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Linux/include/linux/fb.h

  1 #ifndef _LINUX_FB_H
  2 #define _LINUX_FB_H
  3 
  4 #include <linux/kgdb.h>
  5 #include <uapi/linux/fb.h>
  6 
  7 #define FBIO_CURSOR            _IOWR('F', 0x08, struct fb_cursor_user)
  8 
  9 #include <linux/fs.h>
 10 #include <linux/init.h>
 11 #include <linux/workqueue.h>
 12 #include <linux/notifier.h>
 13 #include <linux/list.h>
 14 #include <linux/backlight.h>
 15 #include <linux/slab.h>
 16 #include <asm/io.h>
 17 
 18 struct vm_area_struct;
 19 struct fb_info;
 20 struct device;
 21 struct file;
 22 struct videomode;
 23 struct device_node;
 24 
 25 /* Definitions below are used in the parsed monitor specs */
 26 #define FB_DPMS_ACTIVE_OFF      1
 27 #define FB_DPMS_SUSPEND         2
 28 #define FB_DPMS_STANDBY         4
 29 
 30 #define FB_DISP_DDI             1
 31 #define FB_DISP_ANA_700_300     2
 32 #define FB_DISP_ANA_714_286     4
 33 #define FB_DISP_ANA_1000_400    8
 34 #define FB_DISP_ANA_700_000     16
 35 
 36 #define FB_DISP_MONO            32
 37 #define FB_DISP_RGB             64
 38 #define FB_DISP_MULTI           128
 39 #define FB_DISP_UNKNOWN         256
 40 
 41 #define FB_SIGNAL_NONE          0
 42 #define FB_SIGNAL_BLANK_BLANK   1
 43 #define FB_SIGNAL_SEPARATE      2
 44 #define FB_SIGNAL_COMPOSITE     4
 45 #define FB_SIGNAL_SYNC_ON_GREEN 8
 46 #define FB_SIGNAL_SERRATION_ON  16
 47 
 48 #define FB_MISC_PRIM_COLOR      1
 49 #define FB_MISC_1ST_DETAIL      2       /* First Detailed Timing is preferred */
 50 #define FB_MISC_HDMI            4
 51 struct fb_chroma {
 52         __u32 redx;     /* in fraction of 1024 */
 53         __u32 greenx;
 54         __u32 bluex;
 55         __u32 whitex;
 56         __u32 redy;
 57         __u32 greeny;
 58         __u32 bluey;
 59         __u32 whitey;
 60 };
 61 
 62 struct fb_monspecs {
 63         struct fb_chroma chroma;
 64         struct fb_videomode *modedb;    /* mode database */
 65         __u8  manufacturer[4];          /* Manufacturer */
 66         __u8  monitor[14];              /* Monitor String */
 67         __u8  serial_no[14];            /* Serial Number */
 68         __u8  ascii[14];                /* ? */
 69         __u32 modedb_len;               /* mode database length */
 70         __u32 model;                    /* Monitor Model */
 71         __u32 serial;                   /* Serial Number - Integer */
 72         __u32 year;                     /* Year manufactured */
 73         __u32 week;                     /* Week Manufactured */
 74         __u32 hfmin;                    /* hfreq lower limit (Hz) */
 75         __u32 hfmax;                    /* hfreq upper limit (Hz) */
 76         __u32 dclkmin;                  /* pixelclock lower limit (Hz) */
 77         __u32 dclkmax;                  /* pixelclock upper limit (Hz) */
 78         __u16 input;                    /* display type - see FB_DISP_* */
 79         __u16 dpms;                     /* DPMS support - see FB_DPMS_ */
 80         __u16 signal;                   /* Signal Type - see FB_SIGNAL_* */
 81         __u16 vfmin;                    /* vfreq lower limit (Hz) */
 82         __u16 vfmax;                    /* vfreq upper limit (Hz) */
 83         __u16 gamma;                    /* Gamma - in fractions of 100 */
 84         __u16 gtf       : 1;            /* supports GTF */
 85         __u16 misc;                     /* Misc flags - see FB_MISC_* */
 86         __u8  version;                  /* EDID version... */
 87         __u8  revision;                 /* ...and revision */
 88         __u8  max_x;                    /* Maximum horizontal size (cm) */
 89         __u8  max_y;                    /* Maximum vertical size (cm) */
 90 };
 91 
 92 struct fb_cmap_user {
 93         __u32 start;                    /* First entry  */
 94         __u32 len;                      /* Number of entries */
 95         __u16 __user *red;              /* Red values   */
 96         __u16 __user *green;
 97         __u16 __user *blue;
 98         __u16 __user *transp;           /* transparency, can be NULL */
