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+/**
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+ * All this is mostly based on rlyeh's minimal library.
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+ * Copied here to review all his code and understand what's going on.
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+**/
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+
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+/*
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+
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+ GP2X minimal library v0.A by rlyeh, (c) 2005. emulnation.info@rlyeh (swap it!)
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+
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+ Thanks to Squidge, Robster, snaff, Reesy and NK, for the help & previous work! :-)
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+
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+ License
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+ =======
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+
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+ Free for non-commercial projects (it would be nice receiving a mail from you).
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+ Other cases, ask me first.
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+
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+ GamePark Holdings is not allowed to use this library and/or use parts from it.
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+
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+*/
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+
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+
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+#include <stdio.h>
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+#include <stdlib.h>
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+#include <stdarg.h>
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+#include <string.h>
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+#include <unistd.h>
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+#include <sys/mman.h>
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+#include <sys/types.h>
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+#include <sys/stat.h>
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+#include <sys/ioctl.h>
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+#include <sys/soundcard.h>
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+#include <fcntl.h>
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+#include <errno.h>
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+
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+#include "../gp2x/gp2x.h"
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+#include "../gp2x/usbjoy.h"
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+#include "../common/arm_utils.h"
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+
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+volatile unsigned short *gp2x_memregs;
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+//static
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+volatile unsigned long *gp2x_memregl;
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+static void *gp2x_screens[4];
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+static int screensel = 0;
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+//static
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+int memdev = 0;
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+static int sounddev = -1, mixerdev = -1, touchdev = -1;
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+static int touchcal[7] = { 6203, 0, -1501397, 0, -4200, 16132680, 65536 };
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+
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+void *gp2x_screen;
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+
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+#define FRAMEBUFF_WHOLESIZE (0x30000*4) // 320*240*2 + some more
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+#define FRAMEBUFF_ADDR0 (0x4000000-FRAMEBUFF_WHOLESIZE)
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+#define FRAMEBUFF_ADDR1 (FRAMEBUFF_ADDR0+0x30000)
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+#define FRAMEBUFF_ADDR2 (FRAMEBUFF_ADDR1+0x30000)
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+#define FRAMEBUFF_ADDR3 (FRAMEBUFF_ADDR2+0x30000)
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+
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+static const int gp2x_screenaddrs[4] = { FRAMEBUFF_ADDR0, FRAMEBUFF_ADDR1, FRAMEBUFF_ADDR2, FRAMEBUFF_ADDR3 };
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+static int gp2x_screenaddrs_use[4];
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+static unsigned short gp2x_screenaddr_old[4];
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+
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+
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+/* video stuff */
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+void gp2x_video_flip(void)
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+{
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+ unsigned short lsw = (unsigned short) gp2x_screenaddrs_use[screensel&3];
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+ unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&3] >> 16);
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+
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+ gp2x_memregs[0x2910>>1] = msw;
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+ gp2x_memregs[0x2914>>1] = msw;
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+ gp2x_memregs[0x290E>>1] = lsw;
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+ gp2x_memregs[0x2912>>1] = lsw;
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+
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+ // jump to other buffer:
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+ gp2x_screen = gp2x_screens[++screensel&3];
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+}
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+
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+/* doulblebuffered flip */
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+void gp2x_video_flip2(void)
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+{
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+ unsigned short msw = (unsigned short)(gp2x_screenaddrs_use[screensel&1] >> 16);
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+
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+ gp2x_memregs[0x2910>>1] = msw;
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+ gp2x_memregs[0x2914>>1] = msw;
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+ gp2x_memregs[0x290E>>1] = 0;
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+ gp2x_memregs[0x2912>>1] = 0;
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+
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+ // jump to other buffer:
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+ gp2x_screen = gp2x_screens[++screensel&1];
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+}
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+
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+
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+void gp2x_video_changemode2(int bpp)
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+{
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+ gp2x_memregs[0x28DA>>1]=(((bpp+1)/8)<<9)|0xAB; /*8/15/16/24bpp...*/
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+ gp2x_memregs[0x290C>>1]=320*((bpp+1)/8); /*line width in bytes*/
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+}
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+
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+
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+void gp2x_video_changemode(int bpp)
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+{
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+ gp2x_video_changemode2(bpp);
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+
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+ gp2x_memset_all_buffers(0, 0, 320*240*2);
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+ gp2x_video_flip();
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+}
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+
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+
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+void gp2x_video_setpalette(int *pal, int len)
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+{
