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
;
57 EXPORT_SYMBOL(fb_center_logo
);
59 static struct fb_info
*get_fb_info(unsigned int idx
)
61 struct fb_info
*fb_info
;
64 return ERR_PTR(-ENODEV
);
66 mutex_lock(®istration_lock
);
67 fb_info
= registered_fb
[idx
];
69 atomic_inc(&fb_info
->count
);
70 mutex_unlock(®istration_lock
);
75 static void put_fb_info(struct fb_info
*fb_info
)
77 if (!atomic_dec_and_test(&fb_info
->count
))
79 if (fb_info
->fbops
->fb_destroy
)
80 fb_info
->fbops
->fb_destroy(fb_info
);
87 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
88 struct fb_fix_screeninfo
*fix
)
92 if (fix
->visual
== FB_VISUAL_MONO01
||
93 fix
->visual
== FB_VISUAL_MONO10
)
96 if (var
->green
.length
== var
->blue
.length
&&
97 var
->green
.length
== var
->red
.length
&&
98 var
->green
.offset
== var
->blue
.offset
&&
99 var
->green
.offset
== var
->red
.offset
)
100 depth
= var
->green
.length
;
102 depth
= var
->green
.length
+ var
->red
.length
+
108 EXPORT_SYMBOL(fb_get_color_depth
);
111 * Data padding functions.
113 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
115 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
117 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
119 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
120 u32 shift_high
, u32 shift_low
, u32 mod
)
122 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
125 for (i
= height
; i
--; ) {
126 for (j
= 0; j
< idx
; j
++) {
129 tmp
|= *src
>> shift_low
;
131 tmp
= *src
<< shift_high
;
137 tmp
|= *src
>> shift_low
;
139 if (shift_high
< mod
) {
140 tmp
= *src
<< shift_high
;
147 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
150 * we need to lock this section since fb_cursor
151 * may use fb_imageblit()
153 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
155 u32 align
= buf
->buf_align
- 1, offset
;
156 char *addr
= buf
->addr
;
158 /* If IO mapped, we need to sync before access, no sharing of
161 if (buf
->flags
& FB_PIXMAP_IO
) {
162 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
163 info
->fbops
->fb_sync(info
);
167 /* See if we fit in the remaining pixmap space */
168 offset
= buf
->offset
+ align
;
170 if (offset
+ size
> buf
->size
) {
171 /* We do not fit. In order to be able to re-use the buffer,
172 * we must ensure no asynchronous DMA'ing or whatever operation
173 * is in progress, we sync for that.
175 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
176 info
->fbops
->fb_sync(info
);
179 buf
->offset
= offset
+ size
;
184 EXPORT_SYMBOL(fb_get_buffer_offset
);
188 static inline unsigned safe_shift(unsigned d
, int n
)
190 return n
< 0 ? d
>> -n
: d
<< n
;
193 static void fb_set_logocmap(struct fb_info
*info
,
194 const struct linux_logo
*logo
)
196 struct fb_cmap palette_cmap
;
197 u16 palette_green
[16];
198 u16 palette_blue
[16];
201 const unsigned char *clut
= logo
->clut
;
203 palette_cmap
.start
= 0;
204 palette_cmap
.len
= 16;
205 palette_cmap
.red
= palette_red
;
206 palette_cmap
.green
= palette_green
;
207 palette_cmap
.blue
= palette_blue
;
208 palette_cmap
.transp
= NULL
;
210 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
211 n
= logo
->clutsize
- i
;
212 /* palette_cmap provides space for only 16 colors at once */
215 palette_cmap
.start
= 32 + i
;
216 palette_cmap
.len
= n
;
217 for (j
= 0; j
< n
; ++j
) {
218 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
219 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
220 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
223 fb_set_cmap(&palette_cmap
, info
);
227 static void fb_set_logo_truepalette(struct fb_info
*info
,
228 const struct linux_logo
*logo
,
231 static const unsigned char mask
[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
232 unsigned char redmask
, greenmask
, bluemask
;
233 int redshift
, greenshift
, blueshift
;
235 const unsigned char *clut
= logo
->clut
;
238 * We have to create a temporary palette since console palette is only
241 /* Bug: Doesn't obey msb_right ... (who needs that?) */
242 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
243 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
244 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
245 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
246 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
247 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
249 for ( i
= 0; i
< logo
->clutsize
; i
++) {
250 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
251 safe_shift((clut
[1] & greenmask
), greenshift
) |
252 safe_shift((clut
[2] & bluemask
), blueshift
));
257 static void fb_set_logo_directpalette(struct fb_info
*info
,
258 const struct linux_logo
*logo
,
261 int redshift
, greenshift
, blueshift
;
264 redshift
= info
->var
.red
.offset
;
265 greenshift
= info
->var
.green
.offset
;
266 blueshift
= info
->var
.blue
.offset
;
268 for (i
= 32; i
< 32 + logo
->clutsize
; i
++)
269 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
272 static void fb_set_logo(struct fb_info
*info
,
273 const struct linux_logo
*logo
, u8
*dst
,
277 const u8
*src
= logo
->data
;
278 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
281 switch (fb_get_color_depth(&info
->var
, &info
->fix
)) {
293 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
294 info
->fix
.visual
== FB_VISUAL_MONO10
)
295 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
299 for (i
= 0; i
< logo
->height
; i
++)
300 for (j
= 0; j
< logo
->width
; src
++) {
303 if (j
< logo
->width
) {
304 *dst
++ = *src
& 0x0f;
310 for (i
= 0; i
< logo
->height
; i
++) {
311 for (j
= 0; j
< logo
->width
; src
++) {
313 for (k
= 7; k
>= 0 && j
< logo
->width
; k
--) {
314 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
324 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
325 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
326 * the visual format and color depth of the framebuffer, the DAC, the
327 * pseudo_palette, and the logo data will be adjusted accordingly.
329 * Case 1 - linux_logo_clut224:
330 * Color exceeds the number of console colors (16), thus we set the hardware DAC
331 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
333 * For visuals that require color info from the pseudo_palette, we also construct
334 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
337 * Case 2 - linux_logo_vga16:
338 * The number of colors just matches the console colors, thus there is no need
339 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
340 * each byte contains color information for two pixels (upper and lower nibble).
