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/compat.h>
18 #include <linux/types.h>
19 #include <linux/errno.h>
20 #include <linux/sched.h>
21 #include <linux/smp_lock.h>
22 #include <linux/kernel.h>
23 #include <linux/major.h>
24 #include <linux/slab.h>
26 #include <linux/mman.h>
27 #include <linux/tty.h>
28 #include <linux/init.h>
29 #include <linux/linux_logo.h>
30 #include <linux/proc_fs.h>
31 #include <linux/console.h>
33 #include <linux/kmod.h>
35 #include <linux/err.h>
36 #include <linux/device.h>
37 #include <linux/efi.h>
39 #if defined(__mc68000__) || defined(CONFIG_APUS)
40 #include <asm/setup.h>
44 #include <asm/uaccess.h>
46 #include <asm/pgtable.h>
51 * Frame buffer device initialization and setup routines
54 #define FBPIXMAPSIZE (1024 * 8)
56 static BLOCKING_NOTIFIER_HEAD(fb_notifier_list);
57 struct fb_info *registered_fb[FB_MAX];
58 int num_registered_fb;
64 int fb_get_color_depth(struct fb_var_screeninfo *var,
65 struct fb_fix_screeninfo *fix)
69 if (fix->visual == FB_VISUAL_MONO01 ||
70 fix->visual == FB_VISUAL_MONO10)
73 if (var->green.length == var->blue.length &&
74 var->green.length == var->red.length &&
75 var->green.offset == var->blue.offset &&
76 var->green.offset == var->red.offset)
77 depth = var->green.length;
79 depth = var->green.length + var->red.length +
85 EXPORT_SYMBOL(fb_get_color_depth);
88 * Data padding functions.
90 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
92 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
94 EXPORT_SYMBOL(fb_pad_aligned_buffer);
96 void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
97 u32 shift_high, u32 shift_low, u32 mod)
99 u8 mask = (u8) (0xfff << shift_high), tmp;
102 for (i = height; i--; ) {
103 for (j = 0; j < idx; j++) {
106 tmp |= *src >> shift_low;
108 tmp = *src << shift_high;
114 tmp |= *src >> shift_low;
116 if (shift_high < mod) {
117 tmp = *src << shift_high;
124 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
127 * we need to lock this section since fb_cursor
128 * may use fb_imageblit()
130 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
132 u32 align = buf->buf_align - 1, offset;
133 char *addr = buf->addr;
135 /* If IO mapped, we need to sync before access, no sharing of
138 if (buf->flags & FB_PIXMAP_IO) {
139 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
140 info->fbops->fb_sync(info);
144 /* See if we fit in the remaining pixmap space */
145 offset = buf->offset + align;
147 if (offset + size > buf->size) {
148 /* We do not fit. In order to be able to re-use the buffer,
149 * we must ensure no asynchronous DMA'ing or whatever operation
150 * is in progress, we sync for that.
152 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
153 info->fbops->fb_sync(info);
156 buf->offset = offset + size;
164 static inline unsigned safe_shift(unsigned d, int n)
166 return n < 0 ? d >> -n : d << n;
169 static void fb_set_logocmap(struct fb_info *info,
170 const struct linux_logo *logo)
172 struct fb_cmap palette_cmap;
173 u16 palette_green[16];
174 u16 palette_blue[16];
177 const unsigned char *clut = logo->clut;
179 palette_cmap.start = 0;
180 palette_cmap.len = 16;
181 palette_cmap.red = palette_red;
182 palette_cmap.green = palette_green;
183 palette_cmap.blue = palette_blue;
184 palette_cmap.transp = NULL;
186 for (i = 0; i < logo->clutsize; i += n) {
187 n = logo->clutsize - i;
188 /* palette_cmap provides space for only 16 colors at once */
191 palette_cmap.start = 32 + i;
192 palette_cmap.len = n;
193 for (j = 0; j < n; ++j) {
194 palette_cmap.red[j] = clut[0] << 8 | clut[0];
195 palette_cmap.green[j] = clut[1] << 8 | clut[1];
196 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
199 fb_set_cmap(&palette_cmap, info);
203 static void fb_set_logo_truepalette(struct fb_info *info,
204 const struct linux_logo *logo,
207 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
208 unsigned char redmask, greenmask, bluemask;
209 int redshift, greenshift, blueshift;
211 const unsigned char *clut = logo->clut;
214 * We have to create a temporary palette since console palette is only
217 /* Bug: Doesn't obey msb_right ... (who needs that?) */
218 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
219 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
