root/include/linux/fb.h

INCLUDED FROM

DEFINITIONS

1. alloc_apertures
2. unlock_fb_info
3. __fb_pad_aligned_buffer
4. fb_be_math

#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;
struct videomode;
struct device_node;

/* 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 */
#define FB_MISC_HDMI            4
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;

        bool skip_vt_switch; /* no VT switch on suspend/resume required */
};

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__) || defined(__arm__)

#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 int 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(const 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)
{
        u32 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);

extern int of_get_fb_videomode(struct device_node *np,
                               struct fb_videomode *fb,
                               int index);
extern int fb_videomode_from_videomode(const struct videomode *vm,
                                       struct fb_videomode *fbmode);

/* 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);

/* Convenience logging macros */
#define fb_err(fb_info, fmt, ...)                                       \
        pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
#define fb_notice(info, fmt, ...)                                       \
        pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
#define fb_warn(fb_info, fmt, ...)                                      \
        pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
#define fb_info(fb_info, fmt, ...)                                      \
        pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
#define fb_dbg(fb_info, fmt, ...)                                       \
        pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)

#endif /* _LINUX_FB_H */