1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/slab.h> 68 #include <linux/fb.h> 69 #include <linux/fbcon.h> 70 #include <linux/vt_kern.h> 71 #include <linux/selection.h> 72 #include <linux/font.h> 73 #include <linux/smp.h> 74 #include <linux/init.h> 75 #include <linux/interrupt.h> 76 #include <linux/crc32.h> /* For counting font checksums */ 77 #include <linux/uaccess.h> 78 #include <asm/fb.h> 79 #include <asm/irq.h> 80 81 #include "fbcon.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 90 * means concurrent access to the same fbdev from both fbcon and userspace 91 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 92 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 93 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 94 * fbmem.c cannot use locking asserts, and there's lots of callers which get 95 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 96 */ 97 98 enum { 99 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 100 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 101 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 102 }; 103 104 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 105 106 struct fb_info *fbcon_registered_fb[FB_MAX]; 107 int fbcon_num_registered_fb; 108 109 #define fbcon_for_each_registered_fb(i) \ 110 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 111 if (!fbcon_registered_fb[i]) {} else 112 113 static signed char con2fb_map[MAX_NR_CONSOLES]; 114 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 115 116 static struct fb_info *fbcon_info_from_console(int console) 117 { 118 WARN_CONSOLE_UNLOCKED(); 119 120 return fbcon_registered_fb[con2fb_map[console]]; 121 } 122 123 static int logo_lines; 124 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 125 enums. */ 126 static int logo_shown = FBCON_LOGO_CANSHOW; 127 /* console mappings */ 128 static int first_fb_vc; 129 static int last_fb_vc = MAX_NR_CONSOLES - 1; 130 static int fbcon_is_default = 1; 131 static int primary_device = -1; 132 static int fbcon_has_console_bind; 133 134 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 135 static int map_override; 136 137 static inline void fbcon_map_override(void) 138 { 139 map_override = 1; 140 } 141 #else 142 static inline void fbcon_map_override(void) 143 { 144 } 145 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 146 147 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 148 static bool deferred_takeover = true; 149 #else 150 #define deferred_takeover false 151 #endif 152 153 /* font data */ 154 static char fontname[40]; 155 156 /* current fb_info */ 157 static int info_idx = -1; 158 159 /* console rotation */ 160 static int initial_rotation = -1; 161 static int fbcon_has_sysfs; 162 static int margin_color; 163 164 static const struct consw fb_con; 165 166 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 167 168 static int fbcon_cursor_noblink; 169 170 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 171 172 /* 173 * Interface used by the world 174 */ 175 176 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 177 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 178 179 /* 180 * Internal routines 181 */ 182 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 183 int unit); 184 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 185 int line, int count, int dy); 186 static void fbcon_modechanged(struct fb_info *info); 187 static void fbcon_set_all_vcs(struct fb_info *info); 188 189 static struct device *fbcon_device; 190 191 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 192 static inline void fbcon_set_rotation(struct fb_info *info) 193 { 194 struct fbcon_ops *ops = info->fbcon_par; 195 196 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 197 ops->p->con_rotate < 4) 198 ops->rotate = ops->p->con_rotate; 199 else 200 ops->rotate = 0; 201 } 202 203 static void fbcon_rotate(struct fb_info *info, u32 rotate) 204 { 205 struct fbcon_ops *ops= info->fbcon_par; 206 struct fb_info *fb_info; 207 208 if (!ops || ops->currcon == -1) 209 return; 210 211 fb_info = fbcon_info_from_console(ops->currcon); 212 213 if (info == fb_info) { 214 struct fbcon_display *p = &fb_display[ops->currcon]; 215 216 if (rotate < 4) 217 p->con_rotate = rotate; 218 else 219 p->con_rotate = 0; 220 221 fbcon_modechanged(info); 222 } 223 } 224 225 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 226 { 227 struct fbcon_ops *ops = info->fbcon_par; 228 struct vc_data *vc; 229 struct fbcon_display *p; 230 int i; 231 232 if (!ops || ops->currcon < 0 || rotate > 3) 233 return; 234 235 for (i = first_fb_vc; i <= last_fb_vc; i++) { 236 vc = vc_cons[i].d; 237 if (!vc || vc->vc_mode != KD_TEXT || 238 fbcon_info_from_console(i) != info) 239 continue; 240 241 p = &fb_display[vc->vc_num]; 242 p->con_rotate = rotate; 243 } 244 245 fbcon_set_all_vcs(info); 246 } 247 #else 248 static inline void fbcon_set_rotation(struct fb_info *info) 249 { 250 struct fbcon_ops *ops = info->fbcon_par; 251 252 ops->rotate = FB_ROTATE_UR; 253 } 254 255 static void fbcon_rotate(struct fb_info *info, u32 rotate) 256 { 257 return; 258 } 259 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 261 { 262 return; 263 } 264 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 265 266 static int fbcon_get_rotate(struct fb_info *info) 267 { 268 struct fbcon_ops *ops = info->fbcon_par; 269 270 return (ops) ? ops->rotate : 0; 271 } 272 273 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 274 { 275 struct fbcon_ops *ops = info->fbcon_par; 276 277 return (info->state != FBINFO_STATE_RUNNING || 278 vc->vc_mode != KD_TEXT || ops->graphics); 279 } 280 281 static int get_color(struct vc_data *vc, struct fb_info *info, 282 u16 c, int is_fg) 283 { 284 int depth = fb_get_color_depth(&info->var, &info->fix); 285 int color = 0; 286 287 if (console_blanked) { 288 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 289 290 c = vc->vc_video_erase_char & charmask; 291 } 292 293 if (depth != 1) 294 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 295 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 296 297 switch (depth) { 298 case 1: 299 { 300 int col = mono_col(info); 301 /* 0 or 1 */ 302 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 303 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 304 305 if (console_blanked) 306 fg = bg; 307 308 color = (is_fg) ? fg : bg; 309 break; 310 } 311 case 2: 312 /* 313 * Scale down 16-colors to 4 colors. Default 4-color palette 314 * is grayscale. However, simply dividing the values by 4 315 * will not work, as colors 1, 2 and 3 will be scaled-down 316 * to zero rendering them invisible. So empirically convert 317 * colors to a sane 4-level grayscale. 318 */ 319 switch (color) { 320 case 0: 321 color = 0; /* black */ 322 break; 323 case 1 ... 6: 324 color = 2; /* white */ 325 break; 326 case 7 ... 8: 327 color = 1; /* gray */ 328 break; 329 default: 330 color = 3; /* intense white */ 331 break; 332 } 333 break; 334 case 3: 335 /* 336 * Last 8 entries of default 16-color palette is a more intense 337 * version of the first 8 (i.e., same chrominance, different 338 * luminance). 339 */ 340 color &= 7; 341 break; 342 } 343 344 345 return color; 346 } 347 348 static void fb_flashcursor(struct work_struct *work) 349 { 350 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 351 struct fb_info *info; 352 struct vc_data *vc = NULL; 353 int c; 354 int mode; 355 int ret; 356 357 /* FIXME: we should sort out the unbind locking instead */ 358 /* instead we just fail to flash the cursor if we can't get 359 * the lock instead of blocking fbcon deinit */ 360 ret = console_trylock(); 361 if (ret == 0) 362 return; 363 364 /* protected by console_lock */ 365 info = ops->info; 366 367 if (ops->currcon != -1) 368 vc = vc_cons[ops->currcon].d; 369 370 if (!vc || !con_is_visible(vc) || 371 fbcon_info_from_console(vc->vc_num) != info || 372 vc->vc_deccm != 1) { 373 console_unlock(); 374 return; 375 } 376 377 c = scr_readw((u16 *) vc->vc_pos); 378 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 379 CM_ERASE : CM_DRAW; 380 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 381 get_color(vc, info, c, 0)); 382 console_unlock(); 383 384 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 385 ops->cur_blink_jiffies); 386 } 387 388 static void fbcon_add_cursor_work(struct fb_info *info) 389 { 390 struct fbcon_ops *ops = info->fbcon_par; 391 392 if (!fbcon_cursor_noblink) 393 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 394 ops->cur_blink_jiffies); 395 } 396 397 static void fbcon_del_cursor_work(struct fb_info *info) 398 { 399 struct fbcon_ops *ops = info->fbcon_par; 400 401 cancel_delayed_work_sync(&ops->cursor_work); 402 } 403 404 #ifndef MODULE 405 static int __init fb_console_setup(char *this_opt) 406 { 407 char *options; 408 int i, j; 409 410 if (!this_opt || !*this_opt) 411 return 1; 412 413 while ((options = strsep(&this_opt, ",")) != NULL) { 414 if (!strncmp(options, "font:", 5)) { 415 strlcpy(fontname, options + 5, sizeof(fontname)); 416 continue; 417 } 418 419 if (!strncmp(options, "scrollback:", 11)) { 420 pr_warn("Ignoring scrollback size option\n"); 421 continue; 422 } 423 424 if (!strncmp(options, "map:", 4)) { 425 options += 4; 426 if (*options) { 427 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 428 if (!options[j]) 429 j = 0; 430 con2fb_map_boot[i] = 431 (options[j++]-'0') % FB_MAX; 432 } 433 434 fbcon_map_override(); 435 } 436 continue; 437 } 438 439 if (!strncmp(options, "vc:", 3)) { 440 options += 3; 441 if (*options) 442 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 443 if (first_fb_vc < 0) 444 first_fb_vc = 0; 445 if (*options++ == '-') 446 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 447 fbcon_is_default = 0; 448 continue; 449 } 450 451 if (!strncmp(options, "rotate:", 7)) { 452 options += 7; 453 if (*options) 454 initial_rotation = simple_strtoul(options, &options, 0); 455 if (initial_rotation > 3) 456 initial_rotation = 0; 457 continue; 458 } 459 460 if (!strncmp(options, "margin:", 7)) { 461 options += 7; 462 if (*options) 463 margin_color = simple_strtoul(options, &options, 0); 464 continue; 465 } 466 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 467 if (!strcmp(options, "nodefer")) { 468 deferred_takeover = false; 469 continue; 470 } 471 #endif 472 473 if (!strncmp(options, "logo-pos:", 9)) { 474 options += 9; 475 if (!strcmp(options, "center")) 476 fb_center_logo = true; 477 continue; 478 } 479 480 if (!strncmp(options, "logo-count:", 11)) { 481 options += 11; 482 if (*options) 483 fb_logo_count = simple_strtol(options, &options, 0); 484 continue; 485 } 486 } 487 return 1; 488 } 489 490 __setup("fbcon=", fb_console_setup); 491 #endif 492 493 static int search_fb_in_map(int idx) 494 { 495 int i, retval = 0; 496 497 for (i = first_fb_vc; i <= last_fb_vc; i++) { 498 if (con2fb_map[i] == idx) 499 retval = 1; 500 } 501 return retval; 502 } 503 504 static int search_for_mapped_con(void) 505 { 506 int i, retval = 0; 507 508 for (i = first_fb_vc; i <= last_fb_vc; i++) { 509 if (con2fb_map[i] != -1) 510 retval = 1; 511 } 512 return retval; 513 } 514 515 static int do_fbcon_takeover(int show_logo) 516 { 517 int err, i; 518 519 if (!fbcon_num_registered_fb) 520 return -ENODEV; 521 522 if (!show_logo) 523 logo_shown = FBCON_LOGO_DONTSHOW; 524 525 for (i = first_fb_vc; i <= last_fb_vc; i++) 526 con2fb_map[i] = info_idx; 527 528 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 529 fbcon_is_default); 530 531 if (err) { 532 for (i = first_fb_vc; i <= last_fb_vc; i++) 533 con2fb_map[i] = -1; 534 info_idx = -1; 535 } else { 536 fbcon_has_console_bind = 1; 537 } 538 539 return err; 540 } 541 542 #ifdef MODULE 543 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 544 int cols, int rows, int new_cols, int new_rows) 545 { 546 logo_shown = FBCON_LOGO_DONTSHOW; 547 } 548 #else 549 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 550 int cols, int rows, int new_cols, int new_rows) 551 { 552 /* Need to make room for the logo */ 553 struct fbcon_ops *ops = info->fbcon_par; 554 int cnt, erase = vc->vc_video_erase_char, step; 555 unsigned short *save = NULL, *r, *q; 556 int logo_height; 557 558 if (info->fbops->owner) { 559 logo_shown = FBCON_LOGO_DONTSHOW; 560 return; 561 } 562 563 /* 564 * remove underline attribute from erase character 565 * if black and white framebuffer. 