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/kernel.h>
20 #include <linux/major.h>
21 #include <linux/slab.h>
23 #include <linux/mman.h>
25 #include <linux/init.h>
26 #include <linux/linux_logo.h>
27 #include <linux/proc_fs.h>
28 #include <linux/seq_file.h>
29 #include <linux/console.h>
30 #include <linux/kmod.h>
31 #include <linux/err.h>
32 #include <linux/device.h>
33 #include <linux/efi.h>
40 * Frame buffer device initialization and setup routines
43 #define FBPIXMAPSIZE (1024 * 8)
45 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
46 int num_registered_fb __read_mostly
;
48 int lock_fb_info(struct fb_info
*info
)
50 mutex_lock(&info
->lock
);
52 mutex_unlock(&info
->lock
);
57 EXPORT_SYMBOL(lock_fb_info
);
63 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
64 struct fb_fix_screeninfo
*fix
)
68 if (fix
->visual
== FB_VISUAL_MONO01
||
69 fix
->visual
== FB_VISUAL_MONO10
)
72 if (var
->green
.length
== var
->blue
.length
&&
73 var
->green
.length
== var
->red
.length
&&
74 var
->green
.offset
== var
->blue
.offset
&&
75 var
->green
.offset
== var
->red
.offset
)
76 depth
= var
->green
.length
;
78 depth
= var
->green
.length
+ var
->red
.length
+
84 EXPORT_SYMBOL(fb_get_color_depth
);
87 * Data padding functions.
89 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
91 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
93 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
95 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
96 u32 shift_high
, u32 shift_low
, u32 mod
)
98 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
101 for (i
= height
; i
--; ) {
102 for (j
= 0; j
< idx
; j
++) {
105 tmp
|= *src
>> shift_low
;
107 tmp
= *src
<< shift_high
;
113 tmp
|= *src
>> shift_low
;
115 if (shift_high
< mod
) {
116 tmp
= *src
<< shift_high
;
123 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
126 * we need to lock this section since fb_cursor
127 * may use fb_imageblit()
129 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
131 u32 align
= buf
->buf_align
- 1, offset
;
132 char *addr
= buf
->addr
;
134 /* If IO mapped, we need to sync before access, no sharing of
137 if (buf
->flags
& FB_PIXMAP_IO
) {
138 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
139 info
->fbops
->fb_sync(info
);
143 /* See if we fit in the remaining pixmap space */
144 offset
= buf
->offset
+ align
;
146 if (offset
+ size
> buf
->size
) {
147 /* We do not fit. In order to be able to re-use the buffer,
148 * we must ensure no asynchronous DMA'ing or whatever operation
149 * is in progress, we sync for that.
151 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
152 info
->fbops
->fb_sync(info
);
155 buf
->offset
= offset
+ size
;
163 static inline unsigned safe_shift(unsigned d
, int n
)
165 return n
< 0 ? d
>> -n
: d
<< n
;
168 static void fb_set_logocmap(struct fb_info
*info
,
169 const struct linux_logo
*logo
)
171 struct fb_cmap palette_cmap
;
172 u16 palette_green
[16];
173 u16 palette_blue
[16];
176 const unsigned char *clut
= logo
->clut
;
178 palette_cmap
.start
= 0;
179 palette_cmap
.len
= 16;
180 palette_cmap
.red
= palette_red
;
181 palette_cmap
.green
= palette_green
;
182 palette_cmap
.blue
= palette_blue
;
183 palette_cmap
.transp
= NULL
;
185 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
186 n
= logo
->clutsize
- i
;
187 /* palette_cmap provides space for only 16 colors at once */
190 palette_cmap
.start
= 32 + i
;
191 palette_cmap
.len
= n
;
192 for (j
= 0; j
< n
; ++j
) {
193 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
194 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
195 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
198 fb_set_cmap(&palette_cmap
, info
);
202 static void fb_set_logo_truepalette(struct fb_info
*info
,
203 const struct linux_logo
*logo
,
206 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
207 unsigned char redmask
, greenmask
, bluemask
;
208 int redshift
, greenshift
, blueshift
;
210 const unsigned char *clut
= logo
->clut
;
213 * We have to create a temporary palette since console palette is only
216 /* Bug: Doesn't obey msb_right ... (who needs that?) */
217 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
218 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
219 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
220 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
221 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
222 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
224 for ( i
= 0; i
< logo
->clutsize
; i
++) {
225 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
226 safe_shift((clut
[1] & greenmask
), greenshift
) |
227 safe_shift((clut
[2] & bluemask
), blueshift
));
232 static void fb_set_logo_directpalette(struct fb_info
*info
,
233 const struct linux_logo
*logo
,
236 int redshift
, greenshift
, blueshift
;
239 redshift
= info
->var
.red
.offset
;
240 greenshift
= info
->var
.green
.offset
;
241 blueshift
= info
->var
.blue
.offset
;
243 for (i
= 32; i
< 32 + logo
->clutsize
; i
++)
244 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
247 static void fb_set_logo(struct fb_info
*info
,
248 const struct linux_logo
*logo
, u8
*dst
,
252 const u8
*src
= logo
->data
;
253 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
256 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
268 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
269 info
->fix
.visual
== FB_VISUAL_MONO10
)
270 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
274 for (i
= 0; i
< logo
->height
; i
++)
275 for (j
= 0; j
< logo
->width
; src
++) {
278 if (j
< logo
->width
) {
279 *dst
++ = *src
& 0x0f;
285 for (i
= 0; i
< logo
->height
; i
++) {
286 for (j
= 0; j
< logo
->width
; src
++) {
288 for (k
= 7; k
>= 0; k
--) {
289 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
299 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
300 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
301 * the visual format and color depth of the framebuffer, the DAC, the
302 * pseudo_palette, and the logo data will be adjusted accordingly.
