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restore defaults function + some refactoring
[libpicofe.git] / 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 "soc_mmsp2.h"\r
15#include "soc.h"\r
16#include "../common/mp3.h"\r
17#include "../common/arm_utils.h"\r
18#include "../common/menu.h"\r
19#include "../common/emu.h"\r
20#include "../../pico/pico_int.h"\r
21#include "../../pico/sound/ym2612.h"\r
22#include "../../pico/sound/mix.h"\r
23\r
24static unsigned char *shared_mem = 0;\r
25static _940_data_t *shared_data = 0;\r
26_940_ctl_t *shared_ctl = 0;\r
27unsigned char *mp3_mem = 0;\r
28\r
29#define MP3_SIZE_MAX (0x400000 + 0x800000) // 12M\r
30#define CODE940_FILE "pico940_v3.bin"\r
31\r
32int crashed_940 = 0;\r
33\r
34static FILE *loaded_mp3 = 0;\r
35\r
36/***********************************************************/\r
37\r
38#define MAXOUT (+32767)\r
39#define MINOUT (-32768)\r
40\r
41/* limitter */\r
42#define Limit(val, max,min) { \\r
43 if ( val > max ) val = max; \\r
44 else if ( val < min ) val = min; \\r
45}\r
46\r
47/* these will be managed locally on our side */\r
48static UINT8 ST_address; /* address register */\r
49static INT32 addr_A1; /* address line A1 */\r
50\r
51static int writebuff_ptr = 0;\r
52\r
53\r
54/* YM2612 write */\r
55/* a = address */\r
56/* v = value */\r
57/* returns 1 if sample affecting state changed */\r
58int YM2612Write_940(unsigned int a, unsigned int v, int scanline)\r
59{\r
60 int upd = 1; /* the write affects sample generation */\r
61\r
62 a &= 3;\r
63\r
64 //printf("%05i:%03i: ym w ([%i] %02x)\n", Pico.m.frame_count, Pico.m.scanline, a, v);\r
65\r
66 switch (a)\r
67 {\r
68 case 0: /* address port 0 */\r
69 if (addr_A1 == 0 && ST_address == v)\r
70 return 0; /* address already selected, don't send this command to 940 */\r
71 ST_address = v;\r
72 addr_A1 = 0;\r
73 /* don't send DAC or timer related address changes to 940 */\r
74 if (v == 0x24 || v == 0x25 || v == 0x26 || v == 0x2a)\r
75 return 0;\r
76 upd = 0;\r
77 break;\r
78\r
79 case 2: /* address port 1 */\r
80 if (addr_A1 == 1 && ST_address == v)\r
81 return 0;\r
82 ST_address = v;\r
83 addr_A1 = 1;\r
84 upd = 0;\r
85 break;\r
86 }\r
87\r
88 //printf("ym pass\n");\r
89\r
90 if (currentConfig.EmuOpt & 4)\r
91 {\r
92 UINT16 *writebuff = shared_ctl->writebuffsel ? shared_ctl->writebuff0 : shared_ctl->writebuff1;\r
93\r
94 /* detect rapid ym updates */\r
95 if (upd && !(writebuff_ptr & 0x80000000) && scanline < 224)\r
96 {\r
97 int mid = Pico.m.pal ? 68 : 93;\r
98 if (scanline > mid) {\r
99 //printf("%05i:%03i: rapid ym\n", Pico.m.frame_count, scanline);\r
100 writebuff[writebuff_ptr++ & 0xffff] = 0xfffe;\r
101 writebuff_ptr |= 0x80000000;\r
102 //printf("%05i:%03i: ym w ([%02x] %02x, upd=%i)\n", Pico.m.frame_count, scanline, addr, v, upd);\r
