libpcsxcore/cdrom.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007 Ryan Schultz, PCSX-df Team, PCSX team              *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  18  ***************************************************************************/
  19
  20 /*
  21 * Handles all CD-ROM registers and functions.
  22 */
  23
  24 #include "cdrom.h"
  25 #include "ppf.h"
  26 #include "psxdma.h"
  27 #include "arm_features.h"
  28
  29 /* logging */
  30 #if 0
  31 #define CDR_LOG SysPrintf
  32 #else
  33 #define CDR_LOG(...)
  34 #endif
  35 #if 0
  36 #define CDR_LOG_I SysPrintf
  37 #else
  38 #define CDR_LOG_I(...)
  39 #endif
  40 #if 0
  41 #define CDR_LOG_IO SysPrintf
  42 #else
  43 #define CDR_LOG_IO(...)
  44 #endif
  45 //#define CDR_LOG_CMD_IRQ
  46
  47 cdrStruct cdr;
  48 static unsigned char *pTransfer;
  49 static s16 read_buf[CD_FRAMESIZE_RAW/2];
  50
  51 /* CD-ROM magic numbers */
  52 #define CdlSync        0  /* nocash documentation : "Uh, actually, returns error code 40h = Invalid Command...?" */
  53 #define CdlNop         1
  54 #define CdlSetloc      2
  55 #define CdlPlay        3
  56 #define CdlForward     4
  57 #define CdlBackward    5
  58 #define CdlReadN       6
  59 #define CdlStandby     7
  60 #define CdlStop        8
  61 #define CdlPause       9
  62 #define CdlReset       10
  63 #define CdlMute        11
  64 #define CdlDemute      12
  65 #define CdlSetfilter   13
  66 #define CdlSetmode     14
  67 #define CdlGetparam    15
  68 #define CdlGetlocL     16
  69 #define CdlGetlocP     17
  70 #define CdlReadT       18
  71 #define CdlGetTN       19
  72 #define CdlGetTD       20
  73 #define CdlSeekL       21
  74 #define CdlSeekP       22
  75 #define CdlSetclock    23
  76 #define CdlGetclock    24
  77 #define CdlTest        25
  78 #define CdlID          26
  79 #define CdlReadS       27
  80 #define CdlInit        28
  81 #define CdlGetQ        29
  82 #define CdlReadToc     30
  83
  84 char *CmdName[0x100]= {
  85     "CdlSync",     "CdlNop",       "CdlSetloc",  "CdlPlay",
  86     "CdlForward",  "CdlBackward",  "CdlReadN",   "CdlStandby",
  87     "CdlStop",     "CdlPause",     "CdlReset",    "CdlMute",
  88     "CdlDemute",   "CdlSetfilter", "CdlSetmode", "CdlGetparam",
  89     "CdlGetlocL",  "CdlGetlocP",   "CdlReadT",   "CdlGetTN",
  90     "CdlGetTD",    "CdlSeekL",     "CdlSeekP",   "CdlSetclock",
  91     "CdlGetclock", "CdlTest",      "CdlID",      "CdlReadS",
  92     "CdlInit",     NULL,           "CDlReadToc", NULL
  93 };
  94
  95 unsigned char Test04[] = { 0 };
  96 unsigned char Test05[] = { 0 };
  97 unsigned char Test20[] = { 0x98, 0x06, 0x10, 0xC3 };
  98 unsigned char Test22[] = { 0x66, 0x6F, 0x72, 0x20, 0x45, 0x75, 0x72, 0x6F };
  99 unsigned char Test23[] = { 0x43, 0x58, 0x44, 0x32, 0x39 ,0x34, 0x30, 0x51 };
 100
 101 // cdr.Stat:
 102 #define NoIntr          0
 103 #define DataReady       1
 104 #define Complete        2
 105 #define Acknowledge     3
 106 #define DataEnd         4
 107 #define DiskError       5
 108
 109 /* Modes flags */
 110 #define MODE_SPEED       (1<<7) // 0x80
 111 #define MODE_STRSND      (1<<6) // 0x40 ADPCM on/off
 112 #define MODE_SIZE_2340   (1<<5) // 0x20
 113 #define MODE_SIZE_2328   (1<<4) // 0x10
 114 #define MODE_SIZE_2048   (0<<4) // 0x00
 115 #define MODE_SF          (1<<3) // 0x08 channel on/off
 116 #define MODE_REPORT      (1<<2) // 0x04
 117 #define MODE_AUTOPAUSE   (1<<1) // 0x02
 118 #define MODE_CDDA        (1<<0) // 0x01
 119
 120 /* Status flags */
 121 #define STATUS_PLAY      (1<<7) // 0x80
 122 #define STATUS_SEEK      (1<<6) // 0x40
 123 #define STATUS_READ      (1<<5) // 0x20
 124 #define STATUS_SHELLOPEN (1<<4) // 0x10
 125 #define STATUS_UNKNOWN3  (1<<3) // 0x08
 126 #define STATUS_UNKNOWN2  (1<<2) // 0x04
 127 #define STATUS_ROTATING  (1<<1) // 0x02
 128 #define STATUS_ERROR     (1<<0) // 0x01
 129
 130 /* Errors */
 131 #define ERROR_NOTREADY   (1<<7) // 0x80
 132 #define ERROR_INVALIDCMD (1<<6) // 0x40
 133 #define ERROR_INVALIDARG (1<<5) // 0x20
 134
 135 // 1x = 75 sectors per second
 136 // PSXCLK = 1 sec in the ps
 137 // so (PSXCLK / 75) = cdr read time (linuzappz)
 138 #define cdReadTime (PSXCLK / 75)
 139
 140 enum drive_state {
 141         DRIVESTATE_STANDBY = 0,
 142         DRIVESTATE_LID_OPEN,
 143         DRIVESTATE_RESCAN_CD,
 144         DRIVESTATE_PREPARE_CD,
 145         DRIVESTATE_STOPPED,
 146 };
 147
 148 // for cdr.Seeked
 149 enum seeked_state {
 150         SEEK_PENDING = 0,
 151         SEEK_DONE = 1,
 152 };
 153
 154 static struct CdrStat stat;
 155
 156 static unsigned int msf2sec(const u8 *msf) {
 157         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 158 }
 159
 160 // for that weird psemu API..
