Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 | /* * linux/drivers/video/fbmem.c * * Copyright (C) 1994 Martin Schaller * * This file is subject to the terms and conditions of the GNU General Public * License. See the file COPYING in the main directory of this archive * for more details. */ #include <linux/config.h> #include <linux/module.h> #include <linux/types.h> #include <linux/errno.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/major.h> #include <linux/malloc.h> #include <linux/mman.h> #include <linux/tty.h> #include <linux/console.h> #include <linux/init.h> #include <linux/proc_fs.h> #ifdef CONFIG_KMOD #include <linux/kmod.h> #endif #include <linux/devfs_fs_kernel.h> #if defined(__mc68000__) || defined(CONFIG_APUS) #include <asm/setup.h> #endif #include <asm/io.h> #include <asm/uaccess.h> #include <asm/page.h> #include <asm/pgtable.h> #include <linux/fb.h> #include <video/fbcon.h> /* * Frame buffer device initialization and setup routines */ extern int acornfb_init(void); extern int acornfb_setup(char*); extern int amifb_init(void); extern int amifb_setup(char*); extern int atafb_init(void); extern int atafb_setup(char*); extern int macfb_init(void); extern int macfb_setup(char*); extern int cyberfb_init(void); extern int cyberfb_setup(char*); extern int pm2fb_init(void); extern int pm2fb_setup(char*); extern int cyber2000fb_init(void); extern int cyber2000fb_setup(char*); extern int retz3fb_init(void); extern int retz3fb_setup(char*); extern int clgenfb_init(void); extern int clgenfb_setup(char*); extern int hitfb_init(void); extern int hitfb_setup(char*); extern int vfb_init(void); extern int vfb_setup(char*); extern int offb_init(void); extern int offb_setup(char*); extern int atyfb_init(void); extern int atyfb_setup(char*); extern int aty128fb_init(void); extern int aty128fb_setup(char*); extern int igafb_init(void); extern int igafb_setup(char*); extern int imsttfb_init(void); extern int imsttfb_setup(char*); extern int dnfb_init(void); extern int tgafb_init(void); extern int tgafb_setup(char*); extern int virgefb_init(void); extern int virgefb_setup(char*); extern int resolver_video_setup(char*); extern int s3triofb_init(void); extern int s3triofb_setup(char*); extern int vesafb_init(void); extern int vesafb_setup(char*); extern int vga16fb_init(void); extern int vga16fb_setup(char*); extern int hgafb_init(void); extern int hgafb_setup(char*); extern int matroxfb_init(void); extern int matroxfb_setup(char*); extern int hpfb_init(void); extern int hpfb_setup(char*); extern int sbusfb_init(void); extern int sbusfb_setup(char*); extern int valkyriefb_init(void); extern int valkyriefb_setup(char*); extern int control_init(void); extern int control_setup(char*); extern int g364fb_init(void); extern void sa1100fb_init(void); extern void sa1100fb_setup(char*); extern int fm2fb_init(void); extern int fm2fb_setup(char*); extern int q40fb_init(void); extern int sun3fb_init(void); extern int sun3fb_setup(char *); extern int sgivwfb_init(void); extern int sgivwfb_setup(char*); extern int rivafb_init(void); extern int rivafb_setup(char*); extern int tdfxfb_init(void); extern int tdfxfb_setup(char*); extern int sisfb_init(void); extern int