566 */ 567 if (fb_get_color_depth(&info->var, &info->fix) == 1) 568 erase &= ~0x400; 569 logo_height = fb_prepare_logo(info, ops->rotate); 570 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 571 q = (unsigned short *) (vc->vc_origin + 572 vc->vc_size_row * rows); 573 step = logo_lines * cols; 574 for (r = q - logo_lines * cols; r < q; r++) 575 if (scr_readw(r) != vc->vc_video_erase_char) 576 break; 577 if (r != q && new_rows >= rows + logo_lines) { 578 save = kmalloc(array3_size(logo_lines, new_cols, 2), 579 GFP_KERNEL); 580 if (save) { 581 int i = min(cols, new_cols); 582 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 583 r = q - step; 584 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 585 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 586 r = q; 587 } 588 } 589 if (r == q) { 590 /* We can scroll screen down */ 591 r = q - step - cols; 592 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 593 scr_memcpyw(r + step, r, vc->vc_size_row); 594 r -= cols; 595 } 596 if (!save) { 597 int lines; 598 if (vc->state.y + logo_lines >= rows) 599 lines = rows - vc->state.y - 1; 600 else 601 lines = logo_lines; 602 vc->state.y += lines; 603 vc->vc_pos += lines * vc->vc_size_row; 604 } 605 } 606 scr_memsetw((unsigned short *) vc->vc_origin, 607 erase, 608 vc->vc_size_row * logo_lines); 609 610 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 611 fbcon_clear_margins(vc, 0); 612 update_screen(vc); 613 } 614 615 if (save) { 616 q = (unsigned short *) (vc->vc_origin + 617 vc->vc_size_row * 618 rows); 619 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 620 vc->state.y += logo_lines; 621 vc->vc_pos += logo_lines * vc->vc_size_row; 622 kfree(save); 623 } 624 625 if (logo_shown == FBCON_LOGO_DONTSHOW) 626 return; 627 628 if (logo_lines > vc->vc_bottom) { 629 logo_shown = FBCON_LOGO_CANSHOW; 630 printk(KERN_INFO 631 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 632 } else { 633 logo_shown = FBCON_LOGO_DRAW; 634 vc->vc_top = logo_lines; 635 } 636 } 637 #endif /* MODULE */ 638 639 #ifdef CONFIG_FB_TILEBLITTING 640 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 641 { 642 struct fbcon_ops *ops = info->fbcon_par; 643 644 ops->p = &fb_display[vc->vc_num]; 645 646 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 647 fbcon_set_tileops(vc, info); 648 else { 649 fbcon_set_rotation(info); 650 fbcon_set_bitops(ops); 651 } 652 } 653 654 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 655 { 656 int err = 0; 657 658 if (info->flags & FBINFO_MISC_TILEBLITTING && 659 info->tileops->fb_get_tilemax(info) < charcount) 660 err = 1; 661 662 return err; 663 } 664 #else 665 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 666 { 667 struct fbcon_ops *ops = info->fbcon_par; 668 669 info->flags &= ~FBINFO_MISC_TILEBLITTING; 670 ops->p = &fb_display[vc->vc_num]; 671 fbcon_set_rotation(info); 672 fbcon_set_bitops(ops); 673 } 674 675 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 676 { 677 return 0; 678 } 679 680 #endif /* CONFIG_MISC_TILEBLITTING */ 681 682 static void fbcon_release(struct fb_info *info) 683 { 684 lock_fb_info(info); 685 if (info->fbops->fb_release) 686 info->fbops->fb_release(info, 0); 687 unlock_fb_info(info); 688 689 module_put(info->fbops->owner); 690 691 if (info->fbcon_par) { 692 struct fbcon_ops *ops = info->fbcon_par; 693 694 fbcon_del_cursor_work(info); 695 kfree(ops->cursor_state.mask); 696 kfree(ops->cursor_data); 697 kfree(ops->cursor_src); 698 kfree(ops->fontbuffer); 699 kfree(info->fbcon_par); 700 info->fbcon_par = NULL; 701 } 702 } 703 704 static int fbcon_open(struct fb_info *info) 705 { 706 struct fbcon_ops *ops; 707 708 if (!try_module_get(info->fbops->owner)) 709 return -ENODEV; 710 711 lock_fb_info(info); 712 if (info->fbops->fb_open && 713 info->fbops->fb_open(info, 0)) { 714 unlock_fb_info(info); 715 module_put(info->fbops->owner); 716 return -ENODEV; 717 } 718 unlock_fb_info(info); 719 720 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 721 if (!ops) { 722 fbcon_release(info); 723 return -ENOMEM; 724 } 725 726 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 727 ops->info = info; 728 info->fbcon_par = ops; 729 ops->cur_blink_jiffies = HZ / 5; 730 731 return 0; 732 } 733 734 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 735 int unit) 736 { 737 int err; 738 739 err = fbcon_open(info); 740 if (err) 741 return err; 742 743 if (vc) 744 set_blitting_type(vc, info); 745 746 return err; 747 } 748 749 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 750 struct fb_info *newinfo) 751 { 752 int ret; 753 754 fbcon_release(oldinfo); 755 756 /* 757 If oldinfo and newinfo are driving the same hardware, 758 the fb_release() method of oldinfo may attempt to 759 restore the hardware state. This will leave the 760 newinfo in an undefined state. Thus, a call to 761 fb_set_par() may be needed for the newinfo. 762 */ 763 if (newinfo && newinfo->fbops->fb_set_par) { 764 ret = newinfo->fbops->fb_set_par(newinfo); 765 766 if (ret) 767 printk(KERN_ERR "con2fb_release_oldinfo: " 768 "detected unhandled fb_set_par error, " 769 "error code %d\n", ret); 770 } 771 } 772 773 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 774 int unit, int show_logo) 775 { 776 struct fbcon_ops *ops = info->fbcon_par; 777 int ret; 778 779 ops->currcon = fg_console; 780 781 if (info->fbops->fb_set_par && !ops->initialized) { 782 ret = info->fbops->fb_set_par(info); 783 784 if (ret) 785 printk(KERN_ERR "con2fb_init_display: detected " 786 "unhandled fb_set_par error, " 787 "error code %d\n", ret); 788 } 789 790 ops->initialized = true; 791 ops->graphics = 0; 792 fbcon_set_disp(info, &info->var, unit); 793 794 if (show_logo) { 795 struct vc_data *fg_vc = vc_cons[fg_console].d; 796 struct fb_info *fg_info = 797 fbcon_info_from_console(fg_console); 798 799 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 800 fg_vc->vc_rows, fg_vc->vc_cols, 801 fg_vc->vc_rows); 802 } 803 804 update_screen(vc_cons[fg_console].d); 805 } 806 807 /** 808 * set_con2fb_map - map console to frame buffer device 809 * @unit: virtual console number to map 810 * @newidx: frame buffer index to map virtual console to 811 * @user: user request 812 * 813 * Maps a virtual console @unit to a frame buffer device 814 * @newidx. 815 * 816 * This should be called with the console lock held. 817 */ 818 static int set_con2fb_map(int unit, int newidx, int user) 819 { 820 struct vc_data *vc = vc_cons[unit].d; 821 int oldidx = con2fb_map[unit]; 822 struct fb_info *info = fbcon_registered_fb[newidx]; 823 struct fb_info *oldinfo = NULL; 824 int found, err = 0, show_logo; 825 826 WARN_CONSOLE_UNLOCKED(); 827 828 if (oldidx == newidx) 829 return 0; 830 831 if (!info) 832 return -EINVAL; 833 834 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 835 info_idx = newidx; 836 return do_fbcon_takeover(0); 837 } 838 839 if (oldidx != -1) 840 oldinfo = fbcon_registered_fb[oldidx]; 841 842 found = search_fb_in_map(newidx); 843 844 if (!err && !found) { 845 err = con2fb_acquire_newinfo(vc, info, unit); 846 if (!err) 847 con2fb_map[unit] = newidx; 848 } 849 850 /* 851 * If old fb is not mapped to any of the consoles, 852 * fbcon should release it. 853 */ 854 if (!err && oldinfo && !search_fb_in_map(oldidx)) 855 con2fb_release_oldinfo(vc, oldinfo, info); 856 857 show_logo = (fg_console == 0 && !user && 858 logo_shown != FBCON_LOGO_DONTSHOW); 859 860 if (!found) 861 fbcon_add_cursor_work(info); 862 con2fb_map_boot[unit] = newidx; 863 con2fb_init_display(vc, info, unit, show_logo); 864 865 if (!search_fb_in_map(info_idx)) 866 info_idx = newidx; 867 868 return err; 869 } 870 871 /* 872 * Low Level Operations 873 */ 874 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 875 static int var_to_display(struct fbcon_display *disp, 876 struct fb_var_screeninfo *var, 877 struct fb_info *info) 878 { 879 disp->xres_virtual = var->xres_virtual; 880 disp->yres_virtual = var->yres_virtual; 881 disp->bits_per_pixel = var->bits_per_pixel; 882 disp->grayscale = var->grayscale; 883 disp->nonstd = var->nonstd; 884 disp->accel_flags = var->accel_flags; 885 disp->height = var->height; 886 disp->width = var->width; 887 disp->red = var->red; 888 disp->green = var->green; 889 disp->blue = var->blue; 890 disp->transp = var->transp; 891 disp->rotate = var->rotate; 892 disp->mode = fb_match_mode(var, &info->modelist); 893 if (disp->mode == NULL) 894 /* This should not happen */ 895 return -EINVAL; 896 return 0; 897 } 898 899 static void display_to_var(struct fb_var_screeninfo *var, 900 struct fbcon_display *disp) 901 { 902 fb_videomode_to_var(var, disp->mode); 903 var->xres_virtual = disp->xres_virtual; 904 var->yres_virtual = disp->yres_virtual; 905 var->bits_per_pixel = disp->bits_per_pixel; 906 var->grayscale = disp->grayscale; 907 var->nonstd = disp->nonstd; 908 var->accel_flags = disp->accel_flags; 909 var->height = disp->height; 910 var->width = disp->width; 911 var->red = disp->red; 912 var->green = disp->green; 913 var->blue = disp->blue; 914 var->transp = disp->transp; 915 var->rotate = disp->rotate; 916 } 917 918 static const char *fbcon_startup(void) 919 { 920 const char *display_desc = "frame buffer device"; 921 struct fbcon_display *p = &fb_display[fg_console]; 922 struct vc_data *vc = vc_cons[fg_console].d; 923 const struct font_desc *font = NULL; 924 struct fb_info *info = NULL; 925 struct fbcon_ops *ops; 926 int rows, cols; 927 928 /* 929 * If num_registered_fb is zero, this is a call for the dummy part. 930 * The frame buffer devices weren't initialized yet. 931 */ 932 if (!fbcon_num_registered_fb || info_idx == -1) 933 return display_desc; 934 /* 935 * Instead of blindly using registered_fb[0], we use info_idx, set by 936 * fbcon_fb_registered(); 937 */ 938 info = fbcon_registered_fb[info_idx]; 939 if (!info) 940 return NULL; 941 942 if (fbcon_open(info)) 943 return NULL; 944 945 ops = info->fbcon_par; 946 ops->currcon = -1; 947 ops->graphics = 1; 948 ops->cur_rotate = -1; 949 950 p->con_rotate = initial_rotation; 951 if (p->con_rotate == -1) 952 p->con_rotate = info->fbcon_rotate_hint; 953 if (p->con_rotate == -1) 954 p->con_rotate = FB_ROTATE_UR; 955 956 set_blitting_type(vc, info); 957 958 /* Setup default font */ 959 if (!p->fontdata && !vc->vc_font.data) { 960 if (!fontname[0] || !