2446536b |
1 | /* |
2 | * libretro core glue for PicoDrive |
3 | * (C) notaz, 2013 |
4 | * |
5 | * This work is licensed under the terms of MAME license. |
6 | * See COPYING file in the top-level directory. |
7 | */ |
8 | |
9 | #define _GNU_SOURCE 1 // mremap |
10 | #include <stdio.h> |
11 | #include <stdarg.h> |
12 | #include <string.h> |
13 | #include <sys/mman.h> |
c25d78ee |
14 | #include <errno.h> |
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15 | #ifdef __MACH__ |
16 | #include <libkern/OSCacheControl.h> |
17 | #endif |
18 | |
19 | #include <pico/pico_int.h> |
20 | #include "common/input_pico.h" |
21 | #include "common/version.h" |
22 | #include "libretro.h" |
23 | |
8c8b7284 |
24 | #ifndef MAP_ANONYMOUS |
25 | #define MAP_ANONYMOUS MAP_ANON |
26 | #endif |
27 | |
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28 | static retro_video_refresh_t video_cb; |
29 | static retro_input_poll_t input_poll_cb; |
30 | static retro_input_state_t input_state_cb; |
31 | static retro_environment_t environ_cb; |
32 | static retro_audio_sample_batch_t audio_batch_cb; |
33 | |
34 | static FILE *emu_log; |
35 | |
36 | #define VOUT_MAX_WIDTH 320 |
37 | #define VOUT_MAX_HEIGHT 240 |
38 | static void *vout_buf; |
39 | static int vout_width, vout_height; |
40 | |
41 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; |
42 | |
2446536b |
43 | static void snd_write(int len); |
44 | |
45 | #ifdef _WIN32 |
46 | #define SLASH '\\' |
47 | #else |
48 | #define SLASH '/' |
49 | #endif |
50 | |
51 | /* functions called by the core */ |
52 | |
53 | void cache_flush_d_inval_i(void *start, void *end) |
54 | { |
55 | #ifdef __arm__ |
56 | #if defined(__BLACKBERRY_QNX__) |
57 | msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE); |
58 | #elif defined(__MACH__) |
59 | size_t len = (char *)end - (char *)start; |
60 | sys_dcache_flush(start, len); |
61 | sys_icache_invalidate(start, len); |
62 | #else |
63 | __clear_cache(start, end); |
64 | #endif |
65 | #endif |
66 | } |
67 | |
68 | void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed) |
69 | { |
70 | int flags = MAP_PRIVATE | MAP_ANONYMOUS; |
71 | void *req, *ret; |
72 | |
73 | req = (void *)addr; |
74 | ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0); |
c25d78ee |
75 | if (ret == MAP_FAILED) { |
76 | lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno); |
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77 | return NULL; |
c25d78ee |
78 | } |
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79 | |
80 | if (addr != 0 && ret != (void *)addr) { |
81 | lprintf("warning: wanted to map @%08lx, got %p\n", |
82 | addr, ret); |
83 | |
84 | if (is_fixed) { |
85 | munmap(ret, size); |
86 | return NULL; |
87 | } |
88 | } |
89 | |
90 | return ret; |
91 | } |
92 | |
93 | void *plat_mremap(void *ptr, size_t oldsize, size_t newsize) |
94 | { |
8c8b7284 |
95 | #ifdef __linux__ |
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96 | void *ret = mremap(ptr, oldsize, newsize, 0); |
97 | if (ret == MAP_FAILED) |
98 | return NULL; |
99 | |
100 | return ret; |
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101 | #else |
102 | void *tmp, *ret; |
103 | size_t preserve_size; |
104 | |
105 | preserve_size = oldsize; |
106 | if (preserve_size > newsize) |
107 | preserve_size = newsize; |
108 | tmp = malloc(preserve_size); |
109 | if (tmp == NULL) |
110 | return NULL; |
111 | memcpy(tmp, ptr, preserve_size); |
112 | |
113 | munmap(ptr, oldsize); |
114 | ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE, |
115 | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); |
116 | if (ret == MAP_FAILED) { |
117 | free(tmp); |
118 | return NULL; |
119 | } |
120 | memcpy(ret, tmp, preserve_size); |
121 | free(tmp); |
122 | return ret; |
123 | #endif |
2446536b |
124 | } |
125 | |
126 | void plat_munmap(void *ptr, size_t size) |
127 | { |
128 | if (ptr != NULL) |
129 | munmap(ptr, size); |
130 | } |
131 | |
c25d78ee |
132 | int plat_mem_set_exec(void *ptr, size_t size) |
133 | { |
134 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); |
135 | if (ret != 0) |
136 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno); |
137 | |
138 | return ret; |
139 | } |
140 | |
2446536b |
141 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
142 | { |
143 | memset(vout_buf, 0, 320 * 240 * 2); |
144 | vout_width = is_32cols ? 256 : 320; |
145 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
146 | } |
147 | |
148 | void emu_32x_startup(void) |
149 | { |
2446536b |
150 | } |
151 | |
