1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/panic.h> 68 #include <linux/printk.h> 69 #include <linux/slab.h> 70 #include <linux/fb.h> 71 #include <linux/fbcon.h> 72 #include <linux/vt_kern.h> 73 #include <linux/selection.h> 74 #include <linux/font.h> 75 #include <linux/smp.h> 76 #include <linux/init.h> 77 #include <linux/interrupt.h> 78 #include <linux/crc32.h> /* For counting font checksums */ 79 #include <linux/uaccess.h> 80 #include <asm/irq.h> 81 82 #include "fbcon.h" 83 #include "fb_internal.h" 84 85 /* 86 * FIXME: Locking 87 * 88 * - fbcon state itself is protected by the console_lock, and the code does a 89 * pretty good job at making sure that lock is held everywhere it's needed. 90 * 91 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 92 * means concurrent access to the same fbdev from both fbcon and userspace 93 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 94 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 95 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 96 * fbmem.c cannot use locking asserts, and there's lots of callers which get 97 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 98 */ 99 100 enum { 101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 104 }; 105 106 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 107 108 static struct fb_info *fbcon_registered_fb[FB_MAX]; 109 static int fbcon_num_registered_fb; 110 111 #define fbcon_for_each_registered_fb(i) \ 112 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 113 if (!fbcon_registered_fb[i]) {} else 114 115 static signed char con2fb_map[MAX_NR_CONSOLES]; 116 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 117 118 static struct fb_info *fbcon_info_from_console(int console) 119 { 120 signed char fb; 121 WARN_CONSOLE_UNLOCKED(); 122 123 fb = con2fb_map[console]; 124 if (fb < 0 || fb >= ARRAY_SIZE(fbcon_registered_fb)) 125 return NULL; 126 127 return fbcon_registered_fb[fb]; 128 } 129 130 static int logo_lines; 131 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 132 enums. */ 133 static int logo_shown = FBCON_LOGO_CANSHOW; 134 /* console mappings */ 135 static unsigned int first_fb_vc; 136 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 137 static int fbcon_is_default = 1; 138 static int primary_device = -1; 139 static int fbcon_has_console_bind; 140 141 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 142 static int map_override; 143 144 static inline void fbcon_map_override(void) 145 { 146 map_override = 1; 147 } 148 #else 149 static inline void fbcon_map_override(void) 150 { 151 } 152 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 153 154 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 155 static bool deferred_takeover = true; 156 #else 157 #define deferred_takeover false 158 #endif 159 160 /* font data */ 161 static char fontname[40]; 162 163 /* current fb_info */ 164 static int info_idx = -1; 165 166 /* console rotation */ 167 static int initial_rotation = -1; 168 static int margin_color; 169 170 static const struct consw fb_con; 171 172 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 173 174 static int fbcon_cursor_noblink; 175 176 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 177 178 /* 179 * Interface used by the world 180 */ 181 182 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 183 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 184 185 /* 186 * Internal routines 187 */ 188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 189 int unit); 190 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 191 int line, int count, int dy); 192 static void fbcon_modechanged(struct fb_info *info); 193 static void fbcon_set_all_vcs(struct fb_info *info); 194 195 static struct device *fbcon_device; 196 197 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 198 static inline void fbcon_set_rotation(struct fb_info *info) 199 { 200 struct fbcon_ops *ops = info->fbcon_par; 201 202 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 203 ops->p->con_rotate < 4) 204 ops->rotate = ops->p->con_rotate; 205 else 206 ops->rotate = 0; 207 } 208 209 static void fbcon_rotate(struct fb_info *info, u32 rotate) 210 { 211 struct fbcon_ops *ops= info->fbcon_par; 212 struct fb_info *fb_info; 213 214 if (!ops || ops->currcon == -1) 215 return; 216 217 fb_info = fbcon_info_from_console(ops->currcon); 218 219 if (info == fb_info) { 220 struct fbcon_display *p = &fb_display[ops->currcon]; 221 222 if (rotate < 4) 223 p->con_rotate = rotate; 224 else 225 p->con_rotate = 0; 226 227 fbcon_modechanged(info); 228 } 229 } 230 231 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 232 { 233 struct fbcon_ops *ops = info->fbcon_par; 234 struct vc_data *vc; 235 struct fbcon_display *p; 236 int i; 237 238 if (!ops || ops->currcon < 0 || rotate > 3) 239 return; 240 241 for (i = first_fb_vc; i <= last_fb_vc; i++) { 242 vc = vc_cons[i].d; 243 if (!vc || vc->vc_mode != KD_TEXT || 244 fbcon_info_from_console(i) != info) 245 continue; 246 247 p = &fb_display[vc->vc_num]; 248 p->con_rotate = rotate; 249 } 250 251 fbcon_set_all_vcs(info); 252 } 253 #else 254 static inline void fbcon_set_rotation(struct fb_info *info) 255 { 256 struct fbcon_ops *ops = info->fbcon_par; 257 258 ops->rotate = FB_ROTATE_UR; 259 } 260 261 static void fbcon_rotate(struct fb_info *info, u32 rotate) 262 { 263 return; 264 } 265 266 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 267 { 268 return; 269 } 270 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 271 272 static int fbcon_get_rotate(struct fb_info *info) 273 { 274 struct fbcon_ops *ops = info->fbcon_par; 275 276 return (ops) ? ops->rotate : 0; 277 } 278 279 static bool fbcon_skip_panic(struct fb_info *info) 280 { 281 /* panic_cpu is not exported, and can't be used if built as module. Use 282 * oops_in_progress instead, but non-fatal oops won't be printed. 283 */ 284 #if defined(MODULE) 285 return (info->skip_panic && unlikely(oops_in_progress)); 286 #else 287 return (info->skip_panic && unlikely(atomic_read(&panic_cpu) != PANIC_CPU_INVALID)); 288 #endif 289 } 290 291 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 292 { 293 struct fbcon_ops *ops = info->fbcon_par; 294 295 return (info->state != FBINFO_STATE_RUNNING || 296 vc->vc_mode != KD_TEXT || ops->graphics || fbcon_skip_panic(info)); 297 } 298 299 static int get_color(struct vc_data *vc, struct fb_info *info, 300 u16 c, int is_fg) 301 { 302 int depth = fb_get_color_depth(&info->var, &info->fix); 303 int color = 0; 304 305 if (console_blanked) { 306 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 307 308 c = vc->vc_video_erase_char & charmask; 309 } 310 311 if (depth != 1) 312 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 313 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 314 315 switch (depth) { 316 case 1: 317 { 318 int col = mono_col(info); 319 /* 0 or 1 */ 320 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 321 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 322 323 if (console_blanked) 324 fg = bg; 325 326 color = (is_fg) ? fg : bg; 327 break; 328 } 329 case 2: 330 /* 331 * Scale down 16-colors to 4 colors. Default 4-color palette 332 * is grayscale. However, simply dividing the values by 4 333 * will not work, as colors 1, 2 and 3 will be scaled-down 334 * to zero rendering them invisible. So empirically convert 335 * colors to a sane 4-level grayscale. 336 */ 337 switch (color) { 338 case 0: 339 color = 0; /* black */ 340 break; 341 case 1 ... 6: 342 color = 2; /* white */ 343 break; 344 case 7 ... 8: 345 color = 1; /* gray */ 346 break; 347 default: 348 color = 3; /* intense white */ 349 break; 350 } 351 break; 352 case 3: 353 /* 354 * Last 8 entries of default 16-color palette is a more intense 355 * version of the first 8 (i.e., same chrominance, different 356 * luminance). 357 */ 358 color &= 7; 359 break; 360 } 361 362 363 return color; 364 } 365 366 static void fb_flashcursor(struct work_struct *work) 367 { 368 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 369 struct fb_info *info; 370 struct vc_data *vc = NULL; 371 int c; 372 bool enable; 373 int ret; 374 375 /* FIXME: we should sort out the unbind locking instead */ 376 /* instead we just fail to flash the cursor if we can't get 377 * the lock instead of blocking fbcon deinit */ 378 ret = console_trylock(); 379 if (ret == 0) 380 return; 381 382 /* protected by console_lock */ 383 info = ops->info; 384 385 if (ops->currcon != -1) 386 vc = vc_cons[ops->currcon].d; 387 388 if (!vc || !con_is_visible(vc) || 389 fbcon_info_from_console(vc->vc_num) != info || 390 vc->vc_deccm != 1) { 391 console_unlock(); 392 return; 393 } 394 395 c = scr_readw((u16 *) vc->vc_pos); 396 enable = ops->cursor_flash && !ops->cursor_state.enable; 397 ops->cursor(vc, info, enable, get_color(vc, info, c, 1), 398 get_color(vc, info, c, 0)); 399 console_unlock(); 400 401 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 402 ops->cur_blink_jiffies); 403 } 404 405 static void fbcon_add_cursor_work(struct fb_info *info) 406 { 407 struct fbcon_ops *ops = info->fbcon_par; 408 409 if (!fbcon_cursor_noblink) 410 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 411 ops->cur_blink_jiffies); 412 } 413 414 static void fbcon_del_cursor_work(struct fb_info *info) 415 { 416 struct fbcon_ops *ops = info->fbcon_par; 417 418 cancel_delayed_work_sync(&ops->cursor_work); 419 } 420 421 #ifndef MODULE 422 static int __init fb_console_setup(char *this_opt) 423 { 424 char *options; 425 int i, j; 426 427 if (!this_opt || !*this_opt) 428 return 1; 429 430 while ((options = strsep(&this_opt, ",")) != NULL) { 431 if (!strncmp(options, "font:", 5)) { 432 strscpy(fontname, options + 5, sizeof(fontname)); 433 continue; 434 } 435 436 if (!strncmp(options, "scrollback:", 11)) { 437 pr_warn("Ignoring scrollback size option\n"); 438 continue; 439 } 440 441 if (!strncmp(options, "map:", 4)) { 442 options += 4; 443 if (*options) { 444 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 445 if (!options[j]) 446 j = 0; 447 con2fb_map_boot[i] = 448 (options[j++]-'0') % FB_MAX; 449 } 450 451 fbcon_map_override(); 452 } 453 continue; 454 } 455 456 if (!strncmp(options, "vc:", 3)) { 457 options += 3; 458 if (*options) 459 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 460 if (first_fb_vc >= MAX_NR_CONSOLES) 461 first_fb_vc = 0; 462 if (*options++ == '-') 463 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 464 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 465 last_fb_vc = MAX_NR_CONSOLES - 1; 466 fbcon_is_default = 0; 467 continue; 468 } 469 470 if (!strncmp(options, "rotate:", 7)) { 471 options += 7; 472 if (*options) 473 initial_rotation = simple_strtoul(options, &options, 0); 474 if (initial_rotation > 3) 475 initial_rotation = 0; 476 continue; 477 } 478 479 if (!strncmp(options, "margin:", 7)) { 480 options += 7; 481 if (*options) 482 margin_color = simple_strtoul(options, &options, 0); 483 continue; 484 } 485 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 486 if (!strcmp(options, "nodefer")) { 487 deferred_takeover = false; 488 continue; 489 } 490 #endif 491 492 #ifdef CONFIG_LOGO 493 if (!strncmp(options, "logo-pos:", 9)) { 494 options += 9; 495 if (!strcmp(options, "center")) 496 fb_center_logo = true; 497 continue; 498 } 499 500 if (!strncmp(options, "logo-count:", 11)) { 501 options += 11; 502 if (*options) 