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