1 #include <stdio.h>

2 #include <string.h>

3 #include <errno.h>

4 #include <unistd.h>

5 #include <fcntl.h>

6 #include <sys/ioctl.h>

7 #include <sys/select.h>

8 #include <linux/fb.h>

9

10 static int fbfd;

11 static void *framebuf;

12

13 static int width, height, bpp;

14 static int dirty;

15

16 int fbee_sys_init(void)

17 {

18 struct fb_var_screeninfo sinf;

19 struct termios termios;

20

21 /* open framebuffer device */

22 if((fbfd = open("/dev/fb0", O_RDWR)) == -1) {

23 fprintf(stderr, "failed to open /dev/fb0: %s\n", strerror(errno));

24 return -1;

25 }

26

27 if(ioctl(fbfd, FBIOGET_VSCREENINFO, &sinf) == -1) {

28 fprintf(stderr, "failed to retreive screen information for fb0: %s\n", strerror(errno));

29 close(fbfd);

30 fbfd = -1;

31 return -1;

32 }

33 width = sinf.width;

34 height = sinf.height;

35 bpp = sinf.bits_per_pixel;

36

37 if((framebuf = mmap(0, width * height * bpp / 8, PROT_READ | PROT_WRITE,

38 MAP_SHARED, fbfd, 0)) == (void*)-1) {

39 fprintf(stderr, "failed to map framebuffer: %s\n", strerror(errno));

40 return -1;

41 }

42

43

44 /* set terminal in raw mode */

45 if(tcgetattr(0, &termios) == -1) {

46 fprintf(stderr, "failed to get terminal information: %s\n", strerror(errno));

47 munmap(framebuf, width * height * bpp / 8);

48 return -1;

49 }

50

51 /* open /dev/psaux for mouse input */

52 if((mousefd = open("/dev/psaux", O_RDONLY | O_NONBLOCK)) == -1) {

53 fprintf(stderr, "Failed to open the mouse device: %s, mouse will be unavailable.\n", strerror(errno));

54 }

55

56 return 0;

57 }