[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 <fcntl.h>\r
#include <errno.h>\r
\r
#include "gp2x.h"\r
#include "../linux/sndout_oss.h"\r
#include "../common/arm_utils.h"\r
#include "../common/arm_linux.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 touchdev = -1;\r
static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };\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
	g_screen_ptr = 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
	g_screen_ptr = 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
	cache_flush_d_inval_i(g_screen_ptr, (char *)g_screen_ptr + 320*240*2);\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(g_screen_ptr, gp2x_screens[2], 320*240*2);\r
}\r
\r
\r
unsigned long gp2x_joystick_read(int unused)\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
	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
/* 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
		perror("open(\"/dev/mem\")");\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
		perror("mmap(memregs)");\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
		perror("mmap(g_screen_ptr)");\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
	g_screen_ptr = 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
	sndout_oss_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
	if (touchdev >= 0) close(touchdev);\r
\r
	sndout_oss_exit();\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
720ee7f6	31	#include <fcntl.h>\r
	32	#include <errno.h>\r
	33	\r
	34	#include "gp2x.h"\r
b3972d82	35	#include "../linux/sndout_oss.h"\r
c7a4ff64	36	#include "../common/arm_utils.h"\r
095a240b	37	#include "../common/arm_linux.h"\r
720ee7f6	38	\r
	39	volatile unsigned short *gp2x_memregs;\r
	40	//static\r
	41	volatile unsigned long *gp2x_memregl;\r
	42	static void *gp2x_screens[4];\r
	43	static int screensel = 0;\r
	44	//static\r
	45	int memdev = 0;\r
b3972d82	46	static int touchdev = -1;\r
3f2aaff2	47	static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };\r
720ee7f6	48	\r
0805b5b4	49	#define FRAMEBUFF_WHOLESIZE (0x300004) // 320240*2 + some more\r
	50	#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)\r
	51	#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)\r
	52	#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)\r
	53	#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)\r
720ee7f6	54	\r
79cad122	55	static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
79cad122	56	static int gp2x_screenaddrs_use[4];\r
4dfd9f42	57	static unsigned short gp2x_screenaddr_old[4];\r
720ee7f6	58	\r
	59	\r
	60	/* video stuff */\r
	61	void gp2x_video_flip(void)\r
	62	{\r
79cad122	63	unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];\r
79cad122	64	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);\r
720ee7f6	65	\r
0805b5b4	66	gp2x_memregs[0x2910>>1] = msw;\r
0805b5b4	67	gp2x_memregs[0x2914>>1] = msw;\r
79cad122	68	gp2x_memregs[0x290E>>1] = lsw;\r
79cad122	69	gp2x_memregs[0x2912>>1] = lsw;\r
720ee7f6	70	\r
720ee7f6	71	// jump to other buffer:\r
e31266dd	72	g_screen_ptr = gp2x_screens[++screensel&3];\r
720ee7f6	73	}\r
720ee7f6	74	\r
e5d315a5	75	/* doulblebuffered flip */\r
	76	void gp2x_video_flip2(void)\r
	77	{\r
79cad122	78	unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);\r
720ee7f6	79	\r
0805b5b4	80	gp2x_memregs[0x2910>>1] = msw;\r
	81	gp2x_memregs[0x2914>>1] = msw;\r
	82	gp2x_memregs[0x290E>>1] = 0;\r
	83	gp2x_memregs[0x2912>>1] = 0;\r
e5d315a5	84	\r
e5d315a5	85	// jump to other buffer:\r
e31266dd	86	g_screen_ptr = gp2x_screens[++screensel&1];\r
e5d315a5	87	}\r
	88	\r
	89	\r
	90	void gp2x_video_changemode2(int bpp)\r
720ee7f6	91	{\r
	92	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../\r
	93	gp2x_memregs[0x290C>>1]=320((bpp+1)/8); /line width in bytes*/\r
e5d315a5	94	}\r
	95	\r
	96	\r
	97	void gp2x_video_changemode(int bpp)\r
	98	{\r
	99	gp2x_video_changemode2(bpp);\r
720ee7f6	100	\r
0805b5b4	101	gp2x_memset_all_buffers(0, 0, 3202402);\r
720ee7f6	102	gp2x_video_flip();\r
	103	}\r
	104	\r
	105	\r
	106	void gp2x_video_setpalette(int *pal, int len)\r
	107	{\r
	108	unsigned short g=(unsigned short )pal;\r
	109	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
	110	gp2x_memregs[0x2958>>1] = 0;\r
	111	\r
	112	len *= 2;\r
	113	while(len--) memreg=g++;\r
	114	}\r
	115	\r
	116	\r
	117	// TV Compatible function //\r
79cad122	118	void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)\r
720ee7f6	119	{\r
	120	float escalaw, escalah;\r
	121	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
