drivers/video/fbdev/core/fbcon.c

   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 void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 177                         int height, int width);
 178 static int fbcon_switch(struct vc_data *vc);
 179 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 180 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
 181
 182 /*
 183  *  Internal routines
 184  */
 185 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 186 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 187 static __inline__ void ypan_up(struct vc_data *vc, int count);
 188 static __inline__ void ypan_down(struct vc_data *vc, int count);
 189 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 190                             int dy, int dx, int height, int width, u_int y_break);
 191 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 192                            int unit);
 193 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 194                               int line, int count, int dy);
 195 static void fbcon_modechanged(struct fb_info *info);
 196 static void fbcon_set_all_vcs(struct fb_info *info);
 197 static void fbcon_start(void);
 198 static void fbcon_exit(void);
 199 static struct device *fbcon_device;
 200
 201 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 202 static inline void fbcon_set_rotation(struct fb_info *info)
 203 {
 204         struct fbcon_ops *ops = info->fbcon_par;
 205
 206         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 207             ops->p->con_rotate < 4)
 208                 ops->rotate = ops->p->con_rotate;
 209         else
 210                 ops->rotate = 0;
 211 }
 212
 213 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 214 {
 215         struct fbcon_ops *ops= info->fbcon_par;
 216         struct fb_info *fb_info;
 217
 218         if (!ops || ops->currcon == -1)
 219                 return;
 220
 221         fb_info = registered_fb[con2fb_map[ops->currcon]];
 222
 223         if (info == fb_info) {
 224                 struct fbcon_display *p = &fb_display[ops->currcon];
 225
 226                 if (rotate < 4)
 227                         p->con_rotate = rotate;
 228                 else
 229                         p->con_rotate = 0;
 230
 231                 fbcon_modechanged(info);
 232         }
 233 }
 234
 235 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 236 {
 237         struct fbcon_ops *ops = info->fbcon_par;
 238         struct vc_data *vc;
 239         struct fbcon_display *p;
 240         int i;
 241
 242         if (!ops || ops->currcon < 0 || rotate > 3)
 243                 return;
 244
 245         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 246                 vc = vc_cons[i].d;
 247                 if (!vc || vc->vc_mode != KD_TEXT ||
 248                     registered_fb[con2fb_map[i]] != info)
 249                         continue;
 250
 251                 p = &fb_display[vc->vc_num];
 252                 p->con_rotate = rotate;
 253         }
 254
 255         fbcon_set_all_vcs(info);
 256 }
 257 #else
 258 static inline void fbcon_set_rotation(struct fb_info *info)
 259 {
 260         struct fbcon_ops *ops = info->fbcon_par;
 261
 262         ops->rotate = FB_ROTATE_UR;
 263 }
 264
 265 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 266 {
 267         return;
 268 }
 269
 270 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 271 {
 272         return;
 273 }
 274 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 275
 276 static int fbcon_get_rotate(struct fb_info *info)
 277 {
 278         struct fbcon_ops *ops = info->fbcon_par;
 279
 280         return (ops) ? ops->rotate : 0;
 281 }
 282
 283 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 284 {
 285         struct fbcon_ops *ops = info->fbcon_par;
 286
 287         return (info->state != FBINFO_STATE_RUNNING ||
 288                 vc->vc_mode != KD_TEXT || ops->graphics);
 289 }
 290
 291 static int get_color(struct vc_data *vc, struct fb_info *info,
 292               u16 c, int is_fg)
 293 {
 294         int depth = fb_get_color_depth(&info->var, &info->fix);
 295         int color = 0;
 296
 297         if (console_blanked) {
 298                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 299
 300                 c = vc->vc_video_erase_char & charmask;
 301         }
 302
 303         if (depth != 1)
 304                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 305                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 306
 307         switch (depth) {
 308         case 1:
 309         {
 310                 int col = mono_col(info);
 311                 /* 0 or 1 */
 312                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 313                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 314
 315                 if (console_blanked)
 316                         fg = bg;
 317
 318                 color = (is_fg) ? fg : bg;
 319                 break;
 320         }
 321         case 2:
 322                 /*
 323                  * Scale down 16-colors to 4 colors. Default 4-color palette
 324                  * is grayscale. However, simply dividing the values by 4
 325                  * will not work, as colors 1, 2 and 3 will be scaled-down
 326                  * to zero rendering them invisible.  So empirically convert
 327                  * colors to a sane 4-level grayscale.
 328                  */
 329                 switch (color) {
 330                 case 0:
 331                         color = 0; /* black */
 332                         break;
 333                 case 1 ... 6:
 334                         color = 2; /* white */
 335                         break;
 336                 case 7 ... 8:
 337                         color = 1; /* gray */
 338                         break;
 339                 default:
 340                         color = 3; /* intense white */
 341                         break;
 342                 }
 343                 break;
 344         case 3:
 345                 /*
 346                  * Last 8 entries of default 16-color palette is a more intense
 347                  * version of the first 8 (i.e., same chrominance, different
 348                  * luminance).
 349                  */
 350                 color &= 7;
 351                 break;
 352         }
 353
 354
 355         return color;
 356 }
 357
 358 static void fb_flashcursor(struct work_struct *work)
 359 {
 360         struct fb_info *info = container_of(work, struct fb_info, queue);
 361         struct fbcon_ops *ops = info->fbcon_par;
 362         struct vc_data *vc = NULL;
 363         int c;
 364         int mode;
 365         int ret;
 366
 367         /* FIXME: we should sort out the unbind locking instead */
 368         /* instead we just fail to flash the cursor if we can't get
 369          * the lock instead of blocking fbcon deinit */
 370         ret = console_trylock();
 371         if (ret == 0)
 372                 return;
 373
 374         if (ops && ops->currcon != -1)
 375                 vc = vc_cons[ops->currcon].d;
 376
 377         if (!vc || !con_is_visible(vc) ||
 378             registered_fb[con2fb_map[vc->vc_num]] != info ||
 379             vc->vc_deccm != 1) {
 380                 console_unlock();
 381                 return;
 382         }
 383
 384         c = scr_readw((u16 *) vc->vc_pos);
 385         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 386                 CM_ERASE : CM_DRAW;
 387         ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
 388                     get_color(vc, info, c, 0));
 389         console_unlock();
 390 }
 391
 392 static void cursor_timer_handler(struct timer_list *t)
 393 {
 394         struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
 395         struct fb_info *info = ops->info;
 396
 397         queue_work(system_power_efficient_wq, &info->queue);
 398         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 399 }
 400
 401 static void fbcon_add_cursor_timer(struct fb_info *info)
 402 {
 403         struct fbcon_ops *ops = info->fbcon_par;
 404
 405         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 406             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 407             !fbcon_cursor_noblink) {
 408                 if (!info->queue.func)
 409                         INIT_WORK(&info->queue, fb_flashcursor);
 410
 411                 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
 412                 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 413                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 414         }
 415 }
 416
 417 static void fbcon_del_cursor_timer(struct fb_info *info)
 418 {
 419         struct fbcon_ops *ops = info->fbcon_par;
 420
 421         if (info->queue.func == fb_flashcursor &&
 422             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 423                 del_timer_sync(&ops->cursor_timer);
 424                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 425         }
 426 }
 427
 428 #ifndef MODULE
 429 static int __init fb_console_setup(char *this_opt)
 430 {
 431         char *options;
 432         int i, j;
 433
 434         if (!this_opt || !*this_opt)
 435                 return 1;
 436
 437         while ((options = strsep(&this_opt, ",")) != NULL) {
 438                 if (!strncmp(options, "font:", 5)) {
 439                         strlcpy(fontname, options + 5, sizeof(fontname));
 440                         continue;
 441                 }
 442
 443                 if (!strncmp(options, "scrollback:", 11)) {
 444                         pr_warn("Ignoring scrollback size option\n");
 445                         continue;
 446                 }
 447
 448                 if (!strncmp(options, "map:", 4)) {
 449                         options += 4;
 450                         if (*options) {
 451                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 452                                         if (!options[j])
 453                                                 j = 0;
 454                                         con2fb_map_boot[i] =
 455                                                 (options[j++]-'0') % FB_MAX;
 456                                 }
 457
 458                                 fbcon_map_override();
 459                         }
 460                         continue;
 461                 }
 462
 463                 if (!strncmp(options, "vc:", 3)) {
 464                         options += 3;
 465                         if (*options)
 466                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 467                         if (first_fb_vc < 0)
 468                                 first_fb_vc = 0;
 469                         if (*options++ == '-')
 470                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 471                         fbcon_is_default = 0;
 472                         continue;
 473                 }
 474
 475                 if (!strncmp(options, "rotate:", 7)) {
 476                         options += 7;
 477                         if (*options)
 478                                 initial_rotation = simple_strtoul(options, &options, 0);
 479                         if (initial_rotation > 3)
 480                                 initial_rotation = 0;
 481                         continue;
 482                 }
 483
 484                 if (!strncmp(options, "margin:", 7)) {
 485                         options += 7;
 486                         if (*options)
 487                                 margin_color = simple_strtoul(options, &options, 0);
 488                         continue;
 489                 }
 490 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 491                 if (!strcmp(options, "nodefer")) {
 492                         deferred_takeover = false;
 493                         continue;
 494                 }
 495 #endif
 496
 497                 if (!strncmp(options, "logo-pos:", 9)) {
 498                         options += 9;
 499                         if (!strcmp(options, "center"))
 500                                 fb_center_logo = true;
 501                         continue;
 502                 }
 503
 504                 if (!strncmp(options, "logo-count:", 11)) {
 505                         options += 11;
 506                         if (*options)
 507                                 fb_logo_count = simple_strtol(options, &options, 0);
 508                         continue;
 509                 }
 510         }
 511         return 1;
 512 }
 513
 514 __setup("fbcon=", fb_console_setup);
 515 #endif
 516
 517 static int search_fb_in_map(int idx)
 518 {
 519         int i, retval = 0;
 520
 521         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 522                 if (con2fb_map[i] == idx)
 523                         retval = 1;
 524         }
 525         return retval;
 526 }
 527
 528 static int search_for_mapped_con(void)
 529 {
 530         int i, retval = 0;
 531
 532         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 533                 if (con2fb_map[i] != -1)
 534                         retval = 1;
 535         }
 536         return retval;
 537 }
 538
 539 static int do_fbcon_takeover(int show_logo)
 540 {
 541         int err, i;
 542
 543         if (!num_registered_fb)
 544                 return -ENODEV;
 545
 546         if (!show_logo)
 547                 logo_shown = FBCON_LOGO_DONTSHOW;
 548
 549         for (i = first_fb_vc; i <= last_fb_vc; i++)
 550                 con2fb_map[i] = info_idx;
 551
 552         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 553                                 fbcon_is_default);
 554
 555         if (err) {
 556                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 557                         con2fb_map[i] = -1;
 558                 info_idx = -1;
 559         } else {
 560                 fbcon_has_console_bind = 1;
 561         }
 562
 563         return err;
 564 }
 565
 566 #ifdef MODULE
 567 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 568                                int cols, int rows, int new_cols, int new_rows)
 569 {
 570         logo_shown = FBCON_LOGO_DONTSHOW;
 571 }
 572 #else
 573 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 574                                int cols, int rows, int new_cols, int new_rows)
 575 {
 576         /* Need to make room for the logo */
 577         struct fbcon_ops *ops = info->fbcon_par;
 578         int cnt, erase = vc->vc_video_erase_char, step;
 579         unsigned short *save = NULL, *r, *q;
 580         int logo_height;
 581
 582         if (info->fbops->owner) {
 583                 logo_shown = FBCON_LOGO_DONTSHOW;
 584                 return;
 585         }
 586
 587         /*
 588          * remove underline attribute from erase character
 589          * if black and white framebuffer.
