1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/panic.h> 68 #include <linux/printk.h> 69 #include <linux/slab.h> 70 #include <linux/fb.h> 71 #include <linux/fbcon.h> 72 #include <linux/vt_kern.h> 73 #include <linux/selection.h> 74 #include <linux/font.h> 75 #include <linux/smp.h> 76 #include <linux/init.h> 77 #include <linux/interrupt.h> 78 #include <linux/crc32.h> /* For counting font checksums */ 79 #include <linux/uaccess.h> 80 #include <asm/irq.h> 81 82 #include "fbcon.h" 83 #include "fb_internal.h" 84 85 /* 86 * FIXME: Locking 87 * 88 * - fbcon state itself is protected by the console_lock, and the code does a 89 * pretty good job at making sure that lock is held everywhere it's needed. 90 * 91 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 92 * means concurrent access to the same fbdev from both fbcon and userspace 93 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 94 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 95 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 96 * fbmem.c cannot use locking asserts, and there's lots of callers which get 97 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 98 */ 99 100 enum { 101 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 102 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 103 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 104 }; 105 106 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 107 108 static struct fb_info *fbcon_registered_fb[FB_MAX]; 109 static int fbcon_num_registered_fb; 110 111 #define fbcon_for_each_registered_fb(i) \ 112 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 113 if (!fbcon_registered_fb[i]) {} else 114 115 static signed char con2fb_map[MAX_NR_CONSOLES]; 116 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 117 118 static struct fb_info *fbcon_info_from_console(int console) 119 { 120 WARN_CONSOLE_UNLOCKED(); 121 122 return fbcon_registered_fb[con2fb_map[console]]; 123 } 124 125 static int logo_lines; 126 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 127 enums. */ 128 static int logo_shown = FBCON_LOGO_CANSHOW; 129 /* console mappings */ 130 static unsigned int first_fb_vc; 131 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 132 static int fbcon_is_default = 1; 133 static int primary_device = -1; 134 static int fbcon_has_console_bind; 135 136 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 137 static int map_override; 138 139 static inline void fbcon_map_override(void) 140 { 141 map_override = 1; 142 } 143 #else 144 static inline void fbcon_map_override(void) 145 { 146 } 147 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 148 149 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 150 static bool deferred_takeover = true; 151 #else 152 #define deferred_takeover false 153 #endif 154 155 /* font data */ 156 static char fontname[40]; 157 158 /* current fb_info */ 159 static int info_idx = -1; 160 161 /* console rotation */ 162 static int initial_rotation = -1; 163 static int fbcon_has_sysfs; 164 static int margin_color; 165 166 static const struct consw fb_con; 167 168 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 169 170 static int fbcon_cursor_noblink; 171 172 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 173 174 /* 175 * Interface used by the world 176 */ 177 178 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 179 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 180 181 /* 182 * Internal routines 183 */ 184 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 185 int unit); 186 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 187 int line, int count, int dy); 188 static void fbcon_modechanged(struct fb_info *info); 189 static void fbcon_set_all_vcs(struct fb_info *info); 190 191 static struct device *fbcon_device; 192 193 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 194 static inline void fbcon_set_rotation(struct fb_info *info) 195 { 196 struct fbcon_ops *ops = info->fbcon_par; 197 198 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 199 ops->p->con_rotate < 4) 200 ops->rotate = ops->p->con_rotate; 201 else 202 ops->rotate = 0; 203 } 204 205 static void fbcon_rotate(struct fb_info *info, u32 rotate) 206 { 207 struct fbcon_ops *ops= info->fbcon_par; 208 struct fb_info *fb_info; 209 210 if (!ops || ops->currcon == -1) 211 return; 212 213 fb_info = fbcon_info_from_console(ops->currcon); 214 215 if (info == fb_info) { 216 struct fbcon_display *p = &fb_display[ops->currcon]; 217 218 if (rotate < 4) 219 p->con_rotate = rotate; 220 else 221 p->con_rotate = 0; 222 223 fbcon_modechanged(info); 224 } 225 } 226 227 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 228 { 229 struct fbcon_ops *ops = info->fbcon_par; 230 struct vc_data *vc; 231 struct fbcon_display *p; 232 int i; 233 234 if (!ops || ops->currcon < 0 || rotate > 3) 235 return; 236 237 for (i = first_fb_vc; i <= last_fb_vc; i++) { 238 vc = vc_cons[i].d; 239 if (!vc || vc->vc_mode != KD_TEXT || 240 fbcon_info_from_console(i) != info) 241 continue; 242 243 p = &fb_display[vc->vc_num]; 244 p->con_rotate = rotate; 245 } 246 247 fbcon_set_all_vcs(info); 248 } 249 #else 250 static inline void fbcon_set_rotation(struct fb_info *info) 251 { 252 struct fbcon_ops *ops = info->fbcon_par; 253 254 ops->rotate = FB_ROTATE_UR; 255 } 256 257 static void fbcon_rotate(struct fb_info *info, u32 rotate) 258 { 259 return; 260 } 261 262 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 263 { 264 return; 265 } 266 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 267 268 static int fbcon_get_rotate(struct fb_info *info) 269 { 270 struct fbcon_ops *ops = info->fbcon_par; 271 272 return (ops) ? ops->rotate : 0; 273 } 274 275 static bool fbcon_skip_panic(struct fb_info *info) 276 { 277 /* panic_cpu is not exported, and can't be used if built as module. Use 278 * oops_in_progress instead, but non-fatal oops won't be printed. 279 */ 280 #if defined(MODULE) 281 return (info->skip_panic && unlikely(oops_in_progress)); 282 #else 283 return (info->skip_panic && unlikely(atomic_read(&panic_cpu) != PANIC_CPU_INVALID)); 284 #endif 285 } 286 287 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 288 { 289 struct fbcon_ops *ops = info->fbcon_par; 290 291 return (info->state != FBINFO_STATE_RUNNING || 292 vc->vc_mode != KD_TEXT || ops->graphics || fbcon_skip_panic(info)); 293 } 294 295 static int get_color(struct vc_data *vc, struct fb_info *info, 296 u16 c, int is_fg) 297 { 298 int depth = fb_get_color_depth(&info->var, &info->fix); 299 int color = 0; 300 301 if (console_blanked) { 302 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 303 304 c = vc->vc_video_erase_char & charmask; 305 } 306 307 if (depth != 1) 308 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 309 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 310 311 switch (depth) { 312 case 1: 313 { 314 int col = mono_col(info); 315 /* 0 or 1 */ 316 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 317 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 318 319 if (console_blanked) 320 fg = bg; 321 322 color = (is_fg) ? fg : bg; 323 break; 324 } 325 case 2: 326 /* 327 * Scale down 16-colors to 4 colors. Default 4-color palette 328 * is grayscale. However, simply dividing the values by 4 329 * will not work, as colors 1, 2 and 3 will be scaled-down 330 * to zero rendering them invisible. So empirically convert 331 * colors to a sane 4-level grayscale. 332 */ 333 switch (color) { 334 case 0: 335 color = 0; /* black */ 336 break; 337 case 1 ... 6: 338 color = 2; /* white */ 339 break; 340 case 7 ... 8: 341 color = 1; /* gray */ 342 break; 343 default: 344 color = 3; /* intense white */ 345 break; 346 } 347 break; 348 case 3: 349 /* 350 * Last 8 entries of default 16-color palette is a more intense 351 * version of the first 8 (i.e., same chrominance, different 352 * luminance). 353 */ 354 color &= 7; 355 break; 356 } 357 358 359 return color; 360 } 361 362 static void fb_flashcursor(struct work_struct *work) 363 { 364 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 365 struct fb_info *info; 366 struct vc_data *vc = NULL; 367 int c; 368 bool enable; 369 int ret; 370 371 /* FIXME: we should sort out the unbind locking instead */ 372 /* instead we just fail to flash the cursor if we can't get 373 * the lock instead of blocking fbcon deinit */ 374 ret = console_trylock(); 375 if (ret == 0) 376 return; 377 378 /* protected by console_lock */ 379 info = ops->info; 380 381 if (ops->currcon != -1) 382 vc = vc_cons[ops->currcon].d; 383 384 if (!vc || !con_is_visible(vc) || 385 fbcon_info_from_console(vc->vc_num) != info || 386 vc->vc_deccm != 1) { 387 console_unlock(); 388 return; 389 } 390 391 c = scr_readw((u16 *) vc->vc_pos); 392 enable = ops->cursor_flash && !ops->cursor_state.enable; 393 ops->cursor(vc, info, enable, get_color(vc, info, c, 1), 394 get_color(vc, info, c, 0)); 395 console_unlock(); 396 397 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 398 ops->cur_blink_jiffies); 399 } 400 401 static void fbcon_add_cursor_work(struct fb_info *info) 402 { 403 struct fbcon_ops *ops = info->fbcon_par; 404 405 if (!fbcon_cursor_noblink) 406 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 407 ops->cur_blink_jiffies); 408 } 409 410 static void fbcon_del_cursor_work(struct fb_info *info) 411 { 412 struct fbcon_ops *ops = info->fbcon_par; 413 414 cancel_delayed_work_sync(&ops->cursor_work); 415 } 416 417 #ifndef MODULE 418 static int __init fb_console_setup(char *this_opt) 419 { 420 char *options; 421 int i, j; 422 423 if (!this_opt || !*this_opt) 424 return 1; 425 426 while ((options = strsep(&this_opt, ",")) != NULL) { 427 if (!strncmp(options, "font:", 5)) { 428 strscpy(fontname, options + 5, sizeof(fontname)); 429 continue; 430 } 431 432 if (!strncmp(options, "scrollback:", 11)) { 433 pr_warn("Ignoring scrollback size option\n"); 434 continue; 435 } 436 437 if (!strncmp(options, "map:", 4)) { 438 options += 4; 439 if (*options) { 440 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 441 if (!options[j]) 442 j = 0; 443 con2fb_map_boot[i] = 444 (options[j++]-'0') % FB_MAX; 445 } 446 447 fbcon_map_override(); 448 } 449 continue; 450 } 451 452 if (!strncmp(options, "vc:", 3)) { 453 options += 3; 454 if (*options) 455 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 456 if (first_fb_vc >= MAX_NR_CONSOLES) 457 first_fb_vc = 0; 458 if (*options++ == '-') 459 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 460 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 461 last_fb_vc = MAX_NR_CONSOLES - 1; 462 fbcon_is_default = 0; 463 continue; 464 } 465 466 if (!strncmp(options, "rotate:", 7)) { 467 options += 7; 468 if (*options) 469 initial_rotation = simple_strtoul(options, &options, 0); 470 if (initial_rotation > 3) 471 initial_rotation = 0; 472 continue; 473 } 474 475 if (!strncmp(options, "margin:", 7)) { 476 options += 7; 477 if (*options) 478 margin_color = simple_strtoul(options, &options, 0); 479 continue; 480 } 481 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 482 if (!strcmp(options, "nodefer")) { 483 deferred_takeover = false; 484 continue; 485 } 486 #endif 487 488 #ifdef CONFIG_LOGO 489 if (!strncmp(options, "logo-pos:", 9)) { 490 options += 9; 491 if (!strcmp(options, "center")) 492 fb_center_logo = true; 493 continue; 494 } 495 496 if (!strncmp(options, "logo-count:", 11)) { 497 options += 11; 498 if (*options) 499 