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 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1139         if ((info->flags & FBINFO_HWACCEL_COPYAREA) &&
1140             !(info->flags & FBINFO_HWACCEL_DISABLED))
1141                 p->scrollmode = SCROLL_MOVE;
1142         else /* default to something safe */
1143                 p->scrollmode = SCROLL_REDRAW;
1144 #endif
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         if (!ops->cursor)
1337                 return;
1338
1339         ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
1340                     get_color(vc, info, c, 0));
1341 }
1342
1343 static int scrollback_phys_max = 0;
1344 static int scrollback_max = 0;
1345 static int scrollback_current = 0;
1346
1347 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1348                            int unit)
1349 {
1350         struct fbcon_display *p, *t;
1351         struct vc_data **default_mode, *vc;
1352         struct vc_data *svc;
1353         struct fbcon_ops *ops = info->fbcon_par;
1354         int rows, cols;
1355
1356         p = &fb_display[unit];
1357
1358         if (var_to_display(p, var, info))
1359                 return;
1360
1361         vc = vc_cons[unit].d;
1362
1363         if (!vc)
1364                 return;
1365
1366         default_mode = vc->vc_display_fg;
1367         svc = *default_mode;
1368         t = &fb_display[svc->vc_num];
1369
1370         if (!vc->vc_font.data) {
1371                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1372                 vc->vc_font.width = (*default_mode)->vc_font.width;
1373                 vc->vc_font.height = (*default_mode)->vc_font.height;
1374                 vc->vc_font.charcount = (*default_mode)->vc_font.charcount;
1375                 p->userfont = t->userfont;
1376                 if (p->userfont)
1377                         REFCOUNT(p->fontdata)++;
1378         }
1379
1380         var->activate = FB_ACTIVATE_NOW;
1381         info->var.activate = var->activate;
1382         var->yoffset = info->var.yoffset;
1383         var->xoffset = info->var.xoffset;
1384         fb_set_var(info, var);
1385         ops->var = info->var;
1386         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1387         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1388         if (vc->vc_font.charcount == 256) {
1389                 vc->vc_hi_font_mask = 0;
1390         } else {
1391                 vc->vc_hi_font_mask = 0x100;
1392                 if (vc->vc_can_do_color)
1393                         vc->vc_complement_mask <<= 1;
1394         }
1395
1396         if (!*svc->vc_uni_pagedir_loc)
1397                 con_set_default_unimap(svc);
1398         if (!*vc->vc_uni_pagedir_loc)
1399                 con_copy_unimap(vc, svc);
1400
1401         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1402         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1403         cols /= vc->vc_font.width;
1404         rows /= vc->vc_font.height;
1405         vc_resize(vc, cols, rows);
1406
1407         if (con_is_visible(vc)) {
1408                 update_screen(vc);
1409         }
1410 }
1411
1412 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1413 {
1414         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1415         struct fbcon_ops *ops = info->fbcon_par;
1416         struct fbcon_display *p = &fb_display[vc->vc_num];
1417
1418         p->yscroll += count;
1419         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1420                 p->yscroll -= p->vrows;
1421         ops->var.xoffset = 0;
1422         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1423         ops->var.vmode |= FB_VMODE_YWRAP;
1424         ops->update_start(info);
1425         scrollback_max += count;
1426         if (scrollback_max > scrollback_phys_max)
1427                 scrollback_max = scrollback_phys_max;
1428         scrollback_current = 0;
1429 }
1430
1431 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1432 {
1433         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1434         struct fbcon_ops *ops = info->fbcon_par;
1435         struct fbcon_display *p = &fb_display[vc->vc_num];
1436
1437         p->yscroll -= count;
1438         if (p->yscroll < 0)     /* Deal with wrap */
1439                 p->yscroll += p->vrows;
1440         ops->var.xoffset = 0;
1441         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1442         ops->var.vmode |= FB_VMODE_YWRAP;
1443         ops->update_start(info);
1444         scrollback_max -= count;
1445         if (scrollback_max < 0)
1446                 scrollback_max = 0;
1447         scrollback_current = 0;
1448 }
1449
1450 static __inline__ void ypan_up(struct vc_data *vc, int count)
1451 {
1452         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1453         struct fbcon_display *p = &fb_display[vc->vc_num];
1454         struct fbcon_ops *ops = info->fbcon_par;
1455
1456         p->yscroll += count;
1457         if (p->yscroll > p->vrows - vc->vc_rows) {
1458                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1459                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1460                 p->yscroll -= p->vrows - vc->vc_rows;
1461         }
1462
1463         ops->var.xoffset = 0;
1464         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1465         ops->var.vmode &= ~FB_VMODE_YWRAP;
1466         ops->update_start(info);
1467         fbcon_clear_margins(vc, 1);
1468         scrollback_max += count;
1469         if (scrollback_max > scrollback_phys_max)
1470                 scrollback_max = scrollback_phys_max;
1471         scrollback_current = 0;
1472 }
1473
1474 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1475 {
1476         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1477         struct fbcon_ops *ops = info->fbcon_par;
1478         struct fbcon_display *p = &fb_display[vc->vc_num];
1479
1480         p->yscroll += count;
1481
1482         if (p->yscroll > p->vrows - vc->vc_rows) {
1483                 p->yscroll -= p->vrows - vc->vc_rows;
1484                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1485         }
1486
1487         ops->var.xoffset = 0;
1488         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1489         ops->var.vmode &= ~FB_VMODE_YWRAP;
1490         ops->update_start(info);
1491         fbcon_clear_margins(vc, 1);
1492         scrollback_max += count;
1493         if (scrollback_max > scrollback_phys_max)
1494                 scrollback_max = scrollback_phys_max;
1495         scrollback_current = 0;
1496 }
1497
1498 static __inline__ void ypan_down(struct vc_data *vc, int count)
1499 {
1500         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1501         struct fbcon_display *p = &fb_display[vc->vc_num];
1502         struct fbcon_ops *ops = info->fbcon_par;
1503
1504         p->yscroll -= count;
1505         if (p->yscroll < 0) {
1506                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1507                             0, vc->vc_rows, vc->vc_cols);
1508                 p->yscroll += p->vrows - vc->vc_rows;
1509         }
1510
1511         ops->var.xoffset = 0;
1512         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1513         ops->var.vmode &= ~FB_VMODE_YWRAP;
1514         ops->update_start(info);
1515         fbcon_clear_margins(vc, 1);
1516         scrollback_max -= count;
1517         if (scrollback_max < 0)
1518                 scrollback_max = 0;
1519         scrollback_current = 0;
1520 }
1521
1522 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1523 {
1524         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1525         struct fbcon_ops *ops = info->fbcon_par;
1526         struct fbcon_display *p = &fb_display[vc->vc_num];
1527
1528         p->yscroll -= count;
1529
1530         if (p->yscroll < 0) {
1531                 p->yscroll += p->vrows - vc->vc_rows;
1532                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1533         }
1534
1535         ops->var.xoffset = 0;
1536         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1537         ops->var.vmode &= ~FB_VMODE_YWRAP;
1538         ops->update_start(info);
1539         fbcon_clear_margins(vc, 1);
1540         scrollback_max -= count;
1541         if (scrollback_max < 0)
1542                 scrollback_max = 0;
1543         scrollback_current = 0;
1544 }
1545
1546 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1547                               int line, int count, int dy)
1548 {
1549         unsigned short *s = (unsigned short *)
1550                 (vc->vc_origin + vc->vc_size_row * line);
1551
1552         while (count--) {
1553                 unsigned short *start = s;
1554                 unsigned short *le = advance_row(s, 1);
1555                 unsigned short c;
1556                 int x = 0;
1557                 unsigned short attr = 1;
1558
1559                 do {
1560                         c = scr_readw(s);
1561                         if (attr != (c & 0xff00)) {
1562                                 attr = c & 0xff00;
1563                                 if (s > start) {
1564                                         fbcon_putcs(vc, start, s - start,
1565                                                     dy, x);
1566                                         x += s - start;
1567                                         start = s;
1568                                 }
1569                         }
1570                         console_conditional_schedule();
1571                         s++;
1572                 } while (s < le);
1573                 if (s > start)
1574                         fbcon_putcs(vc, start, s - start, dy, x);
1575                 console_conditional_schedule();
1576                 dy++;
1577         }
1578 }
1579
1580 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1581                         struct fbcon_display *p, int line, int count, int ycount)
1582 {
1583         int offset = ycount * vc->vc_cols;
1584         unsigned short *d = (unsigned short *)
1585             (vc->vc_origin + vc->vc_size_row * line);
1586         unsigned short *s = d + offset;
1587         struct fbcon_ops *ops = info->fbcon_par;
1588
1589         while (count--) {
1590                 unsigned short *start = s;
1591                 unsigned short *le = advance_row(s, 1);
1592                 unsigned short c;
1593                 int x = 0;
1594
1595                 do {
1596                         c = scr_readw(s);
1597
1598                         if (c == scr_readw(d)) {
1599                                 if (s > start) {
1600                                         ops->bmove(vc, info, line + ycount, x,
1601                                                    line, x, 1, s-start);
