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/refcount.h>
   6 #include <linux/kgdb.h>
   7 #include <uapi/linux/fb.h>
   8
   9 #define FBIO_CURSOR            _IOWR('F', 0x08, struct fb_cursor_user)
  10
  11 #include <linux/fs.h>
  12 #include <linux/init.h>
  13 #include <linux/workqueue.h>
  14 #include <linux/notifier.h>
  15 #include <linux/list.h>
  16 #include <linux/backlight.h>
  17 #include <linux/slab.h>
  18 #include <asm/io.h>
  19
  20 struct vm_area_struct;
  21 struct fb_info;
  22 struct device;
  23 struct file;
  24 struct videomode;
  25 struct device_node;
  26
  27 /* Definitions below are used in the parsed monitor specs */
  28 #define FB_DPMS_ACTIVE_OFF      1
  29 #define FB_DPMS_SUSPEND         2
  30 #define FB_DPMS_STANDBY         4
  31
  32 #define FB_DISP_DDI             1
  33 #define FB_DISP_ANA_700_300     2
  34 #define FB_DISP_ANA_714_286     4
  35 #define FB_DISP_ANA_1000_400    8
  36 #define FB_DISP_ANA_700_000     16
  37
  38 #define FB_DISP_MONO            32
  39 #define FB_DISP_RGB             64
  40 #define FB_DISP_MULTI           128
  41 #define FB_DISP_UNKNOWN         256
  42
  43 #define FB_SIGNAL_NONE          0
  44 #define FB_SIGNAL_BLANK_BLANK   1
  45 #define FB_SIGNAL_SEPARATE      2
  46 #define FB_SIGNAL_COMPOSITE     4
  47 #define FB_SIGNAL_SYNC_ON_GREEN 8
  48 #define FB_SIGNAL_SERRATION_ON  16
  49
  50 #define FB_MISC_PRIM_COLOR      1
  51 #define FB_MISC_1ST_DETAIL      2       /* First Detailed Timing is preferred */
  52 #define FB_MISC_HDMI            4
  53 struct fb_chroma {
  54         __u32 redx;     /* in fraction of 1024 */
  55         __u32 greenx;
  56         __u32 bluex;
  57         __u32 whitex;
  58         __u32 redy;
  59         __u32 greeny;
  60         __u32 bluey;
  61         __u32 whitey;
  62 };
  63
  64 struct fb_monspecs {
  65         struct fb_chroma chroma;
  66         struct fb_videomode *modedb;    /* mode database */
  67         __u8  manufacturer[4];          /* Manufacturer */
  68         __u8  monitor[14];              /* Monitor String */
  69         __u8  serial_no[14];            /* Serial Number */
  70         __u8  ascii[14];                /* ? */
  71         __u32 modedb_len;               /* mode database length */
  72         __u32 model;                    /* Monitor Model */
  73         __u32 serial;                   /* Serial Number - Integer */
  74         __u32 year;                     /* Year manufactured */
  75         __u32 week;                     /* Week Manufactured */
  76         __u32 hfmin;                    /* hfreq lower limit (Hz) */
  77         __u32 hfmax;                    /* hfreq upper limit (Hz) */
  78         __u32 dclkmin;                  /* pixelclock lower limit (Hz) */
  79         __u32 dclkmax;                  /* pixelclock upper limit (Hz) */
  80         __u16 input;                    /* display type - see FB_DISP_* */
  81         __u16 dpms;                     /* DPMS support - see FB_DPMS_ */
  82         __u16 signal;                   /* Signal Type - see FB_SIGNAL_* */
  83         __u16 vfmin;                    /* vfreq lower limit (Hz) */
  84         __u16 vfmax;                    /* vfreq upper limit (Hz) */
  85         __u16 gamma;                    /* Gamma - in fractions of 100 */
  86         __u16 gtf       : 1;            /* supports GTF */
  87         __u16 misc;                     /* Misc flags - see FB_MISC_* */
  88         __u8  version;                  /* EDID version... */
  89         __u8  revision;                 /* ...and revision */
  90         __u8  max_x;                    /* Maximum horizontal size (cm) */
  91         __u8  max_y;                    /* Maximum vertical size (cm) */
  92 };
  93
  94 struct fb_cmap_user {
  95         __u32 start;                    /* First entry  */
  96         __u32 len;                      /* Number of entries */
  97         __u16 __user *red;              /* Red values   */
  98         __u16 __user *green;
  99         __u16 __user *blue;
 100         __u16 __user *transp;           /* transparency, can be NULL */
 101 };
 102
 103 struct fb_image_user {
 104         __u32 dx;                       /* Where to place image */
 105         __u32 dy;
 106         __u32 width;                    /* Size of image */
 107         __u32 height;