fb_logo_count = simple_strtol(options, &options, 0); 500 continue; 501 } 502 #endif 503 } 504 return 1; 505 } 506 507 __setup("fbcon=", fb_console_setup); 508 #endif 509 510 static int search_fb_in_map(int idx) 511 { 512 int i, retval = 0; 513 514 for (i = first_fb_vc; i <= last_fb_vc; i++) { 515 if (con2fb_map[i] == idx) 516 retval = 1; 517 } 518 return retval; 519 } 520 521 static int search_for_mapped_con(void) 522 { 523 int i, retval = 0; 524 525 for (i = first_fb_vc; i <= last_fb_vc; i++) { 526 if (con2fb_map[i] != -1) 527 retval = 1; 528 } 529 return retval; 530 } 531 532 static int do_fbcon_takeover(int show_logo) 533 { 534 int err, i; 535 536 if (!fbcon_num_registered_fb) 537 return -ENODEV; 538 539 if (!show_logo) 540 logo_shown = FBCON_LOGO_DONTSHOW; 541 542 for (i = first_fb_vc; i <= last_fb_vc; i++) 543 con2fb_map[i] = info_idx; 544 545 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 546 fbcon_is_default); 547 548 if (err) { 549 for (i = first_fb_vc; i <= last_fb_vc; i++) 550 con2fb_map[i] = -1; 551 info_idx = -1; 552 } else { 553 fbcon_has_console_bind = 1; 554 } 555 556 return err; 557 } 558 559 #ifdef MODULE 560 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 561 int cols, int rows, int new_cols, int new_rows) 562 { 563 logo_shown = FBCON_LOGO_DONTSHOW; 564 } 565 #else 566 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 567 int cols, int rows, int new_cols, int new_rows) 568 { 569 /* Need to make room for the logo */ 570 struct fbcon_ops *ops = info->fbcon_par; 571 int cnt, erase = vc->vc_video_erase_char, step; 572 unsigned short *save = NULL, *r, *q; 573 int logo_height; 574 575 if (info->fbops->owner) { 576 logo_shown = FBCON_LOGO_DONTSHOW; 577 return; 578 } 579 580 /* 581 * remove underline attribute from erase character 582 * if black and white framebuffer. 583 */ 584 if (fb_get_color_depth(&info->var, &info->fix) == 1) 585 erase &= ~0x400; 586 logo_height = fb_prepare_logo(info, ops->rotate); 587 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 588 q = (unsigned short *) (vc->vc_origin + 589 vc->vc_size_row * rows); 590 step = logo_lines * cols; 591 for (r = q - logo_lines * cols; r < q; r++) 592 if (scr_readw(r) != vc->vc_video_erase_char) 593 break; 594 if (r != q && new_rows >= rows + logo_lines) { 595 save = kmalloc(array3_size(logo_lines, new_cols, 2), 596 GFP_KERNEL); 597 if (save) { 598 int i = min(cols, new_cols); 599 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 600 r = q - step; 601 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 602 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 603 r = q; 604 } 605 } 606 if (r == q) { 607 /* We can scroll screen down */ 608 r = q - step - cols; 609 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 610 scr_memcpyw(r + step, r, vc->vc_size_row); 611 r -= cols; 612 } 613 if (!save) { 614 int lines; 615 if (vc->state.y + logo_lines >= rows) 616 lines = rows - vc->state.y - 1; 617 else 618 lines = logo_lines; 619 vc->state.y += lines; 620 vc->vc_pos += lines * vc->vc_size_row; 621 } 622 } 623 scr_memsetw((unsigned short *) vc->vc_origin, 624 erase, 625 vc->vc_size_row * logo_lines); 626 627 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 628 fbcon_clear_margins(vc, 0); 629 update_screen(vc); 630 } 631 632 if (save) { 633 q = (unsigned short *) (vc->vc_origin + 634 vc->vc_size_row * 635 rows); 636 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 637 vc->state.y += logo_lines; 638 vc->vc_pos += logo_lines * vc->vc_size_row; 639 kfree(save); 640 } 641 642 if (logo_shown == FBCON_LOGO_DONTSHOW) 643 return; 644 645 if (logo_lines > vc->vc_bottom) { 646 logo_shown = FBCON_LOGO_CANSHOW; 647 pr_info("fbcon: disable boot-logo (boot-logo bigger than screen).\n"); 648 } else { 649 logo_shown = FBCON_LOGO_DRAW; 650 vc->vc_top = logo_lines; 651 } 652 } 653 #endif /* MODULE */ 654 655 #ifdef CONFIG_FB_TILEBLITTING 656 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 657 { 658 struct fbcon_ops *ops = info->fbcon_par; 659 660 ops->p = &fb_display[vc->vc_num]; 661 662 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 663 fbcon_set_tileops(vc, info); 664 else { 665 fbcon_set_rotation(info); 666 fbcon_set_bitops(ops); 667 } 668 } 669 670 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 671 { 672 int err = 0; 673 674 if (info->flags & FBINFO_MISC_TILEBLITTING && 675 info->tileops->fb_get_tilemax(info) < charcount) 676 err = 1; 677 678 return err; 679 } 680 #else 681 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 682 { 683 struct fbcon_ops *ops = info->fbcon_par; 684 685 info->flags &= ~FBINFO_MISC_TILEBLITTING; 686 ops->p = &fb_display[vc->vc_num]; 687 fbcon_set_rotation(info); 688 fbcon_set_bitops(ops); 689 } 690 691 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 692 { 693 return 0; 694 } 695 696 #endif /* CONFIG_MISC_TILEBLITTING */ 697 698 static void fbcon_release(struct fb_info *info) 699 { 700 lock_fb_info(info); 701 if (info->fbops->fb_release) 702 info->fbops->fb_release(info, 0); 703 unlock_fb_info(info); 704 705 module_put(info->fbops->owner); 706 707 if (info->fbcon_par) { 708 struct fbcon_ops *ops = info->fbcon_par; 709 710 fbcon_del_cursor_work(info); 711 kfree(ops->cursor_state.mask); 712 kfree(ops->cursor_data); 713 kfree(ops->cursor_src); 714 kfree(ops->fontbuffer); 715 kfree(info->fbcon_par); 716 info->fbcon_par = NULL; 717 } 718 } 719 720 static int fbcon_open(struct fb_info *info) 721 { 722 struct fbcon_ops *ops; 723 724 if (!try_module_get(info->fbops->owner)) 725 return -ENODEV; 726 727 lock_fb_info(info); 728 if (info->fbops->fb_open && 729 info->fbops->fb_open(info, 0)) { 730 unlock_fb_info(info); 731 module_put(info->fbops->owner); 732 return -ENODEV; 733 } 734 unlock_fb_info(info); 735 736 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 737 if (!ops) { 738 fbcon_release(info); 739 return -ENOMEM; 740 } 741 742 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 743 ops->info = info; 744 info->fbcon_par = ops; 745 ops->cur_blink_jiffies = HZ / 5; 746 747 return 0; 748 } 749 750 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 751 int unit) 752 { 753 int err; 754 755 err = fbcon_open(info); 756 if (err) 757 return err; 758 759 if (vc) 760 set_blitting_type(vc, info); 761 762 return err; 763 } 764 765 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 766 struct fb_info *newinfo) 767 { 768 int ret; 769 770 fbcon_release(oldinfo); 771 772 /* 773 If oldinfo and newinfo are driving the same hardware, 774 the fb_release() method of oldinfo may attempt to 775 restore the hardware state. This will leave the 776 newinfo in an undefined state. Thus, a call to 777 fb_set_par() may be needed for the newinfo. 778 */ 779 if (newinfo && newinfo->fbops->fb_set_par) { 780 ret = newinfo->fbops->fb_set_par(newinfo); 781 782 if (ret) 783 printk(KERN_ERR "con2fb_release_oldinfo: " 784 "detected unhandled fb_set_par error, " 785 "error code %d\n", ret); 786 } 787 } 788 789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 790 int unit, int show_logo) 791 { 792 struct fbcon_ops *ops = info->fbcon_par; 793 int ret; 794 795 ops->currcon = fg_console; 796 797 if (info->fbops->fb_set_par && !ops->initialized) { 798 ret = info->fbops->fb_set_par(info); 799 800 if (ret) 801 printk(KERN_ERR "con2fb_init_display: detected " 802 "unhandled fb_set_par error, " 803 "error code %d\n", ret); 804 } 805 806 ops->initialized = true; 807 ops->graphics = 0; 808 fbcon_set_disp(info, &info->var, unit); 809 810 if (show_logo) { 811 struct vc_data *fg_vc = vc_cons[fg_console].d; 812 struct fb_info *fg_info = 813 fbcon_info_from_console(fg_console); 814 815 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 816 fg_vc->vc_rows, fg_vc->vc_cols, 817 fg_vc->vc_rows); 818 } 819 820 update_screen(vc_cons[fg_console].d); 821 } 822 823 /** 824 * set_con2fb_map - map console to frame buffer device 825 * @unit: virtual console number to map 826 * @newidx: frame buffer index to map virtual console to 827 * @user: user request 828 * 829 * Maps a virtual console @unit to a frame buffer device 830 * @newidx. 831 * 832 * This should be called with the console lock held. 833 */ 834 static int set_con2fb_map(int unit, int newidx, int user) 835 { 836 struct vc_data *vc = vc_cons[unit].d; 837 int oldidx = con2fb_map[unit]; 838 struct fb_info *info = fbcon_registered_fb[newidx]; 839 struct fb_info *oldinfo = NULL; 840 int err = 0, show_logo; 841 842 WARN_CONSOLE_UNLOCKED(); 843 844 if (oldidx == newidx) 845 return 0; 846 847 if (!info) 848 return -EINVAL; 849 850 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 851 info_idx = newidx; 852 return do_fbcon_takeover(0); 853 } 854 855 if (oldidx != -1) 856 oldinfo = fbcon_registered_fb[oldidx]; 857 858 if (!search_fb_in_map(newidx)) { 859 err = con2fb_acquire_newinfo(vc, info, unit); 860 if (err) 861 return err; 862 863 fbcon_add_cursor_work(info); 864 } 865 866 con2fb_map[unit] = newidx; 867 868 /* 869 * If old fb is not mapped to any of the consoles, 870 * fbcon should release it. 871 */ 872 if (oldinfo && !search_fb_in_map(oldidx)) 873 con2fb_release_oldinfo(vc, oldinfo, info); 874 875 show_logo = (fg_console == 0 && !user && 876 logo_shown != FBCON_LOGO_DONTSHOW); 877 878 con2fb_map_boot[unit] = newidx; 879 con2fb_init_display(vc, info, unit, show_logo); 880 881 if (!search_fb_in_map(info_idx)) 882 info_idx = newidx; 883 884 return err; 885 } 886 887 /* 888 * Low Level Operations 889 */ 890 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 891 static int var_to_display(struct fbcon_display *disp, 892 struct fb_var_screeninfo *var, 893 struct fb_info *info) 894 { 895 disp->xres_virtual = var->xres_virtual; 896 disp->yres_virtual = var->yres_virtual; 897 disp->bits_per_pixel = var->bits_per_pixel; 898 disp->grayscale = var->grayscale; 899 disp->nonstd = var->nonstd; 900 disp->accel_flags = var->accel_flags; 901 disp->height = var->height; 902 disp->width = var->width; 903 disp->red = var->red; 904 disp->green = var->green; 905 disp->blue = var->blue; 906 disp->transp = var->transp; 907 disp->rotate = var->rotate; 908 disp->mode = fb_match_mode(var, &info->modelist); 909 if (disp->mode == NULL) 910 /* This should not happen */ 911 return -EINVAL; 912 return 0; 913 } 914 915 static void display_to_var(struct fb_var_screeninfo *var, 916 struct fbcon_display *disp) 917 { 918 fb_videomode_to_var(var, disp->mode); 919 var->xres_virtual = disp->xres_virtual; 920 var->yres_virtual = disp->yres_virtual; 921 var->bits_per_pixel = disp->bits_per_pixel; 922 var->grayscale = disp->grayscale; 923 var->nonstd = disp->nonstd; 924 var->accel_flags = disp->accel_flags; 925 var->height = disp->height; 926 var->width = disp->width; 927 var->red = disp->red; 928 var->green = disp->green; 929 var->blue = disp->blue; 930 var->transp = disp->transp; 931 var->rotate = disp->rotate; 932 } 933 934 static const char *fbcon_startup(void) 935 { 936 static const char display_desc[] = "frame buffer device"; 937 struct fbcon_display *p = &fb_display[fg_console]; 938 struct vc_data *vc = vc_cons[fg_console].d; 939 const struct font_desc *font = NULL; 940 struct fb_info *info = NULL; 941 struct fbcon_ops *ops; 942 int rows, cols; 943 944 /* 945 * If num_registered_fb is zero, this is a call for the dummy part. 946 * The frame buffer devices weren't initialized yet. 947 */ 948 if (!fbcon_num_registered_fb || info_idx == -1) 949 return display_desc; 950 /* 951 * Instead of blindly using registered_fb[0], we use info_idx, set by 952 * fbcon_fb_registered(); 953 */ 954 info = fbcon_registered_fb[info_idx]; 955 if (!info) 956 return NULL; 957 958 if (fbcon_open(info)) 959 return NULL; 960 961 ops = info->fbcon_par; 962 ops->currcon = -1; 963 ops->graphics = 1; 964 ops->cur_rotate = -1; 965 966 p->con_rotate = initial_rotation; 967 if (p->con_rotate == -1) 968 p->con_rotate = info->fbcon_rotate_hint; 969 if (p->con_rotate == -1) 970 p->con_rotate = FB_ROTATE_UR; 971 972 set_blitting_type(vc, info); 973 974 /* Setup default font */ 975 if (!p->fontdata) { 976 if (!fontname[0] || !