1 /* 2 * linux/drivers/video/fbcon.c -- Low level frame buffer based console driver 3 * 4 * Copyright (C) 1995 Geert Uytterhoeven 5 * 6 * 7 * This file is based on the original Amiga console driver (amicon.c): 8 * 9 * Copyright (C) 1993 Hamish Macdonald 10 * Greg Harp 11 * Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk] 12 * 13 * with work by William Rucklidge (wjr@cs.cornell.edu) 14 * Geert Uytterhoeven 15 * Jes Sorensen (jds@kom.auc.dk) 16 * Martin Apel 17 * 18 * and on the original Atari console driver (atacon.c): 19 * 20 * Copyright (C) 1993 Bjoern Brauel 21 * Roman Hodek 22 * 23 * with work by Guenther Kelleter 24 * Martin Schaller 25 * Andreas Schwab 26 * 27 * Hardware cursor support added by Emmanuel Marty (core@ggi-project.org) 28 * Smart redraw scrolling, arbitrary font width support, 512char font support 29 * and software scrollback added by 30 * Jakub Jelinek (jj@ultra.linux.cz) 31 * 32 * Random hacking by Martin Mares <mj@ucw.cz> 33 * 34 * 2001 - Documented with DocBook 35 * - Brad Douglas <brad@neruo.com> 36 * 37 * The low level operations for the various display memory organizations are 38 * now in separate source files. 39 * 40 * Currently the following organizations are supported: 41 * 42 * o afb Amiga bitplanes 43 * o cfb{2,4,8,16,24,32} Packed pixels 44 * o ilbm Amiga interleaved bitplanes 45 * o iplan2p[248] Atari interleaved bitplanes 46 * o mfb Monochrome 47 * o vga VGA characters/attributes 48 * 49 * To do: 50 * 51 * - Implement 16 plane mode (iplan2p16) 52 * 53 * 54 * This file is subject to the terms and conditions of the GNU General Public 55 * License. See the file COPYING in the main directory of this archive for 56 * more details. 57 */ 58 59 #include <linux/module.h> 60 #include <linux/types.h> 61 #include <linux/fs.h> 62 #include <linux/kernel.h> 63 #include <linux/delay.h> /* MSch: for IRQ probe */ 64 #include <linux/console.h> 65 #include <linux/string.h> 66 #include <linux/kd.h> 67 #include <linux/slab.h> 68 #include <linux/fb.h> 69 #include <linux/fbcon.h> 70 #include <linux/vt_kern.h> 71 #include <linux/selection.h> 72 #include <linux/font.h> 73 #include <linux/smp.h> 74 #include <linux/init.h> 75 #include <linux/interrupt.h> 76 #include <linux/crc32.h> /* For counting font checksums */ 77 #include <linux/uaccess.h> 78 #include <asm/fb.h> 79 #include <asm/irq.h> 80 81 #include "fbcon.h" 82 83 /* 84 * FIXME: Locking 85 * 86 * - fbcon state itself is protected by the console_lock, and the code does a 87 * pretty good job at making sure that lock is held everywhere it's needed. 88 * 89 * - access to the registered_fb array is entirely unprotected. This should use 90 * proper object lifetime handling, i.e. get/put_fb_info. This also means 91 * switching from indices to proper pointers for fb_info everywhere. 92 * 93 * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it 94 * means concurrent access to the same fbdev from both fbcon and userspace 95 * will blow up. To fix this all fbcon calls from fbmem.c need to be moved out 96 * of fb_lock/unlock protected sections, since otherwise we'll recurse and 97 * deadlock eventually. Aside: Due to these deadlock issues the fbdev code in 98 * fbmem.c cannot use locking asserts, and there's lots of callers which get 99 * the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too. 100 */ 101 102 enum { 103 FBCON_LOGO_CANSHOW = -1, /* the logo can be shown */ 104 FBCON_LOGO_DRAW = -2, /* draw the logo to a console */ 105 FBCON_LOGO_DONTSHOW = -3 /* do not show the logo */ 106 }; 107 108 static struct fbcon_display fb_display[MAX_NR_CONSOLES]; 109 110 static signed char con2fb_map[MAX_NR_CONSOLES]; 111 static signed char con2fb_map_boot[MAX_NR_CONSOLES]; 112 113 static int logo_lines; 114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO 115 enums. */ 116 static int logo_shown = FBCON_LOGO_CANSHOW; 117 /* console mappings */ 118 static int first_fb_vc; 119 static int last_fb_vc = MAX_NR_CONSOLES - 1; 120 static int fbcon_is_default = 1; 121 static int primary_device = -1; 122 static int fbcon_has_console_bind; 123 124 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 125 static int map_override; 126 127 static inline void fbcon_map_override(void) 128 { 129 map_override = 1; 130 } 131 #else 132 static inline void fbcon_map_override(void) 133 { 134 } 135 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */ 136 137 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 138 static bool deferred_takeover = true; 139 #else 140 #define deferred_takeover false 141 #endif 142 143 /* font data */ 144 static char fontname[40]; 145 146 /* current fb_info */ 147 static int info_idx = -1; 148 149 /* console rotation */ 150 static int initial_rotation = -1; 151 static int fbcon_has_sysfs; 152 static int margin_color; 153 154 static const struct consw fb_con; 155 156 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row) 157 158 static int fbcon_cursor_noblink; 159 160 #define divides(a, b) ((!(a) || (b)%(a)) ? 0 : 1) 161 162 /* 163 * Interface used by the world 164 */ 165 166 static const char *fbcon_startup(void); 167 static void fbcon_init(struct vc_data *vc, int init); 168 static void fbcon_deinit(struct vc_data *vc); 169 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 170 int width); 171 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos); 172 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 173 int count, int ypos, int xpos); 174 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only); 175 static void fbcon_cursor(struct vc_data *vc, int mode); 176 static int fbcon_switch(struct vc_data *vc); 177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch); 178 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table); 179 180 /* 181 * Internal routines 182 */ 183 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 184 int unit); 185 static void fbcon_modechanged(struct fb_info *info); 186 static void fbcon_set_all_vcs(struct fb_info *info); 187 static void fbcon_start(void); 188 static void fbcon_exit(void); 189 static struct device *fbcon_device; 190 191 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION 192 static inline void fbcon_set_rotation(struct fb_info *info) 193 { 194 struct fbcon_ops *ops = info->fbcon_par; 195 196 if (!(info->flags & FBINFO_MISC_TILEBLITTING) && 197 ops->p->con_rotate < 4) 198 ops->rotate = ops->p->con_rotate; 199 else 200 ops->rotate = 0; 201 } 202 203 static void fbcon_rotate(struct fb_info *info, u32 rotate) 204 { 205 struct fbcon_ops *ops= info->fbcon_par; 206 struct fb_info *fb_info; 207 208 if (!ops || ops->currcon == -1) 209 return; 210 211 fb_info = registered_fb[con2fb_map[ops->currcon]]; 212 213 if (info == fb_info) { 214 struct fbcon_display *p = &fb_display[ops->currcon]; 215 216 if (rotate < 4) 217 p->con_rotate = rotate; 218 else 219 p->con_rotate = 0; 220 221 fbcon_modechanged(info); 222 } 223 } 224 225 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 226 { 227 struct fbcon_ops *ops = info->fbcon_par; 228 struct vc_data *vc; 229 struct fbcon_display *p; 230 int i; 231 232 if (!ops || ops->currcon < 0 || rotate > 3) 233 return; 234 235 for (i = first_fb_vc; i <= last_fb_vc; i++) { 236 vc = vc_cons[i].d; 237 if (!vc || vc->vc_mode != KD_TEXT || 238 registered_fb[con2fb_map[i]] != info) 239 continue; 240 241 p = &fb_display[vc->vc_num]; 242 p->con_rotate = rotate; 243 } 244 245 fbcon_set_all_vcs(info); 246 } 247 #else 248 static inline void fbcon_set_rotation(struct fb_info *info) 249 { 250 struct fbcon_ops *ops = info->fbcon_par; 251 252 ops->rotate = FB_ROTATE_UR; 253 } 254 255 static void fbcon_rotate(struct fb_info *info, u32 rotate) 256 { 257 return; 258 } 259 260 static void fbcon_rotate_all(struct fb_info *info, u32 rotate) 261 { 262 return; 263 } 264 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ 265 266 static int fbcon_get_rotate(struct fb_info *info) 267 { 268 struct fbcon_ops *ops = info->fbcon_par; 269 270 return (ops) ? ops->rotate : 0; 271 } 272 273 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info) 274 { 275 struct fbcon_ops *ops = info->fbcon_par; 276 277 return (info->state != FBINFO_STATE_RUNNING || 278 vc->vc_mode != KD_TEXT || ops->graphics); 279 } 280 281 static int get_color(struct vc_data *vc, struct fb_info *info, 282 u16 c, int is_fg) 283 { 284 int depth = fb_get_color_depth(&info->var, &info->fix); 285 int color = 0; 286 287 if (console_blanked) { 288 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff; 289 290 c = vc->vc_video_erase_char & charmask; 291 } 292 293 if (depth != 1) 294 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c) 295 : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c); 296 297 switch (depth) { 298 case 1: 299 { 300 int col = mono_col(info); 301 /* 0 or 1 */ 302 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0; 303 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col; 304 305 if (console_blanked) 306 fg = bg; 307 308 color = (is_fg) ? fg : bg; 309 break; 310 } 311 case 2: 312 /* 313 * Scale down 16-colors to 4 colors. Default 4-color palette 314 * is grayscale. However, simply dividing the values by 4 315 * will not work, as colors 1, 2 and 3 will be scaled-down 316 * to zero rendering them invisible. So empirically convert 317 * colors to a sane 4-level grayscale. 318 */ 319 switch (color) { 320 case 0: 321 color = 0; /* black */ 322 break; 323 case 1 ... 6: 324 color = 2; /* white */ 325 break; 326 case 7 ... 8: 327 color = 1; /* gray */ 328 break; 329 default: 330 color = 3; /* intense white */ 331 break; 332 } 333 break; 334 case 3: 335 /* 336 * Last 8 entries of default 16-color palette is a more intense 337 * version of the first 8 (i.e., same chrominance, different 338 * luminance). 