341 * To be consistent with fb_imageblit() usage, we therefore separate the two
342 * nibbles into separate bytes. The "depth" flag will be set to 4.
344 * Case 3 - linux_logo_mono:
345 * This is similar with Case 2. Each byte contains information for 8 pixels.
346 * We isolate each bit and expand each into a byte. The "depth" flag will
349 static struct logo_data
{
351 int needs_directpalette
;
352 int needs_truepalette
;
354 const struct linux_logo
*logo
;
355 } fb_logo __read_mostly
;
357 static void fb_rotate_logo_ud(const u8
*in
, u8
*out
, u32 width
, u32 height
)
359 u32 size
= width
* height
, i
;
363 for (i
= size
; i
--; )
367 static void fb_rotate_logo_cw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
369 int i
, j
, h
= height
- 1;
371 for (i
= 0; i
< height
; i
++)
372 for (j
= 0; j
< width
; j
++)
373 out
[height
* j
+ h
- i
] = *in
++;
376 static void fb_rotate_logo_ccw(const u8
*in
, u8
*out
, u32 width
, u32 height
)
378 int i
, j
, w
= width
- 1;
380 for (i
= 0; i
< height
; i
++)
381 for (j
= 0; j
< width
; j
++)
382 out
[height
* (w
- j
) + i
] = *in
++;
385 static void fb_rotate_logo(struct fb_info
*info
, u8
*dst
,
386 struct fb_image
*image
, int rotate
)
390 if (rotate
== FB_ROTATE_UD
) {
391 fb_rotate_logo_ud(image
->data
, dst
, image
->width
,
393 image
->dx
= info
->var
.xres
- image
->width
- image
->dx
;
394 image
->dy
= info
->var
.yres
- image
->height
- image
->dy
;
395 } else if (rotate
== FB_ROTATE_CW
) {
396 fb_rotate_logo_cw(image
->data
, dst
, image
->width
,
399 image
->width
= image
->height
;
402 image
->dy
= image
->dx
;
403 image
->dx
= info
->var
.xres
- image
->width
- tmp
;
404 } else if (rotate
== FB_ROTATE_CCW
) {
405 fb_rotate_logo_ccw(image
->data
, dst
, image
->width
,
408 image
->width
= image
->height
;
411 image
->dx
= image
->dy
;
412 image
->dy
= info
->var
.yres
- image
->height
- tmp
;
418 static void fb_do_show_logo(struct fb_info
*info
, struct fb_image
*image
,
419 int rotate
, unsigned int num
)
423 if (image
->width
> info
->var
.xres
|| image
->height
> info
->var
.yres
)
426 if (rotate
== FB_ROTATE_UR
) {
428 x
< num
&& image
->dx
+ image
->width
<= info
->var
.xres
;
430 info
->fbops
->fb_imageblit(info
, image
);
431 image
->dx
+= image
->width
+ 8;
433 } else if (rotate
== FB_ROTATE_UD
) {
436 for (x
= 0; x
< num
&& image
->dx
<= dx
; 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
) {
450 for (x
= 0; x
< num
&& image
->dy
<= dy
; x
++) {
451 info
->fbops
->fb_imageblit(info
, image
);
452 image
->dy
-= image
->height
+ 8;
457 static int fb_show_logo_line(struct fb_info
*info
, int rotate
,
458 const struct linux_logo
*logo
, int y
,
461 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
462 unsigned char *logo_new
= NULL
, *logo_rotate
= NULL
;
463 struct fb_image image
;
465 /* Return if the frame buffer is not mapped or suspended */
466 if (logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
||
471 image
.data
= logo
->data
;
473 if (fb_logo
.needs_cmapreset
)
474 fb_set_logocmap(info
, logo
);
476 if (fb_logo
.needs_truepalette
||
477 fb_logo
.needs_directpalette
) {
478 palette
= kmalloc(256 * 4, GFP_KERNEL
);
482 if (fb_logo
.needs_truepalette
)
483 fb_set_logo_truepalette(info
, logo
, palette
);
485 fb_set_logo_directpalette(info
, logo
, palette
);
487 saved_pseudo_palette
= info
->pseudo_palette
;
488 info
->pseudo_palette
= palette
;
491 if (fb_logo
.depth
<= 4) {
492 logo_new
= kmalloc_array(logo
->width
, logo
->height
,
494 if (logo_new
== NULL
) {
496 if (saved_pseudo_palette
)
497 info
->pseudo_palette
= saved_pseudo_palette
;
500 image
.data
= logo_new
;
501 fb_set_logo(info
, logo
, logo_new
, fb_logo
.depth
);
504 if (fb_center_logo
) {
505 int xres
= info
->var
.xres
;
506 int yres
= info
->var
.yres
;
508 if (rotate
== FB_ROTATE_CW
|| rotate
== FB_ROTATE_CCW
) {
509 xres
= info
->var
.yres
;
510 yres
= info
->var
.xres
;
513 while (n
&& (n
* (logo
->width
+ 8) - 8 > xres
))
515 image
.dx
= (xres
- n
* (logo
->width
+ 8) - 8) / 2;
516 image
.dy
= y
?: (yres
- logo
->height
) / 2;
522 image
.width
= logo
->width
;
523 image
.height
= logo
->height
;
526 logo_rotate
= kmalloc_array(logo
->width
, logo
->height
,
529 fb_rotate_logo(info
, logo_rotate
, &image
, rotate
);
532 fb_do_show_logo(info