1602                                         x += s - start + 1;
1603                                         start = s + 1;
1604                                 } else {
1605                                         x++;
1606                                         start++;
1607                                 }
1608                         }
1609
1610                         scr_writew(c, d);
1611                         console_conditional_schedule();
1612                         s++;
1613                         d++;
1614                 } while (s < le);
1615                 if (s > start)
1616                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1617                                    s-start);
1618                 console_conditional_schedule();
1619                 if (ycount > 0)
1620                         line++;
1621                 else {
1622                         line--;
1623                         /* NOTE: We subtract two lines from these pointers */
1624                         s -= vc->vc_size_row;
1625                         d -= vc->vc_size_row;
1626                 }
1627         }
1628 }
1629
1630 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1631                          int line, int count, int offset)
1632 {
1633         unsigned short *d = (unsigned short *)
1634             (vc->vc_origin + vc->vc_size_row * line);
1635         unsigned short *s = d + offset;
1636
1637         while (count--) {
1638                 unsigned short *start = s;
1639                 unsigned short *le = advance_row(s, 1);
1640                 unsigned short c;
1641                 int x = 0;
1642                 unsigned short attr = 1;
1643
1644                 do {
1645                         c = scr_readw(s);
1646                         if (attr != (c & 0xff00)) {
1647                                 attr = c & 0xff00;
1648                                 if (s > start) {
1649                                         fbcon_putcs(vc, start, s - start,
1650                                                     line, x);
1651                                         x += s - start;
1652                                         start = s;
1653                                 }
1654                         }
1655                         if (c == scr_readw(d)) {
1656                                 if (s > start) {
1657                                         fbcon_putcs(vc, start, s - start,
1658                                                      line, x);
1659                                         x += s - start + 1;
1660                                         start = s + 1;
1661                                 } else {
1662                                         x++;
1663                                         start++;
1664                                 }
1665                         }
1666                         scr_writew(c, d);
1667                         console_conditional_schedule();
1668                         s++;
1669                         d++;
1670                 } while (s < le);
1671                 if (s > start)
1672                         fbcon_putcs(vc, start, s - start, line, x);
1673                 console_conditional_schedule();
1674                 if (offset > 0)
1675                         line++;
1676                 else {
1677                         line--;
1678                         /* NOTE: We subtract two lines from these pointers */
1679                         s -= vc->vc_size_row;
1680                         d -= vc->vc_size_row;
1681                 }
1682         }
1683 }
1684
1685 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1686                 enum con_scroll dir, unsigned int count)
1687 {
1688         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1689         struct fbcon_display *p = &fb_display[vc->vc_num];
1690         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1691
1692         if (fbcon_is_inactive(vc, info))
1693                 return true;
1694
1695         fbcon_cursor(vc, CM_ERASE);
1696
1697         /*
1698          * ++Geert: Only use ywrap/ypan if the console is in text mode
1699          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1700          *           whole screen (prevents flicker).
1701          */
1702
1703         switch (dir) {
1704         case SM_UP:
1705                 if (count > vc->vc_rows)        /* Maximum realistic size */
1706                         count = vc->vc_rows;
1707                 if (logo_shown >= 0)
1708                         goto redraw_up;
1709                 switch (fb_scrollmode(p)) {
1710                 case SCROLL_MOVE:
1711                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1712                                      count);
1713                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1714                         scr_memsetw((unsigned short *) (vc->vc_origin +
1715                                                         vc->vc_size_row *
1716                                                         (b - count)),
1717                                     vc->vc_video_erase_char,
1718                                     vc->vc_size_row * count);
1719                         return true;
1720
1721                 case SCROLL_WRAP_MOVE:
1722                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1723                                 if (t > 0)
1724                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1725                                                     vc->vc_cols);
1726                                 ywrap_up(vc, count);
1727                                 if (vc->vc_rows - b > 0)
1728                                         fbcon_bmove(vc, b - count, 0, b, 0,
1729                                                     vc->vc_rows - b,
1730                                                     vc->vc_cols);
1731                         } else if (info->flags & FBINFO_READS_FAST)
1732                                 fbcon_bmove(vc, t + count, 0, t, 0,
1733                                             b - t - count, vc->vc_cols);
1734                         else
1735                                 goto redraw_up;
1736                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1737                         break;
1738
1739                 case SCROLL_PAN_REDRAW:
1740                         if ((p->yscroll + count <=
1741                              2 * (p->vrows - vc->vc_rows))
1742                             && ((!scroll_partial && (b - t == vc->vc_rows))
1743                                 || (scroll_partial
1744                                     && (b - t - count >
1745                                         3 * vc->vc_rows >> 2)))) {
1746                                 if (t > 0)
1747                                         fbcon_redraw_move(vc, p, 0, t, count);
1748                                 ypan_up_redraw(vc, t, count);
1749                                 if (vc->vc_rows - b > 0)
1750                                         fbcon_redraw_move(vc, p, b,
1751                                                           vc->vc_rows - b, b);
1752                         } else
1753                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1754                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1755                         break;
1756
1757                 case SCROLL_PAN_MOVE:
1758                         if ((p->yscroll + count <=
1759                              2 * (p->vrows - vc->vc_rows))
1760                             && ((!scroll_partial && (b - t == vc->vc_rows))
1761                                 || (scroll_partial
1762                                     && (b - t - count >
1763                                         3 * vc->vc_rows >> 2)))) {
1764                                 if (t > 0)
1765                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1766                                                     vc->vc_cols);
1767                                 ypan_up(vc, count);
1768                                 if (vc->vc_rows - b > 0)
1769                                         fbcon_bmove(vc, b - count, 0, b, 0,
1770                                                     vc->vc_rows - b,
1771                                                     vc->vc_cols);
1772                         } else if (info->flags & FBINFO_READS_FAST)
1773                                 fbcon_bmove(vc, t + count, 0, t, 0,
1774                                             b - t - count, vc->vc_cols);
1775                         else
1776                                 goto redraw_up;
1777                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1778                         break;
1779
1780                 case SCROLL_REDRAW:
1781                       redraw_up:
1782                         fbcon_redraw(vc, p, t, b - t - count,
1783                                      count * vc->vc_cols);
1784                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1785                         scr_memsetw((unsigned short *) (vc->vc_origin +
1786                                                         vc->vc_size_row *
1787                                                         (b - count)),
1788                                     vc->vc_video_erase_char,
1789                                     vc->vc_size_row * count);
1790                         return true;
1791                 }
1792                 break;
1793
1794         case SM_DOWN:
1795                 if (count > vc->vc_rows)        /* Maximum realistic size */
1796                         count = vc->vc_rows;
1797                 if (logo_shown >= 0)
1798                         goto redraw_down;
1799                 switch (fb_scrollmode(p)) {
1800                 case SCROLL_MOVE:
1801                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1802                                      -count);
1803                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1804                         scr_memsetw((unsigned short *) (vc->vc_origin +
1805                                                         vc->vc_size_row *
1806                                                         t),
1807                                     vc->vc_video_erase_char,
1808                                     vc->vc_size_row * count);
1809                         return true;
1810
1811                 case SCROLL_WRAP_MOVE:
1812                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1813                                 if (vc->vc_rows - b > 0)
1814                                         fbcon_bmove(vc, b, 0, b - count, 0,
1815                                                     vc->vc_rows - b,
1816                                                     vc->vc_cols);