220 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
221 redshift = info->var.red.offset - (8 - info->var.red.length);
222 greenshift = info->var.green.offset - (8 - info->var.green.length);
223 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
225 for ( i = 0; i < logo->clutsize; i++) {
226 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
227 safe_shift((clut[1] & greenmask), greenshift) |
228 safe_shift((clut[2] & bluemask), blueshift));
233 static void fb_set_logo_directpalette(struct fb_info *info,
234 const struct linux_logo *logo,
237 int redshift, greenshift, blueshift;
240 redshift = info->var.red.offset;
241 greenshift = info->var.green.offset;
242 blueshift = info->var.blue.offset;
244 for (i = 32; i < logo->clutsize; i++)
245 palette[i] = i << redshift | i << greenshift | i << blueshift;
248 static void fb_set_logo(struct fb_info *info,
249 const struct linux_logo *logo, u8 *dst,
253 const u8 *src = logo->data;
254 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
257 if (fb_get_color_depth(&info->var, &info->fix) == 3)
260 if (info->fix.visual == FB_VISUAL_MONO01 ||
261 info->fix.visual == FB_VISUAL_MONO10)
262 fg = ~((u8) (0xfff << info->var.green.length));
266 for (i = 0; i < logo->height; i++)
267 for (j = 0; j < logo->width; src++) {
270 if (j < logo->width) {
271 *dst++ = *src & 0x0f;
277 for (i = 0; i < logo->height; i++) {
278 for (j = 0; j < logo->width; src++) {
280 for (k = 7; k >= 0; k--) {
281 *dst++ = ((d >> k) & 1) ? fg : 0;
291 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
292 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
293 * the visual format and color depth of the framebuffer, the DAC, the
294 * pseudo_palette, and the logo data will be adjusted accordingly.
296 * Case 1 - linux_logo_clut224:
297 * Color exceeds the number of console colors (16), thus we set the hardware DAC
298 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
300 * For visuals that require color info from the pseudo_palette, we also construct
301 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
304 * Case 2 - linux_logo_vga16:
305 * The number of colors just matches the console colors, thus there is no need
306 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
307 * each byte contains color information for two pixels (upper and lower nibble).
308 * To be consistent with fb_imageblit() usage, we therefore separate the two
309 * nibbles into separate bytes. The "depth" flag will be set to 4.
311 * Case 3 - linux_logo_mono:
312 * This is similar with Case 2. Each byte contains information for 8 pixels.
313 * We isolate each bit and expand each into a byte. The "depth" flag will
316 static struct logo_data {
318 int needs_directpalette;
319 int needs_truepalette;
321 const struct linux_logo *logo;
324 static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
326 u32 size = width * height, i;
330 for (i = size; i--; )
334 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
336 int i, j, h = height - 1;
338 for (i = 0; i < height; i++)
339 for (j = 0; j < width; j++)
340 out[height * j + h - i] = *in++;
343 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
345 int i, j, w = width - 1;
347 for (i = 0; i < height; i++)
348 for (j = 0; j < width; j++)
349 out[height * (w - j) + i] = *in++;
352 static void fb_rotate_logo(struct fb_info *info, u8 *dst,
353 struct fb_image *image, int rotate)
357 if (rotate == FB_ROTATE_UD) {
358 fb_rotate_logo_ud(image->data, dst, image->width,
360 image->dx = info->var.xres - image->width;
361 image->dy = info->var.yres - image->height;
362 } else if (rotate == FB_ROTATE_CW) {
363 fb_rotate_logo_cw(image->data, dst, image->width,
366 image->width = image->height;
368 image->dx = info->var.xres - image->width;
369 } else if (rotate == FB_ROTATE_CCW) {
370 fb_rotate_logo_ccw(image->data, dst, image->width,
373 image->width = image->height;
375 image->dy = info->var.yres - image->height;
381 static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
386 if (rotate == FB_ROTATE_UR) {
387 for (x = 0; x < num_online_cpus() &&
388 x * (fb_logo.logo->width + 8) <=
389 info->var.xres - fb_logo.logo->width; x++) {
390 info->fbops->fb_imageblit(info, image);
391 image->dx += fb_logo.logo->width + 8;