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+ unsigned short *g=(unsigned short *)pal;
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+ volatile unsigned short *memreg = &gp2x_memregs[0x295A>>1];
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+ gp2x_memregs[0x2958>>1] = 0;
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+
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+ len *= 2;
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+ while(len--) *memreg=*g++;
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+}
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+
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+
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+// TV Compatible function //
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+void gp2x_video_RGB_setscaling(int ln_offs, int W, int H)
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+{
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+ float escalaw, escalah;
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+ int bpp = (gp2x_memregs[0x28DA>>1]>>9)&0x3;
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+ unsigned short scalw;
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+
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+ // set offset
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+ gp2x_screenaddrs_use[0] = gp2x_screenaddrs[0] + ln_offs * 320 * bpp;
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+ gp2x_screenaddrs_use[1] = gp2x_screenaddrs[1] + ln_offs * 320 * bpp;
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+ gp2x_screenaddrs_use[2] = gp2x_screenaddrs[2] + ln_offs * 320 * bpp;
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+ gp2x_screenaddrs_use[3] = gp2x_screenaddrs[3] + ln_offs * 320 * bpp;
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+
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+ escalaw = 1024.0; // RGB Horiz LCD
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+ escalah = 320.0; // RGB Vert LCD
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+
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+ if(gp2x_memregs[0x2800>>1]&0x100) //TV-Out
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+ {
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+ escalaw=489.0; // RGB Horiz TV (PAL, NTSC)
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+ if (gp2x_memregs[0x2818>>1] == 287) //PAL
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+ escalah=274.0; // RGB Vert TV PAL
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+ else if (gp2x_memregs[0x2818>>1] == 239) //NTSC
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+ escalah=331.0; // RGB Vert TV NTSC
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+ }
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+
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+ // scale horizontal
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+ scalw = (unsigned short)((float)escalaw *(W/320.0));
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+ /* if there is no horizontal scaling, vertical doesn't work. Here is a nasty wrokaround... */
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+ if (H != 240 && W == 320) scalw--;
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+ gp2x_memregs[0x2906>>1]=scalw;
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+ // scale vertical
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+ gp2x_memregl[0x2908>>2]=(unsigned long)((float)escalah *bpp *(H/240.0));
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+}
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+
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+
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+void gp2x_video_wait_vsync(void)
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+{
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+ unsigned short v = gp2x_memregs[0x1182>>1];
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+ while (!((v ^ gp2x_memregs[0x1182>>1]) & 0x10)) spend_cycles(1024);
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+}
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+
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+
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+void gp2x_video_flush_cache(void)
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+{
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+ // since we are using the mmu hack, we must flush the cache first
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+ // (the params are most likely wrong, but they seem to work somehow)
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+ //flushcache(addr, addr + 320*240*2, 0);
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+ flushcache(gp2x_screen, (char *)gp2x_screen + 320*240*2, 0);
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+}
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+
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+
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+void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)
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+{
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+ char *dst;
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+ if (buffers & (1<<0)) { dst = (char *)gp2x_screens[0] + offset; if (dst != data) memcpy(dst, data, len); }
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+ if (buffers & (1<<1)) { dst = (char *)gp2x_screens[1] + offset; if (dst != data) memcpy(dst, data, len); }
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+ if (buffers & (1<<2)) { dst = (char *)gp2x_screens[2] + offset; if (dst != data) memcpy(dst, data, len); }
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+ if (buffers & (1<<3)) { dst = (char *)gp2x_screens[3] + offset; if (dst != data) memcpy(dst, data, len); }
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+}
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+
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+
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+void gp2x_memcpy_all_buffers(void *data, int offset, int len)
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+{
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+ gp2x_memcpy_buffers(0xf, data, offset, len);
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+}
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+
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+
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+void gp2x_memset_all_buffers(int offset, int byte, int len)
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+{
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+ memset((char *)gp2x_screens[0] + offset, byte, len);
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+ memset((char *)gp2x_screens[1] + offset, byte, len);
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+ memset((char *)gp2x_screens[2] + offset, byte, len);
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+ memset((char *)gp2x_screens[3] + offset, byte, len);
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+}
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+
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+
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+void gp2x_pd_clone_buffer2(void)
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+{
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+ memcpy(gp2x_screen, gp2x_screens[2], 320*240*2);
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+}
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+
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+
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+unsigned long gp2x_joystick_read(int allow_usb_joy)
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+{
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+ int i;
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+ unsigned long value=(gp2x_memregs[0x1198>>1] & 0x00FF); // GPIO M
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+ if(value==0xFD) value=0xFA;
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+ if(value==0xF7) value=0xEB;
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+ if(value==0xDF) value=0xAF;
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+ if(value==0x7F) value=0xBE;
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+ value = ~((gp2x_memregs[0x1184>>1] & 0xFF00) | value | (gp2x_memregs[0x1186>>1] << 16)); // C D
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+
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+ if (allow_usb_joy && num_of_joys > 0) {
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+ // check the usb joy as well..
