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>
37 #if defined(__mc68000__) || defined(CONFIG_APUS)
38 #include <asm/setup.h>
42 #include <asm/uaccess.h>
44 #include <asm/pgtable.h>
49 * Frame buffer device initialization and setup routines
52 #define FBPIXMAPSIZE (1024 * 8)
54 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
55 int num_registered_fb __read_mostly
;
61 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
62 struct fb_fix_screeninfo
*fix
)
66 if (fix
->visual
== FB_VISUAL_MONO01
||
67 fix
->visual
== FB_VISUAL_MONO10
)
70 if (var
->green
.length
== var
->blue
.length
&&
71 var
->green
.length
== var
->red
.length
&&
72 var
->green
.offset
== var
->blue
.offset
&&
73 var
->green
.offset
== var
->red
.offset
)
74 depth
= var
->green
.length
;
76 depth
= var
->green
.length
+ var
->red
.length
+
82 EXPORT_SYMBOL(fb_get_color_depth
);
85 * Data padding functions.
87 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
89 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
91 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
93 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
94 u32 shift_high
, u32 shift_low
, u32 mod
)
96 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
99 for (i
= height
; i
--; ) {
100 for (j
= 0; j
< idx
; j
++) {
103 tmp
|= *src
>> shift_low
;
105 tmp
= *src
<< shift_high
;
111 tmp
|= *src
>> shift_low
;
113 if (shift_high
< mod
) {
114 tmp
= *src
<< shift_high
;
121 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
124 * we need to lock this section since fb_cursor
125 * may use fb_imageblit()
127 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
129 u32 align
= buf
->buf_align
- 1, offset
;
130 char *addr
= buf
->addr
;
132 /* If IO mapped, we need to sync before access, no sharing of
135 if (buf
->flags
& FB_PIXMAP_IO
) {
136 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
137 info
->fbops
->fb_sync(info
);
141 /* See if we fit in the remaining pixmap space */
142 offset
= buf
->offset
+ align
;
144 if (offset
+ size
> buf
->size
) {
145 /* We do not fit. In order to be able to re-use the buffer,
146 * we must ensure no asynchronous DMA'ing or whatever operation
147 * is in progress, we sync for that.
149 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
150 info
->fbops
->fb_sync(info
);
153 buf
->offset
= offset
+ size
;
161 static inline unsigned safe_shift(unsigned d
, int n
)
163 return n
< 0 ? d
>> -n
: d
<< n
;
166 static void fb_set_logocmap(struct fb_info
*info
,
167 const struct linux_logo
*logo
)
169 struct fb_cmap palette_cmap
;
170 u16 palette_green
[16];
171 u16 palette_blue
[16];
174 const unsigned char *clut
= logo
->clut
;
176 palette_cmap
.start
= 0;
177 palette_cmap
.len
= 16;
178 palette_cmap
.red
= palette_red
;
179 palette_cmap
.green
= palette_green
;
180 palette_cmap
.blue
= palette_blue
;
181 palette_cmap
.transp
= NULL
;
183 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
184 n
= logo
->clutsize
- i
;
185 /* palette_cmap provides space for only 16 colors at once */
188 palette_cmap
.start
= 32 + i
;
189 palette_cmap
.len
= n
;
190 for (j
= 0; j
< n
; ++j
) {
191 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
192 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
193 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
196 fb_set_cmap(&palette_cmap
, info
);
200 static void fb_set_logo_truepalette(struct fb_info
*info
,
201 const struct linux_logo
*logo
,
204 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
205 unsigned char redmask
, greenmask
, bluemask
;
206 int redshift
, greenshift
, blueshift
;
208 const unsigned char *clut
= logo
->clut
;
211 * We have to create a temporary palette since console palette is only
214 /* Bug: Doesn't obey msb_right ... (who needs that?) */
215 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
216 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
217 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
218 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
219 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
220 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
222 for ( i
= 0; i
< logo
->clutsize
; i
++) {
223 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
224 safe_shift((clut
[1] & greenmask
), greenshift
) |
225 safe_shift((clut
[2] & bluemask
), blueshift
));
230 static void fb_set_logo_directpalette(struct fb_info
*info
,
231 const struct linux_logo
*logo
,
234 int redshift
, greenshift
, blueshift
;
237 redshift
= info
->var
.red
.offset
;
238 greenshift
= info
->var
.green
.offset
;
239 blueshift
= info
->var
.blue
.offset
;
241 for (i
= 32; i
< logo
->clutsize
; i
++)
242 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
245 static void fb_set_logo(struct fb_info
*info
,
246 const struct linux_logo
*logo
, u8
*dst
,
250 const u8
*src
= logo
->data
;
251 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
254 if (fb_get_color_depth(&info
->var
, &info
->fix
) == 3)
257 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
258 info
->fix
.visual
== FB_VISUAL_MONO10
)
259 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
263 for (i
= 0; i
< logo
->height
; i
++)
264 for (j
= 0; j
< logo
->width
; src
++) {
267 if (j
< logo
->width
) {
268 *dst
++ = *src
& 0x0f;
274 for (i
= 0; i
< logo
->height
; i
++) {
275 for (j
= 0; j
< logo
->width
; src
++) {
277 for (k
= 7; k
>= 0; k
--) {
278 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
288 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
289 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
290 * the visual format and color depth of the framebuffer, the DAC, the
291 * pseudo_palette, and the logo data will be adjusted accordingly.
