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/config.h>
15 #include <linux/module.h>
17 #include <linux/compat.h>
18 #include <linux/types.h>
19 #include <linux/errno.h>
20 #include <linux/sched.h>
21 #include <linux/smp_lock.h>
22 #include <linux/kernel.h>
23 #include <linux/major.h>
24 #include <linux/slab.h>
26 #include <linux/mman.h>
27 #include <linux/tty.h>
28 #include <linux/init.h>
29 #include <linux/linux_logo.h>
30 #include <linux/proc_fs.h>
31 #include <linux/console.h>
33 #include <linux/kmod.h>
35 #include <linux/err.h>
36 #include <linux/device.h>
37 #include <linux/efi.h>
39 #if defined(__mc68000__) || defined(CONFIG_APUS)
40 #include <asm/setup.h>
44 #include <asm/uaccess.h>
46 #include <asm/pgtable.h>
51 * Frame buffer device initialization and setup routines
54 #define FBPIXMAPSIZE (1024 * 8)
56 static BLOCKING_NOTIFIER_HEAD(fb_notifier_list
);
57 struct fb_info
*registered_fb
[FB_MAX
];
58 int num_registered_fb
;
64 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
65 struct fb_fix_screeninfo
*fix
)
69 if (fix
->visual
== FB_VISUAL_MONO01
||
70 fix
->visual
== FB_VISUAL_MONO10
)
73 if (var
->green
.length
== var
->blue
.length
&&
74 var
->green
.length
== var
->red
.length
&&
75 var
->green
.offset
== var
->blue
.offset
&&
76 var
->green
.offset
== var
->red
.offset
)
77 depth
= var
->green
.length
;
79 depth
= var
->green
.length
+ var
->red
.length
+
85 EXPORT_SYMBOL(fb_get_color_depth
);
88 * Data padding functions.
90 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
92 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
94 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
96 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
97 u32 shift_high
, u32 shift_low
, u32 mod
)
99 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
102 for (i
= height
; i
--; ) {
103 for (j
= 0; j
< idx
; j
++) {
106 tmp
|= *src
>> shift_low
;
108 tmp
= *src
<< shift_high
;
114 tmp
|= *src
>> shift_low
;
116 if (shift_high
< mod
) {
117 tmp
= *src
<< shift_high
;
124 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
127 * we need to lock this section since fb_cursor
128 * may use fb_imageblit()
130 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
132 u32 align
= buf
->buf_align
- 1, offset
;
133 char *addr
= buf
->addr
;
135 /* If IO mapped, we need to sync before access, no sharing of
138 if (buf
->flags
& FB_PIXMAP_IO
) {
139 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
140 info
->fbops
->fb_sync(info
);
144 /* See if we fit in the remaining pixmap space */
145 offset
= buf
->offset
+ align
;
147 if (offset
+ size
> buf
->size
) {
148 /* We do not fit. In order to be able to re-use the buffer,
149 * we must ensure no asynchronous DMA'ing or whatever operation
150 * is in progress, we sync for that.