304 * Case 1 - linux_logo_clut224:
305 * Color exceeds the number of console colors (16), thus we set the hardware DAC
306 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
308 * For visuals that require color info from the pseudo_palette, we also construct
309 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
312 * Case 2 - linux_logo_vga16:
313 * The number of colors just matches the console colors, thus there is no need
314 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
315 * each byte contains color information for two pixels (upper and lower nibble).
316 * To be consistent with fb_imageblit() usage, we therefore separate the two
317 * nibbles into separate bytes. The "depth" flag will be set to 4.
319 * Case 3 - linux_logo_mono:
320 * This is similar with Case 2. Each byte contains information for 8 pixels.
321 * We isolate each bit and expand each into a byte. The "depth" flag will
324 static struct logo_data
{
326 int needs_directpalette
;
327 int needs_truepalette
;
329 const struct linux_logo
*logo
;
330 } fb_logo __read_mostly
;
332 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
334 u32 size
= width
* height
, i
;
338 for (i
= size
; i
--; )
342 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
344 int i
, j
, h
= height
- 1;
346 for (i
= 0; i
< height
; i
++)
347 for (j
= 0; j
< width
; j
++)
348 out
[height
* j
+ h
- i
] = *in
++;
351 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
353 int i
, j
, w
= width
- 1;
355 for (i
= 0; i
< height
; i
++)
356 for (j
= 0; j
< width
; j
++)
357 out
[height
* (w
- j
) + i
] = *in
++;
360 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
361 struct fb_image
*image
, int rotate
)
365 if (rotate
== FB_ROTATE_UD
) {
366 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
368 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
369 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
370 } else if (rotate
== FB_ROTATE_CW
) {
371 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
374 image
->width
= image
->height
;
377 image
->dy
= image
->dx
;
378 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
379 } else if (rotate
== FB_ROTATE_CCW
) {
380 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
383 image
->width
= image
->height
;
386 image
->dx
= image
->dy
;
387 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
393 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
394 int rotate
, unsigned int num
)
398 if (rotate
== FB_ROTATE_UR
) {
400 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
402 info
->fbops
->fb_imageblit(info
, image
);
403 image
->dx
+= image
->width
+ 8;
405 } else if (rotate
== FB_ROTATE_UD
) {
406 for (x
= 0; x
< num
&& image
->dx
>= 0; x
++) {
407 info
->fbops
->fb_imageblit(info
, image
);
408 image
->dx
-= image
->width
+ 8;
410 } else if (rotate
== FB_ROTATE_CW
) {
412 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
414 info
->fbops
->fb_imageblit(info
, image
);
415 image
->dy
+= image
->height
+ 8;
417 } else if (rotate
== FB_ROTATE_CCW
) {
418 for (x
= 0; x
< num
&& image
->dy
>= 0; x
++) {
419 info
->fbops
->fb_imageblit(info
, image
);
420 image
->dy
-= image
->height
+ 8;
425 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
426 const struct linux_logo
*logo
, int y
,
429 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
430 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
431 struct fb_image image
;
433 /* Return if the frame buffer is not mapped or suspended */
434 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
435 info
->flags
& FBINFO_MODULE
)
439 image
.data
= logo
->data
;
441 if (fb_logo
.needs_cmapreset
)
442 fb_set_logocmap(info
, logo
);
444 if (fb_logo
.needs_truepalette
||
445 fb_logo
.needs_directpalette
) {
446 palette
= kmalloc(256 * 4, GFP_KERNEL
);
450 if (fb_logo
.needs_truepalette
)
451 fb_set_logo_truepalette(info
, logo
, palette
);
453 fb_set_logo_directpalette(info
, logo
, palette
);
455 saved_pseudo_palette
= info
->pseudo_palette
;
456 info
->pseudo_palette
= palette
;
459 if (fb_logo
.depth
<= 4) {
460 logo_new
= kmalloc(logo
->width
* logo
->height
, GFP_KERNEL
);
461 if (logo_new
== NULL
) {
463 if (saved_pseudo_palette
)
464 info
->pseudo_palette
= saved_pseudo_palette
;
467 image
.data
= logo_new
;
468 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
473 image
.width
= logo
->width
;
474 image
.height
= logo
->height
;
477 logo_rotate
= kmalloc(logo
->width
*
478 logo
->height
, GFP_KERNEL
);
480 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
483 fb_do_show_logo(info
, &image
, rotate
, n
);
486 if (saved_pseudo_palette
!= NULL
)
487 info
->pseudo_palette
= saved_pseudo_palette
;
494 #ifdef CONFIG_FB_LOGO_EXTRA
496 #define FB_LOGO_EX_NUM_MAX 10
497 static struct logo_data_extra
{
498 const struct linux_logo
*logo
;
500 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
501 static unsigned int fb_logo_ex_num