393 } else if (rotate == FB_ROTATE_UD) {
394 for (x = 0; x < num_online_cpus() &&
395 x * (fb_logo.logo->width + 8) <=
396 info->var.xres - fb_logo.logo->width; x++) {
397 info->fbops->fb_imageblit(info, image);
398 image->dx -= fb_logo.logo->width + 8;
400 } else if (rotate == FB_ROTATE_CW) {
401 for (x = 0; x < num_online_cpus() &&
402 x * (fb_logo.logo->width + 8) <=
403 info->var.yres - fb_logo.logo->width; x++) {
404 info->fbops->fb_imageblit(info, image);
405 image->dy += fb_logo.logo->width + 8;
407 } else if (rotate == FB_ROTATE_CCW) {
408 for (x = 0; x < num_online_cpus() &&
409 x * (fb_logo.logo->width + 8) <=
410 info->var.yres - fb_logo.logo->width; x++) {
411 info->fbops->fb_imageblit(info, image);
412 image->dy -= fb_logo.logo->width + 8;
417 int fb_prepare_logo(struct fb_info *info, int rotate)
419 int depth = fb_get_color_depth(&info->var, &info->fix);
422 memset(&fb_logo, 0, sizeof(struct logo_data));
424 if (info->flags & FBINFO_MISC_TILEBLITTING)
427 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
428 depth = info->var.blue.length;
429 if (info->var.red.length < depth)
430 depth = info->var.red.length;
431 if (info->var.green.length < depth)
432 depth = info->var.green.length;
435 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
436 /* assume console colormap */
441 switch (info->fix.visual) {
442 case FB_VISUAL_TRUECOLOR:
443 fb_logo.needs_truepalette = 1;
445 case FB_VISUAL_DIRECTCOLOR:
446 fb_logo.needs_directpalette = 1;
447 fb_logo.needs_cmapreset = 1;
449 case FB_VISUAL_PSEUDOCOLOR:
450 fb_logo.needs_cmapreset = 1;
455 /* Return if no suitable logo was found */
456 fb_logo.logo = fb_find_logo(depth);
462 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
463 yres = info->var.yres;
465 yres = info->var.xres;
467 if (fb_logo.logo->height > yres) {
472 /* What depth we asked for might be different from what we get */
473 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
475 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
479 return fb_logo.logo->height;
482 int fb_show_logo(struct fb_info *info, int rotate)
484 u32 *palette = NULL, *saved_pseudo_palette = NULL;
485 unsigned char *logo_new = NULL, *logo_rotate = NULL;
486 struct fb_image image;
488 /* Return if the frame buffer is not mapped or suspended */
489 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
493 image.data = fb_logo.logo->data;
495 if (fb_logo.needs_cmapreset)
496 fb_set_logocmap(info, fb_logo.logo);
498 if (fb_logo.needs_truepalette ||
499 fb_logo.needs_directpalette) {
500 palette = kmalloc(256 * 4, GFP_KERNEL);
504 if (fb_logo.needs_truepalette)
505 fb_set_logo_truepalette(info, fb_logo.logo, palette);
507 fb_set_logo_directpalette(info, fb_logo.logo, palette);
509 saved_pseudo_palette = info->pseudo_palette;
510 info->pseudo_palette = palette;
513 if (fb_logo.depth <= 4) {
514 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
516 if (logo_new == NULL) {
518 if (saved_pseudo_palette)
519 info->pseudo_palette = saved_pseudo_palette;
522 image.data = logo_new;
523 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
528 image.width = fb_logo.logo->width;
529 image.height = fb_logo.logo->height;
532 logo_rotate = kmalloc(fb_logo.logo->width *
533 fb_logo.logo->height, GFP_KERNEL);
535 fb_rotate_logo(info, logo_rotate, &image, rotate);
538 fb_do_show_logo(info, &image, rotate);
541 if (saved_pseudo_palette != NULL)
542 info->pseudo_palette = saved_pseudo_palette;
545 return fb_logo.logo->height;
548 int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
549 int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
550 #endif /* CONFIG_LOGO */
552 static int fbmem_read_proc(char *buf, char **start, off_t offset,
553 int len, int *eof, void *private)
559 for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++)
561 clen += sprintf(buf + clen, "%d %s\n",
564 *start = buf + offset;
569 return clen < len ? clen : len;
573 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
575 unsigned long p = *ppos;
576 struct inode *inode = file->f_dentry->d_inode;
577 int fbidx = iminor(inode);
578 struct fb_info *info = registered_fb[fbidx];
581 int c, i, cnt = 0, err = 0;
582 unsigned long total_size;
584 if (!info || ! info->screen_base)