339 */ 340 color &= 7; 341 break; 342 } 343 344 345 return color; 346 } 347 348 static void fb_flashcursor(struct work_struct *work) 349 { 350 struct fb_info *info = container_of(work, struct fb_info, queue); 351 struct fbcon_ops *ops = info->fbcon_par; 352 struct vc_data *vc = NULL; 353 int c; 354 int mode; 355 int ret; 356 357 /* FIXME: we should sort out the unbind locking instead */ 358 /* instead we just fail to flash the cursor if we can't get 359 * the lock instead of blocking fbcon deinit */ 360 ret = console_trylock(); 361 if (ret == 0) 362 return; 363 364 if (ops && ops->currcon != -1) 365 vc = vc_cons[ops->currcon].d; 366 367 if (!vc || !con_is_visible(vc) || 368 registered_fb[con2fb_map[vc->vc_num]] != info || 369 vc->vc_deccm != 1) { 370 console_unlock(); 371 return; 372 } 373 374 c = scr_readw((u16 *) vc->vc_pos); 375 mode = (!ops->cursor_flash || ops->cursor_state.enable) ? 376 CM_ERASE : CM_DRAW; 377 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 378 get_color(vc, info, c, 0)); 379 console_unlock(); 380 } 381 382 static void cursor_timer_handler(struct timer_list *t) 383 { 384 struct fbcon_ops *ops = from_timer(ops, t, cursor_timer); 385 struct fb_info *info = ops->info; 386 387 queue_work(system_power_efficient_wq, &info->queue); 388 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 389 } 390 391 static void fbcon_add_cursor_timer(struct fb_info *info) 392 { 393 struct fbcon_ops *ops = info->fbcon_par; 394 395 if ((!info->queue.func || info->queue.func == fb_flashcursor) && 396 !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) && 397 !fbcon_cursor_noblink) { 398 if (!info->queue.func) 399 INIT_WORK(&info->queue, fb_flashcursor); 400 401 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0); 402 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies); 403 ops->flags |= FBCON_FLAGS_CURSOR_TIMER; 404 } 405 } 406 407 static void fbcon_del_cursor_timer(struct fb_info *info) 408 { 409 struct fbcon_ops *ops = info->fbcon_par; 410 411 if (info->queue.func == fb_flashcursor && 412 ops->flags & FBCON_FLAGS_CURSOR_TIMER) { 413 del_timer_sync(&ops->cursor_timer); 414 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER; 415 } 416 } 417 418 #ifndef MODULE 419 static int __init fb_console_setup(char *this_opt) 420 { 421 char *options; 422 int i, j; 423 424 if (!this_opt || !*this_opt) 425 return 1; 426 427 while ((options = strsep(&this_opt, ",")) != NULL) { 428 if (!strncmp(options, "font:", 5)) { 429 strlcpy(fontname, options + 5, sizeof(fontname)); 430 continue; 431 } 432 433 if (!strncmp(options, "scrollback:", 11)) { 434 pr_warn("Ignoring scrollback size option\n"); 435 continue; 436 } 437 438 if (!strncmp(options, "map:", 4)) { 439 options += 4; 440 if (*options) { 441 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) { 442 if (!options[j]) 443 j = 0; 444 con2fb_map_boot[i] = 445 (options[j++]-'0') % FB_MAX; 446 } 447 448 fbcon_map_override(); 449 } 450 continue; 451 } 452 453 if (!strncmp(options, "vc:", 3)) { 454 options += 3; 455 if (*options) 456 first_fb_vc = simple_strtoul(options, &options, 10) - 1; 457 if (first_fb_vc < 0) 458 first_fb_vc = 0; 459 if (*options++ == '-') 460 last_fb_vc = simple_strtoul(options, &options, 10) - 1; 461 fbcon_is_default = 0; 462 continue; 463 } 464 465 if (!strncmp(options, "rotate:", 7)) { 466 options += 7; 467 if (*options) 468 initial_rotation = simple_strtoul(options, &options, 0); 469 if (initial_rotation > 3) 470 initial_rotation = 0; 471 continue; 472 } 473 474 if (!strncmp(options, "margin:", 7)) { 475 options += 7; 476 if (*options) 477 margin_color = simple_strtoul(options, &options, 0); 478 continue; 479 } 480 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 481 if (!strcmp(options, "nodefer")) { 482 deferred_takeover = false; 483 continue; 484 } 485 #endif 486 487 if (!strncmp(options, "logo-pos:", 9)) { 488 options += 9; 489 if (!strcmp(options, "center")) 490 fb_center_logo = true; 491 continue; 492 } 493 494 if (!strncmp(options, "logo-count:", 11)) { 495 options += 11; 496 if (*options) 497 fb_logo_count = simple_strtol(options, &options, 0); 498 continue; 499 } 500 } 501 return 1; 502 } 503 504 __setup("fbcon=", fb_console_setup); 505 #endif 506 507 static int search_fb_in_map(int idx) 508 { 509 int i, retval = 0; 510 511 for (i = first_fb_vc; i <= last_fb_vc; i++) { 512 if (con2fb_map[i] == idx) 513 retval = 1; 514 } 515 return retval; 516 } 517 518 static int search_for_mapped_con(void) 519 { 520 int i, retval = 0; 521 522 for (i = first_fb_vc; i <= last_fb_vc; i++) { 523 if (con2fb_map[i] != -1) 524 retval = 1; 525 } 526 return retval; 527 } 528 529 static int do_fbcon_takeover(int show_logo) 530 { 531 int err, i; 532 533 if (!num_registered_fb) 534 return -ENODEV; 535 536 if (!show_logo) 537 logo_shown = FBCON_LOGO_DONTSHOW; 538 539 for (i = first_fb_vc; i <= last_fb_vc; i++) 540 con2fb_map[i] = info_idx; 541 542 err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc, 543 fbcon_is_default); 544 545 if (err) { 546 for (i = first_fb_vc; i <= last_fb_vc; i++) 547 con2fb_map[i] = -1; 548 info_idx = -1; 549 } else { 550 fbcon_has_console_bind = 1; 551 } 552 553 return err; 554 } 555 556 #ifdef MODULE 557 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 558 int cols, int rows, int new_cols, int new_rows) 559 { 560 logo_shown = FBCON_LOGO_DONTSHOW; 561 } 562 #else 563 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info, 564 int cols, int rows, int new_cols, int new_rows) 565 { 566 /* Need to make room for the logo */ 567 struct fbcon_ops *ops = info->fbcon_par; 568 int cnt, erase = vc->vc_video_erase_char, step; 569 unsigned short *save = NULL, *r, *q; 570 int logo_height; 571 572 if (info->fbops->owner) { 573 logo_shown = FBCON_LOGO_DONTSHOW; 574 return; 575 } 576 577 /* 578 * remove underline attribute from erase character 579 * if black and white framebuffer. 580 */ 581 if (fb_get_color_depth(&info->var, &info->fix) == 1) 582 erase &= ~0x400; 583 logo_height = fb_prepare_logo(info, ops->rotate); 584 logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height); 585 q = (unsigned short *) (vc->vc_origin + 586 vc->vc_size_row * rows); 587 step = logo_lines * cols; 588 for (r = q - logo_lines * cols; r < q; r++) 589 if (scr_readw(r) != vc->vc_video_erase_char) 590 break; 591 if (r != q && new_rows >= rows + logo_lines) { 592 save = kmalloc(array3_size(logo_lines, new_cols, 2), 593 GFP_KERNEL); 594 if (save) { 595 int i = cols < new_cols ? cols : new_cols; 596 scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2)); 597 r = q - step; 598 for (cnt = 0; cnt < logo_lines; cnt++, r += i) 599 scr_memcpyw(save + cnt * new_cols, r, 2 * i); 600 r = q; 601 } 602 } 603 if (r == q) { 604 /* We can scroll screen down */ 605 r = q - step - cols; 606 for (cnt = rows - logo_lines; cnt > 0; cnt--) { 607 scr_memcpyw(r + step, r, vc->vc_size_row); 608 r -= cols; 609 } 610 if (!save) { 611 int lines; 612 if (vc->state.y + logo_lines >= rows) 613 lines = rows - vc->state.y - 1; 614 else 615 lines = logo_lines; 616 vc->state.y += lines; 617 vc->vc_pos += lines * vc->vc_size_row; 618 } 619 } 620 scr_memsetw((unsigned short *) vc->vc_origin, 621 erase, 622 vc->vc_size_row * logo_lines); 623 624 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 625 fbcon_clear_margins(vc, 0); 626 update_screen(vc); 627 } 628 629 if (save) { 630 q = (unsigned short *) (vc->vc_origin + 631 vc->vc_size_row * 632 rows); 633 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2)); 634 vc->state.y += logo_lines; 635 vc->vc_pos += logo_lines * vc->vc_size_row; 636 kfree(save); 637 } 638 639 if (logo_shown == FBCON_LOGO_DONTSHOW) 640 return; 641 642 if (logo_lines > vc->vc_bottom) { 643 logo_shown = FBCON_LOGO_CANSHOW; 644 printk(KERN_INFO 645 "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n"); 646 } else { 647 logo_shown = FBCON_LOGO_DRAW; 648 vc->vc_top = logo_lines; 649 } 650 } 651 #endif /* MODULE */ 652 653 #ifdef CONFIG_FB_TILEBLITTING 654 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 655 { 656 struct fbcon_ops *ops = info->fbcon_par; 657 658 ops->p = &fb_display[vc->vc_num]; 659 660 if ((info->flags & FBINFO_MISC_TILEBLITTING)) 661 fbcon_set_tileops(vc, info); 662 else { 663 fbcon_set_rotation(info); 664 fbcon_set_bitops(ops); 665 } 666 } 667 668 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 669 { 670 int err = 0; 671 672 if (info->flags & FBINFO_MISC_TILEBLITTING && 673 info->tileops->fb_get_tilemax(info) < charcount) 674 err = 1; 675 676 return err; 677 } 678 #else 679 static void set_blitting_type(struct vc_data *vc, struct fb_info *info) 680 { 681 struct fbcon_ops *ops = info->fbcon_par; 682 683 info->flags &= ~FBINFO_MISC_TILEBLITTING; 684 ops->p = &fb_display[vc->vc_num]; 685 fbcon_set_rotation(info); 686 fbcon_set_bitops(ops); 687 } 688 689 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount) 690 { 691 return 0; 692 } 693 694 #endif /* CONFIG_MISC_TILEBLITTING */ 695 696 697 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info, 698 int unit, int oldidx) 699 { 700 struct fbcon_ops *ops = NULL; 701 int err = 0; 702 703 if (!try_module_get(info->fbops->owner)) 704 err = -ENODEV; 705 706 if (!err && info->fbops->fb_open && 707 info->fbops->fb_open(info, 0)) 708 err = -ENODEV; 709 710 if (!err) { 711 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 712 if (!ops) 713 err = -ENOMEM; 714 } 715 716 if (!err) { 717 ops->cur_blink_jiffies = HZ / 5; 718 ops->info = info; 719 info->fbcon_par = ops; 720 721 if (vc) 722 set_blitting_type(vc, info); 723 } 724 725 if (err) { 726 con2fb_map[unit] = oldidx; 727 module_put(info->fbops->owner); 728 } 729 730 return err; 731 } 732 733 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo, 734 struct fb_info *newinfo, int unit, 735 int oldidx, int found) 736 { 737 struct fbcon_ops *ops = oldinfo->fbcon_par; 738 int err = 0, ret; 739 740 if (oldinfo->fbops->fb_release && 741 oldinfo->fbops->fb_release(oldinfo, 0)) { 742 con2fb_map[unit] = oldidx; 743 if (!found && newinfo->fbops->fb_release) 744 newinfo->fbops->fb_release(newinfo, 0); 745 if (!found) 746 module_put(newinfo->fbops->owner); 747 err = -ENODEV; 748 } 749 750 if (!err) { 751 fbcon_del_cursor_timer(oldinfo); 752 kfree(ops->cursor_state.mask); 753 kfree(ops->cursor_data); 754 kfree(ops->cursor_src); 755 kfree(ops->fontbuffer); 756 kfree(oldinfo->fbcon_par); 757 oldinfo->fbcon_par = NULL; 758 module_put(oldinfo->fbops->owner); 759 /* 760 If oldinfo and newinfo are driving the same hardware, 761 the fb_release() method of oldinfo may attempt to 762 restore the hardware state. This will leave the 763 newinfo in an undefined state. Thus, a call to 764 fb_set_par() may be needed for the newinfo. 