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