[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 = -1, mixerdev = -1, touchdev = -1;\r
static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };\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
typedef struct ucb1x00_ts_event\r
{\r
	unsigned short pressure;\r
	unsigned short x;\r
	unsigned short y;\r
	unsigned short pad;\r
	struct timeval stamp;\r
} UCB1X00_TS_EVENT;\r
\r
int gp2x_touchpad_read(int *x, int *y)\r
{\r
	UCB1X00_TS_EVENT event;\r
	static int zero_seen = 0;\r
	int retval;\r
\r
	if (touchdev < 0) return -1;\r
\r
	retval = read(touchdev, &event, sizeof(event));\r
	if (retval <= 0) {\r
		printf("touch read failed %i %i\n", retval, errno);\r
		return -1;\r
	}\r
	// this is to ignore the messed-up 4.1.x driver\r
	if (event.pressure == 0) zero_seen = 1;\r
\r
	if (x) *x = (event.x * touchcal[0] + touchcal[2]) >> 16;\r
	if (y) *y = (event.y * touchcal[4] + touchcal[5]) >> 16;\r
	// printf("read %i %i %i\n", event.pressure, *x, *y);\r
\r
	return zero_seen ? event.pressure : 0;\r
}\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
	// touchscreen\r
	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);\r
	if (touchdev >= 0) {\r
		FILE *pcf = fopen("/etc/pointercal", "r");\r
		if (pcf) {\r
			fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],\r
				&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);\r
			fclose(pcf);\r
		}\r
		printf("found touchscreen/wm97xx\n");\r
	}\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
	if (touchdev >= 0) close(touchdev);\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
3f2aaff2	47	static int sounddev = -1, mixerdev = -1, touchdev = -1;\r
3f2aaff2	48	static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };\r
720ee7f6	49	\r
	50	void *gp2x_screen;\r
	51	\r
0805b5b4	52	#define FRAMEBUFF_WHOLESIZE (0x300004) // 320240*2 + some more\r
	53	#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)\r
	54	#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)\r
	55	#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)\r
	56	#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)\r
720ee7f6	57	\r
79cad122	58	static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
79cad122	59	static int gp2x_screenaddrs_use[4];\r
4dfd9f42	60	static unsigned short gp2x_screenaddr_old[4];\r
720ee7f6	61	\r
	62	\r
	63	/* video stuff */\r
	64	void gp2x_video_flip(void)\r
	65	{\r
79cad122	66	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];\r
79cad122	67	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);\r
720ee7f6	68	\r
0805b5b4	69	gp2x_memregs[0x2910>>1] = msw;\r
0805b5b4	70	gp2x_memregs[0x2914>>1] = msw;\r
79cad122	71	gp2x_memregs[0x290E>>1] = lsw;\r
79cad122	72	gp2x_memregs[0x2912>>1] = lsw;\r
720ee7f6	73	\r
	74	// jump to other buffer:\r
	75	gp2x_screen = gp2x_screens[++screensel&3];\r
	76	}\r
	77	\r
e5d315a5	78	/* doulblebuffered flip */\r
	79	void gp2x_video_flip2(void)\r
	80	{\r
79cad122	81	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);\r
720ee7f6	82	\r
0805b5b4	83	gp2x_memregs[0x2910>>1] = msw;\r
	84	gp2x_memregs[0x2914>>1] = msw;\r
	85	gp2x_memregs[0x290E>>1] = 0;\r
	86	gp2x_memregs[0x2912>>1] = 0;\r
e5d315a5	87	\r
	88	// jump to other buffer:\r
	89	gp2x_screen = gp2x_screens[++screensel&1];\r
	90	}\r
	91	\r
	92	\r
	93	void gp2x_video_changemode2(int bpp)\r
720ee7f6	94	{\r
	95	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../\r
	96	gp2x_memregs[0x290C>>1]=320((bpp+1)/8); /line width in bytes*/\r
e5d315a5	97	}\r
	98	\r
	99	\r
	100	void gp2x_video_changemode(int bpp)\r
	101	{\r
	102	gp2x_video_changemode2(bpp);\r
720ee7f6	103	\r
0805b5b4	104	gp2x_memset_all_buffers(0, 0, 3202402);\r
720ee7f6	105	gp2x_video_flip();\r
	106	}\r
	107	\r
	108	\r
	109	void gp2x_video_setpalette(int *pal, int len)\r
	110	{\r
	111	unsigned short g=(unsigned short )pal;\r
	112	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
