fb.h

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#ifndef _LINUX_FB_H
#define _LINUX_FB_H

#include <linux/kgdb.h>
#include <uapi/linux/fb.h>

#define FBIO_CURSOR            _IOWR('F', 0x08, struct fb_cursor_user)

#include <linux/fs.h>
#include <linux/init.h>
#include <linux/workqueue.h>
#include <linux/notifier.h>
#include <linux/list.h>
#include <linux/backlight.h>
#include <linux/slab.h>
#include <asm/io.h>

struct vm_area_struct;
struct fb_info;
struct device;
struct file;

/* Definitions below are used in the parsed monitor specs */
#define FB_DPMS_ACTIVE_OFF  1
#define FB_DPMS_SUSPEND     2
#define FB_DPMS_STANDBY     4

#define FB_DISP_DDI     1
#define FB_DISP_ANA_700_300 2
#define FB_DISP_ANA_714_286 4
#define FB_DISP_ANA_1000_400    8
#define FB_DISP_ANA_700_000 16

#define FB_DISP_MONO        32
#define FB_DISP_RGB     64
#define FB_DISP_MULTI       128
#define FB_DISP_UNKNOWN     256

#define FB_SIGNAL_NONE      0
#define FB_SIGNAL_BLANK_BLANK   1
#define FB_SIGNAL_SEPARATE  2
#define FB_SIGNAL_COMPOSITE 4
#define FB_SIGNAL_SYNC_ON_GREEN 8
#define FB_SIGNAL_SERRATION_ON  16

#define FB_MISC_PRIM_COLOR  1
#define FB_MISC_1ST_DETAIL  2   /* First Detailed Timing is preferred */
struct fb_chroma {
    __u32 redx; /* in fraction of 1024 */
    __u32 greenx;
    __u32 bluex;
    __u32 whitex;
    __u32 redy;
    __u32 greeny;
    __u32 bluey;
    __u32 whitey;
};

struct fb_monspecs {
    struct fb_chroma chroma;
    struct fb_videomode *modedb;    /* mode database */
    __u8  manufacturer[4];      /* Manufacturer */
    __u8  monitor[14];      /* Monitor String */
    __u8  serial_no[14];        /* Serial Number */
    __u8  ascii[14];        /* ? */
    __u32 modedb_len;       /* mode database length */
    __u32 model;            /* Monitor Model */
    __u32 serial;           /* Serial Number - Integer */
    __u32 year;         /* Year manufactured */
    __u32 week;         /* Week Manufactured */
    __u32 hfmin;            /* hfreq lower limit (Hz) */
    __u32 hfmax;            /* hfreq upper limit (Hz) */
    __u32 dclkmin;          /* pixelclock lower limit (Hz) */
    __u32 dclkmax;          /* pixelclock upper limit (Hz) */
    __u16 input;            /* display type - see FB_DISP_* */
    __u16 dpms;         /* DPMS support - see FB_DPMS_ */
    __u16 signal;           /* Signal Type - see FB_SIGNAL_* */
    __u16 vfmin;            /* vfreq lower limit (Hz) */
    __u16 vfmax;            /* vfreq upper limit (Hz) */
    __u16 gamma;            /* Gamma - in fractions of 100 */
    __u16 gtf   : 1;        /* supports GTF */
    __u16 misc;         /* Misc flags - see FB_MISC_* */
    __u8  version;          /* EDID version... */
    __u8  revision;         /* ...and revision */
    __u8  max_x;            /* Maximum horizontal size (cm) */
    __u8  max_y;            /* Maximum vertical size (cm) */
};

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

struct fb_image_user {
    __u32 dx;           /* Where to place image */
    __u32 dy;
    __u32 width;            /* Size of image */
    __u32 height;
    __u32 fg_color;         /* Only used when a mono bitmap */
    __u32 bg_color;
    __u8  depth;            /* Depth of the image */
    const char __user *data;    /* Pointer to image data */
    struct fb_cmap_user cmap;   /* color map info */
};

struct fb_cursor_user {
    __u16 set;          /* what to set */
    __u16 enable;           /* cursor on/off */
    __u16 rop;          /* bitop operation */
    const char __user *mask;    /* cursor mask bits */
    struct fbcurpos hot;        /* cursor hot spot */
    struct fb_image_user image; /* Cursor image */
};

