drivers/video/fbdev/core/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #include <linux/module.h>
  60 #include <linux/types.h>
  61 #include <linux/fs.h>
  62 #include <linux/kernel.h>
  63 #include <linux/delay.h>        /* MSch: for IRQ probe */
  64 #include <linux/console.h>
  65 #include <linux/string.h>
  66 #include <linux/kd.h>
  67 #include <linux/slab.h>
  68 #include <linux/fb.h>
  69 #include <linux/fbcon.h>
  70 #include <linux/vt_kern.h>
  71 #include <linux/selection.h>
  72 #include <linux/font.h>
  73 #include <linux/smp.h>
  74 #include <linux/init.h>
  75 #include <linux/interrupt.h>
  76 #include <linux/crc32.h> /* For counting font checksums */
  77 #include <linux/uaccess.h>
  78 #include <asm/fb.h>
  79 #include <asm/irq.h>
  80
  81 #include "fbcon.h"
  82
  83 /*
  84  * FIXME: Locking
  85  *
  86  * - fbcon state itself is protected by the console_lock, and the code does a
  87  *   pretty good job at making sure that lock is held everywhere it's needed.
  88  *
  89  * - access to the registered_fb array is entirely unprotected. This should use
  90  *   proper object lifetime handling, i.e. get/put_fb_info. This also means
  91  *   switching from indices to proper pointers for fb_info everywhere.
  92  *
  93  * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
  94  *   means concurrent access to the same fbdev from both fbcon and userspace
  95  *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
  96  *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
  97  *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
  98  *   fbmem.c cannot use locking asserts, and there's lots of callers which get
  99  *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
 100  */
 101
 102 enum {
 103         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 104         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 105         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 106 };
 107
 108 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
 109
 110 static signed char con2fb_map[MAX_NR_CONSOLES];
 111 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 112
 113 static int logo_lines;
 114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 115    enums.  */
 116 static int logo_shown = FBCON_LOGO_CANSHOW;
 117 /* console mappings */
 118 static int first_fb_vc;
 119 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 120 static int fbcon_is_default = 1;
 121 static int primary_device = -1;
 122 static int fbcon_has_console_bind;
 123
 124 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 125 static int map_override;
 126
 127 static inline void fbcon_map_override(void)
 128 {
 129         map_override = 1;
 130 }
 131 #else
 132 static inline void fbcon_map_override(void)
 133 {
 134 }
 135 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 136
 137 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 138 static bool deferred_takeover = true;
 139 #else
 140 #define deferred_takeover false
 141 #endif
 142
 143 /* font data */
 144 static char fontname[40];
 145
 146 /* current fb_info */
 147 static int info_idx = -1;
 148
 149 /* console rotation */
 150 static int initial_rotation = -1;
 151 static int fbcon_has_sysfs;
 152 static int margin_color;
 153
 154 static const struct consw fb_con;
 155
 156 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 157
 158 static int fbcon_cursor_noblink;
 159
 160 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 161
 162 /*
 163  *  Interface used by the world
 164  */
 165
 166 static const char *fbcon_startup(void);
 167 static void fbcon_init(struct vc_data *vc, int init);
 168 static void fbcon_deinit(struct vc_data *vc);
 169 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 170                         int width);
 171 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 172 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 173                         int count, int ypos, int xpos);
 174 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 175 static void fbcon_cursor(struct vc_data *vc, int mode);
 176 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 177                         int height, int width);
 178 static int fbcon_switch(struct vc_data *vc);
 179 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 180 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
 181
 182 /*
 183  *  Internal routines
 184  */
 185 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 186 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 187 static __inline__ void ypan_up(struct vc_data *vc, int count);
 188 static __inline__ void ypan_down(struct vc_data *vc, int count);
 189 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 190                             int dy, int dx, int height, int width, u_int y_break);
 191 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 192                            int unit);
 193 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 194                               int line, int count, int dy);
 195 static void fbcon_modechanged(struct fb_info *info);
 196 static void fbcon_set_all_vcs(struct fb_info *info);
 197 static void fbcon_start(void);
 198 static void fbcon_exit(void);
 199 static struct device *fbcon_device;
 200
 201 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 202 static inline void fbcon_set_rotation(struct fb_info *info)
 203 {
 204         struct fbcon_ops *ops = info->fbcon_par;
 205
 206         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 207             ops->p->con_rotate < 4)
 208                 ops->rotate = ops->p->con_rotate;
 209         else
 210                 ops->rotate = 0;
 211 }
 212
 213 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 214 {
 215         struct fbcon_ops *ops= info->fbcon_par;
 216         struct fb_info *fb_info;
 217
 218         if (!ops || ops->currcon == -1)
 219                 return;
 220
 221         fb_info = registered_fb[con2fb_map[ops->currcon]];
 222
 223         if (info == fb_info) {
 224                 struct fbcon_display *p = &fb_display[ops->currcon];
 225
 226                 if (rotate < 4)
 227                         p->con_rotate = rotate;
 228                 else
 229                         p->con_rotate = 0;
 230
 231                 fbcon_modechanged(info);
 232         }
 233 }
 234
 235 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 236 {
 237         struct fbcon_ops *ops = info->fbcon_par;
 238         struct vc_data *vc;
 239         struct fbcon_display *p;
 240         int i;
 241
 242         if (!ops || ops->currcon < 0 || rotate > 3)
 243                 return;
 244
 245         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 246                 vc = vc_cons[i].d;
 247                 if (!vc || vc->vc_mode != KD_TEXT ||
 248                     registered_fb[con2fb_map[i]] != info)
 249                         continue;
 250
 251                 p = &fb_display[vc->vc_num];
 252                 p->con_rotate = rotate;
 253         }
 254
 255         fbcon_set_all_vcs(info);
 256 }
 257 #else
 258 static inline void fbcon_set_rotation(struct fb_info *info)
 259 {
 260         struct fbcon_ops *ops = info->fbcon_par;
 261
 262         ops->rotate = FB_ROTATE_UR;
 263 }
 264
 265 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 266 {
 267         return;
 268 }
 269
 270 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 271 {
 272         return;
 273 }
 274 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 275
 276 static int fbcon_get_rotate(struct fb_info *info)
 277 {
 278         struct fbcon_ops *ops = info->fbcon_par;
 279
 280         return (ops) ? ops->rotate : 0;
 281 }
 282
 283 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 284 {
 285         struct fbcon_ops *ops = info->fbcon_par;
 286
 287         return (info->state != FBINFO_STATE_RUNNING ||
 288                 vc->vc_mode != KD_TEXT || ops->graphics);
 289 }
 290
 291 static int get_color(struct vc_data *vc, struct fb_info *info,
 292               u16 c, int is_fg)
 293 {
 294         int depth = fb_get_color_depth(&info->var, &info->fix);
 295         int color = 0;
 296
 297         if (console_blanked) {
 298                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 299
 300                 c = vc->vc_video_erase_char & charmask;
 301         }
 302
 303         if (depth != 1)
 304                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 305                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 306
 307         switch (depth) {
 308         case 1:
 309         {
 310                 int col = mono_col(info);
 311                 /* 0 or 1 */
 312                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 313                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 314
 315                 if (console_blanked)
 316                         fg = bg;
 317
 318                 color = (is_fg) ? fg : bg;
 319                 break;
 320         }
 321         case 2:
 322                 /*
 323                  * Scale down 16-colors to 4 colors. Default 4-color palette
 324                  * is grayscale. However, simply dividing the values by 4
 325                  * will not work, as colors 1, 2 and 3 will be scaled-down
 326                  * to zero rendering them invisible.  So empirically convert
 327                  * colors to a sane 4-level grayscale.
 328                  */
 329                 switch (color) {
 330                 case 0:
 331                         color = 0; /* black */
 332                         break;
 333                 case 1 ... 6:
 334                         color = 2; /* white */
 335                         break;
 336                 case 7 ... 8:
 337                         color = 1; /* gray */
 338                         break;
 339                 default:
 340                         color = 3; /* intense white */
 341                         break;
 342                 }
 343                 break;
 344         case 3:
 345                 /*
 346                  * Last 8 entries of default 16-color palette is a more intense
 347                  * version of the first 8 (i.e., same chrominance, different
 348                  * luminance).
