2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
14 #include <linux/config.h>
15 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/smp_lock.h>
21 #include <linux/kernel.h>
22 #include <linux/major.h>
23 #include <linux/slab.h>
25 #include <linux/mman.h>
26 #include <linux/tty.h>
27 #include <linux/init.h>
28 #include <linux/linux_logo.h>
29 #include <linux/proc_fs.h>
30 #include <linux/console.h>
32 #include <linux/kmod.h>
34 #include <linux/devfs_fs_kernel.h>
35 #include <linux/err.h>
36 #include <linux/kernel.h>
37 #include <linux/device.h>
38 #include <linux/efi.h>
40 #if defined(__mc68000__) || defined(CONFIG_APUS)
41 #include <asm/setup.h>
45 #include <asm/uaccess.h>
47 #include <asm/pgtable.h>
52 * Frame buffer device initialization and setup routines
55 #define FBPIXMAPSIZE (1024 * 8)
57 static struct notifier_block
*fb_notifier_list
;
58 struct fb_info
*registered_fb
[FB_MAX
];
59 int num_registered_fb
;
65 int fb_get_color_depth(struct fb_var_screeninfo
*var
,
66 struct fb_fix_screeninfo
*fix
)
70 if (fix
->visual
== FB_VISUAL_MONO01
||
71 fix
->visual
== FB_VISUAL_MONO10
)
74 if (var
->green
.length
== var
->blue
.length
&&
75 var
->green
.length
== var
->red
.length
&&
76 var
->green
.offset
== var
->blue
.offset
&&
77 var
->green
.offset
== var
->red
.offset
)
78 depth
= var
->green
.length
;
80 depth
= var
->green
.length
+ var
->red
.length
+
86 EXPORT_SYMBOL(fb_get_color_depth
);
89 * Data padding functions.
91 void fb_pad_aligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 s_pitch
, u32 height
)
93 __fb_pad_aligned_buffer(dst
, d_pitch
, src
, s_pitch
, height
);
95 EXPORT_SYMBOL(fb_pad_aligned_buffer
);
97 void fb_pad_unaligned_buffer(u8
*dst
, u32 d_pitch
, u8
*src
, u32 idx
, u32 height
,
98 u32 shift_high
, u32 shift_low
, u32 mod
)
100 u8 mask
= (u8
) (0xfff << shift_high
), tmp
;
103 for (i
= height
; i
--; ) {
104 for (j
= 0; j
< idx
; j
++) {
107 tmp
|= *src
>> shift_low
;
109 tmp
= *src
<< shift_high
;
115 tmp
|= *src
>> shift_low
;
117 if (shift_high
< mod
) {
118 tmp
= *src
<< shift_high
;
125 EXPORT_SYMBOL(fb_pad_unaligned_buffer
);
128 * we need to lock this section since fb_cursor
129 * may use fb_imageblit()
131 char* fb_get_buffer_offset(struct fb_info
*info
, struct fb_pixmap
*buf
, u32 size
)
133 u32 align
= buf
->buf_align
- 1, offset
;
134 char *addr
= buf
->addr
;
136 /* If IO mapped, we need to sync before access, no sharing of
139 if (buf
->flags
& FB_PIXMAP_IO
) {
140 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
141 info
->fbops
->fb_sync(info
);
145 /* See if we fit in the remaining pixmap space */
146 offset
= buf
->offset
+ align
;
148 if (offset
+ size
> buf
->size
) {
149 /* We do not fit. In order to be able to re-use the buffer,
150 * we must ensure no asynchronous DMA'ing or whatever operation
151 * is in progress, we sync for that.
