1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/slab.h> 68 #include <linux/fb.h> 69 #include <linux/fbcon.h> 70 #include <linux/vt_kern.h> 71 #include <linux/selection.h> 72 #include <linux/font.h> 73 #include <linux/smp.h> 74 #include <linux/init.h> 75 #include <linux/interrupt.h> 76 #include <linux/crc32.h> /* For counting font checksums */ 77 #include <linux/uaccess.h> 78 #include <asm/fb.h> 79 #include <asm/irq.h> 80 81 #include "fbcon.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 90 * means concurrent access to the same fbdev from both fbcon and userspace 91 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 92 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 93 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 94 * fbmem.c cannot use locking asserts, and there's lots of callers which get 95 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 96 */ 97 98 enum { 99 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 100 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 101 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 102 }; 103 104 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 105 106 struct fb_info *fbcon_registered_fb[FB_MAX]; 107 int fbcon_num_registered_fb; 108 109 #define fbcon_for_each_registered_fb(i) \ 110 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 111 if (!fbcon_registered_fb[i]) {} else 112 113 static signed char con2fb_map[MAX_NR_CONSOLES]; 114 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 115 116 static struct fb_info *fbcon_info_from_console(int console) 117 { 118 WARN_CONSOLE_UNLOCKED(); 119 120 return fbcon_registered_fb[con2fb_map[console]]; 121 } 122 123 static int logo_lines; 124 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 125 enums. */ 126 static int logo_shown = FBCON_LOGO_CANSHOW; 127 /* console mappings */ 128 static unsigned int first_fb_vc; 129 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 130 static int fbcon_is_default = 1; 131 static int primary_device = -1; 132 static int fbcon_has_console_bind; 133 134 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 135 static int map_override; 136 137 static inline void fbcon_map_override(void) 138 { 139 map_override = 1; 140 } 141 #else 142 static inline void fbcon_map_override(void) 143 { 144 } 145 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 146 147 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 148 static bool deferred_takeover = true; 149 #else 150 #define deferred_takeover false 151 #endif 152 153 /* font data */ 154 static char fontname[40]; 155 156 /* current fb_info */ 157 static int info_idx = -1; 158 159 /* console rotation */ 160 static int initial_rotation = -1; 161 static int fbcon_has_sysfs; 162 static int margin_color; 163 164 static const struct consw fb_con; 165 166 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 167 168 static int fbcon_cursor_noblink; 169 170 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 171 172 /* 173 * Interface used by the world 174 */ 175 176 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 177 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 178 179 /* 180 * Internal routines 181 */ 182 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 183 int unit); 184 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 185 int line, int count, int dy); 186 static void fbcon_modechanged(struct fb_info *info); 187 static void fbcon_set_all_vcs(struct fb_info *info); 188 189 static struct device *fbcon_device; 190 191 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 192 static inline void fbcon_set_rotation(struct fb_info *info) 193 { 194 struct fbcon_ops *ops = info->fbcon_par; 195 196 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 197 ops->p->con_rotate < 4) 198 ops->rotate = ops->p->con_rotate; 199 else 200 ops->rotate = 0; 201 } 202 203 static void fbcon_rotate(struct fb_info *info, u32 rotate) 204 { 205 struct fbcon_ops *ops= info->fbcon_par; 206 struct fb_info *fb_info; 207 208 if (!ops || ops->currcon == -1) 209 return; 210 211 fb_info = fbcon_info_from_console(ops->currcon); 212 213 if (info == fb_info) { 214 struct fbcon_display *p = &fb_display[ops->currcon]; 215 216 if (rotate < 4) 217 p->con_rotate = rotate; 218 else 219 p->con_rotate = 0; 220 221 fbcon_modechanged(info); 222 } 223 } 224 225 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 226 { 227 struct fbcon_ops *ops = info->fbcon_par; 228 struct vc_data *vc; 229 struct fbcon_display *p; 230 int i; 231 232 if (!ops || ops->currcon < 0 || rotate > 3) 233 return; 234 235 for (i = first_fb_vc; i <= last_fb_vc; i++) { 236 vc = vc_cons[i].d; 237 if (!vc || vc->vc_mode != KD_TEXT || 238 fbcon_info_from_console(i) != info) 239 continue; 240 241 p = &fb_display[vc->vc_num]; 242 p->con_rotate = rotate; 243 } 244 245 fbcon_set_all_vcs(info); 246 } 247 #else 248 static inline void fbcon_set_rotation(struct fb_info *info) 249 { 250 struct fbcon_ops *ops = info->fbcon_par; 251 252 ops->rotate = FB_ROTATE_UR; 253 } 254 255 static void fbcon_rotate(struct fb_info *info, u32 rotate) 256 { 257 return; 258 } 259 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 261 { 262 return; 263 } 264 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 265 266 static int fbcon_get_rotate(struct fb_info *info) 267 { 268 struct fbcon_ops *ops = info->fbcon_par; 269 270 return (ops) ? ops->rotate : 0; 271 } 272 273 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 274 { 275 struct fbcon_ops *ops = info->fbcon_par; 276 277 return (info->state != FBINFO_STATE_RUNNING || 278 vc->vc_mode != KD_TEXT || ops->graphics); 279 } 280 281 static int get_color(struct vc_data *vc, struct fb_info *info, 282 u16 c, int is_fg) 283 { 284 int depth = fb_get_color_depth(&info->var, &info->fix); 285 int color = 0; 286 287 if (console_blanked) { 288 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 289 290 c = vc->vc_video_erase_char & charmask; 291 } 292 293 if (depth != 1) 294 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 295 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 296 297 switch (depth) { 298 case 1: 299 { 300 int col = mono_col(info); 301 /* 0 or 1 */ 302 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 303 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 304 305 if (console_blanked) 306 fg = bg; 307 308 color = (is_fg) ? fg : bg; 309 break; 310 } 311 case 2: 312 /* 313 * Scale down 16-colors to 4 colors. Default 4-color palette 314 * is grayscale. However, simply dividing the values by 4 315 * will not work, as colors 1, 2 and 3 will be scaled-down 316 * to zero rendering them invisible. So empirically convert 317 * colors to a sane 4-level grayscale. 318 */ 319 switch (color) { 320 case 0: 321 color = 0; /* black */ 322 break; 323 case 1 ... 6: 324 color = 2; /* white */ 325 break; 326 case 7 ... 8: 327 color = 1; /* gray */ 328 break; 329 default: 330 color = 3; /* intense white */ 331 break; 332 } 333 break; 334 case 3: 335 /* 336 * Last 8 entries of default 16-color palette is a more intense 337 * version of the first 8 (i.e., same chrominance, different 338 * luminance). 339 */ 340 color &= 7; 341 break; 342 } 343 344 345 return color; 346 } 347 348 static void fb_flashcursor(struct work_struct *work) 349 { 350 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 351 struct fb_info *info; 352 struct vc_data *vc = NULL; 353 int c; 354 int mode; 355 int ret; 356 357 /* FIXME: we should sort out the unbind locking instead */ 358 /* instead we just fail to flash the cursor if we can't get 359 * the lock instead of blocking fbcon deinit */ 360 ret = console_trylock(); 361 if (ret == 0) 362 return; 363 364 /* protected by console_lock */ 365 info = ops->info; 366 367 if (ops->currcon != -1) 368 vc = vc_cons[ops->currcon].d; 369 370 if (!vc || !con_is_visible(vc) || 371 fbcon_info_from_console(vc->vc_num) != info || 372 vc->vc_deccm != 1) { 373 console_unlock(); 374 return; 375 } 376 377 c = scr_readw((u16 *) vc->vc_pos); 378 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 379 CM_ERASE : CM_DRAW; 380 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 381 get_color(vc, info, c, 0)); 382 console_unlock(); 383 384 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 385 ops->cur_blink_jiffies); 386 } 387 388 static void fbcon_add_cursor_work(struct fb_info *info) 389 { 390 struct fbcon_ops *ops = info->fbcon_par; 391 392 if (!fbcon_cursor_noblink) 393 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 394 ops->cur_blink_jiffies); 395 } 396 397 static void fbcon_del_cursor_work(struct fb_info *info) 398 { 399 struct fbcon_ops *ops = info->fbcon_par; 400 401 cancel_delayed_work_sync(&ops->cursor_work); 402 } 403 404 #ifndef MODULE 405 static int __init fb_console_setup(char *this_opt) 406 { 407 char *options; 408 int i, j; 409 410 if (!this_opt || !*this_opt) 411 return 1; 412 413 while ((options = strsep(&this_opt, ",")) != NULL) { 414 if (!strncmp(options, "font:", 5)) { 415 strscpy(fontname, options + 5, sizeof(fontname)); 416 continue; 417 } 418 419 if (!strncmp(options, "scrollback:", 11)) { 420 pr_warn("Ignoring scrollback size option\n"); 421 continue; 422 } 423 424 if (!strncmp(options, "map:", 4)) { 425 options += 4; 426 if (*options) { 427 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 428 if (!options[j]) 429 j = 0; 430 con2fb_map_boot[i] = 431 (options[j++]-'0') % FB_MAX; 432 } 433 434 fbcon_map_override(); 435 } 436 continue; 437 } 438 439 if (!strncmp(options, "vc:", 3)) { 440 options += 3; 441 if (*options) 442 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 443 if (first_fb_vc >= MAX_NR_CONSOLES) 444 first_fb_vc = 0; 445 if (*options++ == '-') 446 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 447 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 448 last_fb_vc = MAX_NR_CONSOLES - 1; 449 fbcon_is_default = 0; 450 continue; 451 } 452 453 if (!strncmp(options, "rotate:", 7)) { 454 options += 7; 455 if (*options) 456 initial_rotation = simple_strtoul(options, &options, 0); 457 if (initial_rotation > 3) 458 initial_rotation = 0; 459 continue; 460 } 461 462 if (!strncmp(options, "margin:", 7)) { 463 options += 7; 464 if (*options) 465 margin_color = simple_strtoul(options, &options, 0); 466 continue; 467 } 468 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 469 if (!strcmp(options, "nodefer")) { 470 deferred_takeover = false; 471 continue; 472 } 473 #endif 474 475 if (!strncmp(options, "logo-pos:", 9)) { 476 options += 9; 477 if (!strcmp(options, "center")) 478 fb_center_logo = true; 479 continue; 480 } 481 482 if (!strncmp(options, "logo-count:", 11)) { 483 options += 11; 484 if (*options) 485 fb_logo_count = simple_strtol(options, &options, 0); 486 continue; 487 } 488 } 489 return 1; 490 } 491 492 __setup("fbcon=", fb_console_setup); 493 #endif 494 495 static int search_fb_in_map(int idx) 496 { 497 int i, retval = 0; 498 499 for (i = first_fb_vc; i <= last_fb_vc; i++) { 500 if (con2fb_map[i] == idx) 501 retval = 1; 502 } 503 return retval; 504 } 505 506 static int search_for_mapped_con(void) 507 { 508 int i, retval = 0; 509 510 for (i = first_fb_vc; i <= last_fb_vc; i++) { 511 if (con2fb_map[i] != -1) 512 retval = 1; 513 } 514 return retval; 515 } 516 517 static int do_fbcon_takeover(int show_logo) 518 { 519 int err, i; 520 521 if (!fbcon_num_registered_fb) 522 return -ENODEV; 523 524 if (!show_logo) 525 logo_shown = FBCON_LOGO_DONTSHOW; 526 527 for (i = first_fb_vc; i <= last_fb_vc; i++) 528 con2fb_map[i] = info_idx; 529 530 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 531 fbcon_is_default); 532 533 if (err) { 534 for (i = first_fb_vc; i <= last_fb_vc; i++) 535 con2fb_map[i] = -1; 536 info_idx = -1; 537 } else { 538 fbcon_has_console_bind = 1; 539 } 540 541 return err; 542 } 543 544 #ifdef MODULE 545 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 546 int cols, int rows, int new_cols, int new_rows) 547 { 548 logo_shown = FBCON_LOGO_DONTSHOW; 549 } 550 #else 551 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 552 int cols, int rows, int new_cols, int new_rows) 553 { 554 /* Need to make room for the logo */ 555 struct fbcon_ops *ops = info->fbcon_par; 556 int cnt, erase = vc->vc_video_erase_char, step; 557 unsigned short *save = NULL, *r, *q; 558 int logo_height; 559 560 if (info->fbops->owner) { 561 logo_shown = FBCON_LOGO_DONTSHOW; 562 return; 563 } 564 565 /* 566 * remove underline attribute from erase character 567 * if black and white framebuffer. 