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 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
409 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
412 memset(&fb_logo
, 0, sizeof(struct logo_data
));
414 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
415 info
->flags
& FBINFO_MODULE
)
418 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
419 depth
= info
->var
.blue
.length
;
420 if (info
->var
.red
.length
< depth
)
421 depth
= info
->var
.red
.length
;
422 if (info
->var
.green
.length
< depth
)
423 depth
= info
->var
.green
.length
;
426 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
427 /* assume console colormap */
432 switch (info
->fix
.visual
) {
433 case FB_VISUAL_TRUECOLOR
:
434 fb_logo
.needs_truepalette
= 1;
436 case FB_VISUAL_DIRECTCOLOR
:
437 fb_logo
.needs_directpalette
= 1;
438 fb_logo
.needs_cmapreset
= 1;
440 case FB_VISUAL_PSEUDOCOLOR
:
441 fb_logo
.needs_cmapreset
= 1;
446 /* Return if no suitable logo was found */
447 fb_logo
.logo
= fb_find_logo(depth
);
453 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
454 yres
= info
->var
.yres
;
456 yres
= info
->var
.xres
;
458 if (fb_logo
.logo
->height
> yres
) {
463 /* What depth we asked for might be different from what we get */
464 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
466 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
470 return fb_logo
.logo
->height
;
473 int fb_show_logo(struct fb_info
*info
, int rotate
)
475 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
476 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
477 struct fb_image image
;
479 /* Return if the frame buffer is not mapped or suspended */
480 if (fb_logo
.logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
481 info
->flags
& FBINFO_MODULE
)
485 image
.data
= fb_logo
.logo
->data
;
487 if (fb_logo
.needs_cmapreset
)
488 fb_set_logocmap(info
, fb_logo
.logo
);
490 if (fb_logo
.needs_truepalette
||
491 fb_logo
.needs_directpalette
) {
492 palette
= kmalloc(256 * 4, GFP_KERNEL
);
496 if (fb_logo
.needs_truepalette
)
497 fb_set_logo_truepalette(info
, fb_logo
.logo
, palette
);
499 fb_set_logo_directpalette(info
, fb_logo
.logo
, palette
);
501 saved_pseudo_palette
= info
->pseudo_palette
;
502 info
->pseudo_palette
= palette
;
505 if (fb_logo
.depth
<= 4) {
506 logo_new
= kmalloc(fb_logo
.logo
->width
* fb_logo
.logo
->height
,
508 if (logo_new
== NULL
) {
510 if (saved_pseudo_palette
)
511 info
->pseudo_palette
= saved_pseudo_palette
;
514 image
.data
= logo_new
;
515 fb_set_logo(info
, fb_logo
.logo
, logo_new
, fb_logo
.depth
);
520 image
.width
= fb_logo
.logo
->width
;
521 image
.height
= fb_logo
.logo
->height
;
524 logo_rotate
= kmalloc(fb_logo
.logo
->width
*
525 fb_logo
.logo
->height
, GFP_KERNEL
);
527 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
530 fb_do_show_logo(info
, &image
, rotate
, num_online_cpus());
533 if (saved_pseudo_palette
!= NULL
)
534 info
->pseudo_palette
= saved_pseudo_palette
;
537 return fb_logo
.logo
->height
;
540 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
541 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
542 #endif /* CONFIG_LOGO */
544 static int fbmem_read_proc(char *buf
, char **start
, off_t offset
,
545 int len
, int *eof
, void *private)
551 for (fi
= registered_fb
; fi
< ®istered_fb
[FB_MAX
] && clen
< 4000;
554 clen
+= sprintf(buf
+ clen
, "%d %s\n",
557 *start
= buf
+ offset
;
562 return clen
< len
? clen
: len
;
566 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
568 unsigned long p
= *ppos
;
569 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
570 int fbidx
= iminor(inode
);
571 struct fb_info
*info
= registered_fb
[fbidx
];
574 int c
, i
, cnt
= 0, err
= 0;
575 unsigned long total_size
;
577 if (!info
|| ! info
->screen_base
)
580 if (info
->state
!= FBINFO_STATE_RUNNING
)
583 if (info
->fbops
->fb_read
)
584 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
586 total_size
= info
->screen_size
;
589 total_size
= info
->fix
.smem_len
;
594 if (count
>= total_size
)
597 if (count
+ p
> total_size
)
598 count
= total_size
- p
;
600 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
605 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
607 if (info
->fbops
->fb_sync
)
608 info
->fbops
->fb_sync(info
);
