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>
35 #include <linux/fbcon.h>
36 #include <linux/mem_encrypt.h>
37 #include <linux/pci.h>
43 * Frame buffer device initialization and setup routines
46 #define FBPIXMAPSIZE (1024 * 8)
48 static DEFINE_MUTEX(registration_lock
);
50 struct fb_info
*registered_fb
[FB_MAX
] __read_mostly
;
51 EXPORT_SYMBOL(registered_fb
);
53 int num_registered_fb __read_mostly
;
54 EXPORT_SYMBOL(num_registered_fb
);
56 bool fb_center_logo __read_mostly
;
58 int fb_logo_count __read_mostly
= -1;
60 static struct fb_info
*get_fb_info(unsigned int idx
)
62 struct fb_info
*fb_info
;
65 return ERR_PTR(-ENODEV
);
67 mutex_lock(®istration_lock
);
68 fb_info
= registered_fb
[idx
];
70 refcount_inc(&fb_info
->count
);
71 mutex_unlock(®istration_lock
);
76 static void put_fb_info(struct fb_info
*fb_info
)
78 if (!refcount_dec_and_test(&fb_info
->count
))
80 if (fb_info
->fbops
->fb_destroy
)
81 fb_info
->fbops
->fb_destroy(fb_info
);
88 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
89 struct fb_fix_screeninfo
*fix
)
93 if (fix
->visual
== FB_VISUAL_MONO01
||
94 fix
->visual
== FB_VISUAL_MONO10
)
97 if (var
->green
.length
== var
->blue
.length
&&
98 var
->green
.length
== var
->red
.length
&&
99 var
->green
.offset
== var
->blue
.offset
&&
100 var
->green
.offset
== var
->red
.offset
)
101 depth
= var
->green
.length
;
103 depth
= var
->green
.length
+ var
->red
.length
+
109 EXPORT_SYMBOL(fb_get_color_depth
);
112 * Data padding functions.
114 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
116 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
118 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
120 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
121 u32 shift_high
, u32 shift_low
, u32 mod
)
123 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
126 for (i
= height
; i
--; ) {
127 for (j
= 0; j
< idx
; j
++) {
130 tmp
|= *src
>> shift_low
;
132 tmp
= *src
<< shift_high
;
138 tmp
|= *src
>> shift_low
;
140 if (shift_high
< mod
) {
141 tmp
= *src
<< shift_high
;
148 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
151 * we need to lock this section since fb_cursor
152 * may use fb_imageblit()
154 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
156 u32 align
= buf
->buf_align
- 1, offset
;
157 char *addr
= buf
->addr
;
159 /* If IO mapped, we need to sync before access, no sharing of
162 if (buf
->flags
& FB_PIXMAP_IO
) {
163 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
164 info
->fbops
->fb_sync(info
);
168 /* See if we fit in the remaining pixmap space */
169 offset
= buf
->offset
+ align
;
171 if (offset
+ size
> buf
->size
) {
172 /* We do not fit. In order to be able to re-use the buffer,
173 * we must ensure no asynchronous DMA'ing or whatever operation
174 * is in progress, we sync for that.
176 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
177 info
->fbops
->fb_sync(info
);
180 buf
->offset
= offset
+ size
;
185 EXPORT_SYMBOL(fb_get_buffer_offset
);
189 static inline unsigned safe_shift(unsigned d
, int n
)
191 return n
< 0 ? d
>> -n
: d
<< n
;
194 static void fb_set_logocmap(struct fb_info
*info
,
195 const struct linux_logo
*logo
)
197 struct fb_cmap palette_cmap
;
198 u16 palette_green
[16];
199 u16 palette_blue
[16];
202 const unsigned char *clut
= logo
->clut
;
204 palette_cmap
.start
= 0;
205 palette_cmap
.len
= 16;
206 palette_cmap
.red
= palette_red
;
207 palette_cmap
.green
= palette_green
;
208 palette_cmap
.blue
= palette_blue
;
209 palette_cmap
.transp
= NULL
;
211 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
212 n
= logo
->clutsize
- i
;
213 /* palette_cmap provides space for only 16 colors at once */
216 palette_cmap
.start
= 32 + i
;
217 palette_cmap
.len
= n
;
218 for (j
= 0; j
< n
; ++j
) {
219 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
220 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
221 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
224 fb_set_cmap(&palette_cmap
, info
);
228 static void fb_set_logo_truepalette(struct fb_info
*info
,
229 const struct linux_logo
*logo
,
232 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
233 unsigned char redmask
, greenmask
, bluemask
;
234 int redshift
, greenshift
, blueshift
;
236 const unsigned char *clut
= logo
->clut
;
239 * We have to create a temporary palette since console palette is only
242 /* Bug: Doesn't obey msb_right ... (who needs that?) */
243 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
244 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
245 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
246 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
247 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
248 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
250 for ( i
= 0; i
< logo
->clutsize
; i
++) {
251 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
252 safe_shift((clut
[1] & greenmask
), greenshift
) |
253 safe_shift((clut
[2] & bluemask
), blueshift
));
258 static void fb_set_logo_directpalette(struct fb_info
*info
,
259 const struct linux_logo
*logo
,
262 int redshift
, greenshift
, blueshift
;
265 redshift
= info
->var
.red
.offset
;
266 greenshift
= info
->var
.green
.offset
;
267 blueshift
= info
->var
.blue
.offset
;
269 for (i
= 32; i
< 32 + logo
->clutsize
; i
++)
270 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
273 static void fb_set_logo(struct fb_info
*info
,
274 const struct linux_logo
*logo
, u8
*dst
,
278 const u8
*src
= logo
->data
;
279 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
282 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
294 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
295 info
->fix
.visual
== FB_VISUAL_MONO10
)
296 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
300 for (i
= 0; i
< logo
->height
; i
++)
301 for (j
= 0; j
< logo
->width
; src
++) {
304 if (j
< logo
->width
) {
305 *dst
++ = *src
& 0x0f;
311 for (i
= 0; i
< logo
->height
; i
++) {
312 for (j
= 0; j
< logo
->width
; src
++) {
314 for (k
= 7; k
>= 0 && j
< logo
->width
; k
--) {
315 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
325 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
326 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
327 * the visual format and color depth of the framebuffer, the DAC, the
328 * pseudo_palette, and the logo data will be adjusted accordingly.
