2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
14 #include <linux/module.h>
16 #include <linux/compat.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/smp_lock.h>
20 #include <linux/kernel.h>
21 #include <linux/major.h>
22 #include <linux/slab.h>
24 #include <linux/mman.h>
26 #include <linux/init.h>
27 #include <linux/linux_logo.h>
28 #include <linux/proc_fs.h>
29 #include <linux/console.h>
31 #include <linux/kmod.h>
33 #include <linux/err.h>
34 #include <linux/device.h>
35 #include <linux/efi.h>
42 * Frame buffer device initialization and setup routines
45 #define FBPIXMAPSIZE (1024 * 8)
47 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
48 int num_registered_fb __read_mostly
;
54 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
55 struct fb_fix_screeninfo
*fix
)
59 if (fix
->visual
== FB_VISUAL_MONO01
||
60 fix
->visual
== FB_VISUAL_MONO10
)
63 if (var
->green
.length
== var
->blue
.length
&&
64 var
->green
.length
== var
->red
.length
&&
65 var
->green
.offset
== var
->blue
.offset
&&
66 var
->green
.offset
== var
->red
.offset
)
67 depth
= var
->green
.length
;
69 depth
= var
->green
.length
+ var
->red
.length
+
75 EXPORT_SYMBOL(fb_get_color_depth
);
78 * Data padding functions.
80 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
82 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
84 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
86 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
87 u32 shift_high
, u32 shift_low
, u32 mod
)
89 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
92 for (i
= height
; i
--; ) {
93 for (j
= 0; j
< idx
; j
++) {
96 tmp
|= *src
>> shift_low
;
98 tmp
= *src
<< shift_high
;
104 tmp
|= *src
>> shift_low
;
106 if (shift_high
< mod
) {
107 tmp
= *src
<< shift_high
;
114 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
117 * we need to lock this section since fb_cursor
118 * may use fb_imageblit()
120 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
122 u32 align
= buf
->buf_align
- 1, offset
;
123 char *addr
= buf
->addr
;
125 /* If IO mapped, we need to sync before access, no sharing of
128 if (buf
->flags
& FB_PIXMAP_IO
) {
129 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
130 info
->fbops
->fb_sync(info
);
134 /* See if we fit in the remaining pixmap space */
135 offset
= buf
->offset
+ align
;
137 if (offset
+ size
> buf
->size
) {
138 /* We do not fit. In order to be able to re-use the buffer,
139 * we must ensure no asynchronous DMA'ing or whatever operation
140 * is in progress, we sync for that.
142 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
143 info
->fbops
->fb_sync(info
);
146 buf
->offset
= offset
+ size
;
154 static inline unsigned safe_shift(unsigned d
, int n
)
156 return n
< 0 ? d
>> -n
: d
<< n
;
159 static void fb_set_logocmap(struct fb_info
*info
,
160 const struct linux_logo
*logo
)
162 struct fb_cmap palette_cmap
;
163 u16 palette_green
[16];
164 u16 palette_blue
[16];
167 const unsigned char *clut
= logo
->clut
;
169 palette_cmap
.start
= 0;
170 palette_cmap
.len
= 16;
171 palette_cmap
.red
= palette_red
;
172 palette_cmap
.green
= palette_green
;
173 palette_cmap
.blue
= palette_blue
;
174 palette_cmap
.transp
= NULL
;
176 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
177 n
= logo
->clutsize
- i
;
178 /* palette_cmap provides space for only 16 colors at once */
181 palette_cmap
.start
= 32 + i
;
182 palette_cmap
.len
= n
;
183 for (j
= 0; j
< n
; ++j
) {
184 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
185 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
186 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
189 fb_set_cmap(&palette_cmap
, info
);
193 static void fb_set_logo_truepalette(struct fb_info
*info
,
194 const struct linux_logo
*logo
,
197 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
198 unsigned char redmask
, greenmask
, bluemask
;
199 int redshift
, greenshift
, blueshift
;
201 const unsigned char *clut
= logo
->clut
;
204 * We have to create a temporary palette since console palette is only
207 /* Bug: Doesn't obey msb_right ... (who needs that?) */
208 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
209 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
210 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
211 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
212 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
