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
  39 #if defined(__mc68000__) || defined(CONFIG_APUS)
  40 #include <asm/setup.h>
  41 #endif
  42
  43 #include <asm/io.h>
  44 #include <asm/uaccess.h>
  45 #include <asm/page.h>
  46 #include <asm/pgtable.h>
  47
  48 #include <linux/fb.h>
  49
  50 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
  51 #include "console/fbcon.h"
  52 #endif
  53     /*
  54      *  Frame buffer device initialization and setup routines
  55      */
  56
  57 extern int acornfb_init(void);
  58 extern int acornfb_setup(char*);
  59 extern int amifb_init(void);
  60 extern int amifb_setup(char*);
  61 extern int atafb_init(void);
  62 extern int atafb_setup(char*);
  63 extern int macfb_init(void);
  64 extern int macfb_setup(char*);
  65 extern int cyberfb_init(void);
  66 extern int cyberfb_setup(char*);
  67 extern int pm2fb_init(void);
  68 extern int pm2fb_setup(char*);
  69 extern int pm3fb_init(void);
  70 extern int pm3fb_setup(char*);
  71 extern int clps711xfb_init(void);
  72 extern int cyber2000fb_init(void);
  73 extern int cyber2000fb_setup(char*);
  74 extern int retz3fb_init(void);
  75 extern int retz3fb_setup(char*);
  76 extern int cirrusfb_init(void);
  77 extern int cirrusfb_setup(char*);
  78 extern int hitfb_init(void);
  79 extern int vfb_init(void);
  80 extern int vfb_setup(char*);
  81 extern int offb_init(void);
  82 extern int atyfb_init(void);
  83 extern int atyfb_setup(char*);
  84 extern int aty128fb_init(void);
  85 extern int aty128fb_setup(char*);
  86 extern int neofb_init(void);
  87 extern int neofb_setup(char*);
  88 extern int igafb_init(void);
  89 extern int igafb_setup(char*);
  90 extern int imsttfb_init(void);
  91 extern int imsttfb_setup(char*);
  92 extern int dnfb_init(void);
  93 extern int tgafb_init(void);
  94 extern int tgafb_setup(char*);
  95 extern int virgefb_init(void);
  96 extern int virgefb_setup(char*);
  97 extern int resolver_video_setup(char*);
  98 extern int s3triofb_init(void);
  99 extern int vesafb_init(void);
 100 extern int vesafb_setup(char*);
 101 extern int vga16fb_init(void);
 102 extern int vga16fb_setup(char*);
 103 extern int hgafb_init(void);
 104 extern int hgafb_setup(char*);
 105 extern int matroxfb_init(void);
 106 extern int matroxfb_setup(char*);
 107 extern int hpfb_init(void);
 108 extern int platinumfb_init(void);
 109 extern int platinumfb_setup(char*);
 110 extern int control_init(void);
 111 extern int control_setup(char*);
 112 extern int valkyriefb_init(void);
 113 extern int valkyriefb_setup(char*);
 114 extern int chips_init(void);
 115 extern int g364fb_init(void);
 116 extern int sa1100fb_init(void);
 117 extern int pxafb_init(void);
 118 extern int pxafb_setup(char*);
 119 extern int fm2fb_init(void);
 120 extern int fm2fb_setup(char*);
 121 extern int q40fb_init(void);
 122 extern int sun3fb_init(void);
 123 extern int sun3fb_setup(char *);
 124 extern int sgivwfb_init(void);
 125 extern int sgivwfb_setup(char*);
 126 extern int gbefb_init(void);
 127 extern int gbefb_setup(char*);
 128 extern int rivafb_init(void);
 129 extern int rivafb_setup(char*);
 130 extern int tdfxfb_init(void);
 131 extern int tdfxfb_setup(char*);
 132 extern int tridentfb_init(void);
 133 extern int tridentfb_setup(char*);
 134 extern int sisfb_init(void);
 135 extern int sisfb_setup(char*);
 136 extern int stifb_init(void);
 137 extern int stifb_setup(char*);
 138 extern int pmagbafb_init(void);
 139 extern int pmagbbfb_init(void);
 140 extern int maxinefb_init(void);
 141 extern int tx3912fb_init(void);
 142 extern int tx3912fb_setup(char*);
 143 extern int radeonfb_init(void);
 144 extern int radeonfb_setup(char*);
 145 extern int radeonfb_old_init(void);
 146 extern int radeonfb_old_setup(char*);
 147 extern int e1355fb_init(void);
 148 extern int e1355fb_setup(char*);
 149 extern int pvr2fb_init(void);
 150 extern int pvr2fb_setup(char*);
 151 extern int sstfb_init(void);
 152 extern int sstfb_setup(char*);
 153 extern int i810fb_init(void);
 154 extern int i810fb_setup(char*);
 155 extern int ffb_init(void);
 156 extern int ffb_setup(char*);
 157 extern int cg6_init(void);
 158 extern int cg6_setup(char*);
 159 extern int cg3_init(void);
 160 extern int cg3_setup(char*);
 161 extern int bw2_init(void);
 162 extern int bw2_setup(char*);
 163 extern int cg14_init(void);
 164 extern int cg14_setup(char*);
 165 extern int p9100_init(void);
 166 extern int p9100_setup(char*);
 167 extern int tcx_init(void);
 168 extern int tcx_setup(char*);
 169 extern int leo_init(void);
 170 extern int leo_setup(char*);
 171 extern int kyrofb_init(void);
 172 extern int kyrofb_setup(char*);
 173 extern int mc68x328fb_init(void);
 174 extern int mc68x328fb_setup(char *);
 175 extern int asiliantfb_init(void);
 176
 177 static struct {
 178         const char *name;
 179         int (*init)(void);
 180         int (*setup)(char*);
 181 } fb_drivers[] __initdata = {
 182
 183         /*
 184          * Chipset specific drivers that use resource management
 185          */
 186 #ifdef CONFIG_FB_RETINAZ3
 187         { "retz3fb", retz3fb_init, retz3fb_setup },
 188 #endif
 189 #ifdef CONFIG_FB_AMIGA
 190         { "amifb", amifb_init, amifb_setup },
 191 #endif
 192 #ifdef CONFIG_FB_CLPS711X
 193         { "clps711xfb", clps711xfb_init, NULL },
 194 #endif
 195 #ifdef CONFIG_FB_CYBER
 196         { "cyberfb", cyberfb_init, cyberfb_setup },
 197 #endif
 198 #ifdef CONFIG_FB_CYBER2000
 199         { "cyber2000fb", cyber2000fb_init, cyber2000fb_setup },
 200 #endif
 201 #ifdef CONFIG_FB_PM2
 202         { "pm2fb", pm2fb_init, pm2fb_setup },
 203 #endif
 204 #ifdef CONFIG_FB_PM3
 205         { "pm3fb", pm3fb_init, pm3fb_setup },
 206 #endif
 207 #ifdef CONFIG_FB_CIRRUS
 208         { "cirrusfb", cirrusfb_init, cirrusfb_setup },
 209 #endif
 210 #ifdef CONFIG_FB_ATY
 211         { "atyfb", atyfb_init, atyfb_setup },
 212 #endif
 213 #ifdef CONFIG_FB_MATROX
 214         { "matroxfb", matroxfb_init, matroxfb_setup },
 215 #endif
 216 #ifdef CONFIG_FB_ATY128
 217         { "aty128fb", aty128fb_init, aty128fb_setup },
 218 #endif
 219 #ifdef CONFIG_FB_NEOMAGIC
 220         { "neofb", neofb_init, neofb_setup },
 221 #endif
 222 #ifdef CONFIG_FB_VIRGE
 223         { "virgefb", virgefb_init, virgefb_setup },