152 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
153 info
->fbops
->fb_sync(info
);
156 buf
->offset
= offset
+ size
;
164 static inline unsigned safe_shift(unsigned d
, int n
)
166 return n
< 0 ? d
>> -n
: d
<< n
;
169 static void fb_set_logocmap(struct fb_info
*info
,
170 const struct linux_logo
*logo
)
172 struct fb_cmap palette_cmap
;
173 u16 palette_green
[16];
174 u16 palette_blue
[16];
177 const unsigned char *clut
= logo
->clut
;
179 palette_cmap
.start
= 0;
180 palette_cmap
.len
= 16;
181 palette_cmap
.red
= palette_red
;
182 palette_cmap
.green
= palette_green
;
183 palette_cmap
.blue
= palette_blue
;
184 palette_cmap
.transp
= NULL
;
186 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
187 n
= logo
->clutsize
- i
;
188 /* palette_cmap provides space for only 16 colors at once */
191 palette_cmap
.start
= 32 + i
;
192 palette_cmap
.len
= n
;
193 for (j
= 0; j
< n
; ++j
) {
194 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
195 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
196 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
199 fb_set_cmap(&palette_cmap
, info
);
203 static void fb_set_logo_truepalette(struct fb_info
*info
,
204 const struct linux_logo
*logo
,
207 unsigned char mask
[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
208 unsigned char redmask
, greenmask
, bluemask
;
209 int redshift
, greenshift
, blueshift
;
211 const unsigned char *clut
= logo
->clut
;
214 * We have to create a temporary palette since console palette is only
217 /* Bug: Doesn't obey msb_right ... (who needs that?) */
218 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
219 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
220 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
221 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
222 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
223 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
225 for ( i
= 0; i
< logo
->clutsize
; i
++) {
226 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
227 safe_shift((clut
[1] & greenmask
), greenshift
) |
228 safe_shift((clut
[2] & bluemask
), blueshift
));
233 static void fb_set_logo_directpalette(struct fb_info
*info
,
234 const struct linux_logo
*logo
,
237 int redshift
, greenshift
, blueshift
;
240 redshift
= info
->var
.red
.offset
;
241 greenshift
= info
->var
.green
.offset
;
242 blueshift
= info
->var
.blue
.offset
;
244 for (i
= 32; i
< logo
->clutsize
; i
++)
245 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
248 static void fb_set_logo(struct fb_info
*info
,
249 const struct linux_logo
*logo
, u8
*dst
,
253 const u8
*src
= logo
->data
;
254 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
257 if (fb_get_color_depth(&info
->var
, &info
->fix
) == 3)
260 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
261 info
->fix
.visual
== FB_VISUAL_MONO10
)
262 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
266 for (i
= 0; i
< logo
->height
; i
++)
267 for (j
= 0; j
< logo
->width
; src
++) {
270 if (j
< logo
->width
) {
271 *dst
++ = *src
& 0x0f;
277 for (i
= 0; i
< logo
->height
; i
++) {
278 for (j
= 0; j
< logo
->width
; src
++) {
280 for (k
= 7; k
>= 0; k
--) {
281 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
291 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
292 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
293 * the visual format and color depth of the framebuffer, the DAC, the
294 * pseudo_palette, and the logo data will be adjusted accordingly.
296 * Case 1 - linux_logo_clut224:
297 * Color exceeds the number of console colors (16), thus we set the hardware DAC
298 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
300 * For visuals that require color info from the pseudo_palette, we also construct
301 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
304 * Case 2 - linux_logo_vga16:
305 * The number of colors just matches the console colors, thus there is no need
306 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
307 * each byte contains color information for two pixels (upper and lower nibble).
308 * To be consistent with fb_imageblit() usage, we therefore separate the two
309 * nibbles into separate bytes. The "depth" flag will be set to 4.
311 * Case 3 - linux_logo_mono:
312 * This is similar with Case 2. Each byte contains information for 8 pixels.