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+ gp2x_usbjoy_update();
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+ for (i = 0; i < num_of_joys; i++)
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+ value |= gp2x_usbjoy_check(i);
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+ }
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+
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+ return value;
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+}
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+
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+typedef struct ucb1x00_ts_event
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+{
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+ unsigned short pressure;
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+ unsigned short x;
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+ unsigned short y;
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+ unsigned short pad;
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+ struct timeval stamp;
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+} UCB1X00_TS_EVENT;
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+
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+int gp2x_touchpad_read(int *x, int *y)
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+{
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+ UCB1X00_TS_EVENT event;
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+ static int zero_seen = 0;
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+ int retval;
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+
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+ if (touchdev < 0) return -1;
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+
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+ retval = read(touchdev, &event, sizeof(event));
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+ if (retval <= 0) {
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+ printf("touch read failed %i %i\n", retval, errno);
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+ return -1;
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+ }
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+ // this is to ignore the messed-up 4.1.x driver
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+ if (event.pressure == 0) zero_seen = 1;
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+
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+ if (x) *x = (event.x * touchcal[0] + touchcal[2]) >> 16;
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+ if (y) *y = (event.y * touchcal[4] + touchcal[5]) >> 16;
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+ // printf("read %i %i %i\n", event.pressure, *x, *y);
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+
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+ return zero_seen ? event.pressure : 0;
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+}
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+
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+
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+static int s_oldrate = 0, s_oldbits = 0, s_oldstereo = 0;
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+
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+void gp2x_start_sound(int rate, int bits, int stereo)
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+{
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+ int frag = 0, bsize, buffers;
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+
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+ // if no settings change, we don't need to do anything
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+ if (rate == s_oldrate && s_oldbits == bits && s_oldstereo == stereo) return;
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+
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+ if (sounddev > 0) close(sounddev);
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+ sounddev = open("/dev/dsp", O_WRONLY|O_ASYNC);
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+ if (sounddev == -1)
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+ printf("open(\"/dev/dsp\") failed with %i\n", errno);
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+
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+ ioctl(sounddev, SNDCTL_DSP_SETFMT, &bits);
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+ ioctl(sounddev, SNDCTL_DSP_SPEED, &rate);
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+ ioctl(sounddev, SNDCTL_DSP_STEREO, &stereo);
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+ // calculate buffer size
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+ buffers = 16;
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+ bsize = rate / 32;
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+ if (rate > 22050) { bsize*=4; buffers*=2; } // 44k mode seems to be very demanding
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+ while ((bsize>>=1)) frag++;
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+ frag |= buffers<<16; // 16 buffers
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+ ioctl(sounddev, SNDCTL_DSP_SETFRAGMENT, &frag);
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+ usleep(192*1024);
