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[libpicofe.git] / gp2x / gp2x.c
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720ee7f6 1/**\r
2 * All this is mostly based on rlyeh's minimal library.\r
3 * Copied here to review all his code and understand what's going on.\r
4**/\r
5\r
6/*\r
7\r
8 GP2X minimal library v0.A by rlyeh, (c) 2005. emulnation.info@rlyeh (swap it!)\r
9\r
10 Thanks to Squidge, Robster, snaff, Reesy and NK, for the help & previous work! :-)\r
11\r
12 License\r
13 =======\r
14\r
15 Free for non-commercial projects (it would be nice receiving a mail from you).\r
16 Other cases, ask me first.\r
17\r
18 GamePark Holdings is not allowed to use this library and/or use parts from it.\r
19\r
20*/\r
21\r
22\r
23#include <stdio.h>\r
24#include <stdlib.h>\r
25#include <string.h>\r
26#include <unistd.h>\r
27#include <sys/mman.h>\r
28#include <sys/types.h>\r
29#include <sys/stat.h>\r
30#include <sys/ioctl.h>\r
31#include <sys/soundcard.h>\r
32#include <fcntl.h>\r
33#include <errno.h>\r
34\r
35#include "gp2x.h"\r
36#include "usbjoy.h"\r
59d0f042 37#include "asmutils.h"\r
720ee7f6 38\r
39volatile unsigned short *gp2x_memregs;\r
40//static\r
41volatile unsigned long *gp2x_memregl;\r
42static void *gp2x_screens[4];\r
43static int screensel = 0;\r
44//static\r
45int memdev = 0;\r
46static int sounddev = 0, mixerdev = 0;\r
47\r
48void *gp2x_screen;\r
49\r
0805b5b4 50#define FRAMEBUFF_WHOLESIZE (0x30000*4) // 320*240*2 + some more\r
51#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)\r
52#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)\r
53#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)\r
54#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)\r
720ee7f6 55\r
79cad122 56static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
57static int gp2x_screenaddrs_use[4];\r
4dfd9f42 58static unsigned short gp2x_screenaddr_old[4];\r
720ee7f6 59\r
60\r
61/* video stuff */\r
62void gp2x_video_flip(void)\r
63{\r
79cad122 64 unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];\r
65 unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);\r
720ee7f6 66\r
0805b5b4 67 gp2x_memregs[0x2910>>1] = msw;\r
68 gp2x_memregs[0x2914>>1] = msw;\r
79cad122 69 gp2x_memregs[0x290E>>1] = lsw;\r
70 gp2x_memregs[0x2912>>1] = lsw;\r
720ee7f6 71\r
72 // jump to other buffer:\r
73 gp2x_screen = gp2x_screens[++screensel&3];\r
74}\r
75\r
e5d315a5 76/* doulblebuffered flip */\r
77void gp2x_video_flip2(void)\r
78{\r
79cad122 79 unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);\r
720ee7f6 80\r
0805b5b4 81 gp2x_memregs[0x2910>>1] = msw;\r
82 gp2x_memregs[0x2914>>1] = msw;\r
83 gp2x_memregs[0x290E>>1] = 0;\r
84 gp2x_memregs[0x2912>>1] = 0;\r
e5d315a5 85\r
86 // jump to other buffer:\r
87 gp2x_screen = gp2x_screens[++screensel&1];\r
88}\r
89\r
90\r
91void gp2x_video_changemode2(int bpp)\r
720ee7f6 92{\r
93 gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/\r
94 gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/\r
e5d315a5 95}\r
96\r
97\r
98void gp2x_video_changemode(int bpp)\r
99{\r
100 gp2x_video_changemode2(bpp);\r
720ee7f6 101\r
0805b5b4 102 gp2x_memset_all_buffers(0, 0, 320*240*2);\r
720ee7f6 103 gp2x_video_flip();\r
104}\r
105\r
106\r
107void gp2x_video_setpalette(int *pal, int len)\r
108{\r
109 unsigned short *g=(unsigned short *)pal;\r
110 volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
111 gp2x_memregs[0x2958>>1] = 0;\r
112\r
113 len *= 2;\r
114 while(len--) *memreg=*g++;\r
115}\r
116\r
117\r
118// TV Compatible function //\r
79cad122 119void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)\r
720ee7f6 120{\r
121 float escalaw, escalah;\r
122 int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
79cad122 123 unsigned short scalw;\r
124\r
125 // set offset\r
126 gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;\r
127 gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;\r
