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 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/fbcon.h>
  72 #include <linux/vt_kern.h>
  73 #include <linux/selection.h>
  74 #include <linux/font.h>
  75 #include <linux/smp.h>
  76 #include <linux/init.h>
  77 #include <linux/interrupt.h>
  78 #include <linux/crc32.h> /* For counting font checksums */
  79 #include <linux/uaccess.h>
  80 #include <asm/fb.h>
  81 #include <asm/irq.h>
  82
  83 #include "fbcon.h"
  84
  85 #ifdef FBCONDEBUG
  86 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  87 #else
  88 #  define DPRINTK(fmt, args...)
  89 #endif
  90
  91 /*
  92  * FIXME: Locking
  93  *
  94  * - fbcon state itself is protected by the console_lock, and the code does a
  95  *   pretty good job at making sure that lock is held everywhere it's needed.
  96  *
  97  * - access to the registered_fb array is entirely unprotected. This should use
  98  *   proper object lifetime handling, i.e. get/put_fb_info. This also means
  99  *   switching from indices to proper pointers for fb_info everywhere.
 100  *
 101  * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
 102  *   means concurrent access to the same fbdev from both fbcon and userspace
 103  *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
 104  *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
 105  *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
 106  *   fbmem.c cannot use locking asserts, and there's lots of callers which get
 107  *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
 108  */
 109
 110 enum {
 111         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 112         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 113         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 114 };
 115
 116 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
 117
 118 static signed char con2fb_map[MAX_NR_CONSOLES];
 119 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 120
 121 static int logo_lines;
 122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 123    enums.  */
 124 static int logo_shown = FBCON_LOGO_CANSHOW;
 125 /* Software scrollback */
 126 static int fbcon_softback_size = 32768;
 127 static unsigned long softback_buf, softback_curr;
 128 static unsigned long softback_in;
 129 static unsigned long softback_top, softback_end;
 130 static int softback_lines;
 131 /* console mappings */
 132 static int first_fb_vc;
 133 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 134 static int fbcon_is_default = 1;
 135 static int primary_device = -1;
 136 static int fbcon_has_console_bind;
 137
 138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 139 static int map_override;
 140
 141 static inline void fbcon_map_override(void)
 142 {
 143         map_override = 1;
 144 }
 145 #else
 146 static inline void fbcon_map_override(void)
 147 {
 148 }
 149 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 150
 151 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 152 static bool deferred_takeover = true;
 153 #else
 154 #define deferred_takeover false
 155 #endif
 156
 157 /* font data */
 158 static char fontname[40];
 159
 160 /* current fb_info */
 161 static int info_idx = -1;
 162
 163 /* console rotation */
 164 static int initial_rotation = -1;
 165 static int fbcon_has_sysfs;
 166 static int margin_color;
 167
 168 static const struct consw fb_con;
 169
 170 #define CM_SOFTBACK     (8)
 171
 172 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 173
 174 static int fbcon_set_origin(struct vc_data *);
 175
 176 static int fbcon_cursor_noblink;
 177
 178 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 179
 180 /*
 181  *  Interface used by the world
 182  */
 183
 184 static const char *fbcon_startup(void);
 185 static void fbcon_init(struct vc_data *vc, int init);
 186 static void fbcon_deinit(struct vc_data *vc);
 187 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 188                         int width);
 189 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 190 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 191                         int count, int ypos, int xpos);
 192 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 193 static void fbcon_cursor(struct vc_data *vc, int mode);
 194 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 195                         int height, int width);
 196 static int fbcon_switch(struct vc_data *vc);
 197 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 198 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
 199
 200 /*
 201  *  Internal routines
 202  */
 203 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 204 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 205 static __inline__ void ypan_up(struct vc_data *vc, int count);
 206 static __inline__ void ypan_down(struct vc_data *vc, int count);
 207 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 208                             int dy, int dx, int height, int width, u_int y_break);
 209 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 210                            int unit);
 211 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 212                               int line, int count, int dy);
 213 static void fbcon_modechanged(struct fb_info *info);
 214 static void fbcon_set_all_vcs(struct fb_info *info);
 215 static void fbcon_start(void);
 216 static void fbcon_exit(void);
 217 static struct device *fbcon_device;
 218
 219 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 220 static inline void fbcon_set_rotation(struct fb_info *info)
 221 {
 222         struct fbcon_ops *ops = info->fbcon_par;
 223
 224         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 225             ops->p->con_rotate < 4)
 226                 ops->rotate = ops->p->con_rotate;
 227         else
 228                 ops->rotate = 0;
 229 }
 230
 231 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 232 {
 233         struct fbcon_ops *ops= info->fbcon_par;
 234         struct fb_info *fb_info;
 235
 236         if (!ops || ops->currcon == -1)
 237                 return;
 238
 239         fb_info = registered_fb[con2fb_map[ops->currcon]];
 240
 241         if (info == fb_info) {
 242                 struct fbcon_display *p = &fb_display[ops->currcon];
 243
 244                 if (rotate < 4)
 245                         p->con_rotate = rotate;
 246                 else
 247                         p->con_rotate = 0;
 248
 249                 fbcon_modechanged(info);
 250         }
 251 }
 252
 253 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 254 {
 255         struct fbcon_ops *ops = info->fbcon_par;
 256         struct vc_data *vc;
 257         struct fbcon_display *p;
 258         int i;
 259
 260         if (!ops || ops->currcon < 0 || rotate > 3)
 261                 return;
 262
 263         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 264                 vc = vc_cons[i].d;
 265                 if (!vc || vc->vc_mode != KD_TEXT ||
 266                     registered_fb[con2fb_map[i]] != info)
 267                         continue;
 268
 269                 p = &fb_display[vc->vc_num];
 270                 p->con_rotate = rotate;
 271         }
 272
 273         fbcon_set_all_vcs(info);
 274 }
 275 #else
 276 static inline void fbcon_set_rotation(struct fb_info *info)
 277 {
 278         struct fbcon_ops *ops = info->fbcon_par;
 279
 280         ops->rotate = FB_ROTATE_UR;
 281 }
 282
 283 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 284 {
 285         return;
 286 }
 287
 288 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 289 {
 290         return;
 291 }
 292 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 293
 294 static int fbcon_get_rotate(struct fb_info *info)
 295 {
 296         struct fbcon_ops *ops = info->fbcon_par;
 297
 298         return (ops) ? ops->rotate : 0;
 299 }
 300
 301 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 302 {
 303         struct fbcon_ops *ops = info->fbcon_par;
 304
 305         return (info->state != FBINFO_STATE_RUNNING ||
 306                 vc->vc_mode != KD_TEXT || ops->graphics);
 307 }
 308
 309 static int get_color(struct vc_data *vc, struct fb_info *info,
 310               u16 c, int is_fg)
 311 {
 312         int depth = fb_get_color_depth(&info->var, &info->fix);
 313         int color = 0;
 314
 315         if (console_blanked) {
 316                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 317
 318                 c = vc->vc_video_erase_char & charmask;
 319         }
 320
 321         if (depth != 1)
 322                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 323                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 324
 325         switch (depth) {
 326         case 1:
 327         {
 328                 int col = mono_col(info);
 329                 /* 0 or 1 */
 330                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 331                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 332
 333                 if (console_blanked)
 334                         fg = bg;
 335
 336                 color = (is_fg) ? fg : bg;
 337                 break;
 338         }
 339         case 2:
 340                 /*
 341                  * Scale down 16-colors to 4 colors. Default 4-color palette
 342                  * is grayscale. However, simply dividing the values by 4
 343                  * will not work, as colors 1, 2 and 3 will be scaled-down
 344                  * to zero rendering them invisible.  So empirically convert
 345                  * colors to a sane 4-level grayscale.
 346                  */
 347                 switch (color) {
 348                 case 0:
 349                         color = 0; /* black */
 350                         break;
 351                 case 1 ... 6:
 352                         color = 2; /* white */
 353                         break;
 354                 case 7 ... 8:
 355                         color = 1; /* gray */
 356                         break;
 357                 default:
 358                         color = 3; /* intense white */
 359                         break;
 360                 }
 361                 break;
 362         case 3:
 363                 /*
 364                  * Last 8 entries of default 16-color palette is a more intense
 365                  * version of the first 8 (i.e., same chrominance, different
 366                  * luminance).
 367                  */
 368                 color &= 7;
 369                 break;
 370         }
 371
 372
 373         return color;
 374 }
 375
 376 static void fbcon_update_softback(struct vc_data *vc)
 377 {
 378         int l = fbcon_softback_size / vc->vc_size_row;
 379
 380         if (l > 5)
 381                 softback_end = softback_buf + l * vc->vc_size_row;
 382         else
 383                 /* Smaller scrollback makes no sense, and 0 would screw
 384                    the operation totally */
 385                 softback_top = 0;
 386 }
 387
 388 static void fb_flashcursor(struct work_struct *work)
 389 {
 390         struct fb_info *info = container_of(work, struct fb_info, queue);
 391         struct fbcon_ops *ops = info->fbcon_par;
 392         struct vc_data *vc = NULL;
 393         int c;
 394         int mode;
 395         int ret;
 396
 397         /* FIXME: we should sort out the unbind locking instead */
 398         /* instead we just fail to flash the cursor if we can't get
 399          * the lock instead of blocking fbcon deinit */
 400         ret = console_trylock();
 401         if (ret == 0)
 402                 return;
 403
 404         if (ops && ops->currcon != -1)
 405                 vc = vc_cons[ops->currcon].d;
 406
 407         if (!vc || !con_is_visible(vc) ||
 408             registered_fb[con2fb_map[vc->vc_num]] != info ||
 409             vc->vc_deccm != 1) {
 410                 console_unlock();
 411                 return;
 412         }
 413
 414         c = scr_readw((u16 *) vc->vc_pos);
 415         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 416                 CM_ERASE : CM_DRAW;
 417         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 418                     get_color(vc, info, c, 0));
 419         console_unlock();
 420 }
 421
 422 static void cursor_timer_handler(struct timer_list *t)
 423 {
 424         struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
 425         struct fb_info *info = ops->info;
 426
 427         queue_work(system_power_efficient_wq, &info->queue);
 428         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 429 }
 430
 431 static void fbcon_add_cursor_timer(struct fb_info *info)
 432 {
 433         struct fbcon_ops *ops = info->fbcon_par;
 434
 435         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 436             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 437             !fbcon_cursor_noblink) {
 438                 if (!info->queue.func)
 439                         INIT_WORK(&info->queue, fb_flashcursor);
 440
 441                 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
 442                 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 443                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 444         }
 445 }
 446
 447 static void fbcon_del_cursor_timer(struct fb_info *info)
 448 {
 449         struct fbcon_ops *ops = info->fbcon_par;
 450
 451         if (info->queue.func == fb_flashcursor &&
 452             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 453                 del_timer_sync(&ops->cursor_timer);
 454                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 455         }
 456 }
 457
 458 #ifndef MODULE
 459 static int __init fb_console_setup(char *this_opt)
 460 {
 461         char *options;
 462         int i, j;
 463
 464         if (!this_opt || !*this_opt)
 465                 return 1;
 466
 467         while ((options = strsep(&this_opt, ",")) != NULL) {
 468                 if (!strncmp(options, "font:", 5)) {
 469                         strlcpy(fontname, options + 5, sizeof(fontname));
 470                         continue;
 471                 }
 472
 473                 if (!strncmp(options, "scrollback:", 11)) {
 474                         options += 11;
 475                         if (*options) {
 476                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 477                                 if (*options == 'k' || *options == 'K') {
 478                                         fbcon_softback_size *= 1024;
 479                                 }
 480                         }
 481                         continue;
 482                 }
 483
 484                 if (!strncmp(options, "map:", 4)) {
 485                         options += 4;
 486                         if (*options) {
 487                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 488                                         if (!options[j])
 489                                                 j = 0;
 490                                         con2fb_map_boot[i] =
 491                                                 (options[j++]-'0') % FB_MAX;
 492                                 }
 493
 494                                 fbcon_map_override();
 495                         }
 496                         continue;
 497                 }
 498
 499                 if (!strncmp(options, "vc:", 3)) {
 500                         options += 3;
 501                         if (*options)
 502                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 503                         if (first_fb_vc < 0)
 504                                 first_fb_vc = 0;
 505                         if (*options++ == '-')
 506                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 507                         fbcon_is_default = 0;
 508                         continue;
 509                 }
 510
 511                 if (!strncmp(options, "rotate:", 7)) {
 512                         options += 7;
 513                         if (*options)
 514                                 initial_rotation = simple_strtoul(options, &options, 0);
 515                         if (initial_rotation > 3)
 516                                 initial_rotation = 0;
 517                         continue;
 518                 }
 519
 520                 if (!strncmp(options, "margin:", 7)) {
 521                         options += 7;
 522                         if (*options)
 523                                 margin_color = simple_strtoul(options, &options, 0);
 524                         continue;
 525                 }
 526 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 527                 if (!strcmp(options, "nodefer")) {
 528                         deferred_takeover = false;
 529                         continue;
 530                 }
 531 #endif
 532
 533                 if (!strncmp(options, "logo-pos:", 9)) {
 534                         options += 9;
 535                         if (!strcmp(options, "center"))
 536                                 fb_center_logo = true;
 537                         continue;
 538                 }
 539
 540                 if (!strncmp(options, "logo-count:", 11)) {
 541                         options += 11;
 542                         if (*options)
 543                                 fb_logo_count = simple_strtol(options, &options, 0);
 544                         continue;
 545                 }
 546         }
 547         return 1;
 548 }
 549
 550 __setup("fbcon=", fb_console_setup);
 551 #endif
 552
 553 static int search_fb_in_map(int idx)
 554 {
 555         int i, retval = 0;
 556
 557         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 558                 if (con2fb_map[i] == idx)
 559                         retval = 1;
 560         }
 561         return retval;
 562 }
 563
 564 static int search_for_mapped_con(void)
 565 {
 566         int i, retval = 0;
 567
 568         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 569                 if (con2fb_map[i] != -1)
 570                         retval = 1;
 571         }
 572         return retval;
 573 }
 574
 575 static int do_fbcon_takeover(int show_logo)
 576 {
 577         int err, i;
 578
 579         if (!num_registered_fb)
 580                 return -ENODEV;
 581
 582         if (!show_logo)
 583                 logo_shown = FBCON_LOGO_DONTSHOW;
 584
 585         for (i = first_fb_vc; i <= last_fb_vc; i++)
 586                 con2fb_map[i] = info_idx;
 587
 588         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 589                                 fbcon_is_default);
 590
 591         if (err) {
 592                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 593                         con2fb_map[i] = -1;
 594                 info_idx = -1;
 595         } else {
 596                 fbcon_has_console_bind = 1;
 597         }
 598
 599         return err;
 600 }
 601
 602 #ifdef MODULE
 603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 604                                int cols, int rows, int new_cols, int new_rows)
 605 {
 606         logo_shown = FBCON_LOGO_DONTSHOW;
 607 }
 608 #else
 609 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 610                                int cols, int rows, int new_cols, int new_rows)
 611 {
 612         /* Need to make room for the logo */
 613         struct fbcon_ops *ops = info->fbcon_par;
 614         int cnt, erase = vc->vc_video_erase_char, step;
 615         unsigned short *save = NULL, *r, *q;
 616         int logo_height;
 617
 618         if (info->fbops->owner) {
 619                 logo_shown = FBCON_LOGO_DONTSHOW;
 620                 return;
 621         }
 622
 623         /*
 624          * remove underline attribute from erase character
 625          * if black and white framebuffer.
