drivers/video/fbmem.c

   1 /*
   2  *  linux/drivers/video/fbmem.c
   3  *
   4  *  Copyright (C) 1994 Martin Schaller
   5  *
   6  *      2001 - Documented with DocBook
   7  *      - Brad Douglas <brad@neruo.com>
   8  *
   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
  11  * for more details.
  12  */
  13
  14 #include <linux/config.h>
  15 #include <linux/module.h>
  16
  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>
  24 #include <linux/mm.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>
  31 #ifdef CONFIG_KMOD
  32 #include <linux/kmod.h>
  33 #endif
  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>
  39
  40 #if defined(__mc68000__) || defined(CONFIG_APUS)
  41 #include <asm/setup.h>
  42 #endif
  43
  44 #include <asm/io.h>
  45 #include <asm/uaccess.h>
  46 #include <asm/page.h>
  47 #include <asm/pgtable.h>
  48
  49 #include <linux/fb.h>
  50
  51     /*
  52      *  Frame buffer device initialization and setup routines
  53      */
  54
  55 #define FBPIXMAPSIZE    (1024 * 8)
  56
  57 static struct notifier_block *fb_notifier_list;
  58 struct fb_info *registered_fb[FB_MAX];
  59 int num_registered_fb;
  60
  61 /*
  62  * Helpers
  63  */
  64
  65 int fb_get_color_depth(struct fb_var_screeninfo *var,
  66                        struct fb_fix_screeninfo *fix)
  67 {
  68         int depth = 0;
  69
  70         if (fix->visual == FB_VISUAL_MONO01 ||
  71             fix->visual == FB_VISUAL_MONO10)
  72                 depth = 1;
  73         else {
  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;
  79                 else
  80                         depth = var->green.length + var->red.length +
  81                                 var->blue.length;
  82         }
  83
  84         return depth;
  85 }
  86 EXPORT_SYMBOL(fb_get_color_depth);
  87
  88 /*
  89  * Data padding functions.
  90  */
  91 void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height)
  92 {
  93         int i, j;
  94
  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++)
  98                         dst[j] = src[j];
  99                 src += s_pitch;
 100                 dst += d_pitch;
 101         }
 102 }
 103 EXPORT_SYMBOL(fb_pad_aligned_buffer);
 104
 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)
 107 {
 108         u8 mask = (u8) (0xfff << shift_high), tmp;
 109         int i, j;
 110
 111         for (i = height; i--; ) {
 112                 for (j = 0; j < idx; j++) {
 113                         tmp = dst[j];
 114                         tmp &= mask;
 115                         tmp |= *src >> shift_low;
 116                         dst[j] = tmp;
 117                         tmp = *src << shift_high;
 118                         dst[j+1] = tmp;
 119                         src++;
 120                 }
 121                 tmp = dst[idx];
 122                 tmp &= mask;
 123                 tmp |= *src >> shift_low;
 124                 dst[idx] = tmp;
 125                 if (shift_high < mod) {
 126                         tmp = *src << shift_high;
 127                         dst[idx+1] = tmp;
 128                 }
 129                 src++;
 130                 dst += d_pitch;
 131         }
 132 }
 133 EXPORT_SYMBOL(fb_pad_unaligned_buffer);
 134
 135 /*
 136  * we need to lock this section since fb_cursor
 137  * may use fb_imageblit()
 138  */
 139 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
 140 {
 141         u32 align = buf->buf_align - 1, offset;
 142         char *addr = buf->addr;
 143
 144         /* If IO mapped, we need to sync before access, no sharing of
 145          * the pixmap is done
 146          */
 147         if (buf->flags & FB_PIXMAP_IO) {
 148                 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
 149                         info->fbops->fb_sync(info);
 150                 return addr;
 151         }
 152
 153         /* See if we fit in the remaining pixmap space */
 154         offset = buf->offset + align;
 155         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.
 160                  */
 161                 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
 162                         info->fbops->fb_sync(info);
 163                 offset = 0;
 164         }
 165         buf->offset = offset + size;
 166         addr += offset;
 167
 168         return addr;
 169 }
 170
 171 #ifdef CONFIG_LOGO
 172 #include <linux/linux_logo.h>
 173
 174 static inline unsigned safe_shift(unsigned d, int n)
 175 {
 176         return n < 0 ? d >> -n : d << n;
 177 }
 178
 179 static void fb_set_logocmap(struct fb_info *info,
 180                                    const struct linux_logo *logo)
 181 {
 182         struct fb_cmap palette_cmap;
 183         u16 palette_green[16];
 184         u16 palette_blue[16];
 185         u16 palette_red[16];
 186         int i, j, n;
 187         const unsigned char *clut = logo->clut;
 188
 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;
 195
 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 */
 199                 if (n > 16)
 200                         n = 16;
 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];
 207                         clut += 3;
 208                 }
 209                 fb_set_cmap(&palette_cmap, info);
 210         }
 211 }
 212
 213 static void  fb_set_logo_truepalette(struct fb_info *info,
 214                                             const struct linux_logo *logo,
 215                                             u32 *palette)
 216 {
 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;
 220         int i;
 221         const unsigned char *clut = logo->clut;
 222
 223         /*
 224          * We have to create a temporary palette since console palette is only
 225          * 16 colors long.