 224 #endif
 225 #ifdef CONFIG_FB_RIVA
 226         { "rivafb", rivafb_init, rivafb_setup },
 227 #endif
 228 #ifdef CONFIG_FB_3DFX
 229         { "tdfxfb", tdfxfb_init, tdfxfb_setup },
 230 #endif
 231 #ifdef CONFIG_FB_RADEON
 232         { "radeonfb", radeonfb_init, radeonfb_setup },
 233 #endif
 234 #ifdef CONFIG_FB_RADEON_OLD
 235         { "radeonfb_old", radeonfb_old_init, radeonfb_old_setup },
 236 #endif
 237 #ifdef CONFIG_FB_CONTROL
 238         { "controlfb", control_init, control_setup },
 239 #endif
 240 #ifdef CONFIG_FB_PLATINUM
 241         { "platinumfb", platinumfb_init, platinumfb_setup },
 242 #endif
 243 #ifdef CONFIG_FB_VALKYRIE
 244         { "valkyriefb", valkyriefb_init, valkyriefb_setup },
 245 #endif
 246 #ifdef CONFIG_FB_CT65550
 247         { "chipsfb", chips_init, NULL },
 248 #endif
 249 #ifdef CONFIG_FB_IMSTT
 250         { "imsttfb", imsttfb_init, imsttfb_setup },
 251 #endif
 252 #ifdef CONFIG_FB_S3TRIO
 253         { "s3triofb", s3triofb_init, NULL },
 254 #endif
 255 #ifdef CONFIG_FB_FM2
 256         { "fm2fb", fm2fb_init, fm2fb_setup },
 257 #endif
 258 #ifdef CONFIG_FB_SIS
 259         { "sisfb", sisfb_init, sisfb_setup },
 260 #endif
 261 #ifdef CONFIG_FB_TRIDENT
 262         { "tridentfb", tridentfb_init, tridentfb_setup },
 263 #endif
 264 #ifdef CONFIG_FB_I810
 265         { "i810fb", i810fb_init, i810fb_setup },
 266 #endif
 267 #ifdef CONFIG_FB_STI
 268         { "stifb", stifb_init, stifb_setup },
 269 #endif
 270 #ifdef CONFIG_FB_FFB
 271         { "ffb", ffb_init, ffb_setup },
 272 #endif
 273 #ifdef CONFIG_FB_CG6
 274         { "cg6fb", cg6_init, cg6_setup },
 275 #endif
 276 #ifdef CONFIG_FB_CG3
 277         { "cg3fb", cg3_init, cg3_setup },
 278 #endif
 279 #ifdef CONFIG_FB_BW2
 280         { "bw2fb", bw2_init, bw2_setup },
 281 #endif
 282 #ifdef CONFIG_FB_CG14
 283         { "cg14fb", cg14_init, cg14_setup },
 284 #endif
 285 #ifdef CONFIG_FB_P9100
 286         { "p9100fb", p9100_init, p9100_setup },
 287 #endif
 288 #ifdef CONFIG_FB_TCX
 289         { "tcxfb", tcx_init, tcx_setup },
 290 #endif
 291 #ifdef CONFIG_FB_LEO
 292         { "leofb", leo_init, leo_setup },
 293 #endif
 294
 295         /*
 296          * Generic drivers that are used as fallbacks
 297          *
 298          * These depend on resource management and must be initialized
 299          * _after_ all other frame buffer devices that use resource
 300          * management!
 301          */
 302
 303 #ifdef CONFIG_FB_OF
 304         { "offb", offb_init, NULL },
 305 #endif
 306 #ifdef CONFIG_FB_VESA
 307         { "vesafb", vesafb_init, vesafb_setup },
 308 #endif
 309
 310         /*
 311          * Chipset specific drivers that don't use resource management (yet)
 312          */
 313
 314 #ifdef CONFIG_FB_SGIVW
 315         { "sgivwfb", sgivwfb_init, sgivwfb_setup },
 316 #endif
 317 #ifdef CONFIG_FB_GBE
 318         { "gbefb", gbefb_init, gbefb_setup },
 319 #endif
 320 #ifdef CONFIG_FB_ACORN
 321         { "acornfb", acornfb_init, acornfb_setup },
 322 #endif
 323 #ifdef CONFIG_FB_ATARI
 324         { "atafb", atafb_init, atafb_setup },
 325 #endif
 326 #ifdef CONFIG_FB_MAC
 327         { "macfb", macfb_init, macfb_setup },
 328 #endif
 329 #ifdef CONFIG_FB_HGA
 330         { "hgafb", hgafb_init, hgafb_setup },
 331 #endif
 332 #ifdef CONFIG_FB_IGA
 333         { "igafb", igafb_init, igafb_setup },
 334 #endif
 335 #ifdef CONFIG_APOLLO
 336         { "apollofb", dnfb_init, NULL },
 337 #endif
 338 #ifdef CONFIG_FB_Q40
 339         { "q40fb", q40fb_init, NULL },
 340 #endif
 341 #ifdef CONFIG_FB_TGA
 342         { "tgafb", tgafb_init, tgafb_setup },
 343 #endif
 344 #ifdef CONFIG_FB_HP300
 345         { "hpfb", hpfb_init, NULL },
 346 #endif
 347 #ifdef CONFIG_FB_G364
 348         { "g364fb", g364fb_init, NULL },
 349 #endif
 350 #ifdef CONFIG_FB_SA1100
 351         { "sa1100fb", sa1100fb_init, NULL },
 352 #endif
 353 #ifdef CONFIG_FB_PXA
 354         { "pxafb", pxafb_init, pxafb_setup },
 355 #endif
 356 #ifdef CONFIG_FB_SUN3
 357         { "sun3fb", sun3fb_init, sun3fb_setup },
 358 #endif
 359 #ifdef CONFIG_FB_HIT
 360         { "hitfb", hitfb_init, NULL },
 361 #endif
 362 #ifdef CONFIG_FB_TX3912
 363         { "tx3912fb", tx3912fb_init, tx3912fb_setup },
 364 #endif
 365 #ifdef CONFIG_FB_E1355
 366         { "e1355fb", e1355fb_init, e1355fb_setup },
 367 #endif
 368 #ifdef CONFIG_FB_PVR2
 369         { "pvr2fb", pvr2fb_init, pvr2fb_setup },
 370 #endif
 371 #ifdef CONFIG_FB_PMAG_BA
 372         { "pmagbafb", pmagbafb_init, NULL },
 373 #endif
 374 #ifdef CONFIG_FB_PMAGB_B
 375         { "pmagbbfb", pmagbbfb_init, NULL },
 376 #endif
 377 #ifdef CONFIG_FB_MAXINE
 378         { "maxinefb", maxinefb_init, NULL },
 379 #endif
 380 #ifdef CONFIG_FB_VOODOO1
 381         { "sstfb", sstfb_init, sstfb_setup },
 382 #endif
 383 #ifdef CONFIG_FB_KYRO
 384         { "kyrofb", kyrofb_init, kyrofb_setup },
 385 #endif
 386 #ifdef CONFIG_FB_68328
 387         { "68328fb", mc68x328fb_init, mc68x328fb_setup },
 388 #endif
 389 #ifdef CONFIG_FB_ASILIANT
 390         { "asiliantfb", asiliantfb_init, NULL },
 391 #endif
 392
 393         /*
 394          * Generic drivers that don't use resource management (yet)
 395          */
 396
 397 #ifdef CONFIG_FB_VGA16
 398         { "vga16fb", vga16fb_init, vga16fb_setup },
 399 #endif
 400
 401 #ifdef CONFIG_GSP_RESOLVER
 402         /* Not a real frame buffer device... */
 403         { "resolverfb", NULL, resolver_video_setup },
 404 #endif
 405
 406 #ifdef CONFIG_FB_VIRTUAL
 407         /*
 408          * Vfb must be last to avoid that it becomes your primary display if
 409          * other display devices are present
 410          */
 411         { "vfb", vfb_init, vfb_setup },
 412 #endif
 413 };
 414
 415 #define NUM_FB_DRIVERS  (sizeof(fb_drivers)/sizeof(*fb_drivers))
 416 #define FBPIXMAPSIZE    16384
 417
 418 extern const char *global_mode_option;
 419
 420 static initcall_t pref_init_funcs[FB_MAX];
 421 static int num_pref_init_funcs __initdata = 0;
 422 static struct notifier_block *fb_notifier_list;
 423 struct fb_info *registered_fb[FB_MAX];
 424 int num_registered_fb;
 425
 426 #ifdef CONFIG_FB_OF
 427 static int ofonly __initdata = 0;
 428 #endif
 429
 430 /*
 431  * Drawing helpers.
