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.Result[0] = cdr.StatP;
 455                 cdr.Result[1] = cdr.subq.Track;
 456                 cdr.Result[2] = cdr.subq.Index;
 457
 458                 abs_lev_chselect = cdr.subq.Absolute[1] & 0x01;
 459
 460                 /* 8 is a hack. For accuracy, it should be 588. */
 461                 for (i = 0; i < 8; i++)
 462                 {
 463                         abs_lev_max = MAX_VALUE(abs_lev_max, abs(read_buf[i * 2 + abs_lev_chselect]));
 464                 }
 465                 abs_lev_max = MIN_VALUE(abs_lev_max, 32767);
 466                 abs_lev_max |= abs_lev_chselect << 15;
 467
 468                 if (cdr.subq.Absolute[2] & 0x10) {
 469                         cdr.Result[3] = cdr.subq.Relative[0];
 470                         cdr.Result[4] = cdr.subq.Relative[1] | 0x80;
 471                         cdr.Result[5] = cdr.subq.Relative[2];
 472                 }
 473                 else {
 474                         cdr.Result[3] = cdr.subq.Absolute[0];
 475                         cdr.Result[4] = cdr.subq.Absolute[1];
 476                         cdr.Result[5] = cdr.subq.Absolute[2];
 477                 }
 478
 479                 cdr.Result[6] = abs_lev_max >> 0;
 480                 cdr.Result[7] = abs_lev_max >> 8;
 481
 482                 // Rayman: Logo freeze (resultready + dataready)
 483                 cdr.ResultReady = 1;
 484                 cdr.Stat = DataReady;
 485
 486                 SetResultSize(8);
 487                 setIrq();
 488         }
 489 }
 490
 491 // also handles seek
 492 void cdrPlayInterrupt()
 493 {
 494         if (cdr.Seeked == SEEK_PENDING) {
 495                 if (cdr.Stat) {
 496                         CDR_LOG_I("cdrom: seek stat hack\n");
 497                         CDRMISC_INT(0x1000);
 498                         return;
 499                 }
 500                 SetResultSize(1);
 501                 cdr.StatP |= STATUS_ROTATING;
 502                 cdr.StatP &= ~STATUS_SEEK;
 503                 cdr.Result[0] = cdr.StatP;
 504                 cdr.Seeked = SEEK_DONE;
 505                 if (cdr.Irq == 0) {
 506                         cdr.Stat = Complete;
 507                         setIrq();
 508                 }
 509
 510                 if (cdr.SetlocPending) {
 511                         memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 512                         cdr.SetlocPending = 0;
 513                         cdr.m_locationChanged = TRUE;
 514                 }
 515                 Find_CurTrack(cdr.SetSectorPlay);
 516                 ReadTrack(cdr.SetSectorPlay);
 517                 cdr.TrackChanged = FALSE;
 518         }
 519
 520         if (!cdr.Play) return;
 521
 522         CDR_LOG( "CDDA - %d:%d:%d\n",
 523                 cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2] );
 524
 525         if (memcmp(cdr.SetSectorPlay, cdr.SetSectorEnd, 3) == 0) {
 526                 StopCdda();
 527                 cdr.TrackChanged = TRUE;
 528         }
 529         else {
 530                 CDR_readCDDA(cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2], (u8 *)read_buf);
 531         }
 532
 533         if (!cdr.Irq && !cdr.Stat && (cdr.Mode & (MODE_AUTOPAUSE|MODE_REPORT)))
 534                 cdrPlayInterrupt_Autopause();
 535
 536         if (CDR_readCDDA && !cdr.Muted && !Config.Cdda) {
 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                         StopReading();
 690                         if (!Config.Cdda)
 691                                 CDR_play(cdr.SetSectorPlay);
 692
 693                         // Vib Ribbon: gameplay checks flag
 694                         cdr.StatP &= ~STATUS_SEEK;
 695                         cdr.Result[0] = cdr.StatP;
 696
 697                         cdr.StatP |= STATUS_PLAY;
 698
 699                         // BIOS player - set flag again
 700                         cdr.Play = TRUE;
 701
 702                         CDRMISC_INT( cdReadTime );
 703                         start_rotating = 1;
 704                         break;
 705
 706                 case CdlForward:
 707                         // TODO: error 80 if stopped
 708                         cdr.Stat = Complete;
 709
 710                         // GameShark CD Player: Calls 2x + Play 2x
 711                         cdr.FastForward = 1;
 712                         cdr.FastBackward = 0;
 713                         break;
 714
 715                 case CdlBackward:
 716                         cdr.Stat = Complete;
 717
 718                         // GameShark CD Player: Calls 2x + Play 2x
 719                         cdr.FastBackward = 1;
 720                         cdr.FastForward = 0;
 721                         break;
 722
 723                 case CdlStandby:
 724                         if (cdr.DriveState != DRIVESTATE_STOPPED) {
 725                                 error = ERROR_INVALIDARG;
 726                                 goto set_error;
 727                         }
 728                         AddIrqQueue(CdlStandby + 0x100, cdReadTime * 125 / 2);
 729                         start_rotating = 1;
 730                         break;
 731
 732                 case CdlStandby + 0x100:
 733                         cdr.Stat = Complete;
 734                         break;
 735
 736                 case CdlStop:
 737                         if (cdr.Play) {
 738                                 // grab time for current track
 739                                 CDR_getTD((u8)(cdr.CurTrack), cdr.ResultTD);
 740
 741                                 cdr.SetSectorPlay[0] = cdr.ResultTD[2];
 742                                 cdr.SetSectorPlay[1] = cdr.ResultTD[1];
 743                                 cdr.SetSectorPlay[2] = cdr.ResultTD[0];
 744                         }
 745
 746                         StopCdda();
 747                         StopReading();
 748
 749                         delay = 0x800;
 750                         if (cdr.DriveState == DRIVESTATE_STANDBY)
