include/fb.h

   1 #ifndef __FB_H
   2 #define __FB_H
   3
   4 #include <ioctl.h>
   5 #include <param.h>
   6
   7 #define FB_VISUAL_TRUECOLOR             2       /* True color   */
   8 #define FB_VISUAL_PSEUDOCOLOR           3       /* Pseudo color (like atari) */
   9 #define FB_VISUAL_DIRECTCOLOR           4       /* Direct color */
  10 #define FB_VISUAL_STATIC_PSEUDOCOLOR    5       /* Pseudo color readonly */
  11
  12 struct fb_videomode {
  13         const char *name;       /* optional */
  14         u32 refresh;            /* optional */
  15         u32 xres;
  16         u32 yres;
  17         u32 pixclock;
  18         u32 left_margin;
  19         u32 right_margin;
  20         u32 upper_margin;
  21         u32 lower_margin;
  22         u32 hsync_len;
  23         u32 vsync_len;
  24         u32 sync;
  25         u32 vmode;
  26         u32 flag;
  27 };
  28
  29 /* Interpretation of offset for color fields: All offsets are from the right,
  30  * inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
  31  * can use the offset as right argument to <<). A pixel afterwards is a bit
  32  * stream and is written to video memory as that unmodified.
  33  *
  34  * For pseudocolor: offset and length should be the same for all color
  35  * components. Offset specifies the position of the least significant bit
  36  * of the pallette index in a pixel value. Length indicates the number
  37  * of available palette entries (i.e. # of entries = 1 << length).
  38  */
  39 struct fb_bitfield {
  40         u32 offset;                     /* beginning of bitfield        */
  41         u32 length;                     /* length of bitfield           */
  42         u32 msb_right;                  /* != 0 : Most significant bit is */
  43                                         /* right */
  44 };
  45
  46 struct fb_info;
  47
  48 struct fb_ops {
  49         /* set color register */
  50         int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
  51                             unsigned blue, unsigned transp, struct fb_info *info);
  52         void (*fb_enable)(struct fb_info *info);
  53         void (*fb_disable)(struct fb_info *info);
  54 };
  55
  56 struct fb_info {
  57         struct fb_videomode *mode;
  58
  59         struct fb_ops *fbops;
  60         struct device_d dev;            /* This is this fb device */
  61         struct param_d param_enable;
  62         char enable_string[1];
  63
  64         void *screen_base;
  65
  66         void *priv;
  67
  68         struct cdev cdev;
  69
  70         u32 xres;                       /* visible resolution           */
  71         u32 yres;
  72         u32 bits_per_pixel;             /* guess what                   */
  73
  74         u32 grayscale;                  /* != 0 Graylevels instead of colors */
  75
  76         struct fb_bitfield red;         /* bitfield in fb mem if true color, */
  77         struct fb_bitfield green;       /* else only length is significant */
  78         struct fb_bitfield blue;
  79         struct fb_bitfield transp;      /* transparency                 */
  80 };
  81
  82 int register_framebuffer(struct fb_info *info);
  83
  84 #define FBIOGET_SCREENINFO      _IOR('F', 1, loff_t)
  85 #define FBIO_ENABLE             _IO('F', 2)
  86 #define FBIO_DISABLE            _IO('F', 3)
  87
  88 #endif /* __FB_H */
  89