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 #include "fb_internal.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 90 * means concurrent access to the same fbdev from both fbcon and userspace 91 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 92 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 93 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 94 * fbmem.c cannot use locking asserts, and there's lots of callers which get 95 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 96 */ 97 98 enum { 99 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 100 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 101 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 102 }; 103 104 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 105 106 static struct fb_info *fbcon_registered_fb[FB_MAX]; 107 static int fbcon_num_registered_fb; 108 109 #define fbcon_for_each_registered_fb(i) \ 110 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 111 if (!fbcon_registered_fb[i]) {} else 112 113 static signed char con2fb_map[MAX_NR_CONSOLES]; 114 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 115 116 static struct fb_info *fbcon_info_from_console(int console) 117 { 118 WARN_CONSOLE_UNLOCKED(); 119 120 return fbcon_registered_fb[con2fb_map[console]]; 121 } 122 123 static int logo_lines; 124 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 125 enums. */ 126 static int logo_shown = FBCON_LOGO_CANSHOW; 127 /* console mappings */ 128 static unsigned int first_fb_vc; 129 static unsigned int last_fb_vc = MAX_NR_CONSOLES - 1; 130 static int fbcon_is_default = 1; 131 static int primary_device = -1; 132 static int fbcon_has_console_bind; 133 134 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 135 static int map_override; 136 137 static inline void fbcon_map_override(void) 138 { 139 map_override = 1; 140 } 141 #else 142 static inline void fbcon_map_override(void) 143 { 144 } 145 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 146 147 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 148 static bool deferred_takeover = true; 149 #else 150 #define deferred_takeover false 151 #endif 152 153 /* font data */ 154 static char fontname[40]; 155 156 /* current fb_info */ 157 static int info_idx = -1; 158 159 /* console rotation */ 160 static int initial_rotation = -1; 161 static int fbcon_has_sysfs; 162 static int margin_color; 163 164 static const struct consw fb_con; 165 166 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 167 168 static int fbcon_cursor_noblink; 169 170 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 171 172 /* 173 * Interface used by the world 174 */ 175 176 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 177 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 178 179 /* 180 * Internal routines 181 */ 182 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 183 int unit); 184 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 185 int line, int count, int dy); 186 static void fbcon_modechanged(struct fb_info *info); 187 static void fbcon_set_all_vcs(struct fb_info *info); 188 189 static struct device *fbcon_device; 190 191 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 192 static inline void fbcon_set_rotation(struct fb_info *info) 193 { 194 struct fbcon_ops *ops = info->fbcon_par; 195 196 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 197 ops->p->con_rotate < 4) 198 ops->rotate = ops->p->con_rotate; 199 else 200 ops->rotate = 0; 201 } 202 203 static void fbcon_rotate(struct fb_info *info, u32 rotate) 204 { 205 struct fbcon_ops *ops= info->fbcon_par; 206 struct fb_info *fb_info; 207 208 if (!ops || ops->currcon == -1) 209 return; 210 211 fb_info = fbcon_info_from_console(ops->currcon); 212 213 if (info == fb_info) { 214 struct fbcon_display *p = &fb_display[ops->currcon]; 215 216 if (rotate < 4) 217 p->con_rotate = rotate; 218 else 219 p->con_rotate = 0; 220 221 fbcon_modechanged(info); 222 } 223 } 224 225 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 226 { 227 struct fbcon_ops *ops = info->fbcon_par; 228 struct vc_data *vc; 229 struct fbcon_display *p; 230 int i; 231 232 if (!ops || ops->currcon < 0 || rotate > 3) 233 return; 234 235 for (i = first_fb_vc; i <= last_fb_vc; i++) { 236 vc = vc_cons[i].d; 237 if (!vc || vc->vc_mode != KD_TEXT || 238 fbcon_info_from_console(i) != info) 239 continue; 240 241 p = &fb_display[vc->vc_num]; 242 p->con_rotate = rotate; 243 } 244 245 fbcon_set_all_vcs(info); 246 } 247 #else 248 static inline void fbcon_set_rotation(struct fb_info *info) 249 { 250 struct fbcon_ops *ops = info->fbcon_par; 251 252 ops->rotate = FB_ROTATE_UR; 253 } 254 255 static void fbcon_rotate(struct fb_info *info, u32 rotate) 256 { 257 return; 258 } 259 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 261 { 262 return; 263 } 264 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 265 266 static int fbcon_get_rotate(struct fb_info *info) 267 { 268 struct fbcon_ops *ops = info->fbcon_par; 269 270 return (ops) ? ops->rotate : 0; 271 } 272 273 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 274 { 275 struct fbcon_ops *ops = info->fbcon_par; 276 277 return (info->state != FBINFO_STATE_RUNNING || 278 vc->vc_mode != KD_TEXT || ops->graphics); 279 } 280 281 static int get_color(struct vc_data *vc, struct fb_info *info, 282 u16 c, int is_fg) 283 { 284 int depth = fb_get_color_depth(&info->var, &info->fix); 285 int color = 0; 286 287 if (console_blanked) { 288 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 289 290 c = vc->vc_video_erase_char & charmask; 291 } 292 293 if (depth != 1) 294 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 295 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 296 297 switch (depth) { 298 case 1: 299 { 300 int col = mono_col(info); 301 /* 0 or 1 */ 302 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 303 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 304 305 if (console_blanked) 306 fg = bg; 307 308 color = (is_fg) ? fg : bg; 309 break; 310 } 311 case 2: 312 /* 313 * Scale down 16-colors to 4 colors. Default 4-color palette 314 * is grayscale. However, simply dividing the values by 4 315 * will not work, as colors 1, 2 and 3 will be scaled-down 316 * to zero rendering them invisible. So empirically convert 317 * colors to a sane 4-level grayscale. 318 */ 319 switch (color) { 320 case 0: 321 color = 0; /* black */ 322 break; 323 case 1 ... 6: 324 color = 2; /* white */ 325 break; 326 case 7 ... 8: 327 color = 1; /* gray */ 328 break; 329 default: 330 color = 3; /* intense white */ 331 break; 332 } 333 break; 334 case 3: 335 /* 336 * Last 8 entries of default 16-color palette is a more intense 337 * version of the first 8 (i.e., same chrominance, different 338 * luminance). 