 99 };
100 
101 struct fb_image_user {
102         __u32 dx;                       /* Where to place image */
103         __u32 dy;
104         __u32 width;                    /* Size of image */
105         __u32 height;
106         __u32 fg_color;                 /* Only used when a mono bitmap */
107         __u32 bg_color;
108         __u8  depth;                    /* Depth of the image */
109         const char __user *data;        /* Pointer to image data */
110         struct fb_cmap_user cmap;       /* color map info */
111 };
112 
113 struct fb_cursor_user {
114         __u16 set;                      /* what to set */
115         __u16 enable;                   /* cursor on/off */
116         __u16 rop;                      /* bitop operation */
117         const char __user *mask;        /* cursor mask bits */
118         struct fbcurpos hot;            /* cursor hot spot */
119         struct fb_image_user image;     /* Cursor image */
120 };
121 
122 /*
123  * Register/unregister for framebuffer events
124  */
125 
126 /*      The resolution of the passed in fb_info about to change */ 
127 #define FB_EVENT_MODE_CHANGE            0x01
128 /*      The display on this fb_info is beeing suspended, no access to the
129  *      framebuffer is allowed any more after that call returns
130  */
131 #define FB_EVENT_SUSPEND                0x02
132 /*      The display on this fb_info was resumed, you can restore the display
133  *      if you own it
134  */
135 #define FB_EVENT_RESUME                 0x03
136 /*      An entry from the modelist was removed */
137 #define FB_EVENT_MODE_DELETE            0x04
138 /*      A driver registered itself */
139 #define FB_EVENT_FB_REGISTERED          0x05
140 /*      A driver unregistered itself */
141 #define FB_EVENT_FB_UNREGISTERED        0x06
142 /*      CONSOLE-SPECIFIC: get console to framebuffer mapping */
143 #define FB_EVENT_GET_CONSOLE_MAP        0x07
144 /*      CONSOLE-SPECIFIC: set console to framebuffer mapping */
145 #define FB_EVENT_SET_CONSOLE_MAP        0x08
146 /*      A hardware display blank change occurred */
147 #define FB_EVENT_BLANK                  0x09
148 /*      Private modelist is to be replaced */
149 #define FB_EVENT_NEW_MODELIST           0x0A
150 /*      The resolution of the passed in fb_info about to change and
151         all vc's should be changed         */
152 #define FB_EVENT_MODE_CHANGE_ALL        0x0B
153 /*      A software display blank change occurred */
154 #define FB_EVENT_CONBLANK               0x0C
155 /*      Get drawing requirements        */
156 #define FB_EVENT_GET_REQ                0x0D
157 /*      Unbind from the console if possible */
158 #define FB_EVENT_FB_UNBIND              0x0E
159 /*      CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
160 #define FB_EVENT_REMAP_ALL_CONSOLE      0x0F
161 /*      A hardware display blank early change occured */
162 #define FB_EARLY_EVENT_BLANK            0x10
163 /*      A hardware display blank revert early change occured */
164 #define FB_R_EARLY_EVENT_BLANK          0x11
165 
166 struct fb_event {
167         struct fb_info *info;
168         void *data;
169 };
170 
171 struct fb_blit_caps {
172         u32 x;
173         u32 y;
174         u32 len;
175         u32 flags;
176 };
177 
178 #ifdef CONFIG_FB_NOTIFY
179 extern int fb_register_client(struct notifier_block *nb);
180 extern int fb_unregister_client(struct notifier_block *nb);
181 extern int fb_notifier_call_chain(unsigned long val, void *v);
182 #else
183 static inline int fb_register_client(struct notifier_block *nb)
184 {
185         return 0;
186 };
187 
188 static inline int fb_unregister_client(struct notifier_block *nb)
189 {
190         return 0;
191 };
192 
193 static inline int fb_notifier_call_chain(unsigned long val, void *v)
194 {
195         return 0;
196 };
197 #endif
198 
199 /*
200  * Pixmap structure definition
201  *
202  * The purpose of this structure is to translate data
203  * from the hardware independent format of fbdev to what
204  * format the hardware needs.
