| 1 | #include <stdio.h>\r |
| 2 | #include <stdlib.h>\r |
| 3 | #include <string.h>\r |
| 4 | #include <unistd.h>\r |
| 5 | #include <sys/mman.h>\r |
| 6 | #include <sys/ioctl.h>\r |
| 7 | #include <fcntl.h>\r |
| 8 | #include <errno.h>\r |
| 9 | \r |
| 10 | #include "940shared.h"\r |
| 11 | #include "gp2x.h"\r |
| 12 | #include "emu.h"\r |
| 13 | #include "menu.h"\r |
| 14 | #include "asmutils.h"\r |
| 15 | \r |
| 16 | /* we will need some gp2x internals here */\r |
| 17 | extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r |
| 18 | extern volatile unsigned long *gp2x_memregl;\r |
| 19 | \r |
| 20 | static unsigned char *shared_mem = 0;\r |
| 21 | static _940_data_t *shared_data = 0;\r |
| 22 | static _940_ctl_t *shared_ctl = 0;\r |
| 23 | \r |
| 24 | int crashed_940 = 0;\r |
| 25 | \r |
| 26 | \r |
| 27 | /***********************************************************/\r |
| 28 | \r |
| 29 | #define MAXOUT (+32767)\r |
| 30 | #define MINOUT (-32768)\r |
| 31 | \r |
| 32 | /* limitter */\r |
| 33 | #define Limit(val, max,min) { \\r |
| 34 | if ( val > max ) val = max; \\r |
| 35 | else if ( val < min ) val = min; \\r |
| 36 | }\r |
| 37 | \r |
| 38 | /* these will be managed locally on our side */\r |
| 39 | extern int *ym2612_dacen;\r |
| 40 | extern INT32 *ym2612_dacout;\r |
| 41 | extern void *ym2612_regs;\r |
| 42 | \r |
| 43 | static UINT8 *REGS = 0; /* we will also keep local copy of regs for savestates and such */\r |
| 44 | static INT32 addr_A1; /* address line A1 */\r |
| 45 | static int dacen;\r |
| 46 | static INT32 dacout;\r |
| 47 | static UINT8 ST_address; /* address register */\r |
| 48 | static UINT8 ST_status; /* status flag */\r |
| 49 | static UINT8 ST_mode; /* mode CSM / 3SLOT */\r |
| 50 | static int ST_TA; /* timer a */\r |
| 51 | static int ST_TAC; /* timer a maxval */\r |
| 52 | static int ST_TAT; /* timer a ticker */\r |
| 53 | static UINT8 ST_TB; /* timer b */\r |
| 54 | static int ST_TBC; /* timer b maxval */\r |
| 55 | static int ST_TBT; /* timer b ticker */\r |
| 56 | \r |
| 57 | static int writebuff_ptr = 0;\r |
| 58 | \r |
| 59 | \r |
| 60 | /* OPN Mode Register Write */\r |
| 61 | static void set_timers( int v )\r |
| 62 | {\r |
| 63 | /* b7 = CSM MODE */\r |
| 64 | /* b6 = 3 slot mode */\r |
| 65 | /* b5 = reset b */\r |
| 66 | /* b4 = reset a */\r |
| 67 | /* b3 = timer enable b */\r |
| 68 | /* b2 = timer enable a */\r |
| 69 | /* b1 = load b */\r |
| 70 | /* b0 = load a */\r |
| 71 | ST_mode = v;\r |
| 72 | \r |
| 73 | /* reset Timer b flag */\r |
| 74 | if( v & 0x20 )\r |
| 75 | ST_status &= ~2;\r |
| 76 | \r |
| 77 | /* reset Timer a flag */\r |
| 78 | if( v & 0x10 )\r |
| 79 | ST_status &= ~1;\r |
| 80 | }\r |
| 81 | \r |
| 82 | /* YM2612 write */\r |
| 83 | /* a = address */\r |
| 84 | /* v = value */\r |
| 85 | /* returns 1 if sample affecting state changed */\r |
| 86 | int YM2612Write_940(unsigned int a, unsigned int v)\r |