 626          */
 627         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 628                 erase &= ~0x400;
 629         logo_height = fb_prepare_logo(info, ops->rotate);
 630         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 631         q = (unsigned short *) (vc->vc_origin +
 632                                 vc->vc_size_row * rows);
 633         step = logo_lines * cols;
 634         for (r = q - logo_lines * cols; r < q; r++)
 635                 if (scr_readw(r) != vc->vc_video_erase_char)
 636                         break;
 637         if (r != q && new_rows >= rows + logo_lines) {
 638                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 639                                GFP_KERNEL);
 640                 if (save) {
 641                         int i = cols < new_cols ? cols : new_cols;
 642                         scr_memsetw(save, erase, array3_size(logo_lines, new_cols, 2));
 643                         r = q - step;
 644                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 645                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 646                         r = q;
 647                 }
 648         }
 649         if (r == q) {
 650                 /* We can scroll screen down */
 651                 r = q - step - cols;
 652                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 653                         scr_memcpyw(r + step, r, vc->vc_size_row);
 654                         r -= cols;
 655                 }
 656                 if (!save) {
 657                         int lines;
 658                         if (vc->state.y + logo_lines >= rows)
 659                                 lines = rows - vc->state.y - 1;
 660                         else
 661                                 lines = logo_lines;
 662                         vc->state.y += lines;
 663                         vc->vc_pos += lines * vc->vc_size_row;
 664                 }
 665         }
 666         scr_memsetw((unsigned short *) vc->vc_origin,
 667                     erase,
 668                     vc->vc_size_row * logo_lines);
 669
 670         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 671                 fbcon_clear_margins(vc, 0);
 672                 update_screen(vc);
 673         }
 674
 675         if (save) {
 676                 q = (unsigned short *) (vc->vc_origin +
 677                                         vc->vc_size_row *
 678                                         rows);
 679                 scr_memcpyw(q, save, array3_size(logo_lines, new_cols, 2));
 680                 vc->state.y += logo_lines;
 681                 vc->vc_pos += logo_lines * vc->vc_size_row;
 682                 kfree(save);
 683         }
 684
 685         if (logo_shown == FBCON_LOGO_DONTSHOW)
 686                 return;
 687
 688         if (logo_lines > vc->vc_bottom) {
 689                 logo_shown = FBCON_LOGO_CANSHOW;
 690                 printk(KERN_INFO
 691                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 692         } else {
 693                 logo_shown = FBCON_LOGO_DRAW;
 694                 vc->vc_top = logo_lines;
 695         }
 696 }
 697 #endif /* MODULE */
 698
 699 #ifdef CONFIG_FB_TILEBLITTING
 700 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 701 {
 702         struct fbcon_ops *ops = info->fbcon_par;
 703
 704         ops->p = &fb_display[vc->vc_num];
 705
 706         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 707                 fbcon_set_tileops(vc, info);
 708         else {
 709                 fbcon_set_rotation(info);
 710                 fbcon_set_bitops(ops);
 711         }
 712 }
 713
 714 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 715 {
 716         int err = 0;
 717
 718         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 719             info->tileops->fb_get_tilemax(info) < charcount)
 720                 err = 1;
 721
 722         return err;
 723 }
 724 #else
 725 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 726 {
 727         struct fbcon_ops *ops = info->fbcon_par;
 728
 729         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 730         ops->p = &fb_display[vc->vc_num];
 731         fbcon_set_rotation(info);
 732         fbcon_set_bitops(ops);
 733 }
 734
 735 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 736 {
 737         return 0;
 738 }
 739
 740 #endif /* CONFIG_MISC_TILEBLITTING */
 741
 742
 743 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 744                                   int unit, int oldidx)
 745 {
 746         struct fbcon_ops *ops = NULL;
 747         int err = 0;
 748
 749         if (!try_module_get(info->fbops->owner))
 750                 err = -ENODEV;
 751
 752         if (!err && info->fbops->fb_open &&
 753             info->fbops->fb_open(info, 0))
 754                 err = -ENODEV;
 755
 756         if (!err) {
 757                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 758                 if (!ops)
 759                         err = -ENOMEM;
 760         }
 761
 762         if (!err) {
 763                 ops->cur_blink_jiffies = HZ / 5;
 764                 ops->info = info;
 765                 info->fbcon_par = ops;
 766
 767                 if (vc)
 768                         set_blitting_type(vc, info);
 769         }
 770
 771         if (err) {
 772                 con2fb_map[unit] = oldidx;
 773                 module_put(info->fbops->owner);
 774         }
 775
 776         return err;
 777 }
 778
 779 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 780                                   struct fb_info *newinfo, int unit,
 781                                   int oldidx, int found)
 782 {
 783         struct fbcon_ops *ops = oldinfo->fbcon_par;
 784         int err = 0, ret;
 785
 786         if (oldinfo->fbops->fb_release &&
 787             oldinfo->fbops->fb_release(oldinfo, 0)) {
 788                 con2fb_map[unit] = oldidx;
 789                 if (!found && newinfo->fbops->fb_release)
 790                         newinfo->fbops->fb_release(newinfo, 0);
 791                 if (!found)
 792                         module_put(newinfo->fbops->owner);
 793                 err = -ENODEV;
 794         }
 795
 796         if (!err) {
 797                 fbcon_del_cursor_timer(oldinfo);
 798                 kfree(ops->cursor_state.mask);
 799                 kfree(ops->cursor_data);
 800                 kfree(ops->cursor_src);
 801                 kfree(ops->fontbuffer);
 802                 kfree(oldinfo->fbcon_par);
 803                 oldinfo->fbcon_par = NULL;
 804                 module_put(oldinfo->fbops->owner);
 805                 /*
 806                   If oldinfo and newinfo are driving the same hardware,
 807                   the fb_release() method of oldinfo may attempt to
 808                   restore the hardware state.  This will leave the
 809                   newinfo in an undefined state. Thus, a call to
 810                   fb_set_par() may be needed for the newinfo.
 811                 */
 812                 if (newinfo && newinfo->fbops->fb_set_par) {
 813                         ret = newinfo->fbops->fb_set_par(newinfo);
 814
 815                         if (ret)
 816                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 817                                         "detected unhandled fb_set_par error, "
 818                                         "error code %d\n", ret);
 819                 }
 820         }
 821
 822         return err;
 823 }
 824
 825 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 826                                 int unit, int show_logo)
 827 {
 828         struct fbcon_ops *ops = info->fbcon_par;
 829         int ret;
 830
 831         ops->currcon = fg_console;
 832
 833         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 834                 ret = info->fbops->fb_set_par(info);
 835
 836                 if (ret)
 837                         printk(KERN_ERR "con2fb_init_display: detected "
 838                                 "unhandled fb_set_par error, "
 839                                 "error code %d\n", ret);
 840         }
 841
 842         ops->flags |= FBCON_FLAGS_INIT;
 843         ops->graphics = 0;
 844         fbcon_set_disp(info, &info->var, unit);
 845
 846         if (show_logo) {
 847                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 848                 struct fb_info *fg_info =
 849                         registered_fb[con2fb_map[fg_console]];
 850
 851                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 852                                    fg_vc->vc_rows, fg_vc->vc_cols,
 853                                    fg_vc->vc_rows);
 854         }
 855
 856         update_screen(vc_cons[fg_console].d);
 857 }
 858
 859 /**
 860  *      set_con2fb_map - map console to frame buffer device
 861  *      @unit: virtual console number to map
 862  *      @newidx: frame buffer index to map virtual console to
 863  *      @user: user request
 864  *
 865  *      Maps a virtual console @unit to a frame buffer device
 866  *      @newidx.
 867  *
 868  *      This should be called with the console lock held.
 869  */
 870 static int set_con2fb_map(int unit, int newidx, int user)
 871 {
 872         struct vc_data *vc = vc_cons[unit].d;
 873         int oldidx = con2fb_map[unit];
 874         struct fb_info *info = registered_fb[newidx];
 875         struct fb_info *oldinfo = NULL;
 876         int found, err = 0;
 877
 878         WARN_CONSOLE_UNLOCKED();
 879
 880         if (oldidx == newidx)
 881                 return 0;
 882
 883         if (!info)
 884                 return -EINVAL;
 885
 886         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 887                 info_idx = newidx;
 888                 return do_fbcon_takeover(0);
 889         }
 890
 891         if (oldidx != -1)
 892                 oldinfo = registered_fb[oldidx];
 893
 894         found = search_fb_in_map(newidx);
 895
 896         con2fb_map[unit] = newidx;
 897         if (!err && !found)
 898                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 899
 900         /*
 901          * If old fb is not mapped to any of the consoles,
 902          * fbcon should release it.
 903          */
 904         if (!err && oldinfo && !search_fb_in_map(oldidx))
 905                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 906                                              found);
 907
 908         if (!err) {
 909                 int show_logo = (fg_console == 0 && !user &&
 910                                  logo_shown != FBCON_LOGO_DONTSHOW);
 911
 912                 if (!found)
 913                         fbcon_add_cursor_timer(info);
 914                 con2fb_map_boot[unit] = newidx;
 915                 con2fb_init_display(vc, info, unit, show_logo);
 916         }
 917
 918         if (!search_fb_in_map(info_idx))
 919                 info_idx = newidx;
 920
 921         return err;
 922 }
 923
 924 /*
 925  *  Low Level Operations
 926  */
 927 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 928 static int var_to_display(struct fbcon_display *disp,
 929                           struct fb_var_screeninfo *var,
 930                           struct fb_info *info)
 931 {
 932         disp->xres_virtual = var->xres_virtual;
 933         disp->yres_virtual = var->yres_virtual;
 934         disp->bits_per_pixel = var->bits_per_pixel;
 935         disp->grayscale = var->grayscale;
 936         disp->nonstd = var->nonstd;
 937         disp->accel_flags = var->accel_flags;
 938         disp->height = var->height;
 939         disp->width = var->width;
 940         disp->red = var->red;
 941         disp->green = var->green;
 942         disp->blue = var->blue;
 943         disp->transp = var->transp;
 944         disp->rotate = var->rotate;
 945         disp->mode = fb_match_mode(var, &info->modelist);
 946         if (disp->mode == NULL)
 947                 /* This should not happen */
 948                 return -EINVAL;
 949         return 0;
 950 }
 951
 952 static void display_to_var(struct fb_var_screeninfo *var,
 953                            struct fbcon_display *disp)
 954 {
 955         fb_videomode_to_var(var, disp->mode);
 956         var->xres_virtual = disp->xres_virtual;
 957         var->yres_virtual = disp->yres_virtual;
 958         var->bits_per_pixel = disp->bits_per_pixel;
 959         var->grayscale = disp->grayscale;
 960         var->nonstd = disp->nonstd;
 961         var->accel_flags = disp->accel_flags;
 962         var->height = disp->height;
 963         var->width = disp->width;
 964         var->red = disp->red;
 965         var->green = disp->green;
 966         var->blue = disp->blue;
 967         var->transp = disp->transp;
 968         var->rotate = disp->rotate;
 969 }
 970
 971 static const char *fbcon_startup(void)
 972 {
 973         const char *display_desc = "frame buffer device";
 974         struct fbcon_display *p = &fb_display[fg_console];
 975         struct vc_data *vc = vc_cons[fg_console].d;
 976         const struct font_desc *font = NULL;
 977         struct module *owner;
 978         struct fb_info *info = NULL;
 979         struct fbcon_ops *ops;
 980         int rows, cols;
 981
 982         /*
 983          *  If num_registered_fb is zero, this is a call for the dummy part.
 984          *  The frame buffer devices weren't initialized yet.
