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minor game_def.cfg update
[picodrive.git] / platform / gp2x / 940ctl.c
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1// Code for communication with ARM940 and control of it.\r
2// (c) Copyright 2007, Grazvydas "notaz" Ignotas\r
3\r
4#include <stdio.h>\r
5#include <stdlib.h>\r
6#include <string.h>\r
7#include <unistd.h>\r
8#include <sys/mman.h>\r
9#include <sys/ioctl.h>\r
10#include <fcntl.h>\r
11#include <errno.h>\r
12\r
13#include "code940/940shared.h"\r
14#include "gp2x.h"\r
15#include "emu.h"\r
16#include "menu.h"\r
17#include "../common/mp3.h"\r
18#include "../common/arm_utils.h"\r
19#include "../common/menu.h"\r
20#include "../common/emu.h"\r
21#include "../../Pico/PicoInt.h"\r
22#include "../../Pico/sound/ym2612.h"\r
23#include "../../Pico/sound/mix.h"\r
24\r
25/* we will need some gp2x internals here */\r
26extern volatile unsigned short *gp2x_memregs; /* from minimal library rlyeh */\r
27extern volatile unsigned long *gp2x_memregl;\r
28\r
29extern int reset_timing;\r
30static unsigned char *shared_mem = 0;\r
31static _940_data_t *shared_data = 0;\r
32_940_ctl_t *shared_ctl = 0;\r
33unsigned char *mp3_mem = 0;\r
34\r
35#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
36#define CODE940_FILE "pico940_v3.bin"\r
37\r
38int crashed_940 = 0;\r
39\r
40static FILE *loaded_mp3 = 0;\r
41\r
42/***********************************************************/\r
43\r
44#define MAXOUT (+32767)\r
45#define MINOUT (-32768)\r
46\r
47/* limitter */\r
48#define Limit(val, max,min) { \\r
49 if ( val > max ) val = max; \\r
50 else if ( val < min ) val = min; \\r
51}\r
52\r
53/* these will be managed locally on our side */\r
54static UINT8 ST_address; /* address register */\r
55static INT32 addr_A1; /* address line A1 */\r
56\r
57static int writebuff_ptr = 0;\r
58\r
59\r
60/* YM2612 write */\r
61/* a = address */\r
62/* v = value */\r
63/* returns 1 if sample affecting state changed */\r
64int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
65{\r
66 int upd = 1; /* the write affects sample generation */\r
67\r
68 a &= 3;\r
69\r
70 //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
71\r
72 switch (a)\r
73 {\r
74 case 0: /* address port 0 */\r
75 if (addr_A1 == 0 && ST_address == v)\r
76 return 0; /* address already selected, don't send this command to 940 */\r
77 ST_address = v;\r
78 addr_A1 = 0;\r
79 /* don't send DAC or timer related address changes to 940 */\r
80 if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r
81 return 0;\r
82 upd = 0;\r
83 break;\r
84\r
85 case 2: /* address port 1 */\r
86 if (addr_A1 == 1 && ST_address == v)\r
87 return 0;\r
88 ST_address = v;\r
89 addr_A1 = 1;\r
90 upd = 0;\r
91 break;\r
92 }\r
93\r
94 //printf("ym pass\n");\r
95\r
96 if (currentConfig.EmuOpt & 4)\r
97 {\r
98 UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
99\r
100 /* detect rapid ym updates */\r
101 if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
102 {\r
103 int mid = Pico.m.pal ? 68 : 93;\r
104 if (scanline > mid) {\r
105 //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
106 writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
107 writebuff_ptr |= 0x80000000;\r
108 //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
109 }\r
110 }\r
111\r
112 /* queue this write for 940 */\r
113 if ((writebuff_ptr&0xffff) < 2047) {\r
114 writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
115 } else {\r
116 printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
117 }\r
118 }\r
119\r
120 return 0; // cause the engine to do updates once per frame only\r
121}\r
122\r
123\r
124#define CHECK_BUSY(job) \\r
125 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
126\r
127static void wait_busy_940(int job)\r
128{\r
129 int i;\r
130\r
131 job--;\r
132 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
133 spend_cycles(8*1024); // tested to be best for mp3 dec\r
134 if (i < 0x10000) return;\r
135\r
136 /* 940 crashed */\r
137 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
138 for (i = 0; i < 8; i++)\r