1817                                 ywrap_down(vc, count);
1818                                 if (t > 0)
1819                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1820                                                     vc->vc_cols);
1821                         } else if (info->flags & FBINFO_READS_FAST)
1822                                 fbcon_bmove(vc, t, 0, t + count, 0,
1823                                             b - t - count, vc->vc_cols);
1824                         else
1825                                 goto redraw_down;
1826                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1827                         break;
1828
1829                 case SCROLL_PAN_MOVE:
1830                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1831                             && ((!scroll_partial && (b - t == vc->vc_rows))
1832                                 || (scroll_partial
1833                                     && (b - t - count >
1834                                         3 * vc->vc_rows >> 2)))) {
1835                                 if (vc->vc_rows - b > 0)
1836                                         fbcon_bmove(vc, b, 0, b - count, 0,
1837                                                     vc->vc_rows - b,
1838                                                     vc->vc_cols);
1839                                 ypan_down(vc, count);
1840                                 if (t > 0)
1841                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1842                                                     vc->vc_cols);
1843                         } else if (info->flags & FBINFO_READS_FAST)
1844                                 fbcon_bmove(vc, t, 0, t + count, 0,
1845                                             b - t - count, vc->vc_cols);
1846                         else
1847                                 goto redraw_down;
1848                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1849                         break;
1850
1851                 case SCROLL_PAN_REDRAW:
1852                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1853                             && ((!scroll_partial && (b - t == vc->vc_rows))
1854                                 || (scroll_partial
1855                                     && (b - t - count >
1856                                         3 * vc->vc_rows >> 2)))) {
1857                                 if (vc->vc_rows - b > 0)
1858                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1859                                                           b - count);
1860                                 ypan_down_redraw(vc, t, count);
1861                                 if (t > 0)
1862                                         fbcon_redraw_move(vc, p, count, t, 0);
1863                         } else
1864                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1865                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1866                         break;
1867
1868                 case SCROLL_REDRAW:
1869                       redraw_down:
1870                         fbcon_redraw(vc, p, b - 1, b - t - count,
1871                                      -count * vc->vc_cols);
1872                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1873                         scr_memsetw((unsigned short *) (vc->vc_origin +
1874                                                         vc->vc_size_row *
1875                                                         t),
1876                                     vc->vc_video_erase_char,
1877                                     vc->vc_size_row * count);
1878                         return true;
1879                 }
1880         }
1881         return false;
1882 }
1883
1884
1885 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1886                         int height, int width)
1887 {
1888         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1889         struct fbcon_display *p = &fb_display[vc->vc_num];
1890
1891         if (fbcon_is_inactive(vc, info))
1892                 return;
1893
1894         if (!width || !height)
1895                 return;
1896
1897         /*  Split blits that cross physical y_wrap case.
1898          *  Pathological case involves 4 blits, better to use recursive
1899          *  code rather than unrolled case
1900          *
1901          *  Recursive invocations don't need to erase the cursor over and
1902          *  over again, so we use fbcon_bmove_rec()
1903          */
1904         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1905                         p->vrows - p->yscroll);
1906 }
1907
1908 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
1909                             int dy, int dx, int height, int width, u_int y_break)
1910 {
1911         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1912         struct fbcon_ops *ops = info->fbcon_par;
1913         u_int b;
1914
1915         if (sy < y_break && sy + height > y_break) {
1916                 b = y_break - sy;
1917                 if (dy < sy) {  /* Avoid trashing self */
1918                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1919                                         y_break);
1920                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1921                                         height - b, width, y_break);
1922                 } else {
1923                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1924                                         height - b, width, y_break);
1925                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1926                                         y_break);
1927                 }
1928                 return;
1929         }
1930
1931         if (dy < y_break && dy + height > y_break) {
1932                 b = y_break - dy;
1933                 if (dy < sy) {  /* Avoid trashing self */
1934                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1935                                         y_break);
1936                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1937                                         height - b, width, y_break);
1938                 } else {
1939                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1940                                         height - b, width, y_break);
1941                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1942                                         y_break);
1943                 }
1944                 return;
1945         }
1946         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
1947                    height, width);
1948 }
1949
1950 static void updatescrollmode_accel(struct fbcon_display *p,
1951                                         struct fb_info *info,
1952                                         struct vc_data *vc)
1953 {
1954 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION
1955         struct fbcon_ops *ops = info->fbcon_par;
1956         int cap = info->flags;
1957         u16 t = 0;
1958         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
1959                                   info->fix.xpanstep);
1960         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
1961         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1962         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1963                                    info->var.xres_virtual);
1964         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
1965                 divides(ypan, vc->vc_font.height) && vyres > yres;
1966         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
1967                 divides(ywrap, vc->vc_font.height) &&
1968                 divides(vc->vc_font.height, vyres) &&
1969                 divides(vc->vc_font.height, yres);
1970         int reading_fast = cap & FBINFO_READS_FAST;
1971         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
1972                 !(cap & FBINFO_HWACCEL_DISABLED);
1973         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
1974                 !(cap & FBINFO_HWACCEL_DISABLED);
1975
1976         if (good_wrap || good_pan) {
1977                 if (reading_fast || fast_copyarea)
1978                         p->scrollmode = good_wrap ?
1979                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
1980                 else
1981                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
1982                                 SCROLL_PAN_REDRAW;
1983         } else {
1984                 if (reading_fast || (fast_copyarea && !fast_imageblit))
1985                         p->scrollmode = SCROLL_MOVE;
1986                 else
1987                         p->scrollmode = SCROLL_REDRAW;
1988         }
1989 #endif
1990 }
1991
1992 static void updatescrollmode(struct fbcon_display *p,
1993                                         struct fb_info *info,
1994                                         struct vc_data *vc)
1995 {
1996         struct fbcon_ops *ops = info->fbcon_par;
1997         int fh = vc->vc_font.height;
1998         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1999         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2000                                    info->var.xres_virtual);
2001
2002         p->vrows = vyres/fh;
2003         if (yres > (fh * (vc->vc_rows + 1)))
2004                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2005         if ((yres % fh) && (vyres % fh < yres % fh))
2006                 p->vrows--;
2007
2008         /* update scrollmode in case hardware acceleration is used */
2009         updatescrollmode_accel(p, info, vc);
2010 }
2011
2012 #define PITCH(w) (((w) + 7) >> 3)
2013 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
2014
2015 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2016                         unsigned int height, unsigned int user)
2017 {
2018         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2019         struct fbcon_ops *ops = info->fbcon_par;
2020         struct fbcon_display *p = &fb_display[vc->vc_num];
2021         struct fb_var_screeninfo var = info->var;
2022         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2023
2024         if (p->userfont && FNTSIZE(vc->vc_font.data)) {
2025                 int size;
2026                 int pitch = PITCH(vc->vc_font.width);
2027
2028                 /*
2029                  * If user font, ensure that a possible change to user font
2030                  * height or width will not allow a font data out-of-bounds access.
2031                  * NOTE: must use original charcount in calculation as font
2032                  * charcount can change and cannot be used to determine the
2033                  * font data allocated size.
