1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/slab.h> 68 #include <linux/fb.h> 69 #include <linux/fbcon.h> 70 #include <linux/vt_kern.h> 71 #include <linux/selection.h> 72 #include <linux/font.h> 73 #include <linux/smp.h> 74 #include <linux/init.h> 75 #include <linux/interrupt.h> 76 #include <linux/crc32.h> /* For counting font checksums */ 77 #include <linux/uaccess.h> 78 #include <asm/fb.h> 79 #include <asm/irq.h> 80 81 #include "fbcon.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 90 * means concurrent access to the same fbdev from both fbcon and userspace 91 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 92 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 93 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 94 * fbmem.c cannot use locking asserts, and there's lots of callers which get 95 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 96 */ 97 98 enum { 99 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 100 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 101 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 102 }; 103 104 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 105 106 struct fb_info *fbcon_registered_fb[FB_MAX]; 107 int fbcon_num_registered_fb; 108 109 #define fbcon_for_each_registered_fb(i) \ 110 for (i = 0; WARN_CONSOLE_UNLOCKED(), i < FB_MAX; i++) \ 111 if (!fbcon_registered_fb[i]) {} else 112 113 static signed char con2fb_map[MAX_NR_CONSOLES]; 114 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 115 116 static struct fb_info *fbcon_info_from_console(int console) 117 { 118 WARN_CONSOLE_UNLOCKED(); 119 120 return fbcon_registered_fb[con2fb_map[console]]; 121 } 122 123 static int logo_lines; 124 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 125 enums. */ 126 static int logo_shown = FBCON_LOGO_CANSHOW; 127 /* console mappings */ 128 static 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 int mode; 355 int ret; 356 357 /* FIXME: we should sort out the unbind locking instead */ 358 /* instead we just fail to flash the cursor if we can't get 359 * the lock instead of blocking fbcon deinit */ 360 ret = console_trylock(); 361 if (ret == 0) 362 return; 363 364 /* protected by console_lock */ 365 info = ops->info; 366 367 if (ops->currcon != -1) 368 vc = vc_cons[ops->currcon].d; 369 370 if (!vc || !con_is_visible(vc) || 371 fbcon_info_from_console(vc->vc_num) != info || 372 vc->vc_deccm != 1) { 373 console_unlock(); 374 return; 375 } 376 377 c = scr_readw((u16 *) vc->vc_pos); 378 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 379 CM_ERASE : CM_DRAW; 380 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 381 get_color(vc, info, c, 0)); 382 console_unlock(); 383 384 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 385 ops->cur_blink_jiffies); 386 } 387 388 static void fbcon_add_cursor_work(struct fb_info *info) 389 { 390 struct fbcon_ops *ops = info->fbcon_par; 391 392 if (!fbcon_cursor_noblink) 393 queue_delayed_work(system_power_efficient_wq, &ops->cursor_work, 394 ops->cur_blink_jiffies); 395 } 396 397 static void fbcon_del_cursor_work(struct fb_info *info) 398 { 399 struct fbcon_ops *ops = info->fbcon_par; 400 401 cancel_delayed_work_sync(&ops->cursor_work); 402 } 403 404 #ifndef MODULE 405 static int __init fb_console_setup(char *this_opt) 406 { 407 char *options; 408 int i, j; 409 410 if (!this_opt || !*this_opt) 411 return 1; 412 413 while ((options = strsep(&this_opt, ",")) != NULL) { 414 if (!strncmp(options, "font:", 5)) { 415 strscpy(fontname, options + 5, sizeof(fontname)); 416 continue; 417 } 418 419 if (!strncmp(options, "scrollback:", 11)) { 420 pr_warn("Ignoring scrollback size option\n"); 421 continue; 422 } 423 424 if (!strncmp(options, "map:", 4)) { 425 options += 4; 426 if (*options) { 427 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 428 if (!options[j]) 429 j = 0; 430 con2fb_map_boot[i] = 431 (options[j++]-'0') % FB_MAX; 432 } 433 434 fbcon_map_override(); 435 } 436 continue; 437 } 438 439 if (!strncmp(options, "vc:", 3)) { 440 options += 3; 441 if (*options) 442 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 443 if (first_fb_vc >= MAX_NR_CONSOLES) 444 first_fb_vc = 0; 445 if (*options++ == '-') 446 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 447 if (last_fb_vc < first_fb_vc || last_fb_vc >= MAX_NR_CONSOLES) 448 last_fb_vc = MAX_NR_CONSOLES - 1; 449 fbcon_is_default = 0; 450 continue; 451 } 452 453 if (!strncmp(options, "rotate:", 7)) { 454 options += 7; 455 if (*options) 456 initial_rotation = simple_strtoul(options, &options, 0); 457 if (initial_rotation > 3) 458 initial_rotation = 0; 459 continue; 460 } 461 462 if (!strncmp(options, "margin:", 7)) { 463 options += 7; 464 if (*options) 465 margin_color = simple_strtoul(options, &options, 0); 466 continue; 467 } 468 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 469 if (!strcmp(options, "nodefer")) { 470 deferred_takeover = false; 471 continue; 472 } 473 #endif 474 475 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 } 489 return 1; 490 } 491 492 __setup("fbcon=", fb_console_setup); 493 #endif 494 495 static int search_fb_in_map(int idx) 496 { 497 int i, retval = 0; 498 499 for (i = first_fb_vc; i <= last_fb_vc; i++) { 500 if (con2fb_map[i] == idx) 501 retval = 1; 502 } 503 return retval; 504 } 505 506 static int search_for_mapped_con(void) 507 { 508 int i, retval = 0; 509 510 for (i = first_fb_vc; i <= last_fb_vc; i++) { 511 if (con2fb_map[i] != -1) 512 retval = 1; 513 } 514 return retval; 515 } 516 517 static int do_fbcon_takeover(int show_logo) 518 { 519 int err, i; 520 521 if (!fbcon_num_registered_fb) 522 return -ENODEV; 523 524 if (!show_logo) 525 logo_shown = FBCON_LOGO_DONTSHOW; 526 527 for (i = first_fb_vc; i <= last_fb_vc; i++) 528 con2fb_map[i] = info_idx; 529 530 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 531 fbcon_is_default); 532 533 if (err) { 534 for (i = first_fb_vc; i <= last_fb_vc; i++) 535 con2fb_map[i] = -1; 536 info_idx = -1; 537 } else { 538 fbcon_has_console_bind = 1; 539 } 540 541 return err; 542 } 543 544 #ifdef MODULE 545 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 546 int cols, int rows, int new_cols, int new_rows) 547 { 548 logo_shown = FBCON_LOGO_DONTSHOW; 549 } 550 #else 551 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 552 int cols, int rows, int new_cols, int new_rows) 553 { 554 /* Need to make room for the logo */ 555 struct fbcon_ops *ops = info->fbcon_par; 556 int cnt, erase = vc->vc_video_erase_char, step; 557 unsigned short *save = NULL, *r, *q; 558 int logo_height; 559 560 if (info->fbops->owner) { 561 logo_shown = FBCON_LOGO_DONTSHOW; 562 return; 563 } 564 565 /* 566 * remove underline attribute from erase character 567 * if black and white framebuffer. 568 */ 569 if (fb_get_color_depth(&info->var, &info->fix) == 1) 570 erase &= ~0x400; 571 logo_height = fb_prepare_logo(info, ops->rotate); 572 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 573 q = (unsigned short *) (vc->vc_origin + 574 vc->vc_size_row * rows); 575 step = logo_lines * cols; 576 for (r = q - logo_lines * cols; r < q; r++) 577 if (scr_readw(r) != vc->vc_video_erase_char) 578 break; 579 if (r != q && new_rows >= rows + logo_lines) { 580 save = kzalloc(array3_size(logo_lines, new_cols, 2), 581 GFP_KERNEL); 582 if (save) { 583 int i = min(cols, new_cols); 584 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 585 r = q - step; 586 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 587 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 588 r = q; 589 } 590 } 591 if (r == q) { 592 /* We can scroll screen down */ 593 r = q - step - cols; 594 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 595 scr_memcpyw(r + step, r, vc->vc_size_row); 596 r -= cols; 597 } 598 if (!save) { 599 int lines; 600 if (vc->state.y + logo_lines >= rows) 601 lines = rows - vc->state.y - 1; 602 else 603 lines = logo_lines; 604 vc->state.y += lines; 605 vc->vc_pos += lines * vc->vc_size_row; 606 } 607 } 608 scr_memsetw((unsigned short *) vc->vc_origin, 609 erase, 610 vc->vc_size_row * logo_lines); 611 612 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 613 fbcon_clear_margins(vc, 0); 614 update_screen(vc); 615 } 616 617 if (save) { 618 q = (unsigned short *) (vc->vc_origin + 619 vc->vc_size_row * 620 rows); 621 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 622 vc->state.y += logo_lines; 623 vc->vc_pos += logo_lines * vc->vc_size_row; 624 kfree(save); 625 } 626 627 if (logo_shown == FBCON_LOGO_DONTSHOW) 628 return; 629 630 if (logo_lines > vc->vc_bottom) { 631 logo_shown = FBCON_LOGO_CANSHOW; 632 printk(KERN_INFO 633 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 634 } else { 635 logo_shown = FBCON_LOGO_DRAW; 636 vc->vc_top = logo_lines; 637 } 638 } 639 #endif /* MODULE */ 640 641 #ifdef CONFIG_FB_TILEBLITTING 642 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 643 { 644 struct fbcon_ops *ops = info->fbcon_par; 645 646 ops->p = &fb_display[vc->vc_num]; 647 648 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 649 fbcon_set_tileops(vc, info); 650 else { 651 fbcon_set_rotation(info); 652 fbcon_set_bitops(ops); 653 } 654 } 655 656 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 657 { 658 int err = 0; 659 660 if (info->flags & FBINFO_MISC_TILEBLITTING && 661 info->tileops->fb_get_tilemax(info) < charcount) 662 err = 1; 663 664 return err; 665 } 666 #else 667 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 668 { 669 struct fbcon_ops *ops = info->fbcon_par; 670 671 info->flags &= ~FBINFO_MISC_TILEBLITTING; 672 ops->p = &fb_display[vc->vc_num]; 673 fbcon_set_rotation(info); 674 fbcon_set_bitops(ops); 675 } 676 677 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 678 { 679 return 0; 680 } 681 682 #endif /* CONFIG_MISC_TILEBLITTING */ 683 684 static void fbcon_release(struct fb_info *info) 685 { 686 lock_fb_info(info); 687 if (info->fbops->fb_release) 688 info->fbops->fb_release(info, 0); 689 unlock_fb_info(info); 690 691 module_put(info->fbops->owner); 692 693 if (info->fbcon_par) { 694 struct fbcon_ops *ops = info->fbcon_par; 695 696 fbcon_del_cursor_work(info); 697 kfree(ops->cursor_state.mask); 698 kfree(ops->cursor_data); 699 kfree(ops->cursor_src); 700 kfree(ops->fontbuffer); 701 kfree(info->fbcon_par); 702 info->fbcon_par = NULL; 703 } 704 } 705 706 static int fbcon_open(struct fb_info *info) 707 { 708 struct fbcon_ops *ops; 709 710 if (!try_module_get(info->fbops->owner)) 711 return -ENODEV; 712 713 lock_fb_info(info); 714 if (info->fbops->fb_open && 715 info->fbops->fb_open(info, 0)) { 716 unlock_fb_info(info); 717 module_put(info->fbops->owner); 718 return -ENODEV; 719 } 720 unlock_fb_info(info); 721 722 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 723 if (!ops) { 724 fbcon_release(info); 725 return -ENOMEM; 726 } 727 728 INIT_DELAYED_WORK(&ops->cursor_work, fb_flashcursor); 729 ops->info = info; 730 info->fbcon_par = ops; 731 ops->cur_blink_jiffies = HZ / 5; 732 733 return 0; 734 } 735 736 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 737 int unit) 738 { 739 int err; 740 741 err = fbcon_open(info); 742 if (err) 743 return err; 744 745 if (vc) 746 set_blitting_type(vc, info); 747 748 return err; 749 } 750 751 static void con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 752 struct fb_info *newinfo) 753 { 754 int ret; 755 756 fbcon_release(oldinfo); 757 758 /* 759 If oldinfo and newinfo are driving the same hardware, 760 the fb_release() method of oldinfo may attempt to 761 restore the hardware state. This will leave the 762 newinfo in an undefined state. Thus, a call to 763 fb_set_par() may be needed for the newinfo. 