 161 static unsigned int fsm2sec(const u8 *msf) {
 162         return ((msf[2] * 60 + msf[1]) * 75) + msf[0];
 163 }
 164
 165 static void sec2msf(unsigned int s, u8 *msf) {
 166         msf[0] = s / 75 / 60;
 167         s = s - msf[0] * 75 * 60;
 168         msf[1] = s / 75;
 169         s = s - msf[1] * 75;
 170         msf[2] = s;
 171 }
 172
 173 // cdrInterrupt
 174 #define CDR_INT(eCycle) { \
 175         psxRegs.interrupt |= (1 << PSXINT_CDR); \
 176         psxRegs.intCycle[PSXINT_CDR].cycle = eCycle; \
 177         psxRegs.intCycle[PSXINT_CDR].sCycle = psxRegs.cycle; \
 178         new_dyna_set_event(PSXINT_CDR, eCycle); \
 179 }
 180
 181 // cdrReadInterrupt
 182 #define CDREAD_INT(eCycle) { \
 183         psxRegs.interrupt |= (1 << PSXINT_CDREAD); \
 184         psxRegs.intCycle[PSXINT_CDREAD].cycle = eCycle; \
 185         psxRegs.intCycle[PSXINT_CDREAD].sCycle = psxRegs.cycle; \
 186         new_dyna_set_event(PSXINT_CDREAD, eCycle); \
 187 }
 188
 189 // cdrLidSeekInterrupt
 190 #define CDRLID_INT(eCycle) { \
 191         psxRegs.interrupt |= (1 << PSXINT_CDRLID); \
 192         psxRegs.intCycle[PSXINT_CDRLID].cycle = eCycle; \
 193         psxRegs.intCycle[PSXINT_CDRLID].sCycle = psxRegs.cycle; \
 194         new_dyna_set_event(PSXINT_CDRLID, eCycle); \
 195 }
 196
 197 // cdrPlayInterrupt
 198 #define CDRMISC_INT(eCycle) { \
 199         psxRegs.interrupt |= (1 << PSXINT_CDRPLAY); \
 200         psxRegs.intCycle[PSXINT_CDRPLAY].cycle = eCycle; \
 201         psxRegs.intCycle[PSXINT_CDRPLAY].sCycle = psxRegs.cycle; \
 202         new_dyna_set_event(PSXINT_CDRPLAY, eCycle); \
 203 }
 204
 205 #define StopReading() { \
 206         if (cdr.Reading) { \
 207                 cdr.Reading = 0; \
 208                 psxRegs.interrupt &= ~(1 << PSXINT_CDREAD); \
 209         } \
 210         cdr.StatP &= ~(STATUS_READ|STATUS_SEEK);\
 211 }
 212
 213 #define StopCdda() { \
 214         if (cdr.Play) { \
 215                 if (!Config.Cdda) CDR_stop(); \
 216                 cdr.StatP &= ~STATUS_PLAY; \
 217                 cdr.Play = FALSE; \
 218                 cdr.FastForward = 0; \
 219                 cdr.FastBackward = 0; \
 220                 /*SPU_registerCallback( SPUirq );*/ \
 221         } \
 222 }
 223
 224 #define SetResultSize(size) { \
 225         cdr.ResultP = 0; \
 226         cdr.ResultC = size; \
 227         cdr.ResultReady = 1; \
 228 }
 229
 230 static void setIrq(void)
 231 {
 232         if (cdr.Stat & cdr.Reg2)
 233                 psxHu32ref(0x1070) |= SWAP32((u32)0x4);
 234 }
 235
 236 // timing used in this function was taken from tests on real hardware
 237 // (yes it's slow, but you probably don't want to modify it)
 238 void cdrLidSeekInterrupt()
 239 {
 240         switch (cdr.DriveState) {
 241         default:
 242         case DRIVESTATE_STANDBY:
 243                 cdr.StatP &= ~STATUS_SEEK;
 244
 245                 if (CDR_getStatus(&stat) == -1)
 246                         return;
 247
 248                 if (stat.Status & STATUS_SHELLOPEN)
 249                 {
 250                         StopCdda();
 251                         cdr.DriveState = DRIVESTATE_LID_OPEN;
 252                         CDRLID_INT(0x800);
 253                 }
 254                 break;
 255
 256         case DRIVESTATE_LID_OPEN:
 257                 if (CDR_getStatus(&stat) == -1)
 258                         stat.Status &= ~STATUS_SHELLOPEN;
 259
 260                 // 02, 12, 10
 261                 if (!(cdr.StatP & STATUS_SHELLOPEN)) {
 262                         StopReading();
 263                         cdr.StatP |= STATUS_SHELLOPEN;
 264
 265                         // could generate error irq here, but real hardware
 266                         // only sometimes does that
 267                         // (not done when lots of commands are sent?)
 268
 269                         CDRLID_INT(cdReadTime * 30);
 270                         break;
 271                 }
 272                 else if (cdr.StatP & STATUS_ROTATING) {
 273                         cdr.StatP &= ~STATUS_ROTATING;
 274                 }
 275                 else if (!(stat.Status & STATUS_SHELLOPEN)) {
 276                         // closed now
 277                         CheckCdrom();
 278
 279                         // cdr.StatP STATUS_SHELLOPEN is "sticky"
 280                         // and is only cleared by CdlNop
 281
 282                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
 283                         CDRLID_INT(cdReadTime * 105);
 284                         break;
 285                 }
 286
 287                 // recheck for close
 288                 CDRLID_INT(cdReadTime * 3);
 289                 break;
 290
 291         case DRIVESTATE_RESCAN_CD:
 292                 cdr.StatP |= STATUS_ROTATING;
 293                 cdr.DriveState = DRIVESTATE_PREPARE_CD;
 294
 295                 // this is very long on real hardware, over 6 seconds
 296                 // make it a bit faster here...
 297                 CDRLID_INT(cdReadTime * 150);
 298                 break;
 299
 300         case DRIVESTATE_PREPARE_CD:
 301                 cdr.StatP |= STATUS_SEEK;
 302
 303                 cdr.DriveState = DRIVESTATE_STANDBY;
 304                 CDRLID_INT(cdReadTime * 26);
 305                 break;
 306         }
 307 }
 308
 309 static void Find_CurTrack(const u8 *time)
 310 {
 311         int current, sect;
 312
 313         current = msf2sec(time);
 314
 315         for (cdr.CurTrack = 1; cdr.CurTrack < cdr.ResultTN[1]; cdr.CurTrack++) {
 316                 CDR_getTD(cdr.CurTrack + 1, cdr.ResultTD);
 317                 sect = fsm2sec(cdr.ResultTD);
 318                 if (sect - current >= 150)
 319                         break;
 320         }
 321 }
 322
 323 static void generate_subq(const u8 *time)
 324 {
 325         unsigned char start[3], next[3];
 326         unsigned int this_s, start_s, next_s, pregap;
 327         int relative_s;
 328
 329         CDR_getTD(cdr.CurTrack, start);
 330         if (cdr.CurTrack + 1 <= cdr.ResultTN[1]) {
 331                 pregap = 150;
 332                 CDR_getTD(cdr.CurTrack + 1, next);
 333         }
 334         else {
 335                 // last track - cd size
 336                 pregap = 0;
 337                 next[0] = cdr.SetSectorEnd[2];
 338                 next[1] = cdr.SetSectorEnd[1];
 339                 next[2] = cdr.SetSectorEnd[0];
 340         }
 341
 342         this_s = msf2sec(time);
 343         start_s = fsm2sec(start);
 344         next_s = fsm2sec(next);
 345
 346         cdr.TrackChanged = FALSE;
 347
 348         if (next_s - this_s < pregap) {
 349                 cdr.TrackChanged = TRUE;
 350                 cdr.CurTrack++;
 351                 start_s = next_s;
 352         }
 353
 354         cdr.subq.Index = 1;
 355
 356         relative_s = this_s - start_s;
 357         if (relative_s < 0) {
 358                 cdr.subq.Index = 0;
 359                 relative_s = -relative_s;
 360         }
 361         sec2msf(relative_s, cdr.subq.Relative);
 362
 363         cdr.subq.Track = itob(cdr.CurTrack);
 364         cdr.subq.Relative[0] = itob(cdr.subq.Relative[0]);
 365         cdr.subq.Relative[1] = itob(cdr.subq.Relative[1]);
 366         cdr.subq.Relative[2] = itob(cdr.subq.Relative[2]);
 367         cdr.subq.Absolute[0] = itob(time[0]);
 368         cdr.subq.Absolute[1] = itob(time[1]);
 369         cdr.subq.Absolute[2] = itob(time[2]);
 370 }
 371
 372 static void ReadTrack(const u8 *time) {
 373         unsigned char tmp[3];
 374         struct SubQ *subq;
 375         u16 crc;
 376
 377         tmp[0] = itob(time[0]);
 378         tmp[1] = itob(time[1]);
 379         tmp[2] = itob(time[2]);
 380
 381         if (memcmp(cdr.Prev, tmp, 3) == 0)
 382                 return;
 383
 384         CDR_LOG("ReadTrack *** %02x:%02x:%02x\n", tmp[0], tmp[1], tmp[2]);
 385
 386         cdr.NoErr = CDR_readTrack(tmp);
 387         memcpy(cdr.Prev, tmp, 3);
 388
 389         if (CheckSBI(time))
 390                 return;
 391
 392         subq = (struct SubQ *)CDR_getBufferSub();
 393         if (subq != NULL && cdr.CurTrack == 1) {
 394                 crc = calcCrc((u8 *)subq + 12, 10);
 395                 if (crc == (((u16)subq->CRC[0] << 8) | subq->CRC[1])) {
 396                         cdr.subq.Track = subq->TrackNumber;
 397                         cdr.subq.Index = subq->IndexNumber;
 398                         memcpy(cdr.subq.Relative, subq->TrackRelativeAddress, 3);
 399                         memcpy(cdr.subq.Absolute, subq->AbsoluteAddress, 3);
 400                 }
 401                 else {
 402                         CDR_LOG_I("subq bad crc @%02x:%02x:%02x\n",
 403                                 tmp[0], tmp[1], tmp[2]);
 404                 }
 405         }
 406         else {
 407                 generate_subq(time);
 408         }
 409
 410         CDR_LOG(" -> %02x,%02x %02x:%02x:%02x %02x:%02x:%02x\n",
 411                 cdr.subq.Track, cdr.subq.Index,
 412                 cdr.subq.Relative[0], cdr.subq.Relative[1], cdr.subq.Relative[2],
 413                 cdr.subq.Absolute[0], cdr.subq.Absolute[1], cdr.subq.Absolute[2]);
 414 }
 415
 416 static void AddIrqQueue(unsigned short irq, unsigned long ecycle) {
 417         if (cdr.Irq != 0) {
 418                 if (irq == cdr.Irq || irq + 0x100 == cdr.Irq) {
 419                         cdr.IrqRepeated = 1;
 420                         CDR_INT(ecycle);
 421                         return;
 422                 }
 423
 424                 CDR_LOG_I("cdr: override cmd %02x -> %02x\n", cdr.Irq, irq);
 425         }
 426
 427         cdr.Irq = irq;
 428         cdr.eCycle = ecycle;
 429
 430         CDR_INT(ecycle);
 431 }
 432
 433 static void cdrPlayInterrupt_Autopause()
 434 {
 435         u32 abs_lev_max = 0;
 436         boolean abs_lev_chselect;
 437         u32 i;
 438
 439         if ((cdr.Mode & MODE_AUTOPAUSE) && cdr.TrackChanged) {
 440                 CDR_LOG( "CDDA STOP\n" );
 441
 442                 // Magic the Gathering
 443                 // - looping territory cdda
 444
 445                 // ...?