2034                  */
2035                 if (pitch <= 0)
2036                         return -EINVAL;
2037                 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
2038                 if (size > FNTSIZE(vc->vc_font.data))
2039                         return -EINVAL;
2040         }
2041
2042         virt_w = FBCON_SWAP(ops->rotate, width, height);
2043         virt_h = FBCON_SWAP(ops->rotate, height, width);
2044         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2045                                  vc->vc_font.height);
2046         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2047                                  vc->vc_font.width);
2048         var.xres = virt_w * virt_fw;
2049         var.yres = virt_h * virt_fh;
2050         x_diff = info->var.xres - var.xres;
2051         y_diff = info->var.yres - var.yres;
2052         if (x_diff < 0 || x_diff > virt_fw ||
2053             y_diff < 0 || y_diff > virt_fh) {
2054                 const struct fb_videomode *mode;
2055
2056                 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2057                 mode = fb_find_best_mode(&var, &info->modelist);
2058                 if (mode == NULL)
2059                         return -EINVAL;
2060                 display_to_var(&var, p);
2061                 fb_videomode_to_var(&var, mode);
2062
2063                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2064                         return -EINVAL;
2065
2066                 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2067                 if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
2068                         var.activate = FB_ACTIVATE_NOW |
2069                                 FB_ACTIVATE_FORCE;
2070                         fb_set_var(info, &var);
2071                 }
2072                 var_to_display(p, &info->var, info);
2073                 ops->var = info->var;
2074         }
2075         updatescrollmode(p, info, vc);
2076         return 0;
2077 }
2078
2079 static int fbcon_switch(struct vc_data *vc)
2080 {
2081         struct fb_info *info, *old_info = NULL;
2082         struct fbcon_ops *ops;
2083         struct fbcon_display *p = &fb_display[vc->vc_num];
2084         struct fb_var_screeninfo var;
2085         int i, ret, prev_console;
2086
2087         info = registered_fb[con2fb_map[vc->vc_num]];
2088         ops = info->fbcon_par;
2089
2090         if (logo_shown >= 0) {
2091                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2092
2093                 if (conp2->vc_top == logo_lines
2094                     && conp2->vc_bottom == conp2->vc_rows)
2095                         conp2->vc_top = 0;
2096                 logo_shown = FBCON_LOGO_CANSHOW;
2097         }
2098
2099         prev_console = ops->currcon;
2100         if (prev_console != -1)
2101                 old_info = registered_fb[con2fb_map[prev_console]];
2102         /*
2103          * FIXME: If we have multiple fbdev's loaded, we need to
2104          * update all info->currcon.  Perhaps, we can place this
2105          * in a centralized structure, but this might break some
2106          * drivers.
2107          *
2108          * info->currcon = vc->vc_num;
2109          */
2110         for_each_registered_fb(i) {
2111                 if (registered_fb[i]->fbcon_par) {
2112                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2113
2114                         o->currcon = vc->vc_num;
2115                 }
2116         }
2117         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2118         display_to_var(&var, p);
2119         var.activate = FB_ACTIVATE_NOW;
2120
2121         /*
2122          * make sure we don't unnecessarily trip the memcmp()
2123          * in fb_set_var()
2124          */
2125         info->var.activate = var.activate;
2126         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2127         fb_set_var(info, &var);
2128         ops->var = info->var;
2129
2130         if (old_info != NULL && (old_info != info ||
2131                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2132                 if (info->fbops->fb_set_par) {
2133                         ret = info->fbops->fb_set_par(info);
2134
2135                         if (ret)
2136                                 printk(KERN_ERR "fbcon_switch: detected "
2137                                         "unhandled fb_set_par error, "
2138                                         "error code %d\n", ret);
2139                 }
2140
2141                 if (old_info != info)
2142                         fbcon_del_cursor_timer(old_info);
2143         }
2144
2145         if (fbcon_is_inactive(vc, info) ||
2146             ops->blank_state != FB_BLANK_UNBLANK)
2147                 fbcon_del_cursor_timer(info);
2148         else
2149                 fbcon_add_cursor_timer(info);
2150
2151         set_blitting_type(vc, info);
2152         ops->cursor_reset = 1;
2153
2154         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2155                 ops->rotate = FB_ROTATE_UR;
2156                 set_blitting_type(vc, info);
2157         }
2158
2159         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2160         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2161
2162         if (vc->vc_font.charcount > 256)
2163                 vc->vc_complement_mask <<= 1;
2164
2165         updatescrollmode(p, info, vc);
2166
2167         switch (fb_scrollmode(p)) {
2168         case SCROLL_WRAP_MOVE:
2169                 scrollback_phys_max = p->vrows - vc->vc_rows;
2170                 break;
2171         case SCROLL_PAN_MOVE:
2172         case SCROLL_PAN_REDRAW:
2173                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2174                 if (scrollback_phys_max < 0)
2175                         scrollback_phys_max = 0;
2176                 break;
2177         default:
2178                 scrollback_phys_max = 0;
2179                 break;
2180         }
2181
2182         scrollback_max = 0;
2183         scrollback_current = 0;
2184
2185         if (!fbcon_is_inactive(vc, info)) {
2186             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2187             ops->update_start(info);
2188         }
2189
2190         fbcon_set_palette(vc, color_table);
2191         fbcon_clear_margins(vc, 0);
2192
2193         if (logo_shown == FBCON_LOGO_DRAW) {
2194
2195                 logo_shown = fg_console;
2196                 /* This is protected above by initmem_freed */
2197                 fb_show_logo(info, ops->rotate);
2198                 update_region(vc,
2199                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2200                               vc->vc_size_row * (vc->vc_bottom -
2201                                                  vc->vc_top) / 2);
2202                 return 0;
2203         }
2204         return 1;
2205 }
2206
2207 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2208                                 int blank)
2209 {
2210         if (blank) {
2211                 unsigned short charmask = vc->vc_hi_font_mask ?
2212                         0x1ff : 0xff;
2213                 unsigned short oldc;
2214
2215                 oldc = vc->vc_video_erase_char;
2216                 vc->vc_video_erase_char &= charmask;
2217                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2218                 vc->vc_video_erase_char = oldc;
2219         }
2220 }
2221
2222 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2223 {
2224         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2225         struct fbcon_ops *ops = info->fbcon_par;
2226
2227         if (mode_switch) {
2228                 struct fb_var_screeninfo var = info->var;
2229
2230                 ops->graphics = 1;
2231
2232                 if (!blank) {
2233                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2234                                 FB_ACTIVATE_KD_TEXT;
2235                         fb_set_var(info, &var);
2236                         ops->graphics = 0;
2237                         ops->var = info->var;
2238                 }
2239         }
2240
2241         if (!fbcon_is_inactive(vc, info)) {
2242                 if (ops->blank_state != blank) {
2243                         ops->blank_state = blank;
2244                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2245                         ops->cursor_flash = (!blank);
2246
2247                         if (fb_blank(info, blank))
2248                                 fbcon_generic_blank(vc, info, blank);
2249                 }
2250
2251                 if (!blank)
2252                         update_screen(vc);
2253         }
2254
2255         if (mode_switch || fbcon_is_inactive(vc, info) ||
2256             ops->blank_state != FB_BLANK_UNBLANK)
2257                 fbcon_del_cursor_timer(info);
2258         else
2259                 fbcon_add_cursor_timer(info);
2260
2261         return 0;
2262 }
2263
2264 static int fbcon_debug_enter(struct vc_data *vc)
2265 {
2266         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2267         struct fbcon_ops *ops = info->fbcon_par;
2268
2269         ops->save_graphics = ops->graphics;
2270         ops->graphics = 0;
2271         if (info->fbops->fb_debug_enter)
2272                 info->fbops->fb_debug_enter(info);
2273         fbcon_set_palette(vc, color_table);
2274         return 0;
2275 }
2276
2277 static int fbcon_debug_leave(struct vc_data *vc)
2278 {
2279         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2280         struct fbcon_ops *ops = info->fbcon_par;
2281
2282         ops->graphics = ops->save_graphics;
2283         if (info->fbops->fb_debug_leave)
2284                 info->fbops->fb_debug_leave(info);
2285         return 0;
2286 }
2287
2288 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2289 {
2290         u8 *fontdata = vc->vc_font.data;
2291         u8 *data = font->data;
2292         int i, j;
2293
2294         font->width = vc->vc_font.width;
2295         font->height = vc->vc_font.height;
2296         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2297         if (!font->data)
2298                 return 0;
2299
2300         if (font->width <= 8) {
2301                 j = vc->vc_font.height;
2302                 if (font->charcount * j > FNTSIZE(fontdata))
2303                         return -EINVAL;
2304
2305                 for (i = 0; i < font->charcount; i++) {
2306                         memcpy(data, fontdata, j);
2307                         memset(data + j, 0, 32 - j);
2308                         data += 32;
2309                         fontdata += j;
2310                 }
2311         } else if (font->width <= 16) {
2312                 j = vc->vc_font.height * 2;
2313                 if (font->charcount * j > FNTSIZE(fontdata))
2314                         return -EINVAL;
2315
2316                 for (i = 0; i < font->charcount; i++) {
2317                         memcpy(data, fontdata, j);
2318                         memset(data + j, 0, 64 - j);
2319                         data += 64;
2320                         fontdata += j;