 226          */
 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);
 234
 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));
 239                 clut += 3;
 240         }
 241 }
 242
 243 static void fb_set_logo_directpalette(struct fb_info *info,
 244                                              const struct linux_logo *logo,
 245                                              u32 *palette)
 246 {
 247         int redshift, greenshift, blueshift;
 248         int i;
 249
 250         redshift = info->var.red.offset;
 251         greenshift = info->var.green.offset;
 252         blueshift = info->var.blue.offset;
 253
 254         for (i = 32; i < logo->clutsize; i++)
 255                 palette[i] = i << redshift | i << greenshift | i << blueshift;
 256 }
 257
 258 static void fb_set_logo(struct fb_info *info,
 259                                const struct linux_logo *logo, u8 *dst,
 260                                int depth)
 261 {
 262         int i, j, k;
 263         const u8 *src = logo->data;
 264         u8 xor = (info->fix.visual == FB_VISUAL_MONO01) ? 0xff : 0;
 265         u8 fg = 1, d;
 266
 267         if (fb_get_color_depth(&info->var, &info->fix) == 3)
 268                 fg = 7;
 269
 270         if (info->fix.visual == FB_VISUAL_MONO01 ||
 271             info->fix.visual == FB_VISUAL_MONO10)
 272                 fg = ~((u8) (0xfff << info->var.green.length));
 273
 274         switch (depth) {
 275         case 4:
 276                 for (i = 0; i < logo->height; i++)
 277                         for (j = 0; j < logo->width; src++) {
 278                                 *dst++ = *src >> 4;
 279                                 j++;
 280                                 if (j < logo->width) {
 281                                         *dst++ = *src & 0x0f;
 282                                         j++;
 283                                 }
 284                         }
 285                 break;
 286         case 1:
 287                 for (i = 0; i < logo->height; i++) {
 288                         for (j = 0; j < logo->width; src++) {
 289                                 d = *src ^ xor;
 290                                 for (k = 7; k >= 0; k--) {
 291                                         *dst++ = ((d >> k) & 1) ? fg : 0;
 292                                         j++;
 293                                 }
 294                         }
 295                 }
 296                 break;
 297         }
 298 }
 299
 300 /*
 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.
 305  *
 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.
 309  *
 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
 312  * will be set.
 313  *
 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.
 320  *
 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
 324  * be set to 1.
 325  */
 326 static struct logo_data {
 327         int depth;
 328         int needs_directpalette;
 329         int needs_truepalette;
 330         int needs_cmapreset;
 331         const struct linux_logo *logo;
 332 } fb_logo;
 333
 334 int fb_prepare_logo(struct fb_info *info)
 335 {
 336         int depth = fb_get_color_depth(&info->var, &info->fix);
 337
 338         memset(&fb_logo, 0, sizeof(struct logo_data));
 339
 340         if (info->flags & FBINFO_MISC_TILEBLITTING)
 341                 return 0;
 342
 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;
 349         }
 350
 351         if (depth >= 8) {
 352                 switch (info->fix.visual) {
 353                 case FB_VISUAL_TRUECOLOR:
 354                         fb_logo.needs_truepalette = 1;
 355                         break;
 356                 case FB_VISUAL_DIRECTCOLOR:
 357                         fb_logo.needs_directpalette = 1;
 358                         fb_logo.needs_cmapreset = 1;
 359                         break;
 360                 case FB_VISUAL_PSEUDOCOLOR:
 361                         fb_logo.needs_cmapreset = 1;
 362                         break;
 363                 }
 364         }
 365
 366         /* Return if no suitable logo was found */
 367         fb_logo.logo = fb_find_logo(depth);
 368
 369         if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
 370                 fb_logo.logo = NULL;
 371                 return 0;
 372         }
 373         /* What depth we asked for might be different from what we get */
 374         if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
 375                 fb_logo.depth = 8;
 376         else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
 377                 fb_logo.depth = 4;
 378         else
 379                 fb_logo.depth = 1;
 380         return fb_logo.logo->height;
 381 }
 382
 383 int fb_show_logo(struct fb_info *info)
 384 {
 385         u32 *palette = NULL, *saved_pseudo_palette = NULL;
 386         unsigned char *logo_new = NULL;
 387         struct fb_image image;
 388         int x;
 389
 390         /* Return if the frame buffer is not mapped or suspended */
 391         if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
 392                 return 0;
 393
 394         image.depth = 8;
 395         image.data = fb_logo.logo->data;
 396
 397         if (fb_logo.needs_cmapreset)
 398                 fb_set_logocmap(info, fb_logo.logo);
 399
 400         if (fb_logo.needs_truepalette ||
 401             fb_logo.needs_directpalette) {
 402                 palette = kmalloc(256 * 4, GFP_KERNEL);
 403                 if (palette == NULL)
 404                         return 0;
 405
 406                 if (fb_logo.needs_truepalette)
 407                         fb_set_logo_truepalette(info, fb_logo.logo, palette);
