2 * linux/drivers/video/fbmem.c
4 * Copyright (C) 1994 Martin Schaller
6 * 2001 - Documented with DocBook
7 * - Brad Douglas <brad@neruo.com>
9 * This file is subject to the terms and conditions of the GNU General Public
10 * License. See the file COPYING in the main directory of this archive
14 #include <linux/config.h>
15 #include <linux/module.h>
17 #include <linux/types.h>
18 #include <linux/errno.h>
19 #include <linux/sched.h>
20 #include <linux/smp_lock.h>
21 #include <linux/kernel.h>
22 #include <linux/major.h>
23 #include <linux/slab.h>
25 #include <linux/mman.h>
26 #include <linux/tty.h>
27 #include <linux/init.h>
28 #include <linux/linux_logo.h>
29 #include <linux/proc_fs.h>
30 #include <linux/console.h>
32 #include <linux/kmod.h>
34 #include <linux/devfs_fs_kernel.h>
35 #include <linux/err.h>
36 #include <linux/kernel.h>
37 #include <linux/device.h>
38 #include <linux/efi.h>
40 #if defined(__mc68000__) || defined(CONFIG_APUS)
41 #include <asm/setup.h>
45 #include <asm/uaccess.h>
47 #include <asm/pgtable.h>
52 * Frame buffer device initialization and setup routines
55 #define FBPIXMAPSIZE (1024 * 8)
57 static struct notifier_block *fb_notifier_list;
58 struct fb_info *registered_fb[FB_MAX];
59 int num_registered_fb;
65 int fb_get_color_depth(struct fb_var_screeninfo *var,
66 struct fb_fix_screeninfo *fix)
70 if (fix->visual == FB_VISUAL_MONO01 ||
71 fix->visual == FB_VISUAL_MONO10)
74 if (var->green.length == var->blue.length &&
75 var->green.length == var->red.length &&
76 var->green.offset == var->blue.offset &&
77 var->green.offset == var->red.offset)
78 depth = var->green.length;
80 depth = var->green.length + var->red.length +
86 EXPORT_SYMBOL(fb_get_color_depth);
89 * Data padding functions.
91 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
95 for (i = height; i--; ) {
96 /* s_pitch is a few bytes at the most, memcpy is suboptimal */
97 for (j = 0; j < s_pitch; j++)
103 EXPORT_SYMBOL(fb_pad_aligned_buffer);
105 void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height,
106 u32 shift_high, u32 shift_low, u32 mod)
108 u8 mask = (u8) (0xfff << shift_high), tmp;
111 for (i = height; i--; ) {
112 for (j = 0; j < idx; j++) {
115 tmp |= *src >> shift_low;
117 tmp = *src << shift_high;
123 tmp |= *src >> shift_low;
125 if (shift_high < mod) {
126 tmp = *src << shift_high;
133 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
136 * we need to lock this section since fb_cursor
137 * may use fb_imageblit()
139 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
141 u32 align = buf->buf_align - 1, offset;
142 char *addr = buf->addr;
144 /* If IO mapped, we need to sync before access, no sharing of
147 if (buf->flags & FB_PIXMAP_IO) {
148 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
149 info->fbops->fb_sync(info);
153 /* See if we fit in the remaining pixmap space */
154 offset = buf->offset + align;
156 if (offset + size > buf->size) {
157 /* We do not fit. In order to be able to re-use the buffer,
158 * we must ensure no asynchronous DMA'ing or whatever operation
159 * is in progress, we sync for that.