 349                  */
 350                 color &= 7;
 351                 break;
 352         }
 353
 354
 355         return color;
 356 }
 357
 358 static void fb_flashcursor(struct work_struct *work)
 359 {
 360         struct fb_info *info = container_of(work, struct fb_info, queue);
 361         struct fbcon_ops *ops = info->fbcon_par;
 362         struct vc_data *vc = NULL;
 363         int c;
 364         int mode;
 365         int ret;
 366
 367         /* FIXME: we should sort out the unbind locking instead */
 368         /* instead we just fail to flash the cursor if we can't get
 369          * the lock instead of blocking fbcon deinit */
 370         ret = console_trylock();
 371         if (ret == 0)
 372                 return;
 373
 374         if (ops && ops->currcon != -1)
 375                 vc = vc_cons[ops->currcon].d;
 376
 377         if (!vc || !con_is_visible(vc) ||
 378             registered_fb[con2fb_map[vc->vc_num]] != info ||
 379             vc->vc_deccm != 1) {
 380                 console_unlock();
 381                 return;
 382         }
 383
 384         c = scr_readw((u16 *) vc->vc_pos);
 385         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 386                 CM_ERASE : CM_DRAW;
 387         ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
 388                     get_color(vc, info, c, 0));
 389         console_unlock();
 390 }
 391
 392 static void cursor_timer_handler(struct timer_list *t)
 393 {
 394         struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
 395         struct fb_info *info = ops->info;
 396
 397         queue_work(system_power_efficient_wq, &info->queue);
 398         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 399 }
 400
 401 static void fbcon_add_cursor_timer(struct fb_info *info)
 402 {
 403         struct fbcon_ops *ops = info->fbcon_par;
 404
 405         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 406             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 407             !fbcon_cursor_noblink) {
 408                 if (!info->queue.func)
 409                         INIT_WORK(&info->queue, fb_flashcursor);
 410
 411                 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
 412                 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 413                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 414         }
 415 }
 416
 417 static void fbcon_del_cursor_timer(struct fb_info *info)
 418 {
 419         struct fbcon_ops *ops = info->fbcon_par;
 420
 421         if (info->queue.func == fb_flashcursor &&
 422             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 423                 del_timer_sync(&ops->cursor_timer);
 424                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 425         }
 426 }
 427
 428 #ifndef MODULE
 429 static int __init fb_console_setup(char *this_opt)
 430 {
 431         char *options;
 432         int i, j;
 433
 434         if (!this_opt || !*this_opt)
 435                 return 1;
 436
 437         while ((options = strsep(&this_opt, ",")) != NULL) {
 438                 if (!strncmp(options, "font:", 5)) {
 439                         strlcpy(fontname, options + 5, sizeof(fontname));
 440                         continue;
 441                 }
 442
 443                 if (!strncmp(options, "scrollback:", 11)) {
 444                         pr_warn("Ignoring scrollback size option\n");
 445                         continue;
 446                 }
 447
 448                 if (!strncmp(options, "map:", 4)) {
 449                         options += 4;
 450                         if (*options) {
 451                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 452                                         if (!options[j])
 453                                                 j = 0;
 454                                         con2fb_map_boot[i] =
 455                                                 (options[j++]-'0') % FB_MAX;
 456                                 }
 457
 458                                 fbcon_map_override();
 459                         }
 460                         continue;
 461                 }
 462
 463                 if (!strncmp(options, "vc:", 3)) {
 464                         options += 3;
 465                         if (*options)
 466                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 467                         if (first_fb_vc < 0)
 468                                 first_fb_vc = 0;
 469                         if (*options++ == '-')
 470                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 471                         fbcon_is_default = 0;
 472                         continue;
 473                 }
 474
 475                 if (!strncmp(options, "rotate:", 7)) {
 476                         options += 7;
 477                         if (*options)
 478                                 initial_rotation = simple_strtoul(options, &options, 0);
 479                         if (initial_rotation > 3)
 480                                 initial_rotation = 0;
 481                         continue;
 482                 }
 483
 484                 if (!strncmp(options, "margin:", 7)) {
 485                         options += 7;
 486                         if (*options)
 487                                 margin_color = simple_strtoul(options, &options, 0);
 488                         continue;
 489                 }
 490 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 491                 if (!strcmp(options, "nodefer")) {
 492                         deferred_takeover = false;
 493                         continue;
 494                 }
 495 #endif
 496
 497                 if (!strncmp(options, "logo-pos:", 9)) {
 498                         options += 9;
 499                         if (!strcmp(options, "center"))
 500                                 fb_center_logo = true;
 501                         continue;
 502                 }
 503
 504                 if (!strncmp(options, "logo-count:", 11)) {
 505                         options += 11;
 506                         if (*options)
 507                                 fb_logo_count = simple_strtol(options, &options, 0);
 508                         continue;
 509                 }
 510         }
 511         return 1;
 512 }
 513
 514 __setup("fbcon=", fb_console_setup);
 515 #endif
 516
 517 static int search_fb_in_map(int idx)
 518 {
 519         int i, retval = 0;
 520
 521         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 522                 if (con2fb_map[i] == idx)
 523                         retval = 1;
 524         }
 525         return retval;
 526 }
 527
 528 static int search_for_mapped_con(void)
 529 {
 530         int i, retval = 0;
 531
 532         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 533                 if (con2fb_map[i] != -1)
 534                         retval = 1;
 535         }
 536         return retval;
 537 }
 538
 539 static int do_fbcon_takeover(int show_logo)
 540 {
 541         int err, i;
 542
 543         if (!num_registered_fb)
 544                 return -ENODEV;
 545
 546         if (!show_logo)
 547                 logo_shown = FBCON_LOGO_DONTSHOW;
 548
 549         for (i = first_fb_vc; i <= last_fb_vc; i++)
 550                 con2fb_map[i] = info_idx;
 551
 552         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 553                                 fbcon_is_default);
 554
 555         if (err) {
 556                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 557                         con2fb_map[i] = -1;
 558                 info_idx = -1;
 559         } else {
 560                 fbcon_has_console_bind = 1;
 561         }
 562
 563         return err;
 564 }
 565
 566 #ifdef MODULE
 567 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 568                                int cols, int rows, int new_cols, int new_rows)
 569 {
 570         logo_shown = FBCON_LOGO_DONTSHOW;
 571 }
 572 #else
 573 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 574                                int cols, int rows, int new_cols, int new_rows)
 575 {
 576         /* Need to make room for the logo */
 577         struct fbcon_ops *ops = info->fbcon_par;
 578         int cnt, erase = vc->vc_video_erase_char, step;
 579         unsigned short *save = NULL, *r, *q;
 580         int logo_height;
 581
 582         if (info->fbops->owner) {
 583                 logo_shown = FBCON_LOGO_DONTSHOW;
 584                 return;
 585         }
 586
 587         /*
 588          * remove underline attribute from erase character
 589          * if black and white framebuffer.
 590          */
 591         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 592                 erase &= ~0x400;
 593         logo_height = fb_prepare_logo(info, ops->rotate);
 594         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 595         q = (unsigned short *) (vc->vc_origin +
 596                                 vc->vc_size_row * rows);
 597         step = logo_lines * cols;
 598         for (r = q - logo_lines * cols; r < q; r++)
 599                 if (scr_readw(r) != vc->vc_video_erase_char)
 600                         break;
 601         if (r != q && new_rows >= rows + logo_lines) {
 602                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 603                                GFP_KERNEL);
 604                 if (save) {
 605                         int i = cols < new_cols ? cols : new_cols;
 606                         scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
 607                         r = q - step;
 608                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 609                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 610                         r = q;
 611                 }
 612         }
 613         if (r == q) {
 614                 /* We can scroll screen down */
 615                 r = q - step - cols;
 616                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 617                         scr_memcpyw(r + step, r, vc->vc_size_row);
 618                         r -= cols;
 619                 }
 620                 if (!save) {
 621                         int lines;
 622                         if (vc->state.y + logo_lines >= rows)
 623                                 lines = rows - vc->state.y - 1;
 624                         else
 625                                 lines = logo_lines;
 626                         vc->state.y += lines;
 627                         vc->vc_pos += lines * vc->vc_size_row;
 628                 }
 629         }
 630         scr_memsetw((unsigned short *) vc->vc_origin,
 631                     erase,
 632                     vc->vc_size_row * logo_lines);
 633
 634         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 635                 fbcon_clear_margins(vc, 0);
 636                 update_screen(vc);
 637         }
 638
 639         if (save) {
 640                 q = (unsigned short *) (vc->vc_origin +
 641                                         vc->vc_size_row *
 642                                         rows);
 643                 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
 644                 vc->state.y += logo_lines;
 645                 vc->vc_pos += logo_lines * vc->vc_size_row;
 646                 kfree(save);
 647         }
 648
 649         if (logo_shown == FBCON_LOGO_DONTSHOW)
 650                 return;
 651
 652         if (logo_lines > vc->vc_bottom) {
 653                 logo_shown = FBCON_LOGO_CANSHOW;
 654                 printk(KERN_INFO
 655                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 656         } else {
 657                 logo_shown = FBCON_LOGO_DRAW;
 658                 vc->vc_top = logo_lines;
 659         }
 660 }
 661 #endif /* MODULE */
 662
 663 #ifdef CONFIG_FB_TILEBLITTING
 664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 665 {
 666         struct fbcon_ops *ops = info->fbcon_par;
 667
 668         ops->p = &fb_display[vc->vc_num];
 669
 670         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 671                 fbcon_set_tileops(vc, info);
 672         else {
 673                 fbcon_set_rotation(info);
 674                 fbcon_set_bitops(ops);
 675         }
 676 }
 677
 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 679 {
 680         int err = 0;
 681
 682         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 683             info->tileops->fb_get_tilemax(info) < charcount)
 684                 err = 1;
 685
 686         return err;
 687 }
 688 #else
 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 690 {
 691         struct fbcon_ops *ops = info->fbcon_par;
 692
 693         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 694         ops->p = &fb_display[vc->vc_num];
 695         fbcon_set_rotation(info);
 696         fbcon_set_bitops(ops);
 697 }
 698
 699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 700 {
 701         return 0;
 702 }
 703
 704 #endif /* CONFIG_MISC_TILEBLITTING */
 705
 706
 707 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 708                                   int unit, int oldidx)
 709 {
 710         struct fbcon_ops *ops = NULL;
 711         int err = 0;
 712
 713         if (!try_module_get(info->fbops->owner))
 714                 err = -ENODEV;
 715
 716         if (!err && info->fbops->fb_open &&
 717             info->fbops->fb_open(info, 0))
 718                 err = -ENODEV;
 719
 720         if (!err) {
 721                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 722                 if (!ops)
 723                         err = -ENOMEM;
 724         }
 725
 726         if (!err) {
 727                 ops->cur_blink_jiffies = HZ / 5;
 728                 ops->info = info;
 729                 info->fbcon_par = ops;
 730
 731                 if (vc)
 732                         set_blitting_type(vc, info);
 733         }
 734
 735         if (err) {
 736                 con2fb_map[unit] = oldidx;
 737                 module_put(info->fbops->owner);
 738         }
 739
 740         return err;
 741 }
 742
 743 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 744                                   struct fb_info *newinfo, int unit,
 745                                   int oldidx, int found)
 746 {
 747         struct fbcon_ops *ops = oldinfo->fbcon_par;
 748         int err = 0, ret;
 749
 750         if (oldinfo->fbops->fb_release &&
 751             oldinfo->fbops->fb_release(oldinfo, 0)) {
 752                 con2fb_map[unit] = oldidx;
 753                 if (!found && newinfo->fbops->fb_release)
 754                         newinfo->fbops->fb_release(newinfo, 0);
 755                 if (!found)
 756                         module_put(newinfo->fbops->owner);
 757                 err = -ENODEV;
 758         }
 759
 760         if (!err) {
 761                 fbcon_del_cursor_timer(oldinfo);
 762                 kfree(ops->cursor_state.mask);
 763                 kfree(ops->cursor_data);
 764                 kfree(ops->cursor_src);
 765                 kfree(ops->fontbuffer);
 766                 kfree(oldinfo->fbcon_par);
 767                 oldinfo->fbcon_par = NULL;
 768                 module_put(oldinfo->fbops->owner);
 769                 /*
 770                   If oldinfo and newinfo are driving the same hardware,
 771                   the fb_release() method of oldinfo may attempt to
 772                   restore the hardware state.  This will leave the
 773                   newinfo in an undefined state. Thus, a call to
 774                   fb_set_par() may be needed for the newinfo.