568 */ 569 if (fb_get_color_depth(&info->var, &info->fix) == 1) 570 erase &= ~0x400; 571 logo_height = fb_prepare_logo(info, ops->rotate); 572 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 573 q = (unsigned short *) (vc->vc_origin + 574 vc->vc_size_row * rows); 575 step = logo_lines * cols; 576 for (r = q - logo_lines * cols; r < q; r++) 577 if (scr_readw(r) != vc->vc_video_erase_char) 578 break; 579 if (r != q && new_rows >= rows + logo_lines) { 580 save = kzalloc(array3_size(logo_lines, new_cols, 2), 581 GFP_KERNEL); 582 if (save) { 583 int i = min(cols, new_cols); 584 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 585 r = q - step; 586 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 587 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 588 r = q; 589 } 590 } 591 if (r == q) { 592 /* We can scroll screen down */ 593 r = q - step - cols; 594 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 595 scr_memcpyw(r + step, r, vc->vc_size_row); 596 r -= cols; 597 } 598 if (!save) { 599 int lines; 600 if (vc->state.y + logo_lines >= rows) 601 lines = rows - vc->state.y - 1; 602 else 603 lines = logo_lines; 604 vc->state.y += lines; 605 vc->vc_pos += lines * vc->vc_size_row; 606 } 607 } 608 scr_memsetw((unsigned short *) vc->vc_origin, 609 erase, 610 vc->vc_size_row * logo_lines); 611 612 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 613 fbcon_clear_margins(vc, 0); 614 update_screen(vc); 615 } 616 617 if (save) { 618 q = (unsigned short *) (vc->vc_origin + 619 vc->vc_size_row * 620 rows); 621 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 622 vc->state.y += logo_lines; 623 vc->vc_pos += logo_lines * vc->vc_size_row; 624 kfree(save); 625 } 626 627 if (logo_shown == FBCON_LOGO_DONTSHOW) 628 return; 629 630 if (logo_lines > vc->vc_bottom) { 631 logo_shown = FBCON_LOGO_CANSHOW; 632 printk(KERN_INFO 633 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 634 } else { 635 logo_shown = FBCON_LOGO_DRAW; 636 vc->vc_top = logo_lines; 637 } 638 } 639 #endif /* MODULE */ 640 641 #ifdef CONFIG_FB_TILEBLITTING 642 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 643 { 644 struct fbcon_ops *ops = info->fbcon_par; 645 646 ops->p = &fb_display[vc->vc_num]; 647 648 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 649 fbcon_set_tileops(vc, info); 650 else { 651 fbcon_set_rotation(info); 652 fbcon_set_bitops(ops); 653 } 654 } 655 656 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 657 { 658 int err = 0; 659 660 if (info->flags & FBINFO_MISC_TILEBLITTING && 661 info->tileops->fb_get_tilemax(info) < charcount) 662 err = 1; 663 664 return err; 665 } 666 #else 667 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 668 { 669 struct fbcon_ops *ops = info->fbcon_par; 670 671 info->flags &= ~FBINFO_MISC_TILEBLITTING; 672 ops->p = &fb_display[vc->vc_num]; 673 fbcon_set_rotation(info); 674 fbcon_set_bitops(ops); 675 } 676 677 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 678 { 679 return 0; 680 } 681 682 #endif /* CONFIG_MISC_TILEBLITTING */ 683 684 static void fbcon_release(struct fb_info *info) 685 { 686 lock_fb_info(info); 687 if (info->fbops->fb_release) 688 info->fbops->fb_release(info, 0); 689 unlock_fb_info(info); 690 691 module_put(info->fbops->owner); 692 693 if (info->fbcon_par) { 694 struct fbcon_ops *ops = info->fbcon_par; 695 696 fbcon_del_cursor_work(info); 697 kfree(ops->cursor_state.mask); 698 kfree(ops->cursor_data); 699 kfree(ops->cursor_src); 700 kfree(ops->fontbuffer); 701 kfree(info->fbcon_par); 702 info->fbcon_par = NULL; 703 } 704 } 705 706 static int fbcon_open(struct fb_info *info) 707 { 708 struct fbcon_ops *ops; 709 710 if (!try_module_get(info->fbops->owner)) 711 return -ENODEV; 712 713 lock_fb_info(info); 714 if (info->fbops->fb_open && 715 info->fbops->fb_open(info, 0)) { 716 unlock_fb_info(info); 717 module_put(info->fbops->owner); 718 return -ENODEV; 719 } 720 unlock_fb_info(info); 721 722 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 723 if (!ops) { 724 fbcon_release(info); 725 return -ENOMEM; 726 } 727 728 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 729 ops->info = info; 730 info->fbcon_par = ops; 731 ops->cur_blink_jiffies = HZ / 5; 732 733 return 0; 734 } 735 736 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 737 int unit) 738 { 739 int err; 740 741 err = fbcon_open(info); 742 if (err) 743 return err; 744 745 if (vc) 746 set_blitting_type(vc, info); 747 748 return err; 749 } 750 751 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 752 struct fb_info *newinfo) 753 { 754 int ret; 755 756 fbcon_release(oldinfo); 757 758 /* 759 If oldinfo and newinfo are driving the same hardware, 760 the fb_release() method of oldinfo may attempt to 761 restore the hardware state. This will leave the 762 newinfo in an undefined state. Thus, a call to 763 fb_set_par() may be needed for the newinfo. 764 */ 765 if (newinfo && newinfo->fbops->fb_set_par) { 766 ret = newinfo->fbops->fb_set_par(newinfo); 767 768 if (ret) 769 printk(KERN_ERR "con2fb_release_oldinfo: " 770 "detected unhandled fb_set_par error, " 771 "error code %d\n", ret); 772 } 773 } 774 775 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 776 int unit, int show_logo) 777 { 778 struct fbcon_ops *ops = info->fbcon_par; 779 int ret; 780 781 ops->currcon = fg_console; 782 783 if (info->fbops->fb_set_par && !ops->initialized) { 784 ret = info->fbops->fb_set_par(info); 785 786 if (ret) 787 printk(KERN_ERR "con2fb_init_display: detected " 788 "unhandled fb_set_par error, " 789 "error code %d\n", ret); 790 } 791 792 ops->initialized = true; 793 ops->graphics = 0; 794 fbcon_set_disp(info, &info->var, unit); 795 796 if (show_logo) { 797 struct vc_data *fg_vc = vc_cons[fg_console].d; 798 struct fb_info *fg_info = 799 fbcon_info_from_console(fg_console); 800 801 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 802 fg_vc->vc_rows, fg_vc->vc_cols, 803 fg_vc->vc_rows); 804 } 805 806 update_screen(vc_cons[fg_console].d); 807 } 808 809 /** 810 * set_con2fb_map - map console to frame buffer device 811 * @unit: virtual console number to map 812 * @newidx: frame buffer index to map virtual console to 813 * @user: user request 814 * 815 * Maps a virtual console @unit to a frame buffer device 816 * @newidx. 817 * 818 * This should be called with the console lock held. 819 */ 820 static int set_con2fb_map(int unit, int newidx, int user) 821 { 822 struct vc_data *vc = vc_cons[unit].d; 823 int oldidx = con2fb_map[unit]; 824 struct fb_info *info = fbcon_registered_fb[newidx]; 825 struct fb_info *oldinfo = NULL; 826 int found, err = 0, show_logo; 827 828 WARN_CONSOLE_UNLOCKED(); 829 830 if (oldidx == newidx) 831 return 0; 832 833 if (!info) 834 return -EINVAL; 835 836 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 837 info_idx = newidx; 838 return do_fbcon_takeover(0); 839 } 840 841 if (oldidx != -1) 842 oldinfo = fbcon_registered_fb[oldidx]; 843 844 found = search_fb_in_map(newidx); 845 846 if (!err && !found) { 847 err = con2fb_acquire_newinfo(vc, info, unit); 848 if (!err) 849 con2fb_map[unit] = newidx; 850 } 851 852 /* 853 * If old fb is not mapped to any of the consoles, 854 * fbcon should release it. 855 */ 856 if (!err && oldinfo && !search_fb_in_map(oldidx)) 857 con2fb_release_oldinfo(vc, oldinfo, info); 858 859 show_logo = (fg_console == 0 && !user && 860 logo_shown != FBCON_LOGO_DONTSHOW); 861 862 if (!found) 863 fbcon_add_cursor_work(info); 864 con2fb_map_boot[unit] = newidx; 865 con2fb_init_display(vc, info, unit, show_logo); 866 867 if (!search_fb_in_map(info_idx)) 868 info_idx = newidx; 869 870 return err; 871 } 872 873 /* 874 * Low Level Operations 875 */ 876 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 877 static int var_to_display(struct fbcon_display *disp, 878 struct fb_var_screeninfo *var, 879 struct fb_info *info) 880 { 881 disp->xres_virtual = var->xres_virtual; 882 disp->yres_virtual = var->yres_virtual; 883 disp->bits_per_pixel = var->bits_per_pixel; 884 disp->grayscale = var->grayscale; 885 disp->nonstd = var->nonstd; 886 disp->accel_flags = var->accel_flags; 887 disp->height = var->height; 888 disp->width = var->width; 889 disp->red = var->red; 890 disp->green = var->green; 891 disp->blue = var->blue; 892 disp->transp = var->transp; 893 disp->rotate = var->rotate; 894 disp->mode = fb_match_mode(var, &info->modelist); 895 if (disp->mode == NULL) 896 /* This should not happen */ 897 return -EINVAL; 898 return 0; 899 } 900 901 static void display_to_var(struct fb_var_screeninfo *var, 902 struct fbcon_display *disp) 903 { 904 fb_videomode_to_var(var, disp->mode); 905 var->xres_virtual = disp->xres_virtual; 906 var->yres_virtual = disp->yres_virtual; 907 var->bits_per_pixel = disp->bits_per_pixel; 908 var->grayscale = disp->grayscale; 909 var->nonstd = disp->nonstd; 910 var->accel_flags = disp->accel_flags; 911 var->height = disp->height; 912 var->width = disp->width; 913 var->red = disp->red; 914 var->green = disp->green; 915 var->blue = disp->blue; 916 var->transp = disp->transp; 917 var->rotate = disp->rotate; 918 } 919 920 static const char *fbcon_startup(void) 921 { 922 const char *display_desc = "frame buffer device"; 923 struct fbcon_display *p = &fb_display[fg_console]; 924 struct vc_data *vc = vc_cons[fg_console].d; 925 const struct font_desc *font = NULL; 926 struct fb_info *info = NULL; 927 struct fbcon_ops *ops; 928 int rows, cols; 929 930 /* 931 * If num_registered_fb is zero, this is a call for the dummy part. 932 * The frame buffer devices weren't initialized yet. 933 */ 934 if (!fbcon_num_registered_fb || info_idx == -1) 935 return display_desc; 936 /* 937 * Instead of blindly using registered_fb[0], we use info_idx, set by 938 * fbcon_fb_registered(); 939 */ 940 info = fbcon_registered_fb[info_idx]; 941 if (!info) 942 return NULL; 943 944 if (fbcon_open(info)) 945 return NULL; 946 947 ops = info->fbcon_par; 948 ops->currcon = -1; 949 ops->graphics = 1; 950 ops->cur_rotate = -1; 951 952 p->con_rotate = initial_rotation; 953 if (p->con_rotate == -1) 954 p->con_rotate = info->fbcon_rotate_hint; 955 if (p->con_rotate == -1) 956 p->con_rotate = FB_ROTATE_UR; 957 958 set_blitting_type(vc, info); 959 960 /* Setup default font */ 961 if (!p->fontdata && !vc->vc_font.data) { 962 if (!fontname[0] || !