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 static struct {
  48         unsigned char OCUP;
  49         unsigned char Reg1Mode;
  50         unsigned char Reg2;
  51         unsigned char CmdProcess;
  52         unsigned char Ctrl;
  53         unsigned char Stat;
  54
  55         unsigned char StatP;
  56
  57         unsigned char Transfer[DATA_SIZE];
  58         struct {
  59                 unsigned char Track;
  60                 unsigned char Index;
  61                 unsigned char Relative[3];
  62                 unsigned char Absolute[3];
  63         } subq;
  64         unsigned char TrackChanged;
  65         unsigned char pad1[3];
  66         unsigned int  freeze_ver;
  67
  68         unsigned char Prev[4];
  69         unsigned char Param[8];
  70         unsigned char Result[16];
  71
  72         unsigned char ParamC;
  73         unsigned char ParamP;
  74         unsigned char ResultC;
  75         unsigned char ResultP;
  76         unsigned char ResultReady;
  77         unsigned char Cmd;
  78         unsigned char Readed;
  79         unsigned char SetlocPending;
  80         u32 Reading;
  81
  82         unsigned char ResultTN[6];
  83         unsigned char ResultTD[4];
  84         unsigned char SetSectorPlay[4];
  85         unsigned char SetSectorEnd[4];
  86         unsigned char SetSector[4];
  87         unsigned char Track;
  88         boolean Play, Muted;
  89         int CurTrack;
  90         int Mode, File, Channel;
  91         int Reset;
  92         int NoErr;
  93         int FirstSector;
  94
  95         xa_decode_t Xa;
  96
  97         int Init;
  98
  99         u16 Irq;
 100         u8 IrqRepeated;
 101         u32 eCycle;
 102
 103         u8 pad2;
 104
 105         u8 DriveState;
 106         u8 FastForward;
 107         u8 FastBackward;
 108         u8 pad;
 109
 110         u8 AttenuatorLeftToLeft, AttenuatorLeftToRight;
 111         u8 AttenuatorRightToRight, AttenuatorRightToLeft;
 112         u8 AttenuatorLeftToLeftT, AttenuatorLeftToRightT;
 113         u8 AttenuatorRightToRightT, AttenuatorRightToLeftT;
 114 } cdr;
 115 static unsigned char *pTransfer;
 116 static s16 read_buf[CD_FRAMESIZE_RAW/2];
 117
 118 /* CD-ROM magic numbers */
 119 #define CdlSync        0  /* nocash documentation : "Uh, actually, returns error code 40h = Invalid Command...?" */
 120 #define CdlNop         1
 121 #define CdlSetloc      2
 122 #define CdlPlay        3
 123 #define CdlForward     4
 124 #define CdlBackward    5
 125 #define CdlReadN       6
 126 #define CdlStandby     7
 127 #define CdlStop        8
 128 #define CdlPause       9
 129 #define CdlReset       10
 130 #define CdlMute        11
 131 #define CdlDemute      12
 132 #define CdlSetfilter   13
 133 #define CdlSetmode     14
 134 #define CdlGetparam    15
 135 #define CdlGetlocL     16
 136 #define CdlGetlocP     17
 137 #define CdlReadT       18
 138 #define CdlGetTN       19
 139 #define CdlGetTD       20
 140 #define CdlSeekL       21
 141 #define CdlSeekP       22
 142 #define CdlSetclock    23
 143 #define CdlGetclock    24
 144 #define CdlTest        25
 145 #define CdlID          26
 146 #define CdlReadS       27
 147 #define CdlInit        28
 148 #define CdlGetQ        29
 149 #define CdlReadToc     30
 150
 151 #ifdef CDR_LOG_CMD_IRQ
 152 static const char * const CmdName[0x100] = {
 153     "CdlSync",     "CdlNop",       "CdlSetloc",  "CdlPlay",
 154     "CdlForward",  "CdlBackward",  "CdlReadN",   "CdlStandby",
 155     "CdlStop",     "CdlPause",     "CdlReset",    "CdlMute",
 156     "CdlDemute",   "CdlSetfilter", "CdlSetmode", "CdlGetparam",
 157     "CdlGetlocL",  "CdlGetlocP",   "CdlReadT",   "CdlGetTN",
 158     "CdlGetTD",    "CdlSeekL",     "CdlSeekP",   "CdlSetclock",
 159     "CdlGetclock", "CdlTest",      "CdlID",      "CdlReadS",
 160     "CdlInit",     NULL,           "CDlReadToc", NULL
 161 };
 162 #endif
 163
 164 unsigned char Test04[] = { 0 };
 165 unsigned char Test05[] = { 0 };
 166 unsigned char Test20[] = { 0x98, 0x06, 0x10, 0xC3 };
 167 unsigned char Test22[] = { 0x66, 0x6F, 0x72, 0x20, 0x45, 0x75, 0x72, 0x6F };
 168 unsigned char Test23[] = { 0x43, 0x58, 0x44, 0x32, 0x39 ,0x34, 0x30, 0x51 };
 169
 170 // cdr.Stat:
 171 #define NoIntr          0
 172 #define DataReady       1
 173 #define Complete        2
 174 #define Acknowledge     3
 175 #define DataEnd         4
 176 #define DiskError       5
 177
 178 /* Modes flags */
 179 #define MODE_SPEED       (1<<7) // 0x80
 180 #define MODE_STRSND      (1<<6) // 0x40 ADPCM on/off
 181 #define MODE_SIZE_2340   (1<<5) // 0x20
 182 #define MODE_SIZE_2328   (1<<4) // 0x10
 183 #define MODE_SIZE_2048   (0<<4) // 0x00
 184 #define MODE_SF          (1<<3) // 0x08 channel on/off
 185 #define MODE_REPORT      (1<<2) // 0x04
 186 #define MODE_AUTOPAUSE   (1<<1) // 0x02
 187 #define MODE_CDDA        (1<<0) // 0x01
 188
 189 /* Status flags */
 190 #define STATUS_PLAY      (1<<7) // 0x80
 191 #define STATUS_SEEK      (1<<6) // 0x40
 192 #define STATUS_READ      (1<<5) // 0x20
 193 #define STATUS_SHELLOPEN (1<<4) // 0x10
 194 #define STATUS_UNKNOWN3  (1<<3) // 0x08
 195 #define STATUS_UNKNOWN2  (1<<2) // 0x04
 196 #define STATUS_ROTATING  (1<<1) // 0x02
 197 #define STATUS_ERROR     (1<<0) // 0x01
 198
 199 /* Errors */
 200 #define ERROR_NOTREADY   (1<<7) // 0x80
 201 #define ERROR_INVALIDCMD (1<<6) // 0x40
 202 #define ERROR_INVALIDARG (1<<5) // 0x20
 203
 204 // 1x = 75 sectors per second
 205 // PSXCLK = 1 sec in the ps
 206 // so (PSXCLK / 75) = cdr read time (linuzappz)
 207 #define cdReadTime (PSXCLK / 75)
 208
 209 enum drive_state {
 210         DRIVESTATE_STANDBY = 0, // pause, play, read
 211         DRIVESTATE_LID_OPEN,
 212         DRIVESTATE_RESCAN_CD,
 213         DRIVESTATE_PREPARE_CD,
 214         DRIVESTATE_STOPPED,
 215 };
 216
 217 static struct CdrStat stat;
 218
 219 static unsigned int msf2sec(const u8 *msf) {
 220         return ((msf[0] * 60 + msf[1]) * 75) + msf[2];
 221 }
 222
 223 // for that weird psemu API..
