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 /*      The display on this fb_info is beeing suspended, no access to the
 130  *      framebuffer is allowed any more after that call returns
 131  */
 132 #define FB_EVENT_SUSPEND                0x02
 133 /*      The display on this fb_info was resumed, you can restore the display
 134  *      if you own it
 135  */
 136 #define FB_EVENT_RESUME                 0x03
 137 /*      An entry from the modelist was removed */
 138 #define FB_EVENT_MODE_DELETE            0x04
 139 /*      A driver registered itself */
 140 #define FB_EVENT_FB_REGISTERED          0x05
 141 /*      A driver unregistered itself */
 142 #define FB_EVENT_FB_UNREGISTERED        0x06
 143 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
 144 #define FB_EVENT_GET_CONSOLE_MAP        0x07
 145 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
 146 #define FB_EVENT_SET_CONSOLE_MAP        0x08
 147 /*      A hardware display blank change occurred */
 148 #define FB_EVENT_BLANK                  0x09
 149 /*      Private modelist is to be replaced */
 150 #define FB_EVENT_NEW_MODELIST           0x0A
 151 /*      The resolution of the passed in fb_info about to change and
 152         all vc's should be changed         */
 153 #define FB_EVENT_MODE_CHANGE_ALL        0x0B
 154 /*      A software display blank change occurred */
 155 #define FB_EVENT_CONBLANK               0x0C
 156 /*      Get drawing requirements        */
 157 #define FB_EVENT_GET_REQ                0x0D
 158 /*      Unbind from the console if possible */
 159 #define FB_EVENT_FB_UNBIND              0x0E
 160 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
 161 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
 162 /*      A hardware display blank early change occured */
 163 #define FB_EARLY_EVENT_BLANK            0x10
 164 /*      A hardware display blank revert early change occured */
 165 #define FB_R_EARLY_EVENT_BLANK          0x11
 166
 167 struct fb_event {
 168         struct fb_info *info;
 169         void *data;
 170 };
 171
 172 struct fb_blit_caps {
 173         u32 x;
 174         u32 y;
 175         u32 len;
 176         u32 flags;
 177 };
 178
 179 #ifdef CONFIG_FB_NOTIFY
 180 extern int fb_register_client(struct notifier_block *nb);
 181 extern int fb_unregister_client(struct notifier_block *nb);
 182 extern int fb_notifier_call_chain(unsigned long val, void *v);
 183 #else
 184 static inline int fb_register_client(struct notifier_block *nb)
 185 {
 186         return 0;
 187 };
 188
 189 static inline int fb_unregister_client(struct notifier_block *nb)
 190 {
 191         return 0;
 192 };
 193
 194 static inline int fb_notifier_call_chain(unsigned long val, void *v)
 195 {
 196         return 0;
 197 };
 198 #endif
 199
 200 /*
 201  * Pixmap structure definition
 202  *
 203  * The purpose of this structure is to translate data
 204  * from the hardware independent format of fbdev to what
 205  * format the hardware needs.
 206  */
 207
 208 #define FB_PIXMAP_DEFAULT 1     /* used internally by fbcon */
 209 #define FB_PIXMAP_SYSTEM  2     /* memory is in system RAM  */
 210 #define FB_PIXMAP_IO      4     /* memory is iomapped       */
 211 #define FB_PIXMAP_SYNC    256   /* set if GPU can DMA       */
 212
 213 struct fb_pixmap {
 214         u8  *addr;              /* pointer to memory                    */
 215         u32 size;               /* size of buffer in bytes              */
 216         u32 offset;             /* current offset to buffer             */
 217         u32 buf_align;          /* byte alignment of each bitmap        */
 218         u32 scan_align;         /* alignment per scanline               */
 219         u32 access_align;       /* alignment per read/write (bits)      */
 220         u32 flags;              /* see FB_PIXMAP_*                      */
 221         u32 blit_x;             /* supported bit block dimensions (1-32)*/
 222         u32 blit_y;             /* Format: blit_x = 1 << (width - 1)    */
 223                                 /*         blit_y = 1 << (height - 1)   */
 224                                 /* if 0, will be set to 0xffffffff (all)*/
 225         /* access methods */
 226         void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
 227         void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
 228 };
 229
 230 #ifdef CONFIG_FB_DEFERRED_IO
 231 struct fb_deferred_io {
 232         /* delay between mkwrite and deferred handler */
 233         unsigned long delay;
 234         struct mutex lock; /* mutex that protects the page list */
 235         struct list_head pagelist; /* list of touched pages */
 236         /* callback */
 237         void (*first_io)(struct fb_info *info);
 238         void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
 239 };
 240 #endif
 241
 242 /*
 243  * Frame buffer operations
 244  *
 245  * LOCKING NOTE: those functions must _ALL_ be called with the console
 246  * semaphore held, this is the only suitable locking mechanism we have
 247  * in 2.6. Some may be called at interrupt time at this point though.
