EINVAL;
 830         }
 831
 832         /*
 833          * What the fuck is going on here?  We leave junk in the beginning
 834          * of ins and then check the field pretty close to that beginning?
 835          */
 836         if(copy_from_user(&((char *) &ins)[offs], addr + offs, sizeof(ins) - offs))
 837                 return -EFAULT;
 838
 839         if (ins.channel < 0 || ins.channel >= SBFM_MAXINSTR)
 840         {
 841                 printk(KERN_WARNING "FM Error: Invalid instrument number %d\n", ins.channel);
 842                 return -EINVAL;
 843         }
 844         ins.key = format;
 845
 846         return store_instr(ins.channel, &ins);
 847 }
 848
 849 static void opl3_panning(int dev, int voice, int value)
 850 {
 851         devc->voc[voice].panning = value;
 852 }
 853
 854 static void opl3_volume_method(int dev, int mode)
 855 {
 856 }
 857
 858 #define SET_VIBRATO(cell) { \
 859         tmp = instr->operators[(cell-1)+(((cell-1)/2)*OFFS_4OP)]; \
 860         if (pressure > 110) \
 861                 tmp |= 0x40;            /* Vibrato on */ \
 862         opl3_command (map->ioaddr, AM_VIB + map->op[cell-1], tmp);}
 863
 864 static void opl3_aftertouch(int dev, int voice, int pressure)
 865 {
 866         int tmp;
 867         struct sbi_instrument *instr;
 868         struct physical_voice_info *map;
 869
 870         if (voice < 0 || voice >= devc->nr_voice)
 871                 return;
 872
 873         map = &pv_map[devc->lv_map[voice]];
 874
 875         DEB(printk("Aftertouch %d\n", voice));
 876
 877         if (map->voice_mode == 0)
 878                 return;
 879
 880         /*
 881          * Adjust the amount of vibrato depending the pressure
 882          */
 883
 884         instr = devc->act_i[voice];
 885
 886         if (!instr)
 887                 instr = &devc->i_map[0];
 888
 889         if (devc->voc[voice].mode == 4)
 890         {
 891                 int connection = ((instr->operators[10] & 0x01) << 1) | (instr->operators[10 + OFFS_4OP] & 0x01);
 892
 893                 switch (connection)
 894                 {
 895                         case 0:
 896                                 SET_VIBRATO(4);
 897                                 break;
 898
 899                         case 1:
 900                                 SET_VIBRATO(2);
 901                                 SET_VIBRATO(4);
 902                                 break;
 903
 904                         case 2:
 905                                 SET_VIBRATO(1);
 906                                 SET_VIBRATO(4);
 907                                 break;
 908
 909                         case 3:
 910                                 SET_VIBRATO(1);
 911                                 SET_VIBRATO(3);
 912                                 SET_VIBRATO(4);
 913                                 break;
 914
 915                 }
 916                 /*
 917                  * Not implemented yet
 918                  */
 919         }
 920         else
 921         {
 922                 SET_VIBRATO(1);
 923
 924                 if ((instr->operators[10] & 0x01))      /*
 925                                                          * Additive synthesis
 926                                                          */
 927                         SET_VIBRATO(2);
 928         }
 929 }
 930
 931 #undef SET_VIBRATO
 932
 933 static void bend_pitch(int dev, int voice, int value)
 934 {
 935         unsigned char data;
 936         int block, fnum, freq;
 937         struct physical_voice_info *map;
 938
 939         map = &pv_map[devc->lv_map[voice]];
 940
 941         if (map->voice_mode == 0)
 942                 return;
 943
 944         devc->voc[voice].bender = value;
 945         if (!value)
 946                 return;
 947         if (!(devc->voc[voice].keyon_byte & 0x20))
 948                 return; /*
 949                          * Not keyed on
 950                          */
 951
 952         freq = compute_finetune(devc->voc[voice].orig_freq, devc->voc[voice].bender, devc->voc[voice].bender_range, 0);
 953         devc->voc[voice].current_freq = freq;
 954
 955         freq_to_fnum(freq, &block, &fnum);
 956
 957         data = fnum & 0xff;     /*
 958                                  * Least significant bits of fnumber
 959                                  */
 960         opl3_command(map->ioaddr, FNUM_LOW + map->voice_num, data);
 961
 962         data = 0x20 | ((block & 0x7) << 2) | ((fnum >> 8) & 0x3);
 963         devc->voc[voice].keyon_byte = data;
 964         opl3_command(map->ioaddr, KEYON_BLOCK + map->voice_num, data);
 965 }
 966
 967 static void opl3_controller (int dev, int voice, int ctrl_num, int value)
