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 static DEFINE_MUTEX(registration_lock
);
47 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
48 EXPORT_SYMBOL(registered_fb
);
50 int num_registered_fb __read_mostly
;
51 EXPORT_SYMBOL(num_registered_fb
);
53 static struct fb_info
*get_fb_info(unsigned int idx
)
55 struct fb_info
*fb_info
;
58 return ERR_PTR(-ENODEV
);
60 mutex_lock(®istration_lock
);
61 fb_info
= registered_fb
[idx
];
63 atomic_inc(&fb_info
->count
);
64 mutex_unlock(®istration_lock
);
69 static void put_fb_info(struct fb_info
*fb_info
)
71 if (!atomic_dec_and_test(&fb_info
->count
))
73 if (fb_info
->fbops
->fb_destroy
)
74 fb_info
->fbops
->fb_destroy(fb_info
);
77 int lock_fb_info(struct fb_info
*info
)
79 mutex_lock(&info
->lock
);
81 mutex_unlock(&info
->lock
);
86 EXPORT_SYMBOL(lock_fb_info
);
92 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
93 struct fb_fix_screeninfo
*fix
)
97 if (fix
->visual
== FB_VISUAL_MONO01
||
98 fix
->visual
== FB_VISUAL_MONO10
)
101 if (var
->green
.length
== var
->blue
.length
&&
102 var
->green
.length
== var
->red
.length
&&
103 var
->green
.offset
== var
->blue
.offset
&&
104 var
->green
.offset
== var
->red
.offset
)
105 depth
= var
->green
.length
;
107 depth
= var
->green
.length
+ var
->red
.length
+
113 EXPORT_SYMBOL(fb_get_color_depth
);
116 * Data padding functions.
118 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
120 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
122 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
124 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
125 u32 shift_high
, u32 shift_low
, u32 mod
)
127 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
130 for (i
= height
; i
--; ) {
131 for (j
= 0; j
< idx
; j
++) {
134 tmp
|= *src
>> shift_low
;
136 tmp
= *src
<< shift_high
;
142 tmp
|= *src
>> shift_low
;
144 if (shift_high
< mod
) {
145 tmp
= *src
<< shift_high
;
152 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
155 * we need to lock this section since fb_cursor
156 * may use fb_imageblit()
158 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
160 u32 align
= buf
->buf_align
- 1, offset
;
161 char *addr
= buf
->addr
;
163 /* If IO mapped, we need to sync before access, no sharing of
166 if (buf
->flags
& FB_PIXMAP_IO
) {
167 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
168 info
->fbops
->fb_sync(info
);
172 /* See if we fit in the remaining pixmap space */
173 offset
= buf
->offset
+ align
;
175 if (offset
+ size
> buf
->size
) {
176 /* We do not fit. In order to be able to re-use the buffer,
177 * we must ensure no asynchronous DMA'ing or whatever operation
178 * is in progress, we sync for that.
180 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
181 info
->fbops
->fb_sync(info
);
184 buf
->offset
= offset
+ size
;
189 EXPORT_SYMBOL(fb_get_buffer_offset
);
193 static inline unsigned safe_shift(unsigned d
, int n
)
195 return n
< 0 ? d
>> -n
: d
<< n
;
198 static void fb_set_logocmap(struct fb_info
*info
,
199 const struct linux_logo
*logo
)
201 struct fb_cmap palette_cmap
;
202 u16 palette_green
[16];
203 u16 palette_blue
[16];
206 const unsigned char *clut
= logo
->clut
;
208 palette_cmap
.start
= 0;
209 palette_cmap
.len
= 16;
210 palette_cmap
.red
= palette_red
;
211 palette_cmap
.green
= palette_green
;
212 palette_cmap
.blue
= palette_blue
;
213 palette_cmap
.transp
= NULL
;
215 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
216 n
= logo
->clutsize
- i
;
217 /* palette_cmap provides space for only 16 colors at once */
220 palette_cmap
.start
= 32 + i
;
221 palette_cmap
.len
= n
;
222 for (j
= 0; j
< n
; ++j
) {
223 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
224 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
225 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
228 fb_set_cmap(&palette_cmap
, info
);
232 static void fb_set_logo_truepalette(struct fb_info
*info
,
233 const struct linux_logo
*logo
,
236 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
237 unsigned char redmask
, greenmask
, bluemask
;
238 int redshift
, greenshift
, blueshift
;
240 const unsigned char *clut
= logo
->clut
;
243 * We have to create a temporary palette since console palette is only
246 /* Bug: Doesn't obey msb_right ... (who needs that?) */
247 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
248 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
249 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
250 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
251 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
252 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
254 for ( i
= 0; i
< logo
->clutsize
; i
++) {
255 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
256 safe_shift((clut
[1] & greenmask
), greenshift
) |
257 safe_shift((clut
[2] & bluemask
), blueshift
));
262 static void fb_set_logo_directpalette(struct fb_info
*info
,
263 const struct linux_logo
*logo
,
266 int redshift
, greenshift
, blueshift
;
269 redshift
= info
->var
.red
.offset
;
270 greenshift
= info
->var
.green
.offset
;
271 blueshift
= info
->var
.blue
.offset
;
273 for (i
= 32; i
< 32 + logo
->clutsize
; i
++)
274 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
277 static void fb_set_logo(struct fb_info
*info
,
278 const struct linux_logo
*logo
, u8
*dst
,
282 const u8
*src
= logo
->data
;
283 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
286 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
298 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
299 info
->fix
.visual
== FB_VISUAL_MONO10
)
300 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
304 for (i
= 0; i
< logo
->height
; i
++)
305 for (j
= 0; j
< logo
->width
; src
++) {
308 if (j
< logo
->width
) {
309 *dst
++ = *src
& 0x0f;
315 for (i
= 0; i
< logo
->height
; i
++) {
316 for (j
= 0; j
< logo
->width
; src
++) {
318 for (k
= 7; k
>= 0; k
--) {
319 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
329 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
330 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
331 * the visual format and color depth of the framebuffer, the DAC, the
332 * pseudo_palette, and the logo data will be adjusted accordingly.