sisfb_setup(char*); static struct { const char *name; int (*init)(void); int (*setup)(char*); } fb_drivers[] __initdata = { #ifdef CONFIG_FB_SBUS /* * Sbusfb must be initialized _before_ other frame buffer devices that * use PCI probing */ { "sbus", sbusfb_init, sbusfb_setup }, #endif #ifdef CONFIG_FB_3DFX { "tdfx", tdfxfb_init, tdfxfb_setup }, #endif #ifdef CONFIG_FB_SGIVW { "sgivw", sgivwfb_init, sgivwfb_setup }, #endif #ifdef CONFIG_FB_RETINAZ3 { "retz3", retz3fb_init, retz3fb_setup }, #endif #ifdef CONFIG_FB_ACORN { "acorn", acornfb_init, acornfb_setup }, #endif #ifdef CONFIG_FB_AMIGA { "amifb", amifb_init, amifb_setup }, #endif #ifdef CONFIG_FB_ATARI { "atafb", atafb_init, atafb_setup }, #endif #ifdef CONFIG_FB_MAC { "macfb", macfb_init, macfb_setup }, #endif #ifdef CONFIG_FB_CYBER { "cyber", cyberfb_init, cyberfb_setup }, #endif #ifdef CONFIG_FB_CYBER2000 { "cyber2000", cyber2000fb_init, cyber2000fb_setup }, #endif #ifdef CONFIG_FB_PM2 { "pm2fb", pm2fb_init, pm2fb_setup }, #endif #ifdef CONFIG_FB_CLGEN { "clgen", clgenfb_init, clgenfb_setup }, #endif #ifdef CONFIG_FB_ATY { "atyfb", atyfb_init, atyfb_setup }, #endif #ifdef CONFIG_FB_MATROX { "matrox", matroxfb_init, matroxfb_setup }, #endif #ifdef CONFIG_FB_ATY128 { "aty128fb", aty128fb_init, aty128fb_setup }, #endif #ifdef CONFIG_FB_OF /* * Offb must be initialized _after_ all other frame buffer devices * that use PCI probing and PCI resources! [ Geert ] */ { "offb", offb_init, offb_setup }, #endif #ifdef CONFIG_FB_IGA { "igafb", igafb_init, igafb_setup }, #endif #ifdef CONFIG_FB_IMSTT { "imsttfb", imsttfb_init, imsttfb_setup }, #endif #ifdef CONFIG_APOLLO { "apollo", dnfb_init, NULL }, #endif #ifdef CONFIG_FB_Q40 { "q40fb", q40fb_init, NULL }, #endif #ifdef CONFIG_FB_S3TRIO { "s3trio", s3triofb_init, s3triofb_setup }, #endif #ifdef CONFIG_FB_TGA { "tga", tgafb_init, tgafb_setup }, #endif #ifdef CONFIG_FB_VIRGE { "virge", virgefb_init, virgefb_setup }, #endif #ifdef CONFIG_FB_RIVA { "riva", rivafb_init, rivafb_setup }, #endif #ifdef CONFIG_FB_VESA { "vesa", vesafb_init, vesafb_setup }, #endif #ifdef CONFIG_FB_VGA16 { "vga16", vga16fb_init, vga16fb_setup }, #endif #ifdef CONFIG_FB_HGA { "hga", hgafb_init, hgafb_setup }, #endif #ifdef CONFIG_FB_HP300 { "hpfb", hpfb_init, hpfb_setup }, #endif #ifdef CONFIG_FB_CONTROL { "controlfb", control_init, control_setup }, #endif #ifdef CONFIG_FB_VALKYRIE { "valkyriefb", valkyriefb_init, valkyriefb_setup }, #endif #ifdef CONFIG_FB_G364 { "g364", g364fb_init, NULL }, #endif #ifdef CONFIG_FB_SA1100 { "sa1100", sa1100fb_init, sa1100fb_setup }, #endif #ifdef CONFIG_FB_FM2 { "fm2fb", fm2fb_init, fm2fb_setup }, #endif #ifdef CONFIG_FB_SUN3 { "sun3", sun3fb_init, sun3fb_setup }, #endif #ifdef CONFIG_FB_HIT { "hitfb", hitfb_init, hitfb_setup }, #endif #ifdef CONFIG_GSP_RESOLVER /* Not a real frame buffer device... */ { "resolver", NULL, resolver_video_setup }, #endif #ifdef CONFIG_FB_SIS { "sisfb", sisfb_init, sisfb_setup }, #endif #ifdef CONFIG_FB_VIRTUAL /* Must be last to avoid that vfb becomes your primary display */ { "vfb", vfb_init, vfb_setup }, #endif }; #define NUM_FB_DRIVERS (sizeof(fb_drivers)/sizeof(*fb_drivers)) extern const char *global_mode_option; static initcall_t