313 * We isolate each bit and expand each into a byte. The "depth" flag will
316 static struct logo_data
{
318 int needs_directpalette
;
319 int needs_truepalette
;
321 const struct linux_logo
*logo
;
324 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
326 u32 size
= width
* height
, i
;
330 for (i
= size
; i
--; )
334 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
336 int i
, j
, h
= height
- 1;
338 for (i
= 0; i
< height
; i
++)
339 for (j
= 0; j
< width
; j
++)
340 out
[height
* j
+ h
- i
] = *in
++;
343 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
345 int i
, j
, w
= width
- 1;
347 for (i
= 0; i
< height
; i
++)
348 for (j
= 0; j
< width
; j
++)
349 out
[height
* (w
- j
) + i
] = *in
++;
352 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
353 struct fb_image
*image
, int rotate
)
357 if (rotate
== FB_ROTATE_UD
) {
358 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
360 image
->dx
= info
->var
.xres
- image
->width
;
361 image
->dy
= info
->var
.yres
- image
->height
;
362 } else if (rotate
== FB_ROTATE_CW
) {
363 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
366 image
->width
= image
->height
;
368 image
->dx
= info
->var
.xres
- image
->width
;
369 } else if (rotate
== FB_ROTATE_CCW
) {
370 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
373 image
->width
= image
->height
;
375 image
->dy
= info
->var
.yres
- image
->height
;
381 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
386 if (rotate
== FB_ROTATE_UR
) {
387 for (x
= 0; x
< num_online_cpus() &&
388 x
* (fb_logo
.logo
->width
+ 8) <=
389 info
->var
.xres
- fb_logo
.logo
->width
; x
++) {
390 info
->fbops
->fb_imageblit(info
, image
);
391 image
->dx
+= fb_logo
.logo
->width
+ 8;
393 } else if (rotate
== FB_ROTATE_UD
) {
394 for (x
= 0; x
< num_online_cpus() &&
395 x
* (fb_logo
.logo
->width
+ 8) <=
396 info
->var
.xres
- fb_logo
.logo
->width
; x
++) {
397 info
->fbops
->fb_imageblit(info
, image
);
398 image
->dx
-= fb_logo
.logo
->width
+ 8;
400 } else if (rotate
== FB_ROTATE_CW
) {
401 for (x
= 0; x
< num_online_cpus() &&
402 x
* (fb_logo
.logo
->width
+ 8) <=
403 info
->var
.yres
- fb_logo
.logo
->width
; x
++) {
404 info
->fbops
->fb_imageblit(info
, image
);
405 image
->dy
+= fb_logo
.logo
->width
+ 8;
407 } else if (rotate
== FB_ROTATE_CCW
) {
408 for (x
= 0; x
< num_online_cpus() &&
409 x
* (fb_logo
.logo
->width
+ 8) <=
410 info
->var
.yres
- fb_logo
.logo
->width
; x
++) {
411 info
->fbops
->fb_imageblit(info
, image
);
412 image
->dy
-= fb_logo
.logo
->width
+ 8;
417 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
419 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
422 memset(&fb_logo
, 0, sizeof(struct logo_data
));
424 if (info
->flags
& FBINFO_MISC_TILEBLITTING
)
427 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
428 depth
= info
->var
.blue
.length
;
429 if (info
->var
.red
.length
< depth
)
430 depth
= info
->var
.red
.length
;
431 if (info
->var
.green
.length
< depth
)
432 depth
= info
->var
.green
.length
;
435 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
436 /* assume console colormap */
441 switch (info
->fix
.visual
) {
442 case FB_VISUAL_TRUECOLOR
:
443 fb_logo
.needs_truepalette
= 1;
445 case FB_VISUAL_DIRECTCOLOR
:
446 fb_logo
.needs_directpalette
= 1;
447 fb_logo
.needs_cmapreset
= 1;
449 case FB_VISUAL_PSEUDOCOLOR
:
450 fb_logo
.needs_cmapreset
= 1;
455 /* Return if no suitable logo was found */
456 fb_logo
.logo
= fb_find_logo(depth
);
462 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
463 yres
= info
->var
.yres
;
465 yres
= info
->var
.xres
;
467 if (fb_logo
.logo
->height
> yres
) {
472 /* What depth we asked for might be different from what we get */
473 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
475 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
479 return fb_logo
.logo
->height
