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