2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
14 #include <linux/module.h>
16 #include <linux/compat.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/major.h>
21 #include <linux/slab.h>
23 #include <linux/mman.h>
25 #include <linux/init.h>
26 #include <linux/linux_logo.h>
27 #include <linux/proc_fs.h>
28 #include <linux/seq_file.h>
29 #include <linux/console.h>
30 #include <linux/kmod.h>
31 #include <linux/err.h>
32 #include <linux/device.h>
33 #include <linux/efi.h>
40 * Frame buffer device initialization and setup routines
43 #define FBPIXMAPSIZE (1024 * 8)
45 struct fb_info *registered_fb[FB_MAX] __read_mostly;
46 int num_registered_fb __read_mostly;
48 int lock_fb_info(struct fb_info *info)
50 mutex_lock(&info->lock);
52 mutex_unlock(&info->lock);
57 EXPORT_SYMBOL(lock_fb_info);
63 int fb_get_color_depth(struct fb_var_screeninfo *var,
64 struct fb_fix_screeninfo *fix)
68 if (fix->visual == FB_VISUAL_MONO01 ||
69 fix->visual == FB_VISUAL_MONO10)
72 if (var->green.length == var->blue.length &&
73 var->green.length == var->red.length &&
74 var->green.offset == var->blue.offset &&
75 var->green.offset == var->red.offset)
76 depth = var->green.length;
78 depth = var->green.length + var->red.length +
84 EXPORT_SYMBOL(fb_get_color_depth);
87 * Data padding functions.
89 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
91 __fb_pad_aligned_buffer(dst, d_pitch, src, s_pitch, height);
93 EXPORT_SYMBOL(fb_pad_aligned_buffer);
95 void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
96 u32 shift_high, u32 shift_low, u32 mod)
98 u8 mask = (u8) (0xfff << shift_high), tmp;
101 for (i = height; i--; ) {
102 for (j = 0; j < idx; j++) {
105 tmp |= *src >> shift_low;
107 tmp = *src << shift_high;
113 tmp |= *src >> shift_low;
115 if (shift_high < mod) {
116 tmp = *src << shift_high;
123 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
126 * we need to lock this section since fb_cursor
127 * may use fb_imageblit()
129 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
131 u32 align = buf->buf_align - 1, offset;
132 char *addr = buf->addr;
134 /* If IO mapped, we need to sync before access, no sharing of
137 if (buf->flags & FB_PIXMAP_IO) {
138 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
139 info->fbops->fb_sync(info);
143 /* See if we fit in the remaining pixmap space */
144 offset = buf->offset + align;
146 if (offset + size > buf->size) {
147 /* We do not fit. In order to be able to re-use the buffer,
148 * we must ensure no asynchronous DMA'ing or whatever operation
149 * is in progress, we sync for that.
151 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
152 info->fbops->fb_sync(info);
155 buf->offset = offset + size;
163 static inline unsigned safe_shift(unsigned d, int n)
165 return n < 0 ? d >> -n : d << n;
168 static void fb_set_logocmap(struct fb_info *info,
169 const struct linux_logo *logo)
171 struct fb_cmap palette_cmap;
172 u16 palette_green[16];
173 u16 palette_blue[16];
176 const unsigned char *clut = logo->clut;
178 palette_cmap.start = 0;
179 palette_cmap.len = 16;
180 palette_cmap.red = palette_red;
181 palette_cmap.green = palette_green;
182 palette_cmap.blue = palette_blue;
183 palette_cmap.transp = NULL;
185 for (i = 0; i < logo->clutsize; i += n) {
186 n = logo->clutsize - i;
187 /* palette_cmap provides space for only 16 colors at once */
190 palette_cmap.start = 32 + i;
191 palette_cmap.len = n;
192 for (j = 0; j < n; ++j) {
193 palette_cmap.red[j] = clut[0] << 8 | clut[0];
194 palette_cmap.green[j] = clut[1] << 8 | clut[1];
195 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
198 fb_set_cmap(&palette_cmap, info);
202 static void fb_set_logo_truepalette(struct fb_info *info,
203 const struct linux_logo *logo,
206 static const unsigned char mask[] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
207 unsigned char redmask, greenmask, bluemask;
208 int redshift, greenshift, blueshift;
210 const unsigned char *clut = logo->clut;
213 * We have to create a temporary palette since console palette is only
216 /* Bug: Doesn't obey msb_right ... (who needs that?) */
217 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
218 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
219 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
220 redshift = info->var.red.offset - (8 - info->var.red.length);
221 greenshift = info->var.green.offset - (8 - info->var.green.length);
222 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
224 for ( i = 0; i < logo->clutsize; i++) {
225 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
226 safe_shift((clut[1] & greenmask), greenshift) |
227 safe_shift((clut[2] & bluemask), blueshift));
232 static void fb_set_logo_directpalette(struct fb_info *info,
233 const struct linux_logo *logo,
236 int redshift, greenshift, blueshift;
239 redshift = info->var.red.offset;
240 greenshift = info->var.green.offset;
241 blueshift = info->var.blue.offset;
243 for (i = 32; i < 32 + logo->clutsize; i++)
244 palette[i] = i << redshift | i << greenshift | i << blueshift;
247 static void fb_set_logo(struct fb_info *info,
248 const struct linux_logo *logo, u8 *dst,
252 const u8 *src = logo->data;
253 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
256 switch (fb_get_color_depth(&info->var, &info->fix)) {
268 if (info->fix.visual == FB_VISUAL_MONO01 ||
269 info->fix.visual == FB_VISUAL_MONO10)
270 fg = ~((u8) (0xfff << info->var.green.length));
274 for (i = 0; i < logo->height; i++)
275 for (j = 0; j < logo->width; src++) {
278 if (j < logo->width) {
279 *dst++ = *src & 0x0f;
285 for (i = 0; i < logo->height; i++) {
286 for (j = 0; j < logo->width; src++) {
288 for (k = 7; k >= 0; k--) {
289 *dst++ = ((d >> k) & 1) ? fg : 0;
299 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
300 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
301 * the visual format and color depth of the framebuffer, the DAC, the
302 * pseudo_palette, and the logo data will be adjusted accordingly.