;
482 int fb_show_logo(struct fb_info
*info
, int rotate
)
484 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
485 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
486 struct fb_image image
;
488 /* Return if the frame buffer is not mapped or suspended */
489 if (fb_logo
.logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
)
493 image
.data
= fb_logo
.logo
->data
;
495 if (fb_logo
.needs_cmapreset
)
496 fb_set_logocmap(info
, fb_logo
.logo
);
498 if (fb_logo
.needs_truepalette
||
499 fb_logo
.needs_directpalette
) {
500 palette
= kmalloc(256 * 4, GFP_KERNEL
);
504 if (fb_logo
.needs_truepalette
)
505 fb_set_logo_truepalette(info
, fb_logo
.logo
, palette
);
507 fb_set_logo_directpalette(info
, fb_logo
.logo
, palette
);
509 saved_pseudo_palette
= info
->pseudo_palette
;
510 info
->pseudo_palette
= palette
;
513 if (fb_logo
.depth
<= 4) {
514 logo_new
= kmalloc(fb_logo
.logo
->width
* fb_logo
.logo
->height
,
516 if (logo_new
== NULL
) {
518 if (saved_pseudo_palette
)
519 info
->pseudo_palette
= saved_pseudo_palette
;
522 image
.data
= logo_new
;
523 fb_set_logo(info
, fb_logo
.logo
, logo_new
, fb_logo
.depth
);
528 image
.width
= fb_logo
.logo
->width
;
529 image
.height
= fb_logo
.logo
->height
;
532 logo_rotate
= kmalloc(fb_logo
.logo
->width
*
533 fb_logo
.logo
->height
, GFP_KERNEL
);
535 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
538 fb_do_show_logo(info
, &image
, rotate
);
541 if (saved_pseudo_palette
!= NULL
)
542 info
->pseudo_palette
= saved_pseudo_palette
;
545 return fb_logo
.logo
->height
;
548 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
549 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
550 #endif /* CONFIG_LOGO */
552 static int fbmem_read_proc(char *buf
, char **start
, off_t offset
,
553 int len
, int *eof
, void *private)
559 for (fi
= registered_fb
; fi
< ®istered_fb
[FB_MAX
] && len
< 4000; fi
++)
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_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(file
, 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_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(file
, 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
= blocking_notifier_call_chain(&fb_notifier_list
,
796 FB_EVENT_MODE_DELETE
, &event
);
800 fb_delete_videomode(&mode1
, &info
->modelist
);
805 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
806 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
807 if (!info
->fbops
->fb_check_var
) {
812 if ((err
= info
->fbops
->fb_check_var(var
, info
)))
815 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
816 struct fb_videomode mode
;
820 if (info
->fbops
->fb_set_par
)
821 info
->fbops
->fb_set_par(info
);
823 fb_pan_display(info
, &info
->var
);
825 fb_set_cmap(&info
->cmap
, info
);
827 fb_var_to_videomode(&mode
, &info
->var
);
829 if (info
->modelist
.prev
&& info
->modelist
.next
&&
830 !list_empty(&info
->modelist
))
831 err
= fb_add_videomode(&mode
, &info
->modelist
);
833 if (!err
&& (flags
& FBINFO_MISC_USEREVENT
)) {
834 struct fb_event event
;
835 int evnt
= (var
->activate
& FB_ACTIVATE_ALL
) ?
836 FB_EVENT_MODE_CHANGE_ALL
:
837 FB_EVENT_MODE_CHANGE
;
839 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
841 blocking_notifier_call_chain(&fb_notifier_list
,
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 blocking_notifier_call_chain(&fb_notifier_list
,
866 FB_EVENT_BLANK
, &event
);
873 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
876 int fbidx
= iminor(inode
);
877 struct fb_info
*info
= registered_fb
[fbidx
];
878 struct fb_ops
*fb
= info
->fbops
;
879 struct fb_var_screeninfo var
;
880 struct fb_fix_screeninfo fix
;
881 struct fb_con2fbmap con2fb
;
882 struct fb_cmap_user cmap
;
883 struct fb_event event
;
884 void __user
*argp
= (void __user
*)arg
;
890 case FBIOGET_VSCREENINFO
:
891 return copy_to_user(argp