503 fb_logo_count = simple_strtol(options, &options, 0); 504 continue; 505 } 506 #endif 507 } 508 return 1; 509 } 510 511 __setup("fbcon=", fb_console_setup); 512 #endif 513 514 static int search_fb_in_map(int idx) 515 { 516 int i, retval = 0; 517 518 for (i = first_fb_vc; i <= last_fb_vc; i++) { 519 if (con2fb_map[i] == idx) { 520 retval = 1; 521 break; 522 } 523 } 524 return retval; 525 } 526 527 static int search_for_mapped_con(void) 528 { 529 int i, retval = 0; 530 531 for (i = first_fb_vc; i <= last_fb_vc; i++) { 532 if (con2fb_map[i] != -1) { 533 retval = 1; 534 break; 535 } 536 } 537 return retval; 538 } 539 540 static int do_fbcon_takeover(int show_logo) 541 { 542 int err, i; 543 544 if (!fbcon_num_registered_fb) 545 return -ENODEV; 546 547 if (!show_logo) 548 logo_shown = FBCON_LOGO_DONTSHOW; 549 550 for (i = first_fb_vc; i <= last_fb_vc; i++) 551 con2fb_map[i] = info_idx; 552 553 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 554 fbcon_is_default); 555 556 if (err) { 557 for (i = first_fb_vc; i <= last_fb_vc; i++) 558 con2fb_map[i] = -1; 559 info_idx = -1; 560 } else { 561 fbcon_has_console_bind = 1; 562 } 563 564 return err; 565 } 566 567 #ifdef MODULE 568 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 569 int cols, int rows, int new_cols, int new_rows) 570 { 571 logo_shown = FBCON_LOGO_DONTSHOW; 572 } 573 #else 574 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 575 int cols, int rows, int new_cols, int new_rows) 576 { 577 /* Need to make room for the logo */ 578 struct fbcon_ops *ops = info->fbcon_par; 579 int cnt, erase = vc->vc_video_erase_char, step; 580 unsigned short *save = NULL, *r, *q; 581 int logo_height; 582 583 if (info->fbops->owner) { 584 logo_shown = FBCON_LOGO_DONTSHOW; 585 return; 586 } 587 588 /* 589 * remove underline attribute from erase character 590 * if black and white framebuffer. 591 */ 592 if (fb_get_color_depth(&info->var, &info->fix) == 1) 593 erase &= ~0x400; 594 logo_height = fb_prepare_logo(info, ops->rotate); 595 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 596 q = (unsigned short *) (vc->vc_origin + 597 vc->vc_size_row * rows); 598 step = logo_lines * cols; 599 for (r = q - logo_lines * cols; r < q; r++) 600 if (scr_readw(r) != vc->vc_video_erase_char) 601 break; 602 if (r != q && new_rows >= rows + logo_lines) { 603 save = kmalloc(array3_size(logo_lines, new_cols, 2), 604 GFP_KERNEL); 605 if (save) { 606 int i = min(cols, new_cols); 607 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 608 r = q - step; 609 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 610 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 611 r = q; 612 } 613 } 614 if (r == q) { 615 /* We can scroll screen down */ 616 r = q - step - cols; 617 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 618 scr_memcpyw(r + step, r, vc->vc_size_row); 619 r -= cols; 620 } 621 if (!save) { 622 int lines; 623 if (vc->state.y + logo_lines >= rows) 624 lines = rows - vc->state.y - 1; 625 else 626 lines = logo_lines; 627 vc->state.y += lines; 628 vc->vc_pos += lines * vc->vc_size_row; 629 } 630 } 631 scr_memsetw((unsigned short *) vc->vc_origin, 632 erase, 633 vc->vc_size_row * logo_lines); 634 635 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 636 fbcon_clear_margins(vc, 0); 637 update_screen(vc); 638 } 639 640 if (save) { 641 q = (unsigned short *) (vc->vc_origin + 642 vc->vc_size_row * 643 rows); 644 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 645 vc->state.y += logo_lines; 646 vc->vc_pos += logo_lines * vc->vc_size_row; 647 kfree(save); 648 } 649 650 if (logo_shown == FBCON_LOGO_DONTSHOW) 651 return; 652 653 if (logo_lines > vc->vc_bottom) { 654 logo_shown = FBCON_LOGO_CANSHOW; 655 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n"); 656 } else { 657 logo_shown = FBCON_LOGO_DRAW; 658 vc->vc_top = logo_lines; 659 } 660 } 661 #endif /* MODULE */ 662 663 #ifdef CONFIG_FB_TILEBLITTING 664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 665 { 666 struct fbcon_ops *ops = info->fbcon_par; 667 668 ops->p = &fb_display[vc->vc_num]; 669 670 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 671 fbcon_set_tileops(vc, info); 672 else { 673 fbcon_set_rotation(info); 674 fbcon_set_bitops(ops); 675 } 676 } 677 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 679 { 680 int err = 0; 681 682 if (info->flags & FBINFO_MISC_TILEBLITTING && 683 info->tileops->fb_get_tilemax(info) < charcount) 684 err = 1; 685 686 return err; 687 } 688 #else 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 690 { 691 struct fbcon_ops *ops = info->fbcon_par; 692 693 info->flags &= ~FBINFO_MISC_TILEBLITTING; 694 ops->p = &fb_display[vc->vc_num]; 695 fbcon_set_rotation(info); 696 fbcon_set_bitops(ops); 697 } 698 699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 700 { 701 return 0; 702 } 703 704 #endif /* CONFIG_MISC_TILEBLITTING */ 705 706 static void fbcon_release(struct fb_info *info) 707 { 708 lock_fb_info(info); 709 if (info->fbops->fb_release) 710 info->fbops->fb_release(info, 0); 711 unlock_fb_info(info); 712 713 module_put(info->fbops->owner); 714 715 if (info->fbcon_par) { 716 struct fbcon_ops *ops = info->fbcon_par; 717 718 fbcon_del_cursor_work(info); 719 kfree(ops->cursor_state.mask); 720 kfree(ops->cursor_data); 721 kfree(ops->cursor_src); 722 kfree(ops->fontbuffer); 723 kfree(info->fbcon_par); 724 info->fbcon_par = NULL; 725 } 726 } 727 728 static int fbcon_open(struct fb_info *info) 729 { 730 struct fbcon_ops *ops; 731 732 if (!try_module_get(info->fbops->owner)) 733 return -ENODEV; 734 735 lock_fb_info(info); 736 if (info->fbops->fb_open && 737 info->fbops->fb_open(info, 0)) { 738 unlock_fb_info(info); 739 module_put(info->fbops->owner); 740 return -ENODEV; 741 } 742 unlock_fb_info(info); 743 744 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 745 if (!ops) { 746 fbcon_release(info); 747 return -ENOMEM; 748 } 749 750 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 751 ops->info = info; 752 info->fbcon_par = ops; 753 ops->cur_blink_jiffies = HZ / 5; 754 755 return 0; 756 } 757 758 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 759 int unit) 760 { 761 int err; 762 763 err = fbcon_open(info); 764 if (err) 765 return err; 766 767 if (vc) 768 set_blitting_type(vc, info); 769 770 return err; 771 } 772 773 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 774 struct fb_info *newinfo) 775 { 776 int ret; 777 778 fbcon_release(oldinfo); 779 780 /* 781 If oldinfo and newinfo are driving the same hardware, 782 the fb_release() method of oldinfo may attempt to 783 restore the hardware state. This will leave the 784 newinfo in an undefined state. Thus, a call to 785 fb_set_par() may be needed for the newinfo. 786 */ 787 if (newinfo && newinfo->fbops->fb_set_par) { 788 ret = newinfo->fbops->fb_set_par(newinfo); 789 790 if (ret) 791 printk(KERN_ERR "con2fb_release_oldinfo: " 792 "detected unhandled fb_set_par error, " 793 "error code %d\n", ret); 794 } 795 } 796 797 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 798 int unit, int show_logo) 799 { 800 struct fbcon_ops *ops = info->fbcon_par; 801 int ret; 802 803 ops->currcon = fg_console; 804 805 if (info->fbops->fb_set_par && !ops->initialized) { 806 ret = info->fbops->fb_set_par(info); 807 808 if (ret) 809 printk(KERN_ERR "con2fb_init_display: detected " 810 "unhandled fb_set_par error, " 811 "error code %d\n", ret); 812 } 813 814 ops->initialized = true; 815 ops->graphics = 0; 816 fbcon_set_disp(info, &info->var, unit); 817 818 if (show_logo) { 819 struct vc_data *fg_vc = vc_cons[fg_console].d; 820 struct fb_info *fg_info = 821 fbcon_info_from_console(fg_console); 822 823 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 824 fg_vc->vc_rows, fg_vc->vc_cols, 825 fg_vc->vc_rows); 826 } 827 828 update_screen(vc_cons[fg_console].d); 829 } 830 831 /** 832 * set_con2fb_map - map console to frame buffer device 833 * @unit: virtual console number to map 834 * @newidx: frame buffer index to map virtual console to 835 * @user: user request 836 * 837 * Maps a virtual console @unit to a frame buffer device 838 * @newidx. 839 * 840 * This should be called with the console lock held. 841 */ 842 static int set_con2fb_map(int unit, int newidx, int user) 843 { 844 struct vc_data *vc = vc_cons[unit].d; 845 int oldidx = con2fb_map[unit]; 846 struct fb_info *info = fbcon_registered_fb[newidx]; 847 struct fb_info *oldinfo = NULL; 848 int err = 0, show_logo; 849 850 WARN_CONSOLE_UNLOCKED(); 851 852 if (oldidx == newidx) 853 return 0; 854 855 if (!info) 856 return -EINVAL; 857 858 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 859 info_idx = newidx; 860 return do_fbcon_takeover(0); 861 } 862 863 if (oldidx != -1) 864 oldinfo = fbcon_registered_fb[oldidx]; 865 866 if (!search_fb_in_map(newidx)) { 867 err = con2fb_acquire_newinfo(vc, info, unit); 868 if (err) 869 return err; 870 871 fbcon_add_cursor_work(info); 872 } else if (vc) { 873 set_blitting_type(vc, info); 874 } 875 876 con2fb_map[unit] = newidx; 877 878 /* 879 * If old fb is not mapped to any of the consoles, 880 * fbcon should release it. 881 */ 882 if (oldinfo && !search_fb_in_map(oldidx)) 883 con2fb_release_oldinfo(vc, oldinfo, info); 884 885 show_logo = (fg_console == 0 && !user && 886 logo_shown != FBCON_LOGO_DONTSHOW); 887 888 con2fb_map_boot[unit] = newidx; 889 con2fb_init_display(vc, info, unit, show_logo); 890 891 if (!search_fb_in_map(info_idx)) 892 info_idx = newidx; 893 894 return err; 895 } 896 897 /* 898 * Low Level Operations 899 */ 900 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 901 static int var_to_display(struct fbcon_display *disp, 902 struct fb_var_screeninfo *var, 903 struct fb_info *info) 904 { 905 disp->xres_virtual = var->xres_virtual; 906 disp->yres_virtual = var->yres_virtual; 907 disp->bits_per_pixel = var->bits_per_pixel; 908 disp->grayscale = var->grayscale; 909 disp->nonstd = var->nonstd; 910 disp->accel_flags = var->accel_flags; 911 disp->height = var->height; 912 disp->width = var->width; 913 disp->red = var->red; 914 disp->green = var->green; 915 disp->blue = var->blue; 916 disp->transp = var->transp; 917 disp->rotate = var->rotate; 918 disp->mode = fb_match_mode(var, &info->modelist); 919 if (disp->mode == NULL) 920 /* This should not happen */ 921 return -EINVAL; 922 return 0; 923 } 924 925 static void display_to_var(struct fb_var_screeninfo *var, 926 struct fbcon_display *disp) 927 { 928 fb_videomode_to_var(var, disp->mode); 929 var->xres_virtual = disp->xres_virtual; 930 var->yres_virtual = disp->yres_virtual; 931 var->bits_per_pixel = disp->bits_per_pixel; 932 var->grayscale = disp->grayscale; 933 var->nonstd = disp->nonstd; 934 var->accel_flags = disp->accel_flags; 935 var->height = disp->height; 936 var->width = disp->width; 937 var->red = disp->red; 938 var->green = disp->green; 939 var->blue = disp->blue; 940 var->transp = disp->transp; 941 var->rotate = disp->rotate; 942 } 943 944 static const char *fbcon_startup(void) 945 { 946 static const char display_desc[] = "frame buffer device"; 947 struct fbcon_display *p = &fb_display[fg_console]; 948 struct vc_data *vc = vc_cons[fg_console].d; 949 const struct font_desc *font = NULL; 950 struct fb_info *info = NULL; 951 struct fbcon_ops *ops; 952 int rows, cols; 953 954 /* 955 * If num_registered_fb is zero, this is a call for the dummy part. 956 * The frame buffer devices weren't initialized yet. 957 */ 958 if (!fbcon_num_registered_fb || info_idx == -1) 959 return display_desc; 960 /* 961 * Instead of blindly using registered_fb[0], we use info_idx, set by 962 * fbcon_fb_registered(); 963 */ 964 info = fbcon_registered_fb[info_idx]; 965 if (!info) 966 return NULL; 967 968 if (fbcon_open(info)) 969 return NULL; 970 971 ops = info->fbcon_par; 972 ops->currcon = -1; 973 ops->graphics = 1; 974 ops->cur_rotate = -1; 975 976 p->con_rotate = initial_rotation; 977 if (p->con_rotate == -1) 978 p->con_rotate = info->fbcon_rotate_hint; 979 if (p->con_rotate == -1) 980 p->con_rotate = FB_ROTATE_UR; 981 982 set_blitting_type(vc, info); 983 984 /* Setup default font */ 985 if (!p->fontdata) { 986 if (!fontname[0] || !