2321                 }
2322         } else if (font->width <= 24) {
2323                 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2324                         return -EINVAL;
2325
2326                 for (i = 0; i < font->charcount; i++) {
2327                         for (j = 0; j < vc->vc_font.height; j++) {
2328                                 *data++ = fontdata[0];
2329                                 *data++ = fontdata[1];
2330                                 *data++ = fontdata[2];
2331                                 fontdata += sizeof(u32);
2332                         }
2333                         memset(data, 0, 3 * (32 - j));
2334                         data += 3 * (32 - j);
2335                 }
2336         } else {
2337                 j = vc->vc_font.height * 4;
2338                 if (font->charcount * j > FNTSIZE(fontdata))
2339                         return -EINVAL;
2340
2341                 for (i = 0; i < font->charcount; i++) {
2342                         memcpy(data, fontdata, j);
2343                         memset(data + j, 0, 128 - j);
2344                         data += 128;
2345                         fontdata += j;
2346                 }
2347         }
2348         return 0;
2349 }
2350
2351 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2352 static void set_vc_hi_font(struct vc_data *vc, bool set)
2353 {
2354         if (!set) {
2355                 vc->vc_hi_font_mask = 0;
2356                 if (vc->vc_can_do_color) {
2357                         vc->vc_complement_mask >>= 1;
2358                         vc->vc_s_complement_mask >>= 1;
2359                 }
2360
2361                 /* ++Edmund: reorder the attribute bits */
2362                 if (vc->vc_can_do_color) {
2363                         unsigned short *cp =
2364                             (unsigned short *) vc->vc_origin;
2365                         int count = vc->vc_screenbuf_size / 2;
2366                         unsigned short c;
2367                         for (; count > 0; count--, cp++) {
2368                                 c = scr_readw(cp);
2369                                 scr_writew(((c & 0xfe00) >> 1) |
2370                                            (c & 0xff), cp);
2371                         }
2372                         c = vc->vc_video_erase_char;
2373                         vc->vc_video_erase_char =
2374                             ((c & 0xfe00) >> 1) | (c & 0xff);
2375                         vc->vc_attr >>= 1;
2376                 }
2377         } else {
2378                 vc->vc_hi_font_mask = 0x100;
2379                 if (vc->vc_can_do_color) {
2380                         vc->vc_complement_mask <<= 1;
2381                         vc->vc_s_complement_mask <<= 1;
2382                 }
2383
2384                 /* ++Edmund: reorder the attribute bits */
2385                 {
2386                         unsigned short *cp =
2387                             (unsigned short *) vc->vc_origin;
2388                         int count = vc->vc_screenbuf_size / 2;
2389                         unsigned short c;
2390                         for (; count > 0; count--, cp++) {
2391                                 unsigned short newc;
2392                                 c = scr_readw(cp);
2393                                 if (vc->vc_can_do_color)
2394                                         newc =
2395                                             ((c & 0xff00) << 1) | (c &
2396                                                                    0xff);
2397                                 else
2398                                         newc = c & ~0x100;
2399                                 scr_writew(newc, cp);
2400                         }
2401                         c = vc->vc_video_erase_char;
2402                         if (vc->vc_can_do_color) {
2403                                 vc->vc_video_erase_char =
2404                                     ((c & 0xff00) << 1) | (c & 0xff);
2405                                 vc->vc_attr <<= 1;
2406                         } else
2407                                 vc->vc_video_erase_char = c & ~0x100;
2408                 }
2409         }
2410 }
2411
2412 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2413                              const u8 * data, int userfont)
2414 {
2415         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2416         struct fbcon_ops *ops = info->fbcon_par;
2417         struct fbcon_display *p = &fb_display[vc->vc_num];
2418         int resize;
2419         char *old_data = NULL;
2420
2421         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2422         if (p->userfont)
2423                 old_data = vc->vc_font.data;
2424         vc->vc_font.data = (void *)(p->fontdata = data);
2425         if ((p->userfont = userfont))
2426                 REFCOUNT(data)++;
2427         vc->vc_font.width = w;
2428         vc->vc_font.height = h;
2429         vc->vc_font.charcount = charcount;
2430         if (vc->vc_hi_font_mask && charcount == 256)
2431                 set_vc_hi_font(vc, false);
2432         else if (!vc->vc_hi_font_mask && charcount == 512)
2433                 set_vc_hi_font(vc, true);
2434
2435         if (resize) {
2436                 int cols, rows;
2437
2438                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2439                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2440                 cols /= w;
2441                 rows /= h;
2442                 vc_resize(vc, cols, rows);
2443         } else if (con_is_visible(vc)
2444                    && vc->vc_mode == KD_TEXT) {
2445                 fbcon_clear_margins(vc, 0);
2446                 update_screen(vc);
2447         }
2448
2449         if (old_data && (--REFCOUNT(old_data) == 0))
2450                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2451         return 0;
2452 }
2453
2454 /*
2455  *  User asked to set font; we are guaranteed that
2456  *      a) width and height are in range 1..32
2457  *      b) charcount does not exceed 512
2458  *  but lets not assume that, since someone might someday want to use larger
2459  *  fonts. And charcount of 512 is small for unicode support.
2460  *
2461  *  However, user space gives the font in 32 rows , regardless of
2462  *  actual font height. So a new API is needed if support for larger fonts
2463  *  is ever implemented.
2464  */
2465
2466 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2467                           unsigned int flags)
2468 {
2469         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2470         unsigned charcount = font->charcount;
2471         int w = font->width;
2472         int h = font->height;
2473         int size;
2474         int i, csum;
2475         u8 *new_data, *data = font->data;
2476         int pitch = PITCH(font->width);
2477
2478         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2479          * If not this check should be changed to charcount < 256 */
2480         if (charcount != 256 && charcount != 512)
2481                 return -EINVAL;
2482
2483         /* Make sure drawing engine can handle the font */
2484         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2485             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2486                 return -EINVAL;
2487
2488         /* Make sure driver can handle the font length */
2489         if (fbcon_invalid_charcount(info, charcount))
2490                 return -EINVAL;
2491
2492         size = CALC_FONTSZ(h, pitch, charcount);
2493
2494         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2495
2496         if (!new_data)
2497                 return -ENOMEM;
2498
2499         memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2500
2501         new_data += FONT_EXTRA_WORDS * sizeof(int);
2502         FNTSIZE(new_data) = size;
2503         REFCOUNT(new_data) = 0; /* usage counter */
2504         for (i=0; i< charcount; i++) {
2505                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2506         }
2507
2508         /* Since linux has a nice crc32 function use it for counting font
2509          * checksums. */
2510         csum = crc32(0, new_data, size);
2511
2512         FNTSUM(new_data) = csum;
2513         /* Check if the same font is on some other console already */
2514         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2515                 struct vc_data *tmp = vc_cons[i].d;
2516
2517                 if (fb_display[i].userfont &&
2518                     fb_display[i].fontdata &&
2519                     FNTSUM(fb_display[i].fontdata) == csum &&
2520                     FNTSIZE(fb_display[i].fontdata) == size &&
2521                     tmp->vc_font.width == w &&
2522                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2523                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2524                         new_data = (u8 *)fb_display[i].fontdata;
2525                         break;
2526                 }
2527         }
2528         return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2529 }
2530
2531 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2532 {
2533         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2534         const struct font_desc *f;
2535
2536         if (!name)
2537                 f = get_default_font(info->var.xres, info->var.yres,
2538                                      info->pixmap.blit_x, info->pixmap.blit_y);
2539         else if (!(f = find_font(name)))
2540                 return -ENOENT;
2541
2542         font->width = f->width;
2543         font->height = f->height;
2544         return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2545 }
2546
2547 static u16 palette_red[16];
2548 static u16 palette_green[16];
2549 static u16 palette_blue[16];
2550
2551 static struct fb_cmap palette_cmap = {
2552         0, 16, palette_red, palette_green, palette_blue, NULL
2553 };
2554
2555 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2556 {
2557         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2558         int i, j, k, depth;
2559         u8 val;
2560
2561         if (fbcon_is_inactive(vc, info))
2562                 return;
2563
2564         if (!con_is_visible(vc))
2565                 return;
2566
2567         depth = fb_get_color_depth(&info->var, &info->fix);
2568         if (depth > 3) {
2569                 for (i = j = 0; i < 16; i++) {
2570                         k = table[i];
2571                         val = vc->vc_palette[j++];
2572                         palette_red[k] = (val << 8) | val;
2573                         val = vc->vc_palette[j++];
2574                         palette_green[k] = (val << 8) | val;
2575                         val = vc->vc_palette[j++];
2576                         palette_blue[k] = (val << 8) | val;
2577                 }
2578                 palette_cmap.len = 16;
2579                 palette_cmap.start = 0;
2580         /*
2581          * If framebuffer is capable of less than 16 colors,
2582          * use default palette of fbcon.