153 if (info
->fbops
->fb_sync
&& (buf
->flags
& FB_PIXMAP_SYNC
))
154 info
->fbops
->fb_sync(info
);
157 buf
->offset
= offset
+ size
;
164 #include <linux/linux_logo.h>
166 static inline unsigned safe_shift(unsigned d
, int n
)
168 return n
< 0 ? d
>> -n
: d
<< n
;
171 static void fb_set_logocmap(struct fb_info
*info
,
172 const struct linux_logo
*logo
)
174 struct fb_cmap palette_cmap
;
175 u16 palette_green
[16];
176 u16 palette_blue
[16];
179 const unsigned char *clut
= logo
->clut
;
181 palette_cmap
.start
= 0;
182 palette_cmap
.len
= 16;
183 palette_cmap
.red
= palette_red
;
184 palette_cmap
.green
= palette_green
;
185 palette_cmap
.blue
= palette_blue
;
186 palette_cmap
.transp
= NULL
;
188 for (i
= 0; i
< logo
->clutsize
; i
+= n
) {
189 n
= logo
->clutsize
- i
;
190 /* palette_cmap provides space for only 16 colors at once */
193 palette_cmap
.start
= 32 + i
;
194 palette_cmap
.len
= n
;
195 for (j
= 0; j
< n
; ++j
) {
196 palette_cmap
.red
[j
] = clut
[0] << 8 | clut
[0];
197 palette_cmap
.green
[j
] = clut
[1] << 8 | clut
[1];
198 palette_cmap
.blue
[j
] = clut
[2] << 8 | clut
[2];
201 fb_set_cmap(&palette_cmap
, info
);
205 static void fb_set_logo_truepalette(struct fb_info
*info
,
206 const struct linux_logo
*logo
,
209 unsigned char mask
[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
210 unsigned char redmask
, greenmask
, bluemask
;
211 int redshift
, greenshift
, blueshift
;
213 const unsigned char *clut
= logo
->clut
;
216 * We have to create a temporary palette since console palette is only
219 /* Bug: Doesn't obey msb_right ... (who needs that?) */
220 redmask
= mask
[info
->var
.red
.length
< 8 ? info
->var
.red
.length
: 8];
221 greenmask
= mask
[info
->var
.green
.length
< 8 ? info
->var
.green
.length
: 8];
222 bluemask
= mask
[info
->var
.blue
.length
< 8 ? info
->var
.blue
.length
: 8];
223 redshift
= info
->var
.red
.offset
- (8 - info
->var
.red
.length
);
224 greenshift
= info
->var
.green
.offset
- (8 - info
->var
.green
.length
);
225 blueshift
= info
->var
.blue
.offset
- (8 - info
->var
.blue
.length
);
227 for ( i
= 0; i
< logo
->clutsize
; i
++) {
228 palette
[i
+32] = (safe_shift((clut
[0] & redmask
), redshift
) |
229 safe_shift((clut
[1] & greenmask
), greenshift
) |
230 safe_shift((clut
[2] & bluemask
), blueshift
));
235 static void fb_set_logo_directpalette(struct fb_info
*info
,
236 const struct linux_logo
*logo
,
239 int redshift
, greenshift
, blueshift
;
242 redshift
= info
->var
.red
.offset
;
243 greenshift
= info
->var
.green
.offset
;
244 blueshift
= info
->var
.blue
.offset
;
246 for (i
= 32; i
< logo
->clutsize
; i
++)
247 palette
[i
] = i
<< redshift
| i
<< greenshift
| i
<< blueshift
;
250 static void fb_set_logo(struct fb_info
*info
,
251 const struct linux_logo
*logo
, u8
*dst
,
255 const u8
*src
= logo
->data
;
256 u8
xor = (info
->fix
.visual
== FB_VISUAL_MONO01
) ? 0xff : 0;
259 if (fb_get_color_depth(&info
->var
, &info
->fix
) == 3)
262 if (info
->fix
.visual
== FB_VISUAL_MONO01
||
263 info
->fix
.visual
== FB_VISUAL_MONO10
)
264 fg
= ~((u8
) (0xfff << info
->var
.green
.length
));
268 for (i
= 0; i
< logo
->height
; i
++)
269 for (j
= 0; j
< logo
->width
; src
++) {
272 if (j
< logo
->width
) {
273 *dst
++ = *src
& 0x0f;
279 for (i
= 0; i
< logo
->height
; i
++) {
280 for (j
= 0; j
< logo
->width
; src
++) {
282 for (k
= 7; k
>= 0; k
--) {
283 *dst
++ = ((d
>> k
) & 1) ? fg
: 0;
293 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
294 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
295 * the visual format and color depth of the framebuffer, the DAC, the
296 * pseudo_palette, and the logo data will be adjusted accordingly.
298 * Case 1 - linux_logo_clut224:
299 * Color exceeds the number of console colors (16), thus we set the hardware DAC
300 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
302 * For visuals that require color info from the pseudo_palette, we also construct
303 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
306 * Case 2 - linux_logo_vga16:
307 * The number of colors just matches the console colors, thus there is no need
308 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
309 * each byte contains color information for two pixels (upper and lower nibble).
310 * To be consistent with fb_imageblit() usage, we therefore separate the two
311 * nibbles into separate bytes. The "depth" flag will be set to 4.
313 * Case 3 - linux_logo_mono:
314 * This is similar with Case 2. Each byte contains information for 8 pixels.