 408                 else
 409                         fb_set_logo_directpalette(info, fb_logo.logo, palette);
 410
 411                 saved_pseudo_palette = info->pseudo_palette;
 412                 info->pseudo_palette = palette;
 413         }
 414
 415         if (fb_logo.depth <= 4) {
 416                 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
 417                                    GFP_KERNEL);
 418                 if (logo_new == NULL) {
 419                         kfree(palette);
 420                         if (saved_pseudo_palette)
 421                                 info->pseudo_palette = saved_pseudo_palette;
 422                         return 0;
 423                 }
 424                 image.data = logo_new;
 425                 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
 426         }
 427
 428         image.width = fb_logo.logo->width;
 429         image.height = fb_logo.logo->height;
 430         image.dy = 0;
 431
 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)) {
 434                 image.dx = x;
 435                 info->fbops->fb_imageblit(info, &image);
 436         }
 437
 438         kfree(palette);
 439         if (saved_pseudo_palette != NULL)
 440                 info->pseudo_palette = saved_pseudo_palette;
 441         kfree(logo_new);
 442         return fb_logo.logo->height;
 443 }
 444 #else
 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 */
 448
 449 static int fbmem_read_proc(char *buf, char **start, off_t offset,
 450                            int len, int *eof, void *private)
 451 {
 452         struct fb_info **fi;
 453         int clen;
 454
 455         clen = 0;
 456         for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
 457                 if (*fi)
 458                         clen += sprintf(buf + clen, "%d %s\n",
 459                                         (*fi)->node,
 460                                         (*fi)->fix.id);
 461         *start = buf + offset;
 462         if (clen > offset)
 463                 clen -= offset;
 464         else
 465                 clen = 0;
 466         return clen < len ? clen : len;
 467 }
 468
 469 static ssize_t
 470 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 471 {
 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];
 476         u32 *buffer, *dst;
 477         u32 __iomem *src;
 478         int c, i, cnt = 0, err = 0;
 479         unsigned long total_size;
 480
 481         if (!info || ! info->screen_base)
 482                 return -ENODEV;
 483
 484         if (info->state != FBINFO_STATE_RUNNING)
 485                 return -EPERM;
 486
 487         if (info->fbops->fb_read)
 488                 return info->fbops->fb_read(file, buf, count, ppos);
 489
 490         total_size = info->screen_size;
 491         if (total_size == 0)
 492                 total_size = info->fix.smem_len;
 493
 494         if (p >= total_size)
 495             return 0;
 496         if (count >= total_size)
 497             count = total_size;
 498         if (count + p > total_size)
 499                 count = total_size - p;
 500
 501         cnt = 0;
 502         buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
 503                          GFP_KERNEL);
 504         if (!buffer)
 505                 return -ENOMEM;
 506
 507         src = (u32 __iomem *) (info->screen_base + p);
 508
 509         if (info->fbops->fb_sync)
 510                 info->fbops->fb_sync(info);
 511
 512         while (count) {
 513                 c  = (count > PAGE_SIZE) ? PAGE_SIZE : count;
 514                 dst = buffer;
 515                 for (i = c >> 2; i--; )
 516                         *dst++ = fb_readl(src++);
 517                 if (c & 3) {
 518                         u8 *dst8 = (u8 *) dst;
 519                         u8 __iomem *src8 = (u8 __iomem *) src;
 520
 521                         for (i = c & 3; i--;)
 522                                 *dst8++ = fb_readb(src8++);
 523
 524                         src = (u32 __iomem *) src8;
 525                 }
 526
 527                 if (copy_to_user(buf, buffer, c)) {
 528                         err = -EFAULT;
 529                         break;
 530                 }
 531                 *ppos += c;
 532                 buf += c;
 533                 cnt += c;
 534                 count -= c;
 535         }
 536
 537         kfree(buffer);
 538         return (err) ? err : cnt;
 539 }
 540
 541 static ssize_t
 542 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 543 {
 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];
 548         u32 *buffer, *src;
 549         u32 __iomem *dst;
 550         int c, i, cnt = 0, err;
 551         unsigned long total_size;
 552
 553         if (!info || !info->screen_base)
 554                 return -ENODEV;
 555
 556         if (info->state != FBINFO_STATE_RUNNING)
 557                 return -EPERM;
 558
 559         if (info->fbops->fb_write)
 560                 return info->fbops->fb_write(file, buf, count, ppos);
 561
 562         total_size = info->screen_size;
 563         if (total_size == 0)
 564                 total_size = info->fix.smem_len;
 565
 566         if (p > total_size)
 567             return -ENOSPC;
 568         if (count >= total_size)
 569             count = total_size;
 570         err = 0;
 571         if (count + p > total_size) {
 572             count = total_size - p;
 573             err = -ENOSPC;
 574         }
 575         cnt = 0;
 576         buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count,
 577                          GFP_KERNEL);
 578         if (!buffer)