(font = find_font(fontname))) 963 font = get_default_font(info->var.xres, 964 info->var.yres, 965 info->pixmap.blit_x, 966 info->pixmap.blit_y); 967 vc->vc_font.width = font->width; 968 vc->vc_font.height = font->height; 969 vc->vc_font.data = (void *)(p->fontdata = font->data); 970 vc->vc_font.charcount = font->charcount; 971 } else { 972 p->fontdata = vc->vc_font.data; 973 } 974 975 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 976 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 977 cols /= vc->vc_font.width; 978 rows /= vc->vc_font.height; 979 vc_resize(vc, cols, rows); 980 981 pr_debug("mode: %s\n", info->fix.id); 982 pr_debug("visual: %d\n", info->fix.visual); 983 pr_debug("res: %dx%d-%d\n", info->var.xres, 984 info->var.yres, 985 info->var.bits_per_pixel); 986 987 fbcon_add_cursor_work(info); 988 return display_desc; 989 } 990 991 static void fbcon_init(struct vc_data *vc, int init) 992 { 993 struct fb_info *info; 994 struct fbcon_ops *ops; 995 struct vc_data **default_mode = vc->vc_display_fg; 996 struct vc_data *svc = *default_mode; 997 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 998 int logo = 1, new_rows, new_cols, rows, cols; 999 int ret; 1000 1001 if (WARN_ON(info_idx == -1)) 1002 return; 1003 1004 if (con2fb_map[vc->vc_num] == -1) 1005 con2fb_map[vc->vc_num] = info_idx; 1006 1007 info = fbcon_info_from_console(vc->vc_num); 1008 1009 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1010 logo_shown = FBCON_LOGO_DONTSHOW; 1011 1012 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1013 (info->fix.type == FB_TYPE_TEXT)) 1014 logo = 0; 1015 1016 if (var_to_display(p, &info->var, info)) 1017 return; 1018 1019 if (!info->fbcon_par) 1020 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1021 1022 /* If we are not the first console on this 1023 fb, copy the font from that console */ 1024 t = &fb_display[fg_console]; 1025 if (!p->fontdata) { 1026 if (t->fontdata) { 1027 struct vc_data *fvc = vc_cons[fg_console].d; 1028 1029 vc->vc_font.data = (void *)(p->fontdata = 1030 fvc->vc_font.data); 1031 vc->vc_font.width = fvc->vc_font.width; 1032 vc->vc_font.height = fvc->vc_font.height; 1033 vc->vc_font.charcount = fvc->vc_font.charcount; 1034 p->userfont = t->userfont; 1035 1036 if (p->userfont) 1037 REFCOUNT(p->fontdata)++; 1038 } else { 1039 const struct font_desc *font = NULL; 1040 1041 if (!fontname[0] || !(font = find_font(fontname))) 1042 font = get_default_font(info->var.xres, 1043 info->var.yres, 1044 info->pixmap.blit_x, 1045 info->pixmap.blit_y); 1046 vc->vc_font.width = font->width; 1047 vc->vc_font.height = font->height; 1048 vc->vc_font.data = (void *)(p->fontdata = font->data); 1049 vc->vc_font.charcount = font->charcount; 1050 } 1051 } 1052 1053 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1054 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1055 if (vc->vc_font.charcount == 256) { 1056 vc->vc_hi_font_mask = 0; 1057 } else { 1058 vc->vc_hi_font_mask = 0x100; 1059 if (vc->vc_can_do_color) 1060 vc->vc_complement_mask <<= 1; 1061 } 1062 1063 if (!*svc->uni_pagedict_loc) 1064 con_set_default_unimap(svc); 1065 if (!*vc->uni_pagedict_loc) 1066 con_copy_unimap(vc, svc); 1067 1068 ops = info->fbcon_par; 1069 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1070 1071 p->con_rotate = initial_rotation; 1072 if (p->con_rotate == -1) 1073 p->con_rotate = info->fbcon_rotate_hint; 1074 if (p->con_rotate == -1) 1075 p->con_rotate = FB_ROTATE_UR; 1076 1077 set_blitting_type(vc, info); 1078 1079 cols = vc->vc_cols; 1080 rows = vc->vc_rows; 1081 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1082 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1083 new_cols /= vc->vc_font.width; 1084 new_rows /= vc->vc_font.height; 1085 1086 /* 1087 * We must always set the mode. The mode of the previous console 1088 * driver could be in the same resolution but we are using different 1089 * hardware so we have to initialize the hardware. 1090 * 1091 * We need to do it in fbcon_init() to prevent screen corruption. 1092 */ 1093 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1094 if (info->fbops->fb_set_par && !ops->initialized) { 1095 ret = info->fbops->fb_set_par(info); 1096 1097 if (ret) 1098 printk(KERN_ERR "fbcon_init: detected " 1099 "unhandled fb_set_par error, " 1100 "error code %d\n", ret); 1101 } 1102 1103 ops->initialized = true; 1104 } 1105 1106 ops->graphics = 0; 1107 1108 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1109 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1110 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1111 p->scrollmode = SCROLL_MOVE; 1112 else /* default to something safe */ 1113 p->scrollmode = SCROLL_REDRAW; 1114 #endif 1115 1116 /* 1117 * ++guenther: console.c:vc_allocate() relies on initializing 1118 * vc_{cols,rows}, but we must not set those if we are only 1119 * resizing the console. 1120 */ 1121 if (init) { 1122 vc->vc_cols = new_cols; 1123 vc->vc_rows = new_rows; 1124 } else 1125 vc_resize(vc, new_cols, new_rows); 1126 1127 if (logo) 1128 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1129 1130 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1131 ops->rotate = FB_ROTATE_UR; 1132 set_blitting_type(vc, info); 1133 } 1134 1135 ops->p = &fb_display[fg_console]; 1136 } 1137 1138 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1139 { 1140 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1141 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1142 p->fontdata = NULL; 1143 p->userfont = 0; 1144 } 1145 1146 static void set_vc_hi_font(struct vc_data *vc, bool set); 1147 1148 static void fbcon_release_all(void) 1149 { 1150 struct fb_info *info; 1151 int i, j, mapped; 1152 1153 fbcon_for_each_registered_fb(i) { 1154 mapped = 0; 1155 info = fbcon_registered_fb[i]; 1156 1157 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1158 if (con2fb_map[j] == i) { 1159 mapped = 1; 1160 con2fb_map[j] = -1; 1161 } 1162 } 1163 1164 if (mapped) 1165 fbcon_release(info); 1166 } 1167 } 1168 1169 static void fbcon_deinit(struct vc_data *vc) 1170 { 1171 struct fbcon_display *p = &fb_display[vc->vc_num]; 1172 struct fb_info *info; 1173 struct fbcon_ops *ops; 1174 int idx; 1175 bool free_font = true; 1176 1177 idx = con2fb_map[vc->vc_num]; 1178 1179 if (idx == -1) 1180 goto finished; 1181 1182 info = fbcon_registered_fb[idx]; 1183 1184 if (!info) 1185 goto finished; 1186 1187 if (info->flags & FBINFO_MISC_FIRMWARE) 1188 free_font = false; 1189 ops = info->fbcon_par; 1190 1191 if (!ops) 1192 goto finished; 1193 1194 if (con_is_visible(vc)) 1195 fbcon_del_cursor_work(info); 1196 1197 ops->initialized = false; 1198 finished: 1199 1200 fbcon_free_font(p, free_font); 1201 if (free_font) 1202 vc->vc_font.data = NULL; 1203 1204 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1205 set_vc_hi_font(vc, false); 1206 1207 if (!con_is_bound(&fb_con)) 1208 fbcon_release_all(); 1209 1210 if (vc->vc_num == logo_shown) 1211 logo_shown = FBCON_LOGO_CANSHOW; 1212 1213 return; 1214 } 1215 1216 /* ====================================================================== */ 1217 1218 /* fbcon_XXX routines - interface used by the world 1219 * 1220 * This system is now divided into two levels because of complications 1221 * caused by hardware scrolling. Top level functions: 1222 * 1223 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1224 * 1225 * handles y values in range [0, scr_height-1] that correspond to real 1226 * screen positions. y_wrap shift means that first line of bitmap may be 1227 * anywhere on this display. These functions convert lineoffsets to 1228 * bitmap offsets and deal with the wrap-around case by splitting blits. 1229 * 1230 * fbcon_bmove_physical_8() -- These functions fast implementations 1231 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1232 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1233 * 1234 * WARNING: 1235 * 1236 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1237 * Implies should only really hardware scroll in rows. Only reason for 1238 * restriction is simplicity & efficiency at the moment. 1239 */ 1240 1241 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1242 int width) 1243 { 1244 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1245 struct fbcon_ops *ops = info->fbcon_par; 1246 1247 struct fbcon_display *p = &fb_display[vc->vc_num]; 1248 u_int y_break; 1249 1250 if (fbcon_is_inactive(vc, info)) 1251 return; 1252 1253 if (!height || !width) 1254 return; 1255 1256 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1257 vc->vc_top = 0; 1258 /* 1259 * If the font dimensions are not an integral of the display 1260 * dimensions then the ops->clear below won't end up clearing 1261 * the margins. Call clear_margins here in case the logo 1262 * bitmap stretched into the margin area. 1263 */ 1264 fbcon_clear_margins(vc, 0); 1265 } 1266 1267 /* Split blits that cross physical y_wrap boundary */ 1268 1269 y_break = p->vrows - p->yscroll; 1270 if (sy < y_break && sy + height - 1 >= y_break) { 1271 u_int b = y_break - sy; 1272 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1273 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1274 width); 1275 } else 1276 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1277 } 1278 1279 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1280 int count, int ypos, int xpos) 1281 { 1282 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1283 struct fbcon_display *p = &fb_display[vc->vc_num]; 1284 struct fbcon_ops *ops = info->fbcon_par; 1285 1286 if (!fbcon_is_inactive(vc, info)) 1287 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1288 get_color(vc, info, scr_readw(s), 1), 1289 get_color(vc, info, scr_readw(s), 0)); 1290 } 1291 1292 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1293 { 1294 unsigned short chr; 1295 1296 scr_writew(c, &chr); 1297 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1298 } 1299 1300 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1301 { 1302 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1303 struct fbcon_ops *ops = info->fbcon_par; 1304 1305 if (!fbcon_is_inactive(vc, info)) 1306 ops->clear_margins(vc, info, margin_color, bottom_only); 1307 } 1308 1309 static void fbcon_cursor(struct vc_data *vc, int mode) 1310 { 1311 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1312 struct fbcon_ops *ops = info->fbcon_par; 1313 int c = scr_readw((u16 *) vc->vc_pos); 1314 1315 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1316 1317 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1318 return; 1319 1320 if (vc->vc_cursor_type & CUR_SW) 1321 fbcon_del_cursor_work(info); 1322 else 1323 fbcon_add_cursor_work(info); 1324 1325 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1326 1327 if (!ops->cursor) 1328 return; 1329 1330 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1331 get_color(vc, info, c, 0)); 1332 } 1333 1334 static int scrollback_phys_max = 0; 1335 static int scrollback_max = 0; 1336 static int scrollback_current = 0; 1337 1338 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1339 int unit) 1340 { 1341 struct fbcon_display *p, *t; 1342 struct vc_data **default_mode, *vc; 1343 struct vc_data *svc; 1344 struct fbcon_ops *ops = info->fbcon_par; 1345 int rows, cols; 1346 1347 p = &fb_display[unit]; 1348 1349 if (var_to_display(p, var, info)) 1350 return; 1351 1352 vc = vc_cons[unit].d; 1353 1354 if (!vc) 1355 return; 1356 1357 default_mode = vc->vc_display_fg; 1358 svc = *default_mode; 1359 t = &fb_display[svc->vc_num]; 1360 1361 if (!vc->vc_font.data) { 1362 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1363 vc->vc_font.width = (*default_mode)->vc_font.width; 1364 vc->vc_font.height = (*default_mode)->vc_font.height; 1365 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1366 p->userfont = t->userfont; 1367 if (p->userfont) 1368 REFCOUNT(p->fontdata)++; 1369 } 1370 1371 var->activate = FB_ACTIVATE_NOW; 1372 info->var.activate = var->activate; 1373 var->yoffset = info->var.yoffset; 1374 var->xoffset = info->var.xoffset; 1375 fb_set_var(info, var); 1376 ops->var = info->var; 1377 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1378 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1379 if (vc->vc_font.charcount == 256) { 1380 vc->vc_hi_font_mask = 0; 1381 } else { 1382 vc->vc_hi_font_mask = 0x100; 1383 if (vc->vc_can_do_color) 1384 vc->vc_complement_mask <<= 1; 1385 } 1386 1387 if (!