(font = find_font(fontname))) 961 font = get_default_font(info->var.xres, 962 info->var.yres, 963 info->pixmap.blit_x, 964 info->pixmap.blit_y); 965 vc->vc_font.width = font->width; 966 vc->vc_font.height = font->height; 967 vc->vc_font.data = (void *)(p->fontdata = font->data); 968 vc->vc_font.charcount = font->charcount; 969 } else { 970 p->fontdata = vc->vc_font.data; 971 } 972 973 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 974 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 975 cols /= vc->vc_font.width; 976 rows /= vc->vc_font.height; 977 vc_resize(vc, cols, rows); 978 979 pr_debug("mode: %s\n", info->fix.id); 980 pr_debug("visual: %d\n", info->fix.visual); 981 pr_debug("res: %dx%d-%d\n", info->var.xres, 982 info->var.yres, 983 info->var.bits_per_pixel); 984 985 fbcon_add_cursor_work(info); 986 return display_desc; 987 } 988 989 static void fbcon_init(struct vc_data *vc, int init) 990 { 991 struct fb_info *info; 992 struct fbcon_ops *ops; 993 struct vc_data **default_mode = vc->vc_display_fg; 994 struct vc_data *svc = *default_mode; 995 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 996 int logo = 1, new_rows, new_cols, rows, cols; 997 int ret; 998 999 if (WARN_ON(info_idx == -1)) 1000 return; 1001 1002 if (con2fb_map[vc->vc_num] == -1) 1003 con2fb_map[vc->vc_num] = info_idx; 1004 1005 info = fbcon_info_from_console(vc->vc_num); 1006 1007 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1008 logo_shown = FBCON_LOGO_DONTSHOW; 1009 1010 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1011 (info->fix.type == FB_TYPE_TEXT)) 1012 logo = 0; 1013 1014 if (var_to_display(p, &info->var, info)) 1015 return; 1016 1017 if (!info->fbcon_par) 1018 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1019 1020 /* If we are not the first console on this 1021 fb, copy the font from that console */ 1022 t = &fb_display[fg_console]; 1023 if (!p->fontdata) { 1024 if (t->fontdata) { 1025 struct vc_data *fvc = vc_cons[fg_console].d; 1026 1027 vc->vc_font.data = (void *)(p->fontdata = 1028 fvc->vc_font.data); 1029 vc->vc_font.width = fvc->vc_font.width; 1030 vc->vc_font.height = fvc->vc_font.height; 1031 vc->vc_font.charcount = fvc->vc_font.charcount; 1032 p->userfont = t->userfont; 1033 1034 if (p->userfont) 1035 REFCOUNT(p->fontdata)++; 1036 } else { 1037 const struct font_desc *font = NULL; 1038 1039 if (!fontname[0] || !(font = find_font(fontname))) 1040 font = get_default_font(info->var.xres, 1041 info->var.yres, 1042 info->pixmap.blit_x, 1043 info->pixmap.blit_y); 1044 vc->vc_font.width = font->width; 1045 vc->vc_font.height = font->height; 1046 vc->vc_font.data = (void *)(p->fontdata = font->data); 1047 vc->vc_font.charcount = font->charcount; 1048 } 1049 } 1050 1051 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1052 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1053 if (vc->vc_font.charcount == 256) { 1054 vc->vc_hi_font_mask = 0; 1055 } else { 1056 vc->vc_hi_font_mask = 0x100; 1057 if (vc->vc_can_do_color) 1058 vc->vc_complement_mask <<= 1; 1059 } 1060 1061 if (!*svc->vc_uni_pagedir_loc) 1062 con_set_default_unimap(svc); 1063 if (!*vc->vc_uni_pagedir_loc) 1064 con_copy_unimap(vc, svc); 1065 1066 ops = info->fbcon_par; 1067 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1068 1069 p->con_rotate = initial_rotation; 1070 if (p->con_rotate == -1) 1071 p->con_rotate = info->fbcon_rotate_hint; 1072 if (p->con_rotate == -1) 1073 p->con_rotate = FB_ROTATE_UR; 1074 1075 set_blitting_type(vc, info); 1076 1077 cols = vc->vc_cols; 1078 rows = vc->vc_rows; 1079 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1080 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1081 new_cols /= vc->vc_font.width; 1082 new_rows /= vc->vc_font.height; 1083 1084 /* 1085 * We must always set the mode. The mode of the previous console 1086 * driver could be in the same resolution but we are using different 1087 * hardware so we have to initialize the hardware. 1088 * 1089 * We need to do it in fbcon_init() to prevent screen corruption. 1090 */ 1091 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1092 if (info->fbops->fb_set_par && !ops->initialized) { 1093 ret = info->fbops->fb_set_par(info); 1094 1095 if (ret) 1096 printk(KERN_ERR "fbcon_init: detected " 1097 "unhandled fb_set_par error, " 1098 "error code %d\n", ret); 1099 } 1100 1101 ops->initialized = true; 1102 } 1103 1104 ops->graphics = 0; 1105 1106 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1107 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1108 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1109 p->scrollmode = SCROLL_MOVE; 1110 else /* default to something safe */ 1111 p->scrollmode = SCROLL_REDRAW; 1112 #endif 1113 1114 /* 1115 * ++guenther: console.c:vc_allocate() relies on initializing 1116 * vc_{cols,rows}, but we must not set those if we are only 1117 * resizing the console. 1118 */ 1119 if (init) { 1120 vc->vc_cols = new_cols; 1121 vc->vc_rows = new_rows; 1122 } else 1123 vc_resize(vc, new_cols, new_rows); 1124 1125 if (logo) 1126 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1127 1128 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1129 ops->rotate = FB_ROTATE_UR; 1130 set_blitting_type(vc, info); 1131 } 1132 1133 ops->p = &fb_display[fg_console]; 1134 } 1135 1136 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1137 { 1138 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1139 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1140 p->fontdata = NULL; 1141 p->userfont = 0; 1142 } 1143 1144 static void set_vc_hi_font(struct vc_data *vc, bool set); 1145 1146 static void fbcon_release_all(void) 1147 { 1148 struct fb_info *info; 1149 int i, j, mapped; 1150 1151 fbcon_for_each_registered_fb(i) { 1152 mapped = 0; 1153 info = fbcon_registered_fb[i]; 1154 1155 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1156 if (con2fb_map[j] == i) { 1157 mapped = 1; 1158 con2fb_map[j] = -1; 1159 } 1160 } 1161 1162 if (mapped) 1163 fbcon_release(info); 1164 } 1165 } 1166 1167 static void fbcon_deinit(struct vc_data *vc) 1168 { 1169 struct fbcon_display *p = &fb_display[vc->vc_num]; 1170 struct fb_info *info; 1171 struct fbcon_ops *ops; 1172 int idx; 1173 bool free_font = true; 1174 1175 idx = con2fb_map[vc->vc_num]; 1176 1177 if (idx == -1) 1178 goto finished; 1179 1180 info = fbcon_registered_fb[idx]; 1181 1182 if (!info) 1183 goto finished; 1184 1185 if (info->flags & FBINFO_MISC_FIRMWARE) 1186 free_font = false; 1187 ops = info->fbcon_par; 1188 1189 if (!ops) 1190 goto finished; 1191 1192 if (con_is_visible(vc)) 1193 fbcon_del_cursor_work(info); 1194 1195 ops->initialized = false; 1196 finished: 1197 1198 fbcon_free_font(p, free_font); 1199 if (free_font) 1200 vc->vc_font.data = NULL; 1201 1202 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1203 set_vc_hi_font(vc, false); 1204 1205 if (!con_is_bound(&fb_con)) 1206 fbcon_release_all(); 1207 1208 if (vc->vc_num == logo_shown) 1209 logo_shown = FBCON_LOGO_CANSHOW; 1210 1211 return; 1212 } 1213 1214 /* ====================================================================== */ 1215 1216 /* fbcon_XXX routines - interface used by the world 1217 * 1218 * This system is now divided into two levels because of complications 1219 * caused by hardware scrolling. Top level functions: 1220 * 1221 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1222 * 1223 * handles y values in range [0, scr_height-1] that correspond to real 1224 * screen positions. y_wrap shift means that first line of bitmap may be 1225 * anywhere on this display. These functions convert lineoffsets to 1226 * bitmap offsets and deal with the wrap-around case by splitting blits. 1227 * 1228 * fbcon_bmove_physical_8() -- These functions fast implementations 1229 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1230 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1231 * 1232 * WARNING: 1233 * 1234 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1235 * Implies should only really hardware scroll in rows. Only reason for 1236 * restriction is simplicity & efficiency at the moment. 1237 */ 1238 1239 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1240 int width) 1241 { 1242 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1243 struct fbcon_ops *ops = info->fbcon_par; 1244 1245 struct fbcon_display *p = &fb_display[vc->vc_num]; 1246 u_int y_break; 1247 1248 if (fbcon_is_inactive(vc, info)) 1249 return; 1250 1251 if (!height || !width) 1252 return; 1253 1254 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1255 vc->vc_top = 0; 1256 /* 1257 * If the font dimensions are not an integral of the display 1258 * dimensions then the ops->clear below won't end up clearing 1259 * the margins. Call clear_margins here in case the logo 1260 * bitmap stretched into the margin area. 1261 */ 1262 fbcon_clear_margins(vc, 0); 1263 } 1264 1265 /* Split blits that cross physical y_wrap boundary */ 1266 1267 y_break = p->vrows - p->yscroll; 1268 if (sy < y_break && sy + height - 1 >= y_break) { 1269 u_int b = y_break - sy; 1270 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1271 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1272 width); 1273 } else 1274 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1275 } 1276 1277 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1278 int count, int ypos, int xpos) 1279 { 1280 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1281 struct fbcon_display *p = &fb_display[vc->vc_num]; 1282 struct fbcon_ops *ops = info->fbcon_par; 1283 1284 if (!fbcon_is_inactive(vc, info)) 1285 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1286 get_color(vc, info, scr_readw(s), 1), 1287 get_color(vc, info, scr_readw(s), 0)); 1288 } 1289 1290 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1291 { 1292 unsigned short chr; 1293 1294 scr_writew(c, &chr); 1295 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1296 } 1297 1298 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1299 { 1300 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1301 struct fbcon_ops *ops = info->fbcon_par; 1302 1303 if (!fbcon_is_inactive(vc, info)) 1304 ops->clear_margins(vc, info, margin_color, bottom_only); 1305 } 1306 1307 static void fbcon_cursor(struct vc_data *vc, int mode) 1308 { 1309 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1310 struct fbcon_ops *ops = info->fbcon_par; 1311 int c = scr_readw((u16 *) vc->vc_pos); 1312 1313 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1314 1315 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1316 return; 1317 1318 if (vc->vc_cursor_type & CUR_SW) 1319 fbcon_del_cursor_work(info); 1320 else 1321 fbcon_add_cursor_work(info); 1322 1323 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1324 1325 if (!ops->cursor) 1326 return; 1327 1328 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1329 get_color(vc, info, c, 0)); 1330 } 1331 1332 static int scrollback_phys_max = 0; 1333 static int scrollback_max = 0; 1334 static int scrollback_current = 0; 1335 1336 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1337 int unit) 1338 { 1339 struct fbcon_display *p, *t; 1340 struct vc_data **default_mode, *vc; 1341 struct vc_data *svc; 1342 struct fbcon_ops *ops = info->fbcon_par; 1343 int rows, cols; 1344 1345 p = &fb_display[unit]; 1346 1347 if (var_to_display(p, var, info)) 1348 return; 1349 1350 vc = vc_cons[unit].d; 1351 1352 if (!vc) 1353 return; 1354 1355 default_mode = vc->vc_display_fg; 1356 svc = *default_mode; 1357 t = &fb_display[svc->vc_num]; 1358 1359 if (!vc->vc_font.data) { 1360 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1361 vc->vc_font.width = (*default_mode)->vc_font.width; 1362 vc->vc_font.height = (*default_mode)->vc_font.height; 1363 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1364 p->userfont = t->userfont; 1365 if (p->userfont) 1366 REFCOUNT(p->fontdata)++; 1367 } 1368 1369 var->activate = FB_ACTIVATE_NOW; 1370 info->var.activate = var->activate; 1371 var->yoffset = info->var.yoffset; 1372 var->xoffset = info->var.xoffset; 1373 fb_set_var(info, var); 1374 ops->var = info->var; 1375 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1376 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1377 if (vc->vc_font.charcount == 256) { 1378 vc->vc_hi_font_mask = 0; 1379 } else { 1380 vc->vc_hi_font_mask = 0x100; 1381 if (vc->vc_can_do_color) 1382 vc->vc_complement_mask <<= 1; 1383 } 1384 1385 if (!