611 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
613 for (i
= c
>> 2; i
--; )
614 *dst
++ = fb_readl(src
++);
616 u8
*dst8
= (u8
*) dst
;
617 u8 __iomem
*src8
= (u8 __iomem
*) src
;
619 for (i
= c
& 3; i
--;)
620 *dst8
++ = fb_readb(src8
++);
622 src
= (u32 __iomem
*) src8
;
625 if (copy_to_user(buf
, buffer
, c
)) {
637 return (err
) ? err
: cnt
;
641 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
643 unsigned long p
= *ppos
;
644 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
645 int fbidx
= iminor(inode
);
646 struct fb_info
*info
= registered_fb
[fbidx
];
649 int c
, i
, cnt
= 0, err
= 0;
650 unsigned long total_size
;
652 if (!info
|| !info
->screen_base
)
655 if (info
->state
!= FBINFO_STATE_RUNNING
)
658 if (info
->fbops
->fb_write
)
659 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
661 total_size
= info
->screen_size
;
664 total_size
= info
->fix
.smem_len
;
669 if (count
> total_size
) {
674 if (count
+ p
> total_size
) {
678 count
= total_size
- p
;
681 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
686 dst
= (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
;
695 if (copy_from_user(src
, buf
, c
)) {
700 for (i
= c
>> 2; i
--; )
701 fb_writel(*src
++, dst
++);
704 u8
*src8
= (u8
*) src
;
705 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
707 for (i
= c
& 3; i
--; )
708 fb_writeb(*src8
++, dst8
++);
710 dst
= (u32 __iomem
*) dst8
;
721 return (cnt
) ? cnt
: err
;
725 static void try_to_load(int fb
)
727 request_module("fb%d", fb
);
729 #endif /* CONFIG_KMOD */
732 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
734 struct fb_fix_screeninfo
*fix
= &info
->fix
;
735 int xoffset
= var
->xoffset
;
736 int yoffset
= var
->yoffset
;
737 int err
= 0, yres
= info
->var
.yres
;
739 if (var
->yoffset
> 0) {
740 if (var
->vmode
& FB_VMODE_YWRAP
) {
741 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
745 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
749 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
750 (var
->xoffset
% fix
->xpanstep
)))
753 if (err
|| !info
->fbops
->fb_pan_display
|| xoffset
< 0 ||
754 yoffset
< 0 || var
->yoffset
+ yres
> info
->var
.yres_virtual
||
755 var
->xoffset
+ info
->var
.xres
> info
->var
.xres_virtual
)
758 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
760 info
->var
.xoffset
= var
->xoffset
;
761 info
->var
.yoffset
= var
->yoffset
;
762 if (var
->vmode
& FB_VMODE_YWRAP
)
763 info
->var
.vmode
|= FB_VMODE_YWRAP
;
765 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
769 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
772 struct fb_event event
;
773 struct fb_blit_caps caps
, fbcaps
;
776 memset(&caps
, 0, sizeof(caps
));
777 memset(&fbcaps
, 0, sizeof(fbcaps
));
778 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
781 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
782 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
784 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
785 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
786 (fbcaps
.len
< caps
.len
))
793 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
795 int flags
= info
->flags
;
798 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
799 struct fb_videomode mode1
, mode2
;
801 fb_var_to_videomode(&mode1
, var
);
802 fb_var_to_videomode(&mode2
, &info
->var
);
803 /* make sure we don't delete the videomode of current var */
804 ret
= fb_mode_is_equal(&mode1
, &mode2
);
807 struct fb_event event
;
811 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
815 fb_delete_videomode(&mode1
, &info
->modelist
);
818 ret
= (ret
) ? -EINVAL
: 0;
822 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
823 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
824 u32 activate
= var
->activate
;
826 if (!info
->fbops
->fb_check_var
) {
831 ret
= info
->fbops
->fb_check_var(var
, info
);
836 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
837 struct fb_videomode mode
;
839 if (info
->fbops
->fb_get_caps
) {
840 ret
= fb_check_caps(info
, var
, activate
);
848 if (info
->fbops
->fb_set_par
)
849 info
->fbops
->fb_set_par(info
);
851 fb_pan_display(info
, &info
->var
);
852 fb_set_cmap(&info
->cmap
, info
);
853 fb_var_to_videomode(&mode
, &info
->var
);
855 if (info
->modelist
.prev
&& info
->modelist
.next
&&
856 !list_empty(&info