(font = find_font(fontname))) 977 font = get_default_font(info->var.xres, 978 info->var.yres, 979 info->pixmap.blit_x, 980 info->pixmap.blit_y); 981 vc->vc_font.width = font->width; 982 vc->vc_font.height = font->height; 983 vc->vc_font.data = (void *)(p->fontdata = font->data); 984 vc->vc_font.charcount = font->charcount; 985 } 986 987 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 988 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 989 cols /= vc->vc_font.width; 990 rows /= vc->vc_font.height; 991 vc_resize(vc, cols, rows); 992 993 pr_debug("mode: %s\n", info->fix.id); 994 pr_debug("visual: %d\n", info->fix.visual); 995 pr_debug("res: %dx%d-%d\n", info->var.xres, 996 info->var.yres, 997 info->var.bits_per_pixel); 998 999 fbcon_add_cursor_work(info); 1000 return display_desc; 1001 } 1002 1003 static void fbcon_init(struct vc_data *vc, bool init) 1004 { 1005 struct fb_info *info; 1006 struct fbcon_ops *ops; 1007 struct vc_data **default_mode = vc->vc_display_fg; 1008 struct vc_data *svc = *default_mode; 1009 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1010 int logo = 1, new_rows, new_cols, rows, cols; 1011 int ret; 1012 1013 if (WARN_ON(info_idx == -1)) 1014 return; 1015 1016 if (con2fb_map[vc->vc_num] == -1) 1017 con2fb_map[vc->vc_num] = info_idx; 1018 1019 info = fbcon_info_from_console(vc->vc_num); 1020 1021 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1022 logo_shown = FBCON_LOGO_DONTSHOW; 1023 1024 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1025 (info->fix.type == FB_TYPE_TEXT)) 1026 logo = 0; 1027 1028 if (var_to_display(p, &info->var, info)) 1029 return; 1030 1031 if (!info->fbcon_par) 1032 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1033 1034 /* If we are not the first console on this 1035 fb, copy the font from that console */ 1036 t = &fb_display[fg_console]; 1037 if (!p->fontdata) { 1038 if (t->fontdata) { 1039 struct vc_data *fvc = vc_cons[fg_console].d; 1040 1041 vc->vc_font.data = (void *)(p->fontdata = 1042 fvc->vc_font.data); 1043 vc->vc_font.width = fvc->vc_font.width; 1044 vc->vc_font.height = fvc->vc_font.height; 1045 vc->vc_font.charcount = fvc->vc_font.charcount; 1046 p->userfont = t->userfont; 1047 1048 if (p->userfont) 1049 REFCOUNT(p->fontdata)++; 1050 } else { 1051 const struct font_desc *font = NULL; 1052 1053 if (!fontname[0] || !(font = find_font(fontname))) 1054 font = get_default_font(info->var.xres, 1055 info->var.yres, 1056 info->pixmap.blit_x, 1057 info->pixmap.blit_y); 1058 vc->vc_font.width = font->width; 1059 vc->vc_font.height = font->height; 1060 vc->vc_font.data = (void *)(p->fontdata = font->data); 1061 vc->vc_font.charcount = font->charcount; 1062 } 1063 } 1064 1065 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1066 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1067 if (vc->vc_font.charcount == 256) { 1068 vc->vc_hi_font_mask = 0; 1069 } else { 1070 vc->vc_hi_font_mask = 0x100; 1071 if (vc->vc_can_do_color) 1072 vc->vc_complement_mask <<= 1; 1073 } 1074 1075 if (!*svc->uni_pagedict_loc) 1076 con_set_default_unimap(svc); 1077 if (!*vc->uni_pagedict_loc) 1078 con_copy_unimap(vc, svc); 1079 1080 ops = info->fbcon_par; 1081 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1082 1083 p->con_rotate = initial_rotation; 1084 if (p->con_rotate == -1) 1085 p->con_rotate = info->fbcon_rotate_hint; 1086 if (p->con_rotate == -1) 1087 p->con_rotate = FB_ROTATE_UR; 1088 1089 set_blitting_type(vc, info); 1090 1091 cols = vc->vc_cols; 1092 rows = vc->vc_rows; 1093 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1094 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1095 new_cols /= vc->vc_font.width; 1096 new_rows /= vc->vc_font.height; 1097 1098 /* 1099 * We must always set the mode. The mode of the previous console 1100 * driver could be in the same resolution but we are using different 1101 * hardware so we have to initialize the hardware. 1102 * 1103 * We need to do it in fbcon_init() to prevent screen corruption. 1104 */ 1105 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1106 if (info->fbops->fb_set_par && !ops->initialized) { 1107 ret = info->fbops->fb_set_par(info); 1108 1109 if (ret) 1110 printk(KERN_ERR "fbcon_init: detected " 1111 "unhandled fb_set_par error, " 1112 "error code %d\n", ret); 1113 } 1114 1115 ops->initialized = true; 1116 } 1117 1118 ops->graphics = 0; 1119 1120 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1121 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1122 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1123 p->scrollmode = SCROLL_MOVE; 1124 else /* default to something safe */ 1125 p->scrollmode = SCROLL_REDRAW; 1126 #endif 1127 1128 /* 1129 * ++guenther: console.c:vc_allocate() relies on initializing 1130 * vc_{cols,rows}, but we must not set those if we are only 1131 * resizing the console. 1132 */ 1133 if (init) { 1134 vc->vc_cols = new_cols; 1135 vc->vc_rows = new_rows; 1136 } else 1137 vc_resize(vc, new_cols, new_rows); 1138 1139 if (logo) 1140 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1141 1142 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1143 ops->rotate = FB_ROTATE_UR; 1144 set_blitting_type(vc, info); 1145 } 1146 1147 ops->p = &fb_display[fg_console]; 1148 } 1149 1150 static void fbcon_free_font(struct fbcon_display *p) 1151 { 1152 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1153 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1154 p->fontdata = NULL; 1155 p->userfont = 0; 1156 } 1157 1158 static void set_vc_hi_font(struct vc_data *vc, bool set); 1159 1160 static void fbcon_release_all(void) 1161 { 1162 struct fb_info *info; 1163 int i, j, mapped; 1164 1165 fbcon_for_each_registered_fb(i) { 1166 mapped = 0; 1167 info = fbcon_registered_fb[i]; 1168 1169 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1170 if (con2fb_map[j] == i) { 1171 mapped = 1; 1172 con2fb_map[j] = -1; 1173 } 1174 } 1175 1176 if (mapped) 1177 fbcon_release(info); 1178 } 1179 } 1180 1181 static void fbcon_deinit(struct vc_data *vc) 1182 { 1183 struct fbcon_display *p = &fb_display[vc->vc_num]; 1184 struct fb_info *info; 1185 struct fbcon_ops *ops; 1186 int idx; 1187 1188 fbcon_free_font(p); 1189 idx = con2fb_map[vc->vc_num]; 1190 1191 if (idx == -1) 1192 goto finished; 1193 1194 info = fbcon_registered_fb[idx]; 1195 1196 if (!info) 1197 goto finished; 1198 1199 ops = info->fbcon_par; 1200 1201 if (!ops) 1202 goto finished; 1203 1204 if (con_is_visible(vc)) 1205 fbcon_del_cursor_work(info); 1206 1207 ops->initialized = false; 1208 finished: 1209 1210 fbcon_free_font(p); 1211 vc->vc_font.data = NULL; 1212 1213 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1214 set_vc_hi_font(vc, false); 1215 1216 if (!con_is_bound(&fb_con)) 1217 fbcon_release_all(); 1218 1219 if (vc->vc_num == logo_shown) 1220 logo_shown = FBCON_LOGO_CANSHOW; 1221 1222 return; 1223 } 1224 1225 /* ====================================================================== */ 1226 1227 /* fbcon_XXX routines - interface used by the world 1228 * 1229 * This system is now divided into two levels because of complications 1230 * caused by hardware scrolling. Top level functions: 1231 * 1232 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1233 * 1234 * handles y values in range [0, scr_height-1] that correspond to real 1235 * screen positions. y_wrap shift means that first line of bitmap may be 1236 * anywhere on this display. These functions convert lineoffsets to 1237 * bitmap offsets and deal with the wrap-around case by splitting blits. 1238 * 1239 * fbcon_bmove_physical_8() -- These functions fast implementations 1240 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1241 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1242 * 1243 * WARNING: 1244 * 1245 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1246 * Implies should only really hardware scroll in rows. Only reason for 1247 * restriction is simplicity & efficiency at the moment. 1248 */ 1249 1250 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1251 unsigned int height, unsigned int width) 1252 { 1253 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1254 struct fbcon_ops *ops = info->fbcon_par; 1255 1256 struct fbcon_display *p = &fb_display[vc->vc_num]; 1257 u_int y_break; 1258 1259 if (fbcon_is_inactive(vc, info)) 1260 return; 1261 1262 if (!height || !width) 1263 return; 1264 1265 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1266 vc->vc_top = 0; 1267 /* 1268 * If the font dimensions are not an integral of the display 1269 * dimensions then the ops->clear below won't end up clearing 1270 * the margins. Call clear_margins here in case the logo 1271 * bitmap stretched into the margin area. 1272 */ 1273 fbcon_clear_margins(vc, 0); 1274 } 1275 1276 /* Split blits that cross physical y_wrap boundary */ 1277 1278 y_break = p->vrows - p->yscroll; 1279 if (sy < y_break && sy + height - 1 >= y_break) { 1280 u_int b = y_break - sy; 1281 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1282 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1283 width); 1284 } else 1285 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1286 } 1287 1288 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1289 unsigned int width) 1290 { 1291 __fbcon_clear(vc, sy, sx, 1, width); 1292 } 1293 1294 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1295 unsigned int ypos, unsigned int xpos) 1296 { 1297 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1298 struct fbcon_display *p = &fb_display[vc->vc_num]; 1299 struct fbcon_ops *ops = info->fbcon_par; 1300 1301 if (!fbcon_is_inactive(vc, info)) 1302 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1303 get_color(vc, info, scr_readw(s), 1), 1304 get_color(vc, info, scr_readw(s), 0)); 1305 } 1306 1307 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1308 { 1309 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1310 struct fbcon_ops *ops = info->fbcon_par; 1311 1312 if (!fbcon_is_inactive(vc, info)) 1313 ops->clear_margins(vc, info, margin_color, bottom_only); 1314 } 1315 1316 static void fbcon_cursor(struct vc_data *vc, bool enable) 1317 { 1318 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1319 struct fbcon_ops *ops = info->fbcon_par; 1320 int c = scr_readw((u16 *) vc->vc_pos); 1321 1322 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1323 1324 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1325 return; 1326 1327 if (vc->vc_cursor_type & CUR_SW) 1328 fbcon_del_cursor_work(info); 1329 else 1330 fbcon_add_cursor_work(info); 1331 1332 ops->cursor_flash = enable; 1333 1334 if (!ops->cursor) 1335 return; 1336 1337 ops->cursor(vc, info, enable, get_color(vc, info, c, 1), 1338 get_color(vc, info, c, 0)); 1339 } 1340 1341 static int scrollback_phys_max = 0; 1342 static int scrollback_max = 0; 1343 static int scrollback_current = 0; 1344 1345 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1346 int unit) 1347 { 1348 struct fbcon_display *p, *t; 1349 struct vc_data **default_mode, *vc; 1350 struct vc_data *svc; 1351 struct fbcon_ops *ops = info->fbcon_par; 1352 int rows, cols; 1353 1354 p = &fb_display[unit]; 1355 1356 if (var_to_display(p, var, info)) 1357 return; 1358 1359 vc = vc_cons[unit].d; 1360 1361 if (!vc) 1362 return; 1363 1364 default_mode = vc->vc_display_fg; 1365 svc = *default_mode; 1366 t = &fb_display[svc->vc_num]; 1367 1368 if (!vc->vc_font.data) { 1369 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1370 vc->vc_font.width = (*default_mode)->vc_font.width; 1371 vc->vc_font.height = (*default_mode)->vc_font.height; 1372 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1373 p->userfont = t->userfont; 1374 if (p->userfont) 1375 REFCOUNT(p->fontdata)++; 1376 } 1377 1378 var->activate = FB_ACTIVATE_NOW; 1379 info->var.activate = var->activate; 1380 var->yoffset = info->var.yoffset; 1381 var->xoffset = info->var.xoffset; 1382 fb_set_var(info, var); 1383 ops->var = info->var; 1384 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1385 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1386 if (vc->vc_font.charcount == 256) { 1387 vc->vc_hi_font_mask = 0; 1388 } else { 1389 vc->vc_hi_font_mask = 0x100; 1390 if (vc->vc_can_do_color) 1391 vc->vc_complement_mask <<= 1; 1392 } 1393 1394 if (!