128 gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;\r
129 gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;\r
720ee7f6 130\r
131 escalaw = 1024.0; // RGB Horiz LCD\r
132 escalah = 320.0; // RGB Vert LCD\r
133\r
134 if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
135 {\r
136 escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
137 if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
138 escalah=274.0; // RGB Vert TV PAL\r
139 else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
140 escalah=331.0; // RGB Vert TV NTSC\r
141 }\r
142\r
143 // scale horizontal\r
79cad122 144 scalw = (unsigned short)((float)escalaw *(W/320.0));\r
145 /* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */\r
146 if (H != 240 && W == 320) scalw--;\r
147 gp2x_memregs[0x2906>>1]=scalw;\r
720ee7f6 148 // scale vertical\r
149 gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));\r
150}\r
151\r
152\r
720ee7f6 153void gp2x_video_wait_vsync(void)\r
154{\r
59d0f042 155 unsigned short v = gp2x_memregs[0x1182>>1];\r
156 while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);\r
720ee7f6 157}\r
158\r
159\r
4ffd2858 160void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
161{\r
b9f8cb3d 162 char *dst;\r
163 if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }\r
164 if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }\r
165 if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }\r
166 if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }\r
4ffd2858 167}\r
168\r
169\r
720ee7f6 170void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
171{\r
4ffd2858 172 gp2x_memcpy_buffers(0xf, data, offset, len);\r
720ee7f6 173}\r
174\r
175\r
176void gp2x_memset_all_buffers(int offset, int byte, int len)\r
177{\r
178 memset((char *)gp2x_screens[0] + offset, byte, len);\r
179 memset((char *)gp2x_screens[1] + offset, byte, len);\r
180 memset((char *)gp2x_screens[2] + offset, byte, len);\r
181 memset((char *)gp2x_screens[3] + offset, byte, len);\r
182}\r
183\r
184\r
e5d315a5 185void gp2x_pd_clone_buffer2(void)\r
186{\r
187 memcpy(gp2x_screen, gp2x_screens[2], 320*240);\r
188 memset(gp2x_screen, 0xe0, 320*8);\r
189 memset(gp2x_screen + 320*232, 0xe0, 320*8);\r
190}\r
191\r
192\r
720ee7f6 193unsigned long gp2x_joystick_read(int allow_usb_joy)\r
194{\r
195 int i;\r
196 unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF);\r
197 if(value==0xFD) value=0xFA;\r
198 if(value==0xF7) value=0xEB;\r
199 if(value==0xDF) value=0xAF;\r
200 if(value==0x7F) value=0xBE;\r
201 value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16));\r
202\r
203 if (allow_usb_joy && num_of_joys > 0) {\r
204 // check the usb joy as well..\r
205 gp2x_usbjoy_update();\r
206 for (i = 0; i < num_of_joys; i++)\r
207 value |= gp2x_usbjoy_check(i);\r
208 }\r
209\r
210 return value;\r
211}\r
212\r
213static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
214\r
215void gp2x_start_sound(int rate, int bits, int stereo)\r
216{\r
217 int frag = 0, bsize, buffers;\r
218\r
219 // if no settings change, we don't need to do anything\r
220 if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
221\r
222 if (sounddev > 0) close(sounddev);\r
223 sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);\r
224 if (sounddev == -1)\r
225 printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
226\r
227 ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);\r
228 ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
229 ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
230 // calculate buffer size\r
231 buffers = 16;\r
232 bsize = rate / 32;\r
233 if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding\r
234 while ((bsize>>=1)) frag++;\r
235 frag |= buffers<<16; // 16 buffers\r
236 ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
237 printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
238 rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
239\r