 751                                 delay = cdReadTime * 30 / 2;
 752
 753                         cdr.DriveState = DRIVESTATE_STOPPED;
 754                         AddIrqQueue(CdlStop + 0x100, delay);
 755                         break;
 756
 757                 case CdlStop + 0x100:
 758                         cdr.StatP &= ~STATUS_ROTATING;
 759                         cdr.Result[0] = cdr.StatP;
 760                         cdr.Stat = Complete;
 761                         break;
 762
 763                 case CdlPause:
 764                         /*
 765                         Gundam Battle Assault 2: much slower (*)
 766                         - Fixes boot, gameplay
 767
 768                         Hokuto no Ken 2: slower
 769                         - Fixes intro + subtitles
 770
 771                         InuYasha - Feudal Fairy Tale: slower
 772                         - Fixes battles
 773                         */
 774                         /* Gameblabla - Tightening the timings (as taken from Duckstation).
 775                          * The timings from Duckstation are based upon hardware tests.
 776                          * Mednafen's timing don't work for Gundam Battle Assault 2 in PAL/50hz mode,
 777                          * seems to be timing sensitive as it can depend on the CPU's clock speed.
 778                          * */
 779                         if (cdr.DriveState == DRIVESTATE_STANDBY)
 780                         {
 781                                 delay = 7000;
 782                         }
 783                         else
 784                         {
 785                                 delay = (((cdr.Mode & MODE_SPEED) ? 2 : 1) * (1000000));
 786                                 CDRMISC_INT((cdr.Mode & MODE_SPEED) ? cdReadTime / 2 : cdReadTime);
 787                         }
 788                         AddIrqQueue(CdlPause + 0x100, delay);
 789                         cdr.Ctrl |= 0x80;
 790                         break;
 791
 792                 case CdlPause + 0x100:
 793                         cdr.StatP &= ~STATUS_READ;
 794                         cdr.Result[0] = cdr.StatP;
 795                         cdr.Stat = Complete;
 796                         break;
 797
 798                 case CdlReset:
 799                         cdr.Muted = FALSE;
 800                         cdr.Mode = 0x20; /* This fixes This is Football 2, Pooh's Party lockups */
 801                         AddIrqQueue(CdlReset + 0x100, 4100000);
 802                         no_busy_error = 1;
 803                         start_rotating = 1;
 804                         break;
 805
 806                 case CdlReset + 0x100:
 807                         cdr.Stat = Complete;
 808                         break;
 809
 810                 case CdlMute:
 811                         cdr.Muted = TRUE;
 812                         break;
 813
 814                 case CdlDemute:
 815                         cdr.Muted = FALSE;
 816                         break;
 817
 818                 case CdlSetfilter:
 819                         cdr.File = cdr.Param[0];
 820                         cdr.Channel = cdr.Param[1];
 821                         break;
 822
 823                 case CdlSetmode:
 824                         no_busy_error = 1;
 825                         break;
 826
 827                 case CdlGetparam:
 828                         /* Gameblabla : According to mednafen, Result size should be 5 and done this way. */
 829                         SetResultSize(5);
 830                         cdr.Result[1] = cdr.Mode;
 831                         cdr.Result[2] = 0;
 832                         cdr.Result[3] = cdr.File;
 833                         cdr.Result[4] = cdr.Channel;
 834                         no_busy_error = 1;
 835                         break;
 836
 837                 case CdlGetlocL:
 838                         SetResultSize(8);
 839                         memcpy(cdr.Result, cdr.Transfer, 8);
 840                         break;
 841
 842                 case CdlGetlocP:
 843                         SetResultSize(8);
 844                         memcpy(&cdr.Result, &cdr.subq, 8);
 845                         break;
 846
 847                 case CdlReadT: // SetSession?
 848                         // really long
 849                         AddIrqQueue(CdlReadT + 0x100, cdReadTime * 290 / 4);
 850                         start_rotating = 1;
 851                         break;
 852
 853                 case CdlReadT + 0x100:
 854                         cdr.Stat = Complete;
 855                         break;
 856
 857                 case CdlGetTN:
 858                         SetResultSize(3);
 859                         if (CDR_getTN(cdr.ResultTN) == -1) {
 860                                 cdr.Stat = DiskError;
 861                                 cdr.Result[0] |= STATUS_ERROR;
 862                         } else {
 863                                 cdr.Stat = Acknowledge;
 864                                 cdr.Result[1] = itob(cdr.ResultTN[0]);
 865                                 cdr.Result[2] = itob(cdr.ResultTN[1]);
 866                         }
 867                         break;
 868
 869                 case CdlGetTD:
 870                         cdr.Track = btoi(cdr.Param[0]);
 871                         SetResultSize(4);
 872                         if (CDR_getTD(cdr.Track, cdr.ResultTD) == -1) {
 873                                 cdr.Stat = DiskError;
 874                                 cdr.Result[0] |= STATUS_ERROR;
 875                         } else {
 876                                 cdr.Stat = Acknowledge;
 877                                 cdr.Result[0] = cdr.StatP;
 878                                 cdr.Result[1] = itob(cdr.ResultTD[2]);
 879                                 cdr.Result[2] = itob(cdr.ResultTD[1]);
 880                                 /* According to Nocash's documentation, the function doesn't care about ff.