 590          */
 591         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 592                 erase &= ~0x400;
 593         logo_height = fb_prepare_logo(info, ops->rotate);
 594         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 595         q = (unsigned short *) (vc->vc_origin +
 596                                 vc->vc_size_row * rows);
 597         step = logo_lines * cols;
 598         for (r = q - logo_lines * cols; r < q; r++)
 599                 if (scr_readw(r) != vc->vc_video_erase_char)
 600                         break;
 601         if (r != q && new_rows >= rows + logo_lines) {
 602                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 603                                GFP_KERNEL);
 604                 if (save) {
 605                         int i = cols < new_cols ? cols : new_cols;
 606                         scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
 607                         r = q - step;
 608                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 609                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 610                         r = q;
 611                 }
 612         }
 613         if (r == q) {
 614                 /* We can scroll screen down */
 615                 r = q - step - cols;
 616                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 617                         scr_memcpyw(r + step, r, vc->vc_size_row);
 618                         r -= cols;
 619                 }
 620                 if (!save) {
 621                         int lines;
 622                         if (vc->state.y + logo_lines >= rows)
 623                                 lines = rows - vc->state.y - 1;
 624                         else
 625                                 lines = logo_lines;
 626                         vc->state.y += lines;
 627                         vc->vc_pos += lines * vc->vc_size_row;
 628                 }
 629         }
 630         scr_memsetw((unsigned short *) vc->vc_origin,
 631                     erase,
 632                     vc->vc_size_row * logo_lines);
 633
 634         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 635                 fbcon_clear_margins(vc, 0);
 636                 update_screen(vc);
 637         }
 638
 639         if (save) {
 640                 q = (unsigned short *) (vc->vc_origin +
 641                                         vc->vc_size_row *
 642                                         rows);
 643                 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
 644                 vc->state.y += logo_lines;
 645                 vc->vc_pos += logo_lines * vc->vc_size_row;
 646                 kfree(save);
 647         }
 648
 649         if (logo_shown == FBCON_LOGO_DONTSHOW)
 650                 return;
 651
 652         if (logo_lines > vc->vc_bottom) {
 653                 logo_shown = FBCON_LOGO_CANSHOW;
 654                 printk(KERN_INFO
 655                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 656         } else {
 657                 logo_shown = FBCON_LOGO_DRAW;
 658                 vc->vc_top = logo_lines;
 659         }
 660 }
 661 #endif /* MODULE */
 662
 663 #ifdef CONFIG_FB_TILEBLITTING
 664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 665 {
 666         struct fbcon_ops *ops = info->fbcon_par;
 667
 668         ops->p = &fb_display[vc->vc_num];
 669
 670         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 671                 fbcon_set_tileops(vc, info);
 672         else {
 673                 fbcon_set_rotation(info);
 674                 fbcon_set_bitops(ops);
 675         }
 676 }
 677
 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 679 {
 680         int err = 0;
 681
 682         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 683             info->tileops->fb_get_tilemax(info) < charcount)
 684                 err = 1;
 685
 686         return err;
 687 }
 688 #else
 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 690 {
 691         struct fbcon_ops *ops = info->fbcon_par;
 692
 693         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 694         ops->p = &fb_display[vc->vc_num];
 695         fbcon_set_rotation(info);
 696         fbcon_set_bitops(ops);
 697 }
 698
 699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 700 {
 701         return 0;
 702 }
 703
 704 #endif /* CONFIG_MISC_TILEBLITTING */
 705
 706
 707 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 708                                   int unit, int oldidx)
 709 {
 710         struct fbcon_ops *ops = NULL;
 711         int err = 0;
 712
 713         if (!try_module_get(info->fbops->owner))
 714                 err = -ENODEV;
 715
 716         if (!err && info->fbops->fb_open &&
 717             info->fbops->fb_open(info, 0))
 718                 err = -ENODEV;
 719
 720         if (!err) {
 721                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 722                 if (!ops)
 723                         err = -ENOMEM;
 724         }
 725
 726         if (!err) {
 727                 ops->cur_blink_jiffies = HZ / 5;
 728                 ops->info = info;
 729                 info->fbcon_par = ops;
 730
 731                 if (vc)
 732                         set_blitting_type(vc, info);
 733         }
 734
 735         if (err) {
 736                 con2fb_map[unit] = oldidx;
 737                 module_put(info->fbops->owner);
 738         }
 739
 740         return err;
 741 }
 742
 743 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 744                                   struct fb_info *newinfo, int unit,
 745                                   int oldidx, int found)
 746 {
 747         struct fbcon_ops *ops = oldinfo->fbcon_par;
 748         int err = 0, ret;
 749
 750         if (oldinfo->fbops->fb_release &&
 751             oldinfo->fbops->fb_release(oldinfo, 0)) {
 752                 con2fb_map[unit] = oldidx;
 753                 if (!found && newinfo->fbops->fb_release)
 754                         newinfo->fbops->fb_release(newinfo, 0);
 755                 if (!found)
 756                         module_put(newinfo->fbops->owner);
 757                 err = -ENODEV;
 758         }
 759
 760         if (!err) {
 761                 fbcon_del_cursor_timer(oldinfo);
 762                 kfree(ops->cursor_state.mask);
 763                 kfree(ops->cursor_data);
 764                 kfree(ops->cursor_src);
 765                 kfree(ops->fontbuffer);
 766                 kfree(oldinfo->fbcon_par);
 767                 oldinfo->fbcon_par = NULL;
 768                 module_put(oldinfo->fbops->owner);
 769                 /*
 770                   If oldinfo and newinfo are driving the same hardware,
 771                   the fb_release() method of oldinfo may attempt to
 772                   restore the hardware state.  This will leave the
 773                   newinfo in an undefined state. Thus, a call to
 774                   fb_set_par() may be needed for the newinfo.
 775                 */
 776                 if (newinfo && newinfo->fbops->fb_set_par) {
 777                         ret = newinfo->fbops->fb_set_par(newinfo);
 778
 779                         if (ret)
 780                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 781                                         "detected unhandled fb_set_par error, "
 782                                         "error code %d\n", ret);
 783                 }
 784         }
 785
 786         return err;
 787 }
 788
 789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 790                                 int unit, int show_logo)
 791 {
 792         struct fbcon_ops *ops = info->fbcon_par;
 793         int ret;
 794
 795         ops->currcon = fg_console;
 796
 797         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 798                 ret = info->fbops->fb_set_par(info);
 799
 800                 if (ret)
 801                         printk(KERN_ERR "con2fb_init_display: detected "
 802                                 "unhandled fb_set_par error, "
 803                                 "error code %d\n", ret);
 804         }
 805
 806         ops->flags |= FBCON_FLAGS_INIT;
 807         ops->graphics = 0;
 808         fbcon_set_disp(info, &info->var, unit);
 809
 810         if (show_logo) {
 811                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 812                 struct fb_info *fg_info =
 813                         registered_fb[con2fb_map[fg_console]];
 814
 815                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 816                                    fg_vc->vc_rows, fg_vc->vc_cols,
 817                                    fg_vc->vc_rows);
 818         }
 819
 820         update_screen(vc_cons[fg_console].d);
 821 }
 822
 823 /**
 824  *      set_con2fb_map - map console to frame buffer device
 825  *      @unit: virtual console number to map
 826  *      @newidx: frame buffer index to map virtual console to
 827  *      @user: user request
 828  *
 829  *      Maps a virtual console @unit to a frame buffer device
 830  *      @newidx.
 831  *
 832  *      This should be called with the console lock held.
 833  */
 834 static int set_con2fb_map(int unit, int newidx, int user)
 835 {
 836         struct vc_data *vc = vc_cons[unit].d;
 837         int oldidx = con2fb_map[unit];
 838         struct fb_info *info = registered_fb[newidx];
 839         struct fb_info *oldinfo = NULL;
 840         int found, err = 0;
 841
 842         WARN_CONSOLE_UNLOCKED();
 843
 844         if (oldidx == newidx)
 845                 return 0;
 846
 847         if (!info)
 848                 return -EINVAL;
 849
 850         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 851                 info_idx = newidx;
 852                 return do_fbcon_takeover(0);
 853         }
 854
 855         if (oldidx != -1)
 856                 oldinfo = registered_fb[oldidx];
 857
 858         found = search_fb_in_map(newidx);
 859
 860         con2fb_map[unit] = newidx;
 861         if (!err && !found)
 862                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 863
 864         /*
 865          * If old fb is not mapped to any of the consoles,
 866          * fbcon should release it.
 867          */
 868         if (!err && oldinfo && !search_fb_in_map(oldidx))
 869                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 870                                              found);
 871
 872         if (!err) {
 873                 int show_logo = (fg_console == 0 && !user &&
 874                                  logo_shown != FBCON_LOGO_DONTSHOW);
 875
 876                 if (!found)
 877                         fbcon_add_cursor_timer(info);
 878                 con2fb_map_boot[unit] = newidx;
 879                 con2fb_init_display(vc, info, unit, show_logo);
 880         }
 881
 882         if (!search_fb_in_map(info_idx))
 883                 info_idx = newidx;
 884
 885         return err;
 886 }
 887
 888 /*
 889  *  Low Level Operations
 890  */
 891 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 892 static int var_to_display(struct fbcon_display *disp,
 893                           struct fb_var_screeninfo *var,
 894                           struct fb_info *info)
 895 {
 896         disp->xres_virtual = var->xres_virtual;
 897         disp->yres_virtual = var->yres_virtual;
 898         disp->bits_per_pixel = var->bits_per_pixel;
 899         disp->grayscale = var->grayscale;
 900         disp->nonstd = var->nonstd;
 901         disp->accel_flags = var->accel_flags;
 902         disp->height = var->height;
 903         disp->width = var->width;
 904         disp->red = var->red;
 905         disp->green = var->green;
 906         disp->blue = var->blue;
 907         disp->transp = var->transp;
 908         disp->rotate = var->rotate;
 909         disp->mode = fb_match_mode(var, &info->modelist);
 910         if (disp->mode == NULL)
 911                 /* This should not happen */
 912                 return -EINVAL;
 913         return 0;
 914 }
 915
 916 static void display_to_var(struct fb_var_screeninfo *var,
 917                            struct fbcon_display *disp)
 918 {
 919         fb_videomode_to_var(var, disp->mode);
 920         var->xres_virtual = disp->xres_virtual;
 921         var->yres_virtual = disp->yres_virtual;
 922         var->bits_per_pixel = disp->bits_per_pixel;
 923         var->grayscale = disp->grayscale;
 924         var->nonstd = disp->nonstd;
 925         var->accel_flags = disp->accel_flags;
 926         var->height = disp->height;
 927         var->width = disp->width;
 928         var->red = disp->red;
 929         var->green = disp->green;
 930         var->blue = disp->blue;
 931         var->transp = disp->transp;
 932         var->rotate = disp->rotate;
 933 }
 934
 935 static const char *fbcon_startup(void)
 936 {
 937         const char *display_desc = "frame buffer device";
 938         struct fbcon_display *p = &fb_display[fg_console];
 939         struct vc_data *vc = vc_cons[fg_console].d;
 940         const struct font_desc *font = NULL;
 941         struct module *owner;
 942         struct fb_info *info = NULL;
 943         struct fbcon_ops *ops;
 944         int rows, cols;
 945
 946         /*
 947          *  If num_registered_fb is zero, this is a call for the dummy part.
 948          *  The frame buffer devices weren't initialized yet.