(font = find_font(fontname))) 987 font = get_default_font(info->var.xres, 988 info->var.yres, 989 info->pixmap.blit_x, 990 info->pixmap.blit_y); 991 vc->vc_font.width = font->width; 992 vc->vc_font.height = font->height; 993 vc->vc_font.data = (void *)(p->fontdata = font->data); 994 vc->vc_font.charcount = font->charcount; 995 } 996 997 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 998 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 999 cols /= vc->vc_font.width; 1000 rows /= vc->vc_font.height; 1001 vc_resize(vc, cols, rows); 1002 1003 pr_debug("mode: %s\n", info->fix.id); 1004 pr_debug("visual: %d\n", info->fix.visual); 1005 pr_debug("res: %dx%d-%d\n", info->var.xres, 1006 info->var.yres, 1007 info->var.bits_per_pixel); 1008 1009 fbcon_add_cursor_work(info); 1010 return display_desc; 1011 } 1012 1013 static void fbcon_init(struct vc_data *vc, bool init) 1014 { 1015 struct fb_info *info; 1016 struct fbcon_ops *ops; 1017 struct vc_data **default_mode = vc->vc_display_fg; 1018 struct vc_data *svc = *default_mode; 1019 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1020 int logo = 1, new_rows, new_cols, rows, cols; 1021 int ret; 1022 1023 if (WARN_ON(info_idx == -1)) 1024 return; 1025 1026 if (con2fb_map[vc->vc_num] == -1) 1027 con2fb_map[vc->vc_num] = info_idx; 1028 1029 info = fbcon_info_from_console(vc->vc_num); 1030 1031 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1032 logo_shown = FBCON_LOGO_DONTSHOW; 1033 1034 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1035 (info->fix.type == FB_TYPE_TEXT)) 1036 logo = 0; 1037 1038 if (var_to_display(p, &info->var, info)) 1039 return; 1040 1041 if (!info->fbcon_par) 1042 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1043 1044 /* If we are not the first console on this 1045 fb, copy the font from that console */ 1046 t = &fb_display[fg_console]; 1047 if (!p->fontdata) { 1048 if (t->fontdata) { 1049 struct vc_data *fvc = vc_cons[fg_console].d; 1050 1051 vc->vc_font.data = (void *)(p->fontdata = 1052 fvc->vc_font.data); 1053 vc->vc_font.width = fvc->vc_font.width; 1054 vc->vc_font.height = fvc->vc_font.height; 1055 vc->vc_font.charcount = fvc->vc_font.charcount; 1056 p->userfont = t->userfont; 1057 1058 if (p->userfont) 1059 REFCOUNT(p->fontdata)++; 1060 } else { 1061 const struct font_desc *font = NULL; 1062 1063 if (!fontname[0] || !(font = find_font(fontname))) 1064 font = get_default_font(info->var.xres, 1065 info->var.yres, 1066 info->pixmap.blit_x, 1067 info->pixmap.blit_y); 1068 vc->vc_font.width = font->width; 1069 vc->vc_font.height = font->height; 1070 vc->vc_font.data = (void *)(p->fontdata = font->data); 1071 vc->vc_font.charcount = font->charcount; 1072 } 1073 } 1074 1075 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1076 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1077 if (vc->vc_font.charcount == 256) { 1078 vc->vc_hi_font_mask = 0; 1079 } else { 1080 vc->vc_hi_font_mask = 0x100; 1081 if (vc->vc_can_do_color) 1082 vc->vc_complement_mask <<= 1; 1083 } 1084 1085 if (!*svc->uni_pagedict_loc) 1086 con_set_default_unimap(svc); 1087 if (!*vc->uni_pagedict_loc) 1088 con_copy_unimap(vc, svc); 1089 1090 ops = info->fbcon_par; 1091 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1092 1093 p->con_rotate = initial_rotation; 1094 if (p->con_rotate == -1) 1095 p->con_rotate = info->fbcon_rotate_hint; 1096 if (p->con_rotate == -1) 1097 p->con_rotate = FB_ROTATE_UR; 1098 1099 set_blitting_type(vc, info); 1100 1101 cols = vc->vc_cols; 1102 rows = vc->vc_rows; 1103 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1104 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1105 new_cols /= vc->vc_font.width; 1106 new_rows /= vc->vc_font.height; 1107 1108 /* 1109 * We must always set the mode. The mode of the previous console 1110 * driver could be in the same resolution but we are using different 1111 * hardware so we have to initialize the hardware. 1112 * 1113 * We need to do it in fbcon_init() to prevent screen corruption. 1114 */ 1115 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1116 if (info->fbops->fb_set_par && !ops->initialized) { 1117 ret = info->fbops->fb_set_par(info); 1118 1119 if (ret) 1120 printk(KERN_ERR "fbcon_init: detected " 1121 "unhandled fb_set_par error, " 1122 "error code %d\n", ret); 1123 } 1124 1125 ops->initialized = true; 1126 } 1127 1128 ops->graphics = 0; 1129 1130 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1131 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1132 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1133 p->scrollmode = SCROLL_MOVE; 1134 else /* default to something safe */ 1135 p->scrollmode = SCROLL_REDRAW; 1136 #endif 1137 1138 /* 1139 * ++guenther: console.c:vc_allocate() relies on initializing 1140 * vc_{cols,rows}, but we must not set those if we are only 1141 * resizing the console. 1142 */ 1143 if (init) { 1144 vc->vc_cols = new_cols; 1145 vc->vc_rows = new_rows; 1146 } else 1147 vc_resize(vc, new_cols, new_rows); 1148 1149 if (logo) 1150 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1151 1152 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1153 ops->rotate = FB_ROTATE_UR; 1154 set_blitting_type(vc, info); 1155 } 1156 1157 ops->p = &fb_display[fg_console]; 1158 } 1159 1160 static void fbcon_free_font(struct fbcon_display *p) 1161 { 1162 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1163 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1164 p->fontdata = NULL; 1165 p->userfont = 0; 1166 } 1167 1168 static void set_vc_hi_font(struct vc_data *vc, bool set); 1169 1170 static void fbcon_release_all(void) 1171 { 1172 struct fb_info *info; 1173 int i, j, mapped; 1174 1175 fbcon_for_each_registered_fb(i) { 1176 mapped = 0; 1177 info = fbcon_registered_fb[i]; 1178 1179 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1180 if (con2fb_map[j] == i) { 1181 mapped = 1; 1182 con2fb_map[j] = -1; 1183 } 1184 } 1185 1186 if (mapped) 1187 fbcon_release(info); 1188 } 1189 } 1190 1191 static void fbcon_deinit(struct vc_data *vc) 1192 { 1193 struct fbcon_display *p = &fb_display[vc->vc_num]; 1194 struct fb_info *info; 1195 struct fbcon_ops *ops; 1196 int idx; 1197 1198 fbcon_free_font(p); 1199 idx = con2fb_map[vc->vc_num]; 1200 1201 if (idx == -1) 1202 goto finished; 1203 1204 info = fbcon_registered_fb[idx]; 1205 1206 if (!info) 1207 goto finished; 1208 1209 ops = info->fbcon_par; 1210 1211 if (!ops) 1212 goto finished; 1213 1214 if (con_is_visible(vc)) 1215 fbcon_del_cursor_work(info); 1216 1217 ops->initialized = false; 1218 finished: 1219 1220 fbcon_free_font(p); 1221 vc->vc_font.data = NULL; 1222 1223 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1224 set_vc_hi_font(vc, false); 1225 1226 if (!con_is_bound(&fb_con)) 1227 fbcon_release_all(); 1228 1229 if (vc->vc_num == logo_shown) 1230 logo_shown = FBCON_LOGO_CANSHOW; 1231 1232 return; 1233 } 1234 1235 /* ====================================================================== */ 1236 1237 /* fbcon_XXX routines - interface used by the world 1238 * 1239 * This system is now divided into two levels because of complications 1240 * caused by hardware scrolling. Top level functions: 1241 * 1242 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1243 * 1244 * handles y values in range [0, scr_height-1] that correspond to real 1245 * screen positions. y_wrap shift means that first line of bitmap may be 1246 * anywhere on this display. These functions convert lineoffsets to 1247 * bitmap offsets and deal with the wrap-around case by splitting blits. 1248 * 1249 * fbcon_bmove_physical_8() -- These functions fast implementations 1250 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1251 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1252 * 1253 * WARNING: 1254 * 1255 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1256 * Implies should only really hardware scroll in rows. Only reason for 1257 * restriction is simplicity & efficiency at the moment. 1258 */ 1259 1260 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1261 unsigned int height, unsigned int width) 1262 { 1263 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1264 struct fbcon_ops *ops = info->fbcon_par; 1265 int fg, bg; 1266 struct fbcon_display *p = &fb_display[vc->vc_num]; 1267 u_int y_break; 1268 1269 if (fbcon_is_inactive(vc, info)) 1270 return; 1271 1272 if (!height || !width) 1273 return; 1274 1275 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1276 vc->vc_top = 0; 1277 /* 1278 * If the font dimensions are not an integral of the display 1279 * dimensions then the ops->clear below won't end up clearing 1280 * the margins. Call clear_margins here in case the logo 1281 * bitmap stretched into the margin area. 1282 */ 1283 fbcon_clear_margins(vc, 0); 1284 } 1285 1286 fg = get_color(vc, info, vc->vc_video_erase_char, 1); 1287 bg = get_color(vc, info, vc->vc_video_erase_char, 0); 1288 /* Split blits that cross physical y_wrap boundary */ 1289 1290 y_break = p->vrows - p->yscroll; 1291 if (sy < y_break && sy + height - 1 >= y_break) { 1292 u_int b = y_break - sy; 1293 ops->clear(vc, info, real_y(p, sy), sx, b, width, fg, bg); 1294 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1295 width, fg, bg); 1296 } else 1297 ops->clear(vc, info, real_y(p, sy), sx, height, width, fg, bg); 1298 } 1299 1300 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1301 unsigned int width) 1302 { 1303 __fbcon_clear(vc, sy, sx, 1, width); 1304 } 1305 1306 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1307 unsigned int ypos, unsigned int xpos) 1308 { 1309 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1310 struct fbcon_display *p = &fb_display[vc->vc_num]; 1311 struct fbcon_ops *ops = info->fbcon_par; 1312 1313 if (!fbcon_is_inactive(vc, info)) 1314 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1315 get_color(vc, info, scr_readw(s), 1), 1316 get_color(vc, info, scr_readw(s), 0)); 1317 } 1318 1319 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1320 { 1321 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1322 struct fbcon_ops *ops = info->fbcon_par; 1323 1324 if (!fbcon_is_inactive(vc, info)) 1325 ops->clear_margins(vc, info, margin_color, bottom_only); 1326 } 1327 1328 static void fbcon_cursor(struct vc_data *vc, bool enable) 1329 { 1330 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1331 struct fbcon_ops *ops = info->fbcon_par; 1332 int c = scr_readw((u16 *) vc->vc_pos); 1333 1334 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1335 1336 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1337 return; 1338 1339 if (vc->vc_cursor_type & CUR_SW) 1340 fbcon_del_cursor_work(info); 1341 else 1342 fbcon_add_cursor_work(info); 1343 1344 ops->cursor_flash = enable; 1345 1346 if (!ops->cursor) 1347 return; 1348 1349 ops->cursor(vc, info, enable, get_color(vc, info, c, 1), 1350 get_color(vc, info, c, 0)); 1351 } 1352 1353 static int scrollback_phys_max = 0; 1354 static int scrollback_max = 0; 1355 static int scrollback_current = 0; 1356 1357 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1358 int unit) 1359 { 1360 struct fbcon_display *p, *t; 1361 struct vc_data **default_mode, *vc; 1362 struct vc_data *svc; 1363 struct fbcon_ops *ops = info->fbcon_par; 1364 int rows, cols; 1365 1366 p = &fb_display[unit]; 1367 1368 if (var_to_display(p, var, info)) 1369 return; 1370 1371 vc = vc_cons[unit].d; 1372 1373 if (!vc) 1374 return; 1375 1376 default_mode = vc->vc_display_fg; 1377 svc = *default_mode; 1378 t = &fb_display[svc->vc_num]; 1379 1380 if (!vc->vc_font.data) { 1381 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1382 vc->vc_font.width = (*default_mode)->vc_font.width; 1383 vc->vc_font.height = (*default_mode)->vc_font.height; 1384 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1385 p->userfont = t->userfont; 1386 if (p->userfont) 1387 REFCOUNT(p->fontdata)++; 1388 } 1389 1390 var->activate = FB_ACTIVATE_NOW; 1391 info->var.activate = var->activate; 1392 var->yoffset = info->var.yoffset; 1393 var->xoffset = info->var.xoffset; 1394 fb_set_var(info, var); 1395 ops->var = info->var; 1396 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1397 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1398 if (vc->vc_font.charcount == 256) { 1399 vc->vc_hi_font_mask = 0; 1400 } else { 1401 vc->vc_hi_font_mask = 0x100; 1402 if (vc->vc_can_do_color) 1403 vc->vc_complement_mask <<= 1; 1404 } 1405 1406 if (!*svc->uni_pagedict_loc) 1407 con_set_default_unimap(svc); 1408 if (!*vc->uni_pagedict_loc) 1409 con_copy_unimap(vc, svc); 1410 1411 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1412 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1413 cols /= vc->vc_font.width; 1414 rows /= vc->vc_font.height; 1415 vc_resize(vc, cols, rows); 1416 1417 if (con_is_visible(vc)) { 1418 update_screen(vc); 1419 } 1420 } 1421 1422 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1423 { 1424 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1425 struct fbcon_ops *ops = info->fbcon_par; 1426 struct fbcon_display *p = &fb_display[vc->vc_num]; 1427 1428 p->yscroll += count; 1429 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1430 p->yscroll -= p->vrows; 1431 ops->var.xoffset = 0; 1432 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1433 ops->var.vmode |= FB_VMODE_YWRAP; 1434 ops->update_start(info); 1435 scrollback_max += count; 1436 if (scrollback_max > scrollback_phys_max) 1437 scrollback_max = scrollback_phys_max; 1438 scrollback_current = 0; 1439 } 1440 1441 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1442 { 1443 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1444 struct fbcon_ops *ops = info->fbcon_par; 1445 struct fbcon_display *p = &fb_display[vc->vc_num]; 1446 1447 p->yscroll -= count; 1448 if (p->yscroll < 0) /* Deal with wrap */ 1449 p->yscroll += p->vrows; 1450 ops->var.xoffset = 0; 1451 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1452 ops->var.vmode |= FB_VMODE_YWRAP; 1453 ops->update_start(info); 1454 scrollback_max -= count; 1455 if (scrollback_max < 0) 1456 scrollback_max = 0; 1457 scrollback_current = 0; 1458 } 1459 1460 static __inline__ void ypan_up(struct vc_data *vc, int count) 1461 { 1462 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1463 struct fbcon_display *p = &fb_display[vc->vc_num]; 1464 struct fbcon_ops *ops = info->fbcon_par; 1465 1466 p->yscroll += count; 1467 if (p->yscroll > p->vrows - vc->vc_rows) { 1468 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1469 0, 0, 0, vc->vc_rows, vc->vc_cols); 1470 p->yscroll -= p->vrows - vc->vc_rows; 1471 } 1472 1473 ops->var.xoffset = 0; 1474 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1475 ops->var.vmode &= ~FB_VMODE_YWRAP; 1476 ops->update_start(info); 1477 fbcon_clear_margins(vc, 1); 1478 scrollback_max += count; 1479 if (scrollback_max > scrollback_phys_max) 1480 scrollback_max = scrollback_phys_max; 1481 scrollback_current = 0; 1482 } 1483 1484 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1485 { 1486 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1487 struct fbcon_ops *ops = info->fbcon_par; 1488 struct fbcon_display *p = &fb_display[vc->vc_num]; 1489 1490 p->yscroll += count; 1491 1492 if (p->yscroll > p->vrows - vc->vc_rows) { 1493 p->yscroll -= p->vrows - vc->vc_rows; 1494 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1495 } 1496 1497 ops->var.xoffset = 0; 1498 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1499 ops->var.vmode &= ~FB_VMODE_YWRAP; 1500 ops->update_start(info); 1501 fbcon_clear_margins(vc, 1); 1502 scrollback_max += count; 1503 if (scrollback_max > scrollback_phys_max) 1504 scrollback_max = scrollback_phys_max; 1505 scrollback_current = 0; 1506 } 1507 1508 static __inline__ void ypan_down(struct vc_data *vc, int count) 1509 { 1510 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1511 struct fbcon_display *p = &fb_display[vc->vc_num]; 1512 struct fbcon_ops *ops = info->fbcon_par; 1513 1514 p->yscroll -= count; 1515 if (p->yscroll < 0) { 1516 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1517 0, vc->vc_rows, vc->vc_cols); 1518 p->yscroll += p->vrows - vc->vc_rows; 1519 } 1520 1521 ops->var.xoffset = 0; 1522 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1523 ops->var.vmode &= ~FB_VMODE_YWRAP; 1524 ops->update_start(info); 1525 fbcon_clear_margins(vc, 1); 1526 scrollback_max -= count; 1527 if (scrollback_max < 0) 1528 scrollback_max = 0; 1529 scrollback_current = 0; 1530 } 1531 1532 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1533 { 1534 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1535 struct fbcon_ops *ops = info->fbcon_par; 1536 struct fbcon_display *p = &fb_display[vc->vc_num]; 1537 1538 p->yscroll -= count; 1539 1540 if (p->yscroll < 0) { 1541 p->yscroll += p->vrows - vc->vc_rows; 1542 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1543 } 1544 1545 ops->var.xoffset = 0; 1546 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1547 ops->var.vmode &= ~FB_VMODE_YWRAP; 1548 ops->update_start(info); 1549 fbcon_clear_margins(vc, 1); 1550 scrollback_max -= count; 1551 if (scrollback_max < 0) 1552 scrollback_max = 0; 1553 scrollback_current = 0; 1554 } 1555 1556 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1557 int line, int count, int dy) 1558 { 1559 unsigned short *s = (unsigned short *) 1560 (vc->vc_origin + vc->vc_size_row * line); 1561 1562 while (count--) { 1563 unsigned short *start = s; 1564 unsigned short *le = advance_row(s, 1); 1565 unsigned short c; 1566 int x = 0; 1567 unsigned short attr = 1; 1568 1569 do { 1570 c = scr_readw(s); 1571 if (attr != (c & 0xff00)) { 1572 attr = c & 0xff00; 1573 if (s > start) { 1574 fbcon_putcs(vc, start, s - start, 1575 dy, x); 1576 x += s - start; 1577 start = s; 1578 } 1579 } 1580 console_conditional_schedule(); 1581 s++; 1582 } while (s < le); 1583 if (s > start) 1584 fbcon_putcs(vc, start, s - start, dy, x); 1585 console_conditional_schedule(); 1586 dy++; 1587 } 1588 } 1589 1590 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1591 struct fbcon_display *p, int line, int count, int ycount) 1592 { 1593 int offset = ycount * vc->vc_cols; 1594 unsigned short *d = (unsigned short *) 1595 (vc->vc_origin + vc->vc_size_row * line); 1596 unsigned short *s = d + offset; 1597 struct fbcon_ops *ops = info->fbcon_par; 1598 1599 while (count--) { 1600 unsigned short *start = s; 1601 unsigned short *le = advance_row(s, 1); 1602 unsigned short c; 1603 int x = 0; 1604 1605 do { 1606 c = scr_readw(s); 1607 1608 if (c == scr_readw(d)) { 1609 if (s > start) { 1610 ops->bmove(vc, info, line + ycount, x, 1611 line, x, 1, s-start); 1612 x += s - start + 1; 1613 start = s + 1; 1614 } else { 1615 x++; 1616 start++; 1617 } 1618 } 1619 1620 scr_writew(c, d); 1621 console_conditional_schedule(); 1622 s++; 1623 d++; 1624 } while (s < le); 1625 if (s > start) 1626 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1627 s-start); 1628 console_conditional_schedule(); 1629 if (ycount > 0) 1630 line++; 1631 else { 1632 line--; 1633 /* NOTE: We subtract two lines from these pointers */ 1634 s -= vc->vc_size_row; 1635 d -= vc->vc_size_row; 1636 } 1637 } 1638 } 1639 1640 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1641 { 1642 unsigned short *d = (unsigned short *) 1643 (vc->vc_origin + vc->vc_size_row * line); 1644 unsigned short *s = d + offset; 1645 1646 while (count--) { 1647 unsigned short *start = s; 1648 unsigned short *le = advance_row(s, 1); 1649 unsigned short c; 1650 int x = 0; 1651 unsigned short attr = 1; 1652 1653 do { 1654 c = scr_readw(s); 1655 if (attr != (c & 0xff00)) { 1656 attr = c & 0xff00; 1657 if (s > start) { 1658 fbcon_putcs(vc, start, s - start, 1659 line, x); 1660 x += s - start; 1661 start = s; 1662 } 1663 } 1664 if (c == scr_readw(d)) { 1665 if (s > start) { 1666 fbcon_putcs(vc, start, s - start, 1667 line, x); 1668 x += s - start + 1; 1669 start = s + 1; 1670 } else { 1671 x++; 1672 start++; 1673 } 1674 } 1675 scr_writew(c, d); 1676 console_conditional_schedule(); 1677 s++; 1678 d++; 1679 } while (s < le); 1680 if (s > start) 1681 fbcon_putcs(vc, start, s - start, line, x); 1682 console_conditional_schedule(); 1683 if (offset > 0) 1684 line++; 1685 else { 1686 line--; 1687 /* NOTE: We subtract two lines from these pointers */ 1688 s -= vc->vc_size_row; 1689 d -= vc->vc_size_row; 1690 } 1691 } 1692 } 1693 1694 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1695 int dy, int dx, int height, int width, u_int y_break) 1696 { 1697 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1698 struct fbcon_ops *ops = info->fbcon_par; 1699 u_int b; 1700 1701 if (sy < y_break && sy + height > y_break) { 1702 b = y_break - sy; 1703 if (dy < sy) { /* Avoid trashing self */ 1704 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1705 y_break); 1706 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1707 height - b, width, y_break); 1708 } else { 1709 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1710 height - b, width, y_break); 1711 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1712 y_break); 1713 } 1714 return; 1715 } 1716 1717 if (dy < y_break && dy + height > y_break) { 1718 b = y_break - dy; 1719 if (dy < sy) { /* Avoid trashing self */ 1720 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1721 y_break); 1722 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1723 height - b, width, y_break); 1724 } else { 1725 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1726 height - b, width, y_break); 1727 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1728 y_break); 1729 } 1730 return; 1731 } 1732 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1733 height, width); 1734 } 1735 1736 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1737 int height, int width) 1738 { 1739 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1740 struct fbcon_display *p = &fb_display[vc->vc_num]; 1741 1742 if (fbcon_is_inactive(vc, info)) 1743 return; 1744 1745 if (!width || !height) 1746 return; 1747 1748 /* Split blits that cross physical y_wrap case. 1749 * Pathological case involves 4 blits, better to use recursive 1750 * code rather than unrolled case 1751 * 1752 * Recursive invocations don't need to erase the cursor over and 1753 * over again, so we use fbcon_bmove_rec() 1754 */ 1755 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1756 p->vrows - p->yscroll); 1757 } 1758 1759 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1760 enum con_scroll dir, unsigned int count) 1761 { 1762 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1763 struct fbcon_display *p = &fb_display[vc->vc_num]; 1764 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1765 1766 if (fbcon_is_inactive(vc, info)) 1767 return true; 1768 1769 fbcon_cursor(vc, false); 1770 1771 /* 1772 * ++Geert: Only use ywrap/ypan if the console is in text mode 1773 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1774 * whole screen (prevents flicker). 