330 * Case 1 - linux_logo_clut224:
331 * Color exceeds the number of console colors (16), thus we set the hardware DAC
332 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
334 * For visuals that require color info from the pseudo_palette, we also construct
335 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
338 * Case 2 - linux_logo_vga16:
339 * The number of colors just matches the console colors, thus there is no need
340 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
341 * each byte contains color information for two pixels (upper and lower nibble).
342 * To be consistent with fb_imageblit() usage, we therefore separate the two
343 * nibbles into separate bytes. The "depth" flag will be set to 4.
345 * Case 3 - linux_logo_mono:
346 * This is similar with Case 2. Each byte contains information for 8 pixels.
347 * We isolate each bit and expand each into a byte. The "depth" flag will
350 static struct logo_data
{
352 int needs_directpalette
;
353 int needs_truepalette
;
355 const struct linux_logo
*logo
;
356 } fb_logo __read_mostly
;
358 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
360 u32 size
= width
* height
, i
;
364 for (i
= size
; i
--; )
368 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
370 int i
, j
, h
= height
- 1;
372 for (i
= 0; i
< height
; i
++)
373 for (j
= 0; j
< width
; j
++)
374 out
[height
* j
+ h
- i
] = *in
++;
377 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
379 int i
, j
, w
= width
- 1;
381 for (i
= 0; i
< height
; i
++)
382 for (j
= 0; j
< width
; j
++)
383 out
[height
* (w
- j
) + i
] = *in
++;
386 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
387 struct fb_image
*image
, int rotate
)
391 if (rotate
== FB_ROTATE_UD
) {
392 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
394 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
395 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
396 } else if (rotate
== FB_ROTATE_CW
) {
397 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
400 image
->width
= image
->height
;
403 image
->dy
= image
->dx
;
404 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
405 } else if (rotate
== FB_ROTATE_CCW
) {
406 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
409 image
->width
= image
->height
;
412 image
->dx
= image
->dy
;
413 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
419 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
420 int rotate
, unsigned int num
)
424 if (image
->width
> info
->var
.xres
|| image
->height
> info
->var
.yres
)
427 if (rotate
== FB_ROTATE_UR
) {
429 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
431 info
->fbops
->fb_imageblit(info
, image
);
432 image
->dx
+= image
->width
+ 8;
434 } else if (rotate
== FB_ROTATE_UD
) {
437 for (x
= 0; x
< num
&& image
->dx
<= dx
; x
++) {
438 info
->fbops
->fb_imageblit(info
, image
);
439 image
->dx
-= image
->width
+ 8;
441 } else if (rotate
== FB_ROTATE_CW
) {
443 x
< num
&& image
->dy
+ image
->height
<= info
->var
.yres
;
445 info
->fbops
->fb_imageblit(info
, image
);
446 image
->dy
+= image
->height
+ 8;
448 } else if (rotate
== FB_ROTATE_CCW
) {
451 for (x
= 0; x
< num
&& image
->dy
<= dy
; x
++) {
452 info
->fbops
->fb_imageblit(info
, image
);
453 image
->dy
-= image
->height
+ 8;
458 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
459 const struct linux_logo
*logo
, int y
,
462 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
463 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
464 struct fb_image image
;
466 /* Return if the frame buffer is not mapped or suspended */
467 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
472 image
.data
= logo
->data
;
474 if (fb_logo
.needs_cmapreset
)
475 fb_set_logocmap(info
, logo
);
477 if (fb_logo
.needs_truepalette
||
478 fb_logo
.needs_directpalette
) {
479 palette
= kmalloc(256 * 4, GFP_KERNEL
);
483 if (fb_logo
.needs_truepalette
)
484 fb_set_logo_truepalette(info
, logo
, palette
);
486 fb_set_logo_directpalette(info
, logo
, palette
);
488 saved_pseudo_palette
= info
->pseudo_palette
;
489 info
->pseudo_palette
= palette
;
492 if (fb_logo
.depth
<= 4) {
493 logo_new
= kmalloc_array(logo
->width
, logo
->height
,
495 if (logo_new
== NULL
) {
497 if (saved_pseudo_palette
)
498 info
->pseudo_palette
= saved_pseudo_palette
;
501 image
.data
= logo_new
;
502 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
505 if (fb_center_logo
) {
506 int xres
= info
->var
.xres
;
507 int yres
= info
->var
.yres
;
509 if (rotate
== FB_ROTATE_CW
|| rotate
== FB_ROTATE_CCW
) {
510 xres
= info
->var
.yres
;
511 yres
= info
->var
.xres
;
514 while (n
&& (n
* (logo
->width
+ 8) - 8 > xres