339 */ 340 color &= 7; 341 break; 342 } 343 344 345 return color; 346 } 347 348 static void fb_flashcursor(struct work_struct *work) 349 { 350 struct fbcon_ops *ops = container_of(work, struct fbcon_ops, cursor_work.work); 351 struct fb_info *info; 352 struct vc_data *vc = NULL; 353 int c; 354 bool enable; 355 int ret; 356 357 /* FIXME: we should sort out the unbind locking instead */ 358 /* instead we just fail to flash the cursor if we can't get 359 * the lock instead of blocking fbcon deinit */ 360 ret = console_trylock(); 361 if (ret == 0) 362 return; 363 364 /* protected by console_lock */ 365 info = ops->info; 366 367 if (ops->currcon != -1) 368 vc = vc_cons[ops->currcon].d; 369 370 if (!vc || !con_is_visible(vc) || 371 fbcon_info_from_console(vc->vc_num) != info || 372 vc->vc_deccm != 1) { 373 console_unlock(); 374 return; 375 } 376 377 c = scr_readw((u16 *) vc->vc_pos); 378 enable = ops->cursor_flash && !ops->cursor_state.enable; 379 ops->cursor(vc, info, enable, 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 #ifdef CONFIG_LOGO 475 if (!strncmp(options, "logo-pos:", 9)) { 476 options += 9; 477 if (!strcmp(options, "center")) 478 fb_center_logo = true; 479 continue; 480 } 481 482 if (!strncmp(options, "logo-count:", 11)) { 483 options += 11; 484 if (*options) 485 fb_logo_count = simple_strtol(options, &options, 0); 486 continue; 487 } 488 #endif 489 } 490 return 1; 491 } 492 493 __setup("fbcon=", fb_console_setup); 494 #endif 495 496 static int search_fb_in_map(int idx) 497 { 498 int i, retval = 0; 499 500 for (i = first_fb_vc; i <= last_fb_vc; i++) { 501 if (con2fb_map[i] == idx) 502 retval = 1; 503 } 504 return retval; 505 } 506 507 static int search_for_mapped_con(void) 508 { 509 int i, retval = 0; 510 511 for (i = first_fb_vc; i <= last_fb_vc; i++) { 512 if (con2fb_map[i] != -1) 513 retval = 1; 514 } 515 return retval; 516 } 517 518 static int do_fbcon_takeover(int show_logo) 519 { 520 int err, i; 521 522 if (!fbcon_num_registered_fb) 523 return -ENODEV; 524 525 if (!show_logo) 526 logo_shown = FBCON_LOGO_DONTSHOW; 527 528 for (i = first_fb_vc; i <= last_fb_vc; i++) 529 con2fb_map[i] = info_idx; 530 531 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 532 fbcon_is_default); 533 534 if (err) { 535 for (i = first_fb_vc; i <= last_fb_vc; i++) 536 con2fb_map[i] = -1; 537 info_idx = -1; 538 } else { 539 fbcon_has_console_bind = 1; 540 } 541 542 return err; 543 } 544 545 #ifdef MODULE 546 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 547 int cols, int rows, int new_cols, int new_rows) 548 { 549 logo_shown = FBCON_LOGO_DONTSHOW; 550 } 551 #else 552 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 553 int cols, int rows, int new_cols, int new_rows) 554 { 555 /* Need to make room for the logo */ 556 struct fbcon_ops *ops = info->fbcon_par; 557 int cnt, erase = vc->vc_video_erase_char, step; 558 unsigned short *save = NULL, *r, *q; 559 int logo_height; 560 561 if (info->fbops->owner) { 562 logo_shown = FBCON_LOGO_DONTSHOW; 563 return; 564 } 565 566 /* 567 * remove underline attribute from erase character 568 * if black and white framebuffer. 569 */ 570 if (fb_get_color_depth(&info->var, &info->fix) == 1) 571 erase &= ~0x400; 572 logo_height = fb_prepare_logo(info, ops->rotate); 573 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 574 q = (unsigned short *) (vc->vc_origin + 575 vc->vc_size_row * rows); 576 step = logo_lines * cols; 577 for (r = q - logo_lines * cols; r < q; r++) 578 if (scr_readw(r) != vc->vc_video_erase_char) 579 break; 580 if (r != q && new_rows >= rows + logo_lines) { 581 save = kmalloc(array3_size(logo_lines, new_cols, 2), 582 GFP_KERNEL); 583 if (save) { 584 int i = min(cols, new_cols); 585 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 586 r = q - step; 587 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 588 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 589 r = q; 590 } 591 } 592 if (r == q) { 593 /* We can scroll screen down */ 594 r = q - step - cols; 595 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 596 scr_memcpyw(r + step, r, vc->vc_size_row); 597 r -= cols; 598 } 599 if (!save) { 600 int lines; 601 if (vc->state.y + logo_lines >= rows) 602 lines = rows - vc->state.y - 1; 603 else 604 lines = logo_lines; 605 vc->state.y += lines; 606 vc->vc_pos += lines * vc->vc_size_row; 607 } 608 } 609 scr_memsetw((unsigned short *) vc->vc_origin, 610 erase, 611 vc->vc_size_row * logo_lines); 612 613 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 614 fbcon_clear_margins(vc, 0); 615 update_screen(vc); 616 } 617 618 if (save) { 619 q = (unsigned short *) (vc->vc_origin + 620 vc->vc_size_row * 621 rows); 622 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 623 vc->state.y += logo_lines; 624 vc->vc_pos += logo_lines * vc->vc_size_row; 625 kfree(save); 626 } 627 628 if (logo_shown == FBCON_LOGO_DONTSHOW) 629 return; 630 631 if (logo_lines > vc->vc_bottom) { 632 logo_shown = FBCON_LOGO_CANSHOW; 633 printk(KERN_INFO 634 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 635 } else { 636 logo_shown = FBCON_LOGO_DRAW; 637 vc->vc_top = logo_lines; 638 } 639 } 640 #endif /* MODULE */ 641 642 #ifdef CONFIG_FB_TILEBLITTING 643 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 644 { 645 struct fbcon_ops *ops = info->fbcon_par; 646 647 ops->p = &fb_display[vc->vc_num]; 648 649 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 650 fbcon_set_tileops(vc, info); 651 else { 652 fbcon_set_rotation(info); 653 fbcon_set_bitops(ops); 654 } 655 } 656 657 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 658 { 659 int err = 0; 660 661 if (info->flags & FBINFO_MISC_TILEBLITTING && 662 info->tileops->fb_get_tilemax(info) < charcount) 663 err = 1; 664 665 return err; 666 } 667 #else 668 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 669 { 670 struct fbcon_ops *ops = info->fbcon_par; 671 672 info->flags &= ~FBINFO_MISC_TILEBLITTING; 673 ops->p = &fb_display[vc->vc_num]; 674 fbcon_set_rotation(info); 675 fbcon_set_bitops(ops); 676 } 677 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 679 { 680 return 0; 681 } 682 683 #endif /* CONFIG_MISC_TILEBLITTING */ 684 685 static void fbcon_release(struct fb_info *info) 686 { 687 lock_fb_info(info); 688 if (info->fbops->fb_release) 689 info->fbops->fb_release(info, 0); 690 unlock_fb_info(info); 691 692 module_put(info->fbops->owner); 693 694 if (info->fbcon_par) { 695 struct fbcon_ops *ops = info->fbcon_par; 696 697 fbcon_del_cursor_work(info); 698 kfree(ops->cursor_state.mask); 699 kfree(ops->cursor_data); 700 kfree(ops->cursor_src); 701 kfree(ops->fontbuffer); 702 kfree(info->fbcon_par); 703 info->fbcon_par = NULL; 704 } 705 } 706 707 static int fbcon_open(struct fb_info *info) 708 { 709 struct fbcon_ops *ops; 710 711 if (!try_module_get(info->fbops->owner)) 712 return -ENODEV; 713 714 lock_fb_info(info); 715 if (info->fbops->fb_open && 716 info->fbops->fb_open(info, 0)) { 717 unlock_fb_info(info); 718 module_put(info->fbops->owner); 719 return -ENODEV; 720 } 721 unlock_fb_info(info); 722 723 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 724 if (!ops) { 725 fbcon_release(info); 726 return -ENOMEM; 727 } 728 729 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 730 ops->info = info; 731 info->fbcon_par = ops; 732 ops->cur_blink_jiffies = HZ / 5; 733 734 return 0; 735 } 736 737 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 738 int unit) 739 { 740 int err; 741 742 err = fbcon_open(info); 743 if (err) 744 return err; 745 746 if (vc) 747 set_blitting_type(vc, info); 748 749 return err; 750 } 751 752 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 753 struct fb_info *newinfo) 754 { 755 int ret; 756 757 fbcon_release(oldinfo); 758 759 /* 760 If oldinfo and newinfo are driving the same hardware, 761 the fb_release() method of oldinfo may attempt to 762 restore the hardware state. This will leave the 763 newinfo in an undefined state. Thus, a call to 764 fb_set_par() may be needed for the newinfo. 