765 */ 766 if (newinfo && newinfo->fbops->fb_set_par) { 767 ret = newinfo->fbops->fb_set_par(newinfo); 768 769 if (ret) 770 printk(KERN_ERR "con2fb_release_oldinfo: " 771 "detected unhandled fb_set_par error, " 772 "error code %d\n", ret); 773 } 774 } 775 776 return err; 777 } 778 779 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info, 780 int unit, int show_logo) 781 { 782 struct fbcon_ops *ops = info->fbcon_par; 783 int ret; 784 785 ops->currcon = fg_console; 786 787 if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) { 788 ret = info->fbops->fb_set_par(info); 789 790 if (ret) 791 printk(KERN_ERR "con2fb_init_display: detected " 792 "unhandled fb_set_par error, " 793 "error code %d\n", ret); 794 } 795 796 ops->flags |= FBCON_FLAGS_INIT; 797 ops->graphics = 0; 798 fbcon_set_disp(info, &info->var, unit); 799 800 if (show_logo) { 801 struct vc_data *fg_vc = vc_cons[fg_console].d; 802 struct fb_info *fg_info = 803 registered_fb[con2fb_map[fg_console]]; 804 805 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols, 806 fg_vc->vc_rows, fg_vc->vc_cols, 807 fg_vc->vc_rows); 808 } 809 810 update_screen(vc_cons[fg_console].d); 811 } 812 813 /** 814 * set_con2fb_map - map console to frame buffer device 815 * @unit: virtual console number to map 816 * @newidx: frame buffer index to map virtual console to 817 * @user: user request 818 * 819 * Maps a virtual console @unit to a frame buffer device 820 * @newidx. 821 * 822 * This should be called with the console lock held. 823 */ 824 static int set_con2fb_map(int unit, int newidx, int user) 825 { 826 struct vc_data *vc = vc_cons[unit].d; 827 int oldidx = con2fb_map[unit]; 828 struct fb_info *info = registered_fb[newidx]; 829 struct fb_info *oldinfo = NULL; 830 int found, err = 0; 831 832 WARN_CONSOLE_UNLOCKED(); 833 834 if (oldidx == newidx) 835 return 0; 836 837 if (!info) 838 return -EINVAL; 839 840 if (!search_for_mapped_con() || !con_is_bound(&fb_con)) { 841 info_idx = newidx; 842 return do_fbcon_takeover(0); 843 } 844 845 if (oldidx != -1) 846 oldinfo = registered_fb[oldidx]; 847 848 found = search_fb_in_map(newidx); 849 850 con2fb_map[unit] = newidx; 851 if (!err && !found) 852 err = con2fb_acquire_newinfo(vc, info, unit, oldidx); 853 854 /* 855 * If old fb is not mapped to any of the consoles, 856 * fbcon should release it. 857 */ 858 if (!err && oldinfo && !search_fb_in_map(oldidx)) 859 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx, 860 found); 861 862 if (!err) { 863 int show_logo = (fg_console == 0 && !user && 864 logo_shown != FBCON_LOGO_DONTSHOW); 865 866 if (!found) 867 fbcon_add_cursor_timer(info); 868 con2fb_map_boot[unit] = newidx; 869 con2fb_init_display(vc, info, unit, show_logo); 870 } 871 872 if (!search_fb_in_map(info_idx)) 873 info_idx = newidx; 874 875 return err; 876 } 877 878 /* 879 * Low Level Operations 880 */ 881 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */ 882 static int var_to_display(struct fbcon_display *disp, 883 struct fb_var_screeninfo *var, 884 struct fb_info *info) 885 { 886 disp->xres_virtual = var->xres_virtual; 887 disp->yres_virtual = var->yres_virtual; 888 disp->bits_per_pixel = var->bits_per_pixel; 889 disp->grayscale = var->grayscale; 890 disp->nonstd = var->nonstd; 891 disp->accel_flags = var->accel_flags; 892 disp->height = var->height; 893 disp->width = var->width; 894 disp->red = var->red; 895 disp->green = var->green; 896 disp->blue = var->blue; 897 disp->transp = var->transp; 898 disp->rotate = var->rotate; 899 disp->mode = fb_match_mode(var, &info->modelist); 900 if (disp->mode == NULL) 901 /* This should not happen */ 902 return -EINVAL; 903 return 0; 904 } 905 906 static void display_to_var(struct fb_var_screeninfo *var, 907 struct fbcon_display *disp) 908 { 909 fb_videomode_to_var(var, disp->mode); 910 var->xres_virtual = disp->xres_virtual; 911 var->yres_virtual = disp->yres_virtual; 912 var->bits_per_pixel = disp->bits_per_pixel; 913 var->grayscale = disp->grayscale; 914 var->nonstd = disp->nonstd; 915 var->accel_flags = disp->accel_flags; 916 var->height = disp->height; 917 var->width = disp->width; 918 var->red = disp->red; 919 var->green = disp->green; 920 var->blue = disp->blue; 921 var->transp = disp->transp; 922 var->rotate = disp->rotate; 923 } 924 925 static const char *fbcon_startup(void) 926 { 927 const char *display_desc = "frame buffer device"; 928 struct fbcon_display *p = &fb_display[fg_console]; 929 struct vc_data *vc = vc_cons[fg_console].d; 930 const struct font_desc *font = NULL; 931 struct module *owner; 932 struct fb_info *info = NULL; 933 struct fbcon_ops *ops; 934 int rows, cols; 935 936 /* 937 * If num_registered_fb is zero, this is a call for the dummy part. 938 * The frame buffer devices weren't initialized yet. 939 */ 940 if (!num_registered_fb || info_idx == -1) 941 return display_desc; 942 /* 943 * Instead of blindly using registered_fb[0], we use info_idx, set by 944 * fb_console_init(); 945 */ 946 info = registered_fb[info_idx]; 947 if (!info) 948 return NULL; 949 950 owner = info->fbops->owner; 951 if (!try_module_get(owner)) 952 return NULL; 953 if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) { 954 module_put(owner); 955 return NULL; 956 } 957 958 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL); 959 if (!ops) { 960 module_put(owner); 961 return NULL; 962 } 963 964 ops->currcon = -1; 965 ops->graphics = 1; 966 ops->cur_rotate = -1; 967 ops->cur_blink_jiffies = HZ / 5; 968 ops->info = info; 969 info->fbcon_par = ops; 970 971 p->con_rotate = initial_rotation; 972 if (p->con_rotate == -1) 973 p->con_rotate = info->fbcon_rotate_hint; 974 if (p->con_rotate == -1) 975 p->con_rotate = FB_ROTATE_UR; 976 977 set_blitting_type(vc, info); 978 979 /* Setup default font */ 980 if (!p->fontdata && !vc->vc_font.data) { 981 if (!fontname[0] || !(font = find_font(fontname))) 982 font = get_default_font(info->var.xres, 983 info->var.yres, 984 info->pixmap.blit_x, 985 info->pixmap.blit_y); 986 vc->vc_font.width = font->width; 987 vc->vc_font.height = font->height; 988 vc->vc_font.data = (void *)(p->fontdata = font->data); 989 vc->vc_font.charcount = font->charcount; 990 } else { 991 p->fontdata = vc->vc_font.data; 992 } 993 994 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 995 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 996 cols /= vc->vc_font.width; 997 rows /= vc->vc_font.height; 998 vc_resize(vc, cols, rows); 999 1000 pr_debug("mode: %s\n", info->fix.id); 1001 pr_debug("visual: %d\n", info->fix.visual); 1002 pr_debug("res: %dx%d-%d\n", info->var.xres, 1003 info->var.yres, 1004 info->var.bits_per_pixel); 1005 1006 fbcon_add_cursor_timer(info); 1007 return display_desc; 1008 } 1009 1010 static void fbcon_init(struct vc_data *vc, int init) 1011 { 1012 struct fb_info *info; 1013 struct fbcon_ops *ops; 1014 struct vc_data **default_mode = vc->vc_display_fg; 1015 struct vc_data *svc = *default_mode; 1016 struct fbcon_display *t, *p = &fb_display[vc->vc_num]; 1017 int logo = 1, new_rows, new_cols, rows, cols; 1018 int ret; 1019 1020 if (WARN_ON(info_idx == -1)) 1021 return; 1022 1023 if (con2fb_map[vc->vc_num] == -1) 1024 con2fb_map[vc->vc_num] = info_idx; 1025 1026 info = registered_fb[con2fb_map[vc->vc_num]]; 1027 1028 if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET) 1029 logo_shown = FBCON_LOGO_DONTSHOW; 1030 1031 if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW || 1032 (info->fix.type == FB_TYPE_TEXT)) 1033 logo = 0; 1034 1035 if (var_to_display(p, &info->var, info)) 1036 return; 1037 1038 if (!info->fbcon_par) 1039 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); 1040 1041 /* If we are not the first console on this 1042 fb, copy the font from that console */ 1043 t = &fb_display[fg_console]; 1044 if (!p->fontdata) { 1045 if (t->fontdata) { 1046 struct vc_data *fvc = vc_cons[fg_console].d; 1047 1048 vc->vc_font.data = (void *)(p->fontdata = 1049 fvc->vc_font.data); 1050 vc->vc_font.width = fvc->vc_font.width; 1051 vc->vc_font.height = fvc->vc_font.height; 1052 vc->vc_font.charcount = fvc->vc_font.charcount; 1053 p->userfont = t->userfont; 1054 1055 if (p->userfont) 1056 REFCOUNT(p->fontdata)++; 1057 } else { 1058 const struct font_desc *font = NULL; 1059 1060 if (!fontname[0] || !(font = find_font(fontname))) 1061 font = get_default_font(info->var.xres, 1062 info->var.yres, 1063 info->pixmap.blit_x, 1064 info->pixmap.blit_y); 1065 vc->vc_font.width = font->width; 1066 vc->vc_font.height = font->height; 1067 vc->vc_font.data = (void *)(p->fontdata = font->data); 1068 vc->vc_font.charcount = font->charcount; 1069 } 1070 } 1071 1072 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1073 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1074 if (vc->vc_font.charcount == 256) { 1075 vc->vc_hi_font_mask = 0; 1076 } else { 1077 vc->vc_hi_font_mask = 0x100; 1078 if (vc->vc_can_do_color) 1079 vc->vc_complement_mask <<= 1; 1080 } 1081 1082 if (!*svc->vc_uni_pagedir_loc) 1083 con_set_default_unimap(svc); 1084 if (!