315 * We isolate each bit and expand each into a byte. The "depth" flag will
318 static struct logo_data
{
320 int needs_directpalette
;
321 int needs_truepalette
;
323 const struct linux_logo
*logo
;
326 int fb_prepare_logo(struct fb_info
*info
)
328 int depth
= fb_get_color_depth(&info
->var
, &info
->fix
);
330 memset(&fb_logo
, 0, sizeof(struct logo_data
));
332 if (info
->flags
& FBINFO_MISC_TILEBLITTING
)
335 if (info
->fix
.visual
== FB_VISUAL_DIRECTCOLOR
) {
336 depth
= info
->var
.blue
.length
;
337 if (info
->var
.red
.length
< depth
)
338 depth
= info
->var
.red
.length
;
339 if (info
->var
.green
.length
< depth
)
340 depth
= info
->var
.green
.length
;
344 switch (info
->fix
.visual
) {
345 case FB_VISUAL_TRUECOLOR
:
346 fb_logo
.needs_truepalette
= 1;
348 case FB_VISUAL_DIRECTCOLOR
:
349 fb_logo
.needs_directpalette
= 1;
350 fb_logo
.needs_cmapreset
= 1;
352 case FB_VISUAL_PSEUDOCOLOR
:
353 fb_logo
.needs_cmapreset
= 1;
358 /* Return if no suitable logo was found */
359 fb_logo
.logo
= fb_find_logo(depth
);
361 if (!fb_logo
.logo
|| fb_logo
.logo
->height
> info
->var
.yres
) {
365 /* What depth we asked for might be different from what we get */
366 if (fb_logo
.logo
->type
== LINUX_LOGO_CLUT224
)
368 else if (fb_logo
.logo
->type
== LINUX_LOGO_VGA16
)
372 return fb_logo
.logo
->height
;
375 int fb_show_logo(struct fb_info
*info
)
377 u32
*palette
= NULL
, *saved_pseudo_palette
= NULL
;
378 unsigned char *logo_new
= NULL
;
379 struct fb_image image
;
382 /* Return if the frame buffer is not mapped or suspended */
383 if (fb_logo
.logo
== NULL
|| info
->state
!= FBINFO_STATE_RUNNING
)
387 image
.data
= fb_logo
.logo
->data
;
389 if (fb_logo
.needs_cmapreset
)
390 fb_set_logocmap(info
, fb_logo
.logo
);
392 if (fb_logo
.needs_truepalette
||
393 fb_logo
.needs_directpalette
) {
394 palette
= kmalloc(256 * 4, GFP_KERNEL
);
398 if (fb_logo
.needs_truepalette
)
399 fb_set_logo_truepalette(info
, fb_logo
.logo
, palette
);
401 fb_set_logo_directpalette(info
, fb_logo
.logo
, palette
);
403 saved_pseudo_palette
= info
->pseudo_palette
;
404 info
->pseudo_palette
= palette
;
407 if (fb_logo
.depth
<= 4) {
408 logo_new
= kmalloc(fb_logo
.logo
->width
* fb_logo
.logo
->height
,
410 if (logo_new
== NULL
) {
412 if (saved_pseudo_palette
)
413 info
->pseudo_palette
= saved_pseudo_palette
;
416 image
.data
= logo_new
;
417 fb_set_logo(info
, fb_logo
.logo
, logo_new
, fb_logo
.depth
);
420 image
.width
= fb_logo
.logo
->width
;
421 image
.height
= fb_logo
.logo
->height
;
424 for (x
= 0; x
< num_online_cpus() * (fb_logo
.logo
->width
+ 8) &&
425 x
<= info
->var
.xres
-fb_logo
.logo
->width
; x
+= (fb_logo
.logo
->width
+ 8)) {
427 info
->fbops
->fb_imageblit(info
, &image
);
431 if (saved_pseudo_palette
!= NULL
)
432 info
->pseudo_palette
= saved_pseudo_palette
;
434 return fb_logo
.logo
->height
;
437 int fb_prepare_logo(struct fb_info
*info
) { return 0; }
438 int fb_show_logo(struct fb_info
*info
) { return 0; }
439 #endif /* CONFIG_LOGO */
441 static int fbmem_read_proc(char *buf
, char **start
, off_t offset
,
442 int len
, int *eof
, void *private)
448 for (fi
= registered_fb
; fi
< ®istered_fb
[FB_MAX
] && len
< 4000; fi
++)
450 clen
+= sprintf(buf
+ clen
, "%d %s\n",
453 *start
= buf
+ offset
;
458 return clen
< len
? clen
: len
;
462 fb_read(struct file
*file
, char __user
*buf
, size_t count
, loff_t
*ppos
)
464 unsigned long p
= *ppos
;
465 struct inode
*inode
= file
->f_dentry
->d_inode
;
466 int fbidx
= iminor(inode
);
467 struct fb_info
*info
= registered_fb
[fbidx
];
470 int c
, i
, cnt
= 0, err
= 0;
471 unsigned long total_size
;
473 if (!info
|| ! info
->screen_base
)
476 if (info
->state
!= FBINFO_STATE_RUNNING
)
479 if (info
->fbops
->fb_read
)
480 return info
->fbops
->fb_read(file
, buf
, count
, ppos
);
482 total_size
= info
->screen_size
;
484 total_size
= info
->fix
.smem_len
;
488 if (count