764 */ 765 if (newinfo && newinfo->fbops->fb_set_par) { 766 ret = newinfo->fbops->fb_set_par(newinfo); 767 768 if (ret) 769 printk(KERN_ERR "con2fb_release_oldinfo: " 770 "detected unhandled fb_set_par error, " 771 "error code %d\n", ret); 772 } 773 } 774 775 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 776 int unit, int show_logo) 777 { 778 struct fbcon_ops *ops = info->fbcon_par; 779 int ret; 780 781 ops->currcon = fg_console; 782 783 if (info->fbops->fb_set_par && !ops->initialized) { 784 ret = info->fbops->fb_set_par(info); 785 786 if (ret) 787 printk(KERN_ERR "con2fb_init_display: detected " 788 "unhandled fb_set_par error, " 789 "error code %d\n", ret); 790 } 791 792 ops->initialized = true; 793 ops->graphics = 0; 794 fbcon_set_disp(info, &info->var, unit); 795 796 if (show_logo) { 797 struct vc_data *fg_vc = vc_cons[fg_console].d; 798 struct fb_info *fg_info = 799 fbcon_info_from_console(fg_console); 800 801 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 802 fg_vc->vc_rows, fg_vc->vc_cols, 803 fg_vc->vc_rows); 804 } 805 806 update_screen(vc_cons[fg_console].d); 807 } 808 809 /** 810 * set_con2fb_map - map console to frame buffer device 811 * @unit: virtual console number to map 812 * @newidx: frame buffer index to map virtual console to 813 * @user: user request 814 * 815 * Maps a virtual console @unit to a frame buffer device 816 * @newidx. 817 * 818 * This should be called with the console lock held. 819 */ 820 static int set_con2fb_map(int unit, int newidx, int user) 821 { 822 struct vc_data *vc = vc_cons[unit].d; 823 int oldidx = con2fb_map[unit]; 824 struct fb_info *info = fbcon_registered_fb[newidx]; 825 struct fb_info *oldinfo = NULL; 826 int found, err = 0, show_logo; 827 828 WARN_CONSOLE_UNLOCKED(); 829 830 if (oldidx == newidx) 831 return 0; 832 833 if (!info) 834 return -EINVAL; 835 836 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 837 info_idx = newidx; 838 return do_fbcon_takeover(0); 839 } 840 841 if (oldidx != -1) 842 oldinfo = fbcon_registered_fb[oldidx]; 843 844 found = search_fb_in_map(newidx); 845 846 if (!err && !found) { 847 err = con2fb_acquire_newinfo(vc, info, unit); 848 if (!err) 849 con2fb_map[unit] = newidx; 850 } 851 852 /* 853 * If old fb is not mapped to any of the consoles, 854 * fbcon should release it. 855 */ 856 if (!err && oldinfo && !search_fb_in_map(oldidx)) 857 con2fb_release_oldinfo(vc, oldinfo, info); 858 859 show_logo = (fg_console == 0 && !user && 860 logo_shown != FBCON_LOGO_DONTSHOW); 861 862 if (!found) 863 fbcon_add_cursor_work(info); 864 con2fb_map_boot[unit] = newidx; 865 con2fb_init_display(vc, info, unit, show_logo); 866 867 if (!search_fb_in_map(info_idx)) 868 info_idx = newidx; 869 870 return err; 871 } 872 873 /* 874 * Low Level Operations 875 */ 876 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 877 static int var_to_display(struct fbcon_display *disp, 878 struct fb_var_screeninfo *var, 879 struct fb_info *info) 880 { 881 disp->xres_virtual = var->xres_virtual; 882 disp->yres_virtual = var->yres_virtual; 883 disp->bits_per_pixel = var->bits_per_pixel; 884 disp->grayscale = var->grayscale; 885 disp->nonstd = var->nonstd; 886 disp->accel_flags = var->accel_flags; 887 disp->height = var->height; 888 disp->width = var->width; 889 disp->red = var->red; 890 disp->green = var->green; 891 disp->blue = var->blue; 892 disp->transp = var->transp; 893 disp->rotate = var->rotate; 894 disp->mode = fb_match_mode(var, &info->modelist); 895 if (disp->mode == NULL) 896 /* This should not happen */ 897 return -EINVAL; 898 return 0; 899 } 900 901 static void display_to_var(struct fb_var_screeninfo *var, 902 struct fbcon_display *disp) 903 { 904 fb_videomode_to_var(var, disp->mode); 905 var->xres_virtual = disp->xres_virtual; 906 var->yres_virtual = disp->yres_virtual; 907 var->bits_per_pixel = disp->bits_per_pixel; 908 var->grayscale = disp->grayscale; 909 var->nonstd = disp->nonstd; 910 var->accel_flags = disp->accel_flags; 911 var->height = disp->height; 912 var->width = disp->width; 913 var->red = disp->red; 914 var->green = disp->green; 915 var->blue = disp->blue; 916 var->transp = disp->transp; 917 var->rotate = disp->rotate; 918 } 919 920 static const char *fbcon_startup(void) 921 { 922 const char *display_desc = "frame buffer device"; 923 struct fbcon_display *p = &fb_display[fg_console]; 924 struct vc_data *vc = vc_cons[fg_console].d; 925 const struct font_desc *font = NULL; 926 struct fb_info *info = NULL; 927 struct fbcon_ops *ops; 928 int rows, cols; 929 930 /* 931 * If num_registered_fb is zero, this is a call for the dummy part. 932 * The frame buffer devices weren't initialized yet. 933 */ 934 if (!fbcon_num_registered_fb || info_idx == -1) 935 return display_desc; 936 /* 937 * Instead of blindly using registered_fb[0], we use info_idx, set by 938 * fbcon_fb_registered(); 939 */ 940 info = fbcon_registered_fb[info_idx]; 941 if (!info) 942 return NULL; 943 944 if (fbcon_open(info)) 945 return NULL; 946 947 ops = info->fbcon_par; 948 ops->currcon = -1; 949 ops->graphics = 1; 950 ops->cur_rotate = -1; 951 952 p->con_rotate = initial_rotation; 953 if (p->con_rotate == -1) 954 p->con_rotate = info->fbcon_rotate_hint; 955 if (p->con_rotate == -1) 956 p->con_rotate = FB_ROTATE_UR; 957 958 set_blitting_type(vc, info); 959 960 /* Setup default font */ 961 if (!p->fontdata) { 962 if (!fontname[0] || !(font = find_font(fontname))) 963 font = get_default_font(info->var.xres, 964 info->var.yres, 965 info->pixmap.blit_x, 966 info->pixmap.blit_y); 967 vc->vc_font.width = font->width; 968 vc->vc_font.height = font->height; 969 vc->vc_font.data = (void *)(p->fontdata = font->data); 970 vc->vc_font.charcount = font->charcount; 971 } 972 973 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 974 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 975 cols /= vc->vc_font.width; 976 rows /= vc->vc_font.height; 977 vc_resize(vc, cols, rows); 978 979 pr_debug("mode: %s\n", info->fix.id); 980 pr_debug("visual: %d\n", info->fix.visual); 981 pr_debug("res: %dx%d-%d\n", info->var.xres, 982 info->var.yres, 983 info->var.bits_per_pixel); 984 985 fbcon_add_cursor_work(info); 986 return display_desc; 987 } 988 989 static void fbcon_init(struct vc_data *vc, int init) 990 { 991 struct fb_info *info; 992 struct fbcon_ops *ops; 993 struct vc_data **default_mode = vc->vc_display_fg; 994 struct vc_data *svc = *default_mode; 995 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 996 int logo = 1, new_rows, new_cols, rows, cols; 997 int ret; 998 999 if (WARN_ON(info_idx == -1)) 1000 return; 1001 1002 if (con2fb_map[vc->vc_num] == -1) 1003 con2fb_map[vc->vc_num] = info_idx; 1004 1005 info = fbcon_info_from_console(vc->vc_num); 1006 1007 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1008 logo_shown = FBCON_LOGO_DONTSHOW; 1009 1010 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1011 (info->fix.type == FB_TYPE_TEXT)) 1012 logo = 0; 1013 1014 if (var_to_display(p, &info->var, info)) 1015 return; 1016 1017 if (!info->fbcon_par) 1018 con2fb_acquire_newinfo(vc, info, vc->vc_num); 1019 1020 /* If we are not the first console on this 1021 fb, copy the font from that console */ 1022 t = &fb_display[fg_console]; 1023 if (!p->fontdata) { 1024 if (t->fontdata) { 1025 struct vc_data *fvc = vc_cons[fg_console].d; 1026 1027 vc->vc_font.data = (void *)(p->fontdata = 1028 fvc->vc_font.data); 1029 vc->vc_font.width = fvc->vc_font.width; 1030 vc->vc_font.height = fvc->vc_font.height; 1031 vc->vc_font.charcount = fvc->vc_font.charcount; 1032 p->userfont = t->userfont; 1033 1034 if (p->userfont) 1035 REFCOUNT(p->fontdata)++; 1036 } else { 1037 const struct font_desc *font = NULL; 1038 1039 if (!fontname[0] || !(font = find_font(fontname))) 1040 font = get_default_font(info->var.xres, 1041 info->var.yres, 1042 info->pixmap.blit_x, 1043 info->pixmap.blit_y); 1044 vc->vc_font.width = font->width; 1045 vc->vc_font.height = font->height; 1046 vc->vc_font.data = (void *)(p->fontdata = font->data); 1047 vc->vc_font.charcount = font->charcount; 1048 } 1049 } 1050 1051 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1052 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1053 if (vc->vc_font.charcount == 256) { 1054 vc->vc_hi_font_mask = 0; 1055 } else { 1056 vc->vc_hi_font_mask = 0x100; 1057 if (vc->vc_can_do_color) 1058 vc->vc_complement_mask <<= 1; 1059 } 1060 1061 if (!*svc->uni_pagedict_loc) 1062 con_set_default_unimap(svc); 1063 if (!*vc->uni_pagedict_loc) 1064 con_copy_unimap(vc, svc); 1065 1066 ops = info->fbcon_par; 1067 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1068 1069 p->con_rotate = initial_rotation; 1070 if (p->con_rotate == -1) 1071 p->con_rotate = info->fbcon_rotate_hint; 1072 if (p->con_rotate == -1) 1073 p->con_rotate = FB_ROTATE_UR; 1074 1075 set_blitting_type(vc, info); 1076 1077 cols = vc->vc_cols; 1078 rows = vc->vc_rows; 1079 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1080 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1081 new_cols /= vc->vc_font.width; 1082 new_rows /= vc->vc_font.height; 1083 1084 /* 1085 * We must always set the mode. The mode of the previous console 1086 * driver could be in the same resolution but we are using different 1087 * hardware so we have to initialize the hardware. 1088 * 1089 * We need to do it in fbcon_init() to prevent screen corruption. 1090 */ 1091 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1092 if (info->fbops->fb_set_par && !ops->initialized) { 1093 ret = info->fbops->fb_set_par(info); 1094 1095 if (ret) 1096 printk(KERN_ERR "fbcon_init: detected " 1097 "unhandled fb_set_par error, " 1098 "error code %d\n", ret); 1099 } 1100 1101 ops->initialized = true; 1102 } 1103 1104 ops->graphics = 0; 1105 1106 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1107 if ((info->flags & FBINFO_HWACCEL_COPYAREA) && 1108 !