->modelist
))
857 ret
= fb_add_videomode(&mode
, &info
->modelist
);
859 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
860 struct fb_event event
;
861 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
862 FB_EVENT_MODE_CHANGE_ALL
:
863 FB_EVENT_MODE_CHANGE
;
865 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
867 fb_notifier_call_chain(evnt
, &event
);
877 fb_blank(struct fb_info
*info
, int blank
)
881 if (blank
> FB_BLANK_POWERDOWN
)
882 blank
= FB_BLANK_POWERDOWN
;
884 if (info
->fbops
->fb_blank
)
885 ret
= info
->fbops
->fb_blank(blank
, info
);
888 struct fb_event event
;
892 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
899 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
902 int fbidx
= iminor(inode
);
903 struct fb_info
*info
= registered_fb
[fbidx
];
904 struct fb_ops
*fb
= info
->fbops
;
905 struct fb_var_screeninfo var
;
906 struct fb_fix_screeninfo fix
;
907 struct fb_con2fbmap con2fb
;
908 struct fb_cmap_user cmap
;
909 struct fb_event event
;
910 void __user
*argp
= (void __user
*)arg
;
916 case FBIOGET_VSCREENINFO
:
917 return copy_to_user(argp
, &info
->var
,
918 sizeof(var
)) ? -EFAULT
: 0;
919 case FBIOPUT_VSCREENINFO
:
920 if (copy_from_user(&var
, argp
, sizeof(var
)))
922 acquire_console_sem();
923 info
->flags
|= FBINFO_MISC_USEREVENT
;
924 i
= fb_set_var(info
, &var
);
925 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
926 release_console_sem();
928 if (copy_to_user(argp
, &var
, sizeof(var
)))
931 case FBIOGET_FSCREENINFO
:
932 return copy_to_user(argp
, &info
->fix
,
933 sizeof(fix
)) ? -EFAULT
: 0;
935 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
937 return (fb_set_user_cmap(&cmap
, info
));
939 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
941 return fb_cmap_to_user(&info
->cmap
, &cmap
);
942 case FBIOPAN_DISPLAY
:
943 if (copy_from_user(&var
, argp
, sizeof(var
)))
945 acquire_console_sem();
946 i
= fb_pan_display(info
, &var
);
947 release_console_sem();
950 if (copy_to_user(argp
, &var
, sizeof(var
)))
955 case FBIOGET_CON2FBMAP
:
956 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
958 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
960 con2fb
.framebuffer
= -1;
962 event
.data
= &con2fb
;
963 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
964 return copy_to_user(argp
, &con2fb
,
965 sizeof(con2fb
)) ? -EFAULT
: 0;
966 case FBIOPUT_CON2FBMAP
:
967 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
969 if (con2fb
.console
< 0 || con2fb
.console
> MAX_NR_CONSOLES
)
971 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
974 if (!registered_fb
[con2fb
.framebuffer
])
975 try_to_load(con2fb
.framebuffer
);
976 #endif /* CONFIG_KMOD */
977 if (!registered_fb
[con2fb
.framebuffer
])
980 event
.data
= &con2fb
;
981 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
,
984 acquire_console_sem();
985 info
->flags
|= FBINFO_MISC_USEREVENT
;
986 i
= fb_blank(info
, arg
);
987 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
988 release_console_sem();
991 if (fb
->fb_ioctl
== NULL
)
993 return fb
->fb_ioctl(info
, cmd
, arg
);
998 struct fb_fix_screeninfo32
{
1000 compat_caddr_t smem_start
;
1009 compat_caddr_t mmio_start
;
1019 compat_caddr_t green
;
1020 compat_caddr_t blue
;
1021 compat_caddr_t transp
;
1024 static int fb_getput_cmap(struct inode
*inode
, struct file
*file
,
1025 unsigned int cmd
, unsigned long arg
)
1027 struct fb_cmap_user __user
*cmap
;
1028 struct fb_cmap32 __user
*cmap32
;
1032 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1033 cmap32
= compat_ptr(arg
);
1035 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1038 if (get_user(data
, &cmap32
->red
) ||
1039 put_user(compat_ptr(data
), &cmap
->red
) ||
1040 get_user(data
, &cmap32
->green
) ||
1041 put_user(compat_ptr(data
), &cmap
->green
) ||
1042 get_user(data
, &cmap32
->blue
) ||
1043 put_user(compat_ptr(data
), &cmap
->blue
) ||
1044 get_user(data
, &cmap32
->transp
) ||
1045 put_user(compat_ptr(data
), &cmap
->transp
))
1048 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) cmap
);
1051 if (copy_in_user(&cmap32
->start
,
1059 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1060 struct fb_fix_screeninfo32 __user
*fix32
)
1065 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1067 data
= (__u32
) (unsigned long) fix
