include/linux/fb.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_FB_H
   3 #define _LINUX_FB_H
   4
   5 #include <linux/kgdb.h>
   6 #include <uapi/linux/fb.h>
   7
   8 #define FBIO_CURSOR            _IOWR('F', 0x08, struct fb_cursor_user)
   9
  10 #include <linux/fs.h>
  11 #include <linux/init.h>
  12 #include <linux/workqueue.h>
  13 #include <linux/notifier.h>
  14 #include <linux/list.h>
  15 #include <linux/backlight.h>
  16 #include <linux/slab.h>
  17 #include <asm/io.h>
  18
  19 struct vm_area_struct;
  20 struct fb_info;
  21 struct device;
  22 struct file;
  23 struct videomode;
  24 struct device_node;
  25
  26 /* Definitions below are used in the parsed monitor specs */
  27 #define FB_DPMS_ACTIVE_OFF      1
  28 #define FB_DPMS_SUSPEND         2
  29 #define FB_DPMS_STANDBY         4
  30
  31 #define FB_DISP_DDI             1
  32 #define FB_DISP_ANA_700_300     2
  33 #define FB_DISP_ANA_714_286     4
  34 #define FB_DISP_ANA_1000_400    8
  35 #define FB_DISP_ANA_700_000     16
  36
  37 #define FB_DISP_MONO            32
  38 #define FB_DISP_RGB             64
  39 #define FB_DISP_MULTI           128
  40 #define FB_DISP_UNKNOWN         256
  41
  42 #define FB_SIGNAL_NONE          0
  43 #define FB_SIGNAL_BLANK_BLANK   1
  44 #define FB_SIGNAL_SEPARATE      2
  45 #define FB_SIGNAL_COMPOSITE     4
  46 #define FB_SIGNAL_SYNC_ON_GREEN 8
  47 #define FB_SIGNAL_SERRATION_ON  16
  48
  49 #define FB_MISC_PRIM_COLOR      1
  50 #define FB_MISC_1ST_DETAIL      2       /* First Detailed Timing is preferred */
  51 #define FB_MISC_HDMI            4
  52 struct fb_chroma {
  53         __u32 redx;     /* in fraction of 1024 */
  54         __u32 greenx;
  55         __u32 bluex;
  56         __u32 whitex;
  57         __u32 redy;
  58         __u32 greeny;
  59         __u32 bluey;
  60         __u32 whitey;
  61 };
  62
  63 struct fb_monspecs {
  64         struct fb_chroma chroma;
  65         struct fb_videomode *modedb;    /* mode database */
  66         __u8  manufacturer[4];          /* Manufacturer */
  67         __u8  monitor[14];              /* Monitor String */
  68         __u8  serial_no[14];            /* Serial Number */
  69         __u8  ascii[14];                /* ? */
  70         __u32 modedb_len;               /* mode database length */
  71         __u32 model;                    /* Monitor Model */
  72         __u32 serial;                   /* Serial Number - Integer */
  73         __u32 year;                     /* Year manufactured */
  74         __u32 week;                     /* Week Manufactured */
  75         __u32 hfmin;                    /* hfreq lower limit (Hz) */
  76         __u32 hfmax;                    /* hfreq upper limit (Hz) */
  77         __u32 dclkmin;                  /* pixelclock lower limit (Hz) */
  78         __u32 dclkmax;                  /* pixelclock upper limit (Hz) */
  79         __u16 input;                    /* display type - see FB_DISP_* */
  80         __u16 dpms;                     /* DPMS support - see FB_DPMS_ */
  81         __u16 signal;                   /* Signal Type - see FB_SIGNAL_* */
  82         __u16 vfmin;                    /* vfreq lower limit (Hz) */
  83         __u16 vfmax;                    /* vfreq upper limit (Hz) */
  84         __u16 gamma;                    /* Gamma - in fractions of 100 */