*svc->uni_pagedict_loc) 1395 con_set_default_unimap(svc); 1396 if (!*vc->uni_pagedict_loc) 1397 con_copy_unimap(vc, svc); 1398 1399 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1400 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1401 cols /= vc->vc_font.width; 1402 rows /= vc->vc_font.height; 1403 vc_resize(vc, cols, rows); 1404 1405 if (con_is_visible(vc)) { 1406 update_screen(vc); 1407 } 1408 } 1409 1410 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1411 { 1412 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1413 struct fbcon_ops *ops = info->fbcon_par; 1414 struct fbcon_display *p = &fb_display[vc->vc_num]; 1415 1416 p->yscroll += count; 1417 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1418 p->yscroll -= p->vrows; 1419 ops->var.xoffset = 0; 1420 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1421 ops->var.vmode |= FB_VMODE_YWRAP; 1422 ops->update_start(info); 1423 scrollback_max += count; 1424 if (scrollback_max > scrollback_phys_max) 1425 scrollback_max = scrollback_phys_max; 1426 scrollback_current = 0; 1427 } 1428 1429 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1430 { 1431 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1432 struct fbcon_ops *ops = info->fbcon_par; 1433 struct fbcon_display *p = &fb_display[vc->vc_num]; 1434 1435 p->yscroll -= count; 1436 if (p->yscroll < 0) /* Deal with wrap */ 1437 p->yscroll += p->vrows; 1438 ops->var.xoffset = 0; 1439 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1440 ops->var.vmode |= FB_VMODE_YWRAP; 1441 ops->update_start(info); 1442 scrollback_max -= count; 1443 if (scrollback_max < 0) 1444 scrollback_max = 0; 1445 scrollback_current = 0; 1446 } 1447 1448 static __inline__ void ypan_up(struct vc_data *vc, int count) 1449 { 1450 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1451 struct fbcon_display *p = &fb_display[vc->vc_num]; 1452 struct fbcon_ops *ops = info->fbcon_par; 1453 1454 p->yscroll += count; 1455 if (p->yscroll > p->vrows - vc->vc_rows) { 1456 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1457 0, 0, 0, vc->vc_rows, vc->vc_cols); 1458 p->yscroll -= p->vrows - vc->vc_rows; 1459 } 1460 1461 ops->var.xoffset = 0; 1462 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1463 ops->var.vmode &= ~FB_VMODE_YWRAP; 1464 ops->update_start(info); 1465 fbcon_clear_margins(vc, 1); 1466 scrollback_max += count; 1467 if (scrollback_max > scrollback_phys_max) 1468 scrollback_max = scrollback_phys_max; 1469 scrollback_current = 0; 1470 } 1471 1472 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1473 { 1474 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1475 struct fbcon_ops *ops = info->fbcon_par; 1476 struct fbcon_display *p = &fb_display[vc->vc_num]; 1477 1478 p->yscroll += count; 1479 1480 if (p->yscroll > p->vrows - vc->vc_rows) { 1481 p->yscroll -= p->vrows - vc->vc_rows; 1482 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1483 } 1484 1485 ops->var.xoffset = 0; 1486 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1487 ops->var.vmode &= ~FB_VMODE_YWRAP; 1488 ops->update_start(info); 1489 fbcon_clear_margins(vc, 1); 1490 scrollback_max += count; 1491 if (scrollback_max > scrollback_phys_max) 1492 scrollback_max = scrollback_phys_max; 1493 scrollback_current = 0; 1494 } 1495 1496 static __inline__ void ypan_down(struct vc_data *vc, int count) 1497 { 1498 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1499 struct fbcon_display *p = &fb_display[vc->vc_num]; 1500 struct fbcon_ops *ops = info->fbcon_par; 1501 1502 p->yscroll -= count; 1503 if (p->yscroll < 0) { 1504 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1505 0, vc->vc_rows, vc->vc_cols); 1506 p->yscroll += p->vrows - vc->vc_rows; 1507 } 1508 1509 ops->var.xoffset = 0; 1510 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1511 ops->var.vmode &= ~FB_VMODE_YWRAP; 1512 ops->update_start(info); 1513 fbcon_clear_margins(vc, 1); 1514 scrollback_max -= count; 1515 if (scrollback_max < 0) 1516 scrollback_max = 0; 1517 scrollback_current = 0; 1518 } 1519 1520 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1521 { 1522 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1523 struct fbcon_ops *ops = info->fbcon_par; 1524 struct fbcon_display *p = &fb_display[vc->vc_num]; 1525 1526 p->yscroll -= count; 1527 1528 if (p->yscroll < 0) { 1529 p->yscroll += p->vrows - vc->vc_rows; 1530 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1531 } 1532 1533 ops->var.xoffset = 0; 1534 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1535 ops->var.vmode &= ~FB_VMODE_YWRAP; 1536 ops->update_start(info); 1537 fbcon_clear_margins(vc, 1); 1538 scrollback_max -= count; 1539 if (scrollback_max < 0) 1540 scrollback_max = 0; 1541 scrollback_current = 0; 1542 } 1543 1544 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1545 int line, int count, int dy) 1546 { 1547 unsigned short *s = (unsigned short *) 1548 (vc->vc_origin + vc->vc_size_row * line); 1549 1550 while (count--) { 1551 unsigned short *start = s; 1552 unsigned short *le = advance_row(s, 1); 1553 unsigned short c; 1554 int x = 0; 1555 unsigned short attr = 1; 1556 1557 do { 1558 c = scr_readw(s); 1559 if (attr != (c & 0xff00)) { 1560 attr = c & 0xff00; 1561 if (s > start) { 1562 fbcon_putcs(vc, start, s - start, 1563 dy, x); 1564 x += s - start; 1565 start = s; 1566 } 1567 } 1568 console_conditional_schedule(); 1569 s++; 1570 } while (s < le); 1571 if (s > start) 1572 fbcon_putcs(vc, start, s - start, dy, x); 1573 console_conditional_schedule(); 1574 dy++; 1575 } 1576 } 1577 1578 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1579 struct fbcon_display *p, int line, int count, int ycount) 1580 { 1581 int offset = ycount * vc->vc_cols; 1582 unsigned short *d = (unsigned short *) 1583 (vc->vc_origin + vc->vc_size_row * line); 1584 unsigned short *s = d + offset; 1585 struct fbcon_ops *ops = info->fbcon_par; 1586 1587 while (count--) { 1588 unsigned short *start = s; 1589 unsigned short *le = advance_row(s, 1); 1590 unsigned short c; 1591 int x = 0; 1592 1593 do { 1594 c = scr_readw(s); 1595 1596 if (c == scr_readw(d)) { 1597 if (s > start) { 1598 ops->bmove(vc, info, line + ycount, x, 1599 line, x, 1, s-start); 1600 x += s - start + 1; 1601 start = s + 1; 1602 } else { 1603 x++; 1604 start++; 1605 } 1606 } 1607 1608 scr_writew(c, d); 1609 console_conditional_schedule(); 1610 s++; 1611 d++; 1612 } while (s < le); 1613 if (s > start) 1614 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1615 s-start); 1616 console_conditional_schedule(); 1617 if (ycount > 0) 1618 line++; 1619 else { 1620 line--; 1621 /* NOTE: We subtract two lines from these pointers */ 1622 s -= vc->vc_size_row; 1623 d -= vc->vc_size_row; 1624 } 1625 } 1626 } 1627 1628 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1629 { 1630 unsigned short *d = (unsigned short *) 1631 (vc->vc_origin + vc->vc_size_row * line); 1632 unsigned short *s = d + offset; 1633 1634 while (count--) { 1635 unsigned short *start = s; 1636 unsigned short *le = advance_row(s, 1); 1637 unsigned short c; 1638 int x = 0; 1639 unsigned short attr = 1; 1640 1641 do { 1642 c = scr_readw(s); 1643 if (attr != (c & 0xff00)) { 1644 attr = c & 0xff00; 1645 if (s > start) { 1646 fbcon_putcs(vc, start, s - start, 1647 line, x); 1648 x += s - start; 1649 start = s; 1650 } 1651 } 1652 if (c == scr_readw(d)) { 1653 if (s > start) { 1654 fbcon_putcs(vc, start, s - start, 1655 line, x); 1656 x += s - start + 1; 1657 start = s + 1; 1658 } else { 1659 x++; 1660 start++; 1661 } 1662 } 1663 scr_writew(c, d); 1664 console_conditional_schedule(); 1665 s++; 1666 d++; 1667 } while (s < le); 1668 if (s > start) 1669 fbcon_putcs(vc, start, s - start, line, x); 1670 console_conditional_schedule(); 1671 if (offset > 0) 1672 line++; 1673 else { 1674 line--; 1675 /* NOTE: We subtract two lines from these pointers */ 1676 s -= vc->vc_size_row; 1677 d -= vc->vc_size_row; 1678 } 1679 } 1680 } 1681 1682 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1683 int dy, int dx, int height, int width, u_int y_break) 1684 { 1685 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1686 struct fbcon_ops *ops = info->fbcon_par; 1687 u_int b; 1688 1689 if (sy < y_break && sy + height > y_break) { 1690 b = y_break - sy; 1691 if (dy < sy) { /* Avoid trashing self */ 1692 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1693 y_break); 1694 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1695 height - b, width, y_break); 1696 } else { 1697 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1698 height - b, width, y_break); 1699 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1700 y_break); 1701 } 1702 return; 1703 } 1704 1705 if (dy < y_break && dy + height > y_break) { 1706 b = y_break - dy; 1707 if (dy < sy) { /* Avoid trashing self */ 1708 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1709 y_break); 1710 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1711 height - b, width, y_break); 1712 } else { 1713 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1714 height - b, width, y_break); 1715 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1716 y_break); 1717 } 1718 return; 1719 } 1720 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1721 height, width); 1722 } 1723 1724 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1725 int height, int width) 1726 { 1727 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1728 struct fbcon_display *p = &fb_display[vc->vc_num]; 1729 1730 if (fbcon_is_inactive(vc, info)) 1731 return; 1732 1733 if (!width || !height) 1734 return; 1735 1736 /* Split blits that cross physical y_wrap case. 1737 * Pathological case involves 4 blits, better to use recursive 1738 * code rather than unrolled case 1739 * 1740 * Recursive invocations don't need to erase the cursor over and 1741 * over again, so we use fbcon_bmove_rec() 1742 */ 1743 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1744 p->vrows - p->yscroll); 1745 } 1746 1747 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1748 enum con_scroll dir, unsigned int count) 1749 { 1750 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1751 struct fbcon_display *p = &fb_display[vc->vc_num]; 1752 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1753 1754 if (fbcon_is_inactive(vc, info)) 1755 return true; 1756 1757 fbcon_cursor(vc, false); 1758 1759 /* 1760 * ++Geert: Only use ywrap/ypan if the console is in text mode 1761 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1762 * whole screen (prevents flicker). 