587 if (info->state != FBINFO_STATE_RUNNING)
590 if (info->fbops->fb_read)
591 return info->fbops->fb_read(file, buf, count, ppos);
593 total_size = info->screen_size;
596 total_size = info->fix.smem_len;
601 if (count >= total_size)
604 if (count + p > total_size)
605 count = total_size - p;
607 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
612 src = (u32 __iomem *) (info->screen_base + p);
614 if (info->fbops->fb_sync)
615 info->fbops->fb_sync(info);
618 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
620 for (i = c >> 2; i--; )
621 *dst++ = fb_readl(src++);
623 u8 *dst8 = (u8 *) dst;
624 u8 __iomem *src8 = (u8 __iomem *) src;
626 for (i = c & 3; i--;)
627 *dst8++ = fb_readb(src8++);
629 src = (u32 __iomem *) src8;
632 if (copy_to_user(buf, buffer, c)) {
644 return (err) ? err : cnt;
648 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
650 unsigned long p = *ppos;
651 struct inode *inode = file->f_dentry->d_inode;
652 int fbidx = iminor(inode);
653 struct fb_info *info = registered_fb[fbidx];
656 int c, i, cnt = 0, err = 0;
657 unsigned long total_size;
659 if (!info || !info->screen_base)
662 if (info->state != FBINFO_STATE_RUNNING)
665 if (info->fbops->fb_write)
666 return info->fbops->fb_write(file, buf, count, ppos);
668 total_size = info->screen_size;
671 total_size = info->fix.smem_len;
676 if (count > total_size) {
681 if (count + p > total_size) {
685 count = total_size - p;
688 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
693 dst = (u32 __iomem *) (info->screen_base + p);
695 if (info->fbops->fb_sync)
696 info->fbops->fb_sync(info);
699 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
702 if (copy_from_user(src, buf, c)) {
707 for (i = c >> 2; i--; )
708 fb_writel(*src++, dst++);
711 u8 *src8 = (u8 *) src;
712 u8 __iomem *dst8 = (u8 __iomem *) dst;
714 for (i = c & 3; i--; )
715 fb_writeb(*src8++, dst8++);
717 dst = (u32 __iomem *) dst8;
728 return (cnt) ? cnt : err;
732 static void try_to_load(int fb)
734 request_module("fb%d", fb);
736 #endif /* CONFIG_KMOD */
739 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
741 struct fb_fix_screeninfo *fix = &info->fix;
742 int xoffset = var->xoffset;
743 int yoffset = var->yoffset;
744 int err = 0, yres = info->var.yres;
746 if (var->yoffset > 0) {
747 if (var->vmode & FB_VMODE_YWRAP) {
748 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
752 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
756 if (var->xoffset > 0 && (!fix->xpanstep ||
757 (var->xoffset % fix->xpanstep)))
760 if (err || !info->fbops->fb_pan_display || xoffset < 0 ||
761 yoffset < 0 || var->yoffset + yres > info->var.yres_virtual ||
762 var->xoffset + info->var.xres > info->var.xres_virtual)
765 if ((err = info->fbops->fb_pan_display(var, info)))
767 info->var.xoffset = var->xoffset;
768 info->var.yoffset = var->yoffset;
769 if (var->vmode & FB_VMODE_YWRAP)
770 info->var.vmode |= FB_VMODE_YWRAP;
772 info->var.vmode &= ~FB_VMODE_YWRAP;
777 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
779 int err, flags = info->flags;
781 if (var->activate & FB_ACTIVATE_INV_MODE) {
782 struct fb_videomode mode1, mode2;
785 fb_var_to_videomode(&mode1, var);
786 fb_var_to_videomode(&mode2, &info->var);
787 /* make sure we don't delete the videomode of current var */
788 ret = fb_mode_is_equal(&mode1, &mode2);
791 struct fb_event event;
795 ret = blocking_notifier_call_chain(&fb_notifier_list,
796 FB_EVENT_MODE_DELETE, &event);
800 fb_delete_videomode(&mode1, &info->modelist);
805 if ((var->activate & FB_ACTIVATE_FORCE) ||
806 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
807 if (!info->fbops->fb_check_var) {
812 if ((err = info->fbops->fb_check_var(var, info)))
815 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
816 struct fb_videomode mode;
820 if (info->fbops->fb_set_par)
821 info->fbops->fb_set_par(info);
823 fb_pan_display(info, &info->var);
825 fb_set_cmap(&info->cmap, info);
827 fb_var_to_videomode(&mode, &info->var);
829 if (info->modelist.prev && info->modelist.next &&
830 !list_empty(&info->modelist))
831 err = fb_add_videomode(&mode, &info->modelist);
833 if (!err && (flags & FBINFO_MISC_USEREVENT)) {
834 struct fb_event event;
835 int evnt = (var->activate & FB_ACTIVATE_ALL) ?