293 * Case 1 - linux_logo_clut224:
294 * Color exceeds the number of console colors (16), thus we set the hardware DAC
295 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
297 * For visuals that require color info from the pseudo_palette, we also construct
298 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
301 * Case 2 - linux_logo_vga16:
302 * The number of colors just matches the console colors, thus there is no need
303 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
304 * each byte contains color information for two pixels (upper and lower nibble).
305 * To be consistent with fb_imageblit() usage, we therefore separate the two
306 * nibbles into separate bytes. The "depth" flag will be set to 4.
308 * Case 3 - linux_logo_mono:
309 * This is similar with Case 2. Each byte contains information for 8 pixels.
310 * We isolate each bit and expand each into a byte. The "depth" flag will
313 static struct logo_data
{
315 int needs_directpalette
;
316 int needs_truepalette
;
318 const struct linux_logo
*logo
;
319 } fb_logo __read_mostly
;
321 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
323 u32 size
= width
* height
, i
;
327 for (i
= size
; i
--; )
331 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
333 int i
, j
, h
= height
- 1;
335 for (i
= 0; i
< height
; i
++)
336 for (j
= 0; j
< width
; j
++)
337 out
[height
* j
+ h
- i
] = *in
++;
340 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
342 int i
, j
, w
= width
- 1;
344 for (i
= 0; i
< height
; i
++)
345 for (j
= 0; j
< width
; j
++)
346 out
[height
* (w
- j
) + i
] = *in
++;
349 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
350 struct fb_image
*image
, int rotate
)
354 if (rotate
== FB_ROTATE_UD
) {
355 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
357 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
358 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
359 } else if (rotate
== FB_ROTATE_CW
) {
360 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
363 image
->width
= image
->height
;
366 image
->dy
= image
->dx
;
367 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
368 } else if (rotate
== FB_ROTATE_CCW
) {
369 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
372 image
->width
= image
->height
;
375 image
->dx
= image
->dy
;
376 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
382 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
383 int rotate
, unsigned int num
)
387 if (rotate
== FB_ROTATE_UR
) {
389 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
391 info
->fbops
->fb_imageblit(info
, image
);
392 image
->dx
+= image
->width
+ 8;
394 } else if (rotate
== FB_ROTATE_UD
) {
395 for (x
= 0; x
< num
&& image
->dx
>= 0; x
++) {
396 info
->fbops
->fb_imageblit(info
, image
);
397 image
->dx
-= image
->width
+ 8;
399 } else if (rotate
== FB_ROTATE_CW
) {
401 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
403 info
->fbops
->fb_imageblit(info
, image
);
404 image
->dy
+= image
->height
+ 8;
406 } else if (rotate
== FB_ROTATE_CCW
) {
407 for (x
= 0; x
< num
&& image
->dy
>= 0; x
++) {
408 info
->fbops
->fb_imageblit(info
, image
);
409 image
->dy
-= image
->height
+ 8;
414 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
416 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
419 memset(&fb_logo
, 0, sizeof(struct logo_data
));
421 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
422 info
->flags
& FBINFO_MODULE
)
425 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
426 depth
= info
->var
.blue
.length
;
427 if (info
->var
.red
.length
< depth
)
428 depth
= info
->var
.red
.length
;
429 if (info
->var
.green
.length
< depth
)
430 depth
= info
->var
.green
.length
;
433 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
434 /* assume console colormap */
439 switch (info
->fix
.visual
) {
440 case FB_VISUAL_TRUECOLOR
:
441 fb_logo
.needs_truepalette
= 1;
443 case FB_VISUAL_DIRECTCOLOR
:
444 fb_logo
.needs_directpalette
= 1;
445 fb_logo
.needs_cmapreset