 108         __u32 fg_color;                 /* Only used when a mono bitmap */
 109         __u32 bg_color;
 110         __u8  depth;                    /* Depth of the image */
 111         const char __user *data;        /* Pointer to image data */
 112         struct fb_cmap_user cmap;       /* color map info */
 113 };
 114
 115 struct fb_cursor_user {
 116         __u16 set;                      /* what to set */
 117         __u16 enable;                   /* cursor on/off */
 118         __u16 rop;                      /* bitop operation */
 119         const char __user *mask;        /* cursor mask bits */
 120         struct fbcurpos hot;            /* cursor hot spot */
 121         struct fb_image_user image;     /* Cursor image */
 122 };
 123
 124 /*
 125  * Register/unregister for framebuffer events
 126  */
 127
 128 /*      The resolution of the passed in fb_info about to change */
 129 #define FB_EVENT_MODE_CHANGE            0x01
 130
 131 #ifdef CONFIG_GUMSTIX_AM200EPD
 132 /* only used by mach-pxa/am200epd.c */
 133 #define FB_EVENT_FB_REGISTERED          0x05
 134 #define FB_EVENT_FB_UNREGISTERED        0x06
 135 #endif
 136
 137 /*      A display blank is requested       */
 138 #define FB_EVENT_BLANK                  0x09
 139
 140 struct fb_event {
 141         struct fb_info *info;
 142         void *data;
 143 };
 144
 145 struct fb_blit_caps {
 146         u32 x;
 147         u32 y;
 148         u32 len;
 149         u32 flags;
 150 };
 151
 152 #ifdef CONFIG_FB_NOTIFY
 153 extern int fb_register_client(struct notifier_block *nb);
 154 extern int fb_unregister_client(struct notifier_block *nb);
 155 extern int fb_notifier_call_chain(unsigned long val, void *v);
 156 #else
 157 static inline int fb_register_client(struct notifier_block *nb)
 158 {
 159         return 0;
 160 };
 161
 162 static inline int fb_unregister_client(struct notifier_block *nb)
 163 {
 164         return 0;
 165 };
 166
 167 static inline int fb_notifier_call_chain(unsigned long val, void *v)
 168 {
 169         return 0;
 170 };
 171 #endif
 172
 173 /*
 174  * Pixmap structure definition
 175  *
 176  * The purpose of this structure is to translate data
 177  * from the hardware independent format of fbdev to what
 178  * format the hardware needs.
 179  */
 180
 181 #define FB_PIXMAP_DEFAULT 1     /* used internally by fbcon */
 182 #define FB_PIXMAP_SYSTEM  2     /* memory is in system RAM  */
 183 #define FB_PIXMAP_IO      4     /* memory is iomapped       */
 184 #define FB_PIXMAP_SYNC    256   /* set if GPU can DMA       */
 185
 186 struct fb_pixmap {
 187         u8  *addr;              /* pointer to memory                    */
 188         u32 size;               /* size of buffer in bytes              */
 189         u32 offset;             /* current offset to buffer             */
 190         u32 buf_align;          /* byte alignment of each bitmap        */
 191         u32 scan_align;         /* alignment per scanline               */
 192         u32 access_align;       /* alignment per read/write (bits)      */
 193         u32 flags;              /* see FB_PIXMAP_*                      */
 194         u32 blit_x;             /* supported bit block dimensions (1-32)*/
 195         u32 blit_y;             /* Format: blit_x = 1 << (width - 1)    */
 196                                 /*         blit_y = 1 << (height - 1)   */
 197                                 /* if 0, will be set to 0xffffffff (all)*/
 198         /* access methods */
 199         void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
 200         void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
 201 };
 202
 203 #ifdef CONFIG_FB_DEFERRED_IO
 204 struct fb_deferred_io {
 205         /* delay between mkwrite and deferred handler */
 206         unsigned long delay;
 207         struct mutex lock; /* mutex that protects the page list */
 208         struct list_head pagelist; /* list of touched pages */
 209         /* callback */
 210         void (*first_io)(struct fb_info *info);
 211         void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
 212 };
 213 #endif
 214
 215 /*
 216  * Frame buffer operations
 217  *
 218  * LOCKING NOTE: those functions must _ALL_ be called with the console
 219  * semaphore held, this is the only suitable locking mechanism we have
 220  * in 2.6. Some may be called at interrupt time at this point though.