304 * Case 1 - linux_logo_clut224:
305 * Color exceeds the number of console colors (16), thus we set the hardware DAC
306 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
308 * For visuals that require color info from the pseudo_palette, we also construct
309 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
312 * Case 2 - linux_logo_vga16:
313 * The number of colors just matches the console colors, thus there is no need
314 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
315 * each byte contains color information for two pixels (upper and lower nibble).
316 * To be consistent with fb_imageblit() usage, we therefore separate the two
317 * nibbles into separate bytes. The "depth" flag will be set to 4.
319 * Case 3 - linux_logo_mono:
320 * This is similar with Case 2. Each byte contains information for 8 pixels.
321 * We isolate each bit and expand each into a byte. The "depth" flag will
324 static struct logo_data {
326 int needs_directpalette;
327 int needs_truepalette;
329 const struct linux_logo *logo;
330 } fb_logo __read_mostly;
332 void fb_show_charge_logo(struct linux_logo *logo)
338 static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
340 u32 size = width * height, i;
344 for (i = size; i--; )
348 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
350 int i, j, h = height - 1;
352 for (i = 0; i < height; i++)
353 for (j = 0; j < width; j++)
354 out[height * j + h - i] = *in++;
357 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
359 int i, j, w = width - 1;
361 for (i = 0; i < height; i++)
362 for (j = 0; j < width; j++)
363 out[height * (w - j) + i] = *in++;
366 static void fb_rotate_logo(struct fb_info *info, u8 *dst,
367 struct fb_image *image, int rotate)
371 if (rotate == FB_ROTATE_UD) {
372 fb_rotate_logo_ud(image->data, dst, image->width,
374 image->dx = info->var.xres - image->width - image->dx;
375 image->dy = info->var.yres - image->height - image->dy;
376 } else if (rotate == FB_ROTATE_CW) {
377 fb_rotate_logo_cw(image->data, dst, image->width,
380 image->width = image->height;
383 image->dy = image->dx;
384 image->dx = info->var.xres - image->width - tmp;
385 } else if (rotate == FB_ROTATE_CCW) {
386 fb_rotate_logo_ccw(image->data, dst, image->width,
389 image->width = image->height;
392 image->dx = image->dy;
393 image->dy = info->var.yres - image->height - tmp;
399 static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
400 int rotate, unsigned int num)
404 if (rotate == FB_ROTATE_UR) {
406 x < num && image->dx + image->width <= info->var.xres;
408 info->fbops->fb_imageblit(info, image);
409 image->dx += image->width + 8;
411 } else if (rotate == FB_ROTATE_UD) {
412 for (x = 0; x < num && image->dx >= 0; x++) {
413 info->fbops->fb_imageblit(info, image);
414 image->dx -= image->width + 8;
416 } else if (rotate == FB_ROTATE_CW) {
418 x < num && image->dy + image->height <= info->var.yres;
420 info->fbops->fb_imageblit(info, image);
421 image->dy += image->height + 8;
423 } else if (rotate == FB_ROTATE_CCW) {
424 for (x = 0; x < num && image->dy >= 0; x++) {
425 info->fbops->fb_imageblit(info, image);
426 image->dy -= image->height + 8;
431 static int fb_show_logo_line(struct fb_info *info, int rotate,
432 const struct linux_logo *logo, int y,
435 u32 *palette = NULL, *saved_pseudo_palette = NULL;
436 unsigned char *logo_new = NULL, *logo_rotate = NULL;
437 struct fb_image image;
439 /* Return if the frame buffer is not mapped or suspended */
440 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
441 info->flags & FBINFO_MODULE)
445 image.data = logo->data;
447 if (fb_logo.needs_cmapreset)
448 fb_set_logocmap(info, logo);
450 if (fb_logo.needs_truepalette ||
451 fb_logo.needs_directpalette) {
452 palette = kmalloc(256 * 4, GFP_KERNEL);
456 if (fb_logo.needs_truepalette)
457 fb_set_logo_truepalette(info, logo, palette);
459 fb_set_logo_directpalette(info, logo, palette);
461 saved_pseudo_palette = info->pseudo_palette;
462 info->pseudo_palette = palette;
465 if (fb_logo.depth <= 4) {
466 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
467 if (logo_new == NULL) {
469 if (saved_pseudo_palette)
470 info->pseudo_palette = saved_pseudo_palette;
473 image.data = logo_new;
474 fb_set_logo(info, logo, logo_new, fb_logo.depth);
479 image.width = logo->width;
480 image.height = logo->height;
483 logo_rotate = kmalloc(logo->width *
484 logo->height, GFP_KERNEL);
486 fb_rotate_logo(info, logo_rotate, &image, rotate);