205  */
206 
207 #define FB_PIXMAP_DEFAULT 1     /* used internally by fbcon */
208 #define FB_PIXMAP_SYSTEM  2     /* memory is in system RAM  */
209 #define FB_PIXMAP_IO      4     /* memory is iomapped       */
210 #define FB_PIXMAP_SYNC    256   /* set if GPU can DMA       */
211 
212 struct fb_pixmap {
213         u8  *addr;              /* pointer to memory                    */
214         u32 size;               /* size of buffer in bytes              */
215         u32 offset;             /* current offset to buffer             */
216         u32 buf_align;          /* byte alignment of each bitmap        */
217         u32 scan_align;         /* alignment per scanline               */
218         u32 access_align;       /* alignment per read/write (bits)      */
219         u32 flags;              /* see FB_PIXMAP_*                      */
220         u32 blit_x;             /* supported bit block dimensions (1-32)*/
221         u32 blit_y;             /* Format: blit_x = 1 << (width - 1)    */
222                                 /*         blit_y = 1 << (height - 1)   */
223                                 /* if 0, will be set to 0xffffffff (all)*/
224         /* access methods */
225         void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size);
226         void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);
227 };
228 
229 #ifdef CONFIG_FB_DEFERRED_IO
230 struct fb_deferred_io {
231         /* delay between mkwrite and deferred handler */
232         unsigned long delay;
233         struct mutex lock; /* mutex that protects the page list */
234         struct list_head pagelist; /* list of touched pages */
235         /* callback */
236         void (*first_io)(struct fb_info *info);
237         void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);
238 };
239 #endif
240 
241 /*
242  * Frame buffer operations
243  *
244  * LOCKING NOTE: those functions must _ALL_ be called with the console
245  * semaphore held, this is the only suitable locking mechanism we have
246  * in 2.6. Some may be called at interrupt time at this point though.
247  *
248  * The exception to this is the debug related hooks.  Putting the fb
249  * into a debug state (e.g. flipping to the kernel console) and restoring
250  * it must be done in a lock-free manner, so low level drivers should
251  * keep track of the initial console (if applicable) and may need to
252  * perform direct, unlocked hardware writes in these hooks.
253  */
254 
255 struct fb_ops {
256         /* open/release and usage marking */
257         struct module *owner;
258         int (*fb_open)(struct fb_info *info, int user);
259         int (*fb_release)(struct fb_info *info, int user);
260 
261         /* For framebuffers with strange non linear layouts or that do not
262          * work with normal memory mapped access
263          */
264         ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
265                            size_t count, loff_t *ppos);
266         ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
267                             size_t count, loff_t *ppos);
268 
269         /* checks var and eventually tweaks it to something supported,
270          * DO NOT MODIFY PAR */
271         int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info);
272 
273         /* set the video mode according to info->var */
274         int (*fb_set_par)(struct fb_info *info);
275 
276         /* set color register */
277         int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green,
278                             unsigned blue, unsigned transp, struct fb_info *info);
279 
280         /* set color registers in batch */
281         int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info);
282 
283         /* blank display */
284         int (*fb_blank)(int blank, struct fb_info *info);
285 
286         /* pan display */
287         int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info);
288 
289         /* Draws a rectangle */
290         void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect);
291         /* Copy data from area to another */
292         void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region);
293         /* Draws a image to the display */
294         void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image);
295 
296         /* Draws cursor */
297         int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor);
298 
299         /* Rotates the display */
300         void (*fb_rotate)(struct fb_info *info, int angle);
301 
302         /* wait for blit idle, optional */
303         int (*fb_sync)(struct fb_info *info);
304 
305         /* perform fb specific ioctl (optional) */
306         int (*fb_ioctl)(struct fb_info *info, unsigned int cmd,
307                         unsigned long arg);
308 
309         /* Handle 32bit compat ioctl (optional) */
310         int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd,
311                         unsigned long arg);
312 
313         /* perform fb specific mmap */
314         int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma);
315 
316         /* get capability given var */