 775                 */
 776                 if (newinfo && newinfo->fbops->fb_set_par) {
 777                         ret = newinfo->fbops->fb_set_par(newinfo);
 778
 779                         if (ret)
 780                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 781                                         "detected unhandled fb_set_par error, "
 782                                         "error code %d\n", ret);
 783                 }
 784         }
 785
 786         return err;
 787 }
 788
 789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 790                                 int unit, int show_logo)
 791 {
 792         struct fbcon_ops *ops = info->fbcon_par;
 793         int ret;
 794
 795         ops->currcon = fg_console;
 796
 797         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 798                 ret = info->fbops->fb_set_par(info);
 799
 800                 if (ret)
 801                         printk(KERN_ERR "con2fb_init_display: detected "
 802                                 "unhandled fb_set_par error, "
 803                                 "error code %d\n", ret);
 804         }
 805
 806         ops->flags |= FBCON_FLAGS_INIT;
 807         ops->graphics = 0;
 808         fbcon_set_disp(info, &info->var, unit);
 809
 810         if (show_logo) {
 811                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 812                 struct fb_info *fg_info =
 813                         registered_fb[con2fb_map[fg_console]];
 814
 815                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 816                                    fg_vc->vc_rows, fg_vc->vc_cols,
 817                                    fg_vc->vc_rows);
 818         }
 819
 820         update_screen(vc_cons[fg_console].d);
 821 }
 822
 823 /**
 824  *      set_con2fb_map - map console to frame buffer device
 825  *      @unit: virtual console number to map
 826  *      @newidx: frame buffer index to map virtual console to
 827  *      @user: user request
 828  *
 829  *      Maps a virtual console @unit to a frame buffer device
 830  *      @newidx.
 831  *
 832  *      This should be called with the console lock held.
 833  */
 834 static int set_con2fb_map(int unit, int newidx, int user)
 835 {
 836         struct vc_data *vc = vc_cons[unit].d;
 837         int oldidx = con2fb_map[unit];
 838         struct fb_info *info = registered_fb[newidx];
 839         struct fb_info *oldinfo = NULL;
 840         int found, err = 0;
 841
 842         WARN_CONSOLE_UNLOCKED();
 843
 844         if (oldidx == newidx)
 845                 return 0;
 846
 847         if (!info)
 848                 return -EINVAL;
 849
 850         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 851                 info_idx = newidx;
 852                 return do_fbcon_takeover(0);
 853         }
 854
 855         if (oldidx != -1)
 856                 oldinfo = registered_fb[oldidx];
 857
 858         found = search_fb_in_map(newidx);
 859
 860         con2fb_map[unit] = newidx;
 861         if (!err && !found)
 862                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 863
 864         /*
 865          * If old fb is not mapped to any of the consoles,
 866          * fbcon should release it.
 867          */
 868         if (!err && oldinfo && !search_fb_in_map(oldidx))
 869                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 870                                              found);
 871
 872         if (!err) {
 873                 int show_logo = (fg_console == 0 && !user &&
 874                                  logo_shown != FBCON_LOGO_DONTSHOW);
 875
 876                 if (!found)
 877                         fbcon_add_cursor_timer(info);
 878                 con2fb_map_boot[unit] = newidx;
 879                 con2fb_init_display(vc, info, unit, show_logo);
 880         }
 881
 882         if (!search_fb_in_map(info_idx))
 883                 info_idx = newidx;
 884
 885         return err;
 886 }
 887
 888 /*
 889  *  Low Level Operations
 890  */
 891 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 892 static int var_to_display(struct fbcon_display *disp,
 893                           struct fb_var_screeninfo *var,
 894                           struct fb_info *info)
 895 {
 896         disp->xres_virtual = var->xres_virtual;
 897         disp->yres_virtual = var->yres_virtual;
 898         disp->bits_per_pixel = var->bits_per_pixel;
 899         disp->grayscale = var->grayscale;
 900         disp->nonstd = var->nonstd;
 901         disp->accel_flags = var->accel_flags;
 902         disp->height = var->height;
 903         disp->width = var->width;
 904         disp->red = var->red;
 905         disp->green = var->green;
 906         disp->blue = var->blue;
 907         disp->transp = var->transp;
 908         disp->rotate = var->rotate;
 909         disp->mode = fb_match_mode(var, &info->modelist);
 910         if (disp->mode == NULL)
 911                 /* This should not happen */
 912                 return -EINVAL;
 913         return 0;
 914 }
 915
 916 static void display_to_var(struct fb_var_screeninfo *var,
 917                            struct fbcon_display *disp)
 918 {
 919         fb_videomode_to_var(var, disp->mode);
 920         var->xres_virtual = disp->xres_virtual;
 921         var->yres_virtual = disp->yres_virtual;
 922         var->bits_per_pixel = disp->bits_per_pixel;
 923         var->grayscale = disp->grayscale;
 924         var->nonstd = disp->nonstd;
 925         var->accel_flags = disp->accel_flags;
 926         var->height = disp->height;
 927         var->width = disp->width;
 928         var->red = disp->red;
 929         var->green = disp->green;
 930         var->blue = disp->blue;
 931         var->transp = disp->transp;
 932         var->rotate = disp->rotate;
 933 }
 934
 935 static const char *fbcon_startup(void)
 936 {
 937         const char *display_desc = "frame buffer device";
 938         struct fbcon_display *p = &fb_display[fg_console];
 939         struct vc_data *vc = vc_cons[fg_console].d;
 940         const struct font_desc *font = NULL;
 941         struct module *owner;
 942         struct fb_info *info = NULL;
 943         struct fbcon_ops *ops;
 944         int rows, cols;
 945
 946         /*
 947          *  If num_registered_fb is zero, this is a call for the dummy part.
 948          *  The frame buffer devices weren't initialized yet.
 949          */
 950         if (!num_registered_fb || info_idx == -1)
 951                 return display_desc;
 952         /*
 953          * Instead of blindly using registered_fb[0], we use info_idx, set by
 954          * fb_console_init();
 955          */
 956         info = registered_fb[info_idx];
 957         if (!info)
 958                 return NULL;
 959
 960         owner = info->fbops->owner;
 961         if (!try_module_get(owner))
 962                 return NULL;
 963         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 964                 module_put(owner);
 965                 return NULL;
 966         }
 967
 968         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 969         if (!ops) {
 970                 module_put(owner);
 971                 return NULL;
 972         }
 973
 974         ops->currcon = -1;
 975         ops->graphics = 1;
 976         ops->cur_rotate = -1;
 977         ops->cur_blink_jiffies = HZ / 5;
 978         ops->info = info;
 979         info->fbcon_par = ops;
 980
 981         p->con_rotate = initial_rotation;
 982         if (p->con_rotate == -1)
 983                 p->con_rotate = info->fbcon_rotate_hint;
 984         if (p->con_rotate == -1)
 985                 p->con_rotate = FB_ROTATE_UR;
 986
 987         set_blitting_type(vc, info);
 988
 989         /* Setup default font */
 990         if (!p->fontdata && !vc->vc_font.data) {
 991                 if (!fontname[0] || !(font = find_font(fontname)))
 992                         font = get_default_font(info->var.xres,
 993                                                 info->var.yres,
 994                                                 info->pixmap.blit_x,
 995                                                 info->pixmap.blit_y);
 996                 vc->vc_font.width = font->width;
 997                 vc->vc_font.height = font->height;
 998                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 999                 vc->vc_font.charcount = font->charcount;
1000         } else {
1001                 p->fontdata = vc->vc_font.data;
1002         }
1003
1004         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1005         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1006         cols /= vc->vc_font.width;
1007         rows /= vc->vc_font.height;
1008         vc_resize(vc, cols, rows);
1009
1010         pr_debug("mode:   %s\n", info->fix.id);
1011         pr_debug("visual: %d\n", info->fix.visual);
1012         pr_debug("res:    %dx%d-%d\n", info->var.xres,
1013                  info->var.yres,
1014                  info->var.bits_per_pixel);
1015
1016         fbcon_add_cursor_timer(info);
1017         return display_desc;
1018 }
1019
1020 static void fbcon_init(struct vc_data *vc, int init)
1021 {
1022         struct fb_info *info;
1023         struct fbcon_ops *ops;
1024         struct vc_data **default_mode = vc->vc_display_fg;
1025         struct vc_data *svc = *default_mode;
1026         struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1027         int logo = 1, new_rows, new_cols, rows, cols;
1028         int ret;
1029
1030         if (WARN_ON(info_idx == -1))
1031             return;
1032
1033         if (con2fb_map[vc->vc_num] == -1)
1034                 con2fb_map[vc->vc_num] = info_idx;
1035
1036         info = registered_fb[con2fb_map[vc->vc_num]];
1037
1038         if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1039                 logo_shown = FBCON_LOGO_DONTSHOW;
1040
1041         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1042             (info->fix.type == FB_TYPE_TEXT))
1043                 logo = 0;
1044
1045         if (var_to_display(p, &info->var, info))
1046                 return;
1047
1048         if (!info->fbcon_par)
1049                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1050
1051         /* If we are not the first console on this
1052            fb, copy the font from that console */
1053         t = &fb_display[fg_console];
1054         if (!p->fontdata) {
1055                 if (t->fontdata) {
1056                         struct vc_data *fvc = vc_cons[fg_console].d;
1057
1058                         vc->vc_font.data = (void *)(p->fontdata =
1059                                                     fvc->vc_font.data);
1060                         vc->vc_font.width = fvc->vc_font.width;
1061                         vc->vc_font.height = fvc->vc_font.height;
1062                         vc->vc_font.charcount = fvc->vc_font.charcount;
1063                         p->userfont = t->userfont;
1064
1065                         if (p->userfont)
1066                                 REFCOUNT(p->fontdata)++;
1067                 } else {
1068                         const struct font_desc *font = NULL;
1069
1070                         if (!fontname[0] || !(font = find_font(fontname)))
1071                                 font = get_default_font(info->var.xres,
1072                                                         info->var.yres,
1073                                                         info->pixmap.blit_x,
1074                                                         info->pixmap.blit_y);
1075                         vc->vc_font.width = font->width;
1076                         vc->vc_font.height = font->height;
1077                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1078                         vc->vc_font.charcount = font->charcount;
1079                 }
1080         }
1081
1082         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1083         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1084         if (vc->vc_font.charcount == 256) {
1085                 vc->vc_hi_font_mask = 0;
1086         } else {
1087                 vc->vc_hi_font_mask = 0x100;
1088                 if (vc->vc_can_do_color)
1089                         vc->vc_complement_mask <<= 1;
1090         }
1091
1092         if (!*svc->vc_uni_pagedir_loc)
1093                 con_set_default_unimap(svc);
1094         if (!*vc->vc_uni_pagedir_loc)
1095                 con_copy_unimap(vc, svc);
1096
1097         ops = info->fbcon_par;
1098         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1099
1100         p->con_rotate = initial_rotation;
1101         if (p->con_rotate == -1)
1102                 p->con_rotate = info->fbcon_rotate_hint;
1103         if (p->con_rotate == -1)
1104                 p->con_rotate = FB_ROTATE_UR;
1105
1106         set_blitting_type(vc, info);
1107
1108         cols = vc->vc_cols;
1109         rows = vc->vc_rows;
1110         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1111         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1112         new_cols /= vc->vc_font.width;
1113         new_rows /= vc->vc_font.height;
1114
1115         /*
1116          * We must always set the mode. The mode of the previous console
1117          * driver could be in the same resolution but we are using different
1118          * hardware so we have to initialize the hardware.