240 s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
241 usleep(100000);\r
242}\r
243\r
244\r
245void gp2x_sound_write(void *buff, int len)\r
246{\r
247 write(sounddev, buff, len);\r
248}\r
249\r
b30a8e67 250void gp2x_sound_sync(void)\r
251{\r
252 ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
253}\r
720ee7f6 254\r
255void gp2x_sound_volume(int l, int r)\r
256{\r
257 l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
258 l<<=8; l|=r;\r
259 ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/\r
260}\r
261\r
262\r
263/* 940 */\r
264void Pause940(int yes)\r
265{\r
266 if(yes)\r
267 gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
268 else\r
269 gp2x_memregs[0x0904>>1] |= 1;\r
270}\r
271\r
272\r
8dfb9fd5 273void Reset940(int yes, int bank)\r
720ee7f6 274{\r
0805b5b4 275 gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);\r
720ee7f6 276}\r
277\r
278\r
279\r
280/* common */\r
281void gp2x_init(void)\r
282{\r
283 printf("entering init()\n"); fflush(stdout);\r
284\r
285 memdev = open("/dev/mem", O_RDWR);\r
286 if (memdev == -1)\r
287 {\r
288 printf("open(\"/dev/mem\") failed with %i\n", errno);\r
289 exit(1);\r
290 }\r
291\r
292 gp2x_memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
293 printf("memregs are @ %p\n", gp2x_memregs);\r
294 if(gp2x_memregs == MAP_FAILED)\r
295 {\r
296 printf("mmap(memregs) failed with %i\n", errno);\r
297 exit(1);\r
298 }\r
299 gp2x_memregl = (unsigned long *) gp2x_memregs;\r
300\r
0805b5b4 301 gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
302 if(gp2x_screens[0] == MAP_FAILED)\r
720ee7f6 303 {\r
304 printf("mmap(gp2x_screen) failed with %i\n", errno);\r
305 exit(1);\r
306 }\r
0805b5b4 307 printf("framebuffers point to %p\n", gp2x_screens[0]);\r
308 gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
309 gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
310 gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
720ee7f6 311\r
312 gp2x_screen = gp2x_screens[0];\r
313 screensel = 0;\r
314\r
4dfd9f42 315 gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
316 gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
317 gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
318 gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
319\r
79cad122 320 memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));\r
0805b5b4 321 gp2x_memset_all_buffers(0, 0, 320*240*2);\r
322\r
720ee7f6 323 // snd\r
324 mixerdev = open("/dev/mixer", O_RDWR);\r
325 if (mixerdev == -1)\r
326 printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
327\r
328 /* init usb joys -GnoStiC */\r
329 gp2x_usbjoy_init();\r
330\r
331 printf("exitting init()\n"); fflush(stdout);\r
332}\r
333\r
334char *ext_menu = 0, *ext_state = 0;\r
335\r
336void gp2x_deinit(void)\r
337{\r
8dfb9fd5 338 Reset940(1, 3);\r
720ee7f6 339 Pause940(1);\r
340\r
341 gp2x_video_changemode(15);\r
4dfd9f42 342 gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
343 gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
344 gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
345 gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
346\r
0805b5b4 347 munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
720ee7f6 348 munmap((void *)gp2x_memregs, 0x10000);\r
349 close(memdev);\r
350 close(mixerdev);\r
351 if (sounddev > 0) close(sounddev);\r
352\r
353 gp2x_usbjoy_deinit();\r
354\r
355 printf("all done, running ");\r
356\r
357 // Zaq121's alternative frontend support from MAME\r
358 if(ext_menu && ext_state) {\r
359 printf("%s -state %s\n", ext_menu, ext_state);\r
360 execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
361 } else if(ext_menu) {\r
362 printf("%s\n", ext_menu);\r
363 execl(ext_menu, ext_menu, NULL);\r
364 } else {\r
365 printf("gp2xmenu\n");\r
366 chdir("/usr/gp2x");\r
367 execl("gp2xmenu", "gp2xmenu", NULL);\r
368 }\r
369}\r
370\r
371\r
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