489 fb_do_show_logo(info, &image, rotate, n);
492 if (saved_pseudo_palette != NULL)
493 info->pseudo_palette = saved_pseudo_palette;
500 #ifdef CONFIG_FB_LOGO_EXTRA
502 #define FB_LOGO_EX_NUM_MAX 10
503 static struct logo_data_extra {
504 const struct linux_logo *logo;
506 } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
507 static unsigned int fb_logo_ex_num;
509 void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
511 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
514 fb_logo_ex[fb_logo_ex_num].logo = logo;
515 fb_logo_ex[fb_logo_ex_num].n = n;
519 static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
524 /* FIXME: logo_ex supports only truecolor fb. */
525 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
528 for (i = 0; i < fb_logo_ex_num; i++) {
529 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
530 fb_logo_ex[i].logo = NULL;
533 height += fb_logo_ex[i].logo->height;
535 height -= fb_logo_ex[i].logo->height;
543 static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
547 for (i = 0; i < fb_logo_ex_num; i++)
548 y += fb_show_logo_line(info, rotate,
549 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
554 #else /* !CONFIG_FB_LOGO_EXTRA */
556 static inline int fb_prepare_extra_logos(struct fb_info *info,
563 static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
568 #endif /* CONFIG_FB_LOGO_EXTRA */
571 int fb_prepare_logo(struct fb_info *info, int rotate)
573 int depth = fb_get_color_depth(&info->var, &info->fix);
576 memset(&fb_logo, 0, sizeof(struct logo_data));
578 if (info->flags & FBINFO_MISC_TILEBLITTING ||
579 info->flags & FBINFO_MODULE)
582 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
583 depth = info->var.blue.length;
584 if (info->var.red.length < depth)
585 depth = info->var.red.length;
586 if (info->var.green.length < depth)
587 depth = info->var.green.length;
590 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
591 /* assume console colormap */
595 /* Return if no suitable logo was found */
596 fb_logo.logo = fb_find_logo(depth);
602 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
603 yres = info->var.yres;
605 yres = info->var.xres;
607 if (fb_logo.logo->height > yres) {
612 /* What depth we asked for might be different from what we get */
613 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
615 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
621 if (fb_logo.depth > 4 && depth > 4) {
622 switch (info->fix.visual) {
623 case FB_VISUAL_TRUECOLOR:
624 fb_logo.needs_truepalette = 1;
626 case FB_VISUAL_DIRECTCOLOR:
627 fb_logo.needs_directpalette = 1;
628 fb_logo.needs_cmapreset = 1;
630 case FB_VISUAL_PSEUDOCOLOR:
631 fb_logo.needs_cmapreset = 1;
636 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
639 int fb_show_logo(struct fb_info *info, int rotate)
643 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
645 y = fb_show_extra_logos(info, y, rotate);
650 int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
651 int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
652 #endif /* CONFIG_LOGO */
654 static void *fb_seq_start(struct seq_file *m, loff_t *pos)
656 return (*pos < FB_MAX) ? pos : NULL;
659 static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
662 return (*pos < FB_MAX) ? pos : NULL;
665 static void fb_seq_stop(struct seq_file *m, void *v)
669 static int fb_seq_show(struct seq_file *m, void *v)
671 int i = *(loff_t *)v;
672 struct fb_info *fi = registered_fb[i];
675 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
679 static const struct seq_operations proc_fb_seq_ops = {
680 .start = fb_seq_start,
686 static int proc_fb_open(struct inode *inode, struct file *file)
688 return seq_open(file, &proc_fb_seq_ops);
691 static const struct file_operations fb_proc_fops = {
692 .owner = THIS_MODULE,
693 .open = proc_fb_open,
696 .release = seq_release,
700 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
702 unsigned long p = *ppos;
703 struct inode *inode = file->f_path.dentry->d_inode;
704 int fbidx = iminor(inode);
705 struct fb_info *info = registered_fb[fbidx];
708 int c, i, cnt = 0, err = 0;
709 unsigned long total_size;
711 if (!info || ! info->screen_base)
714 if (info->state != FBINFO_STATE_RUNNING)
717 if (info->fbops->fb_read)
718 return info->fbops->fb_read(info, buf, count, ppos);
720 total_size = info->screen_size;
723 total_size = info->fix.smem_len;
728 if (count >= total_size)
731 if (count + p > total_size)
732 count = total_size - p;