1119          *
1120          * We need to do it in fbcon_init() to prevent screen corruption.
1121          */
1122         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1123                 if (info->fbops->fb_set_par &&
1124                     !(ops->flags & FBCON_FLAGS_INIT)) {
1125                         ret = info->fbops->fb_set_par(info);
1126
1127                         if (ret)
1128                                 printk(KERN_ERR "fbcon_init: detected "
1129                                         "unhandled fb_set_par error, "
1130                                         "error code %d\n", ret);
1131                 }
1132
1133                 ops->flags |= FBCON_FLAGS_INIT;
1134         }
1135
1136         ops->graphics = 0;
1137
1138         /*
1139          * No more hw acceleration for fbcon.
1140          *
1141          * FIXME: Garbage collect all the now dead code after sufficient time
1142          * has passed.
1143          */
1144         p->scrollmode = SCROLL_REDRAW;
1145
1146         /*
1147          *  ++guenther: console.c:vc_allocate() relies on initializing
1148          *  vc_{cols,rows}, but we must not set those if we are only
1149          *  resizing the console.
1150          */
1151         if (init) {
1152                 vc->vc_cols = new_cols;
1153                 vc->vc_rows = new_rows;
1154         } else
1155                 vc_resize(vc, new_cols, new_rows);
1156
1157         if (logo)
1158                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1159
1160         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1161                 ops->rotate = FB_ROTATE_UR;
1162                 set_blitting_type(vc, info);
1163         }
1164
1165         ops->p = &fb_display[fg_console];
1166 }
1167
1168 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1169 {
1170         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1171                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1172         p->fontdata = NULL;
1173         p->userfont = 0;
1174 }
1175
1176 static void set_vc_hi_font(struct vc_data *vc, bool set);
1177
1178 static void fbcon_deinit(struct vc_data *vc)
1179 {
1180         struct fbcon_display *p = &fb_display[vc->vc_num];
1181         struct fb_info *info;
1182         struct fbcon_ops *ops;
1183         int idx;
1184         bool free_font = true;
1185
1186         idx = con2fb_map[vc->vc_num];
1187
1188         if (idx == -1)
1189                 goto finished;
1190
1191         info = registered_fb[idx];
1192
1193         if (!info)
1194                 goto finished;
1195
1196         if (info->flags & FBINFO_MISC_FIRMWARE)
1197                 free_font = false;
1198         ops = info->fbcon_par;
1199
1200         if (!ops)
1201                 goto finished;
1202
1203         if (con_is_visible(vc))
1204                 fbcon_del_cursor_timer(info);
1205
1206         ops->flags &= ~FBCON_FLAGS_INIT;
1207 finished:
1208
1209         fbcon_free_font(p, free_font);
1210         if (free_font)
1211                 vc->vc_font.data = NULL;
1212
1213         if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1214                 set_vc_hi_font(vc, false);
1215
1216         if (!con_is_bound(&fb_con))
1217                 fbcon_exit();
1218
1219         if (vc->vc_num == logo_shown)
1220                 logo_shown = FBCON_LOGO_CANSHOW;
1221
1222         return;
1223 }
1224
1225 /* ====================================================================== */
1226
1227 /*  fbcon_XXX routines - interface used by the world
1228  *
1229  *  This system is now divided into two levels because of complications
1230  *  caused by hardware scrolling. Top level functions:
1231  *
1232  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1233  *
1234  *  handles y values in range [0, scr_height-1] that correspond to real
1235  *  screen positions. y_wrap shift means that first line of bitmap may be
1236  *  anywhere on this display. These functions convert lineoffsets to
1237  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1238  *
1239  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1240  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1241  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1242  *
1243  *  WARNING:
1244  *
1245  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1246  *  Implies should only really hardware scroll in rows. Only reason for
1247  *  restriction is simplicity & efficiency at the moment.
1248  */
1249
1250 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1251                         int width)
1252 {
1253         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1254         struct fbcon_ops *ops = info->fbcon_par;
1255
1256         struct fbcon_display *p = &fb_display[vc->vc_num];
1257         u_int y_break;
1258
1259         if (fbcon_is_inactive(vc, info))
1260                 return;
1261
1262         if (!height || !width)
1263                 return;
1264
1265         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1266                 vc->vc_top = 0;
1267                 /*
1268                  * If the font dimensions are not an integral of the display
1269                  * dimensions then the ops->clear below won't end up clearing
1270                  * the margins.  Call clear_margins here in case the logo
1271                  * bitmap stretched into the margin area.
1272                  */
1273                 fbcon_clear_margins(vc, 0);
1274         }
1275
1276         /* Split blits that cross physical y_wrap boundary */
1277
1278         y_break = p->vrows - p->yscroll;
1279         if (sy < y_break && sy + height - 1 >= y_break) {
1280                 u_int b = y_break - sy;
1281                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1282                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1283                                  width);
1284         } else
1285                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1286 }
1287
1288 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1289                         int count, int ypos, int xpos)
1290 {
1291         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1292         struct fbcon_display *p = &fb_display[vc->vc_num];
1293         struct fbcon_ops *ops = info->fbcon_par;
1294
1295         if (!fbcon_is_inactive(vc, info))
1296                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1297                            get_color(vc, info, scr_readw(s), 1),
1298                            get_color(vc, info, scr_readw(s), 0));
1299 }
1300
1301 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1302 {
1303         unsigned short chr;
1304
1305         scr_writew(c, &chr);
1306         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1307 }
1308
1309 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1310 {
1311         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1312         struct fbcon_ops *ops = info->fbcon_par;
1313
1314         if (!fbcon_is_inactive(vc, info))
1315                 ops->clear_margins(vc, info, margin_color, bottom_only);
1316 }
1317
1318 static void fbcon_cursor(struct vc_data *vc, int mode)
1319 {
1320         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1321         struct fbcon_ops *ops = info->fbcon_par;
1322         int c = scr_readw((u16 *) vc->vc_pos);
1323
1324         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1325
1326         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1327                 return;
1328
1329         if (vc->vc_cursor_type & CUR_SW)
1330                 fbcon_del_cursor_timer(info);
1331         else
1332                 fbcon_add_cursor_timer(info);
1333
1334         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1335
1336         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 (p->scrollmode) {
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 (p->scrollmode) {
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(struct fbcon_display *p,
1951                                         struct fb_info *info,
1952                                         struct vc_data *vc)
1953 {
1954         struct fbcon_ops *ops = info->fbcon_par;
1955         int fh = vc->vc_font.height;
1956         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1957         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
1958                                    info->var.xres_virtual);
1959
1960         p->vrows = vyres/fh;
1961         if (yres > (fh * (vc->vc_rows + 1)))
1962                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
1963         if ((yres % fh) && (vyres % fh < yres % fh))
1964                 p->vrows--;
1965 }
1966
1967 #define PITCH(w) (((w) + 7) >> 3)
1968 #define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
1969
1970 static int fbcon_resize(struct vc_data *vc, unsigned int width,
1971                         unsigned int height, unsigned int user)
1972 {
1973         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1974         struct fbcon_ops *ops = info->fbcon_par;
1975         struct fbcon_display *p = &fb_display[vc->vc_num];
1976         struct fb_var_screeninfo var = info->var;
1977         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
1978
1979         if (p->userfont && FNTSIZE(vc->vc_font.data)) {
1980                 int size;
1981                 int pitch = PITCH(vc->vc_font.width);
1982
1983                 /*
1984                  * If user font, ensure that a possible change to user font
1985                  * height or width will not allow a font data out-of-bounds access.
1986                  * NOTE: must use original charcount in calculation as font
1987                  * charcount can change and cannot be used to determine the
1988                  * font data allocated size.
1989                  */
1990                 if (pitch <= 0)
1991                         return -EINVAL;
1992                 size = CALC_FONTSZ(vc->vc_font.height, pitch, vc->vc_font.charcount);
1993                 if (size > FNTSIZE(vc->vc_font.data))
1994                         return -EINVAL;
1995         }
1996
1997         virt_w = FBCON_SWAP(ops->rotate, width, height);
1998         virt_h = FBCON_SWAP(ops->rotate, height, width);
1999         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2000                                  vc->vc_font.height);
2001         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2002                                  vc->vc_font.width);
2003         var.xres = virt_w * virt_fw;
2004         var.yres = virt_h * virt_fh;
2005         x_diff = info->var.xres - var.xres;
2006         y_diff = info->var.yres - var.yres;
2007         if (x_diff < 0 || x_diff > virt_fw ||
2008             y_diff < 0 || y_diff > virt_fh) {
2009                 const struct fb_videomode *mode;
2010
2011                 pr_debug("attempting resize %ix%i\n", var.xres, var.yres);
2012                 mode = fb_find_best_mode(&var, &info->modelist);
2013                 if (mode == NULL)
2014                         return -EINVAL;
2015                 display_to_var(&var, p);
2016                 fb_videomode_to_var(&var, mode);
2017
2018                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2019                         return -EINVAL;
2020
2021                 pr_debug("resize now %ix%i\n", var.xres, var.yres);
2022                 if (con_is_visible(vc)) {
2023                         var.activate = FB_ACTIVATE_NOW |
2024                                 FB_ACTIVATE_FORCE;
2025                         fb_set_var(info, &var);
2026                 }
2027                 var_to_display(p, &info->var, info);
2028                 ops->var = info->var;
2029         }
2030         updatescrollmode(p, info, vc);
2031         return 0;
2032 }
2033
2034 static int fbcon_switch(struct vc_data *vc)
2035 {
2036         struct fb_info *info, *old_info = NULL;
2037         struct fbcon_ops *ops;
2038         struct fbcon_display *p = &fb_display[vc->vc_num];
2039         struct fb_var_screeninfo var;
2040         int i, ret, prev_console;
2041
2042         info = registered_fb[con2fb_map[vc->vc_num]];
2043         ops = info->fbcon_par;
2044
2045         if (logo_shown >= 0) {
2046                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2047
2048                 if (conp2->vc_top == logo_lines
2049                     && conp2->vc_bottom == conp2->vc_rows)
2050                         conp2->vc_top = 0;
2051                 logo_shown = FBCON_LOGO_CANSHOW;
2052         }
2053
2054         prev_console = ops->currcon;
2055         if (prev_console != -1)
2056                 old_info = registered_fb[con2fb_map[prev_console]];
2057         /*
2058          * FIXME: If we have multiple fbdev's loaded, we need to
2059          * update all info->currcon.  Perhaps, we can place this
2060          * in a centralized structure, but this might break some
2061          * drivers.
