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/irq.h> 79 80 #include "fbcon.h" 81 82 /* 83 * FIXME: Locking 84 * 85 * - fbcon state itself is protected by the console_lock, and the code does a 86 * pretty good job at making sure that lock is held everywhere it's needed. 87 * 88 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 89 * means concurrent access to the same fbdev from both fbcon and userspace 90 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 91 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 92 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 93 * fbmem.c cannot use locking asserts, and there's lots of callers which get 94 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 95 */ 96 97 enum { 98 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 99 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 100 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 101 }; 102 103 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 104 105 struct fb_info *fbcon_registered_fb[FB_MAX]; 106 int fbcon_num_registered_fb; 107 108 #define fbcon_for_each_registered_fb(i) \ 109 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 110 if (!fbcon_registered_fb[i]) {} else 111 112 static signed char con2fb_map[MAX_NR_CONSOLES]; 113 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 114 115 static struct fb_info *fbcon_info_from_console(int console) 116 { 117 WARN_CONSOLE_UNLOCKED(); 118 119 return fbcon_registered_fb[con2fb_map[console]]; 120 } 121 122 static int logo_lines; 123 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 124 enums. */ 125 static int logo_shown = FBCON_LOGO_CANSHOW; 126 /* console mappings */ 127 static unsigned int first_fb_vc; 128 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 129 static int fbcon_is_default = 1; 130 static int primary_device = -1; 131 static int fbcon_has_console_bind; 132 133 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 134 static int map_override; 135 136 static inline void fbcon_map_override(void) 137 { 138 map_override = 1; 139 } 140 #else 141 static inline void fbcon_map_override(void) 142 { 143 } 144 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 145 146 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 147 static bool deferred_takeover = true; 148 #else 149 #define deferred_takeover false 150 #endif 151 152 /* font data */ 153 static char fontname[40]; 154 155 /* current fb_info */ 156 static int info_idx = -1; 157 158 /* console rotation */ 159 static int initial_rotation = -1; 160 static int fbcon_has_sysfs; 161 static int margin_color; 162 163 static const struct consw fb_con; 164 165 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 166 167 static int fbcon_cursor_noblink; 168 169 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 170 171 /* 172 * Interface used by the world 173 */ 174 175 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 176 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 177 178 /* 179 * Internal routines 180 */ 181 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 182 int unit); 183 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 184 int line, int count, int dy); 185 static void fbcon_modechanged(struct fb_info *info); 186 static void fbcon_set_all_vcs(struct fb_info *info); 187 188 static struct device *fbcon_device; 189 190 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 191 static inline void fbcon_set_rotation(struct fb_info *info) 192 { 193 struct fbcon_ops *ops = info->fbcon_par; 194 195 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 196 ops->p->con_rotate < 4) 197 ops->rotate = ops->p->con_rotate; 198 else 199 ops->rotate = 0; 200 } 201 202 static void fbcon_rotate(struct fb_info *info, u32 rotate) 203 { 204 struct fbcon_ops *ops= info->fbcon_par; 205 struct fb_info *fb_info; 206 207 if (!ops || ops->currcon == -1) 208 return; 209 210 fb_info = fbcon_info_from_console(ops->currcon); 211 212 if (info == fb_info) { 213 struct fbcon_display *p = &fb_display[ops->currcon]; 214 215 if (rotate < 4) 216 p->con_rotate = rotate; 217 else 218 p->con_rotate = 0; 219 220 fbcon_modechanged(info); 221 } 222 } 223 224 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 225 { 226 struct fbcon_ops *ops = info->fbcon_par; 227 struct vc_data *vc; 228 struct fbcon_display *p; 229 int i; 230 231 if (!ops || ops->currcon < 0 || rotate > 3) 232 return; 233 234 for (i = first_fb_vc; i <= last_fb_vc; i++) { 235 vc = vc_cons[i].d; 236 if (!vc || vc->vc_mode != KD_TEXT || 237 fbcon_info_from_console(i) != info) 238 continue; 239 240 p = &fb_display[vc->vc_num]; 241 p->con_rotate = rotate; 242 } 243 244 fbcon_set_all_vcs(info); 245 } 246 #else 247 static inline void fbcon_set_rotation(struct fb_info *info) 248 { 249 struct fbcon_ops *ops = info->fbcon_par; 250 251 ops->rotate = FB_ROTATE_UR; 252 } 253 254 static void fbcon_rotate(struct fb_info *info, u32 rotate) 255 { 256 return; 257 } 258 259 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 260 { 261 return; 262 } 263 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 264 265 static int fbcon_get_rotate(struct fb_info *info) 266 { 267 struct fbcon_ops *ops = info->fbcon_par; 268 269 return (ops) ? ops->rotate : 0; 270 } 271 272 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 273 { 274 struct fbcon_ops *ops = info->fbcon_par; 275 276 return (info->state != FBINFO_STATE_RUNNING || 277 vc->vc_mode != KD_TEXT || ops->graphics); 278 } 279 280 static int get_color(struct vc_data *vc, struct fb_info *info, 281 u16 c, int is_fg) 282 { 283 int depth = fb_get_color_depth(&info->var, &info->fix); 284 int color = 0; 285 286 if (console_blanked) { 287 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 288 289 c = vc->vc_video_erase_char & charmask; 290 } 291 292 if (depth != 1) 293 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 294 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 295 296 switch (depth) { 297 case 1: 298 { 299 int col = mono_col(info); 300 /* 0 or 1 */ 301 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 302 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 303 304 if (console_blanked) 305 fg = bg; 306 307 color = (is_fg) ? fg : bg; 308 break; 309 } 310 case 2: 311 /* 312 * Scale down 16-colors to 4 colors. Default 4-color palette 313 * is grayscale. However, simply dividing the values by 4 314 * will not work, as colors 1, 2 and 3 will be scaled-down 315 * to zero rendering them invisible. So empirically convert 316 * colors to a sane 4-level grayscale. 317 */ 318 switch (color) { 319 case 0: 320 color = 0; /* black */ 321 break; 322 case 1 ... 6: 323 color = 2; /* white */ 324 break; 325 case 7 ... 8: 326 color = 1; /* gray */ 327 break; 328 default: 329 color = 3; /* intense white */ 330 break; 331 } 332 break; 333 case 3: 334 /* 335 * Last 8 entries of default 16-color palette is a more intense 336 * version of the first 8 (i.e., same chrominance, different 337 * luminance). 338 */ 339 color &= 7; 340 break; 341 } 342 343 344 return color; 345 } 346 347 static void fb_flashcursor(struct work_struct *work) 348 { 349 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 350 struct fb_info *info; 351 struct vc_data *vc = NULL; 352 int c; 353 int mode; 354 int ret; 355 356 /* FIXME: we should sort out the unbind locking instead */ 357 /* instead we just fail to flash the cursor if we can't get 358 * the lock instead of blocking fbcon deinit */ 359 ret = console_trylock(); 360 if (ret == 0) 361 return; 362 363 /* protected by console_lock */ 364 info = ops->info; 365 366 if (ops->currcon != -1) 367 vc = vc_cons[ops->currcon].d; 368 369 if (!vc || !con_is_visible(vc) || 370 fbcon_info_from_console(vc->vc_num) != info || 371 vc->vc_deccm != 1) { 372 console_unlock(); 373 return; 374 } 375 376 c = scr_readw((u16 *) vc->vc_pos); 377 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 378 CM_ERASE : CM_DRAW; 379 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 380 get_color(vc, info, c, 0)); 381 console_unlock(); 382 383 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 384 ops->cur_blink_jiffies); 385 } 386 387 static void fbcon_add_cursor_work(struct fb_info *info) 388 { 389 struct fbcon_ops *ops = info->fbcon_par; 390 391 if (!fbcon_cursor_noblink) 392 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 393 ops->cur_blink_jiffies); 394 } 395 396 static void fbcon_del_cursor_work(struct fb_info *info) 397 { 398 struct fbcon_ops *ops = info->fbcon_par; 399 400 cancel_delayed_work_sync(&ops->cursor_work); 401 } 402 403 #ifndef MODULE 404 static int __init fb_console_setup(char *this_opt) 405 { 406 char *options; 407 int i, j; 408 409 if (!this_opt || !*this_opt) 410 return 1; 411 412 while ((options = strsep(&this_opt, ",")) != NULL) { 413 if (!strncmp(options, "font:", 5)) { 414 strscpy(fontname, options + 5, sizeof(fontname)); 415 continue; 416 } 417 418 if (!strncmp(options, "scrollback:", 11)) { 419 pr_warn("Ignoring scrollback size option\n"); 420 continue; 421 } 422 423 if (!strncmp(options, "map:", 4)) { 424 options += 4; 425 if (*options) { 426 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 427 if (!options[j]) 428 j = 0; 429 con2fb_map_boot[i] = 430 (options[j++]-'0') % FB_MAX; 431 } 432 433 fbcon_map_override(); 434 } 435 continue; 436 } 437 438 if (!strncmp(options, "vc:", 3)) { 439 options += 3; 440 if (*options) 441 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 442 if (first_fb_vc >= MAX_NR_CONSOLES) 443 first_fb_vc = 0; 444 if (*options++ == '-') 445 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 446 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 447 last_fb_vc = MAX_NR_CONSOLES - 1; 448 fbcon_is_default = 0; 449 continue; 450 } 451 452 if (!strncmp(options, "rotate:", 7)) { 453 options += 7; 454 if (*options) 455 initial_rotation = simple_strtoul(options, &options, 0); 456 if (initial_rotation > 3) 457 initial_rotation = 0; 458 continue; 459 } 460 461 if (!strncmp(options, "margin:", 7)) { 462 options += 7; 463 if (*options) 464 margin_color = simple_strtoul(options, &options, 0); 465 continue; 466 } 467 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 468 if (!strcmp(options, "nodefer")) { 469 deferred_takeover = false; 470 continue; 471 } 472 #endif 473 474 if (!strncmp(options, "logo-pos:", 9)) { 475 options += 9; 476 if (!strcmp(options, "center")) 477 fb_center_logo = true; 478 continue; 479 } 480 481 if (!strncmp(options, "logo-count:", 11)) { 482 options += 11; 483 if (*options) 484 fb_logo_count = simple_strtol(options, &options, 0); 485 continue; 486 } 487 } 488 return 1; 489 } 490 491 __setup("fbcon=", fb_console_setup); 492 #endif 493 494 static int search_fb_in_map(int idx) 495 { 496 int i, retval = 0; 497 498 for (i = first_fb_vc; i <= last_fb_vc; i++) { 499 if (con2fb_map[i] == idx) 500 retval = 1; 501 } 502 return retval; 503 } 504 505 static int search_for_mapped_con(void) 506 { 507 int i, retval = 0; 508 509 for (i = first_fb_vc; i <= last_fb_vc; i++) { 510 if (con2fb_map[i] != -1) 511 retval = 1; 512 } 513 return retval; 514 } 515 516 static int do_fbcon_takeover(int show_logo) 517 { 518 int err, i; 519 520 if (!fbcon_num_registered_fb) 521 return -ENODEV; 522 523 if (!show_logo) 524 logo_shown = FBCON_LOGO_DONTSHOW; 525 526 for (i = first_fb_vc; i <= last_fb_vc; i++) 527 con2fb_map[i] = info_idx; 528 529 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 530 fbcon_is_default); 531 532 if (err) { 533 for (i = first_fb_vc; i <= last_fb_vc; i++) 534 con2fb_map[i] = -1; 535 info_idx = -1; 536 } else { 537 fbcon_has_console_bind = 1; 538 } 539 540 return err; 541 } 542 543 #ifdef MODULE 544 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 545 int cols, int rows, int new_cols, int new_rows) 546 { 547 logo_shown = FBCON_LOGO_DONTSHOW; 548 } 549 #else 550 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 551 int cols, int rows, int new_cols, int new_rows) 552 { 553 /* Need to make room for the logo */ 554 struct fbcon_ops *ops = info->fbcon_par; 555 int cnt, erase = vc->vc_video_erase_char, step; 556 unsigned short *save = NULL, *r, *q; 557 int logo_height; 558 559 if (info->fbops->owner) { 560 logo_shown = FBCON_LOGO_DONTSHOW; 561 return; 562 } 563 564 /* 565 * remove underline attribute from erase character 566 * if black and white framebuffer. 