161 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
162 info->fbops->fb_sync(info);
165 buf->offset = offset + size;
172 #include <linux/linux_logo.h>
174 static inline unsigned safe_shift(unsigned d, int n)
176 return n < 0 ? d >> -n : d << n;
179 static void fb_set_logocmap(struct fb_info *info,
180 const struct linux_logo *logo)
182 struct fb_cmap palette_cmap;
183 u16 palette_green[16];
184 u16 palette_blue[16];
187 const unsigned char *clut = logo->clut;
189 palette_cmap.start = 0;
190 palette_cmap.len = 16;
191 palette_cmap.red = palette_red;
192 palette_cmap.green = palette_green;
193 palette_cmap.blue = palette_blue;
194 palette_cmap.transp = NULL;
196 for (i = 0; i < logo->clutsize; i += n) {
197 n = logo->clutsize - i;
198 /* palette_cmap provides space for only 16 colors at once */
201 palette_cmap.start = 32 + i;
202 palette_cmap.len = n;
203 for (j = 0; j < n; ++j) {
204 palette_cmap.red[j] = clut[0] << 8 | clut[0];
205 palette_cmap.green[j] = clut[1] << 8 | clut[1];
206 palette_cmap.blue[j] = clut[2] << 8 | clut[2];
209 fb_set_cmap(&palette_cmap, info);
213 static void fb_set_logo_truepalette(struct fb_info *info,
214 const struct linux_logo *logo,
217 unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
218 unsigned char redmask, greenmask, bluemask;
219 int redshift, greenshift, blueshift;
221 const unsigned char *clut = logo->clut;
224 * We have to create a temporary palette since console palette is only
227 /* Bug: Doesn't obey msb_right ... (who needs that?) */
228 redmask = mask[info->var.red.length < 8 ? info->var.red.length : 8];
229 greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
230 bluemask = mask[info->var.blue.length < 8 ? info->var.blue.length : 8];
231 redshift = info->var.red.offset - (8 - info->var.red.length);
232 greenshift = info->var.green.offset - (8 - info->var.green.length);
233 blueshift = info->var.blue.offset - (8 - info->var.blue.length);
235 for ( i = 0; i < logo->clutsize; i++) {
236 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
237 safe_shift((clut[1] & greenmask), greenshift) |
238 safe_shift((clut[2] & bluemask), blueshift));
243 static void fb_set_logo_directpalette(struct fb_info *info,
244 const struct linux_logo *logo,
247 int redshift, greenshift, blueshift;
250 redshift = info->var.red.offset;
251 greenshift = info->var.green.offset;
252 blueshift = info->var.blue.offset;
254 for (i = 32; i < logo->clutsize; i++)
255 palette[i] = i << redshift | i << greenshift | i << blueshift;
258 static void fb_set_logo(struct fb_info *info,
259 const struct linux_logo *logo, u8 *dst,
263 const u8 *src = logo->data;
264 u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
267 if (fb_get_color_depth(&info->var, &info->fix) == 3)
270 if (info->fix.visual == FB_VISUAL_MONO01 ||
271 info->fix.visual == FB_VISUAL_MONO10)
272 fg = ~((u8) (0xfff << info->var.green.length));
276 for (i = 0; i < logo->height; i++)
277 for (j = 0; j < logo->width; src++) {
280 if (j < logo->width) {
281 *dst++ = *src & 0x0f;
287 for (i = 0; i < logo->height; i++) {
288 for (j = 0; j < logo->width; src++) {
290 for (k = 7; k >= 0; k--) {
291 *dst++ = ((d >> k) & 1) ? fg : 0;
301 * Three (3) kinds of logo maps exist. linux_logo_clut224 (>16 colors),
302 * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors). Depending on
303 * the visual format and color depth of the framebuffer, the DAC, the
304 * pseudo_palette, and the logo data will be adjusted accordingly.
306 * Case 1 - linux_logo_clut224:
307 * Color exceeds the number of console colors (16), thus we set the hardware DAC
308 * using fb_set_cmap() appropriately. The "needs_cmapreset" flag will be set.
310 * For visuals that require color info from the pseudo_palette, we also construct
311 * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
314 * Case 2 - linux_logo_vga16:
315 * The number of colors just matches the console colors, thus there is no need
316 * to set the DAC or the pseudo_palette. However, the bitmap is packed, ie,
317 * each byte contains color information for two pixels (upper and lower nibble).