2583          */
2584         } else
2585                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2586
2587         fb_set_cmap(&palette_cmap, info);
2588 }
2589
2590 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2591 {
2592         return (u16 *) (vc->vc_origin + offset);
2593 }
2594
2595 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2596                                  int *px, int *py)
2597 {
2598         unsigned long ret;
2599         int x, y;
2600
2601         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2602                 unsigned long offset = (pos - vc->vc_origin) / 2;
2603
2604                 x = offset % vc->vc_cols;
2605                 y = offset / vc->vc_cols;
2606                 ret = pos + (vc->vc_cols - x) * 2;
2607         } else {
2608                 /* Should not happen */
2609                 x = y = 0;
2610                 ret = vc->vc_origin;
2611         }
2612         if (px)
2613                 *px = x;
2614         if (py)
2615                 *py = y;
2616         return ret;
2617 }
2618
2619 /* As we might be inside of softback, we may work with non-contiguous buffer,
2620    that's why we have to use a separate routine. */
2621 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2622 {
2623         while (cnt--) {
2624                 u16 a = scr_readw(p);
2625                 if (!vc->vc_can_do_color)
2626                         a ^= 0x0800;
2627                 else if (vc->vc_hi_font_mask == 0x100)
2628                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2629                             (((a) & 0x0e00) << 4);
2630                 else
2631                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2632                             (((a) & 0x0700) << 4);
2633                 scr_writew(a, p++);
2634         }
2635 }
2636
2637 void fbcon_suspended(struct fb_info *info)
2638 {
2639         struct vc_data *vc = NULL;
2640         struct fbcon_ops *ops = info->fbcon_par;
2641
2642         if (!ops || ops->currcon < 0)
2643                 return;
2644         vc = vc_cons[ops->currcon].d;
2645
2646         /* Clear cursor, restore saved data */
2647         fbcon_cursor(vc, CM_ERASE);
2648 }
2649
2650 void fbcon_resumed(struct fb_info *info)
2651 {
2652         struct vc_data *vc;
2653         struct fbcon_ops *ops = info->fbcon_par;
2654
2655         if (!ops || ops->currcon < 0)
2656                 return;
2657         vc = vc_cons[ops->currcon].d;
2658
2659         update_screen(vc);
2660 }
2661
2662 static void fbcon_modechanged(struct fb_info *info)
2663 {
2664         struct fbcon_ops *ops = info->fbcon_par;
2665         struct vc_data *vc;
2666         struct fbcon_display *p;
2667         int rows, cols;
2668
2669         if (!ops || ops->currcon < 0)
2670                 return;
2671         vc = vc_cons[ops->currcon].d;
2672         if (vc->vc_mode != KD_TEXT ||
2673             registered_fb[con2fb_map[ops->currcon]] != info)
2674                 return;
2675
2676         p = &fb_display[vc->vc_num];
2677         set_blitting_type(vc, info);
2678
2679         if (con_is_visible(vc)) {
2680                 var_to_display(p, &info->var, info);
2681                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2682                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2683                 cols /= vc->vc_font.width;
2684                 rows /= vc->vc_font.height;
2685                 vc_resize(vc, cols, rows);
2686                 updatescrollmode(p, info, vc);
2687                 scrollback_max = 0;
2688                 scrollback_current = 0;
2689
2690                 if (!fbcon_is_inactive(vc, info)) {
2691                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2692                     ops->update_start(info);
2693                 }
2694
2695                 fbcon_set_palette(vc, color_table);
2696                 update_screen(vc);
2697         }
2698 }
2699
2700 static void fbcon_set_all_vcs(struct fb_info *info)
2701 {
2702         struct fbcon_ops *ops = info->fbcon_par;
2703         struct vc_data *vc;
2704         struct fbcon_display *p;
2705         int i, rows, cols, fg = -1;
2706
2707         if (!ops || ops->currcon < 0)
2708                 return;
2709
2710         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2711                 vc = vc_cons[i].d;
2712                 if (!vc || vc->vc_mode != KD_TEXT ||
2713                     registered_fb[con2fb_map[i]] != info)
2714                         continue;
2715
2716                 if (con_is_visible(vc)) {
2717                         fg = i;
2718                         continue;
2719                 }
2720
2721                 p = &fb_display[vc->vc_num];
2722                 set_blitting_type(vc, info);
2723                 var_to_display(p, &info->var, info);
2724                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2725                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2726                 cols /= vc->vc_font.width;
2727                 rows /= vc->vc_font.height;
2728                 vc_resize(vc, cols, rows);
2729         }
2730
2731         if (fg != -1)
2732                 fbcon_modechanged(info);
2733 }
2734
2735
2736 void fbcon_update_vcs(struct fb_info *info, bool all)
2737 {
2738         if (all)
2739                 fbcon_set_all_vcs(info);
2740         else
2741                 fbcon_modechanged(info);
2742 }
2743 EXPORT_SYMBOL(fbcon_update_vcs);
2744
2745 int fbcon_mode_deleted(struct fb_info *info,
2746                        struct fb_videomode *mode)
2747 {
2748         struct fb_info *fb_info;
2749         struct fbcon_display *p;
2750         int i, j, found = 0;
2751
2752         /* before deletion, ensure that mode is not in use */
2753         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2754                 j = con2fb_map[i];
2755                 if (j == -1)
2756                         continue;
2757                 fb_info = registered_fb[j];
2758                 if (fb_info != info)
2759                         continue;
2760                 p = &fb_display[i];
2761                 if (!p || !p->mode)
2762                         continue;
2763                 if (fb_mode_is_equal(p->mode, mode)) {
2764                         found = 1;
2765                         break;
2766                 }
2767         }
2768         return found;
2769 }
2770
2771 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2772 static void fbcon_unbind(void)
2773 {
2774         int ret;
2775
2776         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2777                                 fbcon_is_default);
2778
2779         if (!ret)
2780                 fbcon_has_console_bind = 0;
2781 }
2782 #else
2783 static inline void fbcon_unbind(void) {}
2784 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2785
2786 /* called with console_lock held */
2787 void fbcon_fb_unbind(struct fb_info *info)
2788 {
2789         int i, new_idx = -1, ret = 0;
2790         int idx = info->node;
2791
2792         WARN_CONSOLE_UNLOCKED();
2793
2794         if (!fbcon_has_console_bind)
2795                 return;
2796
2797         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2798                 if (con2fb_map[i] != idx &&
2799                     con2fb_map[i] != -1) {
2800                         new_idx = con2fb_map[i];
2801                         break;
2802                 }
2803         }
2804
2805         if (new_idx != -1) {
2806                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2807                         if (con2fb_map[i] == idx)
2808                                 set_con2fb_map(i, new_idx, 0);
2809                 }
2810         } else {
2811                 struct fb_info *info = registered_fb[idx];
2812
2813                 /* This is sort of like set_con2fb_map, except it maps
2814                  * the consoles to no device and then releases the
2815                  * oldinfo to free memory and cancel the cursor blink
2816                  * timer. I can imagine this just becoming part of
2817                  * set_con2fb_map where new_idx is -1
2818                  */
2819                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2820                         if (con2fb_map[i] == idx) {
2821                                 con2fb_map[i] = -1;
2822                                 if (!search_fb_in_map(idx)) {
2823                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
2824                                                                      info, NULL, i,
2825                                                                      idx, 0);
2826                                         if (ret) {
2827                                                 con2fb_map[i] = idx;
2828                                                 return;
2829                                         }
2830                                 }
2831                         }
2832                 }
2833                 fbcon_unbind();
2834         }
2835 }
2836
2837 /* called with console_lock held */
2838 void fbcon_fb_unregistered(struct fb_info *info)
2839 {
2840         int i, idx;
2841
2842         WARN_CONSOLE_UNLOCKED();
2843
2844         if (deferred_takeover)
2845                 return;
2846
2847         idx = info->node;
2848         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2849                 if (con2fb_map[i] == idx)
2850                         con2fb_map[i] = -1;
2851         }
2852