= 1;
447 case FB_VISUAL_PSEUDOCOLOR
:
448 fb_logo
.needs_cmapreset
= 1;
453 /* Return if no suitable logo was found */
454 fb_logo
.logo
= fb_find_logo(depth
);
460 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
461 yres
= info
->var
.yres
;
463 yres
= info
->var
.xres
;
465 if (fb_logo
.logo
->height
> yres
) {
470 /* What depth we asked for might be different from what we get */
471 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
473 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
477 return fb_logo
.logo
->height
;
480 int fb_show_logo(struct fb_info
*info
, int rotate
)
482 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
483 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
484 struct fb_image image
;
486 /* Return if the frame buffer is not mapped or suspended */
487 if (fb_logo
.logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
488 info
->flags
& FBINFO_MODULE
)
492 image
.data
= fb_logo
.logo
->data
;
494 if (fb_logo
.needs_cmapreset
)
495 fb_set_logocmap(info
, fb_logo
.logo
);
497 if (fb_logo
.needs_truepalette
||
498 fb_logo
.needs_directpalette
) {
499 palette
= kmalloc(256 * 4, GFP_KERNEL
);
503 if (fb_logo
.needs_truepalette
)
504 fb_set_logo_truepalette(info
, fb_logo
.logo
, palette
);
506 fb_set_logo_directpalette(info
, fb_logo
.logo
, palette
);
508 saved_pseudo_palette
= info
->pseudo_palette
;
509 info
->pseudo_palette
= palette
;
512 if (fb_logo
.depth
<= 4) {
513 logo_new
= kmalloc(fb_logo
.logo
->width
* fb_logo
.logo
->height
,
515 if (logo_new
== NULL
) {
517 if (saved_pseudo_palette
)
518 info
->pseudo_palette
= saved_pseudo_palette
;
521 image
.data
= logo_new
;
522 fb_set_logo(info
, fb_logo
.logo
, logo_new
, fb_logo
.depth
);
527 image
.width
= fb_logo
.logo
->width
;
528 image
.height
= fb_logo
.logo
->height
;
531 logo_rotate
= kmalloc(fb_logo
.logo
->width
*
532 fb_logo
.logo
->height
, GFP_KERNEL
);
534 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
537 fb_do_show_logo(info
, &image
, rotate
, num_online_cpus());
540 if (saved_pseudo_palette
!= NULL
)
541 info
->pseudo_palette
= saved_pseudo_palette
;
544 return fb_logo
.logo
->height
;
547 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
548 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
549 #endif /* CONFIG_LOGO */
551 static int fbmem_read_proc(char *buf
, char **start
, off_t offset
,
552 int len
, int *eof
, void *private)
558 for (fi
= registered_fb
; fi
< ®istered_fb
[FB_MAX
] && clen
< 4000;
561 clen
+= sprintf(buf
+ clen
, "%d %s\n",
564 *start
= buf
+ offset
;
569 return clen
< len
? clen
: len
;
573 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
575 unsigned long p
= *ppos
;
576 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
577 int fbidx
= iminor(inode
);
578 struct fb_info
*info
= registered_fb
[fbidx
];
581 int c
, i
, cnt
= 0, err
= 0;
582 unsigned long total_size
;
584 if (!info
|| ! info
->screen_base
)
587 if (info
->state
!= FBINFO_STATE_RUNNING
)
590 if (info
->fbops
->fb_read
)
591 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
593 total_size
= info
->screen_size
;
596 total_size
= info
->fix
.smem_len
;
601 if (count
>= total_size
)
604 if (count
+ p
> total_size
)
605 count
= total_size
- p
;
607 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
612 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
614 if (info
->fbops
->fb_sync
)
615 info
->fbops
->fb_sync(info
);
618 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
620 for (i
= c
>> 2; i
--; )
621 *dst
++ = fb_readl(src
++);
623 u8
*dst8
= (u8
*) dst
;
624 u8 __iomem
*src8
= (u8 __iomem
*) src
;
626 for (i
= c
& 3; i
--;)
627 *dst8
++ = fb_readb(src8
++);
629 src
= (u32 __iomem
*) src8
;
632 if (copy_to_user(buf
, buffer
, c
)) {
644 return (err
) ? err
: cnt
;
648 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
650 unsigned long p
= *ppos
;
651 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
652 int fbidx
= iminor(inode
);
653 struct fb_info
*info