 985          */
 986         if (!num_registered_fb || info_idx == -1)
 987                 return display_desc;
 988         /*
 989          * Instead of blindly using registered_fb[0], we use info_idx, set by
 990          * fb_console_init();
 991          */
 992         info = registered_fb[info_idx];
 993         if (!info)
 994                 return NULL;
 995
 996         owner = info->fbops->owner;
 997         if (!try_module_get(owner))
 998                 return NULL;
 999         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
1000                 module_put(owner);
1001                 return NULL;
1002         }
1003
1004         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
1005         if (!ops) {
1006                 module_put(owner);
1007                 return NULL;
1008         }
1009
1010         ops->currcon = -1;
1011         ops->graphics = 1;
1012         ops->cur_rotate = -1;
1013         ops->cur_blink_jiffies = HZ / 5;
1014         ops->info = info;
1015         info->fbcon_par = ops;
1016
1017         p->con_rotate = initial_rotation;
1018         if (p->con_rotate == -1)
1019                 p->con_rotate = info->fbcon_rotate_hint;
1020         if (p->con_rotate == -1)
1021                 p->con_rotate = FB_ROTATE_UR;
1022
1023         set_blitting_type(vc, info);
1024
1025         if (info->fix.type != FB_TYPE_TEXT) {
1026                 if (fbcon_softback_size) {
1027                         if (!softback_buf) {
1028                                 softback_buf =
1029                                     (unsigned long)
1030                                     kvmalloc(fbcon_softback_size,
1031                                             GFP_KERNEL);
1032                                 if (!softback_buf) {
1033                                         fbcon_softback_size = 0;
1034                                         softback_top = 0;
1035                                 }
1036                         }
1037                 } else {
1038                         if (softback_buf) {
1039                                 kvfree((void *) softback_buf);
1040                                 softback_buf = 0;
1041                                 softback_top = 0;
1042                         }
1043                 }
1044                 if (softback_buf)
1045                         softback_in = softback_top = softback_curr =
1046                             softback_buf;
1047                 softback_lines = 0;
1048         }
1049
1050         /* Setup default font */
1051         if (!p->fontdata && !vc->vc_font.data) {
1052                 if (!fontname[0] || !(font = find_font(fontname)))
1053                         font = get_default_font(info->var.xres,
1054                                                 info->var.yres,
1055                                                 info->pixmap.blit_x,
1056                                                 info->pixmap.blit_y);
1057                 vc->vc_font.width = font->width;
1058                 vc->vc_font.height = font->height;
1059                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1060                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1061         } else {
1062                 p->fontdata = vc->vc_font.data;
1063         }
1064
1065         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1066         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1067         cols /= vc->vc_font.width;
1068         rows /= vc->vc_font.height;
1069         vc_resize(vc, cols, rows);
1070
1071         DPRINTK("mode:   %s\n", info->fix.id);
1072         DPRINTK("visual: %d\n", info->fix.visual);
1073         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1074                 info->var.yres,
1075                 info->var.bits_per_pixel);
1076
1077         fbcon_add_cursor_timer(info);
1078         return display_desc;
1079 }
1080
1081 static void fbcon_init(struct vc_data *vc, int init)
1082 {
1083         struct fb_info *info;
1084         struct fbcon_ops *ops;
1085         struct vc_data **default_mode = vc->vc_display_fg;
1086         struct vc_data *svc = *default_mode;
1087         struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1088         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1089         int cap, ret;
1090
1091         if (WARN_ON(info_idx == -1))
1092             return;
1093
1094         if (con2fb_map[vc->vc_num] == -1)
1095                 con2fb_map[vc->vc_num] = info_idx;
1096
1097         info = registered_fb[con2fb_map[vc->vc_num]];
1098         cap = info->flags;
1099
1100         if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1101                 logo_shown = FBCON_LOGO_DONTSHOW;
1102
1103         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1104             (info->fix.type == FB_TYPE_TEXT))
1105                 logo = 0;
1106
1107         if (var_to_display(p, &info->var, info))
1108                 return;
1109
1110         if (!info->fbcon_par)
1111                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1112
1113         /* If we are not the first console on this
1114            fb, copy the font from that console */
1115         t = &fb_display[fg_console];
1116         if (!p->fontdata) {
1117                 if (t->fontdata) {
1118                         struct vc_data *fvc = vc_cons[fg_console].d;
1119
1120                         vc->vc_font.data = (void *)(p->fontdata =
1121                                                     fvc->vc_font.data);
1122                         vc->vc_font.width = fvc->vc_font.width;
1123                         vc->vc_font.height = fvc->vc_font.height;
1124                         p->userfont = t->userfont;
1125
1126                         if (p->userfont)
1127                                 REFCOUNT(p->fontdata)++;
1128                 } else {
1129                         const struct font_desc *font = NULL;
1130
1131                         if (!fontname[0] || !(font = find_font(fontname)))
1132                                 font = get_default_font(info->var.xres,
1133                                                         info->var.yres,
1134                                                         info->pixmap.blit_x,
1135                                                         info->pixmap.blit_y);
1136                         vc->vc_font.width = font->width;
1137                         vc->vc_font.height = font->height;
1138                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1139                         vc->vc_font.charcount = 256; /* FIXME  Need to
1140                                                         support more fonts */
1141                 }
1142         }
1143
1144         if (p->userfont)
1145                 charcnt = FNTCHARCNT(p->fontdata);
1146
1147         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1148         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1149         if (charcnt == 256) {
1150                 vc->vc_hi_font_mask = 0;
1151         } else {
1152                 vc->vc_hi_font_mask = 0x100;
1153                 if (vc->vc_can_do_color)
1154                         vc->vc_complement_mask <<= 1;
1155         }
1156
1157         if (!*svc->vc_uni_pagedir_loc)
1158                 con_set_default_unimap(svc);
1159         if (!*vc->vc_uni_pagedir_loc)
1160                 con_copy_unimap(vc, svc);
1161
1162         ops = info->fbcon_par;
1163         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1164
1165         p->con_rotate = initial_rotation;
1166         if (p->con_rotate == -1)
1167                 p->con_rotate = info->fbcon_rotate_hint;
1168         if (p->con_rotate == -1)
1169                 p->con_rotate = FB_ROTATE_UR;
1170
1171         set_blitting_type(vc, info);
1172
1173         cols = vc->vc_cols;
1174         rows = vc->vc_rows;
1175         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1176         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1177         new_cols /= vc->vc_font.width;
1178         new_rows /= vc->vc_font.height;
1179
1180         /*
1181          * We must always set the mode. The mode of the previous console
1182          * driver could be in the same resolution but we are using different
1183          * hardware so we have to initialize the hardware.
1184          *
1185          * We need to do it in fbcon_init() to prevent screen corruption.
1186          */
1187         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1188                 if (info->fbops->fb_set_par &&
1189                     !(ops->flags & FBCON_FLAGS_INIT)) {
1190                         ret = info->fbops->fb_set_par(info);
1191
1192                         if (ret)
1193                                 printk(KERN_ERR "fbcon_init: detected "
1194                                         "unhandled fb_set_par error, "
1195                                         "error code %d\n", ret);
1196                 }
1197
1198                 ops->flags |= FBCON_FLAGS_INIT;
1199         }
1200
1201         ops->graphics = 0;
1202
1203         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1204             !(cap & FBINFO_HWACCEL_DISABLED))
1205                 p->scrollmode = SCROLL_MOVE;
1206         else /* default to something safe */
1207                 p->scrollmode = SCROLL_REDRAW;
1208
1209         /*
1210          *  ++guenther: console.c:vc_allocate() relies on initializing
1211          *  vc_{cols,rows}, but we must not set those if we are only
1212          *  resizing the console.
1213          */
1214         if (init) {
1215                 vc->vc_cols = new_cols;
1216                 vc->vc_rows = new_rows;
1217         } else
1218                 vc_resize(vc, new_cols, new_rows);
1219
1220         if (logo)
1221                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1222
1223         if (vc == svc && softback_buf)
1224                 fbcon_update_softback(vc);
1225
1226         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1227                 ops->rotate = FB_ROTATE_UR;
1228                 set_blitting_type(vc, info);
1229         }
1230
1231         ops->p = &fb_display[fg_console];
1232 }
1233
1234 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1235 {
1236         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1237                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1238         p->fontdata = NULL;
1239         p->userfont = 0;
1240 }
1241
1242 static void set_vc_hi_font(struct vc_data *vc, bool set);
1243
1244 static void fbcon_deinit(struct vc_data *vc)
1245 {
1246         struct fbcon_display *p = &fb_display[vc->vc_num];
1247         struct fb_info *info;
1248         struct fbcon_ops *ops;
1249         int idx;
1250         bool free_font = true;
1251
1252         idx = con2fb_map[vc->vc_num];
1253
1254         if (idx == -1)
1255                 goto finished;
1256
1257         info = registered_fb[idx];
1258
1259         if (!info)
1260                 goto finished;
1261
1262         if (info->flags & FBINFO_MISC_FIRMWARE)
1263                 free_font = false;
1264         ops = info->fbcon_par;
1265
1266         if (!ops)
1267                 goto finished;
1268
1269         if (con_is_visible(vc))
1270                 fbcon_del_cursor_timer(info);
1271
1272         ops->flags &= ~FBCON_FLAGS_INIT;
1273 finished:
1274
1275         fbcon_free_font(p, free_font);
1276         if (free_font)
1277                 vc->vc_font.data = NULL;
1278
1279         if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1280                 set_vc_hi_font(vc, false);
1281
1282         if (!con_is_bound(&fb_con))
1283                 fbcon_exit();
1284
1285         if (vc->vc_num == logo_shown)
1286                 logo_shown = FBCON_LOGO_CANSHOW;
1287
1288         return;
1289 }
1290
1291 /* ====================================================================== */
1292
1293 /*  fbcon_XXX routines - interface used by the world
1294  *
1295  *  This system is now divided into two levels because of complications
1296  *  caused by hardware scrolling. Top level functions:
1297  *
1298  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1299  *
1300  *  handles y values in range [0, scr_height-1] that correspond to real
1301  *  screen positions. y_wrap shift means that first line of bitmap may be
1302  *  anywhere on this display. These functions convert lineoffsets to
1303  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1304  *
1305  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1306  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1307  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1308  *
1309  *  WARNING:
1310  *
1311  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1312  *  Implies should only really hardware scroll in rows. Only reason for
1313  *  restriction is simplicity & efficiency at the moment.
1314  */
1315
1316 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1317                         int width)
1318 {
1319         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1320         struct fbcon_ops *ops = info->fbcon_par;
1321
1322         struct fbcon_display *p = &fb_display[vc->vc_num];
1323         u_int y_break;
1324
1325         if (fbcon_is_inactive(vc, info))
1326                 return;
1327
1328         if (!height || !width)
1329                 return;
1330
1331         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1332                 vc->vc_top = 0;
1333                 /*
1334                  * If the font dimensions are not an integral of the display
1335                  * dimensions then the ops->clear below won't end up clearing
1336                  * the margins.  Call clear_margins here in case the logo
1337                  * bitmap stretched into the margin area.
1338                  */
1339                 fbcon_clear_margins(vc, 0);
1340         }
1341
1342         /* Split blits that cross physical y_wrap boundary */
1343
1344         y_break = p->vrows - p->yscroll;
1345         if (sy < y_break && sy + height - 1 >= y_break) {
1346                 u_int b = y_break - sy;
1347                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1348                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1349                                  width);
1350         } else
1351                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1352 }
1353
1354 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1355                         int count, int ypos, int xpos)
1356 {
1357         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1358         struct fbcon_display *p = &fb_display[vc->vc_num];
1359         struct fbcon_ops *ops = info->fbcon_par;
1360
1361         if (!fbcon_is_inactive(vc, info))
1362                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1363                            get_color(vc, info, scr_readw(s), 1),
1364                            get_color(vc, info, scr_readw(s), 0));
1365 }
1366
1367 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1368 {
1369         unsigned short chr;
1370
1371         scr_writew(c, &chr);
1372         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1373 }
1374
1375 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1376 {
1377         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1378         struct fbcon_ops *ops = info->fbcon_par;
1379
1380         if (!fbcon_is_inactive(vc, info))
1381                 ops->clear_margins(vc, info, margin_color, bottom_only);
1382 }
1383
1384 static void fbcon_cursor(struct vc_data *vc, int mode)
1385 {
1386         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1387         struct fbcon_ops *ops = info->fbcon_par;
1388         int y;
1389         int c = scr_readw((u16 *) vc->vc_pos);
1390
1391         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1392
1393         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1394                 return;
1395
1396         if (vc->vc_cursor_type & CUR_SW)
1397                 fbcon_del_cursor_timer(info);
1398         else
1399                 fbcon_add_cursor_timer(info);
1400
1401         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1402         if (mode & CM_SOFTBACK) {
1403                 mode &= ~CM_SOFTBACK;
1404                 y = softback_lines;
1405         } else {
1406                 if (softback_lines)
1407                         fbcon_set_origin(vc);
1408                 y = 0;
1409         }
1410
1411         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1412                     get_color(vc, info, c, 0));
1413 }
1414
1415 static int scrollback_phys_max = 0;
1416 static int scrollback_max = 0;
1417 static int scrollback_current = 0;
1418
1419 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1420                            int unit)
1421 {
1422         struct fbcon_display *p, *t;
1423         struct vc_data **default_mode, *vc;
1424         struct vc_data *svc;
1425         struct fbcon_ops *ops = info->fbcon_par;
1426         int rows, cols, charcnt = 256;
1427
1428         p = &fb_display[unit];
1429
1430         if (var_to_display(p, var, info))
1431                 return;
1432
1433         vc = vc_cons[unit].d;
1434
1435         if (!vc)
1436                 return;
1437
1438         default_mode = vc->vc_display_fg;
1439         svc = *default_mode;
1440         t = &fb_display[svc->vc_num];
1441
1442         if (!vc->vc_font.data) {
1443                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1444                 vc->vc_font.width = (*default_mode)->vc_font.width;
1445                 vc->vc_font.height = (*default_mode)->vc_font.height;
1446                 p->userfont = t->userfont;
1447                 if (p->userfont)
1448                         REFCOUNT(p->fontdata)++;
1449         }
1450         if (p->userfont)
1451                 charcnt = FNTCHARCNT(p->fontdata);
1452
1453         var->activate = FB_ACTIVATE_NOW;
1454         info->var.activate = var->activate;
1455         var->yoffset = info->var.yoffset;
1456         var->xoffset = info->var.xoffset;
1457         fb_set_var(info, var);
