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 being 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 occurred */
163 #define FB_EARLY_EVENT_BLANK 0x10
164 /* A hardware display blank revert early change occurred */
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
fb_register_client(struct notifier_block * nb)184 static inline int fb_register_client(struct notifier_block *nb)
185 {
186 return 0;
187 };
188
fb_unregister_client(struct notifier_block * nb)189 static inline int fb_unregister_client(struct notifier_block *nb)
190 {
191 return 0;
192 };
193
fb_notifier_call_chain(unsigned long val,void * v)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
alloc_apertures(unsigned int max_num)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(__arm__) || defined(__aarch64__)
575
576 #define fb_readb __raw_readb
577 #define fb_readw __raw_readw
578 #define fb_readl __raw_readl
579 #define fb_readq __raw_readq
580 #define fb_writeb __raw_writeb
581 #define fb_writew __raw_writew
582 #define fb_writel __raw_writel
583 #define fb_writeq __raw_writeq
584 #define fb_memset memset_io
585 #define fb_memcpy_fromfb memcpy_fromio
586 #define fb_memcpy_tofb memcpy_toio
587
588 #else
589
590 #define fb_readb(addr) (*(volatile u8 *) (addr))
591 #define fb_readw(addr) (*(volatile u16 *) (addr))
592 #define fb_readl(addr) (*(volatile u32 *) (addr))
593 #define fb_readq(addr) (*(volatile u64 *) (addr))
594 #define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))
595 #define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))
596 #define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))
597 #define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))
598 #define fb_memset memset
599 #define fb_memcpy_fromfb memcpy
600 #define fb_memcpy_tofb memcpy
601
602 #endif
603
604 #define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)
605 #define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \
606 (val) << (bits))
607 #define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \
608 (val) >> (bits))
609
610 /*
611 * `Generic' versions of the frame buffer device operations
612 */
613
614 extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
615 extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
616 extern int fb_blank(struct fb_info *info, int blank);
617 extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
618 extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
619 extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
620 /*
621 * Drawing operations where framebuffer is in system RAM
622 */
623 extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
624 extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
625 extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
626 extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
627 size_t count, loff_t *ppos);
628 extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf,
629 size_t count, loff_t *ppos);
630
631 /* drivers/video/fbmem.c */
632 extern int register_framebuffer(struct fb_info *fb_info);
633 extern int unregister_framebuffer(struct fb_info *fb_info);
634 extern int unlink_framebuffer(struct fb_info *fb_info);
635 extern int remove_conflicting_framebuffers(struct apertures_struct *a,
636 const char *name, bool primary);
637 extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);
638 extern int fb_show_logo(struct fb_info *fb_info, int rotate);
639 extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
640 extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
641 u32 height, u32 shift_high, u32 shift_low, u32 mod);
642 extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
643 extern void fb_set_suspend(struct fb_info *info, int state);
644 extern int fb_get_color_depth(struct fb_var_screeninfo *var,
645 struct fb_fix_screeninfo *fix);
646 extern int fb_get_options(const char *name, char **option);
647 extern int fb_new_modelist(struct fb_info *info);
648
649 extern struct fb_info *registered_fb[FB_MAX];
650 extern int num_registered_fb;
651 extern struct class *fb_class;
652
653 #define for_each_registered_fb(i) \
654 for (i = 0; i < FB_MAX; i++) \
655 if (!registered_fb[i]) {} else
656
657 extern int lock_fb_info(struct fb_info *info);
658
unlock_fb_info(struct fb_info * info)659 static inline void unlock_fb_info(struct fb_info *info)
660 {
661 mutex_unlock(&info->lock);
662 }
663
__fb_pad_aligned_buffer(u8 * dst,u32 d_pitch,u8 * src,u32 s_pitch,u32 height)664 static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
665 u8 *src, u32 s_pitch, u32 height)
666 {
667 u32 i, j;
668
669 d_pitch -= s_pitch;
670
671 for (i = height; i--; ) {
672 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
673 for (j = 0; j < s_pitch; j++)
674 *dst++ = *src++;
675 dst += d_pitch;
676 }
677 }
678
679 /* drivers/video/fb_defio.c */
680 int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
681 extern void fb_deferred_io_init(struct fb_info *info);
682 extern void fb_deferred_io_open(struct fb_info *info,
683 struct inode *inode,
684 struct file *file);
685 extern void fb_deferred_io_cleanup(struct fb_info *info);
686 extern int fb_deferred_io_fsync(struct file *file, loff_t start,
687 loff_t end, int datasync);
688
fb_be_math(struct fb_info * info)689 static inline bool fb_be_math(struct fb_info *info)
690 {
691 #ifdef CONFIG_FB_FOREIGN_ENDIAN