(info->flags & FBINFO_HWACCEL_DISABLED)) 1109 p->scrollmode = SCROLL_MOVE; 1110 else /* default to something safe */ 1111 p->scrollmode = SCROLL_REDRAW; 1112 #endif 1113 1114 /* 1115 * ++guenther: console.c:vc_allocate() relies on initializing 1116 * vc_{cols,rows}, but we must not set those if we are only 1117 * resizing the console. 1118 */ 1119 if (init) { 1120 vc->vc_cols = new_cols; 1121 vc->vc_rows = new_rows; 1122 } else 1123 vc_resize(vc, new_cols, new_rows); 1124 1125 if (logo) 1126 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1127 1128 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1129 ops->rotate = FB_ROTATE_UR; 1130 set_blitting_type(vc, info); 1131 } 1132 1133 ops->p = &fb_display[fg_console]; 1134 } 1135 1136 static void fbcon_free_font(struct fbcon_display *p) 1137 { 1138 if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1139 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1140 p->fontdata = NULL; 1141 p->userfont = 0; 1142 } 1143 1144 static void set_vc_hi_font(struct vc_data *vc, bool set); 1145 1146 static void fbcon_release_all(void) 1147 { 1148 struct fb_info *info; 1149 int i, j, mapped; 1150 1151 fbcon_for_each_registered_fb(i) { 1152 mapped = 0; 1153 info = fbcon_registered_fb[i]; 1154 1155 for (j = first_fb_vc; j <= last_fb_vc; j++) { 1156 if (con2fb_map[j] == i) { 1157 mapped = 1; 1158 con2fb_map[j] = -1; 1159 } 1160 } 1161 1162 if (mapped) 1163 fbcon_release(info); 1164 } 1165 } 1166 1167 static void fbcon_deinit(struct vc_data *vc) 1168 { 1169 struct fbcon_display *p = &fb_display[vc->vc_num]; 1170 struct fb_info *info; 1171 struct fbcon_ops *ops; 1172 int idx; 1173 1174 fbcon_free_font(p); 1175 idx = con2fb_map[vc->vc_num]; 1176 1177 if (idx == -1) 1178 goto finished; 1179 1180 info = fbcon_registered_fb[idx]; 1181 1182 if (!info) 1183 goto finished; 1184 1185 ops = info->fbcon_par; 1186 1187 if (!ops) 1188 goto finished; 1189 1190 if (con_is_visible(vc)) 1191 fbcon_del_cursor_work(info); 1192 1193 ops->initialized = false; 1194 finished: 1195 1196 fbcon_free_font(p); 1197 vc->vc_font.data = NULL; 1198 1199 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1200 set_vc_hi_font(vc, false); 1201 1202 if (!con_is_bound(&fb_con)) 1203 fbcon_release_all(); 1204 1205 if (vc->vc_num == logo_shown) 1206 logo_shown = FBCON_LOGO_CANSHOW; 1207 1208 return; 1209 } 1210 1211 /* ====================================================================== */ 1212 1213 /* fbcon_XXX routines - interface used by the world 1214 * 1215 * This system is now divided into two levels because of complications 1216 * caused by hardware scrolling. Top level functions: 1217 * 1218 * fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1219 * 1220 * handles y values in range [0, scr_height-1] that correspond to real 1221 * screen positions. y_wrap shift means that first line of bitmap may be 1222 * anywhere on this display. These functions convert lineoffsets to 1223 * bitmap offsets and deal with the wrap-around case by splitting blits. 1224 * 1225 * fbcon_bmove_physical_8() -- These functions fast implementations 1226 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1227 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1228 * 1229 * WARNING: 1230 * 1231 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1232 * Implies should only really hardware scroll in rows. Only reason for 1233 * restriction is simplicity & efficiency at the moment. 1234 */ 1235 1236 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1237 int width) 1238 { 1239 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1240 struct fbcon_ops *ops = info->fbcon_par; 1241 1242 struct fbcon_display *p = &fb_display[vc->vc_num]; 1243 u_int y_break; 1244 1245 if (fbcon_is_inactive(vc, info)) 1246 return; 1247 1248 if (!height || !width) 1249 return; 1250 1251 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1252 vc->vc_top = 0; 1253 /* 1254 * If the font dimensions are not an integral of the display 1255 * dimensions then the ops->clear below won't end up clearing 1256 * the margins. Call clear_margins here in case the logo 1257 * bitmap stretched into the margin area. 1258 */ 1259 fbcon_clear_margins(vc, 0); 1260 } 1261 1262 /* Split blits that cross physical y_wrap boundary */ 1263 1264 y_break = p->vrows - p->yscroll; 1265 if (sy < y_break && sy + height - 1 >= y_break) { 1266 u_int b = y_break - sy; 1267 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1268 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1269 width); 1270 } else 1271 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1272 } 1273 1274 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1275 int count, int ypos, int xpos) 1276 { 1277 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1278 struct fbcon_display *p = &fb_display[vc->vc_num]; 1279 struct fbcon_ops *ops = info->fbcon_par; 1280 1281 if (!fbcon_is_inactive(vc, info)) 1282 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1283 get_color(vc, info, scr_readw(s), 1), 1284 get_color(vc, info, scr_readw(s), 0)); 1285 } 1286 1287 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1288 { 1289 unsigned short chr; 1290 1291 scr_writew(c, &chr); 1292 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1293 } 1294 1295 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1296 { 1297 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1298 struct fbcon_ops *ops = info->fbcon_par; 1299 1300 if (!fbcon_is_inactive(vc, info)) 1301 ops->clear_margins(vc, info, margin_color, bottom_only); 1302 } 1303 1304 static void fbcon_cursor(struct vc_data *vc, int mode) 1305 { 1306 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1307 struct fbcon_ops *ops = info->fbcon_par; 1308 int c = scr_readw((u16 *) vc->vc_pos); 1309 1310 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1311 1312 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1313 return; 1314 1315 if (vc->vc_cursor_type & CUR_SW) 1316 fbcon_del_cursor_work(info); 1317 else 1318 fbcon_add_cursor_work(info); 1319 1320 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1321 1322 if (!ops->cursor) 1323 return; 1324 1325 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1326 get_color(vc, info, c, 0)); 1327 } 1328 1329 static int scrollback_phys_max = 0; 1330 static int scrollback_max = 0; 1331 static int scrollback_current = 0; 1332 1333 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1334 int unit) 1335 { 1336 struct fbcon_display *p, *t; 1337 struct vc_data **default_mode, *vc; 1338 struct vc_data *svc; 1339 struct fbcon_ops *ops = info->fbcon_par; 1340 int rows, cols; 1341 1342 p = &fb_display[unit]; 1343 1344 if (var_to_display(p, var, info)) 1345 return; 1346 1347 vc = vc_cons[unit].d; 1348 1349 if (!vc) 1350 return; 1351 1352 default_mode = vc->vc_display_fg; 1353 svc = *default_mode; 1354 t = &fb_display[svc->vc_num]; 1355 1356 if (!vc->vc_font.data) { 1357 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1358 vc->vc_font.width = (*default_mode)->vc_font.width; 1359 vc->vc_font.height = (*default_mode)->vc_font.height; 1360 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1361 p->userfont = t->userfont; 1362 if (p->userfont) 1363 REFCOUNT(p->fontdata)++; 1364 } 1365 1366 var->activate = FB_ACTIVATE_NOW; 1367 info->var.activate = var->activate; 1368 var->yoffset = info->var.yoffset; 1369 var->xoffset = info->var.xoffset; 1370 fb_set_var(info, var); 1371 ops->var = info->var; 1372 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1373 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1374 if (vc->vc_font.charcount == 256) { 1375 vc->vc_hi_font_mask = 0; 1376 } else { 1377 vc->vc_hi_font_mask = 0x100; 1378 if (vc->vc_can_do_color) 1379 vc->vc_complement_mask <<= 1; 1380 } 1381 1382 if (!*svc->uni_pagedict_loc) 1383 con_set_default_unimap(svc); 1384 if (!*vc->uni_pagedict_loc) 1385 con_copy_unimap(vc, svc); 1386 1387 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1388 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1389 cols /= vc->vc_font.width; 1390 rows /= vc->vc_font.height; 1391 vc_resize(vc, cols, rows); 1392 1393 if (con_is_visible(vc)) { 1394 update_screen(vc); 1395 } 1396 } 1397 1398 static __inline__ void ywrap_up(struct vc_data *vc, int count) 1399 { 1400 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1401 struct fbcon_ops *ops = info->fbcon_par; 1402 struct fbcon_display *p = &fb_display[vc->vc_num]; 1403 1404 p->yscroll += count; 1405 if (p->yscroll >= p->vrows) /* Deal with wrap */ 1406 p->yscroll -= p->vrows; 1407 ops->var.xoffset = 0; 1408 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1409 ops->var.vmode |= FB_VMODE_YWRAP; 1410 ops->update_start(info); 1411 scrollback_max += count; 1412 if (scrollback_max > scrollback_phys_max) 1413 scrollback_max = scrollback_phys_max; 1414 scrollback_current = 0; 1415 } 1416 1417 static __inline__ void ywrap_down(struct vc_data *vc, int count) 1418 { 1419 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1420 struct fbcon_ops *ops = info->fbcon_par; 1421 struct fbcon_display *p = &fb_display[vc->vc_num]; 1422 1423 p->yscroll -= count; 1424 if (p->yscroll < 0) /* Deal with wrap */ 1425 p->yscroll += p->vrows; 1426 ops->var.xoffset = 0; 1427 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1428 ops->var.vmode |= FB_VMODE_YWRAP; 1429 ops->update_start(info); 1430 scrollback_max -= count; 1431 if (scrollback_max < 0) 1432 scrollback_max = 0; 1433 scrollback_current = 0; 1434 } 1435 1436 static __inline__ void ypan_up(struct vc_data *vc, int count) 1437 { 1438 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1439 struct fbcon_display *p = &fb_display[vc->vc_num]; 1440 struct fbcon_ops *ops = info->fbcon_par; 1441 1442 p->yscroll += count; 1443 if (p->yscroll > p->vrows - vc->vc_rows) { 1444 ops->bmove(vc, info, p->vrows - vc->vc_rows, 1445 0, 0, 0, vc->vc_rows, vc->vc_cols); 1446 p->yscroll -= p->vrows - vc->vc_rows; 1447 } 1448 1449 ops->var.xoffset = 0; 1450 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1451 ops->var.vmode &= ~FB_VMODE_YWRAP; 1452 ops->update_start(info); 1453 fbcon_clear_margins(vc, 1); 1454 scrollback_max += count; 1455 if (scrollback_max > scrollback_phys_max) 1456 scrollback_max = scrollback_phys_max; 1457 scrollback_current = 0; 1458 } 1459 1460 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count) 1461 { 1462 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1463 struct fbcon_ops *ops = info->fbcon_par; 1464 struct fbcon_display *p = &fb_display[vc->vc_num]; 1465 1466 p->yscroll += count; 1467 1468 if (p->yscroll > p->vrows - vc->vc_rows) { 1469 p->yscroll -= p->vrows - vc->vc_rows; 1470 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t); 1471 } 1472 1473 