2 * libretro core glue for PicoDrive
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
9 #define _GNU_SOURCE 1 // mremap
16 #include <libkern/OSCacheControl.h>
19 #include <pico/pico_int.h>
20 #include "common/input_pico.h"
21 #include "common/version.h"
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;
32 #define VOUT_MAX_WIDTH 320
33 #define VOUT_MAX_HEIGHT 240
34 static void *vout_buf;
35 static int vout_width, vout_height;
37 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
39 // FIXME: these 2 shouldn't be here
40 static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];
41 unsigned char *PicoDraw2FB = PicoDraw2FB_;
43 static void snd_write(int len);
51 /* functions called by the core */
53 void cache_flush_d_inval_i(void *start, void *end)
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);
63 __clear_cache(start, end);
68 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
70 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
74 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
75 if (ret == MAP_FAILED) {
76 lprintf("mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
80 if (addr != 0 && ret != (void *)addr) {
81 lprintf("warning: wanted to map @%08lx, got %p\n",
93 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
95 void *ret = mremap(ptr, oldsize, newsize, 0);
96 if (ret == MAP_FAILED)
102 void plat_munmap(void *ptr, size_t size)
108 int plat_mem_set_exec(void *ptr, size_t size)
110 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
112 lprintf("mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
117 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
119 memset(vout_buf, 0, 320 * 240 * 2);
120 vout_width = is_32cols ? 256 : 320;
121 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
124 void emu_32x_startup(void)
126 PicoDrawSetOutFormat(PDF_RGB555, 1);
131 void lprintf(const char *fmt, ...)
136 fprintf(emu_log, "PicoDrive: ");
137 vfprintf(emu_log, fmt, list);
144 #include <android/log.h>
146 void lprintf(const char *fmt, ...)
151 __android_log_vprint(ANDROID_LOG_INFO, "PicoDrive", fmt, list);
158 void retro_set_environment(retro_environment_t cb)
160 static const struct retro_variable vars[] = {
161 //{ "region", "Region; Auto|NTSC|PAL" },
167 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
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; }
176 unsigned retro_api_version(void)
178 return RETRO_API_VERSION;
181 void retro_set_controller_port_device(unsigned port, unsigned device)
185 void retro_get_system_info(struct retro_system_info *info)
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;
194 void retro_get_system_av_info(struct retro_system_av_info *info)
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;
206 /* savestates - TODO */
207 size_t retro_serialize_size(void)
212 bool retro_serialize(void *data, size_t size)
217 bool retro_unserialize(const void *data, size_t size)
223 void retro_cheat_reset(void)
227 void retro_cheat_set(unsigned index, bool enabled, const char *code)
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 {
239 static bool disk_set_eject_state(bool ejected)
242 disk_ejected = ejected;
246 static bool disk_get_eject_state(void)
251 static unsigned int disk_get_image_index(void)
253 return disk_current_index;
256 static bool disk_set_image_index(unsigned int index)
261 if (index >= sizeof(disks) / sizeof(disks[0]))
264 if (disks[index].fname == NULL) {
265 lprintf("missing disk #%u\n", index);
267 // RetroArch specifies "no disk" with index == count,
268 // so don't fail here..
269 disk_current_index = index;
273 lprintf("switching to disk %u: \"%s\"\n", index,
277 cd_type = PicoCdCheck(disks[index].fname, NULL);
278 if (cd_type != CIT_NOT_CD)
279 ret = Insert_CD(disks[index].fname, cd_type);
281 lprintf("Load failed, invalid CD image?\n");
285 disk_current_index = index;
289 static unsigned int disk_get_num_images(void)
294 static bool disk_replace_image_index(unsigned index,
295 const struct retro_game_info *info)
299 if (index >= sizeof(disks) / sizeof(disks[0]))
302 if (disks[index].fname != NULL)
303 free(disks[index].fname);
304 disks[index].fname = NULL;
307 disks[index].fname = strdup(info->path);
308 if (index == disk_current_index)
309 ret = disk_set_image_index(index);
315 static bool disk_add_image_index(void)
317 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
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,
334 static void disk_tray_open(void)
336 lprintf("cd tray open\n");
340 static void disk_tray_close(void)
342 lprintf("cd tray close\n");
347 static const char * const biosfiles_us[] = {
348 "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303", "bios_CD_U"
350 static const char * const biosfiles_eu[] = {
351 "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303", "bios_CD_E"
353 static const char * const biosfiles_jp[] = {
354 "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
357 static void make_system_path(char *buf, size_t buf_size,
358 const char *name, const char *ext)
360 const char *dir = NULL;
362 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
363 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
366 snprintf(buf, buf_size, "%s%s", name, ext);
370 static const char *find_bios(int *region, const char *cd_fname)
372 const char * const *files;
373 static char path[256];
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 *);
390 for (i = 0; i < count; i++)
392 make_system_path(path, sizeof(path), files[i], ".bin");
393 f = fopen(path, "rb");
397 make_system_path(path, sizeof(path), files[i], ".zip");
398 f = fopen(path, "rb");
404 lprintf("using bios: %s\n", path);
412 bool retro_load_game(const struct retro_game_info *info)
414 enum media_type_e media_type;
415 static char carthw_path[256];
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");
424 if (info == NULL || info->path == NULL) {
425 lprintf("info->path required\n");
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;
436 disk_current_index = 0;
438 disks[0].fname = strdup(info->path);
440 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
442 media_type = PicoLoadMedia(info->path, carthw_path,
445 switch (media_type) {
447 lprintf("Failed to detect ROM/CD image type.\n");
450 lprintf("Invalid CD image\n");
452 case PM_BAD_CD_NO_BIOS:
453 lprintf("Missing BIOS\n");
456 lprintf("Load error\n");
464 PicoWriteSound = snd_write;
465 memset(sndBuffer, 0, sizeof(sndBuffer));
472 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
477 void retro_unload_game(void)
481 unsigned retro_get_region(void)
483 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
486 void *retro_get_memory_data(unsigned id)
488 if (id != RETRO_MEMORY_SAVE_RAM)
491 if (PicoAHW & PAHW_MCD)
492 return Pico_mcd->bram;
497 size_t retro_get_memory_size(unsigned id)
499 if (id != RETRO_MEMORY_SAVE_RAM)
502 if (PicoAHW & PAHW_MCD)
509 void retro_reset(void)
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,
528 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
530 static void snd_write(int len)
532 audio_batch_cb(PsndOut, len / 4);
537 bool updated = false;
540 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
541 ; //update_variables(true);
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];
553 video_cb(vout_buf, vout_width, vout_height, vout_width * 2);
556 void retro_init(void)
561 emu_log = fopen("/User/Documents/PicoDrive.log", "w");
563 emu_log = fopen("PicoDrive.log", "w");
569 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
571 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
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_MCD_GFX
575 | POPT_EN_32X|POPT_EN_PWM
576 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
578 PicoOpt |= POPT_EN_SVP_DRC;
581 PicoAutoRgnOrder = 0x184; // US, EU, JP
584 p32x_msh2_multiplier = MSH2_MULTI_DEFAULT;
585 p32x_ssh2_multiplier = SSH2_MULTI_DEFAULT;
589 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
592 PicoDrawSetOutFormat(PDF_RGB555, 1);
593 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
595 //PicoMessage = plat_status_msg_busy_next;
596 PicoMCDopenTray = disk_tray_open;
597 PicoMCDcloseTray = disk_tray_close;
600 void retro_deinit(void)