, &info
->var
,
892 sizeof(var
)) ? -EFAULT
: 0;
893 case FBIOPUT_VSCREENINFO
:
894 if (copy_from_user(&var
, argp
, sizeof(var
)))
896 acquire_console_sem();
897 info
->flags
|= FBINFO_MISC_USEREVENT
;
898 i
= fb_set_var(info
, &var
);
899 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
900 release_console_sem();
902 if (copy_to_user(argp
, &var
, sizeof(var
)))
905 case FBIOGET_FSCREENINFO
:
906 return copy_to_user(argp
, &info
->fix
,
907 sizeof(fix
)) ? -EFAULT
: 0;
909 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
911 return (fb_set_user_cmap(&cmap
, info
));
913 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
915 return fb_cmap_to_user(&info
->cmap
, &cmap
);
916 case FBIOPAN_DISPLAY
:
917 if (copy_from_user(&var
, argp
, sizeof(var
)))
919 acquire_console_sem();
920 i
= fb_pan_display(info
, &var
);
921 release_console_sem();
924 if (copy_to_user(argp
, &var
, sizeof(var
)))
929 case FBIOGET_CON2FBMAP
:
930 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
932 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
934 con2fb
.framebuffer
= -1;
936 event
.data
= &con2fb
;
937 blocking_notifier_call_chain(&fb_notifier_list
,
938 FB_EVENT_GET_CONSOLE_MAP
, &event
);
939 return copy_to_user(argp
, &con2fb
,
940 sizeof(con2fb
)) ? -EFAULT
: 0;
941 case FBIOPUT_CON2FBMAP
:
942 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
944 if (con2fb
.console
< 0 || con2fb
.console
> MAX_NR_CONSOLES
)
946 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
949 if (!registered_fb
[con2fb
.framebuffer
])
950 try_to_load(con2fb
.framebuffer
);
951 #endif /* CONFIG_KMOD */
952 if (!registered_fb
[con2fb
.framebuffer
])
955 event
.data
= &con2fb
;
956 return blocking_notifier_call_chain(&fb_notifier_list
,
957 FB_EVENT_SET_CONSOLE_MAP
,
960 acquire_console_sem();
961 info
->flags
|= FBINFO_MISC_USEREVENT
;
962 i
= fb_blank(info
, arg
);
963 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
964 release_console_sem();
967 if (fb
->fb_ioctl
== NULL
)
969 return fb
->fb_ioctl(info
, cmd
, arg
);
974 struct fb_fix_screeninfo32
{
976 compat_caddr_t smem_start
;
985 compat_caddr_t mmio_start
;
995 compat_caddr_t green
;
997 compat_caddr_t transp
;
1000 static int fb_getput_cmap(struct inode
*inode
, struct file
*file
,
1001 unsigned int cmd
, unsigned long arg
)
1003 struct fb_cmap_user __user
*cmap
;
1004 struct fb_cmap32 __user
*cmap32
;
1008 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1009 cmap32
= compat_ptr(arg
);
1011 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1014 if (get_user(data
, &cmap32
->red
) ||
1015 put_user(compat_ptr(data
), &cmap
->red
) ||
1016 get_user(data
, &cmap32
->green
) ||
1017 put_user(compat_ptr(data
), &cmap
->green
) ||
1018 get_user(data
, &cmap32
->blue
) ||
1019 put_user(compat_ptr(data
), &cmap
->blue
) ||
1020 get_user(data
, &cmap32
->transp
) ||
1021 put_user(compat_ptr(data
), &cmap
->transp
))
1024 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) cmap
);
1027 if (copy_in_user(&cmap32
->start
,
1035 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1036 struct fb_fix_screeninfo32 __user
*fix32
)
1041 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1043 data
= (__u32
) (unsigned long) fix
->smem_start
;
1044 err
|= put_user(data
, &fix32
->smem_start
);
1046 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1047 err
|= put_user(fix
->type
, &fix32
->type
);
1048 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1049 err
|= put_user(fix
->visual
, &fix32
->visual
);
1050 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1051 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1052 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1053 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1055 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1056 err
|= put_user(data
