drivers/video/console/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/vt_kern.h>
  72 #include <linux/selection.h>
  73 #include <linux/font.h>
  74 #include <linux/smp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/crc32.h> /* For counting font checksums */
  78 #include <asm/fb.h>
  79 #include <asm/irq.h>
  80 #include <asm/system.h>
  81
  82 #include "fbcon.h"
  83
  84 #ifdef FBCONDEBUG
  85 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  86 #else
  87 #  define DPRINTK(fmt, args...)
  88 #endif
  89
  90 enum {
  91         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
  92         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
  93         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
  94 };
  95
  96 static struct display fb_display[MAX_NR_CONSOLES];
  97
  98 static signed char con2fb_map[MAX_NR_CONSOLES];
  99 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 100
 101 static int logo_lines;
 102 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 103    enums.  */
 104 static int logo_shown = FBCON_LOGO_CANSHOW;
 105 /* Software scrollback */
 106 static int fbcon_softback_size = 32768;
 107 static unsigned long softback_buf, softback_curr;
 108 static unsigned long softback_in;
 109 static unsigned long softback_top, softback_end;
 110 static int softback_lines;
 111 /* console mappings */
 112 static int first_fb_vc;
 113 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 114 static int fbcon_is_default = 1;
 115 static int fbcon_has_exited;
 116 static int primary_device = -1;
 117 static int fbcon_has_console_bind;
 118
 119 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 120 static int map_override;
 121
 122 static inline void fbcon_map_override(void)
 123 {
 124         map_override = 1;
 125 }
 126 #else
 127 static inline void fbcon_map_override(void)
 128 {
 129 }
 130 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 131
 132 /* font data */
 133 static char fontname[40];
 134
 135 /* current fb_info */
 136 static int info_idx = -1;
 137
 138 /* console rotation */
 139 static int initial_rotation;
 140 static int fbcon_has_sysfs;
 141
 142 static const struct consw fb_con;
 143
 144 #define CM_SOFTBACK     (8)
 145
 146 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 147
 148 static int fbcon_set_origin(struct vc_data *);
 149
 150 #define CURSOR_DRAW_DELAY               (1)
 151
 152 static int vbl_cursor_cnt;
 153 static int fbcon_cursor_noblink;
 154
 155 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 156
 157 /*
 158  *  Interface used by the world
 159  */
 160
 161 static const char *fbcon_startup(void);
 162 static void fbcon_init(struct vc_data *vc, int init);
 163 static void fbcon_deinit(struct vc_data *vc);
 164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 165                         int width);
 166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 168                         int count, int ypos, int xpos);
 169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 170 static void fbcon_cursor(struct vc_data *vc, int mode);
 171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 172                         int count);
 173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 174                         int height, int width);
 175 static int fbcon_switch(struct vc_data *vc);
 176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 179
 180 /*
 181  *  Internal routines
 182  */
 183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 185 static __inline__ void ypan_up(struct vc_data *vc, int count);
 186 static __inline__ void ypan_down(struct vc_data *vc, int count);
 187 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 188                             int dy, int dx, int height, int width, u_int y_break);
 189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 190                            int unit);
 191 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 192                               int line, int count, int dy);
 193 static void fbcon_modechanged(struct fb_info *info);
 194 static void fbcon_set_all_vcs(struct fb_info *info);
 195 static void fbcon_start(void);
 196 static void fbcon_exit(void);
 197 static struct device *fbcon_device;
 198
 199 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 200 static inline void fbcon_set_rotation(struct fb_info *info)
 201 {
 202         struct fbcon_ops *ops = info->fbcon_par;
 203
 204         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 205             ops->p->con_rotate < 4)
 206                 ops->rotate = ops->p->con_rotate;
 207         else
 208                 ops->rotate = 0;
 209 }
 210
 211 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 212 {
 213         struct fbcon_ops *ops= info->fbcon_par;
 214         struct fb_info *fb_info;
 215
 216         if (!ops || ops->currcon == -1)
 217                 return;
 218
 219         fb_info = registered_fb[con2fb_map[ops->currcon]];
 220
 221         if (info == fb_info) {
 222                 struct display *p = &fb_display[ops->currcon];
 223
 224                 if (rotate < 4)
 225                         p->con_rotate = rotate;
 226                 else
 227                         p->con_rotate = 0;
 228
 229                 fbcon_modechanged(info);
 230         }
 231 }
 232
 233 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 234 {
 235         struct fbcon_ops *ops = info->fbcon_par;
 236         struct vc_data *vc;
 237         struct display *p;
 238         int i;
 239
 240         if (!ops || ops->currcon < 0 || rotate > 3)
 241                 return;
 242
 243         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 244                 vc = vc_cons[i].d;
 245                 if (!vc || vc->vc_mode != KD_TEXT ||
 246                     registered_fb[con2fb_map[i]] != info)
 247                         continue;
 248
 249                 p = &fb_display[vc->vc_num];
 250                 p->con_rotate = rotate;
 251         }
 252
 253         fbcon_set_all_vcs(info);
 254 }
 255 #else
 256 static inline void fbcon_set_rotation(struct fb_info *info)
 257 {
 258         struct fbcon_ops *ops = info->fbcon_par;
 259
 260         ops->rotate = FB_ROTATE_UR;
 261 }
 262
 263 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 264 {
 265         return;
 266 }
 267
 268 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 269 {
 270         return;
 271 }
 272 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 273
 274 static int fbcon_get_rotate(struct fb_info *info)
 275 {
 276         struct fbcon_ops *ops = info->fbcon_par;
 277
 278         return (ops) ? ops->rotate : 0;
 279 }
 280
 281 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 282 {
 283         struct fbcon_ops *ops = info->fbcon_par;
 284
 285         return (info->state != FBINFO_STATE_RUNNING ||
 286                 vc->vc_mode != KD_TEXT || ops->graphics) &&
 287                 !vt_force_oops_output(vc);
 288 }
 289
 290 static int get_color(struct vc_data *vc, struct fb_info *info,
 291               u16 c, int is_fg)
 292 {
 293         int depth = fb_get_color_depth(&info->var, &info->fix);
 294         int color = 0;
 295
 296         if (console_blanked) {
 297                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 298
 299                 c = vc->vc_video_erase_char & charmask;
 300         }
 301
 302         if (depth != 1)
 303                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 304                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 305
 306         switch (depth) {
 307         case 1:
 308         {
 309                 int col = mono_col(info);
 310                 /* 0 or 1 */
 311                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 312                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 313
 314                 if (console_blanked)
 315                         fg = bg;
 316
 317                 color = (is_fg) ? fg : bg;
 318                 break;
 319         }
 320         case 2:
 321                 /*
 322                  * Scale down 16-colors to 4 colors. Default 4-color palette
 323                  * is grayscale. However, simply dividing the values by 4
 324                  * will not work, as colors 1, 2 and 3 will be scaled-down
 325                  * to zero rendering them invisible.  So empirically convert
 326                  * colors to a sane 4-level grayscale.
 327                  */
 328                 switch (color) {
 329                 case 0:
 330                         color = 0; /* black */
 331                         break;
 332                 case 1 ... 6:
 333                         color = 2; /* white */
 334                         break;
 335                 case 7 ... 8:
 336                         color = 1; /* gray */
 337                         break;
 338                 default:
 339                         color = 3; /* intense white */
 340                         break;
 341                 }
 342                 break;
 343         case 3:
 344                 /*
 345                  * Last 8 entries of default 16-color palette is a more intense
 346                  * version of the first 8 (i.e., same chrominance, different
 347                  * luminance).
 348                  */
 349                 color &= 7;
 350                 break;
 351         }
 352
 353
 354         return color;
 355 }
 356
 357 static void fbcon_update_softback(struct vc_data *vc)
 358 {
 359         int l = fbcon_softback_size / vc->vc_size_row;
 360
 361         if (l > 5)
 362                 softback_end = softback_buf + l * vc->vc_size_row;
 363         else
 364                 /* Smaller scrollback makes no sense, and 0 would screw
 365                    the operation totally */
 366                 softback_top = 0;
 367 }
 368
 369 static void fb_flashcursor(struct work_struct *work)
 370 {
 371         struct fb_info *info = container_of(work, struct fb_info, queue);
 372         struct fbcon_ops *ops = info->fbcon_par;
 373         struct display *p;
 374         struct vc_data *vc = NULL;
 375         int c;
 376         int mode;
 377
 378         console_lock();
 379         if (ops && ops->currcon != -1)
 380                 vc = vc_cons[ops->currcon].d;
 381
 382         if (!vc || !CON_IS_VISIBLE(vc) ||
 383             registered_fb[con2fb_map[vc->vc_num]] != info ||
 384             vc->vc_deccm != 1) {
 385                 console_unlock();
 386                 return;
 387         }
 388
 389         p = &fb_display[vc->vc_num];
 390         c = scr_readw((u16 *) vc->vc_pos);
 391         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 392                 CM_ERASE : CM_DRAW;
 393         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 394                     get_color(vc, info, c, 0));
 395         console_unlock();
 396 }
 397
 398 static void cursor_timer_handler(unsigned long dev_addr)
 399 {
 400         struct fb_info *info = (struct fb_info *) dev_addr;
 401         struct fbcon_ops *ops = info->fbcon_par;
 402
 403         schedule_work(&info->queue);
 404         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 405 }
 406
 407 static void fbcon_add_cursor_timer(struct fb_info *info)
 408 {
 409         struct fbcon_ops *ops = info->fbcon_par;
 410
 411         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 412             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 413             !fbcon_cursor_noblink) {
 414                 if (!info->queue.func)
 415                         INIT_WORK(&info->queue, fb_flashcursor);
 416
 417                 init_timer(&ops->cursor_timer);
 418                 ops->cursor_timer.function = cursor_timer_handler;
 419                 ops->cursor_timer.expires = jiffies + HZ / 5;
 420                 ops->cursor_timer.data = (unsigned long ) info;
 421                 add_timer(&ops->cursor_timer);
 422                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 423         }
 424 }
 425
 426 static void fbcon_del_cursor_timer(struct fb_info *info)
 427 {
 428         struct fbcon_ops *ops = info->fbcon_par;
 429
 430         if (info->queue.func == fb_flashcursor &&
 431             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 432                 del_timer_sync(&ops->cursor_timer);
 433                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 434         }
 435 }
 436
 437 #ifndef MODULE
 438 static int __init fb_console_setup(char *this_opt)
 439 {
 440         char *options;
 441         int i, j;
 442
 443         if (!this_opt || !*this_opt)
 444                 return 1;
 445
 446         while ((options = strsep(&this_opt, ",")) != NULL) {
 447                 if (!strncmp(options, "font:", 5))
 448                         strcpy(fontname, options + 5);
 449
 450                 if (!strncmp(options, "scrollback:", 11)) {
 451                         options += 11;
 452                         if (*options) {
 453                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 454                                 if (*options == 'k' || *options == 'K') {
 455                                         fbcon_softback_size *= 1024;
 456                                         options++;
 457                                 }
 458                                 if (*options != ',')
 459                                         return 1;
 460                                 options++;
 461                         } else
 462                                 return 1;
 463                 }
 464
 465                 if (!strncmp(options, "map:", 4)) {
 466                         options += 4;
 467                         if (*options) {
 468                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 469                                         if (!options[j])
 470                                                 j = 0;
 471                                         con2fb_map_boot[i] =
 472                                                 (options[j++]-'0') % FB_MAX;
 473                                 }
 474
 475                                 fbcon_map_override();
 476                         }
 477
 478                         return 1;
 479                 }
 480
 481                 if (!strncmp(options, "vc:", 3)) {
 482                         options += 3;
 483                         if (*options)
 484                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 485                         if (first_fb_vc < 0)
 486                                 first_fb_vc = 0;
 487                         if (*options++ == '-')
 488                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 489                         fbcon_is_default = 0;
 490                 }
 491
 492                 if (!strncmp(options, "rotate:", 7)) {
 493                         options += 7;
 494                         if (*options)
 495                                 initial_rotation = simple_strtoul(options, &options, 0);
 496                         if (initial_rotation > 3)
 497                                 initial_rotation = 0;
 498                 }
 499         }
 500         return 1;
 501 }
 502
 503 __setup("fbcon=", fb_console_setup);
 504 #endif
 505
 506 static int search_fb_in_map(int idx)
 507 {
 508         int i, retval = 0;
 509
 510         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 511                 if (con2fb_map[i] == idx)
 512                         retval = 1;
 513         }
 514         return retval;
 515 }
 516
 517 static int search_for_mapped_con(void)
 518 {
 519         int i, retval = 0;
 520
 521         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 522                 if (con2fb_map[i] != -1)
 523                         retval = 1;
 524         }
 525         return retval;
 526 }
 527
 528 static int fbcon_takeover(int show_logo)
 529 {
 530         int err, i;
 531
 532         if (!num_registered_fb)
 533                 return -ENODEV;
 534
 535         if (!show_logo)
 536                 logo_shown = FBCON_LOGO_DONTSHOW;
 537
 538         for (i = first_fb_vc; i <= last_fb_vc; i++)
 539                 con2fb_map[i] = info_idx;
 540
 541         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 542                                 fbcon_is_default);
 543
 544         if (err) {
 545                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 546                         con2fb_map[i] = -1;
 547                 }
 548                 info_idx = -1;
 549         } else {
 550                 fbcon_has_console_bind = 1;
 551         }
 552
 553         return err;
 554 }
 555
 556 #ifdef MODULE
 557 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 558                                int cols, int rows, int new_cols, int new_rows)
 559 {
 560         logo_shown = FBCON_LOGO_DONTSHOW;
 561 }
 562 #else
 563 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 564                                int cols, int rows, int new_cols, int new_rows)
 565 {
 566         /* Need to make room for the logo */
 567         struct fbcon_ops *ops = info->fbcon_par;
 568         int cnt, erase = vc->vc_video_erase_char, step;
 569         unsigned short *save = NULL, *r, *q;
 570         int logo_height;
 571
 572         if (info->flags & FBINFO_MODULE) {
 573                 logo_shown = FBCON_LOGO_DONTSHOW;
 574                 return;
 575         }
 576
 577         /*
 578          * remove underline attribute from erase character
 579          * if black and white framebuffer.