 224 static unsigned int fsm2sec(const u8 *msf) {
 225         return ((msf[2] * 60 + msf[1]) * 75) + msf[0];
 226 }
 227
 228 static void sec2msf(unsigned int s, u8 *msf) {
 229         msf[0] = s / 75 / 60;
 230         s = s - msf[0] * 75 * 60;
 231         msf[1] = s / 75;
 232         s = s - msf[1] * 75;
 233         msf[2] = s;
 234 }
 235
 236 // cdrInterrupt
 237 #define CDR_INT(eCycle) { \
 238         psxRegs.interrupt |= (1 << PSXINT_CDR); \
 239         psxRegs.intCycle[PSXINT_CDR].cycle = eCycle; \
 240         psxRegs.intCycle[PSXINT_CDR].sCycle = psxRegs.cycle; \
 241         new_dyna_set_event(PSXINT_CDR, eCycle); \
 242 }
 243
 244 // cdrPlaySeekReadInterrupt
 245 #define CDRPLAYSEEKREAD_INT(eCycle) { \
 246         psxRegs.interrupt |= (1 << PSXINT_CDREAD); \
 247         psxRegs.intCycle[PSXINT_CDREAD].cycle = eCycle; \
 248         psxRegs.intCycle[PSXINT_CDREAD].sCycle = psxRegs.cycle; \
 249         new_dyna_set_event(PSXINT_CDREAD, eCycle); \
 250 }
 251
 252 // cdrLidSeekInterrupt
 253 #define CDRLID_INT(eCycle) { \
 254         psxRegs.interrupt |= (1 << PSXINT_CDRLID); \
 255         psxRegs.intCycle[PSXINT_CDRLID].cycle = eCycle; \
 256         psxRegs.intCycle[PSXINT_CDRLID].sCycle = psxRegs.cycle; \
 257         new_dyna_set_event(PSXINT_CDRLID, eCycle); \
 258 }
 259
 260 #define StopReading() { \
 261         cdr.Reading = 0; \
 262         psxRegs.interrupt &= ~(1 << PSXINT_CDREAD); \
 263 }
 264
 265 #define StopCdda() { \
 266         if (cdr.Play && !Config.Cdda) CDR_stop(); \
 267         cdr.Play = FALSE; \
 268         cdr.FastForward = 0; \
 269         cdr.FastBackward = 0; \
 270 }
 271
 272 #define SetPlaySeekRead(x, f) { \
 273         x &= ~(STATUS_PLAY | STATUS_SEEK | STATUS_READ); \
 274         x |= f; \
 275 }
 276
 277 #define SetResultSize(size) { \
 278         cdr.ResultP = 0; \
 279         cdr.ResultC = size; \
 280         cdr.ResultReady = 1; \
 281 }
 282
 283 static void setIrq(int log_cmd)
 284 {
 285         if (cdr.Stat & cdr.Reg2)
 286                 psxHu32ref(0x1070) |= SWAP32((u32)0x4);
 287
 288 #ifdef CDR_LOG_CMD_IRQ
 289         {
 290                 int i;
 291                 SysPrintf("CDR IRQ=%d cmd %02x stat %02x: ",
 292                         !!(cdr.Stat & cdr.Reg2), log_cmd, cdr.Stat);
 293                 for (i = 0; i < cdr.ResultC; i++)
 294                         SysPrintf("%02x ", cdr.Result[i]);
 295                 SysPrintf("\n");
 296         }
 297 #endif
 298 }
 299
 300 // timing used in this function was taken from tests on real hardware
 301 // (yes it's slow, but you probably don't want to modify it)
 302 void cdrLidSeekInterrupt(void)
 303 {
 304         switch (cdr.DriveState) {
 305         default:
 306         case DRIVESTATE_STANDBY:
 307                 StopCdda();
 308                 StopReading();
 309                 SetPlaySeekRead(cdr.StatP, 0);
 310
 311                 if (CDR_getStatus(&stat) == -1)
 312                         return;
 313
 314                 if (stat.Status & STATUS_SHELLOPEN)
 315                 {
 316                         cdr.DriveState = DRIVESTATE_LID_OPEN;
 317                         CDRLID_INT(0x800);
 318                 }
 319                 break;
 320
 321         case DRIVESTATE_LID_OPEN:
 322                 if (CDR_getStatus(&stat) == -1)
 323                         stat.Status &= ~STATUS_SHELLOPEN;
 324
 325                 // 02, 12, 10
 326                 if (!(cdr.StatP & STATUS_SHELLOPEN)) {
 327                         cdr.StatP |= STATUS_SHELLOPEN;
 328
 329                         // could generate error irq here, but real hardware
 330                         // only sometimes does that
 331                         // (not done when lots of commands are sent?)
 332
 333                         CDRLID_INT(cdReadTime * 30);
 334                         break;
 335                 }
 336                 else if (cdr.StatP & STATUS_ROTATING) {
 337                         cdr.StatP &= ~STATUS_ROTATING;
 338                 }
 339                 else if (!(stat.Status & STATUS_SHELLOPEN)) {
 340                         // closed now
 341                         CheckCdrom();
 342
 343                         // cdr.StatP STATUS_SHELLOPEN is "sticky"
 344                         // and is only cleared by CdlNop
 345
 346                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
 347                         CDRLID_INT(cdReadTime * 105);
 348                         break;
 349                 }
 350
 351                 // recheck for close
 352                 CDRLID_INT(cdReadTime * 3);
 353                 break;
 354
 355         case DRIVESTATE_RESCAN_CD:
 356                 cdr.StatP |= STATUS_ROTATING;
 357                 cdr.DriveState = DRIVESTATE_PREPARE_CD;
 358
 359                 // this is very long on real hardware, over 6 seconds
 360                 // make it a bit faster here...
 361                 CDRLID_INT(cdReadTime * 150);
 362                 break;
 363
 364         case DRIVESTATE_PREPARE_CD:
 365                 cdr.StatP |= STATUS_SEEK;
 366
 367                 cdr.DriveState = DRIVESTATE_STANDBY;
 368                 CDRLID_INT(cdReadTime * 26);
 369                 break;
 370         }
 371 }
 372
 373 static void Find_CurTrack(const u8 *time)
 374 {
 375         int current, sect;
 376
 377         current = msf2sec(time);
 378
 379         for (cdr.CurTrack = 1; cdr.CurTrack < cdr.ResultTN[1]; cdr.CurTrack++) {
 380                 CDR_getTD(cdr.CurTrack + 1, cdr.ResultTD);
 381                 sect = fsm2sec(cdr.ResultTD);
 382                 if (sect - current >= 150)
 383                         break;
 384         }
 385 }
 386
 387 static void generate_subq(const u8 *time)
 388 {
 389         unsigned char start[3], next[3];
 390         unsigned int this_s, start_s, next_s, pregap;
 391         int relative_s;
 392
 393         CDR_getTD(cdr.CurTrack, start);
 394         if (cdr.CurTrack + 1 <= cdr.ResultTN[1]) {
 395                 pregap = 150;
 396                 CDR_getTD(cdr.CurTrack + 1, next);
 397         }
 398         else {
 399                 // last track - cd size
 400                 pregap = 0;
 401                 next[0] = cdr.SetSectorEnd[2];
 402                 next[1] = cdr.SetSectorEnd[1];
 403                 next[2] = cdr.SetSectorEnd[0];
 404         }
 405
 406         this_s = msf2sec(time);
 407         start_s = fsm2sec(start);
 408         next_s = fsm2sec(next);
 409
 410         cdr.TrackChanged = FALSE;
