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
19struct vm_area_struct;
20struct fb_info;
21struct device;
22struct file;
23struct videomode;
24struct 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
52struct 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
63struct 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
93struct 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
102struct 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
114struct 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
167struct fb_event {
168 struct fb_info *info;
169 void *data;
170};
171
172struct fb_blit_caps {
173 u32 x;
174 u32 y;
175 u32 len;
176 u32 flags;
177};
178
179#ifdef CONFIG_FB_NOTIFY
180extern int fb_register_client(struct notifier_block *nb);
181extern int fb_unregister_client(struct notifier_block *nb);
182extern int fb_notifier_call_chain(unsigned long val, void *v);
183#else
184static inline int fb_register_client(struct notifier_block *nb)
185{
186 return 0;
187};
188
189static inline int fb_unregister_client(struct notifier_block *nb)
190{
191 return 0;
192};
193
194static 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
213struct 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
231struct 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
256struct 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
334struct 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
343struct 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
354struct 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
363struct 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
374struct 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
383struct 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 * Hide smem_start in the FBIOGET_FSCREENINFO IOCTL. This is used by modern DRM
461 * drivers to stop userspace from trying to share buffers behind the kernel's
462 * back. Instead dma-buf based buffer sharing should be used.
463 */
464#define FBINFO_HIDE_SMEM_START 0x200000
465
466
467struct fb_info {
468 atomic_t count;
469 int node;
470 int flags;
471 /*
472 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows
473 * a lcd is not mounted upright and fbcon should rotate to compensate.
474 */
475 int fbcon_rotate_hint;
476 struct mutex lock; /* Lock for open/release/ioctl funcs */
477 struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields */
478 struct fb_var_screeninfo var; /* Current var */
479 struct fb_fix_screeninfo fix; /* Current fix */
480 struct fb_monspecs monspecs; /* Current Monitor specs */
481 struct work_struct queue; /* Framebuffer event queue */
482 struct fb_pixmap pixmap; /* Image hardware mapper */
483 struct fb_pixmap sprite; /* Cursor hardware mapper */
484 struct fb_cmap cmap; /* Current cmap */
485 struct list_head modelist; /* mode list */
486 struct fb_videomode *mode; /* current mode */
487
488#if IS_ENABLED(CONFIG_FB_BACKLIGHT)
489 /* assigned backlight device */
490 /* set before framebuffer registration,
491 remove after unregister */
492 struct backlight_device *bl_dev;
493
494 /* Backlight level curve */
495 struct mutex bl_curve_mutex;
496 u8 bl_curve[FB_BACKLIGHT_LEVELS];
497#endif
498#ifdef CONFIG_FB_DEFERRED_IO
499 struct delayed_work deferred_work;
500 struct fb_deferred_io *fbdefio;
501#endif
502
503 struct fb_ops *fbops;
504 struct device *device; /* This is the parent */
505 struct device *dev; /* This is this fb device */
506 int class_flag; /* private sysfs flags */
507#ifdef CONFIG_FB_TILEBLITTING
508 struct fb_tile_ops *tileops; /* Tile Blitting */
509#endif
510 union {
511 char __iomem *screen_base; /* Virtual address */
512 char *screen_buffer;
513 };
514 unsigned long screen_size; /* Amount of ioremapped VRAM or 0 */
515 void *pseudo_palette; /* Fake palette of 16 colors */
516#define FBINFO_STATE_RUNNING 0
517#define FBINFO_STATE_SUSPENDED 1
518 u32 state; /* Hardware state i.e suspend */
519 void *fbcon_par; /* fbcon use-only private area */
520 /* From here on everything is device dependent */
521 void *par;
522 /* we need the PCI or similar aperture base/size not
523 smem_start/size as smem_start may just be an object
524 allocated inside the aperture so may not actually overlap */
525 struct apertures_struct {
526 unsigned int count;
527 struct aperture {
528 resource_size_t base;
529 resource_size_t size;
530 } ranges[0];
531 } *apertures;
532
533 bool skip_vt_switch; /* no VT switch on suspend/resume required */
534};
535
536static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
537 struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
538 + max_num * sizeof(struct aperture), GFP_KERNEL);
539 if (!a)
540 return NULL;
541 a->count = max_num;
542 return a;
543}
544
545#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT
546
547/* This will go away
548 * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags
549 * when it wants to turn the acceleration engine on. This is
550 * really a separate operation, and should be modified via sysfs.
