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> |
2446536b |
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 | |
24 | static retro_video_refresh_t video_cb; |
25 | static retro_input_poll_t input_poll_cb; |
26 | static retro_input_state_t input_state_cb; |
27 | static retro_environment_t environ_cb; |
28 | static retro_audio_sample_batch_t audio_batch_cb; |
29 | |
30 | static FILE *emu_log; |
31 | |
32 | #define VOUT_MAX_WIDTH 320 |
33 | #define VOUT_MAX_HEIGHT 240 |
34 | static void *vout_buf; |
35 | static int vout_width, vout_height; |
36 | |
37 | static short __attribute__((aligned(4))) sndBuffer[2*44100/50]; |
38 | |
39 | // FIXME: these 2 shouldn't be here |
40 | static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)]; |
41 | unsigned char *PicoDraw2FB = PicoDraw2FB_; |
42 | |
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); |
2446536b |
77 | return NULL; |
c25d78ee |
78 | } |
2446536b |
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 | { |
95 | void *ret = mremap(ptr, oldsize, newsize, 0); |
96 | if (ret == MAP_FAILED) |
97 | return NULL; |
98 | |
99 | return ret; |
100 | } |
101 | |
102 | void plat_munmap(void *ptr, size_t size) |
103 | { |
104 | if (ptr != NULL) |
105 | munmap(ptr, size); |
106 | } |
107 | |
c25d78ee |
108 | int plat_mem_set_exec(void *ptr, size_t size) |
109 | { |
110 | int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC); |
111 | if (ret != 0) |
112 | lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno); |
113 | |
114 | return ret; |
115 | } |
116 | |
2446536b |
117 | void emu_video_mode_change(int start_line, int line_count, int is_32cols) |
118 | { |
119 | memset(vout_buf, 0, 320 * 240 * 2); |
120 | vout_width = is_32cols ? 256 : 320; |
121 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
122 | } |
123 | |
124 | void emu_32x_startup(void) |
125 | { |
126 | PicoDrawSetOutFormat(PDF_RGB555, 1); |
127 | } |
128 | |
129 | #ifndef ANDROID |
130 | |
131 | void lprintf(const char *fmt, ...) |
132 | { |
133 | va_list list; |
134 | |
135 | va_start(list, fmt); |
136 | fprintf(emu_log, "PicoDrive: "); |
137 | vfprintf(emu_log, fmt, list); |
138 | va_end(list); |
139 | fflush(emu_log); |
140 | } |
141 | |
142 | #else |
143 | |
144 | #include <android/log.h> |
145 | |
146 | void lprintf(const char *fmt, ...) |
147 | { |
148 | va_list list; |
149 | |
150 | va_start(list, fmt); |
151 | __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list); |
152 | va_end(list); |
153 | } |
154 | |
155 | #endif |
156 | |
157 | /* libretro */ |
158 | void retro_set_environment(retro_environment_t cb) |
159 | { |
160 | static const struct retro_variable vars[] = { |
161 | //{ "region", "Region; Auto|NTSC|PAL" }, |
162 | { NULL, NULL }, |
163 | }; |
164 | |
165 | environ_cb = cb; |
166 | |
167 | cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars); |
168 | } |
169 | |
170 | void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } |
171 | void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; } |
172 | void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; } |
173 | void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } |
174 | void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } |
175 | |
176 | unsigned retro_api_version(void) |
177 | { |
178 | return RETRO_API_VERSION; |
179 | } |
180 | |
181 | void retro_set_controller_port_device(unsigned port, unsigned device) |
182 | { |
183 | } |
184 | |
185 | void retro_get_system_info(struct retro_system_info *info) |
186 | { |
187 | memset(info, 0, sizeof(*info)); |
188 | info->library_name = "PicoDrive"; |
189 | info->library_version = VERSION; |
190 | info->valid_extensions = "bin|gen|smd|32x|cue|iso|sms"; |
191 | info->need_fullpath = true; |
192 | } |
193 | |
194 | void retro_get_system_av_info(struct retro_system_av_info *info) |