213 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
215 for ( i
= 0; i
< logo
->clutsize
; i
++) {
216 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
217 safe_shift((clut
[1] & greenmask
), greenshift
) |
218 safe_shift((clut
[2] & bluemask
), blueshift
));
223 static void fb_set_logo_directpalette(struct fb_info
*info
,
224 const struct linux_logo
*logo
,
227 int redshift
, greenshift
, blueshift
;
230 redshift
= info
->var
.red
.offset
;
231 greenshift
= info
->var
.green
.offset
;
232 blueshift
= info
->var
.blue
.offset
;
234 for (i
= 32; i
< logo
->clutsize
; i
++)
235 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
238 static void fb_set_logo(struct fb_info
*info
,
239 const struct linux_logo
*logo
, u8
*dst
,
243 const u8
*src
= logo
->data
;
244 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
247 if (fb_get_color_depth(&info
->var
, &info
->fix
) == 3)
250 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
251 info
->fix
.visual
== FB_VISUAL_MONO10
)
252 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
256 for (i
= 0; i
< logo
->height
; i
++)
257 for (j
= 0; j
< logo
->width
; src
++) {
260 if (j
< logo
->width
) {
261 *dst
++ = *src
& 0x0f;
267 for (i
= 0; i
< logo
->height
; i
++) {
268 for (j
= 0; j
< logo
->width
; src
++) {
270 for (k
= 7; k
>= 0; k
--) {
271 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
281 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
282 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
283 * the visual format and color depth of the framebuffer, the DAC, the
284 * pseudo_palette, and the logo data will be adjusted accordingly.
286 * Case 1 - linux_logo_clut224:
287 * Color exceeds the number of console colors (16), thus we set the hardware DAC
288 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
290 * For visuals that require color info from the pseudo_palette, we also construct
291 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
294 * Case 2 - linux_logo_vga16:
295 * The number of colors just matches the console colors, thus there is no need
296 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
297 * each byte contains color information for two pixels (upper and lower nibble).
298 * To be consistent with fb_imageblit() usage, we therefore separate the two
299 * nibbles into separate bytes. The "depth" flag will be set to 4.
301 * Case 3 - linux_logo_mono:
302 * This is similar with Case 2. Each byte contains information for 8 pixels.
303 * We isolate each bit and expand each into a byte. The "depth" flag will
306 static struct logo_data
{
308 int needs_directpalette
;
309 int needs_truepalette
;
311 const struct linux_logo
*logo
;
312 } fb_logo __read_mostly
;
314 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
316 u32 size
= width
* height
, i
;
320 for (i
= size
; i
--; )
324 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
326 int i
, j
, h
= height
- 1;
328 for (i
= 0; i
< height
; i
++)
329 for (j
= 0; j
< width
; j
++)
330 out
[height
* j
+ h
- i
] = *in
++;
333 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
335 int i
, j
, w
= width
- 1;
337 for (i
= 0; i
< height
; i
++)
338 for (j
= 0; j
< width
; j
++)
339 out
[height
* (w
- j
) + i
] = *in
++;
342 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
343 struct fb_image
*image
, int rotate
)
347 if (rotate
== FB_ROTATE_UD
) {
348 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
350 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
351 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
352 } else if (rotate
== FB_ROTATE_CW
) {
353 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
356 image
->width
= image
->height
;
359 image
->dy
= image
->dx
;
360 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
361 } else if (rotate
== FB_ROTATE_CCW
) {
362 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
365 image
->width
= image
->height
;
368 image
->dx
= image
->dy
;
369 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
375 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
376 int rotate
, unsigned int num
)
380 if (rotate
== FB_ROTATE_UR
) {
382 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
384 info
->fbops
->fb_imageblit(info
, image
);
385 image
->dx
+= image
->width
+ 8;
387 } else if (rotate
== FB_ROTATE_UD
) {
388 for (x
= 0; x
< num
&& image
->dx
>= 0; x
++) {
389 info
->fbops
->fb_imageblit(info