 579                 return -ENOMEM;
 580
 581         dst = (u32 __iomem *) (info->screen_base + p);
 582
 583         if (info->fbops->fb_sync)
 584                 info->fbops->fb_sync(info);
 585
 586         while (count) {
 587                 c = (count > PAGE_SIZE) ? PAGE_SIZE : count;
 588                 src = buffer;
 589                 if (copy_from_user(src, buf, c)) {
 590                         err = -EFAULT;
 591                         break;
 592                 }
 593                 for (i = c >> 2; i--; )
 594                         fb_writel(*src++, dst++);
 595                 if (c & 3) {
 596                         u8 *src8 = (u8 *) src;
 597                         u8 __iomem *dst8 = (u8 __iomem *) dst;
 598
 599                         for (i = c & 3; i--; )
 600                                 fb_writeb(*src8++, dst8++);
 601
 602                         dst = (u32 __iomem *) dst8;
 603                 }
 604                 *ppos += c;
 605                 buf += c;
 606                 cnt += c;
 607                 count -= c;
 608         }
 609         kfree(buffer);
 610
 611         return (err) ? err : cnt;
 612 }
 613
 614 #ifdef CONFIG_KMOD
 615 static void try_to_load(int fb)
 616 {
 617         request_module("fb%d", fb);
 618 }
 619 #endif /* CONFIG_KMOD */
 620
 621 int
 622 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
 623 {
 624         int xoffset = var->xoffset;
 625         int yoffset = var->yoffset;
 626         int err;
 627
 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)
 631                 return -EINVAL;
 632         if ((err = info->fbops->fb_pan_display(var, info)))
 633                 return err;
 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;
 638         else
 639                 info->var.vmode &= ~FB_VMODE_YWRAP;
 640         return 0;
 641 }
 642
 643 int
 644 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
 645 {
 646         int err, flags = info->flags;
 647
 648         if (var->activate & FB_ACTIVATE_INV_MODE) {
 649                 struct fb_videomode mode1, mode2;
 650                 int ret = 0;
 651
 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);
 656
 657                 if (!ret) {
 658                     struct fb_event event;
 659
 660                     event.info = info;
 661                     event.data = &mode1;
 662                     ret = notifier_call_chain(&fb_notifier_list,
 663                                               FB_EVENT_MODE_DELETE, &event);
 664                 }
 665
 666                 if (!ret)
 667                     fb_delete_videomode(&mode1, &info->modelist);
 668
 669                 return ret;
 670         }
 671
 672         if ((var->activate & FB_ACTIVATE_FORCE) ||
 673             memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
 674                 if (!info->fbops->fb_check_var) {
 675                         *var = info->var;
 676                         return 0;
 677                 }
 678
 679                 if ((err = info->fbops->fb_check_var(var, info)))
 680                         return err;
 681
 682                 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
 683                         struct fb_videomode mode;
 684                         int err = 0;
 685
 686                         info->var = *var;
 687                         if (info->fbops->fb_set_par)
 688                                 info->fbops->fb_set_par(info);
 689
 690                         fb_pan_display(info, &info->var);
 691
 692                         fb_set_cmap(&info->cmap, info);
 693
 694                         fb_var_to_videomode(&mode, &info->var);
 695
 696                         if (info->modelist.prev && info->modelist.next &&
 697                             !list_empty(&info->modelist))
 698                                 err = fb_add_videomode(&mode, &info->modelist);
 699
 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;
 705
 706                                 info->flags &= ~FBINFO_MISC_USEREVENT;
 707                                 event.info = info;
 708                                 notifier_call_chain(&fb_notifier_list, evnt,
 709                                                     &event);
 710                         }
 711                 }
 712         }
 713         return 0;
 714 }
 715
 716 int
 717 fb_blank(struct fb_info *info, int blank)
 718 {
 719         int ret = -EINVAL;
 720
 721         if (blank > FB_BLANK_POWERDOWN)
 722                 blank = FB_BLANK_POWERDOWN;
 723
 724         if (info->fbops->fb_blank)
 725                 ret = info->fbops->fb_blank(blank, info);
 726
 727         if (!ret) {
 728                 struct fb_event event;
 729
 730                 event.info = info;
 731                 event.data = &blank;
 732                 notifier_call_chain(&fb_notifier_list, FB_EVENT_BLANK, &event);
 733         }
 734
 735         return ret;
 736 }
 737
 738 static int
 739 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 740          unsigned long arg)
 741 {
 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;
 751         int i;
 752
 753         if (!fb)
 754                 return -ENODEV;
 755         switch (cmd) {
 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)))
 761                         return -EFAULT;
 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();
 767                 if (i) return i;
 768                 if (copy_to_user(argp, &var, sizeof(var)))
 769                         return -EFAULT;
 770                 return 0;
 771         case FBIOGET_FSCREENINFO:
 772                 return copy_to_user(argp, &info->fix,