 580          */
 581         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 582                 erase &= ~0x400;
 583         logo_height = fb_prepare_logo(info, ops->rotate);
 584         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 585         q = (unsigned short *) (vc->vc_origin +
 586                                 vc->vc_size_row * rows);
 587         step = logo_lines * cols;
 588         for (r = q - logo_lines * cols; r < q; r++)
 589                 if (scr_readw(r) != vc->vc_video_erase_char)
 590                         break;
 591         if (r != q && new_rows >= rows + logo_lines) {
 592                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 593                 if (save) {
 594                         int i = cols < new_cols ? cols : new_cols;
 595                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 596                         r = q - step;
 597                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 598                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 599                         r = q;
 600                 }
 601         }
 602         if (r == q) {
 603                 /* We can scroll screen down */
 604                 r = q - step - cols;
 605                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 606                         scr_memcpyw(r + step, r, vc->vc_size_row);
 607                         r -= cols;
 608                 }
 609                 if (!save) {
 610                         int lines;
 611                         if (vc->vc_y + logo_lines >= rows)
 612                                 lines = rows - vc->vc_y - 1;
 613                         else
 614                                 lines = logo_lines;
 615                         vc->vc_y += lines;
 616                         vc->vc_pos += lines * vc->vc_size_row;
 617                 }
 618         }
 619         scr_memsetw((unsigned short *) vc->vc_origin,
 620                     erase,
 621                     vc->vc_size_row * logo_lines);
 622
 623         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 624                 fbcon_clear_margins(vc, 0);
 625                 update_screen(vc);
 626         }
 627
 628         if (save) {
 629                 q = (unsigned short *) (vc->vc_origin +
 630                                         vc->vc_size_row *
 631                                         rows);
 632                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 633                 vc->vc_y += logo_lines;
 634                 vc->vc_pos += logo_lines * vc->vc_size_row;
 635                 kfree(save);
 636         }
 637
 638         if (logo_lines > vc->vc_bottom) {
 639                 logo_shown = FBCON_LOGO_CANSHOW;
 640                 printk(KERN_INFO
 641                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 642         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 643                 logo_shown = FBCON_LOGO_DRAW;
 644                 vc->vc_top = logo_lines;
 645         }
 646 }
 647 #endif /* MODULE */
 648
 649 #ifdef CONFIG_FB_TILEBLITTING
 650 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 651 {
 652         struct fbcon_ops *ops = info->fbcon_par;
 653
 654         ops->p = &fb_display[vc->vc_num];
 655
 656         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 657                 fbcon_set_tileops(vc, info);
 658         else {
 659                 fbcon_set_rotation(info);
 660                 fbcon_set_bitops(ops);
 661         }
 662 }
 663
 664 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 665 {
 666         int err = 0;
 667
 668         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 669             info->tileops->fb_get_tilemax(info) < charcount)
 670                 err = 1;
 671
 672         return err;
 673 }
 674 #else
 675 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 676 {
 677         struct fbcon_ops *ops = info->fbcon_par;
 678
 679         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 680         ops->p = &fb_display[vc->vc_num];
 681         fbcon_set_rotation(info);
 682         fbcon_set_bitops(ops);
 683 }
 684
 685 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 686 {
 687         return 0;
 688 }
 689
 690 #endif /* CONFIG_MISC_TILEBLITTING */
 691
 692
 693 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 694                                   int unit, int oldidx)
 695 {
 696         struct fbcon_ops *ops = NULL;
 697         int err = 0;
 698
 699         if (!try_module_get(info->fbops->owner))
 700                 err = -ENODEV;
 701
 702         if (!err && info->fbops->fb_open &&
 703             info->fbops->fb_open(info, 0))
 704                 err = -ENODEV;
 705
 706         if (!err) {
 707                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 708                 if (!ops)
 709                         err = -ENOMEM;
 710         }
 711
 712         if (!err) {
 713                 info->fbcon_par = ops;
 714
 715                 if (vc)
 716                         set_blitting_type(vc, info);
 717         }
 718
 719         if (err) {
 720                 con2fb_map[unit] = oldidx;
 721                 module_put(info->fbops->owner);
 722         }
 723
 724         return err;
 725 }
 726
 727 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 728                                   struct fb_info *newinfo, int unit,
 729                                   int oldidx, int found)
 730 {
 731         struct fbcon_ops *ops = oldinfo->fbcon_par;
 732         int err = 0, ret;
 733
 734         if (oldinfo->fbops->fb_release &&
 735             oldinfo->fbops->fb_release(oldinfo, 0)) {
 736                 con2fb_map[unit] = oldidx;
 737                 if (!found && newinfo->fbops->fb_release)
 738                         newinfo->fbops->fb_release(newinfo, 0);
 739                 if (!found)
 740                         module_put(newinfo->fbops->owner);
 741                 err = -ENODEV;
 742         }
 743
 744         if (!err) {
 745                 fbcon_del_cursor_timer(oldinfo);
 746                 kfree(ops->cursor_state.mask);
 747                 kfree(ops->cursor_data);
 748                 kfree(ops->fontbuffer);
 749                 kfree(oldinfo->fbcon_par);
 750                 oldinfo->fbcon_par = NULL;
 751                 module_put(oldinfo->fbops->owner);
 752                 /*
 753                   If oldinfo and newinfo are driving the same hardware,
 754                   the fb_release() method of oldinfo may attempt to
 755                   restore the hardware state.  This will leave the
 756                   newinfo in an undefined state. Thus, a call to
 757                   fb_set_par() may be needed for the newinfo.
 758                 */
 759                 if (newinfo->fbops->fb_set_par) {
 760                         ret = newinfo->fbops->fb_set_par(newinfo);
 761
 762                         if (ret)
 763                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 764                                         "detected unhandled fb_set_par error, "
 765                                         "error code %d\n", ret);
 766                 }
 767         }
 768
 769         return err;
 770 }
 771
 772 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 773                                 int unit, int show_logo)
 774 {
 775         struct fbcon_ops *ops = info->fbcon_par;
 776         int ret;
 777
 778         ops->currcon = fg_console;
 779
 780         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 781                 ret = info->fbops->fb_set_par(info);
 782
 783                 if (ret)
 784                         printk(KERN_ERR "con2fb_init_display: detected "
 785                                 "unhandled fb_set_par error, "
 786                                 "error code %d\n", ret);
 787         }
 788
 789         ops->flags |= FBCON_FLAGS_INIT;
 790         ops->graphics = 0;
 791         fbcon_set_disp(info, &info->var, unit);
 792
 793         if (show_logo) {
 794                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 795                 struct fb_info *fg_info =
 796                         registered_fb[con2fb_map[fg_console]];
 797
 798                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 799                                    fg_vc->vc_rows, fg_vc->vc_cols,
 800                                    fg_vc->vc_rows);
 801         }
 802
 803         update_screen(vc_cons[fg_console].d);
 804 }
 805
 806 /**
 807  *      set_con2fb_map - map console to frame buffer device
 808  *      @unit: virtual console number to map
 809  *      @newidx: frame buffer index to map virtual console to
 810  *      @user: user request
 811  *
 812  *      Maps a virtual console @unit to a frame buffer device
 813  *      @newidx.
 814  */
 815 static int set_con2fb_map(int unit, int newidx, int user)
 816 {
 817         struct vc_data *vc = vc_cons[unit].d;
 818         int oldidx = con2fb_map[unit];
 819         struct fb_info *info = registered_fb[newidx];
 820         struct fb_info *oldinfo = NULL;
 821         int found, err = 0;
 822
 823         if (oldidx == newidx)
 824                 return 0;
 825
 826         if (!info || fbcon_has_exited)
 827                 return -EINVAL;
 828
 829         if (!err && !search_for_mapped_con()) {
 830                 info_idx = newidx;
 831                 return fbcon_takeover(0);
 832         }
 833
 834         if (oldidx != -1)
 835                 oldinfo = registered_fb[oldidx];
 836
 837         found = search_fb_in_map(newidx);
 838
 839         console_lock();
 840         con2fb_map[unit] = newidx;
 841         if (!err && !found)
 842                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 843
 844
 845         /*
 846          * If old fb is not mapped to any of the consoles,
 847          * fbcon should release it.
 848          */
 849         if (!err && oldinfo && !search_fb_in_map(oldidx))
 850                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 851                                              found);
 852
 853         if (!err) {
 854                 int show_logo = (fg_console == 0 && !user &&
 855                                  logo_shown != FBCON_LOGO_DONTSHOW);
 856
 857                 if (!found)
 858                         fbcon_add_cursor_timer(info);
 859                 con2fb_map_boot[unit] = newidx;
 860                 con2fb_init_display(vc, info, unit, show_logo);
 861         }
 862
 863         if (!search_fb_in_map(info_idx))
 864                 info_idx = newidx;
 865
 866         console_unlock();
 867         return err;
 868 }
 869
 870 /*
 871  *  Low Level Operations
 872  */
 873 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 874 static int var_to_display(struct display *disp,
 875                           struct fb_var_screeninfo *var,
 876                           struct fb_info *info)
 877 {
 878         disp->xres_virtual = var->xres_virtual;
 879         disp->yres_virtual = var->yres_virtual;
 880         disp->bits_per_pixel = var->bits_per_pixel;
 881         disp->grayscale = var->grayscale;
 882         disp->nonstd = var->nonstd;
 883         disp->accel_flags = var->accel_flags;
 884         disp->height = var->height;
 885         disp->width = var->width;
 886         disp->red = var->red;
 887         disp->green = var->green;
 888         disp->blue = var->blue;
 889         disp->transp = var->transp;
 890         disp->rotate = var->rotate;
 891         disp->mode = fb_match_mode(var, &info->modelist);
 892         if (disp->mode == NULL)
 893                 /* This should not happen */
 894                 return -EINVAL;
 895         return 0;
 896 }
 897
 898 static void display_to_var(struct fb_var_screeninfo *var,
 899                            struct display *disp)
 900 {
 901         fb_videomode_to_var(var, disp->mode);
 902         var->xres_virtual = disp->xres_virtual;
 903         var->yres_virtual = disp->yres_virtual;
 904         var->bits_per_pixel = disp->bits_per_pixel;
 905         var->grayscale = disp->grayscale;
 906         var->nonstd = disp->nonstd;
 907         var->accel_flags = disp->accel_flags;
 908         var->height = disp->height;
 909         var->width = disp->width;
 910         var->red = disp->red;
 911         var->green = disp->green;
 912         var->blue = disp->blue;
 913         var->transp = disp->transp;
 914         var->rotate = disp->rotate;
 915 }
 916
 917 static const char *fbcon_startup(void)
 918 {
 919         const char *display_desc = "frame buffer device";
 920         struct display *p = &fb_display[fg_console];
 921         struct vc_data *vc = vc_cons[fg_console].d;
 922         const struct font_desc *font = NULL;
 923         struct module *owner;
 924         struct fb_info *info = NULL;
 925         struct fbcon_ops *ops;
 926         int rows, cols;
 927
 928         /*
 929          *  If num_registered_fb is zero, this is a call for the dummy part.
 930          *  The frame buffer devices weren't initialized yet.