, &image
, rotate
, n
);
535 if (saved_pseudo_palette
!= NULL
)
536 info
->pseudo_palette
= saved_pseudo_palette
;
539 return image
.dy
+ logo
->height
;
543 #ifdef CONFIG_FB_LOGO_EXTRA
545 #define FB_LOGO_EX_NUM_MAX 10
546 static struct logo_data_extra
{
547 const struct linux_logo
*logo
;
549 } fb_logo_ex
[FB_LOGO_EX_NUM_MAX
];
550 static unsigned int fb_logo_ex_num
;
552 void fb_append_extra_logo(const struct linux_logo
*logo
, unsigned int n
)
554 if (!n
|| fb_logo_ex_num
== FB_LOGO_EX_NUM_MAX
)
557 fb_logo_ex
[fb_logo_ex_num
].logo
= logo
;
558 fb_logo_ex
[fb_logo_ex_num
].n
= n
;
562 static int fb_prepare_extra_logos(struct fb_info
*info
, unsigned int height
,
567 /* FIXME: logo_ex supports only truecolor fb. */
568 if (info
->fix
.visual
!= FB_VISUAL_TRUECOLOR
)
571 for (i
= 0; i
< fb_logo_ex_num
; i
++) {
572 if (fb_logo_ex
[i
].logo
->type
!= fb_logo
.logo
->type
) {
573 fb_logo_ex
[i
].logo
= NULL
;
576 height
+= fb_logo_ex
[i
].logo
->height
;
578 height
-= fb_logo_ex
[i
].logo
->height
;
586 static int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
590 for (i
= 0; i
< fb_logo_ex_num
; i
++)
591 y
= fb_show_logo_line(info
, rotate
,
592 fb_logo_ex
[i
].logo
, y
, fb_logo_ex
[i
].n
);
597 #else /* !CONFIG_FB_LOGO_EXTRA */
599 static inline int fb_prepare_extra_logos(struct fb_info
*info
,
606 static inline int fb_show_extra_logos(struct fb_info
*info
, int y
, int rotate
)
611 #endif /* CONFIG_FB_LOGO_EXTRA */
614 int fb_prepare_logo(struct fb_info
*info
, int rotate
)
616 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
620 memset(&fb_logo
, 0, sizeof(struct logo_data
));
622 if (info
->flags
& FBINFO_MISC_TILEBLITTING
||
626 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
627 depth
= info
->var
.blue
.length
;
628 if (info
->var
.red
.length
< depth
)
629 depth
= info
->var
.red
.length
;
630 if (info
->var
.green
.length
< depth
)
631 depth
= info
->var
.green
.length
;
634 if (info
->fix
.visual
== FB_VISUAL_STATIC_PSEUDOCOLOR
&& depth
> 4) {
635 /* assume console colormap */
639 /* Return if no suitable logo was found */
640 fb_logo
.logo
= fb_find_logo(depth
);
646 if (rotate
== FB_ROTATE_UR
|| rotate
== FB_ROTATE_UD
)
647 yres
= info
->var
.yres
;
649 yres
= info
->var
.xres
;
651 if (fb_logo
.logo
->height
> yres
) {
656 /* What depth we asked for might be different from what we get */
657 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
659 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
665 if (fb_logo
.depth
> 4 && depth
> 4) {
666 switch (info
->fix
.visual
) {
667 case FB_VISUAL_TRUECOLOR
:
668 fb_logo
.needs_truepalette
= 1;
670 case FB_VISUAL_DIRECTCOLOR
:
671 fb_logo
.needs_directpalette
= 1;
672 fb_logo
.needs_cmapreset
= 1;
674 case FB_VISUAL_PSEUDOCOLOR
:
675 fb_logo
.needs_cmapreset
= 1;
680 height
= fb_logo
.logo
->height
;
682 height
+= (yres
- fb_logo
.logo
->height
) / 2;
684 return fb_prepare_extra_logos(info
, height
, yres
);
687 int fb_show_logo(struct fb_info
*info
, int rotate
)
691 y
= fb_show_logo_line(info
, rotate
, fb_logo
.logo
, 0,
693 y
= fb_show_extra_logos(info
, y
, rotate
);
698 int fb_prepare_logo(struct fb_info
*info
, int rotate
) { return 0; }
699 int fb_show_logo(struct fb_info
*info
, int rotate
) { return 0; }
700 #endif /* CONFIG_LOGO */
701 EXPORT_SYMBOL(fb_prepare_logo
);
702 EXPORT_SYMBOL(fb_show_logo
);
704 static void *fb_seq_start(struct seq_file
*m
, loff_t
*pos
)
706 mutex_lock(®istration_lock
);
707 return (*pos
< FB_MAX
) ? pos
: NULL
;
710 static void *fb_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
713 return (*pos
< FB_MAX
) ? pos
: NULL
;
716 static void fb_seq_stop(struct seq_file
*m
, void *v
)
718 mutex_unlock(®istration_lock
);
721 static int fb_seq_show(struct seq_file
*m
, void *v
)
723 int i
= *(loff_t
*)v
;
724 struct fb_info
*fi
= registered_fb
[i
];
727 seq_printf(m
, "%d %s\n", fi
->node
, fi
->fix
.id
);
731 static const struct seq_operations proc_fb_seq_ops
= {
732 .start
= fb_seq_start
,
739 * We hold a reference to the fb_info in file->private_data,
740 * but if the current registered fb has changed, we don't
741 * actually want to use it.
743 * So look up the fb_info using the inode minor number,
744 * and just verify it against the reference we have.