836 FB_EVENT_MODE_CHANGE_ALL :
837 FB_EVENT_MODE_CHANGE;
839 info->flags &= ~FBINFO_MISC_USEREVENT;
841 blocking_notifier_call_chain(&fb_notifier_list,
850 fb_blank(struct fb_info *info, int blank)
854 if (blank > FB_BLANK_POWERDOWN)
855 blank = FB_BLANK_POWERDOWN;
857 if (info->fbops->fb_blank)
858 ret = info->fbops->fb_blank(blank, info);
861 struct fb_event event;
865 blocking_notifier_call_chain(&fb_notifier_list,
866 FB_EVENT_BLANK, &event);
873 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
876 int fbidx = iminor(inode);
877 struct fb_info *info = registered_fb[fbidx];
878 struct fb_ops *fb = info->fbops;
879 struct fb_var_screeninfo var;
880 struct fb_fix_screeninfo fix;
881 struct fb_con2fbmap con2fb;
882 struct fb_cmap_user cmap;
883 struct fb_event event;
884 void __user *argp = (void __user *)arg;
890 case FBIOGET_VSCREENINFO:
891 return copy_to_user(argp, &info->var,
892 sizeof(var)) ? -EFAULT : 0;
893 case FBIOPUT_VSCREENINFO:
894 if (copy_from_user(&var, argp, sizeof(var)))
896 acquire_console_sem();
897 info->flags |= FBINFO_MISC_USEREVENT;
898 i = fb_set_var(info, &var);
899 info->flags &= ~FBINFO_MISC_USEREVENT;
900 release_console_sem();
902 if (copy_to_user(argp, &var, sizeof(var)))
905 case FBIOGET_FSCREENINFO:
906 return copy_to_user(argp, &info->fix,
907 sizeof(fix)) ? -EFAULT : 0;
909 if (copy_from_user(&cmap, argp, sizeof(cmap)))
911 return (fb_set_user_cmap(&cmap, info));
913 if (copy_from_user(&cmap, argp, sizeof(cmap)))
915 return fb_cmap_to_user(&info->cmap, &cmap);
916 case FBIOPAN_DISPLAY:
917 if (copy_from_user(&var, argp, sizeof(var)))
919 acquire_console_sem();
920 i = fb_pan_display(info, &var);
921 release_console_sem();
924 if (copy_to_user(argp, &var, sizeof(var)))
929 case FBIOGET_CON2FBMAP:
930 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
932 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
934 con2fb.framebuffer = -1;
936 event.data = &con2fb;
937 blocking_notifier_call_chain(&fb_notifier_list,
938 FB_EVENT_GET_CONSOLE_MAP, &event);
939 return copy_to_user(argp, &con2fb,
940 sizeof(con2fb)) ? -EFAULT : 0;
941 case FBIOPUT_CON2FBMAP:
942 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
944 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
946 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
949 if (!registered_fb[con2fb.framebuffer])
950 try_to_load(con2fb.framebuffer);
951 #endif /* CONFIG_KMOD */
952 if (!registered_fb[con2fb.framebuffer])
955 event.data = &con2fb;
956 return blocking_notifier_call_chain(&fb_notifier_list,
957 FB_EVENT_SET_CONSOLE_MAP,
960 acquire_console_sem();
961 info->flags |= FBINFO_MISC_USEREVENT;
962 i = fb_blank(info, arg);
963 info->flags &= ~FBINFO_MISC_USEREVENT;
964 release_console_sem();
967 if (fb->fb_ioctl == NULL)
969 return fb->fb_ioctl(info, cmd, arg);
974 struct fb_fix_screeninfo32 {
976 compat_caddr_t smem_start;
985 compat_caddr_t mmio_start;
995 compat_caddr_t green;
997 compat_caddr_t transp;
1000 static int fb_getput_cmap(struct inode *inode, struct file *file,
1001 unsigned int cmd, unsigned long arg)
1003 struct fb_cmap_user __user *cmap;
1004 struct fb_cmap32 __user *cmap32;
1008 cmap = compat_alloc_user_space(sizeof(*cmap));
1009 cmap32 = compat_ptr(arg);
1011 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1014 if (get_user(data, &cmap32->red) ||
1015 put_user(compat_ptr(data), &cmap->red) ||
1016 get_user(data, &cmap32->green) ||
1017 put_user(compat_ptr(data), &cmap->green) ||
1018 get_user(data, &cmap32->blue) ||
1019 put_user(compat_ptr(data), &cmap->blue) ||
1020 get_user(data, &cmap32->transp) ||
1021 put_user(compat_ptr(data), &cmap->transp))
1024 err = fb_ioctl(inode, file, cmd, (unsigned long) cmap);
1027 if (copy_in_user(&cmap32->start,
1035 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1036 struct fb_fix_screeninfo32 __user *fix32)
1041 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1043 data = (__u32) (unsigned long) fix->smem_start;
1044 err |= put_user(data, &fix32->smem_start);
1046 err |= put_user(fix->smem_len, &fix32->smem_len);
1047 err |= put_user(fix->type, &fix32->type);