*vc->vc_uni_pagedir_loc) 1085 con_copy_unimap(vc, svc); 1086 1087 ops = info->fbcon_par; 1088 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1089 1090 p->con_rotate = initial_rotation; 1091 if (p->con_rotate == -1) 1092 p->con_rotate = info->fbcon_rotate_hint; 1093 if (p->con_rotate == -1) 1094 p->con_rotate = FB_ROTATE_UR; 1095 1096 set_blitting_type(vc, info); 1097 1098 cols = vc->vc_cols; 1099 rows = vc->vc_rows; 1100 new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1101 new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1102 new_cols /= vc->vc_font.width; 1103 new_rows /= vc->vc_font.height; 1104 1105 /* 1106 * We must always set the mode. The mode of the previous console 1107 * driver could be in the same resolution but we are using different 1108 * hardware so we have to initialize the hardware. 1109 * 1110 * We need to do it in fbcon_init() to prevent screen corruption. 1111 */ 1112 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1113 if (info->fbops->fb_set_par && 1114 !(ops->flags & FBCON_FLAGS_INIT)) { 1115 ret = info->fbops->fb_set_par(info); 1116 1117 if (ret) 1118 printk(KERN_ERR "fbcon_init: detected " 1119 "unhandled fb_set_par error, " 1120 "error code %d\n", ret); 1121 } 1122 1123 ops->flags |= FBCON_FLAGS_INIT; 1124 } 1125 1126 ops->graphics = 0; 1127 1128 /* 1129 * ++guenther: console.c:vc_allocate() relies on initializing 1130 * vc_{cols,rows}, but we must not set those if we are only 1131 * resizing the console. 1132 */ 1133 if (init) { 1134 vc->vc_cols = new_cols; 1135 vc->vc_rows = new_rows; 1136 } else 1137 vc_resize(vc, new_cols, new_rows); 1138 1139 if (logo) 1140 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows); 1141 1142 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1143 ops->rotate = FB_ROTATE_UR; 1144 set_blitting_type(vc, info); 1145 } 1146 1147 ops->p = &fb_display[fg_console]; 1148 } 1149 1150 static void fbcon_free_font(struct fbcon_display *p, bool freefont) 1151 { 1152 if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0)) 1153 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int)); 1154 p->fontdata = NULL; 1155 p->userfont = 0; 1156 } 1157 1158 static void set_vc_hi_font(struct vc_data *vc, bool set); 1159 1160 static void fbcon_deinit(struct vc_data *vc) 1161 { 1162 struct fbcon_display *p = &fb_display[vc->vc_num]; 1163 struct fb_info *info; 1164 struct fbcon_ops *ops; 1165 int idx; 1166 bool free_font = true; 1167 1168 idx = con2fb_map[vc->vc_num]; 1169 1170 if (idx == -1) 1171 goto finished; 1172 1173 info = registered_fb[idx]; 1174 1175 if (!info) 1176 goto finished; 1177 1178 if (info->flags & FBINFO_MISC_FIRMWARE) 1179 free_font = false; 1180 ops = info->fbcon_par; 1181 1182 if (!ops) 1183 goto finished; 1184 1185 if (con_is_visible(vc)) 1186 fbcon_del_cursor_timer(info); 1187 1188 ops->flags &= ~FBCON_FLAGS_INIT; 1189 finished: 1190 1191 fbcon_free_font(p, free_font); 1192 if (free_font) 1193 vc->vc_font.data = NULL; 1194 1195 if (vc->vc_hi_font_mask && vc->vc_screenbuf) 1196 set_vc_hi_font(vc, false); 1197 1198 if (!con_is_bound(&fb_con)) 1199 fbcon_exit(); 1200 1201 if (vc->vc_num == logo_shown) 1202 logo_shown = FBCON_LOGO_CANSHOW; 1203 1204 return; 1205 } 1206 1207 /* ====================================================================== */ 1208 1209 /* fbcon_XXX routines - interface used by the world 1210 * 1211 * This system is now divided into two levels because of complications 1212 * caused by hardware scrolling. Top level functions: 1213 * 1214 * fbcon_clear(), fbcon_putc(), fbcon_clear_margins() 1215 * 1216 * handles y values in range [0, scr_height-1] that correspond to real 1217 * screen positions. y_wrap shift means that first line of bitmap may be 1218 * anywhere on this display. These functions convert lineoffsets to 1219 * bitmap offsets and deal with the wrap-around case by splitting blits. 1220 * 1221 * fbcon_clear_physical_8() -- of original fbcon_XXX fns. 1222 * fbcon_putc_physical_8() -- (font width != 8) may be added later 1223 * 1224 * WARNING: 1225 * 1226 * At the moment fbcon_putc() cannot blit across vertical wrap boundary 1227 * Implies should only really hardware scroll in rows. Only reason for 1228 * restriction is simplicity & efficiency at the moment. 1229 */ 1230 1231 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height, 1232 int width) 1233 { 1234 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1235 struct fbcon_ops *ops = info->fbcon_par; 1236 1237 struct fbcon_display *p = &fb_display[vc->vc_num]; 1238 u_int y_break; 1239 1240 if (fbcon_is_inactive(vc, info)) 1241 return; 1242 1243 if (!height || !width) 1244 return; 1245 1246 if (sy < vc->vc_top && vc->vc_top == logo_lines) { 1247 vc->vc_top = 0; 1248 /* 1249 * If the font dimensions are not an integral of the display 1250 * dimensions then the ops->clear below won't end up clearing 1251 * the margins. Call clear_margins here in case the logo 1252 * bitmap stretched into the margin area. 1253 */ 1254 fbcon_clear_margins(vc, 0); 1255 } 1256 1257 /* Split blits that cross physical y_wrap boundary */ 1258 1259 y_break = p->vrows - p->yscroll; 1260 if (sy < y_break && sy + height - 1 >= y_break) { 1261 u_int b = y_break - sy; 1262 ops->clear(vc, info, real_y(p, sy), sx, b, width); 1263 ops->clear(vc, info, real_y(p, sy + b), sx, height - b, 1264 width); 1265 } else 1266 ops->clear(vc, info, real_y(p, sy), sx, height, width); 1267 } 1268 1269 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s, 1270 int count, int ypos, int xpos) 1271 { 1272 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1273 struct fbcon_display *p = &fb_display[vc->vc_num]; 1274 struct fbcon_ops *ops = info->fbcon_par; 1275 1276 if (!fbcon_is_inactive(vc, info)) 1277 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos, 1278 get_color(vc, info, scr_readw(s), 1), 1279 get_color(vc, info, scr_readw(s), 0)); 1280 } 1281 1282 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos) 1283 { 1284 unsigned short chr; 1285 1286 scr_writew(c, &chr); 1287 fbcon_putcs(vc, &chr, 1, ypos, xpos); 1288 } 1289 1290 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only) 1291 { 1292 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1293 struct fbcon_ops *ops = info->fbcon_par; 1294 1295 if (!fbcon_is_inactive(vc, info)) 1296 ops->clear_margins(vc, info, margin_color, bottom_only); 1297 } 1298 1299 static void fbcon_cursor(struct vc_data *vc, int mode) 1300 { 1301 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1302 struct fbcon_ops *ops = info->fbcon_par; 1303 int c = scr_readw((u16 *) vc->vc_pos); 1304 1305 ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); 1306 1307 if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1) 1308 return; 1309 1310 if (vc->vc_cursor_type & CUR_SW) 1311 fbcon_del_cursor_timer(info); 1312 else 1313 fbcon_add_cursor_timer(info); 1314 1315 ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1; 1316 1317 if (!ops->cursor) 1318 return; 1319 1320 ops->cursor(vc, info, mode, get_color(vc, info, c, 1), 1321 get_color(vc, info, c, 0)); 1322 } 1323 1324 static int scrollback_phys_max = 0; 1325 static int scrollback_max = 0; 1326 static int scrollback_current = 0; 1327 1328 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var, 1329 int unit) 1330 { 1331 struct fbcon_display *p, *t; 1332 struct vc_data **default_mode, *vc; 1333 struct vc_data *svc; 1334 struct fbcon_ops *ops = info->fbcon_par; 1335 int rows, cols; 1336 1337 p = &fb_display[unit]; 1338 1339 if (var_to_display(p, var, info)) 1340 return; 1341 1342 vc = vc_cons[unit].d; 1343 1344 if (!vc) 1345 return; 1346 1347 default_mode = vc->vc_display_fg; 1348 svc = *default_mode; 1349 t = &fb_display[svc->vc_num]; 1350 1351 if (!vc->vc_font.data) { 1352 vc->vc_font.data = (void *)(p->fontdata = t->fontdata); 1353 vc->vc_font.width = (*default_mode)->vc_font.width; 1354 vc->vc_font.height = (*default_mode)->vc_font.height; 1355 vc->vc_font.charcount = (*default_mode)->vc_font.charcount; 1356 p->userfont = t->userfont; 1357 if (p->userfont) 1358 REFCOUNT(p->fontdata)++; 1359 } 1360 1361 var->activate = FB_ACTIVATE_NOW; 1362 info->var.activate = var->activate; 1363 var->yoffset = info->var.yoffset; 1364 var->xoffset = info->var.xoffset; 1365 fb_set_var(info, var); 1366 ops->var = info->var; 1367 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1368 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1369 if (vc->vc_font.charcount == 256) { 1370 vc->vc_hi_font_mask = 0; 1371 } else { 1372 vc->vc_hi_font_mask = 0x100; 1373 if (vc->vc_can_do_color) 1374 vc->vc_complement_mask <<= 1; 1375 } 1376 1377 if (!*svc->vc_uni_pagedir_loc) 1378 con_set_default_unimap(svc); 1379 if (!*vc->vc_uni_pagedir_loc) 1380 con_copy_unimap(vc, svc); 1381 1382 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1383 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1384 cols /= vc->vc_font.width; 1385 rows /= vc->vc_font.height; 1386 vc_resize(vc, cols, rows); 1387 1388 if (con_is_visible(vc)) { 1389 update_screen(vc); 1390 } 1391 } 1392 1393 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p, 1394 int line, int count, int offset) 1395 { 1396 unsigned short *d = (unsigned short *) 1397 (vc->vc_origin + vc->vc_size_row * line); 1398 unsigned short *s = d + offset; 1399 1400 while (count--) { 1401 unsigned short *start = s; 1402 unsigned short *le = advance_row(s, 1); 1403 unsigned short c; 1404 int x = 0; 1405 unsigned short attr = 1; 1406 1407 do { 1408 c = scr_readw(s); 1409 if (attr != (c & 0xff00)) { 1410 attr = c & 0xff00; 1411 if (s > start) { 1412 fbcon_putcs(vc, start, s - start, 1413 line, x); 1414 x += s - start; 1415 start = s; 1416 } 1417 } 1418 if (c == scr_readw(d)) { 1419 if (s > start) { 1420 fbcon_putcs(vc, start, s - start, 1421 line, x); 1422 x += s - start + 1; 1423 start = s + 1; 1424 } else { 1425 x++; 1426 start++; 1427 } 1428 } 1429 scr_writew(c, d); 1430 console_conditional_schedule(); 1431 s++; 1432 d++; 1433 } while (s < le); 1434 if (s > start) 1435 fbcon_putcs(vc, start, s - start, line, x); 1436 console_conditional_schedule(); 1437 if (offset > 0) 1438 line++; 1439 else { 1440 line--; 1441 /* NOTE: We subtract two lines from these pointers */ 1442 s -= vc->vc_size_row; 1443 d -= vc->vc_size_row; 1444 } 1445 } 1446 } 1447 1448 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b, 1449 enum con_scroll dir, unsigned int count) 1450 { 1451 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1452 struct fbcon_display *p = &fb_display[vc->vc_num]; 1453 1454 if (fbcon_is_inactive(vc, info)) 1455 return true; 1456 1457 fbcon_cursor(vc, CM_ERASE); 1458 1459 /* 1460 * ++Geert: Only use ywrap/ypan if the console is in text mode 1461 * ++Andrew: Only use ypan on hardware text mode when scrolling the 1462 * whole screen (prevents flicker). 