 931          */
 932         if (!num_registered_fb || info_idx == -1)
 933                 return display_desc;
 934         /*
 935          * Instead of blindly using registered_fb[0], we use info_idx, set by
 936          * fb_console_init();
 937          */
 938         info = registered_fb[info_idx];
 939         if (!info)
 940                 return NULL;
 941
 942         owner = info->fbops->owner;
 943         if (!try_module_get(owner))
 944                 return NULL;
 945         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 946                 module_put(owner);
 947                 return NULL;
 948         }
 949
 950         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 951         if (!ops) {
 952                 module_put(owner);
 953                 return NULL;
 954         }
 955
 956         ops->currcon = -1;
 957         ops->graphics = 1;
 958         ops->cur_rotate = -1;
 959         info->fbcon_par = ops;
 960         p->con_rotate = initial_rotation;
 961         set_blitting_type(vc, info);
 962
 963         if (info->fix.type != FB_TYPE_TEXT) {
 964                 if (fbcon_softback_size) {
 965                         if (!softback_buf) {
 966                                 softback_buf =
 967                                     (unsigned long)
 968                                     kmalloc(fbcon_softback_size,
 969                                             GFP_KERNEL);
 970                                 if (!softback_buf) {
 971                                         fbcon_softback_size = 0;
 972                                         softback_top = 0;
 973                                 }
 974                         }
 975                 } else {
 976                         if (softback_buf) {
 977                                 kfree((void *) softback_buf);
 978                                 softback_buf = 0;
 979                                 softback_top = 0;
 980                         }
 981                 }
 982                 if (softback_buf)
 983                         softback_in = softback_top = softback_curr =
 984                             softback_buf;
 985                 softback_lines = 0;
 986         }
 987
 988         /* Setup default font */
 989         if (!p->fontdata) {
 990                 if (!fontname[0] || !(font = find_font(fontname)))
 991                         font = get_default_font(info->var.xres,
 992                                                 info->var.yres,
 993                                                 info->pixmap.blit_x,
 994                                                 info->pixmap.blit_y);
 995                 vc->vc_font.width = font->width;
 996                 vc->vc_font.height = font->height;
 997                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 998                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 999         }
1000
1001         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1002         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1003         cols /= vc->vc_font.width;
1004         rows /= vc->vc_font.height;
1005         vc_resize(vc, cols, rows);
1006
1007         DPRINTK("mode:   %s\n", info->fix.id);
1008         DPRINTK("visual: %d\n", info->fix.visual);
1009         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1010                 info->var.yres,
1011                 info->var.bits_per_pixel);
1012
1013         fbcon_add_cursor_timer(info);
1014         fbcon_has_exited = 0;
1015         return display_desc;
1016 }
1017
1018 static void fbcon_init(struct vc_data *vc, int init)
1019 {
1020         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1021         struct fbcon_ops *ops;
1022         struct vc_data **default_mode = vc->vc_display_fg;
1023         struct vc_data *svc = *default_mode;
1024         struct display *t, *p = &fb_display[vc->vc_num];
1025         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1026         int cap, ret;
1027
1028         if (info_idx == -1 || info == NULL)
1029             return;
1030
1031         cap = info->flags;
1032
1033         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1034             (info->fix.type == FB_TYPE_TEXT))
1035                 logo = 0;
1036
1037         if (var_to_display(p, &info->var, info))
1038                 return;
1039
1040         if (!info->fbcon_par)
1041                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1042
1043         /* If we are not the first console on this
1044            fb, copy the font from that console */
1045         t = &fb_display[fg_console];
1046         if (!p->fontdata) {
1047                 if (t->fontdata) {
1048                         struct vc_data *fvc = vc_cons[fg_console].d;
1049
1050                         vc->vc_font.data = (void *)(p->fontdata =
1051                                                     fvc->vc_font.data);
1052                         vc->vc_font.width = fvc->vc_font.width;
1053                         vc->vc_font.height = fvc->vc_font.height;
1054                         p->userfont = t->userfont;
1055
1056                         if (p->userfont)
1057                                 REFCOUNT(p->fontdata)++;
1058                 } else {
1059                         const struct font_desc *font = NULL;
1060
1061                         if (!fontname[0] || !(font = find_font(fontname)))
1062                                 font = get_default_font(info->var.xres,
1063                                                         info->var.yres,
1064                                                         info->pixmap.blit_x,
1065                                                         info->pixmap.blit_y);
1066                         vc->vc_font.width = font->width;
1067                         vc->vc_font.height = font->height;
1068                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1069                         vc->vc_font.charcount = 256; /* FIXME  Need to
1070                                                         support more fonts */
1071                 }
1072         }
1073
1074         if (p->userfont)
1075                 charcnt = FNTCHARCNT(p->fontdata);
1076
1077         vc->vc_panic_force_write = !!(info->flags & FBINFO_CAN_FORCE_OUTPUT);
1078         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1079         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1080         if (charcnt == 256) {
1081                 vc->vc_hi_font_mask = 0;
1082         } else {
1083                 vc->vc_hi_font_mask = 0x100;
1084                 if (vc->vc_can_do_color)
1085                         vc->vc_complement_mask <<= 1;
1086         }
1087
1088         if (!*svc->vc_uni_pagedir_loc)
1089                 con_set_default_unimap(svc);
1090         if (!*vc->vc_uni_pagedir_loc)
1091                 con_copy_unimap(vc, svc);
1092
1093         ops = info->fbcon_par;
1094         p->con_rotate = initial_rotation;
1095         set_blitting_type(vc, info);
1096
1097         cols = vc->vc_cols;
1098         rows = vc->vc_rows;
1099         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1100         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1101         new_cols /= vc->vc_font.width;
1102         new_rows /= vc->vc_font.height;
1103
1104         /*
1105          * We must always set the mode. The mode of the previous console
1106          * driver could be in the same resolution but we are using different
1107          * hardware so we have to initialize the hardware.
1108          *
1109          * We need to do it in fbcon_init() to prevent screen corruption.
1110          */
1111         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1112                 if (info->fbops->fb_set_par &&
1113                     !(ops->flags & FBCON_FLAGS_INIT)) {
1114                         ret = info->fbops->fb_set_par(info);
1115
1116                         if (ret)
1117                                 printk(KERN_ERR "fbcon_init: detected "
1118                                         "unhandled fb_set_par error, "
1119                                         "error code %d\n", ret);
1120                 }
1121
1122                 ops->flags |= FBCON_FLAGS_INIT;
1123         }
1124
1125         ops->graphics = 0;
1126
1127         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1128             !(cap & FBINFO_HWACCEL_DISABLED))
1129                 p->scrollmode = SCROLL_MOVE;
1130         else /* default to something safe */
1131                 p->scrollmode = SCROLL_REDRAW;
1132
1133         /*
1134          *  ++guenther: console.c:vc_allocate() relies on initializing
1135          *  vc_{cols,rows}, but we must not set those if we are only
1136          *  resizing the console.
1137          */
1138         if (init) {
1139                 vc->vc_cols = new_cols;
1140                 vc->vc_rows = new_rows;
1141         } else
1142                 vc_resize(vc, new_cols, new_rows);
1143
1144         if (logo)
1145                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1146
1147         if (vc == svc && softback_buf)
1148                 fbcon_update_softback(vc);
1149
1150         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1151                 ops->rotate = FB_ROTATE_UR;
1152                 set_blitting_type(vc, info);
1153         }
1154
1155         ops->p = &fb_display[fg_console];
1156 }
1157
1158 static void fbcon_free_font(struct display *p)
1159 {
1160         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1161                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1162         p->fontdata = NULL;
1163         p->userfont = 0;
1164 }
1165
1166 static void fbcon_deinit(struct vc_data *vc)
1167 {
1168         struct display *p = &fb_display[vc->vc_num];
1169         struct fb_info *info;
1170         struct fbcon_ops *ops;
1171         int idx;
1172
1173         fbcon_free_font(p);
1174         idx = con2fb_map[vc->vc_num];
1175
1176         if (idx == -1)
1177                 goto finished;
1178
1179         info = registered_fb[idx];
1180
1181         if (!info)
1182                 goto finished;
1183
1184         ops = info->fbcon_par;
1185
1186         if (!ops)
1187                 goto finished;
1188
1189         if (CON_IS_VISIBLE(vc))
1190                 fbcon_del_cursor_timer(info);
1191
1192         ops->flags &= ~FBCON_FLAGS_INIT;
1193 finished:
1194
1195         if (!con_is_bound(&fb_con))
1196                 fbcon_exit();
1197
1198         return;
1199 }
1200
1201 /* ====================================================================== */
1202
1203 /*  fbcon_XXX routines - interface used by the world
1204  *
1205  *  This system is now divided into two levels because of complications
1206  *  caused by hardware scrolling. Top level functions:
1207  *
1208  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1209  *
1210  *  handles y values in range [0, scr_height-1] that correspond to real
1211  *  screen positions. y_wrap shift means that first line of bitmap may be
1212  *  anywhere on this display. These functions convert lineoffsets to
1213  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1214  *
1215  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1216  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1217  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1218  *
1219  *  WARNING:
1220  *
1221  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1222  *  Implies should only really hardware scroll in rows. Only reason for
1223  *  restriction is simplicity & efficiency at the moment.
1224  */
1225
1226 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1227                         int width)
1228 {
1229         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1230         struct fbcon_ops *ops = info->fbcon_par;
1231
1232         struct display *p = &fb_display[vc->vc_num];
1233         u_int y_break;
1234
1235         if (fbcon_is_inactive(vc, info))
1236                 return;
1237
1238         if (!height || !width)
1239                 return;
1240
1241         if (sy < vc->vc_top && vc->vc_top == logo_lines)
1242                 vc->vc_top = 0;
1243
1244         /* Split blits that cross physical y_wrap boundary */
1245
1246         y_break = p->vrows - p->yscroll;
1247         if (sy < y_break && sy + height - 1 >= y_break) {
1248                 u_int b = y_break - sy;
1249                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1250                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1251                                  width);
1252         } else
1253                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1254 }
1255
1256 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1257                         int count, int ypos, int xpos)
1258 {
1259         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1260         struct display *p = &fb_display[vc->vc_num];
1261         struct fbcon_ops *ops = info->fbcon_par;
1262
1263         if (!fbcon_is_inactive(vc, info))
1264                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1265                            get_color(vc, info, scr_readw(s), 1),
1266                            get_color(vc, info, scr_readw(s), 0));
1267 }
1268
1269 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1270 {
1271         unsigned short chr;
1272
1273         scr_writew(c, &chr);
1274         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1275 }
1276
1277 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1278 {
1279         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1280         struct fbcon_ops *ops = info->fbcon_par;
1281
1282         if (!fbcon_is_inactive(vc, info))
1283                 ops->clear_margins(vc, info, bottom_only);
1284 }
1285
1286 static void fbcon_cursor(struct vc_data *vc, int mode)
1287 {
1288         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1289         struct fbcon_ops *ops = info->fbcon_par;
1290         int y;
1291         int c = scr_readw((u16 *) vc->vc_pos);
1292
1293         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1294                 return;
1295
1296         if (vc->vc_cursor_type & 0x10)
1297                 fbcon_del_cursor_timer(info);
1298         else
1299                 fbcon_add_cursor_timer(info);
1300
1301         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1302         if (mode & CM_SOFTBACK) {
1303                 mode &= ~CM_SOFTBACK;
1304                 y = softback_lines;
1305         } else {
1306                 if (softback_lines)
1307                         fbcon_set_origin(vc);
1308                 y = 0;
1309         }
1310
1311         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1312                     get_color(vc, info, c, 0));
1313         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1314 }
1315
1316 static int scrollback_phys_max = 0;
1317 static int scrollback_max = 0;
1318 static int scrollback_current = 0;
1319
1320 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1321                            int unit)
1322 {
1323         struct display *p, *t;
1324         struct vc_data **default_mode, *vc;
1325         struct vc_data *svc;
1326         struct fbcon_ops *ops = info->fbcon_par;
1327         int rows, cols, charcnt = 256;
1328
1329         p = &fb_display[unit];
1330
1331         if (var_to_display(p, var, info))
1332                 return;
1333
1334         vc = vc_cons[unit].d;
1335
1336         if (!vc)
1337                 return;
1338
1339         default_mode = vc->vc_display_fg;
1340         svc = *default_mode;
1341         t = &fb_display[svc->vc_num];
1342
1343         if (!vc->vc_font.data) {
1344                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1345                 vc->vc_font.width = (*default_mode)->vc_font.width;
1346                 vc->vc_font.height = (*default_mode)->vc_font.height;
1347                 p->userfont = t->userfont;
1348                 if (p->userfont)
1349                         REFCOUNT(p->fontdata)++;
1350         }
1351         if (p->userfont)
1352                 charcnt = FNTCHARCNT(p->fontdata);
1353
1354         var->activate = FB_ACTIVATE_NOW;
1355         info->var.activate = var->activate;
1356         var->yoffset = info->var.yoffset;
1357         var->xoffset = info->var.xoffset;
1358         fb_set_var(info, var);
1359         ops->var = info->var;
1360         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1361         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1362         if (charcnt == 256) {
1363                 vc->vc_hi_font_mask = 0;
1364         } else {
1365                 vc->vc_hi_font_mask = 0x100;
1366                 if (vc->vc_can_do_color)
1367                         vc->vc_complement_mask <<= 1;
1368         }
1369
1370         if (!*svc->vc_uni_pagedir_loc)
1371                 con_set_default_unimap(svc);
1372         if (!*vc->vc_uni_pagedir_loc)
1373                 con_copy_unimap(vc, svc);
1374
1375         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1376         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1377         cols /= vc->vc_font.width;
1378         rows /= vc->vc_font.height;