 411
 412         if (next_s - this_s < pregap) {
 413                 cdr.TrackChanged = TRUE;
 414                 cdr.CurTrack++;
 415                 start_s = next_s;
 416         }
 417
 418         cdr.subq.Index = 1;
 419
 420         relative_s = this_s - start_s;
 421         if (relative_s < 0) {
 422                 cdr.subq.Index = 0;
 423                 relative_s = -relative_s;
 424         }
 425         sec2msf(relative_s, cdr.subq.Relative);
 426
 427         cdr.subq.Track = itob(cdr.CurTrack);
 428         cdr.subq.Relative[0] = itob(cdr.subq.Relative[0]);
 429         cdr.subq.Relative[1] = itob(cdr.subq.Relative[1]);
 430         cdr.subq.Relative[2] = itob(cdr.subq.Relative[2]);
 431         cdr.subq.Absolute[0] = itob(time[0]);
 432         cdr.subq.Absolute[1] = itob(time[1]);
 433         cdr.subq.Absolute[2] = itob(time[2]);
 434 }
 435
 436 static void ReadTrack(const u8 *time) {
 437         unsigned char tmp[3];
 438         struct SubQ *subq;
 439         u16 crc;
 440
 441         tmp[0] = itob(time[0]);
 442         tmp[1] = itob(time[1]);
 443         tmp[2] = itob(time[2]);
 444
 445         if (memcmp(cdr.Prev, tmp, 3) == 0)
 446                 return;
 447
 448         CDR_LOG("ReadTrack *** %02x:%02x:%02x\n", tmp[0], tmp[1], tmp[2]);
 449
 450         cdr.NoErr = CDR_readTrack(tmp);
 451         memcpy(cdr.Prev, tmp, 3);
 452
 453         if (CheckSBI(time))
 454                 return;
 455
 456         subq = (struct SubQ *)CDR_getBufferSub();
 457         if (subq != NULL && cdr.CurTrack == 1) {
 458                 crc = calcCrc((u8 *)subq + 12, 10);
 459                 if (crc == (((u16)subq->CRC[0] << 8) | subq->CRC[1])) {
 460                         cdr.subq.Track = subq->TrackNumber;
 461                         cdr.subq.Index = subq->IndexNumber;
 462                         memcpy(cdr.subq.Relative, subq->TrackRelativeAddress, 3);
 463                         memcpy(cdr.subq.Absolute, subq->AbsoluteAddress, 3);
 464                 }
 465                 else {
 466                         CDR_LOG_I("subq bad crc @%02x:%02x:%02x\n",
 467                                 tmp[0], tmp[1], tmp[2]);
 468                 }
 469         }
 470         else {
 471                 generate_subq(time);
 472         }
 473
 474         CDR_LOG(" -> %02x,%02x %02x:%02x:%02x %02x:%02x:%02x\n",
 475                 cdr.subq.Track, cdr.subq.Index,
 476                 cdr.subq.Relative[0], cdr.subq.Relative[1], cdr.subq.Relative[2],
 477                 cdr.subq.Absolute[0], cdr.subq.Absolute[1], cdr.subq.Absolute[2]);
 478 }
 479
 480 static void AddIrqQueue(unsigned short irq, unsigned long ecycle) {
 481         if (cdr.Irq != 0) {
 482                 if (irq == cdr.Irq || irq + 0x100 == cdr.Irq) {
 483                         cdr.IrqRepeated = 1;
 484                         CDR_INT(ecycle);
 485                         return;
 486                 }
 487
 488                 CDR_LOG_I("cdr: override cmd %02x -> %02x\n", cdr.Irq, irq);
 489         }
 490
 491         cdr.Irq = irq;
 492         cdr.eCycle = ecycle;
 493
 494         CDR_INT(ecycle);
 495 }
 496
 497 static void cdrPlayInterrupt_Autopause()
 498 {
 499         u32 abs_lev_max = 0;
 500         boolean abs_lev_chselect;
 501         u32 i;
 502
 503         if ((cdr.Mode & MODE_AUTOPAUSE) && cdr.TrackChanged) {
 504                 CDR_LOG( "CDDA STOP\n" );
 505
 506                 // Magic the Gathering
 507                 // - looping territory cdda
 508
 509                 // ...?
 510                 //cdr.ResultReady = 1;
 511                 //cdr.Stat = DataReady;
 512                 cdr.Stat = DataEnd;
 513                 setIrq(0x200);
 514
 515                 StopCdda();
 516                 SetPlaySeekRead(cdr.StatP, 0);
 517         }
 518         else if (((cdr.Mode & MODE_REPORT) || cdr.FastForward || cdr.FastBackward)) {
 519                 cdr.Result[0] = cdr.StatP;
 520                 cdr.Result[1] = cdr.subq.Track;
 521                 cdr.Result[2] = cdr.subq.Index;
 522
 523                 abs_lev_chselect = cdr.subq.Absolute[1] & 0x01;
 524
 525                 /* 8 is a hack. For accuracy, it should be 588. */
 526                 for (i = 0; i < 8; i++)
 527                 {
 528                         abs_lev_max = MAX_VALUE(abs_lev_max, abs(read_buf[i * 2 + abs_lev_chselect]));
 529                 }
 530                 abs_lev_max = MIN_VALUE(abs_lev_max, 32767);
 531                 abs_lev_max |= abs_lev_chselect << 15;
 532
 533                 if (cdr.subq.Absolute[2] & 0x10) {
 534                         cdr.Result[3] = cdr.subq.Relative[0];
 535                         cdr.Result[4] = cdr.subq.Relative[1] | 0x80;
 536                         cdr.Result[5] = cdr.subq.Relative[2];
 537                 }
 538                 else {
 539                         cdr.Result[3] = cdr.subq.Absolute[0];
 540                         cdr.Result[4] = cdr.subq.Absolute[1];
 541                         cdr.Result[5] = cdr.subq.Absolute[2];
 542                 }
 543
 544                 cdr.Result[6] = abs_lev_max >> 0;
 545                 cdr.Result[7] = abs_lev_max >> 8;
 546
 547                 // Rayman: Logo freeze (resultready + dataready)
 548                 cdr.ResultReady = 1;
 549                 cdr.Stat = DataReady;
 550
 551                 SetResultSize(8);
 552                 setIrq(0x201);
 553         }
 554 }
 555
 556 static int cdrSeekTime(unsigned char *target)
 557 {
 558         int seekTime = abs(msf2sec(cdr.SetSectorPlay) - msf2sec(target)) * (cdReadTime / 200);
 559         /*
 560         * Gameblabla :
 561         * It was originally set to 1000000 for Driver, however it is not high enough for Worms Pinball
 562         * and was unreliable for that game.
 563         * I also tested it against Mednafen and Driver's titlescreen music starts 25 frames later, not immediatly.
 564         *
 565         * Obviously, this isn't perfect but right now, it should be a bit better.
 566         * Games to test this against if you change that setting :
 567         * - Driver (titlescreen music delay and retry mission)
 568         * - Worms Pinball (Will either not boot or crash in the memory card screen)
 569         * - Viewpoint (short pauses if the delay in the ingame music is too long)
 570         *
 571         * It seems that 3386880 * 5 is too much for Driver's titlescreen and it starts skipping.
 572         * However, 1000000 is not enough for Worms Pinball to reliably boot.
