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 static void fb_rotate_logo_ud(const u8 *in, u8 *out, u32 width, u32 height)
334 u32 size = width * height, i;
338 for (i = size; i--; )
342 static void fb_rotate_logo_cw(const u8 *in, u8 *out, u32 width, u32 height)
344 int i, j, h = height - 1;
346 for (i = 0; i < height; i++)
347 for (j = 0; j < width; j++)
348 out[height * j + h - i] = *in++;
351 static void fb_rotate_logo_ccw(const u8 *in, u8 *out, u32 width, u32 height)
353 int i, j, w = width - 1;
355 for (i = 0; i < height; i++)
356 for (j = 0; j < width; j++)
357 out[height * (w - j) + i] = *in++;
360 static void fb_rotate_logo(struct fb_info *info, u8 *dst,
361 struct fb_image *image, int rotate)
365 if (rotate == FB_ROTATE_UD) {
366 fb_rotate_logo_ud(image->data, dst, image->width,
368 image->dx = info->var.xres - image->width - image->dx;
369 image->dy = info->var.yres - image->height - image->dy;
370 } else if (rotate == FB_ROTATE_CW) {
371 fb_rotate_logo_cw(image->data, dst, image->width,
374 image->width = image->height;
377 image->dy = image->dx;
378 image->dx = info->var.xres - image->width - tmp;
379 } else if (rotate == FB_ROTATE_CCW) {
380 fb_rotate_logo_ccw(image->data, dst, image->width,
383 image->width = image->height;
386 image->dx = image->dy;
387 image->dy = info->var.yres - image->height - tmp;
393 static void fb_do_show_logo(struct fb_info *info, struct fb_image *image,
394 int rotate, unsigned int num)
398 if (rotate == FB_ROTATE_UR) {
400 x < num && image->dx + image->width <= info->var.xres;
402 info->fbops->fb_imageblit(info, image);
403 image->dx += image->width + 8;
405 } else if (rotate == FB_ROTATE_UD) {
406 for (x = 0; x < num && image->dx >= 0; x++) {
407 info->fbops->fb_imageblit(info, image);
408 image->dx -= image->width + 8;
410 } else if (rotate == FB_ROTATE_CW) {
412 x < num && image->dy + image->height <= info->var.yres;
414 info->fbops->fb_imageblit(info, image);
415 image->dy += image->height + 8;
417 } else if (rotate == FB_ROTATE_CCW) {
418 for (x = 0; x < num && image->dy >= 0; x++) {
419 info->fbops->fb_imageblit(info, image);
420 image->dy -= image->height + 8;
425 static int fb_show_logo_line(struct fb_info *info, int rotate,
426 const struct linux_logo *logo, int y,
429 u32 *palette = NULL, *saved_pseudo_palette = NULL;
430 unsigned char *logo_new = NULL, *logo_rotate = NULL;
431 struct fb_image image;
433 /* Return if the frame buffer is not mapped or suspended */
434 if (logo == NULL || info->state != FBINFO_STATE_RUNNING ||
435 info->flags & FBINFO_MODULE)
439 image.data = logo->data;
441 if (fb_logo.needs_cmapreset)
442 fb_set_logocmap(info, logo);
444 if (fb_logo.needs_truepalette ||
445 fb_logo.needs_directpalette) {
446 palette = kmalloc(256 * 4, GFP_KERNEL);
450 if (fb_logo.needs_truepalette)
451 fb_set_logo_truepalette(info, logo, palette);
453 fb_set_logo_directpalette(info, logo, palette);
455 saved_pseudo_palette = info->pseudo_palette;
456 info->pseudo_palette = palette;
459 if (fb_logo.depth <= 4) {
460 logo_new = kmalloc(logo->width * logo->height, GFP_KERNEL);
461 if (logo_new == NULL) {
463 if (saved_pseudo_palette)
464 info->pseudo_palette = saved_pseudo_palette;
467 image.data = logo_new;
468 fb_set_logo(info, logo, logo_new, fb_logo.depth);
473 image.width = logo->width;
474 image.height = logo->height;
477 logo_rotate = kmalloc(logo->width *
478 logo->height, GFP_KERNEL);
480 fb_rotate_logo(info, logo_rotate, &image, rotate);
483 fb_do_show_logo(info, &image, rotate, n);
486 if (saved_pseudo_palette != NULL)
487 info->pseudo_palette = saved_pseudo_palette;
494 #ifdef CONFIG_FB_LOGO_EXTRA
496 #define FB_LOGO_EX_NUM_MAX 10
497 static struct logo_data_extra {
498 const struct linux_logo *logo;
500 } fb_logo_ex[FB_LOGO_EX_NUM_MAX];
501 static unsigned int fb_logo_ex_num;
503 void fb_append_extra_logo(const struct linux_logo *logo, unsigned int n)
505 if (!n || fb_logo_ex_num == FB_LOGO_EX_NUM_MAX)
508 fb_logo_ex[fb_logo_ex_num].logo = logo;
509 fb_logo_ex[fb_logo_ex_num].n = n;