1379         vc_resize(vc, cols, rows);
1380
1381         if (CON_IS_VISIBLE(vc)) {
1382                 update_screen(vc);
1383                 if (softback_buf)
1384                         fbcon_update_softback(vc);
1385         }
1386 }
1387
1388 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1389 {
1390         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1391         struct fbcon_ops *ops = info->fbcon_par;
1392         struct display *p = &fb_display[vc->vc_num];
1393
1394         p->yscroll += count;
1395         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1396                 p->yscroll -= p->vrows;
1397         ops->var.xoffset = 0;
1398         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1399         ops->var.vmode |= FB_VMODE_YWRAP;
1400         ops->update_start(info);
1401         scrollback_max += count;
1402         if (scrollback_max > scrollback_phys_max)
1403                 scrollback_max = scrollback_phys_max;
1404         scrollback_current = 0;
1405 }
1406
1407 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1408 {
1409         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1410         struct fbcon_ops *ops = info->fbcon_par;
1411         struct display *p = &fb_display[vc->vc_num];
1412
1413         p->yscroll -= count;
1414         if (p->yscroll < 0)     /* Deal with wrap */
1415                 p->yscroll += p->vrows;
1416         ops->var.xoffset = 0;
1417         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1418         ops->var.vmode |= FB_VMODE_YWRAP;
1419         ops->update_start(info);
1420         scrollback_max -= count;
1421         if (scrollback_max < 0)
1422                 scrollback_max = 0;
1423         scrollback_current = 0;
1424 }
1425
1426 static __inline__ void ypan_up(struct vc_data *vc, int count)
1427 {
1428         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1429         struct display *p = &fb_display[vc->vc_num];
1430         struct fbcon_ops *ops = info->fbcon_par;
1431
1432         p->yscroll += count;
1433         if (p->yscroll > p->vrows - vc->vc_rows) {
1434                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1435                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1436                 p->yscroll -= p->vrows - vc->vc_rows;
1437         }
1438
1439         ops->var.xoffset = 0;
1440         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1441         ops->var.vmode &= ~FB_VMODE_YWRAP;
1442         ops->update_start(info);
1443         fbcon_clear_margins(vc, 1);
1444         scrollback_max += count;
1445         if (scrollback_max > scrollback_phys_max)
1446                 scrollback_max = scrollback_phys_max;
1447         scrollback_current = 0;
1448 }
1449
1450 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1451 {
1452         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1453         struct fbcon_ops *ops = info->fbcon_par;
1454         struct display *p = &fb_display[vc->vc_num];
1455
1456         p->yscroll += count;
1457
1458         if (p->yscroll > p->vrows - vc->vc_rows) {
1459                 p->yscroll -= p->vrows - vc->vc_rows;
1460                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1461         }
1462
1463         ops->var.xoffset = 0;
1464         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1465         ops->var.vmode &= ~FB_VMODE_YWRAP;
1466         ops->update_start(info);
1467         fbcon_clear_margins(vc, 1);
1468         scrollback_max += count;
1469         if (scrollback_max > scrollback_phys_max)
1470                 scrollback_max = scrollback_phys_max;
1471         scrollback_current = 0;
1472 }
1473
1474 static __inline__ void ypan_down(struct vc_data *vc, int count)
1475 {
1476         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1477         struct display *p = &fb_display[vc->vc_num];
1478         struct fbcon_ops *ops = info->fbcon_par;
1479
1480         p->yscroll -= count;
1481         if (p->yscroll < 0) {
1482                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1483                             0, vc->vc_rows, vc->vc_cols);
1484                 p->yscroll += p->vrows - vc->vc_rows;
1485         }
1486
1487         ops->var.xoffset = 0;
1488         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1489         ops->var.vmode &= ~FB_VMODE_YWRAP;
1490         ops->update_start(info);
1491         fbcon_clear_margins(vc, 1);
1492         scrollback_max -= count;
1493         if (scrollback_max < 0)
1494                 scrollback_max = 0;
1495         scrollback_current = 0;
1496 }
1497
1498 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1499 {
1500         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1501         struct fbcon_ops *ops = info->fbcon_par;
1502         struct display *p = &fb_display[vc->vc_num];
1503
1504         p->yscroll -= count;
1505
1506         if (p->yscroll < 0) {
1507                 p->yscroll += p->vrows - vc->vc_rows;
1508                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1509         }
1510
1511         ops->var.xoffset = 0;
1512         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1513         ops->var.vmode &= ~FB_VMODE_YWRAP;
1514         ops->update_start(info);
1515         fbcon_clear_margins(vc, 1);
1516         scrollback_max -= count;
1517         if (scrollback_max < 0)
1518                 scrollback_max = 0;
1519         scrollback_current = 0;
1520 }
1521
1522 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1523                                   long delta)
1524 {
1525         int count = vc->vc_rows;
1526         unsigned short *d, *s;
1527         unsigned long n;
1528         int line = 0;
1529
1530         d = (u16 *) softback_curr;
1531         if (d == (u16 *) softback_in)
1532                 d = (u16 *) vc->vc_origin;
1533         n = softback_curr + delta * vc->vc_size_row;
1534         softback_lines -= delta;
1535         if (delta < 0) {
1536                 if (softback_curr < softback_top && n < softback_buf) {
1537                         n += softback_end - softback_buf;
1538                         if (n < softback_top) {
1539                                 softback_lines -=
1540                                     (softback_top - n) / vc->vc_size_row;
1541                                 n = softback_top;
1542                         }
1543                 } else if (softback_curr >= softback_top
1544                            && n < softback_top) {
1545                         softback_lines -=
1546                             (softback_top - n) / vc->vc_size_row;
1547                         n = softback_top;
1548                 }
1549         } else {
1550                 if (softback_curr > softback_in && n >= softback_end) {
1551                         n += softback_buf - softback_end;
1552                         if (n > softback_in) {
1553                                 n = softback_in;
1554                                 softback_lines = 0;
1555                         }
1556                 } else if (softback_curr <= softback_in && n > softback_in) {
1557                         n = softback_in;
1558                         softback_lines = 0;
1559                 }
1560         }
1561         if (n == softback_curr)
1562                 return;
1563         softback_curr = n;
1564         s = (u16 *) softback_curr;
1565         if (s == (u16 *) softback_in)
1566                 s = (u16 *) vc->vc_origin;
1567         while (count--) {
1568                 unsigned short *start;
1569                 unsigned short *le;
1570                 unsigned short c;
1571                 int x = 0;
1572                 unsigned short attr = 1;
1573
1574                 start = s;
1575                 le = advance_row(s, 1);
1576                 do {
1577                         c = scr_readw(s);
1578                         if (attr != (c & 0xff00)) {
1579                                 attr = c & 0xff00;
1580                                 if (s > start) {
1581                                         fbcon_putcs(vc, start, s - start,
1582                                                     line, x);
1583                                         x += s - start;
1584                                         start = s;
1585                                 }
1586                         }
1587                         if (c == scr_readw(d)) {
1588                                 if (s > start) {
1589                                         fbcon_putcs(vc, start, s - start,
1590                                                     line, x);
1591                                         x += s - start + 1;
1592                                         start = s + 1;
1593                                 } else {
1594                                         x++;
1595                                         start++;
1596                                 }
1597                         }
1598                         s++;
1599                         d++;
1600                 } while (s < le);
1601                 if (s > start)
1602                         fbcon_putcs(vc, start, s - start, line, x);
1603                 line++;
1604                 if (d == (u16 *) softback_end)
1605                         d = (u16 *) softback_buf;
1606                 if (d == (u16 *) softback_in)
1607                         d = (u16 *) vc->vc_origin;
1608                 if (s == (u16 *) softback_end)
1609                         s = (u16 *) softback_buf;
1610                 if (s == (u16 *) softback_in)
1611                         s = (u16 *) vc->vc_origin;
1612         }
1613 }
1614
1615 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1616                               int line, int count, int dy)
1617 {
1618         unsigned short *s = (unsigned short *)
1619                 (vc->vc_origin + vc->vc_size_row * line);
1620
1621         while (count--) {
1622                 unsigned short *start = s;
1623                 unsigned short *le = advance_row(s, 1);
1624                 unsigned short c;
1625                 int x = 0;
1626                 unsigned short attr = 1;
1627
1628                 do {
1629                         c = scr_readw(s);
1630                         if (attr != (c & 0xff00)) {
1631                                 attr = c & 0xff00;
1632                                 if (s > start) {
1633                                         fbcon_putcs(vc, start, s - start,
1634                                                     dy, x);
1635                                         x += s - start;
1636                                         start = s;
1637                                 }
1638                         }
1639                         console_conditional_schedule();
1640                         s++;
1641                 } while (s < le);
1642                 if (s > start)
1643                         fbcon_putcs(vc, start, s - start, dy, x);
1644                 console_conditional_schedule();
1645                 dy++;
1646         }
1647 }
1648
1649 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1650                         struct display *p, int line, int count, int ycount)
1651 {
1652         int offset = ycount * vc->vc_cols;
1653         unsigned short *d = (unsigned short *)
1654             (vc->vc_origin + vc->vc_size_row * line);
1655         unsigned short *s = d + offset;
1656         struct fbcon_ops *ops = info->fbcon_par;
1657
1658         while (count--) {
1659                 unsigned short *start = s;
1660                 unsigned short *le = advance_row(s, 1);
1661                 unsigned short c;
1662                 int x = 0;
1663
1664                 do {
1665                         c = scr_readw(s);
1666
1667                         if (c == scr_readw(d)) {
1668                                 if (s > start) {
1669                                         ops->bmove(vc, info, line + ycount, x,
1670                                                    line, x, 1, s-start);
1671                                         x += s - start + 1;
1672                                         start = s + 1;
1673                                 } else {
1674                                         x++;
1675                                         start++;
1676                                 }
1677                         }
1678
1679                         scr_writew(c, d);
1680                         console_conditional_schedule();
1681                         s++;
1682                         d++;
1683                 } while (s < le);
1684                 if (s > start)
1685                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1686                                    s-start);
1687                 console_conditional_schedule();
1688                 if (ycount > 0)
1689                         line++;
1690                 else {
1691                         line--;
1692                         /* NOTE: We subtract two lines from these pointers */
1693                         s -= vc->vc_size_row;
1694                         d -= vc->vc_size_row;
1695                 }
1696         }
1697 }
1698
1699 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1700                          int line, int count, int offset)
1701 {
1702         unsigned short *d = (unsigned short *)
1703             (vc->vc_origin + vc->vc_size_row * line);
1704         unsigned short *s = d + offset;
1705
1706         while (count--) {
1707                 unsigned short *start = s;
1708                 unsigned short *le = advance_row(s, 1);
1709                 unsigned short c;
1710                 int x = 0;
1711                 unsigned short attr = 1;
1712
1713                 do {
1714                         c = scr_readw(s);
1715                         if (attr != (c & 0xff00)) {
1716                                 attr = c & 0xff00;
1717                                 if (s > start) {
1718                                         fbcon_putcs(vc, start, s - start,
1719                                                     line, x);
1720                                         x += s - start;
1721                                         start = s;
1722                                 }
1723                         }
1724                         if (c == scr_readw(d)) {
1725                                 if (s > start) {
1726                                         fbcon_putcs(vc, start, s - start,
1727                                                      line, x);
1728                                         x += s - start + 1;
1729                                         start = s + 1;
1730                                 } else {
1731                                         x++;
1732                                         start++;
1733                                 }
1734                         }
1735                         scr_writew(c, d);
1736                         console_conditional_schedule();
1737                         s++;
1738                         d++;
1739                 } while (s < le);
1740                 if (s > start)
1741                         fbcon_putcs(vc, start, s - start, line, x);
1742                 console_conditional_schedule();
1743                 if (offset > 0)
1744                         line++;
1745                 else {
1746                         line--;
1747                         /* NOTE: We subtract two lines from these pointers */
1748                         s -= vc->vc_size_row;
1749                         d -= vc->vc_size_row;
1750                 }
1751         }
1752 }
1753
1754 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1755                                        int count)
1756 {
1757         unsigned short *p;
1758
1759         if (vc->vc_num != fg_console)
1760                 return;
1761         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1762
1763         while (count) {
1764                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1765                 count--;
1766                 p = advance_row(p, 1);
1767                 softback_in += vc->vc_size_row;
1768                 if (softback_in == softback_end)
1769                         softback_in = softback_buf;
1770                 if (softback_in == softback_top) {
1771                         softback_top += vc->vc_size_row;
1772                         if (softback_top == softback_end)
1773                                 softback_top = softback_buf;
1774                 }
1775         }
1776         softback_curr = softback_in;
1777 }
1778
1779 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1780                         int count)
1781 {
1782         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1783         struct display *p = &fb_display[vc->vc_num];
1784         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1785
1786         if (fbcon_is_inactive(vc, info))
1787                 return -EINVAL;
1788
1789         fbcon_cursor(vc, CM_ERASE);
1790
1791         /*
1792          * ++Geert: Only use ywrap/ypan if the console is in text mode
1793          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1794          *           whole screen (prevents flicker).