1463 */ 1464 1465 switch (dir) { 1466 case SM_UP: 1467 if (count > vc->vc_rows) /* Maximum realistic size */ 1468 count = vc->vc_rows; 1469 fbcon_redraw(vc, p, t, b - t - count, 1470 count * vc->vc_cols); 1471 fbcon_clear(vc, b - count, 0, count, vc->vc_cols); 1472 scr_memsetw((unsigned short *) (vc->vc_origin + 1473 vc->vc_size_row * 1474 (b - count)), 1475 vc->vc_video_erase_char, 1476 vc->vc_size_row * count); 1477 return true; 1478 1479 case SM_DOWN: 1480 if (count > vc->vc_rows) /* Maximum realistic size */ 1481 count = vc->vc_rows; 1482 fbcon_redraw(vc, p, b - 1, b - t - count, 1483 -count * vc->vc_cols); 1484 fbcon_clear(vc, t, 0, count, vc->vc_cols); 1485 scr_memsetw((unsigned short *) (vc->vc_origin + 1486 vc->vc_size_row * 1487 t), 1488 vc->vc_video_erase_char, 1489 vc->vc_size_row * count); 1490 return true; 1491 } 1492 return false; 1493 } 1494 1495 static void updatescrollmode(struct fbcon_display *p, 1496 struct fb_info *info, 1497 struct vc_data *vc) 1498 { 1499 struct fbcon_ops *ops = info->fbcon_par; 1500 int fh = vc->vc_font.height; 1501 int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1502 int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual, 1503 info->var.xres_virtual); 1504 1505 p->vrows = vyres/fh; 1506 if (yres > (fh * (vc->vc_rows + 1))) 1507 p->vrows -= (yres - (fh * vc->vc_rows)) / fh; 1508 if ((yres % fh) && (vyres % fh < yres % fh)) 1509 p->vrows--; 1510 } 1511 1512 #define PITCH(w) (((w) + 7) >> 3) 1513 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */ 1514 1515 static int fbcon_resize(struct vc_data *vc, unsigned int width, 1516 unsigned int height, unsigned int user) 1517 { 1518 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1519 struct fbcon_ops *ops = info->fbcon_par; 1520 struct fbcon_display *p = &fb_display[vc->vc_num]; 1521 struct fb_var_screeninfo var = info->var; 1522 int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh; 1523 1524 if (p->userfont && FNTSIZE(vc->vc_font.data)) { 1525 int size; 1526 int pitch = PITCH(vc->vc_font.width); 1527 1528 /* 1529 * If user font, ensure that a possible change to user font 1530 * height or width will not allow a font data out-of-bounds access. 1531 * NOTE: must use original charcount in calculation as font 1532 * charcount can change and cannot be used to determine the 1533 * font data allocated size. 1534 */ 1535 if (pitch <= 0) 1536 return -EINVAL; 1537 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount); 1538 if (size > FNTSIZE(vc->vc_font.data)) 1539 return -EINVAL; 1540 } 1541 1542 virt_w = FBCON_SWAP(ops->rotate, width, height); 1543 virt_h = FBCON_SWAP(ops->rotate, height, width); 1544 virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width, 1545 vc->vc_font.height); 1546 virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height, 1547 vc->vc_font.width); 1548 var.xres = virt_w * virt_fw; 1549 var.yres = virt_h * virt_fh; 1550 x_diff = info->var.xres - var.xres; 1551 y_diff = info->var.yres - var.yres; 1552 if (x_diff < 0 || x_diff > virt_fw || 1553 y_diff < 0 || y_diff > virt_fh) { 1554 const struct fb_videomode *mode; 1555 1556 pr_debug("attempting resize %ix%i\n", var.xres, var.yres); 1557 mode = fb_find_best_mode(&var, &info->modelist); 1558 if (mode == NULL) 1559 return -EINVAL; 1560 display_to_var(&var, p); 1561 fb_videomode_to_var(&var, mode); 1562 1563 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh) 1564 return -EINVAL; 1565 1566 pr_debug("resize now %ix%i\n", var.xres, var.yres); 1567 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) { 1568 var.activate = FB_ACTIVATE_NOW | 1569 FB_ACTIVATE_FORCE; 1570 fb_set_var(info, &var); 1571 } 1572 var_to_display(p, &info->var, info); 1573 ops->var = info->var; 1574 } 1575 updatescrollmode(p, info, vc); 1576 return 0; 1577 } 1578 1579 static int fbcon_switch(struct vc_data *vc) 1580 { 1581 struct fb_info *info, *old_info = NULL; 1582 struct fbcon_ops *ops; 1583 struct fbcon_display *p = &fb_display[vc->vc_num]; 1584 struct fb_var_screeninfo var; 1585 int i, ret, prev_console; 1586 1587 info = registered_fb[con2fb_map[vc->vc_num]]; 1588 ops = info->fbcon_par; 1589 1590 if (logo_shown >= 0) { 1591 struct vc_data *conp2 = vc_cons[logo_shown].d; 1592 1593 if (conp2->vc_top == logo_lines 1594 && conp2->vc_bottom == conp2->vc_rows) 1595 conp2->vc_top = 0; 1596 logo_shown = FBCON_LOGO_CANSHOW; 1597 } 1598 1599 prev_console = ops->currcon; 1600 if (prev_console != -1) 1601 old_info = registered_fb[con2fb_map[prev_console]]; 1602 /* 1603 * FIXME: If we have multiple fbdev's loaded, we need to 1604 * update all info->currcon. Perhaps, we can place this 1605 * in a centralized structure, but this might break some 1606 * drivers. 1607 * 1608 * info->currcon = vc->vc_num; 1609 */ 1610 for_each_registered_fb(i) { 1611 if (registered_fb[i]->fbcon_par) { 1612 struct fbcon_ops *o = registered_fb[i]->fbcon_par; 1613 1614 o->currcon = vc->vc_num; 1615 } 1616 } 1617 memset(&var, 0, sizeof(struct fb_var_screeninfo)); 1618 display_to_var(&var, p); 1619 var.activate = FB_ACTIVATE_NOW; 1620 1621 /* 1622 * make sure we don't unnecessarily trip the memcmp() 1623 * in fb_set_var() 1624 */ 1625 info->var.activate = var.activate; 1626 var.vmode |= info->var.vmode & ~FB_VMODE_MASK; 1627 fb_set_var(info, &var); 1628 ops->var = info->var; 1629 1630 if (old_info != NULL && (old_info != info || 1631 info->flags & FBINFO_MISC_ALWAYS_SETPAR)) { 1632 if (info->fbops->fb_set_par) { 1633 ret = info->fbops->fb_set_par(info); 1634 1635 if (ret) 1636 printk(KERN_ERR "fbcon_switch: detected " 1637 "unhandled fb_set_par error, " 1638 "error code %d\n", ret); 1639 } 1640 1641 if (old_info != info) 1642 fbcon_del_cursor_timer(old_info); 1643 } 1644 1645 if (fbcon_is_inactive(vc, info) || 1646 ops->blank_state != FB_BLANK_UNBLANK) 1647 fbcon_del_cursor_timer(info); 1648 else 1649 fbcon_add_cursor_timer(info); 1650 1651 set_blitting_type(vc, info); 1652 ops->cursor_reset = 1; 1653 1654 if (ops->rotate_font && ops->rotate_font(info, vc)) { 1655 ops->rotate = FB_ROTATE_UR; 1656 set_blitting_type(vc, info); 1657 } 1658 1659 vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1); 1660 vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800; 1661 1662 if (vc->vc_font.charcount > 256) 1663 vc->vc_complement_mask <<= 1; 1664 1665 updatescrollmode(p, info, vc); 1666 1667 scrollback_phys_max = 0; 1668 scrollback_max = 0; 1669 scrollback_current = 0; 1670 1671 if (!fbcon_is_inactive(vc, info)) { 1672 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 1673 ops->update_start(info); 1674 } 1675 1676 fbcon_set_palette(vc, color_table); 1677 fbcon_clear_margins(vc, 0); 1678 1679 if (logo_shown == FBCON_LOGO_DRAW) { 1680 1681 logo_shown = fg_console; 1682 /* This is protected above by initmem_freed */ 1683 fb_show_logo(info, ops->rotate); 1684 update_region(vc, 1685 vc->vc_origin + vc->vc_size_row * vc->vc_top, 1686 vc->vc_size_row * (vc->vc_bottom - 1687 vc->vc_top) / 2); 1688 return 0; 1689 } 1690 return 1; 1691 } 1692 1693 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info, 1694 int blank) 1695 { 1696 if (blank) { 1697 unsigned short charmask = vc->vc_hi_font_mask ? 1698 0x1ff : 0xff; 1699 unsigned short oldc; 1700 1701 oldc = vc->vc_video_erase_char; 1702 vc->vc_video_erase_char &= charmask; 1703 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols); 1704 vc->vc_video_erase_char = oldc; 1705 } 1706 } 1707 1708 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch) 1709 { 1710 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1711 struct fbcon_ops *ops = info->fbcon_par; 1712 1713 if (mode_switch) { 1714 struct fb_var_screeninfo var = info->var; 1715 1716 ops->graphics = 1; 1717 1718 if (!blank) { 1719 var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE | 1720 FB_ACTIVATE_KD_TEXT; 1721 fb_set_var(info, &var); 1722 ops->graphics = 0; 1723 ops->var = info->var; 1724 } 1725 } 1726 1727 if (!fbcon_is_inactive(vc, info)) { 1728 if (ops->blank_state != blank) { 1729 ops->blank_state = blank; 1730 fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW); 1731 ops->cursor_flash = (!blank); 1732 1733 if (fb_blank(info, blank)) 1734 fbcon_generic_blank(vc, info, blank); 1735 } 1736 1737 if (!blank) 1738 update_screen(vc); 1739 } 1740 1741 if (mode_switch || fbcon_is_inactive(vc, info) || 1742 ops->blank_state != FB_BLANK_UNBLANK) 1743 fbcon_del_cursor_timer(info); 1744 else 1745 fbcon_add_cursor_timer(info); 1746 1747 return 0; 1748 } 1749 1750 static int fbcon_debug_enter(struct vc_data *vc) 1751 { 1752 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1753 struct fbcon_ops *ops = info->fbcon_par; 1754 1755 ops->save_graphics = ops->graphics; 1756 ops->graphics = 0; 1757 if (info->fbops->fb_debug_enter) 1758 info->fbops->fb_debug_enter(info); 1759 fbcon_set_palette(vc, color_table); 1760 return 0; 1761 } 1762 1763 static int fbcon_debug_leave(struct vc_data *vc) 1764 { 1765 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1766 struct fbcon_ops *ops = info->fbcon_par; 1767 1768 ops->graphics = ops->save_graphics; 1769 if (info->fbops->fb_debug_leave) 1770 info->fbops->fb_debug_leave(info); 1771 return 0; 1772 } 1773 1774 static int fbcon_get_font(struct vc_data *vc, struct console_font *font) 1775 { 1776 u8 *fontdata = vc->vc_font.data; 1777 u8 *data = font->data; 1778 int i, j; 1779 1780 font->width = vc->vc_font.width; 1781 font->height = vc->vc_font.height; 1782 font->charcount = vc->vc_hi_font_mask ? 