1 /*- 2 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer as 10 * the first lines of this file unmodified. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the author may not be used to endorse or promote products 15 * derived from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/dev/fb/fb.c,v 1.11.2.2 2000/08/02 22:35:22 peter Exp $ 29 * $DragonFly: src/sys/dev/video/fb/fb.c,v 1.18 2007/04/30 07:18:52 dillon Exp $ 30 */ 31 32 #include "opt_fb.h" 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/conf.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/uio.h> 41 #include <sys/fbio.h> 42 #include <sys/linker_set.h> 43 #include <sys/device.h> 44 #include <sys/thread2.h> 45 46 #include <vm/vm.h> 47 #include <vm/pmap.h> 48 49 #include "fbreg.h" 50 51 SET_DECLARE(videodriver_set, const video_driver_t); 52 53 /* local arrays */ 54 55 /* 56 * We need at least one entry each in order to initialize a video card 57 * for the kernel console. The arrays will be increased dynamically 58 * when necessary. 59 */ 60 61 static int vid_malloc; 62 static int adapters = 1; 63 static video_adapter_t *adp_ini; 64 static video_adapter_t **adapter = &adp_ini; 65 static video_switch_t *vidsw_ini; 66 video_switch_t **vidsw = &vidsw_ini; 67 68 #ifdef FB_INSTALL_CDEV 69 static cdev_t vidcdevsw_ini; 70 static cdev_t *vidcdevsw = &vidcdevsw_ini; 71 #endif 72 73 #define ARRAY_DELTA 4 74 75 static int 76 vid_realloc_array(void) 77 { 78 video_adapter_t **new_adp; 79 video_switch_t **new_vidsw; 80 #ifdef FB_INSTALL_CDEV 81 cdev_t *new_cdevsw; 82 #endif 83 int newsize; 84 85 if (!vid_malloc) 86 return ENOMEM; 87 88 crit_enter(); 89 newsize = ((adapters + ARRAY_DELTA)/ARRAY_DELTA)*ARRAY_DELTA; 90 new_adp = kmalloc(sizeof(*new_adp)*newsize, M_DEVBUF, M_WAITOK | M_ZERO); 91 new_vidsw = kmalloc(sizeof(*new_vidsw)*newsize, M_DEVBUF, 92 M_WAITOK | M_ZERO); 93 #ifdef FB_INSTALL_CDEV 94 new_cdevsw = kmalloc(sizeof(*new_cdevsw)*newsize, M_DEVBUF, 95 M_WAITOK | M_ZERO); 96 #endif 97 bcopy(adapter, new_adp, sizeof(*adapter)*adapters); 98 bcopy(vidsw, new_vidsw, sizeof(*vidsw)*adapters); 99 #ifdef FB_INSTALL_CDEV 100 bcopy(vidcdevsw, new_cdevsw, sizeof(*vidcdevsw)*adapters); 101 #endif 102 if (adapters > 1) { 103 kfree(adapter, M_DEVBUF); 104 kfree(vidsw, M_DEVBUF); 105 #ifdef FB_INSTALL_CDEV 106 kfree(vidcdevsw, M_DEVBUF); 107 #endif 108 } 109 adapter = new_adp; 110 vidsw = new_vidsw; 111 #ifdef FB_INSTALL_CDEV 112 vidcdevsw = new_cdevsw; 113 #endif 114 adapters = newsize; 115 crit_exit(); 116 117 if (bootverbose) 118 kprintf("fb: new array size %d\n", adapters); 119 120 return 0; 121 } 122 123 static void 124 vid_malloc_init(void *arg) 125 { 126 vid_malloc = TRUE; 127 } 128 129 SYSINIT(vid_mem, SI_BOOT1_POST, SI_ORDER_ANY, vid_malloc_init, NULL); 130 131 /* 132 * Low-level frame buffer driver functions 133 * frame buffer subdrivers, such as the VGA driver, call these functions 134 * to initialize the video_adapter structure and register it to the virtual 135 * frame buffer driver `fb'. 