;
503 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
505 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
508 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
509 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
513 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
518 /* FIXME: logo_ex supports only truecolor fb. */
519 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
522 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
523 if (fb_logo_ex
[i
].logo
->type
!= fb_logo
.logo
->type
) {
524 fb_logo_ex
[i
].logo
= NULL
;
527 height
+= fb_logo_ex
[i
].logo
->height
;
529 height
-= fb_logo_ex
[i
].logo
->height
;
537 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
541 for (i
= 0; i
< fb_logo_ex_num
; i
++)
542 y
+= fb_show_logo_line(info
, rotate
,
543 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
548 #else /* !CONFIG_FB_LOGO_EXTRA */
550 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
557 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
562 #endif /* CONFIG_FB_LOGO_EXTRA */
565 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
567 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
570 memset(&fb_logo
, 0, sizeof(struct logo_data
));
572 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
573 info
->flags
& FBINFO_MODULE
)
576 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
577 depth
= info
->var
.blue
.length
;
578 if (info
->var
.red
.length
< depth
)
579 depth
= info
->var
.red
.length
;
580 if (info
->var
.green
.length
< depth
)
581 depth
= info
->var
.green
.length
;
584 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
585 /* assume console colormap */
589 /* Return if no suitable logo was found */
590 fb_logo
.logo
= fb_find_logo(depth
);
596 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
597 yres
= info
->var
.yres
;
599 yres
= info
->var
.xres
;
601 if (fb_logo
.logo
->height
> yres
) {
606 /* What depth we asked for might be different from what we get */
607 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
609 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
615 if (fb_logo
.depth
> 4 && depth
> 4) {
616 switch (info
->fix
.visual
) {
617 case FB_VISUAL_TRUECOLOR
:
618 fb_logo
.needs_truepalette
= 1;
620 case FB_VISUAL_DIRECTCOLOR
:
621 fb_logo
.needs_directpalette
= 1;
622 fb_logo
.needs_cmapreset
= 1;
624 case FB_VISUAL_PSEUDOCOLOR
:
625 fb_logo
.needs_cmapreset
= 1;
630 return fb_prepare_extra_logos(info
, fb_logo
.logo
->height
, yres
);
633 int fb_show_logo(struct fb_info
*info
, int rotate
)
637 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
639 y
= fb_show_extra_logos(info
, y
, rotate
);
644 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
645 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
646 #endif /* CONFIG_LOGO */
648 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
650 return (*pos
< FB_MAX
) ? pos
: NULL
;
653 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
656 return (*pos
< FB_MAX
) ? pos
: NULL
;
659 static void fb_seq_stop(struct seq_file
*m
, void *v
)
663 static int fb_seq_show(struct seq_file
*m
, void *v
)
665 int i
= *(loff_t
*)v
;
666 struct fb_info
*fi
= registered_fb
[i
];
669 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
673 static const struct seq_operations proc_fb_seq_ops
= {
674 .start
= fb_seq_start
,
680 static int proc_fb_open(struct inode
*inode
, struct file
*file
)
682 return seq_open(file
, &proc_fb_seq_ops
);
685 static const struct file_operations fb_proc_fops
= {
686 .owner
= THIS_MODULE
,
687 .open
= proc_fb_open
,
690 .release
= seq_release
,
694 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
696 unsigned long p
= *ppos
;
697 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
698 int fbidx
= iminor(inode
);
699 struct fb_info
*info
= registered_fb
[fbidx
];
702 int c
, i
, cnt
= 0, err
= 0;
703 unsigned long total_size
;
705 if (!info
|| ! info
->screen_base
)
708 if (info
->state
!= FBINFO_STATE_RUNNING
)
711 if (info
->fbops
->fb_read
)
712 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
714 total_size
= info
->screen_size
;
717 total_size
= info
->fix
.smem_len
;
722 if (count
>= total_size
)
725 if (count
+ p
> total_size
)
726 count
= total_size
- p
;
728 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
733 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
735 if (info
->fbops
->fb_sync
)
736 info
->fbops
->fb_sync(info
);
739 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
741 for (i
= c
>> 2; i
--; )
742 *dst
++ = fb_readl(src
++);
744 u8
*dst8
= (u8
*) dst
;
745 u8 __iomem
*src8
= (u8 __iomem
*) src
;
747 for (i
= c
& 3; i
--;)
748 *dst8
++ = fb_readb(src8
++);
750 src
= (u32 __iomem
*) src8
;
753 if (copy_to_user(buf
, buffer
, c
)) {
765 return (err
) ? err
: cnt
;
769 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
771 unsigned long p
= *ppos
;
772 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