103 }\r
104 }\r
105\r
106 /* queue this write for 940 */\r
107 if ((writebuff_ptr&0xffff) < 2047) {\r
108 writebuff[writebuff_ptr++ & 0xffff] = (a<<8)|v;\r
109 } else {\r
110 printf("warning: writebuff_ptr > 2047 ([%i] %02x)\n", a, v);\r
111 }\r
112 }\r
113\r
114 return 0; // cause the engine to do updates once per frame only\r
115}\r
116\r
117\r
118#define CHECK_BUSY(job) \\r
119 (gp2x_memregs[0x3b46>>1] & (1<<(job-1)))\r
120\r
121static void wait_busy_940(int job)\r
122{\r
123 int i;\r
124\r
125 job--;\r
126 for (i = 0; (gp2x_memregs[0x3b46>>1] & (1<<job)) && i < 0x10000; i++)\r
127 spend_cycles(8*1024); // tested to be best for mp3 dec\r
128 if (i < 0x10000) return;\r
129\r
130 /* 940 crashed */\r
131 printf("940 crashed (cnt: %i, ve: ", shared_ctl->loopc);\r
132 for (i = 0; i < 8; i++)\r
133 printf("%i ", shared_ctl->vstarts[i]);\r
134 printf(")\n");\r
135 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
136 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
137 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
138 printf("trying to interrupt..\n");\r
139 gp2x_memregs[0x3B3E>>1] = 0xffff;\r
140 for (i = 0; gp2x_memregs[0x3b46>>1] && i < 0x10000; i++)\r
141 spend_cycles(8*1024);\r
142 printf("i = 0x%x\n", i);\r
143 printf("irq pending flags: DUALCPU %04x, SRCPND %08lx (see 26), INTPND %08lx\n",\r
144 gp2x_memregs[0x3b46>>1], gp2x_memregl[0x4500>>2], gp2x_memregl[0x4510>>2]);\r
145 printf("last lr: %08x, lastjob: %i\n", shared_ctl->last_lr, shared_ctl->lastjob);\r
146\r
147 me_update_msg("940 crashed, too much overclock?");\r
148 engineState = PGS_Menu;\r
149 crashed_940 = 1;\r
150}\r
151\r
152\r
153static void add_job_940(int job)\r
154{\r
155 if (job <= 0 || job > 16) {\r
156 printf("add_job_940: bad job: %i\n", job);\r
157 return;\r
158 }\r
159\r
160 // generate interrupt for this job\r
161 job--;\r
162 gp2x_memregs[(0x3B20+job*2)>>1] = 1;\r
163\r
164// printf("added %i, pending %04x\n", job+1, gp2x_memregs[0x3b46>>1]);\r
165}\r
166\r
167\r
168void YM2612PicoStateLoad_940(void)\r
169{\r
170 UINT8 *REGS = YM2612GetRegs();\r
171\r
172 /* make sure JOB940_PICOSTATELOAD gets done before next JOB940_YM2612UPDATEONE */\r
173 add_job_940(JOB940_PICOSTATELOAD);\r
174 if (CHECK_BUSY(JOB940_PICOSTATELOAD)) wait_busy_940(JOB940_PICOSTATELOAD);\r
175\r
176 writebuff_ptr = 0;\r
177 addr_A1 = *(INT32 *) (REGS + 0x200);\r
178}\r
179\r
180void YM2612PicoStateSave2_940(int tat, int tbt)\r
181{\r
182 UINT8 *ym_remote_regs, *ym_local_regs;\r
183 add_job_940(JOB940_PICOSTATESAVE2);\r
184 if (CHECK_BUSY(JOB940_PICOSTATESAVE2)) wait_busy_940(JOB940_PICOSTATESAVE2);\r
185\r
186 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
187 ym_local_regs = YM2612GetRegs();\r
188 if (*(UINT32 *)(ym_remote_regs + 0x100) != 0x41534d59) {\r