 949          */
 950         if (!num_registered_fb || info_idx == -1)
 951                 return display_desc;
 952         /*
 953          * Instead of blindly using registered_fb[0], we use info_idx, set by
 954          * fb_console_init();
 955          */
 956         info = registered_fb[info_idx];
 957         if (!info)
 958                 return NULL;
 959
 960         owner = info->fbops->owner;
 961         if (!try_module_get(owner))
 962                 return NULL;
 963         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 964                 module_put(owner);
 965                 return NULL;
 966         }
 967
 968         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 969         if (!ops) {
 970                 module_put(owner);
 971                 return NULL;
 972         }
 973
 974         ops->currcon = -1;
 975         ops->graphics = 1;
 976         ops->cur_rotate = -1;
 977         ops->cur_blink_jiffies = HZ / 5;
 978         ops->info = info;
 979         info->fbcon_par = ops;
 980
 981         p->con_rotate = initial_rotation;
 982         if (p->con_rotate == -1)
 983                 p->con_rotate = info->fbcon_rotate_hint;
 984         if (p->con_rotate == -1)
 985                 p->con_rotate = FB_ROTATE_UR;
 986
 987         set_blitting_type(vc, info);
 988
 989         /* Setup default font */
 990         if (!p->fontdata && !vc->vc_font.data) {
 991                 if (!fontname[0] || !(font = find_font(fontname)))
 992                         font = get_default_font(info->var.xres,
 993                                                 info->var.yres,
 994                                                 info->pixmap.blit_x,
 995                                                 info->pixmap.blit_y);
 996                 vc->vc_font.width = font->width;
 997                 vc->vc_font.height = font->height;
 998                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 999                 vc->vc_font.charcount = font->charcount;
1000         } else {
1001                 p->fontdata = vc->vc_font.data;
1002         }
1003
1004         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1005         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1006         cols /= vc->vc_font.width;
1007         rows /= vc->vc_font.height;
1008         vc_resize(vc, cols, rows);
1009
1010         pr_debug("mode:   %s\n", info->fix.id);
1011         pr_debug("visual: %d\n", info->fix.visual);
1012         pr_debug("res:    %dx%d-%d\n", info->var.xres,
1013                  info->var.yres,
1014                  info->var.bits_per_pixel);
1015
1016         fbcon_add_cursor_timer(info);
1017         return display_desc;
1018 }
1019
1020 static void fbcon_init(struct vc_data *vc, int init)
1021 {
1022         struct fb_info *info;
1023         struct fbcon_ops *ops;
1024         struct vc_data **default_mode = vc->vc_display_fg;
1025         struct vc_data *svc = *default_mode;
1026         struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1027         int logo = 1, new_rows, new_cols, rows, cols;
1028         int ret;
1029
1030         if (WARN_ON(info_idx == -1))
1031             return;
1032
1033         if (con2fb_map[vc->vc_num] == -1)
1034                 con2fb_map[vc->vc_num] = info_idx;
1035
1036         info = registered_fb[con2fb_map[vc->vc_num]];
1037
1038         if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1039                 logo_shown = FBCON_LOGO_DONTSHOW;
1040
1041         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1042             (info->fix.type == FB_TYPE_TEXT))
1043                 logo = 0;
1044
1045         if (var_to_display(p, &info->var, info))
1046                 return;
1047
1048         if (!info->fbcon_par)
1049                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1050
1051         /* If we are not the first console on this
1052            fb, copy the font from that console */
1053         t = &fb_display[fg_console];
1054         if (!p->fontdata) {
1055                 if (t->fontdata) {
1056                         struct vc_data *fvc = vc_cons[fg_console].d;
1057
1058                         vc->vc_font.data = (void *)(p->fontdata =
1059                                                     fvc->vc_font.data);
1060                         vc->vc_font.width = fvc->vc_font.width;
1061                         vc->vc_font.height = fvc->vc_font.height;
1062                         vc->vc_font.charcount = fvc->vc_font.charcount;
1063                         p->userfont = t->userfont;
1064
1065                         if (p->userfont)
1066                                 REFCOUNT(p->fontdata)++;
1067                 } else {
1068                         const struct font_desc *font = NULL;
1069
1070                         if (!fontname[0] || !(font = find_font(fontname)))
1071                                 font = get_default_font(info->var.xres,
1072                                                         info->var.yres,
1073                                                         info->pixmap.blit_x,
1074                                                         info->pixmap.blit_y);
1075                         vc->vc_font.width = font->width;
1076                         vc->vc_font.height = font->height;
1077                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1078                         vc->vc_font.charcount = font->charcount;
1079                 }
1080         }
1081
1082         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084         if (vc->vc_font.charcount == 256) {
1085                 vc->vc_hi_font_mask = 0;
1086         } else {
1087                 vc->vc_hi_font_mask = 0x100;
1088                 if (vc->vc_can_do_color)
1089                         vc->vc_complement_mask <<= 1;
1090         }
1091
1092         if (!*svc->vc_uni_pagedir_loc)
1093                 con_set_default_unimap(svc);
1094         if (!*vc->vc_uni_pagedir_loc)
1095                 con_copy_unimap(vc, svc);
1096
1097         ops = info->fbcon_par;
1098         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1099
1100         p->con_rotate = initial_rotation;
1101         if (p->con_rotate == -1)
1102                 p->con_rotate = info->fbcon_rotate_hint;
1103         if (p->con_rotate == -1)
1104                 p->con_rotate = FB_ROTATE_UR;
1105
1106         set_blitting_type(vc, info);
1107
1108         cols = vc->vc_cols;
1109         rows = vc->vc_rows;
1110         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1111         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1112         new_cols /= vc->vc_font.width;
1113         new_rows /= vc->vc_font.height;
1114
1115         /*
1116          * We must always set the mode. The mode of the previous console
1117          * driver could be in the same resolution but we are using different
1118          * hardware so we have to initialize the hardware.
1119          *
1120          * We need to do it in fbcon_init() to prevent screen corruption.
1121          */
1122         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1123                 if (info->fbops->fb_set_par &&
1124                     !(ops->flags & FBCON_FLAGS_INIT)) {
1125                         ret = info->fbops->fb_set_par(info);
1126
1127                         if (ret)
1128                                 printk(KERN_ERR "fbcon_init: detected "
1129                                         "unhandled fb_set_par error, "
1130                                         "error code %d\n", ret);
1131                 }
1132
1133                 ops->flags |= FBCON_FLAGS_INIT;
1134         }
1135
1136         ops->graphics = 0;
1137
1138         /*
1139          * No more hw acceleration for fbcon.
1140          *
1141          * FIXME: Garbage collect all the now dead code after sufficient time
1142          * has passed.
1143          */
1144         p->scrollmode = SCROLL_REDRAW;
1145
1146         /*
1147          *  ++guenther: console.c:vc_allocate() relies on initializing
1148          *  vc_{cols,rows}, but we must not set those if we are only
1149          *  resizing the console.
1150          */
1151         if (init) {
1152                 vc->vc_cols = new_cols;
1153                 vc->vc_rows = new_rows;
1154         } else
1155                 vc_resize(vc, new_cols, new_rows);
1156
1157         if (logo)
1158                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1159
1160         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1161                 ops->rotate = FB_ROTATE_UR;
1162                 set_blitting_type(vc, info);
1163         }
1164
1165         ops->p = &fb_display[fg_console];
1166 }
1167
1168 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1169 {
1170         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1171                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1172         p->fontdata = NULL;
1173         p->userfont = 0;
1174 }
1175
1176 static void set_vc_hi_font(struct vc_data *vc, bool set);
1177
1178 static void fbcon_deinit(struct vc_data *vc)
1179 {
1180         struct fbcon_display *p = &fb_display[vc->vc_num];
1181         struct fb_info *info;
1182         struct fbcon_ops *ops;
1183         int idx;
1184         bool free_font = true;
1185
1186         idx = con2fb_map[vc->vc_num];
1187
1188         if (idx == -1)
1189                 goto finished;
1190
1191         info = registered_fb[idx];
1192
1193         if (!info)
1194                 goto finished;
1195
1196         if (info->flags & FBINFO_MISC_FIRMWARE)
1197                 free_font = false;
1198         ops = info->fbcon_par;
1199
1200         if (!ops)
1201                 goto finished;
1202
1203         if (con_is_visible(vc))
1204                 fbcon_del_cursor_timer(info);
1205
1206         ops->flags &= ~FBCON_FLAGS_INIT;
1207 finished:
1208
1209         fbcon_free_font(p, free_font);
1210         if (free_font)
1211                 vc->vc_font.data = NULL;
1212
1213         if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1214                 set_vc_hi_font(vc, false);
1215
1216         if (!con_is_bound(&fb_con))
1217                 fbcon_exit();
1218
1219         if (vc->vc_num == logo_shown)
1220                 logo_shown = FBCON_LOGO_CANSHOW;
1221
1222         return;
1223 }
1224
1225 /* ====================================================================== */
1226
1227 /*  fbcon_XXX routines - interface used by the world
1228  *
1229  *  This system is now divided into two levels because of complications
1230  *  caused by hardware scrolling. Top level functions:
1231  *
1232  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1233  *
1234  *  handles y values in range [0, scr_height-1] that correspond to real
1235  *  screen positions. y_wrap shift means that first line of bitmap may be
1236  *  anywhere on this display. These functions convert lineoffsets to
1237  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1238  *
1239  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1240  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1241  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1242  *
1243  *  WARNING:
1244  *
1245  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1246  *  Implies should only really hardware scroll in rows. Only reason for
1247  *  restriction is simplicity & efficiency at the moment.
1248  */
1249
1250 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1251                         int width)
1252 {
1253         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1254         struct fbcon_ops *ops = info->fbcon_par;
1255
1256         struct fbcon_display *p = &fb_display[vc->vc_num];
1257         u_int y_break;
1258
1259         if (fbcon_is_inactive(vc, info))
1260                 return;
1261
1262         if (!height || !width)
1263                 return;
1264
1265         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1266                 vc->vc_top = 0;
1267                 /*
1268                  * If the font dimensions are not an integral of the display
1269                  * dimensions then the ops->clear below won't end up clearing
1270                  * the margins.  Call clear_margins here in case the logo
1271                  * bitmap stretched into the margin area.