, &fix32
->mmio_start
);
1058 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1059 err
|= put_user(fix
->accel
, &fix32
->accel
);
1060 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1061 sizeof(fix
->reserved
));
1066 static int fb_get_fscreeninfo(struct inode
*inode
, struct file
*file
,
1067 unsigned int cmd
, unsigned long arg
)
1069 mm_segment_t old_fs
;
1070 struct fb_fix_screeninfo fix
;
1071 struct fb_fix_screeninfo32 __user
*fix32
;
1074 fix32
= compat_ptr(arg
);
1078 err
= fb_ioctl(inode
, file
, cmd
, (unsigned long) &fix
);
1082 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1088 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1090 struct inode
*inode
= file
->f_dentry
->d_inode
;
1091 int fbidx
= iminor(inode
);
1092 struct fb_info
*info
= registered_fb
[fbidx
];
1093 struct fb_ops
*fb
= info
->fbops
;
1094 long ret
= -ENOIOCTLCMD
;
1098 case FBIOGET_VSCREENINFO
:
1099 case FBIOPUT_VSCREENINFO
:
1100 case FBIOPAN_DISPLAY
:
1101 case FBIOGET_CON2FBMAP
:
1102 case FBIOPUT_CON2FBMAP
:
1103 arg
= (unsigned long) compat_ptr(arg
);
1105 ret
= fb_ioctl(inode
, file
, cmd
, arg
);
1108 case FBIOGET_FSCREENINFO
:
1109 ret
= fb_get_fscreeninfo(inode
, file
, cmd
, arg
);
1114 ret
= fb_getput_cmap(inode
, file
, cmd
, arg
);
1118 if (fb
->fb_compat_ioctl
)
1119 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1128 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1130 int fbidx
= iminor(file
->f_dentry
->d_inode
);
1131 struct fb_info
*info
= registered_fb
[fbidx
];
1132 struct fb_ops
*fb
= info
->fbops
;
1134 #if !defined(__sparc__) || defined(__sparc_v9__)
1135 unsigned long start
;
1139 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1141 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1147 res
= fb
->fb_mmap(info
, vma
);
1152 #if defined(__sparc__) && !defined(__sparc_v9__)
1153 /* Should never get here, all fb drivers should have their own
1160 /* frame buffer memory */
1161 start
= info
->fix
.smem_start
;
1162 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1164 /* memory mapped io */
1166 if (info
->var
.accel_flags
) {
1170 start
= info
->fix
.mmio_start
;
1171 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1175 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1178 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1179 /* This is an IO map - tell maydump to skip this VMA */
1180 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1181 #if defined(__mc68000__)
1182 #if defined(CONFIG_SUN3)
1183 pgprot_val(vma
->vm_page_prot
) |= SUN3_PAGE_NOCACHE
;
1184 #elif defined(CONFIG_MMU)
1185 if (CPU_IS_020_OR_030
)
1186 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE030
;
1187 if (CPU_IS_040_OR_060
) {
1188 pgprot_val(vma
->vm_page_prot
) &= _CACHEMASK040
;
1189 /* Use no-cache mode, serialized */
1190 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE_S
;
1193 #elif defined(__powerpc__)
1194 vma
->vm_page_prot
= phys_mem_access_prot(file
, off
>> PAGE_SHIFT
,
1195 vma
->vm_end
- vma
->vm_start
,
1197 #elif defined(__alpha__)
1198 /* Caching is off in the I/O space quadrant by design. */
1199 #elif defined(__i386__) || defined(__x86_64__)
1200 if (boot_cpu_data
.x86
> 3)
1201 pgprot_val(vma
->vm_page_prot
) |= _PAGE_PCD
;
1202 #elif defined(__mips__) || defined(__sparc_v9__)
1203 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
1204 #elif defined(__hppa__)
1205 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NO_CACHE
;
1206 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1207 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
1208 #elif defined(__ia64__)
1209 if (efi_range_is_wc(vma
->vm_start
, vma
->vm_end
- vma
->vm_start
))
1210 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
1212 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
1214 #warning What do we have to do here??