/*
 * Register/unregister for framebuffer events
 */

/*  The resolution of the passed in fb_info about to change */ 
#define FB_EVENT_MODE_CHANGE        0x01
/*  The display on this fb_info is beeing suspended, no access to the
 *  framebuffer is allowed any more after that call returns
 */
#define FB_EVENT_SUSPEND        0x02
/*  The display on this fb_info was resumed, you can restore the display
 *  if you own it
 */
#define FB_EVENT_RESUME         0x03
/*      An entry from the modelist was removed */
#define FB_EVENT_MODE_DELETE            0x04
/*      A driver registered itself */
#define FB_EVENT_FB_REGISTERED          0x05
/*      A driver unregistered itself */
#define FB_EVENT_FB_UNREGISTERED        0x06
/*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
#define FB_EVENT_GET_CONSOLE_MAP        0x07
/*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
#define FB_EVENT_SET_CONSOLE_MAP        0x08
/*      A hardware display blank change occurred */
#define FB_EVENT_BLANK                  0x09
/*      Private modelist is to be replaced */
#define FB_EVENT_NEW_MODELIST           0x0A
/*  The resolution of the passed in fb_info about to change and
        all vc's should be changed         */
#define FB_EVENT_MODE_CHANGE_ALL    0x0B
/*  A software display blank change occurred */
#define FB_EVENT_CONBLANK               0x0C
/*      Get drawing requirements        */
#define FB_EVENT_GET_REQ                0x0D
/*      Unbind from the console if possible */
#define FB_EVENT_FB_UNBIND              0x0E
/*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga switcheroo */
#define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
/*      A hardware display blank early change occured */
#define FB_EARLY_EVENT_BLANK        0x10
/*      A hardware display blank revert early change occured */
#define FB_R_EARLY_EVENT_BLANK      0x11

struct fb_event {
    struct fb_info *info;
    void *data;
};

struct fb_blit_caps {
    u32 x;
    u32 y;
    u32 len;
    u32 flags;
};

extern int fb_register_client(struct notifier_block *nb);
extern int fb_unregister_client(struct notifier_block *nb);
extern int fb_notifier_call_chain(unsigned long val, void *v);
/*
 * Pixmap structure definition
 *
 * The purpose of this structure is to translate data
 * from the hardware independent format of fbdev to what
 * format the hardware needs.
 */

#define FB_PIXMAP_DEFAULT 1     /* used internally by fbcon */
#define FB_PIXMAP_SYSTEM  2     /* memory is in system RAM  */
#define FB_PIXMAP_IO      4     /* memory is iomapped       */
#define FB_PIXMAP_SYNC    256   /* set if GPU can DMA       */

struct fb_pixmap {
    u8  *addr;      /* pointer to memory            */
    u32 size;       /* size of buffer in bytes      */
    u32 offset;     /* current offset to buffer     */
    u32 buf_align;      /* byte alignment of each bitmap    */
    u32 scan_align;     /* alignment per scanline       */
    u32 access_align;   /* alignment per read/write (bits)  */
    u32 flags;      /* see FB_PIXMAP_*          */
    u32 blit_x;             /* supported bit block dimensions (1-32)*/
    u32 blit_y;             /* Format: blit_x = 1 << (width - 1)    */
                            /*         blit_y = 1 << (height - 1)   */
                            /* if 0, will be set to 0xffffffff (all)*/
    /* access methods */
    void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
    void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
};