 432  */
 433 void fb_iomove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
 434                            u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
 435                            u32 height)
 436 {
 437         int i;
 438
 439         for (i = height; i--; ) {
 440                 buf->outbuf(info, dst, src, s_pitch);
 441                 src += s_pitch;
 442                 dst += d_pitch;
 443         }
 444 }
 445
 446 void fb_sysmove_buf_aligned(struct fb_info *info, struct fb_pixmap *buf,
 447                             u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch,
 448                             u32 height)
 449 {
 450         int i, j;
 451
 452         for (i = height; i--; ) {
 453                 for (j = 0; j < s_pitch; j++)
 454                         dst[j] = src[j];
 455                 src += s_pitch;
 456                 dst += d_pitch;
 457         }
 458 }
 459
 460 void fb_iomove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
 461                              u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 462                              u32 height, u32 shift_high, u32 shift_low,
 463                              u32 mod)
 464 {
 465         u8 mask = (u8) (0xfff << shift_high), tmp;
 466         int i, j;
 467
 468         for (i = height; i--; ) {
 469                 for (j = 0; j < idx; j++) {
 470                         tmp = buf->inbuf(info, dst+j);
 471                         tmp &= mask;
 472                         tmp |= *src >> shift_low;
 473                         buf->outbuf(info, dst+j, &tmp, 1);
 474                         tmp = *src << shift_high;
 475                         buf->outbuf(info, dst+j+1, &tmp, 1);
 476                         src++;
 477                 }
 478                 tmp = buf->inbuf(info, dst+idx);
 479                 tmp &= mask;
 480                 tmp |= *src >> shift_low;
 481                 buf->outbuf(info, dst+idx, &tmp, 1);
 482                 if (shift_high < mod) {
 483                         tmp = *src << shift_high;
 484                         buf->outbuf(info, dst+idx+1, &tmp, 1);
 485                 }
 486                 src++;
 487                 dst += d_pitch;
 488         }
 489 }
 490
 491 void fb_sysmove_buf_unaligned(struct fb_info *info, struct fb_pixmap *buf,
 492                               u8 *dst, u32 d_pitch, u8 *src, u32 idx,
 493                               u32 height, u32 shift_high, u32 shift_low,
 494                               u32 mod)
 495 {
 496         u8 mask = (u8) (0xfff << shift_high), tmp;
 497         int i, j;
 498
 499         for (i = height; i--; ) {
 500                 for (j = 0; j < idx; j++) {
 501                         tmp = dst[j];
 502                         tmp &= mask;
 503                         tmp |= *src >> shift_low;
 504                         dst[j] = tmp;
 505                         tmp = *src << shift_high;
 506                         dst[j+1] = tmp;
 507                         src++;
 508                 }
 509                 tmp = dst[idx];
 510                 tmp &= mask;
 511                 tmp |= *src >> shift_low;
 512                 dst[idx] = tmp;
 513                 if (shift_high < mod) {
 514                         tmp = *src << shift_high;
 515                         dst[idx+1] = tmp;
 516                 }
 517                 src++;
 518                 dst += d_pitch;
 519         }
 520 }
 521
 522 /*
 523  * we need to lock this section since fb_cursor
 524  * may use fb_imageblit()
 525  */
 526 char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size)
 527 {
 528         u32 align = buf->buf_align - 1, offset;
 529         char *addr = buf->addr;
 530
 531         /* If IO mapped, we need to sync before access, no sharing of
 532          * the pixmap is done
 533          */
 534         if (buf->flags & FB_PIXMAP_IO) {
 535                 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
 536                         info->fbops->fb_sync(info);
 537                 return addr;
 538         }
 539
 540         /* See if we fit in the remaining pixmap space */
 541         offset = buf->offset + align;
 542         offset &= ~align;
 543         if (offset + size > buf->size) {
 544                 /* We do not fit. In order to be able to re-use the buffer,
 545                  * we must ensure no asynchronous DMA'ing or whatever operation
 546                  * is in progress, we sync for that.
 547                  */
 548                 if (info->fbops->fb_sync && (buf->flags & FB_PIXMAP_SYNC))
 549                         info->fbops->fb_sync(info);
 550                 offset = 0;
 551         }
 552         buf->offset = offset + size;
 553         addr += offset;
 554
 555         return addr;
 556 }
 557
 558 #ifdef CONFIG_LOGO
 559 #include <linux/linux_logo.h>
 560
 561 static inline unsigned safe_shift(unsigned d, int n)
 562 {
 563         return n < 0 ? d >> -n : d << n;
 564 }
 565
 566 static void __init fb_set_logocmap(struct fb_info *info,
 567                                    const struct linux_logo *logo)
 568 {
 569         struct fb_cmap palette_cmap;
 570         u16 palette_green[16];
 571         u16 palette_blue[16];
 572         u16 palette_red[16];
 573         int i, j, n;
 574         const unsigned char *clut = logo->clut;
 575
 576         palette_cmap.start = 0;
 577         palette_cmap.len = 16;
 578         palette_cmap.red = palette_red;
 579         palette_cmap.green = palette_green;
 580         palette_cmap.blue = palette_blue;
 581         palette_cmap.transp = NULL;
 582
 583         for (i = 0; i < logo->clutsize; i += n) {
 584                 n = logo->clutsize - i;
 585                 /* palette_cmap provides space for only 16 colors at once */
 586                 if (n > 16)
 587                         n = 16;
 588                 palette_cmap.start = 32 + i;
 589                 palette_cmap.len = n;
 590                 for (j = 0; j < n; ++j) {
 591                         palette_cmap.red[j] = clut[0] << 8 | clut[0];
 592                         palette_cmap.green[j] = clut[1] << 8 | clut[1];
 593                         palette_cmap.blue[j] = clut[2] << 8 | clut[2];
 594                         clut += 3;
 595                 }
 596                 fb_set_cmap(&palette_cmap, 1, info);
 597         }
 598 }
 599
 600 static void  __init fb_set_logo_truepalette(struct fb_info *info,
 601                                             const struct linux_logo *logo,
 602                                             u32 *palette)
 603 {
 604         unsigned char mask[9] = { 0,0x80,0xc0,0xe0,0xf0,0xf8,0xfc,0xfe,0xff };
 605         unsigned char redmask, greenmask, bluemask;
 606         int redshift, greenshift, blueshift;
 607         int i;
 608         const unsigned char *clut = logo->clut;
 609
 610         /*
 611          * We have to create a temporary palette since console palette is only
 612          * 16 colors long.