1272                  */
1273                 fbcon_clear_margins(vc, 0);
1274         }
1275
1276         /* Split blits that cross physical y_wrap boundary */
1277
1278         y_break = p->vrows - p->yscroll;
1279         if (sy < y_break && sy + height - 1 >= y_break) {
1280                 u_int b = y_break - sy;
1281                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1282                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1283                                  width);
1284         } else
1285                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1286 }
1287
1288 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1289                         int count, int ypos, int xpos)
1290 {
1291         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1292         struct fbcon_display *p = &fb_display[vc->vc_num];
1293         struct fbcon_ops *ops = info->fbcon_par;
1294
1295         if (!fbcon_is_inactive(vc, info))
1296                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1297                            get_color(vc, info, scr_readw(s), 1),
1298                            get_color(vc, info, scr_readw(s), 0));
1299 }
1300
1301 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1302 {
1303         unsigned short chr;
1304
1305         scr_writew(c, &chr);
1306         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1307 }
1308
1309 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1310 {
1311         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1312         struct fbcon_ops *ops = info->fbcon_par;
1313
1314         if (!fbcon_is_inactive(vc, info))
1315                 ops->clear_margins(vc, info, margin_color, bottom_only);
1316 }
1317
1318 static void fbcon_cursor(struct vc_data *vc, int mode)
1319 {
1320         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1321         struct fbcon_ops *ops = info->fbcon_par;
1322         int c = scr_readw((u16 *) vc->vc_pos);
1323
1324         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1325
1326         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1327                 return;
1328
1329         if (vc->vc_cursor_type & CUR_SW)
1330                 fbcon_del_cursor_timer(info);
1331         else
1332                 fbcon_add_cursor_timer(info);
1333
1334         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1335
1336         ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1337                     get_color(vc, info, c, 0));
1338 }
1339
1340 static int scrollback_phys_max = 0;
1341 static int scrollback_max = 0;
1342 static int scrollback_current = 0;
1343
1344 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1345                            int unit)
1346 {
1347         struct fbcon_display *p, *t;
1348         struct vc_data **default_mode, *vc;
1349         struct vc_data *svc;
1350         struct fbcon_ops *ops = info->fbcon_par;
1351         int rows, cols;
1352
1353         p = &fb_display[unit];
1354
1355         if (var_to_display(p, var, info))
1356                 return;
1357
1358         vc = vc_cons[unit].d;
1359
1360         if (!vc)
1361                 return;
1362
1363         default_mode = vc->vc_display_fg;
1364         svc = *default_mode;
1365         t = &fb_display[svc->vc_num];
1366
1367         if (!vc->vc_font.data) {
1368                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1369                 vc->vc_font.width = (*default_mode)->vc_font.width;
1370                 vc->vc_font.height = (*default_mode)->vc_font.height;
1371                 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1372                 p->userfont = t->userfont;
1373                 if (p->userfont)
1374                         REFCOUNT(p->fontdata)++;
1375         }
1376
1377         var->activate = FB_ACTIVATE_NOW;
1378         info->var.activate = var->activate;
1379         var->yoffset = info->var.yoffset;
1380         var->xoffset = info->var.xoffset;
1381         fb_set_var(info, var);
1382         ops->var = info->var;
1383         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1384         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1385         if (vc->vc_font.charcount == 256) {
1386                 vc->vc_hi_font_mask = 0;
1387         } else {
1388                 vc->vc_hi_font_mask = 0x100;
1389                 if (vc->vc_can_do_color)
1390                         vc->vc_complement_mask <<= 1;
1391         }
1392
1393         if (!*svc->vc_uni_pagedir_loc)
1394                 con_set_default_unimap(svc);
1395         if (!*vc->vc_uni_pagedir_loc)
1396                 con_copy_unimap(vc, svc);
1397
1398         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1399         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1400         cols /= vc->vc_font.width;
1401         rows /= vc->vc_font.height;
1402         vc_resize(vc, cols, rows);
1403
1404         if (con_is_visible(vc)) {
1405                 update_screen(vc);
1406         }
1407 }
1408
1409 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1410 {
1411         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1412         struct fbcon_ops *ops = info->fbcon_par;
1413         struct fbcon_display *p = &fb_display[vc->vc_num];
1414
1415         p->yscroll += count;
1416         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1417                 p->yscroll -= p->vrows;
1418         ops->var.xoffset = 0;
1419         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1420         ops->var.vmode |= FB_VMODE_YWRAP;
1421         ops->update_start(info);
1422         scrollback_max += count;
1423         if (scrollback_max > scrollback_phys_max)
1424                 scrollback_max = scrollback_phys_max;
1425         scrollback_current = 0;
1426 }
1427
1428 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1429 {
1430         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1431         struct fbcon_ops *ops = info->fbcon_par;
1432         struct fbcon_display *p = &fb_display[vc->vc_num];
1433
1434         p->yscroll -= count;
1435         if (p->yscroll < 0)     /* Deal with wrap */
1436                 p->yscroll += p->vrows;
1437         ops->var.xoffset = 0;
1438         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1439         ops->var.vmode |= FB_VMODE_YWRAP;
1440         ops->update_start(info);
1441         scrollback_max -= count;
1442         if (scrollback_max < 0)
1443                 scrollback_max = 0;
1444         scrollback_current = 0;
1445 }
1446
1447 static __inline__ void ypan_up(struct vc_data *vc, int count)
1448 {
1449         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1450         struct fbcon_display *p = &fb_display[vc->vc_num];
1451         struct fbcon_ops *ops = info->fbcon_par;
1452
1453         p->yscroll += count;
1454         if (p->yscroll > p->vrows - vc->vc_rows) {
1455                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1456                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1457                 p->yscroll -= p->vrows - vc->vc_rows;
1458         }
1459
1460         ops->var.xoffset = 0;
1461         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1462         ops->var.vmode &= ~FB_VMODE_YWRAP;
1463         ops->update_start(info);
1464         fbcon_clear_margins(vc, 1);
1465         scrollback_max += count;
1466         if (scrollback_max > scrollback_phys_max)
1467                 scrollback_max = scrollback_phys_max;
1468         scrollback_current = 0;
1469 }
1470
1471 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1472 {
1473         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1474         struct fbcon_ops *ops = info->fbcon_par;
1475         struct fbcon_display *p = &fb_display[vc->vc_num];
1476
1477         p->yscroll += count;
1478
1479         if (p->yscroll > p->vrows - vc->vc_rows) {
1480                 p->yscroll -= p->vrows - vc->vc_rows;
1481                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1482         }
1483
1484         ops->var.xoffset = 0;
1485         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1486         ops->var.vmode &= ~FB_VMODE_YWRAP;
1487         ops->update_start(info);
1488         fbcon_clear_margins(vc, 1);
1489         scrollback_max += count;
1490         if (scrollback_max > scrollback_phys_max)
1491                 scrollback_max = scrollback_phys_max;
1492         scrollback_current = 0;
1493 }
1494
1495 static __inline__ void ypan_down(struct vc_data *vc, int count)
1496 {
1497         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1498         struct fbcon_display *p = &fb_display[vc->vc_num];
1499         struct fbcon_ops *ops = info->fbcon_par;
1500
1501         p->yscroll -= count;
1502         if (p->yscroll < 0) {
1503                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1504                             0, vc->vc_rows, vc->vc_cols);
1505                 p->yscroll += p->vrows - vc->vc_rows;
1506         }
1507
1508         ops->var.xoffset = 0;
1509         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1510         ops->var.vmode &= ~FB_VMODE_YWRAP;
1511         ops->update_start(info);
1512         fbcon_clear_margins(vc, 1);
1513         scrollback_max -= count;
1514         if (scrollback_max < 0)
1515                 scrollback_max = 0;
1516         scrollback_current = 0;
1517 }
1518
1519 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1520 {
1521         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1522         struct fbcon_ops *ops = info->fbcon_par;
1523         struct fbcon_display *p = &fb_display[vc->vc_num];
1524
1525         p->yscroll -= count;
1526
1527         if (p->yscroll < 0) {
1528                 p->yscroll += p->vrows - vc->vc_rows;
1529                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1530         }
1531
1532         ops->var.xoffset = 0;
1533         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1534         ops->var.vmode &= ~FB_VMODE_YWRAP;
1535         ops->update_start(info);
1536         fbcon_clear_margins(vc, 1);
1537         scrollback_max -= count;
1538         if (scrollback_max < 0)
1539                 scrollback_max = 0;
1540         scrollback_current = 0;
1541 }
1542
1543 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1544                               int line, int count, int dy)
1545 {
1546         unsigned short *s = (unsigned short *)
1547                 (vc->vc_origin + vc->vc_size_row * line);
1548
1549         while (count--) {
1550                 unsigned short *start = s;
1551                 unsigned short *le = advance_row(s, 1);
1552                 unsigned short c;
1553                 int x = 0;
1554                 unsigned short attr = 1;
1555
1556                 do {
1557                         c = scr_readw(s);
1558                         if (attr != (c & 0xff00)) {
1559                                 attr = c & 0xff00;
1560                                 if (s > start) {
1561                                         fbcon_putcs(vc, start, s - start,
1562                                                     dy, x);
1563                                         x += s - start;
1564                                         start = s;
1565                                 }
1566                         }
1567                         console_conditional_schedule();
1568                         s++;
1569                 } while (s < le);
1570                 if (s > start)
1571                         fbcon_putcs(vc, start, s - start, dy, x);
1572                 console_conditional_schedule();
1573                 dy++;
1574         }
1575 }
1576
1577 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1578                         struct fbcon_display *p, int line, int count, int ycount)
1579 {
1580         int offset = ycount * vc->vc_cols;
1581         unsigned short *d = (unsigned short *)
1582             (vc->vc_origin + vc->vc_size_row * line);
1583         unsigned short *s = d + offset;
1584         struct fbcon_ops *ops = info->fbcon_par;
1585
1586         while (count--) {
1587                 unsigned short *start = s;
1588                 unsigned short *le = advance_row(s, 1);
1589                 unsigned short c;
1590                 int x = 0;
1591
1592                 do {
1593                         c = scr_readw(s);
1594
1595                         if (c == scr_readw(d)) {
1596                                 if (s > start) {
1597                                         ops->bmove(vc, info, line + ycount, x,
1598                                                    line, x, 1, s-start);
1599                                         x += s - start + 1;
1600                                         start = s + 1;
1601                                 } else {
1602                                         x++;
1603                                         start++;
1604                                 }
1605                         }
1606
1607                         scr_writew(c, d);
1608                         console_conditional_schedule();
1609                         s++;
1610                         d++;
1611                 } while (s < le);
1612                 if (s > start)
1613                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1614                                    s-start);
1615                 console_conditional_schedule();
1616                 if (ycount > 0)
1617                         line++;
1618                 else {
1619                         line--;
1620                         /* NOTE: We subtract two lines from these pointers */
1621                         s -= vc->vc_size_row;
1622                         d -= vc->vc_size_row;
1623                 }
1624         }
1625 }
1626
1627 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1628                          int line, int count, int offset)
1629 {
1630         unsigned short *d = (unsigned short *)
1631             (vc->vc_origin + vc->vc_size_row * line);
1632         unsigned short *s = d + offset;
1633
1634         while (count--) {
1635                 unsigned short *start = s;
1636                 unsigned short *le = advance_row(s, 1);
1637                 unsigned short c;
1638                 int x = 0;
1639                 unsigned short attr = 1;
1640
1641                 do {
1642                         c = scr_readw(s);
1643                         if (attr != (c & 0xff00)) {
1644                                 attr = c & 0xff00;
1645                                 if (s > start) {
1646                                         fbcon_putcs(vc, start, s - start,
1647                                                     line, x);
1648                                         x += s - start;
1649                                         start = s;
1650                                 }
1651                         }
1652                         if (c == scr_readw(d)) {
1653                                 if (s > start) {
1654                                         fbcon_putcs(vc, start, s - start,
1655                                                      line, x);
1656                                         x += s - start + 1;
1657                                         start = s + 1;
1658                                 } else {
1659                                         x++;
1660                                         start++;
1661                                 }
1662                         }
1663                         scr_writew(c, d);
1664                         console_conditional_schedule();
1665                         s++;
1666                         d++;
1667                 } while (s < le);
1668                 if (s > start)
1669                         fbcon_putcs(vc, start, s - start, line, x);
1670                 console_conditional_schedule();
1671                 if (offset > 0)
1672                         line++;
1673                 else {
1674                         line--;
1675                         /* NOTE: We subtract two lines from these pointers */
1676                         s -= vc->vc_size_row;
1677                         d -= vc->vc_size_row;
1678                 }
1679         }
1680 }
1681
1682 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1683                 enum con_scroll dir, unsigned int count)
1684 {
1685         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1686         struct fbcon_display *p = &fb_display[vc->vc_num];
1687         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1688
1689         if (fbcon_is_inactive(vc, info))
1690                 return true;
1691
1692         fbcon_cursor(vc, CM_ERASE);
1693
1694         /*
1695          * ++Geert: Only use ywrap/ypan if the console is in text mode
1696          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1697          *           whole screen (prevents flicker).
