[libpicofe.git] / gp2x / gp2x.c

/**\r
 * All this is mostly based on rlyeh's minimal library.\r
 * Copied here to review all his code and understand what's going on.\r
**/\r
\r
/*\r
\r
  GP2X minimal library v0.A by rlyeh, (c) 2005. emulnation.info@rlyeh (swap it!)\r
\r
  Thanks to Squidge, Robster, snaff, Reesy and NK, for the help & previous work! :-)\r
\r
  License\r
  =======\r
\r
  Free for non-commercial projects (it would be nice receiving a mail from you).\r
  Other cases, ask me first.\r
\r
  GamePark Holdings is not allowed to use this library and/or use parts from it.\r
\r
*/\r
\r
\r
#include <stdio.h>\r
#include <stdlib.h>\r
#include <stdarg.h>\r
#include <string.h>\r
#include <unistd.h>\r
#include <sys/mman.h>\r
#include <sys/types.h>\r
#include <sys/stat.h>\r
#include <sys/ioctl.h>\r
#include <sys/soundcard.h>\r
#include <fcntl.h>\r
#include <errno.h>\r
\r
#include "gp2x.h"\r
#include "usbjoy.h"\r
#include "../common/arm_utils.h"\r
\r
volatile unsigned short *gp2x_memregs;\r
//static\r
volatile unsigned long  *gp2x_memregl;\r
static void *gp2x_screens[4];\r
static int screensel = 0;\r
//static\r
int memdev = 0;\r
static int sounddev = 0, mixerdev = 0;\r
\r
void *gp2x_screen;\r
\r
#define FRAMEBUFF_WHOLESIZE (0x30000*4) // 320*240*2 + some more\r
#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)\r
#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)\r
#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)\r
#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)\r
\r
static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
static int gp2x_screenaddrs_use[4];\r
static unsigned short gp2x_screenaddr_old[4];\r
\r
\r
/* video stuff */\r
void gp2x_video_flip(void)\r
{\r
	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];\r
	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);\r
\r
  	gp2x_memregs[0x2910>>1] = msw;\r
  	gp2x_memregs[0x2914>>1] = msw;\r
	gp2x_memregs[0x290E>>1] = lsw;\r
  	gp2x_memregs[0x2912>>1] = lsw;\r
\r
	// jump to other buffer:\r
	gp2x_screen = gp2x_screens[++screensel&3];\r
}\r
\r
/* doulblebuffered flip */\r
void gp2x_video_flip2(void)\r
{\r
	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);\r
\r
  	gp2x_memregs[0x2910>>1] = msw;\r
  	gp2x_memregs[0x2914>>1] = msw;\r
	gp2x_memregs[0x290E>>1] = 0;\r
  	gp2x_memregs[0x2912>>1] = 0;\r
\r
	// jump to other buffer:\r
	gp2x_screen = gp2x_screens[++screensel&1];\r
}\r
\r
\r
void gp2x_video_changemode2(int bpp)\r
{\r
  	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/\r
  	gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/\r
}\r
\r
\r
void gp2x_video_changemode(int bpp)\r
{\r
	gp2x_video_changemode2(bpp);\r
\r
  	gp2x_memset_all_buffers(0, 0, 320*240*2);\r
	gp2x_video_flip();\r
}\r
\r
\r
void gp2x_video_setpalette(int *pal, int len)\r
{\r
	unsigned short *g=(unsigned short *)pal;\r
	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
	gp2x_memregs[0x2958>>1] = 0;\r
\r
	len *= 2;\r
	while(len--) *memreg=*g++;\r
}\r
\r
\r
// TV Compatible function //\r
void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)\r
{\r
	float escalaw, escalah;\r
	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
	unsigned short scalw;\r
\r
	// set offset\r
	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;\r
	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;\r
	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;\r
	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;\r
\r
	escalaw = 1024.0; // RGB Horiz LCD\r
	escalah = 320.0; // RGB Vert LCD\r
\r
	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
	{\r
		escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
		if (gp2x_memregs[0x2818>>1]  == 287) //PAL\r
			escalah=274.0; // RGB Vert TV PAL\r
		else if (gp2x_memregs[0x2818>>1]  == 239) //NTSC\r
			escalah=331.0; // RGB Vert TV NTSC\r
	}\r
\r
	// scale horizontal\r
	scalw = (unsigned short)((float)escalaw *(W/320.0));\r
	/* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */\r