334 * Case 1 - linux_logo_clut224:
335 * Color exceeds the number of console colors (16), thus we set the hardware DAC
336 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
338 * For visuals that require color info from the pseudo_palette, we also construct
339 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
342 * Case 2 - linux_logo_vga16:
343 * The number of colors just matches the console colors, thus there is no need
344 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
345 * each byte contains color information for two pixels (upper and lower nibble).
346 * To be consistent with fb_imageblit() usage, we therefore separate the two
347 * nibbles into separate bytes. The "depth" flag will be set to 4.
349 * Case 3 - linux_logo_mono:
350 * This is similar with Case 2. Each byte contains information for 8 pixels.
351 * We isolate each bit and expand each into a byte. The "depth" flag will
354 static struct logo_data
{
356 int needs_directpalette
;
357 int needs_truepalette
;
359 const struct linux_logo
*logo
;
360 } fb_logo __read_mostly
;
362 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
364 u32 size
= width
* height
, i
;
368 for (i
= size
; i
--; )
372 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
374 int i
, j
, h
= height
- 1;
376 for (i
= 0; i
< height
; i
++)
377 for (j
= 0; j
< width
; j
++)
378 out
[height
* j
+ h
- i
] = *in
++;
381 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
383 int i
, j
, w
= width
- 1;
385 for (i
= 0; i
< height
; i
++)
386 for (j
= 0; j
< width
; j
++)
387 out
[height
* (w
- j
) + i
] = *in
++;
390 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
391 struct fb_image
*image
, int rotate
)
395 if (rotate
== FB_ROTATE_UD
) {
396 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
398 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
399 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
400 } else if (rotate
== FB_ROTATE_CW
) {
401 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
404 image
->width
= image
->height
;
407 image
->dy
= image
->dx
;
408 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
409 } else if (rotate
== FB_ROTATE_CCW
) {
410 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
413 image
->width
= image
->height
;
416 image
->dx
= image
->dy
;
417 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
423 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
424 int rotate
, unsigned int num
)
428 if (rotate
== FB_ROTATE_UR
) {
430 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
432 info
->fbops
->fb_imageblit(info
, image
);
433 image
->dx
+= image
->width
+ 8;
435 } else if (rotate
== FB_ROTATE_UD
) {
436 for (x
= 0; x
< num
&& image
->dx
>= 0; x
++) {
437 info
->fbops
->fb_imageblit(info
, image
);
438 image
->dx
-= image
->width
+ 8;
440 } else if (rotate
== FB_ROTATE_CW
) {
442 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
444 info
->fbops
->fb_imageblit(info
, image
);
445 image
->dy
+= image
->height
+ 8;
447 } else if (rotate
== FB_ROTATE_CCW
) {
448 for (x
= 0; x
< num
&& image
->dy
>= 0; x
++) {
449 info
->fbops
->fb_imageblit(info
, image
);
450 image
->dy
-= image
->height
+ 8;
455 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
456 const struct linux_logo
*logo
, int y
,
459 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
460 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
461 struct fb_image image
;
463 /* Return if the frame buffer is not mapped or suspended */
464 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
465 info
->flags
& FBINFO_MODULE
)
469 image
.data
= logo
->data
;
471 if (fb_logo
.needs_cmapreset
)
472 fb_set_logocmap(info
, logo
);
474 if (fb_logo
.needs_truepalette
||
475 fb_logo
.needs_directpalette
) {
476 palette
= kmalloc(256 * 4, GFP_KERNEL
);
480 if (fb_logo
.needs_truepalette
)
481 fb_set_logo_truepalette(info
, logo
, palette
);
483 fb_set_logo_directpalette(info
, logo
, palette
);
485 saved_pseudo_palette
= info
->pseudo_palette
;
486 info
->pseudo_palette
= palette
;
489 if (fb_logo
.depth
<= 4) {
490 logo_new
= kmalloc(logo
->width
* logo
->height
, GFP_KERNEL
);
491 if (logo_new
== NULL
) {
493 if (saved_pseudo_palette
)
494 info
->pseudo_palette
= saved_pseudo_palette
;
497 image
.data
= logo_new
;
498 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
503 image
.width
= logo
->width
;
504 image
.height
= logo
->height
;
507 logo_rotate
= kmalloc(logo
->width
*
508 logo
->height
, GFP_KERNEL
);
510 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
513 fb_do_show_logo(info
, &image
, rotate
, n
);
516 if (saved_pseudo_palette
!= NULL
)
517 info
->pseudo_palette
= saved_pseudo_palette
;
524 #ifdef CONFIG_FB_LOGO_EXTRA
526 #define FB_LOGO_EX_NUM_MAX 10
527 static struct logo_data_extra
{
528 const struct linux_logo
*logo
;
530 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
531 static unsigned int fb_logo_ex_num
;
533 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
535 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
538 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