765 */ 766 if (newinfo && newinfo->fbops->fb_set_par) { 767 ret = newinfo->fbops->fb_set_par(newinfo); 768 769 if (ret) 770 printk(KERN_ERR "con2fb_release_oldinfo: " 771 "detected unhandled fb_set_par error, " 772 "error code %d\n", ret); 773 } 774 } 775 776 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 777 int unit, int show_logo) 778 { 779 struct fbcon_ops *ops = info->fbcon_par; 780 int ret; 781 782 ops->currcon = fg_console; 783 784 if (info->fbops->fb_set_par && !ops->initialized) { 785 ret = info->fbops->fb_set_par(info); 786 787 if (ret) 788 printk(KERN_ERR "con2fb_init_display: detected " 789 "unhandled fb_set_par error, " 790 "error code %d\n", ret); 791 } 792 793 ops->initialized = true; 794 ops->graphics = 0; 795 fbcon_set_disp(info, &info->var, unit); 796 797 if (show_logo) { 798 struct vc_data *fg_vc = vc_cons[fg_console].d; 799 struct fb_info *fg_info = 800 fbcon_info_from_console(fg_console); 801 802 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 803 fg_vc->vc_rows, fg_vc->vc_cols, 804 fg_vc->vc_rows); 805 } 806 807 update_screen(vc_cons[fg_console].d); 808 } 809 810 /** 811 * set_con2fb_map - map console to frame buffer device 812 * @unit: virtual console number to map 813 * @newidx: frame buffer index to map virtual console to 814 * @user: user request 815 * 816 * Maps a virtual console @unit to a frame buffer device 817 * @newidx. 818 * 819 * This should be called with the console lock held. 820 */ 821 static int set_con2fb_map(int unit, int newidx, int user) 822 { 823 struct vc_data *vc = vc_cons[unit].d; 824 int oldidx = con2fb_map[unit]; 825 struct fb_info *info = fbcon_registered_fb[newidx]; 826 struct fb_info *oldinfo = NULL; 827 int err = 0, show_logo; 828 829 WARN_CONSOLE_UNLOCKED(); 830 831 if (oldidx == newidx) 832 return 0; 833 834 if (!info) 835 return -EINVAL; 836 837 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 838 info_idx = newidx; 839 return do_fbcon_takeover(0); 840 } 841 842 if (oldidx != -1) 843 oldinfo = fbcon_registered_fb[oldidx]; 844 845 if (!search_fb_in_map(newidx)) { 846 err = con2fb_acquire_newinfo(vc, info, unit); 847 if (err) 848 return err; 849 850 fbcon_add_cursor_work(info); 851 } 852 853 con2fb_map[unit] = newidx; 854 855 /* 856 * If old fb is not mapped to any of the consoles, 857 * fbcon should release it. 858 */ 859 if (oldinfo && !search_fb_in_map(oldidx)) 860 con2fb_release_oldinfo(vc, oldinfo, info); 861 862 show_logo = (fg_console == 0 && !user && 863 logo_shown != FBCON_LOGO_DONTSHOW); 864 865 con2fb_map_boot[unit] = newidx; 866 con2fb_init_display(vc, info, unit, show_logo); 867 868 if (!search_fb_in_map(info_idx)) 869 info_idx = newidx; 870 871 return err; 872 } 873 874 /* 875 * Low Level Operations 876 */ 877 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 878 static int var_to_display(struct fbcon_display *disp, 879 struct fb_var_screeninfo *var, 880 struct fb_info *info) 881 { 882 disp->xres_virtual = var->xres_virtual; 883 disp->yres_virtual = var->yres_virtual; 884 disp->bits_per_pixel = var->bits_per_pixel; 885 disp->grayscale = var->grayscale; 886 disp->nonstd = var->nonstd; 887 disp->accel_flags = var->accel_flags; 888 disp->height = var->height; 889 disp->width = var->width; 890 disp->red = var->red; 891 disp->green = var->green; 892 disp->blue = var->blue; 893 disp->transp = var->transp; 894 disp->rotate = var->rotate; 895 disp->mode = fb_match_mode(var, &info->modelist); 896 if (disp->mode == NULL) 897 /* This should not happen */ 898 return -EINVAL; 899 return 0; 900 } 901 902 static void display_to_var(struct fb_var_screeninfo *var, 903 struct fbcon_display *disp) 904 { 905 fb_videomode_to_var(var, disp->mode); 906 var->xres_virtual = disp->xres_virtual; 907 var->yres_virtual = disp->yres_virtual; 908 var->bits_per_pixel = disp->bits_per_pixel; 909 var->grayscale = disp->grayscale; 910 var->nonstd = disp->nonstd; 911 var->accel_flags = disp->accel_flags; 912 var->height = disp->height; 913 var->width = disp->width; 914 var->red = disp->red; 915 var->green = disp->green; 916 var->blue = disp->blue; 917 var->transp = disp->transp; 918 var->rotate = disp->rotate; 919 } 920 921 static const char *fbcon_startup(void) 922 { 923 static const char display_desc[] = "frame buffer device"; 924 struct fbcon_display *p = &fb_display[fg_console]; 925 struct vc_data *vc = vc_cons[fg_console].d; 926 const struct font_desc *font = NULL; 927 struct fb_info *info = NULL; 928 struct fbcon_ops *ops; 929 int rows, cols; 930 931 /* 932 * If num_registered_fb is zero, this is a call for the dummy part. 933 * The frame buffer devices weren't initialized yet. 934 */ 935 if (!fbcon_num_registered_fb || info_idx == -1) 936 return display_desc; 937 /* 938 * Instead of blindly using registered_fb[0], we use info_idx, set by 939 * fbcon_fb_registered(); 940 */ 941 info = fbcon_registered_fb[info_idx]; 942 if (!info) 943 return NULL; 944 945 if (fbcon_open(info)) 946 return NULL; 947 948 ops = info->fbcon_par; 949 ops->currcon = -1; 950 ops->graphics = 1; 951 ops->cur_rotate = -1; 952 953 p->con_rotate = initial_rotation; 954 if (p->con_rotate == -1) 955 p->con_rotate = info->fbcon_rotate_hint; 956 if (p->con_rotate == -1) 957 p->con_rotate = FB_ROTATE_UR; 958 959 set_blitting_type(vc, info); 960 961 /* Setup default font */ 962 if (!p->fontdata) { 963 if (!fontname[0] || !(font = find_font(fontname))) 964 font = get_default_font(info->var.xres, 965 info->var.yres, 966 info->pixmap.blit_x, 967 info->pixmap.blit_y); 968 vc->vc_font.width = font->width; 969 vc->vc_font.height = font->height; 970 vc->vc_font.data = (void *)(p->fontdata = font->data); 971 vc->vc_font.charcount = font->charcount; 972 } 973 974 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 975 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 976 cols /= vc->vc_font.width; 977 rows /= vc->vc_font.height; 978 vc_resize(vc, cols, rows); 979 980 pr_debug("mode: %s\n", info->fix.id); 981 pr_debug("visual: %d\n", info->fix.visual); 982 pr_debug("res: %dx%d-%d\n", info->var.xres, 983 info->var.yres, 984 info->var.bits_per_pixel); 985 986 fbcon_add_cursor_work(info); 987 return display_desc; 988 } 989 990 static void fbcon_init(struct vc_data *vc, bool init) 991 { 992 struct fb_info *info; 993 struct fbcon_ops *ops; 994 struct vc_data **default_mode = vc->vc_display_fg; 995 struct vc_data *svc = *default_mode; 996 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 997 int logo = 1, new_rows, new_cols, rows, cols; 998 int ret; 999 1000 if (WARN_ON(info_idx == -1)) 1001 return; 1002 1003 if (con2fb_map[vc->vc_num] == -1) 1004 con2fb_map[vc->vc_num] = info_idx; 1005 1006 info = fbcon_info_from_console(vc->vc_num); 1007 1008 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1009 logo_shown = FBCON_LOGO_DONTSHOW; 1010 1011 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1012 (info->fix.type == FB_TYPE_TEXT)) 1013 logo = 0; 1014 1015 if (var_to_display(p, &info->var, info)) 1016 return; 1017 1018 if (!info->fbcon_par) 1019 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1020 1021 /* If we are not the first console on this 1022 fb, copy the font from that console */ 1023 t = &fb_display[fg_console]; 1024 if (!p->fontdata) { 1025 if (t->fontdata) { 1026 struct vc_data *fvc = vc_cons[fg_console].d; 1027 1028 vc->vc_font.data = (void *)(p->fontdata = 1029 fvc->vc_font.data); 1030 vc->vc_font.width = fvc->vc_font.width; 1031 vc->vc_font.height = fvc->vc_font.height; 1032 vc->vc_font.charcount = fvc->vc_font.charcount; 1033 p->userfont = t->userfont; 1034 1035 if (p->userfont) 1036 REFCOUNT(p->fontdata)++; 1037 } else { 1038 const struct font_desc *font = NULL; 1039 1040 if (!fontname[0] || !