	if (H != 240 && W == 320) scalw--;\r
	gp2x_memregs[0x2906>>1]=scalw;\r
	// scale vertical\r
	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));\r
}\r
\r
\r
void gp2x_video_wait_vsync(void)\r
{\r
	unsigned short v = gp2x_memregs[0x1182>>1];\r
	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);\r
}\r
\r
\r
void gp2x_video_flush_cache(void)\r
{\r
	// since we are using the mmu hack, we must flush the cache first\r
	// (the params are most likely wrong, but they seem to work somehow)\r
	//flushcache(addr, addr + 320*240*2, 0);\r
	flushcache(gp2x_screen, (char *)gp2x_screen + 320*240*2, 0);\r
}\r
\r
\r
void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
{\r
	char *dst;\r
	if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }\r
	if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }\r
	if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }\r
	if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }\r
}\r
\r
\r
void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
{\r
	gp2x_memcpy_buffers(0xf, data, offset, len);\r
}\r
\r
\r
void gp2x_memset_all_buffers(int offset, int byte, int len)\r
{\r
	memset((char *)gp2x_screens[0] + offset, byte, len);\r
	memset((char *)gp2x_screens[1] + offset, byte, len);\r
	memset((char *)gp2x_screens[2] + offset, byte, len);\r
	memset((char *)gp2x_screens[3] + offset, byte, len);\r
}\r
\r
\r
void gp2x_pd_clone_buffer2(void)\r
{\r
	memcpy(gp2x_screen, gp2x_screens[2], 320*240*2);\r
}\r
\r
\r
unsigned long gp2x_joystick_read(int allow_usb_joy)\r
{\r
	int i;\r
  	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M\r
  	if(value==0xFD) value=0xFA;\r
  	if(value==0xF7) value=0xEB;\r
  	if(value==0xDF) value=0xAF;\r
  	if(value==0x7F) value=0xBE;\r
  	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16)); // C D\r
\r
	if (allow_usb_joy && num_of_joys > 0) {\r
		// check the usb joy as well..\r
		gp2x_usbjoy_update();\r
		for (i = 0; i < num_of_joys; i++)\r
			value |= gp2x_usbjoy_check(i);\r
	}\r
\r
	return value;\r
}\r
\r
static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
\r
void gp2x_start_sound(int rate, int bits, int stereo)\r
{\r
	int frag = 0, bsize, buffers;\r
\r
	// if no settings change, we don't need to do anything\r
	if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
\r
	if (sounddev > 0) close(sounddev);\r
	sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);\r
	if (sounddev == -1)\r
		printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
\r
	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
	ioctl(sounddev, SNDCTL_DSP_SPEED,  &rate);\r
	ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
	// calculate buffer size\r
	buffers = 16;\r
	bsize = rate / 32;\r
	if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding\r
	while ((bsize>>=1)) frag++;\r
	frag |= buffers<<16; // 16 buffers\r
	ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
	usleep(192*1024);\r
\r
	printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
		rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
\r
	s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
}\r
\r
\r
void gp2x_sound_write(void *buff, int len)\r
{\r
	write(sounddev, buff, len);\r
}\r
\r
void gp2x_sound_sync(void)\r
{\r
	ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
}\r
\r
void gp2x_sound_volume(int l, int r)\r
{\r
 	l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
 	l<<=8; l|=r;\r
 	ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/\r
}\r
\r
\r
/* 940 */\r
void Pause940(int yes)\r
{\r
	if(yes)\r
		gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	else\r
		gp2x_memregs[0x0904>>1] |= 1;\r
}\r
\r
\r
void Reset940(int yes, int bank)\r
{\r
	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);\r
}\r
\r
static void proc_set(const char *path, const char *val)\r
{\r
	FILE *f;\r
	char tmp[16];\r
\r
	f = fopen(path, "w");\r
	if (f == NULL) {\r
		printf("failed to open: %s\n", path);\r
		return;\r