692 #if defined(CONFIG_FB_BOTH_ENDIAN)
693 return info->flags & FBINFO_BE_MATH;
694 #elif defined(CONFIG_FB_BIG_ENDIAN)
695 return true;
696 #elif defined(CONFIG_FB_LITTLE_ENDIAN)
697 return false;
698 #endif /* CONFIG_FB_BOTH_ENDIAN */
699 #else
700 #ifdef __BIG_ENDIAN
701 return true;
702 #else
703 return false;
704 #endif /* __BIG_ENDIAN */
705 #endif /* CONFIG_FB_FOREIGN_ENDIAN */
706 }
707
708 /* drivers/video/fbsysfs.c */
709 extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
710 extern void framebuffer_release(struct fb_info *info);
711 extern int fb_init_device(struct fb_info *fb_info);
712 extern void fb_cleanup_device(struct fb_info *head);
713 extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
714
715 /* drivers/video/fbmon.c */
716 #define FB_MAXTIMINGS 0
717 #define FB_VSYNCTIMINGS 1
718 #define FB_HSYNCTIMINGS 2
719 #define FB_DCLKTIMINGS 3
720 #define FB_IGNOREMON 0x100
721
722 #define FB_MODE_IS_UNKNOWN 0
723 #define FB_MODE_IS_DETAILED 1
724 #define FB_MODE_IS_STANDARD 2
725 #define FB_MODE_IS_VESA 4
726 #define FB_MODE_IS_CALCULATED 8
727 #define FB_MODE_IS_FIRST 16
728 #define FB_MODE_IS_FROM_VAR 32
729
730 extern int fbmon_dpms(const struct fb_info *fb_info);
731 extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
732 struct fb_info *info);
733 extern int fb_validate_mode(const struct fb_var_screeninfo *var,
734 struct fb_info *info);
735 extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
736 extern const unsigned char *fb_firmware_edid(struct device *device);
737 extern void fb_edid_to_monspecs(unsigned char *edid,
738 struct fb_monspecs *specs);
739 extern void fb_edid_add_monspecs(unsigned char *edid,
740 struct fb_monspecs *specs);
741 extern void fb_destroy_modedb(struct fb_videomode *modedb);
742 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
743 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
744
745 extern int of_get_fb_videomode(struct device_node *np,
746 struct fb_videomode *fb,
747 int index);
748 extern int fb_videomode_from_videomode(const struct videomode *vm,
749 struct fb_videomode *fbmode);
750
751 /* drivers/video/modedb.c */
752 #define VESA_MODEDB_SIZE 43
753 #define DMT_SIZE 0x50
754
755 extern void fb_var_to_videomode(struct fb_videomode *mode,
756 const struct fb_var_screeninfo *var);
757 extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
758 const struct fb_videomode *mode);
759 extern int fb_mode_is_equal(const struct fb_videomode *mode1,
760 const struct fb_videomode *mode2);
761 extern int fb_add_videomode(const struct fb_videomode *mode,
762 struct list_head *head);
763 extern void fb_delete_videomode(const struct fb_videomode *mode,
764 struct list_head *head);
765 extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
766 struct list_head *head);
767 extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
768 struct list_head *head);
769 extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
770 struct list_head *head);
771 extern void fb_destroy_modelist(struct list_head *head);
772 extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
773 struct list_head *head);
774 extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
775 struct list_head *head);
776
777 /* drivers/video/fbcmap.c */
778 extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
779 extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
780 extern void fb_dealloc_cmap(struct fb_cmap *cmap);
781 extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
782 extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
783 extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
784 extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
785 extern const struct fb_cmap *fb_default_cmap(int len);
786 extern void fb_invert_cmaps(void);
787
788 struct fb_videomode {
789 const char *name; /* optional */
790 u32 refresh; /* optional */
791 u32 xres;
792 u32 yres;
793 u32 pixclock;
794 u32 left_margin;
795 u32 right_margin;
796 u32 upper_margin;
797 u32 lower_margin;
798 u32 hsync_len;
799 u32 vsync_len;
800 u32 sync;
801 u32 vmode;
802 u32 flag;
803 };
804
805 struct dmt_videomode {
806 u32 dmt_id;
807 u32 std_2byte_code;
808 u32 cvt_3byte_code;
809 const struct fb_videomode *mode;
810 };
811
812 extern const char *fb_mode_option;
813 extern const struct fb_videomode vesa_modes[];
814 extern const struct fb_videomode cea_modes[65];
815 extern const struct dmt_videomode dmt_modes[];
816
817 struct fb_modelist {
818 struct list_head list;
819 struct fb_videomode mode;
820 };
821
822 extern int fb_find_mode(struct fb_var_screeninfo *var,
823 struct fb_info *info, const char *mode_option,
824 const struct fb_videomode *db,
825 unsigned int dbsize,
826 const struct fb_videomode *default_mode,
827 unsigned int default_bpp);
828
829 /* Convenience logging macros */
830 #define fb_err(fb_info, fmt, ...) \
831 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
832 #define fb_notice(info, fmt, ...) \
833 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
834 #define fb_warn(fb_info, fmt, ...) \
835 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
836 #define fb_info(fb_info, fmt, ...) \
837 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
838 #define fb_dbg(fb_info, fmt, ...) \
839 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
840
841 #endif /* _LINUX_FB_H */
842