317         void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps,
318                             struct fb_var_screeninfo *var);
319 
320         /* teardown any resources to do with this framebuffer */
321         void (*fb_destroy)(struct fb_info *info);
322 
323         /* called at KDB enter and leave time to prepare the console */
324         int (*fb_debug_enter)(struct fb_info *info);
325         int (*fb_debug_leave)(struct fb_info *info);
326 };
327 
328 #ifdef CONFIG_FB_TILEBLITTING
329 #define FB_TILE_CURSOR_NONE        0
330 #define FB_TILE_CURSOR_UNDERLINE   1
331 #define FB_TILE_CURSOR_LOWER_THIRD 2
332 #define FB_TILE_CURSOR_LOWER_HALF  3
333 #define FB_TILE_CURSOR_TWO_THIRDS  4
334 #define FB_TILE_CURSOR_BLOCK       5
335 
336 struct fb_tilemap {
337         __u32 width;                /* width of each tile in pixels */
338         __u32 height;               /* height of each tile in scanlines */
339         __u32 depth;                /* color depth of each tile */
340         __u32 length;               /* number of tiles in the map */
341         const __u8 *data;           /* actual tile map: a bitmap array, packed
342                                        to the nearest byte */
343 };
344 
345 struct fb_tilerect {
346         __u32 sx;                   /* origin in the x-axis */
347         __u32 sy;                   /* origin in the y-axis */
348         __u32 width;                /* number of tiles in the x-axis */
349         __u32 height;               /* number of tiles in the y-axis */
350         __u32 index;                /* what tile to use: index to tile map */
351         __u32 fg;                   /* foreground color */
352         __u32 bg;                   /* background color */
353         __u32 rop;                  /* raster operation */
354 };
355 
356 struct fb_tilearea {
357         __u32 sx;                   /* source origin in the x-axis */
358         __u32 sy;                   /* source origin in the y-axis */
359         __u32 dx;                   /* destination origin in the x-axis */
360         __u32 dy;                   /* destination origin in the y-axis */
361         __u32 width;                /* number of tiles in the x-axis */
362         __u32 height;               /* number of tiles in the y-axis */
363 };
364 
365 struct fb_tileblit {
366         __u32 sx;                   /* origin in the x-axis */
367         __u32 sy;                   /* origin in the y-axis */
368         __u32 width;                /* number of tiles in the x-axis */
369         __u32 height;               /* number of tiles in the y-axis */
370         __u32 fg;                   /* foreground color */
371         __u32 bg;                   /* background color */
372         __u32 length;               /* number of tiles to draw */
373         __u32 *indices;             /* array of indices to tile map */
374 };
375 
376 struct fb_tilecursor {
377         __u32 sx;                   /* cursor position in the x-axis */
378         __u32 sy;                   /* cursor position in the y-axis */
379         __u32 mode;                 /* 0 = erase, 1 = draw */
380         __u32 shape;                /* see FB_TILE_CURSOR_* */
381         __u32 fg;                   /* foreground color */
382         __u32 bg;                   /* background color */
383 };
384 
385 struct fb_tile_ops {
386         /* set tile characteristics */
387         void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map);
388 
389         /* all dimensions from hereon are in terms of tiles */
390 
391         /* move a rectangular region of tiles from one area to another*/
392         void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area);
393         /* fill a rectangular region with a tile */
394         void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect);
395         /* copy an array of tiles */
396         void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit);
397         /* cursor */
398         void (*fb_tilecursor)(struct fb_info *info,
399                               struct fb_tilecursor *cursor);
400         /* get maximum length of the tile map */
401         int (*fb_get_tilemax)(struct fb_info *info);
402 };
403 #endif /* CONFIG_FB_TILEBLITTING */
404 
405 /* FBINFO_* = fb_info.flags bit flags */
406 #define FBINFO_MODULE           0x0001  /* Low-level driver is a module */
407 #define FBINFO_HWACCEL_DISABLED 0x0002
408         /* When FBINFO_HWACCEL_DISABLED is set:
409          *  Hardware acceleration is turned off.  Software implementations
410          *  of required functions (copyarea(), fillrect(), and imageblit())
411          *  takes over; acceleration engine should be in a quiescent state */
412 
413 /* hints */
414 #define FBINFO_VIRTFB           0x0004 /* FB is System RAM, not device. */
415 #define FBINFO_PARTIAL_PAN_OK   0x0040 /* otw use pan only for double-buffering */
416 #define FBINFO_READS_FAST       0x0080 /* soft-copy faster than rendering */
417 
418 /* hardware supported ops */
419 /*  semantics: when a bit is set, it indicates that the operation is
420  *   accelerated by hardware.