ops->var.xoffset = 0; 1474 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1475 ops->var.vmode &= ~FB_VMODE_YWRAP; 1476 ops->update_start(info); 1477 fbcon_clear_margins(vc, 1); 1478 scrollback_max += count; 1479 if (scrollback_max > scrollback_phys_max) 1480 scrollback_max = scrollback_phys_max; 1481 scrollback_current = 0; 1482 } 1483 1484 static __inline__ void ypan_down(struct vc_data *vc, int count) 1485 { 1486 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1487 struct fbcon_display *p = &fb_display[vc->vc_num]; 1488 struct fbcon_ops *ops = info->fbcon_par; 1489 1490 p->yscroll -= count; 1491 if (p->yscroll < 0) { 1492 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows, 1493 0, vc->vc_rows, vc->vc_cols); 1494 p->yscroll += p->vrows - vc->vc_rows; 1495 } 1496 1497 ops->var.xoffset = 0; 1498 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1499 ops->var.vmode &= ~FB_VMODE_YWRAP; 1500 ops->update_start(info); 1501 fbcon_clear_margins(vc, 1); 1502 scrollback_max -= count; 1503 if (scrollback_max < 0) 1504 scrollback_max = 0; 1505 scrollback_current = 0; 1506 } 1507 1508 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count) 1509 { 1510 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1511 struct fbcon_ops *ops = info->fbcon_par; 1512 struct fbcon_display *p = &fb_display[vc->vc_num]; 1513 1514 p->yscroll -= count; 1515 1516 if (p->yscroll < 0) { 1517 p->yscroll += p->vrows - vc->vc_rows; 1518 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count); 1519 } 1520 1521 ops->var.xoffset = 0; 1522 ops->var.yoffset = p->yscroll * vc->vc_font.height; 1523 ops->var.vmode &= ~FB_VMODE_YWRAP; 1524 ops->update_start(info); 1525 fbcon_clear_margins(vc, 1); 1526 scrollback_max -= count; 1527 if (scrollback_max < 0) 1528 scrollback_max = 0; 1529 scrollback_current = 0; 1530 } 1531 1532 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p, 1533 int line, int count, int dy) 1534 { 1535 unsigned short *s = (unsigned short *) 1536 (vc->vc_origin + vc->vc_size_row * line); 1537 1538 while (count--) { 1539 unsigned short *start = s; 1540 unsigned short *le = advance_row(s, 1); 1541 unsigned short c; 1542 int x = 0; 1543 unsigned short attr = 1; 1544 1545 do { 1546 c = scr_readw(s); 1547 if (attr != (c & 0xff00)) { 1548 attr = c & 0xff00; 1549 if (s > start) { 1550 fbcon_putcs(vc, start, s - start, 1551 dy, x); 1552 x += s - start; 1553 start = s; 1554 } 1555 } 1556 console_conditional_schedule(); 1557 s++; 1558 } while (s < le); 1559 if (s > start) 1560 fbcon_putcs(vc, start, s - start, dy, x); 1561 console_conditional_schedule(); 1562 dy++; 1563 } 1564 } 1565 1566 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info, 1567 struct fbcon_display *p, int line, int count, int ycount) 1568 { 1569 int offset = ycount * vc->vc_cols; 1570 unsigned short *d = (unsigned short *) 1571 (vc->vc_origin + vc->vc_size_row * line); 1572 unsigned short *s = d + offset; 1573 struct fbcon_ops *ops = info->fbcon_par; 1574 1575 while (count--) { 1576 unsigned short *start = s; 1577 unsigned short *le = advance_row(s, 1); 1578 unsigned short c; 1579 int x = 0; 1580 1581 do { 1582 c = scr_readw(s); 1583 1584 if (c == scr_readw(d)) { 1585 if (s > start) { 1586 ops->bmove(vc, info, line + ycount, x, 1587 line, x, 1, s-start); 1588 x += s - start + 1; 1589 start = s + 1; 1590 } else { 1591 x++; 1592 start++; 1593 } 1594 } 1595 1596 scr_writew(c, d); 1597 console_conditional_schedule(); 1598 s++; 1599 d++; 1600 } while (s < le); 1601 if (s > start) 1602 ops->bmove(vc, info, line + ycount, x, line, x, 1, 1603 s-start); 1604 console_conditional_schedule(); 1605 if (ycount > 0) 1606 line++; 1607 else { 1608 line--; 1609 /* NOTE: We subtract two lines from these pointers */ 1610 s -= vc->vc_size_row; 1611 d -= vc->vc_size_row; 1612 } 1613 } 1614 } 1615 1616 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1617 int line, int count, int offset) 1618 { 1619 unsigned short *d = (unsigned short *) 1620 (vc->vc_origin + vc->vc_size_row * line); 1621 unsigned short *s = d + offset; 1622 1623 while (count--) { 1624 unsigned short *start = s; 1625 unsigned short *le = advance_row(s, 1); 1626 unsigned short c; 1627 int x = 0; 1628 unsigned short attr = 1; 1629 1630 do { 1631 c = scr_readw(s); 1632 if (attr != (c & 0xff00)) { 1633 attr = c & 0xff00; 1634 if (s > start) { 1635 fbcon_putcs(vc, start, s - start, 1636 line, x); 1637 x += s - start; 1638 start = s; 1639 } 1640 } 1641 if (c == scr_readw(d)) { 1642 if (s > start) { 1643 fbcon_putcs(vc, start, s - start, 1644 line, x); 1645 x += s - start + 1; 1646 start = s + 1; 1647 } else { 1648 x++; 1649 start++; 1650 } 1651 } 1652 scr_writew(c, d); 1653 console_conditional_schedule(); 1654 s++; 1655 d++; 1656 } while (s < le); 1657 if (s > start) 1658 fbcon_putcs(vc, start, s - start, line, x); 1659 console_conditional_schedule(); 1660 if (offset > 0) 1661 line++; 1662 else { 1663 line--; 1664 /* NOTE: We subtract two lines from these pointers */ 1665 s -= vc->vc_size_row; 1666 d -= vc->vc_size_row; 1667 } 1668 } 1669 } 1670 1671 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx, 1672 int dy, int dx, int height, int width, u_int y_break) 1673 { 1674 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1675 struct fbcon_ops *ops = info->fbcon_par; 1676 u_int b; 1677 1678 if (sy < y_break && sy + height > y_break) { 1679 b = y_break - sy; 1680 if (dy < sy) { /* Avoid trashing self */ 1681 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1682 y_break); 1683 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1684 height - b, width, y_break); 1685 } else { 1686 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1687 height - b, width, y_break); 1688 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1689 y_break); 1690 } 1691 return; 1692 } 1693 1694 if (dy < y_break && dy + height > y_break) { 1695 b = y_break - dy; 1696 if (dy < sy) { /* Avoid trashing self */ 1697 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1698 y_break); 1699 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1700 height - b, width, y_break); 1701 } else { 1702 fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx, 1703 height - b, width, y_break); 1704 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width, 1705 y_break); 1706 } 1707 return; 1708 } 1709 ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx, 1710 height, width); 1711 } 1712 1713 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx, 1714 int height, int width) 1715 { 1716 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1717 struct fbcon_display *p = &fb_display[vc->vc_num]; 1718 1719 if (fbcon_is_inactive(vc, info)) 1720 return; 1721 1722 if (!width || !height) 1723 return; 1724 1725 /* Split blits that cross physical y_wrap case. 1726 * Pathological case involves 4 blits, better to use recursive 1727 * code rather than unrolled case 1728 * 1729 * Recursive invocations don't need to erase the cursor over and 1730 * over again, so we use fbcon_bmove_rec() 1731 */ 1732 fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width, 1733 p->vrows - p->yscroll); 1734 } 1735 1736 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1737 enum con_scroll dir, unsigned int count) 1738 { 1739 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 1740 struct fbcon_display *p = &fb_display[vc->vc_num]; 1741 int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK; 1742 1743 if (fbcon_is_inactive(vc, info)) 1744 return true; 1745 1746 fbcon_cursor(vc, CM_ERASE); 1747 1748 /* 1749 * ++Geert: Only use ywrap/ypan if the console is in text mode 1750 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1751 * whole screen (prevents flicker). 1752 */ 1753 1754 switch (dir) { 1755 case SM_UP: 1756 if (count > vc->vc_rows) /* Maximum realistic size */ 1757 count = vc->vc_rows; 1758 switch (fb_scrollmode(p)) { 1759 case SCROLL_MOVE: 1760 fbcon_redraw_blit(vc, info, p, t, b - t - count, 1761 count); 1762 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1763 scr_memsetw((unsigned short *) (vc->vc_origin + 1764 vc->vc_size_row * 1765 (b - count)), 1766 vc->vc_video_erase_char, 1767 vc->vc_size_row * count); 1768 return true; 1769 1770 case SCROLL_WRAP_MOVE: 1771 if (b - t - count > 3 * vc->vc_rows >> 2) { 1772 if (t > 0) 1773 fbcon_bmove(vc, 0, 0, count, 0, t, 1774 vc->vc_cols); 1775 ywrap_up(vc, count); 1776 if (vc->vc_rows - b > 0) 1777 fbcon_bmove(vc, b - count, 0, b, 0, 1778 vc->vc_rows - b, 1779 vc->vc_cols); 1780 } else if (info->flags & FBINFO_READS_FAST) 1781 fbcon_bmove(vc, t + count, 0, t, 0, 1782 b - t - count, vc->vc_cols); 1783 else 1784 goto redraw_up; 1785 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1786 break; 1787 1788 case SCROLL_PAN_REDRAW: 1789 if ((p->yscroll + count <= 1790 2 * (p->vrows - vc->vc_rows)) 1791 && ((!scroll_partial && (b - t == vc->vc_rows)) 1792 || (scroll_partial 1793 && (b - t - count > 1794 3 * vc->vc_rows >> 2)))) { 1795 if (t > 0) 1796 fbcon_redraw_move(vc, p, 0, t, count); 1797 ypan_up_redraw(vc, t, count); 1798 if (vc->vc_rows - b > 0) 1799 fbcon_redraw_move(vc, p, b, 1800 vc->vc_rows - b, b); 1801 } else 1802 fbcon_redraw_move(vc, p, t + count, b - t - count, t); 1803 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1804 break; 1805 1806 case SCROLL_PAN_MOVE: 1807 if ((p->yscroll + count <= 1808 2 * (p->vrows - vc->vc_rows)) 1809 && ((!scroll_partial && (b - t == vc->vc_rows)) 1810 || (scroll_partial 1811 && (b - t - count > 1812 3 * vc->vc_rows >> 2)))) { 1813 if (t > 0) 1814 fbcon_bmove(vc, 0, 0, count, 0, t, 1815 vc->vc_cols); 1816 ypan_up(vc, count); 1817 if (vc->vc_rows - b > 0) 1818 fbcon_bmove(vc, b - count, 0, b, 0, 1819 vc->vc_rows - b, 1820 vc->vc_cols); 1821 } else if (info->flags & FBINFO_READS_FAST) 1822 fbcon_bmove(vc, t + count, 0, t, 0, 1823 b - t - count, vc->vc_cols); 1824 else 1825 goto redraw_up; 1826 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1827 break; 1828 1829 case SCROLL_REDRAW: 1830 redraw_up: 1831 fbcon_redraw(vc, p, t, b - t - count, 1832 count * vc->vc_cols); 1833 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1834 scr_memsetw((unsigned short *) (vc->vc_origin + 1835 vc->vc_size_row * 1836 (b - count)), 1837 vc->vc_video_erase_char, 1838 vc->vc_size_row * count); 1839 return true; 1840 } 1841 break; 1842 1843 case SM_DOWN: 1844 if (count > vc->vc_rows) /* Maximum realistic size */ 1845 count = vc->vc_rows; 1846 switch (fb_scrollmode(p)) { 1847 case SCROLL_MOVE: 1848 fbcon_redraw_blit(vc, info, p, b - 1, b - t - count, 1849 -count); 1850 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1851 scr_memsetw((unsigned short *) (vc->vc_origin + 1852 vc->vc_size_row * 1853 t), 1854 vc->vc_video_erase_char, 1855 vc->vc_size_row * count); 1856 return true; 