539 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
543 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
548 /* FIXME: logo_ex supports only truecolor fb. */
549 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
552 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
553 if (fb_logo_ex
[i
].logo
->type
!= fb_logo
.logo
->type
) {
554 fb_logo_ex
[i
].logo
= NULL
;
557 height
+= fb_logo_ex
[i
].logo
->height
;
559 height
-= fb_logo_ex
[i
].logo
->height
;
567 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
571 for (i
= 0; i
< fb_logo_ex_num
; i
++)
572 y
+= fb_show_logo_line(info
, rotate
,
573 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
578 #else /* !CONFIG_FB_LOGO_EXTRA */
580 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
587 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
592 #endif /* CONFIG_FB_LOGO_EXTRA */
595 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
597 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
600 memset(&fb_logo
, 0, sizeof(struct logo_data
));
602 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
603 info
->flags
& FBINFO_MODULE
)
606 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
607 depth
= info
->var
.blue
.length
;
608 if (info
->var
.red
.length
< depth
)
609 depth
= info
->var
.red
.length
;
610 if (info
->var
.green
.length
< depth
)
611 depth
= info
->var
.green
.length
;
614 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
615 /* assume console colormap */
619 /* Return if no suitable logo was found */
620 fb_logo
.logo
= fb_find_logo(depth
);
626 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
627 yres
= info
->var
.yres
;
629 yres
= info
->var
.xres
;
631 if (fb_logo
.logo
->height
> yres
) {
636 /* What depth we asked for might be different from what we get */
637 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
639 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
645 if (fb_logo
.depth
> 4 && depth
> 4) {
646 switch (info
->fix
.visual
) {
647 case FB_VISUAL_TRUECOLOR
:
648 fb_logo
.needs_truepalette
= 1;
650 case FB_VISUAL_DIRECTCOLOR
:
651 fb_logo
.needs_directpalette
= 1;
652 fb_logo
.needs_cmapreset
= 1;
654 case FB_VISUAL_PSEUDOCOLOR
:
655 fb_logo
.needs_cmapreset
= 1;
660 return fb_prepare_extra_logos(info
, fb_logo
.logo
->height
, yres
);
663 int fb_show_logo(struct fb_info
*info
, int rotate
)
667 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
669 y
= fb_show_extra_logos(info
, y
, rotate
);
674 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
675 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
676 #endif /* CONFIG_LOGO */
677 EXPORT_SYMBOL(fb_show_logo
);
679 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
681 mutex_lock(®istration_lock
);
682 return (*pos
< FB_MAX
) ? pos
: NULL
;
685 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
688 return (*pos
< FB_MAX
) ? pos
: NULL
;
691 static void fb_seq_stop(struct seq_file
*m
, void *v
)
693 mutex_unlock(®istration_lock
);
696 static int fb_seq_show(struct seq_file
*m
, void *v
)
698 int i
= *(loff_t
*)v
;
699 struct fb_info
*fi
= registered_fb
[i
];
702 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
706 static const struct seq_operations proc_fb_seq_ops
= {
707 .start
= fb_seq_start
,
713 static int proc_fb_open(struct inode
*inode
, struct file
*file
)
715 return seq_open(file
, &proc_fb_seq_ops
);
718 static const struct file_operations fb_proc_fops
= {
719 .owner
= THIS_MODULE
,
720 .open
= proc_fb_open
,
723 .release
= seq_release
,
727 * We hold a reference to the fb_info in file->private_data,
728 * but if the current registered fb has changed, we don't
729 * actually want to use it.
731 * So look up the fb_info using the inode minor number,
732 * and just verify it against the reference we have.
734 static struct fb_info
*file_fb_info(struct file
*file
)
736 struct inode
*inode
= file_inode(file
);
737 int fbidx
= iminor(inode
);
738 struct fb_info
*info
= registered_fb
[fbidx
];
740 if (info
!= file
->private_data
)
746 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
748 unsigned long p
= *ppos
;
749 struct fb_info
*info
= file_fb_info(file
);
752 int c
, cnt
= 0, err
= 0;
753 unsigned long total_size
;
755 if (!info
|| ! info
->screen_base
)
758 if (info
->state
!= FBINFO_STATE_RUNNING
)
761 if (info
->fbops
->fb_read
)
762 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
764 total_size
= info
->screen_size
;
767 total_size
= info
->fix
.smem_len
;
772 if (count
>= total_size
)
775 if (count
+ p
> total_size
)
776 count
= total_size
- p
;
778 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
783 src
= (u8 __iomem
*) (info
->screen_base
+ p
);
785 if (info
->fbops
->fb_sync
)
786 info
->fbops
->fb_sync(info
);
789 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
791 fb_memcpy_fromfb(dst
, src
, c
);
795 if (copy_to_user(buf
, buffer
, c
)) {
807 return (err
) ? err
: cnt
;
811 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
813 unsigned long p
= *ppos
;
814 struct fb_info
*info
= file_fb_info(file
);
817 int c
, cnt