1795          */
1796
1797         switch (dir) {
1798         case SM_UP:
1799                 if (count > vc->vc_rows)        /* Maximum realistic size */
1800                         count = vc->vc_rows;
1801                 if (softback_top)
1802                         fbcon_softback_note(vc, t, count);
1803                 if (logo_shown >= 0)
1804                         goto redraw_up;
1805                 switch (p->scrollmode) {
1806                 case SCROLL_MOVE:
1807                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1808                                      count);
1809                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1810                         scr_memsetw((unsigned short *) (vc->vc_origin +
1811                                                         vc->vc_size_row *
1812                                                         (b - count)),
1813                                     vc->vc_video_erase_char,
1814                                     vc->vc_size_row * count);
1815                         return 1;
1816                         break;
1817
1818                 case SCROLL_WRAP_MOVE:
1819                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1820                                 if (t > 0)
1821                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1822                                                     vc->vc_cols);
1823                                 ywrap_up(vc, count);
1824                                 if (vc->vc_rows - b > 0)
1825                                         fbcon_bmove(vc, b - count, 0, b, 0,
1826                                                     vc->vc_rows - b,
1827                                                     vc->vc_cols);
1828                         } else if (info->flags & FBINFO_READS_FAST)
1829                                 fbcon_bmove(vc, t + count, 0, t, 0,
1830                                             b - t - count, vc->vc_cols);
1831                         else
1832                                 goto redraw_up;
1833                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1834                         break;
1835
1836                 case SCROLL_PAN_REDRAW:
1837                         if ((p->yscroll + count <=
1838                              2 * (p->vrows - vc->vc_rows))
1839                             && ((!scroll_partial && (b - t == vc->vc_rows))
1840                                 || (scroll_partial
1841                                     && (b - t - count >
1842                                         3 * vc->vc_rows >> 2)))) {
1843                                 if (t > 0)
1844                                         fbcon_redraw_move(vc, p, 0, t, count);
1845                                 ypan_up_redraw(vc, t, count);
1846                                 if (vc->vc_rows - b > 0)
1847                                         fbcon_redraw_move(vc, p, b,
1848                                                           vc->vc_rows - b, b);
1849                         } else
1850                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1851                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1852                         break;
1853
1854                 case SCROLL_PAN_MOVE:
1855                         if ((p->yscroll + count <=
1856                              2 * (p->vrows - vc->vc_rows))
1857                             && ((!scroll_partial && (b - t == vc->vc_rows))
1858                                 || (scroll_partial
1859                                     && (b - t - count >
1860                                         3 * vc->vc_rows >> 2)))) {
1861                                 if (t > 0)
1862                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1863                                                     vc->vc_cols);
1864                                 ypan_up(vc, count);
1865                                 if (vc->vc_rows - b > 0)
1866                                         fbcon_bmove(vc, b - count, 0, b, 0,
1867                                                     vc->vc_rows - b,
1868                                                     vc->vc_cols);
1869                         } else if (info->flags & FBINFO_READS_FAST)
1870                                 fbcon_bmove(vc, t + count, 0, t, 0,
1871                                             b - t - count, vc->vc_cols);
1872                         else
1873                                 goto redraw_up;
1874                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1875                         break;
1876
1877                 case SCROLL_REDRAW:
1878                       redraw_up:
1879                         fbcon_redraw(vc, p, t, b - t - count,
1880                                      count * vc->vc_cols);
1881                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1882                         scr_memsetw((unsigned short *) (vc->vc_origin +
1883                                                         vc->vc_size_row *
1884                                                         (b - count)),
1885                                     vc->vc_video_erase_char,
1886                                     vc->vc_size_row * count);
1887                         return 1;
1888                 }
1889                 break;
1890
1891         case SM_DOWN:
1892                 if (count > vc->vc_rows)        /* Maximum realistic size */
1893                         count = vc->vc_rows;
1894                 if (logo_shown >= 0)
1895                         goto redraw_down;
1896                 switch (p->scrollmode) {
1897                 case SCROLL_MOVE:
1898                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1899                                      -count);
1900                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1901                         scr_memsetw((unsigned short *) (vc->vc_origin +
1902                                                         vc->vc_size_row *
1903                                                         t),
1904                                     vc->vc_video_erase_char,
1905                                     vc->vc_size_row * count);
1906                         return 1;
1907                         break;
1908
1909                 case SCROLL_WRAP_MOVE:
1910                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1911                                 if (vc->vc_rows - b > 0)
1912                                         fbcon_bmove(vc, b, 0, b - count, 0,
1913                                                     vc->vc_rows - b,
1914                                                     vc->vc_cols);
1915                                 ywrap_down(vc, count);
1916                                 if (t > 0)
1917                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1918                                                     vc->vc_cols);
1919                         } else if (info->flags & FBINFO_READS_FAST)
1920                                 fbcon_bmove(vc, t, 0, t + count, 0,
1921                                             b - t - count, vc->vc_cols);
1922                         else
1923                                 goto redraw_down;
1924                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1925                         break;
1926
1927                 case SCROLL_PAN_MOVE:
1928                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1929                             && ((!scroll_partial && (b - t == vc->vc_rows))
1930                                 || (scroll_partial
1931                                     && (b - t - count >
1932                                         3 * vc->vc_rows >> 2)))) {
1933                                 if (vc->vc_rows - b > 0)
1934                                         fbcon_bmove(vc, b, 0, b - count, 0,
1935                                                     vc->vc_rows - b,
1936                                                     vc->vc_cols);
1937                                 ypan_down(vc, count);
1938                                 if (t > 0)
1939                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1940                                                     vc->vc_cols);
1941                         } else if (info->flags & FBINFO_READS_FAST)
1942                                 fbcon_bmove(vc, t, 0, t + count, 0,
1943                                             b - t - count, vc->vc_cols);
1944                         else
1945                                 goto redraw_down;
1946                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1947                         break;
1948
1949                 case SCROLL_PAN_REDRAW:
1950                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1951                             && ((!scroll_partial && (b - t == vc->vc_rows))
1952                                 || (scroll_partial
1953                                     && (b - t - count >
1954                                         3 * vc->vc_rows >> 2)))) {
1955                                 if (vc->vc_rows - b > 0)
1956                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1957                                                           b - count);
1958                                 ypan_down_redraw(vc, t, count);
1959                                 if (t > 0)
1960                                         fbcon_redraw_move(vc, p, count, t, 0);
1961                         } else
1962                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1963                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1964                         break;
1965
1966                 case SCROLL_REDRAW:
1967                       redraw_down:
1968                         fbcon_redraw(vc, p, b - 1, b - t - count,
1969                                      -count * vc->vc_cols);
1970                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1971                         scr_memsetw((unsigned short *) (vc->vc_origin +
1972                                                         vc->vc_size_row *
1973                                                         t),
1974                                     vc->vc_video_erase_char,
1975                                     vc->vc_size_row * count);
1976                         return 1;
1977                 }
1978         }
1979         return 0;
1980 }
1981
1982
1983 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1984                         int height, int width)
1985 {
1986         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1987         struct display *p = &fb_display[vc->vc_num];
1988
1989         if (fbcon_is_inactive(vc, info))
1990                 return;
1991
1992         if (!width || !height)
1993                 return;
1994
1995         /*  Split blits that cross physical y_wrap case.
1996          *  Pathological case involves 4 blits, better to use recursive
1997          *  code rather than unrolled case
1998          *
1999          *  Recursive invocations don't need to erase the cursor over and
2000          *  over again, so we use fbcon_bmove_rec()
2001          */
2002         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2003                         p->vrows - p->yscroll);
2004 }
2005
2006 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2007                             int dy, int dx, int height, int width, u_int y_break)
2008 {
2009         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2010         struct fbcon_ops *ops = info->fbcon_par;
2011         u_int b;
2012
2013         if (sy < y_break && sy + height > y_break) {
2014                 b = y_break - sy;
2015                 if (dy < sy) {  /* Avoid trashing self */
2016                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2017                                         y_break);
2018                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2019                                         height - b, width, y_break);
2020                 } else {
2021                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2022                                         height - b, width, y_break);
2023                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2024                                         y_break);
2025                 }
2026                 return;
2027         }
2028
2029         if (dy < y_break && dy + height > y_break) {
2030                 b = y_break - dy;
2031                 if (dy < sy) {  /* Avoid trashing self */
2032                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2033                                         y_break);
2034                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2035                                         height - b, width, y_break);
2036                 } else {
2037                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2038                                         height - b, width, y_break);
2039                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2040                                         y_break);
2041                 }
2042                 return;
2043         }
2044         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2045                    height, width);
2046 }
2047
2048 static void updatescrollmode(struct display *p,
2049                                         struct fb_info *info,
2050                                         struct vc_data *vc)
2051 {
2052         struct fbcon_ops *ops = info->fbcon_par;
2053         int fh = vc->vc_font.height;
2054         int cap = info->flags;
2055         u16 t = 0;
2056         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2057                                   info->fix.xpanstep);
2058         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2059         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2060         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2061                                    info->var.xres_virtual);
2062         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2063                 divides(ypan, vc->vc_font.height) && vyres > yres;
2064         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2065                 divides(ywrap, vc->vc_font.height) &&
2066                 divides(vc->vc_font.height, vyres) &&
2067                 divides(vc->vc_font.height, yres);
2068         int reading_fast = cap & FBINFO_READS_FAST;
2069         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2070                 !(cap & FBINFO_HWACCEL_DISABLED);
2071         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2072                 !(cap & FBINFO_HWACCEL_DISABLED);
2073
2074         p->vrows = vyres/fh;
2075         if (yres > (fh * (vc->vc_rows + 1)))
2076                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2077         if ((yres % fh) && (vyres % fh < yres % fh))
2078                 p->vrows--;
2079
2080         if (good_wrap || good_pan) {
2081                 if (reading_fast || fast_copyarea)
2082                         p->scrollmode = good_wrap ?
2083                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2084                 else
2085                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2086                                 SCROLL_PAN_REDRAW;
2087         } else {
2088                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2089                         p->scrollmode = SCROLL_MOVE;
2090                 else
2091                         p->scrollmode = SCROLL_REDRAW;
2092         }
2093 }
2094
2095 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2096                         unsigned int height, unsigned int user)
2097 {
2098         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2099         struct fbcon_ops *ops = info->fbcon_par;
2100         struct display *p = &fb_display[vc->vc_num];
2101         struct fb_var_screeninfo var = info->var;
2102         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2103
2104         virt_w = FBCON_SWAP(ops->rotate, width, height);
2105         virt_h = FBCON_SWAP(ops->rotate, height, width);
2106         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2107                                  vc->vc_font.height);
2108         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2109                                  vc->vc_font.width);
2110         var.xres = virt_w * virt_fw;
2111         var.yres = virt_h * virt_fh;
2112         x_diff = info->var.xres - var.xres;
2113         y_diff = info->var.yres - var.yres;
2114         if (x_diff < 0 || x_diff > virt_fw ||
2115             y_diff < 0 || y_diff > virt_fh) {
2116                 const struct fb_videomode *mode;
2117
2118                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2119                 mode = fb_find_best_mode(&var, &info->modelist);
2120                 if (mode == NULL)
2121                         return -EINVAL;
2122                 display_to_var(&var, p);
2123                 fb_videomode_to_var(&var, mode);
2124
2125                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2126                         return -EINVAL;
2127
2128                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2129                 if (CON_IS_VISIBLE(vc)) {
2130                         var.activate = FB_ACTIVATE_NOW |
2131                                 FB_ACTIVATE_FORCE;
2132                         fb_set_var(info, &var);
2133                 }
2134                 var_to_display(p, &info->var, info);
2135                 ops->var = info->var;
2136         }
2137         updatescrollmode(p, info, vc);
2138         return 0;
2139 }
2140
2141 static int fbcon_switch(struct vc_data *vc)
2142 {
2143         struct fb_info *info, *old_info = NULL;
2144         struct fbcon_ops *ops;
2145         struct display *p = &fb_display[vc->vc_num];
2146         struct fb_var_screeninfo var;
2147         int i, ret, prev_console, charcnt = 256;
2148
2149         info = registered_fb[con2fb_map[vc->vc_num]];
2150         ops = info->fbcon_par;
2151
2152         if (softback_top) {
2153                 if (softback_lines)
2154                         fbcon_set_origin(vc);
2155                 softback_top = softback_curr = softback_in = softback_buf;
2156                 softback_lines = 0;
2157                 fbcon_update_softback(vc);
2158         }
2159
2160         if (logo_shown >= 0) {
2161                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2162
2163                 if (conp2->vc_top == logo_lines
2164                     && conp2->vc_bottom == conp2->vc_rows)
2165                         conp2->vc_top = 0;
2166                 logo_shown = FBCON_LOGO_CANSHOW;
2167         }
2168
2169         prev_console = ops->currcon;
2170         if (prev_console != -1)
2171                 old_info = registered_fb[con2fb_map[prev_console]];
2172         /*
2173          * FIXME: If we have multiple fbdev's loaded, we need to
2174          * update all info->currcon.  Perhaps, we can place this
2175          * in a centralized structure, but this might break some
2176          * drivers.
2177          *
2178          * info->currcon = vc->vc_num;
2179          */
2180         for (i = 0; i < FB_MAX; i++) {
2181                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2182                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2183
2184                         o->currcon = vc->vc_num;
2185                 }
2186         }
2187         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2188         display_to_var(&var, p);
2189         var.activate = FB_ACTIVATE_NOW;
2190
2191         /*
2192          * make sure we don't unnecessarily trip the memcmp()
2193          * in fb_set_var()
2194          */
2195         info->var.activate = var.activate;
2196         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2197         fb_set_var(info, &var);
2198         ops->var = info->var;
2199
2200         if (old_info != NULL && (old_info != info ||
2201                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2202                 if (info->fbops->fb_set_par) {
2203                         ret = info->fbops->fb_set_par(info);
2204
2205                         if (ret)
2206                                 printk(KERN_ERR "fbcon_switch: detected "
2207                                         "unhandled fb_set_par error, "
2208                                         "error code %d\n", ret);
2209                 }
2210
2211                 if (old_info != info)
2212                         fbcon_del_cursor_timer(old_info);
2213         }
2214
2215         if (fbcon_is_inactive(vc, info) ||
2216             ops->blank_state != FB_BLANK_UNBLANK)
2217                 fbcon_del_cursor_timer(info);
2218         else
2219                 fbcon_add_cursor_timer(info);
2220
2221         set_blitting_type(vc, info);
2222         ops->cursor_reset = 1;
2223
2224         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2225                 ops->rotate = FB_ROTATE_UR;
2226                 set_blitting_type(vc, info);
2227         }
2228
2229         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2230         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2231
2232         if (p->userfont)
2233                 charcnt = FNTCHARCNT(vc->vc_font.data);
2234
2235         if (charcnt > 256)
2236                 vc->vc_complement_mask <<= 1;
2237
2238         updatescrollmode(p, info, vc);
2239
2240         switch (p->scrollmode) {
2241         case SCROLL_WRAP_MOVE:
2242                 scrollback_phys_max = p->vrows - vc->vc_rows;
2243                 break;
2244         case SCROLL_PAN_MOVE:
2245         case SCROLL_PAN_REDRAW:
2246                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2247                 if (scrollback_phys_max < 0)
2248                         scrollback_phys_max = 0;
2249                 break;
2250         default:
2251                 scrollback_phys_max = 0;
2252                 break;
2253         }
2254
2255         scrollback_max = 0;
2256         scrollback_current = 0;
2257
2258         if (!fbcon_is_inactive(vc, info)) {
2259             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2260             ops->update_start(info);
2261         }
2262
2263         fbcon_set_palette(vc, color_table);
2264         fbcon_clear_margins(vc, 0);
2265
2266         if (logo_shown == FBCON_LOGO_DRAW) {
2267
2268                 logo_shown = fg_console;
2269                 /* This is protected above by initmem_freed */
2270                 fb_show_logo(info, ops->rotate);
2271                 update_region(vc,
2272                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2273                               vc->vc_size_row * (vc->vc_bottom -
2274                                                  vc->vc_top) / 2);
2275                 return 0;
2276         }
2277         return 1;
2278 }
2279
2280 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2281                                 int blank)
2282 {
2283         struct fb_event event;
2284
2285         if (blank) {
2286                 unsigned short charmask = vc->vc_hi_font_mask ?