 248  *
 249  * The exception to this is the debug related hooks.  Putting the fb
 250  * into a debug state (e.g. flipping to the kernel console) and restoring
 251  * it must be done in a lock-free manner, so low level drivers should
 252  * keep track of the initial console (if applicable) and may need to
 253  * perform direct, unlocked hardware writes in these hooks.
 254  */
 255
 256 struct fb_ops {
 257         /* open/release and usage marking */
 258         struct module *owner;
 259         int (*fb_open)(struct fb_info *info, int user);
 260         int (*fb_release)(struct fb_info *info, int user);
 261
 262         /* For framebuffers with strange non linear layouts or that do not
 263          * work with normal memory mapped access
 264          */
 265         ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
 266                            size_t count, loff_t *ppos);
 267         ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
 268                             size_t count, loff_t *ppos);
 269
 270         /* checks var and eventually tweaks it to something supported,
 271          * DO NOT MODIFY PAR */
 272         int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
 273
 274         /* set the video mode according to info->var */
 275         int (*fb_set_par)(struct fb_info *info);
 276
 277         /* set color register */
 278         int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
 279                             unsigned blue, unsigned transp, struct fb_info *info);
 280
 281         /* set color registers in batch */
 282         int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
 283
 284         /* blank display */
 285         int (*fb_blank)(int blank, struct fb_info *info);
 286
 287         /* pan display */
 288         int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
 289
 290         /* Draws a rectangle */
 291         void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
 292         /* Copy data from area to another */
 293         void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
 294         /* Draws a image to the display */
 295         void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
 296
 297         /* Draws cursor */
 298         int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
 299
 300         /* wait for blit idle, optional */
 301         int (*fb_sync)(struct fb_info *info);
 302
 303         /* perform fb specific ioctl (optional) */
 304         int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
 305                         unsigned long arg);
 306
 307         /* Handle 32bit compat ioctl (optional) */
 308         int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
 309                         unsigned long arg);
 310
 311         /* perform fb specific mmap */
 312         int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
 313
 314         /* get capability given var */
 315         void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
 316                             struct fb_var_screeninfo *var);
 317
 318         /* teardown any resources to do with this framebuffer */
 319         void (*fb_destroy)(struct fb_info *info);
 320
 321         /* called at KDB enter and leave time to prepare the console */
 322         int (*fb_debug_enter)(struct fb_info *info);
 323         int (*fb_debug_leave)(struct fb_info *info);
 324 };
 325
 326 #ifdef CONFIG_FB_TILEBLITTING
 327 #define FB_TILE_CURSOR_NONE        0
 328 #define FB_TILE_CURSOR_UNDERLINE   1
 329 #define FB_TILE_CURSOR_LOWER_THIRD 2
 330 #define FB_TILE_CURSOR_LOWER_HALF  3
 331 #define FB_TILE_CURSOR_TWO_THIRDS  4
 332 #define FB_TILE_CURSOR_BLOCK       5
 333
 334 struct fb_tilemap {
 335         __u32 width;                /* width of each tile in pixels */
 336         __u32 height;               /* height of each tile in scanlines */
 337         __u32 depth;                /* color depth of each tile */
 338         __u32 length;               /* number of tiles in the map */
 339         const __u8 *data;           /* actual tile map: a bitmap array, packed