>= total_size
)
490 if (count
+ p
> total_size
)
491 count
= total_size
- p
;
494 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
499 src
= (u32 __iomem
*) (info
->screen_base
+ p
);
501 if (info
->fbops
->fb_sync
)
502 info
->fbops
->fb_sync(info
);
505 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
507 for (i
= c
>> 2; i
--; )
508 *dst
++ = fb_readl(src
++);
510 u8
*dst8
= (u8
*) dst
;
511 u8 __iomem
*src8
= (u8 __iomem
*) src
;
513 for (i
= c
& 3; i
--;)
514 *dst8
++ = fb_readb(src8
++);
516 src
= (u32 __iomem
*) src8
;
519 if (copy_to_user(buf
, buffer
, c
)) {
530 return (err
) ? err
: cnt
;
534 fb_write(struct file
*file
, const char __user
*buf
, size_t count
, loff_t
*ppos
)
536 unsigned long p
= *ppos
;
537 struct inode
*inode
= file
->f_dentry
->d_inode
;
538 int fbidx
= iminor(inode
);
539 struct fb_info
*info
= registered_fb
[fbidx
];
542 int c
, i
, cnt
= 0, err
;
543 unsigned long total_size
;
545 if (!info
|| !info
->screen_base
)
548 if (info
->state
!= FBINFO_STATE_RUNNING
)
551 if (info
->fbops
->fb_write
)
552 return info
->fbops
->fb_write(file
, buf
, count
, ppos
);
554 total_size
= info
->screen_size
;
556 total_size
= info
->fix
.smem_len
;
560 if (count
>= total_size
)
563 if (count
+ p
> total_size
) {
564 count
= total_size
- p
;
568 buffer
= kmalloc((count
> PAGE_SIZE
) ? PAGE_SIZE
: count
,
573 dst
= (u32 __iomem
*) (info
->screen_base
+ p
);
575 if (info
->fbops
->fb_sync
)
576 info
->fbops
->fb_sync(info
);
579 c
= (count
> PAGE_SIZE
) ? PAGE_SIZE
: count
;
581 if (copy_from_user(src
, buf
, c
)) {
585 for (i
= c
>> 2; i
--; )
586 fb_writel(*src
++, dst
++);
588 u8
*src8
= (u8
*) src
;
589 u8 __iomem
*dst8
= (u8 __iomem
*) dst
;
591 for (i
= c
& 3; i
--; )
592 fb_writeb(*src8
++, dst8
++);
594 dst
= (u32 __iomem
*) dst8
;
603 return (err
) ? err
: cnt
;
607 static void try_to_load(int fb
)
609 request_module("fb%d", fb
);
611 #endif /* CONFIG_KMOD */
614 fb_pan_display(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
616 int xoffset
= var
->xoffset
;
617 int yoffset
= var
->yoffset
;
620 if (xoffset
< 0 || yoffset
< 0 || !info
->fbops
->fb_pan_display
||
621 xoffset
+ info
->var
.xres
> info
->var
.xres_virtual
||
622 yoffset
+ info
->var
.yres
> info
->var
.yres_virtual
)
624 if ((err
= info
->fbops
->fb_pan_display(var
, info
)))
626 info
->var
.xoffset
= var
->xoffset
;
627 info
->var
.yoffset
= var
->yoffset
;
628 if (var
->vmode
& FB_VMODE_YWRAP
)
629 info
->var
.vmode
|= FB_VMODE_YWRAP
;
631 info
->var
.vmode
&= ~FB_VMODE_YWRAP
;
636 fb_set_var(struct fb_info
*info
, struct fb_var_screeninfo
*var
)
638 int err
, flags
= info
->flags
;
640 if (var
->activate
& FB_ACTIVATE_INV_MODE
) {
641 struct fb_videomode mode1
, mode2
;
644 fb_var_to_videomode(&mode1
, var
);
645 fb_var_to_videomode(&mode2
, &info
->var
);
646 /* make sure we don't delete the videomode of current var */
647 ret
= fb_mode_is_equal(&mode1
, &mode2
);
650 struct fb_event event
;
654 ret
= notifier_call_chain(&fb_notifier_list
,
655 FB_EVENT_MODE_DELETE
, &event
);
659 fb_delete_videomode(&mode1
, &info
->modelist
);
664 if ((var
->activate
& FB_ACTIVATE_FORCE
) ||
665 memcmp(&info
->var
, var
, sizeof(struct fb_var_screeninfo
))) {
666 if (!info
->fbops
->fb_check_var
) {
671 if ((err
= info
->fbops
->fb_check_var(var
, info
)))
674 if ((var
->activate
& FB_ACTIVATE_MASK
) == FB_ACTIVATE_NOW
) {
675 struct fb_videomode mode
;
679 if (info
->fbops
->fb_set_par
)
680 info
->fbops
->fb_set_par(info
);
682 fb_pan_display(info
, &info
->var
);
684 fb_set_cmap(&info
->cmap
, info
);
686 fb_var_to_videomode(&mode
, &info
->var
);
688 if (info
->modelist
.prev
&& info
->modelist
.next
&&
689 !list_empty(&info
->modelist
))
690 err
= fb_add_videomode(&mode
, &info
->modelist
);
692 if (!err
&& (flags
& FBINFO_MISC_USEREVENT
)) {
693 struct fb_event event
;
694 int evnt
= (var
->activate
& FB_ACTIVATE_ALL
) ?