, image
);
390 image
->dx
-= image
->width
+ 8;
392 } else if (rotate
== FB_ROTATE_CW
) {
394 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
396 info
->fbops
->fb_imageblit(info
, image
);
397 image
->dy
+= image
->height
+ 8;
399 } else if (rotate
== FB_ROTATE_CCW
) {
400 for (x
= 0; x
< num
&& image
->dy
>= 0; x
++) {
401 info
->fbops
->fb_imageblit(info
, image
);
402 image
->dy
-= image
->height
+ 8;
407 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
408 const struct linux_logo
*logo
, int y
,
411 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
412 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
413 struct fb_image image
;
415 /* Return if the frame buffer is not mapped or suspended */
416 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
417 info
->flags
& FBINFO_MODULE
)
421 image
.data
= logo
->data
;
423 if (fb_logo
.needs_cmapreset
)
424 fb_set_logocmap(info
, logo
);
426 if (fb_logo
.needs_truepalette
||
427 fb_logo
.needs_directpalette
) {
428 palette
= kmalloc(256 * 4, GFP_KERNEL
);
432 if (fb_logo
.needs_truepalette
)
433 fb_set_logo_truepalette(info
, logo
, palette
);
435 fb_set_logo_directpalette(info
, logo
, palette
);
437 saved_pseudo_palette
= info
->pseudo_palette
;
438 info
->pseudo_palette
= palette
;
441 if (fb_logo
.depth
<= 4) {
442 logo_new
= kmalloc(logo
->width
* logo
->height
, GFP_KERNEL
);
443 if (logo_new
== NULL
) {
445 if (saved_pseudo_palette
)
446 info
->pseudo_palette
= saved_pseudo_palette
;
449 image
.data
= logo_new
;
450 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
455 image
.width
= logo
->width
;
456 image
.height
= logo
->height
;
459 logo_rotate
= kmalloc(logo
->width
*
460 logo
->height
, GFP_KERNEL
);
462 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
465 fb_do_show_logo(info
, &image
, rotate
, n
);
468 if (saved_pseudo_palette
!= NULL
)
469 info
->pseudo_palette
= saved_pseudo_palette
;
476 #ifdef CONFIG_FB_LOGO_EXTRA
478 #define FB_LOGO_EX_NUM_MAX 10
479 static struct logo_data_extra
{
480 const struct linux_logo
*logo
;
482 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
483 static unsigned int fb_logo_ex_num
;
485 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
487 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
490 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
491 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
495 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
500 /* FIXME: logo_ex supports only truecolor fb. */
501 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
504 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
505 height
+= fb_logo_ex
[i
].logo
->height
;
507 height
-= fb_logo_ex
[i
].logo
->height
;
515 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
519 for (i
= 0; i
< fb_logo_ex_num
; i
++)
520 y
+= fb_show_logo_line(info
, rotate
,
521 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
526 #else /* !CONFIG_FB_LOGO_EXTRA */
528 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
535 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
540 #endif /* CONFIG_FB_LOGO_EXTRA */
543 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
545 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
548 memset(&fb_logo
, 0, sizeof(struct logo_data
));
550 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
551 info
->flags
& FBINFO_MODULE
)
554 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
555 depth
= info
->var
.blue
.length
;
556 if (info
->var
.red
.length
< depth
)
557 depth
= info
->var
.red
.length
;
558 if (info
->var
.green
.length
< depth
)
559 depth
= info
->var
.green
.length
;
562 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
563 /* assume console colormap */
568 switch (info
->fix
.visual
) {
569 case FB_VISUAL_TRUECOLOR
:
570 fb_logo
.needs_truepalette
= 1;
572 case FB_VISUAL_DIRECTCOLOR
:
573 fb_logo
.needs_directpalette
= 1;
574 fb_logo
.needs_cmapreset
= 1;
576 case FB_VISUAL_PSEUDOCOLOR
:
577 fb_logo
.needs_cmapreset
= 1;
582 /* Return if no suitable logo was found */
583 fb_logo
.logo
= fb_find_logo(depth
);
589 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
590 yres
= info
->var
.yres
;
592 yres
= info
->var
.xres
;
594 if (fb_logo
.logo
->height
> yres
) {
599 /* What depth we asked for might be different from what we get */
600 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