 573         */
 574         if(seekTime > 3386880 * 2) seekTime = 3386880 * 2;
 575         CDR_LOG("seek: %.2f %.2f\n", (float)seekTime / PSXCLK, (float)seekTime / cdReadTime);
 576         return seekTime;
 577 }
 578
 579 static void cdrReadInterrupt(void);
 580
 581 void cdrPlaySeekReadInterrupt(void)
 582 {
 583         if (cdr.Reading) {
 584                 cdrReadInterrupt();
 585                 return;
 586         }
 587
 588         if (!cdr.Play && (cdr.StatP & STATUS_SEEK)) {
 589                 if (cdr.Stat) {
 590                         CDR_LOG_I("cdrom: seek stat hack\n");
 591                         CDRPLAYSEEKREAD_INT(0x1000);
 592                         return;
 593                 }
 594                 SetResultSize(1);
 595                 cdr.StatP |= STATUS_ROTATING;
 596                 SetPlaySeekRead(cdr.StatP, 0);
 597                 cdr.Result[0] = cdr.StatP;
 598                 if (cdr.Irq == 0) {
 599                         cdr.Stat = Complete;
 600                         setIrq(0x202);
 601                 }
 602
 603                 Find_CurTrack(cdr.SetSectorPlay);
 604                 ReadTrack(cdr.SetSectorPlay);
 605                 cdr.TrackChanged = FALSE;
 606                 return;
 607         }
 608
 609         if (!cdr.Play) return;
 610
 611         CDR_LOG( "CDDA - %d:%d:%d\n",
 612                 cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2] );
 613
 614         SetPlaySeekRead(cdr.StatP, STATUS_PLAY);
 615         if (memcmp(cdr.SetSectorPlay, cdr.SetSectorEnd, 3) == 0) {
 616                 StopCdda();
 617                 SetPlaySeekRead(cdr.StatP, 0);
 618                 cdr.TrackChanged = TRUE;
 619         }
 620         else {
 621                 CDR_readCDDA(cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2], (u8 *)read_buf);
 622         }
 623
 624         if (!cdr.Irq && !cdr.Stat && (cdr.Mode & (MODE_AUTOPAUSE|MODE_REPORT)))
 625                 cdrPlayInterrupt_Autopause();
 626
 627         if (CDR_readCDDA && !cdr.Muted && !Config.Cdda) {
 628                 cdrAttenuate(read_buf, CD_FRAMESIZE_RAW / 4, 1);
 629                 if (SPU_playCDDAchannel)
 630                         SPU_playCDDAchannel(read_buf, CD_FRAMESIZE_RAW);
 631         }
 632
 633         cdr.SetSectorPlay[2]++;
 634         if (cdr.SetSectorPlay[2] == 75) {
 635                 cdr.SetSectorPlay[2] = 0;
 636                 cdr.SetSectorPlay[1]++;
 637                 if (cdr.SetSectorPlay[1] == 60) {
 638                         cdr.SetSectorPlay[1] = 0;
 639                         cdr.SetSectorPlay[0]++;
 640                 }
 641         }
 642
 643         CDRPLAYSEEKREAD_INT(cdReadTime);
 644
 645         // update for CdlGetlocP/autopause
 646         generate_subq(cdr.SetSectorPlay);
 647 }
 648
 649 void cdrInterrupt(void) {
 650         u16 Irq = cdr.Irq;
 651         int no_busy_error = 0;
 652         int start_rotating = 0;
 653         int error = 0;
 654         int delay;
 655         unsigned int seekTime = 0;
 656         u8 set_loc[3];
 657         int i;
 658
 659         // Reschedule IRQ
 660         if (cdr.Stat) {
 661                 CDR_LOG_I("cdrom: stat hack: %02x %x\n", cdr.Irq, cdr.Stat);
 662                 CDR_INT(0x1000);
 663                 return;
 664         }
 665
 666         cdr.Ctrl &= ~0x80;
 667
 668         // default response
 669         SetResultSize(1);
 670         cdr.Result[0] = cdr.StatP;
 671         cdr.Stat = Acknowledge;
 672
 673         if (cdr.IrqRepeated) {
 674                 cdr.IrqRepeated = 0;
 675                 if (cdr.eCycle > psxRegs.cycle) {
 676                         CDR_INT(cdr.eCycle);
 677                         goto finish;
 678                 }
 679         }
 680
 681         cdr.Irq = 0;
 682
 683         switch (Irq) {
 684                 case CdlNop:
 685                         if (cdr.DriveState != DRIVESTATE_LID_OPEN)
 686                                 cdr.StatP &= ~STATUS_SHELLOPEN;
 687                         no_busy_error = 1;
 688                         break;
 689
 690                 case CdlSetloc:
 691                         CDR_LOG("CDROM setloc command (%02X, %02X, %02X)\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
 692
 693                         // MM must be BCD, SS must be BCD and <0x60, FF must be BCD and <0x75
 694                         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))
 695                         {
 696                                 CDR_LOG("Invalid/out of range seek to %02X:%02X:%02X\n", cdr.Param[0], cdr.Param[1], cdr.Param[2]);
 697                                 error = ERROR_INVALIDARG;
 698                                 goto set_error;
 699                         }
 700                         else
 701                         {
 702                                 for (i = 0; i < 3; i++)
 703                                         set_loc[i] = btoi(cdr.Param[i]);
 704                                 memcpy(cdr.SetSector, set_loc, 3);
 705                                 cdr.SetSector[3] = 0;
 706                                 cdr.SetlocPending = 1;
 707                         }
 708                         break;
 709
 710                 do_CdlPlay:
 711                 case CdlPlay:
 712                         StopCdda();
 713                         StopReading();
 714
 715                         cdr.FastBackward = 0;
 716                         cdr.FastForward = 0;
 717
 718                         // BIOS CD Player
 719                         // - Pause player, hit Track 01/02/../xx (Setloc issued!!)
 720
 721                         if (cdr.ParamC != 0 && cdr.Param[0] != 0) {
 722                                 int track = btoi( cdr.Param[0] );
 723
 724                                 if (track <= cdr.ResultTN[1])
 725                                         cdr.CurTrack = track;
 726
 727                                 CDR_LOG("PLAY track %d\n", cdr.CurTrack);
 728
 729                                 if (CDR_getTD((u8)cdr.CurTrack, cdr.ResultTD) != -1) {
 730                                         for (i = 0; i < 3; i++)
 731                                                 set_loc[i] = cdr.ResultTD[2 - i];
 732                                         seekTime = cdrSeekTime(set_loc);
 733                                         memcpy(cdr.SetSectorPlay, set_loc, 3);
 734                                 }
 735                         }
 736                         else if (cdr.SetlocPending) {
 737                                 seekTime = cdrSeekTime(cdr.SetSector);
 738                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 739                         }
 740                         else {
 741                                 CDR_LOG("PLAY Resume @ %d:%d:%d\n",
 742                                         cdr.SetSectorPlay[0], cdr.SetSectorPlay[1], cdr.SetSectorPlay[2]);
 743                         }
 744                         cdr.SetlocPending = 0;
 745
 746                         /*
 747                         Rayman: detect track changes
 748                         - fixes logo freeze
 749
 750                         Twisted Metal 2: skip PREGAP + starting accurate SubQ
 751                         - plays tracks without retry play
 752
 753                         Wild 9: skip PREGAP + starting accurate SubQ
 754                         - plays tracks without retry play
 755                         */
 756                         Find_CurTrack(cdr.SetSectorPlay);
 757                         ReadTrack(cdr.SetSectorPlay);
 758                         cdr.TrackChanged = FALSE;
 759
 760                         if (!Config.Cdda)
 761                                 CDR_play(cdr.SetSectorPlay);
 762
 763                         SetPlaySeekRead(cdr.StatP, STATUS_SEEK | STATUS_ROTATING);
 764
 765                         // BIOS player - set flag again
 766                         cdr.Play = TRUE;
 767
 768                         CDRPLAYSEEKREAD_INT(cdReadTime + seekTime);
 769                         start_rotating = 1;
 770                         break;
 771
 772                 case CdlForward:
 773                         // TODO: error 80 if stopped
 774                         cdr.Stat = Complete;
 775
 776                         // GameShark CD Player: Calls 2x + Play 2x
 777                         cdr.FastForward = 1;
 778                         cdr.FastBackward = 0;
 779                         break;
 780
 781                 case CdlBackward:
 782                         cdr.Stat = Complete;
 783
 784                         // GameShark CD Player: Calls 2x + Play 2x
 785                         cdr.FastBackward = 1;
 786                         cdr.FastForward = 0;
 787                         break;
 788
 789                 case CdlStandby:
 790                         if (cdr.DriveState != DRIVESTATE_STOPPED) {
 791                                 error = ERROR_INVALIDARG;
 792                                 goto set_error;
 793                         }
 794                         AddIrqQueue(CdlStandby + 0x100, cdReadTime * 125 / 2);
 795                         start_rotating = 1;
 796                         break;
 797
 798                 case CdlStandby + 0x100:
 799                         cdr.Stat = Complete;
 800                         break;
 801
 802                 case CdlStop:
 803                         if (cdr.Play) {
 804                                 // grab time for current track
 805                                 CDR_getTD((u8)(cdr.CurTrack), cdr.ResultTD);
 806
 807                                 cdr.SetSectorPlay[0] = cdr.ResultTD[2];
 808                                 cdr.SetSectorPlay[1] = cdr.ResultTD[1];
 809                                 cdr.SetSectorPlay[2] = cdr.ResultTD[0];
 810                         }
 811
 812                         StopCdda();
 813                         StopReading();
 814                         SetPlaySeekRead(cdr.StatP, 0);
 815                         cdr.StatP &= ~STATUS_ROTATING;
 816
 817                         delay = 0x800;
 818                         if (cdr.DriveState == DRIVESTATE_STANDBY)
 819                                 delay = cdReadTime * 30 / 2;
 820
 821                         cdr.DriveState = DRIVESTATE_STOPPED;
 822                         AddIrqQueue(CdlStop + 0x100, delay);
 823                         break;
 824
 825                 case CdlStop + 0x100:
 826                         cdr.Stat = Complete;
 827                         break;
 828
 829                 case CdlPause:
 830                         StopCdda();
 831                         StopReading();
 832                         /*
 833                         Gundam Battle Assault 2: much slower (*)
 834                         - Fixes boot, gameplay
 835
 836                         Hokuto no Ken 2: slower
 837                         - Fixes intro + subtitles
 838
 839                         InuYasha - Feudal Fairy Tale: slower
 840                         - Fixes battles
 841                         */
 842                         /* Gameblabla - Tightening the timings (as taken from Duckstation).