 446                 //cdr.ResultReady = 1;
 447                 //cdr.Stat = DataReady;
 448                 cdr.Stat = DataEnd;
 449                 setIrq();
 450
 451                 StopCdda();
 452         }
 453         else if (((cdr.Mode & MODE_REPORT) || cdr.FastForward || cdr.FastBackward)) {
 454                 CDR_readCDDA(cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2], (u8 *)read_buf);
 455                 cdr.Result[0] = cdr.StatP;
 456                 cdr.Result[1] = cdr.subq.Track;
 457                 cdr.Result[2] = cdr.subq.Index;
 458
 459                 abs_lev_chselect = cdr.subq.Absolute[1] & 0x01;
 460
 461                 /* 8 is a hack. For accuracy, it should be 588. */
 462                 for (i = 0; i < 8; i++)
 463                 {
 464                         abs_lev_max = MAX_VALUE(abs_lev_max, abs(read_buf[i * 2 + abs_lev_chselect]));
 465                 }
 466                 abs_lev_max = MIN_VALUE(abs_lev_max, 32767);
 467                 abs_lev_max |= abs_lev_chselect << 15;
 468
 469                 if (cdr.subq.Absolute[2] & 0x10) {
 470                         cdr.Result[3] = cdr.subq.Relative[0];
 471                         cdr.Result[4] = cdr.subq.Relative[1] | 0x80;
 472                         cdr.Result[5] = cdr.subq.Relative[2];
 473                 }
 474                 else {
 475                         cdr.Result[3] = cdr.subq.Absolute[0];
 476                         cdr.Result[4] = cdr.subq.Absolute[1];
 477                         cdr.Result[5] = cdr.subq.Absolute[2];
 478                 }
 479
 480                 cdr.Result[6] = abs_lev_max >> 0;
 481                 cdr.Result[7] = abs_lev_max >> 8;
 482
 483                 // Rayman: Logo freeze (resultready + dataready)
 484                 cdr.ResultReady = 1;
 485                 cdr.Stat = DataReady;
 486
 487                 SetResultSize(8);
 488                 setIrq();
 489         }
 490 }
 491
 492 // also handles seek
 493 void cdrPlayInterrupt()
 494 {
 495         if (cdr.Seeked == SEEK_PENDING) {
 496                 if (cdr.Stat) {
 497                         CDR_LOG_I("cdrom: seek stat hack\n");
 498                         CDRMISC_INT(0x1000);
 499                         return;
 500                 }
 501                 SetResultSize(1);
 502                 cdr.StatP |= STATUS_ROTATING;
 503                 cdr.StatP &= ~STATUS_SEEK;
 504                 cdr.Result[0] = cdr.StatP;
 505                 cdr.Seeked = SEEK_DONE;
 506                 if (cdr.Irq == 0) {
 507                         cdr.Stat = Complete;
 508                         setIrq();
 509                 }
 510
 511                 if (cdr.SetlocPending) {
 512                         memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 513                         cdr.SetlocPending = 0;
 514                         cdr.m_locationChanged = TRUE;
 515                 }
 516                 Find_CurTrack(cdr.SetSectorPlay);
 517                 ReadTrack(cdr.SetSectorPlay);
 518                 cdr.TrackChanged = FALSE;
 519         }
 520
 521         if (!cdr.Play) return;
 522
 523         CDR_LOG( "CDDA - %d:%d:%d\n",
 524                 cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2] );
 525
 526         if (memcmp(cdr.SetSectorPlay, cdr.SetSectorEnd, 3) == 0) {
 527                 StopCdda();
 528                 cdr.TrackChanged = TRUE;
 529         }
 530
 531         if (!cdr.Irq && !cdr.Stat && (cdr.Mode & (MODE_AUTOPAUSE|MODE_REPORT)))
 532                 cdrPlayInterrupt_Autopause();
 533
 534         if (!cdr.Play) return;
 535
 536         if (CDR_readCDDA && !cdr.Muted && cdr.Mode & MODE_REPORT) {
 537                 cdrAttenuate(read_buf, CD_FRAMESIZE_RAW / 4, 1);
 538                 if (SPU_playCDDAchannel)
 539                         SPU_playCDDAchannel(read_buf, CD_FRAMESIZE_RAW);
 540         }
 541
 542         cdr.SetSectorPlay[2]++;
 543         if (cdr.SetSectorPlay[2] == 75) {
 544                 cdr.SetSectorPlay[2] = 0;
 545                 cdr.SetSectorPlay[1]++;
 546                 if (cdr.SetSectorPlay[1] == 60) {
 547                         cdr.SetSectorPlay[1] = 0;
 548                         cdr.SetSectorPlay[0]++;
 549                 }
 550         }
 551
 552         if (cdr.m_locationChanged)
 553         {
 554                 CDRMISC_INT(cdReadTime * 30);
 555                 cdr.m_locationChanged = FALSE;
 556         }
 557         else
 558         {
 559                 CDRMISC_INT(cdReadTime);
 560         }
 561
 562         // update for CdlGetlocP/autopause
 563         generate_subq(cdr.SetSectorPlay);
 564 }
 565
 566 void cdrInterrupt() {
 567         u16 Irq = cdr.Irq;
 568         int no_busy_error = 0;
 569         int start_rotating = 0;
 570         int error = 0;
 571         int delay;
 572         unsigned int seekTime = 0;
 573         u8 set_loc[3];
 574         int i;
 575
 576         // Reschedule IRQ
 577         if (cdr.Stat) {
 578                 CDR_LOG_I("cdrom: stat hack: %02x %x\n", cdr.Irq, cdr.Stat);
 579                 CDR_INT(0x1000);
 580                 return;
 581         }
 582
 583         cdr.Ctrl &= ~0x80;
 584
 585         // default response
 586         SetResultSize(1);
 587         cdr.Result[0] = cdr.StatP;
 588         cdr.Stat = Acknowledge;
 589
 590         if (cdr.IrqRepeated) {
 591                 cdr.IrqRepeated = 0;
 592                 if (cdr.eCycle > psxRegs.cycle) {
 593                         CDR_INT(cdr.eCycle);
 594                         goto finish;
 595                 }
 596         }
 597
 598         cdr.Irq = 0;
 599
 600         switch (Irq) {
 601                 case CdlNop:
 602                         if (cdr.DriveState != DRIVESTATE_LID_OPEN)
 603                                 cdr.StatP &= ~STATUS_SHELLOPEN;
 604                         no_busy_error = 1;
 605                         break;
 606
 607                 case CdlSetloc:
 608                         CDR_LOG("CDROM setloc command (%02X, %02X, %02X)\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
 609
 610                         // MM must be BCD, SS must be BCD and <0x60, FF must be BCD and <0x75
 611                         if (((cdr.Param[0] & 0x0F) > 0x09) || (cdr.Param[0] > 0x99) || ((cdr.Param[1] & 0x0F) > 0x09) || (cdr.Param[1] >= 0x60) || ((cdr.Param[2] & 0x0F) > 0x09) || (cdr.Param[2] >= 0x75))
 612                         {
 613                                 CDR_LOG("Invalid/out of range seek to %02X:%02X:%02X\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
 614                                 error = ERROR_INVALIDARG;
 615                                 goto set_error;
 616                         }
 617                         else
 618                         {
 619                                 for (i = 0; i < 3; i++)
 620                                 {
 621                                         set_loc[i] = btoi(cdr.Param[i]);
 622                                 }
 623
 624                                 i = msf2sec(cdr.SetSectorPlay);
 625                                 i = abs(i - msf2sec(set_loc));
 626                                 if (i > 16)
 627                                         cdr.Seeked = SEEK_PENDING;
 628
 629                                 memcpy(cdr.SetSector, set_loc, 3);
 630                                 cdr.SetSector[3] = 0;
 631                                 cdr.SetlocPending = 1;
 632                         }
 633                         break;
 634
 635                 do_CdlPlay:
 636                 case CdlPlay:
 637                         StopCdda();
 638                         if (cdr.Seeked == SEEK_PENDING) {
 639                                 // XXX: wrong, should seek instead..