= registered_fb
[fbidx
];
656 int c
, i
, cnt
= 0, err
= 0;
657 unsigned long total_size
;
659 if (!info
|| !info
->screen_base
)
662 if (info
->state
!= FBINFO_STATE_RUNNING
)
665 if (info
->fbops
->fb_write
)
666 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
668 total_size
= info
->screen_size
;
671 total_size
= info
->fix
.smem_len
;
676 if (count
> total_size
) {
681 if (count
+ p
> total_size
) {
685 count
= total_size
- p
;
688 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
693 dst
= (u32 __iomem
*) (info
->screen_base
+ p
);
695 if (info
->fbops
->fb_sync
)
696 info
->fbops
->fb_sync(info
);
699 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
702 if (copy_from_user(src
, buf
, c
)) {
707 for (i
= c
>> 2; i
--; )
708 fb_writel(*src
++, dst
++);
711 u8
*src8
= (u8
*) src
;
712 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
714 for (i
= c
& 3; i
--; )
715 fb_writeb(*src8
++, dst8
++);
717 dst
= (u32 __iomem
*) dst8
;
728 return (cnt
) ? cnt
: err
;
732 static void try_to_load(int fb
)
734 request_module("fb%d", fb
);
736 #endif /* CONFIG_KMOD */
739 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
741 struct fb_fix_screeninfo
*fix
= &info
->fix
;
742 int xoffset
= var
->xoffset
;
743 int yoffset
= var
->yoffset
;
744 int err
= 0, yres
= info
->var
.yres
;
746 if (var
->yoffset
> 0) {
747 if (var
->vmode
& FB_VMODE_YWRAP
) {
748 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
752 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
756 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
757 (var
->xoffset
% fix
->xpanstep
)))
760 if (err
|| !info
->fbops
->fb_pan_display
|| xoffset
< 0 ||
761 yoffset
< 0 || var
->yoffset
+ yres
> info
->var
.yres_virtual
||
762 var
->xoffset
+ info
->var
.xres
> info
->var
.xres_virtual
)
765 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
767 info
->var
.xoffset
= var
->xoffset
;
768 info
->var
.yoffset
= var
->yoffset
;
769 if (var
->vmode
& FB_VMODE_YWRAP
)
770 info
->var
.vmode
|= FB_VMODE_YWRAP
;
772 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
777 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
779 int err
, flags
= info
->flags
;
781 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
782 struct fb_videomode mode1
, mode2
;
785 fb_var_to_videomode(&mode1
, var
);
786 fb_var_to_videomode(&mode2
, &info
->var
);
787 /* make sure we don't delete the videomode of current var */
788 ret
= fb_mode_is_equal(&mode1
, &mode2
);
791 struct fb_event event
;
795 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
799 fb_delete_videomode(&mode1
, &info
->modelist
);
804 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
805 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
806 u32 activate
= var
->activate
;
808 if (!info
->fbops
->fb_check_var
) {
813 if ((err
= info
->fbops
->fb_check_var(var
, info
)))
816 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
817 struct fb_videomode mode
;
821 if (info
->fbops
->fb_set_par
)
822 info
->fbops
->fb_set_par(info
);
824 fb_pan_display(info
, &info
->var
);
826 fb_set_cmap(&info
->cmap
, info
);
828 fb_var_to_videomode(&mode
, &info
->var
);
830 if (info
->modelist
.prev
&& info
->modelist
.next
&&
831 !list_empty(&info
->modelist
))
832 err
= fb_add_videomode(&mode
, &info
->modelist
);
834 if (!err
&& (flags
& FBINFO_MISC_USEREVENT
)) {
835 struct fb_event event
;
836 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
837 FB_EVENT_MODE_CHANGE_ALL
:
838 FB_EVENT_MODE_CHANGE
;
840 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
842 fb_notifier_call_chain(evnt
, &event
);
850 fb_blank(struct fb_info
*info
, int blank
)
854 if (blank
> FB_BLANK_POWERDOWN
)
855 blank
= FB_BLANK_POWERDOWN
;
857 if (info
->fbops
->fb_blank
)
858 ret
= info
->fbops
->fb_blank(blank
, info
);
861 struct fb_event event
;
865 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
872 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
875 int fbidx
= iminor(inode
);
876 struct fb_info
