[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 <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
\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[] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
static unsigned short gp2x_screenaddr_old[4];\r
\r
\r
/* video stuff */\r
void gp2x_video_flip(void)\r
{\r
	unsigned short msw = (unsigned short)(gp2x_screenaddrs[screensel&3] >> 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&3];\r
}\r
\r
/* doulblebuffered flip */\r
void gp2x_video_flip2(void)\r
{\r
	unsigned short msw = (unsigned short)(gp2x_screenaddrs[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 W, int H)\r
{\r
	float escalaw, escalah;\r
	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\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
	gp2x_memregs[0x2906>>1]=(unsigned short)((float)escalaw *(W/320.0));\r
	// scale vertical\r
	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));\r
}\r
\r
\r
/* LCD updates @ 80Hz? */\r
void gp2x_video_wait_vsync(void)\r
{\r
	gp2x_memregs[0x2846>>1] = 0x20|2; //(gp2x_memregs[0x2846>>1] | 0x20) & ~2;\r
	while(!(gp2x_memregs[0x2846>>1] & 2));// usleep(1);\r
}\r
\r
\r
void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
{\r
	if (buffers & (1<<0)) memcpy((char *)gp2x_screens[0] + offset, data, len);\r
	if (buffers & (1<<1)) memcpy((char *)gp2x_screens[1] + offset, data, len);\r
	if (buffers & (1<<2)) memcpy((char *)gp2x_screens[2] + offset, data, len);\r
	if (buffers & (1<<3)) memcpy((char *)gp2x_screens[3] + offset, 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);\r
	memset(gp2x_screen, 0xe0, 320*8);\r
	memset(gp2x_screen + 320*232, 0xe0, 320*8);\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);\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));\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_SPEED,  &rate);\r
	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\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
	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
	usleep(100000);\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
\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_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
	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
	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
\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
	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
	37	\r
	38	volatile unsigned short *gp2x_memregs;\r
	39	//static\r
	40	volatile unsigned long *gp2x_memregl;\r
	41	static void *gp2x_screens[4];\r
	42	static int screensel = 0;\r
	43	//static\r
	44	int memdev = 0;\r
	45	static int sounddev = 0, mixerdev = 0;\r
	46	\r
	47	void *gp2x_screen;\r
	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
720ee7f6	55	static const int gp2x_screenaddrs[] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
4dfd9f42	56	static unsigned short gp2x_screenaddr_old[4];\r
720ee7f6	57	\r
	58	\r
	59	/* video stuff */\r
	60	void gp2x_video_flip(void)\r
	61	{\r
0805b5b4	62	unsigned short msw = (unsigned short)(gp2x_screenaddrs[screensel&3] >> 16);\r
720ee7f6	63	\r
0805b5b4	64	gp2x_memregs[0x2910>>1] = msw;\r
	65	gp2x_memregs[0x2914>>1] = msw;\r
	66	gp2x_memregs[0x290E>>1] = 0;\r
	67	gp2x_memregs[0x2912>>1] = 0;\r
720ee7f6	68	\r
	69	// jump to other buffer:\r
	70	gp2x_screen = gp2x_screens[++screensel&3];\r
	71	}\r
	72	\r
e5d315a5	73	/* doulblebuffered flip */\r
	74	void gp2x_video_flip2(void)\r
	75	{\r
0805b5b4	76	unsigned short msw = (unsigned short)(gp2x_screenaddrs[screensel&1] >> 16);\r
720ee7f6	77	\r
0805b5b4	78	gp2x_memregs[0x2910>>1] = msw;\r
	79	gp2x_memregs[0x2914>>1] = msw;\r
	80	gp2x_memregs[0x290E>>1] = 0;\r
	81	gp2x_memregs[0x2912>>1] = 0;\r
e5d315a5	82	\r
	83	// jump to other buffer:\r
	84	gp2x_screen = gp2x_screens[++screensel&1];\r
	85	}\r
	86	\r
	87	\r
	88	void gp2x_video_changemode2(int bpp)\r
720ee7f6	89	{\r
	90	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../\r
	91	gp2x_memregs[0x290C>>1]=320((bpp+1)/8); /line width in bytes*/\r
e5d315a5	92	}\r
	93	\r
	94	\r
	95	void gp2x_video_changemode(int bpp)\r
	96	{\r
	97	gp2x_video_changemode2(bpp);\r
720ee7f6	98	\r
0805b5b4	99	gp2x_memset_all_buffers(0, 0, 3202402);\r