 613          */
 614         /* Bug: Doesn't obey msb_right ... (who needs that?) */
 615         redmask   = mask[info->var.red.length   < 8 ? info->var.red.length   : 8];
 616         greenmask = mask[info->var.green.length < 8 ? info->var.green.length : 8];
 617         bluemask  = mask[info->var.blue.length  < 8 ? info->var.blue.length  : 8];
 618         redshift   = info->var.red.offset   - (8 - info->var.red.length);
 619         greenshift = info->var.green.offset - (8 - info->var.green.length);
 620         blueshift  = info->var.blue.offset  - (8 - info->var.blue.length);
 621
 622         for ( i = 0; i < logo->clutsize; i++) {
 623                 palette[i+32] = (safe_shift((clut[0] & redmask), redshift) |
 624                                  safe_shift((clut[1] & greenmask), greenshift) |
 625                                  safe_shift((clut[2] & bluemask), blueshift));
 626                 clut += 3;
 627         }
 628 }
 629
 630 static void __init fb_set_logo_directpalette(struct fb_info *info,
 631                                              const struct linux_logo *logo,
 632                                              u32 *palette)
 633 {
 634         int redshift, greenshift, blueshift;
 635         int i;
 636
 637         redshift = info->var.red.offset;
 638         greenshift = info->var.green.offset;
 639         blueshift = info->var.blue.offset;
 640
 641         for (i = 32; i < logo->clutsize; i++)
 642                 palette[i] = i << redshift | i << greenshift | i << blueshift;
 643 }
 644
 645 static void __init fb_set_logo(struct fb_info *info,
 646                                const struct linux_logo *logo, u8 *dst,
 647                                int depth)
 648 {
 649         int i, j, shift;
 650         const u8 *src = logo->data;
 651         u8 d, xor = 0;
 652
 653         switch (depth) {
 654         case 4:
 655                 for (i = 0; i < logo->height; i++)
 656                         for (j = 0; j < logo->width; src++) {
 657                                 *dst++ = *src >> 4;
 658                                 j++;
 659                                 if (j < logo->width) {
 660                                         *dst++ = *src & 0x0f;
 661                                         j++;
 662                                 }
 663                         }
 664                 break;
 665         case ~1:
 666                 xor = 0xff;
 667         case 1:
 668                 for (i = 0; i < logo->height; i++) {
 669                         shift = 7;
 670                         d = *src++ ^ xor;
 671                         for (j = 0; j < logo->width; j++) {
 672                                 *dst++ = (d >> shift) & 1;
 673                                 shift = (shift-1) & 7;
 674                                 if (shift == 7)
 675                                         d = *src++ ^ xor;
 676                         }
 677                 }
 678                 break;
 679         }
 680 }
 681
 682 /*
 683  * Three (3) kinds of logo maps exist.  linux_logo_clut224 (>16 colors),
 684  * linux_logo_vga16 (16 colors) and linux_logo_mono (2 colors).  Depending on
 685  * the visual format and color depth of the framebuffer, the DAC, the
 686  * pseudo_palette, and the logo data will be adjusted accordingly.
 687  *
 688  * Case 1 - linux_logo_clut224:
 689  * Color exceeds the number of console colors (16), thus we set the hardware DAC
 690  * using fb_set_cmap() appropriately.  The "needs_cmapreset"  flag will be set.
 691  *
 692  * For visuals that require color info from the pseudo_palette, we also construct
 693  * one for temporary use. The "needs_directpalette" or "needs_truepalette" flags
 694  * will be set.
 695  *
 696  * Case 2 - linux_logo_vga16:
 697  * The number of colors just matches the console colors, thus there is no need
 698  * to set the DAC or the pseudo_palette.  However, the bitmap is packed, ie,
 699  * each byte contains color information for two pixels (upper and lower nibble).
 700  * To be consistent with fb_imageblit() usage, we therefore separate the two
 701  * nibbles into separate bytes. The "depth" flag will be set to 4.
 702  *
 703  * Case 3 - linux_logo_mono:
 704  * This is similar with Case 2.  Each byte contains information for 8 pixels.
 705  * We isolate each bit and expand each into a byte. The "depth" flag will
 706  * be set to 1.
 707  */
 708 static struct logo_data {
 709         int depth;
 710         int needs_directpalette;
 711         int needs_truepalette;
 712         int needs_cmapreset;
 713         const struct linux_logo *logo;
 714 } fb_logo;
 715
 716 int fb_prepare_logo(struct fb_info *info)
 717 {
 718         memset(&fb_logo, 0, sizeof(struct logo_data));
 719
 720         switch (info->fix.visual) {
 721         case FB_VISUAL_TRUECOLOR:
 722                 if (info->var.bits_per_pixel >= 8)
 723                         fb_logo.needs_truepalette = 1;
 724                 break;
 725         case FB_VISUAL_DIRECTCOLOR:
 726                 if (info->var.bits_per_pixel >= 24) {
 727                         fb_logo.needs_directpalette = 1;
 728                         fb_logo.needs_cmapreset = 1;
 729                 }
 730                 break;
 731         case FB_VISUAL_PSEUDOCOLOR:
 732                 fb_logo.needs_cmapreset = 1;
 733                 break;
 734         }
 735
 736         /* Return if no suitable logo was found */
 737         fb_logo.logo = fb_find_logo(info->var.bits_per_pixel);
 738
 739         if (!fb_logo.logo || fb_logo.logo->height > info->var.yres) {
 740                 fb_logo.logo = NULL;
 741                 return 0;
 742         }
 743         /* What depth we asked for might be different from what we get */
 744         if (fb_logo.logo->type == LINUX_LOGO_CLUT224)
 745                 fb_logo.depth = 8;
 746         else if (fb_logo.logo->type == LINUX_LOGO_VGA16)
 747                 fb_logo.depth = 4;
 748         else
 749                 fb_logo.depth = 1;
 750         return fb_logo.logo->height;
 751 }
 752
 753 int fb_show_logo(struct fb_info *info)
 754 {
 755         u32 *palette = NULL, *saved_pseudo_palette = NULL;
 756         unsigned char *logo_new = NULL;
 757         struct fb_image image;
 758         int x;
 759
 760         /* Return if the frame buffer is not mapped or suspended */
 761         if (fb_logo.logo == NULL || info->state != FBINFO_STATE_RUNNING)
 762                 return 0;
 763
 764         image.depth = fb_logo.depth;
 765         image.data = fb_logo.logo->data;
 766
 767         if (fb_logo.needs_cmapreset)
 768                 fb_set_logocmap(info, fb_logo.logo);
 769
 770         if (fb_logo.needs_truepalette ||
 771             fb_logo.needs_directpalette) {
 772                 palette = kmalloc(256 * 4, GFP_KERNEL);
 773                 if (palette == NULL)
 774                         return 0;
 775
 776                 if (fb_logo.needs_truepalette)
 777                         fb_set_logo_truepalette(info, fb_logo.logo, palette);
 778                 else
 779                         fb_set_logo_directpalette(info, fb_logo.logo, palette);
 780
 781                 saved_pseudo_palette = info->pseudo_palette;
 782                 info->pseudo_palette = palette;
 783         }
 784
 785         if (fb_logo.depth == 4) {
 786                 logo_new = kmalloc(fb_logo.logo->width * fb_logo.logo->height,
 787                                    GFP_KERNEL);
 788                 if (logo_new == NULL) {
 789                         if (palette)
 790                                 kfree(palette);