1048 err |= put_user(fix->type_aux, &fix32->type_aux);
1049 err |= put_user(fix->visual, &fix32->visual);
1050 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1051 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1052 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1053 err |= put_user(fix->line_length, &fix32->line_length);
1055 data = (__u32) (unsigned long) fix->mmio_start;
1056 err |= put_user(data, &fix32->mmio_start);
1058 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1059 err |= put_user(fix->accel, &fix32->accel);
1060 err |= copy_to_user(fix32->reserved, fix->reserved,
1061 sizeof(fix->reserved));
1066 static int fb_get_fscreeninfo(struct inode *inode, struct file *file,
1067 unsigned int cmd, unsigned long arg)
1069 mm_segment_t old_fs;
1070 struct fb_fix_screeninfo fix;
1071 struct fb_fix_screeninfo32 __user *fix32;
1074 fix32 = compat_ptr(arg);
1078 err = fb_ioctl(inode, file, cmd, (unsigned long) &fix);
1082 err = do_fscreeninfo_to_user(&fix, fix32);
1088 fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1090 struct inode *inode = file->f_dentry->d_inode;
1091 int fbidx = iminor(inode);
1092 struct fb_info *info = registered_fb[fbidx];
1093 struct fb_ops *fb = info->fbops;
1094 long ret = -ENOIOCTLCMD;
1098 case FBIOGET_VSCREENINFO:
1099 case FBIOPUT_VSCREENINFO:
1100 case FBIOPAN_DISPLAY:
1101 case FBIOGET_CON2FBMAP:
1102 case FBIOPUT_CON2FBMAP:
1103 arg = (unsigned long) compat_ptr(arg);
1105 ret = fb_ioctl(inode, file, cmd, arg);
1108 case FBIOGET_FSCREENINFO:
1109 ret = fb_get_fscreeninfo(inode, file, cmd, arg);
1114 ret = fb_getput_cmap(inode, file, cmd, arg);
1118 if (fb->fb_compat_ioctl)
1119 ret = fb->fb_compat_ioctl(info, cmd, arg);
1128 fb_mmap(struct file *file, struct vm_area_struct * vma)
1130 int fbidx = iminor(file->f_dentry->d_inode);
1131 struct fb_info *info = registered_fb[fbidx];
1132 struct fb_ops *fb = info->fbops;
1134 #if !defined(__sparc__) || defined(__sparc_v9__)
1135 unsigned long start;
1139 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1141 off = vma->vm_pgoff << PAGE_SHIFT;
1147 res = fb->fb_mmap(info, vma);
1152 #if defined(__sparc__) && !defined(__sparc_v9__)
1153 /* Should never get here, all fb drivers should have their own
1160 /* frame buffer memory */
1161 start = info->fix.smem_start;
1162 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1164 /* memory mapped io */
1166 if (info->var.accel_flags) {
1170 start = info->fix.mmio_start;
1171 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1175 if ((vma->vm_end - vma->vm_start + off) > len)
1178 vma->vm_pgoff = off >> PAGE_SHIFT;
1179 /* This is an IO map - tell maydump to skip this VMA */
1180 vma->vm_flags |= VM_IO | VM_RESERVED;
1181 #if defined(__mc68000__)
1182 #if defined(CONFIG_SUN3)
1183 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1184 #elif defined(CONFIG_MMU)
1185 if (CPU_IS_020_OR_030)
1186 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1187 if (CPU_IS_040_OR_060) {
1188 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1189 /* Use no-cache mode, serialized */
1190 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1193 #elif defined(__powerpc__)
1194 vma->vm_page_prot = phys_mem_access_prot(file, off >> PAGE_SHIFT,
1195 vma->vm_end - vma->vm_start,
1197 #elif defined(__alpha__)
1198 /* Caching is off in the I/O space quadrant by design. */
1199 #elif defined(__i386__) || defined(__x86_64__)
1200 if (boot_cpu_data.x86 > 3)
1201 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1202 #elif defined(__mips__) || defined(__sparc_v9__)
1203 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1204 #elif defined(__hppa__)
1205 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1206 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
1207 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1208 #elif defined(__ia64__)
1209 if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
1210 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1212 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1214 #warning What do we have to do here??