#ifdef CONFIG_FB_DEFERRED_IO
struct fb_deferred_io {
    /* delay between mkwrite and deferred handler */
    unsigned long delay;
    struct mutex lock; /* mutex that protects the page list */
    struct list_head pagelist; /* list of touched pages */
    /* callback */
    void (*first_io)(struct fb_info *info);
    void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
};
#endif

/*
 * Frame buffer operations
 *
 * LOCKING NOTE: those functions must _ALL_ be called with the console
 * semaphore held, this is the only suitable locking mechanism we have
 * in 2.6. Some may be called at interrupt time at this point though.
 *
 * The exception to this is the debug related hooks.  Putting the fb
 * into a debug state (e.g. flipping to the kernel console) and restoring
 * it must be done in a lock-free manner, so low level drivers should
 * keep track of the initial console (if applicable) and may need to
 * perform direct, unlocked hardware writes in these hooks.
 */

struct fb_ops {
    /* open/release and usage marking */
    struct module *owner;
    int (*fb_open)(struct fb_info *info, int user);
    int (*fb_release)(struct fb_info *info, int user);

    /* For framebuffers with strange non linear layouts or that do not
     * work with normal memory mapped access
     */
    ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
               size_t count, loff_t *ppos);
    ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
                size_t count, loff_t *ppos);

    /* checks var and eventually tweaks it to something supported,
     * DO NOT MODIFY PAR */
    int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);

    /* set the video mode according to info->var */
    int (*fb_set_par)(struct fb_info *info);

    /* set color register */
    int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
                unsigned blue, unsigned transp, struct fb_info *info);

    /* set color registers in batch */
    int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);

    /* blank display */
    int (*fb_blank)(int blank, struct fb_info *info);

    /* pan display */
    int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);

    /* Draws a rectangle */
    void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
    /* Copy data from area to another */
    void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
    /* Draws a image to the display */
    void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);

    /* Draws cursor */
    int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);

    /* Rotates the display */
    void (*fb_rotate)(struct fb_info *info, int angle);

    /* wait for blit idle, optional */
    int (*fb_sync)(struct fb_info *info);

    /* perform fb specific ioctl (optional) */
    int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
            unsigned long arg);

    /* Handle 32bit compat ioctl (optional) */
    int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
            unsigned long arg);

    /* perform fb specific mmap */
    int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);

    /* get capability given var */
    void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
                struct fb_var_screeninfo *var);

    /* teardown any resources to do with this framebuffer */
    void (*fb_destroy)(struct fb_info *info);

    /* called at KDB enter and leave time to prepare the console */
    int (*fb_debug_enter)(struct fb_info *info);
    int (*fb_debug_leave)(struct fb_info *info);
};

#ifdef CONFIG_FB_TILEBLITTING
#define FB_TILE_CURSOR_NONE        0
#define FB_TILE_CURSOR_UNDERLINE   1
#define FB_TILE_CURSOR_LOWER_THIRD 2
#define FB_TILE_CURSOR_LOWER_HALF  3
#define FB_TILE_CURSOR_TWO_THIRDS  4
#define FB_TILE_CURSOR_BLOCK       5

struct fb_tilemap {
    __u32 width;                /* width of each tile in pixels */
    __u32 height;               /* height of each tile in scanlines */
    __u32 depth;                /* color depth of each tile */
    __u32 length;               /* number of tiles in the map */
    const __u8 *data;           /* actual tile map: a bitmap array, packed
                       to the nearest byte */
};

struct fb_tilerect {
    __u32 sx;                   /* origin in the x-axis */
    __u32 sy;                   /* origin in the y-axis */
    __u32 width;                /* number of tiles in the x-axis */
    __u32 height;               /* number of tiles in the y-axis */
    __u32 index;                /* what tile to use: index to tile map */
    __u32 fg;                   /* foreground color */
    __u32 bg;                   /* background color */
    __u32 rop;                  /* raster operation */
};