 881                                  * This can be seen also in Mednafen's implementation. */
 882                                 //cdr.Result[3] = itob(cdr.ResultTD[0]);
 883                         }
 884                         break;
 885
 886                 case CdlSeekL:
 887                 case CdlSeekP:
 888                         StopCdda();
 889                         StopReading();
 890                         cdr.StatP |= STATUS_SEEK;
 891
 892                         /*
 893                         Crusaders of Might and Magic = 0.5x-4x
 894                         - fix cutscene speech start
 895
 896                         Eggs of Steel = 2x-?
 897                         - fix new game
 898
 899                         Medievil = ?-4x
 900                         - fix cutscene speech
 901
 902                         Rockman X5 = 0.5-4x
 903                         - fix capcom logo
 904                         */
 905                         CDRMISC_INT(cdr.Seeked == SEEK_DONE ? 0x800 : cdReadTime * 4);
 906                         cdr.Seeked = SEEK_PENDING;
 907                         start_rotating = 1;
 908                         break;
 909
 910                 case CdlTest:
 911                         switch (cdr.Param[0]) {
 912                                 case 0x20: // System Controller ROM Version
 913                                         SetResultSize(4);
 914                                         memcpy(cdr.Result, Test20, 4);
 915                                         break;
 916                                 case 0x22:
 917                                         SetResultSize(8);
 918                                         memcpy(cdr.Result, Test22, 4);
 919                                         break;
 920                                 case 0x23: case 0x24:
 921                                         SetResultSize(8);
 922                                         memcpy(cdr.Result, Test23, 4);
 923                                         break;
 924                         }
 925                         no_busy_error = 1;
 926                         break;
 927
 928                 case CdlID:
 929                         AddIrqQueue(CdlID + 0x100, 20480);
 930                         break;
 931
 932                 case CdlID + 0x100:
 933                         SetResultSize(8);
 934                         cdr.Result[0] = cdr.StatP;
 935                         cdr.Result[1] = 0;
 936                         cdr.Result[2] = 0;
 937                         cdr.Result[3] = 0;
 938
 939                         // 0x10 - audio | 0x40 - disk missing | 0x80 - unlicensed
 940                         if (CDR_getStatus(&stat) == -1 || stat.Type == 0 || stat.Type == 0xff) {
 941                                 cdr.Result[1] = 0xc0;
 942                         }
 943                         else {
 944                                 if (stat.Type == 2)
 945                                         cdr.Result[1] |= 0x10;
 946                                 if (CdromId[0] == '\0')
 947                                         cdr.Result[1] |= 0x80;
 948                         }
 949                         cdr.Result[0] |= (cdr.Result[1] >> 4) & 0x08;
 950
 951                         strncpy((char *)&cdr.Result[4], "PCSX", 4);
 952                         cdr.Stat = Complete;
 953                         break;
 954
 955                 case CdlInit:
 956                         // yes, it really sets STATUS_SHELLOPEN
 957                         cdr.StatP |= STATUS_SHELLOPEN;
 958                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
 959                         CDRLID_INT(20480);
 960                         no_busy_error = 1;
 961                         start_rotating = 1;
 962                         break;
 963
 964                 case CdlGetQ:
 965                         no_busy_error = 1;
 966                         break;
 967
 968                 case CdlReadToc:
 969                         AddIrqQueue(CdlReadToc + 0x100, cdReadTime * 180 / 4);
 970                         no_busy_error = 1;
 971                         start_rotating = 1;
 972                         break;
 973
 974                 case CdlReadToc + 0x100:
 975                         cdr.Stat = Complete;
 976                         no_busy_error = 1;
 977                         break;
 978
 979                 case CdlReadN:
 980                 case CdlReadS:
 981                         if (cdr.SetlocPending) {
 982                                 seekTime = abs(msf2sec(cdr.SetSectorPlay) - msf2sec(cdr.SetSector)) * (cdReadTime / 200);
 983                                 /*
 984                                 * Gameblabla :
 985                                 * It was originally set to 1000000 for Driver, however it is not high enough for Worms Pinball
 986                                 * and was unreliable for that game.
 987                                 * I also tested it against Mednafen and Driver's titlescreen music starts 25 frames later, not immediatly.
 988                                 *
 989                                 * Obviously, this isn't perfect but right now, it should be a bit better.
 990                                 * Games to test this against if you change that setting :
 991                                 * - Driver (titlescreen music delay and retry mission)
 992                                 * - Worms Pinball (Will either not boot or crash in the memory card screen)
 993                                 * - Viewpoint (short pauses if the delay in the ingame music is too long)
 994                                 *
 995                                 * It seems that 3386880 * 5 is too much for Driver's titlescreen and it starts skipping.