746 static struct fb_info
*file_fb_info(struct file
*file
)
748 struct inode
*inode
= file_inode(file
);
749 int fbidx
= iminor(inode
);
750 struct fb_info
*info
= registered_fb
[fbidx
];
752 if (info
!= file
->private_data
)
758 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
760 unsigned long p
= *ppos
;
761 struct fb_info
*info
= file_fb_info(file
);
764 int c
, cnt
= 0, err
= 0;
765 unsigned long total_size
;
767 if (!info
|| ! info
->screen_base
)
770 if (info
->state
!= FBINFO_STATE_RUNNING
)
773 if (info
->fbops
->fb_read
)
774 return info
->fbops
->fb_read(info
, buf
, count
, ppos
);
776 total_size
= info
->screen_size
;
779 total_size
= info
->fix
.smem_len
;
784 if (count
>= total_size
)
787 if (count
+ p
> total_size
)
788 count
= total_size
- p
;
790 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
795 src
= (u8 __iomem
*) (info
->screen_base
+ p
);
797 if (info
->fbops
->fb_sync
)
798 info
->fbops
->fb_sync(info
);
801 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
803 fb_memcpy_fromfb(dst
, src
, c
);
807 if (copy_to_user(buf
, buffer
, c
)) {
819 return (err
) ? err
: cnt
;
823 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
825 unsigned long p
= *ppos
;
826 struct fb_info
*info
= file_fb_info(file
);
829 int c
, cnt
= 0, err
= 0;
830 unsigned long total_size
;
832 if (!info
|| !info
->screen_base
)
835 if (info
->state
!= FBINFO_STATE_RUNNING
)
838 if (info
->fbops
->fb_write
)
839 return info
->fbops
->fb_write(info
, buf
, count
, ppos
);
841 total_size
= info
->screen_size
;
844 total_size
= info
->fix
.smem_len
;
849 if (count
> total_size
) {
854 if (count
+ p
> total_size
) {
858 count
= total_size
- p
;
861 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
866 dst
= (u8 __iomem
*) (info
->screen_base
+ p
);
868 if (info
->fbops
->fb_sync
)
869 info
->fbops
->fb_sync(info
);
872 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
875 if (copy_from_user(src
, buf
, c
)) {
880 fb_memcpy_tofb(dst
, src
, c
);
891 return (cnt
) ? cnt
: err
;
895 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
897 struct fb_fix_screeninfo
*fix
= &info
->fix
;
898 unsigned int yres
= info
->var
.yres
;
901 if (var
->yoffset
> 0) {
902 if (var
->vmode
& FB_VMODE_YWRAP
) {
903 if (!fix
->ywrapstep
|| (var
->yoffset
% fix
->ywrapstep
))
907 } else if (!fix
->ypanstep
|| (var
->yoffset
% fix
->ypanstep
))
911 if (var
->xoffset
> 0 && (!fix
->xpanstep
||
912 (var
->xoffset
% fix
->xpanstep
)))
915 if (err
|| !info
->fbops
->fb_pan_display
||
916 var
->yoffset
> info
->var
.yres_virtual
- yres
||
917 var
->xoffset
> info
->var
.xres_virtual
- info
->var
.xres
)
920 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
922 info
->var
.xoffset
= var
->xoffset
;
923 info
->var
.yoffset
= var
->yoffset
;
924 if (var
->vmode
& FB_VMODE_YWRAP
)
925 info
->var
.vmode
|= FB_VMODE_YWRAP
;
927 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
930 EXPORT_SYMBOL(fb_pan_display
);
932 static int fb_check_caps(struct fb_info
*info
, struct fb_var_screeninfo
*var
,
935 struct fb_blit_caps caps
, fbcaps
;
938 memset(&caps
, 0, sizeof(caps
));
939 memset(&fbcaps
, 0, sizeof(fbcaps
));
940 caps
.flags
= (activate
& FB_ACTIVATE_ALL
) ? 1 : 0;
941 fbcon_get_requirement(info
, &caps
);
942 info
->fbops
->fb_get_caps(info
, &fbcaps
, var
);
944 if (((fbcaps
.x
^ caps
.x
) & caps
.x
) ||
945 ((fbcaps
.y
^ caps
.y
) & caps
.y
) ||
946 (fbcaps
.len
< caps
.len
))
953 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
955 int flags
= info
->flags
;
958 struct fb_var_screeninfo old_var
;
959 struct fb_videomode mode
;
960 struct fb_event event
;
962 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
963 struct fb_videomode mode1
, mode2
;
965 fb_var_to_videomode(&mode1
, var
);
966 fb_var_to_videomode(&mode2
, &info
->var
);
967 /* make sure we don't delete the videomode of current var */
968 ret
= fb_mode_is_equal(&mode1
, &mode2
);
971 fbcon_mode_deleted(info
, &mode1
);
974 fb_delete_videomode(&mode1
, &info
->modelist
);
977 return ret
? -EINVAL
: 0;
980 if (!(var
->activate
& FB_ACTIVATE_FORCE
) &&
981 !memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
)))
984 activate
= var
->activate
;
986 /* When using FOURCC mode, make sure the red, green, blue and
987 * transp fields are set to 0.
989 if ((info
->fix
.capabilities
& FB_CAP_FOURCC
) &&
990 var
->grayscale
> 1) {
991 if (var
->red
.offset
|| var
->green
.offset
||
992 var
->blue
.offset
|| var
->transp
.offset
||
993 var
->red
.length
|| var
->green
.length
||
994 var
->blue
.length
|| var
->transp
.length
||
995 var
->red
.msb_right
|| var
->green
.msb_right
||
996 var
->blue
.msb_right
|| var
->transp
.msb_right
)
1000 if (!info
->fbops
->fb_check_var
) {
1005 ret
= info
->fbops
->fb_check_var(var
, info
);
1010 if ((var
->activate
& FB_ACTIVATE_MASK
) != FB_ACTIVATE_NOW
)
1013 if (info
->fbops
->fb_get_caps
) {
1014 ret
= fb_check_caps(info
, var
, activate
);
1020 old_var
= info
->var
;
1023 if (info
->fbops
->fb_set_par
) {
1024 ret
= info
->fbops
->fb_set_par(info
);
1027 info
->var
= old_var
;
1028 printk(KERN_WARNING
"detected "
1029 "fb_set_par error, "
1030 "error code: %d\n", ret
);
1035 fb_pan_display(info
, &info
->var
);
1036 fb_set_cmap(&info
->cmap
, info
);
1037 fb_var_to_videomode(&mode
, &info
->var
);
1039 if (info
->modelist
.prev
&& info
->modelist
.next
&&
1040 !list_empty(&info
->modelist
))
1041 ret
= fb_add_videomode(&mode
, &info
->modelist
);
1048 fb_notifier_call_chain(FB_EVENT_MODE_CHANGE
, &event
);
1050 if (flags
& FBINFO_MISC_USEREVENT
)
1051 fbcon_update_vcs(info
, activate
& FB_ACTIVATE_ALL
);
1055 EXPORT_SYMBOL(fb_set_var
);
1058 fb_blank(struct fb_info
*info