318 * To be consistent with fb_imageblit() usage, we therefore separate the two
319 * nibbles into separate bytes. The "depth" flag will be set to 4.
321 * Case 3 - linux_logo_mono:
322 * This is similar with Case 2. Each byte contains information for 8 pixels.
323 * We isolate each bit and expand each into a byte. The "depth" flag will
326 static struct logo_data {
328 int needs_directpalette;
329 int needs_truepalette;
331 const struct linux_logo *logo;
334 int fb_prepare_logo(struct fb_info *info)
336 int depth = fb_get_color_depth(&info->var, &info->fix);
338 memset(&fb_logo, 0, sizeof(struct logo_data));
340 if (info->flags & FBINFO_MISC_TILEBLITTING)
343 if (info->fix.visual == FB_VISUAL_DIRECTCOLOR) {
344 depth = info->var.blue.length;
345 if (info->var.red.length < depth)
346 depth = info->var.red.length;
347 if (info->var.green.length < depth)
348 depth = info->var.green.length;
352 switch (info->fix.visual) {
353 case FB_VISUAL_TRUECOLOR:
354 fb_logo.needs_truepalette = 1;
356 case FB_VISUAL_DIRECTCOLOR:
357 fb_logo.needs_directpalette = 1;
358 fb_logo.needs_cmapreset = 1;
360 case FB_VISUAL_PSEUDOCOLOR:
361 fb_logo.needs_cmapreset = 1;
366 /* Return if no suitable logo was found */
367 fb_logo.logo = fb_find_logo(depth);
369 if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
373 /* What depth we asked for might be different from what we get */
374 if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
376 else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
380 return fb_logo.logo->height;
383 int fb_show_logo(struct fb_info *info)
385 u32 *palette = NULL, *saved_pseudo_palette = NULL;
386 unsigned char *logo_new = NULL;
387 struct fb_image image;
390 /* Return if the frame buffer is not mapped or suspended */
391 if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
395 image.data = fb_logo.logo->data;
397 if (fb_logo.needs_cmapreset)
398 fb_set_logocmap(info, fb_logo.logo);
400 if (fb_logo.needs_truepalette ||
401 fb_logo.needs_directpalette) {
402 palette = kmalloc(256 * 4, GFP_KERNEL);
406 if (fb_logo.needs_truepalette)
407 fb_set_logo_truepalette(info, fb_logo.logo, palette);
409 fb_set_logo_directpalette(info, fb_logo.logo, palette);
411 saved_pseudo_palette = info->pseudo_palette;
412 info->pseudo_palette = palette;
415 if (fb_logo.depth <= 4) {
416 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
418 if (logo_new == NULL) {
420 if (saved_pseudo_palette)
421 info->pseudo_palette = saved_pseudo_palette;
424 image.data = logo_new;
425 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
428 image.width = fb_logo.logo->width;
429 image.height = fb_logo.logo->height;
432 for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
433 x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
435 info->fbops->fb_imageblit(info, &image);
439 if (saved_pseudo_palette != NULL)
440 info->pseudo_palette = saved_pseudo_palette;
442 return fb_logo.logo->height;
445 int fb_prepare_logo(struct fb_info *info) { return 0; }
446 int fb_show_logo(struct fb_info *info) { return 0; }
447 #endif /* CONFIG_LOGO */
449 static int fbmem_read_proc(char *buf, char **start, off_t offset,
450 int len, int *eof, void *private)
456 for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++)
458 clen += sprintf(buf + clen, "%d %s\n",
461 *start = buf + offset;
466 return clen < len ? clen : len;
470 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
472 unsigned long p = *ppos;
473 struct inode *inode = file->f_dentry->d_inode;
474 int fbidx = iminor(inode);
475 struct fb_info *info = registered_fb[fbidx];
478 int c, i, cnt = 0, err = 0;
479 unsigned long total_size;
481 if (!info || ! info->screen_base)
484 if (info->state != FBINFO_STATE_RUNNING)
487 if (info->fbops->fb_read)