->smem_start
;
1068 err
|= put_user(data
, &fix32
->smem_start
);
1070 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1071 err
|= put_user(fix
->type
, &fix32
->type
);
1072 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1073 err
|= put_user(fix
->visual
, &fix32
->visual
);
1074 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1075 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1076 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1077 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1079 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1080 err
|= put_user(data
, &fix32
->mmio_start
);
1082 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1083 err
|= put_user(fix
->accel
, &fix32
->accel
);
1084 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1085 sizeof(fix
->reserved
));
1090 static int fb_get_fscreeninfo(struct inode
*inode
, struct file
*file
,
1091 unsigned int cmd
, unsigned long arg
)
1093 mm_segment_t old_fs
;
1094 struct fb_fix_screeninfo fix
;
1095 struct fb_fix_screeninfo32 __user
*fix32
;
1098 fix32
= compat_ptr(arg
);
1102 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) &fix
);
1106 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1112 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1114 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1115 int fbidx
= iminor(inode
);
1116 struct fb_info
*info
= registered_fb
[fbidx
];
1117 struct fb_ops
*fb
= info
->fbops
;
1118 long ret
= -ENOIOCTLCMD
;
1122 case FBIOGET_VSCREENINFO
:
1123 case FBIOPUT_VSCREENINFO
:
1124 case FBIOPAN_DISPLAY
:
1125 case FBIOGET_CON2FBMAP
:
1126 case FBIOPUT_CON2FBMAP
:
1127 arg
= (unsigned long) compat_ptr(arg
);
1129 ret
= fb_ioctl(inode
, file
, cmd
, arg
);
1132 case FBIOGET_FSCREENINFO
:
1133 ret
= fb_get_fscreeninfo(inode
, file
, cmd
, arg
);
1138 ret
= fb_getput_cmap(inode
, file
, cmd
, arg
);
1142 if (fb
->fb_compat_ioctl
)
1143 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1152 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1154 int fbidx
= iminor(file
->f_path
.dentry
->d_inode
);
1155 struct fb_info
*info
= registered_fb
[fbidx
];
1156 struct fb_ops
*fb
= info
->fbops
;
1158 unsigned long start
;
1161 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1163 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1169 res
= fb
->fb_mmap(info
, vma
);
1176 /* frame buffer memory */
1177 start
= info
->fix
.smem_start
;
1178 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1180 /* memory mapped io */
1182 if (info
->var
.accel_flags
) {
1186 start
= info
->fix
.mmio_start
;
1187 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1191 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1194 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1195 /* This is an IO map - tell maydump to skip this VMA */
1196 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1197 fb_pgprotect(file
, vma
, off
);
1198 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1199 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1205 fb_open(struct inode
*inode
, struct file
*file
)
1207 int fbidx
= iminor(inode
);
1208 struct fb_info
*info
;
1211 if (fbidx
>= FB_MAX
)
1214 if (!(info
= registered_fb
[fbidx
]))
1216 #endif /* CONFIG_KMOD */
1217 if (!(info
= registered_fb
[fbidx
]))
1219 if (!try_module_get(info
->fbops
->owner
))
1221 file
->private_data
= info
;
1222 if (info
->fbops
->fb_open
) {
1223 res
= info
->fbops
->fb_open(info
,1);
1225 module_put(info
->fbops
->owner
);
1231 fb_release(struct inode
*inode
, struct file
*file
)
1233 struct fb_info
* const info
= file
->private_data
;
1236 if (info
->fbops
->fb_release
)
1237 info
->fbops
->fb_release(info
,1);
1238 module_put(info
->fbops
->owner
);
1243 static const struct file_operations fb_fops
= {
1244 .owner
= THIS_MODULE
,
1248 #ifdef CONFIG_COMPAT
1249 .compat_ioctl
= fb_compat_ioctl
,
1253 .release
= fb_release
,
1254 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1255 .get_unmapped_area
= get_fb_unmapped_area
,
1257 #ifdef CONFIG_FB_DEFERRED_IO
1258 .fsync
= fb_deferred_io_fsync
,
1262 struct class *fb_class
;
1263 EXPORT_SYMBOL(fb_class
);
1265 * register_framebuffer - registers a frame buffer device
1266 * @fb_info: frame buffer info structure
1268 * Registers a frame buffer device @fb_info.