*svc->uni_pagedict_loc) 1388 con_set_default_unimap(svc); 1389 if (!*vc->uni_pagedict_loc) 1390 con_copy_unimap(vc, svc); 1391 1392 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1393 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1394 cols /= vc->vc_font.width; 1395 rows /= vc->vc_font.height; 1396 vc_resize(vc, cols, rows); 1397 1398 if (con_is_visible(vc)) { 1399 update_screen(vc); 1400 } 1401 } 1402 1403 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1404 { 1405 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1406 struct fbcon_ops *ops = info->fbcon_par; 1407 struct fbcon_display *p = &fb_display[vc->vc_num]; 1408 1409 p->yscroll += count; 1410 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1411 p->yscroll -= p->vrows; 1412 ops->var.xoffset = 0; 1413 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1414 ops->var.vmode |= FB_VMODE_YWRAP; 1415 ops->update_start(info); 1416 scrollback_max += count; 1417 if (scrollback_max > scrollback_phys_max) 1418 scrollback_max = scrollback_phys_max; 1419 scrollback_current = 0; 1420 } 1421 1422 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1423 { 1424 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1425 struct fbcon_ops *ops = info->fbcon_par; 1426 struct fbcon_display *p = &fb_display[vc->vc_num]; 1427 1428 p->yscroll -= count; 1429 if (p->yscroll < 0) /* Deal with wrap */ 1430 p->yscroll += p->vrows; 1431 ops->var.xoffset = 0; 1432 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1433 ops->var.vmode |= FB_VMODE_YWRAP; 1434 ops->update_start(info); 1435 scrollback_max -= count; 1436 if (scrollback_max < 0) 1437 scrollback_max = 0; 1438 scrollback_current = 0; 1439 } 1440 1441 static __inline__ void ypan_up(struct vc_data *vc, int count) 1442 { 1443 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1444 struct fbcon_display *p = &fb_display[vc->vc_num]; 1445 struct fbcon_ops *ops = info->fbcon_par; 1446 1447 p->yscroll += count; 1448 if (p->yscroll > p->vrows - vc->vc_rows) { 1449 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1450 0, 0, 0, vc->vc_rows, vc->vc_cols); 1451 p->yscroll -= p->vrows - vc->vc_rows; 1452 } 1453 1454 ops->var.xoffset = 0; 1455 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1456 ops->var.vmode &= ~FB_VMODE_YWRAP; 1457 ops->update_start(info); 1458 fbcon_clear_margins(vc, 1); 1459 scrollback_max += count; 1460 if (scrollback_max > scrollback_phys_max) 1461 scrollback_max = scrollback_phys_max; 1462 scrollback_current = 0; 1463 } 1464 1465 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1466 { 1467 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1468 struct fbcon_ops *ops = info->fbcon_par; 1469 struct fbcon_display *p = &fb_display[vc->vc_num]; 1470 1471 p->yscroll += count; 1472 1473 if (p->yscroll > p->vrows - vc->vc_rows) { 1474 p->yscroll -= p->vrows - vc->vc_rows; 1475 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1476 } 1477 1478 ops->var.xoffset = 0; 1479 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1480 ops->var.vmode &= ~FB_VMODE_YWRAP; 1481 ops->update_start(info); 1482 fbcon_clear_margins(vc, 1); 1483 scrollback_max += count; 1484 if (scrollback_max > scrollback_phys_max) 1485 scrollback_max = scrollback_phys_max; 1486 scrollback_current = 0; 1487 } 1488 1489 static __inline__ void ypan_down(struct vc_data *vc, int count) 1490 { 1491 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1492 struct fbcon_display *p = &fb_display[vc->vc_num]; 1493 struct fbcon_ops *ops = info->fbcon_par; 1494 1495 p->yscroll -= count; 1496 if (p->yscroll < 0) { 1497 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1498 0, vc->vc_rows, vc->vc_cols); 1499 p->yscroll += p->vrows - vc->vc_rows; 1500 } 1501 1502 ops->var.xoffset = 0; 1503 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1504 ops->var.vmode &= ~FB_VMODE_YWRAP; 1505 ops->update_start(info); 1506 fbcon_clear_margins(vc, 1); 1507 scrollback_max -= count; 1508 if (scrollback_max < 0) 1509 scrollback_max = 0; 1510 scrollback_current = 0; 1511 } 1512 1513 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1514 { 1515 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1516 struct fbcon_ops *ops = info->fbcon_par; 1517 struct fbcon_display *p = &fb_display[vc->vc_num]; 1518 1519 p->yscroll -= count; 1520 1521 if (p->yscroll < 0) { 1522 p->yscroll += p->vrows - vc->vc_rows; 1523 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1524 } 1525 1526 ops->var.xoffset = 0; 1527 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1528 ops->var.vmode &= ~FB_VMODE_YWRAP; 1529 ops->update_start(info); 1530 fbcon_clear_margins(vc, 1); 1531 scrollback_max -= count; 1532 if (scrollback_max < 0) 1533 scrollback_max = 0; 1534 scrollback_current = 0; 1535 } 1536 1537 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1538 int line, int count, int dy) 1539 { 1540 unsigned short *s = (unsigned short *) 1541 (vc->vc_origin + vc->vc_size_row * line); 1542 1543 while (count--) { 1544 unsigned short *start = s; 1545 unsigned short *le = advance_row(s, 1); 1546 unsigned short c; 1547 int x = 0; 1548 unsigned short attr = 1; 1549 1550 do { 1551 c = scr_readw(s); 1552 if (attr != (c & 0xff00)) { 1553 attr = c & 0xff00; 1554 if (s > start) { 1555 fbcon_putcs(vc, start, s - start, 1556 dy, x); 1557 x += s - start; 1558 start = s; 1559 } 1560 } 1561 console_conditional_schedule(); 1562 s++; 1563 } while (s < le); 1564 if (s > start) 1565 fbcon_putcs(vc, start, s - start, dy, x); 1566 console_conditional_schedule(); 1567 dy++; 1568 } 1569 } 1570 1571 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1572 struct fbcon_display *p, int line, int count, int ycount) 1573 { 1574 int offset = ycount * vc->vc_cols; 1575 unsigned short *d = (unsigned short *) 1576 (vc->vc_origin + vc->vc_size_row * line); 1577 unsigned short *s = d + offset; 1578 struct fbcon_ops *ops = info->fbcon_par; 1579 1580 while (count--) { 1581 unsigned short *start = s; 1582 unsigned short *le = advance_row(s, 1); 1583 unsigned short c; 1584 int x = 0; 1585 1586 do { 1587 c = scr_readw(s); 1588 1589 if (c == scr_readw(d)) { 1590 if (s > start) { 1591 ops->bmove(vc, info, line + ycount, x, 1592 line, x, 1, s-start); 1593 x += s - start + 1; 1594 start = s + 1; 1595 } else { 1596 x++; 1597 start++; 1598 } 1599 } 1600 1601 scr_writew(c, d); 1602 console_conditional_schedule(); 1603 s++; 1604 d++; 1605 } while (s < le); 1606 if (s > start) 1607 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1608 s-start); 1609 console_conditional_schedule(); 1610 if (ycount > 0) 1611 line++; 1612 else { 1613 line--; 1614 /* NOTE: We subtract two lines from these pointers */ 1615 s -= vc->vc_size_row; 1616 d -= vc->vc_size_row; 1617 } 1618 } 1619 } 1620 1621 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1622 int line, int count, int offset) 1623 { 1624 unsigned short *d = (unsigned short *) 1625 (vc->vc_origin + vc->vc_size_row * line); 1626 unsigned short *s = d + offset; 1627 1628 while (count--) { 1629 unsigned short *start = s; 1630 unsigned short *le = advance_row(s, 1); 1631 unsigned short c; 1632 int x = 0; 1633 unsigned short attr = 1; 1634 1635 do { 1636 c = scr_readw(s); 1637 if (attr != (c & 0xff00)) { 1638 attr = c & 0xff00; 1639 if (s > start) { 1640 fbcon_putcs(vc, start, s - start, 1641 line, x); 1642 x += s - start; 1643 start = s; 1644 } 1645 } 1646 if (c == scr_readw(d)) { 1647 if (s > start) { 1648 fbcon_putcs(vc, start, s - start, 1649 line, x); 1650 x += s - start + 1; 1651 start = s + 1; 1652 } else { 1653 x++; 1654 start++; 1655 } 1656 } 1657 scr_writew(c, d); 1658 console_conditional_schedule(); 1659 s++; 1660 d++; 1661 } while (s < le); 1662 if (s > start) 1663 fbcon_putcs(vc, start, s - start, line, x); 1664 console_conditional_schedule(); 1665 if (offset > 0) 1666 line++; 1667 else { 1668 line--; 1669 /* NOTE: We subtract two lines from these pointers */ 1670 s -= vc->vc_size_row; 1671 d -= vc->vc_size_row; 1672 } 1673 } 1674 } 1675 1676 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1677 int dy, int dx, int height, int width, u_int y_break) 1678 { 1679 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1680 struct fbcon_ops *ops = info->fbcon_par; 1681 u_int b; 1682 1683 if (sy < y_break && sy + height > y_break) { 1684 b = y_break - sy; 1685 if (dy < sy) { /* Avoid trashing self */ 1686 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1687 y_break); 1688 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1689 height - b, width, y_break); 1690 } else { 1691 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1692 height - b, width, y_break); 1693 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1694 y_break); 1695 } 1696 return; 1697 } 1698 1699 if (dy < y_break && dy + height > y_break) { 1700 b = y_break - dy; 1701 if (dy < sy) { /* Avoid trashing self */ 1702 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1703 y_break); 1704 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1705 height - b, width, y_break); 1706 } else { 1707 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1708 height - b, width, y_break); 1709 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1710 y_break); 1711 } 1712 return; 1713 } 1714 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1715 height, width); 1716 } 1717 1718 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1719 int height, int width) 1720 { 1721 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1722 struct fbcon_display *p = &fb_display[vc->vc_num]; 1723 1724 if (fbcon_is_inactive(vc, info)) 1725 return; 1726 1727 if (!width || !height) 1728 return; 1729 1730 /* Split blits that cross physical y_wrap case. 1731 * Pathological case involves 4 blits, better to use recursive 1732 * code rather than unrolled case 1733 * 1734 * Recursive invocations don't need to erase the cursor over and 1735 * over again, so we use fbcon_bmove_rec() 1736 */ 1737 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1738 p->vrows - p->yscroll); 1739 } 1740 1741 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1742 enum con_scroll dir, unsigned int count) 1743 { 1744 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1745 struct fbcon_display *p = &fb_display[vc->vc_num]; 1746 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1747 1748 if (fbcon_is_inactive(vc, info)) 1749 return true; 1750 1751 fbcon_cursor(vc, CM_ERASE); 1752 1753 /* 1754 * ++Geert: Only use ywrap/ypan if the console is in text mode 1755 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1756 * whole screen (prevents flicker). 