488 return info->fbops->fb_read(file, buf, count, ppos);
490 total_size = info->screen_size;
492 total_size = info->fix.smem_len;
496 if (count >= total_size)
498 if (count + p > total_size)
499 count = total_size - p;
502 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
507 src = (u32 __iomem *) (info->screen_base + p);
509 if (info->fbops->fb_sync)
510 info->fbops->fb_sync(info);
513 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
515 for (i = c >> 2; i--; )
516 *dst++ = fb_readl(src++);
518 u8 *dst8 = (u8 *) dst;
519 u8 __iomem *src8 = (u8 __iomem *) src;
521 for (i = c & 3; i--;)
522 *dst8++ = fb_readb(src8++);
524 src = (u32 __iomem *) src8;
527 if (copy_to_user(buf, buffer, c)) {
538 return (err) ? err : cnt;
542 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
544 unsigned long p = *ppos;
545 struct inode *inode = file->f_dentry->d_inode;
546 int fbidx = iminor(inode);
547 struct fb_info *info = registered_fb[fbidx];
550 int c, i, cnt = 0, err;
551 unsigned long total_size;
553 if (!info || !info->screen_base)
556 if (info->state != FBINFO_STATE_RUNNING)
559 if (info->fbops->fb_write)
560 return info->fbops->fb_write(file, buf, count, ppos);
562 total_size = info->screen_size;
564 total_size = info->fix.smem_len;
568 if (count >= total_size)
571 if (count + p > total_size) {
572 count = total_size - p;
576 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
581 dst = (u32 __iomem *) (info->screen_base + p);
583 if (info->fbops->fb_sync)
584 info->fbops->fb_sync(info);
587 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
589 if (copy_from_user(src, buf, c)) {
593 for (i = c >> 2; i--; )
594 fb_writel(*src++, dst++);
596 u8 *src8 = (u8 *) src;
597 u8 __iomem *dst8 = (u8 __iomem *) dst;
599 for (i = c & 3; i--; )
600 fb_writeb(*src8++, dst8++);
602 dst = (u32 __iomem *) dst8;
611 return (err) ? err : cnt;
615 static void try_to_load(int fb)
617 request_module("fb%d", fb);
619 #endif /* CONFIG_KMOD */
622 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
624 int xoffset = var->xoffset;
625 int yoffset = var->yoffset;
628 if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
629 xoffset + info->var.xres > info->var.xres_virtual ||
630 yoffset + info->var.yres > info->var.yres_virtual)
632 if ((err = info->fbops->fb_pan_display(var, info)))
634 info->var.xoffset = var->xoffset;
635 info->var.yoffset = var->yoffset;
636 if (var->vmode & FB_VMODE_YWRAP)
637 info->var.vmode |= FB_VMODE_YWRAP;
639 info->var.vmode &= ~FB_VMODE_YWRAP;
644 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
646 int err, flags = info->flags;
648 if (var->activate & FB_ACTIVATE_INV_MODE) {
649 struct fb_videomode mode1, mode2;
652 fb_var_to_videomode(&mode1, var);
653 fb_var_to_videomode(&mode2, &info->var);
654 /* make sure we don't delete the videomode of current var */
655 ret = fb_mode_is_equal(&mode1, &mode2);
658 struct fb_event event;
662 ret = notifier_call_chain(&fb_notifier_list,
663 FB_EVENT_MODE_DELETE, &event);
667 fb_delete_videomode(&mode1, &info->modelist);
672 if ((var->activate & FB_ACTIVATE_FORCE) ||
673 memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
674 if (!info->fbops->fb_check_var) {
679 if ((err = info->fbops->fb_check_var(var, info)))
682 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
683 struct fb_videomode mode;
687 if (info->fbops->fb_set_par)
688 info->fbops->fb_set_par(info);
690 fb_pan_display(info, &info->var);
692 fb_set_cmap(&info->cmap, info);
694 fb_var_to_videomode(&mode, &info->var);
696 if (info->modelist.prev && info->modelist.next &&
697 !list_empty(&info->modelist))
698 err = fb_add_videomode(&mode, &info->modelist);
700 if (!err && (flags & FBINFO_MISC_USEREVENT)) {
701 struct fb_event event;
702 int evnt = (var->activate & FB_ACTIVATE_ALL) ?