773 int fbidx
= iminor(inode
);
774 struct fb_info
*info
= registered_fb
[fbidx
];
777 int c
, i
, cnt
= 0, err
= 0;
778 unsigned long total_size
;
780 if (!info
|| !info
->screen_base
)
783 if (info
->state
!= FBINFO_STATE_RUNNING
)
786 if (info
->fbops
->fb_write
)
787 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
789 total_size
= info
->screen_size
;
792 total_size
= info
->fix
.smem_len
;
797 if (count
> total_size
) {
802 if (count
+ p
> total_size
) {
806 count
= total_size
- p
;
809 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
814 dst
= (u32 __iomem
*) (info
->screen_base
+ p
);
816 if (info
->fbops
->fb_sync
)
817 info
->fbops
->fb_sync(info
);
820 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
823 if (copy_from_user(src
, buf
, c
)) {
828 for (i
= c
>> 2; i
--; )
829 fb_writel(*src
++, dst
++);
832 u8
*src8
= (u8
*) src
;
833 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
835 for (i
= c
& 3; i
--; )
836 fb_writeb(*src8
++, dst8
++);
838 dst
= (u32 __iomem
*) dst8
;
849 return (cnt
) ? cnt
: err
;
853 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
855 struct fb_fix_screeninfo
*fix
= &info
->fix
;
856 unsigned int yres
= info
->var
.yres
;
859 if (var
->yoffset
> 0) {
860 if (var
->vmode
& FB_VMODE_YWRAP
) {
861 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
865 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
869 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
870 (var
->xoffset
% fix
->xpanstep
)))
873 if (err
|| !info
->fbops
->fb_pan_display
||
874 var
->yoffset
> info
->var
.yres_virtual
- yres
||
875 var
->xoffset
> info
->var
.xres_virtual
- info
->var
.xres
)
878 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
880 info
->var
.xoffset
= var
->xoffset
;
881 info
->var
.yoffset
= var
->yoffset
;
882 if (var
->vmode
& FB_VMODE_YWRAP
)
883 info
->var
.vmode
|= FB_VMODE_YWRAP
;
885 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
889 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
892 struct fb_event event
;
893 struct fb_blit_caps caps
, fbcaps
;
896 memset(&caps
, 0, sizeof(caps
));
897 memset(&fbcaps
, 0, sizeof(fbcaps
));
898 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
901 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
902 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
904 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
905 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
906 (fbcaps
.len
< caps
.len
))
913 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
915 int flags
= info
->flags
;
918 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
919 struct fb_videomode mode1
, mode2
;
921 fb_var_to_videomode(&mode1
, var
);
922 fb_var_to_videomode(&mode2
, &info
->var
);
923 /* make sure we don't delete the videomode of current var */
924 ret
= fb_mode_is_equal(&mode1
, &mode2
);
927 struct fb_event event
;
931 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
935 fb_delete_videomode(&mode1
, &info
->modelist
);
938 ret
= (ret
) ? -EINVAL
: 0;
942 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
943 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
944 u32 activate
= var
->activate
;
946 if (!info
->fbops
->fb_check_var
) {
951 ret
= info
->fbops
->fb_check_var(var
, info
);
956 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
957 struct fb_var_screeninfo old_var
;
958 struct fb_videomode mode
;
960 if (info
->fbops
->fb_get_caps
) {
961 ret
= fb_check_caps(info
, var
, activate
);
970 if (info
->fbops
->fb_set_par
) {
971 ret
= info
->fbops
->fb_set_par(info
);
975 printk(KERN_WARNING
"detected "
977 "error code: %d\n", ret
);
982 fb_pan_display(info
, &info
->var
);
983 fb_set_cmap(&info
->cmap
, info
);
984 fb_var_to_videomode(&mode
, &info
->var
);
986 if (info
->modelist
.prev
&& info
->modelist
.next
&&
987 !list_empty(&info
->modelist
))
988 ret
= fb_add_videomode(&mode
, &info
->modelist
);
990 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
991 struct fb_event event
;
992 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
993 FB_EVENT_MODE_CHANGE_ALL
:
994 FB_EVENT_MODE_CHANGE
;
996 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
999 fb_notifier_call_chain(evnt
, &event
);
1009 fb_blank(struct fb_info
*info
, int blank
)
1013 if (blank
> FB_BLANK_POWERDOWN
)
1014 blank
= FB_BLANK_POWERDOWN
;
1016 if (info
->fbops
->fb_blank
)
1017 ret
= info
->fbops
->fb_blank(blank
, info
);
1020 struct fb_event event
;
1023 event
.data
= &blank
;
1024 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1030 static long do_fb_ioctl(struct fb_info
*info
, unsigned int cmd
,
1034 struct fb_var_screeninfo var
;
1035 struct fb_fix_screeninfo fix
;
1036 struct fb_con2fbmap con2fb
;
1037 struct fb_cmap cmap_from
;
1038 struct fb_cmap_user cmap
;
1039 struct fb_event event
;
1040 void __user
*argp
= (void __user
*)arg
;
1044 case FBIOGET_VSCREENINFO
:
1045 if (!lock_fb_info(info
))
1048 unlock_fb_info(info
);
1050 ret
= copy_to_user(argp
, &var
, sizeof(var
)) ? -EFAULT
: 0;
1052 case FBIOPUT_VSCREENINFO
:
1053 if (copy_from_user(&var
, argp
, sizeof(var
)))
1055 if (!lock_fb_info(info
))
1057 acquire_console_sem();
1058 info
->flags
|= FBINFO_MISC_USEREVENT
;
1059 ret
= fb_set_var(info
, &var
);
1060 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1061 release_console_sem();
1062 unlock_fb_info(info
);
1063 if (!ret
&& copy_to_user(argp
, &var
, sizeof(var
)))
1066 case FBIOGET_FSCREENINFO
:
1067 if (!lock_fb_info(info
))
1070 unlock_fb_info(info
);
1072 ret
= copy_to_user(argp
, &fix
, sizeof(fix
)) ? -EFAULT
: 0;
1075 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1077 ret
= fb_set_user_cmap(&cmap
, info
);
1080 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1082 if (!lock_fb_info(info
))
1084 cmap_from
= info
->cmap
;
1085 unlock_fb_info(info
);
1086 ret
= fb_cmap_to_user(&cmap_from
, &cmap
);
1088 case FBIOPAN_DISPLAY
:
1089 if (copy_from_user(&var
, argp
, sizeof(var
)))
1091 if (!lock_fb_info(info
))
1093 acquire_console_sem();
1094 ret
= fb_pan_display(info
, &var
);
1095 release_console_sem();
1096 unlock_fb_info(info
);
1097 if (ret
== 0 && copy_to_user(argp
, &var
, sizeof(var
)))
1103 case FBIOGET_CON2FBMAP
:
1104 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1106 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1108 con2fb
.framebuffer
= -1;
1109 event
.data
= &con2fb
;
1110 if (!lock_fb_info(info
))
1113 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
1114 unlock_fb_info(info
);
1115 ret
= copy_to_user(argp
, &con2fb
, sizeof(con2fb
)) ? -EFAULT
: 0;
1117 case FBIOPUT_CON2FBMAP
:
1118 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1120 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1122 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
1124 if (!registered_fb
[con2fb
.framebuffer
])
1125 request_module("fb%d", con2fb
.framebuffer
);
1126 if (!registered_fb
[con2fb
.framebuffer
]) {
1130 event
.data
= &con2fb
;
1131 if (!lock_fb_info(info
))
1134 ret
= fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
, &event
);
1135 unlock_fb_info(info
);
1138 if (!lock_fb_info(info
))
1140 acquire_console_sem();
1141 info
->flags
|= FBINFO_MISC_USEREVENT
;
1142 ret
= fb_blank(info
, arg
);
1143 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1144 release_console_sem();
1145 unlock_fb_info(info
);
1148 if (!lock_fb_info(info
))
1152 ret
= fb
->fb_ioctl(info
, cmd
, arg
);
1155 unlock_fb_info(info
);
1160 static long fb_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1162 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1163 int fbidx
= iminor(inode
);
1164 struct fb_info
*info
= registered_fb
[fbidx
];
1166 return do_fb_ioctl(info
, cmd
, arg
);
1169 #ifdef CONFIG_COMPAT
1170 struct fb_fix_screeninfo32
{
1172 compat_caddr_t smem_start
;
1181 compat_caddr_t mmio_start
;
1191 compat_caddr_t green
;
1192 compat_caddr_t blue
;
1193 compat_caddr_t transp
;
1196 static int fb_getput_cmap(struct fb_info
*info
, unsigned int cmd
,
1199 struct fb_cmap_user __user
*cmap
;
1200 struct fb_cmap32 __user
*cmap32
;
1204 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1205 cmap32
= compat_ptr(arg
);
1207 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1210 if (get_user(data
, &cmap32
->red
) ||
1211 put_user(compat_ptr(data
), &cmap
->red
) ||
1212 get_user(data
, &cmap32
->green
) ||
1213 put_user(compat_ptr(data
), &cmap
->green
) ||
1214 get_user(data
, &cmap32
->blue
) ||
1215 put_user(compat_ptr(data
), &cmap
->blue
) ||
1216 get_user(data
, &cmap32
->transp
) ||
1217 put_user(compat_ptr(data
), &cmap
->transp
))
1220 err
= do_fb_ioctl(info
, cmd
, (unsigned long) cmap
);
1223 if (copy_in_user(&cmap32
->start
,
1231 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1232 struct fb_fix_screeninfo32 __user
*fix32
)
1237 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1239 data
= (__u32
) (unsigned long) fix
->smem_start
;
1240 err
|= put_user(data
, &fix32
->smem_start
);
1242 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1243 err
|= put_user(fix
->type
, &fix32
->type
);
1244 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1245 err
|= put_user(fix
->visual
, &fix32
->visual
);
1246 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1247 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1248 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1249 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1251 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1252 err
|= put_user(data
, &fix32
->mmio_start
);
1254 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1255 err
|= put_user(fix
->accel
, &fix32
->accel
);
1256 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1257 sizeof(fix
->reserved
));
1262 static int fb_get_fscreeninfo(struct fb_info
*info
, unsigned int cmd
,