, int blank
)
1060 struct fb_event event
;
1063 if (blank
> FB_BLANK_POWERDOWN
)
1064 blank
= FB_BLANK_POWERDOWN
;
1067 event
.data
= &blank
;
1069 if (info
->fbops
->fb_blank
)
1070 ret
= info
->fbops
->fb_blank(blank
, info
);
1073 fb_notifier_call_chain(FB_EVENT_BLANK
, &event
);
1077 EXPORT_SYMBOL(fb_blank
);
1079 static long do_fb_ioctl(struct fb_info
*info
, unsigned int cmd
,
1083 struct fb_var_screeninfo var
;
1084 struct fb_fix_screeninfo fix
;
1085 struct fb_cmap cmap_from
;
1086 struct fb_cmap_user cmap
;
1087 void __user
*argp
= (void __user
*)arg
;
1091 case FBIOGET_VSCREENINFO
:
1094 unlock_fb_info(info
);
1096 ret
= copy_to_user(argp
, &var
, sizeof(var
)) ? -EFAULT
: 0;
1098 case FBIOPUT_VSCREENINFO
:
1099 if (copy_from_user(&var
, argp
, sizeof(var
)))
1103 info
->flags
|= FBINFO_MISC_USEREVENT
;
1104 ret
= fb_set_var(info
, &var
);
1105 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
1106 unlock_fb_info(info
);
1108 if (!ret
&& copy_to_user(argp
, &var
, sizeof(var
)))
1111 case FBIOGET_FSCREENINFO
:
1114 if (info
->flags
& FBINFO_HIDE_SMEM_START
)
1116 unlock_fb_info(info
);
1118 ret
= copy_to_user(argp
, &fix
, sizeof(fix
)) ? -EFAULT
: 0;
1121 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1123 ret
= fb_set_user_cmap(&cmap
, info
);
1126 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
1129 cmap_from
= info
->cmap
;
1130 unlock_fb_info(info
);
1131 ret
= fb_cmap_to_user(&cmap_from
, &cmap
);
1133 case FBIOPAN_DISPLAY
:
1134 if (copy_from_user(&var
, argp
, sizeof(var
)))
1138 ret
= fb_pan_display(info
, &var
);
1139 unlock_fb_info(info
);
1141 if (ret
== 0 && copy_to_user(argp
, &var
, sizeof(var
)))
1147 case FBIOGET_CON2FBMAP
:
1148 ret
= fbcon_get_con2fb_map_ioctl(argp
);
1150 case FBIOPUT_CON2FBMAP
:
1151 ret
= fbcon_set_con2fb_map_ioctl(argp
);
1156 ret
= fb_blank(info
, arg
);
1157 /* might again call into fb_blank */
1158 fbcon_fb_blanked(info
, arg
);
1159 unlock_fb_info(info
);
1166 ret
= fb
->fb_ioctl(info
, cmd
, arg
);
1169 unlock_fb_info(info
);
1174 static long fb_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
1176 struct fb_info
*info
= file_fb_info(file
);
1180 return do_fb_ioctl(info
, cmd
, arg
);
1183 #ifdef CONFIG_COMPAT
1184 struct fb_fix_screeninfo32
{
1186 compat_caddr_t smem_start
;
1195 compat_caddr_t mmio_start
;
1205 compat_caddr_t green
;
1206 compat_caddr_t blue
;
1207 compat_caddr_t transp
;
1210 static int fb_getput_cmap(struct fb_info
*info
, unsigned int cmd
,
1213 struct fb_cmap_user __user
*cmap
;
1214 struct fb_cmap32 __user
*cmap32
;
1218 cmap
= compat_alloc_user_space(sizeof(*cmap
));
1219 cmap32
= compat_ptr(arg
);
1221 if (copy_in_user(&cmap
->start
, &cmap32
->start
, 2 * sizeof(__u32
)))
1224 if (get_user(data
, &cmap32
->red
) ||
1225 put_user(compat_ptr(data
), &cmap
->red
) ||
1226 get_user(data
, &cmap32
->green
) ||
1227 put_user(compat_ptr(data
), &cmap
->green
) ||
1228 get_user(data
, &cmap32
->blue
) ||
1229 put_user(compat_ptr(data
), &cmap
->blue
) ||
1230 get_user(data
, &cmap32
->transp
) ||
1231 put_user(compat_ptr(data
), &cmap
->transp
))
1234 err
= do_fb_ioctl(info
, cmd
, (unsigned long) cmap
);
1237 if (copy_in_user(&cmap32
->start
,
1245 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo
*fix
,
1246 struct fb_fix_screeninfo32 __user
*fix32
)
1251 err
= copy_to_user(&fix32
->id
, &fix
->id
, sizeof(fix32
->id
));
1253 data
= (__u32
) (unsigned long) fix
->smem_start
;
1254 err
|= put_user(data
, &fix32
->smem_start
);
1256 err
|= put_user(fix
->smem_len
, &fix32
->smem_len
);
1257 err
|= put_user(fix
->type
, &fix32
->type
);
1258 err
|= put_user(fix
->type_aux
, &fix32
->type_aux
);
1259 err
|= put_user(fix
->visual
, &fix32
->visual
);
1260 err
|= put_user(fix
->xpanstep
, &fix32
->xpanstep
);
1261 err
|= put_user(fix
->ypanstep
, &fix32
->ypanstep
);
1262 err
|= put_user(fix
->ywrapstep
, &fix32
->ywrapstep
);
1263 err
|= put_user(fix
->line_length
, &fix32
->line_length
);
1265 data
= (__u32
) (unsigned long) fix
->mmio_start
;
1266 err
|= put_user(data
, &fix32
->mmio_start
);
1268 err
|= put_user(fix
->mmio_len
, &fix32
->mmio_len
);
1269 err
|= put_user(fix
->accel
, &fix32
->accel
);
1270 err
|= copy_to_user(fix32
->reserved
, fix
->reserved
,
1271 sizeof(fix
->reserved
));
1278 static int fb_get_fscreeninfo(struct fb_info
*info
, unsigned int cmd
,
1281 struct fb_fix_screeninfo fix
;
1285 if (info
->flags
& FBINFO_HIDE_SMEM_START
)
1287 unlock_fb_info(info
);
1288 return do_fscreeninfo_to_user(&fix
, compat_ptr(arg
));
1291 static long fb_compat_ioctl(struct file
*file
, unsigned int cmd
,
1294 struct fb_info
*info
= file_fb_info(file
);
1296 long ret
= -ENOIOCTLCMD
;
1302 case FBIOGET_VSCREENINFO
:
1303 case FBIOPUT_VSCREENINFO
:
1304 case FBIOPAN_DISPLAY
:
1305 case FBIOGET_CON2FBMAP
:
1306 case FBIOPUT_CON2FBMAP
:
1307 arg
= (unsigned long) compat_ptr(arg
);
1310 ret
= do_fb_ioctl(info
, cmd
, arg
);
1313 case FBIOGET_FSCREENINFO
:
1314 ret
= fb_get_fscreeninfo(info
, cmd
, arg
);
1319 ret
= fb_getput_cmap(info
, cmd
, arg
);
1323 if (fb
->fb_compat_ioctl
)
1324 ret
= fb
->fb_compat_ioctl(info
, cmd
, arg
);
1332 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
1334 struct fb_info
*info
= file_fb_info(file
);
1336 unsigned long mmio_pgoff
;
1337 unsigned long start
;
1343 mutex_lock(&info
->mm_lock
);
1348 * The framebuffer needs to be accessed decrypted, be sure
1349 * SME protection is removed ahead of the call
1351 vma
->vm_page_prot
= pgprot_decrypted(vma
->vm_page_prot
);
1352 res
= fb
->fb_mmap(info
, vma
);
1353 mutex_unlock(&info
->mm_lock
);
1358 * Ugh. This can be either the frame buffer mapping, or
1359 * if pgoff points past it, the mmio mapping.