189 printf("code940 didn't return valid save data\n");\r
190 return;\r
191 }\r
192\r
193 /* copy addin data only */\r
194 memcpy(ym_local_regs, ym_remote_regs, 0x20);\r
195 memcpy(ym_local_regs + 0x100, ym_remote_regs + 0x100, 0x30);\r
196 memcpy(ym_local_regs + 0x0b8, ym_remote_regs + 0x0b8, 0x48);\r
197 memcpy(ym_local_regs + 0x1b8, ym_remote_regs + 0x1b8, 0x48);\r
198 *(INT32 *)(ym_local_regs + 0x108) = tat;\r
199 *(INT32 *)(ym_local_regs + 0x10c) = tbt;\r
200}\r
201\r
202int YM2612PicoStateLoad2_940(int *tat, int *tbt)\r
203{\r
204 UINT8 *ym_remote_regs, *ym_local_regs;\r
205 ym_local_regs = YM2612GetRegs();\r
206 ym_remote_regs = (UINT8 *) shared_ctl->writebuff0;\r
207\r
208 if (*(UINT32 *)(ym_local_regs + 0x100) != 0x41534d59)\r
209 return -1;\r
210\r
211 *tat = *(INT32 *)(ym_local_regs + 0x108);\r
212 *tbt = *(INT32 *)(ym_local_regs + 0x10c);\r
213\r
214 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
215\r
216 /* flush writes */\r
217 if (shared_ctl->writebuffsel == 1) {\r
218 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
219 } else {\r
220 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
221 }\r
222 shared_ctl->writebuffsel ^= 1;\r
223 writebuff_ptr = 0;\r
224 add_job_940(JOB940_PICOSTATELOAD2_PREP);\r
225 if (CHECK_BUSY(JOB940_PICOSTATELOAD2_PREP)) wait_busy_940(JOB940_PICOSTATELOAD2_PREP);\r
226\r
227 memcpy(ym_remote_regs, ym_local_regs, 0x200);\r
228\r
229 add_job_940(JOB940_PICOSTATELOAD2);\r
230 if (CHECK_BUSY(JOB940_PICOSTATELOAD2)) wait_busy_940(JOB940_PICOSTATELOAD2);\r
231\r
232 return 0;\r
233}\r
234\r
235\r
236static void internal_reset(void)\r
237{\r
238 writebuff_ptr = 0;\r
239 ST_address = addr_A1 = -1;\r
240}\r
241\r
242\r
243/* this must be called after mmu hack, the allocated regions must not get cached */\r
244void sharedmem940_init(void)\r
245{\r
246 if (shared_mem != NULL) return;\r
247\r
248 shared_mem = (unsigned char *) mmap(0, 0x210000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2000000);\r
249 if (shared_mem == MAP_FAILED)\r
250 {\r
251 printf("mmap(shared_data) failed with %i\n", errno);\r
252 exit(1);\r
253 }\r
254 shared_data = (_940_data_t *) (shared_mem+0x100000);\r
255 /* this area must not get buffered on either side */\r
256 shared_ctl = (_940_ctl_t *) (shared_mem+0x200000);\r
257 mp3_mem = (unsigned char *) mmap(0, MP3_SIZE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0x2400000);\r
258 if (mp3_mem == MAP_FAILED)\r
259 {\r
260 printf("mmap(mp3_mem) failed with %i\n", errno);\r
261 exit(1);\r
262 }\r
263 crashed_940 = 1;\r
264}\r
265\r
266\r
267void sharedmem940_finish(void)\r
268{\r
269 munmap(shared_mem, 0x210000);\r
270 munmap(mp3_mem, MP3_SIZE_MAX);\r
271 shared_mem = mp3_mem = NULL;\r
272 shared_data = NULL;\r