602 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
607 return fb_prepare_extra_logos(info
, fb_logo
.logo
->height
, yres
);
610 int fb_show_logo(struct fb_info
*info
, int rotate
)
614 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
616 y
= fb_show_extra_logos(info
, y
, rotate
);
621 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
622 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
623 #endif /* CONFIG_LOGO */
625 static int fbmem_read_proc(char *buf
, char **start
, off_t offset
,
626 int len
, int *eof
, void *private)
632 for (fi
= registered_fb
; fi
< ®istered_fb
[FB_MAX
] && clen
< 4000;
635 clen
+= sprintf(buf
+ clen
, "%d %s\n",
638 *start
= buf
+ offset
;
643 return clen
< len
? clen
: len
;
647 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
649 unsigned long p
= *ppos
;
650 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
651 int fbidx
= iminor(inode
);
652 struct fb_info
*info
= registered_fb
[fbidx
];
655 int c
, i
, cnt
= 0, err
= 0;
656 unsigned long total_size
;
658 if (!info
|| ! info
->screen_base
)
661 if (info
->state
!= FBINFO_STATE_RUNNING
)
664 if (info
->fbops
->fb_read
)
665 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
667 total_size
= info
->screen_size
;
670 total_size
= info
->fix
.smem_len
;
675 if (count
>= total_size
)
678 if (count
+ p
> total_size
)
679 count
= total_size
- p
;
681 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
686 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
688 if (info
->fbops
->fb_sync
)
689 info
->fbops
->fb_sync(info
);
692 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
694 for (i
= c
>> 2; i
--; )
695 *dst
++ = fb_readl(src
++);
697 u8
*dst8
= (u8
*) dst
;
698 u8 __iomem
*src8
= (u8 __iomem
*) src
;
700 for (i
= c
& 3; i
--;)
701 *dst8
++ = fb_readb(src8
++);
703 src
= (u32 __iomem
*) src8
;
706 if (copy_to_user(buf
, buffer
, c
)) {
718 return (err
) ? err
: cnt
;
722 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
724 unsigned long p
= *ppos
;
725 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
726 int fbidx
= iminor(inode
);
727 struct fb_info
*info
= registered_fb
[fbidx
];
730 int c
, i
, cnt
= 0, err
= 0;
731 unsigned long total_size
;
733 if (!info
|| !info
->screen_base
)
736 if (info
->state
!= FBINFO_STATE_RUNNING
)
739 if (info
->fbops
->fb_write
)
740 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
742 total_size
= info
->screen_size
;
745 total_size
= info
->fix
.smem_len
;
750 if (count
> total_size
) {
755 if (count
+ p
> total_size
) {
759 count
= total_size
- p
;
762 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
767 dst
= (u32 __iomem
*) (info
->screen_base
+ p
);
769 if (info
->fbops
->fb_sync
)
770 info
->fbops
->fb_sync(info
);
773 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
776 if (copy_from_user(src
, buf
, c
)) {
781 for (i
= c
>> 2; i
--; )
782 fb_writel(*src
++, dst
++);
785 u8
*src8
= (u8
*) src
;
786 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
788 for (i
= c
& 3; i
--; )
789 fb_writeb(*src8
++, dst8
++);
791 dst
= (u32 __iomem
*) dst8
;
802 return (cnt
) ? cnt
: err
;
806 static void try_to_load(int fb
)
808 request_module("fb%d", fb
);
810 #endif /* CONFIG_KMOD */
813 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
815 struct fb_fix_screeninfo
*fix
= &info
->fix
;
816 int xoffset
= var
->xoffset
;
817 int yoffset
= var
->yoffset
;
818 int err
= 0, yres
= info
->var
.yres
;
820 if (var
->yoffset
> 0) {
821 if (var
->vmode
& FB_VMODE_YWRAP
) {
822 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
826 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
830 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
831 (var
->xoffset
% fix
->xpanstep
)))
834 if (err
|| !info
->fbops
->fb_pan_display
|| xoffset
< 0 ||
835 yoffset
< 0 || var
->yoffset
+ yres
> info
->var
.yres_virtual
||
836 var
->xoffset
+ info
->var
.xres
> info
->var
.xres_virtual
)
839 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
841 info
->var
.xoffset
= var
->xoffset
;
842 info
->var
.yoffset
= var
->yoffset
;
843 if (var
->vmode
& FB_VMODE_YWRAP
)
844 info
->var
.vmode
|= FB_VMODE_YWRAP
;
846 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
850 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
853 struct fb_event event
;
854 struct fb_blit_caps caps
, fbcaps
;
857 memset(&caps
, 0, sizeof(caps
));
858 memset(&fbcaps
, 0, sizeof(fbcaps