  85         __u16 gtf       : 1;            /* supports GTF */
  86         __u16 misc;                     /* Misc flags - see FB_MISC_* */
  87         __u8  version;                  /* EDID version... */
  88         __u8  revision;                 /* ...and revision */
  89         __u8  max_x;                    /* Maximum horizontal size (cm) */
  90         __u8  max_y;                    /* Maximum vertical size (cm) */
  91 };
  92
  93 struct fb_cmap_user {
  94         __u32 start;                    /* First entry  */
  95         __u32 len;                      /* Number of entries */
  96         __u16 __user *red;              /* Red values   */
  97         __u16 __user *green;
  98         __u16 __user *blue;
  99         __u16 __user *transp;           /* transparency, can be NULL */
 100 };
 101
 102 struct fb_image_user {
 103         __u32 dx;                       /* Where to place image */
 104         __u32 dy;
 105         __u32 width;                    /* Size of image */
 106         __u32 height;
 107         __u32 fg_color;                 /* Only used when a mono bitmap */
 108         __u32 bg_color;
 109         __u8  depth;                    /* Depth of the image */
 110         const char __user *data;        /* Pointer to image data */
 111         struct fb_cmap_user cmap;       /* color map info */
 112 };
 113
 114 struct fb_cursor_user {
 115         __u16 set;                      /* what to set */
 116         __u16 enable;                   /* cursor on/off */
 117         __u16 rop;                      /* bitop operation */
 118         const char __user *mask;        /* cursor mask bits */
 119         struct fbcurpos hot;            /* cursor hot spot */
 120         struct fb_image_user image;     /* Cursor image */
 121 };
 122
 123 /*
 124  * Register/unregister for framebuffer events
 125  */
 126
 127 /*      The resolution of the passed in fb_info about to change */
 128 #define FB_EVENT_MODE_CHANGE            0x01
 129
 130 #ifdef CONFIG_GUMSTIX_AM200EPD
 131 /* only used by mach-pxa/am200epd.c */
 132 #define FB_EVENT_FB_REGISTERED          0x05
 133 #define FB_EVENT_FB_UNREGISTERED        0x06
 134 #endif
 135
 136 /*      A display blank is requested       */
 137 #define FB_EVENT_BLANK                  0x09
 138
 139 struct fb_event {
 140         struct fb_info *info;
 141         void *data;
 142 };
 143
 144 struct fb_blit_caps {
 145         u32 x;
 146         u32 y;
 147         u32 len;
 148         u32 flags;
 149 };
 150
 151 #ifdef CONFIG_FB_NOTIFY
 152 extern int fb_register_client(struct notifier_block *nb);
 153 extern int fb_unregister_client(struct notifier_block *nb);
 154 extern int fb_notifier_call_chain(unsigned long val, void *v);
 155 #else
 156 static inline int fb_register_client(struct notifier_block *nb)
 157 {
 158         return 0;
 159 };
 160
 161 static inline int fb_unregister_client(struct notifier_block *nb)
 162 {
 163         return 0;
 164 };
 165
 166 static inline int fb_notifier_call_chain(unsigned long val, void *v)
 167 {
 168         return 0;
 169 };
 170 #endif
 171
 172 /*
 173  * Pixmap structure definition
 174  *
 175  * The purpose of this structure is to translate data
 176  * from the hardware independent format of fbdev to what
 177  * format the hardware needs.