	}\r
\r
	fprintf(f, "0\n");\r
	fclose(f);\r
\r
	printf("\"%s\" is set to: ", path);\r
	f = fopen(path, "r");\r
	if (f == NULL) {\r
		printf("(open failed)\n");\r
		return;\r
	}\r
\r
	fgets(tmp, sizeof(tmp), f);\r
	printf("%s", tmp);\r
	fclose(f);\r
}\r
\r
\r
/* common */\r
void gp2x_init(void)\r
{\r
	printf("entering init()\n"); fflush(stdout);\r
\r
  	memdev = open("/dev/mem", O_RDWR);\r
	if (memdev == -1)\r
	{\r
		printf("open(\"/dev/mem\") failed with %i\n", errno);\r
		exit(1);\r
	}\r
\r
	gp2x_memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	printf("memregs are @ %p\n", gp2x_memregs);\r
	if(gp2x_memregs == MAP_FAILED)\r
	{\r
		printf("mmap(memregs) failed with %i\n", errno);\r
		exit(1);\r
	}\r
	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
\r
	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers\r
\r
  	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
	if(gp2x_screens[0] == MAP_FAILED)\r
	{\r
		printf("mmap(gp2x_screen) failed with %i\n", errno);\r
		exit(1);\r
	}\r
	printf("framebuffers point to %p\n", gp2x_screens[0]);\r
	gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
	gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
	gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
\r
	gp2x_screen = gp2x_screens[0];\r
	screensel = 0;\r
\r
	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
\r
	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));\r
	gp2x_memset_all_buffers(0, 0, 320*240*2);\r
\r
	// snd\r
  	mixerdev = open("/dev/mixer", O_RDWR);\r
	if (mixerdev == -1)\r
		printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
\r
	/* init usb joys -GnoStiC */\r
	gp2x_usbjoy_init();\r
\r
	/* disable Linux read-ahead */\r
	proc_set("/proc/sys/vm/max-readahead", "0\n");\r
	proc_set("/proc/sys/vm/min-readahead", "0\n");\r
\r
	printf("exitting init()\n"); fflush(stdout);\r
}\r
\r
char *ext_menu = 0, *ext_state = 0;\r
\r
void gp2x_deinit(void)\r
{\r
	Reset940(1, 3);\r
	Pause940(1);\r
\r
	gp2x_video_changemode(15);\r
	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
\r
	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
	munmap((void *)gp2x_memregs, 0x10000);\r
	close(memdev);\r
	close(mixerdev);\r
	if (sounddev > 0) close(sounddev);\r
\r
	gp2x_usbjoy_deinit();\r
\r
	printf("all done, running ");\r
\r
	// Zaq121's alternative frontend support from MAME\r
	if(ext_menu && ext_state) {\r
		printf("%s -state %s\n", ext_menu, ext_state);\r
		execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	} else if(ext_menu) {\r
		printf("%s\n", ext_menu);\r
		execl(ext_menu, ext_menu, NULL);\r
	} else {\r
		printf("gp2xmenu\n");\r
		chdir("/usr/gp2x");\r
		execl("gp2xmenu", "gp2xmenu", NULL);\r
	}\r
}\r
\r
/* lprintf */\r
void lprintf(const char *fmt, ...)\r
{\r
	va_list vl;\r
\r
	va_start(vl, fmt);\r
	vprintf(fmt, vl);\r
	va_end(vl);\r
}\r
\r
Commit	Line	Data
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
6245d5a0	25	#include <stdarg.h>\r
720ee7f6	26	#include <string.h>\r
	27	#include <unistd.h>\r
	28	#include <sys/mman.h>\r
	29	#include <sys/types.h>\r
	30	#include <sys/stat.h>\r
	31	#include <sys/ioctl.h>\r
	32	#include <sys/soundcard.h>\r
	33	#include <fcntl.h>\r
	34	#include <errno.h>\r
	35	\r
	36	#include "gp2x.h"\r
	37	#include "usbjoy.h"\r
c7a4ff64	38	#include "../common/arm_utils.h"\r
720ee7f6	39	\r
	40	volatile unsigned short *gp2x_memregs;\r
	41	//static\r
	42	volatile unsigned long *gp2x_memregl;\r
	43	static void *gp2x_screens[4];\r
	44	static int screensel = 0;\r
	45	//static\r
	46	int memdev = 0;\r
	47	static int sounddev = 0, mixerdev = 0;\r
	48	\r
	49	void *gp2x_screen;\r
	50	\r
0805b5b4	51	#define FRAMEBUFF_WHOLESIZE (0x300004) // 320240*2 + some more\r
	52	#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)\r
	53	#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)\r
	54	#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)\r
	55	#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)\r
720ee7f6	56	\r