 773                                     sizeof(fix)) ? -EFAULT : 0;
 774         case FBIOPUTCMAP:
 775                 if (copy_from_user(&cmap, argp, sizeof(cmap)))
 776                         return -EFAULT;
 777                 return (fb_set_user_cmap(&cmap, info));
 778         case FBIOGETCMAP:
 779                 if (copy_from_user(&cmap, argp, sizeof(cmap)))
 780                         return -EFAULT;
 781                 return fb_cmap_to_user(&info->cmap, &cmap);
 782         case FBIOPAN_DISPLAY:
 783                 if (copy_from_user(&var, argp, sizeof(var)))
 784                         return -EFAULT;
 785                 acquire_console_sem();
 786                 i = fb_pan_display(info, &var);
 787                 release_console_sem();
 788                 if (i)
 789                         return i;
 790                 if (copy_to_user(argp, &var, sizeof(var)))
 791                         return -EFAULT;
 792                 return 0;
 793         case FBIO_CURSOR:
 794                 return -EINVAL;
 795         case FBIOGET_CON2FBMAP:
 796                 if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
 797                         return -EFAULT;
 798                 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
 799                     return -EINVAL;
 800                 con2fb.framebuffer = -1;
 801                 event.info = info;
 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)))
 809                         return - EFAULT;
 810                 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
 811                     return -EINVAL;
 812                 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
 813                     return -EINVAL;
 814 #ifdef CONFIG_KMOD
 815                 if (!registered_fb[con2fb.framebuffer])
 816                     try_to_load(con2fb.framebuffer);
 817 #endif /* CONFIG_KMOD */
 818                 if (!registered_fb[con2fb.framebuffer])
 819                     return -EINVAL;
 820                 event.info = info;
 821                 event.data = &con2fb;
 822                 return notifier_call_chain(&fb_notifier_list,
 823                                            FB_EVENT_SET_CONSOLE_MAP,
 824                                            &event);
 825         case FBIOBLANK:
 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();
 831                 return i;
 832         default:
 833                 if (fb->fb_ioctl == NULL)
 834                         return -EINVAL;
 835                 return fb->fb_ioctl(inode, file, cmd, arg, info);
 836         }
 837 }
 838
 839 #ifdef CONFIG_COMPAT
 840 static long
 841 fb_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 842 {
 843         int fbidx = iminor(file->f_dentry->d_inode);
 844         struct fb_info *info = registered_fb[fbidx];
 845         struct fb_ops *fb = info->fbops;
 846         long ret;
 847
 848         if (fb->fb_compat_ioctl == NULL)
 849                 return -ENOIOCTLCMD;
 850         lock_kernel();
 851         ret = fb->fb_compat_ioctl(file, cmd, arg, info);
 852         unlock_kernel();
 853         return ret;
 854 }
 855 #endif
 856
 857 static int
 858 fb_mmap(struct file *file, struct vm_area_struct * vma)
 859 {
 860         int fbidx = iminor(file->f_dentry->d_inode);
 861         struct fb_info *info = registered_fb[fbidx];
 862         struct fb_ops *fb = info->fbops;
 863         unsigned long off;
 864 #if !defined(__sparc__) || defined(__sparc_v9__)
 865         unsigned long start;
 866         u32 len;
 867 #endif
 868
 869         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
 870                 return -EINVAL;
 871         off = vma->vm_pgoff << PAGE_SHIFT;
 872         if (!fb)
 873                 return -ENODEV;
 874         if (fb->fb_mmap) {
 875                 int res;
 876                 lock_kernel();
 877                 res = fb->fb_mmap(info, file, vma);
 878                 unlock_kernel();
 879                 return res;
 880         }
 881
 882 #if defined(__sparc__) && !defined(__sparc_v9__)
 883         /* Should never get here, all fb drivers should have their own
 884            mmap routines */
 885         return -EINVAL;
 886 #else
 887         /* !sparc32... */
 888         lock_kernel();
 889
 890         /* frame buffer memory */
 891         start = info->fix.smem_start;
 892         len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
 893         if (off >= len) {
 894                 /* memory mapped io */
 895                 off -= len;
 896                 if (info->var.accel_flags) {
 897                         unlock_kernel();
 898                         return -EINVAL;
 899                 }
 900                 start = info->fix.mmio_start;
 901                 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
 902         }
 903         unlock_kernel();
 904         start &= PAGE_MASK;
 905         if ((vma->vm_end - vma->vm_start + off) > len)
 906                 return -EINVAL;
 907         off += start;
 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))
 914                 return -EAGAIN;
 915 #else
 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;
 926         }
 927 #endif
 928 #elif defined(__powerpc__)
 929         vma->vm_page_prot = phys_mem_access_prot(file, off,
 930                                                  vma->vm_end - vma->vm_start,
 931                                                  vma->vm_page_prot);
 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);
 946         else
 947                 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 948 #else
 949 #warning What do we have to do here??