| 87 | {\r |
| 88 | int addr; //, ret=1;\r |
| 89 | \r |
| 90 | v &= 0xff; /* adjust to 8 bit bus */\r |
| 91 | a &= 3;\r |
| 92 | \r |
| 93 | switch( a ) {\r |
| 94 | case 0: /* address port 0 */\r |
| 95 | ST_address = v;\r |
| 96 | addr_A1 = 0;\r |
| 97 | //ret=0;\r |
| 98 | break;\r |
| 99 | \r |
| 100 | case 1: /* data port 0 */\r |
| 101 | if (addr_A1 != 0) {\r |
| 102 | return 0; /* verified on real YM2608 */\r |
| 103 | }\r |
| 104 | \r |
| 105 | addr = ST_address;\r |
| 106 | REGS[addr] = v;\r |
| 107 | \r |
| 108 | switch( addr & 0xf0 )\r |
| 109 | {\r |
| 110 | case 0x20: /* 0x20-0x2f Mode */\r |
| 111 | switch( addr )\r |
| 112 | {\r |
| 113 | case 0x24: { // timer A High 8\r |
| 114 | int TAnew = (ST_TA & 0x03)|(((int)v)<<2);\r |
| 115 | if(ST_TA != TAnew) {\r |
| 116 | // we should reset ticker only if new value is written. Outrun requires this.\r |
| 117 | ST_TA = TAnew;\r |
| 118 | ST_TAC = (1024-TAnew)*18;\r |
| 119 | ST_TAT = 0;\r |
| 120 | }\r |
| 121 | return 0;\r |
| 122 | }\r |
| 123 | case 0x25: { // timer A Low 2\r |
| 124 | int TAnew = (ST_TA & 0x3fc)|(v&3);\r |
| 125 | if(ST_TA != TAnew) {\r |
| 126 | ST_TA = TAnew;\r |
| 127 | ST_TAC = (1024-TAnew)*18;\r |
| 128 | ST_TAT = 0;\r |
| 129 | }\r |
| 130 | return 0;\r |
| 131 | }\r |
| 132 | case 0x26: // timer B\r |
| 133 | if(ST_TB != v) {\r |
| 134 | ST_TB = v;\r |
| 135 | ST_TBC = (256-v)<<4;\r |
| 136 | ST_TBC *= 18;\r |
| 137 | ST_TBT = 0;\r |
| 138 | }\r |
| 139 | return 0;\r |
| 140 | case 0x27: /* mode, timer control */\r |
| 141 | set_timers( v );\r |
| 142 | break; // other side needs ST.mode for 3slot mode\r |
| 143 | case 0x2a: /* DAC data (YM2612) */\r |
| 144 | dacout = ((int)v - 0x80) << 6; /* level unknown (notaz: 8 seems to be too much) */\r |
| 145 | return 0;\r |
| 146 | case 0x2b: /* DAC Sel (YM2612) */\r |
| 147 | /* b7 = dac enable */\r |
| 148 | dacen = v & 0x80;\r |
| 149 | break; // other side has to know this\r |
| 150 | default:\r |
| 151 | break;\r |
| 152 | }\r |
| 153 | break;\r |
| 154 | }\r |
| 155 | break;\r |
| 156 | \r |
| 157 | case 2: /* address port 1 */\r |
| 158 | ST_address = v;\r |
| 159 | addr_A1 = 1;\r |
| 160 | //ret=0;\r |
| 161 | break;\r |
| 162 | \r |
| 163 | case 3: /* data port 1 */\r |
| 164 | if (addr_A1 != 1) {\r |
| 165 | return 0; /* verified on real YM2608 */\r |
| 166 | }\r |
| 167 | \r |
| 168 | addr = ST_address | 0x100;\r |
| 169 | REGS[addr] = v;\r |
| 170 | break;\r |
| 171 | }\r |
| 172 | \r |
| 173 | if(currentConfig.EmuOpt & 4) {\r |
| 174 | /* queue this write for 940 */\r |
| 175 | if (writebuff_ptr < 2047) {\r |
| 176 | if (shared_ctl->writebuffsel == 1) {\r |
| 177 | shared_ctl->writebuff0[writebuff_ptr++] = (a<<8)|v;\r |
| 178 | } else {\r |
| 179 | shared_ctl->writebuff1[writebuff_ptr++] = (a<<8)|v;\r |
| 180 | }\r |
| 181 | } else {\r |
| 182 | printf("warning: writebuff_ptr > 2047\n");\r |
| 183 | }\r |
| 184 | }\r |
