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