1458         ops->var = info->var;
1459         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1460         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1461         if (charcnt == 256) {
1462                 vc->vc_hi_font_mask = 0;
1463         } else {
1464                 vc->vc_hi_font_mask = 0x100;
1465                 if (vc->vc_can_do_color)
1466                         vc->vc_complement_mask <<= 1;
1467         }
1468
1469         if (!*svc->vc_uni_pagedir_loc)
1470                 con_set_default_unimap(svc);
1471         if (!*vc->vc_uni_pagedir_loc)
1472                 con_copy_unimap(vc, svc);
1473
1474         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1475         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1476         cols /= vc->vc_font.width;
1477         rows /= vc->vc_font.height;
1478         vc_resize(vc, cols, rows);
1479
1480         if (con_is_visible(vc)) {
1481                 update_screen(vc);
1482                 if (softback_buf)
1483                         fbcon_update_softback(vc);
1484         }
1485 }
1486
1487 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1488 {
1489         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1490         struct fbcon_ops *ops = info->fbcon_par;
1491         struct fbcon_display *p = &fb_display[vc->vc_num];
1492
1493         p->yscroll += count;
1494         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1495                 p->yscroll -= p->vrows;
1496         ops->var.xoffset = 0;
1497         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1498         ops->var.vmode |= FB_VMODE_YWRAP;
1499         ops->update_start(info);
1500         scrollback_max += count;
1501         if (scrollback_max > scrollback_phys_max)
1502                 scrollback_max = scrollback_phys_max;
1503         scrollback_current = 0;
1504 }
1505
1506 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1507 {
1508         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1509         struct fbcon_ops *ops = info->fbcon_par;
1510         struct fbcon_display *p = &fb_display[vc->vc_num];
1511
1512         p->yscroll -= count;
1513         if (p->yscroll < 0)     /* Deal with wrap */
1514                 p->yscroll += p->vrows;
1515         ops->var.xoffset = 0;
1516         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1517         ops->var.vmode |= FB_VMODE_YWRAP;
1518         ops->update_start(info);
1519         scrollback_max -= count;
1520         if (scrollback_max < 0)
1521                 scrollback_max = 0;
1522         scrollback_current = 0;
1523 }
1524
1525 static __inline__ void ypan_up(struct vc_data *vc, int count)
1526 {
1527         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1528         struct fbcon_display *p = &fb_display[vc->vc_num];
1529         struct fbcon_ops *ops = info->fbcon_par;
1530
1531         p->yscroll += count;
1532         if (p->yscroll > p->vrows - vc->vc_rows) {
1533                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1534                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1535                 p->yscroll -= p->vrows - vc->vc_rows;
1536         }
1537
1538         ops->var.xoffset = 0;
1539         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1540         ops->var.vmode &= ~FB_VMODE_YWRAP;
1541         ops->update_start(info);
1542         fbcon_clear_margins(vc, 1);
1543         scrollback_max += count;
1544         if (scrollback_max > scrollback_phys_max)
1545                 scrollback_max = scrollback_phys_max;
1546         scrollback_current = 0;
1547 }
1548
1549 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1550 {
1551         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1552         struct fbcon_ops *ops = info->fbcon_par;
1553         struct fbcon_display *p = &fb_display[vc->vc_num];
1554
1555         p->yscroll += count;
1556
1557         if (p->yscroll > p->vrows - vc->vc_rows) {
1558                 p->yscroll -= p->vrows - vc->vc_rows;
1559                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1560         }
1561
1562         ops->var.xoffset = 0;
1563         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1564         ops->var.vmode &= ~FB_VMODE_YWRAP;
1565         ops->update_start(info);
1566         fbcon_clear_margins(vc, 1);
1567         scrollback_max += count;
1568         if (scrollback_max > scrollback_phys_max)
1569                 scrollback_max = scrollback_phys_max;
1570         scrollback_current = 0;
1571 }
1572
1573 static __inline__ void ypan_down(struct vc_data *vc, int count)
1574 {
1575         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1576         struct fbcon_display *p = &fb_display[vc->vc_num];
1577         struct fbcon_ops *ops = info->fbcon_par;
1578
1579         p->yscroll -= count;
1580         if (p->yscroll < 0) {
1581                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1582                             0, vc->vc_rows, vc->vc_cols);
1583                 p->yscroll += p->vrows - vc->vc_rows;
1584         }
1585
1586         ops->var.xoffset = 0;
1587         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1588         ops->var.vmode &= ~FB_VMODE_YWRAP;
1589         ops->update_start(info);
1590         fbcon_clear_margins(vc, 1);
1591         scrollback_max -= count;
1592         if (scrollback_max < 0)
1593                 scrollback_max = 0;
1594         scrollback_current = 0;
1595 }
1596
1597 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1598 {
1599         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1600         struct fbcon_ops *ops = info->fbcon_par;
1601         struct fbcon_display *p = &fb_display[vc->vc_num];
1602
1603         p->yscroll -= count;
1604
1605         if (p->yscroll < 0) {
1606                 p->yscroll += p->vrows - vc->vc_rows;
1607                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1608         }
1609
1610         ops->var.xoffset = 0;
1611         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1612         ops->var.vmode &= ~FB_VMODE_YWRAP;
1613         ops->update_start(info);
1614         fbcon_clear_margins(vc, 1);
1615         scrollback_max -= count;
1616         if (scrollback_max < 0)
1617                 scrollback_max = 0;
1618         scrollback_current = 0;
1619 }
1620
1621 static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
1622                                   long delta)
1623 {
1624         int count = vc->vc_rows;
1625         unsigned short *d, *s;
1626         unsigned long n;
1627         int line = 0;
1628
1629         d = (u16 *) softback_curr;
1630         if (d == (u16 *) softback_in)
1631                 d = (u16 *) vc->vc_origin;
1632         n = softback_curr + delta * vc->vc_size_row;
1633         softback_lines -= delta;
1634         if (delta < 0) {
1635                 if (softback_curr < softback_top && n < softback_buf) {
1636                         n += softback_end - softback_buf;
1637                         if (n < softback_top) {
1638                                 softback_lines -=
1639                                     (softback_top - n) / vc->vc_size_row;
1640                                 n = softback_top;
1641                         }
1642                 } else if (softback_curr >= softback_top
1643                            && n < softback_top) {
1644                         softback_lines -=
1645                             (softback_top - n) / vc->vc_size_row;
1646                         n = softback_top;
1647                 }
1648         } else {
1649                 if (softback_curr > softback_in && n >= softback_end) {
1650                         n += softback_buf - softback_end;
1651                         if (n > softback_in) {
1652                                 n = softback_in;
1653                                 softback_lines = 0;
1654                         }
1655                 } else if (softback_curr <= softback_in && n > softback_in) {
1656                         n = softback_in;
1657                         softback_lines = 0;
1658                 }
1659         }
1660         if (n == softback_curr)
1661                 return;
1662         softback_curr = n;
1663         s = (u16 *) softback_curr;
1664         if (s == (u16 *) softback_in)
1665                 s = (u16 *) vc->vc_origin;
1666         while (count--) {
1667                 unsigned short *start;
1668                 unsigned short *le;
1669                 unsigned short c;
1670                 int x = 0;
1671                 unsigned short attr = 1;
1672
1673                 start = s;
1674                 le = advance_row(s, 1);
1675                 do {
1676                         c = scr_readw(s);
1677                         if (attr != (c & 0xff00)) {
1678                                 attr = c & 0xff00;
1679                                 if (s > start) {
1680                                         fbcon_putcs(vc, start, s - start,
1681                                                     line, x);
1682                                         x += s - start;
1683                                         start = s;
1684                                 }
1685                         }
1686                         if (c == scr_readw(d)) {
1687                                 if (s > start) {
1688                                         fbcon_putcs(vc, start, s - start,
1689                                                     line, x);
1690                                         x += s - start + 1;
1691                                         start = s + 1;
1692                                 } else {
1693                                         x++;
1694                                         start++;
1695                                 }
1696                         }
1697                         s++;
1698                         d++;
1699                 } while (s < le);
1700                 if (s > start)
1701                         fbcon_putcs(vc, start, s - start, line, x);
1702                 line++;
1703                 if (d == (u16 *) softback_end)
1704                         d = (u16 *) softback_buf;
1705                 if (d == (u16 *) softback_in)
1706                         d = (u16 *) vc->vc_origin;
1707                 if (s == (u16 *) softback_end)
1708                         s = (u16 *) softback_buf;
1709                 if (s == (u16 *) softback_in)
1710                         s = (u16 *) vc->vc_origin;
1711         }
1712 }
1713
1714 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1715                               int line, int count, int dy)
1716 {
1717         unsigned short *s = (unsigned short *)
1718                 (vc->vc_origin + vc->vc_size_row * line);
1719
1720         while (count--) {
1721                 unsigned short *start = s;
1722                 unsigned short *le = advance_row(s, 1);
1723                 unsigned short c;
1724                 int x = 0;
1725                 unsigned short attr = 1;
1726
1727                 do {
1728                         c = scr_readw(s);
1729                         if (attr != (c & 0xff00)) {
1730                                 attr = c & 0xff00;
1731                                 if (s > start) {
1732                                         fbcon_putcs(vc, start, s - start,
1733                                                     dy, x);
1734                                         x += s - start;
1735                                         start = s;
1736                                 }
1737                         }
1738                         console_conditional_schedule();
1739                         s++;
1740                 } while (s < le);
1741                 if (s > start)
1742                         fbcon_putcs(vc, start, s - start, dy, x);
1743                 console_conditional_schedule();
1744                 dy++;
1745         }
1746 }
1747
1748 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1749                         struct fbcon_display *p, int line, int count, int ycount)
1750 {
1751         int offset = ycount * vc->vc_cols;
1752         unsigned short *d = (unsigned short *)
1753             (vc->vc_origin + vc->vc_size_row * line);
1754         unsigned short *s = d + offset;
1755         struct fbcon_ops *ops = info->fbcon_par;
1756
1757         while (count--) {
1758                 unsigned short *start = s;
1759                 unsigned short *le = advance_row(s, 1);
1760                 unsigned short c;
1761                 int x = 0;
1762
1763                 do {
1764                         c = scr_readw(s);
1765
1766                         if (c == scr_readw(d)) {
1767                                 if (s > start) {
1768                                         ops->bmove(vc, info, line + ycount, x,
1769                                                    line, x, 1, s-start);
1770                                         x += s - start + 1;
1771                                         start = s + 1;
1772                                 } else {
1773                                         x++;
1774                                         start++;
1775                                 }
1776                         }
1777
1778                         scr_writew(c, d);
1779                         console_conditional_schedule();
1780                         s++;
1781                         d++;
1782                 } while (s < le);
1783                 if (s > start)
1784                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1785                                    s-start);
1786                 console_conditional_schedule();
1787                 if (ycount > 0)
1788                         line++;
1789                 else {
1790                         line--;
1791                         /* NOTE: We subtract two lines from these pointers */
1792                         s -= vc->vc_size_row;
1793                         d -= vc->vc_size_row;
1794                 }
1795         }
1796 }
1797
1798 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1799                          int line, int count, int offset)
1800 {
1801         unsigned short *d = (unsigned short *)
1802             (vc->vc_origin + vc->vc_size_row * line);
1803         unsigned short *s = d + offset;
1804
1805         while (count--) {
1806                 unsigned short *start = s;
1807                 unsigned short *le = advance_row(s, 1);
1808                 unsigned short c;
1809                 int x = 0;
1810                 unsigned short attr = 1;
1811
1812                 do {
1813                         c = scr_readw(s);
1814                         if (attr != (c & 0xff00)) {
1815                                 attr = c & 0xff00;
1816                                 if (s > start) {
1817                                         fbcon_putcs(vc, start, s - start,
1818                                                     line, x);
1819                                         x += s - start;
1820                                         start = s;
1821                                 }
1822                         }
1823                         if (c == scr_readw(d)) {
1824                                 if (s > start) {
1825                                         fbcon_putcs(vc, start, s - start,
1826                                                      line, x);
1827                                         x += s - start + 1;
1828                                         start = s + 1;
1829                                 } else {
1830                                         x++;
1831                                         start++;
1832                                 }
1833                         }
1834                         scr_writew(c, d);
1835                         console_conditional_schedule();
1836                         s++;
1837                         d++;
1838                 } while (s < le);
1839                 if (s > start)
1840                         fbcon_putcs(vc, start, s - start, line, x);
1841                 console_conditional_schedule();
1842                 if (offset > 0)
1843                         line++;
1844                 else {
1845                         line--;
1846                         /* NOTE: We subtract two lines from these pointers */
1847                         s -= vc->vc_size_row;
1848                         d -= vc->vc_size_row;
1849                 }
1850         }
1851 }
1852
1853 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1854                                        int count)
1855 {
1856         unsigned short *p;
1857
1858         if (vc->vc_num != fg_console)
1859                 return;
1860         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1861
1862         while (count) {
1863                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1864                 count--;
1865                 p = advance_row(p, 1);
1866                 softback_in += vc->vc_size_row;
1867                 if (softback_in == softback_end)
1868                         softback_in = softback_buf;
1869                 if (softback_in == softback_top) {
1870                         softback_top += vc->vc_size_row;
1871                         if (softback_top == softback_end)
1872                                 softback_top = softback_buf;
1873                 }
1874         }
1875         softback_curr = softback_in;
1876 }
1877
1878 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1879                 enum con_scroll dir, unsigned int count)
1880 {
1881         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1882         struct fbcon_display *p = &fb_display[vc->vc_num];
1883         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1884
1885         if (fbcon_is_inactive(vc, info))
1886                 return true;
1887
1888         fbcon_cursor(vc, CM_ERASE);
1889
1890         /*
1891          * ++Geert: Only use ywrap/ypan if the console is in text mode
1892          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1893          *           whole screen (prevents flicker).
