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();
 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                         // GameShark CD Player: Calls 2x + Play 2x
 709                         cdr.FastForward = 1;
 710                         cdr.FastBackward = 0;
 711                         break;
 712
 713                 case CdlBackward:
 714                         cdr.Stat = Complete;
 715
 716                         // GameShark CD Player: Calls 2x + Play 2x
 717                         cdr.FastBackward =1;
 718                         cdr.FastForward = 0;
 719                         break;
 720
 721                 case CdlStandby:
 722                         if (cdr.DriveState != DRIVESTATE_STOPPED) {
 723                                 error = ERROR_INVALIDARG;
 724                                 goto set_error;
 725                         }
 726                         AddIrqQueue(CdlStandby + 0x100, cdReadTime * 125 / 2);
 727                         start_rotating = 1;
 728                         break;
 729
 730                 case CdlStandby + 0x100:
 731                         cdr.Stat = Complete;
 732                         break;
 733
 734                 case CdlStop:
 735                         if (cdr.Play) {
 736                                 // grab time for current track
 737                                 CDR_getTD((u8)(cdr.CurTrack), cdr.ResultTD);
 738
 739                                 cdr.SetSectorPlay[0] = cdr.ResultTD[2];
 740                                 cdr.SetSectorPlay[1] = cdr.ResultTD[1];
 741                                 cdr.SetSectorPlay[2] = cdr.ResultTD[0];
 742                         }
 743
 744                         StopCdda();
 745                         StopReading();
 746
 747                         delay = 0x800;
 748                         if (cdr.DriveState == DRIVESTATE_STANDBY)
 749                                 delay = cdReadTime * 30 / 2;
 750
 751                         cdr.DriveState = DRIVESTATE_STOPPED;
 752                         AddIrqQueue(CdlStop + 0x100, delay);
 753                         break;
 754
 755                 case CdlStop + 0x100:
 756                         cdr.StatP &= ~STATUS_ROTATING;
 757                         cdr.Result[0] = cdr.StatP;
 758                         cdr.Stat = Complete;
 759                         break;
 760
 761                 case CdlPause:
 762                         /*
 763                         Gundam Battle Assault 2: much slower (*)
 764                         - Fixes boot, gameplay
 765                         Hokuto no Ken 2: slower
 766                         - Fixes intro + subtitles
 767                         InuYasha - Feudal Fairy Tale: slower
 768                         - Fixes battles
 769                         */
 770                         /* Gameblabla - Tightening the timings (as taken from Duckstation).
 771                          * The timings from Duckstation are based upon hardware tests.
 772                          * Mednafen's timing don't work for Gundam Battle Assault 2 in PAL/50hz mode,
 773                          * seems to be timing sensitive as it can depend on the CPU's clock speed.
 774                          *
 775                          * We will need to get around this for Bedlam/Rise 2 later...
 776                          * */
 777                         if (cdr.DriveState != DRIVESTATE_STANDBY)
 778                         {
 779                                 delay = 7000;
 780                         }
 781                         else
 782                         {
 783                                 delay = (((cdr.Mode & MODE_SPEED) ? 2 : 1) * (1000000));
 784                                 CDRMISC_INT((cdr.Mode & MODE_SPEED) ? cdReadTime / 2 : cdReadTime);
 785                         }
 786                         AddIrqQueue(CdlPause + 0x100, delay);
 787                         cdr.Ctrl |= 0x80;
 788                         break;
 789
 790                 case CdlPause + 0x100:
 791                         cdr.StatP &= ~STATUS_READ;
 792                         cdr.Result[0] = cdr.StatP;
 793                         cdr.Stat = Complete;
 794                         break;
 795
 796                 case CdlReset:
 797                         cdr.Muted = FALSE;
 798                         cdr.Mode = 0x20; /* Needed for This is Football 2, Pooh's Party and possibly others. */
 799                         AddIrqQueue(CdlReset + 0x100, 4100000);
 800                         no_busy_error = 1;
 801                         start_rotating = 1;
 802                         break;
 803
 804                 case CdlReset + 0x100:
 805                         cdr.Stat = Complete;
 806                         break;
 807
 808                 case CdlMute:
 809                         cdr.Muted = TRUE;
 810                         break;
 811
 812                 case CdlDemute:
 813                         cdr.Muted = FALSE;
 814                         break;
 815
 816                 case CdlSetfilter:
 817                         cdr.File = cdr.Param[0];
 818                         cdr.Channel = cdr.Param[1];
 819                         break;
 820
 821                 case CdlSetmode:
 822                         no_busy_error = 1;
 823                         break;
 824
 825                 case CdlGetparam:
 826                         SetResultSize(5);
 827                         cdr.Result[1] = cdr.Mode;
 828                         cdr.Result[2] = 0;
 829                         cdr.Result[3] = cdr.File;
 830                         cdr.Result[4] = cdr.Channel;
 831                         no_busy_error = 1;
 832                         break;
 833
 834                 case CdlGetlocL:
 835                         SetResultSize(8);
 836                         memcpy(cdr.Result, cdr.Transfer, 8);
 837                         break;
 838
 839                 case CdlGetlocP:
 840                         SetResultSize(8);
 841                         memcpy(&cdr.Result, &cdr.subq, 8);
 842
 843                         if (!cdr.Play && !cdr.Reading)
 844                                 cdr.Result[1] = 0; // HACK?