1361 start
= info
->fix
.smem_start
;
1362 len
= info
->fix
.smem_len
;
1363 mmio_pgoff
= PAGE_ALIGN((start
& ~PAGE_MASK
) + len
) >> PAGE_SHIFT
;
1364 if (vma
->vm_pgoff
>= mmio_pgoff
) {
1365 if (info
->var
.accel_flags
) {
1366 mutex_unlock(&info
->mm_lock
);
1370 vma
->vm_pgoff
-= mmio_pgoff
;
1371 start
= info
->fix
.mmio_start
;
1372 len
= info
->fix
.mmio_len
;
1374 mutex_unlock(&info
->mm_lock
);
1376 vma
->vm_page_prot
= vm_get_page_prot(vma
->vm_flags
);
1378 * The framebuffer needs to be accessed decrypted, be sure
1379 * SME protection is removed
1381 vma
->vm_page_prot
= pgprot_decrypted(vma
->vm_page_prot
);
1382 fb_pgprotect(file
, vma
, start
);
1384 return vm_iomap_memory(vma
, start
, len
);
1388 fb_open(struct inode
*inode
, struct file
*file
)
1389 __acquires(&info
->lock
)
1390 __releases(&info
->lock
)
1392 int fbidx
= iminor(inode
);
1393 struct fb_info
*info
;
1396 info
= get_fb_info(fbidx
);
1398 request_module("fb%d", fbidx
);
1399 info
= get_fb_info(fbidx
);
1404 return PTR_ERR(info
);
1407 if (!try_module_get(info
->fbops
->owner
)) {
1411 file
->private_data
= info
;
1412 if (info
->fbops
->fb_open
) {
1413 res
= info
->fbops
->fb_open(info
,1);
1415 module_put(info
->fbops
->owner
);
1417 #ifdef CONFIG_FB_DEFERRED_IO
1419 fb_deferred_io_open(info
, inode
, file
);
1422 unlock_fb_info(info
);
1429 fb_release(struct inode
*inode
, struct file
*file
)
1430 __acquires(&info
->lock
)
1431 __releases(&info
->lock
)
1433 struct fb_info
* const info
= file
->private_data
;
1436 if (info
->fbops
->fb_release
)
1437 info
->fbops
->fb_release(info
,1);
1438 module_put(info
->fbops
->owner
);
1439 unlock_fb_info(info
);
1444 #if defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && !defined(CONFIG_MMU)
1445 unsigned long get_fb_unmapped_area(struct file
*filp
,
1446 unsigned long addr
, unsigned long len
,
1447 unsigned long pgoff
, unsigned long flags
)
1449 struct fb_info
* const info
= filp
->private_data
;
1450 unsigned long fb_size
= PAGE_ALIGN(info
->fix
.smem_len
);
1452 if (pgoff
> fb_size
|| len
> fb_size
- pgoff
)
1455 return (unsigned long)info
->screen_base
+ pgoff
;
1459 static const struct file_operations fb_fops
= {
1460 .owner
= THIS_MODULE
,
1463 .unlocked_ioctl
= fb_ioctl
,
1464 #ifdef CONFIG_COMPAT
1465 .compat_ioctl
= fb_compat_ioctl
,
1469 .release
= fb_release
,
1470 #if defined(HAVE_ARCH_FB_UNMAPPED_AREA) || \
1471 (defined(CONFIG_FB_PROVIDE_GET_FB_UNMAPPED_AREA) && \
1472 !defined(CONFIG_MMU))
1473 .get_unmapped_area
= get_fb_unmapped_area
,
1475 #ifdef CONFIG_FB_DEFERRED_IO
1476 .fsync
= fb_deferred_io_fsync
,
1478 .llseek
= default_llseek
,
1481 struct class *fb_class
;
1482 EXPORT_SYMBOL(fb_class
);
1484 static int fb_check_foreignness(struct fb_info
*fi
)
1486 const bool foreign_endian
= fi
->flags
& FBINFO_FOREIGN_ENDIAN
;
1488 fi
->flags
&= ~FBINFO_FOREIGN_ENDIAN
;
1491 fi
->flags
|= foreign_endian
? 0 : FBINFO_BE_MATH
;
1493 fi
->flags
|= foreign_endian
? FBINFO_BE_MATH
: 0;
1494 #endif /* __BIG_ENDIAN */
1496 if (fi
->flags
& FBINFO_BE_MATH
&& !fb_be_math(fi
)) {
1497 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1498 "support this framebuffer\n", fi
->fix
.id
);
1500 } else if (!(fi
->flags
& FBINFO_BE_MATH
) && fb_be_math(fi
)) {
1501 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1502 "support this framebuffer\n", fi
->fix
.id
);
1509 static bool apertures_overlap(struct aperture
*gen
, struct aperture
*hw
)
1511 /* is the generic aperture base the same as the HW one */
1512 if (gen
->base
== hw
->base
)
1514 /* is the generic aperture base inside the hw base->hw base+size */
1515 if (gen
->base
> hw
->base
&& gen
->base
< hw
->base
+ hw
->size
)
1520 static bool fb_do_apertures_overlap(struct apertures_struct
*gena
,
1521 struct apertures_struct
*hwa
)
1527 for (i
= 0; i
< hwa
->count
; ++i
) {
1528 struct aperture
*h
= &hwa
->ranges
[i
];
1529 for (j
= 0; j
< gena
->count
; ++j
) {
1530 struct aperture
*g
= &gena
->ranges
[j
];
1531 printk(KERN_DEBUG
"checking generic (%llx %llx) vs hw (%llx %llx)\n",
1532 (unsigned long long)g
->base
,
1533 (unsigned long long)g
->size
,
1534 (unsigned long long)h
->base
,
1535 (unsigned long long)h
->size
);
1536 if (apertures_overlap(g
, h
))
1544 static void do_unregister_framebuffer(struct fb_info
*fb_info
);
1546 #define VGA_FB_PHYS 0xA0000
1547 static void do_remove_conflicting_framebuffers(struct apertures_struct
*a
,
1548 const char *name
, bool primary
)
1552 /* check all firmware fbs and kick off if the base addr overlaps */
1553 for_each_registered_fb(i
) {
1554 struct apertures_struct
*gen_aper
;
1556 if (!(registered_fb
[i
]->flags
& FBINFO_MISC_FIRMWARE
))
1559 gen_aper
= registered_fb
[i
]->apertures
;
1560 if (fb_do_apertures_overlap(gen_aper
, a
) ||
1561 (primary
&& gen_aper
&& gen_aper
->count
&&
1562 gen_aper
->ranges
[0].base
== VGA_FB_PHYS
)) {
1564 printk(KERN_INFO