1775 */ 1776 1777 switch (dir) { 1778 case SM_UP: 1779 if (count > vc->vc_rows) /* Maximum realistic size */ 1780 count = vc->vc_rows; 1781 switch (fb_scrollmode(p)) { 1782 case SCROLL_MOVE: 1783 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1784 count); 1785 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1786 scr_memsetw((unsigned short *) (vc->vc_origin + 1787 vc->vc_size_row * 1788 (b - count)), 1789 vc->vc_video_erase_char, 1790 vc->vc_size_row * count); 1791 return true; 1792 1793 case SCROLL_WRAP_MOVE: 1794 if (b - t - count > 3 * vc->vc_rows >> 2) { 1795 if (t > 0) 1796 fbcon_bmove(vc, 0, 0, count, 0, t, 1797 vc->vc_cols); 1798 ywrap_up(vc, count); 1799 if (vc->vc_rows - b > 0) 1800 fbcon_bmove(vc, b - count, 0, b, 0, 1801 vc->vc_rows - b, 1802 vc->vc_cols); 1803 } else if (info->flags & FBINFO_READS_FAST) 1804 fbcon_bmove(vc, t + count, 0, t, 0, 1805 b - t - count, vc->vc_cols); 1806 else 1807 goto redraw_up; 1808 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1809 break; 1810 1811 case SCROLL_PAN_REDRAW: 1812 if ((p->yscroll + count <= 1813 2 * (p->vrows - vc->vc_rows)) 1814 && ((!scroll_partial && (b - t == vc->vc_rows)) 1815 || (scroll_partial 1816 && (b - t - count > 1817 3 * vc->vc_rows >> 2)))) { 1818 if (t > 0) 1819 fbcon_redraw_move(vc, p, 0, t, count); 1820 ypan_up_redraw(vc, t, count); 1821 if (vc->vc_rows - b > 0) 1822 fbcon_redraw_move(vc, p, b, 1823 vc->vc_rows - b, b); 1824 } else 1825 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1826 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1827 break; 1828 1829 case SCROLL_PAN_MOVE: 1830 if ((p->yscroll + count <= 1831 2 * (p->vrows - vc->vc_rows)) 1832 && ((!scroll_partial && (b - t == vc->vc_rows)) 1833 || (scroll_partial 1834 && (b - t - count > 1835 3 * vc->vc_rows >> 2)))) { 1836 if (t > 0) 1837 fbcon_bmove(vc, 0, 0, count, 0, t, 1838 vc->vc_cols); 1839 ypan_up(vc, count); 1840 if (vc->vc_rows - b > 0) 1841 fbcon_bmove(vc, b - count, 0, b, 0, 1842 vc->vc_rows - b, 1843 vc->vc_cols); 1844 } else if (info->flags & FBINFO_READS_FAST) 1845 fbcon_bmove(vc, t + count, 0, t, 0, 1846 b - t - count, vc->vc_cols); 1847 else 1848 goto redraw_up; 1849 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1850 break; 1851 1852 case SCROLL_REDRAW: 1853 redraw_up: 1854 fbcon_redraw(vc, t, b - t - count, 1855 count * vc->vc_cols); 1856 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1857 scr_memsetw((unsigned short *) (vc->vc_origin + 1858 vc->vc_size_row * 1859 (b - count)), 1860 vc->vc_video_erase_char, 1861 vc->vc_size_row * count); 1862 return true; 1863 } 1864 break; 1865 1866 case SM_DOWN: 1867 if (count > vc->vc_rows) /* Maximum realistic size */ 1868 count = vc->vc_rows; 1869 switch (fb_scrollmode(p)) { 1870 case SCROLL_MOVE: 1871 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1872 -count); 1873 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1874 scr_memsetw((unsigned short *) (vc->vc_origin + 1875 vc->vc_size_row * 1876 t), 1877 vc->vc_video_erase_char, 1878 vc->vc_size_row * count); 1879 return true; 1880 1881 case SCROLL_WRAP_MOVE: 1882 if (b - t - count > 3 * vc->vc_rows >> 2) { 1883 if (vc->vc_rows - b > 0) 1884 fbcon_bmove(vc, b, 0, b - count, 0, 1885 vc->vc_rows - b, 1886 vc->vc_cols); 1887 ywrap_down(vc, count); 1888 if (t > 0) 1889 fbcon_bmove(vc, count, 0, 0, 0, t, 1890 vc->vc_cols); 1891 } else if (info->flags & FBINFO_READS_FAST) 1892 fbcon_bmove(vc, t, 0, t + count, 0, 1893 b - t - count, vc->vc_cols); 1894 else 1895 goto redraw_down; 1896 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1897 break; 1898 1899 case SCROLL_PAN_MOVE: 1900 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1901 && ((!scroll_partial && (b - t == vc->vc_rows)) 1902 || (scroll_partial 1903 && (b - t - count > 1904 3 * vc->vc_rows >> 2)))) { 1905 if (vc->vc_rows - b > 0) 1906 fbcon_bmove(vc, b, 0, b - count, 0, 1907 vc->vc_rows - b, 1908 vc->vc_cols); 1909 ypan_down(vc, count); 1910 if (t > 0) 1911 fbcon_bmove(vc, count, 0, 0, 0, t, 1912 vc->vc_cols); 1913 } else if (info->flags & FBINFO_READS_FAST) 1914 fbcon_bmove(vc, t, 0, t + count, 0, 1915 b - t - count, vc->vc_cols); 1916 else 1917 goto redraw_down; 1918 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1919 break; 1920 1921 case SCROLL_PAN_REDRAW: 1922 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1923 && ((!scroll_partial && (b - t == vc->vc_rows)) 1924 || (scroll_partial 1925 && (b - t - count > 1926 3 * vc->vc_rows >> 2)))) { 1927 if (vc->vc_rows - b > 0) 1928 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1929 b - count); 1930 ypan_down_redraw(vc, t, count); 1931 if (t > 0) 1932 fbcon_redraw_move(vc, p, count, t, 0); 1933 } else 1934 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1935 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1936 break; 1937 1938 case SCROLL_REDRAW: 1939 redraw_down: 1940 fbcon_redraw(vc, b - 1, b - t - count, 1941 -count * vc->vc_cols); 1942 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1943 scr_memsetw((unsigned short *) (vc->vc_origin + 1944 vc->vc_size_row * 1945 t), 1946 vc->vc_video_erase_char, 1947 vc->vc_size_row * count); 1948 return true; 1949 } 1950 } 1951 return false; 1952 } 1953 1954 1955 static void updatescrollmode_accel(struct fbcon_display *p, 1956 struct fb_info *info, 1957 struct vc_data *vc) 1958 { 1959 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1960 struct fbcon_ops *ops = info->fbcon_par; 1961 int cap = info->flags; 1962 u16 t = 0; 1963 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1964 info->fix.xpanstep); 1965 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1966 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1967 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1968 info->var.xres_virtual); 1969 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1970 divides(ypan, vc->vc_font.height) && vyres > yres; 1971 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1972 divides(ywrap, vc->vc_font.height) && 1973 divides(vc->vc_font.height, vyres) && 1974 divides(vc->vc_font.height, yres); 1975 int reading_fast = cap & FBINFO_READS_FAST; 1976 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1977 !(cap & FBINFO_HWACCEL_DISABLED); 1978 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1979 !(cap & FBINFO_HWACCEL_DISABLED); 1980 1981 if (good_wrap || good_pan) { 1982 if (reading_fast || fast_copyarea) 1983 p->scrollmode = good_wrap ? 1984 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1985 else 1986 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1987 SCROLL_PAN_REDRAW; 1988 } else { 1989 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1990 p->scrollmode = SCROLL_MOVE; 1991 else 1992 p->scrollmode = SCROLL_REDRAW; 1993 } 1994 #endif 1995 } 1996 1997 static void updatescrollmode(struct fbcon_display *p, 1998 struct fb_info *info, 1999 struct vc_data *vc) 2000 { 2001 struct fbcon_ops *ops = info->fbcon_par; 2002 int fh = vc->vc_font.height; 2003 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2004 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 2005 info->var.xres_virtual); 2006 2007 p->vrows = vyres/fh; 2008 if (yres > (fh * (vc->vc_rows + 1))) 2009 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 2010 if ((yres % fh) && (vyres % fh < yres % fh)) 2011 p->vrows--; 2012 2013 /* update scrollmode in case hardware acceleration is used */ 2014 updatescrollmode_accel(p, info, vc); 2015 } 2016 2017 #define PITCH(w) (((w) + 7) >> 3) 2018 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2019 2020 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2021 unsigned int height, bool from_user) 2022 { 2023 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2024 struct fbcon_ops *ops = info->fbcon_par; 2025 struct fbcon_display *p = &fb_display[vc->vc_num]; 2026 struct fb_var_screeninfo var = info->var; 2027 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2028 2029 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2030 int size; 2031 int pitch = PITCH(vc->vc_font.width); 2032 2033 /* 2034 * If user font, ensure that a possible change to user font 2035 * height or width will not allow a font data out-of-bounds access. 2036 * NOTE: must use original charcount in calculation as font 2037 * charcount can change and cannot be used to determine the 2038 * font data allocated size. 2039 */ 2040 if (pitch <= 0) 2041 return -EINVAL; 2042 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2043 if (size > FNTSIZE(vc->vc_font.data)) 2044 return -EINVAL; 2045 } 2046 2047 virt_w = FBCON_SWAP(ops->rotate, width, height); 2048 virt_h = FBCON_SWAP(ops->rotate, height, width); 2049 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2050 vc->vc_font.height); 2051 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2052 vc->vc_font.width); 2053 var.xres = virt_w * virt_fw; 2054 var.yres = virt_h * virt_fh; 2055 x_diff = info->var.xres - var.xres; 2056 y_diff = info->var.yres - var.yres; 2057 if (x_diff < 0 || x_diff > virt_fw || 2058 y_diff < 0 || y_diff > virt_fh) { 2059 const struct fb_videomode *mode; 2060 2061 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2062 mode = fb_find_best_mode(&var, &info->modelist); 2063 if (mode == NULL) 2064 return -EINVAL; 2065 display_to_var(&var, p); 2066 fb_videomode_to_var(&var, mode); 2067 2068 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2069 return -EINVAL; 2070 2071 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2072 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2073 var.activate = FB_ACTIVATE_NOW | 2074 FB_ACTIVATE_FORCE; 2075 fb_set_var(info, &var); 2076 } 2077 var_to_display(p, &info->var, info); 2078 ops->var = info->var; 2079 } 2080 updatescrollmode(p, info, vc); 2081 return 0; 2082 } 2083 2084 static bool fbcon_switch(struct vc_data *vc) 2085 { 2086 struct fb_info *info, *old_info = NULL; 2087 struct fbcon_ops *ops; 2088 struct fbcon_display *p = &fb_display[vc->vc_num]; 2089 struct fb_var_screeninfo var; 2090 int i, ret, prev_console; 2091 2092 info = fbcon_info_from_console(vc->vc_num); 2093 ops = info->fbcon_par; 2094 2095 if (logo_shown >= 0) { 2096 struct vc_data *conp2 = vc_cons[logo_shown].d; 2097 2098 if (conp2->vc_top == logo_lines 2099 && conp2->vc_bottom == conp2->vc_rows) 2100 conp2->vc_top = 0; 2101 logo_shown = FBCON_LOGO_CANSHOW; 2102 } 2103 2104 prev_console = ops->currcon; 2105 if (prev_console != -1) 2106 old_info = fbcon_info_from_console(prev_console); 2107 /* 2108 * FIXME: If we have multiple fbdev's loaded, we need to 2109 * update all info->currcon. Perhaps, we can place this 2110 * in a centralized structure, but this might break some 2111 * drivers. 