1894          */
1895
1896         switch (dir) {
1897         case SM_UP:
1898                 if (count > vc->vc_rows)        /* Maximum realistic size */
1899                         count = vc->vc_rows;
1900                 if (softback_top)
1901                         fbcon_softback_note(vc, t, count);
1902                 if (logo_shown >= 0)
1903                         goto redraw_up;
1904                 switch (p->scrollmode) {
1905                 case SCROLL_MOVE:
1906                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1907                                      count);
1908                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1909                         scr_memsetw((unsigned short *) (vc->vc_origin +
1910                                                         vc->vc_size_row *
1911                                                         (b - count)),
1912                                     vc->vc_video_erase_char,
1913                                     vc->vc_size_row * count);
1914                         return true;
1915                         break;
1916
1917                 case SCROLL_WRAP_MOVE:
1918                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1919                                 if (t > 0)
1920                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1921                                                     vc->vc_cols);
1922                                 ywrap_up(vc, count);
1923                                 if (vc->vc_rows - b > 0)
1924                                         fbcon_bmove(vc, b - count, 0, b, 0,
1925                                                     vc->vc_rows - b,
1926                                                     vc->vc_cols);
1927                         } else if (info->flags & FBINFO_READS_FAST)
1928                                 fbcon_bmove(vc, t + count, 0, t, 0,
1929                                             b - t - count, vc->vc_cols);
1930                         else
1931                                 goto redraw_up;
1932                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1933                         break;
1934
1935                 case SCROLL_PAN_REDRAW:
1936                         if ((p->yscroll + count <=
1937                              2 * (p->vrows - vc->vc_rows))
1938                             && ((!scroll_partial && (b - t == vc->vc_rows))
1939                                 || (scroll_partial
1940                                     && (b - t - count >
1941                                         3 * vc->vc_rows >> 2)))) {
1942                                 if (t > 0)
1943                                         fbcon_redraw_move(vc, p, 0, t, count);
1944                                 ypan_up_redraw(vc, t, count);
1945                                 if (vc->vc_rows - b > 0)
1946                                         fbcon_redraw_move(vc, p, b,
1947                                                           vc->vc_rows - b, b);
1948                         } else
1949                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1950                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1951                         break;
1952
1953                 case SCROLL_PAN_MOVE:
1954                         if ((p->yscroll + count <=
1955                              2 * (p->vrows - vc->vc_rows))
1956                             && ((!scroll_partial && (b - t == vc->vc_rows))
1957                                 || (scroll_partial
1958                                     && (b - t - count >
1959                                         3 * vc->vc_rows >> 2)))) {
1960                                 if (t > 0)
1961                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1962                                                     vc->vc_cols);
1963                                 ypan_up(vc, count);
1964                                 if (vc->vc_rows - b > 0)
1965                                         fbcon_bmove(vc, b - count, 0, b, 0,
1966                                                     vc->vc_rows - b,
1967                                                     vc->vc_cols);
1968                         } else if (info->flags & FBINFO_READS_FAST)
1969                                 fbcon_bmove(vc, t + count, 0, t, 0,
1970                                             b - t - count, vc->vc_cols);
1971                         else
1972                                 goto redraw_up;
1973                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1974                         break;
1975
1976                 case SCROLL_REDRAW:
1977                       redraw_up:
1978                         fbcon_redraw(vc, p, t, b - t - count,
1979                                      count * vc->vc_cols);
1980                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1981                         scr_memsetw((unsigned short *) (vc->vc_origin +
1982                                                         vc->vc_size_row *
1983                                                         (b - count)),
1984                                     vc->vc_video_erase_char,
1985                                     vc->vc_size_row * count);
1986                         return true;
1987                 }
1988                 break;
1989
1990         case SM_DOWN:
1991                 if (count > vc->vc_rows)        /* Maximum realistic size */
1992                         count = vc->vc_rows;
1993                 if (logo_shown >= 0)
1994                         goto redraw_down;
1995                 switch (p->scrollmode) {
1996                 case SCROLL_MOVE:
1997                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1998                                      -count);
1999                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2000                         scr_memsetw((unsigned short *) (vc->vc_origin +
2001                                                         vc->vc_size_row *
2002                                                         t),
2003                                     vc->vc_video_erase_char,
2004                                     vc->vc_size_row * count);
2005                         return true;
2006                         break;
2007
2008                 case SCROLL_WRAP_MOVE:
2009                         if (b - t - count > 3 * vc->vc_rows >> 2) {
2010                                 if (vc->vc_rows - b > 0)
2011                                         fbcon_bmove(vc, b, 0, b - count, 0,
2012                                                     vc->vc_rows - b,
2013                                                     vc->vc_cols);
2014                                 ywrap_down(vc, count);
2015                                 if (t > 0)
2016                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2017                                                     vc->vc_cols);
2018                         } else if (info->flags & FBINFO_READS_FAST)
2019                                 fbcon_bmove(vc, t, 0, t + count, 0,
2020                                             b - t - count, vc->vc_cols);
2021                         else
2022                                 goto redraw_down;
2023                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2024                         break;
2025
2026                 case SCROLL_PAN_MOVE:
2027                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2028                             && ((!scroll_partial && (b - t == vc->vc_rows))
2029                                 || (scroll_partial
2030                                     && (b - t - count >
2031                                         3 * vc->vc_rows >> 2)))) {
2032                                 if (vc->vc_rows - b > 0)
2033                                         fbcon_bmove(vc, b, 0, b - count, 0,
2034                                                     vc->vc_rows - b,
2035                                                     vc->vc_cols);
2036                                 ypan_down(vc, count);
2037                                 if (t > 0)
2038                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2039                                                     vc->vc_cols);
2040                         } else if (info->flags & FBINFO_READS_FAST)
2041                                 fbcon_bmove(vc, t, 0, t + count, 0,
2042                                             b - t - count, vc->vc_cols);
2043                         else
2044                                 goto redraw_down;
2045                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2046                         break;
2047
2048                 case SCROLL_PAN_REDRAW:
2049                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2050                             && ((!scroll_partial && (b - t == vc->vc_rows))
2051                                 || (scroll_partial
2052                                     && (b - t - count >
2053                                         3 * vc->vc_rows >> 2)))) {
2054                                 if (vc->vc_rows - b > 0)
2055                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2056                                                           b - count);
2057                                 ypan_down_redraw(vc, t, count);
2058                                 if (t > 0)
2059                                         fbcon_redraw_move(vc, p, count, t, 0);
2060                         } else
2061                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2062                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2063                         break;
2064
2065                 case SCROLL_REDRAW:
2066                       redraw_down:
2067                         fbcon_redraw(vc, p, b - 1, b - t - count,
2068                                      -count * vc->vc_cols);
2069                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2070                         scr_memsetw((unsigned short *) (vc->vc_origin +
2071                                                         vc->vc_size_row *
2072                                                         t),
2073                                     vc->vc_video_erase_char,
2074                                     vc->vc_size_row * count);
2075                         return true;
2076                 }
2077         }
2078         return false;
2079 }
2080
2081
2082 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2083                         int height, int width)
2084 {
2085         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2086         struct fbcon_display *p = &fb_display[vc->vc_num];
2087
2088         if (fbcon_is_inactive(vc, info))
2089                 return;
2090
2091         if (!width || !height)
2092                 return;
2093
2094         /*  Split blits that cross physical y_wrap case.
2095          *  Pathological case involves 4 blits, better to use recursive
2096          *  code rather than unrolled case
2097          *
2098          *  Recursive invocations don't need to erase the cursor over and
2099          *  over again, so we use fbcon_bmove_rec()
2100          */
2101         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2102                         p->vrows - p->yscroll);
2103 }
2104
2105 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
2106                             int dy, int dx, int height, int width, u_int y_break)
2107 {
2108         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2109         struct fbcon_ops *ops = info->fbcon_par;
2110         u_int b;
2111
2112         if (sy < y_break && sy + height > y_break) {
2113                 b = y_break - sy;
2114                 if (dy < sy) {  /* Avoid trashing self */
2115                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2116                                         y_break);
2117                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2118                                         height - b, width, y_break);
2119                 } else {
2120                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2121                                         height - b, width, y_break);
2122                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2123                                         y_break);
2124                 }
2125                 return;
2126         }
2127
2128         if (dy < y_break && dy + height > y_break) {
2129                 b = y_break - dy;
2130                 if (dy < sy) {  /* Avoid trashing self */
2131                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2132                                         y_break);
2133                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2134                                         height - b, width, y_break);
2135                 } else {
2136                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2137                                         height - b, width, y_break);
2138                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2139                                         y_break);
2140                 }
2141                 return;
2142         }
2143         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2144                    height, width);
2145 }
2146
2147 static void updatescrollmode(struct fbcon_display *p,
2148                                         struct fb_info *info,
2149                                         struct vc_data *vc)
2150 {
2151         struct fbcon_ops *ops = info->fbcon_par;
2152         int fh = vc->vc_font.height;
2153         int cap = info->flags;
2154         u16 t = 0;
2155         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2156                                   info->fix.xpanstep);
2157         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2158         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2159         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2160                                    info->var.xres_virtual);
2161         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2162                 divides(ypan, vc->vc_font.height) && vyres > yres;
2163         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2164                 divides(ywrap, vc->vc_font.height) &&
2165                 divides(vc->vc_font.height, vyres) &&
2166                 divides(vc->vc_font.height, yres);
2167         int reading_fast = cap & FBINFO_READS_FAST;
2168         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2169                 !(cap & FBINFO_HWACCEL_DISABLED);
2170         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2171                 !(cap & FBINFO_HWACCEL_DISABLED);
2172
2173         p->vrows = vyres/fh;
2174         if (yres > (fh * (vc->vc_rows + 1)))
2175                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2176         if ((yres % fh) && (vyres % fh < yres % fh))
2177                 p->vrows--;
2178
2179         if (good_wrap || good_pan) {
2180                 if (reading_fast || fast_copyarea)
2181                         p->scrollmode = good_wrap ?
2182                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2183                 else
2184                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2185                                 SCROLL_PAN_REDRAW;
2186         } else {
2187                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2188                         p->scrollmode = SCROLL_MOVE;
2189                 else
2190                         p->scrollmode = SCROLL_REDRAW;
2191         }
2192 }
2193
2194 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2195                         unsigned int height, unsigned int user)
2196 {
2197         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2198         struct fbcon_ops *ops = info->fbcon_par;
2199         struct fbcon_display *p = &fb_display[vc->vc_num];
2200         struct fb_var_screeninfo var = info->var;
2201         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2202
2203         virt_w = FBCON_SWAP(ops->rotate, width, height);
2204         virt_h = FBCON_SWAP(ops->rotate, height, width);
2205         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2206                                  vc->vc_font.height);
2207         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2208                                  vc->vc_font.width);
2209         var.xres = virt_w * virt_fw;
2210         var.yres = virt_h * virt_fh;
2211         x_diff = info->var.xres - var.xres;
2212         y_diff = info->var.yres - var.yres;
2213         if (x_diff < 0 || x_diff > virt_fw ||
2214             y_diff < 0 || y_diff > virt_fh) {
2215                 const struct fb_videomode *mode;
2216
2217                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2218                 mode = fb_find_best_mode(&var, &info->modelist);
2219                 if (mode == NULL)
2220                         return -EINVAL;
2221                 display_to_var(&var, p);
2222                 fb_videomode_to_var(&var, mode);
2223
2224                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2225                         return -EINVAL;
2226
2227                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2228                 if (con_is_visible(vc)) {
2229                         var.activate = FB_ACTIVATE_NOW |
2230                                 FB_ACTIVATE_FORCE;
2231                         fb_set_var(info, &var);
2232                 }
2233                 var_to_display(p, &info->var, info);
2234                 ops->var = info->var;
2235         }
2236         updatescrollmode(p, info, vc);
2237         return 0;
2238 }
2239
2240 static int fbcon_switch(struct vc_data *vc)
2241 {
2242         struct fb_info *info, *old_info = NULL;
2243         struct fbcon_ops *ops;
2244         struct fbcon_display *p = &fb_display[vc->vc_num];
2245         struct fb_var_screeninfo var;
2246         int i, ret, prev_console, charcnt = 256;
2247
2248         info = registered_fb[con2fb_map[vc->vc_num]];
2249         ops = info->fbcon_par;
2250
2251         if (softback_top) {
2252                 if (softback_lines)
2253                         fbcon_set_origin(vc);
2254                 softback_top = softback_curr = softback_in = softback_buf;
2255                 softback_lines = 0;
2256                 fbcon_update_softback(vc);
2257         }
2258
2259         if (logo_shown >= 0) {
2260                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2261
2262                 if (conp2->vc_top == logo_lines
2263                     && conp2->vc_bottom == conp2->vc_rows)
2264                         conp2->vc_top = 0;
2265                 logo_shown = FBCON_LOGO_CANSHOW;
2266         }
2267
2268         prev_console = ops->currcon;
2269         if (prev_console != -1)
2270                 old_info = registered_fb[con2fb_map[prev_console]];
2271         /*
2272          * FIXME: If we have multiple fbdev's loaded, we need to
2273          * update all info->currcon.  Perhaps, we can place this
2274          * in a centralized structure, but this might break some
2275          * drivers.
2276          *
2277          * info->currcon = vc->vc_num;
2278          */
2279         for_each_registered_fb(i) {
2280                 if (registered_fb[i]->fbcon_par) {
2281                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2282
2283                         o->currcon = vc->vc_num;
2284                 }
2285         }
2286         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2287         display_to_var(&var, p);
2288         var.activate = FB_ACTIVATE_NOW;
2289
2290         /*
2291          * make sure we don't unnecessarily trip the memcmp()
2292          * in fb_set_var()
2293          */
2294         info->var.activate = var.activate;
2295         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2296         fb_set_var(info, &var);
2297         ops->var = info->var;
2298
2299         if (old_info != NULL && (old_info != info ||
2300                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2301                 if (info->fbops->fb_set_par) {
2302                         ret = info->fbops->fb_set_par(info);
2303
2304                         if (ret)
2305                                 printk(KERN_ERR "fbcon_switch: detected "
2306                                         "unhandled fb_set_par error, "
2307                                         "error code %d\n", ret);
2308                 }
2309
2310                 if (old_info != info)
2311                         fbcon_del_cursor_timer(old_info);
2312         }
2313
2314         if (fbcon_is_inactive(vc, info) ||
2315             ops->blank_state != FB_BLANK_UNBLANK)
2316                 fbcon_del_cursor_timer(info);
2317         else
2318                 fbcon_add_cursor_timer(info);
2319
2320         set_blitting_type(vc, info);
2321         ops->cursor_reset = 1;
2322
2323         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2324                 ops->rotate = FB_ROTATE_UR;
2325                 set_blitting_type(vc, info);
2326         }
2327
2328         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2329         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2330
2331         if (p->userfont)
2332                 charcnt = FNTCHARCNT(vc->vc_font.data);
2333
2334         if (charcnt > 256)
2335                 vc->vc_complement_mask <<= 1;
2336
2337         updatescrollmode(p, info, vc);
2338
2339         switch (p->scrollmode) {
2340         case SCROLL_WRAP_MOVE:
2341                 scrollback_phys_max = p->vrows - vc->vc_rows;
2342                 break;
2343         case SCROLL_PAN_MOVE:
2344         case SCROLL_PAN_REDRAW:
2345                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2346                 if (scrollback_phys_max < 0)
2347                         scrollback_phys_max = 0;
2348                 break;
2349         default:
2350                 scrollback_phys_max = 0;
2351                 break;
2352         }
2353
2354         scrollback_max = 0;
2355         scrollback_current = 0;
2356
2357         if (!fbcon_is_inactive(vc, info)) {
2358             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2359             ops->update_start(info);
2360         }
2361
2362         fbcon_set_palette(vc, color_table);
2363         fbcon_clear_margins(vc, 0);
2364
2365         if (logo_shown == FBCON_LOGO_DRAW) {
2366
2367                 logo_shown = fg_console;
2368                 /* This is protected above by initmem_freed */
2369                 fb_show_logo(info, ops->rotate);
2370                 update_region(vc,
2371                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2372                               vc->vc_size_row * (vc->vc_bottom -
2373                                                  vc->vc_top) / 2);
2374                 return 0;
2375         }
2376         return 1;
2377 }
2378
2379 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2380                                 int blank)
2381 {
2382         if (blank) {
2383                 unsigned short charmask = vc->vc_hi_font_mask ?