2853         if (idx == info_idx) {
2854                 info_idx = -1;
2855
2856                 for_each_registered_fb(i) {
2857                         info_idx = i;
2858                         break;
2859                 }
2860         }
2861
2862         if (info_idx != -1) {
2863                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2864                         if (con2fb_map[i] == -1)
2865                                 con2fb_map[i] = info_idx;
2866                 }
2867         }
2868
2869         if (primary_device == idx)
2870                 primary_device = -1;
2871
2872         if (!num_registered_fb)
2873                 do_unregister_con_driver(&fb_con);
2874 }
2875
2876 void fbcon_remap_all(struct fb_info *info)
2877 {
2878         int i, idx = info->node;
2879
2880         console_lock();
2881         if (deferred_takeover) {
2882                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2883                         con2fb_map_boot[i] = idx;
2884                 fbcon_map_override();
2885                 console_unlock();
2886                 return;
2887         }
2888
2889         for (i = first_fb_vc; i <= last_fb_vc; i++)
2890                 set_con2fb_map(i, idx, 0);
2891
2892         if (con_is_bound(&fb_con)) {
2893                 printk(KERN_INFO "fbcon: Remapping primary device, "
2894                        "fb%i, to tty %i-%i\n", idx,
2895                        first_fb_vc + 1, last_fb_vc + 1);
2896                 info_idx = idx;
2897         }
2898         console_unlock();
2899 }
2900
2901 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
2902 static void fbcon_select_primary(struct fb_info *info)
2903 {
2904         if (!map_override && primary_device == -1 &&
2905             fb_is_primary_device(info)) {
2906                 int i;
2907
2908                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2909                        info->fix.id, info->node);
2910                 primary_device = info->node;
2911
2912                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2913                         con2fb_map_boot[i] = primary_device;
2914
2915                 if (con_is_bound(&fb_con)) {
2916                         printk(KERN_INFO "fbcon: Remapping primary device, "
2917                                "fb%i, to tty %i-%i\n", info->node,
2918                                first_fb_vc + 1, last_fb_vc + 1);
2919                         info_idx = primary_device;
2920                 }
2921         }
2922
2923 }
2924 #else
2925 static inline void fbcon_select_primary(struct fb_info *info)
2926 {
2927         return;
2928 }
2929 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2930
2931 /* called with console_lock held */
2932 int fbcon_fb_registered(struct fb_info *info)
2933 {
2934         int ret = 0, i, idx;
2935
2936         WARN_CONSOLE_UNLOCKED();
2937
2938         idx = info->node;
2939         fbcon_select_primary(info);
2940
2941         if (deferred_takeover) {
2942                 pr_info("fbcon: Deferring console take-over\n");
2943                 return 0;
2944         }
2945
2946         if (info_idx == -1) {
2947                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2948                         if (con2fb_map_boot[i] == idx) {
2949                                 info_idx = idx;
2950                                 break;
2951                         }
2952                 }
2953
2954                 if (info_idx != -1)
2955                         ret = do_fbcon_takeover(1);
2956         } else {
2957                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2958                         if (con2fb_map_boot[i] == idx)
2959                                 set_con2fb_map(i, idx, 0);
2960                 }
2961         }
2962
2963         return ret;
2964 }
2965
2966 void fbcon_fb_blanked(struct fb_info *info, int blank)
2967 {
2968         struct fbcon_ops *ops = info->fbcon_par;
2969         struct vc_data *vc;
2970
2971         if (!ops || ops->currcon < 0)
2972                 return;
2973
2974         vc = vc_cons[ops->currcon].d;
2975         if (vc->vc_mode != KD_TEXT ||
2976                         registered_fb[con2fb_map[ops->currcon]] != info)
2977                 return;
2978
2979         if (con_is_visible(vc)) {
2980                 if (blank)
2981                         do_blank_screen(0);
2982                 else
2983                         do_unblank_screen(0);
2984         }
2985         ops->blank_state = blank;
2986 }
2987
2988 void fbcon_new_modelist(struct fb_info *info)
2989 {
2990         int i;
2991         struct vc_data *vc;
2992         struct fb_var_screeninfo var;
2993         const struct fb_videomode *mode;
2994
2995         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2996                 if (registered_fb[con2fb_map[i]] != info)
2997                         continue;
2998                 if (!fb_display[i].mode)
2999                         continue;
3000                 vc = vc_cons[i].d;
3001                 display_to_var(&var, &fb_display[i]);
3002                 mode = fb_find_nearest_mode(fb_display[i].mode,
3003                                             &info->modelist);
3004                 fb_videomode_to_var(&var, mode);
3005                 fbcon_set_disp(info, &var, vc->vc_num);
3006         }
3007 }
3008
3009 void fbcon_get_requirement(struct fb_info *info,
3010                            struct fb_blit_caps *caps)
3011 {
3012         struct vc_data *vc;
3013
3014         if (caps->flags) {
3015                 int i, charcnt;
3016
3017                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3018                         vc = vc_cons[i].d;
3019                         if (vc && vc->vc_mode == KD_TEXT &&
3020                             info->node == con2fb_map[i]) {
3021                                 caps->x |= 1 << (vc->vc_font.width - 1);
3022                                 caps->y |= 1 << (vc->vc_font.height - 1);
3023                                 charcnt = vc->vc_font.charcount;
3024                                 if (caps->len < charcnt)
3025                                         caps->len = charcnt;
3026                         }
3027                 }
3028         } else {
3029                 vc = vc_cons[fg_console].d;
3030
3031                 if (vc && vc->vc_mode == KD_TEXT &&
3032                     info->node == con2fb_map[fg_console]) {
3033                         caps->x = 1 << (vc->vc_font.width - 1);
3034                         caps->y = 1 << (vc->vc_font.height - 1);
3035                         caps->len = vc->vc_font.charcount;
3036                 }
3037         }
3038 }
3039
3040 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3041 {
3042         struct fb_con2fbmap con2fb;
3043         int ret;
3044
3045         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3046                 return -EFAULT;
3047         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3048                 return -EINVAL;
3049         if (con2fb.framebuffer >= FB_MAX)
3050                 return -EINVAL;
3051         if (!registered_fb[con2fb.framebuffer])
3052                 request_module("fb%d", con2fb.framebuffer);
3053         if (!registered_fb[con2fb.framebuffer]) {
3054                 return -EINVAL;
3055         }
3056
3057         console_lock();
3058         ret = set_con2fb_map(con2fb.console - 1,
3059                              con2fb.framebuffer, 1);
3060         console_unlock();
3061
3062         return ret;
3063 }
3064
3065 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3066 {
3067         struct fb_con2fbmap con2fb;
3068
3069         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3070                 return -EFAULT;
3071         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3072                 return -EINVAL;
3073
3074         console_lock();
3075         con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3076         console_unlock();
3077
3078         return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3079 }
3080
3081 /*
3082  *  The console `switch' structure for the frame buffer based console
3083  */
3084
3085 static const struct consw fb_con = {
3086         .owner                  = THIS_MODULE,
3087         .con_startup            = fbcon_startup,
3088         .con_init               = fbcon_init,
3089         .con_deinit             = fbcon_deinit,
3090         .con_clear              = fbcon_clear,
3091         .con_putc               = fbcon_putc,
3092         .con_putcs              = fbcon_putcs,
3093         .con_cursor             = fbcon_cursor,
3094         .con_scroll             = fbcon_scroll,
3095         .con_switch             = fbcon_switch,
3096         .con_blank              = fbcon_blank,
3097         .con_font_set           = fbcon_set_font,
3098         .con_font_get           = fbcon_get_font,
3099         .con_font_default       = fbcon_set_def_font,
3100         .con_set_palette        = fbcon_set_palette,
3101         .con_invert_region      = fbcon_invert_region,
3102         .con_screen_pos         = fbcon_screen_pos,
3103         .con_getxy              = fbcon_getxy,
3104         .con_resize             = fbcon_resize,
3105         .con_debug_enter        = fbcon_debug_enter,
3106         .con_debug_leave        = fbcon_debug_leave,
3107 };
3108
3109 static ssize_t store_rotate(struct device *device,
3110                             struct device_attribute *attr, const char *buf,