152 | #ifndef ANDROID |
153 | |
154 | void lprintf(const char *fmt, ...) |
155 | { |
156 | va_list list; |
157 | |
158 | va_start(list, fmt); |
159 | fprintf(emu_log, "PicoDrive: "); |
160 | vfprintf(emu_log, fmt, list); |
161 | va_end(list); |
162 | fflush(emu_log); |
163 | } |
164 | |
165 | #else |
166 | |
167 | #include <android/log.h> |
168 | |
169 | void lprintf(const char *fmt, ...) |
170 | { |
171 | va_list list; |
172 | |
173 | va_start(list, fmt); |
174 | __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); |
175 | va_end(list); |
176 | } |
177 | |
178 | #endif |
179 | |
180 | /* libretro */ |
181 | void retro_set_environment(retro_environment_t cb) |
182 | { |
183 | static const struct retro_variable vars[] = { |
184 | //{ "region", "Region; Auto|NTSC|PAL" }, |
185 | { NULL, NULL }, |
186 | }; |
187 | |
188 | environ_cb = cb; |
189 | |
190 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); |
191 | } |
192 | |
193 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } |
194 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } |
195 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } |
196 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } |
197 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } |
198 | |
199 | unsigned retro_api_version(void) |
200 | { |
201 | return RETRO_API_VERSION; |
202 | } |
203 | |
204 | void retro_set_controller_port_device(unsigned port, unsigned device) |
205 | { |
206 | } |
207 | |
208 | void retro_get_system_info(struct retro_system_info *info) |
209 | { |
210 | memset(info, 0, sizeof(*info)); |
211 | info->library_name = "PicoDrive"; |
212 | info->library_version = VERSION; |
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213 | info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms"; |
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214 | info->need_fullpath = true; |
215 | } |
216 | |
217 | void retro_get_system_av_info(struct retro_system_av_info *info) |
218 | { |
219 | memset(info, 0, sizeof(*info)); |
220 | info->timing.fps = Pico.m.pal ? 50 : 60; |
221 | info->timing.sample_rate = 44100; |
222 | info->geometry.base_width = 320; |
223 | info->geometry.base_height = 240; |
224 | info->geometry.max_width = VOUT_MAX_WIDTH; |
225 | info->geometry.max_height = VOUT_MAX_HEIGHT; |
226 | info->geometry.aspect_ratio = 4.0 / 3.0; |
227 | } |
228 | |
229 | /* savestates - TODO */ |
230 | size_t retro_serialize_size(void) |
231 | { |
232 | return 0; |
233 | } |
234 | |
235 | bool retro_serialize(void *data, size_t size) |
236 | { |
237 | return false; |
238 | } |
239 | |
240 | bool retro_unserialize(const void *data, size_t size) |
241 | { |
242 | return false; |
243 | } |
244 | |
245 | /* cheats - TODO */ |
246 | void retro_cheat_reset(void) |
247 | { |
248 | } |
249 | |
250 | void retro_cheat_set(unsigned index, bool enabled, const char *code) |
251 | { |
252 | } |
253 | |
254 | /* multidisk support */ |
255 | static bool disk_ejected; |
256 | static unsigned int disk_current_index; |
257 | static unsigned int disk_count; |
258 | static struct disks_state { |
259 | char *fname; |
260 | } disks[8]; |
261 | |
262 | static bool disk_set_eject_state(bool ejected) |
263 | { |
264 | // TODO? |
265 | disk_ejected = ejected; |
266 | return true; |
267 | } |
268 | |
269 | static bool disk_get_eject_state(void) |
270 | { |
271 | return disk_ejected; |
272 | } |
273 | |
274 | static unsigned int disk_get_image_index(void) |
275 | { |
276 | return disk_current_index; |
277 | } |
278 | |
279 | static bool disk_set_image_index(unsigned int index) |
280 | { |
281 | cd_img_type cd_type; |
282 | int ret; |
283 | |
284 | if (index >= sizeof(disks) / sizeof(disks[0])) |
285 | return false; |
286 | |
287 | if (disks[index].fname == NULL) { |
288 | lprintf("missing disk #%u\n", index); |
289 | |
290 | // RetroArch specifies "no disk" with index == count, |
291 | // so don't fail here.. |
292 | disk_current_index = index; |
293 | return true; |
294 | } |
295 | |
296 | lprintf("switching to disk %u: \"%s\"\n", index, |
297 | disks[index].fname); |
298 | |
299 | ret = -1; |
300 | cd_type = PicoCdCheck(disks[index].fname, NULL); |
301 | if (cd_type != CIT_NOT_CD) |
302 | ret = Insert_CD(disks[index].fname, cd_type); |
303 | if (ret != 0) { |
304 | lprintf("Load failed, invalid CD image?\n"); |
305 | return 0; |
306 | } |
307 | |
308 | disk_current_index = index; |
309 | return true; |
310 | } |
311 | |
312 | static unsigned int disk_get_num_images(void) |
313 | { |
314 | return disk_count; |