567 */ 568 if (fb_get_color_depth(&info->var, &info->fix) == 1) 569 erase &= ~0x400; 570 logo_height = fb_prepare_logo(info, ops->rotate); 571 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 572 q = (unsigned short *) (vc->vc_origin + 573 vc->vc_size_row * rows); 574 step = logo_lines * cols; 575 for (r = q - logo_lines * cols; r < q; r++) 576 if (scr_readw(r) != vc->vc_video_erase_char) 577 break; 578 if (r != q && new_rows >= rows + logo_lines) { 579 save = kzalloc(array3_size(logo_lines, new_cols, 2), 580 GFP_KERNEL); 581 if (save) { 582 int i = min(cols, new_cols); 583 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 584 r = q - step; 585 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 586 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 587 r = q; 588 } 589 } 590 if (r == q) { 591 /* We can scroll screen down */ 592 r = q - step - cols; 593 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 594 scr_memcpyw(r + step, r, vc->vc_size_row); 595 r -= cols; 596 } 597 if (!save) { 598 int lines; 599 if (vc->state.y + logo_lines >= rows) 600 lines = rows - vc->state.y - 1; 601 else 602 lines = logo_lines; 603 vc->state.y += lines; 604 vc->vc_pos += lines * vc->vc_size_row; 605 } 606 } 607 scr_memsetw((unsigned short *) vc->vc_origin, 608 erase, 609 vc->vc_size_row * logo_lines); 610 611 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 612 fbcon_clear_margins(vc, 0); 613 update_screen(vc); 614 } 615 616 if (save) { 617 q = (unsigned short *) (vc->vc_origin + 618 vc->vc_size_row * 619 rows); 620 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 621 vc->state.y += logo_lines; 622 vc->vc_pos += logo_lines * vc->vc_size_row; 623 kfree(save); 624 } 625 626 if (logo_shown == FBCON_LOGO_DONTSHOW) 627 return; 628 629 if (logo_lines > vc->vc_bottom) { 630 logo_shown = FBCON_LOGO_CANSHOW; 631 printk(KERN_INFO 632 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 633 } else { 634 logo_shown = FBCON_LOGO_DRAW; 635 vc->vc_top = logo_lines; 636 } 637 } 638 #endif /* MODULE */ 639 640 #ifdef CONFIG_FB_TILEBLITTING 641 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 642 { 643 struct fbcon_ops *ops = info->fbcon_par; 644 645 ops->p = &fb_display[vc->vc_num]; 646 647 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 648 fbcon_set_tileops(vc, info); 649 else { 650 fbcon_set_rotation(info); 651 fbcon_set_bitops(ops); 652 } 653 } 654 655 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 656 { 657 int err = 0; 658 659 if (info->flags & FBINFO_MISC_TILEBLITTING && 660 info->tileops->fb_get_tilemax(info) < charcount) 661 err = 1; 662 663 return err; 664 } 665 #else 666 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 667 { 668 struct fbcon_ops *ops = info->fbcon_par; 669 670 info->flags &= ~FBINFO_MISC_TILEBLITTING; 671 ops->p = &fb_display[vc->vc_num]; 672 fbcon_set_rotation(info); 673 fbcon_set_bitops(ops); 674 } 675 676 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 677 { 678 return 0; 679 } 680 681 #endif /* CONFIG_MISC_TILEBLITTING */ 682 683 static void fbcon_release(struct fb_info *info) 684 { 685 lock_fb_info(info); 686 if (info->fbops->fb_release) 687 info->fbops->fb_release(info, 0); 688 unlock_fb_info(info); 689 690 module_put(info->fbops->owner); 691 692 if (info->fbcon_par) { 693 struct fbcon_ops *ops = info->fbcon_par; 694 695 fbcon_del_cursor_work(info); 696 kfree(ops->cursor_state.mask); 697 kfree(ops->cursor_data); 698 kfree(ops->cursor_src); 699 kfree(ops->fontbuffer); 700 kfree(info->fbcon_par); 701 info->fbcon_par = NULL; 702 } 703 } 704 705 static int fbcon_open(struct fb_info *info) 706 { 707 struct fbcon_ops *ops; 708 709 if (!try_module_get(info->fbops->owner)) 710 return -ENODEV; 711 712 lock_fb_info(info); 713 if (info->fbops->fb_open && 714 info->fbops->fb_open(info, 0)) { 715 unlock_fb_info(info); 716 module_put(info->fbops->owner); 717 return -ENODEV; 718 } 719 unlock_fb_info(info); 720 721 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 722 if (!ops) { 723 fbcon_release(info); 724 return -ENOMEM; 725 } 726 727 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 728 ops->info = info; 729 info->fbcon_par = ops; 730 ops->cur_blink_jiffies = HZ / 5; 731 732 return 0; 733 } 734 735 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 736 int unit) 737 { 738 int err; 739 740 err = fbcon_open(info); 741 if (err) 742 return err; 743 744 if (vc) 745 set_blitting_type(vc, info); 746 747 return err; 748 } 749 750 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 751 struct fb_info *newinfo) 752 { 753 int ret; 754 755 fbcon_release(oldinfo); 756 757 /* 758 If oldinfo and newinfo are driving the same hardware, 759 the fb_release() method of oldinfo may attempt to 760 restore the hardware state. This will leave the 761 newinfo in an undefined state. Thus, a call to 762 fb_set_par() may be needed for the newinfo. 763 */ 764 if (newinfo && newinfo->fbops->fb_set_par) { 765 ret = newinfo->fbops->fb_set_par(newinfo); 766 767 if (ret) 768 printk(KERN_ERR "con2fb_release_oldinfo: " 769 "detected unhandled fb_set_par error, " 770 "error code %d\n", ret); 771 } 772 } 773 774 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 775 int unit, int show_logo) 776 { 777 struct fbcon_ops *ops = info->fbcon_par; 778 int ret; 779 780 ops->currcon = fg_console; 781 782 if (info->fbops->fb_set_par && !ops->initialized) { 783 ret = info->fbops->fb_set_par(info); 784 785 if (ret) 786 printk(KERN_ERR "con2fb_init_display: detected " 787 "unhandled fb_set_par error, " 788 "error code %d\n", ret); 789 } 790 791 ops->initialized = true; 792 ops->graphics = 0; 793 fbcon_set_disp(info, &info->var, unit); 794 795 if (show_logo) { 796 struct vc_data *fg_vc = vc_cons[fg_console].d; 797 struct fb_info *fg_info = 798 fbcon_info_from_console(fg_console); 799 800 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 801 fg_vc->vc_rows, fg_vc->vc_cols, 802 fg_vc->vc_rows); 803 } 804 805 update_screen(vc_cons[fg_console].d); 806 } 807 808 /** 809 * set_con2fb_map - map console to frame buffer device 810 * @unit: virtual console number to map 811 * @newidx: frame buffer index to map virtual console to 812 * @user: user request 813 * 814 * Maps a virtual console @unit to a frame buffer device 815 * @newidx. 816 * 817 * This should be called with the console lock held. 818 */ 819 static int set_con2fb_map(int unit, int newidx, int user) 820 { 821 struct vc_data *vc = vc_cons[unit].d; 822 int oldidx = con2fb_map[unit]; 823 struct fb_info *info = fbcon_registered_fb[newidx]; 824 struct fb_info *oldinfo = NULL; 825 int err = 0, show_logo; 826 827 WARN_CONSOLE_UNLOCKED(); 828 829 if (oldidx == newidx) 830 return 0; 831 832 if (!info) 833 return -EINVAL; 834 835 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 836 info_idx = newidx; 837 return do_fbcon_takeover(0); 838 } 839 840 if (oldidx != -1) 841 oldinfo = fbcon_registered_fb[oldidx]; 842 843 if (!search_fb_in_map(newidx)) { 844 err = con2fb_acquire_newinfo(vc, info, unit); 845 if (err) 846 return err; 847 848 fbcon_add_cursor_work(info); 849 } 850 851 con2fb_map[unit] = newidx; 852 853 /* 854 * If old fb is not mapped to any of the consoles, 855 * fbcon should release it. 856 */ 857 if (oldinfo && !search_fb_in_map(oldidx)) 858 con2fb_release_oldinfo(vc, oldinfo, info); 859 860 show_logo = (fg_console == 0 && !user && 861 logo_shown != FBCON_LOGO_DONTSHOW); 862 863 con2fb_map_boot[unit] = newidx; 864 con2fb_init_display(vc, info, unit, show_logo); 865 866 if (!search_fb_in_map(info_idx)) 867 info_idx = newidx; 868 869 return err; 870 } 871 872 /* 873 * Low Level Operations 874 */ 875 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 876 static int var_to_display(struct fbcon_display *disp, 877 struct fb_var_screeninfo *var, 878 struct fb_info *info) 879 { 880 disp->xres_virtual = var->xres_virtual; 881 disp->yres_virtual = var->yres_virtual; 882 disp->bits_per_pixel = var->bits_per_pixel; 883 disp->grayscale = var->grayscale; 884 disp->nonstd = var->nonstd; 885 disp->accel_flags = var->accel_flags; 886 disp->height = var->height; 887 disp->width = var->width; 888 disp->red = var->red; 889 disp->green = var->green; 890 disp->blue = var->blue; 891 disp->transp = var->transp; 892 disp->rotate = var->rotate; 893 disp->mode = fb_match_mode(var, &info->modelist); 894 if (disp->mode == NULL) 895 /* This should not happen */ 896 return -EINVAL; 897 return 0; 898 } 899 900 static void display_to_var(struct fb_var_screeninfo *var, 901 struct fbcon_display *disp) 902 { 903 fb_videomode_to_var(var, disp->mode); 904 var->xres_virtual = disp->xres_virtual; 905 var->yres_virtual = disp->yres_virtual; 906 var->bits_per_pixel = disp->bits_per_pixel; 907 var->grayscale = disp->grayscale; 908 var->nonstd = disp->nonstd; 909 var->accel_flags = disp->accel_flags; 910 var->height = disp->height; 911 var->width = disp->width; 912 var->red = disp->red; 913 var->green = disp->green; 914 var->blue = disp->blue; 915 var->transp = disp->transp; 916 var->rotate = disp->rotate; 917 } 918 919 static const char *fbcon_startup(void) 920 { 921 const char *display_desc = "frame buffer device"; 922 struct fbcon_display *p = &fb_display[fg_console]; 923 struct vc_data *vc = vc_cons[fg_console].d; 924 const struct font_desc *font = NULL; 925 struct fb_info *info = NULL; 926 struct fbcon_ops *ops; 927 int rows, cols; 928 929 /* 930 * If num_registered_fb is zero, this is a call for the dummy part. 931 * The frame buffer devices weren't initialized yet. 932 */ 933 if (!fbcon_num_registered_fb || info_idx == -1) 934 return display_desc; 935 /* 936 * Instead of blindly using registered_fb[0], we use info_idx, set by 937 * fbcon_fb_registered(); 938 */ 939 info = fbcon_registered_fb[info_idx]; 940 if (!info) 941 return NULL; 942 943 if (fbcon_open(info)) 944 return NULL; 945 946 ops = info->fbcon_par; 947 ops->currcon = -1; 948 ops->graphics = 1; 949 ops->cur_rotate = -1; 950 951 p->con_rotate = initial_rotation; 952 if (p->con_rotate == -1) 953 p->con_rotate = info->fbcon_rotate_hint; 954 if (p->con_rotate == -1) 955 p->con_rotate = FB_ROTATE_UR; 956 957 set_blitting_type(vc, info); 958 959 /* Setup default font */ 960 if (!p->fontdata) { 961 if (!fontname[0] || !