));
859 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
862 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
863 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
865 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
866 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
867 (fbcaps
.len
< caps
.len
))
874 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
876 int flags
= info
->flags
;
879 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
880 struct fb_videomode mode1
, mode2
;
882 fb_var_to_videomode(&mode1
, var
);
883 fb_var_to_videomode(&mode2
, &info
->var
);
884 /* make sure we don't delete the videomode of current var */
885 ret
= fb_mode_is_equal(&mode1
, &mode2
);
888 struct fb_event event
;
892 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
896 fb_delete_videomode(&mode1
, &info
->modelist
);
899 ret
= (ret
) ? -EINVAL
: 0;
903 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
904 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
905 u32 activate
= var
->activate
;
907 if (!info
->fbops
->fb_check_var
) {
912 ret
= info
->fbops
->fb_check_var(var
, info
);
917 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
918 struct fb_videomode mode
;
920 if (info
->fbops
->fb_get_caps
) {
921 ret
= fb_check_caps(info
, var
, activate
);
929 if (info
->fbops
->fb_set_par
)
930 info
->fbops
->fb_set_par(info
);
932 fb_pan_display(info
, &info
->var
);
933 fb_set_cmap(&info
->cmap
, info
);
934 fb_var_to_videomode(&mode
, &info
->var
);
936 if (info
->modelist
.prev
&& info
->modelist
.next
&&
937 !list_empty(&info
->modelist
))
938 ret
= fb_add_videomode(&mode
, &info
->modelist
);
940 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
941 struct fb_event event
;
942 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
943 FB_EVENT_MODE_CHANGE_ALL
:
944 FB_EVENT_MODE_CHANGE
;
946 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
948 fb_notifier_call_chain(evnt
, &event
);
958 fb_blank(struct fb_info
*info
, int blank
)
962 if (blank
> FB_BLANK_POWERDOWN
)
963 blank
= FB_BLANK_POWERDOWN
;
965 if (info
->fbops
->fb_blank
)
966 ret
= info
->fbops
->fb_blank(blank
, info
);
969 struct fb_event event
;
973 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
980 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
983 int fbidx
= iminor(inode
);
984 struct fb_info
*info
= registered_fb
[fbidx
];
985 struct fb_ops
*fb
= info
->fbops
;
986 struct fb_var_screeninfo var
;
987 struct fb_fix_screeninfo fix
;
988 struct fb_con2fbmap con2fb
;
989 struct fb_cmap_user cmap
;
990 struct fb_event event
;
991 void __user
*argp
= (void __user
*)arg
;
997 case FBIOGET_VSCREENINFO
:
998 return copy_to_user(argp
, &info
->var
,
999 sizeof(var
)) ? -EFAULT
: 0;
1000 case FBIOPUT_VSCREENINFO
:
1001 if (copy_from_user(&var
, argp
, sizeof(var
)))
1003 acquire_console_sem();
1004 info
->flags
|= FBINFO_MISC_USEREVENT
;
1005 i
= fb_set_var(info
, &var
);
1006 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1007 release_console_sem();
1009 if (copy_to_user(argp
, &var
, sizeof(var
)))
1012 case FBIOGET_FSCREENINFO
:
1013 return copy_to_user(argp
, &info
->fix
,
1014 sizeof(fix
)) ? -EFAULT
: 0;
1016 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1018 return (fb_set_user_cmap(&cmap
, info
));
1020 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1022 return fb_cmap_to_user(&info
->cmap
, &cmap
);
1023 case FBIOPAN_DISPLAY
:
1024 if (copy_from_user(&var
, argp
, sizeof(var
)))
1026 acquire_console_sem();
1027 i
= fb_pan_display(info
, &var
);
1028 release_console_sem();
1031 if (copy_to_user(argp
, &var
, sizeof(var
)))
1036 case FBIOGET_CON2FBMAP
:
1037 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1039 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1041 con2fb
.framebuffer
= -1;
1043 event
.data
= &con2fb
;
1044 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
1045 return copy_to_user(argp
, &con2fb
,
1046 sizeof(con2fb
)) ? -EFAULT
: 0;
1047 case FBIOPUT_CON2FBMAP
:
1048 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1050 if (con2fb
.console
< 0 || con2fb
.console
> MAX_NR_CONSOLES
)
1052 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
1055 if (!registered_fb
[con2fb
.framebuffer
])
1056 try_to_load(con2fb
.framebuffer
);
1057 #endif /* CONFIG_KMOD */
1058 if (!registered_fb
[con2fb
.framebuffer
])
1061 event
.data
= &con2fb
;