 640                                 cdr.Seeked = SEEK_DONE;
 641                         }
 642
 643                         cdr.FastBackward = 0;
 644                         cdr.FastForward = 0;
 645
 646                         if (cdr.SetlocPending) {
 647                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 648                                 cdr.SetlocPending = 0;
 649                                 cdr.m_locationChanged = TRUE;
 650                         }
 651
 652                         // BIOS CD Player
 653                         // - Pause player, hit Track 01/02/../xx (Setloc issued!!)
 654
 655                         if (cdr.ParamC == 0 || cdr.Param[0] == 0) {
 656                                 CDR_LOG("PLAY Resume @ %d:%d:%d\n",
 657                                         cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2]);
 658                         }
 659                         else
 660                         {
 661                                 int track = btoi( cdr.Param[0] );
 662
 663                                 if (track <= cdr.ResultTN[1])
 664                                         cdr.CurTrack = track;
 665
 666                                 CDR_LOG("PLAY track %d\n", cdr.CurTrack);
 667
 668                                 if (CDR_getTD((u8)cdr.CurTrack, cdr.ResultTD) != -1) {
 669                                         cdr.SetSectorPlay[0] = cdr.ResultTD[2];
 670                                         cdr.SetSectorPlay[1] = cdr.ResultTD[1];
 671                                         cdr.SetSectorPlay[2] = cdr.ResultTD[0];
 672                                 }
 673                         }
 674
 675                         /*
 676                         Rayman: detect track changes
 677                         - fixes logo freeze
 678
 679                         Twisted Metal 2: skip PREGAP + starting accurate SubQ
 680                         - plays tracks without retry play
 681
 682                         Wild 9: skip PREGAP + starting accurate SubQ
 683                         - plays tracks without retry play
 684                         */
 685                         Find_CurTrack(cdr.SetSectorPlay);
 686                         ReadTrack(cdr.SetSectorPlay);
 687                         cdr.TrackChanged = FALSE;
 688
 689                         if (!Config.Cdda)
 690                                 CDR_play(cdr.SetSectorPlay);
 691
 692                         // Vib Ribbon: gameplay checks flag
 693                         cdr.StatP &= ~STATUS_SEEK;
 694                         cdr.Result[0] = cdr.StatP;
 695
 696                         cdr.StatP |= STATUS_PLAY;
 697
 698                         // BIOS player - set flag again
 699                         cdr.Play = TRUE;
 700
 701                         CDRMISC_INT( cdReadTime );
 702                         start_rotating = 1;
 703                         break;
 704
 705                 case CdlForward:
 706                         // TODO: error 80 if stopped
 707                         cdr.Stat = Complete;
 708
 709                         // GameShark CD Player: Calls 2x + Play 2x
 710                         cdr.FastForward = 1;
 711                         cdr.FastBackward = 0;
 712                         break;
 713
 714                 case CdlBackward:
 715                         cdr.Stat = Complete;
 716
 717                         // GameShark CD Player: Calls 2x + Play 2x
 718                         cdr.FastBackward = 1;
 719                         cdr.FastForward = 0;
 720                         break;
 721
 722                 case CdlStandby:
 723                         if (cdr.DriveState != DRIVESTATE_STOPPED) {
 724                                 error = ERROR_INVALIDARG;
 725                                 goto set_error;
 726                         }
 727                         AddIrqQueue(CdlStandby + 0x100, cdReadTime * 125 / 2);
 728                         start_rotating = 1;
 729                         break;
 730
 731                 case CdlStandby + 0x100:
 732                         cdr.Stat = Complete;
 733                         break;
 734
 735                 case CdlStop:
 736                         if (cdr.Play) {
 737                                 // grab time for current track
 738                                 CDR_getTD((u8)(cdr.CurTrack), cdr.ResultTD);
 739
 740                                 cdr.SetSectorPlay[0] = cdr.ResultTD[2];
 741                                 cdr.SetSectorPlay[1] = cdr.ResultTD[1];
 742                                 cdr.SetSectorPlay[2] = cdr.ResultTD[0];
 743                         }
 744
 745                         StopCdda();
 746                         StopReading();
 747
 748                         delay = 0x800;
 749                         if (cdr.DriveState == DRIVESTATE_STANDBY)
 750                                 delay = cdReadTime * 30 / 2;
 751
 752                         cdr.DriveState = DRIVESTATE_STOPPED;
 753                         AddIrqQueue(CdlStop + 0x100, delay);
 754                         break;
 755
 756                 case CdlStop + 0x100:
 757                         cdr.StatP &= ~STATUS_ROTATING;
 758                         cdr.Result[0] = cdr.StatP;
 759                         cdr.Stat = Complete;
 760                         break;
 761
 762                 case CdlPause:
 763                         /*
 764                         Gundam Battle Assault 2: much slower (*)
 765                         - Fixes boot, gameplay
 766
 767                         Hokuto no Ken 2: slower
 768                         - Fixes intro + subtitles
 769
 770                         InuYasha - Feudal Fairy Tale: slower
 771                         - Fixes battles
 772                         */
 773                         /* Gameblabla - Tightening the timings (as taken from Duckstation).
 774                          * The timings from Duckstation are based upon hardware tests.
 775                          * Mednafen's timing don't work for Gundam Battle Assault 2 in PAL/50hz mode,
 776                          * seems to be timing sensitive as it can depend on the CPU's clock speed.
 777                          * */
 778                         if (cdr.DriveState != DRIVESTATE_STANDBY)
 779                         {
 780                                 delay = 7000;
 781                         }
 782                         else
 783                         {
 784                                 delay = (((cdr.Mode & MODE_SPEED) ? 2 : 1) * (1000000));
 785                                 CDRMISC_INT((cdr.Mode & MODE_SPEED) ? cdReadTime / 2 : cdReadTime);
 786                         }
 787                         AddIrqQueue(CdlPause + 0x100, delay);
 788                         cdr.Ctrl |= 0x80;
 789                         break;
 790
 791                 case CdlPause + 0x100:
 792                         cdr.StatP &= ~STATUS_READ;
 793                         cdr.Result[0] = cdr.StatP;
 794                         cdr.Stat = Complete;
 795                         break;
 796
 797                 case CdlReset:
 798                         cdr.Muted = FALSE;
 799                         cdr.Mode = 0x20; /* This fixes This is Football 2, Pooh's Party lockups */
 800                         AddIrqQueue(CdlReset + 0x100, 4100000);
 801                         no_busy_error = 1;
 802                         start_rotating = 1;
 803                         break;
 804
 805                 case CdlReset + 0x100:
 806                         cdr.Stat = Complete;
 807                         break;
 808
 809                 case CdlMute:
 810                         cdr.Muted = TRUE;
 811                         break;
 812
 813                 case CdlDemute:
 814                         cdr.Muted = FALSE;
 815                         break;
 816
 817                 case CdlSetfilter:
 818                         cdr.File = cdr.Param[0];
 819                         cdr.Channel = cdr.Param[1];
 820                         break;
 821
 822                 case CdlSetmode:
 823                         no_busy_error = 1;
 824                         break;
 825
 826                 case CdlGetparam:
 827                         /* Gameblabla : According to mednafen, Result size should be 5 and done this way. */
 828                         SetResultSize(5);
 829                         cdr.Result[1] = cdr.Mode;
 830                         cdr.Result[2] = 0;
 831                         cdr.Result[3] = cdr.File;
 832                         cdr.Result[4] = cdr.Channel;
 833                         no_busy_error = 1;
 834                         break;
 835
 836                 case CdlGetlocL:
 837                         SetResultSize(8);
 838                         memcpy(cdr.Result, cdr.Transfer, 8);
 839                         break;
 840
 841                 case CdlGetlocP:
 842                         SetResultSize(8);
 843                         memcpy(&cdr.Result, &cdr.subq, 8);
 844                         break;
 845
 846                 case CdlReadT: // SetSession?