421  *  required functions will still work even if the bit is not set.
422  *  optional functions may not even exist if the flag bit is not set.
423  */
424 #define FBINFO_HWACCEL_NONE             0x0000
425 #define FBINFO_HWACCEL_COPYAREA         0x0100 /* required */
426 #define FBINFO_HWACCEL_FILLRECT         0x0200 /* required */
427 #define FBINFO_HWACCEL_IMAGEBLIT        0x0400 /* required */
428 #define FBINFO_HWACCEL_ROTATE           0x0800 /* optional */
429 #define FBINFO_HWACCEL_XPAN             0x1000 /* optional */
430 #define FBINFO_HWACCEL_YPAN             0x2000 /* optional */
431 #define FBINFO_HWACCEL_YWRAP            0x4000 /* optional */
432 
433 #define FBINFO_MISC_USEREVENT          0x10000 /* event request
434                                                   from userspace */
435 #define FBINFO_MISC_TILEBLITTING       0x20000 /* use tile blitting */
436 
437 /* A driver may set this flag to indicate that it does want a set_par to be
438  * called every time when fbcon_switch is executed. The advantage is that with
439  * this flag set you can really be sure that set_par is always called before
440  * any of the functions dependent on the correct hardware state or altering
441  * that state, even if you are using some broken X releases. The disadvantage
442  * is that it introduces unwanted delays to every console switch if set_par
443  * is slow. It is a good idea to try this flag in the drivers initialization
444  * code whenever there is a bug report related to switching between X and the
445  * framebuffer console.
446  */
447 #define FBINFO_MISC_ALWAYS_SETPAR   0x40000
448 
449 /* where the fb is a firmware driver, and can be replaced with a proper one */
450 #define FBINFO_MISC_FIRMWARE        0x80000
451 /*
452  * Host and GPU endianness differ.
453  */
454 #define FBINFO_FOREIGN_ENDIAN   0x100000
455 /*
456  * Big endian math. This is the same flags as above, but with different
457  * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag
458  * and host endianness. Drivers should not use this flag.