2112 * 2113 * info->currcon = vc->vc_num; 2114 */ 2115 fbcon_for_each_registered_fb(i) { 2116 if (fbcon_registered_fb[i]->fbcon_par) { 2117 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2118 2119 o->currcon = vc->vc_num; 2120 } 2121 } 2122 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2123 display_to_var(&var, p); 2124 var.activate = FB_ACTIVATE_NOW; 2125 2126 /* 2127 * make sure we don't unnecessarily trip the memcmp() 2128 * in fb_set_var() 2129 */ 2130 info->var.activate = var.activate; 2131 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2132 fb_set_var(info, &var); 2133 ops->var = info->var; 2134 2135 if (old_info != NULL && (old_info != info || 2136 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2137 if (info->fbops->fb_set_par) { 2138 ret = info->fbops->fb_set_par(info); 2139 2140 if (ret) 2141 printk(KERN_ERR "fbcon_switch: detected " 2142 "unhandled fb_set_par error, " 2143 "error code %d\n", ret); 2144 } 2145 2146 if (old_info != info) 2147 fbcon_del_cursor_work(old_info); 2148 } 2149 2150 if (fbcon_is_inactive(vc, info) || 2151 ops->blank_state != FB_BLANK_UNBLANK) 2152 fbcon_del_cursor_work(info); 2153 else 2154 fbcon_add_cursor_work(info); 2155 2156 set_blitting_type(vc, info); 2157 ops->cursor_reset = 1; 2158 2159 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2160 ops->rotate = FB_ROTATE_UR; 2161 set_blitting_type(vc, info); 2162 } 2163 2164 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2165 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2166 2167 if (vc->vc_font.charcount > 256) 2168 vc->vc_complement_mask <<= 1; 2169 2170 updatescrollmode(p, info, vc); 2171 2172 switch (fb_scrollmode(p)) { 2173 case SCROLL_WRAP_MOVE: 2174 scrollback_phys_max = p->vrows - vc->vc_rows; 2175 break; 2176 case SCROLL_PAN_MOVE: 2177 case SCROLL_PAN_REDRAW: 2178 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2179 if (scrollback_phys_max < 0) 2180 scrollback_phys_max = 0; 2181 break; 2182 default: 2183 scrollback_phys_max = 0; 2184 break; 2185 } 2186 2187 scrollback_max = 0; 2188 scrollback_current = 0; 2189 2190 if (!fbcon_is_inactive(vc, info)) { 2191 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2192 ops->update_start(info); 2193 } 2194 2195 fbcon_set_palette(vc, color_table); 2196 fbcon_clear_margins(vc, 0); 2197 2198 if (logo_shown == FBCON_LOGO_DRAW) { 2199 2200 logo_shown = fg_console; 2201 fb_show_logo(info, ops->rotate); 2202 update_region(vc, 2203 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2204 vc->vc_size_row * (vc->vc_bottom - 2205 vc->vc_top) / 2); 2206 return false; 2207 } 2208 return true; 2209 } 2210 2211 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2212 int blank) 2213 { 2214 if (blank) { 2215 unsigned short charmask = vc->vc_hi_font_mask ? 2216 0x1ff : 0xff; 2217 unsigned short oldc; 2218 2219 oldc = vc->vc_video_erase_char; 2220 vc->vc_video_erase_char &= charmask; 2221 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2222 vc->vc_video_erase_char = oldc; 2223 } 2224 } 2225 2226 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2227 bool mode_switch) 2228 { 2229 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2230 struct fbcon_ops *ops = info->fbcon_par; 2231 2232 if (mode_switch) { 2233 struct fb_var_screeninfo var = info->var; 2234 2235 ops->graphics = 1; 2236 2237 if (!blank) { 2238 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2239 FB_ACTIVATE_KD_TEXT; 2240 fb_set_var(info, &var); 2241 ops->graphics = 0; 2242 ops->var = info->var; 2243 } 2244 } 2245 2246 if (!fbcon_is_inactive(vc, info)) { 2247 if (ops->blank_state != blank) { 2248 ops->blank_state = blank; 2249 fbcon_cursor(vc, !blank); 2250 ops->cursor_flash = (!blank); 2251 2252 if (fb_blank(info, blank)) 2253 fbcon_generic_blank(vc, info, blank); 2254 } 2255 2256 if (!blank) 2257 update_screen(vc); 2258 } 2259 2260 if (mode_switch || fbcon_is_inactive(vc, info) || 2261 ops->blank_state != FB_BLANK_UNBLANK) 2262 fbcon_del_cursor_work(info); 2263 else 2264 fbcon_add_cursor_work(info); 2265 2266 return false; 2267 } 2268 2269 static void fbcon_debug_enter(struct vc_data *vc) 2270 { 2271 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2272 struct fbcon_ops *ops = info->fbcon_par; 2273 2274 ops->save_graphics = ops->graphics; 2275 ops->graphics = 0; 2276 if (info->fbops->fb_debug_enter) 2277 info->fbops->fb_debug_enter(info); 2278 fbcon_set_palette(vc, color_table); 2279 } 2280 2281 static void fbcon_debug_leave(struct vc_data *vc) 2282 { 2283 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2284 struct fbcon_ops *ops = info->fbcon_par; 2285 2286 ops->graphics = ops->save_graphics; 2287 if (info->fbops->fb_debug_leave) 2288 info->fbops->fb_debug_leave(info); 2289 } 2290 2291 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2292 { 2293 u8 *fontdata = vc->vc_font.data; 2294 u8 *data = font->data; 2295 int i, j; 2296 2297 font->width = vc->vc_font.width; 2298 font->height = vc->vc_font.height; 2299 if (font->height > vpitch) 2300 return -ENOSPC; 2301 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2302 if (!font->data) 2303 return 0; 2304 2305 if (font->width <= 8) { 2306 j = vc->vc_font.height; 2307 if (font->charcount * j > FNTSIZE(fontdata)) 2308 return -EINVAL; 2309 2310 for (i = 0; i < font->charcount; i++) { 2311 memcpy(data, fontdata, j); 2312 memset(data + j, 0, vpitch - j); 2313 data += vpitch; 2314 fontdata += j; 2315 } 2316 } else if (font->width <= 16) { 2317 j = vc->vc_font.height * 2; 2318 if (font->charcount * j > FNTSIZE(fontdata)) 2319 return -EINVAL; 2320 2321 for (i = 0; i < font->charcount; i++) { 2322 memcpy(data, fontdata, j); 2323 memset(data + j, 0, 2*vpitch - j); 2324 data += 2*vpitch; 2325 fontdata += j; 2326 } 2327 } else if (font->width <= 24) { 2328 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2329 return -EINVAL; 2330 2331 for (i = 0; i < font->charcount; i++) { 2332 for (j = 0; j < vc->vc_font.height; j++) { 2333 *data++ = fontdata[0]; 2334 *data++ = fontdata[1]; 2335 *data++ = fontdata[2]; 2336 fontdata += sizeof(u32); 2337 } 2338 memset(data, 0, 3 * (vpitch - j)); 2339 data += 3 * (vpitch - j); 2340 } 2341 } else { 2342 j = vc->vc_font.height * 4; 2343 if (font->charcount * j > FNTSIZE(fontdata)) 2344 return -EINVAL; 2345 2346 for (i = 0; i < font->charcount; i++) { 2347 memcpy(data, fontdata, j); 2348 memset(data + j, 0, 4 * vpitch - j); 2349 data += 4 * vpitch; 2350 fontdata += j; 2351 } 2352 } 2353 return 0; 2354 } 2355 2356 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2357 static void set_vc_hi_font(struct vc_data *vc, bool set) 2358 { 2359 if (!set) { 2360 vc->vc_hi_font_mask = 0; 2361 if (vc->vc_can_do_color) { 2362 vc->vc_complement_mask >>= 1; 2363 vc->vc_s_complement_mask >>= 1; 2364 } 2365 2366 /* ++Edmund: reorder the attribute bits */ 2367 if (vc->vc_can_do_color) { 2368 unsigned short *cp = 2369 (unsigned short *) vc->vc_origin; 2370 int count = vc->vc_screenbuf_size / 2; 2371 unsigned short c; 2372 for (; count > 0; count--, cp++) { 2373 c = scr_readw(cp); 2374 scr_writew(((c & 0xfe00) >> 1) | 2375 (c & 0xff), cp); 2376 } 2377 c = vc->vc_video_erase_char; 2378 vc->vc_video_erase_char = 2379 ((c & 0xfe00) >> 1) | (c & 0xff); 2380 vc->vc_attr >>= 1; 2381 } 2382 } else { 2383 vc->vc_hi_font_mask = 0x100; 2384 if (vc->vc_can_do_color) { 2385 vc->vc_complement_mask <<= 1; 2386 vc->vc_s_complement_mask <<= 1; 2387 } 2388 2389 /* ++Edmund: reorder the attribute bits */ 2390 { 2391 unsigned short *cp = 2392 (unsigned short *) vc->vc_origin; 2393 int count = vc->vc_screenbuf_size / 2; 2394 unsigned short c; 2395 for (; count > 0; count--, cp++) { 2396 unsigned short newc; 2397 c = scr_readw(cp); 2398 if (vc->vc_can_do_color) 2399 newc = 2400 ((c & 0xff00) << 1) | (c & 2401 0xff); 2402 else 2403 newc = c & ~0x100; 2404 scr_writew(newc, cp); 2405 } 2406 c = vc->vc_video_erase_char; 2407 if (vc->vc_can_do_color) { 2408 vc->vc_video_erase_char = 2409 ((c & 0xff00) << 1) | (c & 0xff); 2410 vc->vc_attr <<= 1; 2411 } else 2412 vc->vc_video_erase_char = c & ~0x100; 2413 } 2414 } 2415 } 2416 2417 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2418 const u8 * data, int userfont) 2419 { 2420 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2421 struct fbcon_ops *ops = info->fbcon_par; 2422 struct fbcon_display *p = &fb_display[vc->vc_num]; 2423 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2424 u8 *old_data = vc->vc_font.data; 2425 2426 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2427 vc->vc_font.data = (void *)(p->fontdata = data); 2428 old_userfont = p->userfont; 2429 if ((p->userfont = userfont)) 2430 REFCOUNT(data)++; 2431 2432 old_width = vc->vc_font.width; 2433 old_height = vc->vc_font.height; 2434 old_charcount = vc->vc_font.charcount; 2435 2436 vc->vc_font.width = w; 2437 vc->vc_font.height = h; 2438 vc->vc_font.charcount = charcount; 2439 if (vc->vc_hi_font_mask && charcount == 256) 2440 set_vc_hi_font(vc, false); 2441 else if (!vc->vc_hi_font_mask && charcount == 512) 2442 set_vc_hi_font(vc, true); 2443 2444 if (resize) { 2445 int cols, rows; 2446 2447 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2448 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2449 cols /= w; 2450 rows /= h; 2451 ret = vc_resize(vc, cols, rows); 2452 if (ret) 2453 goto err_out; 2454 } else if (con_is_visible(vc) 2455 && vc->vc_mode == KD_TEXT) { 2456 fbcon_clear_margins(vc, 0); 2457 update_screen(vc); 2458 } 2459 2460 if (old_userfont && (--REFCOUNT(old_data) == 0)) 2461 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2462 return 0; 2463 2464 err_out: 2465 p->fontdata = old_data; 2466 vc->vc_font.data = old_data; 2467 2468 if (userfont) { 2469 p->userfont = old_userfont; 2470 if (--REFCOUNT(data) == 0) 2471 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2472 } 2473 2474 vc->vc_font.width = old_width; 2475 vc->vc_font.height = old_height; 2476 vc->vc_font.charcount = old_charcount; 2477 2478 return ret; 2479 } 2480 2481 /* 2482 * User asked to set font; we are guaranteed that charcount does not exceed 512 2483 * but lets not assume that, since charcount of 512 is small for unicode support. 