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fb.h

#ifndef _LINUX_FB_H
#define _LINUX_FB_H

#include <asm/types.h>

/* Definitions of frame buffers                                   */

#define FB_MAJOR  29

#define FB_MODES_SHIFT        5     /* 32 modes per framebuffer */
#define FB_NUM_MINORS         256   /* 256 Minors               */
#define FB_MAX                (FB_NUM_MINORS / (1 << FB_MODES_SHIFT))
#define GET_FB_IDX(node)      (MINOR(node) >> FB_MODES_SHIFT)

/* ioctls
   0x46 is 'F'                                              */
#define FBIOGET_VSCREENINFO   0x4600
#define FBIOPUT_VSCREENINFO   0x4601
#define FBIOGET_FSCREENINFO   0x4602
#define FBIOGETCMAP           0x4604
#define FBIOPUTCMAP           0x4605
#define FBIOPAN_DISPLAY       0x4606
/* 0x4607-0x460B are defined below */
/* #define FBIOGET_MONITORSPEC      0x460C */
/* #define FBIOPUT_MONITORSPEC      0x460D */
/* #define FBIOSWITCH_MONIBIT 0x460E */
#define FBIOGET_CON2FBMAP     0x460F
#define FBIOPUT_CON2FBMAP     0x4610

#define FB_TYPE_PACKED_PIXELS       0     /* Packed Pixels  */
#define FB_TYPE_PLANES              1     /* Non interleaved planes */
#define FB_TYPE_INTERLEAVED_PLANES  2     /* Interleaved planes   */
#define FB_TYPE_TEXT                3     /* Text/attributes      */
#define FB_TYPE_VGA_PLANES          4     /* EGA/VGA planes */

#define FB_AUX_TEXT_MDA       0     /* Monochrome text */
#define FB_AUX_TEXT_CGA       1     /* CGA/EGA/VGA Color text */
#define FB_AUX_TEXT_S3_MMIO   2     /* S3 MMIO fasttext */
#define FB_AUX_TEXT_MGA_STEP16      3     /* MGA Millenium I: text, attr, 14 reserved bytes */
#define FB_AUX_TEXT_MGA_STEP8 4     /* other MGAs:      text, attr,  6 reserved bytes */

#define FB_AUX_VGA_PLANES_VGA4            0     /* 16 color planes (EGA/VGA) */
#define FB_AUX_VGA_PLANES_CFB4            1     /* CFB4 in planes (VGA) */
#define FB_AUX_VGA_PLANES_CFB8            2     /* CFB8 in planes (VGA) */

#define FB_VISUAL_MONO01            0     /* Monochr. 1=Black 0=White */
#define FB_VISUAL_MONO10            1     /* Monochr. 1=White 0=Black */
#define FB_VISUAL_TRUECOLOR         2     /* True color     */
#define FB_VISUAL_PSEUDOCOLOR       3     /* Pseudo color (like atari) */
#define FB_VISUAL_DIRECTCOLOR       4     /* Direct color */
#define FB_VISUAL_STATIC_PSEUDOCOLOR      5     /* Pseudo color readonly */

#define FB_ACCEL_NONE         0     /* no hardware accelerator    */
#define FB_ACCEL_ATARIBLITT   1     /* Atari Blitter        */
#define FB_ACCEL_AMIGABLITT   2     /* Amiga Blitter                */
#define FB_ACCEL_S3_TRIO64    3     /* Cybervision64 (S3 Trio64)    */
#define FB_ACCEL_NCR_77C32BLT 4     /* RetinaZ3 (NCR 77C32BLT)      */
#define FB_ACCEL_S3_VIRGE     5     /* Cybervision64/3D (S3 ViRGE)      */
#define FB_ACCEL_ATI_MACH64GX 6     /* ATI Mach 64GX family       */
#define FB_ACCEL_DEC_TGA      7     /* DEC 21030 TGA        */
#define FB_ACCEL_ATI_MACH64CT 8     /* ATI Mach 64CT family       */
#define FB_ACCEL_ATI_MACH64VT 9     /* ATI Mach 64CT family VT class */
#define FB_ACCEL_ATI_MACH64GT 10    /* ATI Mach 64CT family GT class */
#define FB_ACCEL_SUN_CREATOR  11    /* Sun Creator/Creator3D      */
#define FB_ACCEL_SUN_CGSIX    12    /* Sun cg6              */
#define FB_ACCEL_SUN_LEO      13    /* Sun leo/zx                 */
#define FB_ACCEL_IMS_TWINTURBO      14    /* IMS Twin Turbo       */
#define FB_ACCEL_3DLABS_PERMEDIA2 15      /* 3Dlabs Permedia 2          */
#define FB_ACCEL_MATROX_MGA2064W 16 /* Matrox MGA2064W (Millenium)      */
#define FB_ACCEL_MATROX_MGA1064SG 17      /* Matrox MGA1064SG (Mystique)      */
#define FB_ACCEL_MATROX_MGA2164W 18 /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGA2164W_AGP 19   /* Matrox MGA2164W (Millenium II) */
#define FB_ACCEL_MATROX_MGAG100     20    /* Matrox G100 (Productiva G100) */
#define FB_ACCEL_MATROX_MGAG200     21    /* Matrox G200 (Myst, Mill, ...) */
#define FB_ACCEL_SUN_CG14     22    /* Sun cgfourteen        */
#define FB_ACCEL_SUN_BWTWO    23    /* Sun bwtwo                   */
#define FB_ACCEL_SUN_CGTHREE  24    /* Sun cgthree                 */
#define FB_ACCEL_SUN_TCX      25    /* Sun tcx               */
#define FB_ACCEL_MATROX_MGAG400     26    /* Matrox G400                 */