79cad122	57	static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
79cad122	58	static int gp2x_screenaddrs_use[4];\r
4dfd9f42	59	static unsigned short gp2x_screenaddr_old[4];\r
720ee7f6	60	\r
	61	\r
	62	/* video stuff */\r
	63	void gp2x_video_flip(void)\r
	64	{\r
79cad122	65	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];\r
79cad122	66	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);\r
720ee7f6	67	\r
0805b5b4	68	gp2x_memregs[0x2910>>1] = msw;\r
0805b5b4	69	gp2x_memregs[0x2914>>1] = msw;\r
79cad122	70	gp2x_memregs[0x290E>>1] = lsw;\r
79cad122	71	gp2x_memregs[0x2912>>1] = lsw;\r
720ee7f6	72	\r
	73	// jump to other buffer:\r
	74	gp2x_screen = gp2x_screens[++screensel&3];\r
	75	}\r
	76	\r
e5d315a5	77	/* doulblebuffered flip */\r
	78	void gp2x_video_flip2(void)\r
	79	{\r
79cad122	80	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);\r
720ee7f6	81	\r
0805b5b4	82	gp2x_memregs[0x2910>>1] = msw;\r
	83	gp2x_memregs[0x2914>>1] = msw;\r
	84	gp2x_memregs[0x290E>>1] = 0;\r
	85	gp2x_memregs[0x2912>>1] = 0;\r
e5d315a5	86	\r
	87	// jump to other buffer:\r
	88	gp2x_screen = gp2x_screens[++screensel&1];\r
	89	}\r
	90	\r
	91	\r
	92	void gp2x_video_changemode2(int bpp)\r
720ee7f6	93	{\r
	94	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../\r
	95	gp2x_memregs[0x290C>>1]=320((bpp+1)/8); /line width in bytes*/\r
e5d315a5	96	}\r
	97	\r
	98	\r
	99	void gp2x_video_changemode(int bpp)\r
	100	{\r
	101	gp2x_video_changemode2(bpp);\r
720ee7f6	102	\r
0805b5b4	103	gp2x_memset_all_buffers(0, 0, 3202402);\r
720ee7f6	104	gp2x_video_flip();\r
	105	}\r
	106	\r
	107	\r
	108	void gp2x_video_setpalette(int *pal, int len)\r
	109	{\r
	110	unsigned short g=(unsigned short )pal;\r
	111	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
	112	gp2x_memregs[0x2958>>1] = 0;\r
	113	\r
	114	len *= 2;\r
	115	while(len--) memreg=g++;\r
	116	}\r
	117	\r
	118	\r
	119	// TV Compatible function //\r
79cad122	120	void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)\r
720ee7f6	121	{\r
	122	float escalaw, escalah;\r
	123	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
79cad122	124	unsigned short scalw;\r
	125	\r
	126	// set offset\r
	127	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;\r
	128	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;\r
	129	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;\r
	130	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;\r
720ee7f6	131	\r
	132	escalaw = 1024.0; // RGB Horiz LCD\r
	133	escalah = 320.0; // RGB Vert LCD\r
	134	\r
	135	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
	136	{\r
	137	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
	138	if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
	139	escalah=274.0; // RGB Vert TV PAL\r
	140	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
	141	escalah=331.0; // RGB Vert TV NTSC\r
	142	}\r
	143	\r
	144	// scale horizontal\r
79cad122	145	scalw = (unsigned short)((float)escalaw *(W/320.0));\r
	146	/* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */\r
	147	if (H != 240 && W == 320) scalw--;\r
	148	gp2x_memregs[0x2906>>1]=scalw;\r
720ee7f6	149	// scale vertical\r
	150	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));\r
	151	}\r
	152	\r
	153	\r
720ee7f6	154	void gp2x_video_wait_vsync(void)\r
720ee7f6	155	{\r
59d0f042	156	unsigned short v = gp2x_memregs[0x1182>>1];\r
59d0f042	157	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);\r
720ee7f6	158	}\r
	159	\r
	160	\r
13059a60	161	void gp2x_video_flush_cache(void)\r
	162	{\r
	163	// since we are using the mmu hack, we must flush the cache first\r
	164	// (the params are most likely wrong, but they seem to work somehow)\r
	165	//flushcache(addr, addr + 3202402, 0);\r
	166	flushcache(gp2x_screen, (char )gp2x_screen + 320240*2, 0);\r
	167	}\r
	168	\r
	169	\r
4ffd2858	170	void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
4ffd2858	171	{\r
b9f8cb3d	172	char *dst;\r