= 0, err
= 0;
818 unsigned long total_size
;
820 if (!info
|| !info
->screen_base
)
823 if (info
->state
!= FBINFO_STATE_RUNNING
)
826 if (info
->fbops
->fb_write
)
827 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
829 total_size
= info
->screen_size
;
832 total_size
= info
->fix
.smem_len
;
837 if (count
> total_size
) {
842 if (count
+ p
> total_size
) {
846 count
= total_size
- p
;
849 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
854 dst
= (u8 __iomem
*) (info
->screen_base
+ p
);
856 if (info
->fbops
->fb_sync
)
857 info
->fbops
->fb_sync(info
);
860 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
863 if (copy_from_user(src
, buf
, c
)) {
868 fb_memcpy_tofb(dst
, src
, c
);
879 return (cnt
) ? cnt
: err
;
883 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
885 struct fb_fix_screeninfo
*fix
= &info
->fix
;
886 unsigned int yres
= info
->var
.yres
;
889 if (var
->yoffset
> 0) {
890 if (var
->vmode
& FB_VMODE_YWRAP
) {
891 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
895 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
899 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
900 (var
->xoffset
% fix
->xpanstep
)))
903 if (err
|| !info
->fbops
->fb_pan_display
||
904 var
->yoffset
> info
->var
.yres_virtual
- yres
||
905 var
->xoffset
> info
->var
.xres_virtual
- info
->var
.xres
)
908 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
910 info
->var
.xoffset
= var
->xoffset
;
911 info
->var
.yoffset
= var
->yoffset
;
912 if (var
->vmode
& FB_VMODE_YWRAP
)
913 info
->var
.vmode
|= FB_VMODE_YWRAP
;
915 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
918 EXPORT_SYMBOL(fb_pan_display
);
920 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
923 struct fb_event event
;
924 struct fb_blit_caps caps
, fbcaps
;
927 memset(&caps
, 0, sizeof(caps
));
928 memset(&fbcaps
, 0, sizeof(fbcaps
));
929 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
932 fb_notifier_call_chain(FB_EVENT_GET_REQ
, &event
);
933 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
935 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
936 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
937 (fbcaps
.len
< caps
.len
))
944 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
946 int flags
= info
->flags
;
949 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
950 struct fb_videomode mode1
, mode2
;
952 fb_var_to_videomode(&mode1
, var
);
953 fb_var_to_videomode(&mode2
, &info
->var
);
954 /* make sure we don't delete the videomode of current var */
955 ret
= fb_mode_is_equal(&mode1
, &mode2
);
958 struct fb_event event
;
962 ret
= fb_notifier_call_chain(FB_EVENT_MODE_DELETE
, &event
);
966 fb_delete_videomode(&mode1
, &info
->modelist
);
969 ret
= (ret
) ? -EINVAL
: 0;
973 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
974 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
975 u32 activate
= var
->activate
;
977 /* When using FOURCC mode, make sure the red, green, blue and
978 * transp fields are set to 0.
980 if ((info
->fix
.capabilities
& FB_CAP_FOURCC
) &&
981 var
->grayscale
> 1) {
982 if (var
->red
.offset
|| var
->green
.offset
||
983 var
->blue
.offset
|| var
->transp
.offset
||
984 var
->red
.length
|| var
->green
.length
||
985 var
->blue
.length
|| var
->transp
.length
||
986 var
->red
.msb_right
|| var
->green
.msb_right
||
987 var
->blue
.msb_right
|| var
->transp
.msb_right
)
991 if (!info
->fbops
->fb_check_var
) {
996 ret
= info
->fbops
->fb_check_var(var
, info
);
1001 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
1002 struct fb_var_screeninfo old_var
;
1003 struct fb_videomode mode
;
1005 if (info
->fbops
->fb_get_caps
) {
1006 ret
= fb_check_caps(info
, var
, activate
);
1012 old_var
= info
->var
;
1015 if (info
->fbops
->fb_set_par
) {
1016 ret
= info
->fbops
->fb_set_par(info
);
1019 info
->var
= old_var
;
1020 printk(KERN_WARNING
"detected "
1021 "fb_set_par error, "
1022 "error code: %d\n", ret
);
1027 fb_pan_display(info
, &info
->var
);
1028 fb_set_cmap(&info
->cmap
, info
);
1029 fb_var_to_videomode(&mode
, &info
->var
);
1031 if (info
->modelist
.prev
&& info
->modelist
.next
&&
1032 !list_empty(&info
->modelist
))
1033 ret
= fb_add_videomode(&mode
, &info
->modelist
);
1035 if (!ret
&& (flags
& FBINFO_MISC_USEREVENT
)) {
1036 struct fb_event event
;
1037 int evnt
= (activate
& FB_ACTIVATE_ALL
) ?
1038 FB_EVENT_MODE_CHANGE_ALL
:
1039 FB_EVENT_MODE_CHANGE
;
1041 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1044 fb_notifier_call_chain(evnt
, &event
);
1052 EXPORT_SYMBOL(fb_set_var
);
1055 fb_blank(struct fb_info
*info
, int blank
)
1057 struct fb_event event
;
1058 int ret
= -EINVAL
, early_ret
;
1060 if (blank
> FB_BLANK_POWERDOWN
)
1061 blank
= FB_BLANK_POWERDOWN
;
1064 event
.data
= &blank
;
1066 early_ret
= fb_notifier_call_chain(FB_EARLY_EVENT_BLANK
, &event
);
1068 if (info
->fbops
->fb_blank
)
1069 ret
= info
->fbops
->fb_blank(blank
, info
);
1072 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1075 * if fb_blank is failed then revert effects of
1076 * the early blank event.