 843                          * The timings from Duckstation are based upon hardware tests.
 844                          * Mednafen's timing don't work for Gundam Battle Assault 2 in PAL/50hz mode,
 845                          * seems to be timing sensitive as it can depend on the CPU's clock speed.
 846                          * */
 847                         if (!(cdr.StatP & (STATUS_PLAY | STATUS_READ)))
 848                         {
 849                                 delay = 7000;
 850                         }
 851                         else
 852                         {
 853                                 delay = (((cdr.Mode & MODE_SPEED) ? 2 : 1) * (1000000));
 854                         }
 855                         AddIrqQueue(CdlPause + 0x100, delay);
 856                         SetPlaySeekRead(cdr.StatP, 0);
 857                         cdr.Ctrl |= 0x80;
 858                         break;
 859
 860                 case CdlPause + 0x100:
 861                         cdr.Stat = Complete;
 862                         break;
 863
 864                 case CdlReset:
 865                         StopCdda();
 866                         StopReading();
 867                         SetPlaySeekRead(cdr.StatP, 0);
 868                         cdr.Muted = FALSE;
 869                         cdr.Mode = 0x20; /* This fixes This is Football 2, Pooh's Party lockups */
 870                         AddIrqQueue(CdlReset + 0x100, 4100000);
 871                         no_busy_error = 1;
 872                         start_rotating = 1;
 873                         break;
 874
 875                 case CdlReset + 0x100:
 876                         cdr.Stat = Complete;
 877                         break;
 878
 879                 case CdlMute:
 880                         cdr.Muted = TRUE;
 881                         break;
 882
 883                 case CdlDemute:
 884                         cdr.Muted = FALSE;
 885                         break;
 886
 887                 case CdlSetfilter:
 888                         cdr.File = cdr.Param[0];
 889                         cdr.Channel = cdr.Param[1];
 890                         break;
 891
 892                 case CdlSetmode:
 893                         no_busy_error = 1;
 894                         break;
 895
 896                 case CdlGetparam:
 897                         /* Gameblabla : According to mednafen, Result size should be 5 and done this way. */
 898                         SetResultSize(5);
 899                         cdr.Result[1] = cdr.Mode;
 900                         cdr.Result[2] = 0;
 901                         cdr.Result[3] = cdr.File;
 902                         cdr.Result[4] = cdr.Channel;
 903                         no_busy_error = 1;
 904                         break;
 905
 906                 case CdlGetlocL:
 907                         SetResultSize(8);
 908                         memcpy(cdr.Result, cdr.Transfer, 8);
 909                         break;
 910
 911                 case CdlGetlocP:
 912                         SetResultSize(8);
 913                         memcpy(&cdr.Result, &cdr.subq, 8);
 914                         break;
 915
 916                 case CdlReadT: // SetSession?
 917                         // really long
 918                         AddIrqQueue(CdlReadT + 0x100, cdReadTime * 290 / 4);
 919                         start_rotating = 1;
 920                         break;
 921
 922                 case CdlReadT + 0x100:
 923                         cdr.Stat = Complete;
 924                         break;
 925
 926                 case CdlGetTN:
 927                         SetResultSize(3);
 928                         if (CDR_getTN(cdr.ResultTN) == -1) {
 929                                 cdr.Stat = DiskError;
 930                                 cdr.Result[0] |= STATUS_ERROR;
 931                         } else {
 932                                 cdr.Stat = Acknowledge;
 933                                 cdr.Result[1] = itob(cdr.ResultTN[0]);
 934                                 cdr.Result[2] = itob(cdr.ResultTN[1]);
 935                         }
 936                         break;
 937
 938                 case CdlGetTD:
 939                         cdr.Track = btoi(cdr.Param[0]);
 940                         SetResultSize(4);
 941                         if (CDR_getTD(cdr.Track, cdr.ResultTD) == -1) {
 942                                 cdr.Stat = DiskError;
 943                                 cdr.Result[0] |= STATUS_ERROR;
 944                         } else {
 945                                 cdr.Stat = Acknowledge;
 946                                 cdr.Result[0] = cdr.StatP;
 947                                 cdr.Result[1] = itob(cdr.ResultTD[2]);
 948                                 cdr.Result[2] = itob(cdr.ResultTD[1]);
 949                                 /* According to Nocash's documentation, the function doesn't care about ff.
 950                                  * This can be seen also in Mednafen's implementation. */
 951                                 //cdr.Result[3] = itob(cdr.ResultTD[0]);
 952                         }
 953                         break;
 954
 955                 case CdlSeekL:
 956                 case CdlSeekP:
 957                         StopCdda();
 958                         StopReading();
 959                         SetPlaySeekRead(cdr.StatP, STATUS_SEEK);
 960
 961                         seekTime = cdrSeekTime(cdr.SetSector);
 962                         memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
 963                         /*
 964                         Crusaders of Might and Magic = 0.5x-4x
 965                         - fix cutscene speech start
 966
 967                         Eggs of Steel = 2x-?
 968                         - fix new game
 969
 970                         Medievil = ?-4x
 971                         - fix cutscene speech
 972
 973                         Rockman X5 = 0.5-4x
 974                         - fix capcom logo
 975                         */
 976                         CDRPLAYSEEKREAD_INT(cdReadTime + seekTime);
 977                         start_rotating = 1;
 978                         break;
 979
 980                 case CdlTest:
 981                         switch (cdr.Param[0]) {
 982                                 case 0x20: // System Controller ROM Version
 983                                         SetResultSize(4);
 984                                         memcpy(cdr.Result, Test20, 4);
 985                                         break;
 986                                 case 0x22:
 987                                         SetResultSize(8);
 988                                         memcpy(cdr.Result, Test22, 4);
 989                                         break;
 990                                 case 0x23: case 0x24:
 991                                         SetResultSize(8);
 992                                         memcpy(cdr.Result, Test23, 4);
 993                                         break;
 994                         }
 995                         no_busy_error = 1;
 996                         break;
 997
 998                 case CdlID:
 999                         AddIrqQueue(CdlID + 0x100, 20480);
1000                         break;
1001
1002                 case CdlID + 0x100:
1003                         SetResultSize(8);
1004                         cdr.Result[0] = cdr.StatP;
1005                         cdr.Result[1] = 0;
1006                         cdr.Result[2] = 0;
1007                         cdr.Result[3] = 0;
1008
1009                         // 0x10 - audio | 0x40 - disk missing | 0x80 - unlicensed
1010                         if (CDR_getStatus(&stat) == -1 || stat.Type == 0 || stat.Type == 0xff) {
1011                                 cdr.Result[1] = 0xc0;
1012                         }
1013                         else {
1014                                 if (stat.Type == 2)
1015                                         cdr.Result[1] |= 0x10;
1016                                 if (CdromId[0] == '\0')
1017                                         cdr.Result[1] |= 0x80;
1018                         }
1019                         cdr.Result[0] |= (cdr.Result[1] >> 4) & 0x08;
1020
1021                         /* This adds the string "PCSX" in Playstation bios boot screen */
1022                         memcpy((char *)&cdr.Result[4], "PCSX", 4);
1023                         cdr.Stat = Complete;
1024                         break;
1025
1026                 case CdlInit:
1027                         StopCdda();
1028                         StopReading();
1029                         SetPlaySeekRead(cdr.StatP, 0);
1030                         // yes, it really sets STATUS_SHELLOPEN
1031                         cdr.StatP |= STATUS_SHELLOPEN;
1032                         cdr.DriveState = DRIVESTATE_RESCAN_CD;
1033                         CDRLID_INT(20480);
1034                         no_busy_error = 1;
1035                         start_rotating = 1;
1036                         break;
1037
1038                 case CdlGetQ:
1039                         no_busy_error = 1;
1040                         break;
1041
1042                 case CdlReadToc:
1043                         AddIrqQueue(CdlReadToc + 0x100, cdReadTime * 180 / 4);
1044                         no_busy_error = 1;
1045                         start_rotating = 1;
1046                         break;
1047
1048                 case CdlReadToc + 0x100:
1049                         cdr.Stat = Complete;
1050                         no_busy_error = 1;
1051                         break;
1052
1053                 case CdlReadN:
1054                 case CdlReadS:
1055                         Find_CurTrack(cdr.SetlocPending ? cdr.SetSector : cdr.SetSectorPlay);
1056
1057                         if ((cdr.Mode & MODE_CDDA) && cdr.CurTrack > 1)
1058                                 // Read* acts as play for cdda tracks in cdda mode
1059                                 goto do_CdlPlay;
1060
1061                         StopCdda();
1062                         if (cdr.SetlocPending) {
1063                                 seekTime = cdrSeekTime(cdr.SetSector);
1064                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 4);
1065                                 cdr.SetlocPending = 0;
1066                         }
1067                         cdr.Reading = 1;
1068                         cdr.FirstSector = 1;
1069
1070                         // Fighting Force 2 - update subq time immediately
1071                         // - fixes new game
1072                         ReadTrack(cdr.SetSectorPlay);
1073
1074                         /*
1075                         Duke Nukem: Land of the Babes - seek then delay read for one frame
1076                         - fixes cutscenes
1077                         C-12 - Final Resistance - doesn't like seek
1078                         */
1079
1080                         /*
1081                                 By nicolasnoble from PCSX Redux :
1082                                 "It LOOKS like this logic is wrong, therefore disabling it with `&& false` for now.