703 FB_EVENT_MODE_CHANGE_ALL :
704 FB_EVENT_MODE_CHANGE;
706 info->flags &= ~FBINFO_MISC_USEREVENT;
708 notifier_call_chain(&fb_notifier_list, evnt,
717 fb_blank(struct fb_info *info, int blank)
721 if (blank > FB_BLANK_POWERDOWN)
722 blank = FB_BLANK_POWERDOWN;
724 if (info->fbops->fb_blank)
725 ret = info->fbops->fb_blank(blank, info);
728 struct fb_event event;
732 notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event);
739 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
742 int fbidx = iminor(inode);
743 struct fb_info *info = registered_fb[fbidx];
744 struct fb_ops *fb = info->fbops;
745 struct fb_var_screeninfo var;
746 struct fb_fix_screeninfo fix;
747 struct fb_con2fbmap con2fb;
748 struct fb_cmap_user cmap;
749 struct fb_event event;
750 void __user *argp = (void __user *)arg;
756 case FBIOGET_VSCREENINFO:
757 return copy_to_user(argp, &info->var,
758 sizeof(var)) ? -EFAULT : 0;
759 case FBIOPUT_VSCREENINFO:
760 if (copy_from_user(&var, argp, sizeof(var)))
762 acquire_console_sem();
763 info->flags |= FBINFO_MISC_USEREVENT;
764 i = fb_set_var(info, &var);
765 info->flags &= ~FBINFO_MISC_USEREVENT;
766 release_console_sem();
768 if (copy_to_user(argp, &var, sizeof(var)))
771 case FBIOGET_FSCREENINFO:
772 return copy_to_user(argp, &info->fix,
773 sizeof(fix)) ? -EFAULT : 0;
775 if (copy_from_user(&cmap, argp, sizeof(cmap)))
777 return (fb_set_user_cmap(&cmap, info));
779 if (copy_from_user(&cmap, argp, sizeof(cmap)))
781 return fb_cmap_to_user(&info->cmap, &cmap);
782 case FBIOPAN_DISPLAY:
783 if (copy_from_user(&var, argp, sizeof(var)))
785 acquire_console_sem();
786 i = fb_pan_display(info, &var);
787 release_console_sem();
790 if (copy_to_user(argp, &var, sizeof(var)))
795 case FBIOGET_CON2FBMAP:
796 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
798 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
800 con2fb.framebuffer = -1;
802 event.data = &con2fb;
803 notifier_call_chain(&fb_notifier_list,
804 FB_EVENT_GET_CONSOLE_MAP, &event);
805 return copy_to_user(argp, &con2fb,
806 sizeof(con2fb)) ? -EFAULT : 0;
807 case FBIOPUT_CON2FBMAP:
808 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
810 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
812 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
815 if (!registered_fb[con2fb.framebuffer])
816 try_to_load(con2fb.framebuffer);
817 #endif /* CONFIG_KMOD */
818 if (!registered_fb[con2fb.framebuffer])
821 event.data = &con2fb;
822 return notifier_call_chain(&fb_notifier_list,
823 FB_EVENT_SET_CONSOLE_MAP,
826 acquire_console_sem();
827 info->flags |= FBINFO_MISC_USEREVENT;
828 i = fb_blank(info, arg);
829 info->flags &= ~FBINFO_MISC_USEREVENT;
830 release_console_sem();
833 if (fb->fb_ioctl == NULL)
835 return fb->fb_ioctl(inode, file, cmd, arg, info);
841 fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
843 int fbidx = iminor(file->f_dentry->d_inode);
844 struct fb_info *info = registered_fb[fbidx];
845 struct fb_ops *fb = info->fbops;
848 if (fb->fb_compat_ioctl == NULL)
851 ret = fb->fb_compat_ioctl(file, cmd, arg, info);
858 fb_mmap(struct file *file, struct vm_area_struct * vma)
860 int fbidx = iminor(file->f_dentry->d_inode);
861 struct fb_info *info = registered_fb[fbidx];
862 struct fb_ops *fb = info->fbops;
864 #if !defined(__sparc__) || defined(__sparc_v9__)
869 if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