pref_init_funcs[FB_MAX]; static int num_pref_init_funcs __initdata = 0; struct fb_info *registered_fb[FB_MAX]; int num_registered_fb = 0; extern int fbcon_softback_size; static int first_fb_vc = 0; static int last_fb_vc = MAX_NR_CONSOLES-1; static int fbcon_is_default = 1; static int fbmem_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *private) { struct fb_info **fi; int clen; clen = 0; for (fi = registered_fb; fi < ®istered_fb[FB_MAX] && len < 4000; fi++) if (*fi) clen += sprintf(buf + clen, "%d %s\n", GET_FB_IDX((*fi)->node), (*fi)->modename); *start = buf + offset; if (clen > offset) clen -= offset; else clen = 0; return clen < len ? clen : len; } static ssize_t fb_read(struct file *file, char *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; struct inode *inode = file->f_dentry->d_inode; int fbidx = GET_FB_IDX(inode->i_rdev); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; struct fb_fix_screeninfo fix; if (! fb || ! info->disp) return -ENODEV; fb->fb_get_fix(&fix,PROC_CONSOLE(info), info); if (p >= fix.smem_len) return 0; if (count >= fix.smem_len) count = fix.smem_len; if (count + p > fix.smem_len) count = fix.smem_len - p; if (count) { char *base_addr; base_addr = info->disp->screen_base; count -= copy_to_user(buf, base_addr+p, count); if (!count) return -EFAULT; *ppos += count; } return count; } static ssize_t fb_write(struct file *file, const char *buf, size_t count, loff_t *ppos) { unsigned long p = *ppos; struct inode *inode = file->f_dentry->d_inode; int fbidx = GET_FB_IDX(inode->i_rdev); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; struct fb_fix_screeninfo fix; int err; if (! fb || ! info->disp) return -ENODEV; fb->fb_get_fix(&fix, PROC_CONSOLE(info), info); if (p > fix.smem_len) return -ENOSPC; if (count >= fix.smem_len) count = fix.smem_len; err = 0; if (count + p > fix.smem_len) { count = fix.smem_len - p; err = -ENOSPC; } if (count) { char *base_addr; base_addr = info->disp->screen_base; count -= copy_from_user(base_addr+p, buf, count); *ppos += count; err = -EFAULT; } if (count) return count; return err; } #ifdef CONFIG_KMOD static void try_to_load(int fb) { char modname[16]; sprintf(modname, "fb%d", fb); request_module(modname); } #endif /* CONFIG_KMOD */ static int fb_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { int fbidx = GET_FB_IDX(inode->i_rdev); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; struct fb_cmap cmap; struct fb_var_screeninfo var; struct fb_fix_screeninfo fix; struct fb_con2fbmap con2fb; int i; if (! fb) return -ENODEV; switch (cmd) { case FBIOGET_VSCREENINFO: if ((i = fb->fb_get_var(&var, PROC_CONSOLE(info), info))) return i; return copy_to_user((void *) arg, &var, sizeof(var)) ? -EFAULT : 0; case FBIOPUT_VSCREENINFO: if (copy_from_user(&var, (void *) arg, sizeof(var))) return -EFAULT; i = var.activate & FB_ACTIVATE_ALL ? set_all_vcs(fbidx, fb, &var, info) : fb->fb_set_var(&var, PROC_CONSOLE(info), info); if (i) return i; if (copy_to_user((void *) arg, &var, sizeof(var))) return -EFAULT; return 0; case FBIOGET_FSCREENINFO: if ((i = fb->fb_get_fix(&fix, PROC_CONSOLE(info), info))) return i; return copy_to_user((void *) arg, &fix, sizeof(fix)) ? -EFAULT : 0; case FBIOPUTCMAP: if (copy_from_user(&cmap, (void *) arg, sizeof(cmap))) return -EFAULT; return (fb->fb_set_cmap(&cmap, 0, PROC_CONSOLE(info), info)); case FBIOGETCMAP: if (copy_from_user(&cmap, (void *) arg, sizeof(cmap))) return -EFAULT; return (fb->fb_get_cmap(&cmap, 0, PROC_CONSOLE(info), info)); case FBIOPAN_DISPLAY: if (copy_from_user(&var, (void *) arg, sizeof(var))) return -EFAULT; if ((i=fb->fb_pan_display(&var, PROC_CONSOLE(info), info))) return i; if (copy_to_user((void *) arg, &var, sizeof(var))) return -EFAULT; return i; case FBIOGET_CON2FBMAP: if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb))) return -EFAULT; if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; con2fb.framebuffer = con2fb_map[con2fb.console-1]; return copy_to_user((void *)arg, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; case FBIOPUT_CON2FBMAP: if (copy_from_user(&con2fb, (void *)arg, sizeof(con2fb))) return - EFAULT; if (con2fb.console < 0 || con2fb.console > MAX_NR_CONSOLES) return -EINVAL; if (con2fb.framebuffer < 0 || con2fb.framebuffer >= FB_MAX) return -EINVAL; #ifdef CONFIG_KMOD if (!registered_fb[con2fb.framebuffer]) try_to_load(con2fb.framebuffer); #endif /* CONFIG_KMOD */ if (!registered_fb[con2fb.framebuffer]) return -EINVAL; if (con2fb.console != 0) set_con2fb_map(con2fb.console-1, con2fb.framebuffer); else /* set them all */ for (i = 0; i < MAX_NR_CONSOLES; i++) set_con2fb_map(i, con2fb.framebuffer); return 0; case FBIOBLANK: if (info->blank == 0) return -EINVAL; (*info->blank)(arg, info); return 0; default: return fb->fb_ioctl(inode, file, cmd, arg, PROC_CONSOLE(info), info); } } static int fb_mmap(struct file *file, struct vm_area_struct * vma) { int fbidx = GET_FB_IDX(file->f_dentry->d_inode->i_rdev); struct fb_info *info = registered_fb[fbidx]; struct fb_ops *fb = info->fbops; unsigned long off; #if !defined(__sparc__) || defined(__sparc_v9__) struct fb_fix_screeninfo fix; struct fb_var_screeninfo var; unsigned long start; u32 len; #endif if (vma->vm_pgoff > (~0UL >> PAGE_SHIFT)) return -EINVAL; off = vma->vm_pgoff << PAGE_SHIFT; if (!fb) return -ENODEV; if (fb->fb_mmap) return fb->fb_mmap(info, file, vma); #if defined(__sparc__) && !defined(__sparc_v9__) /* Should never get here, all fb drivers should have their own mmap routines */ return -EINVAL; #else /* !sparc32... */ fb->fb_get_fix(&fix, PROC_CONSOLE(info), info); /* frame buffer memory */ start = fix.smem_start; len = PAGE_ALIGN((start & ~PAGE_MASK)+fix.smem_len); if (off >= len) { /* memory mapped io */ off -= len; fb->fb_get_var(&var, PROC_CONSOLE(info), info); if (var.accel_flags) return -EINVAL; start = fix.mmio_start; len = PAGE_ALIGN((start & ~PAGE_MASK)+fix.mmio_len); } start &= PAGE_MASK; if ((vma->vm_end - vma->vm_start + off) > len) return -EINVAL; off += start; vma->vm_pgoff = off >> PAGE_SHIFT; #if defined(__sparc_v9__) vma->vm_flags |= (VM_SHM | VM_LOCKED); { unsigned long align, j; for (align = 0x400000; align > PAGE_SIZE; align >>= 3) if (len >= align && !