| 185 | \r |
| 186 | return 0; // cause the engine to do updates once per frame only\r |
| 187 | }\r |
| 188 | \r |
| 189 | UINT8 YM2612Read_940(void)\r |
| 190 | {\r |
| 191 | return ST_status;\r |
| 192 | }\r |
| 193 | \r |
| 194 | \r |
| 195 | int YM2612PicoTick_940(int n)\r |
| 196 | {\r |
| 197 | //int ret = 0;\r |
| 198 | \r |
| 199 | // timer A\r |
| 200 | if(ST_mode & 0x01 && (ST_TAT+=64*n) >= ST_TAC) {\r |
| 201 | ST_TAT -= ST_TAC;\r |
| 202 | if(ST_mode & 0x04) ST_status |= 1;\r |
| 203 | // CSM mode total level latch and auto key on\r |
| 204 | /* FIXME\r |
| 205 | if(ST_mode & 0x80) {\r |
| 206 | CSMKeyControll( &(ym2612_940->CH[2]) ); // Vectorman2, etc.\r |
| 207 | ret = 1;\r |
| 208 | }\r |
| 209 | */\r |
| 210 | }\r |
| 211 | \r |
| 212 | // timer B\r |
| 213 | if(ST_mode & 0x02 && (ST_TBT+=64*n) >= ST_TBC) {\r |
| 214 | ST_TBT -= ST_TBC;\r |
| 215 | if(ST_mode & 0x08) ST_status |= 2;\r |
| 216 | }\r |
| 217 | \r |
| 218 | return 0;\r |
| 219 | }\r |
| 220 | \r |
| 221 | \r |
| 222 | static void wait_busy_940(void)\r |
| 223 | {\r |
| 224 | int i;\r |
| 225 | #if 0\r |
| 226 | printf("940 busy, entering wait loop.. (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);\r |
| 227 | for (i = 0; i < 8; i++)\r |
| 228 | printf("%i ", shared_ctl->vstarts[i]);\r |
| 229 | printf(")\n");\r |
| 230 | \r |
| 231 | for (i = 0; shared_ctl->busy; i++)\r |
| 232 | {\r |
| 233 | spend_cycles(1024); /* needs tuning */\r |
| 234 | }\r |
| 235 | printf("wait iterations: %i\n", i);\r |
| 236 | #else\r |
| 237 | for (i = 0; shared_ctl->busy && i < 0x10000; i++)\r |
| 238 | spend_cycles(4*1024);\r |
| 239 | if (i < 0x10000) return;\r |
| 240 | \r |
| 241 | /* 940 crashed */\r |
| 242 | printf("940 crashed (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);\r |
| 243 | for (i = 0; i < 8; i++)\r |
| 244 | printf("%i ", shared_ctl->vstarts[i]);\r |
| 245 | printf(")\n");\r |
| 246 | strcpy(menuErrorMsg, "940 crashed.");\r |
| 247 | engineState = PGS_Menu;\r |
| 248 | crashed_940 = 1;\r |
| 249 | #endif\r |
| 250 | }\r |
| 251 | \r |
| 252 | \r |
| 253 | static void add_job_940(int job)\r |
| 254 | {\r |
| 255 | shared_ctl->job = job;\r |
| 256 | shared_ctl->busy = 1;\r |
| 257 | gp2x_memregs[0x3B3E>>1] = 0xffff; // cause an IRQ for 940\r |
| 258 | }\r |
| 259 | \r |
| 260 | \r |
| 261 | void YM2612PicoStateLoad_940(void)\r |
| 262 | {\r |
| 263 | int i, old_A1 = addr_A1;\r |
| 264 | \r |
| 265 | if (shared_ctl->busy) wait_busy_940();\r |
| 266 | \r |
| 267 | // feed all the registers and update internal state\r |
| 268 | for(i = 0; i < 0x100; i++) {\r |
| 269 | YM2612Write_940(0, i);\r |
| 270 | YM2612Write_940(1, REGS[i]);\r |
| 271 | }\r |
| 272 | for(i = 0; i < 0x100; i++) {\r |
| 273 | YM2612Write_940(2, i);\r |
| 274 | YM2612Write_940(3, REGS[i|0x100]);\r |
| 275 | }\r |
| 276 | \r |
| 277 | addr_A1 = old_A1;\r |
| 278 | \r |
| 279 | add_job_940(JOB940_PICOSTATELOAD);\r |