1857 1858 case SCROLL_WRAP_MOVE: 1859 if (b - t - count > 3 * vc->vc_rows >> 2) { 1860 if (vc->vc_rows - b > 0) 1861 fbcon_bmove(vc, b, 0, b - count, 0, 1862 vc->vc_rows - b, 1863 vc->vc_cols); 1864 ywrap_down(vc, count); 1865 if (t > 0) 1866 fbcon_bmove(vc, count, 0, 0, 0, t, 1867 vc->vc_cols); 1868 } else if (info->flags & FBINFO_READS_FAST) 1869 fbcon_bmove(vc, t, 0, t + count, 0, 1870 b - t - count, vc->vc_cols); 1871 else 1872 goto redraw_down; 1873 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1874 break; 1875 1876 case SCROLL_PAN_MOVE: 1877 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1878 && ((!scroll_partial && (b - t == vc->vc_rows)) 1879 || (scroll_partial 1880 && (b - t - count > 1881 3 * vc->vc_rows >> 2)))) { 1882 if (vc->vc_rows - b > 0) 1883 fbcon_bmove(vc, b, 0, b - count, 0, 1884 vc->vc_rows - b, 1885 vc->vc_cols); 1886 ypan_down(vc, count); 1887 if (t > 0) 1888 fbcon_bmove(vc, count, 0, 0, 0, t, 1889 vc->vc_cols); 1890 } else if (info->flags & FBINFO_READS_FAST) 1891 fbcon_bmove(vc, t, 0, t + count, 0, 1892 b - t - count, vc->vc_cols); 1893 else 1894 goto redraw_down; 1895 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1896 break; 1897 1898 case SCROLL_PAN_REDRAW: 1899 if ((count - p->yscroll <= p->vrows - vc->vc_rows) 1900 && ((!scroll_partial && (b - t == vc->vc_rows)) 1901 || (scroll_partial 1902 && (b - t - count > 1903 3 * vc->vc_rows >> 2)))) { 1904 if (vc->vc_rows - b > 0) 1905 fbcon_redraw_move(vc, p, b, vc->vc_rows - b, 1906 b - count); 1907 ypan_down_redraw(vc, t, count); 1908 if (t > 0) 1909 fbcon_redraw_move(vc, p, count, t, 0); 1910 } else 1911 fbcon_redraw_move(vc, p, t, b - t - count, t + count); 1912 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1913 break; 1914 1915 case SCROLL_REDRAW: 1916 redraw_down: 1917 fbcon_redraw(vc, p, b - 1, b - t - count, 1918 -count * vc->vc_cols); 1919 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1920 scr_memsetw((unsigned short *) (vc->vc_origin + 1921 vc->vc_size_row * 1922 t), 1923 vc->vc_video_erase_char, 1924 vc->vc_size_row * count); 1925 return true; 1926 } 1927 } 1928 return false; 1929 } 1930 1931 1932 static void updatescrollmode_accel(struct fbcon_display *p, 1933 struct fb_info *info, 1934 struct vc_data *vc) 1935 { 1936 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION 1937 struct fbcon_ops *ops = info->fbcon_par; 1938 int cap = info->flags; 1939 u16 t = 0; 1940 int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep, 1941 info->fix.xpanstep); 1942 int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t); 1943 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1944 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1945 info->var.xres_virtual); 1946 int good_pan = (cap & FBINFO_HWACCEL_YPAN) && 1947 divides(ypan, vc->vc_font.height) && vyres > yres; 1948 int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) && 1949 divides(ywrap, vc->vc_font.height) && 1950 divides(vc->vc_font.height, vyres) && 1951 divides(vc->vc_font.height, yres); 1952 int reading_fast = cap & FBINFO_READS_FAST; 1953 int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) && 1954 !(cap & FBINFO_HWACCEL_DISABLED); 1955 int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) && 1956 !(cap & FBINFO_HWACCEL_DISABLED); 1957 1958 if (good_wrap || good_pan) { 1959 if (reading_fast || fast_copyarea) 1960 p->scrollmode = good_wrap ? 1961 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE; 1962 else 1963 p->scrollmode = good_wrap ? SCROLL_REDRAW : 1964 SCROLL_PAN_REDRAW; 1965 } else { 1966 if (reading_fast || (fast_copyarea && !fast_imageblit)) 1967 p->scrollmode = SCROLL_MOVE; 1968 else 1969 p->scrollmode = SCROLL_REDRAW; 1970 } 1971 #endif 1972 } 1973 1974 static void updatescrollmode(struct fbcon_display *p, 1975 struct fb_info *info, 1976 struct vc_data *vc) 1977 { 1978 struct fbcon_ops *ops = info->fbcon_par; 1979 int fh = vc->vc_font.height; 1980 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1981 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1982 info->var.xres_virtual); 1983 1984 p->vrows = vyres/fh; 1985 if (yres > (fh * (vc->vc_rows + 1))) 1986 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1987 if ((yres % fh) && (vyres % fh < yres % fh)) 1988 p->vrows--; 1989 1990 /* update scrollmode in case hardware acceleration is used */ 1991 updatescrollmode_accel(p, info, vc); 1992 } 1993 1994 #define PITCH(w) (((w) + 7) >> 3) 1995 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1996 1997 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1998 unsigned int height, unsigned int user) 1999 { 2000 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2001 struct fbcon_ops *ops = info->fbcon_par; 2002 struct fbcon_display *p = &fb_display[vc->vc_num]; 2003 struct fb_var_screeninfo var = info->var; 2004 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 2005 2006 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 2007 int size; 2008 int pitch = PITCH(vc->vc_font.width); 2009 2010 /* 2011 * If user font, ensure that a possible change to user font 2012 * height or width will not allow a font data out-of-bounds access. 2013 * NOTE: must use original charcount in calculation as font 2014 * charcount can change and cannot be used to determine the 2015 * font data allocated size. 2016 */ 2017 if (pitch <= 0) 2018 return -EINVAL; 2019 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 2020 if (size > FNTSIZE(vc->vc_font.data)) 2021 return -EINVAL; 2022 } 2023 2024 virt_w = FBCON_SWAP(ops->rotate, width, height); 2025 virt_h = FBCON_SWAP(ops->rotate, height, width); 2026 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 2027 vc->vc_font.height); 2028 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 2029 vc->vc_font.width); 2030 var.xres = virt_w * virt_fw; 2031 var.yres = virt_h * virt_fh; 2032 x_diff = info->var.xres - var.xres; 2033 y_diff = info->var.yres - var.yres; 2034 if (x_diff < 0 || x_diff > virt_fw || 2035 y_diff < 0 || y_diff > virt_fh) { 2036 const struct fb_videomode *mode; 2037 2038 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 2039 mode = fb_find_best_mode(&var, &info->modelist); 2040 if (mode == NULL) 2041 return -EINVAL; 2042 display_to_var(&var, p); 2043 fb_videomode_to_var(&var, mode); 2044 2045 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 2046 return -EINVAL; 2047 2048 pr_debug("resize now %ix%i\n", var.xres, var.yres); 2049 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 2050 var.activate = FB_ACTIVATE_NOW | 2051 FB_ACTIVATE_FORCE; 2052 fb_set_var(info, &var); 2053 } 2054 var_to_display(p, &info->var, info); 2055 ops->var = info->var; 2056 } 2057 updatescrollmode(p, info, vc); 2058 return 0; 2059 } 2060 2061 static int fbcon_switch(struct vc_data *vc) 2062 { 2063 struct fb_info *info, *old_info = NULL; 2064 struct fbcon_ops *ops; 2065 struct fbcon_display *p = &fb_display[vc->vc_num]; 2066 struct fb_var_screeninfo var; 2067 int i, ret, prev_console; 2068 2069 info = fbcon_info_from_console(vc->vc_num); 2070 ops = info->fbcon_par; 2071 2072 if (logo_shown >= 0) { 2073 struct vc_data *conp2 = vc_cons[logo_shown].d; 2074 2075 if (conp2->vc_top == logo_lines 2076 && conp2->vc_bottom == conp2->vc_rows) 2077 conp2->vc_top = 0; 2078 logo_shown = FBCON_LOGO_CANSHOW; 2079 } 2080 2081 prev_console = ops->currcon; 2082 if (prev_console != -1) 2083 old_info = fbcon_info_from_console(prev_console); 2084 /* 2085 * FIXME: If we have multiple fbdev's loaded, we need to 2086 * update all info->currcon. Perhaps, we can place this 2087 * in a centralized structure, but this might break some 2088 * drivers. 2089 * 2090 * info->currcon = vc->vc_num; 2091 */ 2092 fbcon_for_each_registered_fb(i) { 2093 if (fbcon_registered_fb[i]->fbcon_par) { 2094 struct fbcon_ops *o = fbcon_registered_fb[i]->fbcon_par; 2095 2096 o->currcon = vc->vc_num; 2097 } 2098 } 2099 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 2100 display_to_var(&var, p); 2101 var.activate = FB_ACTIVATE_NOW; 2102 2103 /* 2104 * make sure we don't unnecessarily trip the memcmp() 2105 * in fb_set_var() 2106 */ 2107 info->var.activate = var.activate; 2108 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 2109 fb_set_var(info, &var); 2110 ops->var = info->var; 2111 2112 if (old_info != NULL && (old_info != info || 2113 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 2114 if (info->fbops->fb_set_par) { 2115 ret = info->fbops->fb_set_par(info); 2116 2117 if (ret) 2118 printk(KERN_ERR "fbcon_switch: detected " 2119 "unhandled fb_set_par error, " 2120 "error code %d\n", ret); 2121 } 2122 2123 if (old_info != info) 2124 fbcon_del_cursor_work(old_info); 2125 } 2126 2127 if (fbcon_is_inactive(vc, info) || 2128 ops->blank_state != FB_BLANK_UNBLANK) 2129 fbcon_del_cursor_work(info); 2130 else 2131 fbcon_add_cursor_work(info); 2132 2133 set_blitting_type(vc, info); 2134 ops->cursor_reset = 1; 2135 2136 if (ops->rotate_font && ops->rotate_font(info, vc)) { 2137 ops->rotate = FB_ROTATE_UR; 2138 set_blitting_type(vc, info); 2139 } 2140 2141 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 2142 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 2143 2144 if (vc->vc_font.charcount > 256) 2145 vc->vc_complement_mask <<= 1; 2146 2147 updatescrollmode(p, info, vc); 2148 2149 switch (fb_scrollmode(p)) { 2150 case SCROLL_WRAP_MOVE: 2151 scrollback_phys_max = p->vrows - vc->vc_rows; 2152 break; 2153 case SCROLL_PAN_MOVE: 2154 case SCROLL_PAN_REDRAW: 2155 scrollback_phys_max = p->vrows - 2 * vc->vc_rows; 2156 if (scrollback_phys_max < 0) 2157 scrollback_phys_max = 0; 2158 break; 2159 default: 2160 scrollback_phys_max = 0; 2161 break; 2162 } 2163 2164 scrollback_max = 0; 2165 scrollback_current = 0; 2166 2167 if (!fbcon_is_inactive(vc, info)) { 2168 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2169 ops->update_start(info); 2170 } 2171 2172 fbcon_set_palette(vc, color_table); 2173 fbcon_clear_margins(vc, 0); 2174 2175 if (logo_shown == FBCON_LOGO_DRAW) { 2176 2177 logo_shown = fg_console; 2178 fb_show_logo(info, ops->rotate); 2179 update_region(vc, 2180 vc->vc_origin + vc->vc_size_row * vc->vc_top, 2181 vc->vc_size_row * (vc->vc_bottom - 2182 vc->vc_top) / 2); 2183 return 0; 2184 } 2185 return 1; 2186 } 2187 2188 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 2189 int blank) 2190 { 2191 if (blank) { 2192 unsigned short charmask = vc->vc_hi_font_mask ? 