((start & ~PAGE_MASK) & (align - 1))) break; if (align > PAGE_SIZE && vma->vm_start & (align - 1)) { /* align as much as possible */ struct vm_area_struct *vmm; j = (-vma->vm_start) & (align - 1); vmm = find_vma(current->mm, vma->vm_start); if (!vmm || vmm->vm_start >= vma->vm_end + j) { vma->vm_start += j; vma->vm_end += j; } } } if (io_remap_page_range(vma->vm_start, off, vma->vm_end - vma->vm_start, vma->vm_page_prot, 0)) return -EAGAIN; vma->vm_flags |= VM_IO; #else #if defined(__mc68000__) #if defined(CONFIG_SUN3) pgprot_val(vma->vm_page_prot) |= SUN3_PAGE_NOCACHE; #else if (CPU_IS_020_OR_030) pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE030; if (CPU_IS_040_OR_060) { pgprot_val(vma->vm_page_prot) &= _CACHEMASK040; /* Use no-cache mode, serialized */ pgprot_val(vma->vm_page_prot) |= _PAGE_NOCACHE_S; } #endif #elif defined(__powerpc__) pgprot_val(vma->vm_page_prot) |= _PAGE_NO_CACHE|_PAGE_GUARDED; #elif defined(__alpha__) /* Caching is off in the I/O space quadrant by design. */ #elif defined(__i386__) if (boot_cpu_data.x86 > 3) pgprot_val(vma->vm_page_prot) |= _PAGE_PCD; #elif defined(__mips__) pgprot_val(vma->vm_page_prot) &= ~_CACHE_MASK; pgprot_val(vma->vm_page_prot) |= _CACHE_UNCACHED; #elif defined(__arm__) #if defined(CONFIG_CPU_32) && !defined(CONFIG_ARCH_ACORN) /* On Acorn architectures, we want to keep the framebuffer * cached. */ pgprot_val(vma->vm_page_prot) &= ~(PTE_CACHEABLE | PTE_BUFFERABLE); #endif #elif defined(__sh__) pgprot_val(vma->vm_page_prot) &= ~_PAGE_CACHABLE; #else #warning What do we have to do here?? #endif if (io_remap_page_range(vma->vm_start, off, vma->vm_end - vma->vm_start, vma->vm_page_prot)) return -EAGAIN; #endif /* !__sparc_v9__ */ return 0; #endif /* !sparc32 */ } #if 1 /* to go away in 2.5.0 */ int GET_FB_IDX(kdev_t rdev) { int fbidx = MINOR(rdev); if (fbidx >= 32) { int newfbidx = fbidx >> 5; static int warned = 0; if (!(warned & (1<<newfbidx))) { warned |= 1<<newfbidx; printk("Warning: Remapping obsolete /dev/fb* minor %d to %d\n", fbidx, newfbidx); } fbidx = newfbidx; } return fbidx; } #endif static int fb_open(struct inode *inode, struct file *file) { int fbidx = GET_FB_IDX(inode->i_rdev); struct fb_info *info; int res = 0; #ifdef CONFIG_KMOD if (!(info = registered_fb[fbidx])) try_to_load(fbidx); #endif /* CONFIG_KMOD */ if (!(info = registered_fb[fbidx])) return -ENODEV; if (info->fbops->owner) __MOD_INC_USE_COUNT(info->fbops->owner); if (info->fbops->fb_open) { res = info->fbops->fb_open(info,1); if (res && info->fbops->owner) __MOD_DEC_USE_COUNT(info->fbops->owner); } return res; } static int fb_release(struct inode *inode, struct file *file) { int fbidx = GET_FB_IDX(inode->i_rdev); struct fb_info *info = registered_fb[fbidx]; if (info->fbops->fb_release) info->fbops->fb_release(info,1); if (info->fbops->owner) __MOD_DEC_USE_COUNT(info->fbops->owner); return 0; } static struct file_operations fb_fops = { owner: THIS_MODULE, read: fb_read, write: fb_write, ioctl: fb_ioctl, mmap: fb_mmap, open: fb_open, release: fb_release, }; static devfs_handle_t devfs_handle = NULL; int register_framebuffer(struct fb_info *fb_info) { int i, j; char name_buf[8]; static int fb_ever_opened[FB_MAX]; static int first = 1; if (num_registered_fb == FB_MAX) return -ENXIO; num_registered_fb++; for (i = 0 ; i < FB_MAX; i++) if (!registered_fb[i]) break; fb_info->node = MKDEV(FB_MAJOR, i); registered_fb[i] = fb_info; if (!fb_ever_opened[i]) { struct module *owner = fb_info->fbops->owner; /* * We assume initial frame buffer devices can be opened this * many times */ for (j = 0; j < MAX_NR_CONSOLES; j++) if (con2fb_map[j] == i) { if (owner) __MOD_INC_USE_COUNT(owner); if (!fb_info->fbops->fb_open) continue; if (!fb_info->fbops->fb_open(fb_info,0)) continue; if (owner) __MOD_DEC_USE_COUNT(owner); } fb_ever_opened[i] = 1; } if (first) { first = 0; take_over_console(&fb_con, first_fb_vc, last_fb_vc, fbcon_is_default); } sprintf (name_buf, "%d", i); fb_info->devfs_handle = devfs_register (devfs_handle, name_buf, DEVFS_FL_DEFAULT, FB_MAJOR, i, S_IFCHR | S_IRUGO | S_IWUGO, &fb_fops, NULL); return 0; } int unregister_framebuffer(struct fb_info *fb_info) { int i, j; i = GET_FB_IDX(fb_info->node); for (j = 0; j < MAX_NR_CONSOLES; j++) if (con2fb_map[j] == i) return -EBUSY; if (!registered_fb[i]) return -EINVAL; devfs_unregister (fb_info->devfs_handle); fb_info->devfs_handle = NULL; devfs_unregister (fb_info->devfs_lhandle); fb_info->devfs_lhandle = NULL; registered_fb[i]=NULL; num_registered_fb--; return 0; } void __init fbmem_init(void) { int i; create_proc_read_entry("fb", 0, 0, fbmem_read_proc, NULL); devfs_handle = devfs_mk_dir (NULL, "fb", NULL); if (devfs_register_chrdev(FB_MAJOR,"fb",&fb_fops)) printk("unable to get major %d for fb devs\n", FB_MAJOR); /* * Probe for all builtin frame buffer devices */ for (i = 0; i < num_pref_init_funcs; i++) pref_init_funcs[i](); for (i = 0; i < NUM_FB_DRIVERS; i++) if (fb_drivers[i].init) fb_drivers[i].init(); } /* * Command line options */ int __init video_setup(char *options) { int i, j; if (!options || !*options) return 0; if (!strncmp(options, "scrollback:", 11)) { options += 11; if (*options) { fbcon_softback_size = simple_strtoul(options, &options, 0); if (*options == 'k' || *options == 'K') { fbcon_softback_size *= 1024; options++; } if (*options != ',') return 0; options++; } else return 0; } if (!strncmp(options, "map:", 4)) { options += 4; if (*options) for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { if (!options[j]) j = 0; con2fb_map[i] = (options[j++]-'0') % FB_MAX; } return 0; } if (!strncmp(options, "vc:", 3)) { options += 3; if (*options) first_fb_vc = simple_strtoul(options, &options, 10) - 1; if (first_fb_vc < 0) first_fb_vc = 0; if (*options++ == '-') last_fb_vc = simple_strtoul(options, &options, 10) - 1; fbcon_is_default = 0; } if (num_pref_init_funcs == FB_MAX) return 0; for (i = 0; i < NUM_FB_DRIVERS; i++) { j = strlen(fb_drivers[i].name); if (!strncmp(options, fb_drivers[i].name, j) && options[j] == ':') { if (!strcmp(options+j+1, "off")) fb_drivers[i].init = NULL; else { if (fb_drivers[i].init) { pref_init_funcs[num_pref_init_funcs++] = fb_drivers[i].init; fb_drivers[i].init = NULL; } if (fb_drivers[i].setup) fb_drivers[i].setup(options+j+1); } return 0; } } /* * If we get here no fb was specified. * We consider the argument to be a global video mode option. */ global_mode_option = options; return 0; } __setup("video=", video_setup); /* * Visible symbols for modules */ EXPORT_SYMBOL(register_framebuffer); EXPORT_SYMBOL(unregister_framebuffer); EXPORT_SYMBOL(registered_fb); EXPORT_SYMBOL(num_registered_fb); #if 1 /* to go away in 2.5.0 */ EXPORT_SYMBOL(GET_FB_IDX); #endif |