 791                         if (saved_pseudo_palette)
 792                                 info->pseudo_palette = saved_pseudo_palette;
 793                         return 0;
 794                 }
 795                 image.data = logo_new;
 796                 fb_set_logo(info, fb_logo.logo, logo_new, fb_logo.depth);
 797         }
 798
 799         image.width = fb_logo.logo->width;
 800         image.height = fb_logo.logo->height;
 801         image.dy = 0;
 802
 803         for (x = 0; x < num_online_cpus() * (fb_logo.logo->width + 8) &&
 804              x <= info->var.xres-fb_logo.logo->width; x += (fb_logo.logo->width + 8)) {
 805                 image.dx = x;
 806                 info->fbops->fb_imageblit(info, &image);
 807         }
 808
 809         if (palette != NULL)
 810                 kfree(palette);
 811         if (saved_pseudo_palette != NULL)
 812                 info->pseudo_palette = saved_pseudo_palette;
 813         if (logo_new != NULL)
 814                 kfree(logo_new);
 815         return fb_logo.logo->height;
 816 }
 817 #else
 818 int fb_prepare_logo(struct fb_info *info) { return 0; }
 819 int fb_show_logo(struct fb_info *info) { return 0; }
 820 #endif /* CONFIG_LOGO */
 821
 822 static int fbmem_read_proc(char *buf, char **start, off_t offset,
 823                            int len, int *eof, void *private)
 824 {
 825         struct fb_info **fi;
 826         int clen;
 827
 828         clen = 0;
 829         for (fi = registered_fb; fi < &registered_fb[FB_MAX] && len < 4000; fi++)
 830                 if (*fi)
 831                         clen += sprintf(buf + clen, "%d %s\n",
 832                                         (*fi)->node,
 833                                         (*fi)->fix.id);
 834         *start = buf + offset;
 835         if (clen > offset)
 836                 clen -= offset;
 837         else
 838                 clen = 0;
 839         return clen < len ? clen : len;
 840 }
 841
 842 static ssize_t
 843 fb_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 844 {
 845         unsigned long p = *ppos;
 846         struct inode *inode = file->f_dentry->d_inode;
 847         int fbidx = iminor(inode);
 848         struct fb_info *info = registered_fb[fbidx];
 849
 850         if (!info || ! info->screen_base)
 851                 return -ENODEV;
 852
 853         if (info->state != FBINFO_STATE_RUNNING)
 854                 return -EPERM;
 855
 856         if (info->fbops->fb_read)
 857                 return info->fbops->fb_read(file, buf, count, ppos);
 858
 859         if (p >= info->fix.smem_len)
 860             return 0;
 861         if (count >= info->fix.smem_len)
 862             count = info->fix.smem_len;
 863         if (count + p > info->fix.smem_len)
 864                 count = info->fix.smem_len - p;
 865         if (info->fbops->fb_sync)
 866                 info->fbops->fb_sync(info);
 867         if (count) {
 868             char *base_addr;
 869
 870             base_addr = info->screen_base;
 871             count -= copy_to_user(buf, base_addr+p, count);
 872             if (!count)
 873                 return -EFAULT;
 874             *ppos += count;
 875         }
 876         return count;
 877 }
 878
 879 static ssize_t
 880 fb_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 881 {
 882         unsigned long p = *ppos;
 883         struct inode *inode = file->f_dentry->d_inode;
 884         int fbidx = iminor(inode);
 885         struct fb_info *info = registered_fb[fbidx];
 886         int err;
 887
 888         if (!info || !info->screen_base)
 889                 return -ENODEV;
 890
 891         if (info->state != FBINFO_STATE_RUNNING)
 892                 return -EPERM;
 893
 894         if (info->fbops->fb_write)
 895                 return info->fbops->fb_write(file, buf, count, ppos);
 896
 897         if (p > info->fix.smem_len)
 898             return -ENOSPC;
 899         if (count >= info->fix.smem_len)
 900             count = info->fix.smem_len;
 901         err = 0;
 902         if (count + p > info->fix.smem_len) {
 903             count = info->fix.smem_len - p;
 904             err = -ENOSPC;
 905         }
 906         if (info->fbops->fb_sync)
 907                 info->fbops->fb_sync(info);
 908         if (count) {
 909             char *base_addr;
 910
 911             base_addr = info->screen_base;
 912             count -= copy_from_user(base_addr+p, buf, count);
 913             *ppos += count;
 914             err = -EFAULT;
 915         }
 916         if (count)
 917                 return count;
 918         return err;
 919 }
 920
 921 #ifdef CONFIG_KMOD
 922 static void try_to_load(int fb)
 923 {
 924         request_module("fb%d", fb);
 925 }
 926 #endif /* CONFIG_KMOD */
 927
 928 void
 929 fb_load_cursor_image(struct fb_info *info)
 930 {
 931         unsigned int width = (info->cursor.image.width + 7) >> 3;
 932         u8 *data = (u8 *) info->cursor.image.data;
 933
 934         if (info->sprite.outbuf)
 935             info->sprite.outbuf(info, info->sprite.addr, data, width);
 936         else
 937             memcpy(info->sprite.addr, data, width);
 938 }
 939
 940 int
 941 fb_cursor(struct fb_info *info, struct fb_cursor *sprite)
 942 {
 943         struct fb_cursor cursor;
 944         int err;
 945
 946         if (copy_from_user(&cursor, sprite, sizeof(struct fb_cursor)))
 947                 return -EFAULT;
 948
 949         if (cursor.set & FB_CUR_SETCUR)
 950                 info->cursor.enable = 1;
 951
 952         if (cursor.set & FB_CUR_SETCMAP) {
 953                 err = fb_copy_cmap(&cursor.image.cmap, &sprite->image.cmap, 1);
 954                 if (err)
 955                         return err;
 956         }
 957
 958         if (cursor.set & FB_CUR_SETSHAPE) {
 959                 int size = ((cursor.image.width + 7) >> 3) * cursor.image.height;
 960                 char *data, *mask;
 961
 962                 if ((cursor.image.height != info->cursor.image.height) ||
 963                     (cursor.image.width != info->cursor.image.width))
 964                         cursor.set |= FB_CUR_SETSIZE;
 965
 966                 data = kmalloc(size, GFP_KERNEL);
 967                 if (!data)
 968                         return -ENOMEM;
 969
 970                 mask = kmalloc(size, GFP_KERNEL);
 971                 if (!mask) {
 972                         kfree(data);
 973                         return -ENOMEM;
 974                 }
 975
 976                 if (copy_from_user(data, sprite->image.data, size) ||
 977                     copy_from_user(mask, sprite->mask, size)) {
 978                         kfree(data);
 979                         kfree(mask);
 980                         return -EFAULT;
 981                 }
 982                 cursor.image.data = data;
 983                 cursor.mask = mask;
 984         }
 985         info->cursor.set = cursor.set;
 986         info->cursor.rop = cursor.rop;
 987         err = info->fbops->fb_cursor(info, &cursor);
 988         return err;
 989 }
 990
 991 int
 992 fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var)
 993 {
 994         int xoffset = var->xoffset;
 995         int yoffset = var->yoffset;
 996         int err;
 997
 998         if (xoffset < 0 || yoffset < 0 || !info->fbops->fb_pan_display ||
 999             xoffset + info->var.xres > info->var.xres_virtual ||
1000             yoffset + info->var.yres > info->var.yres_virtual)
1001                 return -EINVAL;
1002         if ((err = info->fbops->fb_pan_display(var, info)))
1003                 return err;