*svc->vc_uni_pagedir_loc) 1386 con_set_default_unimap(svc); 1387 if (!*vc->vc_uni_pagedir_loc) 1388 con_copy_unimap(vc, svc); 1389 1390 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1391 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1392 cols /= vc->vc_font.width; 1393 rows /= vc->vc_font.height; 1394 vc_resize(vc, cols, rows); 1395 1396 if (con_is_visible(vc)) { 1397 update_screen(vc); 1398 } 1399 } 1400 1401 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1402 { 1403 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1404 struct fbcon_ops *ops = info->fbcon_par; 1405 struct fbcon_display *p = &fb_display[vc->vc_num]; 1406 1407 p->yscroll += count; 1408 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1409 p->yscroll -= p->vrows; 1410 ops->var.xoffset = 0; 1411 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1412 ops->var.vmode |= FB_VMODE_YWRAP; 1413 ops->update_start(info); 1414 scrollback_max += count; 1415 if (scrollback_max > scrollback_phys_max) 1416 scrollback_max = scrollback_phys_max; 1417 scrollback_current = 0; 1418 } 1419 1420 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1421 { 1422 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1423 struct fbcon_ops *ops = info->fbcon_par; 1424 struct fbcon_display *p = &fb_display[vc->vc_num]; 1425 1426 p->yscroll -= count; 1427 if (p->yscroll < 0) /* Deal with wrap */ 1428 p->yscroll += p->vrows; 1429 ops->var.xoffset = 0; 1430 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1431 ops->var.vmode |= FB_VMODE_YWRAP; 1432 ops->update_start(info); 1433 scrollback_max -= count; 1434 if (scrollback_max < 0) 1435 scrollback_max = 0; 1436 scrollback_current = 0; 1437 } 1438 1439 static __inline__ void ypan_up(struct vc_data *vc, int count) 1440 { 1441 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1442 struct fbcon_display *p = &fb_display[vc->vc_num]; 1443 struct fbcon_ops *ops = info->fbcon_par; 1444 1445 p->yscroll += count; 1446 if (p->yscroll > p->vrows - vc->vc_rows) { 1447 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1448 0, 0, 0, vc->vc_rows, vc->vc_cols); 1449 p->yscroll -= p->vrows - vc->vc_rows; 1450 } 1451 1452 ops->var.xoffset = 0; 1453 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1454 ops->var.vmode &= ~FB_VMODE_YWRAP; 1455 ops->update_start(info); 1456 fbcon_clear_margins(vc, 1); 1457 scrollback_max += count; 1458 if (scrollback_max > scrollback_phys_max) 1459 scrollback_max = scrollback_phys_max; 1460 scrollback_current = 0; 1461 } 1462 1463 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1464 { 1465 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1466 struct fbcon_ops *ops = info->fbcon_par; 1467 struct fbcon_display *p = &fb_display[vc->vc_num]; 1468 1469 p->yscroll += count; 1470 1471 if (p->yscroll > p->vrows - vc->vc_rows) { 1472 p->yscroll -= p->vrows - vc->vc_rows; 1473 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1474 } 1475 1476 ops->var.xoffset = 0; 1477 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1478 ops->var.vmode &= ~FB_VMODE_YWRAP; 1479 ops->update_start(info); 1480 fbcon_clear_margins(vc, 1); 1481 scrollback_max += count; 1482 if (scrollback_max > scrollback_phys_max) 1483 scrollback_max = scrollback_phys_max; 1484 scrollback_current = 0; 1485 } 1486 1487 static __inline__ void ypan_down(struct vc_data *vc, int count) 1488 { 1489 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1490 struct fbcon_display *p = &fb_display[vc->vc_num]; 1491 struct fbcon_ops *ops = info->fbcon_par; 1492 1493 p->yscroll -= count; 1494 if (p->yscroll < 0) { 1495 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1496 0, vc->vc_rows, vc->vc_cols); 1497 p->yscroll += p->vrows - vc->vc_rows; 1498 } 1499 1500 ops->var.xoffset = 0; 1501 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1502 ops->var.vmode &= ~FB_VMODE_YWRAP; 1503 ops->update_start(info); 1504 fbcon_clear_margins(vc, 1); 1505 scrollback_max -= count; 1506 if (scrollback_max < 0) 1507 scrollback_max = 0; 1508 scrollback_current = 0; 1509 } 1510 1511 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1512 { 1513 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1514 struct fbcon_ops *ops = info->fbcon_par; 1515 struct fbcon_display *p = &fb_display[vc->vc_num]; 1516 1517 p->yscroll -= count; 1518 1519 if (p->yscroll < 0) { 1520 p->yscroll += p->vrows - vc->vc_rows; 1521 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1522 } 1523 1524 ops->var.xoffset = 0; 1525 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1526 ops->var.vmode &= ~FB_VMODE_YWRAP; 1527 ops->update_start(info); 1528 fbcon_clear_margins(vc, 1); 1529 scrollback_max -= count; 1530 if (scrollback_max < 0) 1531 scrollback_max = 0; 1532 scrollback_current = 0; 1533 } 1534 1535 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1536 int line, int count, int dy) 1537 { 1538 unsigned short *s = (unsigned short *) 1539 (vc->vc_origin + vc->vc_size_row * line); 1540 1541 while (count--) { 1542 unsigned short *start = s; 1543 unsigned short *le = advance_row(s, 1); 1544 unsigned short c; 1545 int x = 0; 1546 unsigned short attr = 1; 1547 1548 do { 1549 c = scr_readw(s); 1550 if (attr != (c & 0xff00)) { 1551 attr = c & 0xff00; 1552 if (s > start) { 1553 fbcon_putcs(vc, start, s - start, 1554 dy, x); 1555 x += s - start; 1556 start = s; 1557 } 1558 } 1559 console_conditional_schedule(); 1560 s++; 1561 } while (s < le); 1562 if (s > start) 1563 fbcon_putcs(vc, start, s - start, dy, x); 1564 console_conditional_schedule(); 1565 dy++; 1566 } 1567 } 1568 1569 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1570 struct fbcon_display *p, int line, int count, int ycount) 1571 { 1572 int offset = ycount * vc->vc_cols; 1573 unsigned short *d = (unsigned short *) 1574 (vc->vc_origin + vc->vc_size_row * line); 1575 unsigned short *s = d + offset; 1576 struct fbcon_ops *ops = info->fbcon_par; 1577 1578 while (count--) { 1579 unsigned short *start = s; 1580 unsigned short *le = advance_row(s, 1); 1581 unsigned short c; 1582 int x = 0; 1583 1584 do { 1585 c = scr_readw(s); 1586 1587 if (c == scr_readw(d)) { 1588 if (s > start) { 1589 ops->bmove(vc, info, line + ycount, x, 1590 line, x, 1, s-start); 1591 x += s - start + 1; 1592 start = s + 1; 1593 } else { 1594 x++; 1595 start++; 1596 } 1597 } 1598 1599 scr_writew(c, d); 1600 console_conditional_schedule(); 1601 s++; 1602 d++; 1603 } while (s < le); 1604 if (s > start) 1605 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1606 s-start); 1607 console_conditional_schedule(); 1608 if (ycount > 0) 1609 line++; 1610 else { 1611 line--; 1612 /* NOTE: We subtract two lines from these pointers */ 1613 s -= vc->vc_size_row; 1614 d -= vc->vc_size_row; 1615 } 1616 } 1617 } 1618 1619 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1620 int line, int count, int offset) 1621 { 1622 unsigned short *d = (unsigned short *) 1623 (vc->vc_origin + vc->vc_size_row * line); 1624 unsigned short *s = d + offset; 1625 1626 while (count--) { 1627 unsigned short *start = s; 1628 unsigned short *le = advance_row(s, 1); 1629 unsigned short c; 1630 int x = 0; 1631 unsigned short attr = 1; 1632 1633 do { 1634 c = scr_readw(s); 1635 if (attr != (c & 0xff00)) { 1636 attr = c & 0xff00; 1637 if (s > start) { 1638 fbcon_putcs(vc, start, s - start, 1639 line, x); 1640 x += s - start; 1641 start = s; 1642 } 1643 } 1644 if (c == scr_readw(d)) { 1645 if (s > start) { 1646 fbcon_putcs(vc, start, s - start, 1647 line, x); 1648 x += s - start + 1; 1649 start = s + 1; 1650 } else { 1651 x++; 1652 start++; 1653 } 1654 } 1655 scr_writew(c, d); 1656 console_conditional_schedule(); 1657 s++; 1658 d++; 1659 } while (s < le); 1660 if (s > start) 1661 fbcon_putcs(vc, start, s - start, line, x); 1662 console_conditional_schedule(); 1663 if (offset > 0) 1664 line++; 1665 else { 1666 line--; 1667 /* NOTE: We subtract two lines from these pointers */ 1668 s -= vc->vc_size_row; 1669 d -= vc->vc_size_row; 1670 } 1671 } 1672 } 1673 1674 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1675 int dy, int dx, int height, int width, u_int y_break) 1676 { 1677 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1678 struct fbcon_ops *ops = info->fbcon_par; 1679 u_int b; 1680 1681 if (sy < y_break && sy + height > y_break) { 1682 b = y_break - sy; 1683 if (dy < sy) { /* Avoid trashing self */ 1684 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1685 y_break); 1686 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1687 height - b, width, y_break); 1688 } else { 1689 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1690 height - b, width, y_break); 1691 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1692 y_break); 1693 } 1694 return; 1695 } 1696 1697 if (dy < y_break && dy + height > y_break) { 1698 b = y_break - dy; 1699 if (dy < sy) { /* Avoid trashing self */ 1700 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1701 y_break); 1702 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1703 height - b, width, y_break); 1704 } else { 1705 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1706 height - b, width, y_break); 1707 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1708 y_break); 1709 } 1710 return; 1711 } 1712 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1713 height, width); 1714 } 1715 1716 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1717 int height, int width) 1718 { 1719 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1720 struct fbcon_display *p = &fb_display[vc->vc_num]; 1721 1722 if (fbcon_is_inactive(vc, info)) 1723 return; 1724 1725 if (!width || !height) 1726 return; 1727 1728 /* Split blits that cross physical y_wrap case. 1729 * Pathological case involves 4 blits, better to use recursive 1730 * code rather than unrolled case 1731 * 1732 * Recursive invocations don't need to erase the cursor over and 1733 * over again, so we use fbcon_bmove_rec() 1734 */ 1735 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1736 p->vrows - p->yscroll); 1737 } 1738 1739 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1740 enum con_scroll dir, unsigned int count) 1741 { 1742 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1743 struct fbcon_display *p = &fb_display[vc->vc_num]; 1744 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1745 1746 if (fbcon_is_inactive(vc, info)) 1747 return true; 1748 1749 fbcon_cursor(vc, CM_ERASE); 1750 1751 /* 1752 * ++Geert: Only use ywrap/ypan if the console is in text mode 1753 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1754 * whole screen (prevents flicker). 