512 : 256; 1783 if (!font->data) 1784 return 0; 1785 1786 if (font->width <= 8) { 1787 j = vc->vc_font.height; 1788 if (font->charcount * j > FNTSIZE(fontdata)) 1789 return -EINVAL; 1790 1791 for (i = 0; i < font->charcount; i++) { 1792 memcpy(data, fontdata, j); 1793 memset(data + j, 0, 32 - j); 1794 data += 32; 1795 fontdata += j; 1796 } 1797 } else if (font->width <= 16) { 1798 j = vc->vc_font.height * 2; 1799 if (font->charcount * j > FNTSIZE(fontdata)) 1800 return -EINVAL; 1801 1802 for (i = 0; i < font->charcount; i++) { 1803 memcpy(data, fontdata, j); 1804 memset(data + j, 0, 64 - j); 1805 data += 64; 1806 fontdata += j; 1807 } 1808 } else if (font->width <= 24) { 1809 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata)) 1810 return -EINVAL; 1811 1812 for (i = 0; i < font->charcount; i++) { 1813 for (j = 0; j < vc->vc_font.height; j++) { 1814 *data++ = fontdata[0]; 1815 *data++ = fontdata[1]; 1816 *data++ = fontdata[2]; 1817 fontdata += sizeof(u32); 1818 } 1819 memset(data, 0, 3 * (32 - j)); 1820 data += 3 * (32 - j); 1821 } 1822 } else { 1823 j = vc->vc_font.height * 4; 1824 if (font->charcount * j > FNTSIZE(fontdata)) 1825 return -EINVAL; 1826 1827 for (i = 0; i < font->charcount; i++) { 1828 memcpy(data, fontdata, j); 1829 memset(data + j, 0, 128 - j); 1830 data += 128; 1831 fontdata += j; 1832 } 1833 } 1834 return 0; 1835 } 1836 1837 /* set/clear vc_hi_font_mask and update vc attrs accordingly */ 1838 static void set_vc_hi_font(struct vc_data *vc, bool set) 1839 { 1840 if (!set) { 1841 vc->vc_hi_font_mask = 0; 1842 if (vc->vc_can_do_color) { 1843 vc->vc_complement_mask >>= 1; 1844 vc->vc_s_complement_mask >>= 1; 1845 } 1846 1847 /* ++Edmund: reorder the attribute bits */ 1848 if (vc->vc_can_do_color) { 1849 unsigned short *cp = 1850 (unsigned short *) vc->vc_origin; 1851 int count = vc->vc_screenbuf_size / 2; 1852 unsigned short c; 1853 for (; count > 0; count--, cp++) { 1854 c = scr_readw(cp); 1855 scr_writew(((c & 0xfe00) >> 1) | 1856 (c & 0xff), cp); 1857 } 1858 c = vc->vc_video_erase_char; 1859 vc->vc_video_erase_char = 1860 ((c & 0xfe00) >> 1) | (c & 0xff); 1861 vc->vc_attr >>= 1; 1862 } 1863 } else { 1864 vc->vc_hi_font_mask = 0x100; 1865 if (vc->vc_can_do_color) { 1866 vc->vc_complement_mask <<= 1; 1867 vc->vc_s_complement_mask <<= 1; 1868 } 1869 1870 /* ++Edmund: reorder the attribute bits */ 1871 { 1872 unsigned short *cp = 1873 (unsigned short *) vc->vc_origin; 1874 int count = vc->vc_screenbuf_size / 2; 1875 unsigned short c; 1876 for (; count > 0; count--, cp++) { 1877 unsigned short newc; 1878 c = scr_readw(cp); 1879 if (vc->vc_can_do_color) 1880 newc = 1881 ((c & 0xff00) << 1) | (c & 1882 0xff); 1883 else 1884 newc = c & ~0x100; 1885 scr_writew(newc, cp); 1886 } 1887 c = vc->vc_video_erase_char; 1888 if (vc->vc_can_do_color) { 1889 vc->vc_video_erase_char = 1890 ((c & 0xff00) << 1) | (c & 0xff); 1891 vc->vc_attr <<= 1; 1892 } else 1893 vc->vc_video_erase_char = c & ~0x100; 1894 } 1895 } 1896 } 1897 1898 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount, 1899 const u8 * data, int userfont) 1900 { 1901 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1902 struct fbcon_ops *ops = info->fbcon_par; 1903 struct fbcon_display *p = &fb_display[vc->vc_num]; 1904 int resize; 1905 char *old_data = NULL; 1906 1907 resize = (w != vc->vc_font.width) || (h != vc->vc_font.height); 1908 if (p->userfont) 1909 old_data = vc->vc_font.data; 1910 vc->vc_font.data = (void *)(p->fontdata = data); 1911 if ((p->userfont = userfont)) 1912 REFCOUNT(data)++; 1913 vc->vc_font.width = w; 1914 vc->vc_font.height = h; 1915 vc->vc_font.charcount = charcount; 1916 if (vc->vc_hi_font_mask && charcount == 256) 1917 set_vc_hi_font(vc, false); 1918 else if (!vc->vc_hi_font_mask && charcount == 512) 1919 set_vc_hi_font(vc, true); 1920 1921 if (resize) { 1922 int cols, rows; 1923 1924 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 1925 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 1926 cols /= w; 1927 rows /= h; 1928 vc_resize(vc, cols, rows); 1929 } else if (con_is_visible(vc) 1930 && vc->vc_mode == KD_TEXT) { 1931 fbcon_clear_margins(vc, 0); 1932 update_screen(vc); 1933 } 1934 1935 if (old_data && (--REFCOUNT(old_data) == 0)) 1936 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int)); 1937 return 0; 1938 } 1939 1940 /* 1941 * User asked to set font; we are guaranteed that 1942 * a) width and height are in range 1..32 1943 * b) charcount does not exceed 512 1944 * but lets not assume that, since someone might someday want to use larger 1945 * fonts. And charcount of 512 is small for unicode support. 1946 * 1947 * However, user space gives the font in 32 rows , regardless of 1948 * actual font height. So a new API is needed if support for larger fonts 1949 * is ever implemented. 1950 */ 1951 1952 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, 1953 unsigned int flags) 1954 { 1955 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 1956 unsigned charcount = font->charcount; 1957 int w = font->width; 1958 int h = font->height; 1959 int size; 1960 int i, csum; 1961 u8 *new_data, *data = font->data; 1962 int pitch = PITCH(font->width); 1963 1964 /* Is there a reason why fbconsole couldn't handle any charcount >256? 1965 * If not this check should be changed to charcount < 256 */ 1966 if (charcount != 256 && charcount != 512) 1967 return -EINVAL; 1968 1969 /* Make sure drawing engine can handle the font */ 1970 if (!(info->pixmap.blit_x & (1 << (font->width - 1))) || 1971 !(info->pixmap.blit_y & (1 << (font->height - 1)))) 1972 return -EINVAL; 1973 1974 /* Make sure driver can handle the font length */ 1975 if (fbcon_invalid_charcount(info, charcount)) 1976 return -EINVAL; 1977 1978 size = CALC_FONTSZ(h, pitch, charcount); 1979 1980 new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER); 1981 1982 if (!new_data) 1983 return -ENOMEM; 1984 1985 memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int)); 1986 1987 new_data += FONT_EXTRA_WORDS * sizeof(int); 1988 FNTSIZE(new_data) = size; 1989 REFCOUNT(new_data) = 0; /* usage counter */ 1990 for (i=0; i< charcount; i++) { 1991 memcpy(new_data + i*h*pitch, data + i*32*pitch, h*pitch); 1992 } 1993 1994 /* Since linux has a nice crc32 function use it for counting font 1995 * checksums. */ 1996 csum = crc32(0, new_data, size); 1997 1998 FNTSUM(new_data) = csum; 1999 /* Check if the same font is on some other console already */ 2000 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2001 struct vc_data *tmp = vc_cons[i].d; 2002 2003 if (fb_display[i].userfont && 2004 fb_display[i].fontdata && 2005 FNTSUM(fb_display[i].fontdata) == csum && 2006 FNTSIZE(fb_display[i].fontdata) == size && 2007 tmp->vc_font.width == w && 2008 !memcmp(fb_display[i].fontdata, new_data, size)) { 2009 kfree(new_data - FONT_EXTRA_WORDS * sizeof(int)); 2010 new_data = (u8 *)fb_display[i].fontdata; 2011 break; 2012 } 2013 } 2014 return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1); 2015 } 2016 2017 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name) 2018 { 2019 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2020 const struct font_desc *f; 2021 2022 if (!name) 2023 f = get_default_font(info->var.xres, info->var.yres, 2024 info->pixmap.blit_x, info->pixmap.blit_y); 2025 else if (!(f = find_font(name))) 2026 return -ENOENT; 2027 2028 font->width = f->width; 2029 font->height = f->height; 2030 return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0); 2031 } 2032 2033 static u16 palette_red[16]; 2034 static u16 palette_green[16]; 2035 static u16 palette_blue[16]; 2036 2037 static struct fb_cmap palette_cmap = { 2038 0, 16, palette_red, palette_green, palette_blue, NULL 2039 }; 2040 2041 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table) 2042 { 2043 struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]]; 2044 int i, j, k, depth; 2045 u8 val; 2046 2047 if (fbcon_is_inactive(vc, info)) 2048 return; 2049 2050 if (!con_is_visible(vc)) 2051 return; 2052 2053 depth = fb_get_color_depth(&info->var, &info->fix); 2054 if (depth > 3) { 2055 for (i = j = 0; i < 16; i++) { 2056 k = table[i]; 2057 val = vc->vc_palette[j++]; 2058 palette_red[k] = (val << 8) | val; 2059 val = vc->vc_palette[j++]; 2060 palette_green[k] = (val << 8) | val; 2061 val = vc->vc_palette[j++]; 2062 palette_blue[k] = (val << 8) | val; 2063 } 2064 palette_cmap.len = 16; 2065 palette_cmap.start = 0; 2066 /* 2067 * If framebuffer is capable of less than 16 colors, 2068 * use default palette of fbcon. 