3111                             size_t count)
3112 {
3113         struct fb_info *info;
3114         int rotate, idx;
3115         char **last = NULL;
3116
3117         console_lock();
3118         idx = con2fb_map[fg_console];
3119
3120         if (idx == -1 || registered_fb[idx] == NULL)
3121                 goto err;
3122
3123         info = registered_fb[idx];
3124         rotate = simple_strtoul(buf, last, 0);
3125         fbcon_rotate(info, rotate);
3126 err:
3127         console_unlock();
3128         return count;
3129 }
3130
3131 static ssize_t store_rotate_all(struct device *device,
3132                                 struct device_attribute *attr,const char *buf,
3133                                 size_t count)
3134 {
3135         struct fb_info *info;
3136         int rotate, idx;
3137         char **last = NULL;
3138
3139         console_lock();
3140         idx = con2fb_map[fg_console];
3141
3142         if (idx == -1 || registered_fb[idx] == NULL)
3143                 goto err;
3144
3145         info = registered_fb[idx];
3146         rotate = simple_strtoul(buf, last, 0);
3147         fbcon_rotate_all(info, rotate);
3148 err:
3149         console_unlock();
3150         return count;
3151 }
3152
3153 static ssize_t show_rotate(struct device *device,
3154                            struct device_attribute *attr,char *buf)
3155 {
3156         struct fb_info *info;
3157         int rotate = 0, idx;
3158
3159         console_lock();
3160         idx = con2fb_map[fg_console];
3161
3162         if (idx == -1 || registered_fb[idx] == NULL)
3163                 goto err;
3164
3165         info = registered_fb[idx];
3166         rotate = fbcon_get_rotate(info);
3167 err:
3168         console_unlock();
3169         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3170 }
3171
3172 static ssize_t show_cursor_blink(struct device *device,
3173                                  struct device_attribute *attr, char *buf)
3174 {
3175         struct fb_info *info;
3176         struct fbcon_ops *ops;
3177         int idx, blink = -1;
3178
3179         console_lock();
3180         idx = con2fb_map[fg_console];
3181
3182         if (idx == -1 || registered_fb[idx] == NULL)
3183                 goto err;
3184
3185         info = registered_fb[idx];
3186         ops = info->fbcon_par;
3187
3188         if (!ops)
3189                 goto err;
3190
3191         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3192 err:
3193         console_unlock();
3194         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3195 }
3196
3197 static ssize_t store_cursor_blink(struct device *device,
3198                                   struct device_attribute *attr,
3199                                   const char *buf, size_t count)
3200 {
3201         struct fb_info *info;
3202         int blink, idx;
3203         char **last = NULL;
3204
3205         console_lock();
3206         idx = con2fb_map[fg_console];
3207
3208         if (idx == -1 || registered_fb[idx] == NULL)
3209                 goto err;
3210
3211         info = registered_fb[idx];
3212
3213         if (!info->fbcon_par)
3214                 goto err;
3215
3216         blink = simple_strtoul(buf, last, 0);
3217
3218         if (blink) {
3219                 fbcon_cursor_noblink = 0;
3220                 fbcon_add_cursor_timer(info);
3221         } else {
3222                 fbcon_cursor_noblink = 1;
3223                 fbcon_del_cursor_timer(info);
3224         }
3225
3226 err:
3227         console_unlock();
3228         return count;
3229 }
3230
3231 static struct device_attribute device_attrs[] = {
3232         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3233         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3234         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3235                store_cursor_blink),
3236 };
3237
3238 static int fbcon_init_device(void)
3239 {
3240         int i, error = 0;
3241
3242         fbcon_has_sysfs = 1;
3243
3244         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3245                 error = device_create_file(fbcon_device, &device_attrs[i]);
3246
3247                 if (error)
3248                         break;
3249         }
3250
3251         if (error) {
3252                 while (--i >= 0)
3253                         device_remove_file(fbcon_device, &device_attrs[i]);
3254
3255                 fbcon_has_sysfs = 0;
3256         }
3257
3258         return 0;
3259 }
3260
3261 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3262 static void fbcon_register_existing_fbs(struct work_struct *work)
3263 {
3264         int i;
3265
3266         console_lock();
3267
3268         for_each_registered_fb(i)
3269                 fbcon_fb_registered(registered_fb[i]);
3270
3271         console_unlock();
3272 }
3273
3274 static struct notifier_block fbcon_output_nb;
3275 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3276
3277 static int fbcon_output_notifier(struct notifier_block *nb,
3278                                  unsigned long action, void *data)
3279 {
3280         WARN_CONSOLE_UNLOCKED();
3281
3282         pr_info("fbcon: Taking over console\n");
3283
3284         dummycon_unregister_output_notifier(&fbcon_output_nb);
3285         deferred_takeover = false;
3286         logo_shown = FBCON_LOGO_DONTSHOW;
3287
3288         /* We may get called in atomic context */
3289         schedule_work(&fbcon_deferred_takeover_work);
3290
3291         return NOTIFY_OK;
3292 }
3293 #endif
3294
3295 static void fbcon_start(void)
3296 {
3297         WARN_CONSOLE_UNLOCKED();
3298
3299 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3300         if (conswitchp != &dummy_con)
3301                 deferred_takeover = false;
3302
3303         if (deferred_takeover) {
3304                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3305                 dummycon_register_output_notifier(&fbcon_output_nb);
3306                 return;
3307         }
3308 #endif
3309
3310         if (num_registered_fb) {
3311                 int i;
3312
3313                 for_each_registered_fb(i) {
3314                         info_idx = i;
3315                         break;
3316                 }
3317
3318                 do_fbcon_takeover(0);
3319         }
3320 }
3321
3322 static void fbcon_exit(void)
3323 {
3324         struct fb_info *info;
3325         int i, j, mapped;
3326
3327 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3328         if (deferred_takeover) {
3329                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3330                 deferred_takeover = false;
3331         }
3332 #endif
3333
3334         for_each_registered_fb(i) {
3335                 int pending = 0;
3336
3337                 mapped = 0;
3338                 info = registered_fb[i];
3339
3340                 if (info->queue.func)
3341                         pending = cancel_work_sync(&info->queue);
3342                 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no"));
3343
3344                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3345                         if (con2fb_map[j] == i) {
3346                                 mapped = 1;
3347                                 con2fb_map[j] = -1;
3348                         }
3349                 }
3350
3351                 if (mapped) {
3352                         if (info->fbops->fb_release)
3353                                 info->fbops->fb_release(info, 0);
3354                         module_put(info->fbops->owner);
3355
3356                         if (info->fbcon_par) {
3357                                 struct fbcon_ops *ops = info->fbcon_par;
3358
3359                                 fbcon_del_cursor_timer(info);
3360                                 kfree(ops->cursor_src);
3361                                 kfree(ops->cursor_state.mask);
3362                                 kfree(info->fbcon_par);
3363                                 info->fbcon_par = NULL;
3364                         }
3365
3366                         if (info->queue.func == fb_flashcursor)
3367                                 info->queue.func = NULL;
3368                 }
3369         }
3370 }
3371
3372 void __init fb_console_init(void)
3373 {
3374         int i;
3375
3376         console_lock();
3377         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3378                                      "fbcon");
3379
3380         if (IS_ERR(fbcon_device)) {
3381                 printk(KERN_WARNING "Unable to create device "
3382                        "for fbcon; errno = %ld\n",
3383                        PTR_ERR(fbcon_device));
3384                 fbcon_device = NULL;
3385         } else
3386                 fbcon_init_device();
3387
3388         for (i = 0; i < MAX_NR_CONSOLES; i++)
3389                 con2fb_map[i] = -1;
3390
3391         fbcon_start();
3392         console_unlock();
3393 }
3394
3395 #ifdef MODULE
3396
3397 static void __exit fbcon_deinit_device(void)
3398 {
3399         int i;
3400
3401         if (fbcon_has_sysfs) {
3402                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3403                         device_remove_file(fbcon_device, &device_attrs[i]);
3404
3405                 fbcon_has_sysfs = 0;
3406         }
3407 }
3408
3409 void __exit fb_console_exit(void)
3410 {
3411         console_lock();
3412         fbcon_deinit_device();
3413         device_destroy(fb_class, MKDEV(0, 0));
3414         fbcon_exit();
3415         do_unregister_con_driver(&fb_con);
3416         console_unlock();
3417 }
3418 #endif