| 1 | #include <stdio.h> |
| 2 | #include <stdlib.h> |
| 3 | #include <string.h> |
| 4 | #include <sys/types.h> |
| 5 | #include <sys/stat.h> |
| 6 | #include <fcntl.h> |
| 7 | #include <sys/ioctl.h> |
| 8 | #include <sys/mman.h> |
| 9 | #include <unistd.h> |
| 10 | #include <linux/fb.h> |
| 11 | |
| 12 | static volatile unsigned short *memregs; |
| 13 | static volatile unsigned long *memregl; |
| 14 | static int memdev = -1; |
| 15 | |
| 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; |
| 20 | |
| 21 | static void *gp2x_screens[FB_BUF_COUNT]; |
| 22 | static void *g_screen_ptr; |
| 23 | |
| 24 | |
| 25 | static void vout_gp2x_flip(void) |
| 26 | { |
| 27 | memregl[0x406C>>2] = fb_paddr[fb_work_buf]; |
| 28 | memregl[0x4058>>2] |= 0x10; |
| 29 | |
| 30 | fb_work_buf++; |
| 31 | if (fb_work_buf >= FB_BUF_COUNT) |
| 32 | fb_work_buf = 0; |
| 33 | g_screen_ptr = gp2x_screens[fb_work_buf]; |
| 34 | } |
| 35 | |
| 36 | static int vout_gp2x_init(void) |
| 37 | { |
| 38 | struct fb_fix_screeninfo fbfix; |
| 39 | int i, ret; |
| 40 | |
| 41 | memdev = open("/dev/mem", O_RDWR); |
| 42 | if (memdev == -1) { |
| 43 | perror("open(/dev/mem) failed"); |
| 44 | exit(1); |
| 45 | } |
| 46 | |
| 47 | memregs = mmap(0, 0x20000, PROT_READ|PROT_WRITE, MAP_SHARED, memdev, 0xc0000000); |
| 48 | if (memregs == MAP_FAILED) { |
| 49 | perror("mmap(memregs) failed"); |
| 50 | exit(1); |
| 51 | } |
| 52 | memregl = (volatile void *)memregs; |
| 53 | |
| 54 | fbdev = open("/dev/fb0", O_RDWR); |
| 55 | if (fbdev < 0) { |
| 56 | perror("can't open fbdev"); |
| 57 | exit(1); |
| 58 | } |
| 59 | |
| 60 | ret = ioctl(fbdev, FBIOGET_FSCREENINFO, &fbfix); |
| 61 | if (ret == -1) { |
| 62 | perror("ioctl(fbdev) failed"); |
| 63 | exit(1); |
| 64 | } |
| 65 | |
| 66 | printf("framebuffer: \"%s\" @ %08lx\n", fbfix.id, fbfix.smem_start); |
| 67 | fb_paddr[0] = fbfix.smem_start; |
| 68 | |
| 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) |
| 72 | { |
| 73 | perror("mmap(gp2x_screens) failed"); |
| 74 | exit(1); |
| 75 | } |
| 76 | memset(gp2x_screens[0], 0, 320*240*2*FB_BUF_COUNT); |
| 77 | |
| 78 | printf(" %p -> %08x\n", gp2x_screens[0], fb_paddr[0]); |
| 79 | for (i = 1; i < FB_BUF_COUNT; i++) |
| 80 | { |
| 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]); |
| 84 | } |
| 85 | fb_work_buf = 0; |
| 86 | g_screen_ptr = gp2x_screens[0]; |
| 87 | |
| 88 | return 0; |
| 89 | } |
| 90 | |
| 91 | void vout_gp2x_finish(void) |
| 92 | { |
| 93 | memregl[0x406C>>2] = fb_paddr[0]; |
| 94 | memregl[0x4058>>2] |= 0x10; |
| 95 | close(fbdev); |
| 96 | |
| 97 | munmap((void *)memregs, 0x20000); |
| 98 | close(memdev); |
| 99 | } |
| 100 | |