	113	gp2x_memregs[0x2958>>1] = 0;\r
	114	\r
	115	len *= 2;\r
	116	while(len--) memreg=g++;\r
	117	}\r
	118	\r
	119	\r
	120	// TV Compatible function //\r
79cad122	121	void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)\r
720ee7f6	122	{\r
	123	float escalaw, escalah;\r
	124	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
79cad122	125	unsigned short scalw;\r
	126	\r
	127	// set offset\r
	128	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;\r
	129	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;\r
	130	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;\r
	131	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;\r
720ee7f6	132	\r
	133	escalaw = 1024.0; // RGB Horiz LCD\r
	134	escalah = 320.0; // RGB Vert LCD\r
	135	\r
	136	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
	137	{\r
	138	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
	139	if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
	140	escalah=274.0; // RGB Vert TV PAL\r
	141	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
	142	escalah=331.0; // RGB Vert TV NTSC\r
	143	}\r
	144	\r
	145	// scale horizontal\r
79cad122	146	scalw = (unsigned short)((float)escalaw *(W/320.0));\r
	147	/* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */\r
	148	if (H != 240 && W == 320) scalw--;\r
	149	gp2x_memregs[0x2906>>1]=scalw;\r
720ee7f6	150	// scale vertical\r
	151	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));\r
	152	}\r
	153	\r
	154	\r
720ee7f6	155	void gp2x_video_wait_vsync(void)\r
720ee7f6	156	{\r
59d0f042	157	unsigned short v = gp2x_memregs[0x1182>>1];\r
59d0f042	158	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);\r
720ee7f6	159	}\r
	160	\r
	161	\r
13059a60	162	void gp2x_video_flush_cache(void)\r
	163	{\r
	164	// since we are using the mmu hack, we must flush the cache first\r
	165	// (the params are most likely wrong, but they seem to work somehow)\r
	166	//flushcache(addr, addr + 3202402, 0);\r
	167	flushcache(gp2x_screen, (char )gp2x_screen + 320240*2, 0);\r
	168	}\r
	169	\r
	170	\r
4ffd2858	171	void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
4ffd2858	172	{\r
b9f8cb3d	173	char *dst;\r
	174	if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }\r
	175	if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }\r
	176	if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }\r
	177	if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }\r
4ffd2858	178	}\r
	179	\r
	180	\r
720ee7f6	181	void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
720ee7f6	182	{\r
4ffd2858	183	gp2x_memcpy_buffers(0xf, data, offset, len);\r
720ee7f6	184	}\r
	185	\r
	186	\r
	187	void gp2x_memset_all_buffers(int offset, int byte, int len)\r
	188	{\r
	189	memset((char *)gp2x_screens[0] + offset, byte, len);\r
	190	memset((char *)gp2x_screens[1] + offset, byte, len);\r
	191	memset((char *)gp2x_screens[2] + offset, byte, len);\r
	192	memset((char *)gp2x_screens[3] + offset, byte, len);\r
	193	}\r
	194	\r
	195	\r
e5d315a5	196	void gp2x_pd_clone_buffer2(void)\r
e5d315a5	197	{\r
13059a60	198	memcpy(gp2x_screen, gp2x_screens[2], 3202402);\r
e5d315a5	199	}\r
	200	\r
	201	\r
720ee7f6	202	unsigned long gp2x_joystick_read(int allow_usb_joy)\r
	203	{\r
	204	int i;\r
838a5b02	205	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M\r
720ee7f6	206	if(value==0xFD) value=0xFA;\r
	207	if(value==0xF7) value=0xEB;\r
	208	if(value==0xDF) value=0xAF;\r
	209	if(value==0x7F) value=0xBE;\r
838a5b02	210	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) \| value \| (gp2x_memregs[0x1186>>1] << 16)); // C D\r
720ee7f6	211	\r
	212	if (allow_usb_joy && num_of_joys > 0) {\r
	213	// check the usb joy as well..\r
	214	gp2x_usbjoy_update();\r
	215	for (i = 0; i < num_of_joys; i++)\r
	216	value \|= gp2x_usbjoy_check(i);\r
	217	}\r
	218	\r
	219	return value;\r
	220	}\r
	221	\r
3f2aaff2	222	typedef struct ucb1x00_ts_event\r