273 shared_ctl = NULL;\r
274}\r
275\r
276\r
277extern char **g_argv;\r
278\r
279void YM2612Init_940(int baseclock, int rate)\r
280{\r
281 printf("YM2612Init_940()\n");\r
282 printf("Mem usage: shared_data: %i, shared_ctl: %i\n", sizeof(*shared_data), sizeof(*shared_ctl));\r
283\r
284 reset940(1, 2);\r
285 pause940(1);\r
286\r
287 gp2x_memregs[0x3B40>>1] = 0; // disable DUALCPU interrupts for 920\r
288 gp2x_memregs[0x3B42>>1] = 1; // enable DUALCPU interrupts for 940\r
289\r
290 gp2x_memregl[0x4504>>2] = 0; // make sure no FIQs will be generated\r
291 gp2x_memregl[0x4508>>2] = ~(1<<26); // unmask DUALCPU ints in the undocumented 940's interrupt controller\r
292\r
293\r
294 if (crashed_940)\r
295 {\r
296 unsigned char ucData[1024];\r
297 int nRead, i, nLen = 0;\r
298 char binpath[512];\r
299 FILE *fp;\r
300\r
301 emu_make_path(binpath, CODE940_FILE, sizeof(binpath));\r
302 fp = fopen(binpath, "rb");\r
303 if(!fp)\r
304 {\r
305 memset(g_screen_ptr, 0, 320*240*2);\r
306 text_out16(10, 100, "failed to open required file:");\r
307 text_out16(10, 110, CODE940_FILE);\r
308 gp2x_video_flip2();\r
309 printf("failed to open %s\n", binpath);\r
310 exit(1);\r
311 }\r
312\r
313 while(1)\r
314 {\r
315 nRead = fread(ucData, 1, 1024, fp);\r
316 if(nRead <= 0)\r
317 break;\r
318 memcpy(shared_mem + nLen, ucData, nRead);\r
319 nLen += nRead;\r
320 }\r
321 fclose(fp);\r
322 crashed_940 = 0;\r
323 }\r
324\r
325 memset(shared_data, 0, sizeof(*shared_data));\r
326 memset(shared_ctl, 0, sizeof(*shared_ctl));\r
327\r
328 /* cause local ym2612 to init REGS */\r
329 YM2612Init_(baseclock, rate);\r
330\r
331 internal_reset();\r
332\r
333 loaded_mp3 = 0;\r
334\r
335 gp2x_memregs[0x3B46>>1] = 0xffff; // clear pending DUALCPU interrupts for 940\r
336 gp2x_memregl[0x4500>>2] = 0xffffffff; // clear pending IRQs in SRCPND\r
337 gp2x_memregl[0x4510>>2] = 0xffffffff; // clear pending IRQs in INTPND\r
338\r
339 /* start the 940 */\r
340 reset940(0, 2);\r
341 pause940(0);\r
342\r
343 // YM2612ResetChip_940(); // will be done on JOB940_YM2612INIT\r
344\r
345 /* now cause 940 to init it's ym2612 stuff */\r
346 shared_ctl->baseclock = baseclock;\r
347 shared_ctl->rate = rate;\r
348 add_job_940(JOB940_INITALL);\r
349}\r
350\r
351\r
352void YM2612ResetChip_940(void)\r
353{\r
354 //printf("YM2612ResetChip_940()\n");\r
355 if (shared_data == NULL) {\r
356 printf("YM2612ResetChip_940: reset before init?\n");\r
357 return;\r
358 }\r
359\r
360 YM2612ResetChip_();\r
361 internal_reset();\r
362\r
363 add_job_940(JOB940_YM2612RESETCHIP);\r
364}\r
365\r
366\r
367int YM2612UpdateOne_940(int *buffer, int length, int stereo, int is_buf_empty)\r
368{\r
369 int *ym_buf = shared_data->ym_buffer;\r
370 int ym_active_chs;\r
371\r
372 //printf("YM2612UpdateOne_940()\n");\r
373\r