*info
= registered_fb
[fbidx
];
877 struct fb_ops
*fb
= info
->fbops
;
878 struct fb_var_screeninfo var
;
879 struct fb_fix_screeninfo fix
;
880 struct fb_con2fbmap con2fb
;
881 struct fb_cmap_user cmap
;
882 struct fb_event event
;
883 void __user
*argp
= (void __user
*)arg
;
889 case FBIOGET_VSCREENINFO
:
890 return copy_to_user(argp
, &info
->var
,
891 sizeof(var
)) ? -EFAULT
: 0;
892 case FBIOPUT_VSCREENINFO
:
893 if (copy_from_user(&var
, argp
, sizeof(var
)))
895 acquire_console_sem();
896 info
->flags
|= FBINFO_MISC_USEREVENT
;
897 i
= fb_set_var(info
, &var
);
898 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
899 release_console_sem();
901 if (copy_to_user(argp
, &var
, sizeof(var
)))
904 case FBIOGET_FSCREENINFO
:
905 return copy_to_user(argp
, &info
->fix
,
906 sizeof(fix
)) ? -EFAULT
: 0;
908 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
910 return (fb_set_user_cmap(&cmap
, info
));
912 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
914 return fb_cmap_to_user(&info
->cmap
, &cmap
);
915 case FBIOPAN_DISPLAY
:
916 if (copy_from_user(&var
, argp
, sizeof(var
)))
918 acquire_console_sem();
919 i
= fb_pan_display(info
, &var
);
920 release_console_sem();
923 if (copy_to_user(argp
, &var
, sizeof(var
)))
928 case FBIOGET_CON2FBMAP
:
929 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
931 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
933 con2fb
.framebuffer
= -1;
935 event
.data
= &con2fb
;
936 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
937 return copy_to_user(argp
, &con2fb
,
938 sizeof(con2fb
)) ? -EFAULT
: 0;
939 case FBIOPUT_CON2FBMAP
:
940 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
942 if (con2fb
.console
< 0 || con2fb
.console
> MAX_NR_CONSOLES
)
944 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
947 if (!registered_fb
[con2fb
.framebuffer
])
948 try_to_load(con2fb
.framebuffer
);
949 #endif /* CONFIG_KMOD */
950 if (!registered_fb
[con2fb
.framebuffer
])
953 event
.data
= &con2fb
;
954 return fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
,
957 acquire_console_sem();
958 info
->flags
|= FBINFO_MISC_USEREVENT
;
959 i
= fb_blank(info
, arg
);
960 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
961 release_console_sem();
964 if (fb
->fb_ioctl
== NULL
)
966 return fb
->fb_ioctl(info
, cmd
, arg
);
971 struct fb_fix_screeninfo32
{
973 compat_caddr_t smem_start
;
982 compat_caddr_t mmio_start
;
992 compat_caddr_t green
;
994 compat_caddr_t transp
;
997 static int fb_getput_cmap(struct inode
*inode
, struct file
*file
,
998 unsigned int cmd
, unsigned long arg
)
1000 struct fb_cmap_user __user
*cmap
;
1001 struct fb_cmap32 __user
*cmap32
;
1005 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1006 cmap32
= compat_ptr(arg
);
1008 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1011 if (get_user(data
, &cmap32
->red
) ||
1012 put_user(compat_ptr(data
), &cmap
->red
) ||
1013 get_user(data
, &cmap32
->green
) ||
1014 put_user(compat_ptr(data
), &cmap
->green
) ||
1015 get_user(data
, &cmap32
->blue
) ||
1016 put_user(compat_ptr(data
), &cmap
->blue
) ||
1017 get_user(data
, &cmap32
->transp
) ||
1018 put_user(compat_ptr(data
), &cmap
->transp
))
1021 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) cmap
);
1024 if (copy_in_user(&cmap32
->start
,
1032 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1033 struct fb_fix_screeninfo32 __user
*fix32
)
1038 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1040 data
= (__u32
) (unsigned long) fix
->smem_start
;
1041 err
|= put_user(data
, &fix32
->smem_start
);
1043 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1044 err
|= put_user(fix
->type
, &fix32
->type
);
1045 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1046 err
|= put_user(fix
->visual
, &fix32
->visual
);
1047 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1048 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1049 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1050 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1052 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1053 err