2062          *
2063          * info->currcon = vc->vc_num;
2064          */
2065         for_each_registered_fb(i) {
2066                 if (registered_fb[i]->fbcon_par) {
2067                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2068
2069                         o->currcon = vc->vc_num;
2070                 }
2071         }
2072         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2073         display_to_var(&var, p);
2074         var.activate = FB_ACTIVATE_NOW;
2075
2076         /*
2077          * make sure we don't unnecessarily trip the memcmp()
2078          * in fb_set_var()
2079          */
2080         info->var.activate = var.activate;
2081         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2082         fb_set_var(info, &var);
2083         ops->var = info->var;
2084
2085         if (old_info != NULL && (old_info != info ||
2086                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2087                 if (info->fbops->fb_set_par) {
2088                         ret = info->fbops->fb_set_par(info);
2089
2090                         if (ret)
2091                                 printk(KERN_ERR "fbcon_switch: detected "
2092                                         "unhandled fb_set_par error, "
2093                                         "error code %d\n", ret);
2094                 }
2095
2096                 if (old_info != info)
2097                         fbcon_del_cursor_timer(old_info);
2098         }
2099
2100         if (fbcon_is_inactive(vc, info) ||
2101             ops->blank_state != FB_BLANK_UNBLANK)
2102                 fbcon_del_cursor_timer(info);
2103         else
2104                 fbcon_add_cursor_timer(info);
2105
2106         set_blitting_type(vc, info);
2107         ops->cursor_reset = 1;
2108
2109         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2110                 ops->rotate = FB_ROTATE_UR;
2111                 set_blitting_type(vc, info);
2112         }
2113
2114         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2115         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2116
2117         if (vc->vc_font.charcount > 256)
2118                 vc->vc_complement_mask <<= 1;
2119
2120         updatescrollmode(p, info, vc);
2121
2122         switch (p->scrollmode) {
2123         case SCROLL_WRAP_MOVE:
2124                 scrollback_phys_max = p->vrows - vc->vc_rows;
2125                 break;
2126         case SCROLL_PAN_MOVE:
2127         case SCROLL_PAN_REDRAW:
2128                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2129                 if (scrollback_phys_max < 0)
2130                         scrollback_phys_max = 0;
2131                 break;
2132         default:
2133                 scrollback_phys_max = 0;
2134                 break;
2135         }
2136
2137         scrollback_max = 0;
2138         scrollback_current = 0;
2139
2140         if (!fbcon_is_inactive(vc, info)) {
2141             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2142             ops->update_start(info);
2143         }
2144
2145         fbcon_set_palette(vc, color_table);
2146         fbcon_clear_margins(vc, 0);
2147
2148         if (logo_shown == FBCON_LOGO_DRAW) {
2149
2150                 logo_shown = fg_console;
2151                 /* This is protected above by initmem_freed */
2152                 fb_show_logo(info, ops->rotate);
2153                 update_region(vc,
2154                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2155                               vc->vc_size_row * (vc->vc_bottom -
2156                                                  vc->vc_top) / 2);
2157                 return 0;
2158         }
2159         return 1;
2160 }
2161
2162 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2163                                 int blank)
2164 {
2165         if (blank) {
2166                 unsigned short charmask = vc->vc_hi_font_mask ?
2167                         0x1ff : 0xff;
2168                 unsigned short oldc;
2169
2170                 oldc = vc->vc_video_erase_char;
2171                 vc->vc_video_erase_char &= charmask;
2172                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2173                 vc->vc_video_erase_char = oldc;
2174         }
2175 }
2176
2177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2178 {
2179         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2180         struct fbcon_ops *ops = info->fbcon_par;
2181
2182         if (mode_switch) {
2183                 struct fb_var_screeninfo var = info->var;
2184
2185                 ops->graphics = 1;
2186
2187                 if (!blank) {
2188                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2189                                 FB_ACTIVATE_KD_TEXT;
2190                         fb_set_var(info, &var);
2191                         ops->graphics = 0;
2192                         ops->var = info->var;
2193                 }
2194         }
2195
2196         if (!fbcon_is_inactive(vc, info)) {
2197                 if (ops->blank_state != blank) {
2198                         ops->blank_state = blank;
2199                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2200                         ops->cursor_flash = (!blank);
2201
2202                         if (fb_blank(info, blank))
2203                                 fbcon_generic_blank(vc, info, blank);
2204                 }
2205
2206                 if (!blank)
2207                         update_screen(vc);
2208         }
2209
2210         if (mode_switch || fbcon_is_inactive(vc, info) ||
2211             ops->blank_state != FB_BLANK_UNBLANK)
2212                 fbcon_del_cursor_timer(info);
2213         else
2214                 fbcon_add_cursor_timer(info);
2215
2216         return 0;
2217 }
2218
2219 static int fbcon_debug_enter(struct vc_data *vc)
2220 {
2221         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2222         struct fbcon_ops *ops = info->fbcon_par;
2223
2224         ops->save_graphics = ops->graphics;
2225         ops->graphics = 0;
2226         if (info->fbops->fb_debug_enter)
2227                 info->fbops->fb_debug_enter(info);
2228         fbcon_set_palette(vc, color_table);
2229         return 0;
2230 }
2231
2232 static int fbcon_debug_leave(struct vc_data *vc)
2233 {
2234         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2235         struct fbcon_ops *ops = info->fbcon_par;
2236
2237         ops->graphics = ops->save_graphics;
2238         if (info->fbops->fb_debug_leave)
2239                 info->fbops->fb_debug_leave(info);
2240         return 0;
2241 }
2242
2243 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2244 {
2245         u8 *fontdata = vc->vc_font.data;
2246         u8 *data = font->data;
2247         int i, j;
2248
2249         font->width = vc->vc_font.width;
2250         font->height = vc->vc_font.height;
2251         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2252         if (!font->data)
2253                 return 0;
2254
2255         if (font->width <= 8) {
2256                 j = vc->vc_font.height;
2257                 if (font->charcount * j > FNTSIZE(fontdata))
2258                         return -EINVAL;
2259
2260                 for (i = 0; i < font->charcount; i++) {
2261                         memcpy(data, fontdata, j);
2262                         memset(data + j, 0, 32 - j);
2263                         data += 32;
2264                         fontdata += j;
2265                 }
2266         } else if (font->width <= 16) {
2267                 j = vc->vc_font.height * 2;
2268                 if (font->charcount * j > FNTSIZE(fontdata))
2269                         return -EINVAL;
2270
2271                 for (i = 0; i < font->charcount; i++) {
2272                         memcpy(data, fontdata, j);
2273                         memset(data + j, 0, 64 - j);
2274                         data += 64;
2275                         fontdata += j;
2276                 }
2277         } else if (font->width <= 24) {
2278                 if (font->charcount * (vc->vc_font.height * sizeof(u32)) > FNTSIZE(fontdata))
2279                         return -EINVAL;
2280
2281                 for (i = 0; i < font->charcount; i++) {
2282                         for (j = 0; j < vc->vc_font.height; j++) {
2283                                 *data++ = fontdata[0];
2284                                 *data++ = fontdata[1];
2285                                 *data++ = fontdata[2];
2286                                 fontdata += sizeof(u32);
2287                         }
2288                         memset(data, 0, 3 * (32 - j));
2289                         data += 3 * (32 - j);
2290                 }
2291         } else {
2292                 j = vc->vc_font.height * 4;
2293                 if (font->charcount * j > FNTSIZE(fontdata))
2294                         return -EINVAL;
2295
2296                 for (i = 0; i < font->charcount; i++) {
2297                         memcpy(data, fontdata, j);
2298                         memset(data + j, 0, 128 - j);
2299                         data += 128;
2300                         fontdata += j;
2301                 }
2302         }
2303         return 0;
2304 }
2305
2306 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2307 static void set_vc_hi_font(struct vc_data *vc, bool set)
2308 {
2309         if (!set) {
2310                 vc->vc_hi_font_mask = 0;
2311                 if (vc->vc_can_do_color) {
2312                         vc->vc_complement_mask >>= 1;
2313                         vc->vc_s_complement_mask >>= 1;
2314                 }
2315
2316                 /* ++Edmund: reorder the attribute bits */
2317                 if (vc->vc_can_do_color) {
2318                         unsigned short *cp =
2319                             (unsigned short *) vc->vc_origin;
2320                         int count = vc->vc_screenbuf_size / 2;
2321                         unsigned short c;
2322                         for (; count > 0; count--, cp++) {
2323                                 c = scr_readw(cp);
2324                                 scr_writew(((c & 0xfe00) >> 1) |
2325                                            (c & 0xff), cp);
2326                         }
2327                         c = vc->vc_video_erase_char;
2328                         vc->vc_video_erase_char =
2329                             ((c & 0xfe00) >> 1) | (c & 0xff);
2330                         vc->vc_attr >>= 1;
2331                 }
2332         } else {
2333                 vc->vc_hi_font_mask = 0x100;
2334                 if (vc->vc_can_do_color) {
2335                         vc->vc_complement_mask <<= 1;
2336                         vc->vc_s_complement_mask <<= 1;
2337                 }
2338
2339                 /* ++Edmund: reorder the attribute bits */
2340                 {
2341                         unsigned short *cp =
2342                             (unsigned short *) vc->vc_origin;
2343                         int count = vc->vc_screenbuf_size / 2;
2344                         unsigned short c;
2345                         for (; count > 0; count--, cp++) {
2346                                 unsigned short newc;
2347                                 c = scr_readw(cp);
2348                                 if (vc->vc_can_do_color)
2349                                         newc =
2350                                             ((c & 0xff00) << 1) | (c &
2351                                                                    0xff);
2352                                 else
2353                                         newc = c & ~0x100;
2354                                 scr_writew(newc, cp);
2355                         }
2356                         c = vc->vc_video_erase_char;
2357                         if (vc->vc_can_do_color) {
2358                                 vc->vc_video_erase_char =
2359                                     ((c & 0xff00) << 1) | (c & 0xff);
2360                                 vc->vc_attr <<= 1;
2361                         } else
2362                                 vc->vc_video_erase_char = c & ~0x100;
2363                 }
2364         }
2365 }
2366
2367 static int fbcon_do_set_font(struct vc_data *vc, int w, int h, int charcount,
2368                              const u8 * data, int userfont)
2369 {
2370         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2371         struct fbcon_ops *ops = info->fbcon_par;
2372         struct fbcon_display *p = &fb_display[vc->vc_num];
2373         int resize;
2374         char *old_data = NULL;
2375
2376         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2377         if (p->userfont)
2378                 old_data = vc->vc_font.data;
2379         vc->vc_font.data = (void *)(p->fontdata = data);
2380         if ((p->userfont = userfont))
2381                 REFCOUNT(data)++;
2382         vc->vc_font.width = w;
2383         vc->vc_font.height = h;
2384         vc->vc_font.charcount = charcount;
2385         if (vc->vc_hi_font_mask && charcount == 256)
2386                 set_vc_hi_font(vc, false);
2387         else if (!vc->vc_hi_font_mask && charcount == 512)
2388                 set_vc_hi_font(vc, true);
2389
2390         if (resize) {
2391                 int cols, rows;
2392
2393                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2394                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2395                 cols /= w;
2396                 rows /= h;
2397                 vc_resize(vc, cols, rows);
2398         } else if (con_is_visible(vc)
2399                    && vc->vc_mode == KD_TEXT) {
2400                 fbcon_clear_margins(vc, 0);
2401                 update_screen(vc);
2402         }
2403
2404         if (old_data && (--REFCOUNT(old_data) == 0))
2405                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2406         return 0;
2407 }
2408
2409 /*
2410  *  User asked to set font; we are guaranteed that
2411  *      a) width and height are in range 1..32
2412  *      b) charcount does not exceed 512
2413  *  but lets not assume that, since someone might someday want to use larger
2414  *  fonts. And charcount of 512 is small for unicode support.