	223	{\r
	224	unsigned short pressure;\r
	225	unsigned short x;\r
	226	unsigned short y;\r
	227	unsigned short pad;\r
	228	struct timeval stamp;\r
	229	} UCB1X00_TS_EVENT;\r
	230	\r
	231	int gp2x_touchpad_read(int x, int y)\r
	232	{\r
	233	UCB1X00_TS_EVENT event;\r
6589c840	234	static int zero_seen = 0;\r
3f2aaff2	235	int retval;\r
	236	\r
	237	if (touchdev < 0) return -1;\r
	238	\r
	239	retval = read(touchdev, &event, sizeof(event));\r
dfa8d77a	240	if (retval <= 0) {\r
3f2aaff2	241	printf("touch read failed %i %i\n", retval, errno);\r
	242	return -1;\r
	243	}\r
6589c840	244	// this is to ignore the messed-up 4.1.x driver\r
dfa8d77a	245	if (event.pressure == 0) zero_seen = 1;\r
3f2aaff2	246	\r
	247	if (x) x = (event.x touchcal[0] + touchcal[2]) >> 16;\r
	248	if (y) y = (event.y touchcal[4] + touchcal[5]) >> 16;\r
	249	// printf("read %i %i %i\n", event.pressure, x, y);\r
	250	\r
6589c840	251	return zero_seen ? event.pressure : 0;\r
3f2aaff2	252	}\r
	253	\r
	254	\r
720ee7f6	255	static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
	256	\r
	257	void gp2x_start_sound(int rate, int bits, int stereo)\r
	258	{\r
	259	int frag = 0, bsize, buffers;\r
	260	\r
	261	// if no settings change, we don't need to do anything\r
	262	if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
	263	\r
	264	if (sounddev > 0) close(sounddev);\r
	265	sounddev = open("/dev/dsp", O_WRONLY\|O_ASYNC);\r
	266	if (sounddev == -1)\r
	267	printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
	268	\r
720ee7f6	269	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
0480e6c9	270	ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);\r
720ee7f6	271	ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
	272	// calculate buffer size\r
	273	buffers = 16;\r
	274	bsize = rate / 32;\r
	275	if (rate > 22050) { bsize=4; buffers=2; } // 44k mode seems to be very demanding\r
	276	while ((bsize>>=1)) frag++;\r
	277	frag \|= buffers<<16; // 16 buffers\r
	278	ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
0480e6c9	279	usleep(192*1024);\r
0480e6c9	280	\r
720ee7f6	281	printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
	282	rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
	283	\r
	284	s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
720ee7f6	285	}\r
	286	\r
	287	\r
	288	void gp2x_sound_write(void *buff, int len)\r
	289	{\r
	290	write(sounddev, buff, len);\r
	291	}\r
	292	\r
b30a8e67	293	void gp2x_sound_sync(void)\r
	294	{\r
	295	ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
	296	}\r
720ee7f6	297	\r
	298	void gp2x_sound_volume(int l, int r)\r
	299	{\r
	300	l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
	301	l<<=8; l\|=r;\r
	302	ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /SOUND_MIXER_WRITE_VOLUME/\r
	303	}\r
	304	\r
	305	\r
	306	/* 940 */\r
	307	void Pause940(int yes)\r
	308	{\r
	309	if(yes)\r
	310	gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	311	else\r
	312	gp2x_memregs[0x0904>>1] \|= 1;\r
	313	}\r
	314	\r
	315	\r
8dfb9fd5	316	void Reset940(int yes, int bank)\r
720ee7f6	317	{\r
0805b5b4	318	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);\r
720ee7f6	319	}\r
720ee7f6	320	\r
88bfc63d	321	static void proc_set(const char path, const char val)\r
	322	{\r
	323	FILE *f;\r
	324	char tmp[16];\r
	325	\r
	326	f = fopen(path, "w");\r
	327	if (f == NULL) {\r
	328	printf("failed to open: %s\n", path);\r
	329	return;\r
	330	}\r
	331	\r
	332	fprintf(f, "0\n");\r
	333	fclose(f);\r
	334	\r
	335	printf("\"%s\" is set to: ", path);\r
	336	f = fopen(path, "r");\r
	337	if (f == NULL) {\r
	338	printf("(open failed)\n");\r
	339	return;\r
	340	}\r
	341	\r
	342	fgets(tmp, sizeof(tmp), f);\r
	343	printf("%s", tmp);\r
	344	fclose(f);\r
	345	}\r
720ee7f6	346	\r
	347	\r
	348	/* common */\r
	349	void gp2x_init(void)\r
	350	{\r
	351	printf("entering init()\n"); fflush(stdout);\r
	352	\r