2384                         0x1ff : 0xff;
2385                 unsigned short oldc;
2386
2387                 oldc = vc->vc_video_erase_char;
2388                 vc->vc_video_erase_char &= charmask;
2389                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2390                 vc->vc_video_erase_char = oldc;
2391         }
2392 }
2393
2394 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2395 {
2396         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2397         struct fbcon_ops *ops = info->fbcon_par;
2398
2399         if (mode_switch) {
2400                 struct fb_var_screeninfo var = info->var;
2401
2402                 ops->graphics = 1;
2403
2404                 if (!blank) {
2405                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE |
2406                                 FB_ACTIVATE_KD_TEXT;
2407                         fb_set_var(info, &var);
2408                         ops->graphics = 0;
2409                         ops->var = info->var;
2410                 }
2411         }
2412
2413         if (!fbcon_is_inactive(vc, info)) {
2414                 if (ops->blank_state != blank) {
2415                         ops->blank_state = blank;
2416                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2417                         ops->cursor_flash = (!blank);
2418
2419                         if (fb_blank(info, blank))
2420                                 fbcon_generic_blank(vc, info, blank);
2421                 }
2422
2423                 if (!blank)
2424                         update_screen(vc);
2425         }
2426
2427         if (mode_switch || fbcon_is_inactive(vc, info) ||
2428             ops->blank_state != FB_BLANK_UNBLANK)
2429                 fbcon_del_cursor_timer(info);
2430         else
2431                 fbcon_add_cursor_timer(info);
2432
2433         return 0;
2434 }
2435
2436 static int fbcon_debug_enter(struct vc_data *vc)
2437 {
2438         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2439         struct fbcon_ops *ops = info->fbcon_par;
2440
2441         ops->save_graphics = ops->graphics;
2442         ops->graphics = 0;
2443         if (info->fbops->fb_debug_enter)
2444                 info->fbops->fb_debug_enter(info);
2445         fbcon_set_palette(vc, color_table);
2446         return 0;
2447 }
2448
2449 static int fbcon_debug_leave(struct vc_data *vc)
2450 {
2451         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2452         struct fbcon_ops *ops = info->fbcon_par;
2453
2454         ops->graphics = ops->save_graphics;
2455         if (info->fbops->fb_debug_leave)
2456                 info->fbops->fb_debug_leave(info);
2457         return 0;
2458 }
2459
2460 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2461 {
2462         u8 *fontdata = vc->vc_font.data;
2463         u8 *data = font->data;
2464         int i, j;
2465
2466         font->width = vc->vc_font.width;
2467         font->height = vc->vc_font.height;
2468         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2469         if (!font->data)
2470                 return 0;
2471
2472         if (font->width <= 8) {
2473                 j = vc->vc_font.height;
2474                 for (i = 0; i < font->charcount; i++) {
2475                         memcpy(data, fontdata, j);
2476                         memset(data + j, 0, 32 - j);
2477                         data += 32;
2478                         fontdata += j;
2479                 }
2480         } else if (font->width <= 16) {
2481                 j = vc->vc_font.height * 2;
2482                 for (i = 0; i < font->charcount; i++) {
2483                         memcpy(data, fontdata, j);
2484                         memset(data + j, 0, 64 - j);
2485                         data += 64;
2486                         fontdata += j;
2487                 }
2488         } else if (font->width <= 24) {
2489                 for (i = 0; i < font->charcount; i++) {
2490                         for (j = 0; j < vc->vc_font.height; j++) {
2491                                 *data++ = fontdata[0];
2492                                 *data++ = fontdata[1];
2493                                 *data++ = fontdata[2];
2494                                 fontdata += sizeof(u32);
2495                         }
2496                         memset(data, 0, 3 * (32 - j));
2497                         data += 3 * (32 - j);
2498                 }
2499         } else {
2500                 j = vc->vc_font.height * 4;
2501                 for (i = 0; i < font->charcount; i++) {
2502                         memcpy(data, fontdata, j);
2503                         memset(data + j, 0, 128 - j);
2504                         data += 128;
2505                         fontdata += j;
2506                 }
2507         }
2508         return 0;
2509 }
2510
2511 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2512 static void set_vc_hi_font(struct vc_data *vc, bool set)
2513 {
2514         if (!set) {
2515                 vc->vc_hi_font_mask = 0;
2516                 if (vc->vc_can_do_color) {
2517                         vc->vc_complement_mask >>= 1;
2518                         vc->vc_s_complement_mask >>= 1;
2519                 }
2520
2521                 /* ++Edmund: reorder the attribute bits */
2522                 if (vc->vc_can_do_color) {
2523                         unsigned short *cp =
2524                             (unsigned short *) vc->vc_origin;
2525                         int count = vc->vc_screenbuf_size / 2;
2526                         unsigned short c;
2527                         for (; count > 0; count--, cp++) {
2528                                 c = scr_readw(cp);
2529                                 scr_writew(((c & 0xfe00) >> 1) |
2530                                            (c & 0xff), cp);
2531                         }
2532                         c = vc->vc_video_erase_char;
2533                         vc->vc_video_erase_char =
2534                             ((c & 0xfe00) >> 1) | (c & 0xff);
2535                         vc->vc_attr >>= 1;
2536                 }
2537         } else {
2538                 vc->vc_hi_font_mask = 0x100;
2539                 if (vc->vc_can_do_color) {
2540                         vc->vc_complement_mask <<= 1;
2541                         vc->vc_s_complement_mask <<= 1;
2542                 }
2543
2544                 /* ++Edmund: reorder the attribute bits */
2545                 {
2546                         unsigned short *cp =
2547                             (unsigned short *) vc->vc_origin;
2548                         int count = vc->vc_screenbuf_size / 2;
2549                         unsigned short c;
2550                         for (; count > 0; count--, cp++) {
2551                                 unsigned short newc;
2552                                 c = scr_readw(cp);
2553                                 if (vc->vc_can_do_color)
2554                                         newc =
2555                                             ((c & 0xff00) << 1) | (c &
2556                                                                    0xff);
2557                                 else
2558                                         newc = c & ~0x100;
2559                                 scr_writew(newc, cp);
2560                         }
2561                         c = vc->vc_video_erase_char;
2562                         if (vc->vc_can_do_color) {
2563                                 vc->vc_video_erase_char =
2564                                     ((c & 0xff00) << 1) | (c & 0xff);
2565                                 vc->vc_attr <<= 1;
2566                         } else
2567                                 vc->vc_video_erase_char = c & ~0x100;
2568                 }
2569         }
2570 }
2571
2572 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2573                              const u8 * data, int userfont)
2574 {
2575         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2576         struct fbcon_ops *ops = info->fbcon_par;
2577         struct fbcon_display *p = &fb_display[vc->vc_num];
2578         int resize;
2579         int cnt;
2580         char *old_data = NULL;
2581
2582         if (con_is_visible(vc) && softback_lines)
2583                 fbcon_set_origin(vc);
2584
2585         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2586         if (p->userfont)
2587                 old_data = vc->vc_font.data;
2588         if (userfont)
2589                 cnt = FNTCHARCNT(data);
2590         else
2591                 cnt = 256;
2592         vc->vc_font.data = (void *)(p->fontdata = data);
2593         if ((p->userfont = userfont))
2594                 REFCOUNT(data)++;
2595         vc->vc_font.width = w;
2596         vc->vc_font.height = h;
2597         if (vc->vc_hi_font_mask && cnt == 256)
2598                 set_vc_hi_font(vc, false);
2599         else if (!vc->vc_hi_font_mask && cnt == 512)
2600                 set_vc_hi_font(vc, true);
2601
2602         if (resize) {
2603                 int cols, rows;
2604
2605                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2606                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2607                 cols /= w;
2608                 rows /= h;
2609                 vc_resize(vc, cols, rows);
2610                 if (con_is_visible(vc) && softback_buf)
2611                         fbcon_update_softback(vc);
2612         } else if (con_is_visible(vc)
2613                    && vc->vc_mode == KD_TEXT) {
2614                 fbcon_clear_margins(vc, 0);
2615                 update_screen(vc);
2616         }
2617
2618         if (old_data && (--REFCOUNT(old_data) == 0))
2619                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2620         return 0;
2621 }
2622
2623 static int fbcon_copy_font(struct vc_data *vc, int con)
2624 {
2625         struct fbcon_display *od = &fb_display[con];
2626         struct console_font *f = &vc->vc_font;
2627
2628         if (od->fontdata == f->data)
2629                 return 0;       /* already the same font... */
2630         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2631 }
2632
2633 /*
2634  *  User asked to set font; we are guaranteed that
2635  *      a) width and height are in range 1..32
2636  *      b) charcount does not exceed 512
2637  *  but lets not assume that, since someone might someday want to use larger
2638  *  fonts. And charcount of 512 is small for unicode support.
2639  *
2640  *  However, user space gives the font in 32 rows , regardless of
2641  *  actual font height. So a new API is needed if support for larger fonts
2642  *  is ever implemented.
2643  */
2644
2645 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2646                           unsigned int flags)
2647 {
2648         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2649         unsigned charcount = font->charcount;
2650         int w = font->width;
2651         int h = font->height;
2652         int size;
2653         int i, csum;
2654         u8 *new_data, *data = font->data;
2655         int pitch = (font->width+7) >> 3;
2656
2657         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2658          * If not this check should be changed to charcount < 256 */
2659         if (charcount != 256 && charcount != 512)
2660                 return -EINVAL;
2661
2662         /* Make sure drawing engine can handle the font */
2663         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2664             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2665                 return -EINVAL;
2666
2667         /* Make sure driver can handle the font length */
2668         if (fbcon_invalid_charcount(info, charcount))
2669                 return -EINVAL;
2670
2671         size = h * pitch * charcount;
2672
2673         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2674
2675         if (!new_data)
2676                 return -ENOMEM;
2677
2678         new_data += FONT_EXTRA_WORDS * sizeof(int);
2679         FNTSIZE(new_data) = size;
2680         FNTCHARCNT(new_data) = charcount;
2681         REFCOUNT(new_data) = 0; /* usage counter */
2682         for (i=0; i< charcount; i++) {
2683                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2684         }
2685
2686         /* Since linux has a nice crc32 function use it for counting font
2687          * checksums. */
2688         csum = crc32(0, new_data, size);
2689
2690         FNTSUM(new_data) = csum;
2691         /* Check if the same font is on some other console already */
2692         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2693                 struct vc_data *tmp = vc_cons[i].d;
2694
2695                 if (fb_display[i].userfont &&
2696                     fb_display[i].fontdata &&
2697                     FNTSUM(fb_display[i].fontdata) == csum &&
2698                     FNTSIZE(fb_display[i].fontdata) == size &&
2699                     tmp->vc_font.width == w &&
2700                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2701                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2702                         new_data = (u8 *)fb_display[i].fontdata;
2703                         break;
2704                 }
2705         }
2706         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2707 }
2708
2709 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2710 {
2711         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2712         const struct font_desc *f;
2713
2714         if (!name)
2715                 f = get_default_font(info->var.xres, info->var.yres,
2716                                      info->pixmap.blit_x, info->pixmap.blit_y);
2717         else if (!(f = find_font(name)))
2718                 return -ENOENT;
2719
2720         font->width = f->width;
2721         font->height = f->height;
2722         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2723 }
2724
2725 static u16 palette_red[16];
2726 static u16 palette_green[16];
2727 static u16 palette_blue[16];
2728
2729 static struct fb_cmap palette_cmap = {
2730         0, 16, palette_red, palette_green, palette_blue, NULL
2731 };
2732
2733 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2734 {
2735         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2736         int i, j, k, depth;
2737         u8 val;
2738
2739         if (fbcon_is_inactive(vc, info))
2740                 return;
2741
2742         if (!con_is_visible(vc))
2743                 return;
2744
2745         depth = fb_get_color_depth(&info->var, &info->fix);
2746         if (depth > 3) {
2747                 for (i = j = 0; i < 16; i++) {
2748                         k = table[i];
2749                         val = vc->vc_palette[j++];
2750                         palette_red[k] = (val << 8) | val;
2751                         val = vc->vc_palette[j++];
2752                         palette_green[k] = (val << 8) | val;
2753                         val = vc->vc_palette[j++];
2754                         palette_blue[k] = (val << 8) | val;
2755                 }
2756                 palette_cmap.len = 16;
2757                 palette_cmap.start = 0;
2758         /*
2759          * If framebuffer is capable of less than 16 colors,
2760          * use default palette of fbcon.