 847                         // really long
 848                         AddIrqQueue(CdlReadT + 0x100, cdReadTime * 290 / 4);
 849                         start_rotating = 1;
 850                         break;
 851
 852                 case CdlReadT + 0x100:
 853                         cdr.Stat = Complete;
 854                         break;
 855
 856                 case CdlGetTN:
 857                         SetResultSize(3);
 858                         if (CDR_getTN(cdr.ResultTN) == -1) {
 859                                 cdr.Stat = DiskError;
 860                                 cdr.Result[0] |= STATUS_ERROR;
 861                         } else {
 862                                 cdr.Stat = Acknowledge;
 863                                 cdr.Result[1] = itob(cdr.ResultTN[0]);
 864                                 cdr.Result[2] = itob(cdr.ResultTN[1]);
 865                         }
 866                         break;
 867
 868                 case CdlGetTD:
 869                         cdr.Track = btoi(cdr.Param[0]);
 870                         SetResultSize(4);
 871                         if (CDR_getTD(cdr.Track, cdr.ResultTD) == -1) {
 872                                 cdr.Stat = DiskError;
 873                                 cdr.Result[0] |= STATUS_ERROR;
 874                         } else {
 875                                 cdr.Stat = Acknowledge;
 876                                 cdr.Result[0] = cdr.StatP;
 877                                 cdr.Result[1] = itob(cdr.ResultTD[2]);
 878                                 cdr.Result[2] = itob(cdr.ResultTD[1]);
 879                                 /* According to Nocash's documentation, the function doesn't care about ff.
 880                                  * This can be seen also in Mednafen's implementation. */
 881                                 //cdr.Result[3] = itob(cdr.ResultTD[0]);
 882                         }
 883                         break;
 884
 885                 case CdlSeekL:
 886                 case CdlSeekP:
 887                         StopCdda();
 888                         StopReading();
 889                         cdr.StatP |= STATUS_SEEK;
 890
 891                         /*
 892                         Crusaders of Might and Magic = 0.5x-4x
 893                         - fix cutscene speech start
 894
 895                         Eggs of Steel = 2x-?
 896                         - fix new game
 897
 898                         Medievil = ?-4x
 899                         - fix cutscene speech
 900
 901                         Rockman X5 = 0.5-4x
 902                         - fix capcom logo
 903                         */
 904                         CDRMISC_INT(cdr.Seeked == SEEK_DONE ? 0x800 : cdReadTime * 4);
 905                         cdr.Seeked = SEEK_PENDING;
 906                         start_rotating = 1;
 907                         break;
 908
 909                 case CdlTest:
 910                         switch (cdr.Param[0]) {
 911                                 case 0x20: // System Controller ROM Version
 912                                         SetResultSize(4);
 913                                         memcpy(cdr.Result, Test20, 4);
 914                                         break;
 915                                 case 0x22:
 916                                         SetResultSize(8);
 917                                         memcpy(cdr.Result, Test22, 4);
 918                                         break;
 919                                 case 0x23: case 0x24:
 920                                         SetResultSize(8);
 921                                         memcpy(cdr.Result, Test23, 4);
 922                                         break;
 923                         }
 924                         no_busy_error = 1;
 925                         break;
 926
 927                 case CdlID:
 928                         AddIrqQueue(CdlID + 0x100, 20480);
 929                         break;
 930
 931                 case CdlID + 0x100:
 932                         SetResultSize(8);
 933                         cdr.Result[0] = cdr.StatP;
 934                         cdr.Result[1] = 0;
 935                         cdr.Result[2] = 0;
 936                         cdr.Result[3] = 0;
 937
 938                         // 0x10 - audio | 0x40 - disk missing | 0x80 - unlicensed
 939                         if (CDR_getStatus(&stat) == -1 || stat.Type == 0 || stat.Type == 0xff) {
 940                                 cdr.Result[1] = 0xc0;
 941                         }
 942                         else {
 943                                 if (stat.Type == 2)
 944                                         cdr.Result[1] |= 0x10;
 945                                 if (CdromId[0] == '\0')
 946                                         cdr.Result[1] |= 0x80;
 947                         }
 948                         cdr.Result[0] |= (cdr.Result[1] >> 4) & 0x08;
 949
 950                         strncpy((char *)&cdr.Result[4], "PCSX", 4);
 951                         cdr.Stat = Complete;
 952                         break;
 953
 954                 case CdlInit:
 955                         // yes, it really sets STATUS_SHELLOPEN
 956                         cdr.StatP |= STATUS_SHELLOPEN;
 957                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
 958                         CDRLID_INT(20480);
 959                         no_busy_error = 1;
 960                         start_rotating = 1;
 961                         break;
 962
 963                 case CdlGetQ:
 964                         no_busy_error = 1;
 965                         break;
 966
 967                 case CdlReadToc:
 968                         AddIrqQueue(CdlReadToc + 0x100, cdReadTime * 180 / 4);
 969                         no_busy_error = 1;
 970                         start_rotating = 1;
 971                         break;
 972
 973                 case CdlReadToc + 0x100:
 974                         cdr.Stat = Complete;
 975                         no_busy_error = 1;
 976                         break;
 977
 978                 case CdlReadN:
 979                 case CdlReadS:
 980                         if (cdr.SetlocPending) {
 981                                 seekTime = abs(msf2sec(cdr.SetSectorPlay) - msf2sec(cdr.SetSector)) * (cdReadTime / 200);
 982                                 /*
 983                                 * Gameblabla :
 984                                 * It was originally set to 1000000 for Driver, however it is not high enough for Worms Pinball
 985                                 * and was unreliable for that game.
 986                                 * I also tested it against Mednafen and Driver's titlescreen music starts 25 frames later, not immediatly.
 987                                 *
 988                                 * Obviously, this isn't perfect but right now, it should be a bit better.
 989                                 * Games to test this against if you change that setting :
 990                                 * - Driver (titlescreen music delay and retry mission)
 991                                 * - Worms Pinball (Will either not boot or crash in the memory card screen)
 992                                 * - Viewpoint (short pauses if the delay in the ingame music is too long)
 993                                 *
 994                                 * It seems that 3386880 * 5 is too much for Driver's titlescreen and it starts skipping.
 995                                 * However, 1000000 is not enough for Worms Pinball to reliably boot.
 996                                 */
 997                                 if(seekTime > 3386880 * 2) seekTime = 3386880 * 2;
 998                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 999                                 cdr.SetlocPending = 0;
1000                                 cdr.m_locationChanged = TRUE;
1001                         }
1002                         Find_CurTrack(cdr.SetSectorPlay);
1003
1004                         if ((cdr.Mode & MODE_CDDA) && cdr.CurTrack > 1)
1005                                 // Read* acts as play for cdda tracks in cdda mode
1006                                 goto do_CdlPlay;
1007
1008                         cdr.Reading = 1;
1009                         cdr.FirstSector = 1;
1010
1011                         // Fighting Force 2 - update subq time immediately
1012                         // - fixes new game
1013                         ReadTrack(cdr.SetSectorPlay);
1014
1015
1016                         // Crusaders of Might and Magic - update getlocl now
1017                         // - fixes cutscene speech
1018                         {
1019                                 u8 *buf = CDR_getBuffer();
1020                                 if (buf != NULL)
1021                                         memcpy(cdr.Transfer, buf, 8);
1022                         }
1023
1024                         /*
1025                         Duke Nukem: Land of the Babes - seek then delay read for one frame
1026                         - fixes cutscenes
1027                         C-12 - Final Resistance - doesn't like seek
1028                         */
1029
1030                         /*
1031                                 By nicolasnoble from PCSX Redux :
1032                                 "It LOOKS like this logic is wrong, therefore disabling it with `&& false` for now.