	173	if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }\r
	174	if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }\r
	175	if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }\r
	176	if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }\r
4ffd2858	177	}\r
	178	\r
	179	\r
720ee7f6	180	void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
720ee7f6	181	{\r
4ffd2858	182	gp2x_memcpy_buffers(0xf, data, offset, len);\r
720ee7f6	183	}\r
	184	\r
	185	\r
	186	void gp2x_memset_all_buffers(int offset, int byte, int len)\r
	187	{\r
	188	memset((char *)gp2x_screens[0] + offset, byte, len);\r
	189	memset((char *)gp2x_screens[1] + offset, byte, len);\r
	190	memset((char *)gp2x_screens[2] + offset, byte, len);\r
	191	memset((char *)gp2x_screens[3] + offset, byte, len);\r
	192	}\r
	193	\r
	194	\r
e5d315a5	195	void gp2x_pd_clone_buffer2(void)\r
e5d315a5	196	{\r
13059a60	197	memcpy(gp2x_screen, gp2x_screens[2], 3202402);\r
e5d315a5	198	}\r
	199	\r
	200	\r
720ee7f6	201	unsigned long gp2x_joystick_read(int allow_usb_joy)\r
	202	{\r
	203	int i;\r
838a5b02	204	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M\r
720ee7f6	205	if(value==0xFD) value=0xFA;\r
	206	if(value==0xF7) value=0xEB;\r
	207	if(value==0xDF) value=0xAF;\r
	208	if(value==0x7F) value=0xBE;\r
838a5b02	209	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) \| value \| (gp2x_memregs[0x1186>>1] << 16)); // C D\r
720ee7f6	210	\r
	211	if (allow_usb_joy && num_of_joys > 0) {\r
	212	// check the usb joy as well..\r
	213	gp2x_usbjoy_update();\r
	214	for (i = 0; i < num_of_joys; i++)\r
	215	value \|= gp2x_usbjoy_check(i);\r
	216	}\r
	217	\r
	218	return value;\r
	219	}\r
	220	\r
	221	static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
	222	\r
	223	void gp2x_start_sound(int rate, int bits, int stereo)\r
	224	{\r
	225	int frag = 0, bsize, buffers;\r
	226	\r
	227	// if no settings change, we don't need to do anything\r
	228	if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
	229	\r
	230	if (sounddev > 0) close(sounddev);\r
	231	sounddev = open("/dev/dsp", O_WRONLY\|O_ASYNC);\r
	232	if (sounddev == -1)\r
	233	printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
	234	\r
720ee7f6	235	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
0480e6c9	236	ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);\r
720ee7f6	237	ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
	238	// calculate buffer size\r
	239	buffers = 16;\r
	240	bsize = rate / 32;\r
	241	if (rate > 22050) { bsize=4; buffers=2; } // 44k mode seems to be very demanding\r
	242	while ((bsize>>=1)) frag++;\r
	243	frag \|= buffers<<16; // 16 buffers\r
	244	ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
0480e6c9	245	usleep(192*1024);\r
0480e6c9	246	\r
720ee7f6	247	printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
	248	rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
	249	\r
	250	s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
720ee7f6	251	}\r
	252	\r
	253	\r
	254	void gp2x_sound_write(void *buff, int len)\r
	255	{\r
	256	write(sounddev, buff, len);\r
	257	}\r
	258	\r
b30a8e67	259	void gp2x_sound_sync(void)\r
	260	{\r
	261	ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
	262	}\r
720ee7f6	263	\r
	264	void gp2x_sound_volume(int l, int r)\r
	265	{\r
	266	l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
	267	l<<=8; l\|=r;\r
	268	ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /SOUND_MIXER_WRITE_VOLUME/\r
	269	}\r
	270	\r
	271	\r
	272	/* 940 */\r
	273	void Pause940(int yes)\r
	274	{\r
	275	if(yes)\r
	276	gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	277	else\r
	278	gp2x_memregs[0x0904>>1] \|= 1;\r
	279	}\r
	280	\r
	281	\r
8dfb9fd5	282	void Reset940(int yes, int bank)\r
720ee7f6	283	{\r
0805b5b4	284	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);\r
720ee7f6	285	}\r
720ee7f6	286	\r
88bfc63d	287	static void proc_set(const char path, const char val)\r
	288	{\r
	289	FILE *f;\r
	290	char tmp[16];\r
	291	\r