720ee7f6	100	gp2x_video_flip();\r
	101	}\r
	102	\r
	103	\r
	104	void gp2x_video_setpalette(int *pal, int len)\r
	105	{\r
	106	unsigned short g=(unsigned short )pal;\r
	107	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
	108	gp2x_memregs[0x2958>>1] = 0;\r
	109	\r
	110	len *= 2;\r
	111	while(len--) memreg=g++;\r
	112	}\r
	113	\r
	114	\r
	115	// TV Compatible function //\r
	116	void gp2x_video_RGB_setscaling(int W, int H)\r
	117	{\r
	118	float escalaw, escalah;\r
	119	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
	120	\r
	121	escalaw = 1024.0; // RGB Horiz LCD\r
	122	escalah = 320.0; // RGB Vert LCD\r
	123	\r
	124	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
	125	{\r
	126	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
	127	if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
	128	escalah=274.0; // RGB Vert TV PAL\r
	129	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
	130	escalah=331.0; // RGB Vert TV NTSC\r
	131	}\r
	132	\r
	133	// scale horizontal\r
	134	gp2x_memregs[0x2906>>1]=(unsigned short)((float)escalaw *(W/320.0));\r
	135	// scale vertical\r
	136	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));\r
	137	}\r
	138	\r
	139	\r
	140	/* LCD updates @ 80Hz? */\r
	141	void gp2x_video_wait_vsync(void)\r
	142	{\r
	143	gp2x_memregs[0x2846>>1] = 0x20\|2; //(gp2x_memregs[0x2846>>1] \| 0x20) & ~2;\r
	144	while(!(gp2x_memregs[0x2846>>1] & 2));// usleep(1);\r
	145	}\r
	146	\r
	147	\r
4ffd2858	148	void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)\r
	149	{\r
	150	if (buffers & (1<<0)) memcpy((char *)gp2x_screens[0] + offset, data, len);\r
	151	if (buffers & (1<<1)) memcpy((char *)gp2x_screens[1] + offset, data, len);\r
	152	if (buffers & (1<<2)) memcpy((char *)gp2x_screens[2] + offset, data, len);\r
	153	if (buffers & (1<<3)) memcpy((char *)gp2x_screens[3] + offset, data, len);\r
	154	}\r
	155	\r
	156	\r
720ee7f6	157	void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
720ee7f6	158	{\r
4ffd2858	159	gp2x_memcpy_buffers(0xf, data, offset, len);\r
720ee7f6	160	}\r
	161	\r
	162	\r
	163	void gp2x_memset_all_buffers(int offset, int byte, int len)\r
	164	{\r
	165	memset((char *)gp2x_screens[0] + offset, byte, len);\r
	166	memset((char *)gp2x_screens[1] + offset, byte, len);\r
	167	memset((char *)gp2x_screens[2] + offset, byte, len);\r
	168	memset((char *)gp2x_screens[3] + offset, byte, len);\r
	169	}\r
	170	\r
	171	\r
e5d315a5	172	void gp2x_pd_clone_buffer2(void)\r
	173	{\r
	174	memcpy(gp2x_screen, gp2x_screens[2], 320*240);\r
	175	memset(gp2x_screen, 0xe0, 320*8);\r
	176	memset(gp2x_screen + 320232, 0xe0, 3208);\r
	177	}\r
	178	\r
	179	\r
720ee7f6	180	unsigned long gp2x_joystick_read(int allow_usb_joy)\r
	181	{\r
	182	int i;\r
	183	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF);\r
	184	if(value==0xFD) value=0xFA;\r
	185	if(value==0xF7) value=0xEB;\r
	186	if(value==0xDF) value=0xAF;\r
	187	if(value==0x7F) value=0xBE;\r
	188	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) \| value \| (gp2x_memregs[0x1186>>1] << 16));\r
	189	\r
	190	if (allow_usb_joy && num_of_joys > 0) {\r
	191	// check the usb joy as well..\r
	192	gp2x_usbjoy_update();\r
	193	for (i = 0; i < num_of_joys; i++)\r
	194	value \|= gp2x_usbjoy_check(i);\r
	195	}\r
	196	\r
	197	return value;\r
	198	}\r
	199	\r
	200	static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
	201	\r
	202	void gp2x_start_sound(int rate, int bits, int stereo)\r
	203	{\r
	204	int frag = 0, bsize, buffers;\r
	205	\r
	206	// if no settings change, we don't need to do anything\r
	207	if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
	208	\r
	209	if (sounddev > 0) close(sounddev);\r
	210	sounddev = open("/dev/dsp", O_WRONLY\|O_ASYNC);\r
	211	if (sounddev == -1)\r
	212	printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
	213	\r
	214	ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);\r
	215	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
	216	ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
	217	// calculate buffer size\r
	218	buffers = 16;\r
	219	bsize = rate / 32;\r
	220	if (rate > 22050) { bsize=4; buffers=2; } // 44k mode seems to be very demanding\r
	221	while ((bsize>>=1)) frag++;\r
	222	frag \|= buffers<<16; // 16 buffers\r