2415  *
2416  *  However, user space gives the font in 32 rows , regardless of
2417  *  actual font height. So a new API is needed if support for larger fonts
2418  *  is ever implemented.
2419  */
2420
2421 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2422                           unsigned int flags)
2423 {
2424         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2425         unsigned charcount = font->charcount;
2426         int w = font->width;
2427         int h = font->height;
2428         int size;
2429         int i, csum;
2430         u8 *new_data, *data = font->data;
2431         int pitch = PITCH(font->width);
2432
2433         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2434          * If not this check should be changed to charcount < 256 */
2435         if (charcount != 256 && charcount != 512)
2436                 return -EINVAL;
2437
2438         /* Make sure drawing engine can handle the font */
2439         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2440             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2441                 return -EINVAL;
2442
2443         /* Make sure driver can handle the font length */
2444         if (fbcon_invalid_charcount(info, charcount))
2445                 return -EINVAL;
2446
2447         size = CALC_FONTSZ(h, pitch, charcount);
2448
2449         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2450
2451         if (!new_data)
2452                 return -ENOMEM;
2453
2454         memset(new_data, 0, FONT_EXTRA_WORDS * sizeof(int));
2455
2456         new_data += FONT_EXTRA_WORDS * sizeof(int);
2457         FNTSIZE(new_data) = size;
2458         REFCOUNT(new_data) = 0; /* usage counter */
2459         for (i=0; i< charcount; i++) {
2460                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2461         }
2462
2463         /* Since linux has a nice crc32 function use it for counting font
2464          * checksums. */
2465         csum = crc32(0, new_data, size);
2466
2467         FNTSUM(new_data) = csum;
2468         /* Check if the same font is on some other console already */
2469         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2470                 struct vc_data *tmp = vc_cons[i].d;
2471
2472                 if (fb_display[i].userfont &&
2473                     fb_display[i].fontdata &&
2474                     FNTSUM(fb_display[i].fontdata) == csum &&
2475                     FNTSIZE(fb_display[i].fontdata) == size &&
2476                     tmp->vc_font.width == w &&
2477                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2478                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2479                         new_data = (u8 *)fb_display[i].fontdata;
2480                         break;
2481                 }
2482         }
2483         return fbcon_do_set_font(vc, font->width, font->height, charcount, new_data, 1);
2484 }
2485
2486 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2487 {
2488         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2489         const struct font_desc *f;
2490
2491         if (!name)
2492                 f = get_default_font(info->var.xres, info->var.yres,
2493                                      info->pixmap.blit_x, info->pixmap.blit_y);
2494         else if (!(f = find_font(name)))
2495                 return -ENOENT;
2496
2497         font->width = f->width;
2498         font->height = f->height;
2499         return fbcon_do_set_font(vc, f->width, f->height, f->charcount, f->data, 0);
2500 }
2501
2502 static u16 palette_red[16];
2503 static u16 palette_green[16];
2504 static u16 palette_blue[16];
2505
2506 static struct fb_cmap palette_cmap = {
2507         0, 16, palette_red, palette_green, palette_blue, NULL
2508 };
2509
2510 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2511 {
2512         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2513         int i, j, k, depth;
2514         u8 val;
2515
2516         if (fbcon_is_inactive(vc, info))
2517                 return;
2518
2519         if (!con_is_visible(vc))
2520                 return;
2521
2522         depth = fb_get_color_depth(&info->var, &info->fix);
2523         if (depth > 3) {
2524                 for (i = j = 0; i < 16; i++) {
2525                         k = table[i];
2526                         val = vc->vc_palette[j++];
2527                         palette_red[k] = (val << 8) | val;
2528                         val = vc->vc_palette[j++];
2529                         palette_green[k] = (val << 8) | val;
2530                         val = vc->vc_palette[j++];
2531                         palette_blue[k] = (val << 8) | val;
2532                 }
2533                 palette_cmap.len = 16;
2534                 palette_cmap.start = 0;
2535         /*
2536          * If framebuffer is capable of less than 16 colors,
2537          * use default palette of fbcon.
2538          */
2539         } else
2540                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2541
2542         fb_set_cmap(&palette_cmap, info);
2543 }
2544
2545 static u16 *fbcon_screen_pos(const struct vc_data *vc, int offset)
2546 {
2547         return (u16 *) (vc->vc_origin + offset);
2548 }
2549
2550 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2551                                  int *px, int *py)
2552 {
2553         unsigned long ret;
2554         int x, y;
2555
2556         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2557                 unsigned long offset = (pos - vc->vc_origin) / 2;
2558
2559                 x = offset % vc->vc_cols;
2560                 y = offset / vc->vc_cols;
2561                 ret = pos + (vc->vc_cols - x) * 2;
2562         } else {
2563                 /* Should not happen */
2564                 x = y = 0;
2565                 ret = vc->vc_origin;
2566         }
2567         if (px)
2568                 *px = x;
2569         if (py)
2570                 *py = y;
2571         return ret;
2572 }
2573
2574 /* As we might be inside of softback, we may work with non-contiguous buffer,
2575    that's why we have to use a separate routine. */
2576 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2577 {
2578         while (cnt--) {
2579                 u16 a = scr_readw(p);
2580                 if (!vc->vc_can_do_color)
2581                         a ^= 0x0800;
2582                 else if (vc->vc_hi_font_mask == 0x100)
2583                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2584                             (((a) & 0x0e00) << 4);
2585                 else
2586                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2587                             (((a) & 0x0700) << 4);
2588                 scr_writew(a, p++);
2589         }
2590 }
2591
2592 void fbcon_suspended(struct fb_info *info)
2593 {
2594         struct vc_data *vc = NULL;
2595         struct fbcon_ops *ops = info->fbcon_par;
2596
2597         if (!ops || ops->currcon < 0)
2598                 return;
2599         vc = vc_cons[ops->currcon].d;
2600
2601         /* Clear cursor, restore saved data */
2602         fbcon_cursor(vc, CM_ERASE);
2603 }
2604
2605 void fbcon_resumed(struct fb_info *info)
2606 {
2607         struct vc_data *vc;
2608         struct fbcon_ops *ops = info->fbcon_par;
2609
2610         if (!ops || ops->currcon < 0)
2611                 return;
2612         vc = vc_cons[ops->currcon].d;
2613
2614         update_screen(vc);
2615 }
2616
2617 static void fbcon_modechanged(struct fb_info *info)
2618 {
2619         struct fbcon_ops *ops = info->fbcon_par;
2620         struct vc_data *vc;
2621         struct fbcon_display *p;
2622         int rows, cols;
2623
2624         if (!ops || ops->currcon < 0)
2625                 return;
2626         vc = vc_cons[ops->currcon].d;
2627         if (vc->vc_mode != KD_TEXT ||
2628             registered_fb[con2fb_map[ops->currcon]] != info)
2629                 return;
2630
2631         p = &fb_display[vc->vc_num];
2632         set_blitting_type(vc, info);
2633
2634         if (con_is_visible(vc)) {
2635                 var_to_display(p, &info->var, info);
2636                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2637                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2638                 cols /= vc->vc_font.width;
2639                 rows /= vc->vc_font.height;
2640                 vc_resize(vc, cols, rows);
2641                 updatescrollmode(p, info, vc);
2642                 scrollback_max = 0;
2643                 scrollback_current = 0;
2644
2645                 if (!fbcon_is_inactive(vc, info)) {
2646                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2647                     ops->update_start(info);
2648                 }
2649
2650                 fbcon_set_palette(vc, color_table);
2651                 update_screen(vc);
2652         }
2653 }
2654
2655 static void fbcon_set_all_vcs(struct fb_info *info)
2656 {
2657         struct fbcon_ops *ops = info->fbcon_par;
2658         struct vc_data *vc;
2659         struct fbcon_display *p;
2660         int i, rows, cols, fg = -1;
2661
2662         if (!ops || ops->currcon < 0)
2663                 return;
2664
2665         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2666                 vc = vc_cons[i].d;
2667                 if (!vc || vc->vc_mode != KD_TEXT ||
2668                     registered_fb[con2fb_map[i]] != info)
2669                         continue;
2670
2671                 if (con_is_visible(vc)) {
2672                         fg = i;
2673                         continue;
2674                 }
2675
2676                 p = &fb_display[vc->vc_num];
2677                 set_blitting_type(vc, info);
2678                 var_to_display(p, &info->var, info);
2679                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2680                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2681                 cols /= vc->vc_font.width;
2682                 rows /= vc->vc_font.height;
2683                 vc_resize(vc, cols, rows);
2684         }
2685
2686         if (fg != -1)
2687                 fbcon_modechanged(info);
2688 }
2689
2690
2691 void fbcon_update_vcs(struct fb_info *info, bool all)
2692 {
2693         if (all)
2694                 fbcon_set_all_vcs(info);
2695         else
2696                 fbcon_modechanged(info);
2697 }
2698 EXPORT_SYMBOL(fbcon_update_vcs);
2699
2700 int fbcon_mode_deleted(struct fb_info *info,
2701                        struct fb_videomode *mode)
2702 {
2703         struct fb_info *fb_info;
2704         struct fbcon_display *p;
2705         int i, j, found = 0;
2706
2707         /* before deletion, ensure that mode is not in use */
2708         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2709                 j = con2fb_map[i];
2710                 if (j == -1)
2711                         continue;
2712                 fb_info = registered_fb[j];
2713                 if (fb_info != info)
2714                         continue;
2715                 p = &fb_display[i];
2716                 if (!p || !p->mode)
2717                         continue;
2718                 if (fb_mode_is_equal(p->mode, mode)) {
