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