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+
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+ printf("gp2x_set_sound: %i/%ibit/%s, %i buffers of %i bytes\n",
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+ rate, bits, stereo?"stereo":"mono", frag>>16, 1<<(frag&0xffff));
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+
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+ s_oldrate = rate; s_oldbits = bits; s_oldstereo = stereo;
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+}
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+
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+
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+void gp2x_sound_write(void *buff, int len)
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+{
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+ write(sounddev, buff, len);
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+}
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+
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+void gp2x_sound_sync(void)
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+{
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+ ioctl(sounddev, SOUND_PCM_SYNC, 0);
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+}
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+
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+void gp2x_sound_volume(int l, int r)
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+{
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+ l=l<0?0:l; l=l>255?255:l; r=r<0?0:r; r=r>255?255:r;
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+ l<<=8; l|=r;
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+ ioctl(mixerdev, SOUND_MIXER_WRITE_PCM, &l); /*SOUND_MIXER_WRITE_VOLUME*/
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+}
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+
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+
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+/* 940 */
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+void Pause940(int yes)
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+{
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+ if(yes)
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+ gp2x_memregs[0x0904>>1] &= 0xFFFE;
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+ else
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+ gp2x_memregs[0x0904>>1] |= 1;
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+}
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+
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+
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+void Reset940(int yes, int bank)
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+{
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+ gp2x_memregs[0x3B48>>1] = ((yes&1) << 7) | (bank & 0x03);
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+}
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+
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+static void proc_set(const char *path, const char *val)
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+{
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+ FILE *f;
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+ char tmp[16];
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+
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+ f = fopen(path, "w");
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+ if (f == NULL) {
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+ printf("failed to open: %s\n", path);
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+ return;
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+ }
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+
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+ fprintf(f, "0\n");
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+ fclose(f);
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+
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+ printf("\"%s\" is set to: ", path);
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+ f = fopen(path, "r");
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+ if (f == NULL) {
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+ printf("(open failed)\n");
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+ return;
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+ }
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+
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+ fgets(tmp, sizeof(tmp), f);
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+ printf("%s", tmp);
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+ fclose(f);
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+}
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+
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+
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+/* common */
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+void gp2x_init(void)
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+{
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+ printf("entering init()\n"); fflush(stdout);
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+
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+ memdev = open("/dev/mem", O_RDWR);