871 off = vma->vm_pgoff << PAGE_SHIFT;
877 res = fb->fb_mmap(info, file, vma);
882 #if defined(__sparc__) && !defined(__sparc_v9__)
883 /* Should never get here, all fb drivers should have their own
890 /* frame buffer memory */
891 start = info->fix.smem_start;
892 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
894 /* memory mapped io */
896 if (info->var.accel_flags) {
900 start = info->fix.mmio_start;
901 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
905 if ((vma->vm_end - vma->vm_start + off) > len)
908 vma->vm_pgoff = off >> PAGE_SHIFT;
909 /* This is an IO map - tell maydump to skip this VMA */
910 vma->vm_flags |= VM_IO | VM_RESERVED;
911 #if defined(__sparc_v9__)
912 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
913 vma->vm_end - vma->vm_start, vma->vm_page_prot))
916 #if defined(__mc68000__)
917 #if defined(CONFIG_SUN3)
918 pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
919 #elif defined(CONFIG_MMU)
920 if (CPU_IS_020_OR_030)
921 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
922 if (CPU_IS_040_OR_060) {
923 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
924 /* Use no-cache mode, serialized */
925 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
928 #elif defined(__powerpc__)
929 vma->vm_page_prot = phys_mem_access_prot(file, off,
930 vma->vm_end - vma->vm_start,
932 #elif defined(__alpha__)
933 /* Caching is off in the I/O space quadrant by design. */
934 #elif defined(__i386__) || defined(__x86_64__)
935 if (boot_cpu_data.x86 > 3)
936 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
937 #elif defined(__mips__)
938 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
939 #elif defined(__hppa__)
940 pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
941 #elif defined(__arm__) || defined(__sh__) || defined(__m32r__)
942 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
943 #elif defined(__ia64__)
944 if (efi_range_is_wc(vma->vm_start, vma->vm_end - vma->vm_start))
945 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
947 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
949 #warning What do we have to do here??
951 if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
952 vma->vm_end - vma->vm_start, vma->vm_page_prot))
954 #endif /* !__sparc_v9__ */
956 #endif /* !sparc32 */
960 fb_open(struct inode *inode, struct file *file)
962 int fbidx = iminor(inode);
963 struct fb_info *info;
969 if (!(info = registered_fb[fbidx]))
971 #endif /* CONFIG_KMOD */
972 if (!(info = registered_fb[fbidx]))
974 if (!try_module_get(info->fbops->owner))
976 if (info->fbops->fb_open) {
977 res = info->fbops->fb_open(info,1);
979 module_put(info->fbops->owner);
985 fb_release(struct inode *inode, struct file *file)
987 int fbidx = iminor(inode);
988 struct fb_info *info;
991 info = registered_fb[fbidx];
992 if (info->fbops->fb_release)
993 info->fbops->fb_release(info,1);
994 module_put(info->fbops->owner);
999 static struct file_operations fb_fops = {
1000 .owner = THIS_MODULE,
1004 #ifdef CONFIG_COMPAT
1005 .compat_ioctl = fb_compat_ioctl,
1009 .release = fb_release,
1010 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1011 .get_unmapped_area = get_fb_unmapped_area,
1015 static struct class *fb_class;
1018 * register_framebuffer - registers a frame buffer device
1019 * @fb_info: frame buffer info structure
1021 * Registers a frame buffer device @fb_info.