 221  *
 222  * The exception to this is the debug related hooks.  Putting the fb
 223  * into a debug state (e.g. flipping to the kernel console) and restoring
 224  * it must be done in a lock-free manner, so low level drivers should
 225  * keep track of the initial console (if applicable) and may need to
 226  * perform direct, unlocked hardware writes in these hooks.
 227  */
 228
 229 struct fb_ops {
 230         /* open/release and usage marking */
 231         struct module *owner;
 232         int (*fb_open)(struct fb_info *info, int user);
 233         int (*fb_release)(struct fb_info *info, int user);
 234
 235         /* For framebuffers with strange non linear layouts or that do not
 236          * work with normal memory mapped access
 237          */
 238         ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
 239                            size_t count, loff_t *ppos);
 240         ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
 241                             size_t count, loff_t *ppos);
 242
 243         /* checks var and eventually tweaks it to something supported,
 244          * DO NOT MODIFY PAR */
 245         int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
 246
 247         /* set the video mode according to info->var */
 248         int (*fb_set_par)(struct fb_info *info);
 249
 250         /* set color register */
 251         int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
 252                             unsigned blue, unsigned transp, struct fb_info *info);
 253
 254         /* set color registers in batch */
 255         int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
 256
 257         /* blank display */
 258         int (*fb_blank)(int blank, struct fb_info *info);
 259
 260         /* pan display */
 261         int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
 262
 263         /* Draws a rectangle */
 264         void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
 265         /* Copy data from area to another. Obsolete. */
 266         void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
 267         /* Draws a image to the display */
 268         void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
 269
 270         /* Draws cursor */
 271         int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
 272
 273         /* wait for blit idle, optional */
 274         int (*fb_sync)(struct fb_info *info);
 275
 276         /* perform fb specific ioctl (optional) */
 277         int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
 278                         unsigned long arg);
 279
 280         /* Handle 32bit compat ioctl (optional) */
 281         int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
 282                         unsigned long arg);
 283
 284         /* perform fb specific mmap */
 285         int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
 286
 287         /* get capability given var */
 288         void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
 289                             struct fb_var_screeninfo *var);
 290
 291         /* teardown any resources to do with this framebuffer */
 292         void (*fb_destroy)(struct fb_info *info);
 293
 294         /* called at KDB enter and leave time to prepare the console */
 295         int (*fb_debug_enter)(struct fb_info *info);
 296         int (*fb_debug_leave)(struct fb_info *info);
 297 };
 298
 299 #ifdef CONFIG_FB_TILEBLITTING
 300 #define FB_TILE_CURSOR_NONE        0
 301 #define FB_TILE_CURSOR_UNDERLINE   1
 302 #define FB_TILE_CURSOR_LOWER_THIRD 2
 303 #define FB_TILE_CURSOR_LOWER_HALF  3
 304 #define FB_TILE_CURSOR_TWO_THIRDS  4
 305 #define FB_TILE_CURSOR_BLOCK       5
 306
 307 struct fb_tilemap {
 308         __u32 width;                /* width of each tile in pixels */
 309         __u32 height;               /* height of each tile in scanlines */
 310         __u32 depth;                /* color depth of each tile */
 311         __u32 length;               /* number of tiles in the map */
 312         const __u8 *data;           /* actual tile map: a bitmap array, packed