136 */ 137 138 /* initialize the video_adapter_t structure */ 139 void 140 vid_init_struct(video_adapter_t *adp, char *name, int type, int unit) 141 { 142 adp->va_flags = 0; 143 adp->va_name = name; 144 adp->va_type = type; 145 adp->va_unit = unit; 146 } 147 148 /* Register a video adapter */ 149 int 150 vid_register(video_adapter_t *adp) 151 { 152 const video_driver_t **list; 153 const video_driver_t *p; 154 int index; 155 156 for (index = 0; index < adapters; ++index) { 157 if (adapter[index] == NULL) 158 break; 159 } 160 if (index >= adapters) { 161 if (vid_realloc_array()) 162 return -1; 163 } 164 165 adp->va_index = index; 166 adp->va_token = NULL; 167 SET_FOREACH(list, videodriver_set) { 168 p = *list; 169 if (strcmp(p->name, adp->va_name) == 0) { 170 adapter[index] = adp; 171 vidsw[index] = p->vidsw; 172 return index; 173 } 174 } 175 176 return -1; 177 } 178 179 int 180 vid_unregister(video_adapter_t *adp) 181 { 182 if ((adp->va_index < 0) || (adp->va_index >= adapters)) 183 return ENOENT; 184 if (adapter[adp->va_index] != adp) 185 return ENOENT; 186 187 adapter[adp->va_index] = NULL; 188 vidsw[adp->va_index] = NULL; 189 return 0; 190 } 191 192 /* Get video I/O function table */ 193 video_switch_t * 194 vid_get_switch(char *name) 195 { 196 const video_driver_t **list; 197 const video_driver_t *p; 198 199 SET_FOREACH(list, videodriver_set) { 200 p = *list; 201 if (strcmp(p->name, name) == 0) 202 return p->vidsw; 203 } 204 205 return NULL; 206 } 207 208 /* 209 * Video card client functions 210 * Video card clients, such as the console driver `syscons' and the frame 211 * buffer cdev driver, use these functions to claim and release a card for 212 * exclusive use. 213 */ 214 215 /* find the video card specified by a driver name and a unit number */ 216 int 217 vid_find_adapter(char *driver, int unit) 218 { 219 int i; 220 221 for (i = 0; i < adapters; ++i) { 222 if (adapter[i] == NULL) 223 continue; 224 if (strcmp("*", driver) && strcmp(adapter[i]->va_name, driver)) 225 continue; 226 if ((unit != -1) && (adapter[i]->va_unit != unit)) 227 continue; 228 return i; 229 } 230 return -1; 231 } 232 233 /* allocate a video card */ 234 int 235 vid_allocate(char *driver, int unit, void *id) 236 { 237 int index; 238 239 crit_enter(); 240 index = vid_find_adapter(driver, unit); 241 if (index >= 0) { 242 if (adapter[index]->va_token) { 243 crit_exit(); 244 return -1; 245 } 246 adapter[index]->va_token = id; 247 } 248 crit_exit(); 249 return index; 250 } 251 252 int 253 vid_release(video_adapter_t *adp, void *id) 254 { 255 int error; 256 257 crit_enter(); 258 if (adp->va_token == NULL) { 259 error = EINVAL; 260 } else if (adp->va_token != id) { 261 error = EPERM; 262 } else { 263 adp->va_token = NULL; 264 error = 0; 265 } 266 crit_exit(); 267 return error; 268 } 269 270 /* Get a video adapter structure */ 271 video_adapter_t * 272 vid_get_adapter(int index) 273 { 274 if ((index < 0) || (index >= adapters)) 275 return NULL; 276 return adapter[index]; 277 } 278 279 /* Configure drivers: this is a backdoor for the console driver XXX */ 280 int 281 vid_configure(int flags) 282 { 283 const video_driver_t **list; 284 const video_driver_t *p; 285 286 SET_FOREACH(list, videodriver_set) { 287 p = *list; 288 if (p->configure != NULL) 289 (*p->configure)(flags); 290 } 291 292 return 0; 293 } 294 295 /* 296 * Virtual frame buffer cdev driver functions 297 * The virtual frame buffer driver dispatches driver functions to 298 * appropriate subdrivers. 