1004         info->var.xoffset = var->xoffset;
1005         info->var.yoffset = var->yoffset;
1006         if (var->vmode & FB_VMODE_YWRAP)
1007                 info->var.vmode |= FB_VMODE_YWRAP;
1008         else
1009                 info->var.vmode &= ~FB_VMODE_YWRAP;
1010         return 0;
1011 }
1012
1013 int
1014 fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var)
1015 {
1016         int err;
1017
1018         if ((var->activate & FB_ACTIVATE_FORCE) ||
1019             memcmp(&info->var, var, sizeof(struct fb_var_screeninfo))) {
1020                 if (!info->fbops->fb_check_var) {
1021                         *var = info->var;
1022                         return 0;
1023                 }
1024
1025                 if ((err = info->fbops->fb_check_var(var, info)))
1026                         return err;
1027
1028                 if ((var->activate & FB_ACTIVATE_MASK) == FB_ACTIVATE_NOW) {
1029                         info->var = *var;
1030
1031                         if (info->fbops->fb_set_par)
1032                                 info->fbops->fb_set_par(info);
1033
1034                         fb_pan_display(info, &info->var);
1035
1036                         fb_set_cmap(&info->cmap, 1, info);
1037
1038                         if (info->flags & FBINFO_MISC_MODECHANGEUSER) {
1039                                 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
1040                                 notifier_call_chain(&fb_notifier_list,
1041                                                     FB_EVENT_MODE_CHANGE, info);
1042                         }
1043                 }
1044         }
1045         return 0;
1046 }
1047
1048 int
1049 fb_blank(struct fb_info *info, int blank)
1050 {
1051         /* ??? Variable sized stack allocation.  */
1052         u16 black[info->cmap.len];
1053         struct fb_cmap cmap;
1054
1055         if (info->fbops->fb_blank && !info->fbops->fb_blank(blank, info))
1056                 return 0;
1057         if (blank) {
1058                 memset(black, 0, info->cmap.len * sizeof(u16));
1059                 cmap.red = cmap.green = cmap.blue = black;
1060                 cmap.transp = info->cmap.transp ? black : NULL;
1061                 cmap.start = info->cmap.start;
1062                 cmap.len = info->cmap.len;
1063         } else
1064                 cmap = info->cmap;
1065         return fb_set_cmap(&cmap, 1, info);
1066 }
1067
1068 static int
1069 fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1070          unsigned long arg)
1071 {
1072         int fbidx = iminor(inode);
1073         struct fb_info *info = registered_fb[fbidx];
1074         struct fb_ops *fb = info->fbops;
1075         struct fb_var_screeninfo var;
1076         struct fb_fix_screeninfo fix;
1077 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1078         struct fb_con2fbmap con2fb;
1079 #endif
1080         struct fb_cmap cmap;
1081         int i;
1082
1083         if (!fb)
1084                 return -ENODEV;
1085         switch (cmd) {
1086         case FBIOGET_VSCREENINFO:
1087                 return copy_to_user((void *) arg, &info->var,
1088                                     sizeof(var)) ? -EFAULT : 0;
1089         case FBIOPUT_VSCREENINFO:
1090                 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1091                         return -EFAULT;
1092                 acquire_console_sem();
1093                 info->flags |= FBINFO_MISC_MODECHANGEUSER;
1094                 i = fb_set_var(info, &var);
1095                 info->flags &= ~FBINFO_MISC_MODECHANGEUSER;
1096                 release_console_sem();
1097                 if (i) return i;
1098                 if (copy_to_user((void *) arg, &var, sizeof(var)))
1099                         return -EFAULT;
1100                 return 0;
1101         case FBIOGET_FSCREENINFO:
1102                 return copy_to_user((void *) arg, &info->fix,
1103                                     sizeof(fix)) ? -EFAULT : 0;
1104         case FBIOPUTCMAP:
1105                 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1106                         return -EFAULT;
1107                 return (fb_set_cmap(&cmap, 0, info));
1108         case FBIOGETCMAP:
1109                 if (copy_from_user(&cmap, (void *) arg, sizeof(cmap)))
1110                         return -EFAULT;
1111                 return (fb_copy_cmap(&info->cmap, &cmap, 2));
1112         case FBIOPAN_DISPLAY:
1113                 if (copy_from_user(&var, (void *) arg, sizeof(var)))
1114                         return -EFAULT;
1115                 acquire_console_sem();
1116                 i = fb_pan_display(info, &var);
1117                 release_console_sem();
1118                 if (i)
1119                         return i;
1120                 if (copy_to_user((void *) arg, &var, sizeof(var)))
1121                         return -EFAULT;
1122                 return 0;
1123         case FBIO_CURSOR:
1124                 acquire_console_sem();
1125                 i = fb_cursor(info, (struct fb_cursor *) arg);
1126                 release_console_sem();
1127                 return i;
1128 #ifdef CONFIG_FRAMEBUFFER_CONSOLE
1129         case FBIOGET_CON2FBMAP:
1130                 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1131                         return -EFAULT;
1132                 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
1133                     return -EINVAL;
1134                 con2fb.framebuffer = con2fb_map[con2fb.console-1];
1135                 return copy_to_user((void *)arg, &con2fb,
1136                                     sizeof(con2fb)) ? -EFAULT : 0;
1137         case FBIOPUT_CON2FBMAP:
1138                 if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb)))
1139                         return - EFAULT;
1140                 if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES)
1141                     return -EINVAL;
1142                 if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX)
1143                     return -EINVAL;
1144 #ifdef CONFIG_KMOD
1145                 if (!registered_fb[con2fb.framebuffer])
1146                     try_to_load(con2fb.framebuffer);
1147 #endif /* CONFIG_KMOD */
1148                 if (!registered_fb[con2fb.framebuffer])
1149                     return -EINVAL;
1150                 if (con2fb.console > 0 && con2fb.console < MAX_NR_CONSOLES)
1151                         return set_con2fb_map(con2fb.console-1,
1152                                               con2fb.framebuffer);
1153                 return -EINVAL;
1154 #endif  /* CONFIG_FRAMEBUFFER_CONSOLE */
1155         case FBIOBLANK:
1156                 acquire_console_sem();
1157                 i = fb_blank(info, arg);
1158                 release_console_sem();
1159                 return i;
1160         default:
1161                 if (fb->fb_ioctl == NULL)
1162                         return -EINVAL;
1163                 return fb->fb_ioctl(inode, file, cmd, arg, info);
1164         }
1165 }
1166
1167 static int
1168 fb_mmap(struct file *file, struct vm_area_struct * vma)
1169 {
1170         int fbidx = iminor(file->f_dentry->d_inode);
1171         struct fb_info *info = registered_fb[fbidx];
1172         struct fb_ops *fb = info->fbops;
1173         unsigned long off;
1174 #if !defined(__sparc__) || defined(__sparc_v9__)
1175         unsigned long start;
1176         u32 len;
1177 #endif
1178
1179         if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT))
1180                 return -EINVAL;
1181         off = vma->vm_pgoff << PAGE_SHIFT;
1182         if (!fb)