734 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
739 src = (u32 __iomem *) (info->screen_base + p);
741 if (info->fbops->fb_sync)
742 info->fbops->fb_sync(info);
745 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
747 for (i = c >> 2; i--; )
748 *dst++ = fb_readl(src++);
750 u8 *dst8 = (u8 *) dst;
751 u8 __iomem *src8 = (u8 __iomem *) src;
753 for (i = c & 3; i--;)
754 *dst8++ = fb_readb(src8++);
756 src = (u32 __iomem *) src8;
759 if (copy_to_user(buf, buffer, c)) {
771 return (err) ? err : cnt;
775 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
777 unsigned long p = *ppos;
778 struct inode *inode = file->f_path.dentry->d_inode;
779 int fbidx = iminor(inode);
780 struct fb_info *info = registered_fb[fbidx];
783 int c, i, cnt = 0, err = 0;
784 unsigned long total_size;
786 if (!info || !info->screen_base)
789 if (info->state != FBINFO_STATE_RUNNING)
792 if (info->fbops->fb_write)
793 return info->fbops->fb_write(info, buf, count, ppos);
795 total_size = info->screen_size;
798 total_size = info->fix.smem_len;
803 if (count > total_size) {
808 if (count + p > total_size) {
812 count = total_size - p;
815 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
820 dst = (u32 __iomem *) (info->screen_base + p);
822 if (info->fbops->fb_sync)
823 info->fbops->fb_sync(info);
826 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
829 if (copy_from_user(src, buf, c)) {
834 for (i = c >> 2; i--; )
835 fb_writel(*src++, dst++);
838 u8 *src8 = (u8 *) src;
839 u8 __iomem *dst8 = (u8 __iomem *) dst;
841 for (i = c & 3; i--; )
842 fb_writeb(*src8++, dst8++);
844 dst = (u32 __iomem *) dst8;
855 return (cnt) ? cnt : err;
859 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
861 struct fb_fix_screeninfo *fix = &info->fix;
862 unsigned int yres = info->var.yres;
865 if (var->yoffset > 0) {
866 if (var->vmode & FB_VMODE_YWRAP) {
867 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
871 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
875 if (var->xoffset > 0 && (!fix->xpanstep ||
876 (var->xoffset % fix->xpanstep)))
879 if (err || !info->fbops->fb_pan_display ||
880 var->yoffset > info->var.yres_virtual - yres ||
881 var->xoffset > info->var.xres_virtual - info->var.xres)
884 if ((err = info->fbops->fb_pan_display(var, info)))
886 info->var.xoffset = var->xoffset;
887 info->var.yoffset = var->yoffset;
888 if (var->vmode & FB_VMODE_YWRAP)
889 info->var.vmode |= FB_VMODE_YWRAP;
891 info->var.vmode &= ~FB_VMODE_YWRAP;
895 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
898 struct fb_event event;
899 struct fb_blit_caps caps, fbcaps;
902 memset(&caps, 0, sizeof(caps));
903 memset(&fbcaps, 0, sizeof(fbcaps));
904 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
907 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
908 info->fbops->fb_get_caps(info, &fbcaps, var);
910 if (((fbcaps.x ^ caps.x) & caps.x) ||
911 ((fbcaps.y ^ caps.y) & caps.y) ||
912 (fbcaps.len < caps.len))
919 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
921 int flags = info->flags;
924 if (var->activate & FB_ACTIVATE_INV_MODE) {
925 struct fb_videomode mode1, mode2;
927 fb_var_to_videomode(&mode1, var);
928 fb_var_to_videomode(&mode2, &info->var);
929 /* make sure we don't delete the videomode of current var */
930 ret = fb_mode_is_equal(&mode1, &mode2);
933 struct fb_event event;
937 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
941 fb_delete_videomode(&mode1, &info->modelist);
944 ret = (ret) ? -EINVAL : 0;
948 if ((var->activate & FB_ACTIVATE_FORCE) ||
949 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
950 u32 activate = var->activate;
952 if (!info->fbops->fb_check_var) {
957 ret = info->fbops->fb_check_var(var, info);
962 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
963 struct fb_var_screeninfo old_var;
964 struct fb_videomode mode;
966 if (info->fbops->fb_get_caps) {
967 ret = fb_check_caps(info, var, activate);
976 if (info->fbops->fb_set_par) {
977 ret = info->fbops->fb_set_par(info);
981 printk(KERN_WARNING "detected "
983 "error code: %d\n", ret);
988 fb_pan_display(info, &info->var);
989 fb_set_cmap(&info->cmap, info);
990 fb_var_to_videomode(&mode, &info->var);
992 if (info->modelist.prev && info->modelist.next &&
993 !list_empty(&info->modelist))
994 ret = fb_add_videomode(&mode, &info->modelist);
996 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
997 struct fb_event event;
998 int evnt = (activate & FB_ACTIVATE_ALL) ?