1763 */ 1764 1765 switch (dir) { 1766 case SM_UP: 1767 if (count > vc->vc_rows) /* Maximum realistic size */ 1768 count = vc->vc_rows; 1769 switch (fb_scrollmode(p)) { 1770 case SCROLL_MOVE: 1771 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1772 count); 1773 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1774 scr_memsetw((unsigned short *) (vc->vc_origin + 1775 vc->vc_size_row * 1776 (b - count)), 1777 vc->vc_video_erase_char, 1778 vc->vc_size_row * count); 1779 return true; 1780 1781 case SCROLL_WRAP_MOVE: 1782 if (b - t - count > 3 * vc->vc_rows >> 2) { 1783 if (t > 0) 1784 fbcon_bmove(vc, 0, 0, count, 0, t, 1785 vc->vc_cols); 1786 ywrap_up(vc, count); 1787 if (vc->vc_rows - b > 0) 1788 fbcon_bmove(vc, b - count, 0, b, 0, 1789 vc->vc_rows - b, 1790 vc->vc_cols); 1791 } else if (info->flags & FBINFO_READS_FAST) 1792 fbcon_bmove(vc, t + count, 0, t, 0, 1793 b - t - count, vc->vc_cols); 1794 else 1795 goto redraw_up; 1796 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1797 break; 1798 1799 case SCROLL_PAN_REDRAW: 1800 if ((p->yscroll + count <= 1801 2 * (p->vrows - vc->vc_rows)) 1802 && ((!scroll_partial && (b - t == vc->vc_rows)) 1803 || (scroll_partial 1804 && (b - t - count > 1805 3 * vc->vc_rows >> 2)))) { 1806 if (t > 0) 1807 fbcon_redraw_move(vc, p, 0, t, count); 1808 ypan_up_redraw(vc, t, count); 1809 if (vc->vc_rows - b > 0) 1810 fbcon_redraw_move(vc, p, b, 1811 vc->vc_rows - b, b); 1812 } else 1813 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1814 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1815 break; 1816 1817 case SCROLL_PAN_MOVE: 1818 if ((p->yscroll + count <= 1819 2 * (p->vrows - vc->vc_rows)) 1820 && ((!scroll_partial && (b - t == vc->vc_rows)) 1821 || (scroll_partial 1822 && (b - t - count > 1823 3 * vc->vc_rows >> 2)))) { 1824 if (t > 0) 1825 fbcon_bmove(vc, 0, 0, count, 0, t, 1826 vc->vc_cols); 1827 ypan_up(vc, count); 1828 if (vc->vc_rows - b > 0) 1829 fbcon_bmove(vc, b - count, 0, b, 0, 1830 vc->vc_rows - b, 1831 vc->vc_cols); 1832 } else if (info->flags & FBINFO_READS_FAST) 1833 fbcon_bmove(vc, t + count, 0, t, 0, 1834 b - t - count, vc->vc_cols); 1835 else 1836 goto redraw_up; 1837 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1838 break; 1839 1840 case SCROLL_REDRAW: 1841 redraw_up: 1842 fbcon_redraw(vc, t, b - t - count, 1843 count * vc->vc_cols); 1844 __fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1845 scr_memsetw((unsigned short *) (vc->vc_origin + 1846 vc->vc_size_row * 1847 (b - count)), 1848 vc->vc_video_erase_char, 1849 vc->vc_size_row * count); 1850 return true; 1851 } 1852 break; 1853 1854 case SM_DOWN: 1855 if (count > vc->vc_rows) /* Maximum realistic size */ 1856 count = vc->vc_rows; 1857 switch (fb_scrollmode(p)) { 1858 case SCROLL_MOVE: 1859 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1860 -count); 1861 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1862 scr_memsetw((unsigned short *) (vc->vc_origin + 1863 vc->vc_size_row * 1864 t), 1865 vc->vc_video_erase_char, 1866 vc->vc_size_row * count); 1867 return true; 1868 1869 case SCROLL_WRAP_MOVE: 1870 if (b - t - count > 3 * vc->vc_rows >> 2) { 1871 if (vc->vc_rows - b > 0) 1872 fbcon_bmove(vc, b, 0, b - count, 0, 1873 vc->vc_rows - b, 1874 vc->vc_cols); 1875 ywrap_down(vc, count); 1876 if (t > 0) 1877 fbcon_bmove(vc, count, 0, 0, 0, t, 1878 vc->vc_cols); 1879 } else if (info->flags & FBINFO_READS_FAST) 1880 fbcon_bmove(vc, t, 0, t + count, 0, 1881 b - t - count, vc->vc_cols); 1882 else 1883 goto redraw_down; 1884 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1885 break; 1886 1887 case SCROLL_PAN_MOVE: 1888 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1889 && ((!scroll_partial && (b - t == vc->vc_rows)) 1890 || (scroll_partial 1891 && (b - t - count > 1892 3 * vc->vc_rows >> 2)))) { 1893 if (vc->vc_rows - b > 0) 1894 fbcon_bmove(vc, b, 0, b - count, 0, 1895 vc->vc_rows - b, 1896 vc->vc_cols); 1897 ypan_down(vc, count); 1898 if (t > 0) 1899 fbcon_bmove(vc, count, 0, 0, 0, t, 1900 vc->vc_cols); 1901 } else if (info->flags & FBINFO_READS_FAST) 1902 fbcon_bmove(vc, t, 0, t + count, 0, 1903 b - t - count, vc->vc_cols); 1904 else 1905 goto redraw_down; 1906 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1907 break; 1908 1909 case SCROLL_PAN_REDRAW: 1910 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1911 && ((!scroll_partial && (b - t == vc->vc_rows)) 1912 || (scroll_partial 1913 && (b - t - count > 1914 3 * vc->vc_rows >> 2)))) { 1915 if (vc->vc_rows - b > 0) 1916 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1917 b - count); 1918 ypan_down_redraw(vc, t, count); 1919 if (t > 0) 1920 fbcon_redraw_move(vc, p, count, t, 0); 1921 } else 1922 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1923 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1924 break; 1925 1926 case SCROLL_REDRAW: 1927 redraw_down: 1928 fbcon_redraw(vc, b - 1, b - t - count, 1929 -count * vc->vc_cols); 1930 __fbcon_clear(vc, t, 0, count, vc->vc_cols); 1931 scr_memsetw((unsigned short *) (vc->vc_origin + 1932 vc->vc_size_row * 1933 t), 1934 vc->vc_video_erase_char, 1935 vc->vc_size_row * count); 1936 return true; 1937 } 1938 } 1939 return false; 1940 } 1941 1942 1943 static void updatescrollmode_accel(struct fbcon_display *p, 1944 struct fb_info *info, 1945 struct vc_data *vc) 1946 { 1947 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1948 struct fbcon_ops *ops = info->fbcon_par; 1949 int cap = info->flags; 1950 u16 t = 0; 1951 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1952 info->fix.xpanstep); 1953 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1954 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1955 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1956 info->var.xres_virtual); 1957 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1958 divides(ypan, vc->vc_font.height) && vyres > yres; 1959 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1960 divides(ywrap, vc->vc_font.height) && 1961 divides(vc->vc_font.height, vyres) && 1962 divides(vc->vc_font.height, yres); 1963 int reading_fast = cap & FBINFO_READS_FAST; 1964 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1965 !(cap & FBINFO_HWACCEL_DISABLED); 1966 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1967 !(cap & FBINFO_HWACCEL_DISABLED); 1968 1969 if (good_wrap || good_pan) { 1970 if (reading_fast || fast_copyarea) 1971 p->scrollmode = good_wrap ? 1972 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1973 else 1974 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1975 SCROLL_PAN_REDRAW; 1976 } else { 1977 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1978 p->scrollmode = SCROLL_MOVE; 1979 else 1980 p->scrollmode = SCROLL_REDRAW; 1981 } 1982 #endif 1983 } 1984 1985 static void updatescrollmode(struct fbcon_display *p, 1986 struct fb_info *info, 1987 struct vc_data *vc) 1988 { 1989 struct fbcon_ops *ops = info->fbcon_par; 1990 int fh = vc->vc_font.height; 1991 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1992 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1993 info->var.xres_virtual); 1994 1995 p->vrows = vyres/fh; 1996 if (yres > (fh * (vc->vc_rows + 1))) 1997 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1998 if ((yres % fh) && (vyres % fh < yres % fh)) 1999 p->vrows--; 2000 2001 /* update scrollmode in case hardware acceleration is used */ 2002 updatescrollmode_accel(p, info, vc); 2003 } 2004 2005 #define PITCH(w) (((w) + 7) >> 3) 2006 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2007 2008 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2009 unsigned int height, bool from_user) 2010 { 2011 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2012 struct fbcon_ops *ops = info->fbcon_par; 2013 struct fbcon_display *p = &fb_display[vc->vc_num]; 2014 struct fb_var_screeninfo var = info->var; 2015 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2016 2017 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2018 int size; 2019 int pitch = PITCH(vc->vc_font.width); 2020 2021 /* 2022 * If user font, ensure that a possible change to user font 2023 * height or width will not allow a font data out-of-bounds access. 2024 * NOTE: must use original charcount in calculation as font 2025 * charcount can change and cannot be used to determine the 2026 * font data allocated size. 2027 */ 2028 if (pitch <= 0) 2029 return -EINVAL; 2030 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2031 if (size > FNTSIZE(vc->vc_font.data)) 2032 return -EINVAL; 2033 } 2034 2035 virt_w = FBCON_SWAP(ops->rotate, width, height); 2036 virt_h = FBCON_SWAP(ops->rotate, height, width); 2037 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2038 vc->vc_font.height); 2039 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2040 vc->vc_font.width); 2041 var.xres = virt_w * virt_fw; 2042 var.yres = virt_h * virt_fh; 2043 x_diff = info->var.xres - var.xres; 2044 y_diff = info->var.yres - var.yres; 2045 if (x_diff < 0 || x_diff > virt_fw || 2046 y_diff < 0 || y_diff > virt_fh) { 2047 const struct fb_videomode *mode; 2048 2049 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2050 mode = fb_find_best_mode(&var, &info->modelist); 2051 if (mode == NULL) 2052 return -EINVAL; 2053 display_to_var(&var, p); 2054 fb_videomode_to_var(&var, mode); 2055 2056 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2057 return -EINVAL; 2058 2059 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2060 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2061 var.activate = FB_ACTIVATE_NOW | 2062 FB_ACTIVATE_FORCE; 2063 fb_set_var(info, &var); 2064 } 2065 var_to_display(p, &info->var, info); 2066 ops->var = info->var; 2067 } 2068 updatescrollmode(p, info, vc); 2069 return 0; 2070 } 2071 2072 static bool fbcon_switch(struct vc_data *vc) 2073 { 2074 struct fb_info *info, *old_info = NULL; 2075 struct fbcon_ops *ops; 2076 struct fbcon_display *p = &fb_display[vc->vc_num]; 2077 struct fb_var_screeninfo var; 2078 int i, ret, prev_console; 2079 2080 info = fbcon_info_from_console(vc->vc_num); 2081 ops = info->fbcon_par; 2082 2083 if (logo_shown >= 0) { 2084 struct vc_data *conp2 = vc_cons[logo_shown].d; 2085 2086 if (conp2->vc_top == logo_lines 2087 && conp2->vc_bottom == conp2->vc_rows) 2088 conp2->vc_top = 0; 2089 logo_shown = FBCON_LOGO_CANSHOW; 2090 } 2091 2092 prev_console = ops->currcon; 2093 if (prev_console != -1) 2094 old_info = fbcon_info_from_console(prev_console); 2095 /* 2096 * FIXME: If we have multiple fbdev's loaded, we need to 2097 * update all info->currcon. Perhaps, we can place this 2098 * in a centralized structure, but this might break some 2099 * drivers. 