(font = find_font(fontname))) 1041 font = get_default_font(info->var.xres, 1042 info->var.yres, 1043 info->pixmap.blit_x, 1044 info->pixmap.blit_y); 1045 vc->vc_font.width = font->width; 1046 vc->vc_font.height = font->height; 1047 vc->vc_font.data = (void *)(p->fontdata = font->data); 1048 vc->vc_font.charcount = font->charcount; 1049 } 1050 } 1051 1052 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1053 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1054 if (vc->vc_font.charcount == 256) { 1055 vc->vc_hi_font_mask = 0; 1056 } else { 1057 vc->vc_hi_font_mask = 0x100; 1058 if (vc->vc_can_do_color) 1059 vc->vc_complement_mask <<= 1; 1060 } 1061 1062 if (!*svc->uni_pagedict_loc) 1063 con_set_default_unimap(svc); 1064 if (!*vc->uni_pagedict_loc) 1065 con_copy_unimap(vc, svc); 1066 1067 ops = info->fbcon_par; 1068 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1069 1070 p->con_rotate = initial_rotation; 1071 if (p->con_rotate == -1) 1072 p->con_rotate = info->fbcon_rotate_hint; 1073 if (p->con_rotate == -1) 1074 p->con_rotate = FB_ROTATE_UR; 1075 1076 set_blitting_type(vc, info); 1077 1078 cols = vc->vc_cols; 1079 rows = vc->vc_rows; 1080 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1081 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1082 new_cols /= vc->vc_font.width; 1083 new_rows /= vc->vc_font.height; 1084 1085 /* 1086 * We must always set the mode. The mode of the previous console 1087 * driver could be in the same resolution but we are using different 1088 * hardware so we have to initialize the hardware. 1089 * 1090 * We need to do it in fbcon_init() to prevent screen corruption. 1091 */ 1092 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1093 if (info->fbops->fb_set_par && !ops->initialized) { 1094 ret = info->fbops->fb_set_par(info); 1095 1096 if (ret) 1097 printk(KERN_ERR "fbcon_init: detected " 1098 "unhandled fb_set_par error, " 1099 "error code %d\n", ret); 1100 } 1101 1102 ops->initialized = true; 1103 } 1104 1105 ops->graphics = 0; 1106 1107 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1108 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1109 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1110 p->scrollmode = SCROLL_MOVE; 1111 else /* default to something safe */ 1112 p->scrollmode = SCROLL_REDRAW; 1113 #endif 1114 1115 /* 1116 * ++guenther: console.c:vc_allocate() relies on initializing 1117 * vc_{cols,rows}, but we must not set those if we are only 1118 * resizing the console. 1119 */ 1120 if (init) { 1121 vc->vc_cols = new_cols; 1122 vc->vc_rows = new_rows; 1123 } else 1124 vc_resize(vc, new_cols, new_rows); 1125 1126 if (logo) 1127 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1128 1129 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1130 ops->rotate = FB_ROTATE_UR; 1131 set_blitting_type(vc, info); 1132 } 1133 1134 ops->p = &fb_display[fg_console]; 1135 } 1136 1137 static void fbcon_free_font(struct fbcon_display *p) 1138 { 1139 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1140 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1141 p->fontdata = NULL; 1142 p->userfont = 0; 1143 } 1144 1145 static void set_vc_hi_font(struct vc_data *vc, bool set); 1146 1147 static void fbcon_release_all(void) 1148 { 1149 struct fb_info *info; 1150 int i, j, mapped; 1151 1152 fbcon_for_each_registered_fb(i) { 1153 mapped = 0; 1154 info = fbcon_registered_fb[i]; 1155 1156 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1157 if (con2fb_map[j] == i) { 1158 mapped = 1; 1159 con2fb_map[j] = -1; 1160 } 1161 } 1162 1163 if (mapped) 1164 fbcon_release(info); 1165 } 1166 } 1167 1168 static void fbcon_deinit(struct vc_data *vc) 1169 { 1170 struct fbcon_display *p = &fb_display[vc->vc_num]; 1171 struct fb_info *info; 1172 struct fbcon_ops *ops; 1173 int idx; 1174 1175 fbcon_free_font(p); 1176 idx = con2fb_map[vc->vc_num]; 1177 1178 if (idx == -1) 1179 goto finished; 1180 1181 info = fbcon_registered_fb[idx]; 1182 1183 if (!info) 1184 goto finished; 1185 1186 ops = info->fbcon_par; 1187 1188 if (!ops) 1189 goto finished; 1190 1191 if (con_is_visible(vc)) 1192 fbcon_del_cursor_work(info); 1193 1194 ops->initialized = false; 1195 finished: 1196 1197 fbcon_free_font(p); 1198 vc->vc_font.data = NULL; 1199 1200 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1201 set_vc_hi_font(vc, false); 1202 1203 if (!con_is_bound(&fb_con)) 1204 fbcon_release_all(); 1205 1206 if (vc->vc_num == logo_shown) 1207 logo_shown = FBCON_LOGO_CANSHOW; 1208 1209 return; 1210 } 1211 1212 /* ====================================================================== */ 1213 1214 /* fbcon_XXX routines - interface used by the world 1215 * 1216 * This system is now divided into two levels because of complications 1217 * caused by hardware scrolling. Top level functions: 1218 * 1219 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1220 * 1221 * handles y values in range [0, scr_height-1] that correspond to real 1222 * screen positions. y_wrap shift means that first line of bitmap may be 1223 * anywhere on this display. These functions convert lineoffsets to 1224 * bitmap offsets and deal with the wrap-around case by splitting blits. 1225 * 1226 * fbcon_bmove_physical_8() -- These functions fast implementations 1227 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1228 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1229 * 1230 * WARNING: 1231 * 1232 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1233 * Implies should only really hardware scroll in rows. Only reason for 1234 * restriction is simplicity & efficiency at the moment. 1235 */ 1236 1237 static void __fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1238 unsigned int height, unsigned int width) 1239 { 1240 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1241 struct fbcon_ops *ops = info->fbcon_par; 1242 1243 struct fbcon_display *p = &fb_display[vc->vc_num]; 1244 u_int y_break; 1245 1246 if (fbcon_is_inactive(vc, info)) 1247 return; 1248 1249 if (!height || !width) 1250 return; 1251 1252 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1253 vc->vc_top = 0; 1254 /* 1255 * If the font dimensions are not an integral of the display 1256 * dimensions then the ops->clear below won't end up clearing 1257 * the margins. Call clear_margins here in case the logo 1258 * bitmap stretched into the margin area. 1259 */ 1260 fbcon_clear_margins(vc, 0); 1261 } 1262 1263 /* Split blits that cross physical y_wrap boundary */ 1264 1265 y_break = p->vrows - p->yscroll; 1266 if (sy < y_break && sy + height - 1 >= y_break) { 1267 u_int b = y_break - sy; 1268 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1269 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1270 width); 1271 } else 1272 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1273 } 1274 1275 static void fbcon_clear(struct vc_data *vc, unsigned int sy, unsigned int sx, 1276 unsigned int width) 1277 { 1278 __fbcon_clear(vc, sy, sx, 1, width); 1279 } 1280 1281 static void fbcon_putcs(struct vc_data *vc, const u16 *s, unsigned int count, 1282 unsigned int ypos, unsigned int xpos) 1283 { 1284 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1285 struct fbcon_display *p = &fb_display[vc->vc_num]; 1286 struct fbcon_ops *ops = info->fbcon_par; 1287 1288 if (!fbcon_is_inactive(vc, info)) 1289 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1290 get_color(vc, info, scr_readw(s), 1), 1291 get_color(vc, info, scr_readw(s), 0)); 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, bool enable) 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 = enable; 1320 