999 FB_EVENT_MODE_CHANGE_ALL :
1000 FB_EVENT_MODE_CHANGE;
1002 info->flags &= ~FBINFO_MISC_USEREVENT;
1005 fb_notifier_call_chain(evnt, &event);
1015 fb_blank(struct fb_info *info, int blank)
1019 if (blank > FB_BLANK_POWERDOWN)
1020 blank = FB_BLANK_POWERDOWN;
1022 if (info->fbops->fb_blank)
1023 ret = info->fbops->fb_blank(blank, info);
1026 struct fb_event event;
1029 event.data = ␣
1030 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1037 static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1041 struct fb_var_screeninfo var;
1042 struct fb_fix_screeninfo fix;
1043 struct fb_con2fbmap con2fb;
1044 struct fb_cmap cmap_from;
1045 struct fb_cmap_user cmap;
1046 struct fb_event event;
1047 void __user *argp = (void __user *)arg;
1051 case FBIOGET_VSCREENINFO:
1052 if (!lock_fb_info(info))
1055 unlock_fb_info(info);
1057 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1059 case FBIOPUT_VSCREENINFO:
1060 if (copy_from_user(&var, argp, sizeof(var)))
1062 if (!lock_fb_info(info))
1064 acquire_console_sem();
1065 info->flags |= FBINFO_MISC_USEREVENT;
1066 ret = fb_set_var(info, &var);
1067 info->flags &= ~FBINFO_MISC_USEREVENT;
1068 release_console_sem();
1069 unlock_fb_info(info);
1070 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1073 case FBIOGET_FSCREENINFO:
1074 if (!lock_fb_info(info))
1077 unlock_fb_info(info);
1079 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1082 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1084 ret = fb_set_user_cmap(&cmap, info);
1087 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1089 if (!lock_fb_info(info))
1091 cmap_from = info->cmap;
1092 unlock_fb_info(info);
1093 ret = fb_cmap_to_user(&cmap_from, &cmap);
1095 case FBIOPAN_DISPLAY:
1096 if (copy_from_user(&var, argp, sizeof(var)))
1098 if (!lock_fb_info(info))
1100 acquire_console_sem();
1101 ret = fb_pan_display(info, &var);
1102 release_console_sem();
1103 unlock_fb_info(info);
1104 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1110 case FBIOGET_CON2FBMAP:
1111 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1113 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1115 con2fb.framebuffer = -1;
1116 event.data = &con2fb;
1117 if (!lock_fb_info(info))
1120 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1121 unlock_fb_info(info);
1122 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1124 case FBIOPUT_CON2FBMAP:
1125 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1127 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1129 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1131 if (!registered_fb[con2fb.framebuffer])
1132 request_module("fb%d", con2fb.framebuffer);
1133 if (!registered_fb[con2fb.framebuffer]) {
1137 event.data = &con2fb;
1138 if (!lock_fb_info(info))
1141 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1142 unlock_fb_info(info);
1145 if (!lock_fb_info(info))
1147 acquire_console_sem();
1148 info->flags |= FBINFO_MISC_USEREVENT;
1149 ret = fb_blank(info, arg);
1150 info->flags &= ~FBINFO_MISC_USEREVENT;
1151 release_console_sem();
1152 unlock_fb_info(info);
1155 if (!lock_fb_info(info))
1159 ret = fb->fb_ioctl(info, cmd, arg);
1162 unlock_fb_info(info);
1167 static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1169 struct inode *inode = file->f_path.dentry->d_inode;
1170 int fbidx = iminor(inode);
1171 struct fb_info *info = registered_fb[fbidx];
1173 return do_fb_ioctl(info, cmd, arg);
1176 #ifdef CONFIG_COMPAT
1177 struct fb_fix_screeninfo32 {
1179 compat_caddr_t smem_start;
1188 compat_caddr_t mmio_start;
1198 compat_caddr_t green;
1199 compat_caddr_t blue;
1200 compat_caddr_t transp;
1203 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1206 struct fb_cmap_user __user *cmap;
1207 struct fb_cmap32 __user *cmap32;
1211 cmap = compat_alloc_user_space(sizeof(*cmap));
1212 cmap32 = compat_ptr(arg);
1214 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1217 if (get_user(data, &cmap32->red) ||
1218 put_user(compat_ptr(data), &cmap->red) ||
1219 get_user(data, &cmap32->green) ||
1220 put_user(compat_ptr(data), &cmap->green) ||
1221 get_user(data, &cmap32->blue) ||
1222 put_user(compat_ptr(data), &cmap->blue) ||
1223 get_user(data, &cmap32->transp) ||
1224 put_user(compat_ptr(data), &cmap->transp))
1227 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1230 if (copy_in_user(&cmap32->start,
1238 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1239 struct fb_fix_screeninfo32 __user *fix32)
1244 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1246 data = (__u32) (unsigned long) fix->smem_start;
1247 err |= put_user(data, &fix32->smem_start);
1249 err |= put_user(fix->smem_len, &fix32->smem_len);
1250 err |= put_user(fix->type, &fix32->type);
1251 err |= put_user(fix->type_aux, &fix32->type_aux);
1252 err |= put_user(fix->visual, &fix32->visual);
1253 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1254 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1255 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1256 err |= put_user(fix->line_length, &fix32->line_length);