	353	memdev = open("/dev/mem", O_RDWR);\r
	354	if (memdev == -1)\r
	355	{\r
	356	printf("open(\"/dev/mem\") failed with %i\n", errno);\r
	357	exit(1);\r
	358	}\r
	359	\r
	360	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	361	printf("memregs are @ %p\n", gp2x_memregs);\r
	362	if(gp2x_memregs == MAP_FAILED)\r
	363	{\r
	364	printf("mmap(memregs) failed with %i\n", errno);\r
	365	exit(1);\r
	366	}\r
	367	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
	368	\r
06796143	369	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers\r
06796143	370	\r
0805b5b4	371	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
0805b5b4	372	if(gp2x_screens[0] == MAP_FAILED)\r
720ee7f6	373	{\r
	374	printf("mmap(gp2x_screen) failed with %i\n", errno);\r
	375	exit(1);\r
	376	}\r
0805b5b4	377	printf("framebuffers point to %p\n", gp2x_screens[0]);\r
	378	gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
	379	gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
	380	gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
720ee7f6	381	\r
	382	gp2x_screen = gp2x_screens[0];\r
	383	screensel = 0;\r
	384	\r
4dfd9f42	385	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
	386	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
	387	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
	388	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
	389	\r
79cad122	390	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));\r
0805b5b4	391	gp2x_memset_all_buffers(0, 0, 3202402);\r
0805b5b4	392	\r
720ee7f6	393	// snd\r
	394	mixerdev = open("/dev/mixer", O_RDWR);\r
	395	if (mixerdev == -1)\r
	396	printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
	397	\r
	398	/* init usb joys -GnoStiC */\r
	399	gp2x_usbjoy_init();\r
	400	\r
3f2aaff2	401	// touchscreen\r
	402	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);\r
	403	if (touchdev >= 0) {\r
	404	FILE *pcf = fopen("/etc/pointercal", "r");\r
	405	if (pcf) {\r
	406	fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],\r
	407	&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);\r
	408	fclose(pcf);\r
	409	}\r
	410	printf("found touchscreen/wm97xx\n");\r
	411	}\r
	412	\r
88bfc63d	413	/* disable Linux read-ahead */\r
	414	proc_set("/proc/sys/vm/max-readahead", "0\n");\r
	415	proc_set("/proc/sys/vm/min-readahead", "0\n");\r
	416	\r
720ee7f6	417	printf("exitting init()\n"); fflush(stdout);\r
	418	}\r
	419	\r
	420	char ext_menu = 0, ext_state = 0;\r
	421	\r
	422	void gp2x_deinit(void)\r
	423	{\r
8dfb9fd5	424	Reset940(1, 3);\r
720ee7f6	425	Pause940(1);\r
	426	\r
	427	gp2x_video_changemode(15);\r
4dfd9f42	428	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
	429	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
	430	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
	431	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
	432	\r
0805b5b4	433	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
720ee7f6	434	munmap((void *)gp2x_memregs, 0x10000);\r
	435	close(memdev);\r
	436	close(mixerdev);\r
3f2aaff2	437	if (sounddev >= 0) close(sounddev);\r
3f2aaff2	438	if (touchdev >= 0) close(touchdev);\r
720ee7f6	439	\r
	440	gp2x_usbjoy_deinit();\r
	441	\r
	442	printf("all done, running ");\r
	443	\r
	444	// Zaq121's alternative frontend support from MAME\r
	445	if(ext_menu && ext_state) {\r
	446	printf("%s -state %s\n", ext_menu, ext_state);\r
	447	execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	448	} else if(ext_menu) {\r
	449	printf("%s\n", ext_menu);\r
	450	execl(ext_menu, ext_menu, NULL);\r
	451	} else {\r
	452	printf("gp2xmenu\n");\r
	453	chdir("/usr/gp2x");\r
	454	execl("gp2xmenu", "gp2xmenu", NULL);\r
	455	}\r
	456	}\r
	457	\r
6245d5a0	458	/* lprintf */\r
	459	void lprintf(const char *fmt, ...)\r
	460	{\r
	461	va_list vl;\r
	462	\r
	463	va_start(vl, fmt);\r
	464	vprintf(fmt, vl);\r
	465	va_end(vl);\r
	466	}\r
720ee7f6	467	\r