1079 fb_notifier_call_chain(FB_R_EARLY_EVENT_BLANK
, &event
);
1084 EXPORT_SYMBOL(fb_blank
);
1086 static long do_fb_ioctl(struct fb_info
*info
, unsigned int cmd
,
1090 struct fb_var_screeninfo var
;
1091 struct fb_fix_screeninfo fix
;
1092 struct fb_con2fbmap con2fb
;
1093 struct fb_cmap cmap_from
;
1094 struct fb_cmap_user cmap
;
1095 struct fb_event event
;
1096 void __user
*argp
= (void __user
*)arg
;
1100 case FBIOGET_VSCREENINFO
:
1101 if (!lock_fb_info(info
))
1104 unlock_fb_info(info
);
1106 ret
= copy_to_user(argp
, &var
, sizeof(var
)) ? -EFAULT
: 0;
1108 case FBIOPUT_VSCREENINFO
:
1109 if (copy_from_user(&var
, argp
, sizeof(var
)))
1112 if (!lock_fb_info(info
)) {
1116 info
->flags
|= FBINFO_MISC_USEREVENT
;
1117 ret
= fb_set_var(info
, &var
);
1118 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1119 unlock_fb_info(info
);
1121 if (!ret
&& copy_to_user(argp
, &var
, sizeof(var
)))
1124 case FBIOGET_FSCREENINFO
:
1125 if (!lock_fb_info(info
))
1128 unlock_fb_info(info
);
1130 ret
= copy_to_user(argp
, &fix
, sizeof(fix
)) ? -EFAULT
: 0;
1133 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1135 ret
= fb_set_user_cmap(&cmap
, info
);
1138 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1140 if (!lock_fb_info(info
))
1142 cmap_from
= info
->cmap
;
1143 unlock_fb_info(info
);
1144 ret
= fb_cmap_to_user(&cmap_from
, &cmap
);
1146 case FBIOPAN_DISPLAY
:
1147 if (copy_from_user(&var
, argp
, sizeof(var
)))
1150 if (!lock_fb_info(info
)) {
1154 ret
= fb_pan_display(info
, &var
);
1155 unlock_fb_info(info
);
1157 if (ret
== 0 && copy_to_user(argp
, &var
, sizeof(var
)))
1163 case FBIOGET_CON2FBMAP
:
1164 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1166 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1168 con2fb
.framebuffer
= -1;
1169 event
.data
= &con2fb
;
1170 if (!lock_fb_info(info
))
1173 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP
, &event
);
1174 unlock_fb_info(info
);
1175 ret
= copy_to_user(argp
, &con2fb
, sizeof(con2fb
)) ? -EFAULT
: 0;
1177 case FBIOPUT_CON2FBMAP
:
1178 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
1180 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
1182 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
1184 if (!registered_fb
[con2fb
.framebuffer
])
1185 request_module("fb%d", con2fb
.framebuffer
);
1186 if (!registered_fb
[con2fb
.framebuffer
]) {
1190 event
.data
= &con2fb
;
1192 if (!lock_fb_info(info
)) {
1197 ret
= fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP
, &event
);
1198 unlock_fb_info(info
);
1203 if (!lock_fb_info(info
)) {
1207 info
->flags
|= FBINFO_MISC_USEREVENT
;
1208 ret
= fb_blank(info
, arg
);
1209 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1210 unlock_fb_info(info
);
1214 if (!lock_fb_info(info
))
1218 ret
= fb
->fb_ioctl(info
, cmd
, arg
);
1221 unlock_fb_info(info
);
1226 static long fb_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1228 struct fb_info
*info
= file_fb_info(file
);
1232 return do_fb_ioctl(info
, cmd
, arg
);
1235 #ifdef CONFIG_COMPAT
1236 struct fb_fix_screeninfo32
{
1238 compat_caddr_t smem_start
;
1247 compat_caddr_t mmio_start
;
1257 compat_caddr_t green
;
1258 compat_caddr_t blue
;
1259 compat_caddr_t transp
;
1262 static int fb_getput_cmap(struct fb_info
*info
, unsigned int cmd
,
1265 struct fb_cmap_user __user
*cmap
;
1266 struct fb_cmap32 __user
*cmap32
;
1270 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1271 cmap32
= compat_ptr(arg
);
1273 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1276 if (get_user(data
, &cmap32
->red
) ||
1277 put_user(compat_ptr(data
), &cmap
->red
) ||
1278 get_user(data
, &cmap32
->green
) ||
1279 put_user(compat_ptr(data
), &cmap
->green
) ||
1280 get_user(data
, &cmap32
->blue
) ||
1281 put_user(compat_ptr(data
), &cmap
->blue
) ||
1282 get_user(data
, &cmap32
->transp
) ||
1283 put_user(compat_ptr(data
), &cmap
->transp
))
1286 err
= do_fb_ioctl(info
, cmd
, (unsigned long) cmap
);
1289 if (copy_in_user(&cmap32
->start
,
1297 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1298 struct fb_fix_screeninfo32 __user
*fix32
)
1303 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1305 data
= (__u32
) (unsigned long) fix
->smem_start
;
1306 err
|= put_user(data
, &fix32
->smem_start
);
1308 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1309 err
|= put_user(fix
->type
, &fix32
->type
);
1310 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1311 err
|= put_user(fix
->visual
, &fix32
->visual
);
1312 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1313 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1314 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1315 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1317 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1318 err