1033                                 For "PoPoLoCrois Monogatari II", the game logic will soft lock and will never issue GetLocP to detect
1034                                 the end of its XA streams, as it seems to assume ReadS will not return a status byte with the SEEK
1035                                 flag set. I think the reasonning is that since it's invalid to call GetLocP while seeking, the game
1036                                 tries to protect itself against errors by preventing from issuing a GetLocP while it knows the
1037                                 last status was "seek". But this makes the logic just softlock as it'll never get a notification
1038                                 about the fact the drive is done seeking and the read actually started.
1039
1040                                 In other words, this state machine here is probably wrong in assuming the response to ReadS/ReadN is
1041                                 done right away. It's rather when it's done seeking, and the read has actually started. This probably
1042                                 requires a bit more work to make sure seek delays are processed properly.
1043                                 Checked with a few games, this seems to work fine."
1044
1045                                 Gameblabla additional notes :
1046                                 This still needs the "+ seekTime" that PCSX Redux doesn't have for the Driver "retry" mission error.
1047                         */
1048                         cdr.StatP |= STATUS_READ;
1049                         cdr.StatP &= ~STATUS_SEEK;
1050
1051                         CDREAD_INT(((cdr.Mode & 0x80) ? (cdReadTime) : cdReadTime * 2) + seekTime);
1052
1053                         cdr.Result[0] = cdr.StatP;
1054                         start_rotating = 1;
1055                         break;
1056                 case CdlSync:
1057                 default:
1058                         CDR_LOG_I("Invalid command: %02x\n", Irq);
1059                         error = ERROR_INVALIDCMD;
1060                         // FALLTHROUGH
1061
1062                 set_error:
1063                         SetResultSize(2);
1064                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1065                         cdr.Result[1] = error;
1066                         cdr.Stat = DiskError;
1067                         break;
1068         }
1069
1070         if (cdr.DriveState == DRIVESTATE_STOPPED && start_rotating) {
1071                 cdr.DriveState = DRIVESTATE_STANDBY;
1072                 cdr.StatP |= STATUS_ROTATING;
1073         }
1074
1075         if (!no_busy_error) {
1076                 switch (cdr.DriveState) {
1077                 case DRIVESTATE_LID_OPEN:
1078                 case DRIVESTATE_RESCAN_CD:
1079                 case DRIVESTATE_PREPARE_CD:
1080                         SetResultSize(2);
1081                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1082                         cdr.Result[1] = ERROR_NOTREADY;
1083                         cdr.Stat = DiskError;
1084                         break;
1085                 }
1086         }
1087
1088 finish:
1089         setIrq();
1090         cdr.ParamC = 0;
1091
1092 #ifdef CDR_LOG_CMD_IRQ
1093         {
1094                 int i;
1095                 SysPrintf("CDR IRQ %d cmd %02x stat %02x: ",
1096                         !!(cdr.Stat & cdr.Reg2), Irq, cdr.Stat);
1097                 for (i = 0; i < cdr.ResultC; i++)
1098                         SysPrintf("%02x ", cdr.Result[i]);
1099                 SysPrintf("\n");
1100         }
1101 #endif
1102 }
1103
1104 #ifdef HAVE_ARMV7
1105  #define ssat32_to_16(v) \
1106   asm("ssat %0,#16,%1" : "=r" (v) : "r" (v))
1107 #else
1108  #define ssat32_to_16(v) do { \
1109   if (v < -32768) v = -32768; \
1110   else if (v > 32767) v = 32767; \
1111  } while (0)
1112 #endif
1113
1114 void cdrAttenuate(s16 *buf, int samples, int stereo)
1115 {
1116         int i, l, r;
1117         int ll = cdr.AttenuatorLeftToLeft;
1118         int lr = cdr.AttenuatorLeftToRight;
1119         int rl = cdr.AttenuatorRightToLeft;
1120         int rr = cdr.AttenuatorRightToRight;
1121
1122         if (lr == 0 && rl == 0 && 0x78 <= ll && ll <= 0x88 && 0x78 <= rr && rr <= 0x88)
1123                 return;
1124
1125         if (!stereo && ll == 0x40 && lr == 0x40 && rl == 0x40 && rr == 0x40)
1126                 return;
1127
1128         if (stereo) {
1129                 for (i = 0; i < samples; i++) {
1130                         l = buf[i * 2];
1131                         r = buf[i * 2 + 1];
1132                         l = (l * ll + r * rl) >> 7;
1133                         r = (r * rr + l * lr) >> 7;
1134                         ssat32_to_16(l);
1135                         ssat32_to_16(r);
1136                         buf[i * 2] = l;
1137                         buf[i * 2 + 1] = r;
1138                 }
1139         }
1140         else {
1141                 for (i = 0; i < samples; i++) {
1142                         l = buf[i];
1143                         l = l * (ll + rl) >> 7;
1144                         //r = r * (rr + lr) >> 7;
1145                         ssat32_to_16(l);
1146                         //ssat32_to_16(r);
1147                         buf[i] = l;
1148                 }
1149         }
1150 }
1151
1152 void cdrReadInterrupt() {
1153         u8 *buf;
1154
1155         if (!cdr.Reading)
1156                 return;
1157
1158         if (cdr.Irq || cdr.Stat) {
1159                 CDR_LOG_I("cdrom: read stat hack %02x %x\n", cdr.Irq, cdr.Stat);
1160                 CDREAD_INT(0x1000);
1161                 return;
1162         }
1163
1164         cdr.OCUP = 1;
1165         SetResultSize(1);
1166         cdr.StatP |= STATUS_READ|STATUS_ROTATING;
1167         cdr.StatP &= ~STATUS_SEEK;
1168         cdr.Result[0] = cdr.StatP;
1169         cdr.Seeked = SEEK_DONE;
1170
1171         ReadTrack(cdr.SetSectorPlay);
1172
1173         buf = CDR_getBuffer();
1174         if (buf == NULL)
1175                 cdr.NoErr = 0;
1176
1177         if (!cdr.NoErr) {
1178                 CDR_LOG_I("cdrReadInterrupt() Log: err\n");
1179                 memset(cdr.Transfer, 0, DATA_SIZE);
1180                 cdr.Stat = DiskError;
1181                 cdr.Result[0] |= STATUS_ERROR;
1182                 CDREAD_INT((cdr.Mode & 0x80) ? (cdReadTime / 2) : cdReadTime);
1183                 return;
1184         }
1185
1186         memcpy(cdr.Transfer, buf, DATA_SIZE);
1187         CheckPPFCache(cdr.Transfer, cdr.Prev[0], cdr.Prev[1], cdr.Prev[2]);
1188
1189
1190         CDR_LOG("cdrReadInterrupt() Log: cdr.Transfer %x:%x:%x\n", cdr.Transfer[0], cdr.Transfer[1], cdr.Transfer[2]);
1191
1192         if ((!cdr.Muted) && (cdr.Mode & MODE_STRSND) && (!Config.Xa) && (cdr.FirstSector != -1)) { // CD-XA
1193                 // Firemen 2: Multi-XA files - briefings, cutscenes
1194                 if( cdr.FirstSector == 1 && (cdr.Mode & MODE_SF)==0 ) {
1195                         cdr.File = cdr.Transfer[4 + 0];
1196                         cdr.Channel = cdr.Transfer[4 + 1];
1197                 }
1198
1199                 /* Gameblabla
1200                  * Skips playing on channel 255.
1201                  * Fixes missing audio in Blue's Clues : Blue's Big Musical. (Should also fix Taxi 2)
1202                  * TODO : Check if this is the proper behaviour.