459  */
460 #define FBINFO_BE_MATH  0x100000
461 
462 /* report to the VT layer that this fb driver can accept forced console
463    output like oopses */
464 #define FBINFO_CAN_FORCE_OUTPUT     0x200000
465 
466 struct fb_info {
467         atomic_t count;
468         int node;
469         int flags;
470         struct mutex lock;              /* Lock for open/release/ioctl funcs */
471         struct mutex mm_lock;           /* Lock for fb_mmap and smem_* fields */
472         struct fb_var_screeninfo var;   /* Current var */
473         struct fb_fix_screeninfo fix;   /* Current fix */
474         struct fb_monspecs monspecs;    /* Current Monitor specs */
475         struct work_struct queue;       /* Framebuffer event queue */
476         struct fb_pixmap pixmap;        /* Image hardware mapper */
477         struct fb_pixmap sprite;        /* Cursor hardware mapper */
478         struct fb_cmap cmap;            /* Current cmap */
479         struct list_head modelist;      /* mode list */
480         struct fb_videomode *mode;      /* current mode */
481 
482 #ifdef CONFIG_FB_BACKLIGHT
483         /* assigned backlight device */
484         /* set before framebuffer registration, 
485            remove after unregister */
486         struct backlight_device *bl_dev;
487 
488         /* Backlight level curve */
489         struct mutex bl_curve_mutex;    
490         u8 bl_curve[FB_BACKLIGHT_LEVELS];
491 #endif
492 #ifdef CONFIG_FB_DEFERRED_IO
493         struct delayed_work deferred_work;
494         struct fb_deferred_io *fbdefio;
495 #endif
496 
497         struct fb_ops *fbops;
498         struct device *device;          /* This is the parent */
499         struct device *dev;             /* This is this fb device */
500         int class_flag;                    /* private sysfs flags */
501 #ifdef CONFIG_FB_TILEBLITTING
502         struct fb_tile_ops *tileops;    /* Tile Blitting */
503 #endif
504         union {
505                 char __iomem *screen_base;      /* Virtual address */
506                 char *screen_buffer;
507         };
508         unsigned long screen_size;      /* Amount of ioremapped VRAM or 0 */ 
509         void *pseudo_palette;           /* Fake palette of 16 colors */ 
510 #define FBINFO_STATE_RUNNING    0
511 #define FBINFO_STATE_SUSPENDED  1
512         u32 state;                      /* Hardware state i.e suspend */
513         void *fbcon_par;                /* fbcon use-only private area */
514         /* From here on everything is device dependent */
515         void *par;
516         /* we need the PCI or similar aperture base/size not
517            smem_start/size as smem_start may just be an object
518            allocated inside the aperture so may not actually overlap */
519         struct apertures_struct {
520                 unsigned int count;
521                 struct aperture {
522                         resource_size_t base;
523                         resource_size_t size;
524                 } ranges[0];
525         } *apertures;
526 
527         bool skip_vt_switch; /* no VT switch on suspend/resume required */
528 };
529 
530 static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
531         struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
532                         + max_num * sizeof(struct aperture), GFP_KERNEL);
533         if (!a)
534                 return NULL;
535         a->count = max_num;
536         return a;
537 }
538 
539 #ifdef MODULE
540 #define FBINFO_DEFAULT  FBINFO_MODULE
541 #else
542 #define FBINFO_DEFAULT  0
543 #endif
544 
545 // This will go away
546 #define FBINFO_FLAG_MODULE      FBINFO_MODULE
547 #define FBINFO_FLAG_DEFAULT     FBINFO_DEFAULT
548 
549 /* This will go away
550  * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
551  * when it wants to turn the acceleration engine on.  This is
552  * really a separate operation, and should be modified via sysfs.
553  *  But for now, we leave it broken with the following define
554  */
555 #define STUPID_ACCELF_TEXT_SHIT
556 
557 // This will go away
558 #if defined(__sparc__)
559 
560 /* We map all of our framebuffers such that big-endian accesses
561  * are what we want, so the following is sufficient.
562  */
563 
564 // This will go away
565 #define fb_readb sbus_readb
566 #define fb_readw sbus_readw
567 #define fb_readl sbus_readl
568 #define fb_readq sbus_readq
569 #define fb_writeb sbus_writeb
570 #define fb_writew sbus_writew
571 #define fb_writel sbus_writel
572 #define fb_writeq sbus_writeq
573 #define fb_memset sbus_memset_io
574 #define fb_memcpy_fromfb sbus_memcpy_fromio
575 #define fb_memcpy_tofb sbus_memcpy_toio
576 
577 #elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || defined(__avr32__) || defined(__bfin__) || defined(__arm__)
578 
579 #define fb_readb __raw_readb
580 #define fb_readw __raw_readw
581 #define fb_readl __raw_readl
582 #define fb_readq __raw_readq
583 #define fb_writeb __raw_writeb
584 #define fb_writew __raw_writew
585 #define fb_writel __raw_writel
586 #define fb_writeq __raw_writeq
587 #define fb_memset memset_io
588 #define fb_memcpy_fromfb memcpy_fromio
589 #define fb_memcpy_tofb memcpy_toio
590 
591 #else
592 
593 #define fb_readb(addr) (*(volatile u8 *) (addr))
594 #define fb_readw(addr) (*(volatile u16 *) (addr))
595 #define fb_readl(addr) (*(volatile u32 *) (addr))