1698          */
1699
1700         switch (dir) {
1701         case SM_UP:
1702                 if (count > vc->vc_rows)        /* Maximum realistic size */
1703                         count = vc->vc_rows;
1704                 if (logo_shown >= 0)
1705                         goto redraw_up;
1706                 switch (p->scrollmode) {
1707                 case SCROLL_MOVE:
1708                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1709                                      count);
1710                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1711                         scr_memsetw((unsigned short *) (vc->vc_origin +
1712                                                         vc->vc_size_row *
1713                                                         (b - count)),
1714                                     vc->vc_video_erase_char,
1715                                     vc->vc_size_row * count);
1716                         return true;
1717
1718                 case SCROLL_WRAP_MOVE:
1719                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1720                                 if (t > 0)
1721                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1722                                                     vc->vc_cols);
1723                                 ywrap_up(vc, count);
1724                                 if (vc->vc_rows - b > 0)
1725                                         fbcon_bmove(vc, b - count, 0, b, 0,
1726                                                     vc->vc_rows - b,
1727                                                     vc->vc_cols);
1728                         } else if (info->flags & FBINFO_READS_FAST)
1729                                 fbcon_bmove(vc, t + count, 0, t, 0,
1730                                             b - t - count, vc->vc_cols);
1731                         else
1732                                 goto redraw_up;
1733                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1734                         break;
1735
1736                 case SCROLL_PAN_REDRAW:
1737                         if ((p->yscroll + count <=
1738                              2 * (p->vrows - vc->vc_rows))
1739                             && ((!scroll_partial && (b - t == vc->vc_rows))
1740                                 || (scroll_partial
1741                                     && (b - t - count >
1742                                         3 * vc->vc_rows >> 2)))) {
1743                                 if (t > 0)
1744                                         fbcon_redraw_move(vc, p, 0, t, count);
1745                                 ypan_up_redraw(vc, t, count);
1746                                 if (vc->vc_rows - b > 0)
1747                                         fbcon_redraw_move(vc, p, b,
1748                                                           vc->vc_rows - b, b);
1749                         } else
1750                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1751                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1752                         break;
1753
1754                 case SCROLL_PAN_MOVE:
1755                         if ((p->yscroll + count <=
1756                              2 * (p->vrows - vc->vc_rows))
1757                             && ((!scroll_partial && (b - t == vc->vc_rows))
1758                                 || (scroll_partial
1759                                     && (b - t - count >
1760                                         3 * vc->vc_rows >> 2)))) {
1761                                 if (t > 0)
1762                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1763                                                     vc->vc_cols);
1764                                 ypan_up(vc, count);
1765                                 if (vc->vc_rows - b > 0)
1766                                         fbcon_bmove(vc, b - count, 0, b, 0,
1767                                                     vc->vc_rows - b,
1768                                                     vc->vc_cols);
1769                         } else if (info->flags & FBINFO_READS_FAST)
1770                                 fbcon_bmove(vc, t + count, 0, t, 0,
1771                                             b - t - count, vc->vc_cols);
1772                         else
1773                                 goto redraw_up;
1774                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1775                         break;
1776
1777                 case SCROLL_REDRAW:
1778                       redraw_up:
1779                         fbcon_redraw(vc, p, t, b - t - count,
1780                                      count * vc->vc_cols);
1781                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1782                         scr_memsetw((unsigned short *) (vc->vc_origin +
1783                                                         vc->vc_size_row *
1784                                                         (b - count)),
1785                                     vc->vc_video_erase_char,
1786                                     vc->vc_size_row * count);
1787                         return true;
1788                 }
1789                 break;
1790
1791         case SM_DOWN:
1792                 if (count > vc->vc_rows)        /* Maximum realistic size */
1793                         count = vc->vc_rows;
1794                 if (logo_shown >= 0)
1795                         goto redraw_down;
1796                 switch (p->scrollmode) {
1797                 case SCROLL_MOVE:
1798                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1799                                      -count);
1800                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1801                         scr_memsetw((unsigned short *) (vc->vc_origin +
1802                                                         vc->vc_size_row *
1803                                                         t),
1804                                     vc->vc_video_erase_char,
1805                                     vc->vc_size_row * count);
1806                         return true;
1807
1808                 case SCROLL_WRAP_MOVE:
1809                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1810                                 if (vc->vc_rows - b > 0)
1811                                         fbcon_bmove(vc, b, 0, b - count, 0,
1812                                                     vc->vc_rows - b,
1813                                                     vc->vc_cols);
1814                                 ywrap_down(vc, count);
1815                                 if (t > 0)
1816                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1817                                                     vc->vc_cols);
1818                         } else if (info->flags & FBINFO_READS_FAST)
1819                                 fbcon_bmove(vc, t, 0, t + count, 0,
1820                                             b - t - count, vc->vc_cols);
1821                         else
1822                                 goto redraw_down;
1823                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1824                         break;
1825
1826                 case SCROLL_PAN_MOVE:
1827                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1828                             && ((!scroll_partial && (b - t == vc->vc_rows))
1829                                 || (scroll_partial
1830                                     && (b - t - count >
1831                                         3 * vc->vc_rows >> 2)))) {
1832                                 if (vc->vc_rows - b > 0)
1833                                         fbcon_bmove(vc, b, 0, b - count, 0,
1834                                                     vc->vc_rows - b,
1835                                                     vc->vc_cols);
1836                                 ypan_down(vc, count);
1837                                 if (t > 0)
1838                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1839                                                     vc->vc_cols);
1840                         } else if (info->flags & FBINFO_READS_FAST)
1841                                 fbcon_bmove(vc, t, 0, t + count, 0,
1842                                             b - t - count, vc->vc_cols);
1843                         else
1844                                 goto redraw_down;
1845                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1846                         break;
1847
1848                 case SCROLL_PAN_REDRAW:
1849                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1850                             && ((!scroll_partial && (b - t == vc->vc_rows))
1851                                 || (scroll_partial
1852                                     && (b - t - count >
1853                                         3 * vc->vc_rows >> 2)))) {
1854                                 if (vc->vc_rows - b > 0)
1855                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1856                                                           b - count);
1857                                 ypan_down_redraw(vc, t, count);
1858                                 if (t > 0)
1859                                         fbcon_redraw_move(vc, p, count, t, 0);
1860                         } else
1861                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1862                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1863                         break;
1864
1865                 case SCROLL_REDRAW:
1866                       redraw_down:
1867                         fbcon_redraw(vc, p, b - 1, b - t - count,
1868                                      -count * vc->vc_cols);
1869                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1870                         scr_memsetw((unsigned short *) (vc->vc_origin +
1871                                                         vc->vc_size_row *
1872                                                         t),
1873                                     vc->vc_video_erase_char,
1874                                     vc->vc_size_row * count);
1875                         return true;
1876                 }
1877         }
1878         return false;
1879 }
1880
1881
1882 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1883                         int height, int width)
1884 {
1885         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1886         struct fbcon_display *p = &fb_display[vc->vc_num];
1887
1888         if (fbcon_is_inactive(vc, info))
1889                 return;
1890
1891         if (!width || !height)
1892                 return;
1893
1894         /*  Split blits that cross physical y_wrap case.
1895          *  Pathological case involves 4 blits, better to use recursive
1896          *  code rather than unrolled case
1897          *
1898          *  Recursive invocations don't need to erase the cursor over and
1899          *  over again, so we use fbcon_bmove_rec()
1900          */
1901         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1902                         p->vrows - p->yscroll);
1903 }
1904
1905 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1906                             int dy, int dx, int height, int width, u_int y_break)
1907 {
1908         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1909         struct fbcon_ops *ops = info->fbcon_par;
1910         u_int b;
1911
1912         if (sy < y_break && sy + height > y_break) {
1913                 b = y_break - sy;
1914                 if (dy < sy) {  /* Avoid trashing self */
1915                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1916                                         y_break);
1917                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1918                                         height - b, width, y_break);
1919                 } else {
1920                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1921                                         height - b, width, y_break);
1922                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1923                                         y_break);
1924                 }
1925                 return;
1926         }
1927
1928         if (dy < y_break && dy + height > y_break) {
1929                 b = y_break - dy;
1930                 if (dy < sy) {  /* Avoid trashing self */
1931                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1932                                         y_break);
1933                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1934                                         height - b, width, y_break);
1935                 } else {
1936                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1937                                         height - b, width, y_break);
1938                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1939                                         y_break);
1940                 }
1941                 return;
1942         }
1943         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1944                    height, width);
1945 }
1946
1947 static void updatescrollmode(struct fbcon_display *p,
1948                                         struct fb_info *info,
1949                                         struct vc_data *vc)
1950 {
1951         struct fbcon_ops *ops = info->fbcon_par;
1952         int fh = vc->vc_font.height;
1953         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1954         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1955                                    info->var.xres_virtual);
1956
1957         p->vrows = vyres/fh;
1958         if (yres > (fh * (vc->vc_rows + 1)))
1959                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1960         if ((yres % fh) && (vyres % fh < yres % fh))
1961                 p->vrows--;
1962 }
1963
1964 #define PITCH(w) (((w) + 7) >> 3)
1965 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
1966
1967 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1968                         unsigned int height, unsigned int user)
1969 {
1970         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1971         struct fbcon_ops *ops = info->fbcon_par;
1972         struct fbcon_display *p = &fb_display[vc->vc_num];
1973         struct fb_var_screeninfo var = info->var;
1974         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
1975
1976         if (p->userfont && FNTSIZE(vc->vc_font.data)) {
1977                 int size;
1978                 int pitch = PITCH(vc->vc_font.width);
1979
1980                 /*
1981                  * If user font, ensure that a possible change to user font
1982                  * height or width will not allow a font data out-of-bounds access.
1983                  * NOTE: must use original charcount in calculation as font
1984                  * charcount can change and cannot be used to determine the
1985                  * font data allocated size.
1986                  */
1987                 if (pitch <= 0)
1988                         return -EINVAL;
1989                 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
1990                 if (size > FNTSIZE(vc->vc_font.data))
1991                         return -EINVAL;
1992         }
1993
1994         virt_w = FBCON_SWAP(ops->rotate, width, height);
1995         virt_h = FBCON_SWAP(ops->rotate, height, width);
1996         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
1997                                  vc->vc_font.height);
1998         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
1999                                  vc->vc_font.width);
2000         var.xres = virt_w * virt_fw;
2001         var.yres = virt_h * virt_fh;
2002         x_diff = info->var.xres - var.xres;
2003         y_diff = info->var.yres - var.yres;
2004         if (x_diff < 0 || x_diff > virt_fw ||
2005             y_diff < 0 || y_diff > virt_fh) {
2006                 const struct fb_videomode *mode;
2007
2008                 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2009                 mode = fb_find_best_mode(&var, &info->modelist);
2010                 if (mode == NULL)
2011                         return -EINVAL;
2012                 display_to_var(&var, p);
2013                 fb_videomode_to_var(&var, mode);
2014
2015                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2016                         return -EINVAL;
2017
2018                 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2019                 if (con_is_visible(vc)) {
2020                         var.activate = FB_ACTIVATE_NOW |
2021                                 FB_ACTIVATE_FORCE;
2022                         fb_set_var(info, &var);
2023                 }
2024                 var_to_display(p, &info->var, info);
2025                 ops->var = info->var;
2026         }
2027         updatescrollmode(p, info, vc);
2028         return 0;
2029 }
2030
2031 static int fbcon_switch(struct vc_data *vc)
2032 {
2033         struct fb_info *info, *old_info = NULL;
2034         struct fbcon_ops *ops;
2035         struct fbcon_display *p = &fb_display[vc->vc_num];
2036         struct fb_var_screeninfo var;
2037         int i, ret, prev_console;
2038
2039         info = registered_fb[con2fb_map[vc->vc_num]];
2040         ops = info->fbcon_par;
2041
2042         if (logo_shown >= 0) {
2043                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2044
2045                 if (conp2->vc_top == logo_lines
2046                     && conp2->vc_bottom == conp2->vc_rows)
2047                         conp2->vc_top = 0;
2048                 logo_shown = FBCON_LOGO_CANSHOW;
2049         }
2050
2051         prev_console = ops->currcon;
2052         if (prev_console != -1)
2053                 old_info = registered_fb[con2fb_map[prev_console]];
2054         /*
2055          * FIXME: If we have multiple fbdev's loaded, we need to
2056          * update all info->currcon.  Perhaps, we can place this
2057          * in a centralized structure, but this might break some
2058          * drivers.
2059          *
2060          * info->currcon = vc->vc_num;
2061          */
2062         for_each_registered_fb(i) {
2063                 if (registered_fb[i]->fbcon_par) {
2064                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2065
2066                         o->currcon = vc->vc_num;
2067                 }
2068         }
2069         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2070         display_to_var(&var, p);
2071         var.activate = FB_ACTIVATE_NOW;
2072
2073         /*
2074          * make sure we don't unnecessarily trip the memcmp()
2075          * in fb_set_var()
2076          */
2077         info->var.activate = var.activate;
2078         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2079         fb_set_var(info, &var);
2080         ops->var = info->var;
2081
2082         if (old_info != NULL && (old_info != info ||
2083                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2084                 if (info->fbops->fb_set_par) {
2085                         ret = info->fbops->fb_set_par(info);
2086
2087                         if (ret)
2088                                 printk(KERN_ERR "fbcon_switch: detected "
2089                                         "unhandled fb_set_par error, "
2090                                         "error code %d\n", ret);
2091                 }
2092
2093                 if (old_info != info)
2094                         fbcon_del_cursor_timer(old_info);
2095         }
2096
2097         if (fbcon_is_inactive(vc, info) ||
2098             ops->blank_state != FB_BLANK_UNBLANK)
2099                 fbcon_del_cursor_timer(info);
2100         else
2101                 fbcon_add_cursor_timer(info);
2102
2103         set_blitting_type(vc, info);
2104         ops->cursor_reset = 1;
2105
2106         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2107                 ops->rotate = FB_ROTATE_UR;
2108                 set_blitting_type(vc, info);
2109         }
2110
2111         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2112         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2113
2114         if (vc->vc_font.charcount > 256)
2115                 vc->vc_complement_mask <<= 1;
2116
2117         updatescrollmode(p, info, vc);
2118
2119         switch (p->scrollmode) {
2120         case SCROLL_WRAP_MOVE:
2121                 scrollback_phys_max = p->vrows - vc->vc_rows;
2122                 break;
2123         case SCROLL_PAN_MOVE:
2124         case SCROLL_PAN_REDRAW:
2125                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2126                 if (scrollback_phys_max < 0)
2127                         scrollback_phys_max = 0;
2128                 break;
2129         default:
2130                 scrollback_phys_max = 0;
2131                 break;
2132         }
2133
2134         scrollback_max = 0;
2135         scrollback_current = 0;
2136
2137         if (!fbcon_is_inactive(vc, info)) {
2138             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2139             ops->update_start(info);
2140         }
2141
2142         fbcon_set_palette(vc, color_table);
2143         fbcon_clear_margins(vc, 0);
2144
2145         if (logo_shown == FBCON_LOGO_DRAW) {
2146
2147                 logo_shown = fg_console;
2148                 /* This is protected above by initmem_freed */
2149                 fb_show_logo(info, ops->rotate);
2150                 update_region(vc,
2151                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2152                               vc->vc_size_row * (vc->vc_bottom -
2153                                                  vc->vc_top) / 2);
2154                 return 0;
2155         }
2156         return 1;
2157 }
2158
2159 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2160                                 int blank)
2161 {
2162         if (blank) {
2163                 unsigned short charmask = vc->vc_hi_font_mask ?