1023 * Returns negative errno on error, or zero for success.
1028 register_framebuffer(struct fb_info *fb_info)
1031 struct fb_event event;
1032 struct fb_videomode mode;
1034 if (num_registered_fb == FB_MAX)
1036 num_registered_fb++;
1037 for (i = 0 ; i < FB_MAX; i++)
1038 if (!registered_fb[i])
1042 fb_info->class_device = class_device_create(fb_class, MKDEV(FB_MAJOR, i),
1043 fb_info->device, "fb%d", i);
1044 if (IS_ERR(fb_info->class_device)) {
1046 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device));
1047 fb_info->class_device = NULL;
1049 fb_init_class_device(fb_info);
1051 if (fb_info->pixmap.addr == NULL) {
1052 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1053 if (fb_info->pixmap.addr) {
1054 fb_info->pixmap.size = FBPIXMAPSIZE;
1055 fb_info->pixmap.buf_align = 1;
1056 fb_info->pixmap.scan_align = 1;
1057 fb_info->pixmap.access_align = 32;
1058 fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1061 fb_info->pixmap.offset = 0;
1063 if (!fb_info->modelist.prev || !fb_info->modelist.next)
1064 INIT_LIST_HEAD(&fb_info->modelist);
1066 fb_var_to_videomode(&mode, &fb_info->var);
1067 fb_add_videomode(&mode, &fb_info->modelist);
1068 registered_fb[i] = fb_info;
1070 devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1071 S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1072 event.info = fb_info;
1073 notifier_call_chain(&fb_notifier_list,
1074 FB_EVENT_FB_REGISTERED, &event);
1080 * unregister_framebuffer - releases a frame buffer device
1081 * @fb_info: frame buffer info structure
1083 * Unregisters a frame buffer device @fb_info.
1085 * Returns negative errno on error, or zero for success.
1090 unregister_framebuffer(struct fb_info *fb_info)
1095 if (!registered_fb[i])
1097 devfs_remove("fb/%d", i);
1099 if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1100 kfree(fb_info->pixmap.addr);
1101 fb_destroy_modelist(&fb_info->modelist);
1102 registered_fb[i]=NULL;
1103 num_registered_fb--;
1104 fb_cleanup_class_device(fb_info);
1105 class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1110 * fb_register_client - register a client notifier
1111 * @nb: notifier block to callback on events
1113 int fb_register_client(struct notifier_block *nb)
1115 return notifier_chain_register(&fb_notifier_list, nb);
1119 * fb_unregister_client - unregister a client notifier
1120 * @nb: notifier block to callback on events
1122 int fb_unregister_client(struct notifier_block *nb)
1124 return notifier_chain_unregister(&fb_notifier_list, nb);
1128 * fb_set_suspend - low level driver signals suspend
1129 * @info: framebuffer affected
1130 * @state: 0 = resuming, !=0 = suspending
1132 * This is meant to be used by low level drivers to
1133 * signal suspend/resume to the core & clients.
1134 * It must be called with the console semaphore held
1136 void fb_set_suspend(struct fb_info *info, int state)
1138 struct fb_event event;
1142 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event);
1143 info->state = FBINFO_STATE_SUSPENDED;
1145 info->state = FBINFO_STATE_RUNNING;
1146 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event);
1151 * fbmem_init - init frame buffer subsystem
1153 * Initialize the frame buffer subsystem.
1155 * NOTE: This function is _only_ to be called by drivers/char/mem.c.