2761          */
2762         } else
2763                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2764
2765         fb_set_cmap(&palette_cmap, info);
2766 }
2767
2768 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2769 {
2770         unsigned long p;
2771         int line;
2772
2773         if (vc->vc_num != fg_console || !softback_lines)
2774                 return (u16 *) (vc->vc_origin + offset);
2775         line = offset / vc->vc_size_row;
2776         if (line >= softback_lines)
2777                 return (u16 *) (vc->vc_origin + offset -
2778                                 softback_lines * vc->vc_size_row);
2779         p = softback_curr + offset;
2780         if (p >= softback_end)
2781                 p += softback_buf - softback_end;
2782         return (u16 *) p;
2783 }
2784
2785 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2786                                  int *px, int *py)
2787 {
2788         unsigned long ret;
2789         int x, y;
2790
2791         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2792                 unsigned long offset = (pos - vc->vc_origin) / 2;
2793
2794                 x = offset % vc->vc_cols;
2795                 y = offset / vc->vc_cols;
2796                 if (vc->vc_num == fg_console)
2797                         y += softback_lines;
2798                 ret = pos + (vc->vc_cols - x) * 2;
2799         } else if (vc->vc_num == fg_console && softback_lines) {
2800                 unsigned long offset = pos - softback_curr;
2801
2802                 if (pos < softback_curr)
2803                         offset += softback_end - softback_buf;
2804                 offset /= 2;
2805                 x = offset % vc->vc_cols;
2806                 y = offset / vc->vc_cols;
2807                 ret = pos + (vc->vc_cols - x) * 2;
2808                 if (ret == softback_end)
2809                         ret = softback_buf;
2810                 if (ret == softback_in)
2811                         ret = vc->vc_origin;
2812         } else {
2813                 /* Should not happen */
2814                 x = y = 0;
2815                 ret = vc->vc_origin;
2816         }
2817         if (px)
2818                 *px = x;
2819         if (py)
2820                 *py = y;
2821         return ret;
2822 }
2823
2824 /* As we might be inside of softback, we may work with non-contiguous buffer,
2825    that's why we have to use a separate routine. */
2826 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2827 {
2828         while (cnt--) {
2829                 u16 a = scr_readw(p);
2830                 if (!vc->vc_can_do_color)
2831                         a ^= 0x0800;
2832                 else if (vc->vc_hi_font_mask == 0x100)
2833                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2834                             (((a) & 0x0e00) << 4);
2835                 else
2836                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2837                             (((a) & 0x0700) << 4);
2838                 scr_writew(a, p++);
2839                 if (p == (u16 *) softback_end)
2840                         p = (u16 *) softback_buf;
2841                 if (p == (u16 *) softback_in)
2842                         p = (u16 *) vc->vc_origin;
2843         }
2844 }
2845
2846 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2847 {
2848         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2849         struct fbcon_ops *ops = info->fbcon_par;
2850         struct fbcon_display *disp = &fb_display[fg_console];
2851         int offset, limit, scrollback_old;
2852
2853         if (softback_top) {
2854                 if (vc->vc_num != fg_console)
2855                         return;
2856                 if (vc->vc_mode != KD_TEXT || !lines)
2857                         return;
2858                 if (logo_shown >= 0) {
2859                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2860
2861                         if (conp2->vc_top == logo_lines
2862                             && conp2->vc_bottom == conp2->vc_rows)
2863                                 conp2->vc_top = 0;
2864                         if (logo_shown == vc->vc_num) {
2865                                 unsigned long p, q;
2866                                 int i;
2867
2868                                 p = softback_in;
2869                                 q = vc->vc_origin +
2870                                     logo_lines * vc->vc_size_row;
2871                                 for (i = 0; i < logo_lines; i++) {
2872                                         if (p == softback_top)
2873                                                 break;
2874                                         if (p == softback_buf)
2875                                                 p = softback_end;
2876                                         p -= vc->vc_size_row;
2877                                         q -= vc->vc_size_row;
2878                                         scr_memcpyw((u16 *) q, (u16 *) p,
2879                                                     vc->vc_size_row);
2880                                 }
2881                                 softback_in = softback_curr = p;
2882                                 update_region(vc, vc->vc_origin,
2883                                               logo_lines * vc->vc_cols);
2884                         }
2885                         logo_shown = FBCON_LOGO_CANSHOW;
2886                 }
2887                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2888                 fbcon_redraw_softback(vc, disp, lines);
2889                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2890                 return;
2891         }
2892
2893         if (!scrollback_phys_max)
2894                 return;
2895
2896         scrollback_old = scrollback_current;
2897         scrollback_current -= lines;
2898         if (scrollback_current < 0)
2899                 scrollback_current = 0;
2900         else if (scrollback_current > scrollback_max)
2901                 scrollback_current = scrollback_max;
2902         if (scrollback_current == scrollback_old)
2903                 return;
2904
2905         if (fbcon_is_inactive(vc, info))
2906                 return;
2907
2908         fbcon_cursor(vc, CM_ERASE);
2909
2910         offset = disp->yscroll - scrollback_current;
2911         limit = disp->vrows;
2912         switch (disp->scrollmode) {
2913         case SCROLL_WRAP_MOVE:
2914                 info->var.vmode |= FB_VMODE_YWRAP;
2915                 break;
2916         case SCROLL_PAN_MOVE:
2917         case SCROLL_PAN_REDRAW:
2918                 limit -= vc->vc_rows;
2919                 info->var.vmode &= ~FB_VMODE_YWRAP;
2920                 break;
2921         }
2922         if (offset < 0)
2923                 offset += limit;
2924         else if (offset >= limit)
2925                 offset -= limit;
2926
2927         ops->var.xoffset = 0;
2928         ops->var.yoffset = offset * vc->vc_font.height;
2929         ops->update_start(info);
2930
2931         if (!scrollback_current)
2932                 fbcon_cursor(vc, CM_DRAW);
2933 }
2934
2935 static int fbcon_set_origin(struct vc_data *vc)
2936 {
2937         if (softback_lines)
2938                 fbcon_scrolldelta(vc, softback_lines);
2939         return 0;
2940 }
2941
2942 void fbcon_suspended(struct fb_info *info)
2943 {
2944         struct vc_data *vc = NULL;
2945         struct fbcon_ops *ops = info->fbcon_par;
2946
2947         if (!ops || ops->currcon < 0)
2948                 return;
2949         vc = vc_cons[ops->currcon].d;
2950
2951         /* Clear cursor, restore saved data */
2952         fbcon_cursor(vc, CM_ERASE);
2953 }
2954
2955 void fbcon_resumed(struct fb_info *info)
2956 {
2957         struct vc_data *vc;
2958         struct fbcon_ops *ops = info->fbcon_par;
2959
2960         if (!ops || ops->currcon < 0)
2961                 return;
2962         vc = vc_cons[ops->currcon].d;
2963
2964         update_screen(vc);
2965 }
2966
2967 static void fbcon_modechanged(struct fb_info *info)
2968 {
2969         struct fbcon_ops *ops = info->fbcon_par;
2970         struct vc_data *vc;
2971         struct fbcon_display *p;
2972         int rows, cols;
2973
2974         if (!ops || ops->currcon < 0)
2975                 return;
2976         vc = vc_cons[ops->currcon].d;
2977         if (vc->vc_mode != KD_TEXT ||
2978             registered_fb[con2fb_map[ops->currcon]] != info)
2979                 return;
2980
2981         p = &fb_display[vc->vc_num];
2982         set_blitting_type(vc, info);
2983
2984         if (con_is_visible(vc)) {
2985                 var_to_display(p, &info->var, info);
2986                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2987                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2988                 cols /= vc->vc_font.width;
2989                 rows /= vc->vc_font.height;
2990                 vc_resize(vc, cols, rows);
2991                 updatescrollmode(p, info, vc);
2992                 scrollback_max = 0;
2993                 scrollback_current = 0;
2994
2995                 if (!fbcon_is_inactive(vc, info)) {
2996                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2997                     ops->update_start(info);
2998                 }
2999
3000                 fbcon_set_palette(vc, color_table);
3001                 update_screen(vc);
3002                 if (softback_buf)
3003                         fbcon_update_softback(vc);
3004         }
3005 }
3006
3007 static void fbcon_set_all_vcs(struct fb_info *info)
3008 {
3009         struct fbcon_ops *ops = info->fbcon_par;
3010         struct vc_data *vc;
3011         struct fbcon_display *p;
3012         int i, rows, cols, fg = -1;
3013
3014         if (!ops || ops->currcon < 0)
3015                 return;
3016
3017         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3018                 vc = vc_cons[i].d;
3019                 if (!vc || vc->vc_mode != KD_TEXT ||
3020                     registered_fb[con2fb_map[i]] != info)
3021                         continue;
3022
3023                 if (con_is_visible(vc)) {
3024                         fg = i;
3025                         continue;
3026                 }
3027
3028                 p = &fb_display[vc->vc_num];
3029                 set_blitting_type(vc, info);
3030                 var_to_display(p, &info->var, info);
3031                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
3032                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
3033                 cols /= vc->vc_font.width;
3034                 rows /= vc->vc_font.height;
3035                 vc_resize(vc, cols, rows);
3036         }
3037
3038         if (fg != -1)
3039                 fbcon_modechanged(info);
3040 }
3041
3042
3043 void fbcon_update_vcs(struct fb_info *info, bool all)
3044 {
3045         if (all)
3046                 fbcon_set_all_vcs(info);
3047         else
3048                 fbcon_modechanged(info);
3049 }
3050 EXPORT_SYMBOL(fbcon_update_vcs);
3051
3052 int fbcon_mode_deleted(struct fb_info *info,
3053                        struct fb_videomode *mode)
3054 {
3055         struct fb_info *fb_info;
3056         struct fbcon_display *p;
3057         int i, j, found = 0;
3058
3059         /* before deletion, ensure that mode is not in use */
3060         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3061                 j = con2fb_map[i];
3062                 if (j == -1)
3063                         continue;
3064                 fb_info = registered_fb[j];
3065                 if (fb_info != info)
3066                         continue;
3067                 p = &fb_display[i];
3068                 if (!p || !p->mode)
3069                         continue;
3070                 if (fb_mode_is_equal(p->mode, mode)) {
3071                         found = 1;
3072                         break;
3073                 }
3074         }
3075         return found;
3076 }
3077
3078 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3079 static void fbcon_unbind(void)
3080 {
3081         int ret;
3082
3083         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3084                                 fbcon_is_default);
3085
3086         if (!ret)
3087                 fbcon_has_console_bind = 0;
3088 }
3089 #else
3090 static inline void fbcon_unbind(void) {}
3091 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3092
3093 /* called with console_lock held */
3094 void fbcon_fb_unbind(struct fb_info *info)
3095 {
3096         int i, new_idx = -1, ret = 0;
3097         int idx = info->node;
3098
3099         WARN_CONSOLE_UNLOCKED();
3100
3101         if (!fbcon_has_console_bind)
3102                 return;
3103
3104         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3105                 if (con2fb_map[i] != idx &&
3106                     con2fb_map[i] != -1) {
3107                         new_idx = con2fb_map[i];
3108                         break;
3109                 }
3110         }
3111
3112         if (new_idx != -1) {
3113                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3114                         if (con2fb_map[i] == idx)
3115                                 set_con2fb_map(i, new_idx, 0);
3116                 }
3117         } else {
3118                 struct fb_info *info = registered_fb[idx];
3119
3120                 /* This is sort of like set_con2fb_map, except it maps
3121                  * the consoles to no device and then releases the
3122                  * oldinfo to free memory and cancel the cursor blink
3123                  * timer. I can imagine this just becoming part of
3124                  * set_con2fb_map where new_idx is -1
3125                  */
3126                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3127                         if (con2fb_map[i] == idx) {
3128                                 con2fb_map[i] = -1;
3129                                 if (!search_fb_in_map(idx)) {
3130                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3131                                                                      info, NULL, i,
3132                                                                      idx, 0);
3133                                         if (ret) {
3134                                                 con2fb_map[i] = idx;
3135                                                 return;
3136                                         }
3137                                 }
3138                         }
3139                 }
3140                 fbcon_unbind();
3141         }
3142 }
3143
3144 /* called with console_lock held */
3145 void fbcon_fb_unregistered(struct fb_info *info)
3146 {
3147         int i, idx;
3148
3149         WARN_CONSOLE_UNLOCKED();
3150
3151         if (deferred_takeover)
3152                 return;
3153
3154         idx = info->node;
3155         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3156                 if (con2fb_map[i] == idx)
3157                         con2fb_map[i] = -1;
3158         }
3159
3160         if (idx == info_idx) {
3161                 info_idx = -1;
3162
3163                 for_each_registered_fb(i) {
3164                         info_idx = i;
3165                         break;
3166                 }
3167         }
3168
3169         if (info_idx != -1) {
3170                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3171                         if (con2fb_map[i] == -1)
3172                                 con2fb_map[i] = info_idx;
3173                 }
3174         }
3175
3176         if (primary_device == idx)
3177                 primary_device = -1;
3178
3179         if (!num_registered_fb)
3180                 do_unregister_con_driver(&fb_con);
3181 }
3182
3183 void fbcon_remap_all(struct fb_info *info)
3184 {
3185         int i, idx = info->node;
3186
3187         console_lock();
3188         if (deferred_takeover) {
3189                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3190                         con2fb_map_boot[i] = idx;
3191                 fbcon_map_override();
3192                 console_unlock();
3193                 return;
3194         }
3195
3196         for (i = first_fb_vc; i <= last_fb_vc; i++)
3197                 set_con2fb_map(i, idx, 0);
3198
3199         if (con_is_bound(&fb_con)) {
3200                 printk(KERN_INFO "fbcon: Remapping primary device, "
3201                        "fb%i, to tty %i-%i\n", idx,
3202                        first_fb_vc + 1, last_fb_vc + 1);
3203                 info_idx = idx;
3204         }
3205         console_unlock();
3206 }
3207
3208 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3209 static void fbcon_select_primary(struct fb_info *info)
3210 {
3211         if (!map_override && primary_device == -1 &&
3212             fb_is_primary_device(info)) {
3213                 int i;
3214
3215                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3216                        info->fix.id, info->node);
3217                 primary_device = info->node;
3218
3219                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3220                         con2fb_map_boot[i] = primary_device;
3221
3222                 if (con_is_bound(&fb_con)) {
3223                         printk(KERN_INFO "fbcon: Remapping primary device, "
3224                                "fb%i, to tty %i-%i\n", info->node,
3225                                first_fb_vc + 1, last_fb_vc + 1);
3226                         info_idx = primary_device;
3227                 }
3228         }
3229
3230 }
3231 #else
3232 static inline void fbcon_select_primary(struct fb_info *info)
3233 {
3234         return;
3235 }
3236 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3237
3238 /* called with console_lock held */
3239 int fbcon_fb_registered(struct fb_info *info)
3240 {
3241         int ret = 0, i, idx;
3242
3243         WARN_CONSOLE_UNLOCKED();
3244
3245         idx = info->node;
3246         fbcon_select_primary(info);
3247
3248         if (deferred_takeover) {
3249                 pr_info("fbcon: Deferring console take-over\n");
3250                 return 0;
3251         }
3252
3253         if (info_idx == -1) {
3254                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3255                         if (con2fb_map_boot[i] == idx) {
3256                                 info_idx = idx;
3257                                 break;
3258                         }
3259                 }
3260
3261                 if (info_idx != -1)
3262                         ret = do_fbcon_takeover(1);
3263         } else {
3264                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3265                         if (con2fb_map_boot[i] == idx)
3266                                 set_con2fb_map(i, idx, 0);
3267                 }
3268         }
3269
3270         return ret;
3271 }
3272
3273 void fbcon_fb_blanked(struct fb_info *info, int blank)
3274 {
3275         struct fbcon_ops *ops = info->fbcon_par;
3276         struct vc_data *vc;
3277
3278         if (!ops || ops->currcon < 0)
3279                 return;
3280
3281         vc = vc_cons[ops->currcon].d;
3282         if (vc->vc_mode != KD_TEXT ||
3283                         registered_fb[con2fb_map[ops->currcon]] != info)
3284                 return;
3285
3286         if (con_is_visible(vc)) {
3287                 if (blank)
3288                         do_blank_screen(0);
3289                 else
3290                         do_unblank_screen(0);
3291         }
3292         ops->blank_state = blank;
3293 }
3294
3295 void fbcon_new_modelist(struct fb_info *info)
3296 {
3297         int i;
3298         struct vc_data *vc;
3299         struct fb_var_screeninfo var;
3300         const struct fb_videomode *mode;
3301
3302         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3303                 if (registered_fb[con2fb_map[i]] != info)
3304                         continue;
3305                 if (!fb_display[i].mode)
3306                         continue;
3307                 vc = vc_cons[i].d;
3308                 display_to_var(&var, &fb_display[i]);
3309                 mode = fb_find_nearest_mode(fb_display[i].mode,
3310                                             &info->modelist);
3311                 fb_videomode_to_var(&var, mode);
3312                 fbcon_set_disp(info, &var, vc->vc_num);
3313         }
3314 }
3315
3316 void fbcon_get_requirement(struct fb_info *info,
3317                            struct fb_blit_caps *caps)
3318 {
3319         struct vc_data *vc;
3320         struct fbcon_display *p;
3321
3322         if (caps->flags) {
3323                 int i, charcnt;
3324
3325                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3326                         vc = vc_cons[i].d;
3327                         if (vc && vc->vc_mode == KD_TEXT &&
3328                             info->node == con2fb_map[i]) {
3329                                 p = &fb_display[i];
3330                                 caps->x |= 1 << (vc->vc_font.width - 1);
3331                                 caps->y |= 1 << (vc->vc_font.height - 1);
3332                                 charcnt = (p->userfont) ?