 178  */
 179
 180 #define FB_PIXMAP_DEFAULT 1     /* used internally by fbcon */
 181 #define FB_PIXMAP_SYSTEM  2     /* memory is in system RAM  */
 182 #define FB_PIXMAP_IO      4     /* memory is iomapped       */
 183 #define FB_PIXMAP_SYNC    256   /* set if GPU can DMA       */
 184
 185 struct fb_pixmap {
 186         u8  *addr;              /* pointer to memory                    */
 187         u32 size;               /* size of buffer in bytes              */
 188         u32 offset;             /* current offset to buffer             */
 189         u32 buf_align;          /* byte alignment of each bitmap        */
 190         u32 scan_align;         /* alignment per scanline               */
 191         u32 access_align;       /* alignment per read/write (bits)      */
 192         u32 flags;              /* see FB_PIXMAP_*                      */
 193         u32 blit_x;             /* supported bit block dimensions (1-32)*/
 194         u32 blit_y;             /* Format: blit_x = 1 << (width - 1)    */
 195                                 /*         blit_y = 1 << (height - 1)   */
 196                                 /* if 0, will be set to 0xffffffff (all)*/
 197         /* access methods */
 198         void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
 199         void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
 200 };
 201
 202 #ifdef CONFIG_FB_DEFERRED_IO
 203 struct fb_deferred_io {
 204         /* delay between mkwrite and deferred handler */
 205         unsigned long delay;
 206         struct mutex lock; /* mutex that protects the page list */
 207         struct list_head pagelist; /* list of touched pages */
 208         /* callback */
 209         void (*first_io)(struct fb_info *info);
 210         void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
 211 };
 212 #endif
 213
 214 /*
 215  * Frame buffer operations
 216  *
 217  * LOCKING NOTE: those functions must _ALL_ be called with the console
 218  * semaphore held, this is the only suitable locking mechanism we have
 219  * in 2.6. Some may be called at interrupt time at this point though.
 220  *
 221  * The exception to this is the debug related hooks.  Putting the fb
 222  * into a debug state (e.g. flipping to the kernel console) and restoring
 223  * it must be done in a lock-free manner, so low level drivers should
 224  * keep track of the initial console (if applicable) and may need to
 225  * perform direct, unlocked hardware writes in these hooks.
 226  */
 227
 228 struct fb_ops {
 229         /* open/release and usage marking */
 230         struct module *owner;
 231         int (*fb_open)(struct fb_info *info, int user);
 232         int (*fb_release)(struct fb_info *info, int user);
 233
 234         /* For framebuffers with strange non linear layouts or that do not
 235          * work with normal memory mapped access
 236          */
 237         ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
 238                            size_t count, loff_t *ppos);
 239         ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
 240                             size_t count, loff_t *ppos);
 241
 242         /* checks var and eventually tweaks it to something supported,
 243          * DO NOT MODIFY PAR */
 244         int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
 245
 246         /* set the video mode according to info->var */
 247         int (*fb_set_par)(struct fb_info *info);
 248
 249         /* set color register */
 250         int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
 251                             unsigned blue, unsigned transp, struct fb_info *info);
 252
 253         /* set color registers in batch */
 254         int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
 255
 256         /* blank display */
 257         int (*fb_blank)(int blank, struct fb_info *info);
 258
 259         /* pan display */
 260         int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
 261
 262         /* Draws a rectangle */
 263         void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
 264         /* Copy data from area to another */
 265         void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
 266         /* Draws a image to the display */
 267         void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
 268
 269         /* Draws cursor */
 270         int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
 271
 272         /* wait for blit idle, optional */
 273         int (*fb_sync)(struct fb_info *info);
 274
 275         /* perform fb specific ioctl (optional) */
 276         int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
 277                         unsigned long arg);
 278
 279         /* Handle 32bit compat ioctl (optional) */
 280         int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
 281                         unsigned long arg);
 282
 283         /* perform fb specific mmap */
 284         int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
 285
 286         /* get capability given var */
 287         void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
 288                             struct fb_var_screeninfo *var);