 313                                        to the nearest byte */
 314 };
 315
 316 struct fb_tilerect {
 317         __u32 sx;                   /* origin in the x-axis */
 318         __u32 sy;                   /* origin in the y-axis */
 319         __u32 width;                /* number of tiles in the x-axis */
 320         __u32 height;               /* number of tiles in the y-axis */
 321         __u32 index;                /* what tile to use: index to tile map */
 322         __u32 fg;                   /* foreground color */
 323         __u32 bg;                   /* background color */
 324         __u32 rop;                  /* raster operation */
 325 };
 326
 327 struct fb_tilearea {
 328         __u32 sx;                   /* source origin in the x-axis */
 329         __u32 sy;                   /* source origin in the y-axis */
 330         __u32 dx;                   /* destination origin in the x-axis */
 331         __u32 dy;                   /* destination origin in the y-axis */
 332         __u32 width;                /* number of tiles in the x-axis */
 333         __u32 height;               /* number of tiles in the y-axis */
 334 };
 335
 336 struct fb_tileblit {
 337         __u32 sx;                   /* origin in the x-axis */
 338         __u32 sy;                   /* origin in the y-axis */
 339         __u32 width;                /* number of tiles in the x-axis */
 340         __u32 height;               /* number of tiles in the y-axis */
 341         __u32 fg;                   /* foreground color */
 342         __u32 bg;                   /* background color */
 343         __u32 length;               /* number of tiles to draw */
 344         __u32 *indices;             /* array of indices to tile map */
 345 };
 346
 347 struct fb_tilecursor {
 348         __u32 sx;                   /* cursor position in the x-axis */
 349         __u32 sy;                   /* cursor position in the y-axis */
 350         __u32 mode;                 /* 0 = erase, 1 = draw */
 351         __u32 shape;                /* see FB_TILE_CURSOR_* */
 352         __u32 fg;                   /* foreground color */
 353         __u32 bg;                   /* background color */
 354 };
 355
 356 struct fb_tile_ops {
 357         /* set tile characteristics */
 358         void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
 359
 360         /* all dimensions from hereon are in terms of tiles */
 361
 362         /* move a rectangular region of tiles from one area to another*/
 363         void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
 364         /* fill a rectangular region with a tile */
 365         void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
 366         /* copy an array of tiles */
 367         void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
 368         /* cursor */
 369         void (*fb_tilecursor)(struct fb_info *info,
 370                               struct fb_tilecursor *cursor);
 371         /* get maximum length of the tile map */
 372         int (*fb_get_tilemax)(struct fb_info *info);
 373 };
 374 #endif /* CONFIG_FB_TILEBLITTING */
 375
 376 /* FBINFO_* = fb_info.flags bit flags */
 377 #define FBINFO_DEFAULT          0
 378 #define FBINFO_HWACCEL_DISABLED 0x0002
 379         /* When FBINFO_HWACCEL_DISABLED is set:
 380          *  Hardware acceleration is turned off.  Software implementations
 381          *  of required functions (copyarea(), fillrect(), and imageblit())
 382          *  takes over; acceleration engine should be in a quiescent state */
 383
 384 /* hints */
 385 #define FBINFO_VIRTFB           0x0004 /* FB is System RAM, not device. */
 386 #define FBINFO_PARTIAL_PAN_OK   0x0040 /* otw use pan only for double-buffering */
 387 #define FBINFO_READS_FAST       0x0080 /* soft-copy faster than rendering */
 388
 389 /* hardware supported ops */
 390 /*  semantics: when a bit is set, it indicates that the operation is
 391  *   accelerated by hardware.
 392  *  required functions will still work even if the bit is not set.
 393  *  optional functions may not even exist if the flag bit is not set.