1258 data = (__u32) (unsigned long) fix->mmio_start;
1259 err |= put_user(data, &fix32->mmio_start);
1261 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1262 err |= put_user(fix->accel, &fix32->accel);
1263 err |= copy_to_user(fix32->reserved, fix->reserved,
1264 sizeof(fix->reserved));
1269 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1272 mm_segment_t old_fs;
1273 struct fb_fix_screeninfo fix;
1274 struct fb_fix_screeninfo32 __user *fix32;
1277 fix32 = compat_ptr(arg);
1281 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1285 err = do_fscreeninfo_to_user(&fix, fix32);
1290 static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1293 struct inode *inode = file->f_path.dentry->d_inode;
1294 int fbidx = iminor(inode);
1295 struct fb_info *info = registered_fb[fbidx];
1296 struct fb_ops *fb = info->fbops;
1297 long ret = -ENOIOCTLCMD;
1300 case FBIOGET_VSCREENINFO:
1301 case FBIOPUT_VSCREENINFO:
1302 case FBIOPAN_DISPLAY:
1303 case FBIOGET_CON2FBMAP:
1304 case FBIOPUT_CON2FBMAP:
1305 arg = (unsigned long) compat_ptr(arg);
1307 ret = do_fb_ioctl(info, cmd, arg);
1310 case FBIOGET_FSCREENINFO:
1311 ret = fb_get_fscreeninfo(info, cmd, arg);
1316 ret = fb_getput_cmap(info, cmd, arg);
1320 if (fb->fb_compat_ioctl)
1321 ret = fb->fb_compat_ioctl(info, cmd, arg);
1329 fb_mmap(struct file *file, struct vm_area_struct * vma)
1331 int fbidx = iminor(file->f_path.dentry->d_inode);
1332 struct fb_info *info = registered_fb[fbidx];
1333 struct fb_ops *fb = info->fbops;
1335 unsigned long start;
1338 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1340 off = vma->vm_pgoff << PAGE_SHIFT;
1343 mutex_lock(&info->mm_lock);
1346 res = fb->fb_mmap(info, vma);
1347 mutex_unlock(&info->mm_lock);
1351 /* frame buffer memory */
1352 start = info->fix.smem_start;
1353 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1355 /* memory mapped io */
1357 if (info->var.accel_flags) {
1358 mutex_unlock(&info->mm_lock);
1361 start = info->fix.mmio_start;
1362 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1364 mutex_unlock(&info->mm_lock);
1366 if ((vma->vm_end - vma->vm_start + off) > len)
1369 vma->vm_pgoff = off >> PAGE_SHIFT;
1370 /* This is an IO map - tell maydump to skip this VMA */
1371 vma->vm_flags |= VM_IO | VM_RESERVED;
1372 fb_pgprotect(file, vma, off);
1373 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1374 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1380 fb_open(struct inode *inode, struct file *file)
1381 __acquires(&info->lock)
1382 __releases(&info->lock)
1384 int fbidx = iminor(inode);
1385 struct fb_info *info;
1388 if (fbidx >= FB_MAX)
1390 info = registered_fb[fbidx];
1392 request_module("fb%d", fbidx);
1393 info = registered_fb[fbidx];
1396 mutex_lock(&info->lock);
1397 if (!try_module_get(info->fbops->owner)) {
1401 file->private_data = info;
1402 if (info->fbops->fb_open) {
1403 res = info->fbops->fb_open(info,1);
1405 module_put(info->fbops->owner);
1407 #ifdef CONFIG_FB_DEFERRED_IO
1409 fb_deferred_io_open(info, inode, file);
1412 mutex_unlock(&info->lock);
1417 fb_release(struct inode *inode, struct file *file)
1418 __acquires(&info->lock)
1419 __releases(&info->lock)
1421 struct fb_info * const info = file->private_data;
1423 mutex_lock(&info->lock);
1424 if (info->fbops->fb_release)
1425 info->fbops->fb_release(info,1);
1426 module_put(info->fbops->owner);
1427 mutex_unlock(&info->lock);
1431 static const struct file_operations fb_fops = {
1432 .owner = THIS_MODULE,
1435 .unlocked_ioctl = fb_ioctl,
1436 #ifdef CONFIG_COMPAT
1437 .compat_ioctl = fb_compat_ioctl,
1441 .release = fb_release,
1442 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1443 .get_unmapped_area = get_fb_unmapped_area,
1445 #ifdef CONFIG_FB_DEFERRED_IO
1446 .fsync = fb_deferred_io_fsync,
1450 struct class *fb_class;
1451 EXPORT_SYMBOL(fb_class);
1453 static int fb_check_foreignness(struct fb_info *fi)
1455 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1457 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1460 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1462 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1463 #endif /* __BIG_ENDIAN */
1465 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1466 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1467 "support this framebuffer\n", fi->fix.id);
1469 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1470 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1471 "support this framebuffer\n", fi->fix.id);
1478 static bool fb_do_apertures_overlap(struct fb_info *gen, struct fb_info *hw)
1480 /* is the generic aperture base the same as the HW one */
1481 if (gen->aperture_base == hw->aperture_base)
1483 /* is the generic aperture base inside the hw base->hw base+size */
1484 if (gen->aperture_base > hw->aperture_base && gen->aperture_base <= hw->aperture_base + hw->aperture_size)
1489 * register_framebuffer - registers a frame buffer device
1490 * @fb_info: frame buffer info structure
1492 * Registers a frame buffer device @fb_info.