 289
 290         /* teardown any resources to do with this framebuffer */
 291         void (*fb_destroy)(struct fb_info *info);
 292
 293         /* called at KDB enter and leave time to prepare the console */
 294         int (*fb_debug_enter)(struct fb_info *info);
 295         int (*fb_debug_leave)(struct fb_info *info);
 296 };
 297
 298 #ifdef CONFIG_FB_TILEBLITTING
 299 #define FB_TILE_CURSOR_NONE        0
 300 #define FB_TILE_CURSOR_UNDERLINE   1
 301 #define FB_TILE_CURSOR_LOWER_THIRD 2
 302 #define FB_TILE_CURSOR_LOWER_HALF  3
 303 #define FB_TILE_CURSOR_TWO_THIRDS  4
 304 #define FB_TILE_CURSOR_BLOCK       5
 305
 306 struct fb_tilemap {
 307         __u32 width;                /* width of each tile in pixels */
 308         __u32 height;               /* height of each tile in scanlines */
 309         __u32 depth;                /* color depth of each tile */
 310         __u32 length;               /* number of tiles in the map */
 311         const __u8 *data;           /* actual tile map: a bitmap array, packed
 312                                        to the nearest byte */
 313 };
 314
 315 struct fb_tilerect {
 316         __u32 sx;                   /* origin in the x-axis */
 317         __u32 sy;                   /* origin in the y-axis */
 318         __u32 width;                /* number of tiles in the x-axis */
 319         __u32 height;               /* number of tiles in the y-axis */
 320         __u32 index;                /* what tile to use: index to tile map */
 321         __u32 fg;                   /* foreground color */
 322         __u32 bg;                   /* background color */
 323         __u32 rop;                  /* raster operation */
 324 };
 325
 326 struct fb_tilearea {
 327         __u32 sx;                   /* source origin in the x-axis */
 328         __u32 sy;                   /* source origin in the y-axis */
 329         __u32 dx;                   /* destination origin in the x-axis */
 330         __u32 dy;                   /* destination origin in the y-axis */
 331         __u32 width;                /* number of tiles in the x-axis */
 332         __u32 height;               /* number of tiles in the y-axis */
 333 };
 334
 335 struct fb_tileblit {
 336         __u32 sx;                   /* origin in the x-axis */
 337         __u32 sy;                   /* origin in the y-axis */
 338         __u32 width;                /* number of tiles in the x-axis */
 339         __u32 height;               /* number of tiles in the y-axis */
 340         __u32 fg;                   /* foreground color */
 341         __u32 bg;                   /* background color */
 342         __u32 length;               /* number of tiles to draw */
 343         __u32 *indices;             /* array of indices to tile map */
 344 };
 345
 346 struct fb_tilecursor {
 347         __u32 sx;                   /* cursor position in the x-axis */
 348         __u32 sy;                   /* cursor position in the y-axis */
 349         __u32 mode;                 /* 0 = erase, 1 = draw */
 350         __u32 shape;                /* see FB_TILE_CURSOR_* */
 351         __u32 fg;                   /* foreground color */
 352         __u32 bg;                   /* background color */
 353 };
 354
 355 struct fb_tile_ops {
 356         /* set tile characteristics */
 357         void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
 358
 359         /* all dimensions from hereon are in terms of tiles */
 360
 361         /* move a rectangular region of tiles from one area to another*/
 362         void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
 363         /* fill a rectangular region with a tile */
 364         void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
 365         /* copy an array of tiles */
 366         void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
 367         /* cursor */
 368         void (*fb_tilecursor)(struct fb_info *info,
 369                               struct fb_tilecursor *cursor);
 370         /* get maximum length of the tile map */
 371         int (*fb_get_tilemax)(struct fb_info *info);
 372 };
 373 #endif /* CONFIG_FB_TILEBLITTING */
 374
 375 /* FBINFO_* = fb_info.flags bit flags */
 376 #define FBINFO_DEFAULT          0
 377 #define FBINFO_HWACCEL_DISABLED 0x0002
 378         /* When FBINFO_HWACCEL_DISABLED is set:
 379          *  Hardware acceleration is turned off.  Software implementations
 380          *  of required functions (copyarea(), fillrect(), and imageblit())
 381          *  takes over; acceleration engine should be in a quiescent state */
 382
 383 /* hints */
 384 #define FBINFO_VIRTFB           0x0004 /* FB is System RAM, not device. */
 385 #define FBINFO_PARTIAL_PAN_OK   0x0040 /* otw use pan only for double-buffering */
 386 #define FBINFO_READS_FAST       0x0080 /* soft-copy faster than rendering */
 387
 388 /* hardware supported ops */
 389 /*  semantics: when a bit is set, it indicates that the operation is
 390  *   accelerated by hardware.
 391  *  required functions will still work even if the bit is not set.
 392  *  optional functions may not even exist if the flag bit is not set.