1265 mm_segment_t old_fs
;
1266 struct fb_fix_screeninfo fix
;
1267 struct fb_fix_screeninfo32 __user
*fix32
;
1270 fix32
= compat_ptr(arg
);
1274 err
= do_fb_ioctl(info
, cmd
, (unsigned long) &fix
);
1278 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1283 static long fb_compat_ioctl(struct file
*file
, unsigned int cmd
,
1286 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
1287 int fbidx
= iminor(inode
);
1288 struct fb_info
*info
= registered_fb
[fbidx
];
1289 struct fb_ops
*fb
= info
->fbops
;
1290 long ret
= -ENOIOCTLCMD
;
1293 case FBIOGET_VSCREENINFO
:
1294 case FBIOPUT_VSCREENINFO
:
1295 case FBIOPAN_DISPLAY
:
1296 case FBIOGET_CON2FBMAP
:
1297 case FBIOPUT_CON2FBMAP
:
1298 arg
= (unsigned long) compat_ptr(arg
);
1300 ret
= do_fb_ioctl(info
, cmd
, arg
);
1303 case FBIOGET_FSCREENINFO
:
1304 ret
= fb_get_fscreeninfo(info
, cmd
, arg
);
1309 ret
= fb_getput_cmap(info
, cmd
, arg
);
1313 if (fb
->fb_compat_ioctl
)
1314 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1322 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1324 int fbidx
= iminor(file
->f_path
.dentry
->d_inode
);
1325 struct fb_info
*info
= registered_fb
[fbidx
];
1326 struct fb_ops
*fb
= info
->fbops
;
1328 unsigned long start
;
1331 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
1333 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
1336 mutex_lock(&info
->mm_lock
);
1339 res
= fb
->fb_mmap(info
, vma
);
1340 mutex_unlock(&info
->mm_lock
);
1344 /* frame buffer memory */
1345 start
= info
->fix
.smem_start
;
1346 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
1348 /* memory mapped io */
1350 if (info
->var
.accel_flags
) {
1351 mutex_unlock(&info
->mm_lock
);
1354 start
= info
->fix
.mmio_start
;
1355 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
1357 mutex_unlock(&info
->mm_lock
);
1359 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
1362 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
1363 /* This is an IO map - tell maydump to skip this VMA */
1364 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
1365 fb_pgprotect(file
, vma
, off
);
1366 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
1367 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
1373 fb_open(struct inode
*inode
, struct file
*file
)
1374 __acquires(&info
->lock
)
1375 __releases(&info
->lock
)
1377 int fbidx
= iminor(inode
);
1378 struct fb_info
*info
;
1381 if (fbidx
>= FB_MAX
)
1383 info
= registered_fb
[fbidx
];
1385 request_module("fb%d", fbidx
);
1386 info
= registered_fb
[fbidx
];
1389 mutex_lock(&info
->lock
);
1390 if (!try_module_get(info
->fbops
->owner
)) {
1394 file
->private_data
= info
;
1395 if (info
->fbops
->fb_open
) {
1396 res
= info
->fbops
->fb_open(info
,1);
1398 module_put(info
->fbops
->owner
);
1400 #ifdef CONFIG_FB_DEFERRED_IO
1402 fb_deferred_io_open(info
, inode
, file
);
1405 mutex_unlock(&info
->lock
);
1410 fb_release(struct inode
*inode
, struct file
*file
)
1411 __acquires(&info
->lock
)
1412 __releases(&info
->lock
)
1414 struct fb_info
* const info
= file
->private_data
;
1416 mutex_lock(&info
->lock
);
1417 if (info
->fbops
->fb_release
)
1418 info
->fbops
->fb_release(info
,1);
1419 module_put(info
->fbops
->owner
);
1420 mutex_unlock(&info
->lock
);
1424 static const struct file_operations fb_fops
= {
1425 .owner
= THIS_MODULE
,
1428 .unlocked_ioctl
= fb_ioctl
,
1429 #ifdef CONFIG_COMPAT
1430 .compat_ioctl
= fb_compat_ioctl
,
1434 .release
= fb_release
,
1435 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1436 .get_unmapped_area
= get_fb_unmapped_area
,
1438 #ifdef CONFIG_FB_DEFERRED_IO
1439 .fsync
= fb_deferred_io_fsync
,
1443 struct class *fb_class
;
1444 EXPORT_SYMBOL(fb_class
);
1446 static int fb_check_foreignness(struct fb_info
*fi
)
1448 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1450 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1453 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1455 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1456 #endif /* __BIG_ENDIAN */
1458 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1459 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1460 "support this framebuffer\n", fi
->fix
.id
);
1462 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1463 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1464 "support this framebuffer\n", fi
->fix
.id
);
1471 static bool fb_do_apertures_overlap(struct fb_info
*gen
, struct fb_info
*hw
)
1473 /* is the generic aperture base the same as the HW one */
1474 if (gen
->aperture_base
== hw
->aperture_base
)
1476 /* is the generic aperture base inside the hw base->hw base+size */
1477 if (gen
->aperture_base
> hw
->aperture_base
&& gen
->aperture_base
<= hw
->aperture_base
+ hw
->aperture_size
)
1482 * register_framebuffer - registers a frame buffer device
1483 * @fb_info: frame buffer info structure
1485 * Registers a frame buffer device @fb_info.