1062 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
,
1065 acquire_console_sem();
1066 info
->flags
|= FBINFO_MISC_USEREVENT
;
1067 i
= fb_blank(info
, arg
);
1068 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1069 release_console_sem();
1072 if (fb
->fb_ioctl
== NULL
)
1074 return fb
->fb_ioctl(info
, cmd
, arg
);
1078 #ifdef CONFIG_COMPAT
1079 struct fb_fix_screeninfo32
{
1081 compat_caddr_t smem_start
;
1090 compat_caddr_t mmio_start
;
1100 compat_caddr_t green
;
1101 compat_caddr_t blue
;
1102 compat_caddr_t transp
;
1105 static int fb_getput_cmap(struct inode
*inode
, struct file
*file
,
1106 unsigned int cmd
, unsigned long arg
)
1108 struct fb_cmap_user __user
*cmap
;
1109 struct fb_cmap32 __user
*cmap32
;
1113 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1114 cmap32
= compat_ptr(arg
);
1116 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1119 if (get_user(data
, &cmap32
->red
) ||
1120 put_user(compat_ptr(data
), &cmap
->red
) ||
1121 get_user(data
, &cmap32
->green
) ||
1122 put_user(compat_ptr(data
), &cmap
->green
) ||
1123 get_user(data
, &cmap32
->blue
) ||
1124 put_user(compat_ptr(data
), &cmap
->blue
) ||
1125 get_user(data
, &cmap32
->transp
) ||
1126 put_user(compat_ptr(data
), &cmap
->transp
))
1129 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) cmap
);
1132 if (copy_in_user(&cmap32
->start
,
1140 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1141 struct fb_fix_screeninfo32 __user
*fix32
)
1146 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1148 data
= (__u32
) (unsigned long) fix
->smem_start
;
1149 err
|= put_user(data
, &fix32
->smem_start
);
1151 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1152 err
|= put_user(fix
->type
, &fix32
->type
);
1153 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1154 err
|= put_user(fix
->visual
, &fix32
->visual
);
1155 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1156 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1157 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1158 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1160 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1161 err
|= put_user(data
, &fix32
->mmio_start
);
1163 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1164 err
|= put_user(fix
->accel
, &fix32
->accel
);
1165 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1166 sizeof(fix
->reserved
));
1171 static int fb_get_fscreeninfo(struct inode
*inode
, struct file
*file
,
1172 unsigned int cmd
, unsigned long arg
)
1174 mm_segment_t old_fs
;
1175 struct fb_fix_screeninfo fix
;
1176 struct fb_fix_screeninfo32 __user
*fix32
;
1179 fix32
= compat_ptr(arg
);
1183 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) &fix
);
1187 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1193 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1195 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1196 int fbidx
= iminor(inode
);
1197 struct fb_info
*info
= registered_fb
[fbidx
];
1198 struct fb_ops
*fb
= info
->fbops
;
1199 long ret
= -ENOIOCTLCMD
;
1203 case FBIOGET_VSCREENINFO
:
1204 case FBIOPUT_VSCREENINFO
:
1205 case FBIOPAN_DISPLAY
:
1206 case FBIOGET_CON2FBMAP
:
1207 case FBIOPUT_CON2FBMAP
:
1208 arg
= (unsigned long) compat_ptr(arg
);
1210 ret
= fb_ioctl(inode
, file
, cmd
, arg
);
1213 case FBIOGET_FSCREENINFO
:
1214 ret
= fb_get_fscreeninfo(inode
, file
, cmd
, arg
);
1219 ret
= fb_getput_cmap(inode
, file
, cmd
, arg
);
1223 if (fb
->fb_compat_ioctl
)
1224 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1233 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1235 int fbidx
= iminor(file
->f_path
.dentry
->d_inode
);
1236 struct fb_info
*info
= registered_fb
[fbidx
];
1237 struct fb_ops
*fb
= info
->fbops
;
1239 unsigned long start
;
1242 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1244 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1250 res
= fb
->fb_mmap(info
, vma
);
1257 /* frame buffer memory */
1258 start
= info
->fix
.smem_start
;
1259 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1261 /* memory mapped io */
1263 if (info
->var
.accel_flags
) {
1267 start
= info
->fix
.mmio_start
;
1268 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1272 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1275 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1276 /* This is an IO map - tell maydump to skip this VMA */