|= put_user(data
, &fix32
->mmio_start
);
1055 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1056 err
|= put_user(fix
->accel
, &fix32
->accel
);
1057 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1058 sizeof(fix
->reserved
));
1063 static int fb_get_fscreeninfo(struct inode
*inode
, struct file
*file
,
1064 unsigned int cmd
, unsigned long arg
)
1066 mm_segment_t old_fs
;
1067 struct fb_fix_screeninfo fix
;
1068 struct fb_fix_screeninfo32 __user
*fix32
;
1071 fix32
= compat_ptr(arg
);
1075 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) &fix
);
1079 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1085 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1087 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1088 int fbidx
= iminor(inode
);
1089 struct fb_info
*info
= registered_fb
[fbidx
];
1090 struct fb_ops
*fb
= info
->fbops
;
1091 long ret
= -ENOIOCTLCMD
;
1095 case FBIOGET_VSCREENINFO
:
1096 case FBIOPUT_VSCREENINFO
:
1097 case FBIOPAN_DISPLAY
:
1098 case FBIOGET_CON2FBMAP
:
1099 case FBIOPUT_CON2FBMAP
:
1100 arg
= (unsigned long) compat_ptr(arg
);
1102 ret
= fb_ioctl(inode
, file
, cmd
, arg
);
1105 case FBIOGET_FSCREENINFO
:
1106 ret
= fb_get_fscreeninfo(inode
, file
, cmd
, arg
);
1111 ret
= fb_getput_cmap(inode
, file
, cmd
, arg
);
1115 if (fb
->fb_compat_ioctl
)
1116 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1125 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1127 int fbidx
= iminor(file
->f_path
.dentry
->d_inode
);
1128 struct fb_info
*info
= registered_fb
[fbidx
];
1129 struct fb_ops
*fb
= info
->fbops
;
1131 #if !defined(__sparc__) || defined(__sparc_v9__)
1132 unsigned long start
;
1136 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1138 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1144 res
= fb
->fb_mmap(info
, vma
);
1149 #if defined(__sparc__) && !defined(__sparc_v9__)
1150 /* Should never get here, all fb drivers should have their own
1157 /* frame buffer memory */
1158 start
= info
->fix
.smem_start
;
1159 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1161 /* memory mapped io */
1163 if (info
->var
.accel_flags
) {
1167 start
= info
->fix
.mmio_start
;
1168 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1172 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1175 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1176 /* This is an IO map - tell maydump to skip this VMA */
1177 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1178 #if defined(__mc68000__)
1179 #if defined(CONFIG_SUN3)
1180 pgprot_val(vma
->vm_page_prot
) |= SUN3_PAGE_NOCACHE
;
1181 #elif defined(CONFIG_MMU)
1182 if (CPU_IS_020_OR_030
)
1183 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE030
;
1184 if (CPU_IS_040_OR_060
) {
1185 pgprot_val(vma
->vm_page_prot
) &= _CACHEMASK040
;
1186 /* Use no-cache mode, serialized */
1187 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE_S
;
1190 #elif defined(__powerpc__)
1191 vma
->vm_page_prot
= phys_mem_access_prot(file
, off
>> PAGE_SHIFT
,
1192 vma
->vm_end
- vma
->vm_start
,
1194 #elif defined(__alpha__)
1195 /* Caching is off in the I/O space quadrant by design. */
1196 #elif defined(__i386__) || defined(__x86_64__)
1197 if (boot_cpu_data
.x86
> 3)
1198 pgprot_val(vma
->vm_page_prot
) |= _PAGE_PCD
;
1199 #elif defined(__mips__) || defined(__sparc_v9__)
1200 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
1201 #elif defined(__hppa__)
1202 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NO_CACHE
;
1203 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1204 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
1205 #elif defined(__ia64__)
1206 if (efi_range_is_wc(vma
->vm_start
, vma
->vm_end
- vma
->vm_start
))
1207 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
1209 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
1211 #warning What do we have to do here??