(font = find_font(fontname))) 962 font = get_default_font(info->var.xres, 963 info->var.yres, 964 info->pixmap.blit_x, 965 info->pixmap.blit_y); 966 vc->vc_font.width = font->width; 967 vc->vc_font.height = font->height; 968 vc->vc_font.data = (void *)(p->fontdata = font->data); 969 vc->vc_font.charcount = font->charcount; 970 } 971 972 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 973 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 974 cols /= vc->vc_font.width; 975 rows /= vc->vc_font.height; 976 vc_resize(vc, cols, rows); 977 978 pr_debug("mode: %s\n", info->fix.id); 979 pr_debug("visual: %d\n", info->fix.visual); 980 pr_debug("res: %dx%d-%d\n", info->var.xres, 981 info->var.yres, 982 info->var.bits_per_pixel); 983 984 fbcon_add_cursor_work(info); 985 return display_desc; 986 } 987 988 static void fbcon_init(struct vc_data *vc, int init) 989 { 990 struct fb_info *info; 991 struct fbcon_ops *ops; 992 struct vc_data **default_mode = vc->vc_display_fg; 993 struct vc_data *svc = *default_mode; 994 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 995 int logo = 1, new_rows, new_cols, rows, cols; 996 int ret; 997 998 if (WARN_ON(info_idx == -1)) 999 return; 1000 1001 if (con2fb_map[vc->vc_num] == -1) 1002 con2fb_map[vc->vc_num] = info_idx; 1003 1004 info = fbcon_info_from_console(vc->vc_num); 1005 1006 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1007 logo_shown = FBCON_LOGO_DONTSHOW; 1008 1009 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1010 (info->fix.type == FB_TYPE_TEXT)) 1011 logo = 0; 1012 1013 if (var_to_display(p, &info->var, info)) 1014 return; 1015 1016 if (!info->fbcon_par) 1017 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1018 1019 /* If we are not the first console on this 1020 fb, copy the font from that console */ 1021 t = &fb_display[fg_console]; 1022 if (!p->fontdata) { 1023 if (t->fontdata) { 1024 struct vc_data *fvc = vc_cons[fg_console].d; 1025 1026 vc->vc_font.data = (void *)(p->fontdata = 1027 fvc->vc_font.data); 1028 vc->vc_font.width = fvc->vc_font.width; 1029 vc->vc_font.height = fvc->vc_font.height; 1030 vc->vc_font.charcount = fvc->vc_font.charcount; 1031 p->userfont = t->userfont; 1032 1033 if (p->userfont) 1034 REFCOUNT(p->fontdata)++; 1035 } else { 1036 const struct font_desc *font = NULL; 1037 1038 if (!fontname[0] || !(font = find_font(fontname))) 1039 font = get_default_font(info->var.xres, 1040 info->var.yres, 1041 info->pixmap.blit_x, 1042 info->pixmap.blit_y); 1043 vc->vc_font.width = font->width; 1044 vc->vc_font.height = font->height; 1045 vc->vc_font.data = (void *)(p->fontdata = font->data); 1046 vc->vc_font.charcount = font->charcount; 1047 } 1048 } 1049 1050 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1051 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1052 if (vc->vc_font.charcount == 256) { 1053 vc->vc_hi_font_mask = 0; 1054 } else { 1055 vc->vc_hi_font_mask = 0x100; 1056 if (vc->vc_can_do_color) 1057 vc->vc_complement_mask <<= 1; 1058 } 1059 1060 if (!*svc->uni_pagedict_loc) 1061 con_set_default_unimap(svc); 1062 if (!*vc->uni_pagedict_loc) 1063 con_copy_unimap(vc, svc); 1064 1065 ops = info->fbcon_par; 1066 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1067 1068 p->con_rotate = initial_rotation; 1069 if (p->con_rotate == -1) 1070 p->con_rotate = info->fbcon_rotate_hint; 1071 if (p->con_rotate == -1) 1072 p->con_rotate = FB_ROTATE_UR; 1073 1074 set_blitting_type(vc, info); 1075 1076 cols = vc->vc_cols; 1077 rows = vc->vc_rows; 1078 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1079 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1080 new_cols /= vc->vc_font.width; 1081 new_rows /= vc->vc_font.height; 1082 1083 /* 1084 * We must always set the mode. The mode of the previous console 1085 * driver could be in the same resolution but we are using different 1086 * hardware so we have to initialize the hardware. 1087 * 1088 * We need to do it in fbcon_init() to prevent screen corruption. 1089 */ 1090 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1091 if (info->fbops->fb_set_par && !ops->initialized) { 1092 ret = info->fbops->fb_set_par(info); 1093 1094 if (ret) 1095 printk(KERN_ERR "fbcon_init: detected " 1096 "unhandled fb_set_par error, " 1097 "error code %d\n", ret); 1098 } 1099 1100 ops->initialized = true; 1101 } 1102 1103 ops->graphics = 0; 1104 1105 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1106 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1107 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1108 p->scrollmode = SCROLL_MOVE; 1109 else /* default to something safe */ 1110 p->scrollmode = SCROLL_REDRAW; 1111 #endif 1112 1113 /* 1114 * ++guenther: console.c:vc_allocate() relies on initializing 1115 * vc_{cols,rows}, but we must not set those if we are only 1116 * resizing the console. 1117 */ 1118 if (init) { 1119 vc->vc_cols = new_cols; 1120 vc->vc_rows = new_rows; 1121 } else 1122 vc_resize(vc, new_cols, new_rows); 1123 1124 if (logo) 1125 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1126 1127 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1128 ops->rotate = FB_ROTATE_UR; 1129 set_blitting_type(vc, info); 1130 } 1131 1132 ops->p = &fb_display[fg_console]; 1133 } 1134 1135 static void fbcon_free_font(struct fbcon_display *p) 1136 { 1137 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1138 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1139 p->fontdata = NULL; 1140 p->userfont = 0; 1141 } 1142 1143 static void set_vc_hi_font(struct vc_data *vc, bool set); 1144 1145 static void fbcon_release_all(void) 1146 { 1147 struct fb_info *info; 1148 int i, j, mapped; 1149 1150 fbcon_for_each_registered_fb(i) { 1151 mapped = 0; 1152 info = fbcon_registered_fb[i]; 1153 1154 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1155 if (con2fb_map[j] == i) { 1156 mapped = 1; 1157 con2fb_map[j] = -1; 1158 } 1159 } 1160 1161 if (mapped) 1162 fbcon_release(info); 1163 } 1164 } 1165 1166 static void fbcon_deinit(struct vc_data *vc) 1167 { 1168 struct fbcon_display *p = &fb_display[vc->vc_num]; 1169 struct fb_info *info; 1170 struct fbcon_ops *ops; 1171 int idx; 1172 1173 fbcon_free_font(p); 1174 idx = con2fb_map[vc->vc_num]; 1175 1176 if (idx == -1) 1177 goto finished; 1178 1179 info = fbcon_registered_fb[idx]; 1180 1181 if (!info) 1182 goto finished; 1183 1184 ops = info->fbcon_par; 1185 1186 if (!ops) 1187 goto finished; 1188 1189 if (con_is_visible(vc)) 1190 fbcon_del_cursor_work(info); 1191 1192 ops->initialized = false; 1193 finished: 1194 1195 fbcon_free_font(p); 1196 vc->vc_font.data = NULL; 1197 1198 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1199 set_vc_hi_font(vc, false); 1200 1201 if (!con_is_bound(&fb_con)) 1202 fbcon_release_all(); 1203 1204 if (vc->vc_num == logo_shown) 1205 logo_shown = FBCON_LOGO_CANSHOW; 1206 1207 return; 1208 } 1209 1210 /* ====================================================================== */ 1211 1212 /* fbcon_XXX routines - interface used by the world 1213 * 1214 * This system is now divided into two levels because of complications 1215 * caused by hardware scrolling. Top level functions: 1216 * 1217 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1218 * 1219 * handles y values in range [0, scr_height-1] that correspond to real 1220 * screen positions. y_wrap shift means that first line of bitmap may be 1221 * anywhere on this display. These functions convert lineoffsets to 1222 * bitmap offsets and deal with the wrap-around case by splitting blits. 1223 * 1224 * fbcon_bmove_physical_8() -- These functions fast implementations 1225 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1226 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1227 * 1228 * WARNING: 1229 * 1230 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1231 * Implies should only really hardware scroll in rows. Only reason for 1232 * restriction is simplicity & efficiency at the moment. 1233 */ 1234 1235 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1236 int width) 1237 { 1238 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1239 struct fbcon_ops *ops = info->fbcon_par; 1240 1241 struct fbcon_display *p = &fb_display[vc->vc_num]; 1242 u_int y_break; 1243 1244 if (fbcon_is_inactive(vc, info)) 1245 return; 1246 1247 if (!height || !width) 1248 return; 1249 1250 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1251 vc->vc_top = 0; 1252 /* 1253 * If the font dimensions are not an integral of the display 1254 * dimensions then the ops->clear below won't end up clearing 1255 * the margins. Call clear_margins here in case the logo 1256 * bitmap stretched into the margin area. 1257 */ 1258 fbcon_clear_margins(vc, 0); 1259 } 1260 1261 /* Split blits that cross physical y_wrap boundary */ 1262 1263 y_break = p->vrows - p->yscroll; 1264 if (sy < y_break && sy + height - 1 >= y_break) { 1265 u_int b = y_break - sy; 1266 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1267 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1268 width); 1269 } else 1270 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1271 } 1272 1273 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1274 int count, int ypos, int xpos) 1275 { 1276 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1277 struct fbcon_display *p = &fb_display[vc->vc_num]; 1278 struct fbcon_ops *ops = info->fbcon_par; 1279 1280 if (!fbcon_is_inactive(vc, info)) 1281 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1282 get_color(vc, info, scr_readw(s), 1), 1283 get_color(vc, info, scr_readw(s), 0)); 1284 } 1285 1286 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1287 { 1288 unsigned short chr; 1289 1290 scr_writew(c, &chr); 1291 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1292 } 1293 1294 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1295 { 1296 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1297 struct fbcon_ops *ops = info->fbcon_par; 1298 1299 if (!fbcon_is_inactive(vc, info)) 1300 ops->clear_margins(vc, info, margin_color, bottom_only); 1301 } 1302 1303 static void fbcon_cursor(struct vc_data *vc, int mode) 1304 { 1305 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1306 struct fbcon_ops *ops = info->fbcon_par; 1307 int c = scr_readw((u16 *) vc->vc_pos); 1308 1309 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1310 1311 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1312 return; 1313 1314 if (vc->vc_cursor_type & CUR_SW) 1315 fbcon_del_cursor_work(info); 1316 else 1317 fbcon_add_cursor_work(info); 1318 1319 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1320 1321 if (!ops->cursor) 1322 return; 1323 1324 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1325 get_color(vc, info, c, 0)); 1326 } 1327 1328 static int scrollback_phys_max = 0; 1329 static int scrollback_max = 0; 1330 static int scrollback_current = 0; 1331 1332 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1333 int unit) 1334 { 1335 struct fbcon_display *p, *t; 1336 struct vc_data **default_mode, *vc; 1337 struct vc_data *svc; 1338 struct fbcon_ops *ops = info->fbcon_par; 1339 int rows, cols; 1340 1341 p = &fb_display[unit]; 1342 1343 if (var_to_display(p, var, info)) 1344 return; 1345 1346 vc = vc_cons[unit].d; 1347 1348 if (!vc) 1349 return; 1350 1351 default_mode = vc->vc_display_fg; 1352 svc = *default_mode; 1353 t = &fb_display[svc->vc_num]; 1354 1355 if (!vc->vc_font.data) { 1356 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1357 vc->vc_font.width = (*default_mode)->vc_font.width; 1358 vc->vc_font.height = (*default_mode)->vc_font.height; 1359 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1360 p->userfont = t->userfont; 1361 if (p->userfont) 1362 REFCOUNT(p->fontdata)++; 1363 } 1364 1365 var->activate = FB_ACTIVATE_NOW; 1366 info->var.activate = var->activate; 1367 var->yoffset = info->var.yoffset; 1368 var->xoffset = info->var.xoffset; 1369 fb_set_var(info, var); 1370 ops->var = info->var; 1371 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1372 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1373 if (vc->vc_font.charcount == 256) { 1374 vc->vc_hi_font_mask = 0; 1375 } else { 1376 vc->vc_hi_font_mask = 0x100; 1377 if (vc->vc_can_do_color) 1378 vc->vc_complement_mask <<= 1; 1379 } 1380 1381 if (!