195 | { |
196 | memset(info, 0, sizeof(*info)); |
197 | info->timing.fps = Pico.m.pal ? 50 : 60; |
198 | info->timing.sample_rate = 44100; |
199 | info->geometry.base_width = 320; |
200 | info->geometry.base_height = 240; |
201 | info->geometry.max_width = VOUT_MAX_WIDTH; |
202 | info->geometry.max_height = VOUT_MAX_HEIGHT; |
203 | info->geometry.aspect_ratio = 4.0 / 3.0; |
204 | } |
205 | |
206 | /* savestates - TODO */ |
207 | size_t retro_serialize_size(void) |
208 | { |
209 | return 0; |
210 | } |
211 | |
212 | bool retro_serialize(void *data, size_t size) |
213 | { |
214 | return false; |
215 | } |
216 | |
217 | bool retro_unserialize(const void *data, size_t size) |
218 | { |
219 | return false; |
220 | } |
221 | |
222 | /* cheats - TODO */ |
223 | void retro_cheat_reset(void) |
224 | { |
225 | } |
226 | |
227 | void retro_cheat_set(unsigned index, bool enabled, const char *code) |
228 | { |
229 | } |
230 | |
231 | /* multidisk support */ |
232 | static bool disk_ejected; |
233 | static unsigned int disk_current_index; |
234 | static unsigned int disk_count; |
235 | static struct disks_state { |
236 | char *fname; |
237 | } disks[8]; |
238 | |
239 | static bool disk_set_eject_state(bool ejected) |
240 | { |
241 | // TODO? |
242 | disk_ejected = ejected; |
243 | return true; |
244 | } |
245 | |
246 | static bool disk_get_eject_state(void) |
247 | { |
248 | return disk_ejected; |
249 | } |
250 | |
251 | static unsigned int disk_get_image_index(void) |
252 | { |
253 | return disk_current_index; |
254 | } |
255 | |
256 | static bool disk_set_image_index(unsigned int index) |
257 | { |
258 | cd_img_type cd_type; |
259 | int ret; |
260 | |
261 | if (index >= sizeof(disks) / sizeof(disks[0])) |
262 | return false; |
263 | |
264 | if (disks[index].fname == NULL) { |
265 | lprintf("missing disk #%u\n", index); |
266 | |
267 | // RetroArch specifies "no disk" with index == count, |
268 | // so don't fail here.. |
269 | disk_current_index = index; |
270 | return true; |
271 | } |
272 | |
273 | lprintf("switching to disk %u: \"%s\"\n", index, |
274 | disks[index].fname); |
275 | |
276 | ret = -1; |
277 | cd_type = PicoCdCheck(disks[index].fname, NULL); |
278 | if (cd_type != CIT_NOT_CD) |
279 | ret = Insert_CD(disks[index].fname, cd_type); |
280 | if (ret != 0) { |
281 | lprintf("Load failed, invalid CD image?\n"); |
282 | return 0; |
283 | } |
284 | |
285 | disk_current_index = index; |
286 | return true; |
287 | } |
288 | |
289 | static unsigned int disk_get_num_images(void) |
290 | { |
291 | return disk_count; |
292 | } |
293 | |
294 | static bool disk_replace_image_index(unsigned index, |
295 | const struct retro_game_info *info) |
296 | { |
297 | bool ret = true; |
298 | |
299 | if (index >= sizeof(disks) / sizeof(disks[0])) |
300 | return false; |
301 | |
302 | if (disks[index].fname != NULL) |
303 | free(disks[index].fname); |
304 | disks[index].fname = NULL; |
305 | |
306 | if (info != NULL) { |
307 | disks[index].fname = strdup(info->path); |
308 | if (index == disk_current_index) |
309 | ret = disk_set_image_index(index); |
310 | } |
311 | |
312 | return ret; |
313 | } |
314 | |
315 | static bool disk_add_image_index(void) |
316 | { |
317 | if (disk_count >= sizeof(disks) / sizeof(disks[0])) |
318 | return false; |
319 | |
320 | disk_count++; |
321 | return true; |
322 | } |
323 | |
324 | static struct retro_disk_control_callback disk_control = { |
325 | .set_eject_state = disk_set_eject_state, |
326 | .get_eject_state = disk_get_eject_state, |
327 | .get_image_index = disk_get_image_index, |
328 | .set_image_index = disk_set_image_index, |
329 | .get_num_images = disk_get_num_images, |
330 | .replace_image_index = disk_replace_image_index, |
331 | .add_image_index = disk_add_image_index, |
332 | }; |
333 | |
334 | static void disk_tray_open(void) |