1213 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1214 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1217 #endif /* !sparc32 */
1221 fb_open(struct inode
*inode
, struct file
*file
)
1223 int fbidx
= iminor(inode
);
1224 struct fb_info
*info
;
1227 if (fbidx
>= FB_MAX
)
1230 if (!(info
= registered_fb
[fbidx
]))
1232 #endif /* CONFIG_KMOD */
1233 if (!(info
= registered_fb
[fbidx
]))
1235 if (!try_module_get(info
->fbops
->owner
))
1237 file
->private_data
= info
;
1238 if (info
->fbops
->fb_open
) {
1239 res
= info
->fbops
->fb_open(info
,1);
1241 module_put(info
->fbops
->owner
);
1247 fb_release(struct inode
*inode
, struct file
*file
)
1249 struct fb_info
* const info
= file
->private_data
;
1252 if (info
->fbops
->fb_release
)
1253 info
->fbops
->fb_release(info
,1);
1254 module_put(info
->fbops
->owner
);
1259 static const struct file_operations fb_fops
= {
1260 .owner
= THIS_MODULE
,
1264 #ifdef CONFIG_COMPAT
1265 .compat_ioctl
= fb_compat_ioctl
,
1269 .release
= fb_release
,
1270 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1271 .get_unmapped_area
= get_fb_unmapped_area
,
1273 #ifdef CONFIG_FB_DEFERRED_IO
1274 .fsync
= fb_deferred_io_fsync
,
1278 struct class *fb_class
;
1279 EXPORT_SYMBOL(fb_class
);
1281 * register_framebuffer - registers a frame buffer device
1282 * @fb_info: frame buffer info structure
1284 * Registers a frame buffer device @fb_info.
1286 * Returns negative errno on error, or zero for success.
1291 register_framebuffer(struct fb_info
*fb_info
)
1294 struct fb_event event
;
1295 struct fb_videomode mode
;
1297 if (num_registered_fb
== FB_MAX
)
1299 num_registered_fb
++;
1300 for (i
= 0 ; i
< FB_MAX
; i
++)
1301 if (!registered_fb
[i
])
1305 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1306 MKDEV(FB_MAJOR
, i
), "fb%d", i
);
1307 if (IS_ERR(fb_info
->dev
)) {
1309 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1310 fb_info
->dev
= NULL
;
1312 fb_init_device(fb_info
);
1314 if (fb_info
->pixmap
.addr
== NULL
) {
1315 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1316 if (fb_info
->pixmap
.addr
) {
1317 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1318 fb_info
->pixmap
.buf_align
= 1;
1319 fb_info
->pixmap
.scan_align
= 1;
1320 fb_info
->pixmap
.access_align
= 32;
1321 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1324 fb_info
->pixmap
.offset
= 0;
1326 if (!fb_info
->pixmap
.blit_x
)
1327 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1329 if (!fb_info
->pixmap
.blit_y
)
1330 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1332 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1333 INIT_LIST_HEAD(&fb_info
->modelist
);
1335 fb_var_to_videomode(&mode
, &fb_info
->var
);
1336 fb_add_videomode(&mode
, &fb_info
->modelist
);
1337 registered_fb
[i
] = fb_info
;
1339 event
.info
= fb_info
;
1340 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1346 * unregister_framebuffer - releases a frame buffer device
1347 * @fb_info: frame buffer info structure
1349 * Unregisters a frame buffer device @fb_info.
1351 * Returns negative errno on error, or zero for success.
1356 unregister_framebuffer(struct fb_info
*fb_info
)
1358 struct fb_event event
;
1362 if (!registered_fb
[i
])
1365 if (fb_info
->pixmap
.addr
&&
1366 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1367 kfree(fb_info
->pixmap
.addr
);
1368 fb_destroy_modelist(&fb_info
->modelist
);
1369 registered_fb
[i
]=NULL
;
1370 num_registered_fb
--;
1371 fb_cleanup_device(fb_info
);
1372 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1373 event
.info
= fb_info
;
1374 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1379 * fb_set_suspend - low level driver signals suspend
1380 * @info: framebuffer affected
1381 * @state: 0 = resuming, !=0 = suspending
1383 * This is meant to be used by low level drivers to
1384 * signal suspend/resume to the core & clients.