1755 */ 1756 1757 switch (dir) { 1758 case SM_UP: 1759 if (count > vc->vc_rows) /* Maximum realistic size */ 1760 count = vc->vc_rows; 1761 if (logo_shown >= 0) 1762 goto redraw_up; 1763 switch (fb_scrollmode(p)) { 1764 case SCROLL_MOVE: 1765 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1766 count); 1767 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1768 scr_memsetw((unsigned short *) (vc->vc_origin + 1769 vc->vc_size_row * 1770 (b - count)), 1771 vc->vc_video_erase_char, 1772 vc->vc_size_row * count); 1773 return true; 1774 1775 case SCROLL_WRAP_MOVE: 1776 if (b - t - count > 3 * vc->vc_rows >> 2) { 1777 if (t > 0) 1778 fbcon_bmove(vc, 0, 0, count, 0, t, 1779 vc->vc_cols); 1780 ywrap_up(vc, count); 1781 if (vc->vc_rows - b > 0) 1782 fbcon_bmove(vc, b - count, 0, b, 0, 1783 vc->vc_rows - b, 1784 vc->vc_cols); 1785 } else if (info->flags & FBINFO_READS_FAST) 1786 fbcon_bmove(vc, t + count, 0, t, 0, 1787 b - t - count, vc->vc_cols); 1788 else 1789 goto redraw_up; 1790 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1791 break; 1792 1793 case SCROLL_PAN_REDRAW: 1794 if ((p->yscroll + count <= 1795 2 * (p->vrows - vc->vc_rows)) 1796 && ((!scroll_partial && (b - t == vc->vc_rows)) 1797 || (scroll_partial 1798 && (b - t - count > 1799 3 * vc->vc_rows >> 2)))) { 1800 if (t > 0) 1801 fbcon_redraw_move(vc, p, 0, t, count); 1802 ypan_up_redraw(vc, t, count); 1803 if (vc->vc_rows - b > 0) 1804 fbcon_redraw_move(vc, p, b, 1805 vc->vc_rows - b, b); 1806 } else 1807 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1808 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1809 break; 1810 1811 case SCROLL_PAN_MOVE: 1812 if ((p->yscroll + count <= 1813 2 * (p->vrows - vc->vc_rows)) 1814 && ((!scroll_partial && (b - t == vc->vc_rows)) 1815 || (scroll_partial 1816 && (b - t - count > 1817 3 * vc->vc_rows >> 2)))) { 1818 if (t > 0) 1819 fbcon_bmove(vc, 0, 0, count, 0, t, 1820 vc->vc_cols); 1821 ypan_up(vc, count); 1822 if (vc->vc_rows - b > 0) 1823 fbcon_bmove(vc, b - count, 0, b, 0, 1824 vc->vc_rows - b, 1825 vc->vc_cols); 1826 } else if (info->flags & FBINFO_READS_FAST) 1827 fbcon_bmove(vc, t + count, 0, t, 0, 1828 b - t - count, vc->vc_cols); 1829 else 1830 goto redraw_up; 1831 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1832 break; 1833 1834 case SCROLL_REDRAW: 1835 redraw_up: 1836 fbcon_redraw(vc, p, t, b - t - count, 1837 count * vc->vc_cols); 1838 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1839 scr_memsetw((unsigned short *) (vc->vc_origin + 1840 vc->vc_size_row * 1841 (b - count)), 1842 vc->vc_video_erase_char, 1843 vc->vc_size_row * count); 1844 return true; 1845 } 1846 break; 1847 1848 case SM_DOWN: 1849 if (count > vc->vc_rows) /* Maximum realistic size */ 1850 count = vc->vc_rows; 1851 if (logo_shown >= 0) 1852 goto redraw_down; 1853 switch (fb_scrollmode(p)) { 1854 case SCROLL_MOVE: 1855 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1856 -count); 1857 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1858 scr_memsetw((unsigned short *) (vc->vc_origin + 1859 vc->vc_size_row * 1860 t), 1861 vc->vc_video_erase_char, 1862 vc->vc_size_row * count); 1863 return true; 1864 1865 case SCROLL_WRAP_MOVE: 1866 if (b - t - count > 3 * vc->vc_rows >> 2) { 1867 if (vc->vc_rows - b > 0) 1868 fbcon_bmove(vc, b, 0, b - count, 0, 1869 vc->vc_rows - b, 1870 vc->vc_cols); 1871 ywrap_down(vc, count); 1872 if (t > 0) 1873 fbcon_bmove(vc, count, 0, 0, 0, t, 1874 vc->vc_cols); 1875 } else if (info->flags & FBINFO_READS_FAST) 1876 fbcon_bmove(vc, t, 0, t + count, 0, 1877 b - t - count, vc->vc_cols); 1878 else 1879 goto redraw_down; 1880 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1881 break; 1882 1883 case SCROLL_PAN_MOVE: 1884 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1885 && ((!scroll_partial && (b - t == vc->vc_rows)) 1886 || (scroll_partial 1887 && (b - t - count > 1888 3 * vc->vc_rows >> 2)))) { 1889 if (vc->vc_rows - b > 0) 1890 fbcon_bmove(vc, b, 0, b - count, 0, 1891 vc->vc_rows - b, 1892 vc->vc_cols); 1893 ypan_down(vc, count); 1894 if (t > 0) 1895 fbcon_bmove(vc, count, 0, 0, 0, t, 1896 vc->vc_cols); 1897 } else if (info->flags & FBINFO_READS_FAST) 1898 fbcon_bmove(vc, t, 0, t + count, 0, 1899 b - t - count, vc->vc_cols); 1900 else 1901 goto redraw_down; 1902 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1903 break; 1904 1905 case SCROLL_PAN_REDRAW: 1906 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1907 && ((!scroll_partial && (b - t == vc->vc_rows)) 1908 || (scroll_partial 1909 && (b - t - count > 1910 3 * vc->vc_rows >> 2)))) { 1911 if (vc->vc_rows - b > 0) 1912 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1913 b - count); 1914 ypan_down_redraw(vc, t, count); 1915 if (t > 0) 1916 fbcon_redraw_move(vc, p, count, t, 0); 1917 } else 1918 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1919 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1920 break; 1921 1922 case SCROLL_REDRAW: 1923 redraw_down: 1924 fbcon_redraw(vc, p, b - 1, b - t - count, 1925 -count * vc->vc_cols); 1926 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1927 scr_memsetw((unsigned short *) (vc->vc_origin + 1928 vc->vc_size_row * 1929 t), 1930 vc->vc_video_erase_char, 1931 vc->vc_size_row * count); 1932 return true; 1933 } 1934 } 1935 return false; 1936 } 1937 1938 1939 static void updatescrollmode_accel(struct fbcon_display *p, 1940 struct fb_info *info, 1941 struct vc_data *vc) 1942 { 1943 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1944 struct fbcon_ops *ops = info->fbcon_par; 1945 int cap = info->flags; 1946 u16 t = 0; 1947 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1948 info->fix.xpanstep); 1949 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1950 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1951 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1952 info->var.xres_virtual); 1953 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1954 divides(ypan, vc->vc_font.height) && vyres > yres; 1955 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1956 divides(ywrap, vc->vc_font.height) && 1957 divides(vc->vc_font.height, vyres) && 1958 divides(vc->vc_font.height, yres); 1959 int reading_fast = cap & FBINFO_READS_FAST; 1960 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1961 !(cap & FBINFO_HWACCEL_DISABLED); 1962 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1963 !(cap & FBINFO_HWACCEL_DISABLED); 1964 1965 if (good_wrap || good_pan) { 1966 if (reading_fast || fast_copyarea) 1967 p->scrollmode = good_wrap ? 1968 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1969 else 1970 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1971 SCROLL_PAN_REDRAW; 1972 } else { 1973 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1974 p->scrollmode = SCROLL_MOVE; 1975 else 1976 p->scrollmode = SCROLL_REDRAW; 1977 } 1978 #endif 1979 } 1980 1981 static void updatescrollmode(struct fbcon_display *p, 1982 struct fb_info *info, 1983 struct vc_data *vc) 1984 { 1985 struct fbcon_ops *ops = info->fbcon_par; 1986 int fh = vc->vc_font.height; 1987 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1988 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1989 info->var.xres_virtual); 1990 1991 p->vrows = vyres/fh; 1992 if (yres > (fh * (vc->vc_rows + 1))) 1993 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1994 if ((yres % fh) && (vyres % fh < yres % fh)) 1995 p->vrows--; 1996 1997 /* update scrollmode in case hardware acceleration is used */ 1998 updatescrollmode_accel(p, info, vc); 1999 } 2000 2001 #define PITCH(w) (((w) + 7) >> 3) 2002 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 2003 2004 static int fbcon_resize(struct vc_data *vc, unsigned int width, 2005 unsigned int height, unsigned int user) 2006 { 2007 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2008 struct fbcon_ops *ops = info->fbcon_par; 2009 struct fbcon_display *p = &fb_display[vc->vc_num]; 2010 struct fb_var_screeninfo var = info->var; 2011 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2012 2013 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2014 int size; 2015 int pitch = PITCH(vc->vc_font.width); 2016 2017 /* 2018 * If user font, ensure that a possible change to user font 2019 * height or width will not allow a font data out-of-bounds access. 2020 * NOTE: must use original charcount in calculation as font 2021 * charcount can change and cannot be used to determine the 2022 * font data allocated size. 2023 */ 2024 if (pitch <= 0) 2025 return -EINVAL; 2026 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2027 if (size > FNTSIZE(vc->vc_font.data)) 2028 return -EINVAL; 2029 } 2030 2031 virt_w = FBCON_SWAP(ops->rotate, width, height); 2032 virt_h = FBCON_SWAP(ops->rotate, height, width); 2033 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2034 vc->vc_font.height); 2035 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2036 vc->vc_font.width); 2037 var.xres = virt_w * virt_fw; 2038 var.yres = virt_h * virt_fh; 2039 x_diff = info->var.xres - var.xres; 2040 y_diff = info->var.yres - var.yres; 2041 if (x_diff < 0 || x_diff > virt_fw || 2042 y_diff < 0 || y_diff > virt_fh) { 2043 const struct fb_videomode *mode; 2044 2045 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2046 mode = fb_find_best_mode(&var, &info->modelist); 2047 if (mode == NULL) 2048 return -EINVAL; 2049 display_to_var(&var, p); 2050 fb_videomode_to_var(&var, mode); 2051 2052 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2053 return -EINVAL; 2054 2055 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2056 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2057 var.activate = FB_ACTIVATE_NOW | 2058 FB_ACTIVATE_FORCE; 2059 fb_set_var(info, &var); 2060 } 2061 var_to_display(p, &info->var, info); 2062 ops->var = info->var; 2063 } 2064 updatescrollmode(p, info, vc); 2065 return 0; 2066 } 2067 2068 static int fbcon_switch(struct vc_data *vc) 2069 { 2070 struct fb_info *info, *old_info = NULL; 2071 struct fbcon_ops *ops; 2072 struct fbcon_display *p = &fb_display[vc->vc_num]; 2073 struct fb_var_screeninfo var; 2074 int i, ret, prev_console; 2075 2076 info = fbcon_info_from_console(vc->vc_num); 2077 ops = info->fbcon_par; 2078 2079 if (logo_shown >= 0) { 2080 struct vc_data *conp2 = vc_cons[logo_shown].d; 2081 2082 if (conp2->vc_top == logo_lines 2083 && conp2->vc_bottom == conp2->vc_rows) 2084 conp2->vc_top = 0; 2085 logo_shown = FBCON_LOGO_CANSHOW; 2086 } 2087 2088 prev_console = ops->currcon; 2089 if (prev_console != -1) 2090 old_info = fbcon_info_from_console(prev_console); 2091 /* 2092 * FIXME: If we have multiple fbdev's loaded, we need to 2093 * update all info->currcon. Perhaps, we can place this 2094 * in a centralized structure, but this might break some 2095 * drivers. 