2100 * 2101 * info->currcon = vc->vc_num; 2102 */ 2103 fbcon_for_each_registered_fb(i) { 2104 if (fbcon_registered_fb[i]->fbcon_par) { 2105 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2106 2107 o->currcon = vc->vc_num; 2108 } 2109 } 2110 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2111 display_to_var(&var, p); 2112 var.activate = FB_ACTIVATE_NOW; 2113 2114 /* 2115 * make sure we don't unnecessarily trip the memcmp() 2116 * in fb_set_var() 2117 */ 2118 info->var.activate = var.activate; 2119 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2120 fb_set_var(info, &var); 2121 ops->var = info->var; 2122 2123 if (old_info != NULL && (old_info != info || 2124 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2125 if (info->fbops->fb_set_par) { 2126 ret = info->fbops->fb_set_par(info); 2127 2128 if (ret) 2129 printk(KERN_ERR "fbcon_switch: detected " 2130 "unhandled fb_set_par error, " 2131 "error code %d\n", ret); 2132 } 2133 2134 if (old_info != info) 2135 fbcon_del_cursor_work(old_info); 2136 } 2137 2138 if (fbcon_is_inactive(vc, info) || 2139 ops->blank_state != FB_BLANK_UNBLANK) 2140 fbcon_del_cursor_work(info); 2141 else 2142 fbcon_add_cursor_work(info); 2143 2144 set_blitting_type(vc, info); 2145 ops->cursor_reset = 1; 2146 2147 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2148 ops->rotate = FB_ROTATE_UR; 2149 set_blitting_type(vc, info); 2150 } 2151 2152 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2153 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2154 2155 if (vc->vc_font.charcount > 256) 2156 vc->vc_complement_mask <<= 1; 2157 2158 updatescrollmode(p, info, vc); 2159 2160 switch (fb_scrollmode(p)) { 2161 case SCROLL_WRAP_MOVE: 2162 scrollback_phys_max = p->vrows - vc->vc_rows; 2163 break; 2164 case SCROLL_PAN_MOVE: 2165 case SCROLL_PAN_REDRAW: 2166 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2167 if (scrollback_phys_max < 0) 2168 scrollback_phys_max = 0; 2169 break; 2170 default: 2171 scrollback_phys_max = 0; 2172 break; 2173 } 2174 2175 scrollback_max = 0; 2176 scrollback_current = 0; 2177 2178 if (!fbcon_is_inactive(vc, info)) { 2179 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2180 ops->update_start(info); 2181 } 2182 2183 fbcon_set_palette(vc, color_table); 2184 fbcon_clear_margins(vc, 0); 2185 2186 if (logo_shown == FBCON_LOGO_DRAW) { 2187 2188 logo_shown = fg_console; 2189 fb_show_logo(info, ops->rotate); 2190 update_region(vc, 2191 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2192 vc->vc_size_row * (vc->vc_bottom - 2193 vc->vc_top) / 2); 2194 return false; 2195 } 2196 return true; 2197 } 2198 2199 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2200 int blank) 2201 { 2202 if (blank) { 2203 unsigned short charmask = vc->vc_hi_font_mask ? 2204 0x1ff : 0xff; 2205 unsigned short oldc; 2206 2207 oldc = vc->vc_video_erase_char; 2208 vc->vc_video_erase_char &= charmask; 2209 __fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2210 vc->vc_video_erase_char = oldc; 2211 } 2212 } 2213 2214 static bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2215 bool mode_switch) 2216 { 2217 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2218 struct fbcon_ops *ops = info->fbcon_par; 2219 2220 if (mode_switch) { 2221 struct fb_var_screeninfo var = info->var; 2222 2223 ops->graphics = 1; 2224 2225 if (!blank) { 2226 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2227 FB_ACTIVATE_KD_TEXT; 2228 fb_set_var(info, &var); 2229 ops->graphics = 0; 2230 ops->var = info->var; 2231 } 2232 } 2233 2234 if (!fbcon_is_inactive(vc, info)) { 2235 if (ops->blank_state != blank) { 2236 ops->blank_state = blank; 2237 fbcon_cursor(vc, !blank); 2238 ops->cursor_flash = (!blank); 2239 2240 if (fb_blank(info, blank)) 2241 fbcon_generic_blank(vc, info, blank); 2242 } 2243 2244 if (!blank) 2245 update_screen(vc); 2246 } 2247 2248 if (mode_switch || fbcon_is_inactive(vc, info) || 2249 ops->blank_state != FB_BLANK_UNBLANK) 2250 fbcon_del_cursor_work(info); 2251 else 2252 fbcon_add_cursor_work(info); 2253 2254 return false; 2255 } 2256 2257 static void fbcon_debug_enter(struct vc_data *vc) 2258 { 2259 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2260 struct fbcon_ops *ops = info->fbcon_par; 2261 2262 ops->save_graphics = ops->graphics; 2263 ops->graphics = 0; 2264 if (info->fbops->fb_debug_enter) 2265 info->fbops->fb_debug_enter(info); 2266 fbcon_set_palette(vc, color_table); 2267 } 2268 2269 static void fbcon_debug_leave(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->graphics = ops->save_graphics; 2275 if (info->fbops->fb_debug_leave) 2276 info->fbops->fb_debug_leave(info); 2277 } 2278 2279 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2280 { 2281 u8 *fontdata = vc->vc_font.data; 2282 u8 *data = font->data; 2283 int i, j; 2284 2285 font->width = vc->vc_font.width; 2286 font->height = vc->vc_font.height; 2287 if (font->height > vpitch) 2288 return -ENOSPC; 2289 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2290 if (!font->data) 2291 return 0; 2292 2293 if (font->width <= 8) { 2294 j = vc->vc_font.height; 2295 if (font->charcount * j > FNTSIZE(fontdata)) 2296 return -EINVAL; 2297 2298 for (i = 0; i < font->charcount; i++) { 2299 memcpy(data, fontdata, j); 2300 memset(data + j, 0, vpitch - j); 2301 data += vpitch; 2302 fontdata += j; 2303 } 2304 } else if (font->width <= 16) { 2305 j = vc->vc_font.height * 2; 2306 if (font->charcount * j > FNTSIZE(fontdata)) 2307 return -EINVAL; 2308 2309 for (i = 0; i < font->charcount; i++) { 2310 memcpy(data, fontdata, j); 2311 memset(data + j, 0, 2*vpitch - j); 2312 data += 2*vpitch; 2313 fontdata += j; 2314 } 2315 } else if (font->width <= 24) { 2316 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2317 return -EINVAL; 2318 2319 for (i = 0; i < font->charcount; i++) { 2320 for (j = 0; j < vc->vc_font.height; j++) { 2321 *data++ = fontdata[0]; 2322 *data++ = fontdata[1]; 2323 *data++ = fontdata[2]; 2324 fontdata += sizeof(u32); 2325 } 2326 memset(data, 0, 3 * (vpitch - j)); 2327 data += 3 * (vpitch - j); 2328 } 2329 } else { 2330 j = vc->vc_font.height * 4; 2331 if (font->charcount * j > FNTSIZE(fontdata)) 2332 return -EINVAL; 2333 2334 for (i = 0; i < font->charcount; i++) { 2335 memcpy(data, fontdata, j); 2336 memset(data + j, 0, 4 * vpitch - j); 2337 data += 4 * vpitch; 2338 fontdata += j; 2339 } 2340 } 2341 return 0; 2342 } 2343 2344 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2345 static void set_vc_hi_font(struct vc_data *vc, bool set) 2346 { 2347 if (!set) { 2348 vc->vc_hi_font_mask = 0; 2349 if (vc->vc_can_do_color) { 2350 vc->vc_complement_mask >>= 1; 2351 vc->vc_s_complement_mask >>= 1; 2352 } 2353 2354 /* ++Edmund: reorder the attribute bits */ 2355 if (vc->vc_can_do_color) { 2356 unsigned short *cp = 2357 (unsigned short *) vc->vc_origin; 2358 int count = vc->vc_screenbuf_size / 2; 2359 unsigned short c; 2360 for (; count > 0; count--, cp++) { 2361 c = scr_readw(cp); 2362 scr_writew(((c & 0xfe00) >> 1) | 2363 (c & 0xff), cp); 2364 } 2365 c = vc->vc_video_erase_char; 2366 vc->vc_video_erase_char = 2367 ((c & 0xfe00) >> 1) | (c & 0xff); 2368 vc->vc_attr >>= 1; 2369 } 2370 } else { 2371 vc->vc_hi_font_mask = 0x100; 2372 if (vc->vc_can_do_color) { 2373 vc->vc_complement_mask <<= 1; 2374 vc->vc_s_complement_mask <<= 1; 2375 } 2376 2377 /* ++Edmund: reorder the attribute bits */ 2378 { 2379 unsigned short *cp = 2380 (unsigned short *) vc->vc_origin; 2381 int count = vc->vc_screenbuf_size / 2; 2382 unsigned short c; 2383 for (; count > 0; count--, cp++) { 2384 unsigned short newc; 2385 c = scr_readw(cp); 2386 if (vc->vc_can_do_color) 2387 newc = 2388 ((c & 0xff00) << 1) | (c & 2389 0xff); 2390 else 2391 newc = c & ~0x100; 2392 scr_writew(newc, cp); 2393 } 2394 c = vc->vc_video_erase_char; 2395 if (vc->vc_can_do_color) { 2396 vc->vc_video_erase_char = 2397 ((c & 0xff00) << 1) | (c & 0xff); 2398 vc->vc_attr <<= 1; 2399 } else 2400 vc->vc_video_erase_char = c & ~0x100; 2401 } 2402 } 2403 } 2404 2405 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2406 const u8 * data, int userfont) 2407 { 2408 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2409 struct fbcon_ops *ops = info->fbcon_par; 2410 struct fbcon_display *p = &fb_display[vc->vc_num]; 2411 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2412 u8 *old_data = vc->vc_font.data; 2413 2414 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2415 vc->vc_font.data = (void *)(p->fontdata = data); 2416 old_userfont = p->userfont; 2417 if ((p->userfont = userfont)) 2418 REFCOUNT(data)++; 2419 2420 old_width = vc->vc_font.width; 2421 old_height = vc->vc_font.height; 2422 old_charcount = vc->vc_font.charcount; 2423 2424 vc->vc_font.width = w; 2425 vc->vc_font.height = h; 2426 vc->vc_font.charcount = charcount; 2427 if (vc->vc_hi_font_mask && charcount == 256) 2428 set_vc_hi_font(vc, false); 2429 else if (!vc->vc_hi_font_mask && charcount == 512) 2430 set_vc_hi_font(vc, true); 2431 2432 if (resize) { 2433 int cols, rows; 2434 2435 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2436 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2437 cols /= w; 2438 rows /= h; 2439 ret = vc_resize(vc, cols, rows); 2440 if (ret) 2441 goto err_out; 2442 } else if (con_is_visible(vc) 2443 && vc->vc_mode == KD_TEXT) { 2444 fbcon_clear_margins(vc, 0); 2445 update_screen(vc); 2446 } 2447 2448 if (old_userfont && (--REFCOUNT(old_data) == 0)) 2449 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2450 return 0; 2451 2452 err_out: 2453 p->fontdata = old_data; 2454 vc->vc_font.data = old_data; 2455 2456 if (userfont) { 2457 p->userfont = old_userfont; 2458 if (--REFCOUNT(data) == 0) 2459 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2460 } 2461 2462 vc->vc_font.width = old_width; 2463 vc->vc_font.height = old_height; 2464 vc->vc_font.charcount = old_charcount; 2465 2466 return ret; 2467 } 2468 2469 /* 2470 * User asked to set font; we are guaranteed that charcount does not exceed 512 2471 * but lets not assume that, since charcount of 512 is small for unicode support. 2472 */ 2473 2474 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2475 unsigned int vpitch, unsigned int flags) 2476 { 2477 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2478 unsigned charcount = font->charcount; 2479 int w = font->width; 2480 int h = font->height; 2481 int size; 2482 int i, csum; 2483 u8 *new_data, *data = font->data; 2484 int pitch = PITCH(font->width); 2485 2486 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2487 * If not this check should be changed to charcount < 256 */ 2488 if (charcount != 256 && charcount != 512) 2489 return -EINVAL; 2490 2491 /* font bigger than screen resolution ? */ 2492 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2493 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2494 return -EINVAL; 2495 2496 if (font->width > FB_MAX_BLIT_WIDTH || font->height > FB_MAX_BLIT_HEIGHT) 2497 return -EINVAL; 2498 2499 /* Make sure drawing engine can handle the font */ 2500 if (!test_bit(font->width - 1, info->pixmap.blit_x) || 2501 !test_bit(font->height - 1, info->pixmap.blit_y)) 2502 return -EINVAL; 2503 2504 /* Make sure driver can handle the font length */ 2505 if (fbcon_invalid_charcount(info, charcount)) 2506 return -EINVAL; 2507 2508 size = CALC_FONTSZ(h, pitch, charcount); 2509 2510 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2511 2512 if (!new_data) 2513 return -ENOMEM; 2514 2515 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2516 2517 new_data += FONT_EXTRA_WORDS * sizeof(int); 2518 FNTSIZE(new_data) = size; 2519 REFCOUNT(new_data) = 0; /* usage counter */ 2520 for (i=0; i< charcount; i++) { 2521 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2522 } 2523 2524 /* Since linux has a nice crc32 function use it for counting font 2525 * checksums. */ 2526 csum = crc32(0, new_data, size); 2527 2528 FNTSUM(new_data) = csum; 2529 /* Check if the same font is on some other console already */ 2530 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2531 struct vc_data *tmp = vc_cons[i].d; 2532 2533 if (fb_display[i].userfont && 2534 fb_display[i].fontdata && 2535 FNTSUM(fb_display[i].fontdata) == csum && 2536 FNTSIZE(fb_display[i].fontdata) == size && 2537 tmp->vc_font.width == w && 2538 !memcmp(fb_display[i].fontdata, new_data, size)) { 2539 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2540 new_data = (u8 *)fb_display[i].fontdata; 2541 break; 2542 } 2543 } 2544 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2545 } 2546 2547 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2548 const char *name) 2549 { 2550 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2551 const struct font_desc *f; 2552 2553 if (!name) 2554 f = get_default_font(info->var.xres, info->var.yres, 2555 info->pixmap.blit_x, info->pixmap.blit_y); 2556 else if (!