13 static volatile unsigned short *memregs;
14 static volatile unsigned long *memregl;
17 #define FB_BUF_COUNT 4
18 static unsigned int fb_paddr[FB_BUF_COUNT];
19 static int fb_buf_count = FB_BUF_COUNT;
20 static int fb_work_buf;
21 static int fbdev = -1;
23 static void *gp2x_screens[FB_BUF_COUNT];
24 static void *g_screen_ptr;
27 static void vout_gp2x_flip(void)
29 memregl[0x406C>>2] = fb_paddr[fb_work_buf];
30 memregl[0x4058>>2] |= 0x10;
33 if (fb_work_buf >= fb_buf_count)
35 g_screen_ptr = gp2x_screens[fb_work_buf];
38 static int vout_gp2x_init(int no_dblbuf)
40 struct fb_fix_screeninfo fbfix;
43 memdev = open("/dev/mem", O_RDWR);
45 perror("open(/dev/mem) failed");
49 memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000);
50 if (memregs == MAP_FAILED) {
51 perror("mmap(memregs) failed");
54 memregl = (volatile void *)memregs;
56 fbdev = open("/dev/fb0", O_RDWR);
58 perror("can't open fbdev");
62 ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix);
64 perror("ioctl(fbdev) failed");
68 printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start);
69 fb_paddr[0] = fbfix.smem_start;
71 gp2x_screens[0] = mmap(0, 320*240*2*FB_BUF_COUNT, PROT_READ|PROT_WRITE,
72 MAP_SHARED, memdev, fb_paddr[0]);
73 if (gp2x_screens[0] == MAP_FAILED)
75 perror("mmap(gp2x_screens) failed");
78 memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT);
82 ret = warm_change_cb_range(WCB_B_BIT, 1, gp2x_screens[0], 320*240*2*FB_BUF_COUNT);
84 fprintf(stderr, "could not make fb buferable.\n");
87 printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]);
88 for (i = 1; i < FB_BUF_COUNT; i++)
90 fb_paddr[i] = fb_paddr[i-1] + 320*240*2;
91 gp2x_screens[i] = (char *)gp2x_screens[i-1] + 320*240*2;
92 printf(" %p -> %08x\n", gp2x_screens[i], fb_paddr[i]);
95 g_screen_ptr = gp2x_screens[0];
103 void vout_gp2x_finish(void)
105 memregl[0x406C>>2] = fb_paddr[0];
106 memregl[0x4058>>2] |= 0x10;
109 munmap((void *)memregs, 0x20000);