1083                                 For "PoPoLoCrois Monogatari II", the game logic will soft lock and will never issue GetLocP to detect
1084                                 the end of its XA streams, as it seems to assume ReadS will not return a status byte with the SEEK
1085                                 flag set. I think the reasonning is that since it's invalid to call GetLocP while seeking, the game
1086                                 tries to protect itself against errors by preventing from issuing a GetLocP while it knows the
1087                                 last status was "seek". But this makes the logic just softlock as it'll never get a notification
1088                                 about the fact the drive is done seeking and the read actually started.
1089
1090                                 In other words, this state machine here is probably wrong in assuming the response to ReadS/ReadN is
1091                                 done right away. It's rather when it's done seeking, and the read has actually started. This probably
1092                                 requires a bit more work to make sure seek delays are processed properly.
1093                                 Checked with a few games, this seems to work fine."
1094
1095                                 Gameblabla additional notes :
1096                                 This still needs the "+ seekTime" that PCSX Redux doesn't have for the Driver "retry" mission error.
1097                         */
1098                         CDRPLAYSEEKREAD_INT(((cdr.Mode & 0x80) ? (cdReadTime) : cdReadTime * 2) + seekTime);
1099
1100                         SetPlaySeekRead(cdr.StatP, STATUS_SEEK);
1101                         start_rotating = 1;
1102                         break;
1103                 case CdlSync:
1104                 default:
1105                         CDR_LOG_I("Invalid command: %02x\n", Irq);
1106                         error = ERROR_INVALIDCMD;
1107                         // FALLTHROUGH
1108
1109                 set_error:
1110                         SetResultSize(2);
1111                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1112                         cdr.Result[1] = error;
1113                         cdr.Stat = DiskError;
1114                         break;
1115         }
1116
1117         if (cdr.DriveState == DRIVESTATE_STOPPED && start_rotating) {
1118                 cdr.DriveState = DRIVESTATE_STANDBY;
1119                 cdr.StatP |= STATUS_ROTATING;
1120         }
1121
1122         if (!no_busy_error) {
1123                 switch (cdr.DriveState) {
1124                 case DRIVESTATE_LID_OPEN:
1125                 case DRIVESTATE_RESCAN_CD:
1126                 case DRIVESTATE_PREPARE_CD:
1127                         SetResultSize(2);
1128                         cdr.Result[0] = cdr.StatP | STATUS_ERROR;
1129                         cdr.Result[1] = ERROR_NOTREADY;
1130                         cdr.Stat = DiskError;
1131                         break;
1132                 }
1133         }
1134
1135 finish:
1136         setIrq(Irq);
1137         cdr.ParamC = 0;
1138 }
1139
1140 #ifdef HAVE_ARMV7
1141  #define ssat32_to_16(v) \
1142   asm("ssat %0,#16,%1" : "=r" (v) : "r" (v))
1143 #else
1144  #define ssat32_to_16(v) do { \
1145   if (v < -32768) v = -32768; \
1146   else if (v > 32767) v = 32767; \
1147  } while (0)
1148 #endif
1149
1150 void cdrAttenuate(s16 *buf, int samples, int stereo)
1151 {
1152         int i, l, r;
1153         int ll = cdr.AttenuatorLeftToLeft;
1154         int lr = cdr.AttenuatorLeftToRight;
1155         int rl = cdr.AttenuatorRightToLeft;
1156         int rr = cdr.AttenuatorRightToRight;
1157
1158         if (lr == 0 && rl == 0 && 0x78 <= ll && ll <= 0x88 && 0x78 <= rr && rr <= 0x88)
1159                 return;
1160
1161         if (!stereo && ll == 0x40 && lr == 0x40 && rl == 0x40 && rr == 0x40)
1162                 return;
1163
1164         if (stereo) {
1165                 for (i = 0; i < samples; i++) {
1166                         l = buf[i * 2];
1167                         r = buf[i * 2 + 1];
1168                         l = (l * ll + r * rl) >> 7;
1169                         r = (r * rr + l * lr) >> 7;
1170                         ssat32_to_16(l);
1171                         ssat32_to_16(r);
1172                         buf[i * 2] = l;
1173                         buf[i * 2 + 1] = r;
1174                 }
1175         }
1176         else {
1177                 for (i = 0; i < samples; i++) {
1178                         l = buf[i];
1179                         l = l * (ll + rl) >> 7;
1180                         //r = r * (rr + lr) >> 7;
1181                         ssat32_to_16(l);
1182                         //ssat32_to_16(r);
1183                         buf[i] = l;
1184                 }
1185         }
1186 }
1187
1188 static void cdrReadInterrupt(void)
1189 {
1190         u8 *buf;
1191
1192         if (cdr.Irq || cdr.Stat) {
1193                 CDR_LOG_I("cdrom: read stat hack %02x %x\n", cdr.Irq, cdr.Stat);
1194                 CDRPLAYSEEKREAD_INT(2048);
1195                 return;
1196         }
1197
1198         cdr.OCUP = 1;
1199         SetResultSize(1);
1200         SetPlaySeekRead(cdr.StatP, STATUS_READ | STATUS_ROTATING);
1201         cdr.Result[0] = cdr.StatP;
1202
1203         ReadTrack(cdr.SetSectorPlay);
1204
1205         buf = CDR_getBuffer();
1206         if (buf == NULL)
1207                 cdr.NoErr = 0;
1208
1209         if (!cdr.NoErr) {
1210                 CDR_LOG_I("cdrReadInterrupt() Log: err\n");
1211                 memset(cdr.Transfer, 0, DATA_SIZE);
1212                 cdr.Stat = DiskError;
1213                 cdr.Result[0] |= STATUS_ERROR;
1214                 setIrq(0x205);
1215                 return;
1216         }
1217
1218         memcpy(cdr.Transfer, buf, DATA_SIZE);
1219         CheckPPFCache(cdr.Transfer, cdr.Prev[0], cdr.Prev[1], cdr.Prev[2]);
1220
1221
1222         CDR_LOG("cdrReadInterrupt() Log: cdr.Transfer %x:%x:%x\n", cdr.Transfer[0], cdr.Transfer[1], cdr.Transfer[2]);
1223
1224         if ((!cdr.Muted) && (cdr.Mode & MODE_STRSND) && (!Config.Xa) && (cdr.FirstSector != -1)) { // CD-XA
1225                 // Firemen 2: Multi-XA files - briefings, cutscenes
1226                 if( cdr.FirstSector == 1 && (cdr.Mode & MODE_SF)==0 ) {
1227                         cdr.File = cdr.Transfer[4 + 0];
1228                         cdr.Channel = cdr.Transfer[4 + 1];
1229                 }
1230
1231                 /* Gameblabla
1232                  * Skips playing on channel 255.