513 static int fb_prepare_extra_logos(struct fb_info *info, unsigned int height,
518 /* FIXME: logo_ex supports only truecolor fb. */
519 if (info->fix.visual != FB_VISUAL_TRUECOLOR)
522 for (i = 0; i < fb_logo_ex_num; i++) {
523 if (fb_logo_ex[i].logo->type != fb_logo.logo->type) {
524 fb_logo_ex[i].logo = NULL;
527 height += fb_logo_ex[i].logo->height;
529 height -= fb_logo_ex[i].logo->height;
537 static int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
541 for (i = 0; i < fb_logo_ex_num; i++)
542 y += fb_show_logo_line(info, rotate,
543 fb_logo_ex[i].logo, y, fb_logo_ex[i].n);
548 #else /* !CONFIG_FB_LOGO_EXTRA */
550 static inline int fb_prepare_extra_logos(struct fb_info *info,
557 static inline int fb_show_extra_logos(struct fb_info *info, int y, int rotate)
562 #endif /* CONFIG_FB_LOGO_EXTRA */
565 int fb_prepare_logo(struct fb_info *info, int rotate)
567 int depth = fb_get_color_depth(&info->var, &info->fix);
570 memset(&fb_logo, 0, sizeof(struct logo_data));
572 if (info->flags & FBINFO_MISC_TILEBLITTING ||
573 info->flags & FBINFO_MODULE)
576 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
577 depth = info->var.blue.length;
578 if (info->var.red.length < depth)
579 depth = info->var.red.length;
580 if (info->var.green.length < depth)
581 depth = info->var.green.length;
584 if (info->fix.visual == FB_VISUAL_STATIC_PSEUDOCOLOR && depth > 4) {
585 /* assume console colormap */
589 /* Return if no suitable logo was found */
590 fb_logo.logo = fb_find_logo(depth);
596 if (rotate == FB_ROTATE_UR || rotate == FB_ROTATE_UD)
597 yres = info->var.yres;
599 yres = info->var.xres;
601 if (fb_logo.logo->height > yres) {
606 /* What depth we asked for might be different from what we get */
607 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
609 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
615 if (fb_logo.depth > 4 && depth > 4) {
616 switch (info->fix.visual) {
617 case FB_VISUAL_TRUECOLOR:
618 fb_logo.needs_truepalette = 1;
620 case FB_VISUAL_DIRECTCOLOR:
621 fb_logo.needs_directpalette = 1;
622 fb_logo.needs_cmapreset = 1;
624 case FB_VISUAL_PSEUDOCOLOR:
625 fb_logo.needs_cmapreset = 1;
630 return fb_prepare_extra_logos(info, fb_logo.logo->height, yres);
633 int fb_show_logo(struct fb_info *info, int rotate)
637 y = fb_show_logo_line(info, rotate, fb_logo.logo, 0,
639 y = fb_show_extra_logos(info, y, rotate);
644 int fb_prepare_logo(struct fb_info *info, int rotate) { return 0; }
645 int fb_show_logo(struct fb_info *info, int rotate) { return 0; }
646 #endif /* CONFIG_LOGO */
648 static void *fb_seq_start(struct seq_file *m, loff_t *pos)
650 return (*pos < FB_MAX) ? pos : NULL;
653 static void *fb_seq_next(struct seq_file *m, void *v, loff_t *pos)
656 return (*pos < FB_MAX) ? pos : NULL;
659 static void fb_seq_stop(struct seq_file *m, void *v)
663 static int fb_seq_show(struct seq_file *m, void *v)
665 int i = *(loff_t *)v;
666 struct fb_info *fi = registered_fb[i];
669 seq_printf(m, "%d %s\n", fi->node, fi->fix.id);
673 static const struct seq_operations proc_fb_seq_ops = {
674 .start = fb_seq_start,
680 static int proc_fb_open(struct inode *inode, struct file *file)
682 return seq_open(file, &proc_fb_seq_ops);
685 static const struct file_operations fb_proc_fops = {
686 .owner = THIS_MODULE,
687 .open = proc_fb_open,
690 .release = seq_release,
694 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
696 unsigned long p = *ppos;
697 struct inode *inode = file->f_path.dentry->d_inode;
698 int fbidx = iminor(inode);
699 struct fb_info *info = registered_fb[fbidx];
702 int c, cnt = 0, err = 0;
703 unsigned long total_size;
705 if (!info || ! info->screen_base)
708 if (info->state != FBINFO_STATE_RUNNING)
711 if (info->fbops->fb_read)
712 return info->fbops->fb_read(info, buf, count, ppos);
714 total_size = info->screen_size;
717 total_size = info->fix.smem_len;
722 if (count >= total_size)
725 if (count + p > total_size)
726 count = total_size - p;
728 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