 340                                        to the nearest byte */
 341 };
 342
 343 struct fb_tilerect {
 344         __u32 sx;                   /* origin in the x-axis */
 345         __u32 sy;                   /* origin in the y-axis */
 346         __u32 width;                /* number of tiles in the x-axis */
 347         __u32 height;               /* number of tiles in the y-axis */
 348         __u32 index;                /* what tile to use: index to tile map */
 349         __u32 fg;                   /* foreground color */
 350         __u32 bg;                   /* background color */
 351         __u32 rop;                  /* raster operation */
 352 };
 353
 354 struct fb_tilearea {
 355         __u32 sx;                   /* source origin in the x-axis */
 356         __u32 sy;                   /* source origin in the y-axis */
 357         __u32 dx;                   /* destination origin in the x-axis */
 358         __u32 dy;                   /* destination origin in the y-axis */
 359         __u32 width;                /* number of tiles in the x-axis */
 360         __u32 height;               /* number of tiles in the y-axis */
 361 };
 362
 363 struct fb_tileblit {
 364         __u32 sx;                   /* origin in the x-axis */
 365         __u32 sy;                   /* origin in the y-axis */
 366         __u32 width;                /* number of tiles in the x-axis */
 367         __u32 height;               /* number of tiles in the y-axis */
 368         __u32 fg;                   /* foreground color */
 369         __u32 bg;                   /* background color */
 370         __u32 length;               /* number of tiles to draw */
 371         __u32 *indices;             /* array of indices to tile map */
 372 };
 373
 374 struct fb_tilecursor {
 375         __u32 sx;                   /* cursor position in the x-axis */
 376         __u32 sy;                   /* cursor position in the y-axis */
 377         __u32 mode;                 /* 0 = erase, 1 = draw */
 378         __u32 shape;                /* see FB_TILE_CURSOR_* */
 379         __u32 fg;                   /* foreground color */
 380         __u32 bg;                   /* background color */
 381 };
 382
 383 struct fb_tile_ops {
 384         /* set tile characteristics */
 385         void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
 386
 387         /* all dimensions from hereon are in terms of tiles */
 388
 389         /* move a rectangular region of tiles from one area to another*/
 390         void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
 391         /* fill a rectangular region with a tile */
 392         void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
 393         /* copy an array of tiles */
 394         void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
 395         /* cursor */
 396         void (*fb_tilecursor)(struct fb_info *info,
 397                               struct fb_tilecursor *cursor);
 398         /* get maximum length of the tile map */
 399         int (*fb_get_tilemax)(struct fb_info *info);
 400 };
 401 #endif /* CONFIG_FB_TILEBLITTING */
 402
 403 /* FBINFO_* = fb_info.flags bit flags */
 404 #define FBINFO_DEFAULT          0
 405 #define FBINFO_HWACCEL_DISABLED 0x0002
 406         /* When FBINFO_HWACCEL_DISABLED is set:
 407          *  Hardware acceleration is turned off.  Software implementations
 408          *  of required functions (copyarea(), fillrect(), and imageblit())
 409          *  takes over; acceleration engine should be in a quiescent state */
 410
 411 /* hints */
 412 #define FBINFO_VIRTFB           0x0004 /* FB is System RAM, not device. */
 413 #define FBINFO_PARTIAL_PAN_OK   0x0040 /* otw use pan only for double-buffering */
 414 #define FBINFO_READS_FAST       0x0080 /* soft-copy faster than rendering */
 415
 416 /* hardware supported ops */
 417 /*  semantics: when a bit is set, it indicates that the operation is
 418  *   accelerated by hardware.
 419  *  required functions will still work even if the bit is not set.
 420  *  optional functions may not even exist if the flag bit is not set.