struct fb_fix_screeninfo {
      char id[16];                  /* identification string eg "TT Builtin" */
      char *smem_start;       /* Start of frame buffer mem */
                              /* (physical address) */
      __u32 smem_len;               /* Length of frame buffer mem */
      __u32 type;             /* see FB_TYPE_*        */
      __u32 type_aux;               /* Interleave for interleaved Planes */
      __u32 visual;                 /* see FB_VISUAL_*            */ 
      __u16 xpanstep;               /* zero if no hardware panning  */
      __u16 ypanstep;               /* zero if no hardware panning  */
      __u16 ywrapstep;        /* zero if no hardware ywrap    */
      __u32 line_length;            /* length of a line in bytes    */
      char *mmio_start;       /* Start of Memory Mapped I/O   */
                              /* (physical address) */
      __u32 mmio_len;               /* Length of Memory Mapped I/O  */
      __u32 accel;                  /* Type of acceleration available */
      __u16 reserved[3];            /* Reserved for future compatibility */
};

/* Interpretation of offset for color fields: All offsets are from the right,
 * inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you
 * can use the offset as right argument to <<). A pixel afterwards is a bit
 * stream and is written to video memory as that unmodified. This implies
 * big-endian byte order if bits_per_pixel is greater than 8.
 */
struct fb_bitfield {
      __u32 offset;                 /* beginning of bitfield      */
      __u32 length;                 /* length of bitfield         */
      __u32 msb_right;        /* != 0 : Most significant bit is */ 
                              /* right */ 
};

#define FB_NONSTD_HAM         1     /* Hold-And-Modify (HAM)        */

#define FB_ACTIVATE_NOW       0     /* set values immediately (or vbl)*/
#define FB_ACTIVATE_NXTOPEN   1     /* activate on next open      */
#define FB_ACTIVATE_TEST      2     /* don't set, round up impossible */
#define FB_ACTIVATE_MASK       15
                              /* values               */
#define FB_ACTIVATE_VBL        16   /* activate values on next vbl  */
#define FB_CHANGE_CMAP_VBL     32   /* change colormap on vbl     */
#define FB_ACTIVATE_ALL        64   /* change all VCs on this fb  */

#define FB_ACCELF_TEXT        1     /* text mode acceleration */

#define FB_SYNC_HOR_HIGH_ACT  1     /* horizontal sync high active      */
#define FB_SYNC_VERT_HIGH_ACT 2     /* vertical sync high active  */
#define FB_SYNC_EXT           4     /* external sync        */
#define FB_SYNC_COMP_HIGH_ACT 8     /* composite sync high active   */
#define FB_SYNC_BROADCAST     16    /* broadcast video timings      */
                              /* vtotal = 144d/288n/576i => PAL  */
                              /* vtotal = 121d/242n/484i => NTSC */
#define FB_SYNC_ON_GREEN      32    /* sync on green */

#define FB_VMODE_NONINTERLACED  0   /* non interlaced */
#define FB_VMODE_INTERLACED   1     /* interlaced     */
#define FB_VMODE_DOUBLE       2     /* double scan */
#define FB_VMODE_MASK         255

