drivers/video/fbdev/core/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/fbcon.h>
  72 #include <linux/vt_kern.h>
  73 #include <linux/selection.h>
  74 #include <linux/font.h>
  75 #include <linux/smp.h>
  76 #include <linux/init.h>
  77 #include <linux/interrupt.h>
  78 #include <linux/crc32.h> /* For counting font checksums */
  79 #include <asm/fb.h>
  80 #include <asm/irq.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 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 133 static bool deferred_takeover = true;
 134 #else
 135 #define deferred_takeover false
 136 #endif
 137
 138 /* font data */
 139 static char fontname[40];
 140
 141 /* current fb_info */
 142 static int info_idx = -1;
 143
 144 /* console rotation */
 145 static int initial_rotation = -1;
 146 static int fbcon_has_sysfs;
 147 static int margin_color;
 148
 149 static const struct consw fb_con;
 150
 151 #define CM_SOFTBACK     (8)
 152
 153 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 154
 155 static int fbcon_set_origin(struct vc_data *);
 156
 157 static int fbcon_cursor_noblink;
 158
 159 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 160
 161 /*
 162  *  Interface used by the world
 163  */
 164
 165 static const char *fbcon_startup(void);
 166 static void fbcon_init(struct vc_data *vc, int init);
 167 static void fbcon_deinit(struct vc_data *vc);
 168 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 169                         int width);
 170 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 171 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 172                         int count, int ypos, int xpos);
 173 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 174 static void fbcon_cursor(struct vc_data *vc, int mode);
 175 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 176                         int height, int width);
 177 static int fbcon_switch(struct vc_data *vc);
 178 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 179 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
 180
 181 /*
 182  *  Internal routines
 183  */
 184 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 185 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 186 static __inline__ void ypan_up(struct vc_data *vc, int count);
 187 static __inline__ void ypan_down(struct vc_data *vc, int count);
 188 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 189                             int dy, int dx, int height, int width, u_int y_break);
 190 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 191                            int unit);
 192 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 193                               int line, int count, int dy);
 194 static void fbcon_modechanged(struct fb_info *info);
 195 static void fbcon_set_all_vcs(struct fb_info *info);
 196 static void fbcon_start(void);
 197 static void fbcon_exit(void);
 198 static struct device *fbcon_device;
 199
 200 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 201 static inline void fbcon_set_rotation(struct fb_info *info)
 202 {
 203         struct fbcon_ops *ops = info->fbcon_par;
 204
 205         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 206             ops->p->con_rotate < 4)
 207                 ops->rotate = ops->p->con_rotate;
 208         else
 209                 ops->rotate = 0;
 210 }
 211
 212 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 213 {
 214         struct fbcon_ops *ops= info->fbcon_par;
 215         struct fb_info *fb_info;
 216
 217         if (!ops || ops->currcon == -1)
 218                 return;
 219
 220         fb_info = registered_fb[con2fb_map[ops->currcon]];
 221
 222         if (info == fb_info) {
 223                 struct display *p = &fb_display[ops->currcon];
 224
 225                 if (rotate < 4)
 226                         p->con_rotate = rotate;
 227                 else
 228                         p->con_rotate = 0;
 229
 230                 fbcon_modechanged(info);
 231         }
 232 }
 233
 234 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 235 {
 236         struct fbcon_ops *ops = info->fbcon_par;
 237         struct vc_data *vc;
 238         struct display *p;
 239         int i;
 240
 241         if (!ops || ops->currcon < 0 || rotate > 3)
 242                 return;
 243
 244         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 245                 vc = vc_cons[i].d;
 246                 if (!vc || vc->vc_mode != KD_TEXT ||
 247                     registered_fb[con2fb_map[i]] != info)
 248                         continue;
 249
 250                 p = &fb_display[vc->vc_num];
 251                 p->con_rotate = rotate;
 252         }
 253
 254         fbcon_set_all_vcs(info);
 255 }
 256 #else
 257 static inline void fbcon_set_rotation(struct fb_info *info)
 258 {
 259         struct fbcon_ops *ops = info->fbcon_par;
 260
 261         ops->rotate = FB_ROTATE_UR;
 262 }
 263
 264 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 265 {
 266         return;
 267 }
 268
 269 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 270 {
 271         return;
 272 }
 273 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 274
 275 static int fbcon_get_rotate(struct fb_info *info)
 276 {
 277         struct fbcon_ops *ops = info->fbcon_par;
 278
 279         return (ops) ? ops->rotate : 0;
 280 }
 281
 282 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 283 {