335 | { |
336 | lprintf("cd tray open\n"); |
337 | disk_ejected = 1; |
338 | } |
339 | |
340 | static void disk_tray_close(void) |
341 | { |
342 | lprintf("cd tray close\n"); |
343 | disk_ejected = 0; |
344 | } |
345 | |
346 | |
347 | static const char * const biosfiles_us[] = { |
348 | "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U" |
349 | }; |
350 | static const char * const biosfiles_eu[] = { |
351 | "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E" |
352 | }; |
353 | static const char * const biosfiles_jp[] = { |
354 | "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J" |
355 | }; |
356 | |
357 | static void make_system_path(char *buf, size_t buf_size, |
358 | const char *name, const char *ext) |
359 | { |
360 | const char *dir = NULL; |
361 | |
362 | if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) { |
363 | snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext); |
364 | } |
365 | else { |
366 | snprintf(buf, buf_size, "%s%s", name, ext); |
367 | } |
368 | } |
369 | |
370 | static const char *find_bios(int *region, const char *cd_fname) |
371 | { |
372 | const char * const *files; |
373 | static char path[256]; |
374 | int i, count; |
375 | FILE *f = NULL; |
376 | |
377 | if (*region == 4) { // US |
378 | files = biosfiles_us; |
379 | count = sizeof(biosfiles_us) / sizeof(char *); |
380 | } else if (*region == 8) { // EU |
381 | files = biosfiles_eu; |
382 | count = sizeof(biosfiles_eu) / sizeof(char *); |
383 | } else if (*region == 1 || *region == 2) { |
384 | files = biosfiles_jp; |
385 | count = sizeof(biosfiles_jp) / sizeof(char *); |
386 | } else { |
387 | return NULL; |
388 | } |
389 | |
390 | for (i = 0; i < count; i++) |
391 | { |
392 | make_system_path(path, sizeof(path), files[i], ".bin"); |
393 | f = fopen(path, "rb"); |
394 | if (f != NULL) |
395 | break; |
396 | |
397 | make_system_path(path, sizeof(path), files[i], ".zip"); |
398 | f = fopen(path, "rb"); |
399 | if (f != NULL) |
400 | break; |
401 | } |
402 | |
403 | if (f != NULL) { |
404 | lprintf("using bios: %s\n", path); |
405 | fclose(f); |
406 | return path; |
407 | } |
408 | |
409 | return NULL; |
410 | } |
411 | |
412 | bool retro_load_game(const struct retro_game_info *info) |
413 | { |
414 | enum media_type_e media_type; |
415 | static char carthw_path[256]; |
416 | size_t i; |
417 | |
418 | enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565; |
419 | if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { |
420 | lprintf("RGB565 suppot required, sorry\n"); |
421 | return false; |
422 | } |
423 | |
424 | if (info == NULL || info->path == NULL) { |
425 | lprintf("info->path required\n"); |
426 | return false; |
427 | } |
428 | |
429 | for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) { |
430 | if (disks[i].fname != NULL) { |
431 | free(disks[i].fname); |
432 | disks[i].fname = NULL; |
433 | } |
434 | } |
435 | |
436 | disk_current_index = 0; |
437 | disk_count = 1; |
438 | disks[0].fname = strdup(info->path); |
439 | |
440 | make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg"); |
441 | |
442 | media_type = PicoLoadMedia(info->path, carthw_path, |
443 | find_bios, NULL); |
444 | |
445 | switch (media_type) { |
446 | case PM_BAD_DETECT: |
447 | lprintf("Failed to detect ROM/CD image type.\n"); |
448 | return false; |
449 | case PM_BAD_CD: |
450 | lprintf("Invalid CD image\n"); |
451 | return false; |
452 | case PM_BAD_CD_NO_BIOS: |
453 | lprintf("Missing BIOS\n"); |
454 | return false; |
455 | case PM_ERROR: |
456 | lprintf("Load error\n"); |
457 | return false; |
458 | default: |
459 | break; |
460 | } |
461 | |
462 | PicoLoopPrepare(); |
463 | |
464 | PicoWriteSound = snd_write; |
465 | memset(sndBuffer, 0, sizeof(sndBuffer)); |
466 | PsndOut = sndBuffer; |
467 | PsndRerate(1); |
468 | |