733 src = (u8 __iomem *) (info->screen_base + p);
735 if (info->fbops->fb_sync)
736 info->fbops->fb_sync(info);
739 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
741 fb_memcpy_fromfb(dst, src, c);
745 if (copy_to_user(buf, buffer, c)) {
757 return (err) ? err : cnt;
761 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
763 unsigned long p = *ppos;
764 struct inode *inode = file->f_path.dentry->d_inode;
765 int fbidx = iminor(inode);
766 struct fb_info *info = registered_fb[fbidx];
769 int c, cnt = 0, err = 0;
770 unsigned long total_size;
772 if (!info || !info->screen_base)
775 if (info->state != FBINFO_STATE_RUNNING)
778 if (info->fbops->fb_write)
779 return info->fbops->fb_write(info, buf, count, ppos);
781 total_size = info->screen_size;
784 total_size = info->fix.smem_len;
789 if (count > total_size) {
794 if (count + p > total_size) {
798 count = total_size - p;
801 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
806 dst = (u8 __iomem *) (info->screen_base + p);
808 if (info->fbops->fb_sync)
809 info->fbops->fb_sync(info);
812 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
815 if (copy_from_user(src, buf, c)) {
820 fb_memcpy_tofb(dst, src, c);
831 return (cnt) ? cnt : err;
835 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
837 struct fb_fix_screeninfo *fix = &info->fix;
838 unsigned int yres = info->var.yres;
841 if (var->yoffset > 0) {
842 if (var->vmode & FB_VMODE_YWRAP) {
843 if (!fix->ywrapstep || (var->yoffset % fix->ywrapstep))
847 } else if (!fix->ypanstep || (var->yoffset % fix->ypanstep))
851 if (var->xoffset > 0 && (!fix->xpanstep ||
852 (var->xoffset % fix->xpanstep)))
855 if (err || !info->fbops->fb_pan_display ||
856 var->yoffset > info->var.yres_virtual - yres ||
857 var->xoffset > info->var.xres_virtual - info->var.xres)
860 if ((err = info->fbops->fb_pan_display(var, info)))
862 info->var.xoffset = var->xoffset;
863 info->var.yoffset = var->yoffset;
864 if (var->vmode & FB_VMODE_YWRAP)
865 info->var.vmode |= FB_VMODE_YWRAP;
867 info->var.vmode &= ~FB_VMODE_YWRAP;
871 static int fb_check_caps(struct fb_info *info, struct fb_var_screeninfo *var,
874 struct fb_event event;
875 struct fb_blit_caps caps, fbcaps;
878 memset(&caps, 0, sizeof(caps));
879 memset(&fbcaps, 0, sizeof(fbcaps));
880 caps.flags = (activate & FB_ACTIVATE_ALL) ? 1 : 0;
883 fb_notifier_call_chain(FB_EVENT_GET_REQ, &event);
884 info->fbops->fb_get_caps(info, &fbcaps, var);
886 if (((fbcaps.x ^ caps.x) & caps.x) ||
887 ((fbcaps.y ^ caps.y) & caps.y) ||
888 (fbcaps.len < caps.len))
895 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
897 int flags = info->flags;
900 if (var->activate & FB_ACTIVATE_INV_MODE) {
901 struct fb_videomode mode1, mode2;
903 fb_var_to_videomode(&mode1, var);
904 fb_var_to_videomode(&mode2, &info->var);
905 /* make sure we don't delete the videomode of current var */
906 ret = fb_mode_is_equal(&mode1, &mode2);
909 struct fb_event event;
913 ret = fb_notifier_call_chain(FB_EVENT_MODE_DELETE, &event);
917 fb_delete_videomode(&mode1, &info->modelist);
920 ret = (ret) ? -EINVAL : 0;
924 if ((var->activate & FB_ACTIVATE_FORCE) ||
925 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
926 u32 activate = var->activate;
928 if (!info->fbops->fb_check_var) {
933 ret = info->fbops->fb_check_var(var, info);
938 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
939 struct fb_var_screeninfo old_var;
940 struct fb_videomode mode;
942 if (info->fbops->fb_get_caps) {
943 ret = fb_check_caps(info, var, activate);
952 if (info->fbops->fb_set_par) {
953 ret = info->fbops->fb_set_par(info);
957 printk(KERN_WARNING "detected "
959 "error code: %d\n", ret);
964 fb_pan_display(info, &info->var);
965 fb_set_cmap(&info->cmap, info);
966 fb_var_to_videomode(&mode, &info->var);
968 if (info->modelist.prev && info->modelist.next &&
969 !list_empty(&info->modelist))
970 ret = fb_add_videomode(&mode, &info->modelist);
972 if (!ret && (flags & FBINFO_MISC_USEREVENT)) {
973 struct fb_event event;
974 int evnt = (activate & FB_ACTIVATE_ALL) ?