1216 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1217 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1220 #endif /* !sparc32 */
1224 fb_open(struct inode
*inode
, struct file
*file
)
1226 int fbidx
= iminor(inode
);
1227 struct fb_info
*info
;
1230 if (fbidx
>= FB_MAX
)
1233 if (!(info
= registered_fb
[fbidx
]))
1235 #endif /* CONFIG_KMOD */
1236 if (!(info
= registered_fb
[fbidx
]))
1238 if (!try_module_get(info
->fbops
->owner
))
1240 file
->private_data
= info
;
1241 if (info
->fbops
->fb_open
) {
1242 res
= info
->fbops
->fb_open(info
,1);
1244 module_put(info
->fbops
->owner
);
1250 fb_release(struct inode
*inode
, struct file
*file
)
1252 struct fb_info
* const info
= file
->private_data
;
1255 if (info
->fbops
->fb_release
)
1256 info
->fbops
->fb_release(info
,1);
1257 module_put(info
->fbops
->owner
);
1262 static struct file_operations fb_fops
= {
1263 .owner
= THIS_MODULE
,
1267 #ifdef CONFIG_COMPAT
1268 .compat_ioctl
= fb_compat_ioctl
,
1272 .release
= fb_release
,
1273 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1274 .get_unmapped_area
= get_fb_unmapped_area
,
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
->class_device
= class_device_create(fb_class
, NULL
, MKDEV(FB_MAJOR
, i
),
1306 fb_info
->device
, "fb%d", i
);
1307 if (IS_ERR(fb_info
->class_device
)) {
1309 printk(KERN_WARNING
"Unable to create class_device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->class_device
));
1310 fb_info
->class_device
= NULL
;
1312 fb_init_class_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
->modelist
.prev
|| !fb_info
->modelist
.next
)
1327 INIT_LIST_HEAD(&fb_info
->modelist
);
1329 fb_var_to_videomode(&mode
, &fb_info
->var
);
1330 fb_add_videomode(&mode
, &fb_info
->modelist
);
1331 registered_fb
[i
] = fb_info
;
1333 event
.info
= fb_info
;
1334 blocking_notifier_call_chain(&fb_notifier_list
,
1335 FB_EVENT_FB_REGISTERED
, &event
);
1341 * unregister_framebuffer - releases a frame buffer device
1342 * @fb_info: frame buffer info structure
1344 * Unregisters a frame buffer device @fb_info.
1346 * Returns negative errno on error, or zero for success.
1351 unregister_framebuffer(struct fb_info
*fb_info
)
1353 struct fb_event event
;
1357 if (!registered_fb
[i
])
1360 if (fb_info
->pixmap
.addr
&&
1361 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1362 kfree(fb_info
->pixmap
.addr
);
1363 fb_destroy_modelist(&fb_info
->modelist
);
1364 registered_fb
[i
]=NULL
;
1365 num_registered_fb
--;
1366 fb_cleanup_class_device(fb_info
);
1367 class_device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1368 event
.info
= fb_info
;
1369 blocking_notifier_call_chain(&fb_notifier_list
,
1370 FB_EVENT_FB_UNREGISTERED
, &event
);
1375 * fb_register_client - register a client notifier
1376 * @nb: notifier block to callback on events
1378 int fb_register_client(struct notifier_block
*nb
)
1380 return blocking_notifier_chain_register(&fb_notifier_list
, nb
);
1384 * fb_unregister_client - unregister a client notifier
1385 * @nb: notifier block to callback on events
1387 int fb_unregister_client(struct notifier_block
*nb
)
1389 return blocking_notifier_chain_unregister(&fb_notifier_list
, nb
);
1393 * fb_set_suspend - low level driver signals suspend
1394 * @info: framebuffer affected
1395 * @state: 0 = resuming, !=0 = suspending
1397 * This is meant to be used by low level drivers to
1398 * signal suspend/resume to the core & clients.
1399 * It must be called with the console semaphore held
1401 void fb_set_suspend(struct fb_info
*info
, int state
)
1403 struct fb_event event
;
1407 blocking_notifier_call_chain(&fb_notifier_list
,
1408 FB_EVENT_SUSPEND
, &event
);
1409 info
->state
= FBINFO_STATE_SUSPENDED
;
1411 info
->state
= FBINFO_STATE_RUNNING
;
1412 blocking_notifier_call_chain(&fb_notifier_list
,
1413 FB_EVENT_RESUME
, &event
);
1418 * fbmem_init - init frame buffer subsystem
1420 * Initialize the frame buffer subsystem.