551 * But for now, we leave it broken with the following define
552 */
553#define STUPID_ACCELF_TEXT_SHIT
554
555// This will go away
556#if defined(__sparc__)
557
558/* We map all of our framebuffers such that big-endian accesses
559 * are what we want, so the following is sufficient.
560 */
561
562// This will go away
563#define fb_readb sbus_readb
564#define fb_readw sbus_readw
565#define fb_readl sbus_readl
566#define fb_readq sbus_readq
567#define fb_writeb sbus_writeb
568#define fb_writew sbus_writew
569#define fb_writel sbus_writel
570#define fb_writeq sbus_writeq
571#define fb_memset sbus_memset_io
572#define fb_memcpy_fromfb sbus_memcpy_fromio
573#define fb_memcpy_tofb sbus_memcpy_toio
574
575#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || \
576 defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || \
577 defined(__arm__) || defined(__aarch64__)
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
617extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var);
618extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var);
619extern int fb_blank(struct fb_info *info, int blank);
620extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
621extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area);
622extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);
623/*
624 * Drawing operations where framebuffer is in system RAM
625 */
626extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);
627extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);
628extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);
629extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf,
630 size_t count, loff_t *ppos);
631extern 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 */
635extern int register_framebuffer(struct fb_info *fb_info);
636extern int unregister_framebuffer(struct fb_info *fb_info);
637extern int unlink_framebuffer(struct fb_info *fb_info);
638extern int remove_conflicting_pci_framebuffers(struct pci_dev *pdev, int res_id,
639 const char *name);
640extern int remove_conflicting_framebuffers(struct apertures_struct *a,
641 const char *name, bool primary);
642extern int (struct fb_info *fb_info, int rotate);
643extern int (struct fb_info *fb_info, int rotate);
644extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);
645extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx,
646 u32 height, u32 shift_high, u32 shift_low, u32 mod);
647extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);
648extern void fb_set_suspend(struct fb_info *info, int state);
649extern int fb_get_color_depth(struct fb_var_screeninfo *var,
650 struct fb_fix_screeninfo *fix);
651extern int fb_get_options(const char *name, char **option);
652extern int fb_new_modelist(struct fb_info *info);
653
654extern struct fb_info *registered_fb[FB_MAX];
655extern int num_registered_fb;
656extern bool ;
657extern struct class *fb_class;
658
659#define for_each_registered_fb(i) \
660 for (i = 0; i < FB_MAX; i++) \
661 if (!registered_fb[i]) {} else
662
663extern int lock_fb_info(struct fb_info *info);
664
665static inline void unlock_fb_info(struct fb_info *info)
666{
667 mutex_unlock(&info->lock);
668}
669
670static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch,
671 u8 *src, u32 s_pitch, u32 height)
672{
673 u32 i, j;
674
675 d_pitch -= s_pitch;
676
677 for (i = height; i--; ) {
678 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
679 for (j = 0; j < s_pitch; j++)
680 *dst++ = *src++;
681 dst += d_pitch;
682 }
683}
684
685/* drivers/video/fb_defio.c */
686int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma);
687extern void fb_deferred_io_init(struct fb_info *info);
688extern void fb_deferred_io_open(struct fb_info *info,
689 struct inode *inode,
690 struct file *file);
691extern void fb_deferred_io_cleanup(struct fb_info *info);
692extern int fb_deferred_io_fsync(struct file *file, loff_t start,
693 loff_t end, int datasync);
694
695static inline bool fb_be_math(struct fb_info *info)
696{
697#ifdef CONFIG_FB_FOREIGN_ENDIAN
698#if defined(CONFIG_FB_BOTH_ENDIAN)
699 return info->flags & FBINFO_BE_MATH;
700#elif defined(CONFIG_FB_BIG_ENDIAN)
701 return true;
702#elif defined(CONFIG_FB_LITTLE_ENDIAN)
703 return false;
704#endif /* CONFIG_FB_BOTH_ENDIAN */
705#else
706#ifdef __BIG_ENDIAN
707 return true;
708#else
709 return false;
710#endif /* __BIG_ENDIAN */
711#endif /* CONFIG_FB_FOREIGN_ENDIAN */
712}
713
714/* drivers/video/fbsysfs.c */
715extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);
716extern void framebuffer_release(struct fb_info *info);
717extern int fb_init_device(struct fb_info *fb_info);
718extern void fb_cleanup_device(struct fb_info *head);
719extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);
720
721/* drivers/video/fbmon.c */
722#define FB_MAXTIMINGS 0
723#define FB_VSYNCTIMINGS 1
724#define FB_HSYNCTIMINGS 2
725#define FB_DCLKTIMINGS 3
726#define FB_IGNOREMON 0x100
727
728#define FB_MODE_IS_UNKNOWN 0
729#define FB_MODE_IS_DETAILED 1
730#define FB_MODE_IS_STANDARD 2
731#define FB_MODE_IS_VESA 4
732#define FB_MODE_IS_CALCULATED 8
733#define FB_MODE_IS_FIRST 16
734#define FB_MODE_IS_FROM_VAR 32
735
736extern int fbmon_dpms(const struct fb_info *fb_info);
737extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var,
738 struct fb_info *info);
739extern int fb_validate_mode(const struct fb_var_screeninfo *var,
740 struct fb_info *info);
741extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
742extern const unsigned char *fb_firmware_edid(struct device *device);
743extern void fb_edid_to_monspecs(unsigned char *edid,
744 struct fb_monspecs *specs);
745extern void fb_edid_add_monspecs(unsigned char *edid,
746 struct fb_monspecs *specs);
747extern void fb_destroy_modedb(struct fb_videomode *modedb);
748extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
749extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
750
751extern int of_get_fb_videomode(struct device_node *np,
752 struct fb_videomode *fb,
753 int index);
754extern int fb_videomode_from_videomode(const struct videomode *vm,
755 struct fb_videomode *fbmode);
756
757/* drivers/video/modedb.c */
758#define VESA_MODEDB_SIZE 43
759#define DMT_SIZE 0x50
760
761extern void fb_var_to_videomode(struct fb_videomode *mode,
762 const struct fb_var_screeninfo *var);
763extern void fb_videomode_to_var(struct fb_var_screeninfo *var,
764 const struct fb_videomode *mode);
765extern int fb_mode_is_equal(const struct fb_videomode *mode1,
766 const struct fb_videomode *mode2);
767extern int fb_add_videomode(const struct fb_videomode *mode,
768 struct list_head *head);
769extern void fb_delete_videomode(const struct fb_videomode *mode,
770 struct list_head *head);
771extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var,
772 struct list_head *head);
773extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var,
774 struct list_head *head);
775extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode,
776 struct list_head *head);
777extern void fb_destroy_modelist(struct list_head *head);
778extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num,
779 struct list_head *head);
780extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs,
781 struct list_head *head);
782
783/* drivers/video/fbcmap.c */
784extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);
785extern int fb_alloc_cmap_gfp(struct fb_cmap *cmap, int len, int transp, gfp_t flags);
786extern void fb_dealloc_cmap(struct fb_cmap *cmap);
787extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);
788extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);
789extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);
790extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);
791extern const struct fb_cmap *fb_default_cmap(int len);
792extern void fb_invert_cmaps(void);
793
794struct fb_videomode {
795 const char *name; /* optional */
796 u32 refresh; /* optional */
797 u32 xres;
798 u32 yres;
799 u32 pixclock;
800 u32 left_margin;
801 u32 right_margin;
802 u32 upper_margin;
803 u32 lower_margin;
804 u32 hsync_len;
805 u32 vsync_len;
806 u32 sync;
807 u32 vmode;
808 u32 flag;
809};
810
811struct dmt_videomode {
812 u32 dmt_id;
813 u32 std_2byte_code;
814 u32 cvt_3byte_code;
815 const struct fb_videomode *mode;
816};
817
818extern const char *fb_mode_option;
819extern const struct fb_videomode vesa_modes[];
820extern const struct fb_videomode cea_modes[65];
821extern const struct dmt_videomode dmt_modes[];
822
823struct fb_modelist {
824 struct list_head list;
825 struct fb_videomode mode;
826};
827
828extern int fb_find_mode(struct fb_var_screeninfo *var,
829 struct fb_info *info, const char *mode_option,
830 const struct fb_videomode *db,
831 unsigned int dbsize,
832 const struct fb_videomode *default_mode,
833 unsigned int default_bpp);
834
835/* Convenience logging macros */
836#define fb_err(fb_info, fmt, ...) \
837 pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
838#define fb_notice(info, fmt, ...) \
839 pr_notice("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
840#define fb_warn(fb_info, fmt, ...) \
841 pr_warn("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
842#define fb_info(fb_info, fmt, ...) \
843 pr_info("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
844#define fb_dbg(fb_info, fmt, ...) \
845 pr_debug("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
846
847#endif /* _LINUX_FB_H */
848