975 FB_EVENT_MODE_CHANGE_ALL :
976 FB_EVENT_MODE_CHANGE;
978 info->flags &= ~FBINFO_MISC_USEREVENT;
981 fb_notifier_call_chain(evnt, &event);
991 fb_blank(struct fb_info *info, int blank)
995 if (blank > FB_BLANK_POWERDOWN)
996 blank = FB_BLANK_POWERDOWN;
998 if (info->fbops->fb_blank)
999 ret = info->fbops->fb_blank(blank, info);
1002 struct fb_event event;
1005 event.data = ␣
1006 fb_notifier_call_chain(FB_EVENT_BLANK, &event);
1012 static long do_fb_ioctl(struct fb_info *info, unsigned int cmd,
1016 struct fb_var_screeninfo var;
1017 struct fb_fix_screeninfo fix;
1018 struct fb_con2fbmap con2fb;
1019 struct fb_cmap cmap_from;
1020 struct fb_cmap_user cmap;
1021 struct fb_event event;
1022 void __user *argp = (void __user *)arg;
1026 case FBIOGET_VSCREENINFO:
1027 if (!lock_fb_info(info))
1030 unlock_fb_info(info);
1032 ret = copy_to_user(argp, &var, sizeof(var)) ? -EFAULT : 0;
1034 case FBIOPUT_VSCREENINFO:
1035 if (copy_from_user(&var, argp, sizeof(var)))
1037 if (!lock_fb_info(info))
1039 acquire_console_sem();
1040 info->flags |= FBINFO_MISC_USEREVENT;
1041 ret = fb_set_var(info, &var);
1042 info->flags &= ~FBINFO_MISC_USEREVENT;
1043 release_console_sem();
1044 unlock_fb_info(info);
1045 if (!ret && copy_to_user(argp, &var, sizeof(var)))
1048 case FBIOGET_FSCREENINFO:
1049 if (!lock_fb_info(info))
1052 unlock_fb_info(info);
1054 ret = copy_to_user(argp, &fix, sizeof(fix)) ? -EFAULT : 0;
1057 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1059 ret = fb_set_user_cmap(&cmap, info);
1062 if (copy_from_user(&cmap, argp, sizeof(cmap)))
1064 if (!lock_fb_info(info))
1066 cmap_from = info->cmap;
1067 unlock_fb_info(info);
1068 ret = fb_cmap_to_user(&cmap_from, &cmap);
1070 case FBIOPAN_DISPLAY:
1071 if (copy_from_user(&var, argp, sizeof(var)))
1073 if (!lock_fb_info(info))
1075 acquire_console_sem();
1076 ret = fb_pan_display(info, &var);
1077 release_console_sem();
1078 unlock_fb_info(info);
1079 if (ret == 0 && copy_to_user(argp, &var, sizeof(var)))
1085 case FBIOGET_CON2FBMAP:
1086 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1088 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1090 con2fb.framebuffer = -1;
1091 event.data = &con2fb;
1092 if (!lock_fb_info(info))
1095 fb_notifier_call_chain(FB_EVENT_GET_CONSOLE_MAP, &event);
1096 unlock_fb_info(info);
1097 ret = copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
1099 case FBIOPUT_CON2FBMAP:
1100 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
1102 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1104 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1106 if (!registered_fb[con2fb.framebuffer])
1107 request_module("fb%d", con2fb.framebuffer);
1108 if (!registered_fb[con2fb.framebuffer]) {
1112 event.data = &con2fb;
1113 if (!lock_fb_info(info))
1116 ret = fb_notifier_call_chain(FB_EVENT_SET_CONSOLE_MAP, &event);
1117 unlock_fb_info(info);
1120 if (!lock_fb_info(info))
1122 acquire_console_sem();
1123 info->flags |= FBINFO_MISC_USEREVENT;
1124 ret = fb_blank(info, arg);
1125 info->flags &= ~FBINFO_MISC_USEREVENT;
1126 release_console_sem();
1127 unlock_fb_info(info);
1130 if (!lock_fb_info(info))
1134 ret = fb->fb_ioctl(info, cmd, arg);
1137 unlock_fb_info(info);
1142 static long fb_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1144 struct inode *inode = file->f_path.dentry->d_inode;
1145 int fbidx = iminor(inode);
1146 struct fb_info *info = registered_fb[fbidx];
1148 return do_fb_ioctl(info, cmd, arg);
1151 #ifdef CONFIG_COMPAT
1152 struct fb_fix_screeninfo32 {
1154 compat_caddr_t smem_start;
1163 compat_caddr_t mmio_start;
1173 compat_caddr_t green;
1174 compat_caddr_t blue;
1175 compat_caddr_t transp;
1178 static int fb_getput_cmap(struct fb_info *info, unsigned int cmd,
1181 struct fb_cmap_user __user *cmap;
1182 struct fb_cmap32 __user *cmap32;