 394  */
 395 #define FBINFO_HWACCEL_NONE             0x0000
 396 #define FBINFO_HWACCEL_COPYAREA         0x0100 /* required */
 397 #define FBINFO_HWACCEL_FILLRECT         0x0200 /* required */
 398 #define FBINFO_HWACCEL_IMAGEBLIT        0x0400 /* required */
 399 #define FBINFO_HWACCEL_ROTATE           0x0800 /* optional */
 400 #define FBINFO_HWACCEL_XPAN             0x1000 /* optional */
 401 #define FBINFO_HWACCEL_YPAN             0x2000 /* optional */
 402 #define FBINFO_HWACCEL_YWRAP            0x4000 /* optional */
 403
 404 #define FBINFO_MISC_TILEBLITTING       0x20000 /* use tile blitting */
 405
 406 /* A driver may set this flag to indicate that it does want a set_par to be
 407  * called every time when fbcon_switch is executed. The advantage is that with
 408  * this flag set you can really be sure that set_par is always called before
 409  * any of the functions dependent on the correct hardware state or altering
 410  * that state, even if you are using some broken X releases. The disadvantage
 411  * is that it introduces unwanted delays to every console switch if set_par
 412  * is slow. It is a good idea to try this flag in the drivers initialization
 413  * code whenever there is a bug report related to switching between X and the
 414  * framebuffer console.
 415  */
 416 #define FBINFO_MISC_ALWAYS_SETPAR   0x40000
 417
 418 /* where the fb is a firmware driver, and can be replaced with a proper one */
 419 #define FBINFO_MISC_FIRMWARE        0x80000
 420 /*
 421  * Host and GPU endianness differ.
 422  */
 423 #define FBINFO_FOREIGN_ENDIAN   0x100000
 424 /*
 425  * Big endian math. This is the same flags as above, but with different
 426  * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
 427  * and host endianness. Drivers should not use this flag.
 428  */
 429 #define FBINFO_BE_MATH  0x100000
 430 /*
 431  * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
 432  * drivers to stop userspace from trying to share buffers behind the kernel's
 433  * back. Instead dma-buf based buffer sharing should be used.
 434  */
 435 #define FBINFO_HIDE_SMEM_START  0x200000
 436
 437
 438 struct fb_info {
 439         refcount_t count;
 440         int node;
 441         int flags;
 442         /*
 443          * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
 444          * a lcd is not mounted upright and fbcon should rotate to compensate.
 445          */
 446         int fbcon_rotate_hint;
 447         struct mutex lock;              /* Lock for open/release/ioctl funcs */
 448         struct mutex mm_lock;           /* Lock for fb_mmap and smem_* fields */
 449         struct fb_var_screeninfo var;   /* Current var */
 450         struct fb_fix_screeninfo fix;   /* Current fix */
 451         struct fb_monspecs monspecs;    /* Current Monitor specs */
 452         struct work_struct queue;       /* Framebuffer event queue */
 453         struct fb_pixmap pixmap;        /* Image hardware mapper */
 454         struct fb_pixmap sprite;        /* Cursor hardware mapper */
 455         struct fb_cmap cmap;            /* Current cmap */
 456         struct list_head modelist;      /* mode list */
 457         struct fb_videomode *mode;      /* current mode */
 458
 459 #if IS_ENABLED(CONFIG_FB_BACKLIGHT)
 460         /* assigned backlight device */
 461         /* set before framebuffer registration,
 462            remove after unregister */
 463         struct backlight_device *bl_dev;
 464
 465         /* Backlight level curve */
 466         struct mutex bl_curve_mutex;
 467         u8 bl_curve[FB_BACKLIGHT_LEVELS];
 468 #endif
 469 #ifdef CONFIG_FB_DEFERRED_IO
 470         struct delayed_work deferred_work;
 471         struct fb_deferred_io *fbdefio;
 472 #endif
 473
 474         const struct fb_ops *fbops;
 475         struct device *device;          /* This is the parent */
 476         struct device *dev;             /* This is this fb device */
 477         int class_flag;                    /* private sysfs flags */
 478 #ifdef CONFIG_FB_TILEBLITTING
 479         struct fb_tile_ops *tileops;    /* Tile Blitting */
 480 #endif
 481         union {
 482                 char __iomem *screen_base;      /* Virtual address */
 483                 char *screen_buffer;
 484         };
 485         unsigned long screen_size;      /* Amount of ioremapped VRAM or 0 */
 486         void *pseudo_palette;           /* Fake palette of 16 colors */
 487 #define FBINFO_STATE_RUNNING    0
 488 #define FBINFO_STATE_SUSPENDED  1
 489         u32 state;                      /* Hardware state i.e suspend */