*svc->uni_pagedict_loc) 1382 con_set_default_unimap(svc); 1383 if (!*vc->uni_pagedict_loc) 1384 con_copy_unimap(vc, svc); 1385 1386 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1387 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1388 cols /= vc->vc_font.width; 1389 rows /= vc->vc_font.height; 1390 vc_resize(vc, cols, rows); 1391 1392 if (con_is_visible(vc)) { 1393 update_screen(vc); 1394 } 1395 } 1396 1397 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1398 { 1399 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1400 struct fbcon_ops *ops = info->fbcon_par; 1401 struct fbcon_display *p = &fb_display[vc->vc_num]; 1402 1403 p->yscroll += count; 1404 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1405 p->yscroll -= p->vrows; 1406 ops->var.xoffset = 0; 1407 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1408 ops->var.vmode |= FB_VMODE_YWRAP; 1409 ops->update_start(info); 1410 scrollback_max += count; 1411 if (scrollback_max > scrollback_phys_max) 1412 scrollback_max = scrollback_phys_max; 1413 scrollback_current = 0; 1414 } 1415 1416 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1417 { 1418 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1419 struct fbcon_ops *ops = info->fbcon_par; 1420 struct fbcon_display *p = &fb_display[vc->vc_num]; 1421 1422 p->yscroll -= count; 1423 if (p->yscroll < 0) /* Deal with wrap */ 1424 p->yscroll += p->vrows; 1425 ops->var.xoffset = 0; 1426 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1427 ops->var.vmode |= FB_VMODE_YWRAP; 1428 ops->update_start(info); 1429 scrollback_max -= count; 1430 if (scrollback_max < 0) 1431 scrollback_max = 0; 1432 scrollback_current = 0; 1433 } 1434 1435 static __inline__ void ypan_up(struct vc_data *vc, int count) 1436 { 1437 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1438 struct fbcon_display *p = &fb_display[vc->vc_num]; 1439 struct fbcon_ops *ops = info->fbcon_par; 1440 1441 p->yscroll += count; 1442 if (p->yscroll > p->vrows - vc->vc_rows) { 1443 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1444 0, 0, 0, vc->vc_rows, vc->vc_cols); 1445 p->yscroll -= p->vrows - vc->vc_rows; 1446 } 1447 1448 ops->var.xoffset = 0; 1449 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1450 ops->var.vmode &= ~FB_VMODE_YWRAP; 1451 ops->update_start(info); 1452 fbcon_clear_margins(vc, 1); 1453 scrollback_max += count; 1454 if (scrollback_max > scrollback_phys_max) 1455 scrollback_max = scrollback_phys_max; 1456 scrollback_current = 0; 1457 } 1458 1459 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1460 { 1461 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1462 struct fbcon_ops *ops = info->fbcon_par; 1463 struct fbcon_display *p = &fb_display[vc->vc_num]; 1464 1465 p->yscroll += count; 1466 1467 if (p->yscroll > p->vrows - vc->vc_rows) { 1468 p->yscroll -= p->vrows - vc->vc_rows; 1469 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1470 } 1471 1472 ops->var.xoffset = 0; 1473 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1474 ops->var.vmode &= ~FB_VMODE_YWRAP; 1475 ops->update_start(info); 1476 fbcon_clear_margins(vc, 1); 1477 scrollback_max += count; 1478 if (scrollback_max > scrollback_phys_max) 1479 scrollback_max = scrollback_phys_max; 1480 scrollback_current = 0; 1481 } 1482 1483 static __inline__ void ypan_down(struct vc_data *vc, int count) 1484 { 1485 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1486 struct fbcon_display *p = &fb_display[vc->vc_num]; 1487 struct fbcon_ops *ops = info->fbcon_par; 1488 1489 p->yscroll -= count; 1490 if (p->yscroll < 0) { 1491 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1492 0, vc->vc_rows, vc->vc_cols); 1493 p->yscroll += p->vrows - vc->vc_rows; 1494 } 1495 1496 ops->var.xoffset = 0; 1497 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1498 ops->var.vmode &= ~FB_VMODE_YWRAP; 1499 ops->update_start(info); 1500 fbcon_clear_margins(vc, 1); 1501 scrollback_max -= count; 1502 if (scrollback_max < 0) 1503 scrollback_max = 0; 1504 scrollback_current = 0; 1505 } 1506 1507 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1508 { 1509 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1510 struct fbcon_ops *ops = info->fbcon_par; 1511 struct fbcon_display *p = &fb_display[vc->vc_num]; 1512 1513 p->yscroll -= count; 1514 1515 if (p->yscroll < 0) { 1516 p->yscroll += p->vrows - vc->vc_rows; 1517 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1518 } 1519 1520 ops->var.xoffset = 0; 1521 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1522 ops->var.vmode &= ~FB_VMODE_YWRAP; 1523 ops->update_start(info); 1524 fbcon_clear_margins(vc, 1); 1525 scrollback_max -= count; 1526 if (scrollback_max < 0) 1527 scrollback_max = 0; 1528 scrollback_current = 0; 1529 } 1530 1531 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1532 int line, int count, int dy) 1533 { 1534 unsigned short *s = (unsigned short *) 1535 (vc->vc_origin + vc->vc_size_row * line); 1536 1537 while (count--) { 1538 unsigned short *start = s; 1539 unsigned short *le = advance_row(s, 1); 1540 unsigned short c; 1541 int x = 0; 1542 unsigned short attr = 1; 1543 1544 do { 1545 c = scr_readw(s); 1546 if (attr != (c & 0xff00)) { 1547 attr = c & 0xff00; 1548 if (s > start) { 1549 fbcon_putcs(vc, start, s - start, 1550 dy, x); 1551 x += s - start; 1552 start = s; 1553 } 1554 } 1555 console_conditional_schedule(); 1556 s++; 1557 } while (s < le); 1558 if (s > start) 1559 fbcon_putcs(vc, start, s - start, dy, x); 1560 console_conditional_schedule(); 1561 dy++; 1562 } 1563 } 1564 1565 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1566 struct fbcon_display *p, int line, int count, int ycount) 1567 { 1568 int offset = ycount * vc->vc_cols; 1569 unsigned short *d = (unsigned short *) 1570 (vc->vc_origin + vc->vc_size_row * line); 1571 unsigned short *s = d + offset; 1572 struct fbcon_ops *ops = info->fbcon_par; 1573 1574 while (count--) { 1575 unsigned short *start = s; 1576 unsigned short *le = advance_row(s, 1); 1577 unsigned short c; 1578 int x = 0; 1579 1580 do { 1581 c = scr_readw(s); 1582 1583 if (c == scr_readw(d)) { 1584 if (s > start) { 1585 ops->bmove(vc, info, line + ycount, x, 1586 line, x, 1, s-start); 1587 x += s - start + 1; 1588 start = s + 1; 1589 } else { 1590 x++; 1591 start++; 1592 } 1593 } 1594 1595 scr_writew(c, d); 1596 console_conditional_schedule(); 1597 s++; 1598 d++; 1599 } while (s < le); 1600 if (s > start) 1601 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1602 s-start); 1603 console_conditional_schedule(); 1604 if (ycount > 0) 1605 line++; 1606 else { 1607 line--; 1608 /* NOTE: We subtract two lines from these pointers */ 1609 s -= vc->vc_size_row; 1610 d -= vc->vc_size_row; 1611 } 1612 } 1613 } 1614 1615 static void fbcon_redraw(struct vc_data *vc, int line, int count, int offset) 1616 { 1617 unsigned short *d = (unsigned short *) 1618 (vc->vc_origin + vc->vc_size_row * line); 1619 unsigned short *s = d + offset; 1620 1621 while (count--) { 1622 unsigned short *start = s; 1623 unsigned short *le = advance_row(s, 1); 1624 unsigned short c; 1625 int x = 0; 1626 unsigned short attr = 1; 1627 1628 do { 1629 c = scr_readw(s); 1630 if (attr != (c & 0xff00)) { 1631 attr = c & 0xff00; 1632 if (s > start) { 1633 fbcon_putcs(vc, start, s - start, 1634 line, x); 1635 x += s - start; 1636 start = s; 1637 } 1638 } 1639 if (c == scr_readw(d)) { 1640 if (s > start) { 1641 fbcon_putcs(vc, start, s - start, 1642 line, x); 1643 x += s - start + 1; 1644 start = s + 1; 1645 } else { 1646 x++; 1647 start++; 1648 } 1649 } 1650 scr_writew(c, d); 1651 console_conditional_schedule(); 1652 s++; 1653 d++; 1654 } while (s < le); 1655 if (s > start) 1656 fbcon_putcs(vc, start, s - start, line, x); 1657 console_conditional_schedule(); 1658 if (offset > 0) 1659 line++; 1660 else { 1661 line--; 1662 /* NOTE: We subtract two lines from these pointers */ 1663 s -= vc->vc_size_row; 1664 d -= vc->vc_size_row; 1665 } 1666 } 1667 } 1668 1669 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1670 int dy, int dx, int height, int width, u_int y_break) 1671 { 1672 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1673 struct fbcon_ops *ops = info->fbcon_par; 1674 u_int b; 1675 1676 if (sy < y_break && sy + height > y_break) { 1677 b = y_break - sy; 1678 if (dy < sy) { /* Avoid trashing self */ 1679 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1680 y_break); 1681 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1682 height - b, width, y_break); 1683 } else { 1684 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1685 height - b, width, y_break); 1686 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1687 y_break); 1688 } 1689 return; 1690 } 1691 1692 if (dy < y_break && dy + height > y_break) { 1693 b = y_break - dy; 1694 if (dy < sy) { /* Avoid trashing self */ 1695 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1696 y_break); 1697 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1698 height - b, width, y_break); 1699 } else { 1700 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1701 height - b, width, y_break); 1702 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1703 y_break); 1704 } 1705 return; 1706 } 1707 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1708 height, width); 1709 } 1710 1711 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1712 int height, int width) 1713 { 1714 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1715 struct fbcon_display *p = &fb_display[vc->vc_num]; 1716 1717 if (fbcon_is_inactive(vc, info)) 1718 return; 1719 1720 if (!width || !height) 1721 return; 1722 1723 /* Split blits that cross physical y_wrap case. 1724 * Pathological case involves 4 blits, better to use recursive 1725 * code rather than unrolled case 1726 * 1727 * Recursive invocations don't need to erase the cursor over and 1728 * over again, so we use fbcon_bmove_rec() 1729 */ 1730 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1731 p->vrows - p->yscroll); 1732 } 1733 1734 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1735 enum con_scroll dir, unsigned int count) 1736 { 1737 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1738 struct fbcon_display *p = &fb_display[vc->vc_num]; 1739 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1740 1741 if (fbcon_is_inactive(vc, info)) 1742 return true; 1743 1744 fbcon_cursor(vc, CM_ERASE); 1745 1746 /* 1747 * ++Geert: Only use ywrap/ypan if the console is in text mode 1748 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1749 * whole screen (prevents flicker). 