2287                         0x1ff : 0xff;
2288                 unsigned short oldc;
2289
2290                 oldc = vc->vc_video_erase_char;
2291                 vc->vc_video_erase_char &= charmask;
2292                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2293                 vc->vc_video_erase_char = oldc;
2294         }
2295
2296
2297         if (!lock_fb_info(info))
2298                 return;
2299         event.info = info;
2300         event.data = &blank;
2301         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2302         unlock_fb_info(info);
2303 }
2304
2305 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2306 {
2307         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2308         struct fbcon_ops *ops = info->fbcon_par;
2309
2310         if (mode_switch) {
2311                 struct fb_var_screeninfo var = info->var;
2312
2313                 ops->graphics = 1;
2314
2315                 if (!blank) {
2316                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2317                         fb_set_var(info, &var);
2318                         ops->graphics = 0;
2319                         ops->var = info->var;
2320                 }
2321         }
2322
2323         if (!fbcon_is_inactive(vc, info)) {
2324                 if (ops->blank_state != blank) {
2325                         ops->blank_state = blank;
2326                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2327                         ops->cursor_flash = (!blank);
2328
2329                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2330                                 if (fb_blank(info, blank))
2331                                         fbcon_generic_blank(vc, info, blank);
2332                 }
2333
2334                 if (!blank)
2335                         update_screen(vc);
2336         }
2337
2338         if (mode_switch || fbcon_is_inactive(vc, info) ||
2339             ops->blank_state != FB_BLANK_UNBLANK)
2340                 fbcon_del_cursor_timer(info);
2341         else
2342                 fbcon_add_cursor_timer(info);
2343
2344         return 0;
2345 }
2346
2347 static int fbcon_debug_enter(struct vc_data *vc)
2348 {
2349         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2350         struct fbcon_ops *ops = info->fbcon_par;
2351
2352         ops->save_graphics = ops->graphics;
2353         ops->graphics = 0;
2354         if (info->fbops->fb_debug_enter)
2355                 info->fbops->fb_debug_enter(info);
2356         fbcon_set_palette(vc, color_table);
2357         return 0;
2358 }
2359
2360 static int fbcon_debug_leave(struct vc_data *vc)
2361 {
2362         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2363         struct fbcon_ops *ops = info->fbcon_par;
2364
2365         ops->graphics = ops->save_graphics;
2366         if (info->fbops->fb_debug_leave)
2367                 info->fbops->fb_debug_leave(info);
2368         return 0;
2369 }
2370
2371 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2372 {
2373         u8 *fontdata = vc->vc_font.data;
2374         u8 *data = font->data;
2375         int i, j;
2376
2377         font->width = vc->vc_font.width;
2378         font->height = vc->vc_font.height;
2379         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2380         if (!font->data)
2381                 return 0;
2382
2383         if (font->width <= 8) {
2384                 j = vc->vc_font.height;
2385                 for (i = 0; i < font->charcount; i++) {
2386                         memcpy(data, fontdata, j);
2387                         memset(data + j, 0, 32 - j);
2388                         data += 32;
2389                         fontdata += j;
2390                 }
2391         } else if (font->width <= 16) {
2392                 j = vc->vc_font.height * 2;
2393                 for (i = 0; i < font->charcount; i++) {
2394                         memcpy(data, fontdata, j);
2395                         memset(data + j, 0, 64 - j);
2396                         data += 64;
2397                         fontdata += j;
2398                 }
2399         } else if (font->width <= 24) {
2400                 for (i = 0; i < font->charcount; i++) {
2401                         for (j = 0; j < vc->vc_font.height; j++) {
2402                                 *data++ = fontdata[0];
2403                                 *data++ = fontdata[1];
2404                                 *data++ = fontdata[2];
2405                                 fontdata += sizeof(u32);
2406                         }
2407                         memset(data, 0, 3 * (32 - j));
2408                         data += 3 * (32 - j);
2409                 }
2410         } else {
2411                 j = vc->vc_font.height * 4;
2412                 for (i = 0; i < font->charcount; i++) {
2413                         memcpy(data, fontdata, j);
2414                         memset(data + j, 0, 128 - j);
2415                         data += 128;
2416                         fontdata += j;
2417                 }
2418         }
2419         return 0;
2420 }
2421
2422 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2423                              const u8 * data, int userfont)
2424 {
2425         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2426         struct fbcon_ops *ops = info->fbcon_par;
2427         struct display *p = &fb_display[vc->vc_num];
2428         int resize;
2429         int cnt;
2430         char *old_data = NULL;
2431
2432         if (CON_IS_VISIBLE(vc) && softback_lines)
2433                 fbcon_set_origin(vc);
2434
2435         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2436         if (p->userfont)
2437                 old_data = vc->vc_font.data;
2438         if (userfont)
2439                 cnt = FNTCHARCNT(data);
2440         else
2441                 cnt = 256;
2442         vc->vc_font.data = (void *)(p->fontdata = data);
2443         if ((p->userfont = userfont))
2444                 REFCOUNT(data)++;
2445         vc->vc_font.width = w;
2446         vc->vc_font.height = h;
2447         if (vc->vc_hi_font_mask && cnt == 256) {
2448                 vc->vc_hi_font_mask = 0;
2449                 if (vc->vc_can_do_color) {
2450                         vc->vc_complement_mask >>= 1;
2451                         vc->vc_s_complement_mask >>= 1;
2452                 }
2453
2454                 /* ++Edmund: reorder the attribute bits */
2455                 if (vc->vc_can_do_color) {
2456                         unsigned short *cp =
2457                             (unsigned short *) vc->vc_origin;
2458                         int count = vc->vc_screenbuf_size / 2;
2459                         unsigned short c;
2460                         for (; count > 0; count--, cp++) {
2461                                 c = scr_readw(cp);
2462                                 scr_writew(((c & 0xfe00) >> 1) |
2463                                            (c & 0xff), cp);
2464                         }
2465                         c = vc->vc_video_erase_char;
2466                         vc->vc_video_erase_char =
2467                             ((c & 0xfe00) >> 1) | (c & 0xff);
2468                         vc->vc_attr >>= 1;
2469                 }
2470         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2471                 vc->vc_hi_font_mask = 0x100;
2472                 if (vc->vc_can_do_color) {
2473                         vc->vc_complement_mask <<= 1;
2474                         vc->vc_s_complement_mask <<= 1;
2475                 }
2476
2477                 /* ++Edmund: reorder the attribute bits */
2478                 {
2479                         unsigned short *cp =
2480                             (unsigned short *) vc->vc_origin;
2481                         int count = vc->vc_screenbuf_size / 2;
2482                         unsigned short c;
2483                         for (; count > 0; count--, cp++) {
2484                                 unsigned short newc;
2485                                 c = scr_readw(cp);
2486                                 if (vc->vc_can_do_color)
2487                                         newc =
2488                                             ((c & 0xff00) << 1) | (c &
2489                                                                    0xff);
2490                                 else
2491                                         newc = c & ~0x100;
2492                                 scr_writew(newc, cp);
2493                         }
2494                         c = vc->vc_video_erase_char;
2495                         if (vc->vc_can_do_color) {
2496                                 vc->vc_video_erase_char =
2497                                     ((c & 0xff00) << 1) | (c & 0xff);
2498                                 vc->vc_attr <<= 1;
2499                         } else
2500                                 vc->vc_video_erase_char = c & ~0x100;
2501                 }
2502
2503         }
2504
2505         if (resize) {
2506                 int cols, rows;
2507
2508                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2509                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2510                 cols /= w;
2511                 rows /= h;
2512                 vc_resize(vc, cols, rows);
2513                 if (CON_IS_VISIBLE(vc) && softback_buf)
2514                         fbcon_update_softback(vc);
2515         } else if (CON_IS_VISIBLE(vc)
2516                    && vc->vc_mode == KD_TEXT) {
2517                 fbcon_clear_margins(vc, 0);
2518                 update_screen(vc);
2519         }
2520
2521         if (old_data && (--REFCOUNT(old_data) == 0))
2522                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2523         return 0;
2524 }
2525
2526 static int fbcon_copy_font(struct vc_data *vc, int con)
2527 {
2528         struct display *od = &fb_display[con];
2529         struct console_font *f = &vc->vc_font;
2530
2531         if (od->fontdata == f->data)
2532                 return 0;       /* already the same font... */
2533         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2534 }
2535
2536 /*
2537  *  User asked to set font; we are guaranteed that
2538  *      a) width and height are in range 1..32
2539  *      b) charcount does not exceed 512
2540  *  but lets not assume that, since someone might someday want to use larger
2541  *  fonts. And charcount of 512 is small for unicode support.
2542  *
2543  *  However, user space gives the font in 32 rows , regardless of
2544  *  actual font height. So a new API is needed if support for larger fonts
2545  *  is ever implemented.
2546  */
2547
2548 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2549 {
2550         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2551         unsigned charcount = font->charcount;
2552         int w = font->width;
2553         int h = font->height;
2554         int size;
2555         int i, csum;
2556         u8 *new_data, *data = font->data;
2557         int pitch = (font->width+7) >> 3;
2558
2559         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2560          * If not this check should be changed to charcount < 256 */
2561         if (charcount != 256 && charcount != 512)
2562                 return -EINVAL;
2563
2564         /* Make sure drawing engine can handle the font */
2565         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2566             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2567                 return -EINVAL;
2568
2569         /* Make sure driver can handle the font length */
2570         if (fbcon_invalid_charcount(info, charcount))
2571                 return -EINVAL;
2572
2573         size = h * pitch * charcount;
2574
2575         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2576
2577         if (!new_data)
2578                 return -ENOMEM;
2579
2580         new_data += FONT_EXTRA_WORDS * sizeof(int);
2581         FNTSIZE(new_data) = size;
2582         FNTCHARCNT(new_data) = charcount;
2583         REFCOUNT(new_data) = 0; /* usage counter */
2584         for (i=0; i< charcount; i++) {
2585                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2586         }
2587
2588         /* Since linux has a nice crc32 function use it for counting font
2589          * checksums. */
2590         csum = crc32(0, new_data, size);
2591
2592         FNTSUM(new_data) = csum;
2593         /* Check if the same font is on some other console already */
2594         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2595                 struct vc_data *tmp = vc_cons[i].d;
2596
2597                 if (fb_display[i].userfont &&
2598                     fb_display[i].fontdata &&
2599                     FNTSUM(fb_display[i].fontdata) == csum &&
2600                     FNTSIZE(fb_display[i].fontdata) == size &&
2601                     tmp->vc_font.width == w &&
2602                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2603                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2604                         new_data = (u8 *)fb_display[i].fontdata;
2605                         break;
2606                 }
2607         }
2608         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2609 }
2610
2611 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2612 {
2613         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2614         const struct font_desc *f;
2615
2616         if (!name)
2617                 f = get_default_font(info->var.xres, info->var.yres,
2618                                      info->pixmap.blit_x, info->pixmap.blit_y);
2619         else if (!(f = find_font(name)))
2620                 return -ENOENT;
2621
2622         font->width = f->width;
2623         font->height = f->height;
2624         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2625 }
2626
2627 static u16 palette_red[16];
2628 static u16 palette_green[16];
2629 static u16 palette_blue[16];
2630
2631 static struct fb_cmap palette_cmap = {
2632         0, 16, palette_red, palette_green, palette_blue, NULL
2633 };
2634
2635 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2636 {
2637         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2638         int i, j, k, depth;
2639         u8 val;
2640
2641         if (fbcon_is_inactive(vc, info))
2642                 return -EINVAL;
2643
2644         if (!CON_IS_VISIBLE(vc))
2645                 return 0;
2646
2647         depth = fb_get_color_depth(&info->var, &info->fix);
2648         if (depth > 3) {
2649                 for (i = j = 0; i < 16; i++) {
2650                         k = table[i];
2651                         val = vc->vc_palette[j++];
2652                         palette_red[k] = (val << 8) | val;
2653                         val = vc->vc_palette[j++];
2654                         palette_green[k] = (val << 8) | val;
2655                         val = vc->vc_palette[j++];
2656                         palette_blue[k] = (val << 8) | val;
2657                 }
2658                 palette_cmap.len = 16;
2659                 palette_cmap.start = 0;
2660         /*
2661          * If framebuffer is capable of less than 16 colors,
2662          * use default palette of fbcon.