374 if (CHECK_BUSY(JOB940_YM2612UPDATEONE)) wait_busy_940(JOB940_YM2612UPDATEONE);\r
375\r
376 ym_active_chs = shared_ctl->ym_active_chs;\r
377\r
378 // mix in ym buffer. is_buf_empty means nobody mixed there anything yet and it may contain trash\r
379 if (is_buf_empty && ym_active_chs) memcpy32(buffer, ym_buf, length<<stereo);\r
380 else memset32(buffer, 0, length<<stereo);\r
381\r
382 if (shared_ctl->writebuffsel == 1) {\r
383 shared_ctl->writebuff0[writebuff_ptr & 0xffff] = 0xffff;\r
384 } else {\r
385 shared_ctl->writebuff1[writebuff_ptr & 0xffff] = 0xffff;\r
386 }\r
387 writebuff_ptr = 0;\r
388\r
389 /* predict sample counter for next frame */\r
390 if (PsndLen_exc_add) {\r
391 length = PsndLen;\r
392 if (PsndLen_exc_cnt + PsndLen_exc_add >= 0x10000) length++;\r
393 }\r
394\r
395 /* give 940 ym job */\r
396 shared_ctl->writebuffsel ^= 1;\r
397 shared_ctl->length = length;\r
398 shared_ctl->stereo = stereo;\r
399\r
400 add_job_940(JOB940_YM2612UPDATEONE);\r
401\r
402 return ym_active_chs;\r
403}\r
404\r
405\r
406static int mp3_samples_ready = 0, mp3_buffer_offs = 0;\r
407static int mp3_play_bufsel = 0, mp3_job_started = 0;\r
408\r
409void mp3_update(int *buffer, int length, int stereo)\r
410{\r
411 int length_mp3;\r
412 int cdda_on;\r
413\r
414 // playback was started, track not ended\r
415 cdda_on = loaded_mp3 && shared_ctl->mp3_offs < shared_ctl->mp3_len;\r
416\r
417 if (!cdda_on) return;\r
418\r
419 if (!(PicoOpt&0x200)) {\r
420 mp3_update_local(buffer, length, stereo);\r
421 return;\r
422 }\r
423\r
424 length_mp3 = length;\r
425 if (PsndRate == 22050) length_mp3 <<= 1; // mp3s are locked to 44100Hz stereo\r
426 else if (PsndRate == 11025) length_mp3 <<= 2; // so make length 44100ish\r
427\r
428 /* do we have to wait? */\r
429 if (mp3_job_started && mp3_samples_ready < length_mp3) {\r
430 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
431 mp3_job_started = 0;\r
432 mp3_samples_ready += 1152;\r
433 }\r
434\r
435 /* mix mp3 data, only stereo */\r
436 if (mp3_samples_ready >= length_mp3)\r
437 {\r
438 int shr = 0;\r
439 void (*mix_samples)(int *dest_buf, short *mp3_buf, int count) = mix_16h_to_32;\r
440 if (PsndRate == 22050) { mix_samples = mix_16h_to_32_s1; shr = 1; }\r
441 else if (PsndRate == 11025) { mix_samples = mix_16h_to_32_s2; shr = 2; }\r
442\r
443 if (1152 - mp3_buffer_offs >= length_mp3) {\r
444 mix_samples(buffer, shared_data->mp3_buffer[mp3_play_bufsel] + mp3_buffer_offs*2, length<<1);\r
445\r
446 mp3_buffer_offs += length_mp3;\r
447 } else {\r
448 // collect samples from both buffers..\r
449 int left = 1152 - mp3_buffer_offs;\r
450 if (mp3_play_bufsel == 0)\r
451 {\r
452 mix_samples(buffer, shared_data->mp3_buffer[0] + mp3_buffer_offs*2, length<<1);\r
453 mp3_buffer_offs = length_mp3 - left;\r
454 mp3_play_bufsel = 1;\r