1494 * Returns negative errno on error, or zero for success.
1499 register_framebuffer(struct fb_info *fb_info)
1502 struct fb_event event;
1503 struct fb_videomode mode;
1505 if (num_registered_fb == FB_MAX)
1508 if (fb_check_foreignness(fb_info))
1511 /* check all firmware fbs and kick off if the base addr overlaps */
1512 for (i = 0 ; i < FB_MAX; i++) {
1513 if (!registered_fb[i])
1516 if (registered_fb[i]->flags & FBINFO_MISC_FIRMWARE) {
1517 if (fb_do_apertures_overlap(registered_fb[i], fb_info)) {
1518 printk(KERN_ERR "fb: conflicting fb hw usage "
1519 "%s vs %s - removing generic driver\n",
1521 registered_fb[i]->fix.id);
1522 unregister_framebuffer(registered_fb[i]);
1528 num_registered_fb++;
1529 for (i = 0 ; i < FB_MAX; i++)
1530 if (!registered_fb[i])
1533 mutex_init(&fb_info->lock);
1534 mutex_init(&fb_info->mm_lock);
1536 fb_info->dev = device_create(fb_class, fb_info->device,
1537 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1538 if (IS_ERR(fb_info->dev)) {
1540 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1541 fb_info->dev = NULL;
1543 fb_init_device(fb_info);
1545 if (fb_info->pixmap.addr == NULL) {
1546 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1547 if (fb_info->pixmap.addr) {
1548 fb_info->pixmap.size = FBPIXMAPSIZE;
1549 fb_info->pixmap.buf_align = 1;
1550 fb_info->pixmap.scan_align = 1;
1551 fb_info->pixmap.access_align = 32;
1552 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1555 fb_info->pixmap.offset = 0;
1557 if (!fb_info->pixmap.blit_x)
1558 fb_info->pixmap.blit_x = ~(u32)0;
1560 if (!fb_info->pixmap.blit_y)
1561 fb_info->pixmap.blit_y = ~(u32)0;
1563 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1564 INIT_LIST_HEAD(&fb_info->modelist);
1566 fb_var_to_videomode(&mode, &fb_info->var);
1567 fb_add_videomode(&mode, &fb_info->modelist);
1568 registered_fb[i] = fb_info;
1570 event.info = fb_info;
1571 if (!lock_fb_info(fb_info))
1573 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1574 unlock_fb_info(fb_info);
1580 * unregister_framebuffer - releases a frame buffer device
1581 * @fb_info: frame buffer info structure
1583 * Unregisters a frame buffer device @fb_info.
1585 * Returns negative errno on error, or zero for success.
1587 * This function will also notify the framebuffer console
1588 * to release the driver.
1590 * This is meant to be called within a driver's module_exit()
1591 * function. If this is called outside module_exit(), ensure
1592 * that the driver implements fb_open() and fb_release() to
1593 * check that no processes are using the device.
1597 unregister_framebuffer(struct fb_info *fb_info)
1599 struct fb_event event;
1603 if (!registered_fb[i]) {
1609 if (!lock_fb_info(fb_info))
1611 event.info = fb_info;
1612 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1613 unlock_fb_info(fb_info);
1620 if (fb_info->pixmap.addr &&
1621 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1622 kfree(fb_info->pixmap.addr);
1623 fb_destroy_modelist(&fb_info->modelist);
1624 registered_fb[i]=NULL;
1625 num_registered_fb--;
1626 fb_cleanup_device(fb_info);
1627 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1628 event.info = fb_info;
1629 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1631 /* this may free fb info */
1632 if (fb_info->fbops->fb_destroy)
1633 fb_info->fbops->fb_destroy(fb_info);
1639 * fb_set_suspend - low level driver signals suspend
1640 * @info: framebuffer affected
1641 * @state: 0 = resuming, !=0 = suspending
1643 * This is meant to be used by low level drivers to
1644 * signal suspend/resume to the core & clients.