 393  */
 394 #define FBINFO_HWACCEL_NONE             0x0000
 395 #define FBINFO_HWACCEL_COPYAREA         0x0100 /* required */
 396 #define FBINFO_HWACCEL_FILLRECT         0x0200 /* required */
 397 #define FBINFO_HWACCEL_IMAGEBLIT        0x0400 /* required */
 398 #define FBINFO_HWACCEL_ROTATE           0x0800 /* optional */
 399 #define FBINFO_HWACCEL_XPAN             0x1000 /* optional */
 400 #define FBINFO_HWACCEL_YPAN             0x2000 /* optional */
 401 #define FBINFO_HWACCEL_YWRAP            0x4000 /* optional */
 402
 403 #define FBINFO_MISC_USEREVENT          0x10000 /* event request
 404                                                   from userspace */
 405 #define FBINFO_MISC_TILEBLITTING       0x20000 /* use tile blitting */
 406
 407 /* A driver may set this flag to indicate that it does want a set_par to be
 408  * called every time when fbcon_switch is executed. The advantage is that with
 409  * this flag set you can really be sure that set_par is always called before
 410  * any of the functions dependent on the correct hardware state or altering
 411  * that state, even if you are using some broken X releases. The disadvantage
 412  * is that it introduces unwanted delays to every console switch if set_par
 413  * is slow. It is a good idea to try this flag in the drivers initialization
 414  * code whenever there is a bug report related to switching between X and the
 415  * framebuffer console.
 416  */
 417 #define FBINFO_MISC_ALWAYS_SETPAR   0x40000
 418
 419 /* where the fb is a firmware driver, and can be replaced with a proper one */
 420 #define FBINFO_MISC_FIRMWARE        0x80000
 421 /*
 422  * Host and GPU endianness differ.
 423  */
 424 #define FBINFO_FOREIGN_ENDIAN   0x100000
 425 /*
 426  * Big endian math. This is the same flags as above, but with different
 427  * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
 428  * and host endianness. Drivers should not use this flag.
 429  */
 430 #define FBINFO_BE_MATH  0x100000
 431 /*
 432  * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
 433  * drivers to stop userspace from trying to share buffers behind the kernel's
 434  * back. Instead dma-buf based buffer sharing should be used.
 435  */
 436 #define FBINFO_HIDE_SMEM_START  0x200000
 437
 438
 439 struct fb_info {
 440         atomic_t count;
 441         int node;
 442         int flags;
 443         /*
 444          * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
 445          * a lcd is not mounted upright and fbcon should rotate to compensate.
 446          */
 447         int fbcon_rotate_hint;
 448         struct mutex lock;              /* Lock for open/release/ioctl funcs */
 449         struct mutex mm_lock;           /* Lock for fb_mmap and smem_* fields */
 450         struct fb_var_screeninfo var;   /* Current var */
 451         struct fb_fix_screeninfo fix;   /* Current fix */
 452         struct fb_monspecs monspecs;    /* Current Monitor specs */
 453         struct work_struct queue;       /* Framebuffer event queue */
 454         struct fb_pixmap pixmap;        /* Image hardware mapper */
 455         struct fb_pixmap sprite;        /* Cursor hardware mapper */
 456         struct fb_cmap cmap;            /* Current cmap */
 457         struct list_head modelist;      /* mode list */
 458         struct fb_videomode *mode;      /* current mode */
 459
 460 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
 461         /* assigned backlight device */
 462         /* set before framebuffer registration,
 463            remove after unregister */
 464         struct backlight_device *bl_dev;
 465
 466         /* Backlight level curve */
 467         struct mutex bl_curve_mutex;
 468         u8 bl_curve[FB_BACKLIGHT_LEVELS];
 469 #endif
 470 #ifdef CONFIG_FB_DEFERRED_IO
 471         struct delayed_work deferred_work;
 472         struct fb_deferred_io *fbdefio;
 473 #endif
 474
 475         struct fb_ops *fbops;
 476         struct device *device;          /* This is the parent */
 477         struct device *dev;             /* This is this fb device */
 478         int class_flag;                    /* private sysfs flags */
 479 #ifdef CONFIG_FB_TILEBLITTING
 480         struct fb_tile_ops *tileops;    /* Tile Blitting */
 481 #endif
 482         union {
 483                 char __iomem *screen_base;      /* Virtual address */
 484                 char *screen_buffer;
 485         };
 486         unsigned long screen_size;      /* Amount of ioremapped VRAM or 0 */
 487         void *pseudo_palette;           /* Fake palette of 16 colors */
 488 #define FBINFO_STATE_RUNNING    0
 489 #define FBINFO_STATE_SUSPENDED  1