 950 #endif
 951         if (io_remap_pfn_range(vma, vma->vm_start, off >> PAGE_SHIFT,
 952                              vma->vm_end - vma->vm_start, vma->vm_page_prot))
 953                 return -EAGAIN;
 954 #endif /* !__sparc_v9__ */
 955         return 0;
 956 #endif /* !sparc32 */
 957 }
 958
 959 static int
 960 fb_open(struct inode *inode, struct file *file)
 961 {
 962         int fbidx = iminor(inode);
 963         struct fb_info *info;
 964         int res = 0;
 965
 966         if (fbidx >= FB_MAX)
 967                 return -ENODEV;
 968 #ifdef CONFIG_KMOD
 969         if (!(info = registered_fb[fbidx]))
 970                 try_to_load(fbidx);
 971 #endif /* CONFIG_KMOD */
 972         if (!(info = registered_fb[fbidx]))
 973                 return -ENODEV;
 974         if (!try_module_get(info->fbops->owner))
 975                 return -ENODEV;
 976         if (info->fbops->fb_open) {
 977                 res = info->fbops->fb_open(info,1);
 978                 if (res)
 979                         module_put(info->fbops->owner);
 980         }
 981         return res;
 982 }
 983
 984 static int
 985 fb_release(struct inode *inode, struct file *file)
 986 {
 987         int fbidx = iminor(inode);
 988         struct fb_info *info;
 989
 990         lock_kernel();
 991         info = registered_fb[fbidx];
 992         if (info->fbops->fb_release)
 993                 info->fbops->fb_release(info,1);
 994         module_put(info->fbops->owner);
 995         unlock_kernel();
 996         return 0;
 997 }
 998
 999 static struct file_operations fb_fops = {
1000         .owner =        THIS_MODULE,
1001         .read =         fb_read,
1002         .write =        fb_write,
1003         .ioctl =        fb_ioctl,
1004 #ifdef CONFIG_COMPAT
1005         .compat_ioctl = fb_compat_ioctl,
1006 #endif
1007         .mmap =         fb_mmap,
1008         .open =         fb_open,
1009         .release =      fb_release,
1010 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1011         .get_unmapped_area = get_fb_unmapped_area,
1012 #endif
1013 };
1014
1015 static struct class *fb_class;
1016
1017 /**
1018  *      register_framebuffer - registers a frame buffer device
1019  *      @fb_info: frame buffer info structure
1020  *
1021  *      Registers a frame buffer device @fb_info.
1022  *
1023  *      Returns negative errno on error, or zero for success.