1757 */ 1758 1759 switch (dir) { 1760 case SM_UP: 1761 if (count > vc->vc_rows) /* Maximum realistic size */ 1762 count = vc->vc_rows; 1763 switch (fb_scrollmode(p)) { 1764 case SCROLL_MOVE: 1765 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1766 count); 1767 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1768 scr_memsetw((unsigned short *) (vc->vc_origin + 1769 vc->vc_size_row * 1770 (b - count)), 1771 vc->vc_video_erase_char, 1772 vc->vc_size_row * count); 1773 return true; 1774 1775 case SCROLL_WRAP_MOVE: 1776 if (b - t - count > 3 * vc->vc_rows >> 2) { 1777 if (t > 0) 1778 fbcon_bmove(vc, 0, 0, count, 0, t, 1779 vc->vc_cols); 1780 ywrap_up(vc, count); 1781 if (vc->vc_rows - b > 0) 1782 fbcon_bmove(vc, b - count, 0, b, 0, 1783 vc->vc_rows - b, 1784 vc->vc_cols); 1785 } else if (info->flags & FBINFO_READS_FAST) 1786 fbcon_bmove(vc, t + count, 0, t, 0, 1787 b - t - count, vc->vc_cols); 1788 else 1789 goto redraw_up; 1790 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1791 break; 1792 1793 case SCROLL_PAN_REDRAW: 1794 if ((p->yscroll + count <= 1795 2 * (p->vrows - vc->vc_rows)) 1796 && ((!scroll_partial && (b - t == vc->vc_rows)) 1797 || (scroll_partial 1798 && (b - t - count > 1799 3 * vc->vc_rows >> 2)))) { 1800 if (t > 0) 1801 fbcon_redraw_move(vc, p, 0, t, count); 1802 ypan_up_redraw(vc, t, count); 1803 if (vc->vc_rows - b > 0) 1804 fbcon_redraw_move(vc, p, b, 1805 vc->vc_rows - b, b); 1806 } else 1807 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1808 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1809 break; 1810 1811 case SCROLL_PAN_MOVE: 1812 if ((p->yscroll + count <= 1813 2 * (p->vrows - vc->vc_rows)) 1814 && ((!scroll_partial && (b - t == vc->vc_rows)) 1815 || (scroll_partial 1816 && (b - t - count > 1817 3 * vc->vc_rows >> 2)))) { 1818 if (t > 0) 1819 fbcon_bmove(vc, 0, 0, count, 0, t, 1820 vc->vc_cols); 1821 ypan_up(vc, count); 1822 if (vc->vc_rows - b > 0) 1823 fbcon_bmove(vc, b - count, 0, b, 0, 1824 vc->vc_rows - b, 1825 vc->vc_cols); 1826 } else if (info->flags & FBINFO_READS_FAST) 1827 fbcon_bmove(vc, t + count, 0, t, 0, 1828 b - t - count, vc->vc_cols); 1829 else 1830 goto redraw_up; 1831 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1832 break; 1833 1834 case SCROLL_REDRAW: 1835 redraw_up: 1836 fbcon_redraw(vc, p, t, b - t - count, 1837 count * vc->vc_cols); 1838 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1839 scr_memsetw((unsigned short *) (vc->vc_origin + 1840 vc->vc_size_row * 1841 (b - count)), 1842 vc->vc_video_erase_char, 1843 vc->vc_size_row * count); 1844 return true; 1845 } 1846 break; 1847 1848 case SM_DOWN: 1849 if (count > vc->vc_rows) /* Maximum realistic size */ 1850 count = vc->vc_rows; 1851 switch (fb_scrollmode(p)) { 1852 case SCROLL_MOVE: 1853 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1854 -count); 1855 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1856 scr_memsetw((unsigned short *) (vc->vc_origin + 1857 vc->vc_size_row * 1858 t), 1859 vc->vc_video_erase_char, 1860 vc->vc_size_row * count); 1861 return true; 1862 1863 case SCROLL_WRAP_MOVE: 1864 if (b - t - count > 3 * vc->vc_rows >> 2) { 1865 if (vc->vc_rows - b > 0) 1866 fbcon_bmove(vc, b, 0, b - count, 0, 1867 vc->vc_rows - b, 1868 vc->vc_cols); 1869 ywrap_down(vc, count); 1870 if (t > 0) 1871 fbcon_bmove(vc, count, 0, 0, 0, t, 1872 vc->vc_cols); 1873 } else if (info->flags & FBINFO_READS_FAST) 1874 fbcon_bmove(vc, t, 0, t + count, 0, 1875 b - t - count, vc->vc_cols); 1876 else 1877 goto redraw_down; 1878 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1879 break; 1880 1881 case SCROLL_PAN_MOVE: 1882 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1883 && ((!scroll_partial && (b - t == vc->vc_rows)) 1884 || (scroll_partial 1885 && (b - t - count > 1886 3 * vc->vc_rows >> 2)))) { 1887 if (vc->vc_rows - b > 0) 1888 fbcon_bmove(vc, b, 0, b - count, 0, 1889 vc->vc_rows - b, 1890 vc->vc_cols); 1891 ypan_down(vc, count); 1892 if (t > 0) 1893 fbcon_bmove(vc, count, 0, 0, 0, t, 1894 vc->vc_cols); 1895 } else if (info->flags & FBINFO_READS_FAST) 1896 fbcon_bmove(vc, t, 0, t + count, 0, 1897 b - t - count, vc->vc_cols); 1898 else 1899 goto redraw_down; 1900 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1901 break; 1902 1903 case SCROLL_PAN_REDRAW: 1904 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1905 && ((!scroll_partial && (b - t == vc->vc_rows)) 1906 || (scroll_partial 1907 && (b - t - count > 1908 3 * vc->vc_rows >> 2)))) { 1909 if (vc->vc_rows - b > 0) 1910 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1911 b - count); 1912 ypan_down_redraw(vc, t, count); 1913 if (t > 0) 1914 fbcon_redraw_move(vc, p, count, t, 0); 1915 } else 1916 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1917 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1918 break; 1919 1920 case SCROLL_REDRAW: 1921 redraw_down: 1922 fbcon_redraw(vc, p, b - 1, b - t - count, 1923 -count * vc->vc_cols); 1924 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1925 scr_memsetw((unsigned short *) (vc->vc_origin + 1926 vc->vc_size_row * 1927 t), 1928 vc->vc_video_erase_char, 1929 vc->vc_size_row * count); 1930 return true; 1931 } 1932 } 1933 return false; 1934 } 1935 1936 1937 static void updatescrollmode_accel(struct fbcon_display *p, 1938 struct fb_info *info, 1939 struct vc_data *vc) 1940 { 1941 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1942 struct fbcon_ops *ops = info->fbcon_par; 1943 int cap = info->flags; 1944 u16 t = 0; 1945 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1946 info->fix.xpanstep); 1947 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1948 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1949 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1950 info->var.xres_virtual); 1951 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1952 divides(ypan, vc->vc_font.height) && vyres > yres; 1953 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1954 divides(ywrap, vc->vc_font.height) && 1955 divides(vc->vc_font.height, vyres) && 1956 divides(vc->vc_font.height, yres); 1957 int reading_fast = cap & FBINFO_READS_FAST; 1958 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1959 !(cap & FBINFO_HWACCEL_DISABLED); 1960 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1961 !(cap & FBINFO_HWACCEL_DISABLED); 1962 1963 if (good_wrap || good_pan) { 1964 if (reading_fast || fast_copyarea) 1965 p->scrollmode = good_wrap ? 1966 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1967 else 1968 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1969 SCROLL_PAN_REDRAW; 1970 } else { 1971 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1972 p->scrollmode = SCROLL_MOVE; 1973 else 1974 p->scrollmode = SCROLL_REDRAW; 1975 } 1976 #endif 1977 } 1978 1979 static void updatescrollmode(struct fbcon_display *p, 1980 struct fb_info *info, 1981 struct vc_data *vc) 1982 { 1983 struct fbcon_ops *ops = info->fbcon_par; 1984 int fh = vc->vc_font.height; 1985 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1986 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1987 info->var.xres_virtual); 1988 1989 p->vrows = vyres/fh; 1990 if (yres > (fh * (vc->vc_rows + 1))) 1991 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1992 if ((yres % fh) && (vyres % fh < yres % fh)) 1993 p->vrows--; 1994 1995 /* update scrollmode in case hardware acceleration is used */ 1996 updatescrollmode_accel(p, info, vc); 1997 } 1998 1999 #define PITCH(w) (((w) + 7) >> 3) 2000 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2001 2002 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2003 unsigned int height, unsigned int user) 2004 { 2005 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2006 struct fbcon_ops *ops = info->fbcon_par; 2007 struct fbcon_display *p = &fb_display[vc->vc_num]; 2008 struct fb_var_screeninfo var = info->var; 2009 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2010 2011 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2012 int size; 2013 int pitch = PITCH(vc->vc_font.width); 2014 2015 /* 2016 * If user font, ensure that a possible change to user font 2017 * height or width will not allow a font data out-of-bounds access. 2018 * NOTE: must use original charcount in calculation as font 2019 * charcount can change and cannot be used to determine the 2020 * font data allocated size. 2021 */ 2022 if (pitch <= 0) 2023 return -EINVAL; 2024 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2025 if (size > FNTSIZE(vc->vc_font.data)) 2026 return -EINVAL; 2027 } 2028 2029 virt_w = FBCON_SWAP(ops->rotate, width, height); 2030 virt_h = FBCON_SWAP(ops->rotate, height, width); 2031 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2032 vc->vc_font.height); 2033 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2034 vc->vc_font.width); 2035 var.xres = virt_w * virt_fw; 2036 var.yres = virt_h * virt_fh; 2037 x_diff = info->var.xres - var.xres; 2038 y_diff = info->var.yres - var.yres; 2039 if (x_diff < 0 || x_diff > virt_fw || 2040 y_diff < 0 || y_diff > virt_fh) { 2041 const struct fb_videomode *mode; 2042 2043 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2044 mode = fb_find_best_mode(&var, &info->modelist); 2045 if (mode == NULL) 2046 return -EINVAL; 2047 display_to_var(&var, p); 2048 fb_videomode_to_var(&var, mode); 2049 2050 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2051 return -EINVAL; 2052 2053 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2054 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2055 var.activate = FB_ACTIVATE_NOW | 2056 FB_ACTIVATE_FORCE; 2057 fb_set_var(info, &var); 2058 } 2059 var_to_display(p, &info->var, info); 2060 ops->var = info->var; 2061 } 2062 updatescrollmode(p, info, vc); 2063 return 0; 2064 } 2065 2066 static int fbcon_switch(struct vc_data *vc) 2067 { 2068 struct fb_info *info, *old_info = NULL; 2069 struct fbcon_ops *ops; 2070 struct fbcon_display *p = &fb_display[vc->vc_num]; 2071 struct fb_var_screeninfo var; 2072 int i, ret, prev_console; 2073 2074 info = fbcon_info_from_console(vc->vc_num); 2075 ops = info->fbcon_par; 2076 2077 if (logo_shown >= 0) { 2078 struct vc_data *conp2 = vc_cons[logo_shown].d; 2079 2080 if (conp2->vc_top == logo_lines 2081 && conp2->vc_bottom == conp2->vc_rows) 2082 conp2->vc_top = 0; 2083 logo_shown = FBCON_LOGO_CANSHOW; 2084 } 2085 2086 prev_console = ops->currcon; 2087 if (prev_console != -1) 2088 old_info = fbcon_info_from_console(prev_console); 2089 /* 2090 * FIXME: If we have multiple fbdev's loaded, we need to 2091 * update all info->currcon. Perhaps, we can place this 2092 * in a centralized structure, but this might break some 2093 * drivers. 