[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_ADDR0 0x4000000-640*480\r
#define FRAMEBUFF_ADDR1 0x4000000-640*480*2\r
#define FRAMEBUFF_ADDR2 0x4000000-640*480*3\r
#define FRAMEBUFF_ADDR3 0x4000000-640*480*4\r
\r
static const int gp2x_screenaddrs[] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
\r
\r
/* video stuff */\r
void gp2x_video_flip(void)\r
{\r
	unsigned int address = gp2x_screenaddrs[screensel&3];\r
\r
	/* test */\r
/*	{\r
		int i; char *p=gp2x_screen;\r
		for (i=0; i < 240; i++) { memset(p+i*320, 0, 32); }\r
	}*/\r
\r
	gp2x_memregs[0x290E>>1]=(unsigned short)(address);\r
  	gp2x_memregs[0x2910>>1]=(unsigned short)(address >> 16);\r
  	gp2x_memregs[0x2912>>1]=(unsigned short)(address);\r
  	gp2x_memregs[0x2914>>1]=(unsigned short)(address >> 16);\r
\r
	// jump to other buffer:\r
	gp2x_screen = gp2x_screens[++screensel&3];\r
}\r
\r
\r
void gp2x_video_changemode(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
  	gp2x_memset_all_buffers(0, 0, 640*480);\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_all_buffers(void *data, int offset, int len)\r
{\r
	memcpy((char *)gp2x_screens[0] + offset, data, len);\r
	memcpy((char *)gp2x_screens[1] + offset, data, len);\r
	memcpy((char *)gp2x_screens[2] + offset, data, len);\r
	memcpy((char *)gp2x_screens[3] + offset, data, 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
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); /* bank=3 */\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[3] = mmap(0, 640*480*4, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR3);\r
	if(gp2x_screens[3] == 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[3]);\r
	gp2x_screens[2] = (char *) gp2x_screens[3]+640*480;\r
	gp2x_screens[1] = (char *) gp2x_screens[2]+640*480;\r
	gp2x_screens[0] = (char *) gp2x_screens[1]+640*480;\r
\r
	gp2x_screen = gp2x_screens[0];\r
	screensel = 0;\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
	munmap(gp2x_screens[0], 640*480*4);\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
	49	#define FRAMEBUFF_ADDR0 0x4000000-640*480\r
	50	#define FRAMEBUFF_ADDR1 0x4000000-6404802\r
	51	#define FRAMEBUFF_ADDR2 0x4000000-6404803\r
	52	#define FRAMEBUFF_ADDR3 0x4000000-6404804\r
	53	\r
	54	static const int gp2x_screenaddrs[] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };\r
	55	\r
	56	\r
	57	/* video stuff */\r
	58	void gp2x_video_flip(void)\r
	59	{\r
	60	unsigned int address = gp2x_screenaddrs[screensel&3];\r
	61	\r
	62	/* test */\r
	63	/* {\r
	64	int i; char *p=gp2x_screen;\r
65	for (i=0; i < 240; i++) { memset(p+i*320, 0, 32); }\r
66	}*/\r
67	\r
68	gp2x_memregs[0x290E>>1]=(unsigned short)(address);\r
69	gp2x_memregs[0x2910>>1]=(unsigned short)(address >> 16);\r
70	gp2x_memregs[0x2912>>1]=(unsigned short)(address);\r
71	gp2x_memregs[0x2914>>1]=(unsigned short)(address >> 16);\r
72	\r
73	// jump to other buffer:\r
74	gp2x_screen = gp2x_screens[++screensel&3];\r
75	}\r
76	\r
77	\r
78	void gp2x_video_changemode(int bpp)\r
79	{\r
80	gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)\|0xAB; /8/15/16/24bpp.../\r
81	gp2x_memregs[0x290C>>1]=320((bpp+1)/8); /line width in bytes*/\r
82	\r
83	gp2x_memset_all_buffers(0, 0, 640*480);\r
84	gp2x_video_flip();\r
85	}\r
86	\r
87	\r
88	void gp2x_video_setpalette(int *pal, int len)\r
89	{\r
90	unsigned short g=(unsigned short )pal;\r
91	volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];\r
92	gp2x_memregs[0x2958>>1] = 0;\r
93	\r
94	len *= 2;\r