299 */ 300 301 #define FB_DRIVER_NAME "fb" 302 303 #ifdef FB_INSTALL_CDEV 304 305 #if experimental 306 307 static devclass_t fb_devclass; 308 309 static int fbprobe(device_t dev); 310 static int fbattach(device_t dev); 311 312 static device_method_t fb_methods[] = { 313 DEVMETHOD(device_probe, fbprobe), 314 DEVMETHOD(device_attach, fbattach), 315 316 DEVMETHOD(bus_print_child, bus_generic_print_child), 317 { 0, 0 } 318 }; 319 320 static driver_t fb_driver = { 321 FB_DRIVER_NAME, 322 fb_methods, 323 0, 324 }; 325 326 static int 327 fbprobe(device_t dev) 328 { 329 int unit; 330 331 unit = device_get_unit(dev); 332 if (unit >= adapters) 333 return ENXIO; 334 if (adapter[unit] == NULL) 335 return ENXIO; 336 337 device_set_desc(dev, "generic frame buffer"); 338 return 0; 339 } 340 341 static int 342 fbattach(device_t dev) 343 { 344 kprintf("fbattach: about to attach children\n"); 345 bus_generic_attach(dev); 346 return 0; 347 } 348 349 #endif /* experimental */ 350 351 #define FB_UNIT(dev) minor(dev) 352 #define FB_MKMINOR(unit) (u) 353 354 static d_default_t fboperate; 355 static d_open_t fbopen; 356 357 #define CDEV_MAJOR 123 /* XXX */ 358 359 static struct dev_ops fb_ops = { 360 { FB_DRIVER_NAME, CDEV_MAJOR, 0 }, 361 .d_default = fboperate, 362 .d_open = fbopen 363 }; 364 365 static void 366 vfbattach(void *arg) 367 { 368 static int fb_devsw_installed = FALSE; 369 370 if (!fb_devsw_installed) { 371 dev_ops_add(&fb_ops, 0, 0); 372 fb_devsw_installed = TRUE; 373 } 374 } 375 376 PSEUDO_SET(vfbattach, fb); 377 378 /* 379 * Note: dev represents the actual video device, not the frame buffer 380 */ 381 int 382 fb_attach(cdev_t dev, video_adapter_t *adp) 383 { 384 if (adp->va_index >= adapters) 385 return EINVAL; 386 if (adapter[adp->va_index] != adp) 387 return EINVAL; 388 389 crit_enter(); 390 reference_dev(dev); 391 adp->va_minor = minor(dev); 392 vidcdevsw[adp->va_index] = dev; 393 crit_exit(); 394 395 kprintf("fb%d at %s%d\n", adp->va_index, adp->va_name, adp->va_unit); 396 return 0; 397 } 398 399 /* 400 * Note: dev represents the actual video device, not the frame buffer 401 */ 402 int 403 fb_detach(cdev_t dev, video_adapter_t *adp) 404 { 405 if (adp->va_index >= adapters) 406 return EINVAL; 407 if (adapter[adp->va_index] != adp) 408 return EINVAL; 409 if (vidcdevsw[adp->va_index] != dev) 410 return EINVAL; 411 412 crit_enter(); 413 vidcdevsw[adp->va_index] = NULL; 414 crit_exit(); 415 release_dev(dev); 416 return 0; 417 } 418 419 static int 420 fbopen(struct dev_open_args *ap) 421 { 422 cdev_t dev = ap->a_head.a_dev; 423 int unit; 424 