(f = find_font(name))) 2557 return -ENOENT; 2558 2559 font->width = f->width; 2560 font->height = f->height; 2561 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2562 } 2563 2564 static u16 palette_red[16]; 2565 static u16 palette_green[16]; 2566 static u16 palette_blue[16]; 2567 2568 static struct fb_cmap palette_cmap = { 2569 0, 16, palette_red, palette_green, palette_blue, NULL 2570 }; 2571 2572 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2573 { 2574 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2575 int i, j, k, depth; 2576 u8 val; 2577 2578 if (fbcon_is_inactive(vc, info)) 2579 return; 2580 2581 if (!con_is_visible(vc)) 2582 return; 2583 2584 depth = fb_get_color_depth(&info->var, &info->fix); 2585 if (depth > 3) { 2586 for (i = j = 0; i < 16; i++) { 2587 k = table[i]; 2588 val = vc->vc_palette[j++]; 2589 palette_red[k] = (val << 8) | val; 2590 val = vc->vc_palette[j++]; 2591 palette_green[k] = (val << 8) | val; 2592 val = vc->vc_palette[j++]; 2593 palette_blue[k] = (val << 8) | val; 2594 } 2595 palette_cmap.len = 16; 2596 palette_cmap.start = 0; 2597 /* 2598 * If framebuffer is capable of less than 16 colors, 2599 * use default palette of fbcon. 2600 */ 2601 } else 2602 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2603 2604 fb_set_cmap(&palette_cmap, info); 2605 } 2606 2607 /* As we might be inside of softback, we may work with non-contiguous buffer, 2608 that's why we have to use a separate routine. */ 2609 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2610 { 2611 while (cnt--) { 2612 u16 a = scr_readw(p); 2613 if (!vc->vc_can_do_color) 2614 a ^= 0x0800; 2615 else if (vc->vc_hi_font_mask == 0x100) 2616 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2617 (((a) & 0x0e00) << 4); 2618 else 2619 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2620 (((a) & 0x0700) << 4); 2621 scr_writew(a, p++); 2622 } 2623 } 2624 2625 void fbcon_suspended(struct fb_info *info) 2626 { 2627 struct vc_data *vc = NULL; 2628 struct fbcon_ops *ops = info->fbcon_par; 2629 2630 if (!ops || ops->currcon < 0) 2631 return; 2632 vc = vc_cons[ops->currcon].d; 2633 2634 /* Clear cursor, restore saved data */ 2635 fbcon_cursor(vc, false); 2636 } 2637 2638 void fbcon_resumed(struct fb_info *info) 2639 { 2640 struct vc_data *vc; 2641 struct fbcon_ops *ops = info->fbcon_par; 2642 2643 if (!ops || ops->currcon < 0) 2644 return; 2645 vc = vc_cons[ops->currcon].d; 2646 2647 update_screen(vc); 2648 } 2649 2650 static void fbcon_modechanged(struct fb_info *info) 2651 { 2652 struct fbcon_ops *ops = info->fbcon_par; 2653 struct vc_data *vc; 2654 struct fbcon_display *p; 2655 int rows, cols; 2656 2657 if (!ops || ops->currcon < 0) 2658 return; 2659 vc = vc_cons[ops->currcon].d; 2660 if (vc->vc_mode != KD_TEXT || 2661 fbcon_info_from_console(ops->currcon) != info) 2662 return; 2663 2664 p = &fb_display[vc->vc_num]; 2665 set_blitting_type(vc, info); 2666 2667 if (con_is_visible(vc)) { 2668 var_to_display(p, &info->var, info); 2669 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2670 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2671 cols /= vc->vc_font.width; 2672 rows /= vc->vc_font.height; 2673 vc_resize(vc, cols, rows); 2674 updatescrollmode(p, info, vc); 2675 scrollback_max = 0; 2676 scrollback_current = 0; 2677 2678 if (!fbcon_is_inactive(vc, info)) { 2679 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2680 ops->update_start(info); 2681 } 2682 2683 fbcon_set_palette(vc, color_table); 2684 update_screen(vc); 2685 } 2686 } 2687 2688 static void fbcon_set_all_vcs(struct fb_info *info) 2689 { 2690 struct fbcon_ops *ops = info->fbcon_par; 2691 struct vc_data *vc; 2692 struct fbcon_display *p; 2693 int i, rows, cols, fg = -1; 2694 2695 if (!ops || ops->currcon < 0) 2696 return; 2697 2698 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2699 vc = vc_cons[i].d; 2700 if (!vc || vc->vc_mode != KD_TEXT || 2701 fbcon_info_from_console(i) != info) 2702 continue; 2703 2704 if (con_is_visible(vc)) { 2705 fg = i; 2706 continue; 2707 } 2708 2709 p = &fb_display[vc->vc_num]; 2710 set_blitting_type(vc, info); 2711 var_to_display(p, &info->var, info); 2712 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2713 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2714 cols /= vc->vc_font.width; 2715 rows /= vc->vc_font.height; 2716 vc_resize(vc, cols, rows); 2717 } 2718 2719 if (fg != -1) 2720 fbcon_modechanged(info); 2721 } 2722 2723 2724 void fbcon_update_vcs(struct fb_info *info, bool all) 2725 { 2726 if (all) 2727 fbcon_set_all_vcs(info); 2728 else 2729 fbcon_modechanged(info); 2730 } 2731 EXPORT_SYMBOL(fbcon_update_vcs); 2732 2733 /* let fbcon check if it supports a new screen resolution */ 2734 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2735 { 2736 struct fbcon_ops *ops = info->fbcon_par; 2737 struct vc_data *vc; 2738 unsigned int i; 2739 2740 WARN_CONSOLE_UNLOCKED(); 2741 2742 if (!ops) 2743 return 0; 2744 2745 /* prevent setting a screen size which is smaller than font size */ 2746 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2747 vc = vc_cons[i].d; 2748 if (!vc || vc->vc_mode != KD_TEXT || 2749 fbcon_info_from_console(i) != info) 2750 continue; 2751 2752 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2753 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2754 return -EINVAL; 2755 } 2756 2757 return 0; 2758 } 2759 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2760 2761 int fbcon_mode_deleted(struct fb_info *info, 2762 struct fb_videomode *mode) 2763 { 2764 struct fb_info *fb_info; 2765 struct fbcon_display *p; 2766 int i, j, found = 0; 2767 2768 /* before deletion, ensure that mode is not in use */ 2769 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2770 j = con2fb_map[i]; 2771 if (j == -1) 2772 continue; 2773 fb_info = fbcon_registered_fb[j]; 2774 if (fb_info != info) 2775 continue; 2776 p = &fb_display[i]; 2777 if (!p || !p->mode) 2778 continue; 2779 if (fb_mode_is_equal(p->mode, mode)) { 2780 found = 1; 2781 break; 2782 } 2783 } 2784 return found; 2785 } 2786 2787 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2788 static void fbcon_unbind(void) 2789 { 2790 int ret; 2791 2792 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2793 fbcon_is_default); 2794 2795 if (!ret) 2796 fbcon_has_console_bind = 0; 2797 } 2798 #else 2799 static inline void fbcon_unbind(void) {} 2800 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2801 2802 void fbcon_fb_unbind(struct fb_info *info) 2803 { 2804 int i, new_idx = -1; 2805 int idx = info->node; 2806 2807 console_lock(); 2808 2809 if (!fbcon_has_console_bind) { 2810 console_unlock(); 2811 return; 2812 } 2813 2814 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2815 if (con2fb_map[i] != idx && 2816 con2fb_map[i] != -1) { 2817 new_idx = con2fb_map[i]; 2818 break; 2819 } 2820 } 2821 2822 if (new_idx != -1) { 2823 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2824 if (con2fb_map[i] == idx) 2825 set_con2fb_map(i, new_idx, 0); 2826 } 2827 } else { 2828 struct fb_info *info = fbcon_registered_fb[idx]; 2829 2830 /* This is sort of like set_con2fb_map, except it maps 2831 * the consoles to no device and then releases the 2832 * oldinfo to free memory and cancel the cursor blink 2833 * timer. I can imagine this just becoming part of 2834 * set_con2fb_map where new_idx is -1 2835 */ 2836 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2837 if (con2fb_map[i] == idx) { 2838 con2fb_map[i] = -1; 2839 if (!search_fb_in_map(idx)) { 2840 con2fb_release_oldinfo(vc_cons[i].d, 2841 info, NULL); 2842 } 2843 } 2844 } 2845 fbcon_unbind(); 2846 } 2847 2848 console_unlock(); 2849 } 2850 2851 void fbcon_fb_unregistered(struct fb_info *info) 2852 { 2853 int i, idx; 2854 2855 console_lock(); 2856 2857 fbcon_registered_fb[info->node] = NULL; 2858 fbcon_num_registered_fb--; 2859 2860 if (deferred_takeover) { 2861 console_unlock(); 2862 return; 2863 } 2864 2865 idx = info->node; 2866 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2867 if (con2fb_map[i] == idx) 2868 con2fb_map[i] = -1; 2869 } 2870 2871 if (idx == info_idx) { 2872 info_idx = -1; 2873 2874 fbcon_for_each_registered_fb(i) { 2875 info_idx = i; 2876 break; 2877 } 2878 } 2879 2880 if (info_idx != -1) { 2881 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2882 if (con2fb_map[i] == -1) 2883 con2fb_map[i] = info_idx; 2884 } 2885 } 2886 2887 if (primary_device == idx) 2888 primary_device = -1; 2889 2890 if (!fbcon_num_registered_fb) 2891 do_unregister_con_driver(&fb_con); 2892 console_unlock(); 2893 } 2894 2895 void fbcon_remap_all(struct fb_info *info) 2896 { 2897 int i, idx = info->node; 2898 2899 console_lock(); 2900 if (deferred_takeover) { 2901 for (i = first_fb_vc; i <= last_fb_vc; i++) 2902 con2fb_map_boot[i] = idx; 2903 fbcon_map_override(); 2904 console_unlock(); 2905 return; 2906 } 2907 2908 for (i = first_fb_vc; i <= last_fb_vc; i++) 2909 set_con2fb_map(i, idx, 0); 2910 2911 if (con_is_bound(&fb_con)) { 2912 printk(KERN_INFO "fbcon: Remapping primary device, " 2913 "fb%i, to tty %i-%i\n", idx, 2914 first_fb_vc + 1, last_fb_vc + 1); 2915 info_idx = idx; 2916 } 2917 console_unlock(); 2918 } 2919 2920 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2921 static void fbcon_select_primary(struct fb_info *info) 2922 { 2923 if (!map_override && primary_device == -1 && 2924 video_is_primary_device(info->device)) { 2925 int i; 2926 2927 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2928 info->fix.id, info->node); 2929 primary_device = info->node; 2930 2931 for (i = first_fb_vc; i <= last_fb_vc; i++) 2932 con2fb_map_boot[i] = primary_device; 2933 2934 if (con_is_bound(&fb_con)) { 2935 printk(KERN_INFO "fbcon: Remapping primary device, " 2936 "fb%i, to tty %i-%i\n", info->node, 2937 first_fb_vc + 1, last_fb_vc + 1); 2938 info_idx = primary_device; 2939 } 2940 } 2941 2942 } 2943 #else 2944 static inline void fbcon_select_primary(struct fb_info *info) 2945 { 2946 return; 2947 } 2948 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2949 2950 static bool lockless_register_fb; 2951 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2952 MODULE_PARM_DESC(lockless_register_fb, 