))
516 image
.dx
= (xres
- n
* (logo
->width
+ 8) - 8) / 2;
517 image
.dy
= y
?: (yres
- logo
->height
) / 2;
523 image
.width
= logo
->width
;
524 image
.height
= logo
->height
;
527 logo_rotate
= kmalloc_array(logo
->width
, logo
->height
,
530 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
533 fb_do_show_logo(info
, &image
, rotate
, n
);
536 if (saved_pseudo_palette
!= NULL
)
537 info
->pseudo_palette
= saved_pseudo_palette
;
540 return image
.dy
+ logo
->height
;
544 #ifdef CONFIG_FB_LOGO_EXTRA
546 #define FB_LOGO_EX_NUM_MAX 10
547 static struct logo_data_extra
{
548 const struct linux_logo
*logo
;
550 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
551 static unsigned int fb_logo_ex_num
;
553 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
555 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
558 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
559 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
563 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
568 /* FIXME: logo_ex supports only truecolor fb. */
569 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
572 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
573 if (fb_logo_ex
[i
].logo
->type
!= fb_logo
.logo
->type
) {
574 fb_logo_ex
[i
].logo
= NULL
;
577 height
+= fb_logo_ex
[i
].logo
->height
;
579 height
-= fb_logo_ex
[i
].logo
->height
;
587 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
591 for (i
= 0; i
< fb_logo_ex_num
; i
++)
592 y
= fb_show_logo_line(info
, rotate
,
593 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
598 #else /* !CONFIG_FB_LOGO_EXTRA */
600 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
607 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
612 #endif /* CONFIG_FB_LOGO_EXTRA */
615 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
617 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
621 memset(&fb_logo
, 0, sizeof(struct logo_data
));
623 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
624 info
->fbops
->owner
|| !fb_logo_count
)
627 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
628 depth
= info
->var
.blue
.length
;
629 if (info
->var
.red
.length
< depth
)
630 depth
= info
->var
.red
.length
;
631 if (info
->var
.green
.length
< depth
)
632 depth
= info
->var
.green
.length
;
635 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
636 /* assume console colormap */
640 /* Return if no suitable logo was found */
641 fb_logo
.logo
= fb_find_logo(depth
);
647 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
648 yres
= info
->var
.yres
;
650 yres
= info
->var
.xres
;
652 if (fb_logo
.logo
->height
> yres
) {
657 /* What depth we asked for might be different from what we get */
658 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
660 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
666 if (fb_logo
.depth
> 4 && depth
> 4) {
667 switch (info
->fix
.visual
) {
668 case FB_VISUAL_TRUECOLOR
:
669 fb_logo
.needs_truepalette
= 1;
671 case FB_VISUAL_DIRECTCOLOR
:
672 fb_logo
.needs_directpalette
= 1;
673 fb_logo
.needs_cmapreset
= 1;
675 case FB_VISUAL_PSEUDOCOLOR
:
676 fb_logo
.needs_cmapreset
= 1;
681 height
= fb_logo
.logo
->height
;
683 height
+= (yres
- fb_logo
.logo
->height
) / 2;
685 return fb_prepare_extra_logos(info
, height
, yres
);
688 int fb_show_logo(struct fb_info
*info
, int rotate
)
696 count
= fb_logo_count
< 0 ? num_online_cpus() : fb_logo_count
;
697 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0, count
);
698 y
= fb_show_extra_logos(info
, y
, rotate
);
703 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
704 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
705 #endif /* CONFIG_LOGO */
706 EXPORT_SYMBOL(fb_prepare_logo
);
707 EXPORT_SYMBOL(fb_show_logo
);
709 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
711 mutex_lock(®istration_lock
);
712 return (*pos
< FB_MAX
) ? pos
: NULL
;
715 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
718 return (*pos
< FB_MAX
) ? pos
: NULL
;
721 static void fb_seq_stop(struct seq_file
*m
, void *v
)
723 mutex_unlock(®istration_lock
);
726 static int fb_seq_show(struct seq_file
*m
, void *v
)
728 int i
= *(loff_t
*)v
;
729 struct fb_info
*fi
= registered_fb
[i
];
732 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
736 static const struct seq_operations __maybe_unused proc_fb_seq_ops
= {
737 .start
= fb_seq_start
,
744 * We hold a reference to the fb_info in file->private_data,
745 * but if the current registered fb has changed, we don't
746 * actually want to use it.
748 * So look up the fb_info using the inode minor number,
749 * and just verify it against the reference we have.
