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TOMOYO Linux Cross Reference
Linux/include/linux/fb.h

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  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 */
839 

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