139 printf("%i ", shared_ctl->vstarts[i]);\r
140 printf(")\n");\r
141 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
142 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
143 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
144 printf("trying to interrupt..\n");\r
145 gp2x_memregs[0x3B3E>>1] = 0xffff;\r
146 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
147 spend_cycles(8*1024);\r
148 printf("i = 0x%x\n", i);\r
149 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
150 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
151 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
152\r
153 strcpy(menuErrorMsg, "940 crashed, too much overclock?");\r
154 engineState = PGS_Menu;\r
155 crashed_940 = 1;\r
156}\r
157\r
158\r
159static void add_job_940(int job)\r
160{\r
161 if (job <= 0 || job > 16) {\r
162 printf("add_job_940: bad job: %i\n", job);\r
163 return;\r
164 }\r
165\r
166 // generate interrupt for this job\r
167 job--;\r
168 gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
169\r
170// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
171}\r
172\r
173\r
174void YM2612PicoStateLoad_940(void)\r
175{\r
176 UINT8 *REGS = YM2612GetRegs();\r
177\r
178 /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
179 add_job_940(JOB940_PICOSTATELOAD);\r
180 if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
181\r
182 writebuff_ptr = 0;\r
183 addr_A1 = *(INT32 *) (REGS + 0x200);\r
184}\r
185\r
186void YM2612PicoStateSave2_940(int tat, int tbt)\r
187{\r
188 UINT8 *ym_remote_regs, *ym_local_regs;\r
189 add_job_940(JOB940_PICOSTATESAVE2);\r
190 if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
191\r
192 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
193 ym_local_regs = YM2612GetRegs();\r
194 if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r
195 printf("code940 didn't return valid save data\n");\r
196 return;\r
197 }\r
198\r
199 /* copy addin data only */\r
200 memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
201 memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
202 memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
203 memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
204 *(INT32 *)(ym_local_regs + 0x108) = tat;\r
205 *(INT32 *)(ym_local_regs + 0x10c) = tbt;\r
206}\r
207\r
208int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r
209{\r
210 UINT8 *ym_remote_regs, *ym_local_regs;\r
211 ym_local_regs = YM2612GetRegs();\r
212 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
213\r
214 if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r
215 return -1;\r
216\r
217 *tat = *(INT32 *)(ym_local_regs + 0x108);\r
218 *tbt = *(INT32 *)(ym_local_regs + 0x10c);\r
219\r
220 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
221\r
222 /* flush writes */\r
223 if (shared_ctl->writebuffsel == 1) {\r
224 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
225 } else {\r
226 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
227 }\r
228 shared_ctl->writebuffsel ^= 1;\r
229 writebuff_ptr = 0;\r
230 add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
231 if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
232\r
233 memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
234\r
235 add_job_940(JOB940_PICOSTATELOAD2);\r
236 if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
237\r
238 return 0;\r
239}\r
240\r
241\r
242static void internal_reset(void)\r
243{\r
244 writebuff_ptr = 0;\r
245 ST_address = addr_A1 = -1;\r
246}\r
247\r
248\r
249/* this must be called after mmu hack, the allocated regions must not get cached */\r
250void sharedmem_init(void)\r
251{\r
252 if (shared_mem != NULL) return;\r
253\r
254 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
255 if (shared_mem == MAP_FAILED)\r
256 {\r
257 printf("mmap(shared_data) failed with %i\n", errno);\r
258 exit(1);\r
259 }\r
260 shared_data = (_940_data_t *) (shared_mem+0x100000);\r
261 /* this area must not get buffered on either side */\r
262 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
263 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