315 | } |
316 | |
317 | static bool disk_replace_image_index(unsigned index, |
318 | const struct retro_game_info *info) |
319 | { |
320 | bool ret = true; |
321 | |
322 | if (index >= sizeof(disks) / sizeof(disks[0])) |
323 | return false; |
324 | |
325 | if (disks[index].fname != NULL) |
326 | free(disks[index].fname); |
327 | disks[index].fname = NULL; |
328 | |
329 | if (info != NULL) { |
330 | disks[index].fname = strdup(info->path); |
331 | if (index == disk_current_index) |
332 | ret = disk_set_image_index(index); |
333 | } |
334 | |
335 | return ret; |
336 | } |
337 | |
338 | static bool disk_add_image_index(void) |
339 | { |
340 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) |
341 | return false; |
342 | |
343 | disk_count++; |
344 | return true; |
345 | } |
346 | |
347 | static struct retro_disk_control_callback disk_control = { |
348 | .set_eject_state = disk_set_eject_state, |
349 | .get_eject_state = disk_get_eject_state, |
350 | .get_image_index = disk_get_image_index, |
351 | .set_image_index = disk_set_image_index, |
352 | .get_num_images = disk_get_num_images, |
353 | .replace_image_index = disk_replace_image_index, |
354 | .add_image_index = disk_add_image_index, |
355 | }; |
356 | |
357 | static void disk_tray_open(void) |
358 | { |
359 | lprintf("cd tray open\n"); |
360 | disk_ejected = 1; |
361 | } |
362 | |
363 | static void disk_tray_close(void) |
364 | { |
365 | lprintf("cd tray close\n"); |
366 | disk_ejected = 0; |
367 | } |
368 | |
369 | |
370 | static const char * const biosfiles_us[] = { |
371 | "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" |
372 | }; |
373 | static const char * const biosfiles_eu[] = { |
374 | "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" |
375 | }; |
376 | static const char * const biosfiles_jp[] = { |
377 | "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
378 | }; |
379 | |
380 | static void make_system_path(char *buf, size_t buf_size, |
381 | const char *name, const char *ext) |
382 | { |
383 | const char *dir = NULL; |
384 | |
385 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { |
386 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); |
387 | } |
388 | else { |
389 | snprintf(buf, buf_size, "%s%s", name, ext); |
390 | } |
391 | } |
392 | |
393 | static const char *find_bios(int *region, const char *cd_fname) |
394 | { |
395 | const char * const *files; |
396 | static char path[256]; |
397 | int i, count; |
398 | FILE *f = NULL; |
399 | |
400 | if (*region == 4) { // US |
401 | files = biosfiles_us; |
402 | count = sizeof(biosfiles_us) / sizeof(char *); |
403 | } else if (*region == 8) { // EU |
404 | files = biosfiles_eu; |
405 | count = sizeof(biosfiles_eu) / sizeof(char *); |
406 | } else if (*region == 1 || *region == 2) { |
407 | files = biosfiles_jp; |
408 | count = sizeof(biosfiles_jp) / sizeof(char *); |
409 | } else { |
410 | return NULL; |
411 | } |
412 | |
413 | for (i = 0; i < count; i++) |
414 | { |
415 | make_system_path(path, sizeof(path), files[i], ".bin"); |
416 | f = fopen(path, "rb"); |
417 | if (f != NULL) |
418 | break; |
419 | |
420 | make_system_path(path, sizeof(path), files[i], ".zip"); |
421 | f = fopen(path, "rb"); |
422 | if (f != NULL) |
423 | break; |
424 | } |
425 | |
426 | if (f != NULL) { |
427 | lprintf("using bios: %s\n", path); |
428 | fclose(f); |
429 | return path; |
430 | } |
431 | |
432 | return NULL; |
433 | } |
434 | |
435 | bool retro_load_game(const struct retro_game_info *info) |
436 | { |
437 | enum media_type_e media_type; |
438 | static char carthw_path[256]; |
439 | size_t i; |
440 | |
441 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; |
442 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { |
443 | lprintf("RGB565 suppot required, sorry\n"); |
444 | return false; |
445 | } |
446 | |
447 | if (info == NULL || info->path == NULL) { |
448 | lprintf("info->path required\n"); |
449 | return false; |
450 | } |
451 | |
452 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { |
453 | if (disks[i].fname != NULL) { |
454 | free(disks[i].fname); |
455 | disks[i].fname = NULL; |
456 | } |
457 | } |
458 | |
459 | disk_current_index = 0; |
460 | disk_count = 1; |
461 | disks[0].fname = strdup(info->path); |
462 | |
463 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); |
464 | |
465 | media_type = PicoLoadMedia(info->path, carthw_path, |
466 | find_bios, NULL); |
467 | |
468 | switch (media_type) { |
469 | case PM_BAD_DETECT: |
470 | lprintf("Failed to detect ROM/CD image type.\n"); |