2663          */
2664         } else
2665                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2666
2667         return fb_set_cmap(&palette_cmap, info);
2668 }
2669
2670 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2671 {
2672         unsigned long p;
2673         int line;
2674
2675         if (vc->vc_num != fg_console || !softback_lines)
2676                 return (u16 *) (vc->vc_origin + offset);
2677         line = offset / vc->vc_size_row;
2678         if (line >= softback_lines)
2679                 return (u16 *) (vc->vc_origin + offset -
2680                                 softback_lines * vc->vc_size_row);
2681         p = softback_curr + offset;
2682         if (p >= softback_end)
2683                 p += softback_buf - softback_end;
2684         return (u16 *) p;
2685 }
2686
2687 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2688                                  int *px, int *py)
2689 {
2690         unsigned long ret;
2691         int x, y;
2692
2693         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2694                 unsigned long offset = (pos - vc->vc_origin) / 2;
2695
2696                 x = offset % vc->vc_cols;
2697                 y = offset / vc->vc_cols;
2698                 if (vc->vc_num == fg_console)
2699                         y += softback_lines;
2700                 ret = pos + (vc->vc_cols - x) * 2;
2701         } else if (vc->vc_num == fg_console && softback_lines) {
2702                 unsigned long offset = pos - softback_curr;
2703
2704                 if (pos < softback_curr)
2705                         offset += softback_end - softback_buf;
2706                 offset /= 2;
2707                 x = offset % vc->vc_cols;
2708                 y = offset / vc->vc_cols;
2709                 ret = pos + (vc->vc_cols - x) * 2;
2710                 if (ret == softback_end)
2711                         ret = softback_buf;
2712                 if (ret == softback_in)
2713                         ret = vc->vc_origin;
2714         } else {
2715                 /* Should not happen */
2716                 x = y = 0;
2717                 ret = vc->vc_origin;
2718         }
2719         if (px)
2720                 *px = x;
2721         if (py)
2722                 *py = y;
2723         return ret;
2724 }
2725
2726 /* As we might be inside of softback, we may work with non-contiguous buffer,
2727    that's why we have to use a separate routine. */
2728 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2729 {
2730         while (cnt--) {
2731                 u16 a = scr_readw(p);
2732                 if (!vc->vc_can_do_color)
2733                         a ^= 0x0800;
2734                 else if (vc->vc_hi_font_mask == 0x100)
2735                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2736                             (((a) & 0x0e00) << 4);
2737                 else
2738                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2739                             (((a) & 0x0700) << 4);
2740                 scr_writew(a, p++);
2741                 if (p == (u16 *) softback_end)
2742                         p = (u16 *) softback_buf;
2743                 if (p == (u16 *) softback_in)
2744                         p = (u16 *) vc->vc_origin;
2745         }
2746 }
2747
2748 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2749 {
2750         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2751         struct fbcon_ops *ops = info->fbcon_par;
2752         struct display *disp = &fb_display[fg_console];
2753         int offset, limit, scrollback_old;
2754
2755         if (softback_top) {
2756                 if (vc->vc_num != fg_console)
2757                         return 0;
2758                 if (vc->vc_mode != KD_TEXT || !lines)
2759                         return 0;
2760                 if (logo_shown >= 0) {
2761                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2762
2763                         if (conp2->vc_top == logo_lines
2764                             && conp2->vc_bottom == conp2->vc_rows)
2765                                 conp2->vc_top = 0;
2766                         if (logo_shown == vc->vc_num) {
2767                                 unsigned long p, q;
2768                                 int i;
2769
2770                                 p = softback_in;
2771                                 q = vc->vc_origin +
2772                                     logo_lines * vc->vc_size_row;
2773                                 for (i = 0; i < logo_lines; i++) {
2774                                         if (p == softback_top)
2775                                                 break;
2776                                         if (p == softback_buf)
2777                                                 p = softback_end;
2778                                         p -= vc->vc_size_row;
2779                                         q -= vc->vc_size_row;
2780                                         scr_memcpyw((u16 *) q, (u16 *) p,
2781                                                     vc->vc_size_row);
2782                                 }
2783                                 softback_in = softback_curr = p;
2784                                 update_region(vc, vc->vc_origin,
2785                                               logo_lines * vc->vc_cols);
2786                         }
2787                         logo_shown = FBCON_LOGO_CANSHOW;
2788                 }
2789                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2790                 fbcon_redraw_softback(vc, disp, lines);
2791                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2792                 return 0;
2793         }
2794
2795         if (!scrollback_phys_max)
2796                 return -ENOSYS;
2797
2798         scrollback_old = scrollback_current;
2799         scrollback_current -= lines;
2800         if (scrollback_current < 0)
2801                 scrollback_current = 0;
2802         else if (scrollback_current > scrollback_max)
2803                 scrollback_current = scrollback_max;
2804         if (scrollback_current == scrollback_old)
2805                 return 0;
2806
2807         if (fbcon_is_inactive(vc, info))
2808                 return 0;
2809
2810         fbcon_cursor(vc, CM_ERASE);
2811
2812         offset = disp->yscroll - scrollback_current;
2813         limit = disp->vrows;
2814         switch (disp->scrollmode) {
2815         case SCROLL_WRAP_MOVE:
2816                 info->var.vmode |= FB_VMODE_YWRAP;
2817                 break;
2818         case SCROLL_PAN_MOVE:
2819         case SCROLL_PAN_REDRAW:
2820                 limit -= vc->vc_rows;
2821                 info->var.vmode &= ~FB_VMODE_YWRAP;
2822                 break;
2823         }
2824         if (offset < 0)
2825                 offset += limit;
2826         else if (offset >= limit)
2827                 offset -= limit;
2828
2829         ops->var.xoffset = 0;
2830         ops->var.yoffset = offset * vc->vc_font.height;
2831         ops->update_start(info);
2832
2833         if (!scrollback_current)
2834                 fbcon_cursor(vc, CM_DRAW);
2835         return 0;
2836 }
2837
2838 static int fbcon_set_origin(struct vc_data *vc)
2839 {
2840         if (softback_lines)
2841                 fbcon_scrolldelta(vc, softback_lines);
2842         return 0;
2843 }
2844
2845 static void fbcon_suspended(struct fb_info *info)
2846 {
2847         struct vc_data *vc = NULL;
2848         struct fbcon_ops *ops = info->fbcon_par;
2849
2850         if (!ops || ops->currcon < 0)
2851                 return;
2852         vc = vc_cons[ops->currcon].d;
2853
2854         /* Clear cursor, restore saved data */
2855         fbcon_cursor(vc, CM_ERASE);
2856 }
2857
2858 static void fbcon_resumed(struct fb_info *info)
2859 {
2860         struct vc_data *vc;
2861         struct fbcon_ops *ops = info->fbcon_par;
2862
2863         if (!ops || ops->currcon < 0)
2864                 return;
2865         vc = vc_cons[ops->currcon].d;
2866
2867         update_screen(vc);
2868 }
2869
2870 static void fbcon_modechanged(struct fb_info *info)
2871 {
2872         struct fbcon_ops *ops = info->fbcon_par;
2873         struct vc_data *vc;
2874         struct display *p;
2875         int rows, cols;
2876
2877         if (!ops || ops->currcon < 0)
2878                 return;
2879         vc = vc_cons[ops->currcon].d;
2880         if (vc->vc_mode != KD_TEXT ||
2881             registered_fb[con2fb_map[ops->currcon]] != info)
2882                 return;
2883
2884         p = &fb_display[vc->vc_num];
2885         set_blitting_type(vc, info);
2886
2887         if (CON_IS_VISIBLE(vc)) {
2888                 var_to_display(p, &info->var, info);
2889                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2890                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2891                 cols /= vc->vc_font.width;
2892                 rows /= vc->vc_font.height;
2893                 vc_resize(vc, cols, rows);
2894                 updatescrollmode(p, info, vc);
2895                 scrollback_max = 0;
2896                 scrollback_current = 0;
2897
2898                 if (!fbcon_is_inactive(vc, info)) {
2899                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2900                     ops->update_start(info);
2901                 }
2902
2903                 fbcon_set_palette(vc, color_table);
2904                 update_screen(vc);
2905                 if (softback_buf)
2906                         fbcon_update_softback(vc);
2907         }
2908 }
2909
2910 static void fbcon_set_all_vcs(struct fb_info *info)
2911 {
2912         struct fbcon_ops *ops = info->fbcon_par;
2913         struct vc_data *vc;
2914         struct display *p;
2915         int i, rows, cols, fg = -1;
2916
2917         if (!ops || ops->currcon < 0)
2918                 return;
2919
2920         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2921                 vc = vc_cons[i].d;
2922                 if (!vc || vc->vc_mode != KD_TEXT ||
2923                     registered_fb[con2fb_map[i]] != info)
2924                         continue;
2925
2926                 if (CON_IS_VISIBLE(vc)) {
2927                         fg = i;
2928                         continue;
2929                 }
2930
2931                 p = &fb_display[vc->vc_num];
2932                 set_blitting_type(vc, info);
2933                 var_to_display(p, &info->var, info);
2934                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2935                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2936                 cols /= vc->vc_font.width;
2937                 rows /= vc->vc_font.height;
2938                 vc_resize(vc, cols, rows);
2939         }
2940
2941         if (fg != -1)
2942                 fbcon_modechanged(info);
2943 }
2944
2945 static int fbcon_mode_deleted(struct fb_info *info,
2946                               struct fb_videomode *mode)
2947 {
2948         struct fb_info *fb_info;
2949         struct display *p;
2950         int i, j, found = 0;
2951
2952         /* before deletion, ensure that mode is not in use */
2953         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2954                 j = con2fb_map[i];
2955                 if (j == -1)
2956                         continue;
2957                 fb_info = registered_fb[j];
2958                 if (fb_info != info)
2959                         continue;
2960                 p = &fb_display[i];
2961                 if (!p || !p->mode)
2962                         continue;
2963                 if (fb_mode_is_equal(p->mode, mode)) {
2964                         found = 1;
2965                         break;
2966                 }
2967         }
2968         return found;
2969 }
2970
2971 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
2972 static int fbcon_unbind(void)
2973 {
2974         int ret;
2975
2976         ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
2977                                 fbcon_is_default);
2978
2979         if (!ret)
2980                 fbcon_has_console_bind = 0;
2981
2982         return ret;
2983 }
2984 #else
2985 static inline int fbcon_unbind(void)
2986 {
2987         return -EINVAL;
2988 }
2989 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
2990
2991 static int fbcon_fb_unbind(int idx)
2992 {
2993         int i, new_idx = -1, ret = 0;
2994
2995         if (!fbcon_has_console_bind)
2996                 return 0;
2997
2998         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2999                 if (con2fb_map[i] != idx &&
3000                     con2fb_map[i] != -1) {
3001                         new_idx = i;
3002                         break;
3003                 }
3004         }
3005
3006         if (new_idx != -1) {
3007                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3008                         if (con2fb_map[i] == idx)
3009                                 set_con2fb_map(i, new_idx, 0);
3010                 }
3011         } else
3012                 ret = fbcon_unbind();
3013
3014         return ret;
3015 }
3016
3017 static int fbcon_fb_unregistered(struct fb_info *info)
3018 {
3019         int i, idx;
3020
3021         idx = info->node;
3022         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3023                 if (con2fb_map[i] == idx)
3024                         con2fb_map[i] = -1;
3025         }
3026
3027         if (idx == info_idx) {
3028                 info_idx = -1;
3029
3030                 for (i = 0; i < FB_MAX; i++) {
3031                         if (registered_fb[i] != NULL) {
3032                                 info_idx = i;
3033                                 break;
3034                         }
3035                 }
3036         }
3037
3038         if (info_idx != -1) {
3039                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3040                         if (con2fb_map[i] == -1)
3041                                 con2fb_map[i] = info_idx;
3042                 }
3043         }
3044
3045         if (primary_device == idx)
3046                 primary_device = -1;
3047
3048         if (!num_registered_fb)
3049                 unregister_con_driver(&fb_con);
3050
3051         return 0;
3052 }
3053
3054 static void fbcon_remap_all(int idx)
3055 {
3056         int i;
3057         for (i = first_fb_vc; i <= last_fb_vc; i++)
3058                 set_con2fb_map(i, idx, 0);
3059
3060         if (con_is_bound(&fb_con)) {
3061                 printk(KERN_INFO "fbcon: Remapping primary device, "
3062                        "fb%i, to tty %i-%i\n", idx,
3063                        first_fb_vc + 1, last_fb_vc + 1);
3064                 info_idx = idx;
3065         }
3066 }
3067
3068 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3069 static void fbcon_select_primary(struct fb_info *info)
3070 {
3071         if (!map_override && primary_device == -1 &&
3072             fb_is_primary_device(info)) {
3073                 int i;
3074
3075                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3076                        info->fix.id, info->node);
3077                 primary_device = info->node;
3078
3079                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3080                         con2fb_map_boot[i] = primary_device;
3081
3082                 if (con_is_bound(&fb_con)) {
3083                         printk(KERN_INFO "fbcon: Remapping primary device, "
3084                                "fb%i, to tty %i-%i\n", info->node,
3085                                first_fb_vc + 1, last_fb_vc + 1);
3086                         info_idx = primary_device;
3087                 }
3088         }
3089
3090 }
3091 #else
3092 static inline void fbcon_select_primary(struct fb_info *info)
3093 {
3094         return;
3095 }
3096 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3097
3098 static int fbcon_fb_registered(struct fb_info *info)
3099 {
3100         int ret = 0, i, idx;
3101
3102         idx = info->node;
3103         fbcon_select_primary(info);
3104
3105         if (info_idx == -1) {
3106                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3107                         if (con2fb_map_boot[i] == idx) {
3108                                 info_idx = idx;
3109                                 break;
3110                         }
3111                 }
3112
3113                 if (info_idx != -1)
3114                         ret = fbcon_takeover(1);
3115         } else {
3116                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3117                         if (con2fb_map_boot[i] == idx)
3118                                 set_con2fb_map(i, idx, 0);
3119                 }
3120         }
3121
3122         return ret;
3123 }
3124
3125 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3126 {
3127         struct fbcon_ops *ops = info->fbcon_par;
3128         struct vc_data *vc;
3129
3130         if (!ops || ops->currcon < 0)
3131                 return;
3132
3133         vc = vc_cons[ops->currcon].d;
3134         if (vc->vc_mode != KD_TEXT ||
3135                         registered_fb[con2fb_map[ops->currcon]] != info)
3136                 return;
3137
3138         if (CON_IS_VISIBLE(vc)) {
3139                 if (blank)
3140                         do_blank_screen(0);
3141                 else
3142                         do_unblank_screen(0);
3143         }
3144         ops->blank_state = blank;
3145 }
3146
3147 static void fbcon_new_modelist(struct fb_info *info)
3148 {
3149         int i;
3150         struct vc_data *vc;
3151         struct fb_var_screeninfo var;
3152         const struct fb_videomode *mode;
3153
3154         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3155                 if (registered_fb[con2fb_map[i]] != info)
3156                         continue;
3157                 if (!fb_display[i].mode)
3158                         continue;
3159                 vc = vc_cons[i].d;
3160                 display_to_var(&var, &fb_display[i]);
3161                 mode = fb_find_nearest_mode(fb_display[i].mode,
3162                                             &info->modelist);
3163                 fb_videomode_to_var(&var, mode);
3164                 fbcon_set_disp(info, &var, vc->vc_num);
3165         }
3166 }
3167
3168 static void fbcon_get_requirement(struct fb_info *info,
3169                                   struct fb_blit_caps *caps)
3170 {
3171         struct vc_data *vc;
3172         struct display *p;
3173
3174         if (caps->flags) {
3175                 int i, charcnt;
3176
3177                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3178                         vc = vc_cons[i].d;
3179                         if (vc && vc->vc_mode == KD_TEXT &&
3180                             info->node == con2fb_map[i]) {
3181                                 p = &fb_display[i];
3182                                 caps->x |= 1 << (vc->vc_font.width - 1);
3183                                 caps->y |= 1 << (vc->vc_font.height - 1);
3184                                 charcnt = (p->userfont) ?