 490         void *fbcon_par;                /* fbcon use-only private area */
 491         /* From here on everything is device dependent */
 492         void *par;
 493         /* we need the PCI or similar aperture base/size not
 494            smem_start/size as smem_start may just be an object
 495            allocated inside the aperture so may not actually overlap */
 496         struct apertures_struct {
 497                 unsigned int count;
 498                 struct aperture {
 499                         resource_size_t base;
 500                         resource_size_t size;
 501                 } ranges[0];
 502         } *apertures;
 503
 504         bool skip_vt_switch; /* no VT switch on suspend/resume required */
 505         bool forced_out; /* set when being removed by another driver */
 506 };
 507
 508 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
 509         struct apertures_struct *a;
 510
 511         a = kzalloc(struct_size(a, ranges, max_num), GFP_KERNEL);
 512         if (!a)
 513                 return NULL;
 514         a->count = max_num;
 515         return a;
 516 }
 517
 518 #define FBINFO_FLAG_DEFAULT     FBINFO_DEFAULT
 519
 520 /* This will go away
 521  * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
 522  * when it wants to turn the acceleration engine on.  This is
 523  * really a separate operation, and should be modified via sysfs.
 524  *  But for now, we leave it broken with the following define
 525  */
 526 #define STUPID_ACCELF_TEXT_SHIT
 527
 528 // This will go away
 529 #if defined(__sparc__)
 530
 531 /* We map all of our framebuffers such that big-endian accesses
 532  * are what we want, so the following is sufficient.
 533  */
 534
 535 // This will go away
 536 #define fb_readb sbus_readb
 537 #define fb_readw sbus_readw
 538 #define fb_readl sbus_readl
 539 #define fb_readq sbus_readq
 540 #define fb_writeb sbus_writeb
 541 #define fb_writew sbus_writew
 542 #define fb_writel sbus_writel
 543 #define fb_writeq sbus_writeq
 544 #define fb_memset sbus_memset_io
 545 #define fb_memcpy_fromfb sbus_memcpy_fromio
 546 #define fb_memcpy_tofb sbus_memcpy_toio
 547
 548 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
 549         defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
 550         defined(__arm__) || defined(__aarch64__)
 551
 552 #define fb_readb __raw_readb
 553 #define fb_readw __raw_readw
 554 #define fb_readl __raw_readl
 555 #define fb_readq __raw_readq
 556 #define fb_writeb __raw_writeb
 557 #define fb_writew __raw_writew
 558 #define fb_writel __raw_writel
 559 #define fb_writeq __raw_writeq
 560 #define fb_memset memset_io
 561 #define fb_memcpy_fromfb memcpy_fromio
 562 #define fb_memcpy_tofb memcpy_toio
 563
 564 #else
 565
 566 #define fb_readb(addr) (*(volatile u8 *) (addr))
 567 #define fb_readw(addr) (*(volatile u16 *) (addr))
 568 #define fb_readl(addr) (*(volatile u32 *) (addr))
 569 #define fb_readq(addr) (*(volatile u64 *) (addr))
 570 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
 571 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
 572 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
 573 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
 574 #define fb_memset memset
 575 #define fb_memcpy_fromfb memcpy
 576 #define fb_memcpy_tofb memcpy
 577
 578 #endif
 579
 580 #define FB_LEFT_POS(p, bpp)          (fb_be_math(p) ? (32 - (bpp)) : 0)
 581 #define FB_SHIFT_HIGH(p, val, bits)  (fb_be_math(p) ? (val) >> (bits) : \
 582                                                       (val) << (bits))
 583 #define FB_SHIFT_LOW(p, val, bits)   (fb_be_math(p) ? (val) << (bits) : \
 584                                                       (val) >> (bits))
 585
 586     /*
 587      *  `Generic' versions of the frame buffer device operations
 588      */
 589
 590 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
 591 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
 592 extern int fb_blank(struct fb_info *info, int blank);
 593 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 594 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 595 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
 596 /*
 597  * Drawing operations where framebuffer is in system RAM
 598  */
 599 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
 600 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
 601 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
 602 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
 603                            size_t count, loff_t *ppos);
 604 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