1645 * It must be called with the console semaphore held
1647 void fb_set_suspend(struct fb_info *info, int state)
1649 struct fb_event event;
1651 if (!lock_fb_info(info))
1655 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1656 info->state = FBINFO_STATE_SUSPENDED;
1658 info->state = FBINFO_STATE_RUNNING;
1659 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1661 unlock_fb_info(info);
1665 * fbmem_init - init frame buffer subsystem
1667 * Initialize the frame buffer subsystem.
1669 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1676 proc_create("fb", 0, NULL, &fb_proc_fops);
1678 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1679 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1681 fb_class = class_create(THIS_MODULE, "graphics");
1682 if (IS_ERR(fb_class)) {
1683 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1690 module_init(fbmem_init);
1694 remove_proc_entry("fb", NULL);
1695 class_destroy(fb_class);
1696 unregister_chrdev(FB_MAJOR, "fb");
1699 module_exit(fbmem_exit);
1700 MODULE_LICENSE("GPL");
1701 MODULE_DESCRIPTION("Framebuffer base");
1703 subsys_initcall(fbmem_init);
1706 int fb_new_modelist(struct fb_info *info)
1708 struct fb_event event;
1709 struct fb_var_screeninfo var = info->var;
1710 struct list_head *pos, *n;
1711 struct fb_modelist *modelist;
1712 struct fb_videomode *m, mode;
1715 list_for_each_safe(pos, n, &info->modelist) {
1716 modelist = list_entry(pos, struct fb_modelist, list);
1717 m = &modelist->mode;
1718 fb_videomode_to_var(&var, m);
1719 var.activate = FB_ACTIVATE_TEST;
1720 err = fb_set_var(info, &var);
1721 fb_var_to_videomode(&mode, &var);
1722 if (err || !fb_mode_is_equal(m, &mode)) {
1730 if (!list_empty(&info->modelist)) {
1731 if (!lock_fb_info(info))
1734 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1735 unlock_fb_info(info);
1741 static char *video_options[FB_MAX] __read_mostly;
1742 static int ofonly __read_mostly;
1745 * fb_get_options - get kernel boot parameters
1746 * @name: framebuffer name as it would appear in
1747 * the boot parameter line
1748 * (video=<name>:<options>)
1749 * @option: the option will be stored here
1751 * NOTE: Needed to maintain backwards compatibility
1753 int fb_get_options(char *name, char **option)
1755 char *opt, *options = NULL;
1756 int opt_len, retval = 0;
1757 int name_len = strlen(name), i;
1759 if (name_len && ofonly && strncmp(name, "offb", 4))
1762 if (name_len && !retval) {
1763 for (i = 0; i < FB_MAX; i++) {
1764 if (video_options[i] == NULL)
1766 opt_len = strlen(video_options[i]);
1769 opt = video_options[i];
1770 if (!strncmp(name, opt, name_len) &&
1771 opt[name_len] == ':')
1772 options = opt + name_len + 1;
1775 if (options && !strncmp(options, "off", 3))
1786 * video_setup - process command line options
1787 * @options: string of options
1789 * Process command line options for frame buffer subsystem.
1791 * NOTE: This function is a __setup and __init function.
1792 * It only stores the options. Drivers have to call
1793 * fb_get_options() as necessary.
1798 static int __init video_setup(char *options)
1802 if (!options || !*options)
1805 if (!global && !strncmp(options, "ofonly", 6)) {
1810 if (!global && !strchr(options, ':')) {
1811 fb_mode_option = options;
1816 for (i = 0; i < FB_MAX; i++) {
1817 if (video_options[i] == NULL) {
1818 video_options[i] = options;
1827 __setup("video=", video_setup);
1831 * Visible symbols for modules
1834 EXPORT_SYMBOL(register_framebuffer);
1835 EXPORT_SYMBOL(unregister_framebuffer);
1836 EXPORT_SYMBOL(num_registered_fb);
1837 EXPORT_SYMBOL(registered_fb);
1838 EXPORT_SYMBOL(fb_show_logo);
1839 EXPORT_SYMBOL(fb_set_var);
1840 EXPORT_SYMBOL(fb_blank);
1841 EXPORT_SYMBOL(fb_pan_display);
1842 EXPORT_SYMBOL(fb_get_buffer_offset);
1843 EXPORT_SYMBOL(fb_set_suspend);
1844 EXPORT_SYMBOL(fb_get_options);
1846 MODULE_LICENSE("GPL");