751 static struct fb_info
*file_fb_info(struct file
*file
)
753 struct inode
*inode
= file_inode(file
);
754 int fbidx
= iminor(inode
);
755 struct fb_info
*info
= registered_fb
[fbidx
];
757 if (info
!= file
->private_data
)
763 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
765 unsigned long p
= *ppos
;
766 struct fb_info
*info
= file_fb_info(file
);
769 int c
, cnt
= 0, err
= 0;
770 unsigned long total_size
;
772 if (!info
|| ! info
->screen_base
)
775 if (info
->state
!= FBINFO_STATE_RUNNING
)
778 if (info
->fbops
->fb_read
)
779 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
781 total_size
= info
->screen_size
;
784 total_size
= info
->fix
.smem_len
;
789 if (count
>= total_size
)
792 if (count
+ p
> total_size
)
793 count
= total_size
- p
;
795 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
800 src
= (u8 __iomem
*) (info
->screen_base
+ p
);
802 if (info
->fbops
->fb_sync
)
803 info
->fbops
->fb_sync(info
);
806 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
808 fb_memcpy_fromfb(dst
, src
, c
);
812 if (copy_to_user(buf
, buffer
, c
)) {
824 return (err
) ? err
: cnt
;
828 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
830 unsigned long p
= *ppos
;
831 struct fb_info
*info
= file_fb_info(file
);
834 int c
, cnt
= 0, err
= 0;
835 unsigned long total_size
;
837 if (!info
|| !info
->screen_base
)
840 if (info
->state
!= FBINFO_STATE_RUNNING
)
843 if (info
->fbops
->fb_write
)
844 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
846 total_size
= info
->screen_size
;
849 total_size
= info
->fix
.smem_len
;
854 if (count
> total_size
) {
859 if (count
+ p
> total_size
) {
863 count
= total_size
- p
;
866 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
871 dst
= (u8 __iomem
*) (info
->screen_base
+ p
);
873 if (info
->fbops
->fb_sync
)
874 info
->fbops
->fb_sync(info
);
877 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
880 if (copy_from_user(src
, buf
, c
)) {
885 fb_memcpy_tofb(dst
, src
, c
);
896 return (cnt
) ? cnt
: err
;
900 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
902 struct fb_fix_screeninfo
*fix
= &info
->fix
;
903 unsigned int yres
= info
->var
.yres
;
906 if (var
->yoffset
> 0) {
907 if (var
->vmode
& FB_VMODE_YWRAP
) {
908 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
912 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
916 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
917 (var
->xoffset
% fix
->xpanstep
)))
920 if (err
|| !info
->fbops
->fb_pan_display
||
921 var
->yoffset
> info
->var
.yres_virtual
- yres
||
922 var
->xoffset
> info
->var
.xres_virtual
- info
->var
.xres
)
925 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
927 info
->var
.xoffset
= var
->xoffset
;
928 info
->var
.yoffset
= var
->yoffset
;
929 if (var
->vmode
& FB_VMODE_YWRAP
)
930 info
->var
.vmode
|= FB_VMODE_YWRAP
;
932 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
935 EXPORT_SYMBOL(fb_pan_display
);
937 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
940 struct fb_blit_caps caps
, fbcaps
;
943 memset(&caps
, 0, sizeof(caps
));
944 memset(&fbcaps
, 0, sizeof(fbcaps
));
945 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
946 fbcon_get_requirement(info
, &caps
);
947 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
949 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
950 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
951 (fbcaps
.len
< caps
.len
))
958 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
962 struct fb_var_screeninfo old_var
;
963 struct fb_videomode mode
;
964 struct fb_event event
;
966 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
967 struct fb_videomode mode1
, mode2
;
969 fb_var_to_videomode(&mode1
, var
);
970 fb_var_to_videomode(&mode2
, &info
->var
);
971 /* make sure we don't delete the videomode of current var */
972 ret
= fb_mode_is_equal(&mode1
, &mode2
);
974 ret
= fbcon_mode_deleted(info
, &mode1
);
976 fb_delete_videomode(&mode1
, &info
->modelist
);
979 return ret
? -EINVAL
: 0;
982 if (!(var
->activate
& FB_ACTIVATE_FORCE
) &&
983 !memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
)))
986 activate
= var
->activate
;
988 /* When using FOURCC mode, make sure the red, green, blue and
989 * transp fields are set to 0.
991 if ((info
->fix
.capabilities
& FB_CAP_FOURCC
) &&
992 var
->grayscale
> 1) {
993 if (var
->red
.offset
|| var
->green
.offset
||
994 var
->blue
.offset
|| var
->transp
.offset
||
995 var
->red
.length
|| var
->green
.length
||
996 var
->blue
.length
|| var
->transp
.length
||
997 var
->red
.msb_right
|| var
->green
.msb_right
||
998 var
->blue
.msb_right
|| var
->transp
.msb_right
)
1002 if (!info
->fbops
->fb_check_var
) {
1007 /* bitfill_aligned() assumes that it's at least 8x8 */
1008 if (var
->xres
< 8 || var
->yres
< 8)
1011 ret
= info
->fbops
->fb_check_var(var
, info
);
1016 if ((var
->activate
& FB_ACTIVATE_MASK
) != FB_ACTIVATE_NOW
)
1019 if (info
->fbops
->fb_get_caps
) {
1020 ret
= fb_check_caps(info
, var
, activate
);
1026 old_var
= info
->var
;
1029 if (info
->fbops
->fb_set_par
) {
1030 ret
= info
->fbops
->fb_set_par(info
);
1033 info
->var
= old_var
;
1034 printk(KERN_WARNING
"detected "
1035 "fb_set_par error, "
1036 "error code: %d\n", ret
);
1041 fb_pan_display(info
, &info
->var
);
1042 fb_set_cmap(&info
->cmap
, info
);
1043 fb_var_to_videomode(&mode
, &info
->var
);
1045 if (info
->modelist
.prev
&& info
->modelist
.next
&&
1046 !list_empty(&info
->modelist
))
1047 ret
= fb_add_videomode(&mode
, &info
->modelist
);
1054 fb_notifier_call_chain(FB_EVENT_MODE_CHANGE
, &event
);
1058 EXPORT_SYMBOL(fb_set_var
);
1061 fb_blank(struct fb_info
*info
, int blank
)
1063 struct fb_event event
;
1066 if (blank
> FB_BLANK_POWERDOWN