1186 cmap = compat_alloc_user_space(sizeof(*cmap));
1187 cmap32 = compat_ptr(arg);
1189 if (copy_in_user(&cmap->start, &cmap32->start, 2 * sizeof(__u32)))
1192 if (get_user(data, &cmap32->red) ||
1193 put_user(compat_ptr(data), &cmap->red) ||
1194 get_user(data, &cmap32->green) ||
1195 put_user(compat_ptr(data), &cmap->green) ||
1196 get_user(data, &cmap32->blue) ||
1197 put_user(compat_ptr(data), &cmap->blue) ||
1198 get_user(data, &cmap32->transp) ||
1199 put_user(compat_ptr(data), &cmap->transp))
1202 err = do_fb_ioctl(info, cmd, (unsigned long) cmap);
1205 if (copy_in_user(&cmap32->start,
1213 static int do_fscreeninfo_to_user(struct fb_fix_screeninfo *fix,
1214 struct fb_fix_screeninfo32 __user *fix32)
1219 err = copy_to_user(&fix32->id, &fix->id, sizeof(fix32->id));
1221 data = (__u32) (unsigned long) fix->smem_start;
1222 err |= put_user(data, &fix32->smem_start);
1224 err |= put_user(fix->smem_len, &fix32->smem_len);
1225 err |= put_user(fix->type, &fix32->type);
1226 err |= put_user(fix->type_aux, &fix32->type_aux);
1227 err |= put_user(fix->visual, &fix32->visual);
1228 err |= put_user(fix->xpanstep, &fix32->xpanstep);
1229 err |= put_user(fix->ypanstep, &fix32->ypanstep);
1230 err |= put_user(fix->ywrapstep, &fix32->ywrapstep);
1231 err |= put_user(fix->line_length, &fix32->line_length);
1233 data = (__u32) (unsigned long) fix->mmio_start;
1234 err |= put_user(data, &fix32->mmio_start);
1236 err |= put_user(fix->mmio_len, &fix32->mmio_len);
1237 err |= put_user(fix->accel, &fix32->accel);
1238 err |= copy_to_user(fix32->reserved, fix->reserved,
1239 sizeof(fix->reserved));
1244 static int fb_get_fscreeninfo(struct fb_info *info, unsigned int cmd,
1247 mm_segment_t old_fs;
1248 struct fb_fix_screeninfo fix;
1249 struct fb_fix_screeninfo32 __user *fix32;
1252 fix32 = compat_ptr(arg);
1256 err = do_fb_ioctl(info, cmd, (unsigned long) &fix);
1260 err = do_fscreeninfo_to_user(&fix, fix32);
1265 static long fb_compat_ioctl(struct file *file, unsigned int cmd,
1268 struct inode *inode = file->f_path.dentry->d_inode;
1269 int fbidx = iminor(inode);
1270 struct fb_info *info = registered_fb[fbidx];
1271 struct fb_ops *fb = info->fbops;
1272 long ret = -ENOIOCTLCMD;
1275 case FBIOGET_VSCREENINFO:
1276 case FBIOPUT_VSCREENINFO:
1277 case FBIOPAN_DISPLAY:
1278 case FBIOGET_CON2FBMAP:
1279 case FBIOPUT_CON2FBMAP:
1280 arg = (unsigned long) compat_ptr(arg);
1282 ret = do_fb_ioctl(info, cmd, arg);
1285 case FBIOGET_FSCREENINFO:
1286 ret = fb_get_fscreeninfo(info, cmd, arg);
1291 ret = fb_getput_cmap(info, cmd, arg);
1295 if (fb->fb_compat_ioctl)
1296 ret = fb->fb_compat_ioctl(info, cmd, arg);
1304 fb_mmap(struct file *file, struct vm_area_struct * vma)
1306 int fbidx = iminor(file->f_path.dentry->d_inode);
1307 struct fb_info *info = registered_fb[fbidx];
1308 struct fb_ops *fb = info->fbops;
1310 unsigned long start;
1313 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1315 off = vma->vm_pgoff << PAGE_SHIFT;
1318 mutex_lock(&info->mm_lock);
1321 res = fb->fb_mmap(info, vma);
1322 mutex_unlock(&info->mm_lock);
1326 /* frame buffer memory */
1327 start = info->fix.smem_start;
1328 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1330 /* memory mapped io */
1332 if (info->var.accel_flags) {
1333 mutex_unlock(&info->mm_lock);
1336 start = info->fix.mmio_start;
1337 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1339 mutex_unlock(&info->mm_lock);
1341 if ((vma->vm_end - vma->vm_start + off) > len)
1344 vma->vm_pgoff = off >> PAGE_SHIFT;
1345 /* This is an IO map - tell maydump to skip this VMA */
1346 vma->vm_flags |= VM_IO | VM_RESERVED;
1347 vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
1348 fb_pgprotect(file, vma, off);
1349 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
1350 vma->vm_end - vma->vm_start, vma->vm_page_prot))
1356 fb_open(struct inode *inode, struct file *file)