cdev_t fdev; 425 426 unit = FB_UNIT(dev); 427 if (unit < 0 || unit >= adapters) 428 return ENXIO; 429 if ((fdev = vidcdevsw[unit]) == NULL) 430 return ENXIO; 431 return dev_dopen(fdev, ap->a_oflags, ap->a_devtype, ap->a_cred); 432 } 433 434 static int 435 fboperate(struct dev_generic_args *ap) 436 { 437 cdev_t dev = ap->a_dev; 438 int unit; 439 cdev_t fdev; 440 441 unit = FB_UNIT(dev); 442 if ((fdev = vidcdevsw[unit]) == NULL) 443 return ENXIO; 444 ap->a_dev = fdev; 445 return dev_doperate(ap); 446 } 447 448 /* 449 * Generic frame buffer cdev driver functions 450 * Frame buffer subdrivers may call these functions to implement common 451 * driver functions. 452 */ 453 454 int genfbopen(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode, 455 struct ucred *cred) 456 { 457 crit_enter(); 458 if (!(sc->gfb_flags & FB_OPEN)) 459 sc->gfb_flags |= FB_OPEN; 460 crit_exit(); 461 return 0; 462 } 463 464 int genfbclose(genfb_softc_t *sc, video_adapter_t *adp, int flag, int mode) 465 { 466 crit_enter(); 467 sc->gfb_flags &= ~FB_OPEN; 468 crit_exit(); 469 return 0; 470 } 471 472 int genfbread(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio, 473 int flag) 474 { 475 int size; 476 int offset; 477 int error; 478 int len; 479 480 error = 0; 481 size = adp->va_buffer_size/adp->va_info.vi_planes; 482 while (uio->uio_resid > 0) { 483 if (uio->uio_offset >= size) 484 break; 485 offset = uio->uio_offset%adp->va_window_size; 486 len = imin(uio->uio_resid, size - uio->uio_offset); 487 len = imin(len, adp->va_window_size - offset); 488 if (len <= 0) 489 break; 490 (*vidsw[adp->va_index]->set_win_org)(adp, uio->uio_offset); 491 error = uiomove((caddr_t)(adp->va_window + offset), len, uio); 492 if (error) 493 break; 494 } 495 return error; 496 } 497 498 int genfbwrite(genfb_softc_t *sc, video_adapter_t *adp, struct uio *uio, 499 int flag) 500 { 501 return ENODEV; 502 } 503 504 int genfbioctl(genfb_softc_t *sc, video_adapter_t *adp, u_long cmd, 505 caddr_t arg, int flag, struct ucred *cred) 506 { 507 int error; 508 509 if (adp == NULL) /* XXX */ 510 return ENXIO; 511 error = (*vidsw[adp->va_index]->ioctl)(adp, cmd, arg); 512 if (error == ENOIOCTL) 513 error = ENODEV; 514 return error; 515 } 516 517 int genfbmmap(genfb_softc_t *sc, video_adapter_t *adp, vm_offset_t offset, 518 int prot) 519 { 520 return (*vidsw[adp->va_index]->mmap)(adp, offset, prot); 521 } 522 523 #endif /* FB_INSTALL_CDEV */ 524 525 static char * 526 adapter_name(int type) 527 { 528 static struct { 529 int type; 530 char *name; 531 } names[] = { 532 { KD_MONO, "MDA" }, 533 { KD_HERCULES, "Hercules" }, 534 { KD_CGA, "CGA" }, 535 { KD_EGA, "EGA" }, 536 { KD_VGA, "VGA" }, 537 { KD_TGA, "TGA" }, 538 { -1, "Unknown" }, 539 }; 540 int i; 541 542 for (i = 0; names[i].type != -1; ++i) 543 if (names[i].type == type) 544 break; 545 return names[i].name; 546 } 547 548 /* 549 * Generic low-level frame buffer functions 550 * The low-level functions in the frame buffer subdriver may use these 551 * functions. 