)
1067 blank
= FB_BLANK_POWERDOWN
;
1070 event
.data
= &blank
;
1072 if (info
->fbops
->fb_blank
)
1073 ret
= info
->fbops
->fb_blank(blank
, info
);
1076 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1080 EXPORT_SYMBOL(fb_blank
);
1082 static long do_fb_ioctl(struct fb_info
*info
, unsigned int cmd
,
1085 const struct fb_ops
*fb
;
1086 struct fb_var_screeninfo var
;
1087 struct fb_fix_screeninfo fix
;
1088 struct fb_cmap cmap_from
;
1089 struct fb_cmap_user cmap
;
1090 void __user
*argp
= (void __user
*)arg
;
1094 case FBIOGET_VSCREENINFO
:
1097 unlock_fb_info(info
);
1099 ret
= copy_to_user(argp
, &var
, sizeof(var
)) ? -EFAULT
: 0;
1101 case FBIOPUT_VSCREENINFO
:
1102 if (copy_from_user(&var
, argp
, sizeof(var
)))
1106 ret
= fb_set_var(info
, &var
);
1108 fbcon_update_vcs(info
, var
.activate
& FB_ACTIVATE_ALL
);
1109 unlock_fb_info(info
);
1111 if (!ret
&& copy_to_user(argp
, &var
, sizeof(var
)))
1114 case FBIOGET_FSCREENINFO
:
1116 memcpy(&fix
, &info
->fix
, sizeof(fix
));
1117 if (info
->flags
& FBINFO_HIDE_SMEM_START
)
1119 unlock_fb_info(info
);
1121 ret
= copy_to_user(argp
, &fix
, sizeof(fix
)) ? -EFAULT
: 0;
1124 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1126 ret
= fb_set_user_cmap(&cmap
, info
);
1129 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1132 cmap_from
= info
->cmap
;
1133 unlock_fb_info(info
);
1134 ret
= fb_cmap_to_user(&cmap_from
, &cmap
);
1136 case FBIOPAN_DISPLAY
:
1137 if (copy_from_user(&var
, argp
, sizeof(var
)))
1141 ret
= fb_pan_display(info
, &var
);
1142 unlock_fb_info(info
);
1144 if (ret
== 0 && copy_to_user(argp
, &var
, sizeof(var
)))
1150 case FBIOGET_CON2FBMAP
:
1151 ret
= fbcon_get_con2fb_map_ioctl(argp
);
1153 case FBIOPUT_CON2FBMAP
:
1154 ret
= fbcon_set_con2fb_map_ioctl(argp
);
1159 ret
= fb_blank(info
, arg
);
1160 /* might again call into fb_blank */
1161 fbcon_fb_blanked(info
, arg
);
1162 unlock_fb_info(info
);
1169 ret
= fb
->fb_ioctl(info
, cmd
, arg
);
1172 unlock_fb_info(info
);
1177 static long fb_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1179 struct fb_info
*info
= file_fb_info(file
);
1183 return do_fb_ioctl(info
, cmd
, arg
);
1186 #ifdef CONFIG_COMPAT
1187 struct fb_fix_screeninfo32
{
1189 compat_caddr_t smem_start
;
1198 compat_caddr_t mmio_start
;
1208 compat_caddr_t green
;
1209 compat_caddr_t blue
;
1210 compat_caddr_t transp
;
1213 static int fb_getput_cmap(struct fb_info
*info
, unsigned int cmd
,
1216 struct fb_cmap32 cmap32
;
1217 struct fb_cmap cmap_from
;
1218 struct fb_cmap_user cmap
;
1220 if (copy_from_user(&cmap32
, compat_ptr(arg
), sizeof(cmap32
)))
1223 cmap
= (struct fb_cmap_user
) {
1224 .start
= cmap32
.start
,
1226 .red
= compat_ptr(cmap32
.red
),
1227 .green
= compat_ptr(cmap32
.green
),
1228 .blue
= compat_ptr(cmap32
.blue
),
1229 .transp
= compat_ptr(cmap32
.transp
),
1232 if (cmd
== FBIOPUTCMAP
)
1233 return fb_set_user_cmap(&cmap
, info
);
1236 cmap_from
= info
->cmap
;
1237 unlock_fb_info(info
);
1239 return fb_cmap_to_user(&cmap_from
, &cmap
);
1242 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1243 struct fb_fix_screeninfo32 __user
*fix32
)
1248 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1250 data
= (__u32
) (unsigned long) fix
->smem_start
;
1251 err
|= put_user(data
, &fix32
->smem_start
);
1253 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1254 err
|= put_user(fix
->type
, &fix32
->type
);
1255 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1256 err
|= put_user(fix
->visual
, &fix32
->visual
);
1257 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1258 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1259 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1260 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1262 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1263 err
|= put_user(data
, &fix32
->mmio_start
);
1265 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1266 err
|= put_user(fix
->accel
, &fix32
->accel
);
1267 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1268 sizeof(fix
->reserved
));
1275 static int fb_get_fscreeninfo(struct fb_info
*info
, unsigned int cmd
,
1278 struct fb_fix_screeninfo fix
;
1282 if (info
->flags
& FBINFO_HIDE_SMEM_START
)
1284 unlock_fb_info(info
);
1285 return do_fscreeninfo_to_user(&fix
, compat_ptr(arg
));
1288 static long fb_compat_ioctl(struct file
*file
, unsigned int cmd
,
1291 struct fb_info
*info
= file_fb_info(file
);
1292 const struct fb_ops
*fb
;
1293 long ret
= -ENOIOCTLCMD
;
1299 case FBIOGET_VSCREENINFO
:
1300 case FBIOPUT_VSCREENINFO
:
1301 case FBIOPAN_DISPLAY
:
1302 case FBIOGET_CON2FBMAP
:
1303 case FBIOPUT_CON2FBMAP
:
1304 arg
= (unsigned long) compat_ptr(arg
);
1307 ret
= do_fb_ioctl(info
, cmd
, arg
);
1310 case FBIOGET_FSCREENINFO
:
1311 ret
= fb_get_fscreeninfo(info
, cmd
, arg
);
1316 ret
= fb_getput_cmap(info
, cmd
, arg
);
1320 if (fb
->fb_compat_ioctl
)
1321 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1329 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1331 struct fb_info
*info
= file_fb_info(file
);
1332 int (*fb_mmap_fn
)(struct fb_info
*info
, struct vm_area_struct
*vma
);
1333 unsigned long mmio_pgoff
;
1334 unsigned long start
;
1339 mutex_lock(&info
->mm_lock
);
1341 fb_mmap_fn
= info
->fbops
->fb_mmap
;
1343 #if IS_ENABLED(CONFIG_FB_DEFERRED_IO)
1345 fb_mmap_fn
= fb_deferred_io_mmap
;
1352 * The framebuffer needs to be accessed decrypted, be sure
1353 * SME protection is removed ahead of the call
1355 vma
->vm_page_prot
= pgprot_decrypted(vma
->vm_page_prot
);
1356 res
= fb_mmap_fn(info
, vma
);
1357 mutex_unlock(&info
->mm_lock
);
1362 * Ugh. This can be either the frame buffer mapping, or
1363 * if pgoff points past it, the mmio mapping.