1321 if (!ops->cursor) 1322 return; 1323 1324 ops->cursor(vc, info, enable, 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, false); 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, bool from_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 bool 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 false; 2182 } 2183 return true; 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 bool fbcon_blank(struct vc_data *vc, enum vesa_blank_mode blank, 2202 bool mode_switch) 2203 { 2204 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2205 struct fbcon_ops *ops = info->fbcon_par; 2206 2207 if (mode_switch) { 2208 struct fb_var_screeninfo var = info->var; 2209 2210 ops->graphics = 1; 2211 2212 if (!blank) { 2213 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2214 FB_ACTIVATE_KD_TEXT; 2215 fb_set_var(info, &var); 2216 ops->graphics = 0; 2217 ops->var = info->var; 2218 } 2219 } 2220 2221 if (!fbcon_is_inactive(vc, info)) { 2222 if (ops->blank_state != blank) { 2223 ops->blank_state = blank; 2224 fbcon_cursor(vc, !blank); 2225 ops->cursor_flash = (!blank); 2226 2227 if (fb_blank(info, blank)) 2228 fbcon_generic_blank(vc, info, blank); 2229 } 2230 2231 if (!blank) 2232 update_screen(vc); 2233 } 2234 2235 if (mode_switch || fbcon_is_inactive(vc, info) || 2236 ops->blank_state != FB_BLANK_UNBLANK) 2237 fbcon_del_cursor_work(info); 2238 else 2239 fbcon_add_cursor_work(info); 2240 2241 return false; 2242 } 2243 2244 static void fbcon_debug_enter(struct vc_data *vc) 2245 { 2246 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2247 struct fbcon_ops *ops = info->fbcon_par; 2248 2249 ops->save_graphics = ops->graphics; 2250 ops->graphics = 0; 2251 if (info->fbops->fb_debug_enter) 2252 info->fbops->fb_debug_enter(info); 2253 fbcon_set_palette(vc, color_table); 2254 } 2255 2256 static void 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 } 2265 2266 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2267 { 2268 u8 *fontdata = vc->vc_font.data; 2269 u8 *data = font->data; 2270 int i, j; 2271 2272 font->width = vc->vc_font.width; 2273 font->height = vc->vc_font.height; 2274 if (font->height > vpitch) 2275 return -ENOSPC; 2276 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2277 if (!font->data) 2278 return 0; 2279 2280 if (font->width <= 8) { 2281 j = vc->vc_font.height; 2282 if (font->charcount * j > FNTSIZE(fontdata)) 2283 return -EINVAL; 2284 2285 for (i = 0; i < font->charcount; i++) { 2286 memcpy(data, fontdata, j); 2287 memset(data + j, 0, vpitch - j); 2288 data += vpitch; 2289 fontdata += j; 2290 } 2291 } else if (font->width <= 16) { 2292 j = vc->vc_font.height * 2; 2293 if (font->charcount * j > FNTSIZE(fontdata)) 2294 return -EINVAL; 2295 2296 for (i = 0; i < font->charcount; i++) { 2297 memcpy(data, fontdata, j); 2298 memset(data + j, 0, 2*vpitch - j); 2299 data += 2*vpitch; 2300 fontdata += j; 2301 } 2302 } else if (font->width <= 24) { 2303 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2304 return -EINVAL; 2305 2306 for (i = 0; i < font->charcount; i++) { 2307 for (j = 0; j < vc->vc_font.height; j++) { 2308 *data++ = fontdata[0]; 2309 *data++ = fontdata[1]; 2310 *data++ = fontdata[2]; 2311 fontdata += sizeof(u32); 2312 } 2313 memset(data, 0, 3 * (vpitch - j)); 2314 data += 3 * (vpitch - j); 2315 } 2316 } else { 2317 j = vc->vc_font.height * 4; 2318 if (font->charcount * j > FNTSIZE(fontdata)) 2319 return -EINVAL; 2320 2321 for (i = 0; i < font->charcount; i++) { 2322 memcpy(data, fontdata, j); 2323 memset(data + j, 0, 4 * vpitch - j); 2324 data += 4 * vpitch; 2325 fontdata += j; 2326 } 2327 } 2328 return 0; 2329 } 2330 2331 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2332 static void set_vc_hi_font(struct vc_data *vc, bool set) 2333 { 2334 if (!set) { 2335 vc->vc_hi_font_mask = 0; 2336 if (vc->vc_can_do_color) { 2337 vc->vc_complement_mask >>= 1; 2338 vc->vc_s_complement_mask >>= 1; 2339 } 2340 2341 /* ++Edmund: reorder the attribute bits */ 2342 if (vc->vc_can_do_color) { 2343 unsigned short *cp = 2344 (unsigned short *) vc->vc_origin; 2345 int count = vc->vc_screenbuf_size / 2; 2346 unsigned short c; 2347 for (; count > 0; count--, cp++) { 2348 c = scr_readw(cp); 2349 scr_writew(((c & 0xfe00) >> 1) | 2350 (c & 0xff), cp); 2351 } 2352 c = vc->vc_video_erase_char; 2353 vc->vc_video_erase_char = 2354 ((c & 0xfe00) >> 1) | (c & 0xff); 2355 vc->vc_attr >>= 1; 2356 } 2357 } else { 2358 vc->vc_hi_font_mask = 0x100; 2359 if (vc->vc_can_do_color) { 2360 vc->vc_complement_mask <<= 1; 2361 vc->vc_s_complement_mask <<= 1; 2362 } 2363 2364 /* ++Edmund: reorder the attribute bits */ 2365 { 2366 unsigned short *cp = 2367 (unsigned short *) vc->vc_origin; 2368 int count = vc->vc_screenbuf_size / 2; 2369 unsigned short c; 2370 for (; count > 0; count--, cp++) { 2371 unsigned short newc; 2372 c = scr_readw(cp); 2373 if (vc->vc_can_do_color) 2374 newc = 2375 ((c & 0xff00) << 1) | (c & 2376 0xff); 2377 else 2378 newc = c & ~0x100; 2379 scr_writew(newc, cp); 2380 } 2381 c = vc->vc_video_erase_char; 2382 if (vc->vc_can_do_color) { 2383 vc->vc_video_erase_char = 2384 ((c & 0xff00) << 1) | (c & 0xff); 2385 vc->vc_attr <<= 1; 2386 } else 2387 vc->vc_video_erase_char = c & ~0x100; 2388 } 2389 } 2390 } 2391 2392 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2393 const u8 * data, int userfont) 2394 { 2395 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2396 struct fbcon_ops *ops = info->fbcon_par; 2397 struct fbcon_display *p = &fb_display[vc->vc_num]; 2398 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2399 char *old_data = NULL; 2400 2401 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2402 if (p->userfont) 2403 old_data = vc->vc_font.data; 2404 vc->vc_font.data = (void *)(p->fontdata = data); 2405 old_userfont = p->userfont; 2406 if ((p->userfont = userfont)) 2407 REFCOUNT(data)++; 2408 2409 old_width = vc->vc_font.width; 2410 old_height = vc->vc_font.height; 2411 old_charcount = vc->vc_font.charcount; 2412 2413 vc->vc_font.width = w; 2414 vc->vc_font.height = h; 2415 vc->vc_font.charcount = charcount; 2416 if (vc->vc_hi_font_mask && charcount == 256) 2417 set_vc_hi_font(vc, false); 2418 else if (!vc->vc_hi_font_mask && charcount == 512) 2419 set_vc_hi_font(vc, true); 2420 2421 if (resize) { 2422 int cols, rows; 2423 2424 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2425 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2426 cols /= w; 2427 rows /= h; 2428 ret = vc_resize(vc, cols, rows); 2429 if (ret) 2430 goto err_out; 2431 } else if (con_is_visible(vc) 2432 && vc->vc_mode == KD_TEXT) { 2433 fbcon_clear_margins(vc, 0); 2434 update_screen(vc); 2435 } 2436 2437 if (old_data && (--REFCOUNT(old_data) == 0)) 2438 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2439 return 0; 2440 2441 err_out: 2442 p->fontdata = old_data; 2443 vc->vc_font.data = (void *)old_data; 2444 2445 if (userfont) { 2446 p->userfont = old_userfont; 2447 if (--REFCOUNT(data) == 0) 2448 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2449 } 2450 2451 vc->vc_font.width = old_width; 2452 vc->vc_font.height = old_height; 2453 vc->vc_font.charcount = old_charcount; 2454 2455 return ret; 2456 } 2457 2458 /* 2459 * User asked to set font; we are guaranteed that charcount does not exceed 512 2460 * but lets not assume that, since charcount of 512 is small for unicode support. 