#define FB_VMODE_YWRAP        256   /* ywrap instead of panning     */
#define FB_VMODE_SMOOTH_XPAN  512   /* smooth xpan possible (internally used) */
#define FB_VMODE_CONUPDATE    512   /* don't update x/yoffset     */

struct fb_var_screeninfo {
      __u32 xres;             /* visible resolution         */
      __u32 yres;
      __u32 xres_virtual;           /* virtual resolution         */
      __u32 yres_virtual;
      __u32 xoffset;                /* offset from virtual to visible */
      __u32 yoffset;                /* resolution                 */

      __u32 bits_per_pixel;         /* guess what                 */
      __u32 grayscale;        /* != 0 Graylevels instead of colors */

      struct fb_bitfield red;       /* bitfield in fb mem if true color, */
      struct fb_bitfield green;     /* else only length is significant */
      struct fb_bitfield blue;
      struct fb_bitfield transp;    /* transparency               */    

      __u32 nonstd;                 /* != 0 Non standard pixel format */

      __u32 activate;               /* see FB_ACTIVATE_*          */

      __u32 height;                 /* height of picture in mm    */
      __u32 width;                  /* width of picture in mm     */

      __u32 accel_flags;            /* acceleration flags (hints) */

      /* Timing: All values in pixclocks, except pixclock (of course) */
      __u32 pixclock;               /* pixel clock in ps (pico seconds) */
      __u32 left_margin;            /* time from sync to picture  */
      __u32 right_margin;           /* time from picture to sync  */
      __u32 upper_margin;           /* time from sync to picture  */
      __u32 lower_margin;
      __u32 hsync_len;        /* length of horizontal sync  */
      __u32 vsync_len;        /* length of vertical sync    */
      __u32 sync;             /* see FB_SYNC_*        */
      __u32 vmode;                  /* see FB_VMODE_*       */
      __u32 reserved[6];            /* Reserved for future compatibility */
};

struct fb_cmap {
      __u32 start;                  /* First entry    */
      __u32 len;              /* Number of entries */
      __u16 *red;             /* Red values     */
      __u16 *green;
      __u16 *blue;
      __u16 *transp;                /* transparency, can be NULL */
};

struct fb_con2fbmap {
      __u32 console;
      __u32 framebuffer;
};

struct fb_monspecs {
      __u32 hfmin;                  /* hfreq lower limit (Hz) */
      __u32 hfmax;                  /* hfreq upper limit (Hz) */
      __u16 vfmin;                  /* vfreq lower limit (Hz) */
      __u16 vfmax;                  /* vfreq upper limit (Hz) */
      unsigned dpms : 1;            /* supports DPMS */
};

#ifdef __KERNEL__

#include <linux/fs.h>


struct fb_info;
struct fb_info_gen;
struct vm_area_struct;
struct file;

    /*
     *  Frame buffer operations
     */

struct fb_ops {
    /* open/release and usage marking */
    int (*fb_open)(struct fb_info *info, int user);
    int (*fb_release)(struct fb_info *info, int user);
    /* get non settable parameters */
    int (*fb_get_fix)(struct fb_fix_screeninfo *fix, int con,
                  struct fb_info *info); 
    /* get settable parameters */
    int (*fb_get_var)(struct fb_var_screeninfo *var, int con,
                  struct fb_info *info);        
    /* set settable parameters */
    int (*fb_set_var)(struct fb_var_screeninfo *var, int con,
                  struct fb_info *info);        
    /* get colormap */
    int (*fb_get_cmap)(struct fb_cmap *cmap, int kspc, int con,
                   struct fb_info *info);
    /* set colormap */
    int (*fb_set_cmap)(struct fb_cmap *cmap, int kspc, int con,
                   struct fb_info *info);
    /* pan display */
    int (*fb_pan_display)(struct fb_var_screeninfo *var, int con,
                    struct fb_info *info);
    /* perform fb specific ioctl */
    int (*fb_ioctl)(struct inode *inode, struct file *file, unsigned int cmd,
                unsigned long arg, int con, struct fb_info *info);
    /* perform fb specific mmap */
    int (*fb_mmap)(struct fb_info *info, struct file *file, struct vm_area_struct *vma);
    /* switch to/from raster image mode */
    int (*fb_rasterimg)(struct fb_info *info, int start);
};