1270 * Returns negative errno on error, or zero for success.
1275 register_framebuffer(struct fb_info
*fb_info
)
1278 struct fb_event event
;
1279 struct fb_videomode mode
;
1281 if (num_registered_fb
== FB_MAX
)
1283 num_registered_fb
++;
1284 for (i
= 0 ; i
< FB_MAX
; i
++)
1285 if (!registered_fb
[i
])
1289 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1290 MKDEV(FB_MAJOR
, i
), "fb%d", i
);
1291 if (IS_ERR(fb_info
->dev
)) {
1293 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1294 fb_info
->dev
= NULL
;
1296 fb_init_device(fb_info
);
1298 if (fb_info
->pixmap
.addr
== NULL
) {
1299 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1300 if (fb_info
->pixmap
.addr
) {
1301 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1302 fb_info
->pixmap
.buf_align
= 1;
1303 fb_info
->pixmap
.scan_align
= 1;
1304 fb_info
->pixmap
.access_align
= 32;
1305 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1308 fb_info
->pixmap
.offset
= 0;
1310 if (!fb_info
->pixmap
.blit_x
)
1311 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1313 if (!fb_info
->pixmap
.blit_y
)
1314 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1316 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1317 INIT_LIST_HEAD(&fb_info
->modelist
);
1319 fb_var_to_videomode(&mode
, &fb_info
->var
);
1320 fb_add_videomode(&mode
, &fb_info
->modelist
);
1321 registered_fb
[i
] = fb_info
;
1323 event
.info
= fb_info
;
1324 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1330 * unregister_framebuffer - releases a frame buffer device
1331 * @fb_info: frame buffer info structure
1333 * Unregisters a frame buffer device @fb_info.
1335 * Returns negative errno on error, or zero for success.
1337 * This function will also notify the framebuffer console
1338 * to release the driver.
1340 * This is meant to be called within a driver's module_exit()
1341 * function. If this is called outside module_exit(), ensure
1342 * that the driver implements fb_open() and fb_release() to
1343 * check that no processes are using the device.
1347 unregister_framebuffer(struct fb_info
*fb_info
)
1349 struct fb_event event
;
1353 if (!registered_fb
[i
]) {
1358 event
.info
= fb_info
;
1359 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1366 if (fb_info
->pixmap
.addr
&&
1367 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1368 kfree(fb_info
->pixmap
.addr
);
1369 fb_destroy_modelist(&fb_info
->modelist
);
1370 registered_fb
[i
]=NULL
;
1371 num_registered_fb
--;
1372 fb_cleanup_device(fb_info
);
1373 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1374 event
.info
= fb_info
;
1375 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1381 * fb_set_suspend - low level driver signals suspend
1382 * @info: framebuffer affected
1383 * @state: 0 = resuming, !=0 = suspending
1385 * This is meant to be used by low level drivers to
1386 * signal suspend/resume to the core & clients.
1387 * It must be called with the console semaphore held
1389 void fb_set_suspend(struct fb_info
*info
, int state
)
1391 struct fb_event event
;
1395 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1396 info
->state
= FBINFO_STATE_SUSPENDED
;
1398 info
->state
= FBINFO_STATE_RUNNING
;
1399 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1404 * fbmem_init - init frame buffer subsystem
1406 * Initialize the frame buffer subsystem.