1216 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1217 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1220 #endif /* !sparc32 */
1224 fb_open(struct inode *inode, struct file *file)
1226 int fbidx = iminor(inode);
1227 struct fb_info *info;
1230 if (fbidx >= FB_MAX)
1233 if (!(info = registered_fb[fbidx]))
1235 #endif /* CONFIG_KMOD */
1236 if (!(info = registered_fb[fbidx]))
1238 if (!try_module_get(info->fbops->owner))
1240 file->private_data = info;
1241 if (info->fbops->fb_open) {
1242 res = info->fbops->fb_open(info,1);
1244 module_put(info->fbops->owner);
1250 fb_release(struct inode *inode, struct file *file)
1252 struct fb_info * const info = file->private_data;
1255 if (info->fbops->fb_release)
1256 info->fbops->fb_release(info,1);
1257 module_put(info->fbops->owner);
1262 static struct file_operations fb_fops = {
1263 .owner = THIS_MODULE,
1267 #ifdef CONFIG_COMPAT
1268 .compat_ioctl = fb_compat_ioctl,
1272 .release = fb_release,
1273 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1274 .get_unmapped_area = get_fb_unmapped_area,
1278 struct class *fb_class;
1279 EXPORT_SYMBOL(fb_class);
1281 * register_framebuffer - registers a frame buffer device
1282 * @fb_info: frame buffer info structure
1284 * Registers a frame buffer device @fb_info.
1286 * Returns negative errno on error, or zero for success.
1291 register_framebuffer(struct fb_info *fb_info)
1294 struct fb_event event;
1295 struct fb_videomode mode;
1297 if (num_registered_fb == FB_MAX)
1299 num_registered_fb++;
1300 for (i = 0 ; i < FB_MAX; i++)
1301 if (!registered_fb[i])
1305 fb_info->class_device = class_device_create(fb_class, NULL, MKDEV(FB_MAJOR, i),
1306 fb_info->device, "fb%d", i);
1307 if (IS_ERR(fb_info->class_device)) {
1309 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device));
1310 fb_info->class_device = NULL;
1312 fb_init_class_device(fb_info);
1314 if (fb_info->pixmap.addr == NULL) {
1315 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1316 if (fb_info->pixmap.addr) {
1317 fb_info->pixmap.size = FBPIXMAPSIZE;
1318 fb_info->pixmap.buf_align = 1;
1319 fb_info->pixmap.scan_align = 1;
1320 fb_info->pixmap.access_align = 32;
1321 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1324 fb_info->pixmap.offset = 0;
1326 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1327 INIT_LIST_HEAD(&fb_info->modelist);
1329 fb_var_to_videomode(&mode, &fb_info->var);
1330 fb_add_videomode(&mode, &fb_info->modelist);
1331 registered_fb[i] = fb_info;
1333 event.info = fb_info;
1334 blocking_notifier_call_chain(&fb_notifier_list,
1335 FB_EVENT_FB_REGISTERED, &event);
1341 * unregister_framebuffer - releases a frame buffer device
1342 * @fb_info: frame buffer info structure
1344 * Unregisters a frame buffer device @fb_info.
1346 * Returns negative errno on error, or zero for success.
1351 unregister_framebuffer(struct fb_info *fb_info)
1353 struct fb_event event;
1357 if (!registered_fb[i])
1360 if (fb_info->pixmap.addr &&
1361 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1362 kfree(fb_info->pixmap.addr);
1363 fb_destroy_modelist(&fb_info->modelist);
1364 registered_fb[i]=NULL;
1365 num_registered_fb--;
1366 fb_cleanup_class_device(fb_info);
1367 class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1368 event.info = fb_info;
1369 blocking_notifier_call_chain(&fb_notifier_list,
1370 FB_EVENT_FB_UNREGISTERED, &event);
1375 * fb_register_client - register a client notifier
1376 * @nb: notifier block to callback on events
1378 int fb_register_client(struct notifier_block *nb)
1380 return blocking_notifier_chain_register(&fb_notifier_list, nb);
1384 * fb_unregister_client - unregister a client notifier
1385 * @nb: notifier block to callback on events
1387 int fb_unregister_client(struct notifier_block *nb)
1389 return blocking_notifier_chain_unregister(&fb_notifier_list, nb);
1393 * fb_set_suspend - low level driver signals suspend
1394 * @info: framebuffer affected
1395 * @state: 0 = resuming, !=0 = suspending
1397 * This is meant to be used by low level drivers to
1398 * signal suspend/resume to the core & clients.