1277 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1278 fb_pgprotect(file
, vma
, off
);
1279 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1280 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1286 fb_open(struct inode
*inode
, struct file
*file
)
1288 int fbidx
= iminor(inode
);
1289 struct fb_info
*info
;
1292 if (fbidx
>= FB_MAX
)
1295 if (!(info
= registered_fb
[fbidx
]))
1297 #endif /* CONFIG_KMOD */
1298 if (!(info
= registered_fb
[fbidx
]))
1300 if (!try_module_get(info
->fbops
->owner
))
1302 file
->private_data
= info
;
1303 if (info
->fbops
->fb_open
) {
1304 res
= info
->fbops
->fb_open(info
,1);
1306 module_put(info
->fbops
->owner
);
1312 fb_release(struct inode
*inode
, struct file
*file
)
1314 struct fb_info
* const info
= file
->private_data
;
1317 if (info
->fbops
->fb_release
)
1318 info
->fbops
->fb_release(info
,1);
1319 module_put(info
->fbops
->owner
);
1324 static const struct file_operations fb_fops
= {
1325 .owner
= THIS_MODULE
,
1329 #ifdef CONFIG_COMPAT
1330 .compat_ioctl
= fb_compat_ioctl
,
1334 .release
= fb_release
,
1335 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1336 .get_unmapped_area
= get_fb_unmapped_area
,
1338 #ifdef CONFIG_FB_DEFERRED_IO
1339 .fsync
= fb_deferred_io_fsync
,
1343 struct class *fb_class
;
1344 EXPORT_SYMBOL(fb_class
);
1346 * register_framebuffer - registers a frame buffer device
1347 * @fb_info: frame buffer info structure
1349 * Registers a frame buffer device @fb_info.
1351 * Returns negative errno on error, or zero for success.
1356 register_framebuffer(struct fb_info
*fb_info
)
1359 struct fb_event event
;
1360 struct fb_videomode mode
;
1362 if (num_registered_fb
== FB_MAX
)
1364 num_registered_fb
++;
1365 for (i
= 0 ; i
< FB_MAX
; i
++)
1366 if (!registered_fb
[i
])
1370 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1371 MKDEV(FB_MAJOR
, i
), "fb%d", i
);
1372 if (IS_ERR(fb_info
->dev
)) {
1374 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1375 fb_info
->dev
= NULL
;
1377 fb_init_device(fb_info
);
1379 if (fb_info
->pixmap
.addr
== NULL
) {
1380 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1381 if (fb_info
->pixmap
.addr
) {
1382 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1383 fb_info
->pixmap
.buf_align
= 1;
1384 fb_info
->pixmap
.scan_align
= 1;
1385 fb_info
->pixmap
.access_align
= 32;
1386 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1389 fb_info
->pixmap
.offset
= 0;
1391 if (!fb_info
->pixmap
.blit_x
)
1392 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1394 if (!fb_info
->pixmap
.blit_y
)
1395 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1397 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1398 INIT_LIST_HEAD(&fb_info
->modelist
);
1400 fb_var_to_videomode(&mode
, &fb_info
->var
);
1401 fb_add_videomode(&mode
, &fb_info
->modelist
);
1402 registered_fb
[i
] = fb_info
;
1404 event
.info
= fb_info
;
1405 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1411 * unregister_framebuffer - releases a frame buffer device
1412 * @fb_info: frame buffer info structure
1414 * Unregisters a frame buffer device @fb_info.
1416 * Returns negative errno on error, or zero for success.
1418 * This function will also notify the framebuffer console
1419 * to release the driver.
1421 * This is meant to be called within a driver's module_exit()
1422 * function. If this is called outside module_exit(), ensure
1423 * that the driver implements fb_open() and fb_release() to
1424 * check that no processes are using the device.
1428 unregister_framebuffer(struct fb_info
*fb_info
)
1430 struct fb_event event
;
1434 if (!registered_fb
[i
]) {
1439 event
.info
= fb_info
;
1440 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1447 if (fb_info
->pixmap
.addr
&&
1448 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1449 kfree(fb_info
->pixmap
.addr
);
1450 fb_destroy_modelist(&fb_info
->modelist
);
1451 registered_fb
[i
]=NULL
;
1452 num_registered_fb
--;
1453 fb_cleanup_device(fb_info
);
1454 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1455 event
.info
= fb_info
;
1456 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1462 * fb_set_suspend - low level driver signals suspend
1463 * @info: framebuffer affected
1464 * @state: 0 = resuming, !=0 = suspending
1466 * This is meant to be used by low level drivers to
1467 * signal suspend/resume to the core & clients.