2164                         0x1ff : 0xff;
2165                 unsigned short oldc;
2166
2167                 oldc = vc->vc_video_erase_char;
2168                 vc->vc_video_erase_char &= charmask;
2169                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2170                 vc->vc_video_erase_char = oldc;
2171         }
2172 }
2173
2174 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2175 {
2176         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2177         struct fbcon_ops *ops = info->fbcon_par;
2178
2179         if (mode_switch) {
2180                 struct fb_var_screeninfo var = info->var;
2181
2182                 ops->graphics = 1;
2183
2184                 if (!blank) {
2185                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2186                                 FB_ACTIVATE_KD_TEXT;
2187                         fb_set_var(info, &var);
2188                         ops->graphics = 0;
2189                         ops->var = info->var;
2190                 }
2191         }
2192
2193         if (!fbcon_is_inactive(vc, info)) {
2194                 if (ops->blank_state != blank) {
2195                         ops->blank_state = blank;
2196                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2197                         ops->cursor_flash = (!blank);
2198
2199                         if (fb_blank(info, blank))
2200                                 fbcon_generic_blank(vc, info, blank);
2201                 }
2202
2203                 if (!blank)
2204                         update_screen(vc);
2205         }
2206
2207         if (mode_switch || fbcon_is_inactive(vc, info) ||
2208             ops->blank_state != FB_BLANK_UNBLANK)
2209                 fbcon_del_cursor_timer(info);
2210         else
2211                 fbcon_add_cursor_timer(info);
2212
2213         return 0;
2214 }
2215
2216 static int fbcon_debug_enter(struct vc_data *vc)
2217 {
2218         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2219         struct fbcon_ops *ops = info->fbcon_par;
2220
2221         ops->save_graphics = ops->graphics;
2222         ops->graphics = 0;
2223         if (info->fbops->fb_debug_enter)
2224                 info->fbops->fb_debug_enter(info);
2225         fbcon_set_palette(vc, color_table);
2226         return 0;
2227 }
2228
2229 static int fbcon_debug_leave(struct vc_data *vc)
2230 {
2231         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2232         struct fbcon_ops *ops = info->fbcon_par;
2233
2234         ops->graphics = ops->save_graphics;
2235         if (info->fbops->fb_debug_leave)
2236                 info->fbops->fb_debug_leave(info);
2237         return 0;
2238 }
2239
2240 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2241 {
2242         u8 *fontdata = vc->vc_font.data;
2243         u8 *data = font->data;
2244         int i, j;
2245
2246         font->width = vc->vc_font.width;
2247         font->height = vc->vc_font.height;
2248         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2249         if (!font->data)
2250                 return 0;
2251
2252         if (font->width <= 8) {
2253                 j = vc->vc_font.height;
2254                 if (font->charcount * j > FNTSIZE(fontdata))
2255                         return -EINVAL;
2256
2257                 for (i = 0; i < font->charcount; i++) {
2258                         memcpy(data, fontdata, j);
2259                         memset(data + j, 0, 32 - j);
2260                         data += 32;
2261                         fontdata += j;
2262                 }
2263         } else if (font->width <= 16) {
2264                 j = vc->vc_font.height * 2;
2265                 if (font->charcount * j > FNTSIZE(fontdata))
2266                         return -EINVAL;
2267
2268                 for (i = 0; i < font->charcount; i++) {
2269                         memcpy(data, fontdata, j);
2270                         memset(data + j, 0, 64 - j);
2271                         data += 64;
2272                         fontdata += j;
2273                 }
2274         } else if (font->width <= 24) {
2275                 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2276                         return -EINVAL;
2277
2278                 for (i = 0; i < font->charcount; i++) {
2279                         for (j = 0; j < vc->vc_font.height; j++) {
2280                                 *data++ = fontdata[0];
2281                                 *data++ = fontdata[1];
2282                                 *data++ = fontdata[2];
2283                                 fontdata += sizeof(u32);
2284                         }
2285                         memset(data, 0, 3 * (32 - j));
2286                         data += 3 * (32 - j);
2287                 }
2288         } else {
2289                 j = vc->vc_font.height * 4;
2290                 if (font->charcount * j > FNTSIZE(fontdata))
2291                         return -EINVAL;
2292
2293                 for (i = 0; i < font->charcount; i++) {
2294                         memcpy(data, fontdata, j);
2295                         memset(data + j, 0, 128 - j);
2296                         data += 128;
2297                         fontdata += j;
2298                 }
2299         }
2300         return 0;
2301 }
2302
2303 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2304 static void set_vc_hi_font(struct vc_data *vc, bool set)
2305 {
2306         if (!set) {
2307                 vc->vc_hi_font_mask = 0;
2308                 if (vc->vc_can_do_color) {
2309                         vc->vc_complement_mask >>= 1;
2310                         vc->vc_s_complement_mask >>= 1;
2311                 }
2312
2313                 /* ++Edmund: reorder the attribute bits */
2314                 if (vc->vc_can_do_color) {
2315                         unsigned short *cp =
2316                             (unsigned short *) vc->vc_origin;
2317                         int count = vc->vc_screenbuf_size / 2;
2318                         unsigned short c;
2319                         for (; count > 0; count--, cp++) {
2320                                 c = scr_readw(cp);
2321                                 scr_writew(((c & 0xfe00) >> 1) |
2322                                            (c & 0xff), cp);
2323                         }
2324                         c = vc->vc_video_erase_char;
2325                         vc->vc_video_erase_char =
2326                             ((c & 0xfe00) >> 1) | (c & 0xff);
2327                         vc->vc_attr >>= 1;
2328                 }
2329         } else {
2330                 vc->vc_hi_font_mask = 0x100;
2331                 if (vc->vc_can_do_color) {
2332                         vc->vc_complement_mask <<= 1;
2333                         vc->vc_s_complement_mask <<= 1;
2334                 }
2335
2336                 /* ++Edmund: reorder the attribute bits */
2337                 {
2338                         unsigned short *cp =
2339                             (unsigned short *) vc->vc_origin;
2340                         int count = vc->vc_screenbuf_size / 2;
2341                         unsigned short c;
2342                         for (; count > 0; count--, cp++) {
2343                                 unsigned short newc;
2344                                 c = scr_readw(cp);
2345                                 if (vc->vc_can_do_color)
2346                                         newc =
2347                                             ((c & 0xff00) << 1) | (c &
2348                                                                    0xff);
2349                                 else
2350                                         newc = c & ~0x100;
2351                                 scr_writew(newc, cp);
2352                         }
2353                         c = vc->vc_video_erase_char;
2354                         if (vc->vc_can_do_color) {
2355                                 vc->vc_video_erase_char =
2356                                     ((c & 0xff00) << 1) | (c & 0xff);
2357                                 vc->vc_attr <<= 1;
2358                         } else
2359                                 vc->vc_video_erase_char = c & ~0x100;
2360                 }
2361         }
2362 }
2363
2364 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2365                              const u8 * data, int userfont)
2366 {
2367         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2368         struct fbcon_ops *ops = info->fbcon_par;
2369         struct fbcon_display *p = &fb_display[vc->vc_num];
2370         int resize;
2371         char *old_data = NULL;
2372
2373         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2374         if (p->userfont)
2375                 old_data = vc->vc_font.data;
2376         vc->vc_font.data = (void *)(p->fontdata = data);
2377         if ((p->userfont = userfont))
2378                 REFCOUNT(data)++;
2379         vc->vc_font.width = w;
2380         vc->vc_font.height = h;
2381         vc->vc_font.charcount = charcount;
2382         if (vc->vc_hi_font_mask && charcount == 256)
2383                 set_vc_hi_font(vc, false);
2384         else if (!vc->vc_hi_font_mask && charcount == 512)
2385                 set_vc_hi_font(vc, true);
2386
2387         if (resize) {
2388                 int cols, rows;
2389
2390                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2391                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2392                 cols /= w;
2393                 rows /= h;
2394                 vc_resize(vc, cols, rows);
2395         } else if (con_is_visible(vc)
2396                    && vc->vc_mode == KD_TEXT) {
2397                 fbcon_clear_margins(vc, 0);
2398                 update_screen(vc);
2399         }
2400
2401         if (old_data && (--REFCOUNT(old_data) == 0))
2402                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2403         return 0;
2404 }
2405
2406 /*
2407  *  User asked to set font; we are guaranteed that
2408  *      a) width and height are in range 1..32
2409  *      b) charcount does not exceed 512
2410  *  but lets not assume that, since someone might someday want to use larger
2411  *  fonts. And charcount of 512 is small for unicode support.
2412  *
2413  *  However, user space gives the font in 32 rows , regardless of
2414  *  actual font height. So a new API is needed if support for larger fonts
2415  *  is ever implemented.
2416  */
2417
2418 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2419                           unsigned int flags)
2420 {
2421         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2422         unsigned charcount = font->charcount;
2423         int w = font->width;
2424         int h = font->height;
2425         int size;
2426         int i, csum;
2427         u8 *new_data, *data = font->data;
2428         int pitch = PITCH(font->width);
2429
2430         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2431          * If not this check should be changed to charcount < 256 */
2432         if (charcount != 256 && charcount != 512)
2433                 return -EINVAL;
2434
2435         /* Make sure drawing engine can handle the font */
2436         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2437             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2438                 return -EINVAL;
2439
2440         /* Make sure driver can handle the font length */
2441         if (fbcon_invalid_charcount(info, charcount))
2442                 return -EINVAL;
2443
2444         size = CALC_FONTSZ(h, pitch, charcount);
2445
2446         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2447
2448         if (!new_data)
2449                 return -ENOMEM;
2450
2451         memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2452
2453         new_data += FONT_EXTRA_WORDS * sizeof(int);
2454         FNTSIZE(new_data) = size;
2455         REFCOUNT(new_data) = 0; /* usage counter */
2456         for (i=0; i< charcount; i++) {
2457                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2458         }
2459
2460         /* Since linux has a nice crc32 function use it for counting font
2461          * checksums. */
2462         csum = crc32(0, new_data, size);
2463
2464         FNTSUM(new_data) = csum;
2465         /* Check if the same font is on some other console already */
2466         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2467                 struct vc_data *tmp = vc_cons[i].d;
2468
2469                 if (fb_display[i].userfont &&
2470                     fb_display[i].fontdata &&
2471                     FNTSUM(fb_display[i].fontdata) == csum &&
2472                     FNTSIZE(fb_display[i].fontdata) == size &&
2473                     tmp->vc_font.width == w &&
2474                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2475                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2476                         new_data = (u8 *)fb_display[i].fontdata;
2477                         break;
2478                 }
2479         }
2480         return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2481 }
2482
2483 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2484 {
2485         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2486         const struct font_desc *f;
2487
2488         if (!name)
2489                 f = get_default_font(info->var.xres, info->var.yres,
2490                                      info->pixmap.blit_x, info->pixmap.blit_y);
2491         else if (!(f = find_font(name)))
2492                 return -ENOENT;
2493
2494         font->width = f->width;
2495         font->height = f->height;
2496         return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2497 }
2498
2499 static u16 palette_red[16];
2500 static u16 palette_green[16];
2501 static u16 palette_blue[16];
2502
2503 static struct fb_cmap palette_cmap = {
2504         0, 16, palette_red, palette_green, palette_blue, NULL
2505 };
2506
2507 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2508 {
2509         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2510         int i, j, k, depth;
2511         u8 val;
2512
2513         if (fbcon_is_inactive(vc, info))
2514                 return;
2515
2516         if (!con_is_visible(vc))
2517                 return;
2518
2519         depth = fb_get_color_depth(&info->var, &info->fix);
2520         if (depth > 3) {
2521                 for (i = j = 0; i < 16; i++) {
2522                         k = table[i];
2523                         val = vc->vc_palette[j++];
2524                         palette_red[k] = (val << 8) | val;
2525                         val = vc->vc_palette[j++];
2526                         palette_green[k] = (val << 8) | val;
2527                         val = vc->vc_palette[j++];
2528                         palette_blue[k] = (val << 8) | val;
2529                 }
2530                 palette_cmap.len = 16;
2531                 palette_cmap.start = 0;
2532         /*
2533          * If framebuffer is capable of less than 16 colors,
2534          * use default palette of fbcon.