264 if (mp3_mem == MAP_FAILED)\r
265 {\r
266 printf("mmap(mp3_mem) failed with %i\n", errno);\r
267 exit(1);\r
268 }\r
269 crashed_940 = 1;\r
270}\r
271\r
272\r
273void sharedmem_deinit(void)\r
274{\r
275 munmap(shared_mem, 0x210000);\r
276 munmap(mp3_mem, MP3_SIZE_MAX);\r
277 shared_mem = mp3_mem = NULL;\r
278 shared_data = NULL;\r
279 shared_ctl = NULL;\r
280}\r
281\r
282\r
283extern char **g_argv;\r
284\r
285void YM2612Init_940(int baseclock, int rate)\r
286{\r
287 printf("YM2612Init_940()\n");\r
288 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
289\r
290 Reset940(1, 2);\r
291 Pause940(1);\r
292\r
293 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
294 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
295\r
296 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
297 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
298\r
299\r
300 if (crashed_940)\r
301 {\r
302 unsigned char ucData[1024];\r
303 int nRead, i, nLen = 0;\r
304 char binpath[1024];\r
305 FILE *fp;\r
306\r
307 strncpy(binpath, g_argv[0], 1023);\r
308 binpath[1023] = 0;\r
309 for (i = strlen(binpath); i > 0; i--)\r
310 if (binpath[i] == '/') { binpath[i] = 0; break; }\r
311 strcat(binpath, "/" CODE940_FILE);\r
312\r
313 fp = fopen(binpath, "rb");\r
314 if(!fp)\r
315 {\r
316 memset(gp2x_screen, 0, 320*240*2);\r
317 text_out16(10, 100, "failed to open required file:");\r
318 text_out16(10, 110, CODE940_FILE);\r
319 gp2x_video_flip2();\r
320 printf("failed to open %s\n", binpath);\r
321 exit(1);\r
322 }\r
323\r
324 while(1)\r
325 {\r
326 nRead = fread(ucData, 1, 1024, fp);\r
327 if(nRead <= 0)\r
328 break;\r
329 memcpy(shared_mem + nLen, ucData, nRead);\r
330 nLen += nRead;\r
331 }\r
332 fclose(fp);\r
333 crashed_940 = 0;\r
334 }\r
335\r
336 memset(shared_data, 0, sizeof(*shared_data));\r
337 memset(shared_ctl, 0, sizeof(*shared_ctl));\r
338\r
339 /* cause local ym2612 to init REGS */\r
340 YM2612Init_(baseclock, rate);\r
341\r
342 internal_reset();\r
343\r
344 loaded_mp3 = 0;\r
345\r
346 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
347 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
348 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
349\r
350 /* start the 940 */\r
351 Reset940(0, 2);\r
352 Pause940(0);\r
353\r
354 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
355\r
356 /* now cause 940 to init it's ym2612 stuff */\r
357 shared_ctl->baseclock = baseclock;\r
358 shared_ctl->rate = rate;\r
359 add_job_940(JOB940_INITALL);\r
360}\r
361\r
362\r
363void YM2612ResetChip_940(void)\r
364{\r
365 //printf("YM2612ResetChip_940()\n");\r
366 if (shared_data == NULL) {\r
367 printf("YM2612ResetChip_940: reset before init?\n");\r
368 return;\r
369 }\r
370\r
371 YM2612ResetChip_();\r
372 internal_reset();\r
373\r
374 add_job_940(JOB940_YM2612RESETCHIP);\r
375}\r
376\r
377\r
378int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
379{\r
380 int *ym_buf = shared_data->ym_buffer;\r
381 int ym_active_chs;\r
382\r
383 //printf("YM2612UpdateOne_940()\n");\r
384\r
385 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
386\r
387 ym_active_chs = shared_ctl->ym_active_chs;\r
388\r
389 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
390 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
391 else memset32(buffer, 0, length<<stereo);\r
392\r
393 if (shared_ctl->writebuffsel == 1) {\r
394 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
395 } else {\r
396 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
397 }\r
398 writebuff_ptr = 0;\r
399\r
400 /* predict sample counter for next frame */\r
401 if (PsndLen_exc_add) {\r
402 length = PsndLen;\r
403 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r
404 }\r
405\r
406 /* give 940 ym job */\r
407 shared_ctl->writebuffsel ^= 1;\r
408 shared_ctl->length = length;\r
409 shared_ctl->stereo = stereo;\r
410\r
411 add_job_940(JOB940_YM2612UPDATEONE);\r
412\r
413 return ym_active_chs;\r
414}\r
415\r
416\r
417static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
418static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