2719                         found = 1;
2720                         break;
2721                 }
2722         }
2723         return found;
2724 }
2725
2726 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2727 static void fbcon_unbind(void)
2728 {
2729         int ret;
2730
2731         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2732                                 fbcon_is_default);
2733
2734         if (!ret)
2735                 fbcon_has_console_bind = 0;
2736 }
2737 #else
2738 static inline void fbcon_unbind(void) {}
2739 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2740
2741 /* called with console_lock held */
2742 void fbcon_fb_unbind(struct fb_info *info)
2743 {
2744         int i, new_idx = -1, ret = 0;
2745         int idx = info->node;
2746
2747         WARN_CONSOLE_UNLOCKED();
2748
2749         if (!fbcon_has_console_bind)
2750                 return;
2751
2752         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2753                 if (con2fb_map[i] != idx &&
2754                     con2fb_map[i] != -1) {
2755                         new_idx = con2fb_map[i];
2756                         break;
2757                 }
2758         }
2759
2760         if (new_idx != -1) {
2761                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2762                         if (con2fb_map[i] == idx)
2763                                 set_con2fb_map(i, new_idx, 0);
2764                 }
2765         } else {
2766                 struct fb_info *info = registered_fb[idx];
2767
2768                 /* This is sort of like set_con2fb_map, except it maps
2769                  * the consoles to no device and then releases the
2770                  * oldinfo to free memory and cancel the cursor blink
2771                  * timer. I can imagine this just becoming part of
2772                  * set_con2fb_map where new_idx is -1
2773                  */
2774                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2775                         if (con2fb_map[i] == idx) {
2776                                 con2fb_map[i] = -1;
2777                                 if (!search_fb_in_map(idx)) {
2778                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
2779                                                                      info, NULL, i,
2780                                                                      idx, 0);
2781                                         if (ret) {
2782                                                 con2fb_map[i] = idx;
2783                                                 return;
2784                                         }
2785                                 }
2786                         }
2787                 }
2788                 fbcon_unbind();
2789         }
2790 }
2791
2792 /* called with console_lock held */
2793 void fbcon_fb_unregistered(struct fb_info *info)
2794 {
2795         int i, idx;
2796
2797         WARN_CONSOLE_UNLOCKED();
2798
2799         if (deferred_takeover)
2800                 return;
2801
2802         idx = info->node;
2803         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2804                 if (con2fb_map[i] == idx)
2805                         con2fb_map[i] = -1;
2806         }
2807
2808         if (idx == info_idx) {
2809                 info_idx = -1;
2810
2811                 for_each_registered_fb(i) {
2812                         info_idx = i;
2813                         break;
2814                 }
2815         }
2816
2817         if (info_idx != -1) {
2818                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2819                         if (con2fb_map[i] == -1)
2820                                 con2fb_map[i] = info_idx;
2821                 }
2822         }
2823
2824         if (primary_device == idx)
2825                 primary_device = -1;
2826
2827         if (!num_registered_fb)
2828                 do_unregister_con_driver(&fb_con);
2829 }
2830
2831 void fbcon_remap_all(struct fb_info *info)
2832 {
2833         int i, idx = info->node;
2834
2835         console_lock();
2836         if (deferred_takeover) {
2837                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2838                         con2fb_map_boot[i] = idx;
2839                 fbcon_map_override();
2840                 console_unlock();
2841                 return;
2842         }
2843
2844         for (i = first_fb_vc; i <= last_fb_vc; i++)
2845                 set_con2fb_map(i, idx, 0);
2846
2847         if (con_is_bound(&fb_con)) {
2848                 printk(KERN_INFO "fbcon: Remapping primary device, "
2849                        "fb%i, to tty %i-%i\n", idx,
2850                        first_fb_vc + 1, last_fb_vc + 1);
2851                 info_idx = idx;
2852         }
2853         console_unlock();
2854 }
2855
2856 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
2857 static void fbcon_select_primary(struct fb_info *info)
2858 {
2859         if (!map_override && primary_device == -1 &&
2860             fb_is_primary_device(info)) {
2861                 int i;
2862
2863                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
2864                        info->fix.id, info->node);
2865                 primary_device = info->node;
2866
2867                 for (i = first_fb_vc; i <= last_fb_vc; i++)
2868                         con2fb_map_boot[i] = primary_device;
2869
2870                 if (con_is_bound(&fb_con)) {
2871                         printk(KERN_INFO "fbcon: Remapping primary device, "
2872                                "fb%i, to tty %i-%i\n", info->node,
2873                                first_fb_vc + 1, last_fb_vc + 1);
2874                         info_idx = primary_device;
2875                 }
2876         }
2877
2878 }
2879 #else
2880 static inline void fbcon_select_primary(struct fb_info *info)
2881 {
2882         return;
2883 }
2884 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
2885
2886 /* called with console_lock held */
2887 int fbcon_fb_registered(struct fb_info *info)
2888 {
2889         int ret = 0, i, idx;
2890
2891         WARN_CONSOLE_UNLOCKED();
2892
2893         idx = info->node;
2894         fbcon_select_primary(info);
2895
2896         if (deferred_takeover) {
2897                 pr_info("fbcon: Deferring console take-over\n");
2898                 return 0;
2899         }
2900
2901         if (info_idx == -1) {
2902                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2903                         if (con2fb_map_boot[i] == idx) {
2904                                 info_idx = idx;
2905                                 break;
2906                         }
2907                 }
2908
2909                 if (info_idx != -1)
2910                         ret = do_fbcon_takeover(1);
2911         } else {
2912                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2913                         if (con2fb_map_boot[i] == idx)
2914                                 set_con2fb_map(i, idx, 0);
2915                 }
2916         }
2917
2918         return ret;
2919 }
2920
2921 void fbcon_fb_blanked(struct fb_info *info, int blank)
2922 {
2923         struct fbcon_ops *ops = info->fbcon_par;
2924         struct vc_data *vc;
2925
2926         if (!ops || ops->currcon < 0)
2927                 return;
2928
2929         vc = vc_cons[ops->currcon].d;
2930         if (vc->vc_mode != KD_TEXT ||
2931                         registered_fb[con2fb_map[ops->currcon]] != info)
2932                 return;
2933
2934         if (con_is_visible(vc)) {
2935                 if (blank)
2936                         do_blank_screen(0);
2937                 else
2938                         do_unblank_screen(0);
2939         }
2940         ops->blank_state = blank;
2941 }
2942
2943 void fbcon_new_modelist(struct fb_info *info)
2944 {
2945         int i;
2946         struct vc_data *vc;
2947         struct fb_var_screeninfo var;
2948         const struct fb_videomode *mode;
2949
2950         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2951                 if (registered_fb[con2fb_map[i]] != info)
2952                         continue;
2953                 if (!fb_display[i].mode)
2954                         continue;
2955                 vc = vc_cons[i].d;
2956                 display_to_var(&var, &fb_display[i]);
2957                 mode = fb_find_nearest_mode(fb_display[i].mode,
2958                                             &info->modelist);
2959                 fb_videomode_to_var(&var, mode);
2960                 fbcon_set_disp(info, &var, vc->vc_num);
2961         }
2962 }
2963
2964 void fbcon_get_requirement(struct fb_info *info,
2965                            struct fb_blit_caps *caps)
2966 {
2967         struct vc_data *vc;
2968
2969         if (caps->flags) {
2970                 int i, charcnt;
2971
2972                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2973                         vc = vc_cons[i].d;
2974                         if (vc && vc->vc_mode == KD_TEXT &&
2975                             info->node == con2fb_map[i]) {
2976                                 caps->x |= 1 << (vc->vc_font.width - 1);
2977                                 caps->y |= 1 << (vc->vc_font.height - 1);
2978                                 charcnt = vc->vc_font.charcount;
2979                                 if (caps->len < charcnt)
2980                                         caps->len = charcnt;
2981                         }
2982                 }
2983         } else {
2984                 vc = vc_cons[fg_console].d;
2985
2986                 if (vc && vc->vc_mode == KD_TEXT &&
2987                     info->node == con2fb_map[fg_console]) {
2988                         caps->x = 1 << (vc->vc_font.width - 1);
2989                         caps->y = 1 << (vc->vc_font.height - 1);
2990                         caps->len = vc->vc_font.charcount;
2991                 }
2992         }
2993 }
2994
2995 int fbcon_set_con2fb_map_ioctl(void __user *argp)
2996 {
2997         struct fb_con2fbmap con2fb;
2998         int ret;
2999
3000         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3001                 return -EFAULT;
3002         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3003                 return -EINVAL;
3004         if (con2fb.framebuffer >= FB_MAX)
3005                 return -EINVAL;
3006         if (!registered_fb[con2fb.framebuffer])
3007                 request_module("fb%d", con2fb.framebuffer);
3008         if (!registered_fb[con2fb.framebuffer]) {
3009                 return -EINVAL;
3010         }
3011
3012         console_lock();
3013         ret = set_con2fb_map(con2fb.console - 1,
3014                              con2fb.framebuffer, 1);
3015         console_unlock();
3016
3017         return ret;
3018 }
3019
3020 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3021 {
3022         struct fb_con2fbmap con2fb;
3023
3024         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3025                 return -EFAULT;
3026         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3027                 return -EINVAL;
3028
3029         console_lock();