1399 * It must be called with the console semaphore held
1401 void fb_set_suspend(struct fb_info *info, int state)
1403 struct fb_event event;
1407 blocking_notifier_call_chain(&fb_notifier_list,
1408 FB_EVENT_SUSPEND, &event);
1409 info->state = FBINFO_STATE_SUSPENDED;
1411 info->state = FBINFO_STATE_RUNNING;
1412 blocking_notifier_call_chain(&fb_notifier_list,
1413 FB_EVENT_RESUME, &event);
1418 * fbmem_init - init frame buffer subsystem
1420 * Initialize the frame buffer subsystem.
1422 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1429 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1431 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1432 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1434 fb_class = class_create(THIS_MODULE, "graphics");
1435 if (IS_ERR(fb_class)) {
1436 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1443 module_init(fbmem_init);
1447 class_destroy(fb_class);
1448 unregister_chrdev(FB_MAJOR, "fb");
1451 module_exit(fbmem_exit);
1452 MODULE_LICENSE("GPL");
1453 MODULE_DESCRIPTION("Framebuffer base");
1455 subsys_initcall(fbmem_init);
1458 int fb_new_modelist(struct fb_info *info)
1460 struct fb_event event;
1461 struct fb_var_screeninfo var = info->var;
1462 struct list_head *pos, *n;
1463 struct fb_modelist *modelist;
1464 struct fb_videomode *m, mode;
1467 list_for_each_safe(pos, n, &info->modelist) {
1468 modelist = list_entry(pos, struct fb_modelist, list);
1469 m = &modelist->mode;
1470 fb_videomode_to_var(&var, m);
1471 var.activate = FB_ACTIVATE_TEST;
1472 err = fb_set_var(info, &var);
1473 fb_var_to_videomode(&mode, &var);
1474 if (err || !fb_mode_is_equal(m, &mode)) {
1482 if (!list_empty(&info->modelist)) {
1484 err = blocking_notifier_call_chain(&fb_notifier_list,
1485 FB_EVENT_NEW_MODELIST,
1492 static char *video_options[FB_MAX];
1495 extern const char *global_mode_option;
1498 * fb_get_options - get kernel boot parameters
1499 * @name: framebuffer name as it would appear in
1500 * the boot parameter line
1501 * (video=<name>:<options>)
1502 * @option: the option will be stored here
1504 * NOTE: Needed to maintain backwards compatibility
1506 int fb_get_options(char *name, char **option)
1508 char *opt, *options = NULL;
1509 int opt_len, retval = 0;
1510 int name_len = strlen(name), i;
1512 if (name_len && ofonly && strncmp(name, "offb", 4))
1515 if (name_len && !retval) {
1516 for (i = 0; i < FB_MAX; i++) {
1517 if (video_options[i] == NULL)
1519 opt_len = strlen(video_options[i]);
1522 opt = video_options[i];
1523 if (!strncmp(name, opt, name_len) &&
1524 opt[name_len] == ':')
1525 options = opt + name_len + 1;
1528 if (options && !strncmp(options, "off", 3))
1539 * video_setup - process command line options
1540 * @options: string of options
1542 * Process command line options for frame buffer subsystem.
1544 * NOTE: This function is a __setup and __init function.
1545 * It only stores the options. Drivers have to call
1546 * fb_get_options() as necessary.
1551 static int __init video_setup(char *options)
1555 if (!options || !*options)
1558 if (!global && !strncmp(options, "ofonly", 6)) {
1563 if (!global && !strstr(options, "fb:")) {
1564 global_mode_option = options;
1569 for (i = 0; i < FB_MAX; i++) {
1570 if (video_options[i] == NULL) {
1571 video_options[i] = options;
1580 __setup("video=", video_setup);
1584 * Visible symbols for modules
1587 EXPORT_SYMBOL(register_framebuffer);
1588 EXPORT_SYMBOL(unregister_framebuffer);
1589 EXPORT_SYMBOL(num_registered_fb);
1590 EXPORT_SYMBOL(registered_fb);
1591 EXPORT_SYMBOL(fb_prepare_logo);
1592 EXPORT_SYMBOL(fb_show_logo);
1593 EXPORT_SYMBOL(fb_set_var);
1594 EXPORT_SYMBOL(fb_blank);
1595 EXPORT_SYMBOL(fb_pan_display);
1596 EXPORT_SYMBOL(fb_get_buffer_offset);
1597 EXPORT_SYMBOL(fb_set_suspend);
1598 EXPORT_SYMBOL(fb_register_client);
1599 EXPORT_SYMBOL(fb_unregister_client);
1600 EXPORT_SYMBOL(fb_get_options);
1602 MODULE_LICENSE("GPL");