2193 0x1ff : 0xff; 2194 unsigned short oldc; 2195 2196 oldc = vc->vc_video_erase_char; 2197 vc->vc_video_erase_char &= charmask; 2198 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 2199 vc->vc_video_erase_char = oldc; 2200 } 2201 } 2202 2203 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 2204 { 2205 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2206 struct fbcon_ops *ops = info->fbcon_par; 2207 2208 if (mode_switch) { 2209 struct fb_var_screeninfo var = info->var; 2210 2211 ops->graphics = 1; 2212 2213 if (!blank) { 2214 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 2215 FB_ACTIVATE_KD_TEXT; 2216 fb_set_var(info, &var); 2217 ops->graphics = 0; 2218 ops->var = info->var; 2219 } 2220 } 2221 2222 if (!fbcon_is_inactive(vc, info)) { 2223 if (ops->blank_state != blank) { 2224 ops->blank_state = blank; 2225 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 2226 ops->cursor_flash = (!blank); 2227 2228 if (fb_blank(info, blank)) 2229 fbcon_generic_blank(vc, info, blank); 2230 } 2231 2232 if (!blank) 2233 update_screen(vc); 2234 } 2235 2236 if (mode_switch || fbcon_is_inactive(vc, info) || 2237 ops->blank_state != FB_BLANK_UNBLANK) 2238 fbcon_del_cursor_work(info); 2239 else 2240 fbcon_add_cursor_work(info); 2241 2242 return 0; 2243 } 2244 2245 static int fbcon_debug_enter(struct vc_data *vc) 2246 { 2247 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2248 struct fbcon_ops *ops = info->fbcon_par; 2249 2250 ops->save_graphics = ops->graphics; 2251 ops->graphics = 0; 2252 if (info->fbops->fb_debug_enter) 2253 info->fbops->fb_debug_enter(info); 2254 fbcon_set_palette(vc, color_table); 2255 return 0; 2256 } 2257 2258 static int fbcon_debug_leave(struct vc_data *vc) 2259 { 2260 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2261 struct fbcon_ops *ops = info->fbcon_par; 2262 2263 ops->graphics = ops->save_graphics; 2264 if (info->fbops->fb_debug_leave) 2265 info->fbops->fb_debug_leave(info); 2266 return 0; 2267 } 2268 2269 static int fbcon_get_font(struct vc_data *vc, struct console_font *font, unsigned int vpitch) 2270 { 2271 u8 *fontdata = vc->vc_font.data; 2272 u8 *data = font->data; 2273 int i, j; 2274 2275 font->width = vc->vc_font.width; 2276 font->height = vc->vc_font.height; 2277 if (font->height > vpitch) 2278 return -ENOSPC; 2279 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 2280 if (!font->data) 2281 return 0; 2282 2283 if (font->width <= 8) { 2284 j = vc->vc_font.height; 2285 if (font->charcount * j > FNTSIZE(fontdata)) 2286 return -EINVAL; 2287 2288 for (i = 0; i < font->charcount; i++) { 2289 memcpy(data, fontdata, j); 2290 memset(data + j, 0, vpitch - j); 2291 data += vpitch; 2292 fontdata += j; 2293 } 2294 } else if (font->width <= 16) { 2295 j = vc->vc_font.height * 2; 2296 if (font->charcount * j > FNTSIZE(fontdata)) 2297 return -EINVAL; 2298 2299 for (i = 0; i < font->charcount; i++) { 2300 memcpy(data, fontdata, j); 2301 memset(data + j, 0, 2*vpitch - j); 2302 data += 2*vpitch; 2303 fontdata += j; 2304 } 2305 } else if (font->width <= 24) { 2306 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 2307 return -EINVAL; 2308 2309 for (i = 0; i < font->charcount; i++) { 2310 for (j = 0; j < vc->vc_font.height; j++) { 2311 *data++ = fontdata[0]; 2312 *data++ = fontdata[1]; 2313 *data++ = fontdata[2]; 2314 fontdata += sizeof(u32); 2315 } 2316 memset(data, 0, 3 * (vpitch - j)); 2317 data += 3 * (vpitch - j); 2318 } 2319 } else { 2320 j = vc->vc_font.height * 4; 2321 if (font->charcount * j > FNTSIZE(fontdata)) 2322 return -EINVAL; 2323 2324 for (i = 0; i < font->charcount; i++) { 2325 memcpy(data, fontdata, j); 2326 memset(data + j, 0, 4 * vpitch - j); 2327 data += 4 * vpitch; 2328 fontdata += j; 2329 } 2330 } 2331 return 0; 2332 } 2333 2334 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 2335 static void set_vc_hi_font(struct vc_data *vc, bool set) 2336 { 2337 if (!set) { 2338 vc->vc_hi_font_mask = 0; 2339 if (vc->vc_can_do_color) { 2340 vc->vc_complement_mask >>= 1; 2341 vc->vc_s_complement_mask >>= 1; 2342 } 2343 2344 /* ++Edmund: reorder the attribute bits */ 2345 if (vc->vc_can_do_color) { 2346 unsigned short *cp = 2347 (unsigned short *) vc->vc_origin; 2348 int count = vc->vc_screenbuf_size / 2; 2349 unsigned short c; 2350 for (; count > 0; count--, cp++) { 2351 c = scr_readw(cp); 2352 scr_writew(((c & 0xfe00) >> 1) | 2353 (c & 0xff), cp); 2354 } 2355 c = vc->vc_video_erase_char; 2356 vc->vc_video_erase_char = 2357 ((c & 0xfe00) >> 1) | (c & 0xff); 2358 vc->vc_attr >>= 1; 2359 } 2360 } else { 2361 vc->vc_hi_font_mask = 0x100; 2362 if (vc->vc_can_do_color) { 2363 vc->vc_complement_mask <<= 1; 2364 vc->vc_s_complement_mask <<= 1; 2365 } 2366 2367 /* ++Edmund: reorder the attribute bits */ 2368 { 2369 unsigned short *cp = 2370 (unsigned short *) vc->vc_origin; 2371 int count = vc->vc_screenbuf_size / 2; 2372 unsigned short c; 2373 for (; count > 0; count--, cp++) { 2374 unsigned short newc; 2375 c = scr_readw(cp); 2376 if (vc->vc_can_do_color) 2377 newc = 2378 ((c & 0xff00) << 1) | (c & 2379 0xff); 2380 else 2381 newc = c & ~0x100; 2382 scr_writew(newc, cp); 2383 } 2384 c = vc->vc_video_erase_char; 2385 if (vc->vc_can_do_color) { 2386 vc->vc_video_erase_char = 2387 ((c & 0xff00) << 1) | (c & 0xff); 2388 vc->vc_attr <<= 1; 2389 } else 2390 vc->vc_video_erase_char = c & ~0x100; 2391 } 2392 } 2393 } 2394 2395 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 2396 const u8 * data, int userfont) 2397 { 2398 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2399 struct fbcon_ops *ops = info->fbcon_par; 2400 struct fbcon_display *p = &fb_display[vc->vc_num]; 2401 int resize, ret, old_userfont, old_width, old_height, old_charcount; 2402 char *old_data = NULL; 2403 2404 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 2405 if (p->userfont) 2406 old_data = vc->vc_font.data; 2407 vc->vc_font.data = (void *)(p->fontdata = data); 2408 old_userfont = p->userfont; 2409 if ((p->userfont = userfont)) 2410 REFCOUNT(data)++; 2411 2412 old_width = vc->vc_font.width; 2413 old_height = vc->vc_font.height; 2414 old_charcount = vc->vc_font.charcount; 2415 2416 vc->vc_font.width = w; 2417 vc->vc_font.height = h; 2418 vc->vc_font.charcount = charcount; 2419 if (vc->vc_hi_font_mask && charcount == 256) 2420 set_vc_hi_font(vc, false); 2421 else if (!vc->vc_hi_font_mask && charcount == 512) 2422 set_vc_hi_font(vc, true); 2423 2424 if (resize) { 2425 int cols, rows; 2426 2427 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2428 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2429 cols /= w; 2430 rows /= h; 2431 ret = vc_resize(vc, cols, rows); 2432 if (ret) 2433 goto err_out; 2434 } else if (con_is_visible(vc) 2435 && vc->vc_mode == KD_TEXT) { 2436 fbcon_clear_margins(vc, 0); 2437 update_screen(vc); 2438 } 2439 2440 if (old_data && (--REFCOUNT(old_data) == 0)) 2441 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 2442 return 0; 2443 2444 err_out: 2445 p->fontdata = old_data; 2446 vc->vc_font.data = (void *)old_data; 2447 2448 if (userfont) { 2449 p->userfont = old_userfont; 2450 if (--REFCOUNT(data) == 0) 2451 kfree(data - FONT_EXTRA_WORDS * sizeof(int)); 2452 } 2453 2454 vc->vc_font.width = old_width; 2455 vc->vc_font.height = old_height; 2456 vc->vc_font.charcount = old_charcount; 2457 2458 return ret; 2459 } 2460 2461 /* 2462 * User asked to set font; we are guaranteed that charcount does not exceed 512 2463 * but lets not assume that, since charcount of 512 is small for unicode support. 2464 */ 2465 2466 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 2467 unsigned int vpitch, unsigned int flags) 2468 { 2469 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2470 unsigned charcount = font->charcount; 2471 int w = font->width; 2472 int h = font->height; 2473 int size; 2474 int i, csum; 2475 u8 *new_data, *data = font->data; 2476 int pitch = PITCH(font->width); 2477 2478 /* Is there a reason why fbconsole couldn't handle any charcount >256? 2479 * If not this check should be changed to charcount < 256 */ 2480 if (charcount != 256 && charcount != 512) 2481 return -EINVAL; 2482 2483 /* font bigger than screen resolution ? */ 2484 if (w > FBCON_SWAP(info->var.rotate, info->var.xres, info->var.yres) || 2485 h > FBCON_SWAP(info->var.rotate, info->var.yres, info->var.xres)) 2486 return -EINVAL; 2487 2488 if (font->width > 32 || font->height > 32) 2489 return -EINVAL; 2490 2491 /* Make sure drawing engine can handle the font */ 2492 if (!(info->pixmap.blit_x & BIT(font->width - 1)) || 2493 !(info->pixmap.blit_y & BIT(font->height - 1))) 2494 return -EINVAL; 2495 2496 /* Make sure driver can handle the font length */ 2497 if (fbcon_invalid_charcount(info, charcount)) 2498 return -EINVAL; 2499 2500 size = CALC_FONTSZ(h, pitch, charcount); 2501 2502 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 2503 2504 if (!new_data) 2505 return -ENOMEM; 2506 2507 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 2508 2509 new_data += FONT_EXTRA_WORDS * sizeof(int); 2510 FNTSIZE(new_data) = size; 2511 REFCOUNT(new_data) = 0; /* usage counter */ 2512 for (i=0; i< charcount; i++) { 2513 memcpy(new_data + i*h*pitch, data + i*vpitch*pitch, h*pitch); 2514 } 2515 2516 /* Since linux has a nice crc32 function use it for counting font 2517 * checksums. */ 2518 csum = crc32(0, new_data, size); 2519 2520 FNTSUM(new_data) = csum; 2521 /* Check if the same font is on some other console already */ 2522 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2523 struct vc_data *tmp = vc_cons[i].d; 2524 2525 if (fb_display[i].userfont && 2526 fb_display[i].fontdata && 2527 FNTSUM(fb_display[i].fontdata) == csum && 2528 FNTSIZE(fb_display[i].fontdata) == size && 2529 tmp->vc_font.width == w && 2530 !memcmp(fb_display[i].fontdata, new_data, size)) { 2531 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2532 new_data = (u8 *)fb_display[i].fontdata; 2533 break; 2534 } 2535 } 2536 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2537 } 2538 2539 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2540 { 2541 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2542 const struct font_desc *f; 2543 2544 if (!name) 2545 f = get_default_font(info->var.xres, info->var.yres, 2546 info->pixmap.blit_x, info->pixmap.blit_y); 2547 else if (!(f = find_font(name))) 2548 return -ENOENT; 2549 2550 font->width = f->width; 2551 font->height = f->height; 2552 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2553 } 2554 2555 static u16 palette_red[16]; 2556 static u16 palette_green[16]; 2557 static u16 palette_blue[16]; 2558 2559 static struct fb_cmap palette_cmap = { 2560 0, 16, palette_red, palette_green, palette_blue, NULL 2561 }; 2562 2563 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2564 { 2565 struct fb_info *info = fbcon_info_from_console(vc->vc_num); 2566 int i, j, k, depth; 2567 u8 val; 2568 2569 if (fbcon_is_inactive(vc, info)) 2570 return; 2571 2572 if (!con_is_visible(vc)) 2573 return; 2574 2575 depth = fb_get_color_depth(&info->var, &info->fix); 2576 if (depth > 3) { 2577 for (i = j = 0; i < 16; i++) { 2578 k = table[i]; 2579 val = vc->vc_palette[j++]; 2580 palette_red[k] = (val << 8) | val; 2581 val = vc->vc_palette[j++]; 2582 palette_green[k] = (val << 8) | val; 2583 val = vc->vc_palette[j++]; 2584 palette_blue[k] = (val << 8) | val; 2585 } 2586 palette_cmap.len = 16; 2587 palette_cmap.start = 0; 2588 /* 2589 * If framebuffer is capable of less than 16 colors, 2590 * use default palette of fbcon. 