2096 * 2097 * info->currcon = vc->vc_num; 2098 */ 2099 fbcon_for_each_registered_fb(i) { 2100 if (fbcon_registered_fb[i]->fbcon_par) { 2101 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2102 2103 o->currcon = vc->vc_num; 2104 } 2105 } 2106 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2107 display_to_var(&var, p); 2108 var.activate = FB_ACTIVATE_NOW; 2109 2110 /* 2111 * make sure we don't unnecessarily trip the memcmp() 2112 * in fb_set_var() 2113 */ 2114 info->var.activate = var.activate; 2115 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2116 fb_set_var(info, &var); 2117 ops->var = info->var; 2118 2119 if (old_info != NULL && (old_info != info || 2120 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2121 if (info->fbops->fb_set_par) { 2122 ret = info->fbops->fb_set_par(info); 2123 2124 if (ret) 2125 printk(KERN_ERR "fbcon_switch: detected " 2126 "unhandled fb_set_par error, " 2127 "error code %d\n", ret); 2128 } 2129 2130 if (old_info != info) 2131 fbcon_del_cursor_work(old_info); 2132 } 2133 2134 if (fbcon_is_inactive(vc, info) || 2135 ops->blank_state != FB_BLANK_UNBLANK) 2136 fbcon_del_cursor_work(info); 2137 else 2138 fbcon_add_cursor_work(info); 2139 2140 set_blitting_type(vc, info); 2141 ops->cursor_reset = 1; 2142 2143 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2144 ops->rotate = FB_ROTATE_UR; 2145 set_blitting_type(vc, info); 2146 } 2147 2148 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2149 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2150 2151 if (vc->vc_font.charcount > 256) 2152 vc->vc_complement_mask <<= 1; 2153 2154 updatescrollmode(p, info, vc); 2155 2156 switch (fb_scrollmode(p)) { 2157 case SCROLL_WRAP_MOVE: 2158 scrollback_phys_max = p->vrows - vc->vc_rows; 2159 break; 2160 case SCROLL_PAN_MOVE: 2161 case SCROLL_PAN_REDRAW: 2162 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2163 if (scrollback_phys_max < 0) 2164 scrollback_phys_max = 0; 2165 break; 2166 default: 2167 scrollback_phys_max = 0; 2168 break; 2169 } 2170 2171 scrollback_max = 0; 2172 scrollback_current = 0; 2173 2174 if (!fbcon_is_inactive(vc, info)) { 2175 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2176 ops->update_start(info); 2177 } 2178 2179 fbcon_set_palette(vc, color_table); 2180 fbcon_clear_margins(vc, 0); 2181 2182 if (logo_shown == FBCON_LOGO_DRAW) { 2183 2184 logo_shown = fg_console; 2185 /* This is protected above by initmem_freed */ 2186 fb_show_logo(info, ops->rotate); 2187 update_region(vc, 2188 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2189 vc->vc_size_row * (vc->vc_bottom - 2190 vc->vc_top) / 2); 2191 return 0; 2192 } 2193 return 1; 2194 } 2195 2196 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2197 int blank) 2198 { 2199 if (blank) { 2200 unsigned short charmask = vc->vc_hi_font_mask ? 2201 0x1ff : 0xff; 2202 unsigned short oldc; 2203 2204 oldc = vc->vc_video_erase_char; 2205 vc->vc_video_erase_char &= charmask; 2206 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2207 vc->vc_video_erase_char = oldc; 2208 } 2209 } 2210 2211 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2212 { 2213 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2214 struct fbcon_ops *ops = info->fbcon_par; 2215 2216 if (mode_switch) { 2217 struct fb_var_screeninfo var = info->var; 2218 2219 ops->graphics = 1; 2220 2221 if (!blank) { 2222 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2223 FB_ACTIVATE_KD_TEXT; 2224 fb_set_var(info, &var); 2225 ops->graphics = 0; 2226 ops->var = info->var; 2227 } 2228 } 2229 2230 if (!fbcon_is_inactive(vc, info)) { 2231 if (ops->blank_state != blank) { 2232 ops->blank_state = blank; 2233 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2234 ops->cursor_flash = (!blank); 2235 2236 if (fb_blank(info, blank)) 2237 fbcon_generic_blank(vc, info, blank); 2238 } 2239 2240 if (!blank) 2241 update_screen(vc); 2242 } 2243 2244 if (mode_switch || fbcon_is_inactive(vc, info) || 2245 ops->blank_state != FB_BLANK_UNBLANK) 2246 fbcon_del_cursor_work(info); 2247 else 2248 fbcon_add_cursor_work(info); 2249 2250 return 0; 2251 } 2252 2253 static int fbcon_debug_enter(struct vc_data *vc) 2254 { 2255 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2256 struct fbcon_ops *ops = info->fbcon_par; 2257 2258 ops->save_graphics = ops->graphics; 2259 ops->graphics = 0; 2260 if (info->fbops->fb_debug_enter) 2261 info->fbops->fb_debug_enter(info); 2262 fbcon_set_palette(vc, color_table); 2263 return 0; 2264 } 2265 2266 static int fbcon_debug_leave(struct vc_data *vc) 2267 { 2268 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2269 struct fbcon_ops *ops = info->fbcon_par; 2270 2271 ops->graphics = ops->save_graphics; 2272 if (info->fbops->fb_debug_leave) 2273 info->fbops->fb_debug_leave(info); 2274 return 0; 2275 } 2276 2277 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 2278 { 2279 u8 *fontdata = vc->vc_font.data; 2280 u8 *data = font->data; 2281 int i, j; 2282 2283 font->width = vc->vc_font.width; 2284 font->height = vc->vc_font.height; 2285 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2286 if (!font->data) 2287 return 0; 2288 2289 if (font->width <= 8) { 2290 j = vc->vc_font.height; 2291 if (font->charcount * j > FNTSIZE(fontdata)) 2292 return -EINVAL; 2293 2294 for (i = 0; i < font->charcount; i++) { 2295 memcpy(data, fontdata, j); 2296 memset(data + j, 0, 32 - j); 2297 data += 32; 2298 fontdata += j; 2299 } 2300 } else if (font->width <= 16) { 2301 j = vc->vc_font.height * 2; 2302 if (font->charcount * j > FNTSIZE(fontdata)) 2303 return -EINVAL; 2304 2305 for (i = 0; i < font->charcount; i++) { 2306 memcpy(data, fontdata, j); 2307 memset(data + j, 0, 64 - j); 2308 data += 64; 2309 fontdata += j; 2310 } 2311 } else if (font->width <= 24) { 2312 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2313 return -EINVAL; 2314 2315 for (i = 0; i < font->charcount; i++) { 2316 for (j = 0; j < vc->vc_font.height; j++) { 2317 *data++ = fontdata[0]; 2318 *data++ = fontdata[1]; 2319 *data++ = fontdata[2]; 2320 fontdata += sizeof(u32); 2321 } 2322 memset(data, 0, 3 * (32 - j)); 2323 data += 3 * (32 - j); 2324 } 2325 } else { 2326 j = vc->vc_font.height * 4; 2327 if (font->charcount * j > FNTSIZE(fontdata)) 2328 return -EINVAL; 2329 2330 for (i = 0; i < font->charcount; i++) { 2331 memcpy(data, fontdata, j); 2332 memset(data + j, 0, 128 - j); 2333 data += 128; 2334 fontdata += j; 2335 } 2336 } 2337 return 0; 2338 } 2339 2340 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2341 static void set_vc_hi_font(struct vc_data *vc, bool set) 2342 { 2343 if (!set) { 2344 vc->vc_hi_font_mask = 0; 2345 if (vc->vc_can_do_color) { 2346 vc->vc_complement_mask >>= 1; 2347 vc->vc_s_complement_mask >>= 1; 2348 } 2349 2350 /* ++Edmund: reorder the attribute bits */ 2351 if (vc->vc_can_do_color) { 2352 unsigned short *cp = 2353 (unsigned short *) vc->vc_origin; 2354 int count = vc->vc_screenbuf_size / 2; 2355 unsigned short c; 2356 for (; count > 0; count--, cp++) { 2357 c = scr_readw(cp); 2358 scr_writew(((c & 0xfe00) >> 1) | 2359 (c & 0xff), cp); 2360 } 2361 c = vc->vc_video_erase_char; 2362 vc->vc_video_erase_char = 2363 ((c & 0xfe00) >> 1) | (c & 0xff); 2364 vc->vc_attr >>= 1; 2365 } 2366 } else { 2367 vc->vc_hi_font_mask = 0x100; 2368 if (vc->vc_can_do_color) { 2369 vc->vc_complement_mask <<= 1; 2370 vc->vc_s_complement_mask <<= 1; 2371 } 2372 2373 /* ++Edmund: reorder the attribute bits */ 2374 { 2375 unsigned short *cp = 2376 (unsigned short *) vc->vc_origin; 2377 int count = vc->vc_screenbuf_size / 2; 2378 unsigned short c; 2379 for (; count > 0; count--, cp++) { 2380 unsigned short newc; 2381 c = scr_readw(cp); 2382 if (vc->vc_can_do_color) 2383 newc = 2384 ((c & 0xff00) << 1) | (c & 2385 0xff); 2386 else 2387 newc = c & ~0x100; 2388 scr_writew(newc, cp); 2389 } 2390 c = vc->vc_video_erase_char; 2391 if (vc->vc_can_do_color) { 2392 vc->vc_video_erase_char = 2393 ((c & 0xff00) << 1) | (c & 0xff); 2394 vc->vc_attr <<= 1; 2395 } else 2396 vc->vc_video_erase_char = c & ~0x100; 2397 } 2398 } 2399 } 2400 2401 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2402 const u8 * data, int userfont) 2403 { 2404 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2405 struct fbcon_ops *ops = info->fbcon_par; 2406 struct fbcon_display *p = &fb_display[vc->vc_num]; 2407 int resize; 2408 char *old_data = NULL; 2409 2410 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2411 if (p->userfont) 2412 old_data = vc->vc_font.data; 2413 vc->vc_font.data = (void *)(p->fontdata = data); 2414 if ((p->userfont = userfont)) 2415 REFCOUNT(data)++; 2416 vc->vc_font.width = w; 2417 vc->vc_font.height = h; 2418 vc->vc_font.charcount = charcount; 2419 if (vc->vc_hi_font_mask && charcount == 256) 2420 set_vc_hi_font(vc, false); 2421 else if (!vc->vc_hi_font_mask && charcount == 512) 2422 set_vc_hi_font(vc, true); 2423 2424 if (resize) { 2425 int cols, rows; 2426 2427 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2428 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2429 cols /= w; 2430 rows /= h; 2431 vc_resize(vc, cols, rows); 2432 } else if (con_is_visible(vc) 2433 && vc->vc_mode == KD_TEXT) { 2434 fbcon_clear_margins(vc, 0); 2435 update_screen(vc); 2436 } 2437 2438 if (old_data && (--REFCOUNT(old_data) == 0)) 2439 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2440 return 0; 2441 } 2442 2443 /* 2444 * User asked to set font; we are guaranteed that 2445 * a) width and height are in range 1..32 2446 * b) charcount does not exceed 512 2447 * but lets not assume that, since someone might someday want to use larger 2448 * fonts. And charcount of 512 is small for unicode support. 2449 * 2450 * However, user space gives the font in 32 rows , regardless of 2451 * actual font height. So a new API is needed if support for larger fonts 2452 * is ever implemented. 2453 */ 2454 2455 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2456 unsigned int flags) 2457 { 2458 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2459 unsigned charcount = font->charcount; 2460 int w = font->width; 2461 int h = font->height; 2462 int size; 2463 int i, csum; 2464 u8 *new_data, *data = font->data; 2465 int pitch = PITCH(font->width); 2466 2467 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2468 * If not this check should be changed to charcount < 256 */ 2469 if (charcount != 256 && charcount != 512) 2470 return -EINVAL; 2471 2472 /* font bigger than screen resolution ? */ 2473 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2474 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2475 return -EINVAL; 2476 2477 /* Make sure drawing engine can handle the font */ 2478 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 2479 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 2480 return -EINVAL; 2481 2482 /* Make sure driver can handle the font length */ 2483 if (fbcon_invalid_charcount(info, charcount)) 2484 return -EINVAL; 2485 2486 size = CALC_FONTSZ(h, pitch, charcount); 2487 2488 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2489 2490 if (!new_data) 2491 return -ENOMEM; 2492 2493 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2494 2495 new_data += FONT_EXTRA_WORDS * sizeof(int); 2496 FNTSIZE(new_data) = size; 2497 REFCOUNT(new_data) = 0; /* usage counter */ 2498 for (i=0; i< charcount; i++) { 2499 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 2500 } 2501 2502 /* Since linux has a nice crc32 function use it for counting font 2503 * checksums. */ 2504 csum = crc32(0, new_data, size); 2505 2506 FNTSUM(new_data) = csum; 2507 /* Check if the same font is on some other console already */ 2508 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2509 struct vc_data *tmp = vc_cons[i].d; 2510 2511 if (fb_display[i].userfont && 2512 fb_display[i].fontdata && 2513 FNTSUM(fb_display[i].fontdata) == csum && 2514 FNTSIZE(fb_display[i].fontdata) == size && 2515 tmp->vc_font.width == w && 2516 !memcmp(fb_display[i].fontdata, new_data, size)) { 2517 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2518 new_data = (u8 *)fb_display[i].fontdata; 2519 break; 2520 } 2521 } 2522 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2523 } 2524 2525 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2526 { 2527 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2528 const struct font_desc *f; 2529 2530 if (!name) 2531 f = get_default_font(info->var.xres, info->var.yres, 2532 info->pixmap.blit_x, info->pixmap.blit_y); 2533 else if (!