 284         struct fbcon_ops *ops = info->fbcon_par;
 285
 286         return (info->state != FBINFO_STATE_RUNNING ||
 287                 vc->vc_mode != KD_TEXT || ops->graphics);
 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 vc_data *vc = NULL;
 374         int c;
 375         int mode;
 376         int ret;
 377
 378         /* FIXME: we should sort out the unbind locking instead */
 379         /* instead we just fail to flash the cursor if we can't get
 380          * the lock instead of blocking fbcon deinit */
 381         ret = console_trylock();
 382         if (ret == 0)
 383                 return;
 384
 385         if (ops && ops->currcon != -1)
 386                 vc = vc_cons[ops->currcon].d;
 387
 388         if (!vc || !con_is_visible(vc) ||
 389             registered_fb[con2fb_map[vc->vc_num]] != info ||
 390             vc->vc_deccm != 1) {
 391                 console_unlock();
 392                 return;
 393         }
 394
 395         c = scr_readw((u16 *) vc->vc_pos);
 396         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 397                 CM_ERASE : CM_DRAW;
 398         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 399                     get_color(vc, info, c, 0));
 400         console_unlock();
 401 }
 402
 403 static void cursor_timer_handler(struct timer_list *t)
 404 {
 405         struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
 406         struct fb_info *info = ops->info;
 407
 408         queue_work(system_power_efficient_wq, &info->queue);
 409         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 410 }
 411
 412 static void fbcon_add_cursor_timer(struct fb_info *info)
 413 {
 414         struct fbcon_ops *ops = info->fbcon_par;
 415
 416         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 417             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 418             !fbcon_cursor_noblink) {
 419                 if (!info->queue.func)
 420                         INIT_WORK(&info->queue, fb_flashcursor);
 421
 422                 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
 423                 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 424                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 425         }
 426 }
 427
 428 static void fbcon_del_cursor_timer(struct fb_info *info)
 429 {
 430         struct fbcon_ops *ops = info->fbcon_par;
 431
 432         if (info->queue.func == fb_flashcursor &&
 433             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 434                 del_timer_sync(&ops->cursor_timer);
 435                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 436         }
 437 }
 438
 439 #ifndef MODULE
 440 static int __init fb_console_setup(char *this_opt)
 441 {
 442         char *options;
 443         int i, j;
 444
 445         if (!this_opt || !*this_opt)
 446                 return 1;
 447
 448         while ((options = strsep(&this_opt, ",")) != NULL) {
 449                 if (!strncmp(options, "font:", 5)) {
 450                         strlcpy(fontname, options + 5, sizeof(fontname));
 451                         continue;
 452                 }
 453
 454                 if (!strncmp(options, "scrollback:", 11)) {
 455                         options += 11;
 456                         if (*options) {
 457                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 458                                 if (*options == 'k' || *options == 'K') {
 459                                         fbcon_softback_size *= 1024;
 460                                 }
 461                         }
 462                         continue;
 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                         continue;
 478                 }
 479
 480                 if (!strncmp(options, "vc:", 3)) {
 481                         options += 3;
 482                         if (*options)
 483                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 484                         if (first_fb_vc < 0)
 485                                 first_fb_vc = 0;
 486                         if (*options++ == '-')
 487                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 488                         fbcon_is_default = 0;
 489                         continue;
 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                         continue;
 499                 }
 500
 501                 if (!strncmp(options, "margin:", 7)) {
 502                         options += 7;
 503                         if (*options)
 504                                 margin_color = simple_strtoul(options, &options, 0);
 505                         continue;
 506                 }
 507 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 508                 if (!strcmp(options, "nodefer")) {
 509                         deferred_takeover = false;
 510                         continue;
 511                 }
 512 #endif
 513
 514                 if (!strncmp(options, "logo-pos:", 9)) {
 515                         options += 9;
 516                         if (!strcmp(options, "center"))
 517                                 fb_center_logo = true;
 518                         continue;
 519                 }
 520         }
 521         return 1;
 522 }
 523
 524 __setup("fbcon=", fb_console_setup);
 525 #endif
 526
 527 static int search_fb_in_map(int idx)
 528 {