 968 {
 969         if (voice < 0 || voice >= devc->nr_voice)
 970                 return;
 971
 972         switch (ctrl_num)
 973         {
 974                 case CTRL_PITCH_BENDER:
 975                         bend_pitch(dev, voice, value);
 976                         break;
 977
 978                 case CTRL_PITCH_BENDER_RANGE:
 979                         devc->voc[voice].bender_range = value;
 980                         break;
 981
 982                 case CTL_MAIN_VOLUME:
 983                         devc->voc[voice].volume = value / 128;
 984                         break;
 985
 986                 case CTL_PAN:
 987                         devc->voc[voice].panning = (value * 2) - 128;
 988                         break;
 989         }
 990 }
 991
 992 static void opl3_bender(int dev, int voice, int value)
 993 {
 994         if (voice < 0 || voice >= devc->nr_voice)
 995                 return;
 996
 997         bend_pitch(dev, voice, value - 8192);
 998 }
 999
1000 static int opl3_alloc_voice(int dev, int chn, int note, struct voice_alloc_info *alloc)
1001 {
1002         int i, p, best, first, avail, best_time = 0x7fffffff;
1003         struct sbi_instrument *instr;
1004         int is4op;
1005         int instr_no;
1006
1007         if (chn < 0 || chn > 15)
1008                 instr_no = 0;
1009         else
1010                 instr_no = devc->chn_info[chn].pgm_num;
1011
1012         instr = &devc->i_map[instr_no];
1013         if (instr->channel < 0 ||       /* Instrument not loaded */
1014                 devc->nr_voice != 12)   /* Not in 4 OP mode */
1015                 is4op = 0;
1016         else if (devc->nr_voice == 12)  /* 4 OP mode */
1017                 is4op = (instr->key == OPL3_PATCH);
1018         else
1019                 is4op = 0;
1020
1021         if (is4op)
1022         {
1023                 first = p = 0;
1024                 avail = 6;
1025         }
1026         else
1027         {
1028                 if (devc->nr_voice == 12)       /* 4 OP mode. Use the '2 OP only' operators first */
1029                         first = p = 6;
1030                 else
1031                         first = p = 0;
1032                 avail = devc->nr_voice;
1033         }
1034
1035         /*
1036          *    Now try to find a free voice
1037          */
1038         best = first;
1039
1040         for (i = 0; i < avail; i++)
1041         {
1042                 if (alloc->map[p] == 0)
1043                 {
1044                         return p;
1045                 }
1046                 if (alloc->alloc_times[p] < best_time)          /* Find oldest playing note */
1047                 {
1048                         best_time = alloc->alloc_times[p];
1049                         best = p;
1050                 }
1051                 p = (p + 1) % avail;
1052         }
1053
1054         /*
1055          *    Insert some kind of priority mechanism here.
1056          */
1057
1058         if (best < 0)
1059                 best = 0;
1060         if (best > devc->nr_voice)
1061                 best -= devc->nr_voice;
1062
1063         return best;    /* All devc->voc in use. Select the first one. */
1064 }
1065
1066 static void opl3_setup_voice(int dev, int voice, int chn)
1067 {
1068         struct channel_info *info =
1069         &synth_devs[dev]->chn_info[chn];
1070
1071         opl3_set_instr(dev, voice, info->pgm_num);
1072
1073         devc->voc[voice].bender = 0;
1074         devc->voc[voice].bender_range = info->bender_range;
1075         devc->voc[voice].volume = info->controllers[CTL_MAIN_VOLUME];
1076         devc->voc[voice].panning = (info->controllers[CTL_PAN] * 2) - 128;
1077 }
1078
1079 static struct synth_operations opl3_operations =
1080 {
1081         .owner          = THIS_MODULE,
1082         .id             = "OPL",
1083         .info           = NULL,
1084         .midi_dev       = 0,
1085         .synth_type     = SYNTH_TYPE_FM,
1086         .synth_subtype  = FM_TYPE_ADLIB,
1087         .open           = opl3_open,
1088         .close          = opl3_close,
1089         .ioctl          = opl3_ioctl,
1090         .kill_note      = opl3_kill_note,
1091         .start_note     = opl3_start_note,
1092         .set_instr      = opl3_set_instr,
1093         .reset          = opl3_reset,
1094         .hw_control     = opl3_hw_control,
1095         .load_patch     = opl3_load_patch,
1096         .aftertouch     = opl3_aftertouch,
1097         .controller     = opl3_controller,
1098         .panning        = opl3_panning,
1099         .volume_method  = opl3_volume_method,
1100         .bender         = opl3_bender,
1101         .alloc_voice    = opl3_alloc_voice,