 996                                 * However, 1000000 is not enough for Worms Pinball to reliably boot.
 997                                 */
 998                                 if(seekTime > 3386880 * 2) seekTime = 3386880 * 2;
 999                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
1000                                 cdr.SetlocPending = 0;
1001                                 cdr.m_locationChanged = TRUE;
1002                         }
1003                         Find_CurTrack(cdr.SetSectorPlay);
1004
1005                         if ((cdr.Mode & MODE_CDDA) && cdr.CurTrack > 1)
1006                                 // Read* acts as play for cdda tracks in cdda mode
1007                                 goto do_CdlPlay;
1008
1009                         cdr.Reading = 1;
1010                         cdr.FirstSector = 1;
1011
1012                         // Fighting Force 2 - update subq time immediately
1013                         // - fixes new game
1014                         ReadTrack(cdr.SetSectorPlay);
1015
1016
1017                         // Crusaders of Might and Magic - update getlocl now
1018                         // - fixes cutscene speech
1019                         {
1020                                 u8 *buf = CDR_getBuffer();
1021                                 if (buf != NULL)
1022                                         memcpy(cdr.Transfer, buf, 8);
1023                         }
1024
1025                         /*
1026                         Duke Nukem: Land of the Babes - seek then delay read for one frame
1027                         - fixes cutscenes
1028                         C-12 - Final Resistance - doesn't like seek
1029                         */
1030
1031                         /*
1032                                 By nicolasnoble from PCSX Redux :
1033                                 "It LOOKS like this logic is wrong, therefore disabling it with `&& false` for now.
1034                                 For "PoPoLoCrois Monogatari II", the game logic will soft lock and will never issue GetLocP to detect
1035                                 the end of its XA streams, as it seems to assume ReadS will not return a status byte with the SEEK
1036                                 flag set. I think the reasonning is that since it's invalid to call GetLocP while seeking, the game
1037                                 tries to protect itself against errors by preventing from issuing a GetLocP while it knows the
1038                                 last status was "seek". But this makes the logic just softlock as it'll never get a notification
1039                                 about the fact the drive is done seeking and the read actually started.
1040
1041                                 In other words, this state machine here is probably wrong in assuming the response to ReadS/ReadN is
1042                                 done right away. It's rather when it's done seeking, and the read has actually started. This probably
1043                                 requires a bit more work to make sure seek delays are processed properly.
1044                                 Checked with a few games, this seems to work fine."
1045
1046                                 Gameblabla additional notes :
1047                                 This still needs the "+ seekTime" that PCSX Redux doesn't have for the Driver "retry" mission error.
1048                         */
1049                         cdr.StatP |= STATUS_READ;
1050                         cdr.StatP &= ~STATUS_SEEK;
1051
1052                         CDREAD_INT(((cdr.Mode & 0x80) ? (cdReadTime) : cdReadTime * 2) + seekTime);
1053
1054                         cdr.Result[0] = cdr.StatP;
1055                         start_rotating = 1;
1056                         break;
1057                 case CdlSync:
1058                 default:
1059                         CDR_LOG_I("Invalid command: %02x\n", Irq);
1060                         error = ERROR_INVALIDCMD;
1061                         // FALLTHROUGH
1062
1063                 set_error:
1064                         SetResultSize(2);
1065                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1066                         cdr.Result[1] = error;
1067                         cdr.Stat = DiskError;
1068                         break;
1069         }
1070
1071         if (cdr.DriveState == DRIVESTATE_STOPPED && start_rotating) {
1072                 cdr.DriveState = DRIVESTATE_STANDBY;
1073                 cdr.StatP |= STATUS_ROTATING;
1074         }
1075
1076         if (!no_busy_error) {
1077                 switch (cdr.DriveState) {
1078                 case DRIVESTATE_LID_OPEN:
1079                 case DRIVESTATE_RESCAN_CD:
1080                 case DRIVESTATE_PREPARE_CD:
1081                         SetResultSize(2);
1082                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1083                         cdr.Result[1] = ERROR_NOTREADY;
1084                         cdr.Stat = DiskError;
1085                         break;
1086                 }
1087         }
1088
1089 finish:
1090         setIrq();
1091         cdr.ParamC = 0;
1092
1093 #ifdef CDR_LOG_CMD_IRQ
1094         {
1095                 int i;