2461 */ 2462 2463 static int fbcon_set_font(struct vc_data *vc, const struct console_font *font, 2464 unsigned int vpitch, unsigned int flags) 2465 { 2466 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2467 unsigned charcount = font->charcount; 2468 int w = font->width; 2469 int h = font->height; 2470 int size; 2471 int i, csum; 2472 u8 *new_data, *data = font->data; 2473 int pitch = PITCH(font->width); 2474 2475 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2476 * If not this check should be changed to charcount < 256 */ 2477 if (charcount != 256 && charcount != 512) 2478 return -EINVAL; 2479 2480 /* font bigger than screen resolution ? */ 2481 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2482 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2483 return -EINVAL; 2484 2485 if (font->width > 32 || font->height > 32) 2486 return -EINVAL; 2487 2488 /* Make sure drawing engine can handle the font */ 2489 if (!(info->pixmap.blit_x & BIT(font->width - 1)) || 2490 !(info->pixmap.blit_y & BIT(font->height - 1))) 2491 return -EINVAL; 2492 2493 /* Make sure driver can handle the font length */ 2494 if (fbcon_invalid_charcount(info, charcount)) 2495 return -EINVAL; 2496 2497 size = CALC_FONTSZ(h, pitch, charcount); 2498 2499 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2500 2501 if (!new_data) 2502 return -ENOMEM; 2503 2504 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2505 2506 new_data += FONT_EXTRA_WORDS * sizeof(int); 2507 FNTSIZE(new_data) = size; 2508 REFCOUNT(new_data) = 0; /* usage counter */ 2509 for (i=0; i< charcount; i++) { 2510 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2511 } 2512 2513 /* Since linux has a nice crc32 function use it for counting font 2514 * checksums. */ 2515 csum = crc32(0, new_data, size); 2516 2517 FNTSUM(new_data) = csum; 2518 /* Check if the same font is on some other console already */ 2519 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2520 struct vc_data *tmp = vc_cons[i].d; 2521 2522 if (fb_display[i].userfont && 2523 fb_display[i].fontdata && 2524 FNTSUM(fb_display[i].fontdata) == csum && 2525 FNTSIZE(fb_display[i].fontdata) == size && 2526 tmp->vc_font.width == w && 2527 !memcmp(fb_display[i].fontdata, new_data, size)) { 2528 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2529 new_data = (u8 *)fb_display[i].fontdata; 2530 break; 2531 } 2532 } 2533 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2534 } 2535 2536 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, 2537 const 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 /* As we might be inside of softback, we may work with non-contiguous buffer, 2597 that's why we have to use a separate routine. */ 2598 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2599 { 2600 while (cnt--) { 2601 u16 a = scr_readw(p); 2602 if (!vc->vc_can_do_color) 2603 a ^= 0x0800; 2604 else if (vc->vc_hi_font_mask == 0x100) 2605 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2606 (((a) & 0x0e00) << 4); 2607 else 2608 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2609 (((a) & 0x0700) << 4); 2610 scr_writew(a, p++); 2611 } 2612 } 2613 2614 void fbcon_suspended(struct fb_info *info) 2615 { 2616 struct vc_data *vc = NULL; 2617 struct fbcon_ops *ops = info->fbcon_par; 2618 2619 if (!ops || ops->currcon < 0) 2620 return; 2621 vc = vc_cons[ops->currcon].d; 2622 2623 /* Clear cursor, restore saved data */ 2624 fbcon_cursor(vc, false); 2625 } 2626 2627 void fbcon_resumed(struct fb_info *info) 2628 { 2629 struct vc_data *vc; 2630 struct fbcon_ops *ops = info->fbcon_par; 2631 2632 if (!ops || ops->currcon < 0) 2633 return; 2634 vc = vc_cons[ops->currcon].d; 2635 2636 update_screen(vc); 2637 } 2638 2639 static void fbcon_modechanged(struct fb_info *info) 2640 { 2641 struct fbcon_ops *ops = info->fbcon_par; 2642 struct vc_data *vc; 2643 struct fbcon_display *p; 2644 int rows, cols; 2645 2646 if (!ops || ops->currcon < 0) 2647 return; 2648 vc = vc_cons[ops->currcon].d; 2649 if (vc->vc_mode != KD_TEXT || 2650 fbcon_info_from_console(ops->currcon) != info) 2651 return; 2652 2653 p = &fb_display[vc->vc_num]; 2654 set_blitting_type(vc, info); 2655 2656 if (con_is_visible(vc)) { 2657 var_to_display(p, &info->var, info); 2658 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2659 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2660 cols /= vc->vc_font.width; 2661 rows /= vc->vc_font.height; 2662 vc_resize(vc, cols, rows); 2663 updatescrollmode(p, info, vc); 2664 scrollback_max = 0; 2665 scrollback_current = 0; 2666 2667 if (!fbcon_is_inactive(vc, info)) { 2668 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2669 ops->update_start(info); 2670 } 2671 2672 fbcon_set_palette(vc, color_table); 2673 update_screen(vc); 2674 } 2675 } 2676 2677 static void fbcon_set_all_vcs(struct fb_info *info) 2678 { 2679 struct fbcon_ops *ops = info->fbcon_par; 2680 struct vc_data *vc; 2681 struct fbcon_display *p; 2682 int i, rows, cols, fg = -1; 2683 2684 if (!ops || ops->currcon < 0) 2685 return; 2686 2687 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2688 vc = vc_cons[i].d; 2689 if (!vc || vc->vc_mode != KD_TEXT || 2690 fbcon_info_from_console(i) != info) 2691 continue; 2692 2693 if (con_is_visible(vc)) { 2694 fg = i; 2695 continue; 2696 } 2697 2698 p = &fb_display[vc->vc_num]; 2699 set_blitting_type(vc, info); 2700 var_to_display(p, &info->var, info); 2701 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2702 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2703 cols /= vc->vc_font.width; 2704 rows /= vc->vc_font.height; 2705 vc_resize(vc, cols, rows); 2706 } 2707 2708 if (fg != -1) 2709 fbcon_modechanged(info); 2710 } 2711 2712 2713 void fbcon_update_vcs(struct fb_info *info, bool all) 2714 { 2715 if (all) 2716 fbcon_set_all_vcs(info); 2717 else 2718 fbcon_modechanged(info); 2719 } 2720 EXPORT_SYMBOL(fbcon_update_vcs); 2721 2722 /* let fbcon check if it supports a new screen resolution */ 2723 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2724 { 2725 struct fbcon_ops *ops = info->fbcon_par; 2726 struct vc_data *vc; 2727 unsigned int i; 2728 2729 WARN_CONSOLE_UNLOCKED(); 2730 2731 if (!ops) 2732 return 0; 2733 2734 /* prevent setting a screen size which is smaller than font size */ 2735 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2736 vc = vc_cons[i].d; 2737 if (!vc || vc->vc_mode != KD_TEXT || 2738 fbcon_info_from_console(i) != info) 2739 continue; 2740 2741 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2742 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2743 return -EINVAL; 2744 } 2745 2746 return 0; 2747 } 2748 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2749 2750 int fbcon_mode_deleted(struct fb_info *info, 2751 struct fb_videomode *mode) 2752 { 2753 struct fb_info *fb_info; 2754 struct fbcon_display *p; 2755 int i, j, found = 0; 2756 2757 /* before deletion, ensure that mode is not in use */ 2758 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2759 j = con2fb_map[i]; 2760 if (j == -1) 2761 continue; 2762 fb_info = fbcon_registered_fb[j]; 2763 if (fb_info != info) 2764 continue; 2765 p = &fb_display[i]; 2766 if (!p || !p->mode) 2767 continue; 2768 if (fb_mode_is_equal(p->mode, mode)) { 2769 found = 1; 2770 break; 2771 } 2772 } 2773 return found; 2774 } 2775 2776 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2777 static void fbcon_unbind(void) 2778 { 2779 int ret; 2780 2781 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2782 fbcon_is_default); 2783 2784 if (!ret) 2785 fbcon_has_console_bind = 0; 2786 } 2787 #else 2788 static inline void fbcon_unbind(void) {} 2789 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2790 