2591 */ 2592 } else 2593 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2594 2595 fb_set_cmap(&palette_cmap, info); 2596 } 2597 2598 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2599 { 2600 return (u16 *) (vc->vc_origin + offset); 2601 } 2602 2603 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2604 int *px, int *py) 2605 { 2606 unsigned long ret; 2607 int x, y; 2608 2609 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2610 unsigned long offset = (pos - vc->vc_origin) / 2; 2611 2612 x = offset % vc->vc_cols; 2613 y = offset / vc->vc_cols; 2614 ret = pos + (vc->vc_cols - x) * 2; 2615 } else { 2616 /* Should not happen */ 2617 x = y = 0; 2618 ret = vc->vc_origin; 2619 } 2620 if (px) 2621 *px = x; 2622 if (py) 2623 *py = y; 2624 return ret; 2625 } 2626 2627 /* As we might be inside of softback, we may work with non-contiguous buffer, 2628 that's why we have to use a separate routine. */ 2629 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2630 { 2631 while (cnt--) { 2632 u16 a = scr_readw(p); 2633 if (!vc->vc_can_do_color) 2634 a ^= 0x0800; 2635 else if (vc->vc_hi_font_mask == 0x100) 2636 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2637 (((a) & 0x0e00) << 4); 2638 else 2639 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2640 (((a) & 0x0700) << 4); 2641 scr_writew(a, p++); 2642 } 2643 } 2644 2645 void fbcon_suspended(struct fb_info *info) 2646 { 2647 struct vc_data *vc = NULL; 2648 struct fbcon_ops *ops = info->fbcon_par; 2649 2650 if (!ops || ops->currcon < 0) 2651 return; 2652 vc = vc_cons[ops->currcon].d; 2653 2654 /* Clear cursor, restore saved data */ 2655 fbcon_cursor(vc, CM_ERASE); 2656 } 2657 2658 void fbcon_resumed(struct fb_info *info) 2659 { 2660 struct vc_data *vc; 2661 struct fbcon_ops *ops = info->fbcon_par; 2662 2663 if (!ops || ops->currcon < 0) 2664 return; 2665 vc = vc_cons[ops->currcon].d; 2666 2667 update_screen(vc); 2668 } 2669 2670 static void fbcon_modechanged(struct fb_info *info) 2671 { 2672 struct fbcon_ops *ops = info->fbcon_par; 2673 struct vc_data *vc; 2674 struct fbcon_display *p; 2675 int rows, cols; 2676 2677 if (!ops || ops->currcon < 0) 2678 return; 2679 vc = vc_cons[ops->currcon].d; 2680 if (vc->vc_mode != KD_TEXT || 2681 fbcon_info_from_console(ops->currcon) != info) 2682 return; 2683 2684 p = &fb_display[vc->vc_num]; 2685 set_blitting_type(vc, info); 2686 2687 if (con_is_visible(vc)) { 2688 var_to_display(p, &info->var, info); 2689 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2690 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2691 cols /= vc->vc_font.width; 2692 rows /= vc->vc_font.height; 2693 vc_resize(vc, cols, rows); 2694 updatescrollmode(p, info, vc); 2695 scrollback_max = 0; 2696 scrollback_current = 0; 2697 2698 if (!fbcon_is_inactive(vc, info)) { 2699 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2700 ops->update_start(info); 2701 } 2702 2703 fbcon_set_palette(vc, color_table); 2704 update_screen(vc); 2705 } 2706 } 2707 2708 static void fbcon_set_all_vcs(struct fb_info *info) 2709 { 2710 struct fbcon_ops *ops = info->fbcon_par; 2711 struct vc_data *vc; 2712 struct fbcon_display *p; 2713 int i, rows, cols, fg = -1; 2714 2715 if (!ops || ops->currcon < 0) 2716 return; 2717 2718 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2719 vc = vc_cons[i].d; 2720 if (!vc || vc->vc_mode != KD_TEXT || 2721 fbcon_info_from_console(i) != info) 2722 continue; 2723 2724 if (con_is_visible(vc)) { 2725 fg = i; 2726 continue; 2727 } 2728 2729 p = &fb_display[vc->vc_num]; 2730 set_blitting_type(vc, info); 2731 var_to_display(p, &info->var, info); 2732 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2733 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2734 cols /= vc->vc_font.width; 2735 rows /= vc->vc_font.height; 2736 vc_resize(vc, cols, rows); 2737 } 2738 2739 if (fg != -1) 2740 fbcon_modechanged(info); 2741 } 2742 2743 2744 void fbcon_update_vcs(struct fb_info *info, bool all) 2745 { 2746 if (all) 2747 fbcon_set_all_vcs(info); 2748 else 2749 fbcon_modechanged(info); 2750 } 2751 EXPORT_SYMBOL(fbcon_update_vcs); 2752 2753 /* let fbcon check if it supports a new screen resolution */ 2754 int fbcon_modechange_possible(struct fb_info *info, struct fb_var_screeninfo *var) 2755 { 2756 struct fbcon_ops *ops = info->fbcon_par; 2757 struct vc_data *vc; 2758 unsigned int i; 2759 2760 WARN_CONSOLE_UNLOCKED(); 2761 2762 if (!ops) 2763 return 0; 2764 2765 /* prevent setting a screen size which is smaller than font size */ 2766 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2767 vc = vc_cons[i].d; 2768 if (!vc || vc->vc_mode != KD_TEXT || 2769 fbcon_info_from_console(i) != info) 2770 continue; 2771 2772 if (vc->vc_font.width > FBCON_SWAP(var->rotate, var->xres, var->yres) || 2773 vc->vc_font.height > FBCON_SWAP(var->rotate, var->yres, var->xres)) 2774 return -EINVAL; 2775 } 2776 2777 return 0; 2778 } 2779 EXPORT_SYMBOL_GPL(fbcon_modechange_possible); 2780 2781 int fbcon_mode_deleted(struct fb_info *info, 2782 struct fb_videomode *mode) 2783 { 2784 struct fb_info *fb_info; 2785 struct fbcon_display *p; 2786 int i, j, found = 0; 2787 2788 /* before deletion, ensure that mode is not in use */ 2789 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2790 j = con2fb_map[i]; 2791 if (j == -1) 2792 continue; 2793 fb_info = fbcon_registered_fb[j]; 2794 if (fb_info != info) 2795 continue; 2796 p = &fb_display[i]; 2797 if (!p || !p->mode) 2798 continue; 2799 if (fb_mode_is_equal(p->mode, mode)) { 2800 found = 1; 2801 break; 2802 } 2803 } 2804 return found; 2805 } 2806 2807 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2808 static void fbcon_unbind(void) 2809 { 2810 int ret; 2811 2812 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2813 fbcon_is_default); 2814 2815 if (!ret) 2816 fbcon_has_console_bind = 0; 2817 } 2818 #else 2819 static inline void fbcon_unbind(void) {} 2820 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2821 2822 void fbcon_fb_unbind(struct fb_info *info) 2823 { 2824 int i, new_idx = -1; 2825 int idx = info->node; 2826 2827 console_lock(); 2828 2829 if (!fbcon_has_console_bind) { 2830 console_unlock(); 2831 return; 2832 } 2833 2834 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2835 if (con2fb_map[i] != idx && 2836 con2fb_map[i] != -1) { 2837 new_idx = con2fb_map[i]; 2838 break; 2839 } 2840 } 2841 2842 if (new_idx != -1) { 2843 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2844 if (con2fb_map[i] == idx) 2845 set_con2fb_map(i, new_idx, 0); 2846 } 2847 } else { 2848 struct fb_info *info = fbcon_registered_fb[idx]; 2849 2850 /* This is sort of like set_con2fb_map, except it maps 2851 * the consoles to no device and then releases the 2852 * oldinfo to free memory and cancel the cursor blink 2853 * timer. I can imagine this just becoming part of 2854 * set_con2fb_map where new_idx is -1 2855 */ 2856 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2857 if (con2fb_map[i] == idx) { 2858 con2fb_map[i] = -1; 2859 if (!search_fb_in_map(idx)) { 2860 con2fb_release_oldinfo(vc_cons[i].d, 2861 info, NULL); 2862 } 2863 } 2864 } 2865 fbcon_unbind(); 2866 } 2867 2868 console_unlock(); 2869 } 2870 2871 void fbcon_fb_unregistered(struct fb_info *info) 2872 { 2873 int i, idx; 2874 2875 console_lock(); 2876 2877 fbcon_registered_fb[info->node] = NULL; 2878 fbcon_num_registered_fb--; 2879 2880 if (deferred_takeover) { 2881 console_unlock(); 2882 return; 2883 } 2884 2885 idx = info->node; 2886 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2887 if (con2fb_map[i] == idx) 2888 con2fb_map[i] = -1; 2889 } 2890 2891 if (idx == info_idx) { 2892 info_idx = -1; 2893 2894 fbcon_for_each_registered_fb(i) { 2895 info_idx = i; 2896 break; 2897 } 2898 } 2899 2900 if (info_idx != -1) { 2901 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2902 if (con2fb_map[i] == -1) 2903 con2fb_map[i] = info_idx; 2904 } 2905 } 2906 2907 if (primary_device == idx) 2908 primary_device = -1; 2909 2910 if (!fbcon_num_registered_fb) 2911 do_unregister_con_driver(&fb_con); 2912 console_unlock(); 2913 } 2914 2915 void fbcon_remap_all(struct fb_info *info) 2916 { 2917 int i, idx = info->node; 2918 2919 console_lock(); 2920 if (deferred_takeover) { 2921 for (i = first_fb_vc; i <= last_fb_vc; i++) 2922 con2fb_map_boot[i] = idx; 2923 fbcon_map_override(); 2924 console_unlock(); 2925 return; 2926 } 2927 2928 for (i = first_fb_vc; i <= last_fb_vc; i++) 2929 set_con2fb_map(i, idx, 0); 2930 2931 if (con_is_bound(&fb_con)) { 2932 printk(KERN_INFO "fbcon: Remapping primary device, " 2933 "fb%i, to tty %i-%i\n", idx, 2934 first_fb_vc + 1, last_fb_vc + 1); 2935 info_idx = idx; 2936 } 2937 console_unlock(); 2938 } 2939 2940 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2941 static void fbcon_select_primary(struct fb_info *info) 2942 { 2943 if (!map_override && primary_device == -1 && 2944 fb_is_primary_device(info)) { 2945 int i; 2946 2947 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2948 info->fix.id, info->node); 2949 primary_device = info->node; 2950 2951 for (i = first_fb_vc; i <= last_fb_vc; i++) 2952 con2fb_map_boot[i] = primary_device; 2953 2954 if (con_is_bound(&fb_con)) { 2955 printk(KERN_INFO "fbcon: Remapping primary device, " 2956 "fb%i, to tty %i-%i\n", info->node, 2957 first_fb_vc + 1, last_fb_vc + 1); 2958 info_idx = primary_device; 2959 } 2960 } 2961 2962 } 2963 #else 2964 static inline void fbcon_select_primary(struct fb_info *info) 2965 { 2966 return; 2967 } 2968 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2969 2970 static bool lockless_register_fb; 2971 module_param_named_unsafe(lockless_register_fb, lockless_register_fb, bool, 0400); 2972 MODULE_PARM_DESC(lockless_register_fb, 2973 "Lockless framebuffer registration for debugging [default=off]"); 2974 2975 /* called with console_lock held */ 2976 static int do_fb_registered(struct fb_info *info) 2977 { 2978 int ret = 0, i, idx; 2979 2980 WARN_CONSOLE_UNLOCKED(); 2981 2982 fbcon_registered_fb[info->node] = info; 2983 fbcon_num_registered_fb++; 2984 2985 idx = info->node; 2986 fbcon_select_primary(info); 2987 2988 if (deferred_takeover) { 2989 pr_info("fbcon: Deferring console take-over\n"); 2990 return 0; 2991 } 2992 2993 if (info_idx == -1) { 2994 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2995 if (con2fb_map_boot[i] == idx) { 2996 info_idx = idx; 2997 break; 