1750 */ 1751 1752 switch (dir) { 1753 case SM_UP: 1754 if (count > vc->vc_rows) /* Maximum realistic size */ 1755 count = vc->vc_rows; 1756 switch (fb_scrollmode(p)) { 1757 case SCROLL_MOVE: 1758 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1759 count); 1760 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1761 scr_memsetw((unsigned short *) (vc->vc_origin + 1762 vc->vc_size_row * 1763 (b - count)), 1764 vc->vc_video_erase_char, 1765 vc->vc_size_row * count); 1766 return true; 1767 1768 case SCROLL_WRAP_MOVE: 1769 if (b - t - count > 3 * vc->vc_rows >> 2) { 1770 if (t > 0) 1771 fbcon_bmove(vc, 0, 0, count, 0, t, 1772 vc->vc_cols); 1773 ywrap_up(vc, count); 1774 if (vc->vc_rows - b > 0) 1775 fbcon_bmove(vc, b - count, 0, b, 0, 1776 vc->vc_rows - b, 1777 vc->vc_cols); 1778 } else if (info->flags & FBINFO_READS_FAST) 1779 fbcon_bmove(vc, t + count, 0, t, 0, 1780 b - t - count, vc->vc_cols); 1781 else 1782 goto redraw_up; 1783 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1784 break; 1785 1786 case SCROLL_PAN_REDRAW: 1787 if ((p->yscroll + count <= 1788 2 * (p->vrows - vc->vc_rows)) 1789 && ((!scroll_partial && (b - t == vc->vc_rows)) 1790 || (scroll_partial 1791 && (b - t - count > 1792 3 * vc->vc_rows >> 2)))) { 1793 if (t > 0) 1794 fbcon_redraw_move(vc, p, 0, t, count); 1795 ypan_up_redraw(vc, t, count); 1796 if (vc->vc_rows - b > 0) 1797 fbcon_redraw_move(vc, p, b, 1798 vc->vc_rows - b, b); 1799 } else 1800 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1801 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1802 break; 1803 1804 case SCROLL_PAN_MOVE: 1805 if ((p->yscroll + count <= 1806 2 * (p->vrows - vc->vc_rows)) 1807 && ((!scroll_partial && (b - t == vc->vc_rows)) 1808 || (scroll_partial 1809 && (b - t - count > 1810 3 * vc->vc_rows >> 2)))) { 1811 if (t > 0) 1812 fbcon_bmove(vc, 0, 0, count, 0, t, 1813 vc->vc_cols); 1814 ypan_up(vc, count); 1815 if (vc->vc_rows - b > 0) 1816 fbcon_bmove(vc, b - count, 0, b, 0, 1817 vc->vc_rows - b, 1818 vc->vc_cols); 1819 } else if (info->flags & FBINFO_READS_FAST) 1820 fbcon_bmove(vc, t + count, 0, t, 0, 1821 b - t - count, vc->vc_cols); 1822 else 1823 goto redraw_up; 1824 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1825 break; 1826 1827 case SCROLL_REDRAW: 1828 redraw_up: 1829 fbcon_redraw(vc, t, b - t - count, 1830 count * vc->vc_cols); 1831 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1832 scr_memsetw((unsigned short *) (vc->vc_origin + 1833 vc->vc_size_row * 1834 (b - count)), 1835 vc->vc_video_erase_char, 1836 vc->vc_size_row * count); 1837 return true; 1838 } 1839 break; 1840 1841 case SM_DOWN: 1842 if (count > vc->vc_rows) /* Maximum realistic size */ 1843 count = vc->vc_rows; 1844 switch (fb_scrollmode(p)) { 1845 case SCROLL_MOVE: 1846 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1847 -count); 1848 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1849 scr_memsetw((unsigned short *) (vc->vc_origin + 1850 vc->vc_size_row * 1851 t), 1852 vc->vc_video_erase_char, 1853 vc->vc_size_row * count); 1854 return true; 1855 1856 case SCROLL_WRAP_MOVE: 1857 if (b - t - count > 3 * vc->vc_rows >> 2) { 1858 if (vc->vc_rows - b > 0) 1859 fbcon_bmove(vc, b, 0, b - count, 0, 1860 vc->vc_rows - b, 1861 vc->vc_cols); 1862 ywrap_down(vc, count); 1863 if (t > 0) 1864 fbcon_bmove(vc, count, 0, 0, 0, t, 1865 vc->vc_cols); 1866 } else if (info->flags & FBINFO_READS_FAST) 1867 fbcon_bmove(vc, t, 0, t + count, 0, 1868 b - t - count, vc->vc_cols); 1869 else 1870 goto redraw_down; 1871 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1872 break; 1873 1874 case SCROLL_PAN_MOVE: 1875 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1876 && ((!scroll_partial && (b - t == vc->vc_rows)) 1877 || (scroll_partial 1878 && (b - t - count > 1879 3 * vc->vc_rows >> 2)))) { 1880 if (vc->vc_rows - b > 0) 1881 fbcon_bmove(vc, b, 0, b - count, 0, 1882 vc->vc_rows - b, 1883 vc->vc_cols); 1884 ypan_down(vc, count); 1885 if (t > 0) 1886 fbcon_bmove(vc, count, 0, 0, 0, t, 1887 vc->vc_cols); 1888 } else if (info->flags & FBINFO_READS_FAST) 1889 fbcon_bmove(vc, t, 0, t + count, 0, 1890 b - t - count, vc->vc_cols); 1891 else 1892 goto redraw_down; 1893 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1894 break; 1895 1896 case SCROLL_PAN_REDRAW: 1897 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1898 && ((!scroll_partial && (b - t == vc->vc_rows)) 1899 || (scroll_partial 1900 && (b - t - count > 1901 3 * vc->vc_rows >> 2)))) { 1902 if (vc->vc_rows - b > 0) 1903 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1904 b - count); 1905 ypan_down_redraw(vc, t, count); 1906 if (t > 0) 1907 fbcon_redraw_move(vc, p, count, t, 0); 1908 } else 1909 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1910 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1911 break; 1912 1913 case SCROLL_REDRAW: 1914 redraw_down: 1915 fbcon_redraw(vc, b - 1, b - t - count, 1916 -count * vc->vc_cols); 1917 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1918 scr_memsetw((unsigned short *) (vc->vc_origin + 1919 vc->vc_size_row * 1920 t), 1921 vc->vc_video_erase_char, 1922 vc->vc_size_row * count); 1923 return true; 1924 } 1925 } 1926 return false; 1927 } 1928 1929 1930 static void updatescrollmode_accel(struct fbcon_display *p, 1931 struct fb_info *info, 1932 struct vc_data *vc) 1933 { 1934 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1935 struct fbcon_ops *ops = info->fbcon_par; 1936 int cap = info->flags; 1937 u16 t = 0; 1938 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1939 info->fix.xpanstep); 1940 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1941 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1942 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1943 info->var.xres_virtual); 1944 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1945 divides(ypan, vc->vc_font.height) && vyres > yres; 1946 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1947 divides(ywrap, vc->vc_font.height) && 1948 divides(vc->vc_font.height, vyres) && 1949 divides(vc->vc_font.height, yres); 1950 int reading_fast = cap & FBINFO_READS_FAST; 1951 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1952 !(cap & FBINFO_HWACCEL_DISABLED); 1953 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1954 !(cap & FBINFO_HWACCEL_DISABLED); 1955 1956 if (good_wrap || good_pan) { 1957 if (reading_fast || fast_copyarea) 1958 p->scrollmode = good_wrap ? 1959 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1960 else 1961 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1962 SCROLL_PAN_REDRAW; 1963 } else { 1964 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1965 p->scrollmode = SCROLL_MOVE; 1966 else 1967 p->scrollmode = SCROLL_REDRAW; 1968 } 1969 #endif 1970 } 1971 1972 static void updatescrollmode(struct fbcon_display *p, 1973 struct fb_info *info, 1974 struct vc_data *vc) 1975 { 1976 struct fbcon_ops *ops = info->fbcon_par; 1977 int fh = vc->vc_font.height; 1978 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1979 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1980 info->var.xres_virtual); 1981 1982 p->vrows = vyres/fh; 1983 if (yres > (fh * (vc->vc_rows + 1))) 1984 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1985 if ((yres % fh) && (vyres % fh < yres % fh)) 1986 p->vrows--; 1987 1988 /* update scrollmode in case hardware acceleration is used */ 1989 updatescrollmode_accel(p, info, vc); 1990 } 1991 1992 #define PITCH(w) (((w) + 7) >> 3) 1993 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1994 1995 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1996 unsigned int height, unsigned int user) 1997 { 1998 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1999 struct fbcon_ops *ops = info->fbcon_par; 2000 struct fbcon_display *p = &fb_display[vc->vc_num]; 2001 struct fb_var_screeninfo var = info->var; 2002 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2003 2004 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2005 int size; 2006 int pitch = PITCH(vc->vc_font.width); 2007 2008 /* 2009 * If user font, ensure that a possible change to user font 2010 * height or width will not allow a font data out-of-bounds access. 2011 * NOTE: must use original charcount in calculation as font 2012 * charcount can change and cannot be used to determine the 2013 * font data allocated size. 2014 */ 2015 if (pitch <= 0) 2016 return -EINVAL; 2017 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2018 if (size > FNTSIZE(vc->vc_font.data)) 2019 return -EINVAL; 2020 } 2021 2022 virt_w = FBCON_SWAP(ops->rotate, width, height); 2023 virt_h = FBCON_SWAP(ops->rotate, height, width); 2024 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2025 vc->vc_font.height); 2026 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2027 vc->vc_font.width); 2028 var.xres = virt_w * virt_fw; 2029 var.yres = virt_h * virt_fh; 2030 x_diff = info->var.xres - var.xres; 2031 y_diff = info->var.yres - var.yres; 2032 if (x_diff < 0 || x_diff > virt_fw || 2033 y_diff < 0 || y_diff > virt_fh) { 2034 const struct fb_videomode *mode; 2035 2036 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2037 mode = fb_find_best_mode(&var, &info->modelist); 2038 if (mode == NULL) 2039 return -EINVAL; 2040 display_to_var(&var, p); 2041 fb_videomode_to_var(&var, mode); 2042 2043 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2044 return -EINVAL; 2045 2046 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2047 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2048 var.activate = FB_ACTIVATE_NOW | 2049 FB_ACTIVATE_FORCE; 2050 fb_set_var(info, &var); 2051 } 2052 var_to_display(p, &info->var, info); 2053 ops->var = info->var; 2054 } 2055 updatescrollmode(p, info, vc); 2056 return 0; 2057 } 2058 2059 static int fbcon_switch(struct vc_data *vc) 2060 { 2061 struct fb_info *info, *old_info = NULL; 2062 struct fbcon_ops *ops; 2063 struct fbcon_display *p = &fb_display[vc->vc_num]; 2064 struct fb_var_screeninfo var; 2065 int i, ret, prev_console; 2066 2067 info = fbcon_info_from_console(vc->vc_num); 2068 ops = info->fbcon_par; 2069 2070 if (logo_shown >= 0) { 2071 struct vc_data *conp2 = vc_cons[logo_shown].d; 2072 2073 if (conp2->vc_top == logo_lines 2074 && conp2->vc_bottom == conp2->vc_rows) 2075 conp2->vc_top = 0; 2076 logo_shown = FBCON_LOGO_CANSHOW; 2077 } 2078 2079 prev_console = ops->currcon; 2080 if (prev_console != -1) 2081 old_info = fbcon_info_from_console(prev_console); 2082 /* 2083 * FIXME: If we have multiple fbdev's loaded, we need to 2084 * update all info->currcon. Perhaps, we can place this 2085 * in a centralized structure, but this might break some 2086 * drivers. 