1096                 SysPrintf("CDR IRQ %d cmd %02x stat %02x: ",
1097                         !!(cdr.Stat & cdr.Reg2), Irq, cdr.Stat);
1098                 for (i = 0; i < cdr.ResultC; i++)
1099                         SysPrintf("%02x ", cdr.Result[i]);
1100                 SysPrintf("\n");
1101         }
1102 #endif
1103 }
1104
1105 #ifdef HAVE_ARMV7
1106  #define ssat32_to_16(v) \
1107   asm("ssat %0,#16,%1" : "=r" (v) : "r" (v))
1108 #else
1109  #define ssat32_to_16(v) do { \
1110   if (v < -32768) v = -32768; \
1111   else if (v > 32767) v = 32767; \
1112  } while (0)
1113 #endif
1114
1115 void cdrAttenuate(s16 *buf, int samples, int stereo)
1116 {
1117         int i, l, r;
1118         int ll = cdr.AttenuatorLeftToLeft;
1119         int lr = cdr.AttenuatorLeftToRight;
1120         int rl = cdr.AttenuatorRightToLeft;
1121         int rr = cdr.AttenuatorRightToRight;
1122
1123         if (lr == 0 && rl == 0 && 0x78 <= ll && ll <= 0x88 && 0x78 <= rr && rr <= 0x88)
1124                 return;
1125
1126         if (!stereo && ll == 0x40 && lr == 0x40 && rl == 0x40 && rr == 0x40)
1127                 return;
1128
1129         if (stereo) {
1130                 for (i = 0; i < samples; i++) {
1131                         l = buf[i * 2];
1132                         r = buf[i * 2 + 1];
1133                         l = (l * ll + r * rl) >> 7;
1134                         r = (r * rr + l * lr) >> 7;
1135                         ssat32_to_16(l);
1136                         ssat32_to_16(r);
1137                         buf[i * 2] = l;
1138                         buf[i * 2 + 1] = r;
1139                 }
1140         }
1141         else {
1142                 for (i = 0; i < samples; i++) {
1143                         l = buf[i];
1144                         l = l * (ll + rl) >> 7;
1145                         //r = r * (rr + lr) >> 7;
1146                         ssat32_to_16(l);
1147                         //ssat32_to_16(r);
1148                         buf[i] = l;
1149                 }
1150         }
1151 }
1152
1153 void cdrReadInterrupt() {
1154         u8 *buf;
1155
1156         if (!cdr.Reading)
1157                 return;
1158
1159         if (cdr.Irq || cdr.Stat) {
1160                 CDR_LOG_I("cdrom: read stat hack %02x %x\n", cdr.Irq, cdr.Stat);
1161                 CDREAD_INT(0x1000);
1162                 return;
1163         }
1164
1165         cdr.OCUP = 1;
1166         SetResultSize(1);
1167         cdr.StatP |= STATUS_READ|STATUS_ROTATING;
1168         cdr.StatP &= ~STATUS_SEEK;
1169         cdr.Result[0] = cdr.StatP;
1170         cdr.Seeked = SEEK_DONE;
1171
1172         ReadTrack(cdr.SetSectorPlay);
1173
1174         buf = CDR_getBuffer();
1175         if (buf == NULL)
1176                 cdr.NoErr = 0;
1177
1178         if (!cdr.NoErr) {
1179                 CDR_LOG_I("cdrReadInterrupt() Log: err\n");
1180                 memset(cdr.Transfer, 0, DATA_SIZE);
1181                 cdr.Stat = DiskError;
1182                 cdr.Result[0] |= STATUS_ERROR;
1183                 CDREAD_INT((cdr.Mode & 0x80) ? (cdReadTime / 2) : cdReadTime);
1184                 return;
1185         }
1186
1187         memcpy(cdr.Transfer, buf, DATA_SIZE);
1188         CheckPPFCache(cdr.Transfer, cdr.Prev[0], cdr.Prev[1], cdr.Prev[2]);
1189
1190
1191         CDR_LOG("cdrReadInterrupt() Log: cdr.Transfer %x:%x:%x\n", cdr.Transfer[0], cdr.Transfer[1], cdr.Transfer[2]);
1192
1193         if ((!cdr.Muted) && (cdr.Mode & MODE_STRSND) && (!Config.Xa) && (cdr.FirstSector != -1)) { // CD-XA
1194                 // Firemen 2: Multi-XA files - briefings, cutscenes
1195                 if( cdr.FirstSector == 1 && (cdr.Mode & MODE_SF)==0 ) {
1196                         cdr.File = cdr.Transfer[4 + 0];
1197                         cdr.Channel = cdr.Transfer[4 + 1];
1198                 }
1199
1200                 /* Gameblabla
1201                  * Skips playing on channel 255.
1202                  * Fixes missing audio in Blue's Clues : Blue's Big Musical. (Should also fix Taxi 2)
1203                  * TODO : Check if this is the proper behaviour.
1204                  * */
1205                 if((cdr.Transfer[4 + 2] & 0x4) &&
1206                          (cdr.Transfer[4 + 1] == cdr.Channel) &&
1207                          (cdr.Transfer[4 + 0] == cdr.File) && cdr.Channel != 255) {
1208                         int ret = xa_decode_sector(&cdr.Xa, cdr.Transfer+4, cdr.FirstSector);
1209                         if (!ret) {
1210                                 cdrAttenuate(cdr.Xa.pcm, cdr.Xa.nsamples, cdr.Xa.stereo);
1211                                 /*
1212                                  * Gameblabla -
1213                                  * This is a hack for Megaman X4, Castlevania etc...
1214                                  * that regressed from the new m_locationChanged and CDROM timings changes.
1215                                  * It is mostly noticeable in Castevania however and the stuttering can be very jarring.
1216                                  *
1217                                  * According to PCSX redux authors, we shouldn't cause a location change if
1218                                  * the sector difference is too small.
1219                                  * I attempted to go with that approach but came empty handed.