1357 __acquires(&info->lock)
1358 __releases(&info->lock)
1360 int fbidx = iminor(inode);
1361 struct fb_info *info;
1364 if (fbidx >= FB_MAX)
1366 info = registered_fb[fbidx];
1368 request_module("fb%d", fbidx);
1369 info = registered_fb[fbidx];
1372 mutex_lock(&info->lock);
1373 if (!try_module_get(info->fbops->owner)) {
1377 file->private_data = info;
1378 if (info->fbops->fb_open) {
1379 res = info->fbops->fb_open(info,1);
1381 module_put(info->fbops->owner);
1383 #ifdef CONFIG_FB_DEFERRED_IO
1385 fb_deferred_io_open(info, inode, file);
1388 mutex_unlock(&info->lock);
1393 fb_release(struct inode *inode, struct file *file)
1394 __acquires(&info->lock)
1395 __releases(&info->lock)
1397 struct fb_info * const info = file->private_data;
1399 mutex_lock(&info->lock);
1400 if (info->fbops->fb_release)
1401 info->fbops->fb_release(info,1);
1402 module_put(info->fbops->owner);
1403 mutex_unlock(&info->lock);
1407 static const struct file_operations fb_fops = {
1408 .owner = THIS_MODULE,
1411 .unlocked_ioctl = fb_ioctl,
1412 #ifdef CONFIG_COMPAT
1413 .compat_ioctl = fb_compat_ioctl,
1417 .release = fb_release,
1418 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1419 .get_unmapped_area = get_fb_unmapped_area,
1421 #ifdef CONFIG_FB_DEFERRED_IO
1422 .fsync = fb_deferred_io_fsync,
1424 .llseek = default_llseek,
1427 struct class *fb_class;
1428 EXPORT_SYMBOL(fb_class);
1430 static int fb_check_foreignness(struct fb_info *fi)
1432 const bool foreign_endian = fi->flags & FBINFO_FOREIGN_ENDIAN;
1434 fi->flags &= ~FBINFO_FOREIGN_ENDIAN;
1437 fi->flags |= foreign_endian ? 0 : FBINFO_BE_MATH;
1439 fi->flags |= foreign_endian ? FBINFO_BE_MATH : 0;
1440 #endif /* __BIG_ENDIAN */
1442 if (fi->flags & FBINFO_BE_MATH && !fb_be_math(fi)) {
1443 pr_err("%s: enable CONFIG_FB_BIG_ENDIAN to "
1444 "support this framebuffer\n", fi->fix.id);
1446 } else if (!(fi->flags & FBINFO_BE_MATH) && fb_be_math(fi)) {
1447 pr_err("%s: enable CONFIG_FB_LITTLE_ENDIAN to "
1448 "support this framebuffer\n", fi->fix.id);
1455 static bool apertures_overlap(struct aperture *gen, struct aperture *hw)
1457 /* is the generic aperture base the same as the HW one */
1458 if (gen->base == hw->base)
1460 /* is the generic aperture base inside the hw base->hw base+size */
1461 if (gen->base > hw->base && gen->base < hw->base + hw->size)
1466 static bool fb_do_apertures_overlap(struct apertures_struct *gena,
1467 struct apertures_struct *hwa)
1473 for (i = 0; i < hwa->count; ++i) {
1474 struct aperture *h = &hwa->ranges[i];
1475 for (j = 0; j < gena->count; ++j) {
1476 struct aperture *g = &gena->ranges[j];
1477 printk(KERN_DEBUG "checking generic (%llx %llx) vs hw (%llx %llx)\n",
1478 (unsigned long long)g->base,
1479 (unsigned long long)g->size,
1480 (unsigned long long)h->base,
1481 (unsigned long long)h->size);
1482 if (apertures_overlap(g, h))
1490 #define VGA_FB_PHYS 0xA0000
1491 void remove_conflicting_framebuffers(struct apertures_struct *a,
1492 const char *name, bool primary)
1496 /* check all firmware fbs and kick off if the base addr overlaps */
1497 for (i = 0 ; i < FB_MAX; i++) {
1498 struct apertures_struct *gen_aper;
1499 if (!registered_fb[i])
1502 if (!(registered_fb[i]->flags & FBINFO_MISC_FIRMWARE))
1505 gen_aper = registered_fb[i]->apertures;
1506 if (fb_do_apertures_overlap(gen_aper, a) ||
1507 (primary && gen_aper && gen_aper->count &&
1508 gen_aper->ranges[0].base == VGA_FB_PHYS)) {
1510 printk(KERN_ERR "fb: conflicting fb hw usage "
1511 "%s vs %s - removing generic driver\n",
1512 name, registered_fb[i]->fix.id);
1513 unregister_framebuffer(registered_fb[i]);
1517 EXPORT_SYMBOL(remove_conflicting_framebuffers);
1520 * register_framebuffer - registers a frame buffer device
1521 * @fb_info: frame buffer info structure
1523 * Registers a frame buffer device @fb_info.