	292	f = fopen(path, "w");\r
	293	if (f == NULL) {\r
	294	printf("failed to open: %s\n", path);\r
	295	return;\r
	296	}\r
	297	\r
	298	fprintf(f, "0\n");\r
	299	fclose(f);\r
	300	\r
	301	printf("\"%s\" is set to: ", path);\r
	302	f = fopen(path, "r");\r
	303	if (f == NULL) {\r
	304	printf("(open failed)\n");\r
	305	return;\r
	306	}\r
	307	\r
	308	fgets(tmp, sizeof(tmp), f);\r
	309	printf("%s", tmp);\r
	310	fclose(f);\r
	311	}\r
720ee7f6	312	\r
	313	\r
	314	/* common */\r
	315	void gp2x_init(void)\r
	316	{\r
	317	printf("entering init()\n"); fflush(stdout);\r
	318	\r
	319	memdev = open("/dev/mem", O_RDWR);\r
	320	if (memdev == -1)\r
	321	{\r
	322	printf("open(\"/dev/mem\") failed with %i\n", errno);\r
	323	exit(1);\r
	324	}\r
	325	\r
	326	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	327	printf("memregs are @ %p\n", gp2x_memregs);\r
	328	if(gp2x_memregs == MAP_FAILED)\r
	329	{\r
	330	printf("mmap(memregs) failed with %i\n", errno);\r
	331	exit(1);\r
	332	}\r
	333	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
	334	\r
06796143	335	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers\r
06796143	336	\r
0805b5b4	337	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
0805b5b4	338	if(gp2x_screens[0] == MAP_FAILED)\r
720ee7f6	339	{\r
	340	printf("mmap(gp2x_screen) failed with %i\n", errno);\r
	341	exit(1);\r
	342	}\r
0805b5b4	343	printf("framebuffers point to %p\n", gp2x_screens[0]);\r
	344	gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
	345	gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
	346	gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
720ee7f6	347	\r
	348	gp2x_screen = gp2x_screens[0];\r
	349	screensel = 0;\r
	350	\r
4dfd9f42	351	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
	352	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
	353	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
	354	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
	355	\r
79cad122	356	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));\r
0805b5b4	357	gp2x_memset_all_buffers(0, 0, 3202402);\r
0805b5b4	358	\r
720ee7f6	359	// snd\r
	360	mixerdev = open("/dev/mixer", O_RDWR);\r
	361	if (mixerdev == -1)\r
	362	printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
	363	\r
	364	/* init usb joys -GnoStiC */\r
	365	gp2x_usbjoy_init();\r
	366	\r
88bfc63d	367	/* disable Linux read-ahead */\r
	368	proc_set("/proc/sys/vm/max-readahead", "0\n");\r
	369	proc_set("/proc/sys/vm/min-readahead", "0\n");\r
	370	\r
720ee7f6	371	printf("exitting init()\n"); fflush(stdout);\r
	372	}\r
	373	\r
	374	char ext_menu = 0, ext_state = 0;\r
	375	\r
	376	void gp2x_deinit(void)\r
	377	{\r
8dfb9fd5	378	Reset940(1, 3);\r
720ee7f6	379	Pause940(1);\r
	380	\r
	381	gp2x_video_changemode(15);\r
4dfd9f42	382	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
	383	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
	384	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
	385	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
	386	\r
0805b5b4	387	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
720ee7f6	388	munmap((void *)gp2x_memregs, 0x10000);\r
	389	close(memdev);\r
	390	close(mixerdev);\r
	391	if (sounddev > 0) close(sounddev);\r
	392	\r
	393	gp2x_usbjoy_deinit();\r
	394	\r
	395	printf("all done, running ");\r
	396	\r
	397	// Zaq121's alternative frontend support from MAME\r
	398	if(ext_menu && ext_state) {\r
	399	printf("%s -state %s\n", ext_menu, ext_state);\r
	400	execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	401	} else if(ext_menu) {\r
	402	printf("%s\n", ext_menu);\r
	403	execl(ext_menu, ext_menu, NULL);\r
	404	} else {\r
	405	printf("gp2xmenu\n");\r
	406	chdir("/usr/gp2x");\r
	407	execl("gp2xmenu", "gp2xmenu", NULL);\r
	408	}\r
	409	}\r
	410	\r
6245d5a0	411	/* lprintf */\r
	412	void lprintf(const char *fmt, ...)\r
	413	{\r
	414	va_list vl;\r
	415	\r
	416	va_start(vl, fmt);\r
	417	vprintf(fmt, vl);\r
	418	va_end(vl);\r
	419	}\r
720ee7f6	420	\r