2087 * 2088 * info->currcon = vc->vc_num; 2089 */ 2090 fbcon_for_each_registered_fb(i) { 2091 if (fbcon_registered_fb[i]->fbcon_par) { 2092 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2093 2094 o->currcon = vc->vc_num; 2095 } 2096 } 2097 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2098 display_to_var(&var, p); 2099 var.activate = FB_ACTIVATE_NOW; 2100 2101 /* 2102 * make sure we don't unnecessarily trip the memcmp() 2103 * in fb_set_var() 2104 */ 2105 info->var.activate = var.activate; 2106 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2107 fb_set_var(info, &var); 2108 ops->var = info->var; 2109 2110 if (old_info != NULL && (old_info != info || 2111 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2112 if (info->fbops->fb_set_par) { 2113 ret = info->fbops->fb_set_par(info); 2114 2115 if (ret) 2116 printk(KERN_ERR "fbcon_switch: detected " 2117 "unhandled fb_set_par error, " 2118 "error code %d\n", ret); 2119 } 2120 2121 if (old_info != info) 2122 fbcon_del_cursor_work(old_info); 2123 } 2124 2125 if (fbcon_is_inactive(vc, info) || 2126 ops->blank_state != FB_BLANK_UNBLANK) 2127 fbcon_del_cursor_work(info); 2128 else 2129 fbcon_add_cursor_work(info); 2130 2131 set_blitting_type(vc, info); 2132 ops->cursor_reset = 1; 2133 2134 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2135 ops->rotate = FB_ROTATE_UR; 2136 set_blitting_type(vc, info); 2137 } 2138 2139 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2140 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2141 2142 if (vc->vc_font.charcount > 256) 2143 vc->vc_complement_mask <<= 1; 2144 2145 updatescrollmode(p, info, vc); 2146 2147 switch (fb_scrollmode(p)) { 2148 case SCROLL_WRAP_MOVE: 2149 scrollback_phys_max = p->vrows - vc->vc_rows; 2150 break; 2151 case SCROLL_PAN_MOVE: 2152 case SCROLL_PAN_REDRAW: 2153 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2154 if (scrollback_phys_max < 0) 2155 scrollback_phys_max = 0; 2156 break; 2157 default: 2158 scrollback_phys_max = 0; 2159 break; 2160 } 2161 2162 scrollback_max = 0; 2163 scrollback_current = 0; 2164 2165 if (!fbcon_is_inactive(vc, info)) { 2166 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2167 ops->update_start(info); 2168 } 2169 2170 fbcon_set_palette(vc, color_table); 2171 fbcon_clear_margins(vc, 0); 2172 2173 if (logo_shown == FBCON_LOGO_DRAW) { 2174 2175 logo_shown = fg_console; 2176 fb_show_logo(info, ops->rotate); 2177 update_region(vc, 2178 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2179 vc->vc_size_row * (vc->vc_bottom - 2180 vc->vc_top) / 2); 2181 return 0; 2182 } 2183 return 1; 2184 } 2185 2186 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2187 int blank) 2188 { 2189 if (blank) { 2190 unsigned short charmask = vc->vc_hi_font_mask ? 2191 0x1ff : 0xff; 2192 unsigned short oldc; 2193 2194 oldc = vc->vc_video_erase_char; 2195 vc->vc_video_erase_char &= charmask; 2196 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2197 vc->vc_video_erase_char = oldc; 2198 } 2199 } 2200 2201 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2202 { 2203 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2204 struct fbcon_ops *ops = info->fbcon_par; 2205 2206 if (mode_switch) { 2207 struct fb_var_screeninfo var = info->var; 2208 2209 ops->graphics = 1; 2210 2211 if (!blank) { 2212 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2213 FB_ACTIVATE_KD_TEXT; 2214 fb_set_var(info, &var); 2215 ops->graphics = 0; 2216 ops->var = info->var; 2217 } 2218 } 2219 2220 if (!fbcon_is_inactive(vc, info)) { 2221 if (ops->blank_state != blank) { 2222 ops->blank_state = blank; 2223 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2224 ops->cursor_flash = (!blank); 2225 2226 if (fb_blank(info, blank)) 2227 fbcon_generic_blank(vc, info, blank); 2228 } 2229 2230 if (!blank) 2231 update_screen(vc); 2232 } 2233 2234 if (mode_switch || fbcon_is_inactive(vc, info) || 2235 ops->blank_state != FB_BLANK_UNBLANK) 2236 fbcon_del_cursor_work(info); 2237 else 2238 fbcon_add_cursor_work(info); 2239 2240 return 0; 2241 } 2242 2243 static int fbcon_debug_enter(struct vc_data *vc) 2244 { 2245 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2246 struct fbcon_ops *ops = info->fbcon_par; 2247 2248 ops->save_graphics = ops->graphics; 2249 ops->graphics = 0; 2250 if (info->fbops->fb_debug_enter) 2251 info->fbops->fb_debug_enter(info); 2252 fbcon_set_palette(vc, color_table); 2253 return 0; 2254 } 2255 2256 static int fbcon_debug_leave(struct vc_data *vc) 2257 { 2258 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2259 struct fbcon_ops *ops = info->fbcon_par; 2260 2261 ops->graphics = ops->save_graphics; 2262 if (info->fbops->fb_debug_leave) 2263 info->fbops->fb_debug_leave(info); 2264 return 0; 2265 } 2266 2267 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2268 { 2269 u8 *fontdata = vc->vc_font.data; 2270 u8 *data = font->data; 2271 int i, j; 2272 2273 font->width = vc->vc_font.width; 2274 font->height = vc->vc_font.height; 2275 if (font->height > vpitch) 2276 return -ENOSPC; 2277 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2278 if (!font->data) 2279 return 0; 2280 2281 if (font->width <= 8) { 2282 j = vc->vc_font.height; 2283 if (font->charcount * j > FNTSIZE(fontdata)) 2284 return -EINVAL; 2285 2286 for (i = 0; i < font->charcount; i++) { 2287 memcpy(data, fontdata, j); 2288 memset(data + j, 0, vpitch - j); 2289 data += vpitch; 2290 fontdata += j; 2291 } 2292 } else if (font->width <= 16) { 2293 j = vc->vc_font.height * 2; 2294 if (font->charcount * j > FNTSIZE(fontdata)) 2295 return -EINVAL; 2296 2297 for (i = 0; i < font->charcount; i++) { 2298 memcpy(data, fontdata, j); 2299 memset(data + j, 0, 2*vpitch - j); 2300 data += 2*vpitch; 2301 fontdata += j; 2302 } 2303 } else if (font->width <= 24) { 2304 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2305 return -EINVAL; 2306 2307 for (i = 0; i < font->charcount; i++) { 2308 for (j = 0; j < vc->vc_font.height; j++) { 2309 *data++ = fontdata[0]; 2310 *data++ = fontdata[1]; 2311 *data++ = fontdata[2]; 2312 fontdata += sizeof(u32); 2313 } 2314 memset(data, 0, 3 * (vpitch - j)); 2315 data += 3 * (vpitch - j); 2316 } 2317 } else { 2318 j = vc->vc_font.height * 4; 2319 if (font->charcount * j > FNTSIZE(fontdata)) 2320 return -EINVAL; 2321 2322 for (i = 0; i < font->charcount; i++) { 2323 memcpy(data, fontdata, j); 2324 memset(data + j, 0, 4 * vpitch - j); 2325 data += 4 * vpitch; 2326 fontdata += j; 2327 } 2328 } 2329 return 0; 2330 } 2331 2332 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2333 static void set_vc_hi_font(struct vc_data *vc, bool set) 2334 { 2335 if (!set) { 2336 vc->vc_hi_font_mask = 0; 2337 if (vc->vc_can_do_color) { 2338 vc->vc_complement_mask >>= 1; 2339 vc->vc_s_complement_mask >>= 1; 2340 } 2341 2342 /* ++Edmund: reorder the attribute bits */ 2343 if (vc->vc_can_do_color) { 2344 unsigned short *cp = 2345 (unsigned short *) vc->vc_origin; 2346 int count = vc->vc_screenbuf_size / 2; 2347 unsigned short c; 2348 for (; count > 0; count--, cp++) { 2349 c = scr_readw(cp); 2350 scr_writew(((c & 0xfe00) >> 1) | 2351 (c & 0xff), cp); 2352 } 2353 c = vc->vc_video_erase_char; 2354 vc->vc_video_erase_char = 2355 ((c & 0xfe00) >> 1) | (c & 0xff); 2356 vc->vc_attr >>= 1; 2357 } 2358 } else { 2359 vc->vc_hi_font_mask = 0x100; 2360 if (vc->vc_can_do_color) { 2361 vc->vc_complement_mask <<= 1; 2362 vc->vc_s_complement_mask <<= 1; 2363 } 2364 2365 /* ++Edmund: reorder the attribute bits */ 2366 { 2367 unsigned short *cp = 2368 (unsigned short *) vc->vc_origin; 2369 int count = vc->vc_screenbuf_size / 2; 2370 unsigned short c; 2371 for (; count > 0; count--, cp++) { 2372 unsigned short newc; 2373 c = scr_readw(cp); 2374 if (vc->vc_can_do_color) 2375 newc = 2376 ((c & 0xff00) << 1) | (c & 2377 0xff); 2378 else 2379 newc = c & ~0x100; 2380 scr_writew(newc, cp); 2381 } 2382 c = vc->vc_video_erase_char; 2383 if (vc->vc_can_do_color) { 2384 vc->vc_video_erase_char = 2385 ((c & 0xff00) << 1) | (c & 0xff); 2386 vc->vc_attr <<= 1; 2387 } else 2388 vc->vc_video_erase_char = c & ~0x100; 2389 } 2390 } 2391 } 2392 2393 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2394 const u8 * data, int userfont) 2395 { 2396 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2397 struct fbcon_ops *ops = info->fbcon_par; 2398 struct fbcon_display *p = &fb_display[vc->vc_num]; 2399 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2400 char *old_data = NULL; 2401 2402 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2403 if (p->userfont) 2404 old_data = vc->vc_font.data; 2405 vc->vc_font.data = (void *)(p->fontdata = data); 2406 old_userfont = p->userfont; 2407 if ((p->userfont = userfont)) 2408 REFCOUNT(data)++; 2409 2410 old_width = vc->vc_font.width; 2411 old_height = vc->vc_font.height; 2412 old_charcount = vc->vc_font.charcount; 2413 2414 vc->vc_font.width = w; 2415 vc->vc_font.height = h; 2416 vc->vc_font.charcount = charcount; 2417 if (vc->vc_hi_font_mask && charcount == 256) 2418 set_vc_hi_font(vc, false); 2419 else if (!vc->vc_hi_font_mask && charcount == 512) 2420 set_vc_hi_font(vc, true); 2421 2422 if (resize) { 2423 int cols, rows; 2424 2425 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2426 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2427 cols /= w; 2428 rows /= h; 2429 ret = vc_resize(vc, cols, rows); 2430 if (ret) 2431 goto err_out; 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 err_out: 2443 p->fontdata = old_data; 2444 vc->vc_font.data = (void *)old_data; 2445 2446 if (userfont) { 2447 p->userfont = old_userfont; 2448 if (--REFCOUNT(data) == 0) 2449 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2450 } 2451 2452 vc->vc_font.width = old_width; 2453 vc->vc_font.height = old_height; 2454 vc->vc_font.charcount = old_charcount; 2455 2456 return ret; 2457 } 2458 2459 /* 2460 * User asked to set font; we are guaranteed that charcount does not exceed 512 2461 * but lets not assume that, since charcount of 512 is small for unicode support. 2462 */ 2463 2464 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2465 unsigned int vpitch, unsigned int flags) 2466 { 2467 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2468 unsigned charcount = font->charcount; 2469 int w = font->width; 2470 int h = font->height; 2471 int size; 2472 int i, csum; 2473 u8 *new_data, *data = font->data; 2474 int pitch = PITCH(font->width); 2475 2476 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2477 * If not this check should be changed to charcount < 256 */ 2478 if (charcount != 256 && charcount != 512) 2479 return -EINVAL; 2480 2481 /* font bigger than screen resolution ? */ 2482 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2483 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2484 return -EINVAL; 2485 2486 if (font->width > 32 || font->height > 32) 2487 return -EINVAL; 2488 2489 /* Make sure drawing engine can handle the font */ 2490 if (!(info->pixmap.blit_x & BIT(font->width - 1)) || 2491 !(info->pixmap.blit_y & BIT(font->height - 1))) 2492 return -EINVAL; 2493 2494 /* Make sure driver can handle the font length */ 2495 if (fbcon_invalid_charcount(info, charcount)) 2496 return -EINVAL; 2497 2498 size = CALC_FONTSZ(h, pitch, charcount); 2499 2500 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2501 2502 if (!new_data) 2503 return -ENOMEM; 2504 2505 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2506 2507 new_data += FONT_EXTRA_WORDS * sizeof(int); 2508 FNTSIZE(new_data) = size; 2509 REFCOUNT(new_data) = 0; /* usage counter */ 2510 for (i=0; i< charcount; i++) { 2511 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2512 } 2513 2514 /* Since linux has a nice crc32 function use it for counting font 2515 * checksums. */ 2516 csum = crc32(0, new_data, size); 2517 2518 FNTSUM(new_data) = csum; 2519 /* Check if the same font is on some other console already */ 2520 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2521 struct vc_data *tmp = vc_cons[i].d; 2522 2523 if (fb_display[i].userfont && 2524 fb_display[i].fontdata && 2525 FNTSUM(fb_display[i].fontdata) == csum && 2526 FNTSIZE(fb_display[i].fontdata) == size && 2527 tmp->vc_font.width == w && 2528 !memcmp(fb_display[i].fontdata, new_data, size)) { 2529 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2530 new_data = (u8 *)fb_display[i].fontdata; 2531 break; 2532 } 2533 } 2534 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2535 } 2536 2537 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2538 { 2539 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2540 const struct font_desc *f; 2541 2542 if (!name) 2543 f = get_default_font(info->var.xres, info->var.yres, 2544 info->pixmap.blit_x, info->pixmap.blit_y); 2545 else if (!