95	while(len--) memreg=g++;\r
96	}\r
97	\r
98	\r
99	// TV Compatible function //\r
100	void gp2x_video_RGB_setscaling(int W, int H)\r
101	{\r
102	float escalaw, escalah;\r
103	int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;\r
104	\r
105	escalaw = 1024.0; // RGB Horiz LCD\r
106	escalah = 320.0; // RGB Vert LCD\r
107	\r
108	if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out\r
109	{\r
110	escalaw=489.0; // RGB Horiz TV (PAL, NTSC)\r
111	if (gp2x_memregs[0x2818>>1] == 287) //PAL\r
112	escalah=274.0; // RGB Vert TV PAL\r
113	else if (gp2x_memregs[0x2818>>1] == 239) //NTSC\r
114	escalah=331.0; // RGB Vert TV NTSC\r
115	}\r
116	\r
117	// scale horizontal\r
118	gp2x_memregs[0x2906>>1]=(unsigned short)((float)escalaw *(W/320.0));\r
119	// scale vertical\r
120	gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah bpp (H/240.0));\r
121	}\r
122	\r
123	\r
124	/* LCD updates @ 80Hz? */\r
125	void gp2x_video_wait_vsync(void)\r
126	{\r
127	gp2x_memregs[0x2846>>1] = 0x20\|2; //(gp2x_memregs[0x2846>>1] \| 0x20) & ~2;\r
128	while(!(gp2x_memregs[0x2846>>1] & 2));// usleep(1);\r
129	}\r
130	\r
131	\r
132	void gp2x_memcpy_all_buffers(void *data, int offset, int len)\r
133	{\r
134	memcpy((char *)gp2x_screens[0] + offset, data, len);\r
135	memcpy((char *)gp2x_screens[1] + offset, data, len);\r
136	memcpy((char *)gp2x_screens[2] + offset, data, len);\r
137	memcpy((char *)gp2x_screens[3] + offset, data, len);\r
138	}\r
139	\r
140	\r
141	void gp2x_memset_all_buffers(int offset, int byte, int len)\r
142	{\r
143	memset((char *)gp2x_screens[0] + offset, byte, len);\r
144	memset((char *)gp2x_screens[1] + offset, byte, len);\r
145	memset((char *)gp2x_screens[2] + offset, byte, len);\r
146	memset((char *)gp2x_screens[3] + offset, byte, len);\r
147	}\r
148	\r
149	\r
150	unsigned long gp2x_joystick_read(int allow_usb_joy)\r
151	{\r
152	int i;\r
153	unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF);\r
154	if(value==0xFD) value=0xFA;\r
155	if(value==0xF7) value=0xEB;\r
156	if(value==0xDF) value=0xAF;\r
157	if(value==0x7F) value=0xBE;\r
158	value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) \| value \| (gp2x_memregs[0x1186>>1] << 16));\r
159	\r
160	if (allow_usb_joy && num_of_joys > 0) {\r
161	// check the usb joy as well..\r
162	gp2x_usbjoy_update();\r
163	for (i = 0; i < num_of_joys; i++)\r
164	value \|= gp2x_usbjoy_check(i);\r
165	}\r
166	\r
167	return value;\r
168	}\r
169	\r
170	static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;\r
171	\r
172	void gp2x_start_sound(int rate, int bits, int stereo)\r
173	{\r
174	int frag = 0, bsize, buffers;\r
175	\r
176	// if no settings change, we don't need to do anything\r
177	if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;\r
178	\r
179	if (sounddev > 0) close(sounddev);\r
180	sounddev = open("/dev/dsp", O_WRONLY\|O_ASYNC);\r
181	if (sounddev == -1)\r
182	printf("open(\"/dev/dsp\") failed with %i\n", errno);\r
183	\r
184	ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);\r
185	ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);\r
186	ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);\r
187	// calculate buffer size\r
188	buffers = 16;\r
189	bsize = rate / 32;\r
190	if (rate > 22050) { bsize=4; buffers=2; } // 44k mode seems to be very demanding\r
191	while ((bsize>>=1)) frag++;\r
192	frag \|= buffers<<16; // 16 buffers\r
193	ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);\r
194	printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",\r