   /*
    *    This is the interface between the low-level console driver and the
    *    low-level frame buffer device
    */

struct display {
    /* Filled in by the frame buffer device */

    struct fb_var_screeninfo var;   /* variable infos. yoffset and vmode */
                            /* are updated by fbcon.c */
    struct fb_cmap cmap;            /* colormap */
    char *screen_base;              /* pointer to top of virtual screen */    
                            /* (virtual address) */
    int visual;
    int type;                       /* see FB_TYPE_* */
    int type_aux;                   /* Interleave for interleaved Planes */
    u_short ypanstep;               /* zero if no hardware ypan */
    u_short ywrapstep;              /* zero if no hardware ywrap */
    u_long line_length;             /* length of a line in bytes */
    u_short can_soft_blank;         /* zero if no hardware blanking */
    u_short inverse;                /* != 0 text black on white as default */
    struct display_switch *dispsw;  /* low level operations */
    void *dispsw_data;            /* optional dispsw helper data */

#if 0
    struct fb_fix_cursorinfo fcrsr;
    struct fb_var_cursorinfo *vcrsr;
    struct fb_cursorstate crsrstate;
#endif

    /* Filled in by the low-level console driver */

    struct vc_data *conp;           /* pointer to console data */
    struct fb_info *fb_info;        /* frame buffer for this console */
    int vrows;                      /* number of virtual rows */
    unsigned short cursor_x;      /* current cursor position */
    unsigned short cursor_y;
    int fgcol;                      /* text colors */
    int bgcol;
    u_long next_line;               /* offset to one line below */
    u_long next_plane;              /* offset to next plane */
    u_char *fontdata;               /* Font associated to this display */
    unsigned short _fontheightlog;
    unsigned short _fontwidthlog;
    unsigned short _fontheight;
    unsigned short _fontwidth;
    int userfont;                   /* != 0 if fontdata kmalloc()ed */
    u_short scrollmode;             /* Scroll Method */
    short yscroll;                  /* Hardware scrolling */
    unsigned char fgshift, bgshift;
    unsigned short charmask;      /* 0xff or 0x1ff */
};


struct fb_info {
   char modename[40];               /* default video mode */
   kdev_t node;
   int flags;
#define FBINFO_FLAG_MODULE    1     /* Low-level driver is a module */
   struct fb_ops *fbops;
   struct fb_monspecs monspecs;
   struct display *disp;            /* initial display variable */
   struct vc_data *display_fg;            /* Console visible on this display */
   char fontname[40];               /* default font name */
   int (*changevar)(int);           /* tell console var has changed */
   int (*switch_con)(int, struct fb_info*);
                              /* tell fb to switch consoles */
   int (*updatevar)(int, struct fb_info*);
                              /* tell fb to update the vars */
   void (*blank)(int, struct fb_info*);   /* tell fb to (un)blank the screen */
                              /* arg = 0: unblank */
                              /* arg > 0: VESA level (arg-1) */

   /* From here on everything is device dependent */
};

#ifdef MODULE
#define FBINFO_FLAG_DEFAULT   FBINFO_FLAG_MODULE
#else
#define FBINFO_FLAG_DEFAULT   0
#endif

    /*
     *  This structure abstracts from the underlying hardware. It is not
     *  mandatory but used by the `generic' frame buffer operations.
     *  Read drivers/video/skeletonfb.c for more information.
     */

struct fbgen_hwswitch {
    void (*detect)(void);
    int (*encode_fix)(struct fb_fix_screeninfo *fix, const void *par,
                  struct fb_info_gen *info);
    int (*decode_var)(const struct fb_var_screeninfo *var, void *par,
                  struct fb_info_gen *info);
    int (*encode_var)(struct fb_var_screeninfo *var, const void *par,
                  struct fb_info_gen *info);
    void (*get_par)(void *par, struct fb_info_gen *info);
    void (*set_par)(const void *par, struct fb_info_gen *info);
    int (*getcolreg)(unsigned regno, unsigned *red, unsigned *green,
                 unsigned *blue, unsigned *transp, struct fb_info *info);
    int (*setcolreg)(unsigned regno, unsigned red, unsigned green,
                 unsigned blue, unsigned transp, struct fb_info *info);
    int (*pan_display)(const struct fb_var_screeninfo *var,
                   struct fb_info_gen *info);
    int (*blank)(int blank_mode, struct fb_info_gen *info);
    void (*set_disp)(const void *par, struct display *disp,
                 struct fb_info_gen *info);
};

struct fb_info_gen {
    struct fb_info info;

    /* Entries for a generic frame buffer device */
    /* Yes, this starts looking like C++ */
    u_int parsize;
    struct fbgen_hwswitch *fbhw;

   /* From here on everything is device dependent */
};