(f = find_font(name))) 2546 return -ENOENT; 2547 2548 font->width = f->width; 2549 font->height = f->height; 2550 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2551 } 2552 2553 static u16 palette_red[16]; 2554 static u16 palette_green[16]; 2555 static u16 palette_blue[16]; 2556 2557 static struct fb_cmap palette_cmap = { 2558 0, 16, palette_red, palette_green, palette_blue, NULL 2559 }; 2560 2561 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2562 { 2563 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2564 int i, j, k, depth; 2565 u8 val; 2566 2567 if (fbcon_is_inactive(vc, info)) 2568 return; 2569 2570 if (!con_is_visible(vc)) 2571 return; 2572 2573 depth = fb_get_color_depth(&info->var, &info->fix); 2574 if (depth > 3) { 2575 for (i = j = 0; i < 16; i++) { 2576 k = table[i]; 2577 val = vc->vc_palette[j++]; 2578 palette_red[k] = (val << 8) | val; 2579 val = vc->vc_palette[j++]; 2580 palette_green[k] = (val << 8) | val; 2581 val = vc->vc_palette[j++]; 2582 palette_blue[k] = (val << 8) | val; 2583 } 2584 palette_cmap.len = 16; 2585 palette_cmap.start = 0; 2586 /* 2587 * If framebuffer is capable of less than 16 colors, 2588 * use default palette of fbcon. 2589 */ 2590 } else 2591 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2592 2593 fb_set_cmap(&palette_cmap, info); 2594 } 2595 2596 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2597 { 2598 return (u16 *) (vc->vc_origin + offset); 2599 } 2600 2601 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2602 int *px, int *py) 2603 { 2604 unsigned long ret; 2605 int x, y; 2606 2607 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2608 unsigned long offset = (pos - vc->vc_origin) / 2; 2609 2610 x = offset % vc->vc_cols; 2611 y = offset / vc->vc_cols; 2612 ret = pos + (vc->vc_cols - x) * 2; 2613 } else { 2614 /* Should not happen */ 2615 x = y = 0; 2616 ret = vc->vc_origin; 2617 } 2618 if (px) 2619 *px = x; 2620 if (py) 2621 *py = y; 2622 return ret; 2623 } 2624 2625 /* As we might be inside of softback, we may work with non-contiguous buffer, 2626 that's why we have to use a separate routine. */ 2627 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2628 { 2629 while (cnt--) { 2630 u16 a = scr_readw(p); 2631 if (!vc->vc_can_do_color) 2632 a ^= 0x0800; 2633 else if (vc->vc_hi_font_mask == 0x100) 2634 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2635 (((a) & 0x0e00) << 4); 2636 else 2637 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2638 (((a) & 0x0700) << 4); 2639 scr_writew(a, p++); 2640 } 2641 } 2642 2643 void fbcon_suspended(struct fb_info *info) 2644 { 2645 struct vc_data *vc = NULL; 2646 struct fbcon_ops *ops = info->fbcon_par; 2647 2648 if (!ops || ops->currcon < 0) 2649 return; 2650 vc = vc_cons[ops->currcon].d; 2651 2652 /* Clear cursor, restore saved data */ 2653 fbcon_cursor(vc, CM_ERASE); 2654 } 2655 2656 void fbcon_resumed(struct fb_info *info) 2657 { 2658 struct vc_data *vc; 2659 struct fbcon_ops *ops = info->fbcon_par; 2660 2661 if (!ops || ops->currcon < 0) 2662 return; 2663 vc = vc_cons[ops->currcon].d; 2664 2665 update_screen(vc); 2666 } 2667 2668 static void fbcon_modechanged(struct fb_info *info) 2669 { 2670 struct fbcon_ops *ops = info->fbcon_par; 2671 struct vc_data *vc; 2672 struct fbcon_display *p; 2673 int rows, cols; 2674 2675 if (!ops || ops->currcon < 0) 2676 return; 2677 vc = vc_cons[ops->currcon].d; 2678 if (vc->vc_mode != KD_TEXT || 2679 fbcon_info_from_console(ops->currcon) != info) 2680 return; 2681 2682 p = &fb_display[vc->vc_num]; 2683 set_blitting_type(vc, info); 2684 2685 if (con_is_visible(vc)) { 2686 var_to_display(p, &info->var, info); 2687 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2688 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2689 cols /= vc->vc_font.width; 2690 rows /= vc->vc_font.height; 2691 vc_resize(vc, cols, rows); 2692 updatescrollmode(p, info, vc); 2693 scrollback_max = 0; 2694 scrollback_current = 0; 2695 2696 if (!fbcon_is_inactive(vc, info)) { 2697 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2698 ops->update_start(info); 2699 } 2700 2701 fbcon_set_palette(vc, color_table); 2702 update_screen(vc); 2703 } 2704 } 2705 2706 static void fbcon_set_all_vcs(struct fb_info *info) 2707 { 2708 struct fbcon_ops *ops = info->fbcon_par; 2709 struct vc_data *vc; 2710 struct fbcon_display *p; 2711 int i, rows, cols, fg = -1; 2712 2713 if (!ops || ops->currcon < 0) 2714 return; 2715 2716 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2717 vc = vc_cons[i].d; 2718 if (!vc || vc->vc_mode != KD_TEXT || 2719 fbcon_info_from_console(i) != info) 2720 continue; 2721 2722 if (con_is_visible(vc)) { 2723 fg = i; 2724 continue; 2725 } 2726 2727 p = &fb_display[vc->vc_num]; 2728 set_blitting_type(vc, info); 2729 var_to_display(p, &info->var, info); 2730 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2731 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2732 cols /= vc->vc_font.width; 2733 rows /= vc->vc_font.height; 2734 vc_resize(vc, cols, rows); 2735 } 2736 2737 if (fg != -1) 2738 fbcon_modechanged(info); 2739 } 2740 2741 2742 void fbcon_update_vcs(struct fb_info *info, bool all) 2743 { 2744 if (all) 2745 fbcon_set_all_vcs(info); 2746 else 2747 fbcon_modechanged(info); 2748 } 2749 EXPORT_SYMBOL(fbcon_update_vcs); 2750 2751 /* let fbcon check if it supports a new screen resolution */ 2752 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2753 { 2754 struct fbcon_ops *ops = info->fbcon_par; 2755 struct vc_data *vc; 2756 unsigned int i; 2757 2758 WARN_CONSOLE_UNLOCKED(); 2759 2760 if (!ops) 2761 return 0; 2762 2763 /* prevent setting a screen size which is smaller than font size */ 2764 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2765 vc = vc_cons[i].d; 2766 if (!vc || vc->vc_mode != KD_TEXT || 2767 fbcon_info_from_console(i) != info) 2768 continue; 2769 2770 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2771 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2772 return -EINVAL; 2773 } 2774 2775 return 0; 2776 } 2777 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2778 2779 int fbcon_mode_deleted(struct fb_info *info, 2780 struct fb_videomode *mode) 2781 { 2782 struct fb_info *fb_info; 2783 struct fbcon_display *p; 2784 int i, j, found = 0; 2785 2786 /* before deletion, ensure that mode is not in use */ 2787 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2788 j = con2fb_map[i]; 2789 if (j == -1) 2790 continue; 2791 fb_info = fbcon_registered_fb[j]; 2792 if (fb_info != info) 2793 continue; 2794 p = &fb_display[i]; 2795 if (!p || !p->mode) 2796 continue; 2797 if (fb_mode_is_equal(p->mode, mode)) { 2798 found = 1; 2799 break; 2800 } 2801 } 2802 return found; 2803 } 2804 2805 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2806 static void fbcon_unbind(void) 2807 { 2808 int ret; 2809 2810 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2811 fbcon_is_default); 2812 2813 if (!ret) 2814 fbcon_has_console_bind = 0; 2815 } 2816 #else 2817 static inline void fbcon_unbind(void) {} 2818 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2819 2820 void fbcon_fb_unbind(struct fb_info *info) 2821 { 2822 int i, new_idx = -1; 2823 int idx = info->node; 2824 2825 console_lock(); 2826 2827 if (!fbcon_has_console_bind) { 2828 console_unlock(); 2829 return; 2830 } 2831 2832 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2833 if (con2fb_map[i] != idx && 2834 con2fb_map[i] != -1) { 2835 new_idx = con2fb_map[i]; 2836 break; 2837 } 2838 } 2839 2840 if (new_idx != -1) { 2841 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2842 if (con2fb_map[i] == idx) 2843 set_con2fb_map(i, new_idx, 0); 2844 } 2845 } else { 2846 struct fb_info *info = fbcon_registered_fb[idx]; 2847 2848 /* This is sort of like set_con2fb_map, except it maps 2849 * the consoles to no device and then releases the 2850 * oldinfo to free memory and cancel the cursor blink 2851 * timer. I can imagine this just becoming part of 2852 * set_con2fb_map where new_idx is -1 2853 */ 2854 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2855 if (con2fb_map[i] == idx) { 2856 con2fb_map[i] = -1; 2857 if (!search_fb_in_map(idx)) { 2858 con2fb_release_oldinfo(vc_cons[i].d, 2859 info, NULL); 2860 } 2861 } 2862 } 2863 fbcon_unbind(); 2864 } 2865 2866 console_unlock(); 2867 } 2868 2869 void fbcon_fb_unregistered(struct fb_info *info) 2870 { 2871 int i, idx; 2872 2873 console_lock(); 2874 2875 fbcon_registered_fb[info->node] = NULL; 2876 fbcon_num_registered_fb--; 2877 2878 if (deferred_takeover) { 2879 console_unlock(); 2880 return; 2881 } 2882 2883 idx = info->node; 2884 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2885 if (con2fb_map[i] == idx) 2886 con2fb_map[i] = -1; 2887 } 2888 2889 if (idx == info_idx) { 2890 info_idx = -1; 2891 2892 fbcon_for_each_registered_fb(i) { 2893 info_idx = i; 2894 break; 2895 } 2896 } 2897 2898 if (info_idx != -1) { 2899 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2900 if (con2fb_map[i] == -1) 2901 con2fb_map[i] = info_idx; 2902 } 2903 } 2904 2905 if (primary_device == idx) 2906 primary_device = -1; 2907 2908 if (!fbcon_num_registered_fb) 2909 do_unregister_con_driver(&fb_con); 2910 console_unlock(); 2911 } 2912 2913 void fbcon_remap_all(struct fb_info *info) 2914 { 2915 int i, idx = info->node; 2916 2917 console_lock(); 2918 if (deferred_takeover) { 2919 for (i = first_fb_vc; i <= last_fb_vc; i++) 2920 con2fb_map_boot[i] = idx; 2921 fbcon_map_override(); 2922 console_unlock(); 2923 return; 2924 } 2925 2926 for (i = first_fb_vc; i <= last_fb_vc; i++) 2927 set_con2fb_map(i, idx, 0); 2928 2929 if (con_is_bound(&fb_con)) { 2930 printk(KERN_INFO "fbcon: Remapping primary device, " 2931 "fb%i, to tty %i-%i\n", idx, 2932 first_fb_vc + 1, last_fb_vc + 1); 2933 info_idx = idx; 2934 } 2935 console_unlock(); 2936 } 2937 2938 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2939 static void fbcon_select_primary(struct fb_info *info) 2940 { 2941 if (!map_override && primary_device == -1 && 2942 fb_is_primary_device(info)) { 2943 int i; 2944 2945 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2946 info->fix.id, info->node); 2947 primary_device = info->node; 2948 2949 for (i = first_fb_vc; i <= last_fb_vc; i++) 2950 con2fb_map_boot[i] = primary_device; 2951 2952 if (con_is_bound(&fb_con)) { 2953 printk(KERN_INFO "fbcon: Remapping primary device, " 2954 "fb%i, to tty %i-%i\n", info->node, 2955 first_fb_vc + 1, last_fb_vc + 1); 2956 info_idx = primary_device; 2957 } 2958 } 2959 2960 } 2961 #else 2962 static inline void fbcon_select_primary(struct fb_info *info) 2963 { 2964 return; 2965 } 2966 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2967 2968 static bool lockless_register_fb; 2969 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2970 MODULE_PARM_DESC(lockless_register_fb, 2971 "Lockless framebuffer registration