695 FB_EVENT_MODE_CHANGE_ALL
:
696 FB_EVENT_MODE_CHANGE
;
698 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
700 notifier_call_chain(&fb_notifier_list
, evnt
,
709 fb_blank(struct fb_info
*info
, int blank
)
713 if (blank
> FB_BLANK_POWERDOWN
)
714 blank
= FB_BLANK_POWERDOWN
;
716 if (info
->fbops
->fb_blank
)
717 ret
= info
->fbops
->fb_blank(blank
, info
);
720 struct fb_event event
;
724 notifier_call_chain(&fb_notifier_list
, FB_EVENT_BLANK
, &event
);
731 fb_ioctl(struct inode
*inode
, struct file
*file
, unsigned int cmd
,
734 int fbidx
= iminor(inode
);
735 struct fb_info
*info
= registered_fb
[fbidx
];
736 struct fb_ops
*fb
= info
->fbops
;
737 struct fb_var_screeninfo var
;
738 struct fb_fix_screeninfo fix
;
739 struct fb_con2fbmap con2fb
;
740 struct fb_cmap_user cmap
;
741 struct fb_event event
;
742 void __user
*argp
= (void __user
*)arg
;
748 case FBIOGET_VSCREENINFO
:
749 return copy_to_user(argp
, &info
->var
,
750 sizeof(var
)) ? -EFAULT
: 0;
751 case FBIOPUT_VSCREENINFO
:
752 if (copy_from_user(&var
, argp
, sizeof(var
)))
754 acquire_console_sem();
755 info
->flags
|= FBINFO_MISC_USEREVENT
;
756 i
= fb_set_var(info
, &var
);
757 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
758 release_console_sem();
760 if (copy_to_user(argp
, &var
, sizeof(var
)))
763 case FBIOGET_FSCREENINFO
:
764 return copy_to_user(argp
, &info
->fix
,
765 sizeof(fix
)) ? -EFAULT
: 0;
767 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
769 return (fb_set_user_cmap(&cmap
, info
));
771 if (copy_from_user(&cmap
, argp
, sizeof(cmap
)))
773 return fb_cmap_to_user(&info
->cmap
, &cmap
);
774 case FBIOPAN_DISPLAY
:
775 if (copy_from_user(&var
, argp
, sizeof(var
)))
777 acquire_console_sem();
778 i
= fb_pan_display(info
, &var
);
779 release_console_sem();
782 if (copy_to_user(argp
, &var
, sizeof(var
)))
787 case FBIOGET_CON2FBMAP
:
788 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
790 if (con2fb
.console
< 1 || con2fb
.console
> MAX_NR_CONSOLES
)
792 con2fb
.framebuffer
= -1;
794 event
.data
= &con2fb
;
795 notifier_call_chain(&fb_notifier_list
,
796 FB_EVENT_GET_CONSOLE_MAP
, &event
);
797 return copy_to_user(argp
, &con2fb
,
798 sizeof(con2fb
)) ? -EFAULT
: 0;
799 case FBIOPUT_CON2FBMAP
:
800 if (copy_from_user(&con2fb
, argp
, sizeof(con2fb
)))
802 if (con2fb
.console
< 0 || con2fb
.console
> MAX_NR_CONSOLES
)
804 if (con2fb
.framebuffer
< 0 || con2fb
.framebuffer
>= FB_MAX
)
807 if (!registered_fb
[con2fb
.framebuffer
])
808 try_to_load(con2fb
.framebuffer
);
809 #endif /* CONFIG_KMOD */
810 if (!registered_fb
[con2fb
.framebuffer
])
813 event
.data
= &con2fb
;
814 return notifier_call_chain(&fb_notifier_list
,
815 FB_EVENT_SET_CONSOLE_MAP
,
818 acquire_console_sem();
819 info
->flags
|= FBINFO_MISC_USEREVENT
;
820 i
= fb_blank(info
, arg
);
821 info
->flags
&= ~FBINFO_MISC_USEREVENT
;
822 release_console_sem();
825 if (fb
->fb_ioctl
== NULL
)
827 return fb
->fb_ioctl(inode
, file
, cmd
, arg
, info
);
833 fb_compat_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
835 int fbidx
= iminor(file
->f_dentry
->d_inode
);
836 struct fb_info
*info
= registered_fb
[fbidx
];
837 struct fb_ops
*fb
= info
->fbops
;
840 if (fb
->fb_compat_ioctl
== NULL
)
843 ret
= fb
->fb_compat_ioctl(file
, cmd
, arg
, info
);
850 fb_mmap(struct file
*file
, struct vm_area_struct
* vma
)
852 int fbidx
= iminor(file
->f_dentry
->d_inode
);
853 struct fb_info
*info
= registered_fb
[fbidx
];
854 struct fb_ops
*fb
= info
->fbops
;
856 #if !defined(__sparc__) || defined(__sparc_v9__)
