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