for debugging [default=off]"); 2972 2973 /* called with console_lock held */ 2974 static int do_fb_registered(struct fb_info *info) 2975 { 2976 int ret = 0, i, idx; 2977 2978 WARN_CONSOLE_UNLOCKED(); 2979 2980 fbcon_registered_fb[info->node] = info; 2981 fbcon_num_registered_fb++; 2982 2983 idx = info->node; 2984 fbcon_select_primary(info); 2985 2986 if (deferred_takeover) { 2987 pr_info("fbcon: Deferring console take-over\n"); 2988 return 0; 2989 } 2990 2991 if (info_idx == -1) { 2992 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2993 if (con2fb_map_boot[i] == idx) { 2994 info_idx = idx; 2995 break; 2996 } 2997 } 2998 2999 if (info_idx != -1) 3000 ret = do_fbcon_takeover(1); 3001 } else { 3002 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3003 if (con2fb_map_boot[i] == idx) 3004 set_con2fb_map(i, idx, 0); 3005 } 3006 } 3007 3008 return ret; 3009 } 3010 3011 int fbcon_fb_registered(struct fb_info *info) 3012 { 3013 int ret; 3014 3015 if (!lockless_register_fb) 3016 console_lock(); 3017 else 3018 atomic_inc(&ignore_console_lock_warning); 3019 3020 ret = do_fb_registered(info); 3021 3022 if (!lockless_register_fb) 3023 console_unlock(); 3024 else 3025 atomic_dec(&ignore_console_lock_warning); 3026 3027 return ret; 3028 } 3029 3030 void fbcon_fb_blanked(struct fb_info *info, int blank) 3031 { 3032 struct fbcon_ops *ops = info->fbcon_par; 3033 struct vc_data *vc; 3034 3035 if (!ops || ops->currcon < 0) 3036 return; 3037 3038 vc = vc_cons[ops->currcon].d; 3039 if (vc->vc_mode != KD_TEXT || 3040 fbcon_info_from_console(ops->currcon) != info) 3041 return; 3042 3043 if (con_is_visible(vc)) { 3044 if (blank) 3045 do_blank_screen(0); 3046 else 3047 do_unblank_screen(0); 3048 } 3049 ops->blank_state = blank; 3050 } 3051 3052 void fbcon_new_modelist(struct fb_info *info) 3053 { 3054 int i; 3055 struct vc_data *vc; 3056 struct fb_var_screeninfo var; 3057 const struct fb_videomode *mode; 3058 3059 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3060 if (fbcon_info_from_console(i) != info) 3061 continue; 3062 if (!fb_display[i].mode) 3063 continue; 3064 vc = vc_cons[i].d; 3065 display_to_var(&var, &fb_display[i]); 3066 mode = fb_find_nearest_mode(fb_display[i].mode, 3067 &info->modelist); 3068 fb_videomode_to_var(&var, mode); 3069 fbcon_set_disp(info, &var, vc->vc_num); 3070 } 3071 } 3072 3073 void fbcon_get_requirement(struct fb_info *info, 3074 struct fb_blit_caps *caps) 3075 { 3076 struct vc_data *vc; 3077 3078 if (caps->flags) { 3079 int i, charcnt; 3080 3081 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3082 vc = vc_cons[i].d; 3083 if (vc && vc->vc_mode == KD_TEXT && 3084 info->node == con2fb_map[i]) { 3085 caps->x |= 1 << (vc->vc_font.width - 1); 3086 caps->y |= 1 << (vc->vc_font.height - 1); 3087 charcnt = vc->vc_font.charcount; 3088 if (caps->len < charcnt) 3089 caps->len = charcnt; 3090 } 3091 } 3092 } else { 3093 vc = vc_cons[fg_console].d; 3094 3095 if (vc && vc->vc_mode == KD_TEXT && 3096 info->node == con2fb_map[fg_console]) { 3097 caps->x = 1 << (vc->vc_font.width - 1); 3098 caps->y = 1 << (vc->vc_font.height - 1); 3099 caps->len = vc->vc_font.charcount; 3100 } 3101 } 3102 } 3103 3104 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3105 { 3106 struct fb_con2fbmap con2fb; 3107 int ret; 3108 3109 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3110 return -EFAULT; 3111 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3112 return -EINVAL; 3113 if (con2fb.framebuffer >= FB_MAX) 3114 return -EINVAL; 3115 if (!fbcon_registered_fb[con2fb.framebuffer]) 3116 request_module("fb%d", con2fb.framebuffer); 3117 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3118 return -EINVAL; 3119 } 3120 3121 console_lock(); 3122 ret = set_con2fb_map(con2fb.console - 1, 3123 con2fb.framebuffer, 1); 3124 console_unlock(); 3125 3126 return ret; 3127 } 3128 3129 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3130 { 3131 struct fb_con2fbmap con2fb; 3132 3133 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3134 return -EFAULT; 3135 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3136 return -EINVAL; 3137 3138 console_lock(); 3139 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3140 console_unlock(); 3141 3142 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3143 } 3144 3145 /* 3146 * The console `switch' structure for the frame buffer based console 3147 */ 3148 3149 static const struct consw fb_con = { 3150 .owner = THIS_MODULE, 3151 .con_startup = fbcon_startup, 3152 .con_init = fbcon_init, 3153 .con_deinit = fbcon_deinit, 3154 .con_clear = fbcon_clear, 3155 .con_putc = fbcon_putc, 3156 .con_putcs = fbcon_putcs, 3157 .con_cursor = fbcon_cursor, 3158 .con_scroll = fbcon_scroll, 3159 .con_switch = fbcon_switch, 3160 .con_blank = fbcon_blank, 3161 .con_font_set = fbcon_set_font, 3162 .con_font_get = fbcon_get_font, 3163 .con_font_default = fbcon_set_def_font, 3164 .con_set_palette = fbcon_set_palette, 3165 .con_invert_region = fbcon_invert_region, 3166 .con_screen_pos = fbcon_screen_pos, 3167 .con_getxy = fbcon_getxy, 3168 .con_resize = fbcon_resize, 3169 .con_debug_enter = fbcon_debug_enter, 3170 .con_debug_leave = fbcon_debug_leave, 3171 }; 3172 3173 static ssize_t store_rotate(struct device *device, 3174 struct device_attribute *attr, const char *buf, 3175 size_t count) 3176 { 3177 struct fb_info *info; 3178 int rotate, idx; 3179 char **last = NULL; 3180 3181 console_lock(); 3182 idx = con2fb_map[fg_console]; 3183 3184 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3185 goto err; 3186 3187 info = fbcon_registered_fb[idx]; 3188 rotate = simple_strtoul(buf, last, 0); 3189 fbcon_rotate(info, rotate); 3190 err: 3191 console_unlock(); 3192 return count; 3193 } 3194 3195 static ssize_t store_rotate_all(struct device *device, 3196 struct device_attribute *attr,const char *buf, 3197 size_t count) 3198 { 3199 struct fb_info *info; 3200 int rotate, idx; 3201 char **last = NULL; 3202 3203 console_lock(); 3204 idx = con2fb_map[fg_console]; 3205 3206 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3207 goto err; 3208 3209 info = fbcon_registered_fb[idx]; 3210 rotate = simple_strtoul(buf, last, 0); 3211 fbcon_rotate_all(info, rotate); 3212 err: 3213 console_unlock(); 3214 return count; 3215 } 3216 3217 static ssize_t show_rotate(struct device *device, 3218 struct device_attribute *attr,char *buf) 3219 { 3220 struct fb_info *info; 3221 int rotate = 0, idx; 3222 3223 console_lock(); 3224 idx = con2fb_map[fg_console]; 3225 3226 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3227 goto err; 3228 3229 info = fbcon_registered_fb[idx]; 3230 rotate = fbcon_get_rotate(info); 3231 err: 3232 console_unlock(); 3233 return sysfs_emit(buf, "%d\n", rotate); 3234 } 3235 3236 static ssize_t show_cursor_blink(struct device *device, 3237 struct device_attribute *attr, char *buf) 3238 { 3239 struct fb_info *info; 3240 struct fbcon_ops *ops; 3241 int idx, blink = -1; 3242 3243 console_lock(); 3244 idx = con2fb_map[fg_console]; 3245 3246 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3247 goto err; 3248 3249 info = fbcon_registered_fb[idx]; 3250 ops = info->fbcon_par; 3251 3252 if (!ops) 3253 goto err; 3254 3255 blink = delayed_work_pending(&ops->cursor_work); 3256 err: 3257 console_unlock(); 3258 return sysfs_emit(buf, "%d\n", blink); 3259 } 3260 3261 static ssize_t store_cursor_blink(struct device *device, 3262 struct device_attribute *attr, 3263 const char *buf, size_t count) 3264 { 3265 struct fb_info *info; 3266 int blink, idx; 3267 char **last = NULL; 3268 3269 console_lock(); 3270 idx = con2fb_map[fg_console]; 3271 3272 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3273 goto err; 3274 3275 info = fbcon_registered_fb[idx]; 3276 3277 if (!info->fbcon_par) 3278 goto err; 3279 3280 blink = simple_strtoul(buf, last, 0); 3281 3282 if (blink) { 3283 fbcon_cursor_noblink = 0; 3284 fbcon_add_cursor_work(info); 3285 } else { 3286 fbcon_cursor_noblink = 1; 3287 fbcon_del_cursor_work(info); 3288 } 3289 3290 err: 3291 console_unlock(); 3292 return count; 3293 } 3294 3295 static struct device_attribute device_attrs[] = { 3296 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3297 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3298 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3299 store_cursor_blink), 3300 }; 3301 3302 static int fbcon_init_device(void) 3303 { 3304 int i, error = 0; 3305 3306 fbcon_has_sysfs = 1; 3307 3308 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3309 error = device_create_file(fbcon_device, &device_attrs[i]); 3310 3311 if (error) 3312 break; 3313 } 3314 3315 if (error) { 3316 while (--i >= 0) 3317 device_remove_file(fbcon_device, &device_attrs[i]); 3318 3319 fbcon_has_sysfs = 0; 3320 } 3321 3322 return 0; 3323 } 3324 3325 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3326 static void fbcon_register_existing_fbs(struct work_struct *work) 3327 { 3328 int i; 3329 3330 console_lock(); 3331 3332 deferred_takeover = false; 3333 logo_shown = FBCON_LOGO_DONTSHOW; 3334 3335 fbcon_for_each_registered_fb(i) 3336 do_fb_registered(fbcon_registered_fb[i]); 3337 3338 console_unlock(); 3339 } 3340 3341 static struct notifier_block fbcon_output_nb; 3342 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3343 3344 static int fbcon_output_notifier(struct notifier_block *nb, 3345 unsigned long action, void *data) 3346 { 3347 WARN_CONSOLE_UNLOCKED(); 3348 3349 pr_info("fbcon: Taking over console\n"); 3350 3351 dummycon_unregister_output_notifier(&fbcon_output_nb); 3352 3353 /* We may get called in atomic context */ 3354 schedule_work(&fbcon_deferred_takeover_work); 3355 3356 return NOTIFY_OK; 3357 } 3358 #endif 3359 3360 static void fbcon_start(void) 3361 { 3362 WARN_CONSOLE_UNLOCKED(); 3363 3364 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3365 if (conswitchp != &dummy_con) 3366 deferred_takeover = false; 3367 3368 if (deferred_takeover) { 3369 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3370 dummycon_register_output_notifier(&fbcon_output_nb); 3371 return; 3372 } 3373 #endif 3374 } 3375 3376 void __init fb_console_init(void) 3377 { 3378 int i; 3379 3380 console_lock(); 3381 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3382 "fbcon"); 3383 3384 if (IS_ERR(fbcon_device)) { 3385 printk(KERN_WARNING "Unable to create device " 3386 "for fbcon; errno = %ld\n", 3387 PTR_ERR(fbcon_device)); 3388 fbcon_device = NULL; 3389 } else 3390 fbcon_init_device(); 3391 3392 for (i = 0; i < MAX_NR_CONSOLES; i++) 3393 con2fb_map[i] = -1; 3394 3395 fbcon_start(); 3396 console_unlock(); 3397 } 3398 3399 #ifdef MODULE 3400 3401 static void __exit fbcon_deinit_device(void) 3402 { 3403 int i; 3404 3405 if (fbcon_has_sysfs) { 3406 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3407 device_remove_file(fbcon_device, &device_attrs[i]); 3408 3409 fbcon_has_sysfs = 0; 3410 } 3411 } 3412 3413 void __exit fb_console_exit(void) 3414 { 3415 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3416 console_lock(); 3417 if (deferred_takeover) 3418 dummycon_unregister_output_notifier(&fbcon_output_nb); 3419 console_unlock(); 3420 3421 cancel_work_sync(&fbcon_deferred_takeover_work); 3422 #endif 3423 3424 console_lock(); 3425 fbcon_deinit_device(); 3426 device_destroy(fb_class, MKDEV(0, 0)); 3427 3428 do_unregister_con_driver(&fb_con); 3429 console_unlock(); 3430 } 3431 #endif 3432