 605                             size_t count, loff_t *ppos);
 606
 607 /* drivers/video/fbmem.c */
 608 extern int register_framebuffer(struct fb_info *fb_info);
 609 extern void unregister_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 bool is_firmware_framebuffer(struct apertures_struct *a);
 615 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
 616 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
 617 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
 618 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 619                                 u32 height, u32 shift_high, u32 shift_low, u32 mod);
 620 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
 621 extern void fb_set_suspend(struct fb_info *info, int state);
 622 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
 623                               struct fb_fix_screeninfo *fix);
 624 extern int fb_get_options(const char *name, char **option);
 625 extern int fb_new_modelist(struct fb_info *info);
 626
 627 extern struct fb_info *registered_fb[FB_MAX];
 628 extern int num_registered_fb;
 629 extern bool fb_center_logo;
 630 extern int fb_logo_count;
 631 extern struct class *fb_class;
 632
 633 #define for_each_registered_fb(i)               \
 634         for (i = 0; i < FB_MAX; i++)            \
 635                 if (!registered_fb[i]) {} else
 636
 637 static inline void lock_fb_info(struct fb_info *info)
 638 {
 639         mutex_lock(&info->lock);
 640 }
 641
 642 static inline void unlock_fb_info(struct fb_info *info)
 643 {
 644         mutex_unlock(&info->lock);
 645 }
 646
 647 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
 648                                            u8 *src, u32 s_pitch, u32 height)
 649 {
 650         u32 i, j;
 651
 652         d_pitch -= s_pitch;
 653
 654         for (i = height; i--; ) {
 655                 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
 656                 for (j = 0; j < s_pitch; j++)
 657                         *dst++ = *src++;
 658                 dst += d_pitch;
 659         }
 660 }
 661
 662 /* drivers/video/fb_defio.c */
 663 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
 664 extern void fb_deferred_io_init(struct fb_info *info);
 665 extern void fb_deferred_io_open(struct fb_info *info,
 666                                 struct inode *inode,
 667                                 struct file *file);
 668 extern void fb_deferred_io_cleanup(struct fb_info *info);
 669 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
 670                                 loff_t end, int datasync);
 671
 672 static inline bool fb_be_math(struct fb_info *info)
 673 {
 674 #ifdef CONFIG_FB_FOREIGN_ENDIAN
 675 #if defined(CONFIG_FB_BOTH_ENDIAN)
 676         return info->flags & FBINFO_BE_MATH;
 677 #elif defined(CONFIG_FB_BIG_ENDIAN)
 678         return true;
 679 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
 680         return false;
 681 #endif /* CONFIG_FB_BOTH_ENDIAN */
 682 #else
 683 #ifdef __BIG_ENDIAN
 684         return true;
 685 #else
 686         return false;
 687 #endif /* __BIG_ENDIAN */
 688 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
 689 }
 690
 691 /* drivers/video/fbsysfs.c */
 692 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
 693 extern void framebuffer_release(struct fb_info *info);
 694 extern int fb_init_device(struct fb_info *fb_info);
 695 extern void fb_cleanup_device(struct fb_info *head);
 696 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
 697
 698 /* drivers/video/fbmon.c */
 699 #define FB_MAXTIMINGS           0
 700 #define FB_VSYNCTIMINGS         1
 701 #define FB_HSYNCTIMINGS         2
 702 #define FB_DCLKTIMINGS          3
 703 #define FB_IGNOREMON            0x100
 704
 705 #define FB_MODE_IS_UNKNOWN      0
 706 #define FB_MODE_IS_DETAILED     1
 707 #define FB_MODE_IS_STANDARD     2
 708 #define FB_MODE_IS_VESA         4
 709 #define FB_MODE_IS_CALCULATED   8
 710 #define FB_MODE_IS_FIRST        16
 711 #define FB_MODE_IS_FROM_VAR     32
 712
 713 extern int fbmon_dpms(const struct fb_info *fb_info);
 714 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
 715                        struct fb_info *info);
 716 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
 717                             struct fb_info *info);
 718 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
 719 extern const unsigned char *fb_firmware_edid(struct device *device);
 720 extern void fb_edid_to_monspecs(unsigned char *edid,
 721                                 struct fb_monspecs *specs);
 722 extern void fb_destroy_modedb(struct fb_videomode *modedb);