struct fb_tilearea {
    __u32 sx;                   /* source origin in the x-axis */
    __u32 sy;                   /* source origin in the y-axis */
    __u32 dx;                   /* destination origin in the x-axis */
    __u32 dy;                   /* destination origin in the y-axis */
    __u32 width;                /* number of tiles in the x-axis */
    __u32 height;               /* number of tiles in the y-axis */
};

struct fb_tileblit {
    __u32 sx;                   /* origin in the x-axis */
    __u32 sy;                   /* origin in the y-axis */
    __u32 width;                /* number of tiles in the x-axis */
    __u32 height;               /* number of tiles in the y-axis */
    __u32 fg;                   /* foreground color */
    __u32 bg;                   /* background color */
    __u32 length;               /* number of tiles to draw */
    __u32 *indices;             /* array of indices to tile map */
};

struct fb_tilecursor {
    __u32 sx;                   /* cursor position in the x-axis */
    __u32 sy;                   /* cursor position in the y-axis */
    __u32 mode;                 /* 0 = erase, 1 = draw */
    __u32 shape;                /* see FB_TILE_CURSOR_* */
    __u32 fg;                   /* foreground color */
    __u32 bg;                   /* background color */
};

struct fb_tile_ops {
    /* set tile characteristics */
    void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);

    /* all dimensions from hereon are in terms of tiles */

    /* move a rectangular region of tiles from one area to another*/
    void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
    /* fill a rectangular region with a tile */
    void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
    /* copy an array of tiles */
    void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
    /* cursor */
    void (*fb_tilecursor)(struct fb_info *info,
                  struct fb_tilecursor *cursor);
    /* get maximum length of the tile map */
    int (*fb_get_tilemax)(struct fb_info *info);
};
#endif /* CONFIG_FB_TILEBLITTING */

/* FBINFO_* = fb_info.flags bit flags */
#define FBINFO_MODULE       0x0001  /* Low-level driver is a module */
#define FBINFO_HWACCEL_DISABLED 0x0002
    /* When FBINFO_HWACCEL_DISABLED is set:
     *  Hardware acceleration is turned off.  Software implementations
     *  of required functions (copyarea(), fillrect(), and imageblit())
     *  takes over; acceleration engine should be in a quiescent state */

/* hints */
#define FBINFO_VIRTFB       0x0004 /* FB is System RAM, not device. */
#define FBINFO_PARTIAL_PAN_OK   0x0040 /* otw use pan only for double-buffering */
#define FBINFO_READS_FAST   0x0080 /* soft-copy faster than rendering */

/* hardware supported ops */
/*  semantics: when a bit is set, it indicates that the operation is
 *   accelerated by hardware.
 *  required functions will still work even if the bit is not set.
 *  optional functions may not even exist if the flag bit is not set.
 */
#define FBINFO_HWACCEL_NONE     0x0000
#define FBINFO_HWACCEL_COPYAREA     0x0100 /* required */
#define FBINFO_HWACCEL_FILLRECT     0x0200 /* required */
#define FBINFO_HWACCEL_IMAGEBLIT    0x0400 /* required */
#define FBINFO_HWACCEL_ROTATE       0x0800 /* optional */
#define FBINFO_HWACCEL_XPAN     0x1000 /* optional */
#define FBINFO_HWACCEL_YPAN     0x2000 /* optional */
#define FBINFO_HWACCEL_YWRAP        0x4000 /* optional */

#define FBINFO_MISC_USEREVENT          0x10000 /* event request
                          from userspace */
#define FBINFO_MISC_TILEBLITTING       0x20000 /* use tile blitting */

/* A driver may set this flag to indicate that it does want a set_par to be
 * called every time when fbcon_switch is executed. The advantage is that with
 * this flag set you can really be sure that set_par is always called before
 * any of the functions dependent on the correct hardware state or altering
 * that state, even if you are using some broken X releases. The disadvantage
 * is that it introduces unwanted delays to every console switch if set_par
 * is slow. It is a good idea to try this flag in the drivers initialization
 * code whenever there is a bug report related to switching between X and the
 * framebuffer console.
 */
#define FBINFO_MISC_ALWAYS_SETPAR   0x40000