2535          */
2536         } else
2537                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2538
2539         fb_set_cmap(&palette_cmap, info);
2540 }
2541
2542 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2543 {
2544         return (u16 *) (vc->vc_origin + offset);
2545 }
2546
2547 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2548                                  int *px, int *py)
2549 {
2550         unsigned long ret;
2551         int x, y;
2552
2553         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2554                 unsigned long offset = (pos - vc->vc_origin) / 2;
2555
2556                 x = offset % vc->vc_cols;
2557                 y = offset / vc->vc_cols;
2558                 ret = pos + (vc->vc_cols - x) * 2;
2559         } else {
2560                 /* Should not happen */
2561                 x = y = 0;
2562                 ret = vc->vc_origin;
2563         }
2564         if (px)
2565                 *px = x;
2566         if (py)
2567                 *py = y;
2568         return ret;
2569 }
2570
2571 /* As we might be inside of softback, we may work with non-contiguous buffer,
2572    that's why we have to use a separate routine. */
2573 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2574 {
2575         while (cnt--) {
2576                 u16 a = scr_readw(p);
2577                 if (!vc->vc_can_do_color)
2578                         a ^= 0x0800;
2579                 else if (vc->vc_hi_font_mask == 0x100)
2580                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2581                             (((a) & 0x0e00) << 4);
2582                 else
2583                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2584                             (((a) & 0x0700) << 4);
2585                 scr_writew(a, p++);
2586         }
2587 }
2588
2589 void fbcon_suspended(struct fb_info *info)
2590 {
2591         struct vc_data *vc = NULL;
2592         struct fbcon_ops *ops = info->fbcon_par;
2593
2594         if (!ops || ops->currcon < 0)
2595                 return;
2596         vc = vc_cons[ops->currcon].d;
2597
2598         /* Clear cursor, restore saved data */
2599         fbcon_cursor(vc, CM_ERASE);
2600 }
2601
2602 void fbcon_resumed(struct fb_info *info)
2603 {
2604         struct vc_data *vc;
2605         struct fbcon_ops *ops = info->fbcon_par;
2606
2607         if (!ops || ops->currcon < 0)
2608                 return;
2609         vc = vc_cons[ops->currcon].d;
2610
2611         update_screen(vc);
2612 }
2613
2614 static void fbcon_modechanged(struct fb_info *info)
2615 {
2616         struct fbcon_ops *ops = info->fbcon_par;
2617         struct vc_data *vc;
2618         struct fbcon_display *p;
2619         int rows, cols;
2620
2621         if (!ops || ops->currcon < 0)
2622                 return;
2623         vc = vc_cons[ops->currcon].d;
2624         if (vc->vc_mode != KD_TEXT ||
2625             registered_fb[con2fb_map[ops->currcon]] != info)
2626                 return;
2627
2628         p = &fb_display[vc->vc_num];
2629         set_blitting_type(vc, info);
2630
2631         if (con_is_visible(vc)) {
2632                 var_to_display(p, &info->var, info);
2633                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2634                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2635                 cols /= vc->vc_font.width;
2636                 rows /= vc->vc_font.height;
2637                 vc_resize(vc, cols, rows);
2638                 updatescrollmode(p, info, vc);
2639                 scrollback_max = 0;
2640                 scrollback_current = 0;
2641
2642                 if (!fbcon_is_inactive(vc, info)) {
2643                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2644                     ops->update_start(info);
2645                 }
2646
2647                 fbcon_set_palette(vc, color_table);
2648                 update_screen(vc);
2649         }
2650 }
2651
2652 static void fbcon_set_all_vcs(struct fb_info *info)
2653 {
2654         struct fbcon_ops *ops = info->fbcon_par;
2655         struct vc_data *vc;
2656         struct fbcon_display *p;
2657         int i, rows, cols, fg = -1;
2658
2659         if (!ops || ops->currcon < 0)
2660                 return;
2661
2662         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2663                 vc = vc_cons[i].d;
2664                 if (!vc || vc->vc_mode != KD_TEXT ||
2665                     registered_fb[con2fb_map[i]] != info)
2666                         continue;
2667
2668                 if (con_is_visible(vc)) {
2669                         fg = i;
2670                         continue;
2671                 }
2672
2673                 p = &fb_display[vc->vc_num];
2674                 set_blitting_type(vc, info);
2675                 var_to_display(p, &info->var, info);
2676                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2677                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2678                 cols /= vc->vc_font.width;
2679                 rows /= vc->vc_font.height;
2680                 vc_resize(vc, cols, rows);
2681         }
2682
2683         if (fg != -1)
2684                 fbcon_modechanged(info);
2685 }
2686
2687
2688 void fbcon_update_vcs(struct fb_info *info, bool all)
2689 {
2690         if (all)
2691                 fbcon_set_all_vcs(info);
2692         else
2693                 fbcon_modechanged(info);
2694 }
2695 EXPORT_SYMBOL(fbcon_update_vcs);
2696
2697 int fbcon_mode_deleted(struct fb_info *info,
2698                        struct fb_videomode *mode)
2699 {
2700         struct fb_info *fb_info;
2701         struct fbcon_display *p;
2702         int i, j, found = 0;
2703
2704         /* before deletion, ensure that mode is not in use */
2705         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2706                 j = con2fb_map[i];
2707                 if (j == -1)
2708                         continue;
2709                 fb_info = registered_fb[j];
2710                 if (fb_info != info)
2711                         continue;
2712                 p = &fb_display[i];
2713                 if (!p || !p->mode)
2714                         continue;
2715                 if (fb_mode_is_equal(p->mode, mode)) {
2716                         found = 1;
2717                         break;
2718                 }
2719         }
2720         return found;
2721 }
2722
2723 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2724 static void fbcon_unbind(void)
2725 {
2726         int ret;
2727
2728         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2729                                 fbcon_is_default);
2730
2731         if (!ret)
2732                 fbcon_has_console_bind = 0;
2733 }
2734 #else
2735 static inline void fbcon_unbind(void) {}
2736 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2737
2738 /* called with console_lock held */
2739 void fbcon_fb_unbind(struct fb_info *info)
2740 {
2741         int i, new_idx = -1, ret = 0;
2742         int idx = info->node;
2743
2744         WARN_CONSOLE_UNLOCKED();
2745
2746         if (!fbcon_has_console_bind)
2747                 return;
2748
2749         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2750                 if (con2fb_map[i] != idx &&
2751                     con2fb_map[i] != -1) {
2752                         new_idx = con2fb_map[i];
2753                         break;
2754                 }
2755         }
2756
2757         if (new_idx != -1) {
2758                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2759                         if (con2fb_map[i] == idx)
2760                                 set_con2fb_map(i, new_idx, 0);
2761                 }
2762         } else {
2763                 struct fb_info *info = registered_fb[idx];
2764
2765                 /* This is sort of like set_con2fb_map, except it maps
2766                  * the consoles to no device and then releases the
2767                  * oldinfo to free memory and cancel the cursor blink
2768                  * timer. I can imagine this just becoming part of
2769                  * set_con2fb_map where new_idx is -1
2770                  */
2771                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2772                         if (con2fb_map[i] == idx) {
2773                                 con2fb_map[i] = -1;
2774                                 if (!search_fb_in_map(idx)) {
2775                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
2776                                                                      info, NULL, i,
2777                                                                      idx, 0);
2778                                         if (ret) {
2779                                                 con2fb_map[i] = idx;
2780                                                 return;
2781                                         }
2782                                 }
2783                         }
2784                 }
2785                 fbcon_unbind();
2786         }
2787 }
2788
2789 /* called with console_lock held */
2790 void fbcon_fb_unregistered(struct fb_info *info)
2791 {
2792         int i, idx;
2793
2794         WARN_CONSOLE_UNLOCKED();
2795
2796         if (deferred_takeover)
2797                 return;
2798
2799         idx = info->node;
2800         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2801                 if (con2fb_map[i] == idx)
2802                         con2fb_map[i] = -1;
2803         }
2804
2805         if (idx == info_idx) {
2806                 info_idx = -1;
2807
2808                 for_each_registered_fb(i) {
2809                         info_idx = i;
2810                         break;
2811                 }
2812         }
2813
2814         if (info_idx != -1) {
2815                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2816                         if (con2fb_map[i] == -1)
2817                                 con2fb_map[i] = info_idx;
2818                 }
2819         }
2820
2821         if (primary_device == idx)
2822                 primary_device = -1;
2823
2824         if (!num_registered_fb)
2825                 do_unregister_con_driver(&fb_con);
2826 }
2827
2828 void fbcon_remap_all(struct fb_info *info)
2829 {
2830         int i, idx = info->node;
2831
2832         console_lock();
2833         if (deferred_takeover) {
2834                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2835                         con2fb_map_boot[i] = idx;
2836                 fbcon_map_override();
2837                 console_unlock();
2838                 return;
2839         }
2840
2841         for (i = first_fb_vc; i <= last_fb_vc; i++)
2842                 set_con2fb_map(i, idx, 0);
2843
2844         if (con_is_bound(&fb_con)) {
2845                 printk(KERN_INFO "fbcon: Remapping primary device, "
2846                        "fb%i, to tty %i-%i\n", idx,
2847                        first_fb_vc + 1, last_fb_vc + 1);
2848                 info_idx = idx;
2849         }
2850         console_unlock();
2851 }
2852
2853 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
2854 static void fbcon_select_primary(struct fb_info *info)
2855 {
2856         if (!map_override && primary_device == -1 &&
2857             fb_is_primary_device(info)) {
2858                 int i;
2859
2860                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2861                        info->fix.id, info->node);
2862                 primary_device = info->node;
2863
2864                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2865                         con2fb_map_boot[i] = primary_device;
2866
2867                 if (con_is_bound(&fb_con)) {
2868                         printk(KERN_INFO "fbcon: Remapping primary device, "
2869                                "fb%i, to tty %i-%i\n", info->node,
2870                                first_fb_vc + 1, last_fb_vc + 1);
2871                         info_idx = primary_device;
2872                 }
2873         }
2874
2875 }
2876 #else
2877 static inline void fbcon_select_primary(struct fb_info *info)
2878 {
2879         return;
2880 }
2881 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2882
2883 /* called with console_lock held */
2884 int fbcon_fb_registered(struct fb_info *info)
2885 {
2886         int ret = 0, i, idx;
2887
2888         WARN_CONSOLE_UNLOCKED();
2889
2890         idx = info->node;
2891         fbcon_select_primary(info);
2892
2893         if (deferred_takeover) {
2894                 pr_info("fbcon: Deferring console take-over\n");
2895                 return 0;
2896         }
2897
2898         if (info_idx == -1) {
2899                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2900                         if (con2fb_map_boot[i] == idx) {
2901                                 info_idx = idx;
2902                                 break;
2903                         }
2904                 }
2905
2906                 if (info_idx != -1)
2907                         ret = do_fbcon_takeover(1);
2908         } else {
2909                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2910                         if (con2fb_map_boot[i] == idx)
2911                                 set_con2fb_map(i, idx, 0);
2912                 }
2913         }
2914
2915         return ret;
2916 }
2917
2918 void fbcon_fb_blanked(struct fb_info *info, int blank)
2919 {
2920         struct fbcon_ops *ops = info->fbcon_par;
2921         struct vc_data *vc;
2922
2923         if (!ops || ops->currcon < 0)
2924                 return;
2925
2926         vc = vc_cons[ops->currcon].d;
2927         if (vc->vc_mode != KD_TEXT ||
2928                         registered_fb[con2fb_map[ops->currcon]] != info)
2929                 return;
2930
2931         if (con_is_visible(vc)) {
2932                 if (blank)
2933                         do_blank_screen(0);
2934                 else
2935                         do_unblank_screen(0);
2936         }
2937         ops->blank_state = blank;
2938 }
2939
2940 void fbcon_new_modelist(struct fb_info *info)
2941 {
2942         int i;
2943         struct vc_data *vc;
2944         struct fb_var_screeninfo var;
2945         const struct fb_videomode *mode;
2946