1468 * It must be called with the console semaphore held
1470 void fb_set_suspend(struct fb_info
*info
, int state
)
1472 struct fb_event event
;
1476 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1477 info
->state
= FBINFO_STATE_SUSPENDED
;
1479 info
->state
= FBINFO_STATE_RUNNING
;
1480 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1485 * fbmem_init - init frame buffer subsystem
1487 * Initialize the frame buffer subsystem.
1489 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1496 create_proc_read_entry("fb", 0, NULL
, fbmem_read_proc
, NULL
);
1498 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1499 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1501 fb_class
= class_create(THIS_MODULE
, "graphics");
1502 if (IS_ERR(fb_class
)) {
1503 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1510 module_init(fbmem_init
);
1514 class_destroy(fb_class
);
1515 unregister_chrdev(FB_MAJOR
, "fb");
1518 module_exit(fbmem_exit
);
1519 MODULE_LICENSE("GPL");
1520 MODULE_DESCRIPTION("Framebuffer base");
1522 subsys_initcall(fbmem_init
);
1525 int fb_new_modelist(struct fb_info
*info
)
1527 struct fb_event event
;
1528 struct fb_var_screeninfo var
= info
->var
;
1529 struct list_head
*pos
, *n
;
1530 struct fb_modelist
*modelist
;
1531 struct fb_videomode
*m
, mode
;
1534 list_for_each_safe(pos
, n
, &info
->modelist
) {
1535 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1536 m
= &modelist
->mode
;
1537 fb_videomode_to_var(&var
, m
);
1538 var
.activate
= FB_ACTIVATE_TEST
;
1539 err
= fb_set_var(info
, &var
);
1540 fb_var_to_videomode(&mode
, &var
);
1541 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1549 if (!list_empty(&info
->modelist
)) {
1551 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1557 static char *video_options
[FB_MAX
] __read_mostly
;
1558 static int ofonly __read_mostly
;
1560 extern const char *global_mode_option
;
1563 * fb_get_options - get kernel boot parameters
1564 * @name: framebuffer name as it would appear in
1565 * the boot parameter line
1566 * (video=<name>:<options>)
1567 * @option: the option will be stored here
1569 * NOTE: Needed to maintain backwards compatibility
1571 int fb_get_options(char *name
, char **option
)
1573 char *opt
, *options
= NULL
;
1574 int opt_len
, retval
= 0;
1575 int name_len
= strlen(name
), i
;
1577 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1580 if (name_len
&& !retval
) {
1581 for (i
= 0; i
< FB_MAX
; i
++) {
1582 if (video_options
[i
] == NULL
)
1584 opt_len
= strlen(video_options
[i
]);
1587 opt
= video_options
[i
];
1588 if (!strncmp(name
, opt
, name_len
) &&
1589 opt
[name_len
] == ':')
1590 options
= opt
+ name_len
+ 1;
1593 if (options
&& !strncmp(options
, "off", 3))
1604 * video_setup - process command line options
1605 * @options: string of options
1607 * Process command line options for frame buffer subsystem.
1609 * NOTE: This function is a __setup and __init function.
1610 * It only stores the options. Drivers have to call
1611 * fb_get_options() as necessary.
1616 static int __init
video_setup(char *options
)
1620 if (!options
|| !*options
)
1623 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1628 if (!global
&& !strstr(options
, "fb:")) {
1629 global_mode_option
= options
;
1634 for (i
= 0; i
< FB_MAX
; i
++) {
1635 if (video_options
[i
] == NULL
) {
1636 video_options
[i
] = options
;
1645 __setup("video=", video_setup
);
1649 * Visible symbols for modules
1652 EXPORT_SYMBOL(register_framebuffer
);
1653 EXPORT_SYMBOL(unregister_framebuffer
);
1654 EXPORT_SYMBOL(num_registered_fb
);
1655 EXPORT_SYMBOL(registered_fb
);
1656 EXPORT_SYMBOL(fb_prepare_logo
);
1657 EXPORT_SYMBOL(fb_show_logo
);
1658 EXPORT_SYMBOL(fb_set_var
);
1659 EXPORT_SYMBOL(fb_blank
);
1660 EXPORT_SYMBOL(fb_pan_display
);
1661 EXPORT_SYMBOL(fb_get_buffer_offset
);
1662 EXPORT_SYMBOL(fb_set_suspend
);
1663 EXPORT_SYMBOL(fb_get_options
);
1665 MODULE_LICENSE("GPL");