3333                                         FNTCHARCNT(p->fontdata) : 256;
3334                                 if (caps->len < charcnt)
3335                                         caps->len = charcnt;
3336                         }
3337                 }
3338         } else {
3339                 vc = vc_cons[fg_console].d;
3340
3341                 if (vc && vc->vc_mode == KD_TEXT &&
3342                     info->node == con2fb_map[fg_console]) {
3343                         p = &fb_display[fg_console];
3344                         caps->x = 1 << (vc->vc_font.width - 1);
3345                         caps->y = 1 << (vc->vc_font.height - 1);
3346                         caps->len = (p->userfont) ?
3347                                 FNTCHARCNT(p->fontdata) : 256;
3348                 }
3349         }
3350 }
3351
3352 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3353 {
3354         struct fb_con2fbmap con2fb;
3355         int ret;
3356
3357         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3358                 return -EFAULT;
3359         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3360                 return -EINVAL;
3361         if (con2fb.framebuffer >= FB_MAX)
3362                 return -EINVAL;
3363         if (!registered_fb[con2fb.framebuffer])
3364                 request_module("fb%d", con2fb.framebuffer);
3365         if (!registered_fb[con2fb.framebuffer]) {
3366                 return -EINVAL;
3367         }
3368
3369         console_lock();
3370         ret = set_con2fb_map(con2fb.console - 1,
3371                              con2fb.framebuffer, 1);
3372         console_unlock();
3373
3374         return ret;
3375 }
3376
3377 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3378 {
3379         struct fb_con2fbmap con2fb;
3380
3381         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3382                 return -EFAULT;
3383         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3384                 return -EINVAL;
3385
3386         console_lock();
3387         con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3388         console_unlock();
3389
3390         return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3391 }
3392
3393 /*
3394  *  The console `switch' structure for the frame buffer based console
3395  */
3396
3397 static const struct consw fb_con = {
3398         .owner                  = THIS_MODULE,
3399         .con_startup            = fbcon_startup,
3400         .con_init               = fbcon_init,
3401         .con_deinit             = fbcon_deinit,
3402         .con_clear              = fbcon_clear,
3403         .con_putc               = fbcon_putc,
3404         .con_putcs              = fbcon_putcs,
3405         .con_cursor             = fbcon_cursor,
3406         .con_scroll             = fbcon_scroll,
3407         .con_switch             = fbcon_switch,
3408         .con_blank              = fbcon_blank,
3409         .con_font_set           = fbcon_set_font,
3410         .con_font_get           = fbcon_get_font,
3411         .con_font_default       = fbcon_set_def_font,
3412         .con_font_copy          = fbcon_copy_font,
3413         .con_set_palette        = fbcon_set_palette,
3414         .con_scrolldelta        = fbcon_scrolldelta,
3415         .con_set_origin         = fbcon_set_origin,
3416         .con_invert_region      = fbcon_invert_region,
3417         .con_screen_pos         = fbcon_screen_pos,
3418         .con_getxy              = fbcon_getxy,
3419         .con_resize             = fbcon_resize,
3420         .con_debug_enter        = fbcon_debug_enter,
3421         .con_debug_leave        = fbcon_debug_leave,
3422 };
3423
3424 static ssize_t store_rotate(struct device *device,
3425                             struct device_attribute *attr, const char *buf,
3426                             size_t count)
3427 {
3428         struct fb_info *info;
3429         int rotate, idx;
3430         char **last = NULL;
3431
3432         console_lock();
3433         idx = con2fb_map[fg_console];
3434
3435         if (idx == -1 || registered_fb[idx] == NULL)
3436                 goto err;
3437
3438         info = registered_fb[idx];
3439         rotate = simple_strtoul(buf, last, 0);
3440         fbcon_rotate(info, rotate);
3441 err:
3442         console_unlock();
3443         return count;
3444 }
3445
3446 static ssize_t store_rotate_all(struct device *device,
3447                                 struct device_attribute *attr,const char *buf,
3448                                 size_t count)
3449 {
3450         struct fb_info *info;
3451         int rotate, idx;
3452         char **last = NULL;
3453
3454         console_lock();
3455         idx = con2fb_map[fg_console];
3456
3457         if (idx == -1 || registered_fb[idx] == NULL)
3458                 goto err;
3459
3460         info = registered_fb[idx];
3461         rotate = simple_strtoul(buf, last, 0);
3462         fbcon_rotate_all(info, rotate);
3463 err:
3464         console_unlock();
3465         return count;
3466 }
3467
3468 static ssize_t show_rotate(struct device *device,
3469                            struct device_attribute *attr,char *buf)
3470 {
3471         struct fb_info *info;
3472         int rotate = 0, idx;
3473
3474         console_lock();
3475         idx = con2fb_map[fg_console];
3476
3477         if (idx == -1 || registered_fb[idx] == NULL)
3478                 goto err;
3479
3480         info = registered_fb[idx];
3481         rotate = fbcon_get_rotate(info);
3482 err:
3483         console_unlock();
3484         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3485 }
3486
3487 static ssize_t show_cursor_blink(struct device *device,
3488                                  struct device_attribute *attr, char *buf)
3489 {
3490         struct fb_info *info;
3491         struct fbcon_ops *ops;
3492         int idx, blink = -1;
3493
3494         console_lock();
3495         idx = con2fb_map[fg_console];
3496
3497         if (idx == -1 || registered_fb[idx] == NULL)
3498                 goto err;
3499
3500         info = registered_fb[idx];
3501         ops = info->fbcon_par;
3502
3503         if (!ops)
3504                 goto err;
3505
3506         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3507 err:
3508         console_unlock();
3509         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3510 }
3511
3512 static ssize_t store_cursor_blink(struct device *device,
3513                                   struct device_attribute *attr,
3514                                   const char *buf, size_t count)
3515 {
3516         struct fb_info *info;
3517         int blink, idx;
3518         char **last = NULL;
3519
3520         console_lock();
3521         idx = con2fb_map[fg_console];
3522
3523         if (idx == -1 || registered_fb[idx] == NULL)
3524                 goto err;
3525
3526         info = registered_fb[idx];
3527
3528         if (!info->fbcon_par)
3529                 goto err;
3530
3531         blink = simple_strtoul(buf, last, 0);
3532
3533         if (blink) {
3534                 fbcon_cursor_noblink = 0;
3535                 fbcon_add_cursor_timer(info);
3536         } else {
3537                 fbcon_cursor_noblink = 1;
3538                 fbcon_del_cursor_timer(info);
3539         }
3540
3541 err:
3542         console_unlock();
3543         return count;
3544 }
3545
3546 static struct device_attribute device_attrs[] = {
3547         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3548         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3549         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3550                store_cursor_blink),
3551 };
3552
3553 static int fbcon_init_device(void)
3554 {
3555         int i, error = 0;
3556
3557         fbcon_has_sysfs = 1;
3558
3559         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3560                 error = device_create_file(fbcon_device, &device_attrs[i]);
3561
3562                 if (error)
3563                         break;
3564         }
3565
3566         if (error) {
3567                 while (--i >= 0)
3568                         device_remove_file(fbcon_device, &device_attrs[i]);
3569
3570                 fbcon_has_sysfs = 0;
3571         }
3572
3573         return 0;
3574 }
3575
3576 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3577 static void fbcon_register_existing_fbs(struct work_struct *work)
3578 {
3579         int i;
3580
3581         console_lock();
3582
3583         for_each_registered_fb(i)
3584                 fbcon_fb_registered(registered_fb[i]);
3585
3586         console_unlock();
3587 }
3588
3589 static struct notifier_block fbcon_output_nb;
3590 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3591
3592 static int fbcon_output_notifier(struct notifier_block *nb,
3593                                  unsigned long action, void *data)
3594 {
3595         WARN_CONSOLE_UNLOCKED();
3596
3597         pr_info("fbcon: Taking over console\n");
3598
3599         dummycon_unregister_output_notifier(&fbcon_output_nb);
3600         deferred_takeover = false;
3601         logo_shown = FBCON_LOGO_DONTSHOW;
3602
3603         /* We may get called in atomic context */
3604         schedule_work(&fbcon_deferred_takeover_work);
3605
3606         return NOTIFY_OK;
3607 }
3608 #endif
3609
3610 static void fbcon_start(void)
3611 {
3612         WARN_CONSOLE_UNLOCKED();
3613
3614 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3615         if (conswitchp != &dummy_con)
3616                 deferred_takeover = false;
3617
3618         if (deferred_takeover) {
3619                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3620                 dummycon_register_output_notifier(&fbcon_output_nb);
3621                 return;
3622         }
3623 #endif
3624
3625         if (num_registered_fb) {
3626                 int i;
3627
3628                 for_each_registered_fb(i) {
3629                         info_idx = i;
3630                         break;
3631                 }
3632
3633                 do_fbcon_takeover(0);
3634         }
3635 }
3636
3637 static void fbcon_exit(void)
3638 {
3639         struct fb_info *info;
3640         int i, j, mapped;
3641
3642 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3643         if (deferred_takeover) {
3644                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3645                 deferred_takeover = false;
3646         }
3647 #endif
3648
3649         kvfree((void *)softback_buf);
3650         softback_buf = 0UL;
3651
3652         for_each_registered_fb(i) {
3653                 int pending = 0;
3654
3655                 mapped = 0;
3656                 info = registered_fb[i];
3657
3658                 if (info->queue.func)
3659                         pending = cancel_work_sync(&info->queue);
3660                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3661                         "no"));
3662
3663                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3664                         if (con2fb_map[j] == i) {
3665                                 mapped = 1;
3666                                 con2fb_map[j] = -1;
3667                         }
3668                 }
3669
3670                 if (mapped) {
3671                         if (info->fbops->fb_release)
3672                                 info->fbops->fb_release(info, 0);
3673                         module_put(info->fbops->owner);
3674
3675                         if (info->fbcon_par) {
3676                                 struct fbcon_ops *ops = info->fbcon_par;
3677
3678                                 fbcon_del_cursor_timer(info);
3679                                 kfree(ops->cursor_src);
3680                                 kfree(ops->cursor_state.mask);
3681                                 kfree(info->fbcon_par);
3682                                 info->fbcon_par = NULL;
3683                         }
3684
3685                         if (info->queue.func == fb_flashcursor)
3686                                 info->queue.func = NULL;
3687                 }
3688         }
3689 }
3690
3691 void __init fb_console_init(void)
3692 {
3693         int i;
3694
3695         console_lock();
3696         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3697                                      "fbcon");
3698
3699         if (IS_ERR(fbcon_device)) {
3700                 printk(KERN_WARNING "Unable to create device "
3701                        "for fbcon; errno = %ld\n",
3702                        PTR_ERR(fbcon_device));
3703                 fbcon_device = NULL;
3704         } else
3705                 fbcon_init_device();
3706
3707         for (i = 0; i < MAX_NR_CONSOLES; i++)
3708                 con2fb_map[i] = -1;
3709
3710         fbcon_start();
3711         console_unlock();
3712 }
3713
3714 #ifdef MODULE
3715
3716 static void __exit fbcon_deinit_device(void)
3717 {
3718         int i;
3719
3720         if (fbcon_has_sysfs) {
3721                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3722                         device_remove_file(fbcon_device, &device_attrs[i]);
3723
3724                 fbcon_has_sysfs = 0;
3725         }
3726 }
3727
3728 void __exit fb_console_exit(void)
3729 {
3730         console_lock();
3731         fbcon_deinit_device();
3732         device_destroy(fb_class, MKDEV(0, 0));
3733         fbcon_exit();
3734         do_unregister_con_driver(&fb_con);
3735         console_unlock();
3736 }
3737 #endif