1487 * Returns negative errno on error, or zero for success.
1492 register_framebuffer(struct fb_info
*fb_info
)
1495 struct fb_event event
;
1496 struct fb_videomode mode
;
1498 if (num_registered_fb
== FB_MAX
)
1501 if (fb_check_foreignness(fb_info
))
1504 /* check all firmware fbs and kick off if the base addr overlaps */
1505 for (i
= 0 ; i
< FB_MAX
; i
++) {
1506 if (!registered_fb
[i
])
1509 if (registered_fb
[i
]->flags
& FBINFO_MISC_FIRMWARE
) {
1510 if (fb_do_apertures_overlap(registered_fb
[i
], fb_info
)) {
1511 printk(KERN_ERR
"fb: conflicting fb hw usage "
1512 "%s vs %s - removing generic driver\n",
1514 registered_fb
[i
]->fix
.id
);
1515 unregister_framebuffer(registered_fb
[i
]);
1520 num_registered_fb
++;
1521 for (i
= 0 ; i
< FB_MAX
; i
++)
1522 if (!registered_fb
[i
])
1525 mutex_init(&fb_info
->lock
);
1526 mutex_init(&fb_info
->mm_lock
);
1528 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1529 MKDEV(FB_MAJOR
, i
), NULL
, "fb%d", i
);
1530 if (IS_ERR(fb_info
->dev
)) {
1532 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1533 fb_info
->dev
= NULL
;
1535 fb_init_device(fb_info
);
1537 if (fb_info
->pixmap
.addr
== NULL
) {
1538 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1539 if (fb_info
->pixmap
.addr
) {
1540 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1541 fb_info
->pixmap
.buf_align
= 1;
1542 fb_info
->pixmap
.scan_align
= 1;
1543 fb_info
->pixmap
.access_align
= 32;
1544 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1547 fb_info
->pixmap
.offset
= 0;
1549 if (!fb_info
->pixmap
.blit_x
)
1550 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1552 if (!fb_info
->pixmap
.blit_y
)
1553 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1555 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1556 INIT_LIST_HEAD(&fb_info
->modelist
);
1558 fb_var_to_videomode(&mode
, &fb_info
->var
);
1559 fb_add_videomode(&mode
, &fb_info
->modelist
);
1560 registered_fb
[i
] = fb_info
;
1562 event
.info
= fb_info
;
1563 if (!lock_fb_info(fb_info
))
1565 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1566 unlock_fb_info(fb_info
);
1572 * unregister_framebuffer - releases a frame buffer device
1573 * @fb_info: frame buffer info structure
1575 * Unregisters a frame buffer device @fb_info.
1577 * Returns negative errno on error, or zero for success.
1579 * This function will also notify the framebuffer console
1580 * to release the driver.
1582 * This is meant to be called within a driver's module_exit()
1583 * function. If this is called outside module_exit(), ensure
1584 * that the driver implements fb_open() and fb_release() to
1585 * check that no processes are using the device.
1589 unregister_framebuffer(struct fb_info
*fb_info
)
1591 struct fb_event event
;
1595 if (!registered_fb
[i
]) {
1601 if (!lock_fb_info(fb_info
))
1603 event
.info
= fb_info
;
1604 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1605 unlock_fb_info(fb_info
);
1612 if (fb_info
->pixmap
.addr
&&
1613 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1614 kfree(fb_info
->pixmap
.addr
);
1615 fb_destroy_modelist(&fb_info
->modelist
);
1616 registered_fb
[i
]=NULL
;
1617 num_registered_fb
--;
1618 fb_cleanup_device(fb_info
);
1619 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1620 event
.info
= fb_info
;
1621 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1623 /* this may free fb info */
1624 if (fb_info
->fbops
->fb_destroy
)
1625 fb_info
->fbops
->fb_destroy(fb_info
);
1631 * fb_set_suspend - low level driver signals suspend
1632 * @info: framebuffer affected
1633 * @state: 0 = resuming, !=0 = suspending
1635 * This is meant to be used by low level drivers to
1636 * signal suspend/resume to the core & clients.