 529         int i, retval = 0;
 530
 531         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 532                 if (con2fb_map[i] == idx)
 533                         retval = 1;
 534         }
 535         return retval;
 536 }
 537
 538 static int search_for_mapped_con(void)
 539 {
 540         int i, retval = 0;
 541
 542         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 543                 if (con2fb_map[i] != -1)
 544                         retval = 1;
 545         }
 546         return retval;
 547 }
 548
 549 static int do_fbcon_takeover(int show_logo)
 550 {
 551         int err, i;
 552
 553         if (!num_registered_fb)
 554                 return -ENODEV;
 555
 556         if (!show_logo)
 557                 logo_shown = FBCON_LOGO_DONTSHOW;
 558
 559         for (i = first_fb_vc; i <= last_fb_vc; i++)
 560                 con2fb_map[i] = info_idx;
 561
 562         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 563                                 fbcon_is_default);
 564
 565         if (err) {
 566                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 567                         con2fb_map[i] = -1;
 568                 info_idx = -1;
 569         } else {
 570                 fbcon_has_console_bind = 1;
 571         }
 572
 573         return err;
 574 }
 575
 576 #ifdef MODULE
 577 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 578                                int cols, int rows, int new_cols, int new_rows)
 579 {
 580         logo_shown = FBCON_LOGO_DONTSHOW;
 581 }
 582 #else
 583 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 584                                int cols, int rows, int new_cols, int new_rows)
 585 {
 586         /* Need to make room for the logo */
 587         struct fbcon_ops *ops = info->fbcon_par;
 588         int cnt, erase = vc->vc_video_erase_char, step;
 589         unsigned short *save = NULL, *r, *q;
 590         int logo_height;
 591
 592         if (info->fbops->owner) {
 593                 logo_shown = FBCON_LOGO_DONTSHOW;
 594                 return;
 595         }
 596
 597         /*
 598          * remove underline attribute from erase character
 599          * if black and white framebuffer.
 600          */
 601         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 602                 erase &= ~0x400;
 603         logo_height = fb_prepare_logo(info, ops->rotate);
 604         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 605         q = (unsigned short *) (vc->vc_origin +
 606                                 vc->vc_size_row * rows);
 607         step = logo_lines * cols;
 608         for (r = q - logo_lines * cols; r < q; r++)
 609                 if (scr_readw(r) != vc->vc_video_erase_char)
 610                         break;
 611         if (r != q && new_rows >= rows + logo_lines) {
 612                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 613                                GFP_KERNEL);
 614                 if (save) {
 615                         int i = cols < new_cols ? cols : new_cols;
 616                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 617                         r = q - step;
 618                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 619                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 620                         r = q;
 621                 }
 622         }
 623         if (r == q) {
 624                 /* We can scroll screen down */
 625                 r = q - step - cols;
 626                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 627                         scr_memcpyw(r + step, r, vc->vc_size_row);
 628                         r -= cols;
 629                 }
 630                 if (!save) {
 631                         int lines;
 632                         if (vc->vc_y + logo_lines >= rows)
 633                                 lines = rows - vc->vc_y - 1;
 634                         else
 635                                 lines = logo_lines;
 636                         vc->vc_y += lines;
 637                         vc->vc_pos += lines * vc->vc_size_row;
 638                 }
 639         }
 640         scr_memsetw((unsigned short *) vc->vc_origin,
 641                     erase,
 642                     vc->vc_size_row * logo_lines);
 643
 644         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 645                 fbcon_clear_margins(vc, 0);
 646                 update_screen(vc);
 647         }
 648
 649         if (save) {
 650                 q = (unsigned short *) (vc->vc_origin +
 651                                         vc->vc_size_row *
 652                                         rows);
 653                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 654                 vc->vc_y += logo_lines;
 655                 vc->vc_pos += logo_lines * vc->vc_size_row;
 656                 kfree(save);
 657         }
 658
 659         if (logo_lines > vc->vc_bottom) {
 660                 logo_shown = FBCON_LOGO_CANSHOW;
 661                 printk(KERN_INFO
 662                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 663         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 664                 logo_shown = FBCON_LOGO_DRAW;
 665                 vc->vc_top = logo_lines;
 666         }
 667 }
 668 #endif /* MODULE */
 669
 670 #ifdef CONFIG_FB_TILEBLITTING