"fb%d: switching to %s from %s\n",
1565 i
, name
, registered_fb
[i
]->fix
.id
);
1566 do_unregister_framebuffer(registered_fb
[i
]);
1571 static bool lockless_register_fb
;
1572 module_param_named_unsafe(lockless_register_fb
, lockless_register_fb
, bool, 0400);
1573 MODULE_PARM_DESC(lockless_register_fb
,
1574 "Lockless framebuffer registration for debugging [default=off]");
1576 static int do_register_framebuffer(struct fb_info
*fb_info
)
1579 struct fb_videomode mode
;
1581 if (fb_check_foreignness(fb_info
))
1584 do_remove_conflicting_framebuffers(fb_info
->apertures
,
1586 fb_is_primary_device(fb_info
));
1588 if (num_registered_fb
== FB_MAX
)
1591 num_registered_fb
++;
1592 for (i
= 0 ; i
< FB_MAX
; i
++)
1593 if (!registered_fb
[i
])
1596 atomic_set(&fb_info
->count
, 1);
1597 mutex_init(&fb_info
->lock
);
1598 mutex_init(&fb_info
->mm_lock
);
1600 fb_info
->dev
= device_create(fb_class
, fb_info
->device
,
1601 MKDEV(FB_MAJOR
, i
), NULL
, "fb%d", i
);
1602 if (IS_ERR(fb_info
->dev
)) {
1604 printk(KERN_WARNING
"Unable to create device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->dev
));
1605 fb_info
->dev
= NULL
;
1607 fb_init_device(fb_info
);
1609 if (fb_info
->pixmap
.addr
== NULL
) {
1610 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1611 if (fb_info
->pixmap
.addr
) {
1612 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1613 fb_info
->pixmap
.buf_align
= 1;
1614 fb_info
->pixmap
.scan_align
= 1;
1615 fb_info
->pixmap
.access_align
= 32;
1616 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1619 fb_info
->pixmap
.offset
= 0;
1621 if (!fb_info
->pixmap
.blit_x
)
1622 fb_info
->pixmap
.blit_x
= ~(u32
)0;
1624 if (!fb_info
->pixmap
.blit_y
)
1625 fb_info
->pixmap
.blit_y
= ~(u32
)0;
1627 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1628 INIT_LIST_HEAD(&fb_info
->modelist
);
1630 if (fb_info
->skip_vt_switch
)
1631 pm_vt_switch_required(fb_info
->dev
, false);
1633 pm_vt_switch_required(fb_info
->dev
, true);
1635 fb_var_to_videomode(&mode
, &fb_info
->var
);
1636 fb_add_videomode(&mode
, &fb_info
->modelist
);
1637 registered_fb
[i
] = fb_info
;
1639 #ifdef CONFIG_GUMSTIX_AM200EPD
1641 struct fb_event event
;
1642 event
.info
= fb_info
;
1643 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED
, &event
);
1647 if (!lockless_register_fb
)
1650 atomic_inc(&ignore_console_lock_warning
);
1651 lock_fb_info(fb_info
);
1652 ret
= fbcon_fb_registered(fb_info
);
1653 unlock_fb_info(fb_info
);
1655 if (!lockless_register_fb
)
1658 atomic_dec(&ignore_console_lock_warning
);
1662 static void unbind_console(struct fb_info
*fb_info
)
1664 int i
= fb_info
->node
;
1666 if (WARN_ON(i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
))
1670 lock_fb_info(fb_info
);
1671 fbcon_fb_unbind(fb_info
);
1672 unlock_fb_info(fb_info
);
1676 void unlink_framebuffer(struct fb_info
*fb_info
)
1681 if (WARN_ON(i
< 0 || i
>= FB_MAX
|| registered_fb
[i
] != fb_info
))
1687 device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1689 pm_vt_switch_unregister(fb_info
->dev
);
1691 unbind_console(fb_info
);
1693 fb_info
->dev
= NULL
;
1695 EXPORT_SYMBOL(unlink_framebuffer
);
1697 static void do_unregister_framebuffer(struct fb_info
*fb_info
)
1699 unlink_framebuffer(fb_info
);
1700 if (fb_info
->pixmap
.addr
&&
1701 (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1702 kfree(fb_info
->pixmap
.addr
);
1703 fb_destroy_modelist(&fb_info
->modelist
);
1704 registered_fb
[fb_info
->node
] = NULL
;
1705 num_registered_fb
--;
1706 fb_cleanup_device(fb_info
);
1707 #ifdef CONFIG_GUMSTIX_AM200EPD
1709 struct fb_event event
;
1710 event
.info
= fb_info
;
1711 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED
, &event
);
1715 fbcon_fb_unregistered(fb_info
);
1718 /* this may free fb info */
1719 put_fb_info(fb_info
);
1723 * remove_conflicting_framebuffers - remove firmware-configured framebuffers
1724 * @a: memory range, users of which are to be removed
1725 * @name: requesting driver name
1726 * @primary: also kick vga16fb if present
1728 * This function removes framebuffer devices (initialized by firmware/bootloader)
1729 * which use memory range described by @a. If @a is NULL all such devices are
1732 int remove_conflicting_framebuffers(struct apertures_struct
*a
,
1733 const char *name
, bool primary
)
1735 bool do_free
= false;
1738 a
= alloc_apertures(1);
1742 a
->ranges
[0].base
= 0;
1743 a
->ranges
[0].size
= ~0;
1747 mutex_lock(®istration_lock
);
1748 do_remove_conflicting_framebuffers(a
, name
, primary
);
1749 mutex_unlock(®istration_lock
);
1756 EXPORT_SYMBOL(remove_conflicting_framebuffers
);
1759 * remove_conflicting_pci_framebuffers - remove firmware-configured framebuffers for PCI devices
1761 * @name: requesting driver name
1763 * This function removes framebuffer devices (eg. initialized by firmware)
1764 * using memory range configured for any of @pdev's memory bars.