1233                  * Fixes missing audio in Blue's Clues : Blue's Big Musical. (Should also fix Taxi 2)
1234                  * TODO : Check if this is the proper behaviour.
1235                  * */
1236                 if((cdr.Transfer[4 + 2] & 0x4) &&
1237                          (cdr.Transfer[4 + 1] == cdr.Channel) &&
1238                          (cdr.Transfer[4 + 0] == cdr.File) && cdr.Channel != 255) {
1239                         int ret = xa_decode_sector(&cdr.Xa, cdr.Transfer+4, cdr.FirstSector);
1240                         if (!ret) {
1241                                 cdrAttenuate(cdr.Xa.pcm, cdr.Xa.nsamples, cdr.Xa.stereo);
1242                                 SPU_playADPCMchannel(&cdr.Xa);
1243                                 cdr.FirstSector = 0;
1244                         }
1245                         else cdr.FirstSector = -1;
1246                 }
1247         }
1248
1249         cdr.SetSectorPlay[2]++;
1250         if (cdr.SetSectorPlay[2] == 75) {
1251                 cdr.SetSectorPlay[2] = 0;
1252                 cdr.SetSectorPlay[1]++;
1253                 if (cdr.SetSectorPlay[1] == 60) {
1254                         cdr.SetSectorPlay[1] = 0;
1255                         cdr.SetSectorPlay[0]++;
1256                 }
1257         }
1258
1259         cdr.Readed = 0;
1260
1261         CDRPLAYSEEKREAD_INT((cdr.Mode & MODE_SPEED) ? (cdReadTime / 2) : cdReadTime);
1262
1263         /*
1264         Croc 2: $40 - only FORM1 (*)
1265         Judge Dredd: $C8 - only FORM1 (*)
1266         Sim Theme Park - no adpcm at all (zero)
1267         */
1268
1269         if (!(cdr.Mode & MODE_STRSND) || !(cdr.Transfer[4+2] & 0x4)) {
1270                 cdr.Stat = DataReady;
1271                 setIrq(0x203);
1272         }
1273
1274         // update for CdlGetlocP
1275         ReadTrack(cdr.SetSectorPlay);
1276 }
1277
1278 /*
1279 cdrRead0:
1280         bit 0,1 - mode
1281         bit 2 - unknown
1282         bit 3 - unknown
1283         bit 4 - unknown
1284         bit 5 - 1 result ready
1285         bit 6 - 1 dma ready
1286         bit 7 - 1 command being processed
1287 */
1288
1289 unsigned char cdrRead0(void) {
1290         if (cdr.ResultReady)
1291                 cdr.Ctrl |= 0x20;
1292         else
1293                 cdr.Ctrl &= ~0x20;
1294
1295         if (cdr.OCUP)
1296                 cdr.Ctrl |= 0x40;
1297 //  else
1298 //              cdr.Ctrl &= ~0x40;
1299
1300         // What means the 0x10 and the 0x08 bits? I only saw it used by the bios
1301         cdr.Ctrl |= 0x18;
1302
1303         CDR_LOG_IO("cdr r0.sta: %02x\n", cdr.Ctrl);
1304
1305         return psxHu8(0x1800) = cdr.Ctrl;
1306 }
1307
1308 void cdrWrite0(unsigned char rt) {
1309         CDR_LOG_IO("cdr w0.idx: %02x\n", rt);
1310
1311         cdr.Ctrl = (rt & 3) | (cdr.Ctrl & ~3);
1312 }
1313
1314 unsigned char cdrRead1(void) {
1315         if ((cdr.ResultP & 0xf) < cdr.ResultC)
1316                 psxHu8(0x1801) = cdr.Result[cdr.ResultP & 0xf];
1317         else
1318                 psxHu8(0x1801) = 0;
1319         cdr.ResultP++;
1320         if (cdr.ResultP == cdr.ResultC)
1321                 cdr.ResultReady = 0;
1322
1323         CDR_LOG_IO("cdr r1.rsp: %02x #%u\n", psxHu8(0x1801), cdr.ResultP - 1);
1324
1325         return psxHu8(0x1801);
1326 }
1327
1328 void cdrWrite1(unsigned char rt) {
1329         const char *rnames[] = { "cmd", "smd", "smc", "arr" }; (void)rnames;
1330         CDR_LOG_IO("cdr w1.%s: %02x\n", rnames[cdr.Ctrl & 3], rt);
1331
1332         switch (cdr.Ctrl & 3) {
1333         case 0:
1334                 break;
1335         case 3:
1336                 cdr.AttenuatorRightToRightT = rt;
1337                 return;
1338         default:
1339                 return;
1340         }
1341
1342         cdr.Cmd = rt;
1343         cdr.OCUP = 0;
1344
1345 #ifdef CDR_LOG_CMD_IRQ
1346         SysPrintf("CD1 write: %x (%s)", rt, CmdName[rt]);
1347         if (cdr.ParamC) {
1348                 int i;
1349                 SysPrintf(" Param[%d] = {", cdr.ParamC);
1350                 for (i = 0; i < cdr.ParamC; i++)
1351                         SysPrintf(" %x,", cdr.Param[i]);
1352                 SysPrintf("}\n");
1353         } else {
1354                 SysPrintf("\n");
1355         }
1356 #endif
1357
1358         cdr.ResultReady = 0;
1359         cdr.Ctrl |= 0x80;
1360         // cdr.Stat = NoIntr;
1361         AddIrqQueue(cdr.Cmd, 0x800);
1362
1363         switch (cdr.Cmd) {
1364         case CdlSetmode:
1365                 CDR_LOG("cdrWrite1() Log: Setmode %x\n", cdr.Param[0]);
1366
1367                 cdr.Mode = cdr.Param[0];
1368                 break;
1369         }
1370 }
1371
1372 unsigned char cdrRead2(void) {
1373         unsigned char ret;
1374
1375         if (cdr.Readed == 0) {
1376                 ret = 0;
1377         } else {
1378                 ret = *pTransfer++;
1379         }
1380
1381         CDR_LOG_IO("cdr r2.dat: %02x\n", ret);
1382         return ret;
1383 }
1384
1385 void cdrWrite2(unsigned char rt) {
1386         const char *rnames[] = { "prm", "ien", "all", "arl" }; (void)rnames;
1387         CDR_LOG_IO("cdr w2.%s: %02x\n", rnames[cdr.Ctrl & 3], rt);
1388
1389         switch (cdr.Ctrl & 3) {
1390         case 0:
1391                 if (cdr.ParamC < 8) // FIXME: size and wrapping
1392                         cdr.Param[cdr.ParamC++] = rt;
1393                 return;
1394         case 1:
1395                 cdr.Reg2 = rt;
1396                 setIrq(0x204);
1397                 return;
1398         case 2:
1399                 cdr.AttenuatorLeftToLeftT = rt;
1400                 return;
1401         case 3:
1402                 cdr.AttenuatorRightToLeftT = rt;
1403                 return;
1404         }
1405 }
1406
1407 unsigned char cdrRead3(void) {
1408         if (cdr.Ctrl & 0x1)
1409                 psxHu8(0x1803) = cdr.Stat | 0xE0;
1410         else
1411                 psxHu8(0x1803) = cdr.Reg2 | 0xE0;
1412
1413         CDR_LOG_IO("cdr r3.%s: %02x\n", (cdr.Ctrl & 1) ? "ifl" : "ien", psxHu8(0x1803));
1414         return psxHu8(0x1803);
1415 }
1416
1417 void cdrWrite3(unsigned char rt) {
1418         const char *rnames[] = { "req", "ifl", "alr", "ava" }; (void)rnames;
1419         CDR_LOG_IO("cdr w3.%s: %02x\n", rnames[cdr.Ctrl & 3], rt);
1420
1421         switch (cdr.Ctrl & 3) {
1422         case 0:
1423                 break; // transfer
1424         case 1:
1425                 cdr.Stat &= ~rt;
1426
1427                 if (rt & 0x40)
1428                         cdr.ParamC = 0;
1429                 return;
1430         case 2:
1431                 cdr.AttenuatorLeftToRightT = rt;
1432                 return;
1433         case 3:
1434                 if (rt & 0x20) {
1435                         memcpy(&cdr.AttenuatorLeftToLeft, &cdr.AttenuatorLeftToLeftT, 4);
1436                         CDR_LOG_I("CD-XA Volume: %02x %02x | %02x %02x\n",
1437                                 cdr.AttenuatorLeftToLeft, cdr.AttenuatorLeftToRight,
1438                                 cdr.AttenuatorRightToLeft, cdr.AttenuatorRightToRight);
1439                 }
1440                 return;
1441         }
1442
1443         if ((rt & 0x80) && cdr.Readed == 0) {
1444                 cdr.Readed = 1;