1525 * Returns negative errno on error, or zero for success.
1530 register_framebuffer(struct fb_info *fb_info)
1533 struct fb_event event;
1534 struct fb_videomode mode;
1536 if (num_registered_fb == FB_MAX)
1539 if (fb_check_foreignness(fb_info))
1542 remove_conflicting_framebuffers(fb_info->apertures, fb_info->fix.id,
1543 fb_is_primary_device(fb_info));
1545 num_registered_fb++;
1546 for (i = 0 ; i < FB_MAX; i++)
1547 if (!registered_fb[i])
1550 mutex_init(&fb_info->lock);
1551 mutex_init(&fb_info->mm_lock);
1553 fb_info->dev = device_create(fb_class, fb_info->device,
1554 MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1555 if (IS_ERR(fb_info->dev)) {
1557 printk(KERN_WARNING "Unable to create device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->dev));
1558 fb_info->dev = NULL;
1560 fb_init_device(fb_info);
1562 if (fb_info->pixmap.addr == NULL) {
1563 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1564 if (fb_info->pixmap.addr) {
1565 fb_info->pixmap.size = FBPIXMAPSIZE;
1566 fb_info->pixmap.buf_align = 1;
1567 fb_info->pixmap.scan_align = 1;
1568 fb_info->pixmap.access_align = 32;
1569 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1572 fb_info->pixmap.offset = 0;
1574 if (!fb_info->pixmap.blit_x)
1575 fb_info->pixmap.blit_x = ~(u32)0;
1577 if (!fb_info->pixmap.blit_y)
1578 fb_info->pixmap.blit_y = ~(u32)0;
1580 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1581 INIT_LIST_HEAD(&fb_info->modelist);
1583 fb_var_to_videomode(&mode, &fb_info->var);
1584 fb_add_videomode(&mode, &fb_info->modelist);
1585 registered_fb[i] = fb_info;
1587 event.info = fb_info;
1588 if (!lock_fb_info(fb_info))
1590 fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
1591 unlock_fb_info(fb_info);
1597 * unregister_framebuffer - releases a frame buffer device
1598 * @fb_info: frame buffer info structure
1600 * Unregisters a frame buffer device @fb_info.
1602 * Returns negative errno on error, or zero for success.
1604 * This function will also notify the framebuffer console
1605 * to release the driver.
1607 * This is meant to be called within a driver's module_exit()
1608 * function. If this is called outside module_exit(), ensure
1609 * that the driver implements fb_open() and fb_release() to
1610 * check that no processes are using the device.
1614 unregister_framebuffer(struct fb_info *fb_info)
1616 struct fb_event event;
1620 if (!registered_fb[i]) {
1626 if (!lock_fb_info(fb_info))
1628 event.info = fb_info;
1629 ret = fb_notifier_call_chain(FB_EVENT_FB_UNBIND, &event);
1630 unlock_fb_info(fb_info);
1637 if (fb_info->pixmap.addr &&
1638 (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1639 kfree(fb_info->pixmap.addr);
1640 fb_destroy_modelist(&fb_info->modelist);
1641 registered_fb[i]=NULL;
1642 num_registered_fb--;
1643 fb_cleanup_device(fb_info);
1644 device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1645 event.info = fb_info;
1646 fb_notifier_call_chain(FB_EVENT_FB_UNREGISTERED, &event);
1648 /* this may free fb info */
1649 if (fb_info->fbops->fb_destroy)
1650 fb_info->fbops->fb_destroy(fb_info);
1656 * fb_set_suspend - low level driver signals suspend
1657 * @info: framebuffer affected
1658 * @state: 0 = resuming, !=0 = suspending
1660 * This is meant to be used by low level drivers to
1661 * signal suspend/resume to the core & clients.