3030         con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3031         console_unlock();
3032
3033         return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3034 }
3035
3036 /*
3037  *  The console `switch' structure for the frame buffer based console
3038  */
3039
3040 static const struct consw fb_con = {
3041         .owner                  = THIS_MODULE,
3042         .con_startup            = fbcon_startup,
3043         .con_init               = fbcon_init,
3044         .con_deinit             = fbcon_deinit,
3045         .con_clear              = fbcon_clear,
3046         .con_putc               = fbcon_putc,
3047         .con_putcs              = fbcon_putcs,
3048         .con_cursor             = fbcon_cursor,
3049         .con_scroll             = fbcon_scroll,
3050         .con_switch             = fbcon_switch,
3051         .con_blank              = fbcon_blank,
3052         .con_font_set           = fbcon_set_font,
3053         .con_font_get           = fbcon_get_font,
3054         .con_font_default       = fbcon_set_def_font,
3055         .con_set_palette        = fbcon_set_palette,
3056         .con_invert_region      = fbcon_invert_region,
3057         .con_screen_pos         = fbcon_screen_pos,
3058         .con_getxy              = fbcon_getxy,
3059         .con_resize             = fbcon_resize,
3060         .con_debug_enter        = fbcon_debug_enter,
3061         .con_debug_leave        = fbcon_debug_leave,
3062 };
3063
3064 static ssize_t store_rotate(struct device *device,
3065                             struct device_attribute *attr, const char *buf,
3066                             size_t count)
3067 {
3068         struct fb_info *info;
3069         int rotate, idx;
3070         char **last = NULL;
3071
3072         console_lock();
3073         idx = con2fb_map[fg_console];
3074
3075         if (idx == -1 || registered_fb[idx] == NULL)
3076                 goto err;
3077
3078         info = registered_fb[idx];
3079         rotate = simple_strtoul(buf, last, 0);
3080         fbcon_rotate(info, rotate);
3081 err:
3082         console_unlock();
3083         return count;
3084 }
3085
3086 static ssize_t store_rotate_all(struct device *device,
3087                                 struct device_attribute *attr,const char *buf,
3088                                 size_t count)
3089 {
3090         struct fb_info *info;
3091         int rotate, idx;
3092         char **last = NULL;
3093
3094         console_lock();
3095         idx = con2fb_map[fg_console];
3096
3097         if (idx == -1 || registered_fb[idx] == NULL)
3098                 goto err;
3099
3100         info = registered_fb[idx];
3101         rotate = simple_strtoul(buf, last, 0);
3102         fbcon_rotate_all(info, rotate);
3103 err:
3104         console_unlock();
3105         return count;
3106 }
3107
3108 static ssize_t show_rotate(struct device *device,
3109                            struct device_attribute *attr,char *buf)
3110 {
3111         struct fb_info *info;
3112         int rotate = 0, idx;
3113
3114         console_lock();
3115         idx = con2fb_map[fg_console];
3116
3117         if (idx == -1 || registered_fb[idx] == NULL)
3118                 goto err;
3119
3120         info = registered_fb[idx];
3121         rotate = fbcon_get_rotate(info);
3122 err:
3123         console_unlock();
3124         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3125 }
3126
3127 static ssize_t show_cursor_blink(struct device *device,
3128                                  struct device_attribute *attr, char *buf)
3129 {
3130         struct fb_info *info;
3131         struct fbcon_ops *ops;
3132         int idx, blink = -1;
3133
3134         console_lock();
3135         idx = con2fb_map[fg_console];
3136
3137         if (idx == -1 || registered_fb[idx] == NULL)
3138                 goto err;
3139
3140         info = registered_fb[idx];
3141         ops = info->fbcon_par;
3142
3143         if (!ops)
3144                 goto err;
3145
3146         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3147 err:
3148         console_unlock();
3149         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3150 }
3151
3152 static ssize_t store_cursor_blink(struct device *device,
3153                                   struct device_attribute *attr,
3154                                   const char *buf, size_t count)
3155 {
3156         struct fb_info *info;
3157         int blink, idx;
3158         char **last = NULL;
3159
3160         console_lock();
3161         idx = con2fb_map[fg_console];
3162
3163         if (idx == -1 || registered_fb[idx] == NULL)
3164                 goto err;
3165
3166         info = registered_fb[idx];
3167
3168         if (!info->fbcon_par)
3169                 goto err;
3170
3171         blink = simple_strtoul(buf, last, 0);
3172
3173         if (blink) {
3174                 fbcon_cursor_noblink = 0;
3175                 fbcon_add_cursor_timer(info);
3176         } else {
3177                 fbcon_cursor_noblink = 1;
3178                 fbcon_del_cursor_timer(info);
3179         }
3180
3181 err:
3182         console_unlock();
3183         return count;
3184 }
3185
3186 static struct device_attribute device_attrs[] = {
3187         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3188         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3189         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3190                store_cursor_blink),
3191 };
3192
3193 static int fbcon_init_device(void)
3194 {
3195         int i, error = 0;
3196
3197         fbcon_has_sysfs = 1;
3198
3199         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3200                 error = device_create_file(fbcon_device, &device_attrs[i]);
3201
3202                 if (error)
3203                         break;
3204         }
3205
3206         if (error) {
3207                 while (--i >= 0)
3208                         device_remove_file(fbcon_device, &device_attrs[i]);
3209
3210                 fbcon_has_sysfs = 0;
3211         }
3212
3213         return 0;
3214 }
3215
3216 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3217 static void fbcon_register_existing_fbs(struct work_struct *work)
3218 {
3219         int i;
3220
3221         console_lock();
3222
3223         for_each_registered_fb(i)
3224                 fbcon_fb_registered(registered_fb[i]);
3225
3226         console_unlock();
3227 }
3228
3229 static struct notifier_block fbcon_output_nb;
3230 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3231
3232 static int fbcon_output_notifier(struct notifier_block *nb,
3233                                  unsigned long action, void *data)
3234 {
3235         WARN_CONSOLE_UNLOCKED();
3236
3237         pr_info("fbcon: Taking over console\n");
3238
3239         dummycon_unregister_output_notifier(&fbcon_output_nb);
3240         deferred_takeover = false;
3241         logo_shown = FBCON_LOGO_DONTSHOW;
3242
3243         /* We may get called in atomic context */
3244         schedule_work(&fbcon_deferred_takeover_work);
3245
3246         return NOTIFY_OK;
3247 }
3248 #endif
3249
3250 static void fbcon_start(void)
3251 {
3252         WARN_CONSOLE_UNLOCKED();
3253
3254 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3255         if (conswitchp != &dummy_con)
3256                 deferred_takeover = false;
3257
3258         if (deferred_takeover) {
3259                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3260                 dummycon_register_output_notifier(&fbcon_output_nb);
3261                 return;
3262         }
3263 #endif
3264
3265         if (num_registered_fb) {
3266                 int i;
3267
3268                 for_each_registered_fb(i) {
3269                         info_idx = i;
3270                         break;
3271                 }
3272
3273                 do_fbcon_takeover(0);
3274         }
3275 }
3276
3277 static void fbcon_exit(void)
3278 {
3279         struct fb_info *info;
3280         int i, j, mapped;
3281
3282 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3283         if (deferred_takeover) {
3284                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3285                 deferred_takeover = false;
3286         }
3287 #endif
3288
3289         for_each_registered_fb(i) {
3290                 int pending = 0;
3291
3292                 mapped = 0;
3293                 info = registered_fb[i];
3294
3295                 if (info->queue.func)
3296                         pending = cancel_work_sync(&info->queue);
3297                 pr_debug("fbcon: %s pending work\n", (pending ? "canceled" : "no"));
3298
3299                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3300                         if (con2fb_map[j] == i) {
3301                                 mapped = 1;
3302                                 con2fb_map[j] = -1;
3303                         }
3304                 }
3305
3306                 if (mapped) {
3307                         if (info->fbops->fb_release)
3308                                 info->fbops->fb_release(info, 0);
3309                         module_put(info->fbops->owner);
3310
3311                         if (info->fbcon_par) {
3312                                 struct fbcon_ops *ops = info->fbcon_par;
3313
3314                                 fbcon_del_cursor_timer(info);
3315                                 kfree(ops->cursor_src);
3316                                 kfree(ops->cursor_state.mask);
3317                                 kfree(info->fbcon_par);
3318                                 info->fbcon_par = NULL;
3319                         }
3320
3321                         if (info->queue.func == fb_flashcursor)
3322                                 info->queue.func = NULL;
3323                 }
3324         }
3325 }
3326
3327 void __init fb_console_init(void)
3328 {
3329         int i;
3330
3331         console_lock();
3332         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3333                                      "fbcon");
3334
3335         if (IS_ERR(fbcon_device)) {
3336                 printk(KERN_WARNING "Unable to create device "
3337                        "for fbcon; errno = %ld\n",
3338                        PTR_ERR(fbcon_device));
3339                 fbcon_device = NULL;
3340         } else
3341                 fbcon_init_device();
3342
3343         for (i = 0; i < MAX_NR_CONSOLES; i++)
3344                 con2fb_map[i] = -1;
3345
3346         fbcon_start();
3347         console_unlock();
3348 }
3349
3350 #ifdef MODULE
3351
3352 static void __exit fbcon_deinit_device(void)
3353 {
3354         int i;
3355
3356         if (fbcon_has_sysfs) {
3357                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3358                         device_remove_file(fbcon_device, &device_attrs[i]);
3359
3360                 fbcon_has_sysfs = 0;
3361         }
3362 }
3363
3364 void __exit fb_console_exit(void)
3365 {
3366         console_lock();
3367         fbcon_deinit_device();
3368         device_destroy(fb_class, MKDEV(0, 0));
3369         fbcon_exit();
3370         do_unregister_con_driver(&fb_con);
3371         console_unlock();
3372 }
3373 #endif