1203                  * */
1204                 if((cdr.Transfer[4 + 2] & 0x4) &&
1205                          (cdr.Transfer[4 + 1] == cdr.Channel) &&
1206                          (cdr.Transfer[4 + 0] == cdr.File) && cdr.Channel != 255) {
1207                         int ret = xa_decode_sector(&cdr.Xa, cdr.Transfer+4, cdr.FirstSector);
1208                         if (!ret) {
1209                                 cdrAttenuate(cdr.Xa.pcm, cdr.Xa.nsamples, cdr.Xa.stereo);
1210                                 /*
1211                                  * Gameblabla -
1212                                  * This is a hack for Megaman X4, Castlevania etc...
1213                                  * that regressed from the new m_locationChanged and CDROM timings changes.
1214                                  * It is mostly noticeable in Castevania however and the stuttering can be very jarring.
1215                                  *
1216                                  * According to PCSX redux authors, we shouldn't cause a location change if
1217                                  * the sector difference is too small.
1218                                  * I attempted to go with that approach but came empty handed.
1219                                  * So for now, let's just set cdr.m_locationChanged to false when playing back any ADPCM samples.
1220                                  * This does not regress Crash Team Racing's intro at least.
1221                                 */
1222                                 cdr.m_locationChanged = FALSE;
1223                                 SPU_playADPCMchannel(&cdr.Xa);
1224                                 cdr.FirstSector = 0;
1225                         }
1226                         else cdr.FirstSector = -1;
1227                 }
1228         }
1229
1230         cdr.SetSectorPlay[2]++;
1231         if (cdr.SetSectorPlay[2] == 75) {
1232                 cdr.SetSectorPlay[2] = 0;
1233                 cdr.SetSectorPlay[1]++;
1234                 if (cdr.SetSectorPlay[1] == 60) {
1235                         cdr.SetSectorPlay[1] = 0;
1236                         cdr.SetSectorPlay[0]++;
1237                 }
1238         }
1239
1240         cdr.Readed = 0;
1241
1242         uint32_t delay = (cdr.Mode & MODE_SPEED) ? (cdReadTime / 2) : cdReadTime;
1243         if (cdr.m_locationChanged) {
1244                 CDREAD_INT(delay * 30);
1245                 cdr.m_locationChanged = FALSE;
1246         } else {
1247                 CDREAD_INT(delay);
1248         }
1249
1250         /*
1251         Croc 2: $40 - only FORM1 (*)
1252         Judge Dredd: $C8 - only FORM1 (*)
1253         Sim Theme Park - no adpcm at all (zero)
1254         */
1255
1256         if (!(cdr.Mode & MODE_STRSND) || !(cdr.Transfer[4+2] & 0x4)) {
1257                 cdr.Stat = DataReady;
1258                 setIrq();
1259         }
1260
1261         // update for CdlGetlocP
1262         ReadTrack(cdr.SetSectorPlay);
1263 }
1264
1265 /*
1266 cdrRead0:
1267         bit 0,1 - mode
1268         bit 2 - unknown
1269         bit 3 - unknown
1270         bit 4 - unknown
1271         bit 5 - 1 result ready
1272         bit 6 - 1 dma ready
1273         bit 7 - 1 command being processed
1274 */
1275
1276 unsigned char cdrRead0(void) {
1277         if (cdr.ResultReady)
1278                 cdr.Ctrl |= 0x20;
1279         else
1280                 cdr.Ctrl &= ~0x20;
1281
1282         if (cdr.OCUP)
1283                 cdr.Ctrl |= 0x40;
1284 //  else
1285 //              cdr.Ctrl &= ~0x40;
1286
1287         // What means the 0x10 and the 0x08 bits? I only saw it used by the bios
1288         cdr.Ctrl |= 0x18;
1289
1290         CDR_LOG_IO("cdr r0: %02x\n", cdr.Ctrl);
1291
1292         return psxHu8(0x1800) = cdr.Ctrl;
1293 }
1294
1295 void cdrWrite0(unsigned char rt) {
1296         CDR_LOG_IO("cdr w0: %02x\n", rt);
1297
1298         cdr.Ctrl = (rt & 3) | (cdr.Ctrl & ~3);
1299 }
1300
1301 unsigned char cdrRead1(void) {
1302         if ((cdr.ResultP & 0xf) < cdr.ResultC)
1303                 psxHu8(0x1801) = cdr.Result[cdr.ResultP & 0xf];
1304         else
1305                 psxHu8(0x1801) = 0;
1306         cdr.ResultP++;
1307         if (cdr.ResultP == cdr.ResultC)
1308                 cdr.ResultReady = 0;
1309
1310         CDR_LOG_IO("cdr r1: %02x\n", psxHu8(0x1801));
1311
1312         return psxHu8(0x1801);
1313 }
1314
1315 void cdrWrite1(unsigned char rt) {
1316         CDR_LOG_IO("cdr w1: %02x\n", rt);
1317
1318         switch (cdr.Ctrl & 3) {
1319         case 0:
1320                 break;
1321         case 3:
1322                 cdr.AttenuatorRightToRightT = rt;
1323                 return;
1324         default:
1325                 return;
1326         }
1327
1328         cdr.Cmd = rt;
1329         cdr.OCUP = 0;
1330
1331 #ifdef CDR_LOG_CMD_IRQ
1332         SysPrintf("CD1 write: %x (%s)", rt, CmdName[rt]);
1333         if (cdr.ParamC) {
1334                 SysPrintf(" Param[%d] = {", cdr.ParamC);
1335                 for (i = 0; i < cdr.ParamC; i++)
1336                         SysPrintf(" %x,", cdr.Param[i]);
1337                 SysPrintf("}\n");
1338         } else {
1339                 SysPrintf("\n");
1340         }
1341 #endif
1342
1343         cdr.ResultReady = 0;
1344         cdr.Ctrl |= 0x80;
1345         // cdr.Stat = NoIntr;
1346         AddIrqQueue(cdr.Cmd, 0x800);
1347
1348         switch (cdr.Cmd) {
1349
1350         case CdlReadN:
1351         case CdlReadS:
1352         case CdlPause:
1353                 StopCdda();
1354                 StopReading();
1355                 break;
1356
1357         case CdlInit:
1358         case CdlReset:
1359                 cdr.Seeked = SEEK_DONE;
1360                 StopCdda();
1361                 StopReading();
1362                 break;
1363
1364         case CdlSetmode:
1365                 CDR_LOG("cdrWrite1() Log: Setmode %x\n", cdr.Param[0]);
1366
1367                 cdr.Mode = cdr.Param[0];
1368
1369                 // Squaresoft on PlayStation 1998 Collector's CD Vol. 1
1370                 // - fixes choppy movie sound
1371                 if( cdr.Play && (cdr.Mode & MODE_CDDA) == 0 )
1372                         StopCdda();
1373                 break;
1374         }
1375 }
1376
1377 unsigned char cdrRead2(void) {
1378         unsigned char ret;
1379
1380         if (cdr.Readed == 0) {
1381                 ret = 0;
1382         } else {
1383                 ret = *pTransfer++;
1384         }
1385
1386         CDR_LOG_IO("cdr r2: %02x\n", ret);
1387         return ret;
1388 }
1389
1390 void cdrWrite2(unsigned char rt) {
1391         CDR_LOG_IO("cdr w2: %02x\n", rt);
1392
1393         switch (cdr.Ctrl & 3) {
1394         case 0:
1395                 if (cdr.ParamC < 8) // FIXME: size and wrapping
1396                         cdr.Param[cdr.ParamC++] = rt;
1397                 return;
1398         case 1:
1399                 cdr.Reg2 = rt;
1400                 setIrq();
1401                 return;
1402         case 2:
1403                 cdr.AttenuatorLeftToLeftT = rt;
1404                 return;
1405         case 3:
1406                 cdr.AttenuatorRightToLeftT = rt;
1407                 return;
1408         }
1409 }
1410
1411 unsigned char cdrRead3(void) {
1412         if (cdr.Ctrl & 0x1)
1413                 psxHu8(0x1803) = cdr.Stat | 0xE0;
1414         else
1415                 psxHu8(0x1803) = cdr.Reg2 | 0xE0;
1416
1417         CDR_LOG_IO("cdr r3: %02x\n", psxHu8(0x1803));
1418         return psxHu8(0x1803);
1419 }
1420
1421 void cdrWrite3(unsigned char rt) {
1422         CDR_LOG_IO("cdr w3: %02x\n", rt);
1423
1424         switch (cdr.Ctrl & 3) {
1425         case 0:
1426                 break; // transfer
1427         case 1:
1428                 cdr.Stat &= ~rt;
1429
1430                 if (rt & 0x40)
1431                         cdr.ParamC = 0;