 490         u32 state;                      /* Hardware state i.e suspend */
 491         void *fbcon_par;                /* fbcon use-only private area */
 492         /* From here on everything is device dependent */
 493         void *par;
 494         /* we need the PCI or similar aperture base/size not
 495            smem_start/size as smem_start may just be an object
 496            allocated inside the aperture so may not actually overlap */
 497         struct apertures_struct {
 498                 unsigned int count;
 499                 struct aperture {
 500                         resource_size_t base;
 501                         resource_size_t size;
 502                 } ranges[0];
 503         } *apertures;
 504
 505         bool skip_vt_switch; /* no VT switch on suspend/resume required */
 506 };
 507
 508 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
 509         struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
 510                         + max_num * sizeof(struct aperture), GFP_KERNEL);
 511         if (!a)
 512                 return NULL;
 513         a->count = max_num;
 514         return a;
 515 }
 516
 517 #define FBINFO_FLAG_DEFAULT     FBINFO_DEFAULT
 518
 519 /* This will go away
 520  * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
 521  * when it wants to turn the acceleration engine on.  This is
 522  * really a separate operation, and should be modified via sysfs.
 523  *  But for now, we leave it broken with the following define
 524  */
 525 #define STUPID_ACCELF_TEXT_SHIT
 526
 527 // This will go away
 528 #if defined(__sparc__)
 529
 530 /* We map all of our framebuffers such that big-endian accesses
 531  * are what we want, so the following is sufficient.
 532  */
 533
 534 // This will go away
 535 #define fb_readb sbus_readb
 536 #define fb_readw sbus_readw
 537 #define fb_readl sbus_readl
 538 #define fb_readq sbus_readq
 539 #define fb_writeb sbus_writeb
 540 #define fb_writew sbus_writew
 541 #define fb_writel sbus_writel
 542 #define fb_writeq sbus_writeq
 543 #define fb_memset sbus_memset_io
 544 #define fb_memcpy_fromfb sbus_memcpy_fromio
 545 #define fb_memcpy_tofb sbus_memcpy_toio
 546
 547 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
 548         defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
 549         defined(__arm__) || defined(__aarch64__)
 550
 551 #define fb_readb __raw_readb
 552 #define fb_readw __raw_readw
 553 #define fb_readl __raw_readl
 554 #define fb_readq __raw_readq
 555 #define fb_writeb __raw_writeb
 556 #define fb_writew __raw_writew
 557 #define fb_writel __raw_writel
 558 #define fb_writeq __raw_writeq
 559 #define fb_memset memset_io
 560 #define fb_memcpy_fromfb memcpy_fromio
 561 #define fb_memcpy_tofb memcpy_toio
 562
 563 #else
 564
 565 #define fb_readb(addr) (*(volatile u8 *) (addr))
 566 #define fb_readw(addr) (*(volatile u16 *) (addr))
 567 #define fb_readl(addr) (*(volatile u32 *) (addr))
 568 #define fb_readq(addr) (*(volatile u64 *) (addr))
 569 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
 570 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
 571 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
 572 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
 573 #define fb_memset memset
 574 #define fb_memcpy_fromfb memcpy
 575 #define fb_memcpy_tofb memcpy
 576
 577 #endif
 578
 579 #define FB_LEFT_POS(p, bpp)          (fb_be_math(p) ? (32 - (bpp)) : 0)
 580 #define FB_SHIFT_HIGH(p, val, bits)  (fb_be_math(p) ? (val) >> (bits) : \
 581                                                       (val) << (bits))
 582 #define FB_SHIFT_LOW(p, val, bits)   (fb_be_math(p) ? (val) << (bits) : \
 583                                                       (val) >> (bits))
 584
 585     /*
 586      *  `Generic' versions of the frame buffer device operations
 587      */
 588
 589 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
 590 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
 591 extern int fb_blank(struct fb_info *info, int blank);
 592 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 593 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 594 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
 595 /*
 596  * Drawing operations where framebuffer is in system RAM
 597  */
 598 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 599 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 600 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
 601 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
 602                            size_t count, loff_t *ppos);
 603 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 604                             size_t count, loff_t *ppos);