1183                 return -ENODEV;
1184         if (fb->fb_mmap) {
1185                 int res;
1186                 lock_kernel();
1187                 res = fb->fb_mmap(info, file, vma);
1188                 unlock_kernel();
1189                 return res;
1190         }
1191
1192 #if defined(__sparc__) && !defined(__sparc_v9__)
1193         /* Should never get here, all fb drivers should have their own
1194            mmap routines */
1195         return -EINVAL;
1196 #else
1197         /* !sparc32... */
1198         lock_kernel();
1199
1200         /* frame buffer memory */
1201         start = info->fix.smem_start;
1202         len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.smem_len);
1203         if (off >= len) {
1204                 /* memory mapped io */
1205                 off -= len;
1206                 if (info->var.accel_flags) {
1207                         unlock_kernel();
1208                         return -EINVAL;
1209                 }
1210                 start = info->fix.mmio_start;
1211                 len = PAGE_ALIGN((start & ~PAGE_MASK) + info->fix.mmio_len);
1212         }
1213         unlock_kernel();
1214         start &= PAGE_MASK;
1215         if ((vma->vm_end - vma->vm_start + off) > len)
1216                 return -EINVAL;
1217         off += start;
1218         vma->vm_pgoff = off >> PAGE_SHIFT;
1219         /* This is an IO map - tell maydump to skip this VMA */
1220         vma->vm_flags |= VM_IO;
1221 #if defined(__sparc_v9__)
1222         vma->vm_flags |= (VM_SHM | VM_LOCKED);
1223         if (io_remap_page_range(vma, vma->vm_start, off,
1224                                 vma->vm_end - vma->vm_start, vma->vm_page_prot, 0))
1225                 return -EAGAIN;
1226 #else
1227 #if defined(__mc68000__)
1228 #if defined(CONFIG_SUN3)
1229         pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE;
1230 #elif defined(CONFIG_MMU)
1231         if (CPU_IS_020_OR_030)
1232                 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030;
1233         if (CPU_IS_040_OR_060) {
1234                 pgprot_val(vma->vm_page_prot) &= _CACHEMASK040;
1235                 /* Use no-cache mode, serialized */
1236                 pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S;
1237         }
1238 #endif
1239 #elif defined(__powerpc__)
1240         pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED;
1241 #elif defined(__alpha__)
1242         /* Caching is off in the I/O space quadrant by design.  */
1243 #elif defined(__i386__) || defined(__x86_64__)
1244         if (boot_cpu_data.x86 > 3)
1245                 pgprot_val(vma->vm_page_prot) |= _PAGE_PCD;
1246 #elif defined(__mips__)
1247         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1248 #elif defined(__hppa__)
1249         pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE;
1250 #elif defined(__ia64__) || defined(__arm__) || defined(__sh__)
1251         vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1252 #else
1253 #warning What do we have to do here??
1254 #endif
1255         if (io_remap_page_range(vma, vma->vm_start, off,
1256                              vma->vm_end - vma->vm_start, vma->vm_page_prot))
1257                 return -EAGAIN;
1258 #endif /* !__sparc_v9__ */
1259         return 0;
1260 #endif /* !sparc32 */
1261 }
1262
1263 static int
1264 fb_open(struct inode *inode, struct file *file)
1265 {
1266         int fbidx = iminor(inode);
1267         struct fb_info *info;
1268         int res = 0;
1269
1270         if (fbidx >= FB_MAX)
1271                 return -ENODEV;
1272 #ifdef CONFIG_KMOD
1273         if (!(info = registered_fb[fbidx]))
1274                 try_to_load(fbidx);
1275 #endif /* CONFIG_KMOD */
1276         if (!(info = registered_fb[fbidx]))
1277                 return -ENODEV;
1278         if (!try_module_get(info->fbops->owner))
1279                 return -ENODEV;
1280         if (info->fbops->fb_open) {
1281                 res = info->fbops->fb_open(info,1);
1282                 if (res)
1283                         module_put(info->fbops->owner);
1284         }
1285         return res;
1286 }
1287
1288 static int
1289 fb_release(struct inode *inode, struct file *file)
1290 {
1291         int fbidx = iminor(inode);
1292         struct fb_info *info;
1293
1294         lock_kernel();
1295         info = registered_fb[fbidx];
1296         if (info->fbops->fb_release)
1297                 info->fbops->fb_release(info,1);
1298         module_put(info->fbops->owner);
1299         unlock_kernel();
1300         return 0;
1301 }
1302
1303 static struct file_operations fb_fops = {
1304         .owner =        THIS_MODULE,
1305         .read =         fb_read,
1306         .write =        fb_write,
1307         .ioctl =        fb_ioctl,
1308         .mmap =         fb_mmap,
1309         .open =         fb_open,
1310         .release =      fb_release,
1311 #ifdef HAVE_ARCH_FB_UNMAPPED_AREA
1312         .get_unmapped_area = get_fb_unmapped_area,
1313 #endif
1314 };
1315
1316 static struct class_simple *fb_class;
1317
1318 /**
1319  *      register_framebuffer - registers a frame buffer device
1320  *      @fb_info: frame buffer info structure
1321  *
1322  *      Registers a frame buffer device @fb_info.
1323  *
1324  *      Returns negative errno on error, or zero for success.
1325  *
1326  */
1327
1328 int
1329 register_framebuffer(struct fb_info *fb_info)
1330 {
1331         int i;
1332         struct class_device *c;
1333
1334         if (num_registered_fb == FB_MAX)
1335                 return -ENXIO;
1336         num_registered_fb++;
1337         for (i = 0 ; i < FB_MAX; i++)
1338                 if (!registered_fb[i])
1339                         break;
1340         fb_info->node = i;
1341
1342         c = class_simple_device_add(fb_class, MKDEV(FB_MAJOR, i), NULL, "fb%d", i);
1343         if (IS_ERR(c)) {
1344                 /* Not fatal */
1345                 printk(KERN_WARNING "Unable to create class_device for framebuffer %d; errno = %ld\n", i, PTR_ERR(c));
1346         }
1347
1348         if (fb_info->pixmap.addr == NULL) {
1349                 fb_info->pixmap.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1350                 if (fb_info->pixmap.addr) {
1351                         fb_info->pixmap.size = FBPIXMAPSIZE;
1352                         fb_info->pixmap.buf_align = 1;
1353                         fb_info->pixmap.scan_align = 1;
1354                         fb_info->pixmap.access_align = 4;
1355                         fb_info->pixmap.flags = FB_PIXMAP_DEFAULT;
1356                 }
1357         }
1358         fb_info->pixmap.offset = 0;
1359
1360         if (fb_info->sprite.addr == NULL) {
1361                 fb_info->sprite.addr = kmalloc(FBPIXMAPSIZE, GFP_KERNEL);
1362                 if (fb_info->sprite.addr) {
1363                         fb_info->sprite.size = FBPIXMAPSIZE;
1364                         fb_info->sprite.buf_align = 1;
1365                         fb_info->sprite.scan_align = 1;
1366                         fb_info->sprite.access_align = 4;
1367                         fb_info->sprite.flags = FB_PIXMAP_DEFAULT;
1368                 }
1369         }
1370         fb_info->sprite.offset = 0;
1371
1372         registered_fb[i] = fb_info;
1373
1374         devfs_mk_cdev(MKDEV(FB_MAJOR, i),
1375                         S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
1376         return 0;
1377 }
1378
1379
1380 /**
1381  *      unregister_framebuffer - releases a frame buffer device
1382  *      @fb_info: frame buffer info structure
1383  *
1384  *      Unregisters a frame buffer device @fb_info.