2094 * 2095 * info->currcon = vc->vc_num; 2096 */ 2097 fbcon_for_each_registered_fb(i) { 2098 if (fbcon_registered_fb[i]->fbcon_par) { 2099 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2100 2101 o->currcon = vc->vc_num; 2102 } 2103 } 2104 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2105 display_to_var(&var, p); 2106 var.activate = FB_ACTIVATE_NOW; 2107 2108 /* 2109 * make sure we don't unnecessarily trip the memcmp() 2110 * in fb_set_var() 2111 */ 2112 info->var.activate = var.activate; 2113 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2114 fb_set_var(info, &var); 2115 ops->var = info->var; 2116 2117 if (old_info != NULL && (old_info != info || 2118 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2119 if (info->fbops->fb_set_par) { 2120 ret = info->fbops->fb_set_par(info); 2121 2122 if (ret) 2123 printk(KERN_ERR "fbcon_switch: detected " 2124 "unhandled fb_set_par error, " 2125 "error code %d\n", ret); 2126 } 2127 2128 if (old_info != info) 2129 fbcon_del_cursor_work(old_info); 2130 } 2131 2132 if (fbcon_is_inactive(vc, info) || 2133 ops->blank_state != FB_BLANK_UNBLANK) 2134 fbcon_del_cursor_work(info); 2135 else 2136 fbcon_add_cursor_work(info); 2137 2138 set_blitting_type(vc, info); 2139 ops->cursor_reset = 1; 2140 2141 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2142 ops->rotate = FB_ROTATE_UR; 2143 set_blitting_type(vc, info); 2144 } 2145 2146 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2147 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2148 2149 if (vc->vc_font.charcount > 256) 2150 vc->vc_complement_mask <<= 1; 2151 2152 updatescrollmode(p, info, vc); 2153 2154 switch (fb_scrollmode(p)) { 2155 case SCROLL_WRAP_MOVE: 2156 scrollback_phys_max = p->vrows - vc->vc_rows; 2157 break; 2158 case SCROLL_PAN_MOVE: 2159 case SCROLL_PAN_REDRAW: 2160 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2161 if (scrollback_phys_max < 0) 2162 scrollback_phys_max = 0; 2163 break; 2164 default: 2165 scrollback_phys_max = 0; 2166 break; 2167 } 2168 2169 scrollback_max = 0; 2170 scrollback_current = 0; 2171 2172 if (!fbcon_is_inactive(vc, info)) { 2173 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2174 ops->update_start(info); 2175 } 2176 2177 fbcon_set_palette(vc, color_table); 2178 fbcon_clear_margins(vc, 0); 2179 2180 if (logo_shown == FBCON_LOGO_DRAW) { 2181 2182 logo_shown = fg_console; 2183 fb_show_logo(info, ops->rotate); 2184 update_region(vc, 2185 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2186 vc->vc_size_row * (vc->vc_bottom - 2187 vc->vc_top) / 2); 2188 return 0; 2189 } 2190 return 1; 2191 } 2192 2193 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2194 int blank) 2195 { 2196 if (blank) { 2197 unsigned short charmask = vc->vc_hi_font_mask ? 2198 0x1ff : 0xff; 2199 unsigned short oldc; 2200 2201 oldc = vc->vc_video_erase_char; 2202 vc->vc_video_erase_char &= charmask; 2203 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2204 vc->vc_video_erase_char = oldc; 2205 } 2206 } 2207 2208 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2209 { 2210 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2211 struct fbcon_ops *ops = info->fbcon_par; 2212 2213 if (mode_switch) { 2214 struct fb_var_screeninfo var = info->var; 2215 2216 ops->graphics = 1; 2217 2218 if (!blank) { 2219 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2220 FB_ACTIVATE_KD_TEXT; 2221 fb_set_var(info, &var); 2222 ops->graphics = 0; 2223 ops->var = info->var; 2224 } 2225 } 2226 2227 if (!fbcon_is_inactive(vc, info)) { 2228 if (ops->blank_state != blank) { 2229 ops->blank_state = blank; 2230 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2231 ops->cursor_flash = (!blank); 2232 2233 if (fb_blank(info, blank)) 2234 fbcon_generic_blank(vc, info, blank); 2235 } 2236 2237 if (!blank) 2238 update_screen(vc); 2239 } 2240 2241 if (mode_switch || fbcon_is_inactive(vc, info) || 2242 ops->blank_state != FB_BLANK_UNBLANK) 2243 fbcon_del_cursor_work(info); 2244 else 2245 fbcon_add_cursor_work(info); 2246 2247 return 0; 2248 } 2249 2250 static int fbcon_debug_enter(struct vc_data *vc) 2251 { 2252 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2253 struct fbcon_ops *ops = info->fbcon_par; 2254 2255 ops->save_graphics = ops->graphics; 2256 ops->graphics = 0; 2257 if (info->fbops->fb_debug_enter) 2258 info->fbops->fb_debug_enter(info); 2259 fbcon_set_palette(vc, color_table); 2260 return 0; 2261 } 2262 2263 static int fbcon_debug_leave(struct vc_data *vc) 2264 { 2265 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2266 struct fbcon_ops *ops = info->fbcon_par; 2267 2268 ops->graphics = ops->save_graphics; 2269 if (info->fbops->fb_debug_leave) 2270 info->fbops->fb_debug_leave(info); 2271 return 0; 2272 } 2273 2274 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2275 { 2276 u8 *fontdata = vc->vc_font.data; 2277 u8 *data = font->data; 2278 int i, j; 2279 2280 font->width = vc->vc_font.width; 2281 font->height = vc->vc_font.height; 2282 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2283 if (!font->data) 2284 return 0; 2285 2286 if (font->width <= 8) { 2287 j = vc->vc_font.height; 2288 if (font->charcount * j > FNTSIZE(fontdata)) 2289 return -EINVAL; 2290 2291 for (i = 0; i < font->charcount; i++) { 2292 memcpy(data, fontdata, j); 2293 memset(data + j, 0, 32 - j); 2294 data += 32; 2295 fontdata += j; 2296 } 2297 } else if (font->width <= 16) { 2298 j = vc->vc_font.height * 2; 2299 if (font->charcount * j > FNTSIZE(fontdata)) 2300 return -EINVAL; 2301 2302 for (i = 0; i < font->charcount; i++) { 2303 memcpy(data, fontdata, j); 2304 memset(data + j, 0, 64 - j); 2305 data += 64; 2306 fontdata += j; 2307 } 2308 } else if (font->width <= 24) { 2309 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2310 return -EINVAL; 2311 2312 for (i = 0; i < font->charcount; i++) { 2313 for (j = 0; j < vc->vc_font.height; j++) { 2314 *data++ = fontdata[0]; 2315 *data++ = fontdata[1]; 2316 *data++ = fontdata[2]; 2317 fontdata += sizeof(u32); 2318 } 2319 memset(data, 0, 3 * (32 - j)); 2320 data += 3 * (32 - j); 2321 } 2322 } else { 2323 j = vc->vc_font.height * 4; 2324 if (font->charcount * j > FNTSIZE(fontdata)) 2325 return -EINVAL; 2326 2327 for (i = 0; i < font->charcount; i++) { 2328 memcpy(data, fontdata, j); 2329 memset(data + j, 0, 128 - j); 2330 data += 128; 2331 fontdata += j; 2332 } 2333 } 2334 return 0; 2335 } 2336 2337 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2338 static void set_vc_hi_font(struct vc_data *vc, bool set) 2339 { 2340 if (!set) { 2341 vc->vc_hi_font_mask = 0; 2342 if (vc->vc_can_do_color) { 2343 vc->vc_complement_mask >>= 1; 2344 vc->vc_s_complement_mask >>= 1; 2345 } 2346 2347 /* ++Edmund: reorder the attribute bits */ 2348 if (vc->vc_can_do_color) { 2349 unsigned short *cp = 2350 (unsigned short *) vc->vc_origin; 2351 int count = vc->vc_screenbuf_size / 2; 2352 unsigned short c; 2353 for (; count > 0; count--, cp++) { 2354 c = scr_readw(cp); 2355 scr_writew(((c & 0xfe00) >> 1) | 2356 (c & 0xff), cp); 2357 } 2358 c = vc->vc_video_erase_char; 2359 vc->vc_video_erase_char = 2360 ((c & 0xfe00) >> 1) | (c & 0xff); 2361 vc->vc_attr >>= 1; 2362 } 2363 } else { 2364 vc->vc_hi_font_mask = 0x100; 2365 if (vc->vc_can_do_color) { 2366 vc->vc_complement_mask <<= 1; 2367 vc->vc_s_complement_mask <<= 1; 2368 } 2369 2370 /* ++Edmund: reorder the attribute bits */ 2371 { 2372 unsigned short *cp = 2373 (unsigned short *) vc->vc_origin; 2374 int count = vc->vc_screenbuf_size / 2; 2375 unsigned short c; 2376 for (; count > 0; count--, cp++) { 2377 unsigned short newc; 2378 c = scr_readw(cp); 2379 if (vc->vc_can_do_color) 2380 newc = 2381 ((c & 0xff00) << 1) | (c & 2382 0xff); 2383 else 2384 newc = c & ~0x100; 2385 scr_writew(newc, cp); 2386 } 2387 c = vc->vc_video_erase_char; 2388 if (vc->vc_can_do_color) { 2389 vc->vc_video_erase_char = 2390 ((c & 0xff00) << 1) | (c & 0xff); 2391 vc->vc_attr <<= 1; 2392 } else 2393 vc->vc_video_erase_char = c & ~0x100; 2394 } 2395 } 2396 } 2397 2398 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2399 const u8 * data, int userfont) 2400 { 2401 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2402 struct fbcon_ops *ops = info->fbcon_par; 2403 struct fbcon_display *p = &fb_display[vc->vc_num]; 2404 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2405 char *old_data = NULL; 2406 2407 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2408 if (p->userfont) 2409 old_data = vc->vc_font.data; 2410 vc->vc_font.data = (void *)(p->fontdata = data); 2411 old_userfont = p->userfont; 2412 if ((p->userfont = userfont)) 2413 REFCOUNT(data)++; 2414 2415 old_width = vc->vc_font.width; 2416 old_height = vc->vc_font.height; 2417 old_charcount = vc->vc_font.charcount; 2418 2419 vc->vc_font.width = w; 2420 vc->vc_font.height = h; 2421 vc->vc_font.charcount = charcount; 2422 if (vc->vc_hi_font_mask && charcount == 256) 2423 set_vc_hi_font(vc, false); 2424 else if (!vc->vc_hi_font_mask && charcount == 512) 2425 set_vc_hi_font(vc, true); 2426 2427 if (resize) { 2428 int cols, rows; 2429 2430 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2431 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2432 cols /= w; 2433 rows /= h; 2434 ret = vc_resize(vc, cols, rows); 2435 if (ret) 2436 goto err_out; 2437 } else if (con_is_visible(vc) 2438 && vc->vc_mode == KD_TEXT) { 2439 fbcon_clear_margins(vc, 0); 2440 update_screen(vc); 2441 } 2442 2443 if (old_data && (--REFCOUNT(old_data) == 0)) 2444 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2445 return 0; 2446 2447 err_out: 2448 p->fontdata = old_data; 2449 vc->vc_font.data = (void *)old_data; 2450 2451 if (userfont) { 2452 p->userfont = old_userfont; 2453 if (--REFCOUNT(data) == 0) 2454 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2455 } 2456 2457 vc->vc_font.width = old_width; 2458 vc->vc_font.height = old_height; 2459 vc->vc_font.charcount = old_charcount; 2460 2461 return ret; 2462 } 2463 2464 /* 2465 * User asked to set font; we are guaranteed that 2466 * a) width and height are in range 1..32 2467 * b) charcount does not exceed 512 2468 * but lets not assume that, since someone might someday want to use larger 2469 * fonts. And charcount of 512 is small for unicode support. 2470 * 2471 * However, user space gives the font in 32 rows , regardless of 2472 * actual font height. So a new API is needed if support for larger fonts 2473 * is ever implemented. 2474 */ 2475 2476 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2477 unsigned int flags) 2478 { 2479 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2480 unsigned charcount = font->charcount; 2481 int w = font->width; 2482 int h = font->height; 2483 int size; 2484 int i, csum; 2485 u8 *new_data, *data = font->data; 2486 int pitch = PITCH(font->width); 2487 2488 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2489 * If not this check should be changed to charcount < 256 */ 2490 if (charcount != 256 && charcount != 512) 2491 return -EINVAL; 2492 2493 /* font bigger than screen resolution ? */ 2494 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2495 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2496 return -EINVAL; 2497 2498 /* Make sure drawing engine can handle the font */ 2499 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2500 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2501 return -EINVAL; 2502 2503 /* Make sure driver can handle the font length */ 2504 if (fbcon_invalid_charcount(info, charcount)) 2505 return -EINVAL; 2506 2507 size = CALC_FONTSZ(h, pitch, charcount); 2508 2509 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2510 2511 if (!new_data) 2512 return -ENOMEM; 2513 2514 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2515 2516 new_data += FONT_EXTRA_WORDS * sizeof(int); 2517 FNTSIZE(new_data) = size; 2518 REFCOUNT(new_data) = 0; /* usage counter */ 2519 for (i=0; i< charcount; i++) { 2520 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2521 } 2522 2523 /* Since linux has a nice crc32 function use it for counting font 2524 * checksums. */ 2525 csum = crc32(0, new_data, size); 2526 2527 FNTSUM(new_data) = csum; 2528 /* Check if the same font is on some other console already */ 2529 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2530 struct vc_data *tmp = vc_cons[i].d; 2531 2532 if (fb_display[i].userfont && 2533 fb_display[i].fontdata && 2534 FNTSUM(fb_display[i].fontdata) == csum && 2535 FNTSIZE(fb_display[i].fontdata) == size && 2536 tmp->vc_font.width == w && 2537 !memcmp(fb_display[i].fontdata, new_data, size)) { 2538 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2539 new_data = (u8 *)fb_display[i].fontdata; 2540 break; 2541 } 2542 } 2543 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2544 } 2545 2546 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2547 { 2548 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2549 const struct font_desc *f; 2550 2551 if (!name) 2552 f = get_default_font(info->var.xres, info->var.yres, 2553 info->pixmap.blit_x, info->pixmap.blit_y); 2554 else if (!