 605
 606 /* drivers/video/fbmem.c */
 607 extern int register_framebuffer(struct fb_info *fb_info);
 608 extern void unregister_framebuffer(struct fb_info *fb_info);
 609 extern void unlink_framebuffer(struct fb_info *fb_info);
 610 extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev,
 611                                                const char *name);
 612 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
 613                                            const char *name, bool primary);
 614 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 615 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 616 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
 617 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 618                                 u32 height, u32 shift_high, u32 shift_low, u32 mod);
 619 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
 620 extern void fb_set_suspend(struct fb_info *info, int state);
 621 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
 622                               struct fb_fix_screeninfo *fix);
 623 extern int fb_get_options(const char *name, char **option);
 624 extern int fb_new_modelist(struct fb_info *info);
 625
 626 extern struct fb_info *registered_fb[FB_MAX];
 627 extern int num_registered_fb;
 628 extern bool fb_center_logo;
 629 extern struct class *fb_class;
 630
 631 #define for_each_registered_fb(i)               \
 632         for (i = 0; i < FB_MAX; i++)            \
 633                 if (!registered_fb[i]) {} else
 634
 635 static inline void lock_fb_info(struct fb_info *info)
 636 {
 637         mutex_lock(&info->lock);
 638 }
 639
 640 static inline void unlock_fb_info(struct fb_info *info)
 641 {
 642         mutex_unlock(&info->lock);
 643 }
 644
 645 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
 646                                            u8 *src, u32 s_pitch, u32 height)
 647 {
 648         u32 i, j;
 649
 650         d_pitch -= s_pitch;
 651
 652         for (i = height; i--; ) {
 653                 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
 654                 for (j = 0; j < s_pitch; j++)
 655                         *dst++ = *src++;
 656                 dst += d_pitch;
 657         }
 658 }
 659
 660 /* drivers/video/fb_defio.c */
 661 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
 662 extern void fb_deferred_io_init(struct fb_info *info);
 663 extern void fb_deferred_io_open(struct fb_info *info,
 664                                 struct inode *inode,
 665                                 struct file *file);
 666 extern void fb_deferred_io_cleanup(struct fb_info *info);
 667 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
 668                                 loff_t end, int datasync);
 669
 670 static inline bool fb_be_math(struct fb_info *info)
 671 {
 672 #ifdef CONFIG_FB_FOREIGN_ENDIAN
 673 #if defined(CONFIG_FB_BOTH_ENDIAN)
 674         return info->flags & FBINFO_BE_MATH;
 675 #elif defined(CONFIG_FB_BIG_ENDIAN)
 676         return true;
 677 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
 678         return false;
 679 #endif /* CONFIG_FB_BOTH_ENDIAN */
 680 #else
 681 #ifdef __BIG_ENDIAN
 682         return true;
 683 #else
 684         return false;
 685 #endif /* __BIG_ENDIAN */
 686 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
 687 }
 688
 689 /* drivers/video/fbsysfs.c */
 690 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
 691 extern void framebuffer_release(struct fb_info *info);
 692 extern int fb_init_device(struct fb_info *fb_info);
 693 extern void fb_cleanup_device(struct fb_info *head);
 694 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
 695
 696 /* drivers/video/fbmon.c */
 697 #define FB_MAXTIMINGS           0
 698 #define FB_VSYNCTIMINGS         1
 699 #define FB_HSYNCTIMINGS         2
 700 #define FB_DCLKTIMINGS          3
 701 #define FB_IGNOREMON            0x100
 702
 703 #define FB_MODE_IS_UNKNOWN      0
 704 #define FB_MODE_IS_DETAILED     1
 705 #define FB_MODE_IS_STANDARD     2
 706 #define FB_MODE_IS_VESA         4
 707 #define FB_MODE_IS_CALCULATED   8
 708 #define FB_MODE_IS_FIRST        16
 709 #define FB_MODE_IS_FROM_VAR     32
 710
 711 extern int fbmon_dpms(const struct fb_info *fb_info);
 712 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
 713                        struct fb_info *info);
 714 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
 715                             struct fb_info *info);
 716 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
 717 extern const unsigned char *fb_firmware_edid(struct device *device);
 718 extern void fb_edid_to_monspecs(unsigned char *edid,