469 | return true; |
470 | } |
471 | |
472 | bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info) |
473 | { |
474 | return false; |
475 | } |
476 | |
477 | void retro_unload_game(void) |
478 | { |
479 | } |
480 | |
481 | unsigned retro_get_region(void) |
482 | { |
483 | return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; |
484 | } |
485 | |
486 | void *retro_get_memory_data(unsigned id) |
487 | { |
488 | if (id != RETRO_MEMORY_SAVE_RAM) |
489 | return NULL; |
490 | |
491 | if (PicoAHW & PAHW_MCD) |
492 | return Pico_mcd->bram; |
493 | else |
494 | return SRam.data; |
495 | } |
496 | |
497 | size_t retro_get_memory_size(unsigned id) |
498 | { |
499 | if (id != RETRO_MEMORY_SAVE_RAM) |
500 | return 0; |
501 | |
502 | if (PicoAHW & PAHW_MCD) |
503 | // bram |
504 | return 0x2000; |
505 | else |
506 | return SRam.size; |
507 | } |
508 | |
509 | void retro_reset(void) |
510 | { |
511 | PicoReset(); |
512 | } |
513 | |
514 | static const unsigned short retro_pico_map[] = { |
515 | [RETRO_DEVICE_ID_JOYPAD_B] = 1 << GBTN_B, |
516 | [RETRO_DEVICE_ID_JOYPAD_Y] = 1 << GBTN_A, |
517 | [RETRO_DEVICE_ID_JOYPAD_SELECT] = 1 << GBTN_MODE, |
518 | [RETRO_DEVICE_ID_JOYPAD_START] = 1 << GBTN_START, |
519 | [RETRO_DEVICE_ID_JOYPAD_UP] = 1 << GBTN_UP, |
520 | [RETRO_DEVICE_ID_JOYPAD_DOWN] = 1 << GBTN_DOWN, |
521 | [RETRO_DEVICE_ID_JOYPAD_LEFT] = 1 << GBTN_LEFT, |
522 | [RETRO_DEVICE_ID_JOYPAD_RIGHT] = 1 << GBTN_RIGHT, |
523 | [RETRO_DEVICE_ID_JOYPAD_A] = 1 << GBTN_C, |
524 | [RETRO_DEVICE_ID_JOYPAD_X] = 1 << GBTN_Y, |
525 | [RETRO_DEVICE_ID_JOYPAD_L] = 1 << GBTN_X, |
526 | [RETRO_DEVICE_ID_JOYPAD_R] = 1 << GBTN_Z, |
527 | }; |
528 | #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0])) |
529 | |
530 | static void snd_write(int len) |
531 | { |
532 | audio_batch_cb(PsndOut, len / 4); |
533 | } |
534 | |
535 | void retro_run(void) |
536 | { |
537 | bool updated = false; |
538 | int pad, i; |
539 | |
540 | if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) |
541 | ; //update_variables(true); |
542 | |
543 | input_poll_cb(); |
544 | |
545 | PicoPad[0] = PicoPad[1] = 0; |
546 | for (pad = 0; pad < 2; pad++) |
547 | for (i = 0; i < RETRO_PICO_MAP_LEN; i++) |
548 | if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i)) |
549 | PicoPad[pad] |= retro_pico_map[i]; |
550 | |
551 | PicoFrame(); |
552 | |
553 | video_cb(vout_buf, vout_width, vout_height, vout_width * 2); |
554 | } |
555 | |
556 | void retro_init(void) |
557 | { |
558 | int level; |
559 | |
560 | #ifdef IOS |
561 | emu_log = fopen("/User/Documents/PicoDrive.log", "w"); |
562 | if (emu_log == NULL) |
563 | emu_log = fopen("PicoDrive.log", "w"); |
564 | if (emu_log == NULL) |
565 | #endif |
566 | emu_log = stdout; |
567 | |
568 | level = 0; |
569 | environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level); |
570 | |
571 | environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control); |
572 | |
573 | PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
574 | | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC |
575 | | POPT_ACC_SPRITES|POPT_EN_32X|POPT_EN_PWM |
576 | | POPT_DIS_32C_BORDER; |
577 | PsndRate = 44100; |
578 | PicoAutoRgnOrder = 0x184; // US, EU, JP |
579 | PicoCDBuffers = 0; |
580 | |
581 | p32x_msh2_multiplier = MSH2_MULTI_DEFAULT; |
582 | p32x_ssh2_multiplier = SSH2_MULTI_DEFAULT; |
583 | |
584 | vout_width = 320; |
585 | vout_height = 240; |
586 | vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2); |
587 | |
588 | PicoInit(); |
589 | PicoDrawSetOutFormat(PDF_RGB555, 1); |
590 | PicoDrawSetOutBuf(vout_buf, vout_width * 2); |
591 | |
592 | //PicoMessage = plat_status_msg_busy_next; |
593 | PicoMCDopenTray = disk_tray_open; |
594 | PicoMCDcloseTray = disk_tray_close; |
595 | } |
596 | |
597 | void retro_deinit(void) |
598 | { |
599 | PicoExit(); |
600 | } |