419\r
420void mp3_update(int *buffer, int length, int stereo)\r
421{\r
422 int length_mp3;\r
423 int cdda_on;\r
424\r
425 // playback was started, track not ended\r
426 cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
427\r
428 if (!cdda_on) return;\r
429\r
430 if (!(PicoOpt&0x200)) {\r
431 mp3_update_local(buffer, length, stereo);\r
432 return;\r
433 }\r
434\r
435 length_mp3 = length;\r
436 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
437 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
438\r
439 /* do we have to wait? */\r
440 if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
441 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
442 mp3_job_started = 0;\r
443 mp3_samples_ready += 1152;\r
444 }\r
445\r
446 /* mix mp3 data, only stereo */\r
447 if (mp3_samples_ready >= length_mp3)\r
448 {\r
449 int shr = 0;\r
450 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
451 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
452 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
453\r
454 if (1152 - mp3_buffer_offs >= length_mp3) {\r
455 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
456\r
457 mp3_buffer_offs += length_mp3;\r
458 } else {\r
459 // collect samples from both buffers..\r
460 int left = 1152 - mp3_buffer_offs;\r
461 if (mp3_play_bufsel == 0)\r
462 {\r
463 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
464 mp3_buffer_offs = length_mp3 - left;\r
465 mp3_play_bufsel = 1;\r
466 } else {\r
467 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
468 mp3_buffer_offs = length_mp3 - left;\r
469 mix_samples(buffer + ((left>>shr)<<1),\r
470 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
471 mp3_play_bufsel = 0;\r
472 }\r
473 }\r
474 mp3_samples_ready -= length_mp3;\r
475 }\r
476\r
477 // ask to decode more if we already can\r
478 if (!mp3_job_started)\r
479 {\r
480 mp3_job_started = 1;\r
481 shared_ctl->mp3_buffsel ^= 1;\r
482 add_job_940(JOB940_MP3DECODE);\r
483 }\r
484}\r
485\r
486\r
487/***********************************************************/\r
488\r
489void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
490{\r
491 int byte_offs = 0;\r
492\r
493 if (!(PicoOpt&0x800)) { // cdda disabled?\r
494 return;\r
495 }\r
496\r
497 if (loaded_mp3 != f)\r
498 {\r
499 if (PicoMessage != NULL)\r
500 {\r
501 fseek(f, 0, SEEK_END);\r
502 if (ftell(f) > 2*1024*1024)\r
503 PicoMessage("Loading MP3...");\r
504 }\r
505 fseek(f, 0, SEEK_SET);\r
506 fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
507 if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
508 shared_ctl->mp3_len = ftell(f);\r
509 loaded_mp3 = f;\r
510\r
511 if (PicoOpt & POPT_EXT_FM) {\r
512 // as we are going to change 940's cacheable area, we must invalidate it's cache..\r
513 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
514 add_job_940(JOB940_INVALIDATE_DCACHE);\r
515 }\r
516 reset_timing = 1;\r
517 }\r
518\r
519 // seek..\r
520 if (pos) {\r
521 byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
522 byte_offs *= pos;\r
523 byte_offs >>= 6;\r
524 }\r
525 printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
526\r
527 shared_ctl->mp3_offs = byte_offs;\r
528\r
529 // reset buffer pointers and stuff..\r
530 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
531 mp3_job_started = 0;\r
532 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
533\r
534 if (PicoOpt & POPT_EXT_FM)\r
535 {\r
536 add_job_940(JOB940_MP3RESET);\r
537 if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
538 }\r
539 else\r
540 mp3_start_local();\r
541}\r
542\r
543\r
544int mp3_get_offset(void)\r
545{\r
546 unsigned int offs1024 = 0;\r
547 int cdda_on;\r
548\r
549 cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
550 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
551\r
552 if (cdda_on) {\r
553 offs1024 = shared_ctl->mp3_offs << 7;\r
554 offs1024 /= shared_ctl->mp3_len >> 3;\r
555 }\r
556 printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
557\r
558 return offs1024;\r
559}\r
560\r
561\r
fast MegaDrive/MegaCD/32X emulator