 421  */
 422 #define FBINFO_HWACCEL_NONE             0x0000
 423 #define FBINFO_HWACCEL_COPYAREA         0x0100 /* required */
 424 #define FBINFO_HWACCEL_FILLRECT         0x0200 /* required */
 425 #define FBINFO_HWACCEL_IMAGEBLIT        0x0400 /* required */
 426 #define FBINFO_HWACCEL_ROTATE           0x0800 /* optional */
 427 #define FBINFO_HWACCEL_XPAN             0x1000 /* optional */
 428 #define FBINFO_HWACCEL_YPAN             0x2000 /* optional */
 429 #define FBINFO_HWACCEL_YWRAP            0x4000 /* optional */
 430
 431 #define FBINFO_MISC_USEREVENT          0x10000 /* event request
 432                                                   from userspace */
 433 #define FBINFO_MISC_TILEBLITTING       0x20000 /* use tile blitting */
 434
 435 /* A driver may set this flag to indicate that it does want a set_par to be
 436  * called every time when fbcon_switch is executed. The advantage is that with
 437  * this flag set you can really be sure that set_par is always called before
 438  * any of the functions dependent on the correct hardware state or altering
 439  * that state, even if you are using some broken X releases. The disadvantage
 440  * is that it introduces unwanted delays to every console switch if set_par
 441  * is slow. It is a good idea to try this flag in the drivers initialization
 442  * code whenever there is a bug report related to switching between X and the
 443  * framebuffer console.
 444  */
 445 #define FBINFO_MISC_ALWAYS_SETPAR   0x40000
 446
 447 /* where the fb is a firmware driver, and can be replaced with a proper one */
 448 #define FBINFO_MISC_FIRMWARE        0x80000
 449 /*
 450  * Host and GPU endianness differ.
 451  */
 452 #define FBINFO_FOREIGN_ENDIAN   0x100000
 453 /*
 454  * Big endian math. This is the same flags as above, but with different
 455  * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
 456  * and host endianness. Drivers should not use this flag.
 457  */
 458 #define FBINFO_BE_MATH  0x100000
 459
 460 /* report to the VT layer that this fb driver can accept forced console
 461    output like oopses */
 462 #define FBINFO_CAN_FORCE_OUTPUT     0x200000
 463
 464 struct fb_info {
 465         atomic_t count;
 466         int node;
 467         int flags;
 468         /*
 469          * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
 470          * a lcd is not mounted upright and fbcon should rotate to compensate.
 471          */
 472         int fbcon_rotate_hint;
 473         struct mutex lock;              /* Lock for open/release/ioctl funcs */
 474         struct mutex mm_lock;           /* Lock for fb_mmap and smem_* fields */
 475         struct fb_var_screeninfo var;   /* Current var */
 476         struct fb_fix_screeninfo fix;   /* Current fix */
 477         struct fb_monspecs monspecs;    /* Current Monitor specs */
 478         struct work_struct queue;       /* Framebuffer event queue */
 479         struct fb_pixmap pixmap;        /* Image hardware mapper */
 480         struct fb_pixmap sprite;        /* Cursor hardware mapper */
 481         struct fb_cmap cmap;            /* Current cmap */
 482         struct list_head modelist;      /* mode list */
 483         struct fb_videomode *mode;      /* current mode */
 484
 485 #ifdef CONFIG_FB_BACKLIGHT
 486         /* assigned backlight device */
 487         /* set before framebuffer registration,
 488            remove after unregister */
 489         struct backlight_device *bl_dev;
 490
 491         /* Backlight level curve */
 492         struct mutex bl_curve_mutex;
 493         u8 bl_curve[FB_BACKLIGHT_LEVELS];
 494 #endif
 495 #ifdef CONFIG_FB_DEFERRED_IO
 496         struct delayed_work deferred_work;
 497         struct fb_deferred_io *fbdefio;
 498 #endif
 499
 500         struct fb_ops *fbops;
 501         struct device *device;          /* This is the parent */
 502         struct device *dev;             /* This is this fb device */
 503         int class_flag;                    /* private sysfs flags */
 504 #ifdef CONFIG_FB_TILEBLITTING
 505         struct fb_tile_ops *tileops;    /* Tile Blitting */
 506 #endif
 507         union {
 508                 char __iomem *screen_base;      /* Virtual address */
 509                 char *screen_buffer;
 510         };
 511         unsigned long screen_size;      /* Amount of ioremapped VRAM or 0 */
 512         void *pseudo_palette;           /* Fake palette of 16 colors */
 513 #define FBINFO_STATE_RUNNING    0
 514 #define FBINFO_STATE_SUSPENDED  1
 515         u32 state;                      /* Hardware state i.e suspend */