1365 start
= info
->fix
.smem_start
;
1366 len
= info
->fix
.smem_len
;
1367 mmio_pgoff
= PAGE_ALIGN((start
& ~PAGE_MASK
) + len
) >> PAGE_SHIFT
;
1368 if (vma
->vm_pgoff
>= mmio_pgoff
) {
1369 if (info
->var
.accel_flags
) {
1370 mutex_unlock(&info
->mm_lock
);
1374 vma
->vm_pgoff
-= mmio_pgoff
;
1375 start
= info
->fix
.mmio_start
;
1376 len
= info
->fix
.mmio_len
;
1378 mutex_unlock(&info
->mm_lock
);
1380 vma
->vm_page_prot
= vm_get_page_prot(vma
->vm_flags
);
1381 fb_pgprotect(file
, vma
, start
);
1383 return vm_iomap_memory(vma
, start
, len
);
1387 fb_open(struct inode
*inode
, struct file
*file
)
1388 __acquires(&info
->lock
)
1389 __releases(&info
->lock
)
1391 int fbidx
= iminor(inode
);
1392 struct fb_info
*info
;
1395 info
= get_fb_info(fbidx
);
1397 request_module("fb%d", fbidx
);
1398 info
= get_fb_info(fbidx
);
1403 return PTR_ERR(info
);
1406 if (!try_module_get(info
->fbops
->owner
)) {
1410 file
->private_data
= info
;
1411 if (info
->fbops
->fb_open
) {
1412 res
= info
->fbops
->fb_open(info
,1);
1414 module_put(info
->fbops
->owner
);
1416 #ifdef CONFIG_FB_DEFERRED_IO
1418 fb_deferred_io_open(info
, inode
, file
);
1421 unlock_fb_info(info
);
1428 fb_release(struct inode
*inode
, struct file
*file
)
1429 __acquires(&info
->lock
)
1430 __releases(&info
->lock
)
1432 struct fb_info
* const info
= file
->private_data
;
1435 if (info
->fbops
->fb_release
)
1436 info
->fbops
->fb_release(info
,1);
1437 module_put(info
->fbops
->owner
);
1438 unlock_fb_info(info
);
1443 #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1444 unsigned long get_fb_unmapped_area(struct file
*filp
,
1445 unsigned long addr
, unsigned long len
,
1446 unsigned long pgoff
, unsigned long flags
)
1448 struct fb_info
* const info
= filp
->private_data
;
1449 unsigned long fb_size
= PAGE_ALIGN(info
->fix
.smem_len
);
1451 if (pgoff
> fb_size
|| len
> fb_size
- pgoff
)
1454 return (unsigned long)info
->screen_base
+ pgoff
;
1458 static const struct file_operations fb_fops
= {
1459 .owner
= THIS_MODULE
,
1462 .unlocked_ioctl
= fb_ioctl
,
1463 #ifdef CONFIG_COMPAT
1464 .compat_ioctl
= fb_compat_ioctl
,
1468 .release
= fb_release
,
1469 #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1470 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1471 !defined(CONFIG_MMU))
1472 .get_unmapped_area
= get_fb_unmapped_area
,
1474 #ifdef CONFIG_FB_DEFERRED_IO
1475 .fsync
= fb_deferred_io_fsync
,
1477 .llseek
= default_llseek
,
1480 struct class *fb_class
;
1481 EXPORT_SYMBOL(fb_class
);
1483 static int fb_check_foreignness(struct fb_info
*fi
)
1485 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1487 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1490 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1492 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1493 #endif /* __BIG_ENDIAN */
1495 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1496 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1497 "support this framebuffer\n", fi
->fix
.id
);
1499 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1500 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1501 "support this framebuffer\n", fi
->fix
.id
);
1508 static bool apertures_overlap(struct aperture
*gen
, struct aperture
*hw
)
1510 /* is the generic aperture base the same as the HW one */
1511 if (gen
->base
== hw
->base
)
1513 /* is the generic aperture base inside the hw base->hw base+size */
1514 if (gen
->base
> hw
->base
&& gen
->base
< hw
->base
+ hw
->size
)
1519 static bool fb_do_apertures_overlap(struct apertures_struct
*gena
,
1520 struct apertures_struct
*hwa
)
1526 for (i
= 0; i
< hwa
->count
; ++i
) {
1527 struct aperture
*h
= &hwa
->ranges
[i
];
1528 for (j
= 0; j
< gena
->count
; ++j
) {
1529 struct aperture
*g
= &gena
->ranges
[j
];
1530 printk(KERN_DEBUG
"checking generic (%llx %llx) vs hw (%llx %llx)\n",
1531 (unsigned long long)g
->base
,
1532 (unsigned long long)g
->size
,
1533 (unsigned long long)h
->base
,
1534 (unsigned long long)h
->size
);
1535 if (apertures_overlap(g
, h
))
1543 static void do_unregister_framebuffer(struct fb_info
*fb_info
);
1545 #define VGA_FB_PHYS 0xA0000
1546 static void do_remove_conflicting_framebuffers(struct apertures_struct
*a
,
1547 const char *name
, bool primary
)
1551 /* check all firmware fbs and kick off if the base addr overlaps */
1552 for_each_registered_fb(i
) {
1553 struct apertures_struct
*gen_aper
;
1555 if (!(registered_fb
[i
]->flags
& FBINFO_MISC_FIRMWARE
))
1558 gen_aper
= registered_fb
[i
]->apertures
;
1559 if (fb_do_apertures_overlap(gen_aper
, a
) ||
1560 (primary
&& gen_aper
&& gen_aper
->count
&&
1561 gen_aper
->ranges
[0].base
== VGA_FB_PHYS
)) {
1563 printk(KERN_INFO
"fb%d: switching to %s from %s\n",