1637 * It must be called with the console semaphore held
1639 void fb_set_suspend(struct fb_info
*info
, int state
)
1641 struct fb_event event
;
1643 if (!lock_fb_info(info
))
1647 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1648 info
->state
= FBINFO_STATE_SUSPENDED
;
1650 info
->state
= FBINFO_STATE_RUNNING
;
1651 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1653 unlock_fb_info(info
);
1657 * fbmem_init - init frame buffer subsystem
1659 * Initialize the frame buffer subsystem.
1661 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1668 proc_create("fb", 0, NULL
, &fb_proc_fops
);
1670 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1671 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1673 fb_class
= class_create(THIS_MODULE
, "graphics");
1674 if (IS_ERR(fb_class
)) {
1675 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1682 module_init(fbmem_init
);
1686 remove_proc_entry("fb", NULL
);
1687 class_destroy(fb_class
);
1688 unregister_chrdev(FB_MAJOR
, "fb");
1691 module_exit(fbmem_exit
);
1692 MODULE_LICENSE("GPL");
1693 MODULE_DESCRIPTION("Framebuffer base");
1695 subsys_initcall(fbmem_init
);
1698 int fb_new_modelist(struct fb_info
*info
)
1700 struct fb_event event
;
1701 struct fb_var_screeninfo var
= info
->var
;
1702 struct list_head
*pos
, *n
;
1703 struct fb_modelist
*modelist
;
1704 struct fb_videomode
*m
, mode
;
1707 list_for_each_safe(pos
, n
, &info
->modelist
) {
1708 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1709 m
= &modelist
->mode
;
1710 fb_videomode_to_var(&var
, m
);
1711 var
.activate
= FB_ACTIVATE_TEST
;
1712 err
= fb_set_var(info
, &var
);
1713 fb_var_to_videomode(&mode
, &var
);
1714 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1722 if (!list_empty(&info
->modelist
)) {
1723 if (!lock_fb_info(info
))
1726 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1727 unlock_fb_info(info
);
1733 static char *video_options
[FB_MAX
] __read_mostly
;
1734 static int ofonly __read_mostly
;
1737 * fb_get_options - get kernel boot parameters
1738 * @name: framebuffer name as it would appear in
1739 * the boot parameter line
1740 * (video=<name>:<options>)
1741 * @option: the option will be stored here
1743 * NOTE: Needed to maintain backwards compatibility
1745 int fb_get_options(char *name
, char **option
)
1747 char *opt
, *options
= NULL
;
1748 int opt_len
, retval
= 0;
1749 int name_len
= strlen(name
), i
;
1751 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1754 if (name_len
&& !retval
) {
1755 for (i
= 0; i
< FB_MAX
; i
++) {
1756 if (video_options
[i
] == NULL
)
1758 opt_len
= strlen(video_options
[i
]);
1761 opt
= video_options
[i
];
1762 if (!strncmp(name
, opt
, name_len
) &&
1763 opt
[name_len
] == ':')
1764 options
= opt
+ name_len
+ 1;
1767 if (options
&& !strncmp(options
, "off", 3))
1778 * video_setup - process command line options
1779 * @options: string of options
1781 * Process command line options for frame buffer subsystem.
1783 * NOTE: This function is a __setup and __init function.
1784 * It only stores the options. Drivers have to call
1785 * fb_get_options() as necessary.
1790 static int __init
video_setup(char *options
)
1794 if (!options
|| !*options
)
1797 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1802 if (!global
&& !strchr(options
, ':')) {
1803 fb_mode_option
= options
;
1808 for (i
= 0; i
< FB_MAX
; i
++) {
1809 if (video_options
[i
] == NULL
) {
1810 video_options
[i
] = options
;
1819 __setup("video=", video_setup
);
1823 * Visible symbols for modules
1826 EXPORT_SYMBOL(register_framebuffer
);
1827 EXPORT_SYMBOL(unregister_framebuffer
);
1828 EXPORT_SYMBOL(num_registered_fb
);
1829 EXPORT_SYMBOL(registered_fb
);
1830 EXPORT_SYMBOL(fb_show_logo
);
1831 EXPORT_SYMBOL(fb_set_var
);
1832 EXPORT_SYMBOL(fb_blank
);
1833 EXPORT_SYMBOL(fb_pan_display
);
1834 EXPORT_SYMBOL(fb_get_buffer_offset
);
1835 EXPORT_SYMBOL(fb_set_suspend
);
1836 EXPORT_SYMBOL(fb_get_options
);
1838 MODULE_LICENSE("GPL");