1766 * The function assumes that PCI device with shadowed ROM drives a primary
1767 * display and so kicks out vga16fb.
1769 int remove_conflicting_pci_framebuffers(struct pci_dev
*pdev
, const char *name
)
1771 struct apertures_struct
*ap
;
1772 bool primary
= false;
1775 for (idx
= 0, bar
= 0; bar
< PCI_STD_NUM_BARS
; bar
++) {
1776 if (!(pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
))
1781 ap
= alloc_apertures(idx
);
1785 for (idx
= 0, bar
= 0; bar
< PCI_STD_NUM_BARS
; bar
++) {
1786 if (!(pci_resource_flags(pdev
, bar
) & IORESOURCE_MEM
))
1788 ap
->ranges
[idx
].base
= pci_resource_start(pdev
, bar
);
1789 ap
->ranges
[idx
].size
= pci_resource_len(pdev
, bar
);
1790 pci_dbg(pdev
, "%s: bar %d: 0x%lx -> 0x%lx\n", __func__
, bar
,
1791 (unsigned long)pci_resource_start(pdev
, bar
),
1792 (unsigned long)pci_resource_end(pdev
, bar
));
1797 primary
= pdev
->resource
[PCI_ROM_RESOURCE
].flags
&
1798 IORESOURCE_ROM_SHADOW
;
1800 err
= remove_conflicting_framebuffers(ap
, name
, primary
);
1804 EXPORT_SYMBOL(remove_conflicting_pci_framebuffers
);
1807 * register_framebuffer - registers a frame buffer device
1808 * @fb_info: frame buffer info structure
1810 * Registers a frame buffer device @fb_info.
1812 * Returns negative errno on error, or zero for success.
1816 register_framebuffer(struct fb_info
*fb_info
)
1820 mutex_lock(®istration_lock
);
1821 ret
= do_register_framebuffer(fb_info
);
1822 mutex_unlock(®istration_lock
);
1826 EXPORT_SYMBOL(register_framebuffer
);
1829 * unregister_framebuffer - releases a frame buffer device
1830 * @fb_info: frame buffer info structure
1832 * Unregisters a frame buffer device @fb_info.
1834 * Returns negative errno on error, or zero for success.
1836 * This function will also notify the framebuffer console
1837 * to release the driver.
1839 * This is meant to be called within a driver's module_exit()
1840 * function. If this is called outside module_exit(), ensure
1841 * that the driver implements fb_open() and fb_release() to
1842 * check that no processes are using the device.
1845 unregister_framebuffer(struct fb_info
*fb_info
)
1847 mutex_lock(®istration_lock
);
1848 do_unregister_framebuffer(fb_info
);
1849 mutex_unlock(®istration_lock
);
1851 EXPORT_SYMBOL(unregister_framebuffer
);
1854 * fb_set_suspend - low level driver signals suspend
1855 * @info: framebuffer affected
1856 * @state: 0 = resuming, !=0 = suspending
1858 * This is meant to be used by low level drivers to
1859 * signal suspend/resume to the core & clients.
1860 * It must be called with the console semaphore held
1862 void fb_set_suspend(struct fb_info
*info
, int state
)
1864 WARN_CONSOLE_UNLOCKED();
1867 fbcon_suspended(info
);
1868 info
->state
= FBINFO_STATE_SUSPENDED
;
1870 info
->state
= FBINFO_STATE_RUNNING
;
1871 fbcon_resumed(info
);
1874 EXPORT_SYMBOL(fb_set_suspend
);
1877 * fbmem_init - init frame buffer subsystem
1879 * Initialize the frame buffer subsystem.
1881 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1890 if (!proc_create_seq("fb", 0, NULL
, &proc_fb_seq_ops
))
1893 ret
= register_chrdev(FB_MAJOR
, "fb", &fb_fops
);
1895 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1899 fb_class
= class_create(THIS_MODULE
, "graphics");
1900 if (IS_ERR(fb_class
)) {
1901 ret
= PTR_ERR(fb_class
);
1902 pr_warn("Unable to create fb class; errno = %d\n", ret
);
1912 unregister_chrdev(FB_MAJOR
, "fb");
1914 remove_proc_entry("fb", NULL
);
1919 module_init(fbmem_init
);
1925 remove_proc_entry("fb", NULL
);
1926 class_destroy(fb_class
);
1927 unregister_chrdev(FB_MAJOR
, "fb");
1930 module_exit(fbmem_exit
);
1931 MODULE_LICENSE("GPL");
1932 MODULE_DESCRIPTION("Framebuffer base");
1934 subsys_initcall(fbmem_init
);
1937 int fb_new_modelist(struct fb_info
*info
)
1939 struct fb_var_screeninfo var
= info
->var
;
1940 struct list_head
*pos
, *n
;
1941 struct fb_modelist
*modelist
;
1942 struct fb_videomode
*m
, mode
;
1945 list_for_each_safe(pos
, n
, &info
->modelist
) {
1946 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1947 m
= &modelist
->mode
;
1948 fb_videomode_to_var(&var
, m
);
1949 var
.activate
= FB_ACTIVATE_TEST
;
1950 err
= fb_set_var(info
, &var
);
1951 fb_var_to_videomode(&mode
, &var
);
1952 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1958 if (list_empty(&info
->modelist
))
1961 fbcon_new_modelist(info
);
1966 MODULE_LICENSE("GPL");