2947         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2948                 if (registered_fb[con2fb_map[i]] != info)
2949                         continue;
2950                 if (!fb_display[i].mode)
2951                         continue;
2952                 vc = vc_cons[i].d;
2953                 display_to_var(&var, &fb_display[i]);
2954                 mode = fb_find_nearest_mode(fb_display[i].mode,
2955                                             &info->modelist);
2956                 fb_videomode_to_var(&var, mode);
2957                 fbcon_set_disp(info, &var, vc->vc_num);
2958         }
2959 }
2960
2961 void fbcon_get_requirement(struct fb_info *info,
2962                            struct fb_blit_caps *caps)
2963 {
2964         struct vc_data *vc;
2965
2966         if (caps->flags) {
2967                 int i, charcnt;
2968
2969                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2970                         vc = vc_cons[i].d;
2971                         if (vc && vc->vc_mode == KD_TEXT &&
2972                             info->node == con2fb_map[i]) {
2973                                 caps->x |= 1 << (vc->vc_font.width - 1);
2974                                 caps->y |= 1 << (vc->vc_font.height - 1);
2975                                 charcnt = vc->vc_font.charcount;
2976                                 if (caps->len < charcnt)
2977                                         caps->len = charcnt;
2978                         }
2979                 }
2980         } else {
2981                 vc = vc_cons[fg_console].d;
2982
2983                 if (vc && vc->vc_mode == KD_TEXT &&
2984                     info->node == con2fb_map[fg_console]) {
2985                         caps->x = 1 << (vc->vc_font.width - 1);
2986                         caps->y = 1 << (vc->vc_font.height - 1);
2987                         caps->len = vc->vc_font.charcount;
2988                 }
2989         }
2990 }
2991
2992 int fbcon_set_con2fb_map_ioctl(void __user *argp)
2993 {
2994         struct fb_con2fbmap con2fb;
2995         int ret;
2996
2997         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
2998                 return -EFAULT;
2999         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3000                 return -EINVAL;
3001         if (con2fb.framebuffer >= FB_MAX)
3002                 return -EINVAL;
3003         if (!registered_fb[con2fb.framebuffer])
3004                 request_module("fb%d", con2fb.framebuffer);
3005         if (!registered_fb[con2fb.framebuffer]) {
3006                 return -EINVAL;
3007         }
3008
3009         console_lock();
3010         ret = set_con2fb_map(con2fb.console - 1,
3011                              con2fb.framebuffer, 1);
3012         console_unlock();
3013
3014         return ret;
3015 }
3016
3017 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3018 {
3019         struct fb_con2fbmap con2fb;
3020
3021         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3022                 return -EFAULT;
3023         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3024                 return -EINVAL;
3025
3026         console_lock();
3027         con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3028         console_unlock();
3029
3030         return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3031 }
3032
3033 /*
3034  *  The console `switch' structure for the frame buffer based console
3035  */
3036
3037 static const struct consw fb_con = {
3038         .owner                  = THIS_MODULE,
3039         .con_startup            = fbcon_startup,
3040         .con_init               = fbcon_init,
3041         .con_deinit             = fbcon_deinit,
3042         .con_clear              = fbcon_clear,
3043         .con_putc               = fbcon_putc,
3044         .con_putcs              = fbcon_putcs,
3045         .con_cursor             = fbcon_cursor,
3046         .con_scroll             = fbcon_scroll,
3047         .con_switch             = fbcon_switch,
3048         .con_blank              = fbcon_blank,
3049         .con_font_set           = fbcon_set_font,
3050         .con_font_get           = fbcon_get_font,
3051         .con_font_default       = fbcon_set_def_font,
3052         .con_set_palette        = fbcon_set_palette,
3053         .con_invert_region      = fbcon_invert_region,
3054         .con_screen_pos         = fbcon_screen_pos,
3055         .con_getxy              = fbcon_getxy,
3056         .con_resize             = fbcon_resize,
3057         .con_debug_enter        = fbcon_debug_enter,
3058         .con_debug_leave        = fbcon_debug_leave,
3059 };
3060
3061 static ssize_t store_rotate(struct device *device,
3062                             struct device_attribute *attr, const char *buf,
3063                             size_t count)
3064 {
3065         struct fb_info *info;
3066         int rotate, idx;
3067         char **last = NULL;
3068
3069         console_lock();
3070         idx = con2fb_map[fg_console];
3071
3072         if (idx == -1 || registered_fb[idx] == NULL)
3073                 goto err;
3074
3075         info = registered_fb[idx];
3076         rotate = simple_strtoul(buf, last, 0);
3077         fbcon_rotate(info, rotate);
3078 err:
3079         console_unlock();
3080         return count;
3081 }
3082
3083 static ssize_t store_rotate_all(struct device *device,
3084                                 struct device_attribute *attr,const char *buf,
3085                                 size_t count)
3086 {
3087         struct fb_info *info;
3088         int rotate, idx;
3089         char **last = NULL;
3090
3091         console_lock();
3092         idx = con2fb_map[fg_console];
3093
3094         if (idx == -1 || registered_fb[idx] == NULL)
3095                 goto err;
3096
3097         info = registered_fb[idx];
3098         rotate = simple_strtoul(buf, last, 0);
3099         fbcon_rotate_all(info, rotate);
3100 err:
3101         console_unlock();
3102         return count;
3103 }
3104
3105 static ssize_t show_rotate(struct device *device,
3106                            struct device_attribute *attr,char *buf)
3107 {
3108         struct fb_info *info;
3109         int rotate = 0, idx;
3110
3111         console_lock();
3112         idx = con2fb_map[fg_console];
3113
3114         if (idx == -1 || registered_fb[idx] == NULL)
3115                 goto err;
3116
3117         info = registered_fb[idx];
3118         rotate = fbcon_get_rotate(info);
3119 err:
3120         console_unlock();
3121         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3122 }
3123
3124 static ssize_t show_cursor_blink(struct device *device,
3125                                  struct device_attribute *attr, char *buf)
3126 {
3127         struct fb_info *info;
3128         struct fbcon_ops *ops;
3129         int idx, blink = -1;
3130
3131         console_lock();
3132         idx = con2fb_map[fg_console];
3133
3134         if (idx == -1 || registered_fb[idx] == NULL)
3135                 goto err;
3136
3137         info = registered_fb[idx];
3138         ops = info->fbcon_par;
3139
3140         if (!ops)
3141                 goto err;
3142
3143         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3144 err:
3145         console_unlock();
3146         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3147 }
3148
3149 static ssize_t store_cursor_blink(struct device *device,
3150                                   struct device_attribute *attr,
3151                                   const char *buf, size_t count)
3152 {
3153         struct fb_info *info;
3154         int blink, idx;
3155         char **last = NULL;
3156
3157         console_lock();
3158         idx = con2fb_map[fg_console];
3159
3160         if (idx == -1 || registered_fb[idx] == NULL)
3161                 goto err;
3162
3163         info = registered_fb[idx];
3164
3165         if (!info->fbcon_par)
3166                 goto err;
3167
3168         blink = simple_strtoul(buf, last, 0);
3169
3170         if (blink) {
3171                 fbcon_cursor_noblink = 0;
3172                 fbcon_add_cursor_timer(info);
3173         } else {
3174                 fbcon_cursor_noblink = 1;
3175                 fbcon_del_cursor_timer(info);
3176         }
3177
3178 err:
3179         console_unlock();
3180         return count;
3181 }
3182
3183 static struct device_attribute device_attrs[] = {
3184         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3185         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3186         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3187                store_cursor_blink),
3188 };
3189
3190 static int fbcon_init_device(void)
3191 {
3192         int i, error = 0;
3193
3194         fbcon_has_sysfs = 1;
3195
3196         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3197                 error = device_create_file(fbcon_device, &device_attrs[i]);
3198
3199                 if (error)
3200                         break;
3201         }
3202
3203         if (error) {
3204                 while (--i >= 0)
3205                         device_remove_file(fbcon_device, &device_attrs[i]);
3206
3207                 fbcon_has_sysfs = 0;
3208         }
3209
3210         return 0;
3211 }
3212
3213 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3214 static void fbcon_register_existing_fbs(struct work_struct *work)
3215 {
3216         int i;
3217
3218         console_lock();
3219
3220         for_each_registered_fb(i)
3221                 fbcon_fb_registered(registered_fb[i]);
3222
3223         console_unlock();
3224 }
3225
3226 static struct notifier_block fbcon_output_nb;
3227 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3228
3229 static int fbcon_output_notifier(struct notifier_block *nb,
3230                                  unsigned long action, void *data)
3231 {
3232         WARN_CONSOLE_UNLOCKED();
3233
3234         pr_info("fbcon: Taking over console\n");
3235
3236         dummycon_unregister_output_notifier(&fbcon_output_nb);
3237         deferred_takeover = false;
3238         logo_shown = FBCON_LOGO_DONTSHOW;
3239
3240         /* We may get called in atomic context */
3241         schedule_work(&fbcon_deferred_takeover_work);
3242
3243         return NOTIFY_OK;
3244 }
3245 #endif
3246
3247 static void fbcon_start(void)
3248 {
3249         WARN_CONSOLE_UNLOCKED();
3250
3251 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3252         if (conswitchp != &dummy_con)
3253                 deferred_takeover = false;
3254
3255         if (deferred_takeover) {
3256                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3257                 dummycon_register_output_notifier(&fbcon_output_nb);
3258                 return;
3259         }
3260 #endif
3261
3262         if (num_registered_fb) {
3263                 int i;
3264
3265                 for_each_registered_fb(i) {
3266                         info_idx = i;
3267                         break;
3268                 }
3269
3270                 do_fbcon_takeover(0);
3271         }
3272 }
3273
3274 static void fbcon_exit(void)
3275 {
3276         struct fb_info *info;
3277         int i, j, mapped;
3278
3279 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3280         if (deferred_takeover) {
3281                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3282                 deferred_takeover = false;
3283         }
3284 #endif
3285
3286         for_each_registered_fb(i) {
3287                 int pending = 0;
3288
3289                 mapped = 0;
3290                 info = registered_fb[i];
3291
3292                 if (info->queue.func)
3293                         pending = cancel_work_sync(&info->queue);
3294                 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no"));
3295
3296                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3297                         if (con2fb_map[j] == i) {
3298                                 mapped = 1;
3299                                 con2fb_map[j] = -1;
3300                         }
3301                 }
3302
3303                 if (mapped) {
3304                         if (info->fbops->fb_release)
3305                                 info->fbops->fb_release(info, 0);
3306                         module_put(info->fbops->owner);
3307
3308                         if (info->fbcon_par) {
3309                                 struct fbcon_ops *ops = info->fbcon_par;
3310
3311                                 fbcon_del_cursor_timer(info);
3312                                 kfree(ops->cursor_src);
3313                                 kfree(ops->cursor_state.mask);
3314                                 kfree(info->fbcon_par);
3315                                 info->fbcon_par = NULL;
3316                         }
3317
3318                         if (info->queue.func == fb_flashcursor)
3319                                 info->queue.func = NULL;
3320                 }
3321         }
3322 }
3323
3324 void __init fb_console_init(void)
3325 {
3326         int i;
3327
3328         console_lock();
3329         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3330                                      "fbcon");
3331
3332         if (IS_ERR(fbcon_device)) {
3333                 printk(KERN_WARNING "Unable to create device "
3334                        "for fbcon; errno = %ld\n",
3335                        PTR_ERR(fbcon_device));
3336                 fbcon_device = NULL;
3337         } else
3338                 fbcon_init_device();
3339
3340         for (i = 0; i < MAX_NR_CONSOLES; i++)
3341                 con2fb_map[i] = -1;
3342
3343         fbcon_start();
3344         console_unlock();
3345 }
3346
3347 #ifdef MODULE
3348
3349 static void __exit fbcon_deinit_device(void)
3350 {
3351         int i;
3352
3353         if (fbcon_has_sysfs) {
3354                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3355                         device_remove_file(fbcon_device, &device_attrs[i]);
3356
3357                 fbcon_has_sysfs = 0;
3358         }
3359 }
3360
3361 void __exit fb_console_exit(void)
3362 {
3363         console_lock();
3364         fbcon_deinit_device();
3365         device_destroy(fb_class, MKDEV(0, 0));
3366         fbcon_exit();
3367         do_unregister_con_driver(&fb_con);
3368         console_unlock();
3369 }
3370 #endif