12 static volatile unsigned short *memregs;
13 static volatile unsigned long *memregl;
14 static int memdev = -1;
16 #define FB_BUF_COUNT 4
17 static unsigned int fb_paddr[FB_BUF_COUNT];
18 static int fb_work_buf;
19 static int fbdev = -1;
21 static void *gp2x_screens[FB_BUF_COUNT];
22 static void *g_screen_ptr;
25 static void vout_gp2x_flip(void)
27 memregl[0x406C>>2] = fb_paddr[fb_work_buf];
28 memregl[0x4058>>2] |= 0x10;
31 if (fb_work_buf >= FB_BUF_COUNT)
33 g_screen_ptr = gp2x_screens[fb_work_buf];
36 static int vout_gp2x_init(void)
38 struct fb_fix_screeninfo fbfix;
41 memdev = open("/dev/mem", O_RDWR);
43 perror("open(/dev/mem) failed");
47 memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
48 if (memregs == MAP_FAILED) {
49 perror("mmap(memregs) failed");
52 memregl = (volatile void *)memregs;
54 fbdev = open("/dev/fb0", O_RDWR);
56 perror("can't open fbdev");
60 ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
62 perror("ioctl(fbdev) failed");
66 printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
67 fb_paddr[0] = fbfix.smem_start;
69 gp2x_screens[0] = mmap(0, 320*240*2*FB_BUF_COUNT, PROT_READ|PROT_WRITE,
70 MAP_SHARED, memdev, fb_paddr[0]);
71 if (gp2x_screens[0] == MAP_FAILED)
73 perror("mmap(gp2x_screens) failed");
76 memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT);
78 printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
79 for (i = 1; i < FB_BUF_COUNT; i++)
81 fb_paddr[i] = fb_paddr[i-1] + 320*240*2;
82 gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2;
83 printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
86 g_screen_ptr = gp2x_screens[0];
91 void vout_gp2x_finish(void)
93 memregl[0x406C>>2] = fb_paddr[0];
94 memregl[0x4058>>2] |= 0x10;
97 munmap((void *)memregs, 0x20000);