79cad122	122	unsigned short scalw;\r
	123	\r
	124	// set offset\r
	125	gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;\r
	126	gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;\r
	127	gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;\r
	128	gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;\r
720ee7f6	129	\r
	130	escalaw = 1024.0; // RGB Horiz LCD\r
	131	escalah = 320.0; // RGB Vert LCD\r
	132	\r
	133	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
	134	{\r
	135	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
	136	if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
	137	escalah=274.0; // RGB Vert TV PAL\r
	138	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
	139	escalah=331.0; // RGB Vert TV NTSC\r
	140	}\r
	141	\r
	142	// scale horizontal\r
79cad122	143	scalw = (unsigned short)((float)escalaw *(W/320.0));\r
	144	/* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */\r
	145	if (H != 240 && W == 320) scalw--;\r
	146	gp2x_memregs[0x2906>>1]=scalw;\r
720ee7f6	147	// scale vertical\r
	148	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));\r
	149	}\r
	150	\r
	151	\r
720ee7f6	152	void gp2x_video_wait_vsync(void)\r
720ee7f6	153	{\r
59d0f042	154	unsigned short v = gp2x_memregs[0x1182>>1];\r
59d0f042	155	while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);\r
720ee7f6	156	}\r
	157	\r
	158	\r
13059a60	159	void gp2x_video_flush_cache(void)\r
	160	{\r
	161	// since we are using the mmu hack, we must flush the cache first\r
e31266dd	162	cache_flush_d_inval_i(g_screen_ptr, (char )g_screen_ptr + 320240*2);\r
13059a60	163	}\r
	164	\r
	165	\r
4ffd2858	166	void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
4ffd2858	167	{\r
b9f8cb3d	168	char *dst;\r
	169	if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }\r
	170	if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }\r
	171	if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }\r
	172	if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }\r
4ffd2858	173	}\r
	174	\r
	175	\r
720ee7f6	176	void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
720ee7f6	177	{\r
4ffd2858	178	gp2x_memcpy_buffers(0xf, data, offset, len);\r
720ee7f6	179	}\r
	180	\r
	181	\r
	182	void gp2x_memset_all_buffers(int offset, int byte, int len)\r
	183	{\r
	184	memset((char *)gp2x_screens[0] + offset, byte, len);\r
	185	memset((char *)gp2x_screens[1] + offset, byte, len);\r
	186	memset((char *)gp2x_screens[2] + offset, byte, len);\r
	187	memset((char *)gp2x_screens[3] + offset, byte, len);\r
	188	}\r
	189	\r
	190	\r
e5d315a5	191	void gp2x_pd_clone_buffer2(void)\r
e5d315a5	192	{\r
e31266dd	193	memcpy(g_screen_ptr, gp2x_screens[2], 3202402);\r
e5d315a5	194	}\r
	195	\r
	196	\r
e31266dd	197	unsigned long gp2x_joystick_read(int unused)\r
720ee7f6	198	{\r
720ee7f6	199	int i;\r
838a5b02	200	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M\r
720ee7f6	201	if(value==0xFD) value=0xFA;\r
	202	if(value==0xF7) value=0xEB;\r
	203	if(value==0xDF) value=0xAF;\r
	204	if(value==0x7F) value=0xBE;\r
838a5b02	205	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) \| value \| (gp2x_memregs[0x1186>>1] << 16)); // C D\r
720ee7f6	206	\r
720ee7f6	207	return value;\r
	208	}\r
	209	\r
3f2aaff2	210	typedef struct ucb1x00_ts_event\r
	211	{\r
	212	unsigned short pressure;\r
	213	unsigned short x;\r
	214	unsigned short y;\r
	215	unsigned short pad;\r
	216	struct timeval stamp;\r
	217	} UCB1X00_TS_EVENT;\r
	218	\r
	219	int gp2x_touchpad_read(int x, int y)\r
	220	{\r
	221	UCB1X00_TS_EVENT event;\r
6589c840	222	static int zero_seen = 0;\r
3f2aaff2	223	int retval;\r
	224	\r
	225	if (touchdev < 0) return -1;\r
	226	\r
	227	retval = read(touchdev, &event, sizeof(event));\r
dfa8d77a	228	if (retval <= 0) {\r
3f2aaff2	229	printf("touch read failed %i %i\n", retval, errno);\r
	230	return -1;\r
	231	}\r
6589c840	232	// this is to ignore the messed-up 4.1.x driver\r
dfa8d77a	233	if (event.pressure == 0) zero_seen = 1;\r
3f2aaff2	234	\r
	235	if (x) x = (event.x touchcal[0] + touchcal[2]) >> 16;\r
	236	if (y) y = (event.y touchcal[4] + touchcal[5]) >> 16;\r
	237	// printf("read %i %i %i\n", event.pressure, x, y);\r
	238	\r
6589c840	239	return zero_seen ? event.pressure : 0;\r
3f2aaff2	240	}\r
	241	\r
	242	\r
720ee7f6	243	/* 940 */\r
	244	void Pause940(int yes)\r
	245	{\r
	246	if(yes)\r
	247	gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	248	else\r
	249	gp2x_memregs[0x0904>>1] \|= 1;\r
	250	}\r
	251	\r
	252	\r
8dfb9fd5	253	void Reset940(int yes, int bank)\r