2953 "Lockless framebuffer registration for debugging [default=off]"); 2954 2955 /* called with console_lock held */ 2956 static int do_fb_registered(struct fb_info *info) 2957 { 2958 int ret = 0, i, idx; 2959 2960 WARN_CONSOLE_UNLOCKED(); 2961 2962 fbcon_registered_fb[info->node] = info; 2963 fbcon_num_registered_fb++; 2964 2965 idx = info->node; 2966 fbcon_select_primary(info); 2967 2968 if (deferred_takeover) { 2969 pr_info("fbcon: Deferring console take-over\n"); 2970 return 0; 2971 } 2972 2973 if (info_idx == -1) { 2974 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2975 if (con2fb_map_boot[i] == idx) { 2976 info_idx = idx; 2977 break; 2978 } 2979 } 2980 2981 if (info_idx != -1) 2982 ret = do_fbcon_takeover(1); 2983 } else { 2984 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2985 if (con2fb_map_boot[i] == idx) 2986 set_con2fb_map(i, idx, 0); 2987 } 2988 } 2989 2990 return ret; 2991 } 2992 2993 int fbcon_fb_registered(struct fb_info *info) 2994 { 2995 int ret; 2996 2997 if (!lockless_register_fb) 2998 console_lock(); 2999 else 3000 atomic_inc(&ignore_console_lock_warning); 3001 3002 ret = do_fb_registered(info); 3003 3004 if (!lockless_register_fb) 3005 console_unlock(); 3006 else 3007 atomic_dec(&ignore_console_lock_warning); 3008 3009 return ret; 3010 } 3011 3012 void fbcon_fb_blanked(struct fb_info *info, int blank) 3013 { 3014 struct fbcon_ops *ops = info->fbcon_par; 3015 struct vc_data *vc; 3016 3017 if (!ops || ops->currcon < 0) 3018 return; 3019 3020 vc = vc_cons[ops->currcon].d; 3021 if (vc->vc_mode != KD_TEXT || 3022 fbcon_info_from_console(ops->currcon) != info) 3023 return; 3024 3025 if (con_is_visible(vc)) { 3026 if (blank) 3027 do_blank_screen(0); 3028 else 3029 do_unblank_screen(0); 3030 } 3031 ops->blank_state = blank; 3032 } 3033 3034 void fbcon_new_modelist(struct fb_info *info) 3035 { 3036 int i; 3037 struct vc_data *vc; 3038 struct fb_var_screeninfo var; 3039 const struct fb_videomode *mode; 3040 3041 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3042 if (fbcon_info_from_console(i) != info) 3043 continue; 3044 if (!fb_display[i].mode) 3045 continue; 3046 vc = vc_cons[i].d; 3047 display_to_var(&var, &fb_display[i]); 3048 mode = fb_find_nearest_mode(fb_display[i].mode, 3049 &info->modelist); 3050 fb_videomode_to_var(&var, mode); 3051 fbcon_set_disp(info, &var, vc->vc_num); 3052 } 3053 } 3054 3055 void fbcon_get_requirement(struct fb_info *info, 3056 struct fb_blit_caps *caps) 3057 { 3058 struct vc_data *vc; 3059 3060 if (caps->flags) { 3061 int i, charcnt; 3062 3063 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3064 vc = vc_cons[i].d; 3065 if (vc && vc->vc_mode == KD_TEXT && 3066 info->node == con2fb_map[i]) { 3067 set_bit(vc->vc_font.width - 1, caps->x); 3068 set_bit(vc->vc_font.height - 1, caps->y); 3069 charcnt = vc->vc_font.charcount; 3070 if (caps->len < charcnt) 3071 caps->len = charcnt; 3072 } 3073 } 3074 } else { 3075 vc = vc_cons[fg_console].d; 3076 3077 if (vc && vc->vc_mode == KD_TEXT && 3078 info->node == con2fb_map[fg_console]) { 3079 bitmap_zero(caps->x, FB_MAX_BLIT_WIDTH); 3080 set_bit(vc->vc_font.width - 1, caps->x); 3081 bitmap_zero(caps->y, FB_MAX_BLIT_HEIGHT); 3082 set_bit(vc->vc_font.height - 1, caps->y); 3083 caps->len = vc->vc_font.charcount; 3084 } 3085 } 3086 } 3087 3088 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3089 { 3090 struct fb_con2fbmap con2fb; 3091 int ret; 3092 3093 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3094 return -EFAULT; 3095 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3096 return -EINVAL; 3097 if (con2fb.framebuffer >= FB_MAX) 3098 return -EINVAL; 3099 if (!fbcon_registered_fb[con2fb.framebuffer]) 3100 request_module("fb%d", con2fb.framebuffer); 3101 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3102 return -EINVAL; 3103 } 3104 3105 console_lock(); 3106 ret = set_con2fb_map(con2fb.console - 1, 3107 con2fb.framebuffer, 1); 3108 console_unlock(); 3109 3110 return ret; 3111 } 3112 3113 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3114 { 3115 struct fb_con2fbmap con2fb; 3116 3117 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3118 return -EFAULT; 3119 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3120 return -EINVAL; 3121 3122 console_lock(); 3123 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3124 console_unlock(); 3125 3126 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3127 } 3128 3129 /* 3130 * The console `switch' structure for the frame buffer based console 3131 */ 3132 3133 static const struct consw fb_con = { 3134 .owner = THIS_MODULE, 3135 .con_startup = fbcon_startup, 3136 .con_init = fbcon_init, 3137 .con_deinit = fbcon_deinit, 3138 .con_clear = fbcon_clear, 3139 .con_putcs = fbcon_putcs, 3140 .con_cursor = fbcon_cursor, 3141 .con_scroll = fbcon_scroll, 3142 .con_switch = fbcon_switch, 3143 .con_blank = fbcon_blank, 3144 .con_font_set = fbcon_set_font, 3145 .con_font_get = fbcon_get_font, 3146 .con_font_default = fbcon_set_def_font, 3147 .con_set_palette = fbcon_set_palette, 3148 .con_invert_region = fbcon_invert_region, 3149 .con_resize = fbcon_resize, 3150 .con_debug_enter = fbcon_debug_enter, 3151 .con_debug_leave = fbcon_debug_leave, 3152 }; 3153 3154 static ssize_t store_rotate(struct device *device, 3155 struct device_attribute *attr, const char *buf, 3156 size_t count) 3157 { 3158 struct fb_info *info; 3159 int rotate, idx; 3160 char **last = NULL; 3161 3162 console_lock(); 3163 idx = con2fb_map[fg_console]; 3164 3165 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3166 goto err; 3167 3168 info = fbcon_registered_fb[idx]; 3169 rotate = simple_strtoul(buf, last, 0); 3170 fbcon_rotate(info, rotate); 3171 err: 3172 console_unlock(); 3173 return count; 3174 } 3175 3176 static ssize_t store_rotate_all(struct device *device, 3177 struct device_attribute *attr,const char *buf, 3178 size_t count) 3179 { 3180 struct fb_info *info; 3181 int rotate, idx; 3182 char **last = NULL; 3183 3184 console_lock(); 3185 idx = con2fb_map[fg_console]; 3186 3187 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3188 goto err; 3189 3190 info = fbcon_registered_fb[idx]; 3191 rotate = simple_strtoul(buf, last, 0); 3192 fbcon_rotate_all(info, rotate); 3193 err: 3194 console_unlock(); 3195 return count; 3196 } 3197 3198 static ssize_t show_rotate(struct device *device, 3199 struct device_attribute *attr,char *buf) 3200 { 3201 struct fb_info *info; 3202 int rotate = 0, idx; 3203 3204 console_lock(); 3205 idx = con2fb_map[fg_console]; 3206 3207 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3208 goto err; 3209 3210 info = fbcon_registered_fb[idx]; 3211 rotate = fbcon_get_rotate(info); 3212 err: 3213 console_unlock(); 3214 return sysfs_emit(buf, "%d\n", rotate); 3215 } 3216 3217 static ssize_t show_cursor_blink(struct device *device, 3218 struct device_attribute *attr, char *buf) 3219 { 3220 struct fb_info *info; 3221 struct fbcon_ops *ops; 3222 int idx, blink = -1; 3223 3224 console_lock(); 3225 idx = con2fb_map[fg_console]; 3226 3227 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3228 goto err; 3229 3230 info = fbcon_registered_fb[idx]; 3231 ops = info->fbcon_par; 3232 3233 if (!ops) 3234 goto err; 3235 3236 blink = delayed_work_pending(&ops->cursor_work); 3237 err: 3238 console_unlock(); 3239 return sysfs_emit(buf, "%d\n", blink); 3240 } 3241 3242 static ssize_t store_cursor_blink(struct device *device, 3243 struct device_attribute *attr, 3244 const char *buf, size_t count) 3245 { 3246 struct fb_info *info; 3247 int blink, idx; 3248 char **last = NULL; 3249 3250 console_lock(); 3251 idx = con2fb_map[fg_console]; 3252 3253 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3254 goto err; 3255 3256 info = fbcon_registered_fb[idx]; 3257 3258 if (!info->fbcon_par) 3259 goto err; 3260 3261 blink = simple_strtoul(buf, last, 0); 3262 3263 if (blink) { 3264 fbcon_cursor_noblink = 0; 3265 fbcon_add_cursor_work(info); 3266 } else { 3267 fbcon_cursor_noblink = 1; 3268 fbcon_del_cursor_work(info); 3269 } 3270 3271 err: 3272 console_unlock(); 3273 return count; 3274 } 3275 3276 static struct device_attribute device_attrs[] = { 3277 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3278 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3279 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3280 store_cursor_blink), 3281 }; 3282 3283 static int fbcon_init_device(void) 3284 { 3285 int i, error = 0; 3286 3287 fbcon_has_sysfs = 1; 3288 3289 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3290 error = device_create_file(fbcon_device, &device_attrs[i]); 3291 3292 if (error) 3293 break; 3294 } 3295 3296 if (error) { 3297 while (--i >= 0) 3298 device_remove_file(fbcon_device, &device_attrs[i]); 3299 3300 fbcon_has_sysfs = 0; 3301 } 3302 3303 return 0; 3304 } 3305 3306 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3307 static void fbcon_register_existing_fbs(struct work_struct *work) 3308 { 3309 int i; 3310 3311 console_lock(); 3312 3313 deferred_takeover = false; 3314 logo_shown = FBCON_LOGO_DONTSHOW; 3315 3316 fbcon_for_each_registered_fb(i) 3317 do_fb_registered(fbcon_registered_fb[i]); 3318 3319 console_unlock(); 3320 } 3321 3322 static struct notifier_block fbcon_output_nb; 3323 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3324 3325 static int fbcon_output_notifier(struct notifier_block *nb, 3326 unsigned long action, void *data) 3327 { 3328 WARN_CONSOLE_UNLOCKED(); 3329 3330 pr_info("fbcon: Taking over console\n"); 3331 3332 dummycon_unregister_output_notifier(&fbcon_output_nb); 3333 3334 /* We may get called in atomic context */ 3335 schedule_work(&fbcon_deferred_takeover_work); 3336 3337 return NOTIFY_OK; 3338 } 3339 #endif 3340 3341 static void fbcon_start(void) 3342 { 3343 WARN_CONSOLE_UNLOCKED(); 3344 3345 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3346 if (conswitchp != &dummy_con) 3347 deferred_takeover = false; 3348 3349 if (deferred_takeover) { 3350 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3351 dummycon_register_output_notifier(&fbcon_output_nb); 3352 return; 3353 } 3354 #endif 3355 } 3356 3357 void __init fb_console_init(void) 3358 { 3359 int i; 3360 3361 console_lock(); 3362 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3363 "fbcon"); 3364 3365 if (IS_ERR(fbcon_device)) { 3366 printk(KERN_WARNING "Unable to create device " 3367 "for fbcon; errno = %ld\n", 3368 PTR_ERR(fbcon_device)); 3369 fbcon_device = NULL; 3370 } else 3371 fbcon_init_device(); 3372 3373 for (i = 0; i < MAX_NR_CONSOLES; i++) 3374 con2fb_map[i] = -1; 3375 3376 fbcon_start(); 3377 console_unlock(); 3378 } 3379 3380 #ifdef MODULE 3381 3382 static void __exit fbcon_deinit_device(void) 3383 { 3384 int i; 3385 3386 if (fbcon_has_sysfs) { 3387 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3388 device_remove_file(fbcon_device, &device_attrs[i]); 3389 3390 fbcon_has_sysfs = 0; 3391 } 3392 } 3393 3394 void __exit fb_console_exit(void) 3395 { 3396 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3397 console_lock(); 3398 if (deferred_takeover) 3399 dummycon_unregister_output_notifier(&fbcon_output_nb); 3400 console_unlock(); 3401 3402 cancel_work_sync(&fbcon_deferred_takeover_work); 3403 #endif 3404 3405 console_lock(); 3406 fbcon_deinit_device(); 3407 device_destroy(fb_class, MKDEV(0, 0)); 3408 3409 do_unregister_con_driver(&fb_con); 3410 console_unlock(); 3411 } 3412 #endif 3413