2998 } 2999 } 3000 3001 if (info_idx != -1) 3002 ret = do_fbcon_takeover(1); 3003 } else { 3004 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3005 if (con2fb_map_boot[i] == idx) 3006 set_con2fb_map(i, idx, 0); 3007 } 3008 } 3009 3010 return ret; 3011 } 3012 3013 int fbcon_fb_registered(struct fb_info *info) 3014 { 3015 int ret; 3016 3017 if (!lockless_register_fb) 3018 console_lock(); 3019 else 3020 atomic_inc(&ignore_console_lock_warning); 3021 3022 ret = do_fb_registered(info); 3023 3024 if (!lockless_register_fb) 3025 console_unlock(); 3026 else 3027 atomic_dec(&ignore_console_lock_warning); 3028 3029 return ret; 3030 } 3031 3032 void fbcon_fb_blanked(struct fb_info *info, int blank) 3033 { 3034 struct fbcon_ops *ops = info->fbcon_par; 3035 struct vc_data *vc; 3036 3037 if (!ops || ops->currcon < 0) 3038 return; 3039 3040 vc = vc_cons[ops->currcon].d; 3041 if (vc->vc_mode != KD_TEXT || 3042 fbcon_info_from_console(ops->currcon) != info) 3043 return; 3044 3045 if (con_is_visible(vc)) { 3046 if (blank) 3047 do_blank_screen(0); 3048 else 3049 do_unblank_screen(0); 3050 } 3051 ops->blank_state = blank; 3052 } 3053 3054 void fbcon_new_modelist(struct fb_info *info) 3055 { 3056 int i; 3057 struct vc_data *vc; 3058 struct fb_var_screeninfo var; 3059 const struct fb_videomode *mode; 3060 3061 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3062 if (fbcon_info_from_console(i) != info) 3063 continue; 3064 if (!fb_display[i].mode) 3065 continue; 3066 vc = vc_cons[i].d; 3067 display_to_var(&var, &fb_display[i]); 3068 mode = fb_find_nearest_mode(fb_display[i].mode, 3069 &info->modelist); 3070 fb_videomode_to_var(&var, mode); 3071 fbcon_set_disp(info, &var, vc->vc_num); 3072 } 3073 } 3074 3075 void fbcon_get_requirement(struct fb_info *info, 3076 struct fb_blit_caps *caps) 3077 { 3078 struct vc_data *vc; 3079 3080 if (caps->flags) { 3081 int i, charcnt; 3082 3083 for (i = first_fb_vc; i <= last_fb_vc; i++) { 3084 vc = vc_cons[i].d; 3085 if (vc && vc->vc_mode == KD_TEXT && 3086 info->node == con2fb_map[i]) { 3087 caps->x |= 1 << (vc->vc_font.width - 1); 3088 caps->y |= 1 << (vc->vc_font.height - 1); 3089 charcnt = vc->vc_font.charcount; 3090 if (caps->len < charcnt) 3091 caps->len = charcnt; 3092 } 3093 } 3094 } else { 3095 vc = vc_cons[fg_console].d; 3096 3097 if (vc && vc->vc_mode == KD_TEXT && 3098 info->node == con2fb_map[fg_console]) { 3099 caps->x = 1 << (vc->vc_font.width - 1); 3100 caps->y = 1 << (vc->vc_font.height - 1); 3101 caps->len = vc->vc_font.charcount; 3102 } 3103 } 3104 } 3105 3106 int fbcon_set_con2fb_map_ioctl(void __user *argp) 3107 { 3108 struct fb_con2fbmap con2fb; 3109 int ret; 3110 3111 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3112 return -EFAULT; 3113 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3114 return -EINVAL; 3115 if (con2fb.framebuffer >= FB_MAX) 3116 return -EINVAL; 3117 if (!fbcon_registered_fb[con2fb.framebuffer]) 3118 request_module("fb%d", con2fb.framebuffer); 3119 if (!fbcon_registered_fb[con2fb.framebuffer]) { 3120 return -EINVAL; 3121 } 3122 3123 console_lock(); 3124 ret = set_con2fb_map(con2fb.console - 1, 3125 con2fb.framebuffer, 1); 3126 console_unlock(); 3127 3128 return ret; 3129 } 3130 3131 int fbcon_get_con2fb_map_ioctl(void __user *argp) 3132 { 3133 struct fb_con2fbmap con2fb; 3134 3135 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 3136 return -EFAULT; 3137 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 3138 return -EINVAL; 3139 3140 console_lock(); 3141 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 3142 console_unlock(); 3143 3144 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 3145 } 3146 3147 /* 3148 * The console `switch' structure for the frame buffer based console 3149 */ 3150 3151 static const struct consw fb_con = { 3152 .owner = THIS_MODULE, 3153 .con_startup = fbcon_startup, 3154 .con_init = fbcon_init, 3155 .con_deinit = fbcon_deinit, 3156 .con_clear = fbcon_clear, 3157 .con_putc = fbcon_putc, 3158 .con_putcs = fbcon_putcs, 3159 .con_cursor = fbcon_cursor, 3160 .con_scroll = fbcon_scroll, 3161 .con_switch = fbcon_switch, 3162 .con_blank = fbcon_blank, 3163 .con_font_set = fbcon_set_font, 3164 .con_font_get = fbcon_get_font, 3165 .con_font_default = fbcon_set_def_font, 3166 .con_set_palette = fbcon_set_palette, 3167 .con_invert_region = fbcon_invert_region, 3168 .con_screen_pos = fbcon_screen_pos, 3169 .con_getxy = fbcon_getxy, 3170 .con_resize = fbcon_resize, 3171 .con_debug_enter = fbcon_debug_enter, 3172 .con_debug_leave = fbcon_debug_leave, 3173 }; 3174 3175 static ssize_t store_rotate(struct device *device, 3176 struct device_attribute *attr, const char *buf, 3177 size_t count) 3178 { 3179 struct fb_info *info; 3180 int rotate, idx; 3181 char **last = NULL; 3182 3183 console_lock(); 3184 idx = con2fb_map[fg_console]; 3185 3186 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3187 goto err; 3188 3189 info = fbcon_registered_fb[idx]; 3190 rotate = simple_strtoul(buf, last, 0); 3191 fbcon_rotate(info, rotate); 3192 err: 3193 console_unlock(); 3194 return count; 3195 } 3196 3197 static ssize_t store_rotate_all(struct device *device, 3198 struct device_attribute *attr,const char *buf, 3199 size_t count) 3200 { 3201 struct fb_info *info; 3202 int rotate, idx; 3203 char **last = NULL; 3204 3205 console_lock(); 3206 idx = con2fb_map[fg_console]; 3207 3208 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3209 goto err; 3210 3211 info = fbcon_registered_fb[idx]; 3212 rotate = simple_strtoul(buf, last, 0); 3213 fbcon_rotate_all(info, rotate); 3214 err: 3215 console_unlock(); 3216 return count; 3217 } 3218 3219 static ssize_t show_rotate(struct device *device, 3220 struct device_attribute *attr,char *buf) 3221 { 3222 struct fb_info *info; 3223 int rotate = 0, idx; 3224 3225 console_lock(); 3226 idx = con2fb_map[fg_console]; 3227 3228 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3229 goto err; 3230 3231 info = fbcon_registered_fb[idx]; 3232 rotate = fbcon_get_rotate(info); 3233 err: 3234 console_unlock(); 3235 return sysfs_emit(buf, "%d\n", rotate); 3236 } 3237 3238 static ssize_t show_cursor_blink(struct device *device, 3239 struct device_attribute *attr, char *buf) 3240 { 3241 struct fb_info *info; 3242 struct fbcon_ops *ops; 3243 int idx, blink = -1; 3244 3245 console_lock(); 3246 idx = con2fb_map[fg_console]; 3247 3248 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3249 goto err; 3250 3251 info = fbcon_registered_fb[idx]; 3252 ops = info->fbcon_par; 3253 3254 if (!ops) 3255 goto err; 3256 3257 blink = delayed_work_pending(&ops->cursor_work); 3258 err: 3259 console_unlock(); 3260 return sysfs_emit(buf, "%d\n", blink); 3261 } 3262 3263 static ssize_t store_cursor_blink(struct device *device, 3264 struct device_attribute *attr, 3265 const char *buf, size_t count) 3266 { 3267 struct fb_info *info; 3268 int blink, idx; 3269 char **last = NULL; 3270 3271 console_lock(); 3272 idx = con2fb_map[fg_console]; 3273 3274 if (idx == -1 || fbcon_registered_fb[idx] == NULL) 3275 goto err; 3276 3277 info = fbcon_registered_fb[idx]; 3278 3279 if (!info->fbcon_par) 3280 goto err; 3281 3282 blink = simple_strtoul(buf, last, 0); 3283 3284 if (blink) { 3285 fbcon_cursor_noblink = 0; 3286 fbcon_add_cursor_work(info); 3287 } else { 3288 fbcon_cursor_noblink = 1; 3289 fbcon_del_cursor_work(info); 3290 } 3291 3292 err: 3293 console_unlock(); 3294 return count; 3295 } 3296 3297 static struct device_attribute device_attrs[] = { 3298 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 3299 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 3300 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 3301 store_cursor_blink), 3302 }; 3303 3304 static int fbcon_init_device(void) 3305 { 3306 int i, error = 0; 3307 3308 fbcon_has_sysfs = 1; 3309 3310 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 3311 error = device_create_file(fbcon_device, &device_attrs[i]); 3312 3313 if (error) 3314 break; 3315 } 3316 3317 if (error) { 3318 while (--i >= 0) 3319 device_remove_file(fbcon_device, &device_attrs[i]); 3320 3321 fbcon_has_sysfs = 0; 3322 } 3323 3324 return 0; 3325 } 3326 3327 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3328 static void fbcon_register_existing_fbs(struct work_struct *work) 3329 { 3330 int i; 3331 3332 console_lock(); 3333 3334 deferred_takeover = false; 3335 logo_shown = FBCON_LOGO_DONTSHOW; 3336 3337 fbcon_for_each_registered_fb(i) 3338 do_fb_registered(fbcon_registered_fb[i]); 3339 3340 console_unlock(); 3341 } 3342 3343 static struct notifier_block fbcon_output_nb; 3344 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 3345 3346 static int fbcon_output_notifier(struct notifier_block *nb, 3347 unsigned long action, void *data) 3348 { 3349 WARN_CONSOLE_UNLOCKED(); 3350 3351 pr_info("fbcon: Taking over console\n"); 3352 3353 dummycon_unregister_output_notifier(&fbcon_output_nb); 3354 3355 /* We may get called in atomic context */ 3356 schedule_work(&fbcon_deferred_takeover_work); 3357 3358 return NOTIFY_OK; 3359 } 3360 #endif 3361 3362 static void fbcon_start(void) 3363 { 3364 WARN_CONSOLE_UNLOCKED(); 3365 3366 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3367 if (conswitchp != &dummy_con) 3368 deferred_takeover = false; 3369 3370 if (deferred_takeover) { 3371 fbcon_output_nb.notifier_call = fbcon_output_notifier; 3372 dummycon_register_output_notifier(&fbcon_output_nb); 3373 return; 3374 } 3375 #endif 3376 } 3377 3378 void __init fb_console_init(void) 3379 { 3380 int i; 3381 3382 console_lock(); 3383 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 3384 "fbcon"); 3385 3386 if (IS_ERR(fbcon_device)) { 3387 printk(KERN_WARNING "Unable to create device " 3388 "for fbcon; errno = %ld\n", 3389 PTR_ERR(fbcon_device)); 3390 fbcon_device = NULL; 3391 } else 3392 fbcon_init_device(); 3393 3394 for (i = 0; i < MAX_NR_CONSOLES; i++) 3395 con2fb_map[i] = -1; 3396 3397 fbcon_start(); 3398 console_unlock(); 3399 } 3400 3401 #ifdef MODULE 3402 3403 static void __exit fbcon_deinit_device(void) 3404 { 3405 int i; 3406 3407 if (fbcon_has_sysfs) { 3408 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 3409 device_remove_file(fbcon_device, &device_attrs[i]); 3410 3411 fbcon_has_sysfs = 0; 3412 } 3413 } 3414 3415 void __exit fb_console_exit(void) 3416 { 3417 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 3418 console_lock(); 3419 if (deferred_takeover) 3420 dummycon_unregister_output_notifier(&fbcon_output_nb); 3421 console_unlock(); 3422 3423 cancel_work_sync(&fbcon_deferred_takeover_work); 3424 #endif 3425 3426 console_lock(); 3427 fbcon_deinit_device(); 3428 device_destroy(fb_class, MKDEV(0, 0)); 3429 3430 do_unregister_con_driver(&fb_con); 3431 console_unlock(); 3432 } 3433 #endif 3434