| 280 | }\r |
| 281 | \r |
| 282 | \r |
| 283 | static void internal_reset(void)\r |
| 284 | {\r |
| 285 | writebuff_ptr = 0;\r |
| 286 | ST_mode = 0;\r |
| 287 | ST_status = 0; /* normal mode */\r |
| 288 | ST_TA = 0;\r |
| 289 | ST_TAC = 0;\r |
| 290 | ST_TB = 0;\r |
| 291 | ST_TBC = 0;\r |
| 292 | dacen = 0;\r |
| 293 | }\r |
| 294 | \r |
| 295 | \r |
| 296 | extern char **g_argv;\r |
| 297 | \r |
| 298 | /* none of the functions in this file should be called before this one */\r |
| 299 | void YM2612Init_940(int baseclock, int rate)\r |
| 300 | {\r |
| 301 | printf("YM2612Init_940()\n");\r |
| 302 | //printf("sizeof(*shared_data): %i (%x)\n", sizeof(*shared_data), sizeof(*shared_data));\r |
| 303 | //printf("sizeof(*shared_ctl): %i (%x)\n", sizeof(*shared_ctl), sizeof(*shared_ctl));\r |
| 304 | \r |
| 305 | Reset940(1);\r |
| 306 | Pause940(1);\r |
| 307 | \r |
| 308 | gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r |
| 309 | gp2x_memregs[0x3B42>>1] = 0xffff; // enable DUALCPU interrupts for 940\r |
| 310 | \r |
| 311 | gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r |
| 312 | \r |
| 313 | if (shared_mem == NULL)\r |
| 314 | {\r |
| 315 | shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x3000000);\r |
| 316 | if(shared_mem == MAP_FAILED)\r |
| 317 | {\r |
| 318 | printf("mmap(shared_data) failed with %i\n", errno);\r |
| 319 | exit(1);\r |
| 320 | }\r |
| 321 | shared_data = (_940_data_t *) (shared_mem+0x100000);\r |
| 322 | /* this area must not get buffered on either side */\r |
| 323 | shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r |
| 324 | crashed_940 = 1;\r |
| 325 | }\r |
| 326 | \r |
| 327 | if (crashed_940)\r |
| 328 | {\r |
| 329 | unsigned char ucData[1024];\r |
| 330 | int nRead, i, nLen = 0;\r |
| 331 | char binpath[1024];\r |
| 332 | FILE *fp;\r |
| 333 | \r |
| 334 | strncpy(binpath, g_argv[0], 1023);\r |
| 335 | binpath[1023] = 0;\r |
| 336 | for (i = strlen(binpath); i > 0; i--)\r |
| 337 | if (binpath[i] == '/') { binpath[i] = 0; break; }\r |
| 338 | strcat(binpath, "/code940.bin");\r |
| 339 | \r |
| 340 | fp = fopen(binpath, "rb");\r |
| 341 | if(!fp)\r |
| 342 | {\r |
| 343 | memset(gp2x_screen, 0, 320*240);\r |
| 344 | gp2x_text_out8(10, 100, "failed to open required file:");\r |
| 345 | gp2x_text_out8(10, 110, "code940.bin");\r |
| 346 | gp2x_video_flip();\r |
| 347 | printf("failed to open %s\n", binpath);\r |
| 348 | exit(1);\r |
| 349 | }\r |
| 350 | \r |
| 351 | while(1)\r |
| 352 | {\r |
| 353 | nRead = fread(ucData, 1, 1024, fp);\r |
| 354 | if(nRead <= 0)\r |
| 355 | break;\r |
| 356 | memcpy(shared_mem + nLen, ucData, nRead);\r |
| 357 | nLen += nRead;\r |
| 358 | }\r |
| 359 | fclose(fp);\r |
| 360 | crashed_940 = 0;\r |
| 361 | }\r |
| 362 | \r |
| 363 | memset(shared_data, 0, sizeof(*shared_data));\r |
| 364 | memset(shared_ctl, 0, sizeof(*shared_ctl));\r |
| 365 | \r |
| 366 | REGS = YM2612GetRegs();\r |