552 */ 553 554 void 555 fb_dump_adp_info(char *driver, video_adapter_t *adp, int level) 556 { 557 if (level <= 0) 558 return; 559 560 kprintf("%s%d: %s%d, %s, type:%s (%d), flags:0x%x\n", 561 FB_DRIVER_NAME, adp->va_index, driver, adp->va_unit, adp->va_name, 562 adapter_name(adp->va_type), adp->va_type, adp->va_flags); 563 kprintf("%s%d: port:0x%x-0x%x, crtc:0x%x, mem:0x%x 0x%x\n", 564 FB_DRIVER_NAME, adp->va_index, 565 adp->va_io_base, adp->va_io_base + adp->va_io_size - 1, 566 adp->va_crtc_addr, adp->va_mem_base, adp->va_mem_size); 567 kprintf("%s%d: init mode:%d, bios mode:%d, current mode:%d\n", 568 FB_DRIVER_NAME, adp->va_index, 569 adp->va_initial_mode, adp->va_initial_bios_mode, adp->va_mode); 570 kprintf("%s%d: window:%p size:%dk gran:%dk, buf:%p size:%dk\n", 571 FB_DRIVER_NAME, adp->va_index, 572 (void *)adp->va_window, (int)adp->va_window_size/1024, 573 (int)adp->va_window_gran/1024, (void *)adp->va_buffer, 574 (int)adp->va_buffer_size/1024); 575 } 576 577 void 578 fb_dump_mode_info(char *driver, video_adapter_t *adp, video_info_t *info, 579 int level) 580 { 581 if (level <= 0) 582 return; 583 584 kprintf("%s%d: %s, mode:%d, flags:0x%x ", 585 driver, adp->va_unit, adp->va_name, info->vi_mode, info->vi_flags); 586 if (info->vi_flags & V_INFO_GRAPHICS) 587 kprintf("G %dx%dx%d, %d plane(s), font:%dx%d, ", 588 info->vi_width, info->vi_height, 589 info->vi_depth, info->vi_planes, 590 info->vi_cwidth, info->vi_cheight); 591 else 592 kprintf("T %dx%d, font:%dx%d, ", 593 info->vi_width, info->vi_height, 594 info->vi_cwidth, info->vi_cheight); 595 kprintf("win:0x%x\n", info->vi_window); 596 } 597 598 int 599 fb_type(int adp_type) 600 { 601 static struct { 602 int fb_type; 603 int va_type; 604 } types[] = { 605 { FBTYPE_MDA, KD_MONO }, 606 { FBTYPE_HERCULES, KD_HERCULES }, 607 { FBTYPE_CGA, KD_CGA }, 608 { FBTYPE_EGA, KD_EGA }, 609 { FBTYPE_VGA, KD_VGA }, 610 { FBTYPE_TGA, KD_TGA }, 611 }; 612 int i; 613 614 for (i = 0; i < sizeof(types)/sizeof(types[0]); ++i) { 615 if (types[i].va_type == adp_type) 616 return types[i].fb_type; 617 } 618 return -1; 619 } 620 621 int 622 fb_commonioctl(video_adapter_t *adp, u_long cmd, caddr_t arg) 623 { 624 int error; 625 626 /* assert(adp != NULL) */ 627 628 error = 0; 629 crit_enter(); 630 631 switch (cmd) { 632 633 case FBIO_ADAPTER: /* get video adapter index */ 634 *(int *)arg = adp->va_index; 635 break; 636 637 case FBIO_ADPTYPE: /* get video adapter type */ 638 *(int *)arg = adp->va_type; 639 break; 640 641 case FBIO_ADPINFO: /* get video adapter info */ 642 ((video_adapter_info_t *)arg)->va_index = adp->va_index; 643 ((video_adapter_info_t *)arg)->va_type = adp->va_type; 644 bcopy(adp->va_name, ((video_adapter_info_t *)arg)->va_name, 645 imin(strlen(adp->va_name) + 1, 646 sizeof(((video_adapter_info_t *)arg)->va_name))); 647 ((video_adapter_info_t *)arg)->va_unit = adp->va_unit; 648 ((video_adapter_info_t *)arg)->va_flags = adp->va_flags; 649 ((video_adapter_info_t *)arg)->va_io_base = adp->va_io_base; 650 ((video_adapter_info_t *)arg)->va_io_size = adp->va_io_size; 651 ((video_adapter_info_t *)arg)->va_crtc_addr = adp->va_crtc_addr; 652 ((video_adapter_info_t *)arg)->va_mem_base = adp->va_mem_base; 653 ((video_adapter_info_t *)arg)->va_mem_size = adp->va_mem_size; 654 ((video_adapter_info_t *)arg)->va_window 655 #ifdef __i386__ 656 = vtophys(adp->va_window); 657 #else 658 = adp->va_window; 659 #endif 660 ((video_adapter_info_t *)arg)->va_window_size 661 = adp->va_window_size; 662 ((video_adapter_info_t *)arg)->va_window_gran 663 = adp->va_window_gran; 664 ((video_adapter_info_t *)arg)->va_window_orig 665 = adp->va_window_orig; 666 ((video_adapter_info_t *)arg)->va_unused0 667 #ifdef __i386__ 668 = (adp->va_buffer) ? vtophys(adp->va_buffer) : 0; 669 #else 670 = adp->va_buffer; 671 #endif 672 ((video_adapter_info_t *)arg)->va_buffer_size 673 = adp->va_buffer_size; 674 ((video_adapter_info_t *)arg)->va_mode = adp->va_mode; 675 ((video_adapter_info_t *)arg)->va_initial_mode 676 = adp->va_initial_mode; 677 ((video_adapter_info_t *)arg)->va_initial_bios_mode 678 = adp->va_initial_bios_mode; 679 ((video_adapter_info_t *)arg)->va_line_width 680 = adp->va_line_width; 681 ((video_adapter_info_t *)arg)->va_disp_start.x 682 = adp->va_disp_start.x; 683 ((video_adapter_info_t *)arg)->va_disp_start.y 684 = adp->va_disp_start.y; 685 break; 686 687 case FBIO_MODEINFO: /* get mode information */ 688 error = (*vidsw[adp->va_index]->get_info)(adp, 689 ((video_info_t *)arg)->vi_mode, 690 (video_info_t *)arg); 691 if (error) 692 error = ENODEV; 693 break; 694 695 case FBIO_FINDMODE: /* find a matching video mode */ 696 error = (*vidsw[adp->va_index]->query_mode)(adp, 697 (video_info_t *)arg); 698 break; 699 700 case FBIO_GETMODE: /* get video mode */ 701 *(int *)arg = adp->va_mode; 702 break; 703 704 case FBIO_SETMODE: /* set video mode */ 705 error = (*vidsw[adp->va_index]->set_mode)(adp, *(int *)arg); 706 if (error) 707 error = ENODEV; /* EINVAL? */ 708 break; 709 710 case FBIO_GETWINORG: /* get frame buffer window origin */ 711 *(u_int *)arg = adp->va_window_orig; 712 break; 713 714 case FBIO_GETDISPSTART: /* get display start address */ 715 ((video_display_start_t *)arg)->x = adp->va_disp_start.x; 716 ((video_display_start_t *)arg)->y = adp->va_disp_start.y; 717 break; 718 719 case FBIO_GETLINEWIDTH: /* get scan line width in bytes */ 720 *(u_int *)arg = adp->va_line_width; 721 break; 722 723 case FBIO_GETPALETTE: /* get color palette */ 724 case FBIO_SETPALETTE: /* set color palette */ 725 /* XXX */ 726 727 case FBIOPUTCMAP: 728 case FBIOGETCMAP: 729 /* XXX */ 730 731 case FBIO_SETWINORG: /* set frame buffer window origin */ 732 case FBIO_SETDISPSTART: /* set display start address */ 733 case FBIO_SETLINEWIDTH: /* set scan line width in pixel */ 734 735 case FBIOGTYPE: 736 case FBIOGATTR: 737 case FBIOSVIDEO: 738 case FBIOGVIDEO: 739 case FBIOSCURSOR: 740 case FBIOGCURSOR: 741 case FBIOSCURPOS: 742 case FBIOGCURPOS: 743 case FBIOGCURMAX: 744 745 default: 746 error = ENODEV; 747 break; 748 } 749 750 crit_exit(); 751 return error; 752 } 753