1445                 pTransfer = cdr.Transfer;
1446
1447                 switch (cdr.Mode & 0x30) {
1448                         case MODE_SIZE_2328:
1449                         case 0x00:
1450                                 pTransfer += 12;
1451                                 break;
1452
1453                         case MODE_SIZE_2340:
1454                                 pTransfer += 0;
1455                                 break;
1456
1457                         default:
1458                                 break;
1459                 }
1460         }
1461 }
1462
1463 void psxDma3(u32 madr, u32 bcr, u32 chcr) {
1464         u32 cdsize;
1465         int size;
1466         u8 *ptr;
1467
1468         CDR_LOG("psxDma3() Log: *** DMA 3 *** %x addr = %x size = %x\n", chcr, madr, bcr);
1469
1470         switch (chcr) {
1471                 case 0x11000000:
1472                 case 0x11400100:
1473                         if (cdr.Readed == 0) {
1474                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NOT READY\n");
1475                                 break;
1476                         }
1477
1478                         cdsize = (bcr & 0xffff) * 4;
1479
1480                         // Ape Escape: bcr = 0001 / 0000
1481                         // - fix boot
1482                         if( cdsize == 0 )
1483                         {
1484                                 switch (cdr.Mode & (MODE_SIZE_2340|MODE_SIZE_2328)) {
1485                                         case MODE_SIZE_2340: cdsize = 2340; break;
1486                                         case MODE_SIZE_2328: cdsize = 2328; break;
1487                                         default:
1488                                         case MODE_SIZE_2048: cdsize = 2048; break;
1489                                 }
1490                         }
1491
1492
1493                         ptr = (u8 *)PSXM(madr);
1494                         if (ptr == NULL) {
1495                                 CDR_LOG("psxDma3() Log: *** DMA 3 *** NULL Pointer!\n");
1496                                 break;
1497                         }
1498
1499                         /*
1500                         GS CDX: Enhancement CD crash
1501                         - Setloc 0:0:0
1502                         - CdlPlay
1503                         - Spams DMA3 and gets buffer overrun
1504                         */
1505                         size = CD_FRAMESIZE_RAW - (pTransfer - cdr.Transfer);
1506                         if (size > cdsize)
1507                                 size = cdsize;
1508                         if (size > 0)
1509                         {
1510                                 memcpy(ptr, pTransfer, size);
1511                         }
1512
1513                         psxCpu->Clear(madr, cdsize / 4);
1514                         pTransfer += cdsize;
1515
1516                         if( chcr == 0x11400100 ) {
1517                                 HW_DMA3_MADR = SWAPu32(madr + cdsize);
1518                                 CDRDMA_INT( (cdsize/4) / 4 );
1519                         }
1520                         else if( chcr == 0x11000000 ) {
1521                                 // CDRDMA_INT( (cdsize/4) * 1 );
1522                                 // halted
1523                                 psxRegs.cycle += (cdsize/4) * 24/2;
1524                                 CDRDMA_INT(16);
1525                         }
1526                         return;
1527
1528                 default:
1529                         CDR_LOG("psxDma3() Log: Unknown cddma %x\n", chcr);
1530                         break;
1531         }
1532
1533         HW_DMA3_CHCR &= SWAP32(~0x01000000);
1534         DMA_INTERRUPT(3);
1535 }
1536
1537 void cdrDmaInterrupt(void)
1538 {
1539         if (HW_DMA3_CHCR & SWAP32(0x01000000))
1540         {
1541                 HW_DMA3_CHCR &= SWAP32(~0x01000000);
1542                 DMA_INTERRUPT(3);
1543         }
1544 }
1545
1546 static void getCdInfo(void)
1547 {
1548         u8 tmp;
1549
1550         CDR_getTN(cdr.ResultTN);
1551         CDR_getTD(0, cdr.SetSectorEnd);
1552         tmp = cdr.SetSectorEnd[0];
1553         cdr.SetSectorEnd[0] = cdr.SetSectorEnd[2];
1554         cdr.SetSectorEnd[2] = tmp;
1555 }
1556
1557 void cdrReset() {
1558         memset(&cdr, 0, sizeof(cdr));
1559         cdr.CurTrack = 1;
1560         cdr.File = 1;
1561         cdr.Channel = 1;
1562         cdr.Reg2 = 0x1f;
1563         cdr.Stat = NoIntr;
1564         cdr.DriveState = DRIVESTATE_STANDBY;
1565         cdr.StatP = STATUS_ROTATING;
1566         pTransfer = cdr.Transfer;
1567
1568         // BIOS player - default values
1569         cdr.AttenuatorLeftToLeft = 0x80;
1570         cdr.AttenuatorLeftToRight = 0x00;
1571         cdr.AttenuatorRightToLeft = 0x00;
1572         cdr.AttenuatorRightToRight = 0x80;
1573
1574         getCdInfo();
1575 }
1576
1577 int cdrFreeze(void *f, int Mode) {
1578         u32 tmp;
1579         u8 tmpp[3];
1580
1581         if (Mode == 0 && !Config.Cdda)
1582                 CDR_stop();
1583
1584         cdr.freeze_ver = 0x63647202;
1585         gzfreeze(&cdr, sizeof(cdr));
1586
1587         if (Mode == 1) {
1588                 cdr.ParamP = cdr.ParamC;
1589                 tmp = pTransfer - cdr.Transfer;
1590         }
1591
1592         gzfreeze(&tmp, sizeof(tmp));
1593
1594         if (Mode == 0) {
1595                 getCdInfo();
1596
1597                 pTransfer = cdr.Transfer + tmp;
1598
1599                 // read right sub data
1600                 tmpp[0] = btoi(cdr.Prev[0]);
1601                 tmpp[1] = btoi(cdr.Prev[1]);
1602                 tmpp[2] = btoi(cdr.Prev[2]);
1603                 cdr.Prev[0]++;
1604                 ReadTrack(tmpp);
1605
1606                 if (cdr.Play) {
1607                         if (cdr.freeze_ver < 0x63647202)
1608                                 memcpy(cdr.SetSectorPlay, cdr.SetSector, 3);
1609
1610                         Find_CurTrack(cdr.SetSectorPlay);
1611                         if (!Config.Cdda)
1612                                 CDR_play(cdr.SetSectorPlay);
1613                         if (psxRegs.interrupt & (1 << PSXINT_CDRPLAY_OLD))
1614                                 CDRPLAYSEEKREAD_INT((cdr.Mode & 0x80) ? (cdReadTime / 2) : cdReadTime);
1615                 }
1616
1617                 if ((cdr.freeze_ver & 0xffffff00) != 0x63647200) {
1618                         // old versions did not latch Reg2, have to fixup..
1619                         if (cdr.Reg2 == 0) {
1620                                 SysPrintf("cdrom: fixing up old savestate\n");
1621                                 cdr.Reg2 = 7;
1622                         }
1623                         // also did not save Attenuator..
1624                         if ((cdr.AttenuatorLeftToLeft | cdr.AttenuatorLeftToRight
1625                              | cdr.AttenuatorRightToLeft | cdr.AttenuatorRightToRight) == 0)
1626                         {
1627                                 cdr.AttenuatorLeftToLeft = cdr.AttenuatorRightToRight = 0x80;
1628                         }
1629                 }
1630         }
1631
1632         return 0;
1633 }
1634
1635 void LidInterrupt(void) {
1636         getCdInfo();
1637         cdrLidSeekInterrupt();
1638 }