596 #define fb_readq(addr) (*(volatile u64 *) (addr))
597 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
598 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
599 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
600 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
601 #define fb_memset memset
602 #define fb_memcpy_fromfb memcpy
603 #define fb_memcpy_tofb memcpy
604 
605 #endif
606 
607 #define FB_LEFT_POS(p, bpp)          (fb_be_math(p) ? (32 - (bpp)) : 0)
608 #define FB_SHIFT_HIGH(p, val, bits)  (fb_be_math(p) ? (val) >> (bits) : \
609                                                       (val) << (bits))
610 #define FB_SHIFT_LOW(p, val, bits)   (fb_be_math(p) ? (val) << (bits) : \
611                                                       (val) >> (bits))
612 
613     /*
614      *  `Generic' versions of the frame buffer device operations
615      */
616 
617 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); 
618 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); 
619 extern int fb_blank(struct fb_info *info, int blank);
620 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); 
621 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); 
622 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
623 /*
624  * Drawing operations where framebuffer is in system RAM
625  */
626 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
627 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
628 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
629 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
630                            size_t count, loff_t *ppos);
631 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
632                             size_t count, loff_t *ppos);
633 
634 /* drivers/video/fbmem.c */
635 extern int register_framebuffer(struct fb_info *fb_info);
636 extern int unregister_framebuffer(struct fb_info *fb_info);
637 extern int unlink_framebuffer(struct fb_info *fb_info);
638 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
639                                            const char *name, bool primary);
640 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
641 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
642 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
643 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
644                                 u32 height, u32 shift_high, u32 shift_low, u32 mod);
645 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
646 extern void fb_set_suspend(struct fb_info *info, int state);
647 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
648                               struct fb_fix_screeninfo *fix);
649 extern int fb_get_options(const char *name, char **option);
650 extern int fb_new_modelist(struct fb_info *info);
651 
652 extern struct fb_info *registered_fb[FB_MAX];
653 extern int num_registered_fb;
654 extern struct class *fb_class;
655 
656 extern int lock_fb_info(struct fb_info *info);
657 
658 static inline void unlock_fb_info(struct fb_info *info)
659 {
660         mutex_unlock(&info->lock);
661 }
662 
663 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
664                                            u8 *src, u32 s_pitch, u32 height)
665 {
666         u32 i, j;
667 
668         d_pitch -= s_pitch;
669 
670         for (i = height; i--; ) {
671                 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
672                 for (j = 0; j < s_pitch; j++)
673                         *dst++ = *src++;
674                 dst += d_pitch;
675         }
676 }
677 
678 /* drivers/video/fb_defio.c */
679 extern void fb_deferred_io_init(struct fb_info *info);
680 extern void fb_deferred_io_open(struct fb_info *info,
681                                 struct inode *inode,
682                                 struct file *file);
683 extern void fb_deferred_io_cleanup(struct fb_info *info);
684 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
685                                 loff_t end, int datasync);
686 
687 static inline bool fb_be_math(struct fb_info *info)
688 {
689 #ifdef CONFIG_FB_FOREIGN_ENDIAN
690 #if defined(CONFIG_FB_BOTH_ENDIAN)
691         return info->flags & FBINFO_BE_MATH;
692 #elif defined(CONFIG_FB_BIG_ENDIAN)
693         return true;
694 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
695         return false;
696 #endif /* CONFIG_FB_BOTH_ENDIAN */
697 #else
698 #ifdef __BIG_ENDIAN
699         return true;
700 #else
701         return false;
702 #endif /* __BIG_ENDIAN */
703 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
704 }
705 
706 /* drivers/video/fbsysfs.c */
707 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
708 extern void framebuffer_release(struct fb_info *info);
709 extern int fb_init_device(struct fb_info *fb_info);
710 extern void fb_cleanup_device(struct fb_info *head);
711 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
712 
713 /* drivers/video/fbmon.c */
714 #define FB_MAXTIMINGS           0
715 #define FB_VSYNCTIMINGS         1
716 #define FB_HSYNCTIMINGS         2
717 #define FB_DCLKTIMINGS          3
718 #define FB_IGNOREMON            0x100
719 
720 #define FB_MODE_IS_UNKNOWN      0
721 #define FB_MODE_IS_DETAILED     1
722 #define FB_MODE_IS_STANDARD     2
723 #define FB_MODE_IS_VESA         4
724 #define FB_MODE_IS_CALCULATED   8
725 #define FB_MODE_IS_FIRST        16