 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                         /* This adds the string "PCSX" in Playstation bios boot screen */
 952                         memcpy((char *)&cdr.Result[4], "PCSX", 4);
 953                         cdr.Stat = Complete;
 954                         break;
 955
 956                 case CdlInit:
 957                         // yes, it really sets STATUS_SHELLOPEN
 958                         cdr.StatP |= STATUS_SHELLOPEN;
 959                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
 960                         CDRLID_INT(20480);
 961                         no_busy_error = 1;
 962                         start_rotating = 1;
 963                         break;
 964
 965                 case CdlGetQ:
 966                         no_busy_error = 1;
 967                         break;
 968
 969                 case CdlReadToc:
 970                         AddIrqQueue(CdlReadToc + 0x100, cdReadTime * 180 / 4);
 971                         no_busy_error = 1;
 972                         start_rotating = 1;
 973                         break;
 974
 975                 case CdlReadToc + 0x100:
 976                         cdr.Stat = Complete;
 977                         no_busy_error = 1;
 978                         break;
 979
 980                 case CdlReadN:
 981                 case CdlReadS:
 982                         if (cdr.SetlocPending) {
 983                                 seekTime = abs(msf2sec(cdr.SetSectorPlay) - msf2sec(cdr.SetSector)) * (cdReadTime / 200);
 984                                 /*
 985                                 * Gameblabla :
 986                                 * It was originally set to 1000000 for Driver, however it is not high enough for Worms Pinball
 987                                 * and was unreliable for that game.
 988                                 * I also tested it against Mednafen and Driver's titlescreen music starts 25 frames later, not immediatly.
 989                                 *
 990                                 * Obviously, this isn't perfect but right now, it should be a bit better.
 991                                 * Games to test this against if you change that setting :
 992                                 * - Driver (titlescreen music delay and retry mission)
 993                                 * - Worms Pinball (Will either not boot or crash in the memory card screen)
 994                                 * - Viewpoint (short pauses if the delay in the ingame music is too long)
 995                                 *
 996                                 * It seems that 3386880 * 5 is too much for Driver's titlescreen and it starts skipping.
 997                                 * However, 1000000 is not enough for Worms Pinball to reliably boot.
 998                                 */
 999                                 if(seekTime > 3386880 * 2) seekTime = 3386880 * 2;
1000                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
1001                                 cdr.SetlocPending = 0;
1002                                 cdr.m_locationChanged = TRUE;
1003                         }
1004                         Find_CurTrack(cdr.SetSectorPlay);
1005
1006                         if ((cdr.Mode & MODE_CDDA) && cdr.CurTrack > 1)
1007                                 // Read* acts as play for cdda tracks in cdda mode
1008                                 goto do_CdlPlay;
1009
1010                         cdr.Reading = 1;
1011                         cdr.FirstSector = 1;
1012
1013                         // Fighting Force 2 - update subq time immediately
1014                         // - fixes new game
1015                         ReadTrack(cdr.SetSectorPlay);
1016
1017
1018                         // Crusaders of Might and Magic - update getlocl now
1019                         // - fixes cutscene speech
1020                         {
1021                                 u8 *buf = CDR_getBuffer();
1022                                 if (buf != NULL)
1023                                         memcpy(cdr.Transfer, buf, 8);
1024                         }
1025
1026                         /*
1027                         Duke Nukem: Land of the Babes - seek then delay read for one frame
1028                         - fixes cutscenes
1029                         C-12 - Final Resistance - doesn't like seek
1030                         */
1031
1032                         /*
1033                                 By nicolasnoble from PCSX Redux :
1034                                 "It LOOKS like this logic is wrong, therefore disabling it with `&& false` for now.