2484 */ 2485 2486 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2487 unsigned int vpitch, unsigned int flags) 2488 { 2489 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2490 unsigned charcount = font->charcount; 2491 int w = font->width; 2492 int h = font->height; 2493 int size; 2494 int i, csum; 2495 u8 *new_data, *data = font->data; 2496 int pitch = PITCH(font->width); 2497 2498 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2499 * If not this check should be changed to charcount < 256 */ 2500 if (charcount != 256 && charcount != 512) 2501 return -EINVAL; 2502 2503 /* font bigger than screen resolution ? */ 2504 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2505 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2506 return -EINVAL; 2507 2508 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT) 2509 return -EINVAL; 2510 2511 /* Make sure drawing engine can handle the font */ 2512 if (!test_bit(font->width - 1, info->pixmap.blit_x) || 2513 !test_bit(font->height - 1, info->pixmap.blit_y)) 2514 return -EINVAL; 2515 2516 /* Make sure driver can handle the font length */ 2517 if (fbcon_invalid_charcount(info, charcount)) 2518 return -EINVAL; 2519 2520 size = CALC_FONTSZ(h, pitch, charcount); 2521 2522 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2523 2524 if (!new_data) 2525 return -ENOMEM; 2526 2527 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2528 2529 new_data += FONT_EXTRA_WORDS * sizeof(int); 2530 FNTSIZE(new_data) = size; 2531 REFCOUNT(new_data) = 0; /* usage counter */ 2532 for (i=0; i< charcount; i++) { 2533 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2534 } 2535 2536 /* Since linux has a nice crc32 function use it for counting font 2537 * checksums. */ 2538 csum = crc32(0, new_data, size); 2539 2540 FNTSUM(new_data) = csum; 2541 /* Check if the same font is on some other console already */ 2542 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2543 struct vc_data *tmp = vc_cons[i].d; 2544 2545 if (fb_display[i].userfont && 2546 fb_display[i].fontdata && 2547 FNTSUM(fb_display[i].fontdata) == csum && 2548 FNTSIZE(fb_display[i].fontdata) == size && 2549 tmp->vc_font.width == w && 2550 !memcmp(fb_display[i].fontdata, new_data, size)) { 2551 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2552 new_data = (u8 *)fb_display[i].fontdata; 2553 break; 2554 } 2555 } 2556 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2557 } 2558 2559 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2560 const char *name) 2561 { 2562 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2563 const struct font_desc *f; 2564 2565 if (!name) 2566 f = get_default_font(info->var.xres, info->var.yres, 2567 info->pixmap.blit_x, info->pixmap.blit_y); 2568 else if (!(f = find_font(name))) 2569 return -ENOENT; 2570 2571 font->width = f->width; 2572 font->height = f->height; 2573 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2574 } 2575 2576 static u16 palette_red[16]; 2577 static u16 palette_green[16]; 2578 static u16 palette_blue[16]; 2579 2580 static struct fb_cmap palette_cmap = { 2581 0, 16, palette_red, palette_green, palette_blue, NULL 2582 }; 2583 2584 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2585 { 2586 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2587 int i, j, k, depth; 2588 u8 val; 2589 2590 if (fbcon_is_inactive(vc, info)) 2591 return; 2592 2593 if (!con_is_visible(vc)) 2594 return; 2595 2596 depth = fb_get_color_depth(&info->var, &info->fix); 2597 if (depth > 3) { 2598 for (i = j = 0; i < 16; i++) { 2599 k = table[i]; 2600 val = vc->vc_palette[j++]; 2601 palette_red[k] = (val << 8) | val; 2602 val = vc->vc_palette[j++]; 2603 palette_green[k] = (val << 8) | val; 2604 val = vc->vc_palette[j++]; 2605 palette_blue[k] = (val << 8) | val; 2606 } 2607 palette_cmap.len = 16; 2608 palette_cmap.start = 0; 2609 /* 2610 * If framebuffer is capable of less than 16 colors, 2611 * use default palette of fbcon. 2612 */ 2613 } else 2614 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2615 2616 fb_set_cmap(&palette_cmap, info); 2617 } 2618 2619 /* As we might be inside of softback, we may work with non-contiguous buffer, 2620 that's why we have to use a separate routine. */ 2621 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2622 { 2623 while (cnt--) { 2624 u16 a = scr_readw(p); 2625 if (!vc->vc_can_do_color) 2626 a ^= 0x0800; 2627 else if (vc->vc_hi_font_mask == 0x100) 2628 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2629 (((a) & 0x0e00) << 4); 2630 else 2631 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2632 (((a) & 0x0700) << 4); 2633 scr_writew(a, p++); 2634 } 2635 } 2636 2637 void fbcon_suspended(struct fb_info *info) 2638 { 2639 struct vc_data *vc = NULL; 2640 struct fbcon_ops *ops = info->fbcon_par; 2641 2642 if (!ops || ops->currcon < 0) 2643 return; 2644 vc = vc_cons[ops->currcon].d; 2645 2646 /* Clear cursor, restore saved data */ 2647 fbcon_cursor(vc, false); 2648 } 2649 2650 void fbcon_resumed(struct fb_info *info) 2651 { 2652 struct vc_data *vc; 2653 struct fbcon_ops *ops = info->fbcon_par; 2654 2655 if (!ops || ops->currcon < 0) 2656 return; 2657 vc = vc_cons[ops->currcon].d; 2658 2659 update_screen(vc); 2660 } 2661 2662 static void fbcon_modechanged(struct fb_info *info) 2663 { 2664 struct fbcon_ops *ops = info->fbcon_par; 2665 struct vc_data *vc; 2666 struct fbcon_display *p; 2667 int rows, cols; 2668 2669 if (!ops || ops->currcon < 0) 2670 return; 2671 vc = vc_cons[ops->currcon].d; 2672 if (vc->vc_mode != KD_TEXT || 2673 fbcon_info_from_console(ops->currcon) != info) 2674 return; 2675 2676 p = &fb_display[vc->vc_num]; 2677 set_blitting_type(vc, info); 2678 2679 if (con_is_visible(vc)) { 2680 var_to_display(p, &info->var, info); 2681 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2682 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2683 cols /= vc->vc_font.width; 2684 rows /= vc->vc_font.height; 2685 vc_resize(vc, cols, rows); 2686 updatescrollmode(p, info, vc); 2687 scrollback_max = 0; 2688 scrollback_current = 0; 2689 2690 if (!fbcon_is_inactive(vc, info)) { 2691 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2692 ops->update_start(info); 2693 } 2694 2695 fbcon_set_palette(vc, color_table); 2696 update_screen(vc); 2697 } 2698 } 2699 2700 static void fbcon_set_all_vcs(struct fb_info *info) 2701 { 2702 struct fbcon_ops *ops = info->fbcon_par; 2703 struct vc_data *vc; 2704 struct fbcon_display *p; 2705 int i, rows, cols, fg = -1; 2706 2707 if (!ops || ops->currcon < 0) 2708 return; 2709 2710 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2711 vc = vc_cons[i].d; 2712 if (!vc || vc->vc_mode != KD_TEXT || 2713 fbcon_info_from_console(i) != info) 2714 continue; 2715 2716 if (con_is_visible(vc)) { 2717 fg = i; 2718 continue; 2719 } 2720 2721 p = &fb_display[vc->vc_num]; 2722 set_blitting_type(vc, info); 2723 var_to_display(p, &info->var, info); 2724 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2725 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2726 cols /= vc->vc_font.width; 2727 rows /= vc->vc_font.height; 2728 vc_resize(vc, cols, rows); 2729 } 2730 2731 if (fg != -1) 2732 fbcon_modechanged(info); 2733 } 2734 2735 2736 void fbcon_update_vcs(struct fb_info *info, bool all) 2737 { 2738 if (all) 2739 fbcon_set_all_vcs(info); 2740 else 2741 fbcon_modechanged(info); 2742 } 2743 EXPORT_SYMBOL(fbcon_update_vcs); 2744 2745 /* let fbcon check if it supports a new screen resolution */ 2746 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2747 { 2748 struct fbcon_ops *ops = info->fbcon_par; 2749 struct vc_data *vc; 2750 unsigned int i; 2751 2752 WARN_CONSOLE_UNLOCKED(); 2753 2754 if (!ops) 2755 return 0; 2756 2757 /* prevent setting a screen size which is smaller than font size */ 2758 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2759 vc = vc_cons[i].d; 2760 if (!vc || vc->vc_mode != KD_TEXT || 2761 fbcon_info_from_console(i) != info) 2762 continue; 2763 2764 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2765 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2766 return -EINVAL; 2767 } 2768 2769 return 0; 2770 } 2771 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2772 2773 int fbcon_mode_deleted(struct fb_info *info, 2774 struct fb_videomode *mode) 2775 { 2776 struct fb_info *fb_info; 2777 struct fbcon_display *p; 2778 int i, j, found = 0; 2779 2780 /* before deletion, ensure that mode is not in use */ 2781 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2782 j = con2fb_map[i]; 2783 if (j == -1) 2784 continue; 2785 fb_info = fbcon_registered_fb[j]; 2786 if (fb_info != info) 2787 continue; 2788 p = &fb_display[i]; 2789 if (!p || !p->mode) 2790 continue; 2791 if (fb_mode_is_equal(p->mode, mode)) { 2792 found = 1; 2793 break; 2794 } 2795 } 2796 return found; 2797 } 2798 2799 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2800 static void fbcon_unbind(void) 2801 { 2802 int ret; 2803 2804 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2805 fbcon_is_default); 2806 2807 if (!ret) 2808 fbcon_has_console_bind = 0; 2809 } 2810 #else 2811 static inline void fbcon_unbind(void) {} 2812 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2813 2814 void fbcon_fb_unbind(struct fb_info *info) 2815 { 2816 int i, new_idx = -1; 2817 int idx = info->node; 2818 2819 console_lock(); 2820 2821 if (!fbcon_has_console_bind) { 2822 console_unlock(); 2823 return; 2824 } 2825 2826 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2827 if (con2fb_map[i] != idx && 2828 con2fb_map[i] != -1) { 2829 new_idx = con2fb_map[i]; 2830 break; 2831 } 2832 } 2833 2834 if (new_idx != -1) { 2835 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2836 if (con2fb_map[i] == idx) 2837 set_con2fb_map(i, new_idx, 0); 2838 } 2839 } else { 2840 struct fb_info *info = fbcon_registered_fb[idx]; 2841 2842 /* This is sort of like set_con2fb_map, except it maps 2843 * the consoles to no device and then releases the 2844 * oldinfo to free memory and cancel the cursor blink 2845 * timer. I can imagine this just becoming part of 2846 * set_con2fb_map where new_idx is -1 2847 */ 2848 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2849 if (con2fb_map[i] == idx) { 2850 con2fb_map[i] = -1; 2851 if (!search_fb_in_map(idx)) { 2852 con2fb_release_oldinfo(vc_cons[i].d, 2853 info, NULL); 2854 } 2855 } 2856 } 2857 fbcon_unbind(); 2858 } 2859 2860 console_unlock(); 2861 } 2862 2863 void fbcon_fb_unregistered(struct fb_info *info) 2864 { 2865 int i, idx; 2866 2867 console_lock(); 2868 2869 fbcon_registered_fb[info->node] = NULL; 2870 fbcon_num_registered_fb--; 2871 2872 if (deferred_takeover) { 2873 console_unlock(); 2874 return; 2875 } 2876 2877 idx = info->node; 2878 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2879 if (con2fb_map[i] == idx) 2880 con2fb_map[i] = -1; 2881 } 2882 2883 if (idx == info_idx) { 2884 info_idx = -1; 2885 2886 fbcon_for_each_registered_fb(i) { 2887 info_idx = i; 2888 break; 2889 } 2890 } 2891 2892 if (info_idx != -1) { 2893 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2894 if (con2fb_map[i] == -1) 2895 con2fb_map[i] = info_idx; 2896 } 2897 } 2898 2899 if (primary_device == idx) 2900 primary_device = -1; 2901 2902 if (!fbcon_num_registered_fb) 2903 do_unregister_con_driver(&fb_con); 2904 console_unlock(); 2905 } 2906 2907 void fbcon_remap_all(struct fb_info *info) 2908 { 2909 int i, idx = info->node; 2910 2911 console_lock(); 2912 if (deferred_takeover) { 2913 for (i = first_fb_vc; i <= last_fb_vc; i++) 2914 con2fb_map_boot[i] = idx; 2915 fbcon_map_override(); 2916 console_unlock(); 2917 return; 2918 } 2919 2920 for (i = first_fb_vc; i <= last_fb_vc; i++) 2921 set_con2fb_map(i, idx, 0); 2922 2923 if (con_is_bound(&fb_con)) { 2924 printk(KERN_INFO "fbcon: Remapping primary device, " 2925 "fb%i, to tty %i-%i\n", idx, 2926 first_fb_vc + 1, last_fb_vc + 1); 2927 info_idx = idx; 2928 } 2929 console_unlock(); 2930 } 2931 2932 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2933 static void fbcon_select_primary(struct fb_info *info) 2934 { 2935 if (!map_override && primary_device == -1 && 2936 video_is_primary_device(info->device)) { 2937 int i; 2938 2939 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2940 info->fix.id, info->node); 2941 primary_device = info->node; 2942 2943 for (i = first_fb_vc; i <= last_fb_vc; i++) 2944 