/* where the fb is a firmware driver, and can be replaced with a proper one */
#define FBINFO_MISC_FIRMWARE        0x80000
/*
 * Host and GPU endianness differ.
 */
#define FBINFO_FOREIGN_ENDIAN   0x100000
/*
 * Big endian math. This is the same flags as above, but with different
 * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
 * and host endianness. Drivers should not use this flag.
 */
#define FBINFO_BE_MATH  0x100000

/* report to the VT layer that this fb driver can accept forced console
   output like oopses */
#define FBINFO_CAN_FORCE_OUTPUT     0x200000

struct fb_info {
    atomic_t count;
    int node;
    int flags;
    struct mutex lock;      /* Lock for open/release/ioctl funcs */
    struct mutex mm_lock;       /* Lock for fb_mmap and smem_* fields */
    struct fb_var_screeninfo var;   /* Current var */
    struct fb_fix_screeninfo fix;   /* Current fix */
    struct fb_monspecs monspecs;    /* Current Monitor specs */
    struct work_struct queue;   /* Framebuffer event queue */
    struct fb_pixmap pixmap;    /* Image hardware mapper */
    struct fb_pixmap sprite;    /* Cursor hardware mapper */
    struct fb_cmap cmap;        /* Current cmap */
    struct list_head modelist;      /* mode list */
    struct fb_videomode *mode;  /* current mode */

#ifdef CONFIG_FB_BACKLIGHT
    /* assigned backlight device */
    /* set before framebuffer registration, 
       remove after unregister */
    struct backlight_device *bl_dev;

    /* Backlight level curve */
    struct mutex bl_curve_mutex;    
    u8 bl_curve[FB_BACKLIGHT_LEVELS];
#endif
#ifdef CONFIG_FB_DEFERRED_IO
    struct delayed_work deferred_work;
    struct fb_deferred_io *fbdefio;
#endif

    struct fb_ops *fbops;
    struct device *device;      /* This is the parent */
    struct device *dev;     /* This is this fb device */
    int class_flag;                    /* private sysfs flags */
#ifdef CONFIG_FB_TILEBLITTING
    struct fb_tile_ops *tileops;    /* Tile Blitting */
#endif
    char __iomem *screen_base;  /* Virtual address */
    unsigned long screen_size;  /* Amount of ioremapped VRAM or 0 */ 
    void *pseudo_palette;       /* Fake palette of 16 colors */ 
#define FBINFO_STATE_RUNNING    0
#define FBINFO_STATE_SUSPENDED  1
    u32 state;          /* Hardware state i.e suspend */
    void *fbcon_par;                /* fbcon use-only private area */
    /* From here on everything is device dependent */
    void *par;
    /* we need the PCI or similar aperture base/size not
       smem_start/size as smem_start may just be an object
       allocated inside the aperture so may not actually overlap */
    struct apertures_struct {
        unsigned int count;
        struct aperture {
            resource_size_t base;
            resource_size_t size;
        } ranges[0];
    } *apertures;
};

static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
    struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
            + max_num * sizeof(struct aperture), GFP_KERNEL);
    if (!a)
        return NULL;
    a->count = max_num;
    return a;
}

#ifdef MODULE
#define FBINFO_DEFAULT  FBINFO_MODULE
#else
#define FBINFO_DEFAULT  0
#endif

// This will go away
#define FBINFO_FLAG_MODULE  FBINFO_MODULE
#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT

/* This will go away
 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
 * when it wants to turn the acceleration engine on.  This is
 * really a separate operation, and should be modified via sysfs.
 *  But for now, we leave it broken with the following define
 */
#define STUPID_ACCELF_TEXT_SHIT

// This will go away
#if defined(__sparc__)

/* We map all of our framebuffers such that big-endian accesses
 * are what we want, so the following is sufficient.
 */