(f = find_font(name))) 2555 return -ENOENT; 2556 2557 font->width = f->width; 2558 font->height = f->height; 2559 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2560 } 2561 2562 static u16 palette_red[16]; 2563 static u16 palette_green[16]; 2564 static u16 palette_blue[16]; 2565 2566 static struct fb_cmap palette_cmap = { 2567 0, 16, palette_red, palette_green, palette_blue, NULL 2568 }; 2569 2570 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2571 { 2572 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2573 int i, j, k, depth; 2574 u8 val; 2575 2576 if (fbcon_is_inactive(vc, info)) 2577 return; 2578 2579 if (!con_is_visible(vc)) 2580 return; 2581 2582 depth = fb_get_color_depth(&info->var, &info->fix); 2583 if (depth > 3) { 2584 for (i = j = 0; i < 16; i++) { 2585 k = table[i]; 2586 val = vc->vc_palette[j++]; 2587 palette_red[k] = (val << 8) | val; 2588 val = vc->vc_palette[j++]; 2589 palette_green[k] = (val << 8) | val; 2590 val = vc->vc_palette[j++]; 2591 palette_blue[k] = (val << 8) | val; 2592 } 2593 palette_cmap.len = 16; 2594 palette_cmap.start = 0; 2595 /* 2596 * If framebuffer is capable of less than 16 colors, 2597 * use default palette of fbcon. 2598 */ 2599 } else 2600 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2601 2602 fb_set_cmap(&palette_cmap, info); 2603 } 2604 2605 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2606 { 2607 return (u16 *) (vc->vc_origin + offset); 2608 } 2609 2610 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2611 int *px, int *py) 2612 { 2613 unsigned long ret; 2614 int x, y; 2615 2616 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2617 unsigned long offset = (pos - vc->vc_origin) / 2; 2618 2619 x = offset % vc->vc_cols; 2620 y = offset / vc->vc_cols; 2621 ret = pos + (vc->vc_cols - x) * 2; 2622 } else { 2623 /* Should not happen */ 2624 x = y = 0; 2625 ret = vc->vc_origin; 2626 } 2627 if (px) 2628 *px = x; 2629 if (py) 2630 *py = y; 2631 return ret; 2632 } 2633 2634 /* As we might be inside of softback, we may work with non-contiguous buffer, 2635 that's why we have to use a separate routine. */ 2636 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2637 { 2638 while (cnt--) { 2639 u16 a = scr_readw(p); 2640 if (!vc->vc_can_do_color) 2641 a ^= 0x0800; 2642 else if (vc->vc_hi_font_mask == 0x100) 2643 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2644 (((a) & 0x0e00) << 4); 2645 else 2646 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2647 (((a) & 0x0700) << 4); 2648 scr_writew(a, p++); 2649 } 2650 } 2651 2652 void fbcon_suspended(struct fb_info *info) 2653 { 2654 struct vc_data *vc = NULL; 2655 struct fbcon_ops *ops = info->fbcon_par; 2656 2657 if (!ops || ops->currcon < 0) 2658 return; 2659 vc = vc_cons[ops->currcon].d; 2660 2661 /* Clear cursor, restore saved data */ 2662 fbcon_cursor(vc, CM_ERASE); 2663 } 2664 2665 void fbcon_resumed(struct fb_info *info) 2666 { 2667 struct vc_data *vc; 2668 struct fbcon_ops *ops = info->fbcon_par; 2669 2670 if (!ops || ops->currcon < 0) 2671 return; 2672 vc = vc_cons[ops->currcon].d; 2673 2674 update_screen(vc); 2675 } 2676 2677 static void fbcon_modechanged(struct fb_info *info) 2678 { 2679 struct fbcon_ops *ops = info->fbcon_par; 2680 struct vc_data *vc; 2681 struct fbcon_display *p; 2682 int rows, cols; 2683 2684 if (!ops || ops->currcon < 0) 2685 return; 2686 vc = vc_cons[ops->currcon].d; 2687 if (vc->vc_mode != KD_TEXT || 2688 fbcon_info_from_console(ops->currcon) != info) 2689 return; 2690 2691 p = &fb_display[vc->vc_num]; 2692 set_blitting_type(vc, info); 2693 2694 if (con_is_visible(vc)) { 2695 var_to_display(p, &info->var, info); 2696 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2697 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2698 cols /= vc->vc_font.width; 2699 rows /= vc->vc_font.height; 2700 vc_resize(vc, cols, rows); 2701 updatescrollmode(p, info, vc); 2702 scrollback_max = 0; 2703 scrollback_current = 0; 2704 2705 if (!fbcon_is_inactive(vc, info)) { 2706 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2707 ops->update_start(info); 2708 } 2709 2710 fbcon_set_palette(vc, color_table); 2711 update_screen(vc); 2712 } 2713 } 2714 2715 static void fbcon_set_all_vcs(struct fb_info *info) 2716 { 2717 struct fbcon_ops *ops = info->fbcon_par; 2718 struct vc_data *vc; 2719 struct fbcon_display *p; 2720 int i, rows, cols, fg = -1; 2721 2722 if (!ops || ops->currcon < 0) 2723 return; 2724 2725 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2726 vc = vc_cons[i].d; 2727 if (!vc || vc->vc_mode != KD_TEXT || 2728 fbcon_info_from_console(i) != info) 2729 continue; 2730 2731 if (con_is_visible(vc)) { 2732 fg = i; 2733 continue; 2734 } 2735 2736 p = &fb_display[vc->vc_num]; 2737 set_blitting_type(vc, info); 2738 var_to_display(p, &info->var, info); 2739 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2740 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2741 cols /= vc->vc_font.width; 2742 rows /= vc->vc_font.height; 2743 vc_resize(vc, cols, rows); 2744 } 2745 2746 if (fg != -1) 2747 fbcon_modechanged(info); 2748 } 2749 2750 2751 void fbcon_update_vcs(struct fb_info *info, bool all) 2752 { 2753 if (all) 2754 fbcon_set_all_vcs(info); 2755 else 2756 fbcon_modechanged(info); 2757 } 2758 EXPORT_SYMBOL(fbcon_update_vcs); 2759 2760 /* let fbcon check if it supports a new screen resolution */ 2761 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2762 { 2763 struct fbcon_ops *ops = info->fbcon_par; 2764 struct vc_data *vc; 2765 unsigned int i; 2766 2767 WARN_CONSOLE_UNLOCKED(); 2768 2769 if (!ops) 2770 return 0; 2771 2772 /* prevent setting a screen size which is smaller than font size */ 2773 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2774 vc = vc_cons[i].d; 2775 if (!vc || vc->vc_mode != KD_TEXT || 2776 fbcon_info_from_console(i) != info) 2777 continue; 2778 2779 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2780 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2781 return -EINVAL; 2782 } 2783 2784 return 0; 2785 } 2786 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2787 2788 int fbcon_mode_deleted(struct fb_info *info, 2789 struct fb_videomode *mode) 2790 { 2791 struct fb_info *fb_info; 2792 struct fbcon_display *p; 2793 int i, j, found = 0; 2794 2795 /* before deletion, ensure that mode is not in use */ 2796 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2797 j = con2fb_map[i]; 2798 if (j == -1) 2799 continue; 2800 fb_info = fbcon_registered_fb[j]; 2801 if (fb_info != info) 2802 continue; 2803 p = &fb_display[i]; 2804 if (!p || !p->mode) 2805 continue; 2806 if (fb_mode_is_equal(p->mode, mode)) { 2807 found = 1; 2808 break; 2809 } 2810 } 2811 return found; 2812 } 2813 2814 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2815 static void fbcon_unbind(void) 2816 { 2817 int ret; 2818 2819 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2820 fbcon_is_default); 2821 2822 if (!ret) 2823 fbcon_has_console_bind = 0; 2824 } 2825 #else 2826 static inline void fbcon_unbind(void) {} 2827 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2828 2829 void fbcon_fb_unbind(struct fb_info *info) 2830 { 2831 int i, new_idx = -1; 2832 int idx = info->node; 2833 2834 console_lock(); 2835 2836 if (!fbcon_has_console_bind) { 2837 console_unlock(); 2838 return; 2839 } 2840 2841 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2842 if (con2fb_map[i] != idx && 2843 con2fb_map[i] != -1) { 2844 new_idx = con2fb_map[i]; 2845 break; 2846 } 2847 } 2848 2849 if (new_idx != -1) { 2850 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2851 if (con2fb_map[i] == idx) 2852 set_con2fb_map(i, new_idx, 0); 2853 } 2854 } else { 2855 struct fb_info *info = fbcon_registered_fb[idx]; 2856 2857 /* This is sort of like set_con2fb_map, except it maps 2858 * the consoles to no device and then releases the 2859 * oldinfo to free memory and cancel the cursor blink 2860 * timer. I can imagine this just becoming part of 2861 * set_con2fb_map where new_idx is -1 2862 */ 2863 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2864 if (con2fb_map[i] == idx) { 2865 con2fb_map[i] = -1; 2866 if (!search_fb_in_map(idx)) { 2867 con2fb_release_oldinfo(vc_cons[i].d, 2868 info, NULL); 2869 } 2870 } 2871 } 2872 fbcon_unbind(); 2873 } 2874 2875 console_unlock(); 2876 } 2877 2878 void fbcon_fb_unregistered(struct fb_info *info) 2879 { 2880 int i, idx; 2881 2882 console_lock(); 2883 2884 fbcon_registered_fb[info->node] = NULL; 2885 fbcon_num_registered_fb--; 2886 2887 if (deferred_takeover) { 2888 console_unlock(); 2889 return; 2890 } 2891 2892 idx = info->node; 2893 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2894 if (con2fb_map[i] == idx) 2895 con2fb_map[i] = -1; 2896 } 2897 2898 if (idx == info_idx) { 2899 info_idx = -1; 2900 2901 fbcon_for_each_registered_fb(i) { 2902 info_idx = i; 2903 break; 2904 } 2905 } 2906 2907 if (info_idx != -1) { 2908 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2909 if (con2fb_map[i] == -1) 2910 con2fb_map[i] = info_idx; 2911 } 2912 } 2913 2914 if (primary_device == idx) 2915 primary_device = -1; 2916 2917 if (!fbcon_num_registered_fb) 2918 do_unregister_con_driver(&fb_con); 2919 console_unlock(); 2920 } 2921 2922 void fbcon_remap_all(struct fb_info *info) 2923 { 2924 int i, idx = info->node; 2925 2926 console_lock(); 2927 if (deferred_takeover) { 2928 for (i = first_fb_vc; i <= last_fb_vc; i++) 2929 con2fb_map_boot[i] = idx; 2930 fbcon_map_override(); 2931 console_unlock(); 2932 return; 2933 } 2934 2935 for (i = first_fb_vc; i <= last_fb_vc; i++) 2936 set_con2fb_map(i, idx, 0); 2937 2938 if (con_is_bound(&fb_con)) { 2939 printk(KERN_INFO "fbcon: Remapping primary device, " 2940 "fb%i, to tty %i-%i\n", idx, 2941 first_fb_vc + 1, last_fb_vc + 1); 2942 info_idx = idx; 2943 } 2944 console_unlock(); 2945 } 2946 2947 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2948 static void fbcon_select_primary(struct fb_info *info) 2949 { 2950 if (!map_override && primary_device == -1 && 2951 fb_is_primary_device(info)) { 2952 int i; 2953 2954 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2955 info->fix.id, info->node); 2956 primary_device = info->node; 2957 2958 for (i = first_fb_vc; i <= last_fb_vc; i++) 2959 con2fb_map_boot[i] = primary_device; 2960 2961 if (con_is_bound(&fb_con)) { 2962 printk(KERN_INFO "fbcon: Remapping primary device, " 2963 "fb%i, to tty %i-%i\n", info->node, 2964 first_fb_vc + 1, last_fb_vc + 1); 2965 info_idx = primary_device; 2966 } 2967 } 2968 2969 } 2970 #else 2971 static inline void fbcon_select_primary(struct fb_info *info) 2972 { 2973 return; 2974 } 2975 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2976 2977 static bool lockless_register_fb; 2978 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2979 