    /*
     *  `Generic' versions of the frame buffer device operations
     */

extern int fbgen_get_fix(struct fb_fix_screeninfo *fix, int con,
                   struct fb_info *info);
extern int fbgen_get_var(struct fb_var_screeninfo *var, int con,
                   struct fb_info *info);
extern int fbgen_set_var(struct fb_var_screeninfo *var, int con,
                   struct fb_info *info);
extern int fbgen_get_cmap(struct fb_cmap *cmap, int kspc, int con,
                    struct fb_info *info);
extern int fbgen_set_cmap(struct fb_cmap *cmap, int kspc, int con,
                    struct fb_info *info);
extern int fbgen_pan_display(struct fb_var_screeninfo *var, int con,
                       struct fb_info *info);
extern int fbgen_ioctl(struct inode *inode, struct file *file,
                   unsigned int cmd, unsigned long arg, int con,
                   struct fb_info *info);

    /*
     *  Helper functions
     */

extern int fbgen_do_set_var(struct fb_var_screeninfo *var, int isactive,
                      struct fb_info_gen *info);
extern void fbgen_set_disp(int con, struct fb_info_gen *info);
extern void fbgen_install_cmap(int con, struct fb_info_gen *info);
extern int fbgen_update_var(int con, struct fb_info *info);
extern int fbgen_switch(int con, struct fb_info *info);
extern void fbgen_blank(int blank, struct fb_info *info);


struct fb_videomode {
    const char *name;
    struct fb_var_screeninfo var;
};


/* drivers/char/fbmem.c */
extern int register_framebuffer(struct fb_info *fb_info);
extern int unregister_framebuffer(const struct fb_info *fb_info);
extern int fbmon_valid_timings(u_int pixclock, u_int htotal, u_int vtotal,
                         const struct fb_info *fb_info);
extern int fbmon_dpms(const struct fb_info *fb_info);


extern int num_registered_fb;
extern struct fb_info *registered_fb[FB_MAX];
extern char con2fb_map[MAX_NR_CONSOLES];

/* drivers/video/fbcon.c */
extern struct display fb_display[MAX_NR_CONSOLES];

/* drivers/video/fbcmap.c */
extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
extern void fb_copy_cmap(struct fb_cmap *from, struct fb_cmap *to,
                   int fsfromto);
extern int fb_get_cmap(struct fb_cmap *cmap, int kspc,
                   int (*getcolreg)(u_int, u_int *, u_int *, u_int *,
                              u_int *, struct fb_info *),
                   struct fb_info *fb_info);
extern int fb_set_cmap(struct fb_cmap *cmap, int kspc,
                   int (*setcolreg)(u_int, u_int, u_int, u_int, u_int,
                              struct fb_info *),
                   struct fb_info *fb_info);
extern struct fb_cmap *fb_default_cmap(int len);
extern void fb_invert_cmaps(void);

/* VESA Blanking Levels */
#define VESA_NO_BLANKING      0
#define VESA_VSYNC_SUSPEND    1
#define VESA_HSYNC_SUSPEND    2
#define VESA_POWERDOWN        3

#endif /* __KERNEL__ */

#if 1

#define FBCMD_GET_CURRENTPAR  0xDEAD0005
#define FBCMD_SET_CURRENTPAR  0xDEAD8005

#endif


#if 1 /* Preliminary */

   /*
    *    Hardware Cursor
    */

#define FBIOGET_FCURSORINFO     0x4607
#define FBIOGET_VCURSORINFO     0x4608
#define FBIOPUT_VCURSORINFO     0x4609
#define FBIOGET_CURSORSTATE     0x460A
#define FBIOPUT_CURSORSTATE     0x460B


struct fb_fix_cursorinfo {
      __u16 crsr_width;       /* width and height of the cursor in */
      __u16 crsr_height;            /* pixels (zero if no cursor) */
      __u16 crsr_xsize;       /* cursor size in display pixels */
      __u16 crsr_ysize;
      __u16 crsr_color1;            /* colormap entry for cursor color1 */
      __u16 crsr_color2;            /* colormap entry for cursor color2 */
};

struct fb_var_cursorinfo {
      __u16 width;
      __u16 height;
      __u16 xspot;
      __u16 yspot;
      __u8 data[1];                 /* field with [height][width]        */
};

struct fb_cursorstate {
      __s16 xoffset;
      __s16 yoffset;
      __u16 mode;
};

#define FB_CURSOR_OFF         0
#define FB_CURSOR_ON          1
#define FB_CURSOR_FLASH       2

#endif /* Preliminary */

#endif /* _LINUX_FB_H */

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