1024  *
1025  */
1026
1027 int
1028 register_framebuffer(struct fb_info *fb_info)
1029 {
1030         int i;
1031         struct fb_event event;
1032
1033         if (num_registered_fb == FB_MAX)
1034                 return -ENXIO;
1035         num_registered_fb++;
1036         for (i = 0 ; i < FB_MAX; i++)
1037                 if (!registered_fb[i])
1038                         break;
1039         fb_info->node = i;
1040
1041         fb_info->class_device = class_device_create(fb_class, MKDEV(FB_MAJOR, i),
1042                                     fb_info->device, "fb%d", i);
1043         if (IS_ERR(fb_info->class_device)) {
1044                 /* Not fatal */
1045                 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(fb_info->class_device));
1046                 fb_info->class_device = NULL;
1047         } else
1048                 fb_init_class_device(fb_info);
1049
1050         if (fb_info->pixmap.addr == NULL) {
1051                 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1052                 if (fb_info->pixmap.addr) {
1053                         fb_info->pixmap.size = FBPIXMAPSIZE;
1054                         fb_info->pixmap.buf_align = 1;
1055                         fb_info->pixmap.scan_align = 1;
1056                         fb_info->pixmap.access_align = 32;
1057                         fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1058                 }
1059         }
1060         fb_info->pixmap.offset = 0;
1061
1062         if (!fb_info->modelist.prev ||
1063             !fb_info->modelist.next ||
1064             list_empty(&fb_info->modelist)) {
1065                 struct fb_videomode mode;
1066
1067                 INIT_LIST_HEAD(&fb_info->modelist);
1068                 fb_var_to_videomode(&mode, &fb_info->var);
1069                 fb_add_videomode(&mode, &fb_info->modelist);
1070         }
1071
1072         registered_fb[i] = fb_info;
1073
1074         devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1075                         S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1076         event.info = fb_info;
1077         notifier_call_chain(&fb_notifier_list,
1078                             FB_EVENT_FB_REGISTERED, &event);
1079         return 0;
1080 }
1081
1082
1083 /**
1084  *      unregister_framebuffer - releases a frame buffer device
1085  *      @fb_info: frame buffer info structure
1086  *
1087  *      Unregisters a frame buffer device @fb_info.
1088  *
1089  *      Returns negative errno on error, or zero for success.
1090  *
1091  */
1092
1093 int
1094 unregister_framebuffer(struct fb_info *fb_info)
1095 {
1096         int i;
1097
1098         i = fb_info->node;
1099         if (!registered_fb[i])
1100                 return -EINVAL;
1101         devfs_remove("fb/%d", i);
1102
1103         if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1104                 kfree(fb_info->pixmap.addr);
1105         fb_destroy_modelist(&fb_info->modelist);
1106         registered_fb[i]=NULL;
1107         num_registered_fb--;
1108         fb_cleanup_class_device(fb_info);
1109         class_device_destroy(fb_class, MKDEV(FB_MAJOR, i));
1110         return 0;
1111 }
1112
1113 /**
1114  *      fb_register_client - register a client notifier
1115  *      @nb: notifier block to callback on events
1116  */
1117 int fb_register_client(struct notifier_block *nb)
1118 {
1119         return notifier_chain_register(&fb_notifier_list, nb);
1120 }
1121
1122 /**
1123  *      fb_unregister_client - unregister a client notifier
1124  *      @nb: notifier block to callback on events
1125  */
1126 int fb_unregister_client(struct notifier_block *nb)
1127 {
1128         return notifier_chain_unregister(&fb_notifier_list, nb);
1129 }
1130
1131 /**
1132  *      fb_set_suspend - low level driver signals suspend
1133  *      @info: framebuffer affected
1134  *      @state: 0 = resuming, !=0 = suspending
1135  *
1136  *      This is meant to be used by low level drivers to
1137  *      signal suspend/resume to the core & clients.
1138  *      It must be called with the console semaphore held
1139  */
1140 void fb_set_suspend(struct fb_info *info, int state)
1141 {
1142         struct fb_event event;
1143
1144         event.info = info;
1145         if (state) {
1146                 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, &event);
1147                 info->state = FBINFO_STATE_SUSPENDED;
1148         } else {
1149                 info->state = FBINFO_STATE_RUNNING;
1150                 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, &event);
1151         }
1152 }
1153
1154 /**
1155  *      fbmem_init - init frame buffer subsystem
1156  *
1157  *      Initialize the frame buffer subsystem.
1158  *
1159  *      NOTE: This function is _only_ to be called by drivers/char/mem.c.