MODULE_PARM_DESC(lockless_register_fb, 2980 "Lockless framebuffer registration for debugging [default=off]"); 2981 2982 /* called with console_lock held */ 2983 static int do_fb_registered(struct fb_info *info) 2984 { 2985 int ret = 0, i, idx; 2986 2987 WARN_CONSOLE_UNLOCKED(); 2988 2989 fbcon_registered_fb[info->node] = info; 2990 fbcon_num_registered_fb++; 2991 2992 idx = info->node; 2993 fbcon_select_primary(info); 2994 2995 if (deferred_takeover) { 2996 pr_info("fbcon: Deferring console take-over\n"); 2997 return 0; 2998 } 2999 3000 if (info_idx == -1) { 3001 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3002 if (con2fb_map_boot[i] == idx) { 3003 info_idx = idx; 3004 break; 3005 } 3006 } 3007 3008 if (info_idx != -1) 3009 ret = do_fbcon_takeover(1); 3010 } else { 3011 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3012 if (con2fb_map_boot[i] == idx) 3013 set_con2fb_map(i, idx, 0); 3014 } 3015 } 3016 3017 return ret; 3018 } 3019 3020 int fbcon_fb_registered(struct fb_info *info) 3021 { 3022 int ret; 3023 3024 if (!lockless_register_fb) 3025 console_lock(); 3026 else 3027 atomic_inc(&ignore_console_lock_warning); 3028 3029 ret = do_fb_registered(info); 3030 3031 if (!lockless_register_fb) 3032 console_unlock(); 3033 else 3034 atomic_dec(&ignore_console_lock_warning); 3035 3036 return ret; 3037 } 3038 3039 void fbcon_fb_blanked(struct fb_info *info, int blank) 3040 { 3041 struct fbcon_ops *ops = info->fbcon_par; 3042 struct vc_data *vc; 3043 3044 if (!ops || ops->currcon < 0) 3045 return; 3046 3047 vc = vc_cons[ops->currcon].d; 3048 if (vc->vc_mode != KD_TEXT || 3049 fbcon_info_from_console(ops->currcon) != info) 3050 return; 3051 3052 if (con_is_visible(vc)) { 3053 if (blank) 3054 do_blank_screen(0); 3055 else 3056 do_unblank_screen(0); 3057 } 3058 ops->blank_state = blank; 3059 } 3060 3061 void fbcon_new_modelist(struct fb_info *info) 3062 { 3063 int i; 3064 struct vc_data *vc; 3065 struct fb_var_screeninfo var; 3066 const struct fb_videomode *mode; 3067 3068 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3069 if (fbcon_info_from_console(i) != info) 3070 continue; 3071 if (!fb_display[i].mode) 3072 continue; 3073 vc = vc_cons[i].d; 3074 display_to_var(&var, &fb_display[i]); 3075 mode = fb_find_nearest_mode(fb_display[i].mode, 3076 &info->modelist); 3077 fb_videomode_to_var(&var, mode); 3078 fbcon_set_disp(info, &var, vc->vc_num); 3079 } 3080 } 3081 3082 void fbcon_get_requirement(struct fb_info *info, 3083 struct fb_blit_caps *caps) 3084 { 3085 struct vc_data *vc; 3086 3087 if (caps->flags) { 3088 int i, charcnt; 3089 3090 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3091 vc = vc_cons[i].d; 3092 if (vc && vc->vc_mode == KD_TEXT && 3093 info->node == con2fb_map[i]) { 3094 caps->x |= 1 << (vc->vc_font.width - 1); 3095 caps->y |= 1 << (vc->vc_font.height - 1); 3096 charcnt = vc->vc_font.charcount; 3097 if (caps->len < charcnt) 3098 caps->len = charcnt; 3099 } 3100 } 3101 } else { 3102 vc = vc_cons[fg_console].d; 3103 3104 if (vc && vc->vc_mode == KD_TEXT && 3105 info->node == con2fb_map[fg_console]) { 3106 caps->x = 1 << (vc->vc_font.width - 1); 3107 caps->y = 1 << (vc->vc_font.height - 1); 3108 caps->len = vc->vc_font.charcount; 3109 } 3110 } 3111 } 3112 3113 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3114 { 3115 struct fb_con2fbmap con2fb; 3116 int ret; 3117 3118 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3119 return -EFAULT; 3120 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3121 return -EINVAL; 3122 if (con2fb.framebuffer >= FB_MAX) 3123 return -EINVAL; 3124 if (!fbcon_registered_fb[con2fb.framebuffer]) 3125 request_module("fb%d", con2fb.framebuffer); 3126 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3127 return -EINVAL; 3128 } 3129 3130 console_lock(); 3131 ret = set_con2fb_map(con2fb.console - 1, 3132 con2fb.framebuffer, 1); 3133 console_unlock(); 3134 3135 return ret; 3136 } 3137 3138 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3139 { 3140 struct fb_con2fbmap con2fb; 3141 3142 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3143 return -EFAULT; 3144 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3145 return -EINVAL; 3146 3147 console_lock(); 3148 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3149 console_unlock(); 3150 3151 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3152 } 3153 3154 /* 3155 * The console `switch' structure for the frame buffer based console 3156 */ 3157 3158 static const struct consw fb_con = { 3159 .owner = THIS_MODULE, 3160 .con_startup = fbcon_startup, 3161 .con_init = fbcon_init, 3162 .con_deinit = fbcon_deinit, 3163 .con_clear = fbcon_clear, 3164 .con_putc = fbcon_putc, 3165 .con_putcs = fbcon_putcs, 3166 .con_cursor = fbcon_cursor, 3167 .con_scroll = fbcon_scroll, 3168 .con_switch = fbcon_switch, 3169 .con_blank = fbcon_blank, 3170 .con_font_set = fbcon_set_font, 3171 .con_font_get = fbcon_get_font, 3172 .con_font_default = fbcon_set_def_font, 3173 .con_set_palette = fbcon_set_palette, 3174 .con_invert_region = fbcon_invert_region, 3175 .con_screen_pos = fbcon_screen_pos, 3176 .con_getxy = fbcon_getxy, 3177 .con_resize = fbcon_resize, 3178 .con_debug_enter = fbcon_debug_enter, 3179 .con_debug_leave = fbcon_debug_leave, 3180 }; 3181 3182 static ssize_t store_rotate(struct device *device, 3183 struct device_attribute *attr, const char *buf, 3184 size_t count) 3185 { 3186 struct fb_info *info; 3187 int rotate, idx; 3188 char **last = NULL; 3189 3190 console_lock(); 3191 idx = con2fb_map[fg_console]; 3192 3193 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3194 goto err; 3195 3196 info = fbcon_registered_fb[idx]; 3197 rotate = simple_strtoul(buf, last, 0); 3198 fbcon_rotate(info, rotate); 3199 err: 3200 console_unlock(); 3201 return count; 3202 } 3203 3204 static ssize_t store_rotate_all(struct device *device, 3205 struct device_attribute *attr,const char *buf, 3206 size_t count) 3207 { 3208 struct fb_info *info; 3209 int rotate, idx; 3210 char **last = NULL; 3211 3212 console_lock(); 3213 idx = con2fb_map[fg_console]; 3214 3215 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3216 goto err; 3217 3218 info = fbcon_registered_fb[idx]; 3219 rotate = simple_strtoul(buf, last, 0); 3220 fbcon_rotate_all(info, rotate); 3221 err: 3222 console_unlock(); 3223 return count; 3224 } 3225 3226 static ssize_t show_rotate(struct device *device, 3227 struct device_attribute *attr,char *buf) 3228 { 3229 struct fb_info *info; 3230 int rotate = 0, idx; 3231 3232 console_lock(); 3233 idx = con2fb_map[fg_console]; 3234 3235 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3236 goto err; 3237 3238 info = fbcon_registered_fb[idx]; 3239 rotate = fbcon_get_rotate(info); 3240 err: 3241 console_unlock(); 3242 return sysfs_emit(buf, "%d\n", rotate); 3243 } 3244 3245 static ssize_t show_cursor_blink(struct device *device, 3246 struct device_attribute *attr, char *buf) 3247 { 3248 struct fb_info *info; 3249 struct fbcon_ops *ops; 3250 int idx, blink = -1; 3251 3252 console_lock(); 3253 idx = con2fb_map[fg_console]; 3254 3255 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3256 goto err; 3257 3258 info = fbcon_registered_fb[idx]; 3259 ops = info->fbcon_par; 3260 3261 if (!ops) 3262 goto err; 3263 3264 blink = delayed_work_pending(&ops->cursor_work); 3265 err: 3266 console_unlock(); 3267 return sysfs_emit(buf, "%d\n", blink); 3268 } 3269 3270 static ssize_t store_cursor_blink(struct device *device, 3271 struct device_attribute *attr, 3272 const char *buf, size_t count) 3273 { 3274 struct fb_info *info; 3275 int blink, idx; 3276 char **last = NULL; 3277 3278 console_lock(); 3279 idx = con2fb_map[fg_console]; 3280 3281 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3282 goto err; 3283 3284 info = fbcon_registered_fb[idx]; 3285 3286 if (!info->fbcon_par) 3287 goto err; 3288 3289 blink = simple_strtoul(buf, last, 0); 3290 3291 if (blink) { 3292 fbcon_cursor_noblink = 0; 3293 fbcon_add_cursor_work(info); 3294 } else { 3295 fbcon_cursor_noblink = 1; 3296 fbcon_del_cursor_work(info); 3297 } 3298 3299 err: 3300 console_unlock(); 3301 return count; 3302 } 3303 3304 static struct device_attribute device_attrs[] = { 3305 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3306 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3307 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3308 store_cursor_blink), 3309 }; 3310 3311 static int fbcon_init_device(void) 3312 { 3313 int i, error = 0; 3314 3315 fbcon_has_sysfs = 1; 3316 3317 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3318 error = device_create_file(fbcon_device, &device_attrs[i]); 3319 3320 if (error) 3321 break; 3322 } 3323 3324 if (error) { 3325 while (--i >= 0) 3326 device_remove_file(fbcon_device, &device_attrs[i]); 3327 3328 fbcon_has_sysfs = 0; 3329 } 3330 3331 return 0; 3332 } 3333 3334 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3335 static void fbcon_register_existing_fbs(struct work_struct *work) 3336 { 3337 int i; 3338 3339 console_lock(); 3340 3341 deferred_takeover = false; 3342 logo_shown = FBCON_LOGO_DONTSHOW; 3343 3344 fbcon_for_each_registered_fb(i) 3345 do_fb_registered(fbcon_registered_fb[i]); 3346 3347 console_unlock(); 3348 } 3349 3350 static struct notifier_block fbcon_output_nb; 3351 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3352 3353 static int fbcon_output_notifier(struct notifier_block *nb, 3354 unsigned long action, void *data) 3355 { 3356 WARN_CONSOLE_UNLOCKED(); 3357 3358 pr_info("fbcon: Taking over console\n"); 3359 3360 dummycon_unregister_output_notifier(&fbcon_output_nb); 3361 3362 /* We may get called in atomic context */ 3363 schedule_work(&fbcon_deferred_takeover_work); 3364 3365 return NOTIFY_OK; 3366 } 3367 #endif 3368 3369 static void fbcon_start(void) 3370 { 3371 WARN_CONSOLE_UNLOCKED(); 3372 3373 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3374 if (conswitchp != &dummy_con) 3375 deferred_takeover = false; 3376 3377 if (deferred_takeover) { 3378 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3379 dummycon_register_output_notifier(&fbcon_output_nb); 3380 return; 3381 } 3382 #endif 3383 } 3384 3385 void __init fb_console_init(void) 3386 { 3387 int i; 3388 3389 console_lock(); 3390 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3391 "fbcon"); 3392 3393 if (IS_ERR(fbcon_device)) { 3394 printk(KERN_WARNING "Unable to create device " 3395 "for fbcon; errno = %ld\n", 3396 PTR_ERR(fbcon_device)); 3397 fbcon_device = NULL; 3398 } else 3399 fbcon_init_device(); 3400 3401 for (i = 0; i < MAX_NR_CONSOLES; i++) 3402 con2fb_map[i] = -1; 3403 3404 fbcon_start(); 3405 console_unlock(); 3406 } 3407 3408 #ifdef MODULE 3409 3410 static void __exit fbcon_deinit_device(void) 3411 { 3412 int i; 3413 3414 if (fbcon_has_sysfs) { 3415 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3416 device_remove_file(fbcon_device, &device_attrs[i]); 3417 3418 fbcon_has_sysfs = 0; 3419 } 3420 } 3421 3422 void __exit fb_console_exit(void) 3423 { 3424 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3425 console_lock(); 3426 if (deferred_takeover) 3427 dummycon_unregister_output_notifier(&fbcon_output_nb); 3428 console_unlock(); 3429 3430 cancel_work_sync(&fbcon_deferred_takeover_work); 3431 #endif 3432 3433 console_lock(); 3434 fbcon_deinit_device(); 3435 device_destroy(fb_class, MKDEV(0, 0)); 3436 3437 do_unregister_con_driver(&fb_con); 3438 console_unlock(); 3439 } 3440 #endif 3441