1102         .setup_voice    = opl3_setup_voice
1103 };
1104
1105 static int opl3_init(int ioaddr, struct module *owner)
1106 {
1107         int i;
1108         int me;
1109
1110         if (devc == NULL)
1111         {
1112                 printk(KERN_ERR "opl3: Device control structure not initialized.\n");
1113                 return -1;
1114         }
1115
1116         if ((me = sound_alloc_synthdev()) == -1)
1117         {
1118                 printk(KERN_WARNING "opl3: Too many synthesizers\n");
1119                 return -1;
1120         }
1121
1122         devc->nr_voice = 9;
1123
1124         devc->fm_info.device = 0;
1125         devc->fm_info.synth_type = SYNTH_TYPE_FM;
1126         devc->fm_info.synth_subtype = FM_TYPE_ADLIB;
1127         devc->fm_info.perc_mode = 0;
1128         devc->fm_info.nr_voices = 9;
1129         devc->fm_info.nr_drums = 0;
1130         devc->fm_info.instr_bank_size = SBFM_MAXINSTR;
1131         devc->fm_info.capabilities = 0;
1132         devc->left_io = ioaddr;
1133         devc->right_io = ioaddr + 2;
1134
1135         if (detected_model <= 2)
1136                 devc->model = 1;
1137         else
1138         {
1139                 devc->model = 2;
1140                 if (detected_model == 4)
1141                         devc->is_opl4 = 1;
1142         }
1143
1144         opl3_operations.info = &devc->fm_info;
1145
1146         synth_devs[me] = &opl3_operations;
1147
1148         if (owner)
1149                 synth_devs[me]->owner = owner;
1150
1151         sequencer_init();
1152         devc->v_alloc = &opl3_operations.alloc;
1153         devc->chn_info = &opl3_operations.chn_info[0];
1154
1155         if (devc->model == 2)
1156         {
1157                 if (devc->is_opl4)
1158                         strcpy(devc->fm_info.name, "Yamaha OPL4/OPL3 FM");
1159                 else
1160                         strcpy(devc->fm_info.name, "Yamaha OPL3");
1161
1162                 devc->v_alloc->max_voice = devc->nr_voice = 18;
1163                 devc->fm_info.nr_drums = 0;
1164                 devc->fm_info.synth_subtype = FM_TYPE_OPL3;
1165                 devc->fm_info.capabilities |= SYNTH_CAP_OPL3;
1166
1167                 for (i = 0; i < 18; i++)
1168                 {
1169                         if (pv_map[i].ioaddr == USE_LEFT)
1170                                 pv_map[i].ioaddr = devc->left_io;
1171                         else
1172                                 pv_map[i].ioaddr = devc->right_io;
1173                 }
1174                 opl3_command(devc->right_io, OPL3_MODE_REGISTER, OPL3_ENABLE);
1175                 opl3_command(devc->right_io, CONNECTION_SELECT_REGISTER, 0x00);
1176         }
1177         else
1178         {
1179                 strcpy(devc->fm_info.name, "Yamaha OPL2");
1180                 devc->v_alloc->max_voice = devc->nr_voice = 9;
1181                 devc->fm_info.nr_drums = 0;
1182
1183                 for (i = 0; i < 18; i++)
1184                         pv_map[i].ioaddr = devc->left_io;
1185         };
1186         conf_printf2(devc->fm_info.name, ioaddr, 0, -1, -1);
1187
1188         for (i = 0; i < SBFM_MAXINSTR; i++)
1189                 devc->i_map[i].channel = -1;
1190
1191         return me;
1192 }
1193
1194 static int me;
1195
1196 static int io = -1;
1197
1198 module_param(io, int, 0);
1199
1200 static int __init init_opl3 (void)
1201 {
1202         printk(KERN_INFO "YM3812 and OPL-3 driver Copyright (C) by Hannu Savolainen, Rob Hooft 1993-1996\n");
1203
1204         if (io != -1)   /* User loading pure OPL3 module */
1205         {
1206                 if (!opl3_detect(io))
1207                 {
1208                         return -ENODEV;
1209                 }
1210
1211                 me = opl3_init(io, THIS_MODULE);
1212         }
1213
1214         return 0;
1215 }
1216
1217 static void __exit cleanup_opl3(void)
1218 {
1219         if (devc && io != -1)
1220         {
1221                 if (devc->base) {
1222                         release_region(devc->base,4);
1223                         if (devc->is_opl4)
1224                                 release_region(devc->base - 8, 2);
1225                 }
1226                 kfree(devc);
1227                 devc = NULL;
1228                 sound_unload_synthdev(me);
1229         }
1230 }
1231
1232 module_init(init_opl3);
1233 module_exit(cleanup_opl3);
1234
1235 #ifndef MODULE
1236 static int __init setup_opl3(char *str)
1237 {
1238         /* io  */
1239         int ints[2];
1240
1241         str = get_options(str, ARRAY_SIZE(ints), ints);
1242
1243         io = ints[1];
1244
1245         return 1;
1246 }
1247
1248 __setup("opl3=", setup_opl3);
1249 #endif
1250 MODULE_LICENSE("GPL");