	223	ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
	224	printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
	225	rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
	226	\r
	227	s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
	228	usleep(100000);\r
	229	}\r
	230	\r
	231	\r
	232	void gp2x_sound_write(void *buff, int len)\r
	233	{\r
	234	write(sounddev, buff, len);\r
	235	}\r
	236	\r
b30a8e67	237	void gp2x_sound_sync(void)\r
	238	{\r
	239	ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
	240	}\r
720ee7f6	241	\r
	242	void gp2x_sound_volume(int l, int r)\r
	243	{\r
	244	l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
	245	l<<=8; l\|=r;\r
	246	ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /SOUND_MIXER_WRITE_VOLUME/\r
	247	}\r
	248	\r
	249	\r
	250	/* 940 */\r
	251	void Pause940(int yes)\r
	252	{\r
	253	if(yes)\r
	254	gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	255	else\r
	256	gp2x_memregs[0x0904>>1] \|= 1;\r
	257	}\r
	258	\r
	259	\r
8dfb9fd5	260	void Reset940(int yes, int bank)\r
720ee7f6	261	{\r
0805b5b4	262	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03);\r
720ee7f6	263	}\r
	264	\r
	265	\r
	266	\r
	267	/* common */\r
	268	void gp2x_init(void)\r
	269	{\r
	270	printf("entering init()\n"); fflush(stdout);\r
	271	\r
	272	memdev = open("/dev/mem", O_RDWR);\r
	273	if (memdev == -1)\r
	274	{\r
	275	printf("open(\"/dev/mem\") failed with %i\n", errno);\r
	276	exit(1);\r
	277	}\r
	278	\r
	279	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	280	printf("memregs are @ %p\n", gp2x_memregs);\r
	281	if(gp2x_memregs == MAP_FAILED)\r
	282	{\r
	283	printf("mmap(memregs) failed with %i\n", errno);\r
	284	exit(1);\r
	285	}\r
	286	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
	287	\r
0805b5b4	288	gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);\r
0805b5b4	289	if(gp2x_screens[0] == MAP_FAILED)\r
720ee7f6	290	{\r
	291	printf("mmap(gp2x_screen) failed with %i\n", errno);\r
	292	exit(1);\r
	293	}\r
0805b5b4	294	printf("framebuffers point to %p\n", gp2x_screens[0]);\r
	295	gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;\r
	296	gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;\r
	297	gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;\r
720ee7f6	298	\r
	299	gp2x_screen = gp2x_screens[0];\r
	300	screensel = 0;\r
	301	\r
4dfd9f42	302	gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];\r
	303	gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];\r
	304	gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];\r
	305	gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];\r
	306	\r
0805b5b4	307	gp2x_memset_all_buffers(0, 0, 3202402);\r
0805b5b4	308	\r
720ee7f6	309	// snd\r
	310	mixerdev = open("/dev/mixer", O_RDWR);\r
	311	if (mixerdev == -1)\r
	312	printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
	313	\r
	314	/* init usb joys -GnoStiC */\r
	315	gp2x_usbjoy_init();\r
	316	\r
	317	printf("exitting init()\n"); fflush(stdout);\r
	318	}\r
	319	\r
	320	char ext_menu = 0, ext_state = 0;\r
	321	\r
	322	void gp2x_deinit(void)\r
	323	{\r
8dfb9fd5	324	Reset940(1, 3);\r
720ee7f6	325	Pause940(1);\r
	326	\r
	327	gp2x_video_changemode(15);\r
4dfd9f42	328	gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];\r
	329	gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];\r
	330	gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];\r
	331	gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];\r
	332	\r
0805b5b4	333	munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);\r
720ee7f6	334	munmap((void *)gp2x_memregs, 0x10000);\r
	335	close(memdev);\r
	336	close(mixerdev);\r
	337	if (sounddev > 0) close(sounddev);\r
	338	\r
	339	gp2x_usbjoy_deinit();\r
	340	\r
	341	printf("all done, running ");\r
	342	\r
	343	// Zaq121's alternative frontend support from MAME\r
	344	if(ext_menu && ext_state) {\r
	345	printf("%s -state %s\n", ext_menu, ext_state);\r
	346	execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	347	} else if(ext_menu) {\r
	348	printf("%s\n", ext_menu);\r
	349	execl(ext_menu, ext_menu, NULL);\r
	350	} else {\r
	351	printf("gp2xmenu\n");\r
	352	chdir("/usr/gp2x");\r
	353	execl("gp2xmenu", "gp2xmenu", NULL);\r
	354	}\r
	355	}\r
	356	\r
	357	\r