455 } else {\r
456 mix_samples(buffer, shared_data->mp3_buffer[1] + mp3_buffer_offs*2, (left>>shr)<<1);\r
457 mp3_buffer_offs = length_mp3 - left;\r
458 mix_samples(buffer + ((left>>shr)<<1),\r
459 shared_data->mp3_buffer[0], (mp3_buffer_offs>>shr)<<1);\r
460 mp3_play_bufsel = 0;\r
461 }\r
462 }\r
463 mp3_samples_ready -= length_mp3;\r
464 }\r
465\r
466 // ask to decode more if we already can\r
467 if (!mp3_job_started)\r
468 {\r
469 mp3_job_started = 1;\r
470 shared_ctl->mp3_buffsel ^= 1;\r
471 add_job_940(JOB940_MP3DECODE);\r
472 }\r
473}\r
474\r
475\r
476/***********************************************************/\r
477\r
478void mp3_start_play(FILE *f, int pos) // pos is 0-1023\r
479{\r
480 int byte_offs = 0;\r
481\r
482 if (!(PicoOpt&0x800)) { // cdda disabled?\r
483 return;\r
484 }\r
485\r
486 if (loaded_mp3 != f)\r
487 {\r
488 if (PicoMessage != NULL)\r
489 {\r
490 fseek(f, 0, SEEK_END);\r
491 if (ftell(f) > 2*1024*1024)\r
492 PicoMessage("Loading MP3...");\r
493 }\r
494 fseek(f, 0, SEEK_SET);\r
495 fread(mp3_mem, 1, MP3_SIZE_MAX, f);\r
496 if (!feof(f)) printf("Warning: mp3 was too large, not all data loaded.\n");\r
497 shared_ctl->mp3_len = ftell(f);\r
498 loaded_mp3 = f;\r
499\r
500 if (PicoOpt & POPT_EXT_FM) {\r
501 // as we are going to change 940's cacheable area, we must invalidate it's cache..\r
502 if (CHECK_BUSY(JOB940_MP3DECODE)) wait_busy_940(JOB940_MP3DECODE);\r
503 add_job_940(JOB940_INVALIDATE_DCACHE);\r
504 }\r
505 reset_timing = 1;\r
506 }\r
507\r
508 // seek..\r
509 if (pos) {\r
510 byte_offs = (shared_ctl->mp3_len << 6) >> 10;\r
511 byte_offs *= pos;\r
512 byte_offs >>= 6;\r
513 }\r
514 printf(" mp3 pos1024: %i, byte_offs %i/%i\n", pos, byte_offs, shared_ctl->mp3_len);\r
515\r
516 shared_ctl->mp3_offs = byte_offs;\r
517\r
518 // reset buffer pointers and stuff..\r
519 mp3_samples_ready = mp3_buffer_offs = mp3_play_bufsel = 0;\r
520 mp3_job_started = 0;\r
521 shared_ctl->mp3_buffsel = 1; // will change to 0 on first decode\r
522\r
523 if (PicoOpt & POPT_EXT_FM)\r
524 {\r
525 add_job_940(JOB940_MP3RESET);\r
526 if (CHECK_BUSY(JOB940_MP3RESET)) wait_busy_940(JOB940_MP3RESET);\r
527 }\r
528 else\r
529 mp3_start_local();\r
530}\r
531\r
532\r
533int mp3_get_offset(void)\r
534{\r
535 unsigned int offs1024 = 0;\r
536 int cdda_on;\r
537\r
538 cdda_on = (PicoAHW & PAHW_MCD) && (PicoOpt&0x800) && !(Pico_mcd->s68k_regs[0x36] & 1) &&\r
539 (Pico_mcd->scd.Status_CDC & 1) && loaded_mp3;\r
540\r
541 if (cdda_on) {\r
542 offs1024 = shared_ctl->mp3_offs << 7;\r
543 offs1024 /= shared_ctl->mp3_len >> 3;\r
544 }\r
545 printf("offs1024=%u (%i/%i)\n", offs1024, shared_ctl->mp3_offs, shared_ctl->mp3_len);\r
546\r
547 return offs1024;\r
548}\r
549\r
550\r
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