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