1220                                  * So for now, let's just set cdr.m_locationChanged to false when playing back any ADPCM samples.
1221                                  * This does not regress Crash Team Racing's intro at least.
1222                                 */
1223                                 cdr.m_locationChanged = FALSE;
1224                                 SPU_playADPCMchannel(&cdr.Xa);
1225                                 cdr.FirstSector = 0;
1226                         }
1227                         else cdr.FirstSector = -1;
1228                 }
1229         }
1230
1231         cdr.SetSectorPlay[2]++;
1232         if (cdr.SetSectorPlay[2] == 75) {
1233                 cdr.SetSectorPlay[2] = 0;
1234                 cdr.SetSectorPlay[1]++;
1235                 if (cdr.SetSectorPlay[1] == 60) {
1236                         cdr.SetSectorPlay[1] = 0;
1237                         cdr.SetSectorPlay[0]++;
1238                 }
1239         }
1240
1241         cdr.Readed = 0;
1242
1243         uint32_t delay = (cdr.Mode & MODE_SPEED) ? (cdReadTime / 2) : cdReadTime;
1244         if (cdr.m_locationChanged) {
1245                 CDREAD_INT(delay * 30);
1246                 cdr.m_locationChanged = FALSE;
1247         } else {
1248                 CDREAD_INT(delay);
1249         }
1250
1251         /*
1252         Croc 2: $40 - only FORM1 (*)
1253         Judge Dredd: $C8 - only FORM1 (*)
1254         Sim Theme Park - no adpcm at all (zero)
1255         */
1256
1257         if (!(cdr.Mode & MODE_STRSND) || !(cdr.Transfer[4+2] & 0x4)) {
1258                 cdr.Stat = DataReady;
1259                 setIrq();
1260         }
1261
1262         // update for CdlGetlocP
1263         ReadTrack(cdr.SetSectorPlay);
1264 }
1265
1266 /*
1267 cdrRead0:
1268         bit 0,1 - mode
1269         bit 2 - unknown
1270         bit 3 - unknown
1271         bit 4 - unknown
1272         bit 5 - 1 result ready
1273         bit 6 - 1 dma ready
1274         bit 7 - 1 command being processed
1275 */
1276
1277 unsigned char cdrRead0(void) {
1278         if (cdr.ResultReady)
1279                 cdr.Ctrl |= 0x20;
1280         else
1281                 cdr.Ctrl &= ~0x20;
1282
1283         if (cdr.OCUP)
1284                 cdr.Ctrl |= 0x40;
1285 //  else
1286 //              cdr.Ctrl &= ~0x40;
1287
1288         // What means the 0x10 and the 0x08 bits? I only saw it used by the bios
1289         cdr.Ctrl |= 0x18;
1290
1291         CDR_LOG_IO("cdr r0: %02x\n", cdr.Ctrl);
1292
1293         return psxHu8(0x1800) = cdr.Ctrl;
1294 }
1295
1296 void cdrWrite0(unsigned char rt) {
1297         CDR_LOG_IO("cdr w0: %02x\n", rt);
1298
1299         cdr.Ctrl = (rt & 3) | (cdr.Ctrl & ~3);
1300 }
1301
1302 unsigned char cdrRead1(void) {
1303         if ((cdr.ResultP & 0xf) < cdr.ResultC)
1304                 psxHu8(0x1801) = cdr.Result[cdr.ResultP & 0xf];
1305         else
1306                 psxHu8(0x1801) = 0;
1307         cdr.ResultP++;
1308         if (cdr.ResultP == cdr.ResultC)
1309                 cdr.ResultReady = 0;
1310
1311         CDR_LOG_IO("cdr r1: %02x\n", psxHu8(0x1801));
1312
1313         return psxHu8(0x1801);
1314 }
1315
1316 void cdrWrite1(unsigned char rt) {
1317         CDR_LOG_IO("cdr w1: %02x\n", rt);
1318
1319         switch (cdr.Ctrl & 3) {
1320         case 0:
1321                 break;
1322         case 3:
1323                 cdr.AttenuatorRightToRightT = rt;
1324                 return;
1325         default:
1326                 return;
1327         }
1328
1329         cdr.Cmd = rt;
1330         cdr.OCUP = 0;
1331
1332 #ifdef CDR_LOG_CMD_IRQ
1333         SysPrintf("CD1 write: %x (%s)", rt, CmdName[rt]);
1334         if (cdr.ParamC) {
1335                 SysPrintf(" Param[%d] = {", cdr.ParamC);
1336                 for (i = 0; i < cdr.ParamC; i++)
1337                         SysPrintf(" %x,", cdr.Param[i]);
1338                 SysPrintf("}\n");
1339         } else {
1340                 SysPrintf("\n");
1341         }
1342 #endif
1343
1344         cdr.ResultReady = 0;
1345         cdr.Ctrl |= 0x80;
1346         // cdr.Stat = NoIntr;
1347         AddIrqQueue(cdr.Cmd, 0x800);
1348
1349         switch (cdr.Cmd) {
1350
1351         case CdlReadN:
1352         case CdlReadS:
1353         case CdlPause:
1354                 StopCdda();
1355                 StopReading();
1356                 break;
1357
1358         case CdlInit:
1359         case CdlReset:
1360                 cdr.Seeked = SEEK_DONE;
1361                 StopCdda();
1362                 StopReading();
1363                 break;
1364
1365         case CdlSetmode:
1366                 CDR_LOG("cdrWrite1() Log: Setmode %x\n", cdr.Param[0]);
1367
1368                 cdr.Mode = cdr.Param[0];
1369
1370                 // Squaresoft on PlayStation 1998 Collector's CD Vol. 1