1408 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1415 create_proc_read_entry("fb", 0, NULL
, fbmem_read_proc
, NULL
);
1417 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1418 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1420 fb_class
= class_create(THIS_MODULE
, "graphics");
1421 if (IS_ERR(fb_class
)) {
1422 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1429 module_init(fbmem_init
);
1433 class_destroy(fb_class
);
1434 unregister_chrdev(FB_MAJOR
, "fb");
1437 module_exit(fbmem_exit
);
1438 MODULE_LICENSE("GPL");
1439 MODULE_DESCRIPTION("Framebuffer base");
1441 subsys_initcall(fbmem_init
);
1444 int fb_new_modelist(struct fb_info
*info
)
1446 struct fb_event event
;
1447 struct fb_var_screeninfo var
= info
->var
;
1448 struct list_head
*pos
, *n
;
1449 struct fb_modelist
*modelist
;
1450 struct fb_videomode
*m
, mode
;
1453 list_for_each_safe(pos
, n
, &info
->modelist
) {
1454 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1455 m
= &modelist
->mode
;
1456 fb_videomode_to_var(&var
, m
);
1457 var
.activate
= FB_ACTIVATE_TEST
;
1458 err
= fb_set_var(info
, &var
);
1459 fb_var_to_videomode(&mode
, &var
);
1460 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1468 if (!list_empty(&info
->modelist
)) {
1470 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1476 static char *video_options
[FB_MAX
] __read_mostly
;
1477 static int ofonly __read_mostly
;
1479 extern const char *global_mode_option
;
1482 * fb_get_options - get kernel boot parameters
1483 * @name: framebuffer name as it would appear in
1484 * the boot parameter line
1485 * (video=<name>:<options>)
1486 * @option: the option will be stored here
1488 * NOTE: Needed to maintain backwards compatibility
1490 int fb_get_options(char *name
, char **option
)
1492 char *opt
, *options
= NULL
;
1493 int opt_len
, retval
= 0;
1494 int name_len
= strlen(name
), i
;
1496 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1499 if (name_len
&& !retval
) {
1500 for (i
= 0; i
< FB_MAX
; i
++) {
1501 if (video_options
[i
] == NULL
)
1503 opt_len
= strlen(video_options
[i
]);
1506 opt
= video_options
[i
];
1507 if (!strncmp(name
, opt
, name_len
) &&
1508 opt
[name_len
] == ':')
1509 options
= opt
+ name_len
+ 1;
1512 if (options
&& !strncmp(options
, "off", 3))
1523 * video_setup - process command line options
1524 * @options: string of options
1526 * Process command line options for frame buffer subsystem.
1528 * NOTE: This function is a __setup and __init function.
1529 * It only stores the options. Drivers have to call
1530 * fb_get_options() as necessary.
1535 static int __init
video_setup(char *options
)
1539 if (!options
|| !*options
)
1542 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1547 if (!global
&& !strstr(options
, "fb:")) {
1548 global_mode_option
= options
;
1553 for (i
= 0; i
< FB_MAX
; i
++) {
1554 if (video_options
[i
] == NULL
) {
1555 video_options
[i
] = options
;
1564 __setup("video=", video_setup
);
1568 * Visible symbols for modules
1571 EXPORT_SYMBOL(register_framebuffer
);
1572 EXPORT_SYMBOL(unregister_framebuffer
);
1573 EXPORT_SYMBOL(num_registered_fb
);
1574 EXPORT_SYMBOL(registered_fb
);
1575 EXPORT_SYMBOL(fb_prepare_logo
);
1576 EXPORT_SYMBOL(fb_show_logo
);
1577 EXPORT_SYMBOL(fb_set_var
);
1578 EXPORT_SYMBOL(fb_blank
);
1579 EXPORT_SYMBOL(fb_pan_display
);
1580 EXPORT_SYMBOL(fb_get_buffer_offset
);
1581 EXPORT_SYMBOL(fb_set_suspend
);
1582 EXPORT_SYMBOL(fb_get_options
);
1584 MODULE_LICENSE("GPL");