3185                                         FNTCHARCNT(p->fontdata) : 256;
3186                                 if (caps->len < charcnt)
3187                                         caps->len = charcnt;
3188                         }
3189                 }
3190         } else {
3191                 vc = vc_cons[fg_console].d;
3192
3193                 if (vc && vc->vc_mode == KD_TEXT &&
3194                     info->node == con2fb_map[fg_console]) {
3195                         p = &fb_display[fg_console];
3196                         caps->x = 1 << (vc->vc_font.width - 1);
3197                         caps->y = 1 << (vc->vc_font.height - 1);
3198                         caps->len = (p->userfont) ?
3199                                 FNTCHARCNT(p->fontdata) : 256;
3200                 }
3201         }
3202 }
3203
3204 static int fbcon_event_notify(struct notifier_block *self,
3205                               unsigned long action, void *data)
3206 {
3207         struct fb_event *event = data;
3208         struct fb_info *info = event->info;
3209         struct fb_videomode *mode;
3210         struct fb_con2fbmap *con2fb;
3211         struct fb_blit_caps *caps;
3212         int idx, ret = 0;
3213
3214         /*
3215          * ignore all events except driver registration and deregistration
3216          * if fbcon is not active
3217          */
3218         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3219                                   action == FB_EVENT_FB_UNREGISTERED))
3220                 goto done;
3221
3222         switch(action) {
3223         case FB_EVENT_SUSPEND:
3224                 fbcon_suspended(info);
3225                 break;
3226         case FB_EVENT_RESUME:
3227                 fbcon_resumed(info);
3228                 break;
3229         case FB_EVENT_MODE_CHANGE:
3230                 fbcon_modechanged(info);
3231                 break;
3232         case FB_EVENT_MODE_CHANGE_ALL:
3233                 fbcon_set_all_vcs(info);
3234                 break;
3235         case FB_EVENT_MODE_DELETE:
3236                 mode = event->data;
3237                 ret = fbcon_mode_deleted(info, mode);
3238                 break;
3239         case FB_EVENT_FB_UNBIND:
3240                 idx = info->node;
3241                 ret = fbcon_fb_unbind(idx);
3242                 break;
3243         case FB_EVENT_FB_REGISTERED:
3244                 ret = fbcon_fb_registered(info);
3245                 break;
3246         case FB_EVENT_FB_UNREGISTERED:
3247                 ret = fbcon_fb_unregistered(info);
3248                 break;
3249         case FB_EVENT_SET_CONSOLE_MAP:
3250                 con2fb = event->data;
3251                 ret = set_con2fb_map(con2fb->console - 1,
3252                                      con2fb->framebuffer, 1);
3253                 break;
3254         case FB_EVENT_GET_CONSOLE_MAP:
3255                 con2fb = event->data;
3256                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3257                 break;
3258         case FB_EVENT_BLANK:
3259                 fbcon_fb_blanked(info, *(int *)event->data);
3260                 break;
3261         case FB_EVENT_NEW_MODELIST:
3262                 fbcon_new_modelist(info);
3263                 break;
3264         case FB_EVENT_GET_REQ:
3265                 caps = event->data;
3266                 fbcon_get_requirement(info, caps);
3267                 break;
3268         case FB_EVENT_REMAP_ALL_CONSOLE:
3269                 idx = info->node;
3270                 fbcon_remap_all(idx);
3271                 break;
3272         }
3273 done:
3274         return ret;
3275 }
3276
3277 /*
3278  *  The console `switch' structure for the frame buffer based console
3279  */
3280
3281 static const struct consw fb_con = {
3282         .owner                  = THIS_MODULE,
3283         .con_startup            = fbcon_startup,
3284         .con_init               = fbcon_init,
3285         .con_deinit             = fbcon_deinit,
3286         .con_clear              = fbcon_clear,
3287         .con_putc               = fbcon_putc,
3288         .con_putcs              = fbcon_putcs,
3289         .con_cursor             = fbcon_cursor,
3290         .con_scroll             = fbcon_scroll,
3291         .con_bmove              = fbcon_bmove,
3292         .con_switch             = fbcon_switch,
3293         .con_blank              = fbcon_blank,
3294         .con_font_set           = fbcon_set_font,
3295         .con_font_get           = fbcon_get_font,
3296         .con_font_default       = fbcon_set_def_font,
3297         .con_font_copy          = fbcon_copy_font,
3298         .con_set_palette        = fbcon_set_palette,
3299         .con_scrolldelta        = fbcon_scrolldelta,
3300         .con_set_origin         = fbcon_set_origin,
3301         .con_invert_region      = fbcon_invert_region,
3302         .con_screen_pos         = fbcon_screen_pos,
3303         .con_getxy              = fbcon_getxy,
3304         .con_resize             = fbcon_resize,
3305         .con_debug_enter        = fbcon_debug_enter,
3306         .con_debug_leave        = fbcon_debug_leave,
3307 };
3308
3309 static struct notifier_block fbcon_event_notifier = {
3310         .notifier_call  = fbcon_event_notify,
3311 };
3312
3313 static ssize_t store_rotate(struct device *device,
3314                             struct device_attribute *attr, const char *buf,
3315                             size_t count)
3316 {
3317         struct fb_info *info;
3318         int rotate, idx;
3319         char **last = NULL;
3320
3321         if (fbcon_has_exited)
3322                 return count;
3323
3324         console_lock();
3325         idx = con2fb_map[fg_console];
3326
3327         if (idx == -1 || registered_fb[idx] == NULL)
3328                 goto err;
3329
3330         info = registered_fb[idx];
3331         rotate = simple_strtoul(buf, last, 0);
3332         fbcon_rotate(info, rotate);
3333 err:
3334         console_unlock();
3335         return count;
3336 }
3337
3338 static ssize_t store_rotate_all(struct device *device,
3339                                 struct device_attribute *attr,const char *buf,
3340                                 size_t count)
3341 {
3342         struct fb_info *info;
3343         int rotate, idx;
3344         char **last = NULL;
3345
3346         if (fbcon_has_exited)
3347                 return count;
3348
3349         console_lock();
3350         idx = con2fb_map[fg_console];
3351
3352         if (idx == -1 || registered_fb[idx] == NULL)
3353                 goto err;
3354
3355         info = registered_fb[idx];
3356         rotate = simple_strtoul(buf, last, 0);
3357         fbcon_rotate_all(info, rotate);
3358 err:
3359         console_unlock();
3360         return count;
3361 }
3362
3363 static ssize_t show_rotate(struct device *device,
3364                            struct device_attribute *attr,char *buf)
3365 {
3366         struct fb_info *info;
3367         int rotate = 0, idx;
3368
3369         if (fbcon_has_exited)
3370                 return 0;
3371
3372         console_lock();
3373         idx = con2fb_map[fg_console];
3374
3375         if (idx == -1 || registered_fb[idx] == NULL)
3376                 goto err;
3377
3378         info = registered_fb[idx];
3379         rotate = fbcon_get_rotate(info);
3380 err:
3381         console_unlock();
3382         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3383 }
3384
3385 static ssize_t show_cursor_blink(struct device *device,
3386                                  struct device_attribute *attr, char *buf)
3387 {
3388         struct fb_info *info;
3389         struct fbcon_ops *ops;
3390         int idx, blink = -1;
3391
3392         if (fbcon_has_exited)
3393                 return 0;
3394
3395         console_lock();
3396         idx = con2fb_map[fg_console];
3397
3398         if (idx == -1 || registered_fb[idx] == NULL)
3399                 goto err;
3400
3401         info = registered_fb[idx];
3402         ops = info->fbcon_par;
3403
3404         if (!ops)
3405                 goto err;
3406
3407         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3408 err:
3409         console_unlock();
3410         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3411 }
3412
3413 static ssize_t store_cursor_blink(struct device *device,
3414                                   struct device_attribute *attr,
3415                                   const char *buf, size_t count)
3416 {
3417         struct fb_info *info;
3418         int blink, idx;
3419         char **last = NULL;
3420
3421         if (fbcon_has_exited)
3422                 return count;
3423
3424         console_lock();
3425         idx = con2fb_map[fg_console];
3426
3427         if (idx == -1 || registered_fb[idx] == NULL)
3428                 goto err;
3429
3430         info = registered_fb[idx];
3431
3432         if (!info->fbcon_par)
3433                 goto err;
3434
3435         blink = simple_strtoul(buf, last, 0);
3436
3437         if (blink) {
3438                 fbcon_cursor_noblink = 0;
3439                 fbcon_add_cursor_timer(info);
3440         } else {
3441                 fbcon_cursor_noblink = 1;
3442                 fbcon_del_cursor_timer(info);
3443         }
3444
3445 err:
3446         console_unlock();
3447         return count;
3448 }
3449
3450 static struct device_attribute device_attrs[] = {
3451         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3452         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3453         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3454                store_cursor_blink),
3455 };
3456
3457 static int fbcon_init_device(void)
3458 {
3459         int i, error = 0;
3460
3461         fbcon_has_sysfs = 1;
3462
3463         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3464                 error = device_create_file(fbcon_device, &device_attrs[i]);
3465
3466                 if (error)
3467                         break;
3468         }
3469
3470         if (error) {
3471                 while (--i >= 0)
3472                         device_remove_file(fbcon_device, &device_attrs[i]);
3473
3474                 fbcon_has_sysfs = 0;
3475         }
3476
3477         return 0;
3478 }
3479
3480 static void fbcon_start(void)
3481 {
3482         if (num_registered_fb) {
3483                 int i;
3484
3485                 console_lock();
3486
3487                 for (i = 0; i < FB_MAX; i++) {
3488                         if (registered_fb[i] != NULL) {
3489                                 info_idx = i;
3490                                 break;
3491                         }
3492                 }
3493
3494                 console_unlock();
3495                 fbcon_takeover(0);
3496         }
3497 }
3498
3499 static void fbcon_exit(void)
3500 {
3501         struct fb_info *info;
3502         int i, j, mapped;
3503
3504         if (fbcon_has_exited)
3505                 return;
3506
3507         kfree((void *)softback_buf);
3508         softback_buf = 0UL;
3509
3510         for (i = 0; i < FB_MAX; i++) {
3511                 int pending = 0;
3512
3513                 mapped = 0;
3514                 info = registered_fb[i];
3515
3516                 if (info == NULL)
3517                         continue;
3518
3519                 if (info->queue.func)
3520                         pending = cancel_work_sync(&info->queue);
3521                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3522                         "no"));
3523
3524                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3525                         if (con2fb_map[j] == i)
3526                                 mapped = 1;
3527                 }
3528
3529                 if (mapped) {
3530                         if (info->fbops->fb_release)
3531                                 info->fbops->fb_release(info, 0);
3532                         module_put(info->fbops->owner);
3533
3534                         if (info->fbcon_par) {
3535                                 struct fbcon_ops *ops = info->fbcon_par;
3536
3537                                 fbcon_del_cursor_timer(info);
3538                                 kfree(ops->cursor_src);
3539                                 kfree(info->fbcon_par);
3540                                 info->fbcon_par = NULL;
3541                         }
3542
3543                         if (info->queue.func == fb_flashcursor)
3544                                 info->queue.func = NULL;
3545                 }
3546         }
3547
3548         fbcon_has_exited = 1;
3549 }
3550
3551 static int __init fb_console_init(void)
3552 {
3553         int i;
3554
3555         console_lock();
3556         fb_register_client(&fbcon_event_notifier);
3557         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3558                                      "fbcon");
3559
3560         if (IS_ERR(fbcon_device)) {
3561                 printk(KERN_WARNING "Unable to create device "
3562                        "for fbcon; errno = %ld\n",
3563                        PTR_ERR(fbcon_device));
3564                 fbcon_device = NULL;
3565         } else
3566                 fbcon_init_device();
3567
3568         for (i = 0; i < MAX_NR_CONSOLES; i++)
3569                 con2fb_map[i] = -1;
3570
3571         console_unlock();
3572         fbcon_start();
3573         return 0;
3574 }
3575
3576 module_init(fb_console_init);
3577
3578 #ifdef MODULE
3579
3580 static void __exit fbcon_deinit_device(void)
3581 {
3582         int i;
3583
3584         if (fbcon_has_sysfs) {
3585                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3586                         device_remove_file(fbcon_device, &device_attrs[i]);
3587
3588                 fbcon_has_sysfs = 0;
3589         }
3590 }
3591
3592 static void __exit fb_console_exit(void)
3593 {
3594         console_lock();
3595         fb_unregister_client(&fbcon_event_notifier);
3596         fbcon_deinit_device();
3597         device_destroy(fb_class, MKDEV(0, 0));
3598         fbcon_exit();
3599         console_unlock();
3600         unregister_con_driver(&fb_con);
3601 }
3602
3603 module_exit(fb_console_exit);
3604
3605 #endif
3606
3607 MODULE_LICENSE("GPL");