// This will go away
#define fb_readb sbus_readb
#define fb_readw sbus_readw
#define fb_readl sbus_readl
#define fb_readq sbus_readq
#define fb_writeb sbus_writeb
#define fb_writew sbus_writew
#define fb_writel sbus_writel
#define fb_writeq sbus_writeq
#define fb_memset sbus_memset_io
#define fb_memcpy_fromfb sbus_memcpy_fromio
#define fb_memcpy_tofb sbus_memcpy_toio

#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || defined(__avr32__) || defined(__bfin__)

#define fb_readb __raw_readb
#define fb_readw __raw_readw
#define fb_readl __raw_readl
#define fb_readq __raw_readq
#define fb_writeb __raw_writeb
#define fb_writew __raw_writew
#define fb_writel __raw_writel
#define fb_writeq __raw_writeq
#define fb_memset memset_io
#define fb_memcpy_fromfb memcpy_fromio
#define fb_memcpy_tofb memcpy_toio

#else

#define fb_readb(addr) (*(volatile u8 *) (addr))
#define fb_readw(addr) (*(volatile u16 *) (addr))
#define fb_readl(addr) (*(volatile u32 *) (addr))
#define fb_readq(addr) (*(volatile u64 *) (addr))
#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
#define fb_memset memset
#define fb_memcpy_fromfb memcpy
#define fb_memcpy_tofb memcpy

#endif

#define FB_LEFT_POS(p, bpp)          (fb_be_math(p) ? (32 - (bpp)) : 0)
#define FB_SHIFT_HIGH(p, val, bits)  (fb_be_math(p) ? (val) >> (bits) : \
                              (val) << (bits))
#define FB_SHIFT_LOW(p, val, bits)   (fb_be_math(p) ? (val) << (bits) : \
                              (val) >> (bits))

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

extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 
extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 
extern int fb_blank(struct fb_info *info, int blank);
extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 
extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 
extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
/*
 * Drawing operations where framebuffer is in system RAM
 */
extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
               size_t count, loff_t *ppos);
extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
                size_t count, loff_t *ppos);

/* drivers/video/fbmem.c */
extern int register_framebuffer(struct fb_info *fb_info);
extern int unregister_framebuffer(struct fb_info *fb_info);
extern int unlink_framebuffer(struct fb_info *fb_info);
extern void remove_conflicting_framebuffers(struct apertures_struct *a,
                const char *name, bool primary);
extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
extern int fb_show_logo(struct fb_info *fb_info, int rotate);
extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
                u32 height, u32 shift_high, u32 shift_low, u32 mod);
extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
extern void fb_set_suspend(struct fb_info *info, int state);
extern int fb_get_color_depth(struct fb_var_screeninfo *var,
                  struct fb_fix_screeninfo *fix);
extern int fb_get_options(char *name, char **option);
extern int fb_new_modelist(struct fb_info *info);

extern struct fb_info *registered_fb[FB_MAX];
extern int num_registered_fb;
extern struct class *fb_class;

extern int lock_fb_info(struct fb_info *info);

static inline void unlock_fb_info(struct fb_info *info)
{
    mutex_unlock(&info->lock);
}

static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
                       u8 *src, u32 s_pitch, u32 height)
{
    int i, j;

    d_pitch -= s_pitch;

    for (i = height; i--; ) {
        /* s_pitch is a few bytes at the most, memcpy is suboptimal */
        for (j = 0; j < s_pitch; j++)
            *dst++ = *src++;
        dst += d_pitch;
    }
}