1422 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1429 create_proc_read_entry("fb", 0, NULL
, fbmem_read_proc
, NULL
);
1431 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1432 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1434 fb_class
= class_create(THIS_MODULE
, "graphics");
1435 if (IS_ERR(fb_class
)) {
1436 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1443 module_init(fbmem_init
);
1447 class_destroy(fb_class
);
1448 unregister_chrdev(FB_MAJOR
, "fb");
1451 module_exit(fbmem_exit
);
1452 MODULE_LICENSE("GPL");
1453 MODULE_DESCRIPTION("Framebuffer base");
1455 subsys_initcall(fbmem_init
);
1458 int fb_new_modelist(struct fb_info
*info
)
1460 struct fb_event event
;
1461 struct fb_var_screeninfo var
= info
->var
;
1462 struct list_head
*pos
, *n
;
1463 struct fb_modelist
*modelist
;
1464 struct fb_videomode
*m
, mode
;
1467 list_for_each_safe(pos
, n
, &info
->modelist
) {
1468 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1469 m
= &modelist
->mode
;
1470 fb_videomode_to_var(&var
, m
);
1471 var
.activate
= FB_ACTIVATE_TEST
;
1472 err
= fb_set_var(info
, &var
);
1473 fb_var_to_videomode(&mode
, &var
);
1474 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1482 if (!list_empty(&info
->modelist
)) {
1484 err
= blocking_notifier_call_chain(&fb_notifier_list
,
1485 FB_EVENT_NEW_MODELIST
,
1492 static char *video_options
[FB_MAX
];
1495 extern const char *global_mode_option
;
1498 * fb_get_options - get kernel boot parameters
1499 * @name: framebuffer name as it would appear in
1500 * the boot parameter line
1501 * (video=<name>:<options>)
1502 * @option: the option will be stored here
1504 * NOTE: Needed to maintain backwards compatibility
1506 int fb_get_options(char *name
, char **option
)
1508 char *opt
, *options
= NULL
;
1509 int opt_len
, retval
= 0;
1510 int name_len
= strlen(name
), i
;
1512 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1515 if (name_len
&& !retval
) {
1516 for (i
= 0; i
< FB_MAX
; i
++) {
1517 if (video_options
[i
] == NULL
)
1519 opt_len
= strlen(video_options
[i
]);
1522 opt
= video_options
[i
];
1523 if (!strncmp(name
, opt
, name_len
) &&
1524 opt
[name_len
] == ':')
1525 options
= opt
+ name_len
+ 1;
1528 if (options
&& !strncmp(options
, "off", 3))
1539 * video_setup - process command line options
1540 * @options: string of options
1542 * Process command line options for frame buffer subsystem.
1544 * NOTE: This function is a __setup and __init function.
1545 * It only stores the options. Drivers have to call
1546 * fb_get_options() as necessary.
1551 static int __init
video_setup(char *options
)
1555 if (!options
|| !*options
)
1558 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1563 if (!global
&& !strstr(options
, "fb:")) {
1564 global_mode_option
= options
;
1569 for (i
= 0; i
< FB_MAX
; i
++) {
1570 if (video_options
[i
] == NULL
) {
1571 video_options
[i
] = options
;
1580 __setup("video=", video_setup
);
1584 * Visible symbols for modules
1587 EXPORT_SYMBOL(register_framebuffer
);
1588 EXPORT_SYMBOL(unregister_framebuffer
);
1589 EXPORT_SYMBOL(num_registered_fb
);
1590 EXPORT_SYMBOL(registered_fb
);
1591 EXPORT_SYMBOL(fb_prepare_logo
);
1592 EXPORT_SYMBOL(fb_show_logo
);
1593 EXPORT_SYMBOL(fb_set_var
);
1594 EXPORT_SYMBOL(fb_blank
);
1595 EXPORT_SYMBOL(fb_pan_display
);
1596 EXPORT_SYMBOL(fb_get_buffer_offset
);
1597 EXPORT_SYMBOL(fb_set_suspend
);
1598 EXPORT_SYMBOL(fb_register_client
);
1599 EXPORT_SYMBOL(fb_unregister_client
);
1600 EXPORT_SYMBOL(fb_get_options
);
1602 MODULE_LICENSE("GPL");