(f = find_font(name))) 2534 return -ENOENT; 2535 2536 font->width = f->width; 2537 font->height = f->height; 2538 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2539 } 2540 2541 static u16 palette_red[16]; 2542 static u16 palette_green[16]; 2543 static u16 palette_blue[16]; 2544 2545 static struct fb_cmap palette_cmap = { 2546 0, 16, palette_red, palette_green, palette_blue, NULL 2547 }; 2548 2549 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2550 { 2551 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2552 int i, j, k, depth; 2553 u8 val; 2554 2555 if (fbcon_is_inactive(vc, info)) 2556 return; 2557 2558 if (!con_is_visible(vc)) 2559 return; 2560 2561 depth = fb_get_color_depth(&info->var, &info->fix); 2562 if (depth > 3) { 2563 for (i = j = 0; i < 16; i++) { 2564 k = table[i]; 2565 val = vc->vc_palette[j++]; 2566 palette_red[k] = (val << 8) | val; 2567 val = vc->vc_palette[j++]; 2568 palette_green[k] = (val << 8) | val; 2569 val = vc->vc_palette[j++]; 2570 palette_blue[k] = (val << 8) | val; 2571 } 2572 palette_cmap.len = 16; 2573 palette_cmap.start = 0; 2574 /* 2575 * If framebuffer is capable of less than 16 colors, 2576 * use default palette of fbcon. 2577 */ 2578 } else 2579 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2580 2581 fb_set_cmap(&palette_cmap, info); 2582 } 2583 2584 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2585 { 2586 return (u16 *) (vc->vc_origin + offset); 2587 } 2588 2589 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2590 int *px, int *py) 2591 { 2592 unsigned long ret; 2593 int x, y; 2594 2595 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2596 unsigned long offset = (pos - vc->vc_origin) / 2; 2597 2598 x = offset % vc->vc_cols; 2599 y = offset / vc->vc_cols; 2600 ret = pos + (vc->vc_cols - x) * 2; 2601 } else { 2602 /* Should not happen */ 2603 x = y = 0; 2604 ret = vc->vc_origin; 2605 } 2606 if (px) 2607 *px = x; 2608 if (py) 2609 *py = y; 2610 return ret; 2611 } 2612 2613 /* As we might be inside of softback, we may work with non-contiguous buffer, 2614 that's why we have to use a separate routine. */ 2615 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2616 { 2617 while (cnt--) { 2618 u16 a = scr_readw(p); 2619 if (!vc->vc_can_do_color) 2620 a ^= 0x0800; 2621 else if (vc->vc_hi_font_mask == 0x100) 2622 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2623 (((a) & 0x0e00) << 4); 2624 else 2625 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2626 (((a) & 0x0700) << 4); 2627 scr_writew(a, p++); 2628 } 2629 } 2630 2631 void fbcon_suspended(struct fb_info *info) 2632 { 2633 struct vc_data *vc = NULL; 2634 struct fbcon_ops *ops = info->fbcon_par; 2635 2636 if (!ops || ops->currcon < 0) 2637 return; 2638 vc = vc_cons[ops->currcon].d; 2639 2640 /* Clear cursor, restore saved data */ 2641 fbcon_cursor(vc, CM_ERASE); 2642 } 2643 2644 void fbcon_resumed(struct fb_info *info) 2645 { 2646 struct vc_data *vc; 2647 struct fbcon_ops *ops = info->fbcon_par; 2648 2649 if (!ops || ops->currcon < 0) 2650 return; 2651 vc = vc_cons[ops->currcon].d; 2652 2653 update_screen(vc); 2654 } 2655 2656 static void fbcon_modechanged(struct fb_info *info) 2657 { 2658 struct fbcon_ops *ops = info->fbcon_par; 2659 struct vc_data *vc; 2660 struct fbcon_display *p; 2661 int rows, cols; 2662 2663 if (!ops || ops->currcon < 0) 2664 return; 2665 vc = vc_cons[ops->currcon].d; 2666 if (vc->vc_mode != KD_TEXT || 2667 fbcon_info_from_console(ops->currcon) != info) 2668 return; 2669 2670 p = &fb_display[vc->vc_num]; 2671 set_blitting_type(vc, info); 2672 2673 if (con_is_visible(vc)) { 2674 var_to_display(p, &info->var, info); 2675 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2676 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2677 cols /= vc->vc_font.width; 2678 rows /= vc->vc_font.height; 2679 vc_resize(vc, cols, rows); 2680 updatescrollmode(p, info, vc); 2681 scrollback_max = 0; 2682 scrollback_current = 0; 2683 2684 if (!fbcon_is_inactive(vc, info)) { 2685 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2686 ops->update_start(info); 2687 } 2688 2689 fbcon_set_palette(vc, color_table); 2690 update_screen(vc); 2691 } 2692 } 2693 2694 static void fbcon_set_all_vcs(struct fb_info *info) 2695 { 2696 struct fbcon_ops *ops = info->fbcon_par; 2697 struct vc_data *vc; 2698 struct fbcon_display *p; 2699 int i, rows, cols, fg = -1; 2700 2701 if (!ops || ops->currcon < 0) 2702 return; 2703 2704 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2705 vc = vc_cons[i].d; 2706 if (!vc || vc->vc_mode != KD_TEXT || 2707 fbcon_info_from_console(i) != info) 2708 continue; 2709 2710 if (con_is_visible(vc)) { 2711 fg = i; 2712 continue; 2713 } 2714 2715 p = &fb_display[vc->vc_num]; 2716 set_blitting_type(vc, info); 2717 var_to_display(p, &info->var, info); 2718 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2719 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2720 cols /= vc->vc_font.width; 2721 rows /= vc->vc_font.height; 2722 vc_resize(vc, cols, rows); 2723 } 2724 2725 if (fg != -1) 2726 fbcon_modechanged(info); 2727 } 2728 2729 2730 void fbcon_update_vcs(struct fb_info *info, bool all) 2731 { 2732 if (all) 2733 fbcon_set_all_vcs(info); 2734 else 2735 fbcon_modechanged(info); 2736 } 2737 EXPORT_SYMBOL(fbcon_update_vcs); 2738 2739 /* let fbcon check if it supports a new screen resolution */ 2740 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2741 { 2742 struct fbcon_ops *ops = info->fbcon_par; 2743 struct vc_data *vc; 2744 unsigned int i; 2745 2746 WARN_CONSOLE_UNLOCKED(); 2747 2748 if (!ops) 2749 return 0; 2750 2751 /* prevent setting a screen size which is smaller than font size */ 2752 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2753 vc = vc_cons[i].d; 2754 if (!vc || vc->vc_mode != KD_TEXT || 2755 fbcon_info_from_console(i) != info) 2756 continue; 2757 2758 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2759 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2760 return -EINVAL; 2761 } 2762 2763 return 0; 2764 } 2765 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2766 2767 int fbcon_mode_deleted(struct fb_info *info, 2768 struct fb_videomode *mode) 2769 { 2770 struct fb_info *fb_info; 2771 struct fbcon_display *p; 2772 int i, j, found = 0; 2773 2774 /* before deletion, ensure that mode is not in use */ 2775 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2776 j = con2fb_map[i]; 2777 if (j == -1) 2778 continue; 2779 fb_info = fbcon_registered_fb[j]; 2780 if (fb_info != info) 2781 continue; 2782 p = &fb_display[i]; 2783 if (!p || !p->mode) 2784 continue; 2785 if (fb_mode_is_equal(p->mode, mode)) { 2786 found = 1; 2787 break; 2788 } 2789 } 2790 return found; 2791 } 2792 2793 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2794 static void fbcon_unbind(void) 2795 { 2796 int ret; 2797 2798 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2799 fbcon_is_default); 2800 2801 if (!ret) 2802 fbcon_has_console_bind = 0; 2803 } 2804 #else 2805 static inline void fbcon_unbind(void) {} 2806 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2807 2808 void fbcon_fb_unbind(struct fb_info *info) 2809 { 2810 int i, new_idx = -1; 2811 int idx = info->node; 2812 2813 console_lock(); 2814 2815 if (!fbcon_has_console_bind) { 2816 console_unlock(); 2817 return; 2818 } 2819 2820 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2821 if (con2fb_map[i] != idx && 2822 con2fb_map[i] != -1) { 2823 new_idx = con2fb_map[i]; 2824 break; 2825 } 2826 } 2827 2828 if (new_idx != -1) { 2829 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2830 if (con2fb_map[i] == idx) 2831 set_con2fb_map(i, new_idx, 0); 2832 } 2833 } else { 2834 struct fb_info *info = fbcon_registered_fb[idx]; 2835 2836 /* This is sort of like set_con2fb_map, except it maps 2837 * the consoles to no device and then releases the 2838 * oldinfo to free memory and cancel the cursor blink 2839 * timer. I can imagine this just becoming part of 2840 * set_con2fb_map where new_idx is -1 2841 */ 2842 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2843 if (con2fb_map[i] == idx) { 2844 con2fb_map[i] = -1; 2845 if (!search_fb_in_map(idx)) { 2846 con2fb_release_oldinfo(vc_cons[i].d, 2847 info, NULL); 2848 } 2849 } 2850 } 2851 fbcon_unbind(); 2852 } 2853 2854 console_unlock(); 2855 } 2856 2857 void fbcon_fb_unregistered(struct fb_info *info) 2858 { 2859 int i, idx; 2860 2861 console_lock(); 2862 2863 fbcon_registered_fb[info->node] = NULL; 2864 fbcon_num_registered_fb--; 2865 2866 if (deferred_takeover) { 2867 console_unlock(); 2868 return; 2869 } 2870 2871 idx = info->node; 2872 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2873 if (con2fb_map[i] == idx) 2874 con2fb_map[i] = -1; 2875 } 2876 2877 if (idx == info_idx) { 2878 info_idx = -1; 2879 2880 fbcon_for_each_registered_fb(i) { 2881 info_idx = i; 2882 break; 2883 } 2884 } 2885 2886 if (info_idx != -1) { 2887 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2888 if (con2fb_map[i] == -1) 2889 con2fb_map[i] = info_idx; 2890 } 2891 } 2892 2893 if (primary_device == idx) 2894 primary_device = -1; 2895 2896 if (!fbcon_num_registered_fb) 2897 do_unregister_con_driver(&fb_con); 2898 console_unlock(); 2899 } 2900 2901 void fbcon_remap_all(struct fb_info *info) 2902 { 2903 int i, idx = info->node; 2904 2905 console_lock(); 2906 if (deferred_takeover) { 2907 for (i = first_fb_vc; i <= last_fb_vc; i++) 2908 con2fb_map_boot[i] = idx; 2909 fbcon_map_override(); 2910 console_unlock(); 2911 return; 2912 } 2913 2914 for (i = first_fb_vc; i <= last_fb_vc; i++) 2915 set_con2fb_map(i, idx, 0); 2916 2917 if (con_is_bound(&fb_con)) { 2918 printk(KERN_INFO "fbcon: Remapping primary device, " 2919 "fb%i, to tty %i-%i\n", idx, 2920 first_fb_vc + 1, last_fb_vc + 1); 2921 info_idx = idx; 2922 } 2923 console_unlock(); 2924 } 2925 2926 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2927 static void fbcon_select_primary(struct fb_info *info) 2928 { 2929 if (!map_override && primary_device == -1 && 2930 fb_is_primary_device(info)) { 2931 int i; 2932 2933 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2934 info->fix.id, info->node); 2935 primary_device = info->node; 2936 2937 for (i = first_fb_vc; i <= last_fb_vc; i++) 2938 con2fb_map_boot[i] = primary_device; 2939 2940 if (con_is_bound(&fb_con)) { 2941 printk(KERN_INFO "fbcon: Remapping primary device, " 2942 "fb%i, to tty %i-%i\n", info->node, 2943 first_fb_vc + 1, last_fb_vc + 1); 2944 info_idx = primary_device; 2945 } 2946 } 2947 2948 } 2949 #else 2950 static inline void fbcon_select_primary(struct fb_info *info) 2951 { 2952 return; 2953 } 2954 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2955 2956 static bool lockless_register_fb; 2957 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2958 MODULE_PARM_DESC(lockless_register_fb, 2959 "Lockless framebuffer