1662 * It must be called with the console semaphore held
1664 void fb_set_suspend(struct fb_info *info, int state)
1666 struct fb_event event;
1668 if (!lock_fb_info(info))
1672 fb_notifier_call_chain(FB_EVENT_SUSPEND, &event);
1673 info->state = FBINFO_STATE_SUSPENDED;
1675 info->state = FBINFO_STATE_RUNNING;
1676 fb_notifier_call_chain(FB_EVENT_RESUME, &event);
1678 unlock_fb_info(info);
1682 * fbmem_init - init frame buffer subsystem
1684 * Initialize the frame buffer subsystem.
1686 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1693 proc_create("fb", 0, NULL, &fb_proc_fops);
1695 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1696 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1698 fb_class = class_create(THIS_MODULE, "graphics");
1699 if (IS_ERR(fb_class)) {
1700 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1707 module_init(fbmem_init);
1711 remove_proc_entry("fb", NULL);
1712 class_destroy(fb_class);
1713 unregister_chrdev(FB_MAJOR, "fb");
1716 module_exit(fbmem_exit);
1717 MODULE_LICENSE("GPL");
1718 MODULE_DESCRIPTION("Framebuffer base");
1720 subsys_initcall(fbmem_init);
1723 int fb_new_modelist(struct fb_info *info)
1725 struct fb_event event;
1726 struct fb_var_screeninfo var = info->var;
1727 struct list_head *pos, *n;
1728 struct fb_modelist *modelist;
1729 struct fb_videomode *m, mode;
1732 list_for_each_safe(pos, n, &info->modelist) {
1733 modelist = list_entry(pos, struct fb_modelist, list);
1734 m = &modelist->mode;
1735 fb_videomode_to_var(&var, m);
1736 var.activate = FB_ACTIVATE_TEST;
1737 err = fb_set_var(info, &var);
1738 fb_var_to_videomode(&mode, &var);
1739 if (err || !fb_mode_is_equal(m, &mode)) {
1747 if (!list_empty(&info->modelist)) {
1748 if (!lock_fb_info(info))
1751 err = fb_notifier_call_chain(FB_EVENT_NEW_MODELIST, &event);
1752 unlock_fb_info(info);
1758 static char *video_options[FB_MAX] __read_mostly;
1759 static int ofonly __read_mostly;
1762 * fb_get_options - get kernel boot parameters
1763 * @name: framebuffer name as it would appear in
1764 * the boot parameter line
1765 * (video=<name>:<options>)
1766 * @option: the option will be stored here
1768 * NOTE: Needed to maintain backwards compatibility
1770 int fb_get_options(char *name, char **option)
1772 char *opt, *options = NULL;
1774 int name_len = strlen(name), i;
1776 if (name_len && ofonly && strncmp(name, "offb", 4))
1779 if (name_len && !retval) {
1780 for (i = 0; i < FB_MAX; i++) {
1781 if (video_options[i] == NULL)
1783 if (!video_options[i][0])
1785 opt = video_options[i];
1786 if (!strncmp(name, opt, name_len) &&
1787 opt[name_len] == ':')
1788 options = opt + name_len + 1;
1791 if (options && !strncmp(options, "off", 3))
1802 * video_setup - process command line options
1803 * @options: string of options
1805 * Process command line options for frame buffer subsystem.
1807 * NOTE: This function is a __setup and __init function.
1808 * It only stores the options. Drivers have to call
1809 * fb_get_options() as necessary.
1814 static int __init video_setup(char *options)
1818 if (!options || !*options)
1821 if (!global && !strncmp(options, "ofonly", 6)) {
1826 if (!global && !strchr(options, ':')) {
1827 fb_mode_option = options;
1832 for (i = 0; i < FB_MAX; i++) {
1833 if (video_options[i] == NULL) {
1834 video_options[i] = options;
1843 __setup("video=", video_setup);
1847 * Visible symbols for modules
1850 EXPORT_SYMBOL(register_framebuffer);
1851 EXPORT_SYMBOL(unregister_framebuffer);
1852 EXPORT_SYMBOL(num_registered_fb);
1853 EXPORT_SYMBOL(registered_fb);
1854 EXPORT_SYMBOL(fb_show_logo);
1855 EXPORT_SYMBOL(fb_set_var);
1856 EXPORT_SYMBOL(fb_blank);
1857 EXPORT_SYMBOL(fb_pan_display);
1858 EXPORT_SYMBOL(fb_get_buffer_offset);
1859 EXPORT_SYMBOL(fb_set_suspend);
1860 EXPORT_SYMBOL(fb_get_options);
1862 MODULE_LICENSE("GPL");