471 | return false; |
472 | case PM_BAD_CD: |
473 | lprintf("Invalid CD image\n"); |
474 | return false; |
475 | case PM_BAD_CD_NO_BIOS: |
476 | lprintf("Missing BIOS\n"); |
477 | return false; |
478 | case PM_ERROR: |
479 | lprintf("Load error\n"); |
480 | return false; |
481 | default: |
482 | break; |
483 | } |
484 | |
485 | PicoLoopPrepare(); |
486 | |
487 | PicoWriteSound = snd_write; |
488 | memset(sndBuffer, 0, sizeof(sndBuffer)); |
489 | PsndOut = sndBuffer; |
490 | PsndRerate(1); |
491 | |
492 | return true; |
493 | } |
494 | |
495 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) |
496 | { |
497 | return false; |
498 | } |
499 | |
500 | void retro_unload_game(void) |
501 | { |
502 | } |
503 | |
504 | unsigned retro_get_region(void) |
505 | { |
506 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; |
507 | } |
508 | |
509 | void *retro_get_memory_data(unsigned id) |
510 | { |
511 | if (id != RETRO_MEMORY_SAVE_RAM) |
512 | return NULL; |
513 | |
514 | if (PicoAHW & PAHW_MCD) |
515 | return Pico_mcd->bram; |
516 | else |
517 | return SRam.data; |
518 | } |
519 | |
520 | size_t retro_get_memory_size(unsigned id) |
521 | { |
522 | if (id != RETRO_MEMORY_SAVE_RAM) |
523 | return 0; |
524 | |
525 | if (PicoAHW & PAHW_MCD) |
526 | // bram |
527 | return 0x2000; |
528 | else |
529 | return SRam.size; |
530 | } |
531 | |
532 | void retro_reset(void) |
533 | { |
534 | PicoReset(); |
535 | } |
536 | |
537 | static const unsigned short retro_pico_map[] = { |
538 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, |
539 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, |
540 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, |
541 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, |
542 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, |
543 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, |
544 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, |
545 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, |
546 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, |
547 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, |
548 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, |
549 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, |
550 | }; |
551 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) |
552 | |
553 | static void snd_write(int len) |
554 | { |
555 | audio_batch_cb(PsndOut, len / 4); |
556 | } |
557 | |
558 | void retro_run(void) |
559 | { |
560 | bool updated = false; |
561 | int pad, i; |
562 | |
563 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) |
564 | ; //update_variables(true); |
565 | |
566 | input_poll_cb(); |
567 | |
568 | PicoPad[0] = PicoPad[1] = 0; |
569 | for (pad = 0; pad < 2; pad++) |
570 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) |
571 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) |
572 | PicoPad[pad] |= retro_pico_map[i]; |
573 | |
574 | PicoFrame(); |
575 | |
576 | video_cb(vout_buf, vout_width, vout_height, vout_width * 2); |
577 | } |
578 | |
579 | void retro_init(void) |
580 | { |
581 | int level; |
582 | |
583 | #ifdef IOS |
584 | emu_log = fopen("/User/Documents/PicoDrive.log", "w"); |
585 | if (emu_log == NULL) |
586 | emu_log = fopen("PicoDrive.log", "w"); |
587 | if (emu_log == NULL) |
588 | #endif |
589 | emu_log = stdout; |
590 | |
591 | level = 0; |
592 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); |
593 | |
594 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
595 | |
596 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
720bfc5d |
597 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX |
598 | | POPT_EN_32X|POPT_EN_PWM |
599 | | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER; |
600 | #ifdef __arm__ |
601 | PicoOpt |= POPT_EN_SVP_DRC; |
602 | #endif |
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603 | PsndRate = 44100; |
604 | PicoAutoRgnOrder = 0x184; // US, EU, JP |
605 | PicoCDBuffers = 0; |
606 | |
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607 | vout_width = 320; |
608 | vout_height = 240; |
609 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); |
610 | |
611 | PicoInit(); |
41946d70 |
612 | PicoDrawSetOutFormat(PDF_RGB555, 0); |
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613 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
614 | |
615 | //PicoMessage = plat_status_msg_busy_next; |
616 | PicoMCDopenTray = disk_tray_open; |
617 | PicoMCDcloseTray = disk_tray_close; |
618 | } |
619 | |
620 | void retro_deinit(void) |
621 | { |
622 | PicoExit(); |
623 | } |