720ee7f6	254	{\r
0805b5b4	255	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);\r
720ee7f6	256	}\r
720ee7f6	257	\r
88bfc63d	258	static void proc_set(const char path, const char val)\r
	259	{\r
	260	FILE *f;\r
	261	char tmp[16];\r
	262	\r
	263	f = fopen(path, "w");\r
	264	if (f == NULL) {\r
	265	printf("failed to open: %s\n", path);\r
	266	return;\r
	267	}\r
	268	\r
	269	fprintf(f, "0\n");\r
	270	fclose(f);\r
	271	\r
	272	printf("\"%s\" is set to: ", path);\r
	273	f = fopen(path, "r");\r
	274	if (f == NULL) {\r
	275	printf("(open failed)\n");\r
	276	return;\r
	277	}\r
	278	\r
	279	fgets(tmp, sizeof(tmp), f);\r
	280	printf("%s", tmp);\r
	281	fclose(f);\r
	282	}\r
720ee7f6	283	\r
	284	\r
	285	/* common */\r
	286	void gp2x_init(void)\r
	287	{\r
	288	printf("entering init()\n"); fflush(stdout);\r
	289	\r
	290	memdev = open("/dev/mem", O_RDWR);\r
	291	if (memdev == -1)\r
	292	{\r
b3972d82	293	perror("open(\"/dev/mem\")");\r
720ee7f6	294	exit(1);\r
	295	}\r
	296	\r
	297	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	298	printf("memregs are @ %p\n", gp2x_memregs);\r
	299	if(gp2x_memregs == MAP_FAILED)\r
	300	{\r
b3972d82	301	perror("mmap(memregs)");\r
720ee7f6	302	exit(1);\r
	303	}\r
	304	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
	305	\r
06796143	306	gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers\r
06796143	307	\r
0805b5b4	308	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
0805b5b4	309	if(gp2x_screens[0] == MAP_FAILED)\r
720ee7f6	310	{\r
e31266dd	311	perror("mmap(g_screen_ptr)");\r
720ee7f6	312	exit(1);\r
720ee7f6	313	}\r
0805b5b4	314	printf("framebuffers point to %p\n", gp2x_screens[0]);\r
	315	gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
	316	gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
	317	gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
720ee7f6	318	\r
e31266dd	319	g_screen_ptr = gp2x_screens[0];\r
720ee7f6	320	screensel = 0;\r
720ee7f6	321	\r
4dfd9f42	322	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
	323	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
	324	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
	325	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
	326	\r
79cad122	327	memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));\r
0805b5b4	328	gp2x_memset_all_buffers(0, 0, 3202402);\r
0805b5b4	329	\r
720ee7f6	330	// snd\r
b3972d82	331	sndout_oss_init();\r
720ee7f6	332	\r
3f2aaff2	333	// touchscreen\r
	334	touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);\r
	335	if (touchdev >= 0) {\r
	336	FILE *pcf = fopen("/etc/pointercal", "r");\r
	337	if (pcf) {\r
	338	fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],\r
	339	&touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);\r
	340	fclose(pcf);\r
	341	}\r
	342	printf("found touchscreen/wm97xx\n");\r
	343	}\r
	344	\r
88bfc63d	345	/* disable Linux read-ahead */\r
	346	proc_set("/proc/sys/vm/max-readahead", "0\n");\r
	347	proc_set("/proc/sys/vm/min-readahead", "0\n");\r
	348	\r
720ee7f6	349	printf("exitting init()\n"); fflush(stdout);\r
	350	}\r
	351	\r
	352	char ext_menu = 0, ext_state = 0;\r
	353	\r
	354	void gp2x_deinit(void)\r
	355	{\r
8dfb9fd5	356	Reset940(1, 3);\r
720ee7f6	357	Pause940(1);\r
	358	\r
	359	gp2x_video_changemode(15);\r
4dfd9f42	360	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
	361	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
	362	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
	363	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
	364	\r
0805b5b4	365	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
720ee7f6	366	munmap((void *)gp2x_memregs, 0x10000);\r
720ee7f6	367	close(memdev);\r
3f2aaff2	368	if (touchdev >= 0) close(touchdev);\r
720ee7f6	369	\r
b3972d82	370	sndout_oss_exit();\r
720ee7f6	371	\r
	372	printf("all done, running ");\r
	373	\r
	374	// Zaq121's alternative frontend support from MAME\r
b3972d82	375	if (ext_menu && ext_state) {\r
720ee7f6	376	printf("%s -state %s\n", ext_menu, ext_state);\r
	377	execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	378	} else if(ext_menu) {\r
	379	printf("%s\n", ext_menu);\r
	380	execl(ext_menu, ext_menu, NULL);\r
	381	} else {\r
	382	printf("gp2xmenu\n");\r
	383	chdir("/usr/gp2x");\r
	384	execl("gp2xmenu", "gp2xmenu", NULL);\r
	385	}\r
	386	}\r
	387	\r
6245d5a0	388	/* lprintf */\r
	389	void lprintf(const char *fmt, ...)\r
	390	{\r
	391	va_list vl;\r
	392	\r
	393	va_start(vl, fmt);\r
	394	vprintf(fmt, vl);\r
	395	va_end(vl);\r
	396	}\r
720ee7f6	397	\r