/* drivers/video/fb_defio.c */
extern void fb_deferred_io_init(struct fb_info *info);
extern void fb_deferred_io_open(struct fb_info *info,
                struct inode *inode,
                struct file *file);
extern void fb_deferred_io_cleanup(struct fb_info *info);
extern int fb_deferred_io_fsync(struct file *file, loff_t start,
                loff_t end, int datasync);

static inline bool fb_be_math(struct fb_info *info)
{
#ifdef CONFIG_FB_FOREIGN_ENDIAN
#if defined(CONFIG_FB_BOTH_ENDIAN)
    return info->flags & FBINFO_BE_MATH;
#elif defined(CONFIG_FB_BIG_ENDIAN)
    return true;
#elif defined(CONFIG_FB_LITTLE_ENDIAN)
    return false;
#endif /* CONFIG_FB_BOTH_ENDIAN */
#else
#ifdef __BIG_ENDIAN
    return true;
#else
    return false;
#endif /* __BIG_ENDIAN */
#endif /* CONFIG_FB_FOREIGN_ENDIAN */
}

/* drivers/video/fbsysfs.c */
extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
extern void framebuffer_release(struct fb_info *info);
extern int fb_init_device(struct fb_info *fb_info);
extern void fb_cleanup_device(struct fb_info *head);
extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);

/* drivers/video/fbmon.c */
#define FB_MAXTIMINGS       0
#define FB_VSYNCTIMINGS     1
#define FB_HSYNCTIMINGS     2
#define FB_DCLKTIMINGS      3
#define FB_IGNOREMON        0x100

#define FB_MODE_IS_UNKNOWN  0
#define FB_MODE_IS_DETAILED 1
#define FB_MODE_IS_STANDARD 2
#define FB_MODE_IS_VESA     4
#define FB_MODE_IS_CALCULATED   8
#define FB_MODE_IS_FIRST    16
#define FB_MODE_IS_FROM_VAR     32

extern int fbmon_dpms(const struct fb_info *fb_info);
extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
               struct fb_info *info);
extern int fb_validate_mode(const struct fb_var_screeninfo *var,
                struct fb_info *info);
extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
extern const unsigned char *fb_firmware_edid(struct device *device);
extern void fb_edid_to_monspecs(unsigned char *edid,
                struct fb_monspecs *specs);
extern void fb_edid_add_monspecs(unsigned char *edid,
                 struct fb_monspecs *specs);
extern void fb_destroy_modedb(struct fb_videomode *modedb);
extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);

/* drivers/video/modedb.c */
#define VESA_MODEDB_SIZE 34
extern void fb_var_to_videomode(struct fb_videomode *mode,
                const struct fb_var_screeninfo *var);
extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
                const struct fb_videomode *mode);
extern int fb_mode_is_equal(const struct fb_videomode *mode1,
                const struct fb_videomode *mode2);
extern int fb_add_videomode(const struct fb_videomode *mode,
                struct list_head *head);
extern void fb_delete_videomode(const struct fb_videomode *mode,
                struct list_head *head);
extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
                        struct list_head *head);
extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
                            struct list_head *head);
extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
                               struct list_head *head);
extern void fb_destroy_modelist(struct list_head *head);
extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
                     struct list_head *head);
extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
                               struct list_head *head);

/* drivers/video/fbcmap.c */
extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
extern void fb_dealloc_cmap(struct fb_cmap *cmap);
extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
extern const struct fb_cmap *fb_default_cmap(int len);
extern void fb_invert_cmaps(void);

struct fb_videomode {
    const char *name;   /* optional */
    u32 refresh;        /* optional */
    u32 xres;
    u32 yres;
    u32 pixclock;
    u32 left_margin;
    u32 right_margin;
    u32 upper_margin;
    u32 lower_margin;
    u32 hsync_len;
    u32 vsync_len;
    u32 sync;
    u32 vmode;
    u32 flag;
};

extern const char *fb_mode_option;
extern const struct fb_videomode vesa_modes[];
extern const struct fb_videomode cea_modes[64];

struct fb_modelist {
    struct list_head list;
    struct fb_videomode mode;
};

extern int fb_find_mode(struct fb_var_screeninfo *var,
            struct fb_info *info, const char *mode_option,
            const struct fb_videomode *db,
            unsigned int dbsize,
            const struct fb_videomode *default_mode,
            unsigned int default_bpp);

#endif /* _LINUX_FB_H */