|= put_user(data
, &fix32
->mmio_start
);
1320 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1321 err
|= put_user(fix
->accel
, &fix32
->accel
);
1322 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1323 sizeof(fix
->reserved
));
1330 static int fb_get_fscreeninfo(struct fb_info
*info
, unsigned int cmd
,
1333 mm_segment_t old_fs
;
1334 struct fb_fix_screeninfo fix
;
1335 struct fb_fix_screeninfo32 __user
*fix32
;
1338 fix32
= compat_ptr(arg
);
1342 err
= do_fb_ioctl(info
, cmd
, (unsigned long) &fix
);
1346 err
= do_fscreeninfo_to_user(&fix
, fix32
);
1351 static long fb_compat_ioctl(struct file
*file
, unsigned int cmd
,
1354 struct fb_info
*info
= file_fb_info(file
);
1356 long ret
= -ENOIOCTLCMD
;
1362 case FBIOGET_VSCREENINFO
:
1363 case FBIOPUT_VSCREENINFO
:
1364 case FBIOPAN_DISPLAY
:
1365 case FBIOGET_CON2FBMAP
:
1366 case FBIOPUT_CON2FBMAP
:
1367 arg
= (unsigned long) compat_ptr(arg
);
1369 ret
= do_fb_ioctl(info
, cmd
, arg
);
1372 case FBIOGET_FSCREENINFO
:
1373 ret
= fb_get_fscreeninfo(info
, cmd
, arg
);
1378 ret
= fb_getput_cmap(info
, cmd
, arg
);
1382 if (fb
->fb_compat_ioctl
)
1383 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1391 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1393 struct fb_info
*info
= file_fb_info(file
);
1395 unsigned long mmio_pgoff
;
1396 unsigned long start
;
1404 mutex_lock(&info
->mm_lock
);
1407 res
= fb
->fb_mmap(info
, vma
);
1408 mutex_unlock(&info
->mm_lock
);
1413 * Ugh. This can be either the frame buffer mapping, or
1414 * if pgoff points past it, the mmio mapping.
1416 start
= info
->fix
.smem_start
;
1417 len
= info
->fix
.smem_len
;
1418 mmio_pgoff
= PAGE_ALIGN((start
& ~PAGE_MASK
) + len
) >> PAGE_SHIFT
;
1419 if (vma
->vm_pgoff
>= mmio_pgoff
) {
1420 if (info
->var
.accel_flags
) {
1421 mutex_unlock(&info
->mm_lock
);
1425 vma
->vm_pgoff
-= mmio_pgoff
;
1426 start
= info
->fix
.mmio_start
;
1427 len
= info
->fix
.mmio_len
;
1429 mutex_unlock(&info
->mm_lock
);
1431 vma
->vm_page_prot
= vm_get_page_prot(vma
->vm_flags
);
1432 fb_pgprotect(file
, vma
, start
);
1434 return vm_iomap_memory(vma
, start
, len
);
1438 fb_open(struct inode
*inode
, struct file
*file
)
1439 __acquires(&info
->lock
)
1440 __releases(&info
->lock
)
1442 int fbidx
= iminor(inode
);
1443 struct fb_info
*info
;
1446 info
= get_fb_info(fbidx
);
1448 request_module("fb%d", fbidx
);
1449 info
= get_fb_info(fbidx
);
1454 return PTR_ERR(info
);
1456 mutex_lock(&info
->lock
);
1457 if (!try_module_get(info
->fbops
->owner
)) {
1461 file
->private_data
= info
;
1462 if (info
->fbops
->fb_open
) {
1463 res
= info
->fbops
->fb_open(info
,1);
1465 module_put(info
->fbops
->owner
);
1467 #ifdef CONFIG_FB_DEFERRED_IO
1469 fb_deferred_io_open(info
, inode
, file
);
1472 mutex_unlock(&info
->lock
);
1479 fb_release(struct inode
*inode
, struct file
*file
)
1480 __acquires(&info
->lock
)
1481 __releases(&info
->lock
)
1483 struct fb_info
* const info
= file
->private_data
;
1485 mutex_lock(&info
->lock
);
1486 if (info
->fbops
->fb_release
)
1487 info
->fbops
->fb_release(info
,1);
1488 module_put(info
->fbops
->owner
);
1489 mutex_unlock(&info
->lock
);
1494 static const struct file_operations fb_fops
= {
1495 .owner
= THIS_MODULE
,
1498 .unlocked_ioctl
= fb_ioctl
,
1499 #ifdef CONFIG_COMPAT
1500 .compat_ioctl
= fb_compat_ioctl
,
1504 .release
= fb_release
,
1505 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1506 .get_unmapped_area
= get_fb_unmapped_area
,
1508 #ifdef CONFIG_FB_DEFERRED_IO
1509 .fsync
= fb_deferred_io_fsync
,
1511 .llseek
= default_llseek
,
1514 struct class *fb_class
;
1515 EXPORT_SYMBOL(fb_class
);
1517 static int fb_check_foreignness(struct fb_info
*fi
)
1519 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1521 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1524 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1526 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1527 #endif /* __BIG_ENDIAN */
1529 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1530 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1531 "support this framebuffer\n", fi
->fix
.id
);
1533 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1534 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1535 "support this framebuffer\n", fi
->fix
.id
);
1542 static bool apertures_overlap(struct aperture
*gen
, struct aperture
*hw
)
1544 /* is the generic aperture base the same as the HW one */
1545 if (gen
->base
== hw
->base
)
1547 /* is the generic aperture base inside the hw base->hw base+size */
1548 if (gen
->base
> hw
->base
&& gen
->base
< hw
->base
+ hw
->size
)
1553 static bool fb_do_apertures_overlap(struct apertures_struct
*gena
,
1554 struct apertures_struct