1371                 // - fixes choppy movie sound
1372                 if( cdr.Play && (cdr.Mode & MODE_CDDA) == 0 )
1373                         StopCdda();
1374                 break;
1375         }
1376 }
1377
1378 unsigned char cdrRead2(void) {
1379         unsigned char ret;
1380
1381         if (cdr.Readed == 0) {
1382                 ret = 0;
1383         } else {
1384                 ret = *pTransfer++;
1385         }
1386
1387         CDR_LOG_IO("cdr r2: %02x\n", ret);
1388         return ret;
1389 }
1390
1391 void cdrWrite2(unsigned char rt) {
1392         CDR_LOG_IO("cdr w2: %02x\n", rt);
1393
1394         switch (cdr.Ctrl & 3) {
1395         case 0:
1396                 if (cdr.ParamC < 8) // FIXME: size and wrapping
1397                         cdr.Param[cdr.ParamC++] = rt;
1398                 return;
1399         case 1:
1400                 cdr.Reg2 = rt;
1401                 setIrq();
1402                 return;
1403         case 2:
1404                 cdr.AttenuatorLeftToLeftT = rt;
1405                 return;
1406         case 3:
1407                 cdr.AttenuatorRightToLeftT = rt;
1408                 return;
1409         }
1410 }
1411
1412 unsigned char cdrRead3(void) {
1413         if (cdr.Ctrl & 0x1)
1414                 psxHu8(0x1803) = cdr.Stat | 0xE0;
1415         else
1416                 psxHu8(0x1803) = cdr.Reg2 | 0xE0;
1417
1418         CDR_LOG_IO("cdr r3: %02x\n", psxHu8(0x1803));
1419         return psxHu8(0x1803);
1420 }
1421
1422 void cdrWrite3(unsigned char rt) {
1423         CDR_LOG_IO("cdr w3: %02x\n", rt);
1424
1425         switch (cdr.Ctrl & 3) {
1426         case 0:
1427                 break; // transfer
1428         case 1:
1429                 cdr.Stat &= ~rt;
1430
1431                 if (rt & 0x40)
1432                         cdr.ParamC = 0;
1433                 return;
1434         case 2:
1435                 cdr.AttenuatorLeftToRightT = rt;
1436                 return;
1437         case 3:
1438                 if (rt & 0x20) {
1439                         memcpy(&cdr.AttenuatorLeftToLeft, &cdr.AttenuatorLeftToLeftT, 4);
1440                         CDR_LOG_I("CD-XA Volume: %02x %02x | %02x %02x\n",
1441                                 cdr.AttenuatorLeftToLeft, cdr.AttenuatorLeftToRight,
1442                                 cdr.AttenuatorRightToLeft, cdr.AttenuatorRightToRight);
1443                 }
1444                 return;
1445         }
1446
1447         if ((rt & 0x80) && cdr.Readed == 0) {
1448                 cdr.Readed = 1;
1449                 pTransfer = cdr.Transfer;
1450
1451                 switch (cdr.Mode & 0x30) {
1452                         case MODE_SIZE_2328:
1453                         case 0x00:
1454                                 pTransfer += 12;
1455                                 break;
1456
1457                         case MODE_SIZE_2340:
1458                                 pTransfer += 0;
1459                                 break;
1460
1461                         default:
1462                                 break;
1463                 }
1464         }
1465 }
1466
1467 void psxDma3(u32 madr, u32 bcr, u32 chcr) {
1468         u32 cdsize;
1469         int size;
1470         u8 *ptr;
1471
1472         CDR_LOG("psxDma3() Log: *** DMA 3 *** %x addr = %x size = %x\n", chcr, madr, bcr);
1473
1474         switch (chcr) {
1475                 case 0x11000000:
1476                 case 0x11400100:
1477                         if (cdr.Readed == 0) {
1478                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NOT READY\n");
1479                                 break;
1480                         }
1481
1482                         cdsize = (bcr & 0xffff) * 4;
1483
1484                         // Ape Escape: bcr = 0001 / 0000
1485                         // - fix boot
1486                         if( cdsize == 0 )
1487                         {
1488                                 switch (cdr.Mode & (MODE_SIZE_2340|MODE_SIZE_2328)) {
1489                                         case MODE_SIZE_2340: cdsize = 2340; break;
1490                                         case MODE_SIZE_2328: cdsize = 2328; break;
1491                                         default:
1492                                         case MODE_SIZE_2048: cdsize = 2048; break;
1493                                 }
1494                         }
1495
1496
1497                         ptr = (u8 *)PSXM(madr);
1498                         if (ptr == NULL) {
1499                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NULL Pointer!\n");
1500                                 break;
1501                         }
1502
1503                         /*
1504                         GS CDX: Enhancement CD crash
1505                         - Setloc 0:0:0
1506                         - CdlPlay