 723 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
 724 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
 725
 726 extern int of_get_fb_videomode(struct device_node *np,
 727                                struct fb_videomode *fb,
 728                                int index);
 729 extern int fb_videomode_from_videomode(const struct videomode *vm,
 730                                        struct fb_videomode *fbmode);
 731
 732 /* drivers/video/modedb.c */
 733 #define VESA_MODEDB_SIZE 43
 734 #define DMT_SIZE 0x50
 735
 736 extern void fb_var_to_videomode(struct fb_videomode *mode,
 737                                 const struct fb_var_screeninfo *var);
 738 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
 739                                 const struct fb_videomode *mode);
 740 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
 741                             const struct fb_videomode *mode2);
 742 extern int fb_add_videomode(const struct fb_videomode *mode,
 743                             struct list_head *head);
 744 extern void fb_delete_videomode(const struct fb_videomode *mode,
 745                                 struct list_head *head);
 746 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
 747                                                 struct list_head *head);
 748 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
 749                                                     struct list_head *head);
 750 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
 751                                                        struct list_head *head);
 752 extern void fb_destroy_modelist(struct list_head *head);
 753 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
 754                                      struct list_head *head);
 755 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
 756                                                        struct list_head *head);
 757
 758 /* drivers/video/fbcmap.c */
 759 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
 760 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
 761 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
 762 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
 763 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
 764 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
 765 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
 766 extern const struct fb_cmap *fb_default_cmap(int len);
 767 extern void fb_invert_cmaps(void);
 768
 769 struct fb_videomode {
 770         const char *name;       /* optional */
 771         u32 refresh;            /* optional */
 772         u32 xres;
 773         u32 yres;
 774         u32 pixclock;
 775         u32 left_margin;
 776         u32 right_margin;
 777         u32 upper_margin;
 778         u32 lower_margin;
 779         u32 hsync_len;
 780         u32 vsync_len;
 781         u32 sync;
 782         u32 vmode;
 783         u32 flag;
 784 };
 785
 786 struct dmt_videomode {
 787         u32 dmt_id;
 788         u32 std_2byte_code;
 789         u32 cvt_3byte_code;
 790         const struct fb_videomode *mode;
 791 };
 792
 793 extern const char *fb_mode_option;
 794 extern const struct fb_videomode vesa_modes[];
 795 extern const struct dmt_videomode dmt_modes[];
 796
 797 struct fb_modelist {
 798         struct list_head list;
 799         struct fb_videomode mode;
 800 };
 801
 802 extern int fb_find_mode(struct fb_var_screeninfo *var,
 803                         struct fb_info *info, const char *mode_option,
 804                         const struct fb_videomode *db,
 805                         unsigned int dbsize,
 806                         const struct fb_videomode *default_mode,
 807                         unsigned int default_bpp);
 808
 809 /* Convenience logging macros */
 810 #define fb_err(fb_info, fmt, ...)                                       \
 811         pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 812 #define fb_notice(info, fmt, ...)                                       \
 813         pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 814 #define fb_warn(fb_info, fmt, ...)                                      \
 815         pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 816 #define fb_info(fb_info, fmt, ...)                                      \
 817         pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 818 #define fb_dbg(fb_info, fmt, ...)                                       \
 819         pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
 820
 821 #endif /* _LINUX_FB_H */