 516         void *fbcon_par;                /* fbcon use-only private area */
 517         /* From here on everything is device dependent */
 518         void *par;
 519         /* we need the PCI or similar aperture base/size not
 520            smem_start/size as smem_start may just be an object
 521            allocated inside the aperture so may not actually overlap */
 522         struct apertures_struct {
 523                 unsigned int count;
 524                 struct aperture {
 525                         resource_size_t base;
 526                         resource_size_t size;
 527                 } ranges[0];
 528         } *apertures;
 529
 530         bool skip_vt_switch; /* no VT switch on suspend/resume required */
 531 };
 532
 533 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
 534         struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
 535                         + max_num * sizeof(struct aperture), GFP_KERNEL);
 536         if (!a)
 537                 return NULL;
 538         a->count = max_num;
 539         return a;
 540 }
 541
 542 #define FBINFO_FLAG_DEFAULT     FBINFO_DEFAULT
 543
 544 /* This will go away
 545  * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
 546  * when it wants to turn the acceleration engine on.  This is
 547  * really a separate operation, and should be modified via sysfs.
 548  *  But for now, we leave it broken with the following define
 549  */
 550 #define STUPID_ACCELF_TEXT_SHIT
 551
 552 // This will go away
 553 #if defined(__sparc__)
 554
 555 /* We map all of our framebuffers such that big-endian accesses
 556  * are what we want, so the following is sufficient.
 557  */
 558
 559 // This will go away
 560 #define fb_readb sbus_readb
 561 #define fb_readw sbus_readw
 562 #define fb_readl sbus_readl
 563 #define fb_readq sbus_readq
 564 #define fb_writeb sbus_writeb
 565 #define fb_writew sbus_writew
 566 #define fb_writel sbus_writel
 567 #define fb_writeq sbus_writeq
 568 #define fb_memset sbus_memset_io
 569 #define fb_memcpy_fromfb sbus_memcpy_fromio
 570 #define fb_memcpy_tofb sbus_memcpy_toio
 571
 572 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
 573         defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
 574         defined(__avr32__) || defined(__bfin__) || defined(__arm__) ||  \
 575         defined(__aarch64__)
 576
 577 #define fb_readb __raw_readb
 578 #define fb_readw __raw_readw
 579 #define fb_readl __raw_readl
 580 #define fb_readq __raw_readq
 581 #define fb_writeb __raw_writeb
 582 #define fb_writew __raw_writew
 583 #define fb_writel __raw_writel
 584 #define fb_writeq __raw_writeq
 585 #define fb_memset memset_io
 586 #define fb_memcpy_fromfb memcpy_fromio
 587 #define fb_memcpy_tofb memcpy_toio
 588
 589 #else
 590
 591 #define fb_readb(addr) (*(volatile u8 *) (addr))
 592 #define fb_readw(addr) (*(volatile u16 *) (addr))
 593 #define fb_readl(addr) (*(volatile u32 *) (addr))
 594 #define fb_readq(addr) (*(volatile u64 *) (addr))
 595 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
 596 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
 597 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
 598 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
 599 #define fb_memset memset
 600 #define fb_memcpy_fromfb memcpy
 601 #define fb_memcpy_tofb memcpy
 602
 603 #endif
 604
 605 #define FB_LEFT_POS(p, bpp)          (fb_be_math(p) ? (32 - (bpp)) : 0)
 606 #define FB_SHIFT_HIGH(p, val, bits)  (fb_be_math(p) ? (val) >> (bits) : \
 607                                                       (val) << (bits))
 608 #define FB_SHIFT_LOW(p, val, bits)   (fb_be_math(p) ? (val) << (bits) : \
 609                                                       (val) >> (bits))
 610
 611     /*
 612      *  `Generic' versions of the frame buffer device operations
 613      */
 614
 615 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
 616 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
 617 extern int fb_blank(struct fb_info *info, int blank);
 618 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 619 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 620 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
 621 /*
 622  * Drawing operations where framebuffer is in system RAM
 623  */
 624 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 625 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 626 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
 627 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
 628                            size_t count, loff_t *ppos);