726 #define FB_MODE_IS_FROM_VAR     32
727 
728 extern int fbmon_dpms(const struct fb_info *fb_info);
729 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
730                        struct fb_info *info);
731 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
732                             struct fb_info *info);
733 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
734 extern const unsigned char *fb_firmware_edid(struct device *device);
735 extern void fb_edid_to_monspecs(unsigned char *edid,
736                                 struct fb_monspecs *specs);
737 extern void fb_edid_add_monspecs(unsigned char *edid,
738                                  struct fb_monspecs *specs);
739 extern void fb_destroy_modedb(struct fb_videomode *modedb);
740 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
741 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
742 
743 extern int of_get_fb_videomode(struct device_node *np,
744                                struct fb_videomode *fb,
745                                int index);
746 extern int fb_videomode_from_videomode(const struct videomode *vm,
747                                        struct fb_videomode *fbmode);
748 
749 /* drivers/video/modedb.c */
750 #define VESA_MODEDB_SIZE 43
751 #define DMT_SIZE 0x50
752 
753 extern void fb_var_to_videomode(struct fb_videomode *mode,
754                                 const struct fb_var_screeninfo *var);
755 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
756                                 const struct fb_videomode *mode);
757 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
758                             const struct fb_videomode *mode2);
759 extern int fb_add_videomode(const struct fb_videomode *mode,
760                             struct list_head *head);
761 extern void fb_delete_videomode(const struct fb_videomode *mode,
762                                 struct list_head *head);
763 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
764                                                 struct list_head *head);
765 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
766                                                     struct list_head *head);
767 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
768                                                        struct list_head *head);
769 extern void fb_destroy_modelist(struct list_head *head);
770 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
771                                      struct list_head *head);
772 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
773                                                        struct list_head *head);
774 
775 /* drivers/video/fbcmap.c */
776 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
777 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
778 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
779 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
780 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
781 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
782 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
783 extern const struct fb_cmap *fb_default_cmap(int len);
784 extern void fb_invert_cmaps(void);
785 
786 struct fb_videomode {
787         const char *name;       /* optional */
788         u32 refresh;            /* optional */
789         u32 xres;
790         u32 yres;
791         u32 pixclock;
792         u32 left_margin;
793         u32 right_margin;
794         u32 upper_margin;
795         u32 lower_margin;
796         u32 hsync_len;
797         u32 vsync_len;
798         u32 sync;
799         u32 vmode;
800         u32 flag;
801 };
802 
803 struct dmt_videomode {
804         u32 dmt_id;
805         u32 std_2byte_code;
806         u32 cvt_3byte_code;
807         const struct fb_videomode *mode;
808 };
809 
810 extern const char *fb_mode_option;
811 extern const struct fb_videomode vesa_modes[];
812 extern const struct fb_videomode cea_modes[65];
813 extern const struct dmt_videomode dmt_modes[];
814 
815 struct fb_modelist {
816         struct list_head list;
817         struct fb_videomode mode;
818 };
819 
820 extern int fb_find_mode(struct fb_var_screeninfo *var,
821                         struct fb_info *info, const char *mode_option,
822                         const struct fb_videomode *db,
823                         unsigned int dbsize,
824                         const struct fb_videomode *default_mode,
825                         unsigned int default_bpp);
826 
827 /* Convenience logging macros */
828 #define fb_err(fb_info, fmt, ...)                                       \
829         pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
830 #define fb_notice(info, fmt, ...)                                       \
831         pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
832 #define fb_warn(fb_info, fmt, ...)                                      \
833         pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
834 #define fb_info(fb_info, fmt, ...)                                      \
835         pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
836 #define fb_dbg(fb_info, fmt, ...)                                       \
837         pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
838 
839 #endif /* _LINUX_FB_H */
840 

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