1160  *
1161  */
1162
1163 static int __init
1164 fbmem_init(void)
1165 {
1166         create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1167
1168         devfs_mk_dir("fb");
1169         if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1170                 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1171
1172         fb_class = class_create(THIS_MODULE, "graphics");
1173         if (IS_ERR(fb_class)) {
1174                 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1175                 fb_class = NULL;
1176         }
1177         return 0;
1178 }
1179
1180 #ifdef MODULE
1181 module_init(fbmem_init);
1182 static void __exit
1183 fbmem_exit(void)
1184 {
1185         class_destroy(fb_class);
1186         unregister_chrdev(FB_MAJOR, "fb");
1187 }
1188
1189 module_exit(fbmem_exit);
1190 MODULE_LICENSE("GPL");
1191 MODULE_DESCRIPTION("Framebuffer base");
1192 #else
1193 subsys_initcall(fbmem_init);
1194 #endif
1195
1196 int fb_new_modelist(struct fb_info *info)
1197 {
1198         struct fb_event event;
1199         struct fb_var_screeninfo var = info->var;
1200         struct list_head *pos, *n;
1201         struct fb_modelist *modelist;
1202         struct fb_videomode *m, mode;
1203         int err = 1;
1204
1205         list_for_each_safe(pos, n, &info->modelist) {
1206                 modelist = list_entry(pos, struct fb_modelist, list);
1207                 m = &modelist->mode;
1208                 fb_videomode_to_var(&var, m);
1209                 var.activate = FB_ACTIVATE_TEST;
1210                 err = fb_set_var(info, &var);
1211                 fb_var_to_videomode(&mode, &var);
1212                 if (err || !fb_mode_is_equal(m, &mode)) {
1213                         list_del(pos);
1214                         kfree(pos);
1215                 }
1216         }
1217
1218         err = 1;
1219
1220         if (!list_empty(&info->modelist)) {
1221                 event.info = info;
1222                 err = notifier_call_chain(&fb_notifier_list,
1223                                            FB_EVENT_NEW_MODELIST,
1224                                            &event);
1225         }
1226
1227         return err;
1228 }
1229
1230 static char *video_options[FB_MAX];
1231 static int ofonly;
1232
1233 extern const char *global_mode_option;
1234
1235 /**
1236  * fb_get_options - get kernel boot parameters
1237  * @name:   framebuffer name as it would appear in
1238  *          the boot parameter line
1239  *          (video=<name>:<options>)
1240  * @option: the option will be stored here
1241  *
1242  * NOTE: Needed to maintain backwards compatibility
1243  */
1244 int fb_get_options(char *name, char **option)
1245 {
1246         char *opt, *options = NULL;
1247         int opt_len, retval = 0;
1248         int name_len = strlen(name), i;
1249
1250         if (name_len && ofonly && strncmp(name, "offb", 4))
1251                 retval = 1;
1252
1253         if (name_len && !retval) {
1254                 for (i = 0; i < FB_MAX; i++) {
1255                         if (video_options[i] == NULL)
1256                                 continue;
1257                         opt_len = strlen(video_options[i]);
1258                         if (!opt_len)
1259                                 continue;
1260                         opt = video_options[i];
1261                         if (!strncmp(name, opt, name_len) &&
1262                             opt[name_len] == ':')
1263                                 options = opt + name_len + 1;
1264                 }
1265         }
1266         if (options && !strncmp(options, "off", 3))
1267                 retval = 1;
1268
1269         if (option)
1270                 *option = options;
1271
1272         return retval;
1273 }
1274
1275 /**
1276  *      video_setup - process command line options
1277  *      @options: string of options
1278  *
1279  *      Process command line options for frame buffer subsystem.
1280  *
1281  *      NOTE: This function is a __setup and __init function.
1282  *            It only stores the options.  Drivers have to call
1283  *            fb_get_options() as necessary.
1284  *
1285  *      Returns zero.
1286  *
1287  */
1288 static int __init video_setup(char *options)
1289 {
1290         int i, global = 0;
1291
1292         if (!options || !*options)
1293                 global = 1;
1294
1295         if (!global && !strncmp(options, "ofonly", 6)) {
1296                 ofonly = 1;
1297                 global = 1;
1298         }
1299
1300         if (!global && !strstr(options, "fb:")) {
1301                 global_mode_option = options;
1302                 global = 1;
1303         }
1304
1305         if (!global) {
1306                 for (i = 0; i < FB_MAX; i++) {
1307                         if (video_options[i] == NULL) {
1308                                 video_options[i] = options;
1309                                 break;
1310                         }
1311
1312                 }
1313         }
1314
1315         return 0;
1316 }
1317 __setup("video=", video_setup);
1318
1319     /*
1320      *  Visible symbols for modules
1321      */
1322
1323 EXPORT_SYMBOL(register_framebuffer);
1324 EXPORT_SYMBOL(unregister_framebuffer);
1325 EXPORT_SYMBOL(num_registered_fb);
1326 EXPORT_SYMBOL(registered_fb);
1327 EXPORT_SYMBOL(fb_prepare_logo);
1328 EXPORT_SYMBOL(fb_show_logo);
1329 EXPORT_SYMBOL(fb_set_var);
1330 EXPORT_SYMBOL(fb_blank);
1331 EXPORT_SYMBOL(fb_pan_display);
1332 EXPORT_SYMBOL(fb_get_buffer_offset);
1333 EXPORT_SYMBOL(fb_set_suspend);
1334 EXPORT_SYMBOL(fb_register_client);
1335 EXPORT_SYMBOL(fb_unregister_client);
1336 EXPORT_SYMBOL(fb_get_options);
1337 EXPORT_SYMBOL(fb_new_modelist);
1338
1339 MODULE_LICENSE("GPL");