1507                         - Spams DMA3 and gets buffer overrun
1508                         */
1509                         size = CD_FRAMESIZE_RAW - (pTransfer - cdr.Transfer);
1510                         if (size > cdsize)
1511                                 size = cdsize;
1512                         if (size > 0)
1513                         {
1514                                 memcpy(ptr, pTransfer, size);
1515                         }
1516
1517                         psxCpu->Clear(madr, cdsize / 4);
1518                         pTransfer += cdsize;
1519
1520                         if( chcr == 0x11400100 ) {
1521                                 HW_DMA3_MADR = SWAPu32(madr + cdsize);
1522                                 CDRDMA_INT( (cdsize/4) / 4 );
1523                         }
1524                         else if( chcr == 0x11000000 ) {
1525                                 // CDRDMA_INT( (cdsize/4) * 1 );
1526                                 // halted
1527                                 psxRegs.cycle += (cdsize/4) * 24/2;
1528                                 CDRDMA_INT(16);
1529                         }
1530                         return;
1531
1532                 default:
1533                         CDR_LOG("psxDma3() Log: Unknown cddma %x\n", chcr);
1534                         break;
1535         }
1536
1537         HW_DMA3_CHCR &= SWAP32(~0x01000000);
1538         DMA_INTERRUPT(3);
1539 }
1540
1541 void cdrDmaInterrupt()
1542 {
1543         if (HW_DMA3_CHCR & SWAP32(0x01000000))
1544         {
1545                 HW_DMA3_CHCR &= SWAP32(~0x01000000);
1546                 DMA_INTERRUPT(3);
1547         }
1548 }
1549
1550 static void getCdInfo(void)
1551 {
1552         u8 tmp;
1553
1554         CDR_getTN(cdr.ResultTN);
1555         CDR_getTD(0, cdr.SetSectorEnd);
1556         tmp = cdr.SetSectorEnd[0];
1557         cdr.SetSectorEnd[0] = cdr.SetSectorEnd[2];
1558         cdr.SetSectorEnd[2] = tmp;
1559 }
1560
1561 void cdrReset() {
1562         memset(&cdr, 0, sizeof(cdr));
1563         cdr.CurTrack = 1;
1564         cdr.File = 1;
1565         cdr.Channel = 1;
1566         cdr.Reg2 = 0x1f;
1567         cdr.Stat = NoIntr;
1568         cdr.DriveState = DRIVESTATE_STANDBY;
1569         cdr.StatP = STATUS_ROTATING;
1570         pTransfer = cdr.Transfer;
1571
1572         // BIOS player - default values
1573         cdr.AttenuatorLeftToLeft = 0x80;
1574         cdr.AttenuatorLeftToRight = 0x00;
1575         cdr.AttenuatorRightToLeft = 0x00;
1576         cdr.AttenuatorRightToRight = 0x80;
1577
1578         getCdInfo();
1579 }
1580
1581 int cdrFreeze(void *f, int Mode) {
1582         u32 tmp;
1583         u8 tmpp[3];
1584
1585         if (Mode == 0 && !Config.Cdda)
1586                 CDR_stop();
1587
1588         cdr.freeze_ver = 0x63647202;
1589         gzfreeze(&cdr, sizeof(cdr));
1590
1591         if (Mode == 1) {
1592                 cdr.ParamP = cdr.ParamC;
1593                 tmp = pTransfer - cdr.Transfer;
1594         }
1595
1596         gzfreeze(&tmp, sizeof(tmp));
1597
1598         if (Mode == 0) {
1599                 getCdInfo();
1600
1601                 pTransfer = cdr.Transfer + tmp;
1602
1603                 // read right sub data
1604                 tmpp[0] = btoi(cdr.Prev[0]);
1605                 tmpp[1] = btoi(cdr.Prev[1]);
1606                 tmpp[2] = btoi(cdr.Prev[2]);
1607                 cdr.Prev[0]++;
1608                 ReadTrack(tmpp);
1609
1610                 if (cdr.Play) {
1611                         if (cdr.freeze_ver < 0x63647202)
1612                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 3);
1613
1614                         Find_CurTrack(cdr.SetSectorPlay);
1615                         if (!Config.Cdda)
1616                                 CDR_play(cdr.SetSectorPlay);
1617                 }
1618
1619                 if ((cdr.freeze_ver & 0xffffff00) != 0x63647200) {
1620                         // old versions did not latch Reg2, have to fixup..
1621                         if (cdr.Reg2 == 0) {
1622                                 SysPrintf("cdrom: fixing up old savestate\n");
1623                                 cdr.Reg2 = 7;
1624                         }
1625                         // also did not save Attenuator..
1626                         if ((cdr.AttenuatorLeftToLeft | cdr.AttenuatorLeftToRight
1627                              | cdr.AttenuatorRightToLeft | cdr.AttenuatorRightToRight) == 0)
1628                         {
1629                                 cdr.AttenuatorLeftToLeft = cdr.AttenuatorRightToRight = 0x80;
1630                         }
1631                 }
1632         }
1633
1634         return 0;
1635 }
1636
1637 void LidInterrupt() {
1638         getCdInfo();
1639         StopCdda();
1640         cdrLidSeekInterrupt();
1641 }