1564 i
, name
, registered_fb
[i
]->fix
.id
);
1565 do_unregister_framebuffer(registered_fb
[i
]);
1570 static bool lockless_register_fb
;
1571 module_param_named_unsafe(lockless_register_fb
, lockless_register_fb
, bool, 0400);
1572 MODULE_PARM_DESC(lockless_register_fb
,
1573 "Lockless framebuffer registration for debugging [default=off]");
1575 static int do_register_framebuffer(struct fb_info
*fb_info
)
1578 struct fb_videomode mode
;
1580 if (fb_check_foreignness(fb_info
))
1583 do_remove_conflicting_framebuffers(fb_info
->apertures
,
1585 fb_is_primary_device(fb_info
));
1587 if (num_registered_fb
== FB_MAX
)
1590 num_registered_fb
++;
1591 for (i
= 0 ; i
< FB_MAX
; i
++)
1592 if (!registered_fb
[i
])
1595 refcount_set(&fb_info
->count
, 1);
1596 mutex_init(&fb_info
->lock
);
1597 mutex_init(&fb_info
->mm_lock
);
1599 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1600 MKDEV(FB_MAJOR
, i
), NULL
, "fb%d", i
);
1601 if (IS_ERR(fb_info
->dev
)) {
1603 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1604 fb_info
->dev
= NULL
;
1606 fb_init_device(fb_info
);
1608 if (fb_info
->pixmap
.addr
== NULL
) {
1609 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1610 if (fb_info
->pixmap
.addr
) {
1611 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1612 fb_info
->pixmap
.buf_align
= 1;
1613 fb_info
->pixmap
.scan_align
= 1;
1614 fb_info
->pixmap
.access_align
= 32;
1615 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1618 fb_info
->pixmap
.offset
= 0;
1620 if (!fb_info
->pixmap
.blit_x
)
1621 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1623 if (!fb_info
->pixmap
.blit_y
)
1624 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1626 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1627 INIT_LIST_HEAD(&fb_info
->modelist
);
1629 if (fb_info
->skip_vt_switch
)
1630 pm_vt_switch_required(fb_info
->dev
, false);
1632 pm_vt_switch_required(fb_info
->dev
, true);
1634 fb_var_to_videomode(&mode
, &fb_info
->var
);
1635 fb_add_videomode(&mode
, &fb_info
->modelist
);
1636 registered_fb
[i
] = fb_info
;
1638 #ifdef CONFIG_GUMSTIX_AM200EPD
1640 struct fb_event event
;
1641 event
.info
= fb_info
;
1642 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1646 if (!lockless_register_fb
)
1649 atomic_inc(&ignore_console_lock_warning
);
1650 lock_fb_info(fb_info
);
1651 ret
= fbcon_fb_registered(fb_info
);
1652 unlock_fb_info(fb_info
);
1654 if (!lockless_register_fb
)
1657 atomic_dec(&ignore_console_lock_warning
);
1661 static void unbind_console(struct fb_info
*fb_info
)
1663 int i
= fb_info
->node
;
1665 if (WARN_ON(i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
))
1669 lock_fb_info(fb_info
);
1670 fbcon_fb_unbind(fb_info
);
1671 unlock_fb_info(fb_info
);
1675 static void unlink_framebuffer(struct fb_info
*fb_info
)
1680 if (WARN_ON(i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
))
1686 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1688 pm_vt_switch_unregister(fb_info
->dev
);
1690 unbind_console(fb_info
);
1692 fb_info
->dev
= NULL
;
1695 static void do_unregister_framebuffer(struct fb_info
*fb_info
)
1697 unlink_framebuffer(fb_info
);
1698 if (fb_info
->pixmap
.addr
&&
1699 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1700 kfree(fb_info
->pixmap
.addr
);
1701 fb_destroy_modelist(&fb_info
->modelist
);
1702 registered_fb
[fb_info
->node
] = NULL
;
1703 num_registered_fb
--;
1704 fb_cleanup_device(fb_info
);
1705 #ifdef CONFIG_GUMSTIX_AM200EPD
1707 struct fb_event event
;
1708 event
.info
= fb_info
;
1709 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1713 fbcon_fb_unregistered(fb_info
);
1716 /* this may free fb info */
1717 put_fb_info(fb_info
);
1721 * remove_conflicting_framebuffers - remove firmware-configured framebuffers
1722 * @a: memory range, users of which are to be removed
1723 * @name: requesting driver name
1724 * @primary: also kick vga16fb if present
1726 * This function removes framebuffer devices (initialized by firmware/bootloader)
1727 * which use memory range described by @a. If @a is NULL all such devices are
1730 int remove_conflicting_framebuffers(struct apertures_struct
*a
,
1731 const char *name
, bool primary
)
1733 bool do_free
= false;
1736 a
= alloc_apertures(1);
1740 a
->ranges
[0].base
= 0;
1741 a
->ranges
[0].size
= ~0;
1745 mutex_lock(®istration_lock
);
1746 do_remove_conflicting_framebuffers(a
, name
, primary
);
1747 mutex_unlock(®istration_lock
);
1754 EXPORT_SYMBOL(remove_conflicting_framebuffers
);
1757 * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices
1759 * @name: requesting driver name
1761 * This function removes framebuffer devices (eg. initialized by firmware)
1762 * using memory range configured for any of @pdev's memory bars.