1432                 return;
1433         case 2:
1434                 cdr.AttenuatorLeftToRightT = rt;
1435                 return;
1436         case 3:
1437                 if (rt & 0x20) {
1438                         memcpy(&cdr.AttenuatorLeftToLeft, &cdr.AttenuatorLeftToLeftT, 4);
1439                         CDR_LOG_I("CD-XA Volume: %02x %02x | %02x %02x\n",
1440                                 cdr.AttenuatorLeftToLeft, cdr.AttenuatorLeftToRight,
1441                                 cdr.AttenuatorRightToLeft, cdr.AttenuatorRightToRight);
1442                 }
1443                 return;
1444         }
1445
1446         if ((rt & 0x80) && cdr.Readed == 0) {
1447                 cdr.Readed = 1;
1448                 pTransfer = cdr.Transfer;
1449
1450                 switch (cdr.Mode & 0x30) {
1451                         case MODE_SIZE_2328:
1452                         case 0x00:
1453                                 pTransfer += 12;
1454                                 break;
1455
1456                         case MODE_SIZE_2340:
1457                                 pTransfer += 0;
1458                                 break;
1459
1460                         default:
1461                                 break;
1462                 }
1463         }
1464 }
1465
1466 void psxDma3(u32 madr, u32 bcr, u32 chcr) {
1467         u32 cdsize;
1468         int size;
1469         u8 *ptr;
1470
1471         CDR_LOG("psxDma3() Log: *** DMA 3 *** %x addr = %x size = %x\n", chcr, madr, bcr);
1472
1473         switch (chcr) {
1474                 case 0x11000000:
1475                 case 0x11400100:
1476                         if (cdr.Readed == 0) {
1477                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NOT READY\n");
1478                                 break;
1479                         }
1480
1481                         cdsize = (bcr & 0xffff) * 4;
1482
1483                         // Ape Escape: bcr = 0001 / 0000
1484                         // - fix boot
1485                         if( cdsize == 0 )
1486                         {
1487                                 switch (cdr.Mode & (MODE_SIZE_2340|MODE_SIZE_2328)) {
1488                                         case MODE_SIZE_2340: cdsize = 2340; break;
1489                                         case MODE_SIZE_2328: cdsize = 2328; break;
1490                                         default:
1491                                         case MODE_SIZE_2048: cdsize = 2048; break;
1492                                 }
1493                         }
1494
1495
1496                         ptr = (u8 *)PSXM(madr);
1497                         if (ptr == NULL) {
1498                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NULL Pointer!\n");
1499                                 break;
1500                         }
1501
1502                         /*
1503                         GS CDX: Enhancement CD crash
1504                         - Setloc 0:0:0
1505                         - CdlPlay
1506                         - Spams DMA3 and gets buffer overrun
1507                         */
1508                         size = CD_FRAMESIZE_RAW - (pTransfer - cdr.Transfer);
1509                         if (size > cdsize)
1510                                 size = cdsize;
1511                         if (size > 0)
1512                         {
1513                                 memcpy(ptr, pTransfer, size);
1514                         }
1515
1516                         psxCpu->Clear(madr, cdsize / 4);
1517                         pTransfer += cdsize;
1518
1519                         if( chcr == 0x11400100 ) {
1520                                 HW_DMA3_MADR = SWAPu32(madr + cdsize);
1521                                 CDRDMA_INT( (cdsize/4) / 4 );
1522                         }
1523                         else if( chcr == 0x11000000 ) {
1524                                 // CDRDMA_INT( (cdsize/4) * 1 );
1525                                 // halted
1526                                 psxRegs.cycle += (cdsize/4) * 24/2;
1527                                 CDRDMA_INT(16);
1528                         }
1529                         return;
1530
1531                 default:
1532                         CDR_LOG("psxDma3() Log: Unknown cddma %x\n", chcr);
1533                         break;
1534         }
1535
1536         HW_DMA3_CHCR &= SWAP32(~0x01000000);
1537         DMA_INTERRUPT(3);
1538 }
1539
1540 void cdrDmaInterrupt()
1541 {
1542         if (HW_DMA3_CHCR & SWAP32(0x01000000))
1543         {
1544                 HW_DMA3_CHCR &= SWAP32(~0x01000000);
1545                 DMA_INTERRUPT(3);
1546         }
1547 }
1548
1549 static void getCdInfo(void)
1550 {
1551         u8 tmp;
1552
1553         CDR_getTN(cdr.ResultTN);
1554         CDR_getTD(0, cdr.SetSectorEnd);
1555         tmp = cdr.SetSectorEnd[0];
1556         cdr.SetSectorEnd[0] = cdr.SetSectorEnd[2];
1557         cdr.SetSectorEnd[2] = tmp;
1558 }
1559
1560 void cdrReset() {
1561         memset(&cdr, 0, sizeof(cdr));
1562         cdr.CurTrack = 1;
1563         cdr.File = 1;
1564         cdr.Channel = 1;
1565         cdr.Reg2 = 0x1f;
1566         cdr.Stat = NoIntr;
1567         cdr.DriveState = DRIVESTATE_STANDBY;
1568         cdr.StatP = STATUS_ROTATING;
1569         pTransfer = cdr.Transfer;
1570
1571         // BIOS player - default values
1572         cdr.AttenuatorLeftToLeft = 0x80;
1573         cdr.AttenuatorLeftToRight = 0x00;
1574         cdr.AttenuatorRightToLeft = 0x00;
1575         cdr.AttenuatorRightToRight = 0x80;
1576
1577         getCdInfo();
1578 }
1579
1580 int cdrFreeze(void *f, int Mode) {
1581         u32 tmp;
1582         u8 tmpp[3];
1583
1584         if (Mode == 0 && !Config.Cdda)
1585                 CDR_stop();
1586
1587         cdr.freeze_ver = 0x63647202;
1588         gzfreeze(&cdr, sizeof(cdr));
1589
1590         if (Mode == 1) {
1591                 cdr.ParamP = cdr.ParamC;
1592                 tmp = pTransfer - cdr.Transfer;
1593         }
1594
1595         gzfreeze(&tmp, sizeof(tmp));
1596
1597         if (Mode == 0) {
1598                 getCdInfo();
1599
1600                 pTransfer = cdr.Transfer + tmp;
1601
1602                 // read right sub data
1603                 tmpp[0] = btoi(cdr.Prev[0]);
1604                 tmpp[1] = btoi(cdr.Prev[1]);
1605                 tmpp[2] = btoi(cdr.Prev[2]);
1606                 cdr.Prev[0]++;
1607                 ReadTrack(tmpp);
1608
1609                 if (cdr.Play) {
1610                         if (cdr.freeze_ver < 0x63647202)
1611                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 3);
1612
1613                         Find_CurTrack(cdr.SetSectorPlay);
1614                         if (!Config.Cdda)
1615                                 CDR_play(cdr.SetSectorPlay);
1616                 }
1617
1618                 if ((cdr.freeze_ver & 0xffffff00) != 0x63647200) {
1619                         // old versions did not latch Reg2, have to fixup..
1620                         if (cdr.Reg2 == 0) {
1621                                 SysPrintf("cdrom: fixing up old savestate\n");
1622                                 cdr.Reg2 = 7;
1623                         }
1624                         // also did not save Attenuator..
1625                         if ((cdr.AttenuatorLeftToLeft | cdr.AttenuatorLeftToRight
1626                              | cdr.AttenuatorRightToLeft | cdr.AttenuatorRightToRight) == 0)
1627                         {
1628                                 cdr.AttenuatorLeftToLeft = cdr.AttenuatorRightToRight = 0x80;
1629                         }
1630                 }
1631         }
1632
1633         return 0;
1634 }
1635
1636 void LidInterrupt() {
1637         getCdInfo();
1638         StopCdda();
1639         cdrLidSeekInterrupt();
1640 }