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+ if (memdev == -1)
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+ {
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+ printf("open(\"/dev/mem\") failed with %i\n", errno);
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+ exit(1);
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+ }
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+
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+ gp2x_memregs = mmap(0, 0x10000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
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+ printf("memregs are @ %p\n", gp2x_memregs);
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+ if(gp2x_memregs == MAP_FAILED)
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+ {
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+ printf("mmap(memregs) failed with %i\n", errno);
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+ exit(1);
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+ }
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+ gp2x_memregl = (unsigned long *) gp2x_memregs;
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+
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+ gp2x_memregs[0x2880>>1] &= ~0x383; // disable cursor, subpict, osd, video layers
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+
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+ gp2x_screens[0] = mmap(0, FRAMEBUFF_WHOLESIZE, PROT_WRITE, MAP_SHARED, memdev, FRAMEBUFF_ADDR0);
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+ if(gp2x_screens[0] == MAP_FAILED)
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+ {
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+ printf("mmap(gp2x_screen) failed with %i\n", errno);
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+ exit(1);
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|
|
+ }
|
|
|
+ printf("framebuffers point to %p\n", gp2x_screens[0]);
|
|
|
+ gp2x_screens[1] = (char *) gp2x_screens[0]+0x30000;
|
|
|
+ gp2x_screens[2] = (char *) gp2x_screens[1]+0x30000;
|
|
|
+ gp2x_screens[3] = (char *) gp2x_screens[2]+0x30000;
|
|
|
+
|
|
|
+ gp2x_screen = gp2x_screens[0];
|
|
|
+ screensel = 0;
|
|
|
+
|
|
|
+ gp2x_screenaddr_old[0] = gp2x_memregs[0x290E>>1];
|
|
|
+ gp2x_screenaddr_old[1] = gp2x_memregs[0x2910>>1];
|
|
|
+ gp2x_screenaddr_old[2] = gp2x_memregs[0x2912>>1];
|
|
|
+ gp2x_screenaddr_old[3] = gp2x_memregs[0x2914>>1];
|
|
|
+
|
|
|
+ memcpy(gp2x_screenaddrs_use, gp2x_screenaddrs, sizeof(gp2x_screenaddrs));
|
|
|
+ gp2x_memset_all_buffers(0, 0, 320*240*2);
|
|
|
+
|
|
|
+ // snd
|
|
|
+ mixerdev = open("/dev/mixer", O_RDWR);
|
|
|
+ if (mixerdev == -1)
|
|
|
+ printf("open(\"/dev/mixer\") failed with %i\n", errno);
|
|
|
+
|
|
|
+ /* init usb joys -GnoStiC */
|
|
|
+ gp2x_usbjoy_init();
|
|
|
+
|
|
|
+ // touchscreen
|
|
|
+ touchdev = open("/dev/touchscreen/wm97xx", O_RDONLY);
|
|
|
+ if (touchdev >= 0) {
|
|
|
+ FILE *pcf = fopen("/etc/pointercal", "r");
|
|
|
+ if (pcf) {
|
|
|
+ fscanf(pcf, "%d %d %d %d %d %d %d", &touchcal[0], &touchcal[1],
|
|
|
+ &touchcal[2], &touchcal[3], &touchcal[4], &touchcal[5], &touchcal[6]);
|
|
|
+ fclose(pcf);
|
|
|
+ }
|
|
|
+ printf("found touchscreen/wm97xx\n");
|
|
|
+ }
|
|
|
+
|
|
|
+ /* disable Linux read-ahead */
|
|
|
+ proc_set("/proc/sys/vm/max-readahead", "0\n");
|
|
|
+ proc_set("/proc/sys/vm/min-readahead", "0\n");
|
|
|
+
|
|
|
+ printf("exitting init()\n"); fflush(stdout);
|
|
|
+}
|
|
|
+
|
|
|
+char *ext_menu = 0, *ext_state = 0;
|
|
|
+
|
|
|
+void gp2x_deinit(void)
|
|
|
+{
|
|
|
+ Reset940(1, 3);
|
|
|
+ Pause940(1);
|
|
|
+
|
|
|
+ gp2x_video_changemode(15);
|
|
|
+ gp2x_memregs[0x290E>>1] = gp2x_screenaddr_old[0];
|
|
|
+ gp2x_memregs[0x2910>>1] = gp2x_screenaddr_old[1];
|
|
|
+ gp2x_memregs[0x2912>>1] = gp2x_screenaddr_old[2];
|
|
|
+ gp2x_memregs[0x2914>>1] = gp2x_screenaddr_old[3];
|
|
|
+
|
|
|
+ munmap(gp2x_screens[0], FRAMEBUFF_WHOLESIZE);
|
|
|
+ munmap((void *)gp2x_memregs, 0x10000);
|
|
|
+ close(memdev);
|
|
|
+ close(mixerdev);
|
|
|
+ if (sounddev >= 0) close(sounddev);
|
|
|
+ if (touchdev >= 0) close(touchdev);
|
|
|
+
|
|
|
+ gp2x_usbjoy_deinit();
|
|
|
+
|
|
|
+ printf("all done, running ");
|
|
|
+
|
|
|
+ // Zaq121's alternative frontend support from MAME
|
|
|
+ if(ext_menu && ext_state) {
|
|
|
+ printf("%s -state %s\n", ext_menu, ext_state);
|
|
|
+ execl(ext_menu, ext_menu, "-state", ext_state, NULL);
|
|
|
+ } else if(ext_menu) {
|
|
|
+ printf("%s\n", ext_menu);
|
|
|
+ execl(ext_menu, ext_menu, NULL);
|
|
|
+ } else {
|
|
|
+ printf("gp2xmenu\n");
|
|
|
+ chdir("/usr/gp2x");
|
|
|
+ execl("gp2xmenu", "gp2xmenu", NULL);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+/* lprintf */
|
|
|
+void lprintf(const char *fmt, ...)
|
|
|
+{
|
|
|
+ va_list vl;
|
|
|
+
|
|
|
+ va_start(vl, fmt);
|
|
|
+ vprintf(fmt, vl);
|
|
|
+ va_end(vl);
|
|
|
+}
|
|
|
+
|
|
|
+
|
|
|
+/* fake GP2X */
|
|
|
+int crashed_940 = 0;
|
|
|
+
|
|
|
+int readpng(void *dest, const char *fname, int what) { return -1; }
|
|
|
+void set_gamma(int g100, int A_SNs_curve) {}
|
|
|
+void set_FCLK(unsigned MHZ) {}
|
|
|
+void set_LCD_custom_rate(int rate) {}
|
|
|
+void unset_LCD_custom_rate(void) {}
|
|
|
+
|