con2fb_map_boot[i] = primary_device; 2945 2946 if (con_is_bound(&fb_con)) { 2947 printk(KERN_INFO "fbcon: Remapping primary device, " 2948 "fb%i, to tty %i-%i\n", info->node, 2949 first_fb_vc + 1, last_fb_vc + 1); 2950 info_idx = primary_device; 2951 } 2952 } 2953 2954 } 2955 #else 2956 static inline void fbcon_select_primary(struct fb_info *info) 2957 { 2958 return; 2959 } 2960 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2961 2962 static bool lockless_register_fb; 2963 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2964 MODULE_PARM_DESC(lockless_register_fb, 2965 "Lockless framebuffer registration for debugging [default=off]"); 2966 2967 /* called with console_lock held */ 2968 static int do_fb_registered(struct fb_info *info) 2969 { 2970 int ret = 0, i, idx; 2971 2972 WARN_CONSOLE_UNLOCKED(); 2973 2974 fbcon_registered_fb[info->node] = info; 2975 fbcon_num_registered_fb++; 2976 2977 idx = info->node; 2978 fbcon_select_primary(info); 2979 2980 if (deferred_takeover) { 2981 pr_info("fbcon: Deferring console take-over\n"); 2982 return 0; 2983 } 2984 2985 if (info_idx == -1) { 2986 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2987 if (con2fb_map_boot[i] == idx) { 2988 info_idx = idx; 2989 break; 2990 } 2991 } 2992 2993 if (info_idx != -1) 2994 ret = do_fbcon_takeover(1); 2995 } else { 2996 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2997 if (con2fb_map_boot[i] == idx) 2998 set_con2fb_map(i, idx, 0); 2999 } 3000 } 3001 3002 return ret; 3003 } 3004 3005 int fbcon_fb_registered(struct fb_info *info) 3006 { 3007 int ret; 3008 3009 if (!lockless_register_fb) 3010 console_lock(); 3011 else 3012 atomic_inc(&ignore_console_lock_warning); 3013 3014 ret = do_fb_registered(info); 3015 3016 if (!lockless_register_fb) 3017 console_unlock(); 3018 else 3019 atomic_dec(&ignore_console_lock_warning); 3020 3021 return ret; 3022 } 3023 3024 void fbcon_fb_blanked(struct fb_info *info, int blank) 3025 { 3026 struct fbcon_ops *ops = info->fbcon_par; 3027 struct vc_data *vc; 3028 3029 if (!ops || ops->currcon < 0) 3030 return; 3031 3032 vc = vc_cons[ops->currcon].d; 3033 if (vc->vc_mode != KD_TEXT || 3034 fbcon_info_from_console(ops->currcon) != info) 3035 return; 3036 3037 if (con_is_visible(vc)) { 3038 if (blank) 3039 do_blank_screen(0); 3040 else 3041 do_unblank_screen(0); 3042 } 3043 ops->blank_state = blank; 3044 } 3045 3046 void fbcon_new_modelist(struct fb_info *info) 3047 { 3048 int i; 3049 struct vc_data *vc; 3050 struct fb_var_screeninfo var; 3051 const struct fb_videomode *mode; 3052 3053 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3054 if (fbcon_info_from_console(i) != info) 3055 continue; 3056 if (!fb_display[i].mode) 3057 continue; 3058 vc = vc_cons[i].d; 3059 display_to_var(&var, &fb_display[i]); 3060 mode = fb_find_nearest_mode(fb_display[i].mode, 3061 &info->modelist); 3062 fb_videomode_to_var(&var, mode); 3063 fbcon_set_disp(info, &var, vc->vc_num); 3064 } 3065 } 3066 3067 void fbcon_get_requirement(struct fb_info *info, 3068 struct fb_blit_caps *caps) 3069 { 3070 struct vc_data *vc; 3071 3072 if (caps->flags) { 3073 int i, charcnt; 3074 3075 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3076 vc = vc_cons[i].d; 3077 if (vc && vc->vc_mode == KD_TEXT && 3078 info->node == con2fb_map[i]) { 3079 set_bit(vc->vc_font.width - 1, caps->x); 3080 set_bit(vc->vc_font.height - 1, caps->y); 3081 charcnt = vc->vc_font.charcount; 3082 if (caps->len < charcnt) 3083 caps->len = charcnt; 3084 } 3085 } 3086 } else { 3087 vc = vc_cons[fg_console].d; 3088 3089 if (vc && vc->vc_mode == KD_TEXT && 3090 info->node == con2fb_map[fg_console]) { 3091 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH); 3092 set_bit(vc->vc_font.width - 1, caps->x); 3093 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT); 3094 set_bit(vc->vc_font.height - 1, caps->y); 3095 caps->len = vc->vc_font.charcount; 3096 } 3097 } 3098 } 3099 3100 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3101 { 3102 struct fb_con2fbmap con2fb; 3103 int ret; 3104 3105 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3106 return -EFAULT; 3107 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3108 return -EINVAL; 3109 if (con2fb.framebuffer >= FB_MAX) 3110 return -EINVAL; 3111 if (!fbcon_registered_fb[con2fb.framebuffer]) 3112 request_module("fb%d", con2fb.framebuffer); 3113 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3114 return -EINVAL; 3115 } 3116 3117 console_lock(); 3118 ret = set_con2fb_map(con2fb.console - 1, 3119 con2fb.framebuffer, 1); 3120 console_unlock(); 3121 3122 return ret; 3123 } 3124 3125 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3126 { 3127 struct fb_con2fbmap con2fb; 3128 3129 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3130 return -EFAULT; 3131 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3132 return -EINVAL; 3133 3134 console_lock(); 3135 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3136 console_unlock(); 3137 3138 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3139 } 3140 3141 /* 3142 * The console `switch' structure for the frame buffer based console 3143 */ 3144 3145 static const struct consw fb_con = { 3146 .owner = THIS_MODULE, 3147 .con_startup = fbcon_startup, 3148 .con_init = fbcon_init, 3149 .con_deinit = fbcon_deinit, 3150 .con_clear = fbcon_clear, 3151 .con_putcs = fbcon_putcs, 3152 .con_cursor = fbcon_cursor, 3153 .con_scroll = fbcon_scroll, 3154 .con_switch = fbcon_switch, 3155 .con_blank = fbcon_blank, 3156 .con_font_set = fbcon_set_font, 3157 .con_font_get = fbcon_get_font, 3158 .con_font_default = fbcon_set_def_font, 3159 .con_set_palette = fbcon_set_palette, 3160 .con_invert_region = fbcon_invert_region, 3161 .con_resize = fbcon_resize, 3162 .con_debug_enter = fbcon_debug_enter, 3163 .con_debug_leave = fbcon_debug_leave, 3164 }; 3165 3166 static ssize_t rotate_store(struct device *device, 3167 struct device_attribute *attr, const char *buf, 3168 size_t count) 3169 { 3170 struct fb_info *info; 3171 int rotate, idx; 3172 char **last = NULL; 3173 3174 console_lock(); 3175 idx = con2fb_map[fg_console]; 3176 3177 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3178 goto err; 3179 3180 info = fbcon_registered_fb[idx]; 3181 rotate = simple_strtoul(buf, last, 0); 3182 fbcon_rotate(info, rotate); 3183 err: 3184 console_unlock(); 3185 return count; 3186 } 3187 3188 static ssize_t rotate_all_store(struct device *device, 3189 struct device_attribute *attr,const char *buf, 3190 size_t count) 3191 { 3192 struct fb_info *info; 3193 int rotate, idx; 3194 char **last = NULL; 3195 3196 console_lock(); 3197 idx = con2fb_map[fg_console]; 3198 3199 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3200 goto err; 3201 3202 info = fbcon_registered_fb[idx]; 3203 rotate = simple_strtoul(buf, last, 0); 3204 fbcon_rotate_all(info, rotate); 3205 err: 3206 console_unlock(); 3207 return count; 3208 } 3209 3210 static ssize_t rotate_show(struct device *device, 3211 struct device_attribute *attr,char *buf) 3212 { 3213 struct fb_info *info; 3214 int rotate = 0, idx; 3215 3216 console_lock(); 3217 idx = con2fb_map[fg_console]; 3218 3219 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3220 goto err; 3221 3222 info = fbcon_registered_fb[idx]; 3223 rotate = fbcon_get_rotate(info); 3224 err: 3225 console_unlock(); 3226 return sysfs_emit(buf, "%d\n", rotate); 3227 } 3228 3229 static ssize_t cursor_blink_show(struct device *device, 3230 struct device_attribute *attr, char *buf) 3231 { 3232 struct fb_info *info; 3233 struct fbcon_ops *ops; 3234 int idx, blink = -1; 3235 3236 console_lock(); 3237 idx = con2fb_map[fg_console]; 3238 3239 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3240 goto err; 3241 3242 info = fbcon_registered_fb[idx]; 3243 ops = info->fbcon_par; 3244 3245 if (!ops) 3246 goto err; 3247 3248 blink = delayed_work_pending(&ops->cursor_work); 3249 err: 3250 console_unlock(); 3251 return sysfs_emit(buf, "%d\n", blink); 3252 } 3253 3254 static ssize_t cursor_blink_store(struct device *device, 3255 struct device_attribute *attr, 3256 const char *buf, size_t count) 3257 { 3258 struct fb_info *info; 3259 int blink, idx; 3260 char **last = NULL; 3261 3262 console_lock(); 3263 idx = con2fb_map[fg_console]; 3264 3265 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3266 goto err; 3267 3268 info = fbcon_registered_fb[idx]; 3269 3270 if (!info->fbcon_par) 3271 goto err; 3272 3273 blink = simple_strtoul(buf, last, 0); 3274 3275 if (blink) { 3276 fbcon_cursor_noblink = 0; 3277 fbcon_add_cursor_work(info); 3278 } else { 3279 fbcon_cursor_noblink = 1; 3280 fbcon_del_cursor_work(info); 3281 } 3282 3283 err: 3284 console_unlock(); 3285 return count; 3286 } 3287 3288 static DEVICE_ATTR_RW(cursor_blink); 3289 static DEVICE_ATTR_RW(rotate); 3290 static DEVICE_ATTR_WO(rotate_all); 3291 3292 static struct attribute *fbcon_device_attrs[] = { 3293 &dev_attr_cursor_blink.attr, 3294 &dev_attr_rotate.attr, 3295 &dev_attr_rotate_all.attr, 3296 NULL 3297 }; 3298 3299 ATTRIBUTE_GROUPS(fbcon_device); 3300 3301 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3302 static void fbcon_register_existing_fbs(struct work_struct *work) 3303 { 3304 int i; 3305 3306 console_lock(); 3307 3308 deferred_takeover = false; 3309 logo_shown = FBCON_LOGO_DONTSHOW; 3310 3311 fbcon_for_each_registered_fb(i) 3312 do_fb_registered(fbcon_registered_fb[i]); 3313 3314 console_unlock(); 3315 } 3316 3317 static struct notifier_block fbcon_output_nb; 3318 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3319 3320 static int fbcon_output_notifier(struct notifier_block *nb, 3321 unsigned long action, void *data) 3322 { 3323 WARN_CONSOLE_UNLOCKED(); 3324 3325 pr_info("fbcon: Taking over console\n"); 3326 3327 dummycon_unregister_output_notifier(&fbcon_output_nb); 3328 3329 /* We may get called in atomic context */ 3330 schedule_work(&fbcon_deferred_takeover_work); 3331 3332 return NOTIFY_OK; 3333 } 3334 #endif 3335 3336 static void fbcon_start(void) 3337 { 3338 WARN_CONSOLE_UNLOCKED(); 3339 3340 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3341 if (conswitchp != &dummy_con) 3342 deferred_takeover = false; 3343 3344 if (deferred_takeover) { 3345 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3346 dummycon_register_output_notifier(&fbcon_output_nb); 3347 return; 3348 } 3349 #endif 3350 } 3351 3352 void __init fb_console_init(void) 3353 { 3354 int i; 3355 3356 console_lock(); 3357 fbcon_device = device_create_with_groups(fb_class, NULL, 3358 MKDEV(0, 0), NULL, 3359 fbcon_device_groups, "fbcon"); 3360 3361 if (IS_ERR(fbcon_device)) { 3362 printk(KERN_WARNING "Unable to create device " 3363 "for fbcon; errno = %ld\n", 3364 PTR_ERR(fbcon_device)); 3365 fbcon_device = NULL; 3366 } 3367 3368 for (i = 0; i < MAX_NR_CONSOLES; i++) 3369 con2fb_map[i] = -1; 3370 3371 fbcon_start(); 3372 console_unlock(); 3373 } 3374 3375 #ifdef MODULE 3376 3377 void __exit fb_console_exit(void) 3378 { 3379 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3380 console_lock(); 3381 if (deferred_takeover) 3382 dummycon_unregister_output_notifier(&fbcon_output_nb); 3383 console_unlock(); 3384 3385 cancel_work_sync(&fbcon_deferred_takeover_work); 3386 #endif 3387 3388 console_lock(); 3389 device_destroy(fb_class, MKDEV(0, 0)); 3390 3391 do_unregister_con_driver(&fb_con); 3392 console_unlock(); 3393 } 3394 #endif 3395