195	rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));\r
196	\r
197	s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;\r
198	usleep(100000);\r
199	}\r
200	\r
201	\r
202	void gp2x_sound_write(void *buff, int len)\r
203	{\r
204	write(sounddev, buff, len);\r
205	}\r
206	\r
b30a8e67	207	void gp2x_sound_sync(void)\r
	208	{\r
	209	ioctl(sounddev, SOUND_PCM_SYNC, 0);\r
	210	}\r
720ee7f6	211	\r
	212	void gp2x_sound_volume(int l, int r)\r
	213	{\r
	214	l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;\r
	215	l<<=8; l\|=r;\r
	216	ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /SOUND_MIXER_WRITE_VOLUME/\r
	217	}\r
	218	\r
	219	\r
	220	/* 940 */\r
	221	void Pause940(int yes)\r
	222	{\r
	223	if(yes)\r
	224	gp2x_memregs[0x0904>>1] &= 0xFFFE;\r
	225	else\r
	226	gp2x_memregs[0x0904>>1] \|= 1;\r
	227	}\r
	228	\r
	229	\r
8dfb9fd5	230	void Reset940(int yes, int bank)\r
720ee7f6	231	{\r
8dfb9fd5	232	gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) \| (bank & 0x03); /* bank=3 */\r
720ee7f6	233	}\r
	234	\r
	235	\r
	236	\r
	237	/* common */\r
	238	void gp2x_init(void)\r
	239	{\r
	240	printf("entering init()\n"); fflush(stdout);\r
	241	\r
	242	memdev = open("/dev/mem", O_RDWR);\r
	243	if (memdev == -1)\r
	244	{\r
	245	printf("open(\"/dev/mem\") failed with %i\n", errno);\r
	246	exit(1);\r
	247	}\r
	248	\r
	249	gp2x_memregs = mmap(0, 0x10000, PROT_READ\|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);\r
	250	printf("memregs are @ %p\n", gp2x_memregs);\r
	251	if(gp2x_memregs == MAP_FAILED)\r
	252	{\r
	253	printf("mmap(memregs) failed with %i\n", errno);\r
	254	exit(1);\r
	255	}\r
	256	gp2x_memregl = (unsigned long *) gp2x_memregs;\r
	257	\r
	258	gp2x_screens[3] = mmap(0, 6404804, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR3);\r
	259	if(gp2x_screens[3] == MAP_FAILED)\r
	260	{\r
	261	printf("mmap(gp2x_screen) failed with %i\n", errno);\r
	262	exit(1);\r
	263	}\r
	264	printf("framebuffers point to %p\n", gp2x_screens[3]);\r
	265	gp2x_screens[2] = (char ) gp2x_screens[3]+640480;\r
	266	gp2x_screens[1] = (char ) gp2x_screens[2]+640480;\r
	267	gp2x_screens[0] = (char ) gp2x_screens[1]+640480;\r
	268	\r
	269	gp2x_screen = gp2x_screens[0];\r
	270	screensel = 0;\r
	271	\r
	272	// snd\r
	273	mixerdev = open("/dev/mixer", O_RDWR);\r
	274	if (mixerdev == -1)\r
	275	printf("open(\"/dev/mixer\") failed with %i\n", errno);\r
	276	\r
	277	/* init usb joys -GnoStiC */\r
	278	gp2x_usbjoy_init();\r
	279	\r
	280	printf("exitting init()\n"); fflush(stdout);\r
	281	}\r
	282	\r
	283	char ext_menu = 0, ext_state = 0;\r
	284	\r
	285	void gp2x_deinit(void)\r
	286	{\r
8dfb9fd5	287	Reset940(1, 3);\r
720ee7f6	288	Pause940(1);\r
	289	\r
	290	gp2x_video_changemode(15);\r
	291	munmap(gp2x_screens[0], 6404804);\r
	292	munmap((void *)gp2x_memregs, 0x10000);\r
	293	close(memdev);\r
	294	close(mixerdev);\r
	295	if (sounddev > 0) close(sounddev);\r
	296	\r
	297	gp2x_usbjoy_deinit();\r
	298	\r
	299	printf("all done, running ");\r
	300	\r
	301	// Zaq121's alternative frontend support from MAME\r
	302	if(ext_menu && ext_state) {\r
	303	printf("%s -state %s\n", ext_menu, ext_state);\r
	304	execl(ext_menu, ext_menu, "-state", ext_state, NULL);\r
	305	} else if(ext_menu) {\r
	306	printf("%s\n", ext_menu);\r
	307	execl(ext_menu, ext_menu, NULL);\r
	308	} else {\r
	309	printf("gp2xmenu\n");\r
	310	chdir("/usr/gp2x");\r
	311	execl("gp2xmenu", "gp2xmenu", NULL);\r
	312	}\r
	313	}\r
	314	\r
	315	\r