registration for debugging [default=off]"); 2960 2961 /* called with console_lock held */ 2962 static int do_fb_registered(struct fb_info *info) 2963 { 2964 int ret = 0, i, idx; 2965 2966 WARN_CONSOLE_UNLOCKED(); 2967 2968 fbcon_registered_fb[info->node] = info; 2969 fbcon_num_registered_fb++; 2970 2971 idx = info->node; 2972 fbcon_select_primary(info); 2973 2974 if (deferred_takeover) { 2975 pr_info("fbcon: Deferring console take-over\n"); 2976 return 0; 2977 } 2978 2979 if (info_idx == -1) { 2980 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2981 if (con2fb_map_boot[i] == idx) { 2982 info_idx = idx; 2983 break; 2984 } 2985 } 2986 2987 if (info_idx != -1) 2988 ret = do_fbcon_takeover(1); 2989 } else { 2990 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2991 if (con2fb_map_boot[i] == idx) 2992 set_con2fb_map(i, idx, 0); 2993 } 2994 } 2995 2996 return ret; 2997 } 2998 2999 int fbcon_fb_registered(struct fb_info *info) 3000 { 3001 int ret; 3002 3003 if (!lockless_register_fb) 3004 console_lock(); 3005 else 3006 atomic_inc(&ignore_console_lock_warning); 3007 3008 ret = do_fb_registered(info); 3009 3010 if (!lockless_register_fb) 3011 console_unlock(); 3012 else 3013 atomic_dec(&ignore_console_lock_warning); 3014 3015 return ret; 3016 } 3017 3018 void fbcon_fb_blanked(struct fb_info *info, int blank) 3019 { 3020 struct fbcon_ops *ops = info->fbcon_par; 3021 struct vc_data *vc; 3022 3023 if (!ops || ops->currcon < 0) 3024 return; 3025 3026 vc = vc_cons[ops->currcon].d; 3027 if (vc->vc_mode != KD_TEXT || 3028 fbcon_info_from_console(ops->currcon) != info) 3029 return; 3030 3031 if (con_is_visible(vc)) { 3032 if (blank) 3033 do_blank_screen(0); 3034 else 3035 do_unblank_screen(0); 3036 } 3037 ops->blank_state = blank; 3038 } 3039 3040 void fbcon_new_modelist(struct fb_info *info) 3041 { 3042 int i; 3043 struct vc_data *vc; 3044 struct fb_var_screeninfo var; 3045 const struct fb_videomode *mode; 3046 3047 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3048 if (fbcon_info_from_console(i) != info) 3049 continue; 3050 if (!fb_display[i].mode) 3051 continue; 3052 vc = vc_cons[i].d; 3053 display_to_var(&var, &fb_display[i]); 3054 mode = fb_find_nearest_mode(fb_display[i].mode, 3055 &info->modelist); 3056 fb_videomode_to_var(&var, mode); 3057 fbcon_set_disp(info, &var, vc->vc_num); 3058 } 3059 } 3060 3061 void fbcon_get_requirement(struct fb_info *info, 3062 struct fb_blit_caps *caps) 3063 { 3064 struct vc_data *vc; 3065 3066 if (caps->flags) { 3067 int i, charcnt; 3068 3069 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3070 vc = vc_cons[i].d; 3071 if (vc && vc->vc_mode == KD_TEXT && 3072 info->node == con2fb_map[i]) { 3073 caps->x |= 1 << (vc->vc_font.width - 1); 3074 caps->y |= 1 << (vc->vc_font.height - 1); 3075 charcnt = vc->vc_font.charcount; 3076 if (caps->len < charcnt) 3077 caps->len = charcnt; 3078 } 3079 } 3080 } else { 3081 vc = vc_cons[fg_console].d; 3082 3083 if (vc && vc->vc_mode == KD_TEXT && 3084 info->node == con2fb_map[fg_console]) { 3085 caps->x = 1 << (vc->vc_font.width - 1); 3086 caps->y = 1 << (vc->vc_font.height - 1); 3087 caps->len = vc->vc_font.charcount; 3088 } 3089 } 3090 } 3091 3092 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3093 { 3094 struct fb_con2fbmap con2fb; 3095 int ret; 3096 3097 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3098 return -EFAULT; 3099 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3100 return -EINVAL; 3101 if (con2fb.framebuffer >= FB_MAX) 3102 return -EINVAL; 3103 if (!fbcon_registered_fb[con2fb.framebuffer]) 3104 request_module("fb%d", con2fb.framebuffer); 3105 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3106 return -EINVAL; 3107 } 3108 3109 console_lock(); 3110 ret = set_con2fb_map(con2fb.console - 1, 3111 con2fb.framebuffer, 1); 3112 console_unlock(); 3113 3114 return ret; 3115 } 3116 3117 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3118 { 3119 struct fb_con2fbmap con2fb; 3120 3121 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3122 return -EFAULT; 3123 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3124 return -EINVAL; 3125 3126 console_lock(); 3127 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3128 console_unlock(); 3129 3130 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3131 } 3132 3133 /* 3134 * The console `switch' structure for the frame buffer based console 3135 */ 3136 3137 static const struct consw fb_con = { 3138 .owner = THIS_MODULE, 3139 .con_startup = fbcon_startup, 3140 .con_init = fbcon_init, 3141 .con_deinit = fbcon_deinit, 3142 .con_clear = fbcon_clear, 3143 .con_putc = fbcon_putc, 3144 .con_putcs = fbcon_putcs, 3145 .con_cursor = fbcon_cursor, 3146 .con_scroll = fbcon_scroll, 3147 .con_switch = fbcon_switch, 3148 .con_blank = fbcon_blank, 3149 .con_font_set = fbcon_set_font, 3150 .con_font_get = fbcon_get_font, 3151 .con_font_default = fbcon_set_def_font, 3152 .con_set_palette = fbcon_set_palette, 3153 .con_invert_region = fbcon_invert_region, 3154 .con_screen_pos = fbcon_screen_pos, 3155 .con_getxy = fbcon_getxy, 3156 .con_resize = fbcon_resize, 3157 .con_debug_enter = fbcon_debug_enter, 3158 .con_debug_leave = fbcon_debug_leave, 3159 }; 3160 3161 static ssize_t store_rotate(struct device *device, 3162 struct device_attribute *attr, const char *buf, 3163 size_t count) 3164 { 3165 struct fb_info *info; 3166 int rotate, idx; 3167 char **last = NULL; 3168 3169 console_lock(); 3170 idx = con2fb_map[fg_console]; 3171 3172 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3173 goto err; 3174 3175 info = fbcon_registered_fb[idx]; 3176 rotate = simple_strtoul(buf, last, 0); 3177 fbcon_rotate(info, rotate); 3178 err: 3179 console_unlock(); 3180 return count; 3181 } 3182 3183 static ssize_t store_rotate_all(struct device *device, 3184 struct device_attribute *attr,const char *buf, 3185 size_t count) 3186 { 3187 struct fb_info *info; 3188 int rotate, idx; 3189 char **last = NULL; 3190 3191 console_lock(); 3192 idx = con2fb_map[fg_console]; 3193 3194 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3195 goto err; 3196 3197 info = fbcon_registered_fb[idx]; 3198 rotate = simple_strtoul(buf, last, 0); 3199 fbcon_rotate_all(info, rotate); 3200 err: 3201 console_unlock(); 3202 return count; 3203 } 3204 3205 static ssize_t show_rotate(struct device *device, 3206 struct device_attribute *attr,char *buf) 3207 { 3208 struct fb_info *info; 3209 int rotate = 0, idx; 3210 3211 console_lock(); 3212 idx = con2fb_map[fg_console]; 3213 3214 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3215 goto err; 3216 3217 info = fbcon_registered_fb[idx]; 3218 rotate = fbcon_get_rotate(info); 3219 err: 3220 console_unlock(); 3221 return sysfs_emit(buf, "%d\n", rotate); 3222 } 3223 3224 static ssize_t show_cursor_blink(struct device *device, 3225 struct device_attribute *attr, char *buf) 3226 { 3227 struct fb_info *info; 3228 struct fbcon_ops *ops; 3229 int idx, blink = -1; 3230 3231 console_lock(); 3232 idx = con2fb_map[fg_console]; 3233 3234 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3235 goto err; 3236 3237 info = fbcon_registered_fb[idx]; 3238 ops = info->fbcon_par; 3239 3240 if (!ops) 3241 goto err; 3242 3243 blink = delayed_work_pending(&ops->cursor_work); 3244 err: 3245 console_unlock(); 3246 return sysfs_emit(buf, "%d\n", blink); 3247 } 3248 3249 static ssize_t store_cursor_blink(struct device *device, 3250 struct device_attribute *attr, 3251 const char *buf, size_t count) 3252 { 3253 struct fb_info *info; 3254 int blink, idx; 3255 char **last = NULL; 3256 3257 console_lock(); 3258 idx = con2fb_map[fg_console]; 3259 3260 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3261 goto err; 3262 3263 info = fbcon_registered_fb[idx]; 3264 3265 if (!info->fbcon_par) 3266 goto err; 3267 3268 blink = simple_strtoul(buf, last, 0); 3269 3270 if (blink) { 3271 fbcon_cursor_noblink = 0; 3272 fbcon_add_cursor_work(info); 3273 } else { 3274 fbcon_cursor_noblink = 1; 3275 fbcon_del_cursor_work(info); 3276 } 3277 3278 err: 3279 console_unlock(); 3280 return count; 3281 } 3282 3283 static struct device_attribute device_attrs[] = { 3284 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3285 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3286 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3287 store_cursor_blink), 3288 }; 3289 3290 static int fbcon_init_device(void) 3291 { 3292 int i, error = 0; 3293 3294 fbcon_has_sysfs = 1; 3295 3296 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3297 error = device_create_file(fbcon_device, &device_attrs[i]); 3298 3299 if (error) 3300 break; 3301 } 3302 3303 if (error) { 3304 while (--i >= 0) 3305 device_remove_file(fbcon_device, &device_attrs[i]); 3306 3307 fbcon_has_sysfs = 0; 3308 } 3309 3310 return 0; 3311 } 3312 3313 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3314 static void fbcon_register_existing_fbs(struct work_struct *work) 3315 { 3316 int i; 3317 3318 console_lock(); 3319 3320 deferred_takeover = false; 3321 logo_shown = FBCON_LOGO_DONTSHOW; 3322 3323 fbcon_for_each_registered_fb(i) 3324 do_fb_registered(fbcon_registered_fb[i]); 3325 3326 console_unlock(); 3327 } 3328 3329 static struct notifier_block fbcon_output_nb; 3330 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3331 3332 static int fbcon_output_notifier(struct notifier_block *nb, 3333 unsigned long action, void *data) 3334 { 3335 WARN_CONSOLE_UNLOCKED(); 3336 3337 pr_info("fbcon: Taking over console\n"); 3338 3339 dummycon_unregister_output_notifier(&fbcon_output_nb); 3340 3341 /* We may get called in atomic context */ 3342 schedule_work(&fbcon_deferred_takeover_work); 3343 3344 return NOTIFY_OK; 3345 } 3346 #endif 3347 3348 static void fbcon_start(void) 3349 { 3350 WARN_CONSOLE_UNLOCKED(); 3351 3352 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3353 if (conswitchp != &dummy_con) 3354 deferred_takeover = false; 3355 3356 if (deferred_takeover) { 3357 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3358 dummycon_register_output_notifier(&fbcon_output_nb); 3359 return; 3360 } 3361 #endif 3362 } 3363 3364 void __init fb_console_init(void) 3365 { 3366 int i; 3367 3368 console_lock(); 3369 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3370 "fbcon"); 3371 3372 if (IS_ERR(fbcon_device)) { 3373 printk(KERN_WARNING "Unable to create device " 3374 "for fbcon; errno = %ld\n", 3375 PTR_ERR(fbcon_device)); 3376 fbcon_device = NULL; 3377 } else 3378 fbcon_init_device(); 3379 3380 for (i = 0; i < MAX_NR_CONSOLES; i++) 3381 con2fb_map[i] = -1; 3382 3383 fbcon_start(); 3384 console_unlock(); 3385 } 3386 3387 #ifdef MODULE 3388 3389 static void __exit fbcon_deinit_device(void) 3390 { 3391 int i; 3392 3393 if (fbcon_has_sysfs) { 3394 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3395 device_remove_file(fbcon_device, &device_attrs[i]); 3396 3397 fbcon_has_sysfs = 0; 3398 } 3399 } 3400 3401 void __exit fb_console_exit(void) 3402 { 3403 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3404 console_lock(); 3405 if (deferred_takeover) 3406 dummycon_unregister_output_notifier(&fbcon_output_nb); 3407 console_unlock(); 3408 3409 cancel_work_sync(&fbcon_deferred_takeover_work); 3410 #endif 3411 3412 console_lock(); 3413 fbcon_deinit_device(); 3414 device_destroy(fb_class, MKDEV(0, 0)); 3415 3416 do_unregister_con_driver(&fb_con); 3417 console_unlock(); 3418 } 3419 #endif 3420