 719                                 struct fb_monspecs *specs);
 720 extern void fb_destroy_modedb(struct fb_videomode *modedb);
 721 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
 722 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
 723
 724 extern int of_get_fb_videomode(struct device_node *np,
 725                                struct fb_videomode *fb,
 726                                int index);
 727 extern int fb_videomode_from_videomode(const struct videomode *vm,
 728                                        struct fb_videomode *fbmode);
 729
 730 /* drivers/video/modedb.c */
 731 #define VESA_MODEDB_SIZE 43
 732 #define DMT_SIZE 0x50
 733
 734 extern void fb_var_to_videomode(struct fb_videomode *mode,
 735                                 const struct fb_var_screeninfo *var);
 736 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
 737                                 const struct fb_videomode *mode);
 738 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
 739                             const struct fb_videomode *mode2);
 740 extern int fb_add_videomode(const struct fb_videomode *mode,
 741                             struct list_head *head);
 742 extern void fb_delete_videomode(const struct fb_videomode *mode,
 743                                 struct list_head *head);
 744 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
 745                                                 struct list_head *head);
 746 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
 747                                                     struct list_head *head);
 748 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
 749                                                        struct list_head *head);
 750 extern void fb_destroy_modelist(struct list_head *head);
 751 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
 752                                      struct list_head *head);
 753 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
 754                                                        struct list_head *head);
 755
 756 /* drivers/video/fbcmap.c */
 757 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
 758 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
 759 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
 760 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
 761 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
 762 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
 763 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
 764 extern const struct fb_cmap *fb_default_cmap(int len);
 765 extern void fb_invert_cmaps(void);
 766
 767 struct fb_videomode {
 768         const char *name;       /* optional */
 769         u32 refresh;            /* optional */
 770         u32 xres;
 771         u32 yres;
 772         u32 pixclock;
 773         u32 left_margin;
 774         u32 right_margin;
 775         u32 upper_margin;
 776         u32 lower_margin;
 777         u32 hsync_len;
 778         u32 vsync_len;
 779         u32 sync;
 780         u32 vmode;
 781         u32 flag;
 782 };
 783
 784 struct dmt_videomode {
 785         u32 dmt_id;
 786         u32 std_2byte_code;
 787         u32 cvt_3byte_code;
 788         const struct fb_videomode *mode;
 789 };
 790
 791 extern const char *fb_mode_option;
 792 extern const struct fb_videomode vesa_modes[];
 793 extern const struct dmt_videomode dmt_modes[];
 794
 795 struct fb_modelist {
 796         struct list_head list;
 797         struct fb_videomode mode;
 798 };
 799
 800 extern int fb_find_mode(struct fb_var_screeninfo *var,
 801                         struct fb_info *info, const char *mode_option,
 802                         const struct fb_videomode *db,
 803                         unsigned int dbsize,
 804                         const struct fb_videomode *default_mode,
 805                         unsigned int default_bpp);
 806
 807 /* Convenience logging macros */
 808 #define fb_err(fb_info, fmt, ...)                                       \
 809         pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 810 #define fb_notice(info, fmt, ...)                                       \
 811         pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 812 #define fb_warn(fb_info, fmt, ...)                                      \
 813         pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 814 #define fb_info(fb_info, fmt, ...)                                      \
 815         pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 816 #define fb_dbg(fb_info, fmt, ...)                                       \
 817         pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 818
 819 #endif /* _LINUX_FB_H */