 629 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 630                             size_t count, loff_t *ppos);
 631
 632 /* drivers/video/fbmem.c */
 633 extern int register_framebuffer(struct fb_info *fb_info);
 634 extern int unregister_framebuffer(struct fb_info *fb_info);
 635 extern int unlink_framebuffer(struct fb_info *fb_info);
 636 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
 637                                            const char *name, bool primary);
 638 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 639 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 640 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
 641 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 642                                 u32 height, u32 shift_high, u32 shift_low, u32 mod);
 643 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
 644 extern void fb_set_suspend(struct fb_info *info, int state);
 645 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
 646                               struct fb_fix_screeninfo *fix);
 647 extern int fb_get_options(const char *name, char **option);
 648 extern int fb_new_modelist(struct fb_info *info);
 649
 650 extern struct fb_info *registered_fb[FB_MAX];
 651 extern int num_registered_fb;
 652 extern struct class *fb_class;
 653
 654 extern int lock_fb_info(struct fb_info *info);
 655
 656 static inline void unlock_fb_info(struct fb_info *info)
 657 {
 658         mutex_unlock(&info->lock);
 659 }
 660
 661 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
 662                                            u8 *src, u32 s_pitch, u32 height)
 663 {
 664         u32 i, j;
 665
 666         d_pitch -= s_pitch;
 667
 668         for (i = height; i--; ) {
 669                 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
 670                 for (j = 0; j < s_pitch; j++)
 671                         *dst++ = *src++;
 672                 dst += d_pitch;
 673         }
 674 }
 675
 676 /* drivers/video/fb_defio.c */
 677 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
 678 extern void fb_deferred_io_init(struct fb_info *info);
 679 extern void fb_deferred_io_open(struct fb_info *info,
 680                                 struct inode *inode,
 681                                 struct file *file);
 682 extern void fb_deferred_io_cleanup(struct fb_info *info);
 683 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
 684                                 loff_t end, int datasync);
 685
 686 static inline bool fb_be_math(struct fb_info *info)
 687 {
 688 #ifdef CONFIG_FB_FOREIGN_ENDIAN
 689 #if defined(CONFIG_FB_BOTH_ENDIAN)
 690         return info->flags & FBINFO_BE_MATH;
 691 #elif defined(CONFIG_FB_BIG_ENDIAN)
 692         return true;
 693 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
 694         return false;
 695 #endif /* CONFIG_FB_BOTH_ENDIAN */
 696 #else
 697 #ifdef __BIG_ENDIAN
 698         return true;
 699 #else
 700         return false;
 701 #endif /* __BIG_ENDIAN */
 702 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
 703 }
 704
 705 /* drivers/video/fbsysfs.c */
 706 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
 707 extern void framebuffer_release(struct fb_info *info);
 708 extern int fb_init_device(struct fb_info *fb_info);
 709 extern void fb_cleanup_device(struct fb_info *head);
 710 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
 711
 712 /* drivers/video/fbmon.c */
 713 #define FB_MAXTIMINGS           0
 714 #define FB_VSYNCTIMINGS         1
 715 #define FB_HSYNCTIMINGS         2
 716 #define FB_DCLKTIMINGS          3
 717 #define FB_IGNOREMON            0x100
 718
 719 #define FB_MODE_IS_UNKNOWN      0
 720 #define FB_MODE_IS_DETAILED     1
 721 #define FB_MODE_IS_STANDARD     2
 722 #define FB_MODE_IS_VESA         4
 723 #define FB_MODE_IS_CALCULATED   8
 724 #define FB_MODE_IS_FIRST        16
 725 #define FB_MODE_IS_FROM_VAR     32
 726
 727 extern int fbmon_dpms(const struct fb_info *fb_info);
 728 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
 729                        struct fb_info *info);
 730 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
 731                             struct fb_info *info);
 732 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
 733 extern const unsigned char *fb_firmware_edid(struct device *device);
 734 extern void fb_edid_to_monspecs(unsigned char *edid,
 735                                 struct fb_monspecs *specs);
 736 extern void fb_edid_add_monspecs(unsigned char *edid,
 737                                  struct fb_monspecs *specs);
 738 extern void fb_destroy_modedb(struct fb_videomode *modedb);