*hwa
)
1560 for (i
= 0; i
< hwa
->count
; ++i
) {
1561 struct aperture
*h
= &hwa
->ranges
[i
];
1562 for (j
= 0; j
< gena
->count
; ++j
) {
1563 struct aperture
*g
= &gena
->ranges
[j
];
1564 printk(KERN_DEBUG
"checking generic (%llx %llx) vs hw (%llx %llx)\n",
1565 (unsigned long long)g
->base
,
1566 (unsigned long long)g
->size
,
1567 (unsigned long long)h
->base
,
1568 (unsigned long long)h
->size
);
1569 if (apertures_overlap(g
, h
))
1577 static int do_unregister_framebuffer(struct fb_info
*fb_info
);
1579 #define VGA_FB_PHYS 0xA0000
1580 static void do_remove_conflicting_framebuffers(struct apertures_struct
*a
,
1581 const char *name
, bool primary
)
1585 /* check all firmware fbs and kick off if the base addr overlaps */
1586 for (i
= 0 ; i
< FB_MAX
; i
++) {
1587 struct apertures_struct
*gen_aper
;
1588 if (!registered_fb
[i
])
1591 if (!(registered_fb
[i
]->flags
& FBINFO_MISC_FIRMWARE
))
1594 gen_aper
= registered_fb
[i
]->apertures
;
1595 if (fb_do_apertures_overlap(gen_aper
, a
) ||
1596 (primary
&& gen_aper
&& gen_aper
->count
&&
1597 gen_aper
->ranges
[0].base
== VGA_FB_PHYS
)) {
1599 printk(KERN_INFO
"fb: conflicting fb hw usage "
1600 "%s vs %s - removing generic driver\n",
1601 name
, registered_fb
[i
]->fix
.id
);
1602 do_unregister_framebuffer(registered_fb
[i
]);
1607 static int do_register_framebuffer(struct fb_info
*fb_info
)
1610 struct fb_event event
;
1611 struct fb_videomode mode
;
1613 if (fb_check_foreignness(fb_info
))
1616 do_remove_conflicting_framebuffers(fb_info
->apertures
, fb_info
->fix
.id
,
1617 fb_is_primary_device(fb_info
));
1619 if (num_registered_fb
== FB_MAX
)
1622 num_registered_fb
++;
1623 for (i
= 0 ; i
< FB_MAX
; i
++)
1624 if (!registered_fb
[i
])
1627 atomic_set(&fb_info
->count
, 1);
1628 mutex_init(&fb_info
->lock
);
1629 mutex_init(&fb_info
->mm_lock
);
1631 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1632 MKDEV(FB_MAJOR
, i
), NULL
, "fb%d", i
);
1633 if (IS_ERR(fb_info
->dev
)) {
1635 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1636 fb_info
->dev
= NULL
;
1638 fb_init_device(fb_info
);
1640 if (fb_info
->pixmap
.addr
== NULL
) {
1641 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1642 if (fb_info
->pixmap
.addr
) {
1643 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1644 fb_info
->pixmap
.buf_align
= 1;
1645 fb_info
->pixmap
.scan_align
= 1;
1646 fb_info
->pixmap
.access_align
= 32;
1647 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1650 fb_info
->pixmap
.offset
= 0;
1652 if (!fb_info
->pixmap
.blit_x
)
1653 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1655 if (!fb_info
->pixmap
.blit_y
)
1656 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1658 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1659 INIT_LIST_HEAD(&fb_info
->modelist
);
1661 if (fb_info
->skip_vt_switch
)
1662 pm_vt_switch_required(fb_info
->dev
, false);
1664 pm_vt_switch_required(fb_info
->dev
, true);
1666 fb_var_to_videomode(&mode
, &fb_info
->var
);
1667 fb_add_videomode(&mode
, &fb_info
->modelist
);
1668 registered_fb
[i
] = fb_info
;
1670 event
.info
= fb_info
;
1672 if (!lock_fb_info(fb_info
)) {
1677 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1678 unlock_fb_info(fb_info
);
1683 static int do_unregister_framebuffer(struct fb_info
*fb_info
)
1685 struct fb_event event
;
1689 if (i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
)
1693 if (!lock_fb_info(fb_info
)) {
1698 event
.info
= fb_info
;
1699 ret
= fb_notifier_call_chain(FB_EVENT_FB_UNBIND
, &event
);
1700 unlock_fb_info(fb_info
);
1706 pm_vt_switch_unregister(fb_info
->dev
);
1708 unlink_framebuffer(fb_info
);
1709 if (fb_info
->pixmap
.addr
&&
1710 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1711 kfree(fb_info
->pixmap
.addr
);
1712 fb_destroy_modelist(&fb_info
->modelist
);
1713 registered_fb
[i
] = NULL
;
1714 num_registered_fb
--;
1715 fb_cleanup_device(fb_info
);
1716 event
.info
= fb_info
;
1718 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1721 /* this may free fb info */
1722 put_fb_info(fb_info
);
1726 int unlink_framebuffer(struct fb_info
*fb_info
)
1731 if (i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
)
1735 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1736 fb_info
->dev
= NULL
;
1740 EXPORT_SYMBOL(unlink_framebuffer
);
1742 void remove_conflicting_framebuffers(struct apertures_struct
*a
,
1743 const char *name
, bool primary
)
1745 mutex_lock(®istration_lock
);
1746 do_remove_conflicting_framebuffers(a
, name
, primary
);
1747 mutex_unlock(®istration_lock
);
1749 EXPORT_SYMBOL(remove_conflicting_framebuffers
);
1752 * register_framebuffer - registers a frame buffer device
1753 * @fb_info: frame buffer info structure
1755 * Registers a frame buffer device @fb_info.