1035                                 For "PoPoLoCrois Monogatari II", the game logic will soft lock and will never issue GetLocP to detect
1036                                 the end of its XA streams, as it seems to assume ReadS will not return a status byte with the SEEK
1037                                 flag set. I think the reasonning is that since it's invalid to call GetLocP while seeking, the game
1038                                 tries to protect itself against errors by preventing from issuing a GetLocP while it knows the
1039                                 last status was "seek". But this makes the logic just softlock as it'll never get a notification
1040                                 about the fact the drive is done seeking and the read actually started.
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                         CDREAD_INT(((cdr.Mode & 0x80) ? (cdReadTime) : cdReadTime * 2) + seekTime);
1052
1053                         cdr.Result[0] = cdr.StatP;
1054                         start_rotating = 1;
1055                         break;
1056
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 == 0) {
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         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         cdr.SetlocPending = 0;
1571         cdr.m_locationChanged = FALSE;
1572
1573         // BIOS player - default values
1574         cdr.AttenuatorLeftToLeft = 0x80;
1575         cdr.AttenuatorLeftToRight = 0x00;
1576         cdr.AttenuatorRightToLeft = 0x00;
1577         cdr.AttenuatorRightToRight = 0x80;
1578
1579         getCdInfo();
1580 }
1581
1582 int cdrFreeze(void *f, int Mode) {
1583         u32 tmp;
1584         u8 tmpp[3];
1585
1586         if (Mode == 0 && !Config.Cdda)
1587                 CDR_stop();
1588
1589         cdr.freeze_ver = 0x63647202;
1590         gzfreeze(&cdr, sizeof(cdr));
1591
1592         if (Mode == 1) {
1593                 cdr.ParamP = cdr.ParamC;
1594                 tmp = pTransfer - cdr.Transfer;
1595         }
1596
1597         gzfreeze(&tmp, sizeof(tmp));
1598
1599         if (Mode == 0) {
1600                 getCdInfo();
1601
1602                 pTransfer = cdr.Transfer + tmp;
1603
1604                 // read right sub data
1605                 tmpp[0] = btoi(cdr.Prev[0]);
1606                 tmpp[1] = btoi(cdr.Prev[1]);
1607                 tmpp[2] = btoi(cdr.Prev[2]);
1608                 cdr.Prev[0]++;
1609                 ReadTrack(tmpp);
1610
1611                 if (cdr.Play) {
1612                         if (cdr.freeze_ver < 0x63647202)
1613                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 3);
1614
1615                         Find_CurTrack(cdr.SetSectorPlay);
1616                         if (!Config.Cdda)
1617                                 CDR_play();
1618                 }
1619
1620                 if ((cdr.freeze_ver & 0xffffff00) != 0x63647200) {
1621                         // old versions did not latch Reg2, have to fixup..
1622                         if (cdr.Reg2 == 0) {
1623                                 SysPrintf("cdrom: fixing up old savestate\n");
1624                                 cdr.Reg2 = 7;
1625                         }
1626                         // also did not save Attenuator..
1627                         if ((cdr.AttenuatorLeftToLeft | cdr.AttenuatorLeftToRight
1628                              | cdr.AttenuatorRightToLeft | cdr.AttenuatorRightToRight) == 0)
1629                         {
1630                                 cdr.AttenuatorLeftToLeft = cdr.AttenuatorRightToRight = 0x80;
1631                         }
1632                 }
1633         }
1634
1635         return 0;
1636 }
1637
1638 void LidInterrupt() {
1639         getCdInfo();
1640         StopCdda();
1641         cdrLidSeekInterrupt();
1642 }