1385 * It must be called with the console semaphore held
1387 void fb_set_suspend(struct fb_info
*info
, int state
)
1389 struct fb_event event
;
1393 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1394 info
->state
= FBINFO_STATE_SUSPENDED
;
1396 info
->state
= FBINFO_STATE_RUNNING
;
1397 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1402 * fbmem_init - init frame buffer subsystem
1404 * Initialize the frame buffer subsystem.
1406 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1413 create_proc_read_entry("fb", 0, NULL
, fbmem_read_proc
, NULL
);
1415 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1416 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1418 fb_class
= class_create(THIS_MODULE
, "graphics");
1419 if (IS_ERR(fb_class
)) {
1420 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1427 module_init(fbmem_init
);
1431 class_destroy(fb_class
);
1432 unregister_chrdev(FB_MAJOR
, "fb");
1435 module_exit(fbmem_exit
);
1436 MODULE_LICENSE("GPL");
1437 MODULE_DESCRIPTION("Framebuffer base");
1439 subsys_initcall(fbmem_init
);
1442 int fb_new_modelist(struct fb_info
*info
)
1444 struct fb_event event
;
1445 struct fb_var_screeninfo var
= info
->var
;
1446 struct list_head
*pos
, *n
;
1447 struct fb_modelist
*modelist
;
1448 struct fb_videomode
*m
, mode
;
1451 list_for_each_safe(pos
, n
, &info
->modelist
) {
1452 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1453 m
= &modelist
->mode
;
1454 fb_videomode_to_var(&var
, m
);
1455 var
.activate
= FB_ACTIVATE_TEST
;
1456 err
= fb_set_var(info
, &var
);
1457 fb_var_to_videomode(&mode
, &var
);
1458 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1466 if (!list_empty(&info
->modelist
)) {
1468 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1474 static char *video_options
[FB_MAX
] __read_mostly
;
1475 static int ofonly __read_mostly
;
1477 extern const char *global_mode_option
;
1480 * fb_get_options - get kernel boot parameters
1481 * @name: framebuffer name as it would appear in
1482 * the boot parameter line
1483 * (video=<name>:<options>)
1484 * @option: the option will be stored here
1486 * NOTE: Needed to maintain backwards compatibility
1488 int fb_get_options(char *name
, char **option
)
1490 char *opt
, *options
= NULL
;
1491 int opt_len
, retval
= 0;
1492 int name_len
= strlen(name
), i
;
1494 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1497 if (name_len
&& !retval
) {
1498 for (i
= 0; i
< FB_MAX
; i
++) {
1499 if (video_options
[i
] == NULL
)
1501 opt_len
= strlen(video_options
[i
]);
1504 opt
= video_options
[i
];
1505 if (!strncmp(name
, opt
, name_len
) &&
1506 opt
[name_len
] == ':')
1507 options
= opt
+ name_len
+ 1;
1510 if (options
&& !strncmp(options
, "off", 3))
1521 * video_setup - process command line options
1522 * @options: string of options
1524 * Process command line options for frame buffer subsystem.
1526 * NOTE: This function is a __setup and __init function.
1527 * It only stores the options. Drivers have to call
1528 * fb_get_options() as necessary.
1533 static int __init
video_setup(char *options
)
1537 if (!options
|| !*options
)
1540 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1545 if (!global
&& !strstr(options
, "fb:")) {
1546 global_mode_option
= options
;
1551 for (i
= 0; i
< FB_MAX
; i
++) {
1552 if (video_options
[i
] == NULL
) {
1553 video_options
[i
] = options
;
1562 __setup("video=", video_setup
);
1566 * Visible symbols for modules
1569 EXPORT_SYMBOL(register_framebuffer
);
1570 EXPORT_SYMBOL(unregister_framebuffer
);
1571 EXPORT_SYMBOL(num_registered_fb
);
1572 EXPORT_SYMBOL(registered_fb
);
1573 EXPORT_SYMBOL(fb_prepare_logo
);
1574 EXPORT_SYMBOL(fb_show_logo
);
1575 EXPORT_SYMBOL(fb_set_var
);
1576 EXPORT_SYMBOL(fb_blank
);
1577 EXPORT_SYMBOL(fb_pan_display
);
1578 EXPORT_SYMBOL(fb_get_buffer_offset
);
1579 EXPORT_SYMBOL(fb_set_suspend
);
1580 EXPORT_SYMBOL(fb_get_options
);
1582 MODULE_LICENSE("GPL");