| 367 | \r |
| 368 | ym2612_dacen = &dacen;\r |
| 369 | ym2612_dacout = &dacout;\r |
| 370 | \r |
| 371 | internal_reset();\r |
| 372 | \r |
| 373 | /* now cause 940 to init it's ym2612 stuff */\r |
| 374 | shared_ctl->baseclock = baseclock;\r |
| 375 | shared_ctl->rate = rate;\r |
| 376 | shared_ctl->job = JOB940_YM2612INIT;\r |
| 377 | shared_ctl->busy = 1;\r |
| 378 | \r |
| 379 | /* start the 940 */\r |
| 380 | Reset940(0);\r |
| 381 | Pause940(0);\r |
| 382 | \r |
| 383 | // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r |
| 384 | }\r |
| 385 | \r |
| 386 | \r |
| 387 | void YM2612ResetChip_940(void)\r |
| 388 | {\r |
| 389 | printf("YM2612ResetChip_940()\n");\r |
| 390 | if (shared_data == NULL) {\r |
| 391 | printf("YM2612ResetChip_940: reset before init?\n");\r |
| 392 | return;\r |
| 393 | }\r |
| 394 | \r |
| 395 | if (shared_ctl->busy) wait_busy_940();\r |
| 396 | \r |
| 397 | internal_reset();\r |
| 398 | \r |
| 399 | add_job_940(JOB940_YM2612RESETCHIP);\r |
| 400 | }\r |
| 401 | \r |
| 402 | \r |
| 403 | void YM2612UpdateOne_940(short *buffer, int length, int stereo)\r |
| 404 | {\r |
| 405 | int i, *mix_buffer = shared_data->mix_buffer;\r |
| 406 | \r |
| 407 | //printf("YM2612UpdateOne_940()\n");\r |
| 408 | if (shared_ctl->busy) wait_busy_940();\r |
| 409 | \r |
| 410 | //printf("940 (cnt: %i, wc: %i, ve: ", shared_ctl->loopc, shared_ctl->waitc);\r |
| 411 | //for (i = 0; i < 8; i++)\r |
| 412 | // printf("%i ", shared_ctl->vstarts[i]);\r |
| 413 | //printf(")\n");\r |
| 414 | \r |
| 415 | /* mix data from previous go */\r |
| 416 | if (stereo) {\r |
| 417 | int *mb = mix_buffer;\r |
| 418 | for (i = length; i > 0; i--) {\r |
| 419 | int l, r;\r |
| 420 | l = r = *buffer;\r |
| 421 | l += *mb++, r += *mb++;\r |
| 422 | Limit( l, MAXOUT, MINOUT );\r |
| 423 | Limit( r, MAXOUT, MINOUT );\r |
| 424 | *buffer++ = l; *buffer++ = r;\r |
| 425 | }\r |
| 426 | } else {\r |
| 427 | for (i = 0; i < length; i++) {\r |
| 428 | int l = mix_buffer[i];\r |
| 429 | l += buffer[i];\r |
| 430 | Limit( l, MAXOUT, MINOUT );\r |
| 431 | buffer[i] = l;\r |
| 432 | }\r |
| 433 | }\r |
| 434 | \r |
| 435 | //printf("new writes: %i\n", writebuff_ptr);\r |
| 436 | if (shared_ctl->writebuffsel == 1) {\r |
| 437 | shared_ctl->writebuff0[writebuff_ptr] = 0xffff;\r |
| 438 | } else {\r |
| 439 | shared_ctl->writebuff1[writebuff_ptr] = 0xffff;\r |
| 440 | }\r |
| 441 | writebuff_ptr = 0;\r |
| 442 | \r |
| 443 | /* give 940 another job */\r |
| 444 | shared_ctl->writebuffsel ^= 1;\r |
| 445 | shared_ctl->length = length;\r |
| 446 | shared_ctl->stereo = stereo;\r |
| 447 | add_job_940(JOB940_YM2612UPDATEONE);\r |
| 448 | //spend_cycles(512);\r |
| 449 | //printf("SRCPND: %08lx, INTMODE: %08lx, INTMASK: %08lx, INTPEND: %08lx\n",\r |
| 450 | // gp2x_memregl[0x4500>>2], gp2x_memregl[0x4504>>2], gp2x_memregl[0x4508>>2], gp2x_memregl[0x4510>>2]);\r |
| 451 | }\r |