861 if (vma
->vm_pgoff
> (~0UL >> PAGE_SHIFT
))
863 off
= vma
->vm_pgoff
<< PAGE_SHIFT
;
869 res
= fb
->fb_mmap(info
, file
, vma
);
874 #if defined(__sparc__) && !defined(__sparc_v9__)
875 /* Should never get here, all fb drivers should have their own
882 /* frame buffer memory */
883 start
= info
->fix
.smem_start
;
884 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.smem_len
);
886 /* memory mapped io */
888 if (info
->var
.accel_flags
) {
892 start
= info
->fix
.mmio_start
;
893 len
= PAGE_ALIGN((start
& ~PAGE_MASK
) + info
->fix
.mmio_len
);
897 if ((vma
->vm_end
- vma
->vm_start
+ off
) > len
)
900 vma
->vm_pgoff
= off
>> PAGE_SHIFT
;
901 /* This is an IO map - tell maydump to skip this VMA */
902 vma
->vm_flags
|= VM_IO
| VM_RESERVED
;
903 #if defined(__sparc_v9__)
904 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
905 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
908 #if defined(__mc68000__)
909 #if defined(CONFIG_SUN3)
910 pgprot_val(vma
->vm_page_prot
) |= SUN3_PAGE_NOCACHE
;
911 #elif defined(CONFIG_MMU)
912 if (CPU_IS_020_OR_030
)
913 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE030
;
914 if (CPU_IS_040_OR_060
) {
915 pgprot_val(vma
->vm_page_prot
) &= _CACHEMASK040
;
916 /* Use no-cache mode, serialized */
917 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NOCACHE_S
;
920 #elif defined(__powerpc__)
921 vma
->vm_page_prot
= phys_mem_access_prot(file
, off
,
922 vma
->vm_end
- vma
->vm_start
,
924 #elif defined(__alpha__)
925 /* Caching is off in the I/O space quadrant by design. */
926 #elif defined(__i386__) || defined(__x86_64__)
927 if (boot_cpu_data
.x86
> 3)
928 pgprot_val(vma
->vm_page_prot
) |= _PAGE_PCD
;
929 #elif defined(__mips__)
930 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
931 #elif defined(__hppa__)
932 pgprot_val(vma
->vm_page_prot
) |= _PAGE_NO_CACHE
;
933 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
934 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
935 #elif defined(__ia64__)
936 if (efi_range_is_wc(vma
->vm_start
, vma
->vm_end
- vma
->vm_start
))
937 vma
->vm_page_prot
= pgprot_writecombine(vma
->vm_page_prot
);
939 vma
->vm_page_prot
= pgprot_noncached(vma
->vm_page_prot
);
941 #warning What do we have to do here??
943 if (io_remap_pfn_range(vma
, vma
->vm_start
, off
>> PAGE_SHIFT
,
944 vma
->vm_end
- vma
->vm_start
, vma
->vm_page_prot
))
946 #endif /* !__sparc_v9__ */
948 #endif /* !sparc32 */
952 fb_open(struct inode
*inode
, struct file
*file
)
954 int fbidx
= iminor(inode
);
955 struct fb_info
*info
;
961 if (!(info
= registered_fb
[fbidx
]))
963 #endif /* CONFIG_KMOD */
964 if (!(info
= registered_fb
[fbidx
]))
966 if (!try_module_get(info
->fbops
->owner
))
968 if (info
->fbops
->fb_open
) {
969 res
= info
->fbops
->fb_open(info
,1);
971 module_put(info
->fbops
->owner
);
977 fb_release(struct inode
*inode
, struct file
*file
)
979 int fbidx
= iminor(inode
);
980 struct fb_info
*info
;
983 info
= registered_fb
[fbidx
];
984 if (info
->fbops
->fb_release
)
985 info
->fbops
->fb_release(info
,1);
986 module_put(info
->fbops
->owner
);
991 static struct file_operations fb_fops
= {
992 .owner
= THIS_MODULE
,
997 .compat_ioctl
= fb_compat_ioctl
,
1001 .release
= fb_release
,
1002 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1003 .get_unmapped_area
= get_fb_unmapped_area
,
1007 static struct class *fb_class
;
1010 * register_framebuffer - registers a frame buffer device
1011 * @fb_info: frame buffer info structure
1013 * Registers a frame buffer device @fb_info.