2791 void fbcon_fb_unbind(struct fb_info *info) 2792 { 2793 int i, new_idx = -1; 2794 int idx = info->node; 2795 2796 console_lock(); 2797 2798 if (!fbcon_has_console_bind) { 2799 console_unlock(); 2800 return; 2801 } 2802 2803 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2804 if (con2fb_map[i] != idx && 2805 con2fb_map[i] != -1) { 2806 new_idx = con2fb_map[i]; 2807 break; 2808 } 2809 } 2810 2811 if (new_idx != -1) { 2812 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2813 if (con2fb_map[i] == idx) 2814 set_con2fb_map(i, new_idx, 0); 2815 } 2816 } else { 2817 struct fb_info *info = fbcon_registered_fb[idx]; 2818 2819 /* This is sort of like set_con2fb_map, except it maps 2820 * the consoles to no device and then releases the 2821 * oldinfo to free memory and cancel the cursor blink 2822 * timer. I can imagine this just becoming part of 2823 * set_con2fb_map where new_idx is -1 2824 */ 2825 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2826 if (con2fb_map[i] == idx) { 2827 con2fb_map[i] = -1; 2828 if (!search_fb_in_map(idx)) { 2829 con2fb_release_oldinfo(vc_cons[i].d, 2830 info, NULL); 2831 } 2832 } 2833 } 2834 fbcon_unbind(); 2835 } 2836 2837 console_unlock(); 2838 } 2839 2840 void fbcon_fb_unregistered(struct fb_info *info) 2841 { 2842 int i, idx; 2843 2844 console_lock(); 2845 2846 fbcon_registered_fb[info->node] = NULL; 2847 fbcon_num_registered_fb--; 2848 2849 if (deferred_takeover) { 2850 console_unlock(); 2851 return; 2852 } 2853 2854 idx = info->node; 2855 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2856 if (con2fb_map[i] == idx) 2857 con2fb_map[i] = -1; 2858 } 2859 2860 if (idx == info_idx) { 2861 info_idx = -1; 2862 2863 fbcon_for_each_registered_fb(i) { 2864 info_idx = i; 2865 break; 2866 } 2867 } 2868 2869 if (info_idx != -1) { 2870 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2871 if (con2fb_map[i] == -1) 2872 con2fb_map[i] = info_idx; 2873 } 2874 } 2875 2876 if (primary_device == idx) 2877 primary_device = -1; 2878 2879 if (!fbcon_num_registered_fb) 2880 do_unregister_con_driver(&fb_con); 2881 console_unlock(); 2882 } 2883 2884 void fbcon_remap_all(struct fb_info *info) 2885 { 2886 int i, idx = info->node; 2887 2888 console_lock(); 2889 if (deferred_takeover) { 2890 for (i = first_fb_vc; i <= last_fb_vc; i++) 2891 con2fb_map_boot[i] = idx; 2892 fbcon_map_override(); 2893 console_unlock(); 2894 return; 2895 } 2896 2897 for (i = first_fb_vc; i <= last_fb_vc; i++) 2898 set_con2fb_map(i, idx, 0); 2899 2900 if (con_is_bound(&fb_con)) { 2901 printk(KERN_INFO "fbcon: Remapping primary device, " 2902 "fb%i, to tty %i-%i\n", idx, 2903 first_fb_vc + 1, last_fb_vc + 1); 2904 info_idx = idx; 2905 } 2906 console_unlock(); 2907 } 2908 2909 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2910 static void fbcon_select_primary(struct fb_info *info) 2911 { 2912 if (!map_override && primary_device == -1 && 2913 fb_is_primary_device(info)) { 2914 int i; 2915 2916 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2917 info->fix.id, info->node); 2918 primary_device = info->node; 2919 2920 for (i = first_fb_vc; i <= last_fb_vc; i++) 2921 con2fb_map_boot[i] = primary_device; 2922 2923 if (con_is_bound(&fb_con)) { 2924 printk(KERN_INFO "fbcon: Remapping primary device, " 2925 "fb%i, to tty %i-%i\n", info->node, 2926 first_fb_vc + 1, last_fb_vc + 1); 2927 info_idx = primary_device; 2928 } 2929 } 2930 2931 } 2932 #else 2933 static inline void fbcon_select_primary(struct fb_info *info) 2934 { 2935 return; 2936 } 2937 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2938 2939 static bool lockless_register_fb; 2940 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2941 MODULE_PARM_DESC(lockless_register_fb, 2942 "Lockless framebuffer registration for debugging [default=off]"); 2943 2944 /* called with console_lock held */ 2945 static int do_fb_registered(struct fb_info *info) 2946 { 2947 int ret = 0, i, idx; 2948 2949 WARN_CONSOLE_UNLOCKED(); 2950 2951 fbcon_registered_fb[info->node] = info; 2952 fbcon_num_registered_fb++; 2953 2954 idx = info->node; 2955 fbcon_select_primary(info); 2956 2957 if (deferred_takeover) { 2958 pr_info("fbcon: Deferring console take-over\n"); 2959 return 0; 2960 } 2961 2962 if (info_idx == -1) { 2963 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2964 if (con2fb_map_boot[i] == idx) { 2965 info_idx = idx; 2966 break; 2967 } 2968 } 2969 2970 if (info_idx != -1) 2971 ret = do_fbcon_takeover(1); 2972 } else { 2973 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2974 if (con2fb_map_boot[i] == idx) 2975 set_con2fb_map(i, idx, 0); 2976 } 2977 } 2978 2979 return ret; 2980 } 2981 2982 int fbcon_fb_registered(struct fb_info *info) 2983 { 2984 int ret; 2985 2986 if (!lockless_register_fb) 2987 console_lock(); 2988 else 2989 atomic_inc(&ignore_console_lock_warning); 2990 2991 ret = do_fb_registered(info); 2992 2993 if (!lockless_register_fb) 2994 console_unlock(); 2995 else 2996 atomic_dec(&ignore_console_lock_warning); 2997 2998 return ret; 2999 } 3000 3001 void fbcon_fb_blanked(struct fb_info *info, int blank) 3002 { 3003 struct fbcon_ops *ops = info->fbcon_par; 3004 struct vc_data *vc; 3005 3006 if (!ops || ops->currcon < 0) 3007 return; 3008 3009 vc = vc_cons[ops->currcon].d; 3010 if (vc->vc_mode != KD_TEXT || 3011 fbcon_info_from_console(ops->currcon) != info) 3012 return; 3013 3014 if (con_is_visible(vc)) { 3015 if (blank) 3016 do_blank_screen(0); 3017 else 3018 do_unblank_screen(0); 3019 } 3020 ops->blank_state = blank; 3021 } 3022 3023 void fbcon_new_modelist(struct fb_info *info) 3024 { 3025 int i; 3026 struct vc_data *vc; 3027 struct fb_var_screeninfo var; 3028 const struct fb_videomode *mode; 3029 3030 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3031 if (fbcon_info_from_console(i) != info) 3032 continue; 3033 if (!fb_display[i].mode) 3034 continue; 3035 vc = vc_cons[i].d; 3036 display_to_var(&var, &fb_display[i]); 3037 mode = fb_find_nearest_mode(fb_display[i].mode, 3038 &info->modelist); 3039 fb_videomode_to_var(&var, mode); 3040 fbcon_set_disp(info, &var, vc->vc_num); 3041 } 3042 } 3043 3044 void fbcon_get_requirement(struct fb_info *info, 3045 struct fb_blit_caps *caps) 3046 { 3047 struct vc_data *vc; 3048 3049 if (caps->flags) { 3050 int i, charcnt; 3051 3052 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3053 vc = vc_cons[i].d; 3054 if (vc && vc->vc_mode == KD_TEXT && 3055 info->node == con2fb_map[i]) { 3056 caps->x |= 1 << (vc->vc_font.width - 1); 3057 caps->y |= 1 << (vc->vc_font.height - 1); 3058 charcnt = vc->vc_font.charcount; 3059 if (caps->len < charcnt) 3060 caps->len = charcnt; 3061 } 3062 } 3063 } else { 3064 vc = vc_cons[fg_console].d; 3065 3066 if (vc && vc->vc_mode == KD_TEXT && 3067 info->node == con2fb_map[fg_console]) { 3068 caps->x = 1 << (vc->vc_font.width - 1); 3069 caps->y = 1 << (vc->vc_font.height - 1); 3070 caps->len = vc->vc_font.charcount; 3071 } 3072 } 3073 } 3074 3075 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3076 { 3077 struct fb_con2fbmap con2fb; 3078 int ret; 3079 3080 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3081 return -EFAULT; 3082 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3083 return -EINVAL; 3084 if (con2fb.framebuffer >= FB_MAX) 3085 return -EINVAL; 3086 if (!fbcon_registered_fb[con2fb.framebuffer]) 3087 request_module("fb%d", con2fb.framebuffer); 3088 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3089 return -EINVAL; 3090 } 3091 3092 console_lock(); 3093 ret = set_con2fb_map(con2fb.console - 1, 3094 con2fb.framebuffer, 1); 3095 console_unlock(); 3096 3097 return ret; 3098 } 3099 3100 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3101 { 3102 struct fb_con2fbmap con2fb; 3103 3104 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3105 return -EFAULT; 3106 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3107 return -EINVAL; 3108 3109 console_lock(); 3110 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3111 console_unlock(); 3112 3113 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3114 } 3115 3116 /* 3117 * The console `switch' structure for the frame buffer based console 3118 */ 3119 3120 static const struct consw fb_con = { 3121 .owner = THIS_MODULE, 3122 .con_startup = fbcon_startup, 3123 .con_init = fbcon_init, 3124 .con_deinit = fbcon_deinit, 3125 .con_clear = fbcon_clear, 3126 .con_putcs = fbcon_putcs, 3127 .con_cursor = fbcon_cursor, 3128 .con_scroll = fbcon_scroll, 3129 .con_switch = fbcon_switch, 3130 .con_blank = fbcon_blank, 3131 .con_font_set = fbcon_set_font, 3132 .con_font_get = fbcon_get_font, 3133 .con_font_default = fbcon_set_def_font, 3134 .con_set_palette = fbcon_set_palette, 3135 .con_invert_region = fbcon_invert_region, 3136 .con_resize = fbcon_resize, 3137 .con_debug_enter = fbcon_debug_enter, 3138 .con_debug_leave = fbcon_debug_leave, 3139 }; 3140 3141 static ssize_t store_rotate(struct device *device, 3142 struct device_attribute *attr, const char *buf, 3143 size_t count) 3144 { 3145 struct fb_info *info; 3146 int rotate, idx; 3147 char **last = NULL; 3148 3149 console_lock(); 3150 idx = con2fb_map[fg_console]; 3151 3152 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3153 goto err; 3154 3155 info = fbcon_registered_fb[idx]; 3156 rotate = simple_strtoul(buf, last, 0); 3157 fbcon_rotate(info, rotate); 3158 err: 3159 console_unlock(); 3160 return count; 3161 } 3162 3163 static ssize_t store_rotate_all(struct device *device, 3164 struct device_attribute *attr,const char *buf, 3165 size_t count) 3166 { 3167 struct fb_info *info; 3168 int rotate, idx; 3169 char **last = NULL; 3170 3171 console_lock(); 3172 idx = con2fb_map[fg_console]; 3173 3174 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3175 goto err; 3176 3177 info = fbcon_registered_fb[idx]; 3178 rotate = simple_strtoul(buf, last, 0); 3179 fbcon_rotate_all(info, rotate); 3180 err: 3181 console_unlock(); 3182 return count; 3183 } 3184 3185 static ssize_t show_rotate(struct device *device, 3186 struct device_attribute *attr,char *buf) 3187 { 3188 struct fb_info *info; 3189 int rotate = 0, idx; 3190 3191 console_lock(); 3192 idx = con2fb_map[fg_console]; 3193 3194 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3195 goto err; 3196 3197 info = fbcon_registered_fb[idx]; 3198 rotate = fbcon_get_rotate(info); 3199 err: 3200 console_unlock(); 3201 return sysfs_emit(buf, "%d\n", rotate); 3202 } 3203 3204 static ssize_t show_cursor_blink(struct device *device, 3205 struct device_attribute *attr, char *buf) 3206 { 3207 struct fb_info *info; 3208 struct fbcon_ops *ops; 3209 int idx, blink = -1; 3210 3211 console_lock(); 3212 idx = con2fb_map[fg_console]; 3213 3214 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3215 goto err; 3216 3217 info = fbcon_registered_fb[idx]; 3218 ops = info->fbcon_par; 3219 3220 if (!ops) 3221 goto err; 3222 3223 blink = delayed_work_pending(&ops->cursor_work); 3224 err: 3225 console_unlock(); 3226 return sysfs_emit(buf, "%d\n", blink); 3227 } 3228 3229 static ssize_t store_cursor_blink(struct device *device, 3230 struct device_attribute *attr, 3231 const char *buf, size_t count) 3232 { 3233 struct fb_info *info; 3234 int blink, idx; 3235 char **last = NULL; 3236 3237 console_lock(); 3238 idx = con2fb_map[fg_console]; 3239 3240 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3241 goto err; 3242 3243 info = fbcon_registered_fb[idx]; 3244 3245 if (!info->fbcon_par) 3246 goto err; 3247 3248 blink = simple_strtoul(buf, last, 0); 3249 3250 if (blink) { 3251 fbcon_cursor_noblink = 0; 3252 fbcon_add_cursor_work(info); 3253 } else { 3254 fbcon_cursor_noblink = 1; 3255 fbcon_del_cursor_work(info); 3256 } 3257 3258 err: 3259 console_unlock(); 3260 return count; 3261 } 3262 3263 static struct device_attribute device_attrs[] = { 3264 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3265 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3266 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3267 store_cursor_blink), 3268 }; 3269 3270 static int fbcon_init_device(void) 3271 { 3272 int i, error = 0; 3273 3274 fbcon_has_sysfs = 1; 3275 3276 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3277 error = device_create_file(fbcon_device, &device_attrs[i]); 3278 3279 if (error) 3280 break; 3281 } 3282 3283 if (error) { 3284 while (--i >= 0) 3285 device_remove_file(fbcon_device, &device_attrs[i]); 3286 3287 fbcon_has_sysfs = 0; 3288 } 3289 3290 return 0; 3291 } 3292 3293 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3294 static void fbcon_register_existing_fbs(struct work_struct *work) 3295 { 3296 int i; 3297 3298 console_lock(); 3299 3300 deferred_takeover = false; 3301 logo_shown = FBCON_LOGO_DONTSHOW; 3302 3303 fbcon_for_each_registered_fb(i) 3304 do_fb_registered(fbcon_registered_fb[i]); 3305 3306 console_unlock(); 3307 } 3308 3309 static struct notifier_block fbcon_output_nb; 3310 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3311 3312 static int fbcon_output_notifier(struct notifier_block *nb, 3313 unsigned long action, void *data) 3314 { 3315 WARN_CONSOLE_UNLOCKED(); 3316 3317 pr_info("fbcon: Taking over console\n"); 3318 3319 dummycon_unregister_output_notifier(&fbcon_output_nb); 3320 3321 /* We may get called in atomic context */ 3322 schedule_work(&fbcon_deferred_takeover_work); 3323 3324 return NOTIFY_OK; 3325 } 3326 #endif 3327 3328 static void fbcon_start(void) 3329 { 3330 WARN_CONSOLE_UNLOCKED(); 3331 3332 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3333 if (conswitchp != &dummy_con) 3334 deferred_takeover = false; 3335 3336 if (deferred_takeover) { 3337 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3338 dummycon_register_output_notifier(&fbcon_output_nb); 3339 return; 3340 } 3341 #endif 3342 } 3343 3344 void __init fb_console_init(void) 3345 { 3346 int i; 3347 3348 console_lock(); 3349 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3350 "fbcon"); 3351 3352 if (IS_ERR(fbcon_device)) { 3353 printk(KERN_WARNING "Unable to create device " 3354 "for fbcon; errno = %ld\n", 3355 PTR_ERR(fbcon_device)); 3356 fbcon_device = NULL; 3357 } else 3358 fbcon_init_device(); 3359 3360 for (i = 0; i < MAX_NR_CONSOLES; i++) 3361 con2fb_map[i] = -1; 3362 3363 fbcon_start(); 3364 console_unlock(); 3365 } 3366 3367 #ifdef MODULE 3368 3369 static void __exit fbcon_deinit_device(void) 3370 { 3371 int i; 3372 3373 if (fbcon_has_sysfs) { 3374 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3375 device_remove_file(fbcon_device, &device_attrs[i]); 3376 3377 fbcon_has_sysfs = 0; 3378 } 3379 } 3380 3381 void __exit fb_console_exit(void) 3382 { 3383 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3384 console_lock(); 3385 if (deferred_takeover) 3386 dummycon_unregister_output_notifier(&fbcon_output_nb); 3387 console_unlock(); 3388 3389 cancel_work_sync(&fbcon_deferred_takeover_work); 3390 #endif 3391 3392 console_lock(); 3393 fbcon_deinit_device(); 3394 device_destroy(fb_class, MKDEV(0, 0)); 3395 3396 do_unregister_con_driver(&fb_con); 3397 console_unlock(); 3398 } 3399 #endif 3400