1757 * Returns negative errno on error, or zero for success.
1761 register_framebuffer(struct fb_info
*fb_info
)
1765 mutex_lock(®istration_lock
);
1766 ret
= do_register_framebuffer(fb_info
);
1767 mutex_unlock(®istration_lock
);
1771 EXPORT_SYMBOL(register_framebuffer
);
1774 * unregister_framebuffer - releases a frame buffer device
1775 * @fb_info: frame buffer info structure
1777 * Unregisters a frame buffer device @fb_info.
1779 * Returns negative errno on error, or zero for success.
1781 * This function will also notify the framebuffer console
1782 * to release the driver.
1784 * This is meant to be called within a driver's module_exit()
1785 * function. If this is called outside module_exit(), ensure
1786 * that the driver implements fb_open() and fb_release() to
1787 * check that no processes are using the device.
1790 unregister_framebuffer(struct fb_info
*fb_info
)
1794 mutex_lock(®istration_lock
);
1795 ret
= do_unregister_framebuffer(fb_info
);
1796 mutex_unlock(®istration_lock
);
1800 EXPORT_SYMBOL(unregister_framebuffer
);
1803 * fb_set_suspend - low level driver signals suspend
1804 * @info: framebuffer affected
1805 * @state: 0 = resuming, !=0 = suspending
1807 * This is meant to be used by low level drivers to
1808 * signal suspend/resume to the core & clients.
1809 * It must be called with the console semaphore held
1811 void fb_set_suspend(struct fb_info
*info
, int state
)
1813 struct fb_event event
;
1817 fb_notifier_call_chain(FB_EVENT_SUSPEND
, &event
);
1818 info
->state
= FBINFO_STATE_SUSPENDED
;
1820 info
->state
= FBINFO_STATE_RUNNING
;
1821 fb_notifier_call_chain(FB_EVENT_RESUME
, &event
);
1824 EXPORT_SYMBOL(fb_set_suspend
);
1827 * fbmem_init - init frame buffer subsystem
1829 * Initialize the frame buffer subsystem.
1831 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1838 proc_create("fb", 0, NULL
, &fb_proc_fops
);
1840 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1841 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1843 fb_class
= class_create(THIS_MODULE
, "graphics");
1844 if (IS_ERR(fb_class
)) {
1845 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1852 module_init(fbmem_init
);
1856 remove_proc_entry("fb", NULL
);
1857 class_destroy(fb_class
);
1858 unregister_chrdev(FB_MAJOR
, "fb");
1861 module_exit(fbmem_exit
);
1862 MODULE_LICENSE("GPL");
1863 MODULE_DESCRIPTION("Framebuffer base");
1865 subsys_initcall(fbmem_init
);
1868 int fb_new_modelist(struct fb_info
*info
)
1870 struct fb_event event
;
1871 struct fb_var_screeninfo var
= info
->var
;
1872 struct list_head
*pos
, *n
;
1873 struct fb_modelist
*modelist
;
1874 struct fb_videomode
*m
, mode
;
1877 list_for_each_safe(pos
, n
, &info
->modelist
) {
1878 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1879 m
= &modelist
->mode
;
1880 fb_videomode_to_var(&var
, m
);
1881 var
.activate
= FB_ACTIVATE_TEST
;
1882 err
= fb_set_var(info
, &var
);
1883 fb_var_to_videomode(&mode
, &var
);
1884 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1892 if (!list_empty(&info
->modelist
)) {
1894 err
= fb_notifier_call_chain(FB_EVENT_NEW_MODELIST
, &event
);
1900 static char *video_options
[FB_MAX
] __read_mostly
;
1901 static int ofonly __read_mostly
;
1904 * fb_get_options - get kernel boot parameters
1905 * @name: framebuffer name as it would appear in
1906 * the boot parameter line
1907 * (video=<name>:<options>)
1908 * @option: the option will be stored here
1910 * NOTE: Needed to maintain backwards compatibility
1912 int fb_get_options(const char *name
, char **option
)
1914 char *opt
, *options
= NULL
;
1916 int name_len
= strlen(name
), i
;
1918 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1921 if (name_len
&& !retval
) {
1922 for (i
= 0; i
< FB_MAX
; i
++) {
1923 if (video_options
[i
] == NULL
)
1925 if (!video_options
[i
][0])
1927 opt
= video_options
[i
];
1928 if (!strncmp(name
, opt
, name_len
) &&
1929 opt
[name_len
] == ':')
1930 options
= opt
+ name_len
+ 1;
1933 if (options
&& !strncmp(options
, "off", 3))
1941 EXPORT_SYMBOL(fb_get_options
);
1945 * video_setup - process command line options
1946 * @options: string of options
1948 * Process command line options for frame buffer subsystem.
1950 * NOTE: This function is a __setup and __init function.
1951 * It only stores the options. Drivers have to call
1952 * fb_get_options() as necessary.
1957 static int __init
video_setup(char *options
)
1961 if (!options
|| !*options
)
1964 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1969 if (!global
&& !strchr(options
, ':')) {
1970 fb_mode_option
= options
;
1975 for (i
= 0; i
< FB_MAX
; i
++) {
1976 if (video_options
[i
] == NULL
) {
1977 video_options
[i
] = options
;
1986 __setup("video=", video_setup
);
1989 MODULE_LICENSE("GPL");