1015 * Returns negative errno on error, or zero for success.
1020 register_framebuffer(struct fb_info
*fb_info
)
1023 struct fb_event event
;
1024 struct fb_videomode mode
;
1026 if (num_registered_fb
== FB_MAX
)
1028 num_registered_fb
++;
1029 for (i
= 0 ; i
< FB_MAX
; i
++)
1030 if (!registered_fb
[i
])
1034 fb_info
->class_device
= class_device_create(fb_class
, MKDEV(FB_MAJOR
, i
),
1035 fb_info
->device
, "fb%d", i
);
1036 if (IS_ERR(fb_info
->class_device
)) {
1038 printk(KERN_WARNING
"Unable to create class_device for framebuffer %d; errno = %ld\n", i
, PTR_ERR(fb_info
->class_device
));
1039 fb_info
->class_device
= NULL
;
1041 fb_init_class_device(fb_info
);
1043 if (fb_info
->pixmap
.addr
== NULL
) {
1044 fb_info
->pixmap
.addr
= kmalloc(FBPIXMAPSIZE
, GFP_KERNEL
);
1045 if (fb_info
->pixmap
.addr
) {
1046 fb_info
->pixmap
.size
= FBPIXMAPSIZE
;
1047 fb_info
->pixmap
.buf_align
= 1;
1048 fb_info
->pixmap
.scan_align
= 1;
1049 fb_info
->pixmap
.access_align
= 32;
1050 fb_info
->pixmap
.flags
= FB_PIXMAP_DEFAULT
;
1053 fb_info
->pixmap
.offset
= 0;
1055 if (!fb_info
->modelist
.prev
|| !fb_info
->modelist
.next
)
1056 INIT_LIST_HEAD(&fb_info
->modelist
);
1058 fb_var_to_videomode(&mode
, &fb_info
->var
);
1059 fb_add_videomode(&mode
, &fb_info
->modelist
);
1060 registered_fb
[i
] = fb_info
;
1062 devfs_mk_cdev(MKDEV(FB_MAJOR
, i
),
1063 S_IFCHR
| S_IRUGO
| S_IWUGO
, "fb/%d", i
);
1064 event
.info
= fb_info
;
1065 notifier_call_chain(&fb_notifier_list
,
1066 FB_EVENT_FB_REGISTERED
, &event
);
1072 * unregister_framebuffer - releases a frame buffer device
1073 * @fb_info: frame buffer info structure
1075 * Unregisters a frame buffer device @fb_info.
1077 * Returns negative errno on error, or zero for success.
1082 unregister_framebuffer(struct fb_info
*fb_info
)
1087 if (!registered_fb
[i
])
1089 devfs_remove("fb/%d", i
);
1091 if (fb_info
->pixmap
.addr
&& (fb_info
->pixmap
.flags
& FB_PIXMAP_DEFAULT
))
1092 kfree(fb_info
->pixmap
.addr
);
1093 fb_destroy_modelist(&fb_info
->modelist
);
1094 registered_fb
[i
]=NULL
;
1095 num_registered_fb
--;
1096 fb_cleanup_class_device(fb_info
);
1097 class_device_destroy(fb_class
, MKDEV(FB_MAJOR
, i
));
1102 * fb_register_client - register a client notifier
1103 * @nb: notifier block to callback on events
1105 int fb_register_client(struct notifier_block
*nb
)
1107 return notifier_chain_register(&fb_notifier_list
, nb
);
1111 * fb_unregister_client - unregister a client notifier
1112 * @nb: notifier block to callback on events
1114 int fb_unregister_client(struct notifier_block
*nb
)
1116 return notifier_chain_unregister(&fb_notifier_list
, nb
);
1120 * fb_set_suspend - low level driver signals suspend
1121 * @info: framebuffer affected
1122 * @state: 0 = resuming, !=0 = suspending
1124 * This is meant to be used by low level drivers to
1125 * signal suspend/resume to the core & clients.
1126 * It must be called with the console semaphore held
1128 void fb_set_suspend(struct fb_info
*info
, int state
)
1130 struct fb_event event
;
1134 notifier_call_chain(&fb_notifier_list
, FB_EVENT_SUSPEND
, &event
);
1135 info
->state
= FBINFO_STATE_SUSPENDED
;
1137 info
->state
= FBINFO_STATE_RUNNING
;
1138 notifier_call_chain(&fb_notifier_list
, FB_EVENT_RESUME
, &event
);
1143 * fbmem_init - init frame buffer subsystem
1145 * Initialize the frame buffer subsystem.