 739 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
 740 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
 741
 742 extern int of_get_fb_videomode(struct device_node *np,
 743                                struct fb_videomode *fb,
 744                                int index);
 745 extern int fb_videomode_from_videomode(const struct videomode *vm,
 746                                        struct fb_videomode *fbmode);
 747
 748 /* drivers/video/modedb.c */
 749 #define VESA_MODEDB_SIZE 43
 750 #define DMT_SIZE 0x50
 751
 752 extern void fb_var_to_videomode(struct fb_videomode *mode,
 753                                 const struct fb_var_screeninfo *var);
 754 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
 755                                 const struct fb_videomode *mode);
 756 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
 757                             const struct fb_videomode *mode2);
 758 extern int fb_add_videomode(const struct fb_videomode *mode,
 759                             struct list_head *head);
 760 extern void fb_delete_videomode(const struct fb_videomode *mode,
 761                                 struct list_head *head);
 762 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
 763                                                 struct list_head *head);
 764 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
 765                                                     struct list_head *head);
 766 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
 767                                                        struct list_head *head);
 768 extern void fb_destroy_modelist(struct list_head *head);
 769 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
 770                                      struct list_head *head);
 771 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
 772                                                        struct list_head *head);
 773
 774 /* drivers/video/fbcmap.c */
 775 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
 776 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
 777 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
 778 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
 779 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
 780 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
 781 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
 782 extern const struct fb_cmap *fb_default_cmap(int len);
 783 extern void fb_invert_cmaps(void);
 784
 785 struct fb_videomode {
 786         const char *name;       /* optional */
 787         u32 refresh;            /* optional */
 788         u32 xres;
 789         u32 yres;
 790         u32 pixclock;
 791         u32 left_margin;
 792         u32 right_margin;
 793         u32 upper_margin;
 794         u32 lower_margin;
 795         u32 hsync_len;
 796         u32 vsync_len;
 797         u32 sync;
 798         u32 vmode;
 799         u32 flag;
 800 };
 801
 802 struct dmt_videomode {
 803         u32 dmt_id;
 804         u32 std_2byte_code;
 805         u32 cvt_3byte_code;
 806         const struct fb_videomode *mode;
 807 };
 808
 809 extern const char *fb_mode_option;
 810 extern const struct fb_videomode vesa_modes[];
 811 extern const struct fb_videomode cea_modes[65];
 812 extern const struct dmt_videomode dmt_modes[];
 813
 814 struct fb_modelist {
 815         struct list_head list;
 816         struct fb_videomode mode;
 817 };
 818
 819 extern int fb_find_mode(struct fb_var_screeninfo *var,
 820                         struct fb_info *info, const char *mode_option,
 821                         const struct fb_videomode *db,
 822                         unsigned int dbsize,
 823                         const struct fb_videomode *default_mode,
 824                         unsigned int default_bpp);
 825
 826 /* Convenience logging macros */
 827 #define fb_err(fb_info, fmt, ...)                                       \
 828         pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 829 #define fb_notice(info, fmt, ...)                                       \
 830         pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 831 #define fb_warn(fb_info, fmt, ...)                                      \
 832         pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 833 #define fb_info(fb_info, fmt, ...)                                      \
 834         pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 835 #define fb_dbg(fb_info, fmt, ...)                                       \
 836         pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 837
 838 #endif /* _LINUX_FB_H */