2069 */ 2070 } else 2071 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap); 2072 2073 fb_set_cmap(&palette_cmap, info); 2074 } 2075 2076 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset) 2077 { 2078 return (u16 *) (vc->vc_origin + offset); 2079 } 2080 2081 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos, 2082 int *px, int *py) 2083 { 2084 unsigned long ret; 2085 int x, y; 2086 2087 if (pos >= vc->vc_origin && pos < vc->vc_scr_end) { 2088 unsigned long offset = (pos - vc->vc_origin) / 2; 2089 2090 x = offset % vc->vc_cols; 2091 y = offset / vc->vc_cols; 2092 ret = pos + (vc->vc_cols - x) * 2; 2093 } else { 2094 /* Should not happen */ 2095 x = y = 0; 2096 ret = vc->vc_origin; 2097 } 2098 if (px) 2099 *px = x; 2100 if (py) 2101 *py = y; 2102 return ret; 2103 } 2104 2105 /* As we might be inside of softback, we may work with non-contiguous buffer, 2106 that's why we have to use a separate routine. */ 2107 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt) 2108 { 2109 while (cnt--) { 2110 u16 a = scr_readw(p); 2111 if (!vc->vc_can_do_color) 2112 a ^= 0x0800; 2113 else if (vc->vc_hi_font_mask == 0x100) 2114 a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) | 2115 (((a) & 0x0e00) << 4); 2116 else 2117 a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) | 2118 (((a) & 0x0700) << 4); 2119 scr_writew(a, p++); 2120 } 2121 } 2122 2123 void fbcon_suspended(struct fb_info *info) 2124 { 2125 struct vc_data *vc = NULL; 2126 struct fbcon_ops *ops = info->fbcon_par; 2127 2128 if (!ops || ops->currcon < 0) 2129 return; 2130 vc = vc_cons[ops->currcon].d; 2131 2132 /* Clear cursor, restore saved data */ 2133 fbcon_cursor(vc, CM_ERASE); 2134 } 2135 2136 void fbcon_resumed(struct fb_info *info) 2137 { 2138 struct vc_data *vc; 2139 struct fbcon_ops *ops = info->fbcon_par; 2140 2141 if (!ops || ops->currcon < 0) 2142 return; 2143 vc = vc_cons[ops->currcon].d; 2144 2145 update_screen(vc); 2146 } 2147 2148 static void fbcon_modechanged(struct fb_info *info) 2149 { 2150 struct fbcon_ops *ops = info->fbcon_par; 2151 struct vc_data *vc; 2152 struct fbcon_display *p; 2153 int rows, cols; 2154 2155 if (!ops || ops->currcon < 0) 2156 return; 2157 vc = vc_cons[ops->currcon].d; 2158 if (vc->vc_mode != KD_TEXT || 2159 registered_fb[con2fb_map[ops->currcon]] != info) 2160 return; 2161 2162 p = &fb_display[vc->vc_num]; 2163 set_blitting_type(vc, info); 2164 2165 if (con_is_visible(vc)) { 2166 var_to_display(p, &info->var, info); 2167 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2168 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2169 cols /= vc->vc_font.width; 2170 rows /= vc->vc_font.height; 2171 vc_resize(vc, cols, rows); 2172 updatescrollmode(p, info, vc); 2173 scrollback_max = 0; 2174 scrollback_current = 0; 2175 2176 if (!fbcon_is_inactive(vc, info)) { 2177 ops->var.xoffset = ops->var.yoffset = p->yscroll = 0; 2178 ops->update_start(info); 2179 } 2180 2181 fbcon_set_palette(vc, color_table); 2182 update_screen(vc); 2183 } 2184 } 2185 2186 static void fbcon_set_all_vcs(struct fb_info *info) 2187 { 2188 struct fbcon_ops *ops = info->fbcon_par; 2189 struct vc_data *vc; 2190 struct fbcon_display *p; 2191 int i, rows, cols, fg = -1; 2192 2193 if (!ops || ops->currcon < 0) 2194 return; 2195 2196 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2197 vc = vc_cons[i].d; 2198 if (!vc || vc->vc_mode != KD_TEXT || 2199 registered_fb[con2fb_map[i]] != info) 2200 continue; 2201 2202 if (con_is_visible(vc)) { 2203 fg = i; 2204 continue; 2205 } 2206 2207 p = &fb_display[vc->vc_num]; 2208 set_blitting_type(vc, info); 2209 var_to_display(p, &info->var, info); 2210 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres); 2211 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres); 2212 cols /= vc->vc_font.width; 2213 rows /= vc->vc_font.height; 2214 vc_resize(vc, cols, rows); 2215 } 2216 2217 if (fg != -1) 2218 fbcon_modechanged(info); 2219 } 2220 2221 2222 void fbcon_update_vcs(struct fb_info *info, bool all) 2223 { 2224 if (all) 2225 fbcon_set_all_vcs(info); 2226 else 2227 fbcon_modechanged(info); 2228 } 2229 EXPORT_SYMBOL(fbcon_update_vcs); 2230 2231 int fbcon_mode_deleted(struct fb_info *info, 2232 struct fb_videomode *mode) 2233 { 2234 struct fb_info *fb_info; 2235 struct fbcon_display *p; 2236 int i, j, found = 0; 2237 2238 /* before deletion, ensure that mode is not in use */ 2239 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2240 j = con2fb_map[i]; 2241 if (j == -1) 2242 continue; 2243 fb_info = registered_fb[j]; 2244 if (fb_info != info) 2245 continue; 2246 p = &fb_display[i]; 2247 if (!p || !p->mode) 2248 continue; 2249 if (fb_mode_is_equal(p->mode, mode)) { 2250 found = 1; 2251 break; 2252 } 2253 } 2254 return found; 2255 } 2256 2257 #ifdef CONFIG_VT_HW_CONSOLE_BINDING 2258 static void fbcon_unbind(void) 2259 { 2260 int ret; 2261 2262 ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc, 2263 fbcon_is_default); 2264 2265 if (!ret) 2266 fbcon_has_console_bind = 0; 2267 } 2268 #else 2269 static inline void fbcon_unbind(void) {} 2270 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */ 2271 2272 /* called with console_lock held */ 2273 void fbcon_fb_unbind(struct fb_info *info) 2274 { 2275 int i, new_idx = -1, ret = 0; 2276 int idx = info->node; 2277 2278 WARN_CONSOLE_UNLOCKED(); 2279 2280 if (!fbcon_has_console_bind) 2281 return; 2282 2283 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2284 if (con2fb_map[i] != idx && 2285 con2fb_map[i] != -1) { 2286 new_idx = con2fb_map[i]; 2287 break; 2288 } 2289 } 2290 2291 if (new_idx != -1) { 2292 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2293 if (con2fb_map[i] == idx) 2294 set_con2fb_map(i, new_idx, 0); 2295 } 2296 } else { 2297 struct fb_info *info = registered_fb[idx]; 2298 2299 /* This is sort of like set_con2fb_map, except it maps 2300 * the consoles to no device and then releases the 2301 * oldinfo to free memory and cancel the cursor blink 2302 * timer. I can imagine this just becoming part of 2303 * set_con2fb_map where new_idx is -1 2304 */ 2305 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2306 if (con2fb_map[i] == idx) { 2307 con2fb_map[i] = -1; 2308 if (!search_fb_in_map(idx)) { 2309 ret = con2fb_release_oldinfo(vc_cons[i].d, 2310 info, NULL, i, 2311 idx, 0); 2312 if (ret) { 2313 con2fb_map[i] = idx; 2314 return; 2315 } 2316 } 2317 } 2318 } 2319 fbcon_unbind(); 2320 } 2321 } 2322 2323 /* called with console_lock held */ 2324 void fbcon_fb_unregistered(struct fb_info *info) 2325 { 2326 int i, idx; 2327 2328 WARN_CONSOLE_UNLOCKED(); 2329 2330 if (deferred_takeover) 2331 return; 2332 2333 idx = info->node; 2334 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2335 if (con2fb_map[i] == idx) 2336 con2fb_map[i] = -1; 2337 } 2338 2339 if (idx == info_idx) { 2340 info_idx = -1; 2341 2342 for_each_registered_fb(i) { 2343 info_idx = i; 2344 break; 2345 } 2346 } 2347 2348 if (info_idx != -1) { 2349 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2350 if (con2fb_map[i] == -1) 2351 con2fb_map[i] = info_idx; 2352 } 2353 } 2354 2355 if (primary_device == idx) 2356 primary_device = -1; 2357 2358 if (!num_registered_fb) 2359 do_unregister_con_driver(&fb_con); 2360 } 2361 2362 void fbcon_remap_all(struct fb_info *info) 2363 { 2364 int i, idx = info->node; 2365 2366 console_lock(); 2367 if (deferred_takeover) { 2368 for (i = first_fb_vc; i <= last_fb_vc; i++) 2369 con2fb_map_boot[i] = idx; 2370 fbcon_map_override(); 2371 console_unlock(); 2372 return; 2373 } 2374 2375 for (i = first_fb_vc; i <= last_fb_vc; i++) 2376 set_con2fb_map(i, idx, 0); 2377 2378 if (con_is_bound(&fb_con)) { 2379 printk(KERN_INFO "fbcon: Remapping primary device, " 2380 "fb%i, to tty %i-%i\n", idx, 2381 first_fb_vc + 1, last_fb_vc + 1); 2382 info_idx = idx; 2383 } 2384 console_unlock(); 2385 } 2386 2387 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY 2388 static void fbcon_select_primary(struct fb_info *info) 2389 { 2390 if (!map_override && primary_device == -1 && 2391 fb_is_primary_device(info)) { 2392 int i; 2393 2394 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n", 2395 info->fix.id, info->node); 2396 primary_device = info->node; 2397 2398 for (i = first_fb_vc; i <= last_fb_vc; i++) 2399 con2fb_map_boot[i] = primary_device; 2400 2401 if (con_is_bound(&fb_con)) { 2402 printk(KERN_INFO "fbcon: Remapping primary device, " 2403 "fb%i, to tty %i-%i\n", info->node, 2404 first_fb_vc + 1, last_fb_vc + 1); 2405 info_idx = primary_device; 2406 } 2407 } 2408 2409 } 2410 #else 2411 static inline void fbcon_select_primary(struct fb_info *info) 2412 { 2413 return; 2414 } 2415 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */ 2416 2417 /* called with console_lock held */ 2418 int fbcon_fb_registered(struct fb_info *info) 2419 { 2420 int ret = 0, i, idx; 2421 2422 WARN_CONSOLE_UNLOCKED(); 2423 2424 idx = info->node; 2425 fbcon_select_primary(info); 2426 2427 if (deferred_takeover) { 2428 pr_info("fbcon: Deferring console take-over\n"); 2429 return 0; 2430 } 2431 2432 if (info_idx == -1) { 2433 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2434 if (con2fb_map_boot[i] == idx) { 2435 info_idx = idx; 2436 break; 2437 } 2438 } 2439 2440 if (info_idx != -1) 2441 ret = do_fbcon_takeover(1); 2442 } else { 2443 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2444 if (con2fb_map_boot[i] == idx) 2445 set_con2fb_map(i, idx, 0); 2446 } 2447 } 2448 2449 return ret; 2450 } 2451 2452 void fbcon_fb_blanked(struct fb_info *info, int blank) 2453 { 2454 struct fbcon_ops *ops = info->fbcon_par; 2455 struct vc_data *vc; 2456 2457 if (!ops || ops->currcon < 0) 2458 return; 2459 2460 vc = vc_cons[ops->currcon].d; 2461 if (vc->vc_mode != KD_TEXT || 2462 registered_fb[con2fb_map[ops->currcon]] != info) 2463 return; 2464 2465 if (con_is_visible(vc)) { 2466 if (blank) 2467 do_blank_screen(0); 2468 else 2469 do_unblank_screen(0); 2470 } 2471 ops->blank_state = blank; 2472 } 2473 2474 void fbcon_new_modelist(struct fb_info *info) 2475 { 2476 int i; 2477 struct vc_data *vc; 2478 struct fb_var_screeninfo var; 2479 const struct fb_videomode *mode; 2480 2481 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2482 if (registered_fb[con2fb_map[i]] != info) 2483 continue; 2484 if (!fb_display[i].mode) 2485 continue; 2486 vc = vc_cons[i].d; 2487 display_to_var(&var, &fb_display[i]); 2488 mode = fb_find_nearest_mode(fb_display[i].mode, 2489 &info->modelist); 2490 fb_videomode_to_var(&var, mode); 2491 fbcon_set_disp(info, &var, vc->vc_num); 2492 } 2493 } 2494 2495 void fbcon_get_requirement(struct fb_info *info, 2496 struct fb_blit_caps *caps) 2497 { 2498 struct vc_data *vc; 2499 2500 if (caps->flags) { 2501 int i, charcnt; 2502 2503 for (i = first_fb_vc; i <= last_fb_vc; i++) { 2504 vc = vc_cons[i].d; 2505 if (vc && vc->vc_mode == KD_TEXT && 2506 info->node == con2fb_map[i]) { 2507 caps->x |= 1 << (vc->vc_font.width - 1); 2508 caps->y |= 1 << (vc->vc_font.height - 1); 2509 charcnt = vc->vc_font.charcount; 2510 if (caps->len < charcnt) 2511 caps->len = charcnt; 2512 } 2513 } 2514 } else { 2515 vc = vc_cons[fg_console].d; 2516 2517 if (vc && vc->vc_mode == KD_TEXT && 2518 info->node == con2fb_map[fg_console]) { 2519 caps->x = 1 << (vc->vc_font.width - 1); 2520 caps->y = 1 << (vc->vc_font.height - 1); 2521 caps->len = vc->vc_font.charcount; 2522 } 2523 } 2524 } 2525 2526 int fbcon_set_con2fb_map_ioctl(void __user *argp) 2527 { 2528 struct fb_con2fbmap con2fb; 2529 int ret; 2530 2531 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 2532 return -EFAULT; 2533 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 2534 return -EINVAL; 2535 if (con2fb.framebuffer >= FB_MAX) 2536 return -EINVAL; 2537 if (!registered_fb[con2fb.framebuffer]) 2538 request_module("fb%d", con2fb.framebuffer); 2539 if (!registered_fb[con2fb.framebuffer]) { 2540 return -EINVAL; 2541 } 2542 2543 console_lock(); 2544 ret = set_con2fb_map(con2fb.console - 1, 2545 con2fb.framebuffer, 1); 2546 console_unlock(); 2547 2548 return ret; 2549 } 2550 2551 int fbcon_get_con2fb_map_ioctl(void __user *argp) 2552 { 2553 struct fb_con2fbmap con2fb; 2554 2555 if (copy_from_user(&con2fb, argp, sizeof(con2fb))) 2556 return -EFAULT; 2557 if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES) 2558 return -EINVAL; 2559 2560 console_lock(); 2561 con2fb.framebuffer = con2fb_map[con2fb.console - 1]; 2562 console_unlock(); 2563 2564 return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0; 2565 } 2566 2567 /* 2568 * The console `switch' structure for the frame buffer based console 2569 */ 2570 2571 static const struct consw fb_con = { 2572 .owner = THIS_MODULE, 2573 .con_startup = fbcon_startup, 2574 .con_init = fbcon_init, 2575 .con_deinit = fbcon_deinit, 2576 .con_clear = fbcon_clear, 2577 .con_putc = fbcon_putc, 2578 .con_putcs = fbcon_putcs, 2579 .con_cursor = fbcon_cursor, 2580 .con_scroll = fbcon_scroll, 2581 .con_switch = fbcon_switch, 2582 .con_blank = fbcon_blank, 2583 .con_font_set = fbcon_set_font, 2584 .con_font_get = fbcon_get_font, 2585 .con_font_default = fbcon_set_def_font, 2586 .con_set_palette = fbcon_set_palette, 2587 .con_invert_region = fbcon_invert_region, 2588 .con_screen_pos = fbcon_screen_pos, 2589 .con_getxy = fbcon_getxy, 2590 .con_resize = fbcon_resize, 2591 .con_debug_enter = fbcon_debug_enter, 2592 .con_debug_leave = fbcon_debug_leave, 2593 }; 2594 2595 static ssize_t store_rotate(struct device *device, 2596 struct device_attribute *attr, const char *buf, 2597 size_t count) 2598 { 2599 struct fb_info *info; 2600 int rotate, idx; 2601 char **last = NULL; 2602 2603 console_lock(); 2604 idx = con2fb_map[fg_console]; 2605 2606 if (idx == -1 || registered_fb[idx] == NULL) 2607 goto err; 2608 2609 info = registered_fb[idx]; 2610 rotate = simple_strtoul(buf, last, 0); 2611 fbcon_rotate(info, rotate); 2612 err: 2613 console_unlock(); 2614 return count; 2615 } 2616 2617 static ssize_t store_rotate_all(struct device *device, 2618 struct device_attribute *attr,const char *buf, 2619 size_t count) 2620 { 2621 struct fb_info *info; 2622 int rotate, idx; 2623 char **last = NULL; 2624 2625 console_lock(); 2626 idx = con2fb_map[fg_console]; 2627 2628 if (idx == -1 || registered_fb[idx] == NULL) 2629 goto err; 2630 2631 info = registered_fb[idx]; 2632 rotate = simple_strtoul(buf, last, 0); 2633 fbcon_rotate_all(info, rotate); 2634 err: 2635 console_unlock(); 2636 return count; 2637 } 2638 2639 static ssize_t show_rotate(struct device *device, 2640 struct device_attribute *attr,char *buf) 2641 { 2642 struct fb_info *info; 2643 int rotate = 0, idx; 2644 2645 console_lock(); 2646 idx = con2fb_map[fg_console]; 2647 2648 if (idx == -1 || registered_fb[idx] == NULL) 2649 goto err; 2650 2651 info = registered_fb[idx]; 2652 rotate = fbcon_get_rotate(info); 2653 err: 2654 console_unlock(); 2655 return snprintf(buf, PAGE_SIZE, "%d\n", rotate); 2656 } 2657 2658 static ssize_t show_cursor_blink(struct device *device, 2659 struct device_attribute *attr, char *buf) 2660 { 2661 struct fb_info *info; 2662 struct fbcon_ops *ops; 2663 int idx, blink = -1; 2664 2665 console_lock(); 2666 idx = con2fb_map[fg_console]; 2667 2668 if (idx == -1 || registered_fb[idx] == NULL) 2669 goto err; 2670 2671 info = registered_fb[idx]; 2672 ops = info->fbcon_par; 2673 2674 if (!ops) 2675 goto err; 2676 2677 blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0; 2678 err: 2679 console_unlock(); 2680 return snprintf(buf, PAGE_SIZE, "%d\n", blink); 2681 } 2682 2683 static ssize_t store_cursor_blink(struct device *device, 2684 struct device_attribute *attr, 2685 const char *buf, size_t count) 2686 { 2687 struct fb_info *info; 2688 int blink, idx; 2689 char **last = NULL; 2690 2691 console_lock(); 2692 idx = con2fb_map[fg_console]; 2693 2694 if (idx == -1 || registered_fb[idx] == NULL) 2695 goto err; 2696 2697 info = registered_fb[idx]; 2698 2699 if (!info->fbcon_par) 2700 goto err; 2701 2702 blink = simple_strtoul(buf, last, 0); 2703 2704 if (blink) { 2705 fbcon_cursor_noblink = 0; 2706 fbcon_add_cursor_timer(info); 2707 } else { 2708 fbcon_cursor_noblink = 1; 2709 fbcon_del_cursor_timer(info); 2710 } 2711 2712 err: 2713 console_unlock(); 2714 return count; 2715 } 2716 2717 static struct device_attribute device_attrs[] = { 2718 __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate), 2719 __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all), 2720 __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink, 2721 store_cursor_blink), 2722 }; 2723 2724 static int fbcon_init_device(void) 2725 { 2726 int i, error = 0; 2727 2728 fbcon_has_sysfs = 1; 2729 2730 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) { 2731 error = device_create_file(fbcon_device, &device_attrs[i]); 2732 2733 if (error) 2734 break; 2735 } 2736 2737 if (error) { 2738 while (--i >= 0) 2739 device_remove_file(fbcon_device, &device_attrs[i]); 2740 2741 fbcon_has_sysfs = 0; 2742 } 2743 2744 return 0; 2745 } 2746 2747 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 2748 static void fbcon_register_existing_fbs(struct work_struct *work) 2749 { 2750 int i; 2751 2752 console_lock(); 2753 2754 for_each_registered_fb(i) 2755 fbcon_fb_registered(registered_fb[i]); 2756 2757 console_unlock(); 2758 } 2759 2760 static struct notifier_block fbcon_output_nb; 2761 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs); 2762 2763 static int fbcon_output_notifier(struct notifier_block *nb, 2764 unsigned long action, void *data) 2765 { 2766 WARN_CONSOLE_UNLOCKED(); 2767 2768 pr_info("fbcon: Taking over console\n"); 2769 2770 dummycon_unregister_output_notifier(&fbcon_output_nb); 2771 deferred_takeover = false; 2772 logo_shown = FBCON_LOGO_DONTSHOW; 2773 2774 /* We may get called in atomic context */ 2775 schedule_work(&fbcon_deferred_takeover_work); 2776 2777 return NOTIFY_OK; 2778 } 2779 #endif 2780 2781 static void fbcon_start(void) 2782 { 2783 WARN_CONSOLE_UNLOCKED(); 2784 2785 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 2786 if (conswitchp != &dummy_con) 2787 deferred_takeover = false; 2788 2789 if (deferred_takeover) { 2790 fbcon_output_nb.notifier_call = fbcon_output_notifier; 2791 dummycon_register_output_notifier(&fbcon_output_nb); 2792 return; 2793 } 2794 #endif 2795 2796 if (num_registered_fb) { 2797 int i; 2798 2799 for_each_registered_fb(i) { 2800 info_idx = i; 2801 break; 2802 } 2803 2804 do_fbcon_takeover(0); 2805 } 2806 } 2807 2808 static void fbcon_exit(void) 2809 { 2810 struct fb_info *info; 2811 int i, j, mapped; 2812 2813 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER 2814 if (deferred_takeover) { 2815 dummycon_unregister_output_notifier(&fbcon_output_nb); 2816 deferred_takeover = false; 2817 } 2818 #endif 2819 2820 for_each_registered_fb(i) { 2821 int pending = 0; 2822 2823 mapped = 0; 2824 info = registered_fb[i]; 2825 2826 if (info->queue.func) 2827 pending = cancel_work_sync(&info->queue); 2828 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no")); 2829 2830 for (j = first_fb_vc; j <= last_fb_vc; j++) { 2831 if (con2fb_map[j] == i) { 2832 mapped = 1; 2833 con2fb_map[j] = -1; 2834 } 2835 } 2836 2837 if (mapped) { 2838 if (info->fbops->fb_release) 2839 info->fbops->fb_release(info, 0); 2840 module_put(info->fbops->owner); 2841 2842 if (info->fbcon_par) { 2843 struct fbcon_ops *ops = info->fbcon_par; 2844 2845 fbcon_del_cursor_timer(info); 2846 kfree(ops->cursor_src); 2847 kfree(ops->cursor_state.mask); 2848 kfree(info->fbcon_par); 2849 info->fbcon_par = NULL; 2850 } 2851 2852 if (info->queue.func == fb_flashcursor) 2853 info->queue.func = NULL; 2854 } 2855 } 2856 } 2857 2858 void __init fb_console_init(void) 2859 { 2860 int i; 2861 2862 console_lock(); 2863 fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL, 2864 "fbcon"); 2865 2866 if (IS_ERR(fbcon_device)) { 2867 printk(KERN_WARNING "Unable to create device " 2868 "for fbcon; errno = %ld\n", 2869 PTR_ERR(fbcon_device)); 2870 fbcon_device = NULL; 2871 } else 2872 fbcon_init_device(); 2873 2874 for (i = 0; i < MAX_NR_CONSOLES; i++) 2875 con2fb_map[i] = -1; 2876 2877 fbcon_start(); 2878 console_unlock(); 2879 } 2880 2881 #ifdef MODULE 2882 2883 static void __exit fbcon_deinit_device(void) 2884 { 2885 int i; 2886 2887 if (fbcon_has_sysfs) { 2888 for (i = 0; i < ARRAY_SIZE(device_attrs); i++) 2889 device_remove_file(fbcon_device, &device_attrs[i]); 2890 2891 fbcon_has_sysfs = 0; 2892 } 2893 } 2894 2895 void __exit fb_console_exit(void) 2896 { 2897 console_lock(); 2898 fbcon_deinit_device(); 2899 device_destroy(fb_class, MKDEV(0, 0)); 2900 fbcon_exit(); 2901 do_unregister_con_driver(&fb_con); 2902 console_unlock(); 2903 } 2904 #endif 2905