1162 create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1165 if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1166 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1168 fb_class = class_create(THIS_MODULE, "graphics");
1169 if (IS_ERR(fb_class)) {
1170 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1177 module_init(fbmem_init);
1181 class_destroy(fb_class);
1182 unregister_chrdev(FB_MAJOR, "fb");
1185 module_exit(fbmem_exit);
1186 MODULE_LICENSE("GPL");
1187 MODULE_DESCRIPTION("Framebuffer base");
1189 subsys_initcall(fbmem_init);
1192 int fb_new_modelist(struct fb_info *info)
1194 struct fb_event event;
1195 struct fb_var_screeninfo var = info->var;
1196 struct list_head *pos, *n;
1197 struct fb_modelist *modelist;
1198 struct fb_videomode *m, mode;
1201 list_for_each_safe(pos, n, &info->modelist) {
1202 modelist = list_entry(pos, struct fb_modelist, list);
1203 m = &modelist->mode;
1204 fb_videomode_to_var(&var, m);
1205 var.activate = FB_ACTIVATE_TEST;
1206 err = fb_set_var(info, &var);
1207 fb_var_to_videomode(&mode, &var);
1208 if (err || !fb_mode_is_equal(m, &mode)) {
1216 if (!list_empty(&info->modelist)) {
1218 err = notifier_call_chain(&fb_notifier_list,
1219 FB_EVENT_NEW_MODELIST,
1226 static char *video_options[FB_MAX];
1229 extern const char *global_mode_option;
1232 * fb_get_options - get kernel boot parameters
1233 * @name: framebuffer name as it would appear in
1234 * the boot parameter line
1235 * (video=<name>:<options>)
1236 * @option: the option will be stored here
1238 * NOTE: Needed to maintain backwards compatibility
1240 int fb_get_options(char *name, char **option)
1242 char *opt, *options = NULL;
1243 int opt_len, retval = 0;
1244 int name_len = strlen(name), i;
1246 if (name_len && ofonly && strncmp(name, "offb", 4))
1249 if (name_len && !retval) {
1250 for (i = 0; i < FB_MAX; i++) {
1251 if (video_options[i] == NULL)
1253 opt_len = strlen(video_options[i]);
1256 opt = video_options[i];
1257 if (!strncmp(name, opt, name_len) &&
1258 opt[name_len] == ':')
1259 options = opt + name_len + 1;
1262 if (options && !strncmp(options, "off", 3))
1272 * video_setup - process command line options
1273 * @options: string of options
1275 * Process command line options for frame buffer subsystem.
1277 * NOTE: This function is a __setup and __init function.
1278 * It only stores the options. Drivers have to call
1279 * fb_get_options() as necessary.
1284 static int __init video_setup(char *options)
1288 if (!options || !*options)
1291 if (!global && !strncmp(options, "ofonly", 6)) {
1296 if (!global && !strstr(options, "fb:")) {
1297 global_mode_option = options;
1302 for (i = 0; i < FB_MAX; i++) {
1303 if (video_options[i] == NULL) {
1304 video_options[i] = options;
1313 __setup("video=", video_setup);
1316 * Visible symbols for modules
1319 EXPORT_SYMBOL(register_framebuffer);
1320 EXPORT_SYMBOL(unregister_framebuffer);
1321 EXPORT_SYMBOL(num_registered_fb);
1322 EXPORT_SYMBOL(registered_fb);
1323 EXPORT_SYMBOL(fb_prepare_logo);
1324 EXPORT_SYMBOL(fb_show_logo);
1325 EXPORT_SYMBOL(fb_set_var);
1326 EXPORT_SYMBOL(fb_blank);
1327 EXPORT_SYMBOL(fb_pan_display);
1328 EXPORT_SYMBOL(fb_get_buffer_offset);
1329 EXPORT_SYMBOL(fb_set_suspend);
1330 EXPORT_SYMBOL(fb_register_client);
1331 EXPORT_SYMBOL(fb_unregister_client);
1332 EXPORT_SYMBOL(fb_get_options);
1333 EXPORT_SYMBOL(fb_new_modelist);
1335 MODULE_LICENSE("GPL");