1764 * The function assumes that PCI device with shadowed ROM drives a primary
1765 * display and so kicks out vga16fb.
1767 int remove_conflicting_pci_framebuffers(struct pci_dev
*pdev
, const char *name
)
1769 struct apertures_struct
*ap
;
1770 bool primary
= false;
1773 for (idx
= 0, bar
= 0; bar
< PCI_STD_NUM_BARS
; bar
++) {
1774 if (!(pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
))
1779 ap
= alloc_apertures(idx
);
1783 for (idx
= 0, bar
= 0; bar
< PCI_STD_NUM_BARS
; bar
++) {
1784 if (!(pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
))
1786 ap
->ranges
[idx
].base
= pci_resource_start(pdev
, bar
);
1787 ap
->ranges
[idx
].size
= pci_resource_len(pdev
, bar
);
1788 pci_dbg(pdev
, "%s: bar %d: 0x%lx -> 0x%lx\n", __func__
, bar
,
1789 (unsigned long)pci_resource_start(pdev
, bar
),
1790 (unsigned long)pci_resource_end(pdev
, bar
));
1795 primary
= pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
1796 IORESOURCE_ROM_SHADOW
;
1798 err
= remove_conflicting_framebuffers(ap
, name
, primary
);
1802 EXPORT_SYMBOL(remove_conflicting_pci_framebuffers
);
1805 * register_framebuffer - registers a frame buffer device
1806 * @fb_info: frame buffer info structure
1808 * Registers a frame buffer device @fb_info.
1810 * Returns negative errno on error, or zero for success.
1814 register_framebuffer(struct fb_info
*fb_info
)
1818 mutex_lock(®istration_lock
);
1819 ret
= do_register_framebuffer(fb_info
);
1820 mutex_unlock(®istration_lock
);
1824 EXPORT_SYMBOL(register_framebuffer
);
1827 * unregister_framebuffer - releases a frame buffer device
1828 * @fb_info: frame buffer info structure
1830 * Unregisters a frame buffer device @fb_info.
1832 * Returns negative errno on error, or zero for success.
1834 * This function will also notify the framebuffer console
1835 * to release the driver.
1837 * This is meant to be called within a driver's module_exit()
1838 * function. If this is called outside module_exit(), ensure
1839 * that the driver implements fb_open() and fb_release() to
1840 * check that no processes are using the device.
1843 unregister_framebuffer(struct fb_info
*fb_info
)
1845 mutex_lock(®istration_lock
);
1846 do_unregister_framebuffer(fb_info
);
1847 mutex_unlock(®istration_lock
);
1849 EXPORT_SYMBOL(unregister_framebuffer
);
1852 * fb_set_suspend - low level driver signals suspend
1853 * @info: framebuffer affected
1854 * @state: 0 = resuming, !=0 = suspending
1856 * This is meant to be used by low level drivers to
1857 * signal suspend/resume to the core & clients.
1858 * It must be called with the console semaphore held
1860 void fb_set_suspend(struct fb_info
*info
, int state
)
1862 WARN_CONSOLE_UNLOCKED();
1865 fbcon_suspended(info
);
1866 info
->state
= FBINFO_STATE_SUSPENDED
;
1868 info
->state
= FBINFO_STATE_RUNNING
;
1869 fbcon_resumed(info
);
1872 EXPORT_SYMBOL(fb_set_suspend
);
1875 * fbmem_init - init frame buffer subsystem
1877 * Initialize the frame buffer subsystem.
1879 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1888 if (!proc_create_seq("fb", 0, NULL
, &proc_fb_seq_ops
))
1891 ret
= register_chrdev(FB_MAJOR
, "fb", &fb_fops
);
1893 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1897 fb_class
= class_create(THIS_MODULE
, "graphics");
1898 if (IS_ERR(fb_class
)) {
1899 ret
= PTR_ERR(fb_class
);
1900 pr_warn("Unable to create fb class; errno = %d\n", ret
);
1910 unregister_chrdev(FB_MAJOR
, "fb");
1912 remove_proc_entry("fb", NULL
);
1917 module_init(fbmem_init
);
1923 remove_proc_entry("fb", NULL
);
1924 class_destroy(fb_class
);
1925 unregister_chrdev(FB_MAJOR
, "fb");
1928 module_exit(fbmem_exit
);
1929 MODULE_LICENSE("GPL");
1930 MODULE_DESCRIPTION("Framebuffer base");
1932 subsys_initcall(fbmem_init
);
1935 int fb_new_modelist(struct fb_info
*info
)
1937 struct fb_var_screeninfo var
= info
->var
;
1938 struct list_head
*pos
, *n
;
1939 struct fb_modelist
*modelist
;
1940 struct fb_videomode
*m
, mode
;
1943 list_for_each_safe(pos
, n
, &info
->modelist
) {
1944 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1945 m
= &modelist
->mode
;
1946 fb_videomode_to_var(&var
, m
);
1947 var
.activate
= FB_ACTIVATE_TEST
;
1948 err
= fb_set_var(info
, &var
);
1949 fb_var_to_videomode(&mode
, &var
);
1950 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1956 if (list_empty(&info
->modelist
))
1959 fbcon_new_modelist(info
);
1964 MODULE_LICENSE("GPL");