#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 */
  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__)
  
  #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)
  {
  	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);
  
  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 */