1385  *
1386  *      Returns negative errno on error, or zero for success.
1387  *
1388  */
1389
1390 int
1391 unregister_framebuffer(struct fb_info *fb_info)
1392 {
1393         int i;
1394
1395         i = fb_info->node;
1396         if (!registered_fb[i])
1397                 return -EINVAL;
1398         devfs_remove("fb/%d", i);
1399
1400         if (fb_info->pixmap.addr && (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
1401                 kfree(fb_info->pixmap.addr);
1402         if (fb_info->sprite.addr && (fb_info->sprite.flags & FB_PIXMAP_DEFAULT))
1403                 kfree(fb_info->sprite.addr);
1404         registered_fb[i]=NULL;
1405         num_registered_fb--;
1406         class_simple_device_remove(MKDEV(FB_MAJOR, i));
1407         return 0;
1408 }
1409
1410 /**
1411  *      fb_register_client - register a client notifier
1412  *      @nb: notifier block to callback on events
1413  */
1414 int fb_register_client(struct notifier_block *nb)
1415 {
1416         return notifier_chain_register(&fb_notifier_list, nb);
1417 }
1418
1419 /**
1420  *      fb_unregister_client - unregister a client notifier
1421  *      @nb: notifier block to callback on events
1422  */
1423 int fb_unregister_client(struct notifier_block *nb)
1424 {
1425         return notifier_chain_unregister(&fb_notifier_list, nb);
1426 }
1427
1428 /**
1429  *      fb_set_suspend - low level driver signals suspend
1430  *      @info: framebuffer affected
1431  *      @state: 0 = resuming, !=0 = suspending
1432  *
1433  *      This is meant to be used by low level drivers to
1434  *      signal suspend/resume to the core & clients.
1435  *      It must be called with the console semaphore held
1436  */
1437 void fb_set_suspend(struct fb_info *info, int state)
1438 {
1439         if (state) {
1440                 notifier_call_chain(&fb_notifier_list, FB_EVENT_SUSPEND, info);
1441                 info->state = FBINFO_STATE_SUSPENDED;
1442         } else {
1443                 info->state = FBINFO_STATE_RUNNING;
1444                 notifier_call_chain(&fb_notifier_list, FB_EVENT_RESUME, info);
1445         }
1446 }
1447
1448 /**
1449  *      fbmem_init - init frame buffer subsystem
1450  *
1451  *      Initialize the frame buffer subsystem.
1452  *
1453  *      NOTE: This function is _only_ to be called by drivers/char/mem.c.
1454  *
1455  */
1456
1457 void __init
1458 fbmem_init(void)
1459 {
1460         int i;
1461
1462         create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
1463
1464         devfs_mk_dir("fb");
1465         if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
1466                 printk("unable to get major %d for fb devs\n", FB_MAJOR);
1467
1468         fb_class = class_simple_create(THIS_MODULE, "graphics");
1469         if (IS_ERR(fb_class)) {
1470                 printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
1471                 fb_class = NULL;
1472         }
1473
1474 #ifdef CONFIG_FB_OF
1475         if (ofonly) {
1476                 offb_init();
1477                 return;
1478         }
1479 #endif
1480
1481         /*
1482          *  Probe for all builtin frame buffer devices
1483          */
1484         for (i = 0; i < num_pref_init_funcs; i++)
1485                 pref_init_funcs[i]();
1486
1487         for (i = 0; i < NUM_FB_DRIVERS; i++)
1488                 if (fb_drivers[i].init)
1489                         fb_drivers[i].init();
1490 }
1491
1492
1493 /**
1494  *      video_setup - process command line options
1495  *      @options: string of options
1496  *
1497  *      Process command line options for frame buffer subsystem.
1498  *
1499  *      NOTE: This function is a __setup and __init function.
1500  *
1501  *      Returns zero.
1502  *
1503  */
1504
1505 int __init video_setup(char *options)
1506 {
1507         int i, j;
1508
1509         if (!options || !*options)
1510                 return 0;
1511
1512 #ifdef CONFIG_FB_OF
1513         if (!strcmp(options, "ofonly")) {
1514                 ofonly = 1;
1515                 return 0;
1516         }
1517 #endif
1518
1519         if (num_pref_init_funcs == FB_MAX)
1520                 return 0;
1521
1522         for (i = 0; i < NUM_FB_DRIVERS; i++) {
1523                 j = strlen(fb_drivers[i].name);
1524                 if (!strncmp(options, fb_drivers[i].name, j) &&
1525                         options[j] == ':') {
1526                         if (!strcmp(options+j+1, "off"))
1527                                 fb_drivers[i].init = NULL;
1528                         else {
1529                                 if (fb_drivers[i].init) {
1530                                         pref_init_funcs[num_pref_init_funcs++] =
1531                                                 fb_drivers[i].init;
1532                                         fb_drivers[i].init = NULL;
1533                                 }
1534                                 if (fb_drivers[i].setup)
1535                                         fb_drivers[i].setup(options+j+1);
1536                         }
1537                         return 0;
1538                 }
1539         }
1540
1541         /*
1542          * If we get here no fb was specified.
1543          * We consider the argument to be a global video mode option.
1544          */
1545         global_mode_option = options;
1546         return 0;
1547 }
1548
1549 __setup("video=", video_setup);
1550
1551     /*
1552      *  Visible symbols for modules
1553      */
1554
1555 EXPORT_SYMBOL(register_framebuffer);
1556 EXPORT_SYMBOL(unregister_framebuffer);
1557 EXPORT_SYMBOL(num_registered_fb);
1558 EXPORT_SYMBOL(registered_fb);
1559 EXPORT_SYMBOL(fb_prepare_logo);
1560 EXPORT_SYMBOL(fb_show_logo);
1561 EXPORT_SYMBOL(fb_set_var);
1562 EXPORT_SYMBOL(fb_blank);
1563 EXPORT_SYMBOL(fb_pan_display);
1564 EXPORT_SYMBOL(fb_get_buffer_offset);
1565 EXPORT_SYMBOL(fb_iomove_buf_unaligned);
1566 EXPORT_SYMBOL(fb_iomove_buf_aligned);
1567 EXPORT_SYMBOL(fb_sysmove_buf_unaligned);
1568 EXPORT_SYMBOL(fb_sysmove_buf_aligned);
1569 EXPORT_SYMBOL(fb_load_cursor_image);
1570 EXPORT_SYMBOL(fb_set_suspend);
1571 EXPORT_SYMBOL(fb_register_client);
1572 EXPORT_SYMBOL(fb_unregister_client);
1573
1574 MODULE_LICENSE("GPL");