1147 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1154 create_proc_read_entry("fb", 0, NULL
, fbmem_read_proc
, NULL
);
1157 if (register_chrdev(FB_MAJOR
,"fb",&fb_fops
))
1158 printk("unable to get major %d for fb devs\n", FB_MAJOR
);
1160 fb_class
= class_create(THIS_MODULE
, "graphics");
1161 if (IS_ERR(fb_class
)) {
1162 printk(KERN_WARNING
"Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class
));
1169 module_init(fbmem_init
);
1173 class_destroy(fb_class
);
1174 unregister_chrdev(FB_MAJOR
, "fb");
1177 module_exit(fbmem_exit
);
1178 MODULE_LICENSE("GPL");
1179 MODULE_DESCRIPTION("Framebuffer base");
1181 subsys_initcall(fbmem_init
);
1184 int fb_new_modelist(struct fb_info
*info
)
1186 struct fb_event event
;
1187 struct fb_var_screeninfo var
= info
->var
;
1188 struct list_head
*pos
, *n
;
1189 struct fb_modelist
*modelist
;
1190 struct fb_videomode
*m
, mode
;
1193 list_for_each_safe(pos
, n
, &info
->modelist
) {
1194 modelist
= list_entry(pos
, struct fb_modelist
, list
);
1195 m
= &modelist
->mode
;
1196 fb_videomode_to_var(&var
, m
);
1197 var
.activate
= FB_ACTIVATE_TEST
;
1198 err
= fb_set_var(info
, &var
);
1199 fb_var_to_videomode(&mode
, &var
);
1200 if (err
|| !fb_mode_is_equal(m
, &mode
)) {
1208 if (!list_empty(&info
->modelist
)) {
1210 err
= notifier_call_chain(&fb_notifier_list
,
1211 FB_EVENT_NEW_MODELIST
,
1218 static char *video_options
[FB_MAX
];
1221 extern const char *global_mode_option
;
1224 * fb_get_options - get kernel boot parameters
1225 * @name: framebuffer name as it would appear in
1226 * the boot parameter line
1227 * (video=<name>:<options>)
1228 * @option: the option will be stored here
1230 * NOTE: Needed to maintain backwards compatibility
1232 int fb_get_options(char *name
, char **option
)
1234 char *opt
, *options
= NULL
;
1235 int opt_len
, retval
= 0;
1236 int name_len
= strlen(name
), i
;
1238 if (name_len
&& ofonly
&& strncmp(name
, "offb", 4))
1241 if (name_len
&& !retval
) {
1242 for (i
= 0; i
< FB_MAX
; i
++) {
1243 if (video_options
[i
] == NULL
)
1245 opt_len
= strlen(video_options
[i
]);
1248 opt
= video_options
[i
];
1249 if (!strncmp(name
, opt
, name_len
) &&
1250 opt
[name_len
] == ':')
1251 options
= opt
+ name_len
+ 1;
1254 if (options
&& !strncmp(options
, "off", 3))
1264 * video_setup - process command line options
1265 * @options: string of options
1267 * Process command line options for frame buffer subsystem.
1269 * NOTE: This function is a __setup and __init function.
1270 * It only stores the options. Drivers have to call
1271 * fb_get_options() as necessary.
1276 static int __init
video_setup(char *options
)
1280 if (!options
|| !*options
)
1283 if (!global
&& !strncmp(options
, "ofonly", 6)) {
1288 if (!global
&& !strstr(options
, "fb:")) {
1289 global_mode_option
= options
;
1294 for (i
= 0; i
< FB_MAX
; i
++) {
1295 if (video_options
[i
] == NULL
) {
1296 video_options
[i
] = options
;
1305 __setup("video=", video_setup
);
1308 * Visible symbols for modules
1311 EXPORT_SYMBOL(register_framebuffer
);
1312 EXPORT_SYMBOL(unregister_framebuffer
);
1313 EXPORT_SYMBOL(num_registered_fb
);
1314 EXPORT_SYMBOL(registered_fb
);
1315 EXPORT_SYMBOL(fb_prepare_logo
);
1316 EXPORT_SYMBOL(fb_show_logo
);
1317 EXPORT_SYMBOL(fb_set_var
);
1318 EXPORT_SYMBOL(fb_blank
);
1319 EXPORT_SYMBOL(fb_pan_display
);
1320 EXPORT_SYMBOL(fb_get_buffer_offset
);
1321 EXPORT_SYMBOL(fb_set_suspend
);
1322 EXPORT_SYMBOL(fb_register_client
);
1323 EXPORT_SYMBOL(fb_unregister_client
);
1324 EXPORT_SYMBOL(fb_get_options
);
1325 EXPORT_SYMBOL(fb_new_modelist
);
1327 MODULE_LICENSE("GPL");