 671 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 672 {
 673         struct fbcon_ops *ops = info->fbcon_par;
 674
 675         ops->p = &fb_display[vc->vc_num];
 676
 677         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 678                 fbcon_set_tileops(vc, info);
 679         else {
 680                 fbcon_set_rotation(info);
 681                 fbcon_set_bitops(ops);
 682         }
 683 }
 684
 685 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 686 {
 687         int err = 0;
 688
 689         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 690             info->tileops->fb_get_tilemax(info) < charcount)
 691                 err = 1;
 692
 693         return err;
 694 }
 695 #else
 696 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 697 {
 698         struct fbcon_ops *ops = info->fbcon_par;
 699
 700         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 701         ops->p = &fb_display[vc->vc_num];
 702         fbcon_set_rotation(info);
 703         fbcon_set_bitops(ops);
 704 }
 705
 706 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 707 {
 708         return 0;
 709 }
 710
 711 #endif /* CONFIG_MISC_TILEBLITTING */
 712
 713
 714 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 715                                   int unit, int oldidx)
 716 {
 717         struct fbcon_ops *ops = NULL;
 718         int err = 0;
 719
 720         if (!try_module_get(info->fbops->owner))
 721                 err = -ENODEV;
 722
 723         if (!err && info->fbops->fb_open &&
 724             info->fbops->fb_open(info, 0))
 725                 err = -ENODEV;
 726
 727         if (!err) {
 728                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 729                 if (!ops)
 730                         err = -ENOMEM;
 731         }
 732
 733         if (!err) {
 734                 ops->cur_blink_jiffies = HZ / 5;
 735                 ops->info = info;
 736                 info->fbcon_par = ops;
 737
 738                 if (vc)
 739                         set_blitting_type(vc, info);
 740         }
 741
 742         if (err) {
 743                 con2fb_map[unit] = oldidx;
 744                 module_put(info->fbops->owner);
 745         }
 746
 747         return err;
 748 }
 749
 750 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 751                                   struct fb_info *newinfo, int unit,
 752                                   int oldidx, int found)
 753 {
 754         struct fbcon_ops *ops = oldinfo->fbcon_par;
 755         int err = 0, ret;
 756
 757         if (oldinfo->fbops->fb_release &&
 758             oldinfo->fbops->fb_release(oldinfo, 0)) {
 759                 con2fb_map[unit] = oldidx;
 760                 if (!found && newinfo->fbops->fb_release)
 761                         newinfo->fbops->fb_release(newinfo, 0);
 762                 if (!found)
 763                         module_put(newinfo->fbops->owner);
 764                 err = -ENODEV;
 765         }
 766
 767         if (!err) {
 768                 fbcon_del_cursor_timer(oldinfo);
 769                 kfree(ops->cursor_state.mask);
 770                 kfree(ops->cursor_data);
 771                 kfree(ops->cursor_src);
 772                 kfree(ops->fontbuffer);
 773                 kfree(oldinfo->fbcon_par);
 774                 oldinfo->fbcon_par = NULL;
 775                 module_put(oldinfo->fbops->owner);
 776                 /*
 777                   If oldinfo and newinfo are driving the same hardware,
 778                   the fb_release() method of oldinfo may attempt to
 779                   restore the hardware state.  This will leave the
 780                   newinfo in an undefined state. Thus, a call to
 781                   fb_set_par() may be needed for the newinfo.
 782                 */
 783                 if (newinfo && newinfo->fbops->fb_set_par) {
 784                         ret = newinfo->fbops->fb_set_par(newinfo);
 785
 786                         if (ret)
 787                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 788                                         "detected unhandled fb_set_par error, "
 789                                         "error code %d\n", ret);
 790                 }
 791         }
 792
 793         return err;
 794 }
 795
 796 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 797                                 int unit, int show_logo)
 798 {
 799         struct fbcon_ops *ops = info->fbcon_par;
 800         int ret;
 801
 802         ops->currcon = fg_console;
 803
 804         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 805                 ret = info->fbops->fb_set_par(info);
 806
 807                 if (ret)
 808                         printk(KERN_ERR "con2fb_init_display: detected "
 809                                 "unhandled fb_set_par error, "
 810                                 "error code %d\n", ret);
 811         }
 812
 813         ops->flags |= FBCON_FLAGS_INIT;
 814         ops->graphics = 0;
 815         fbcon_set_disp(info, &info->var, unit);
 816
 817         if (show_logo) {
 818                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 819                 struct fb_info *fg_info =
 820                         registered_fb[con2fb_map[fg_console]];
 821
 822                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 823                                    fg_vc->vc_rows, fg_vc->vc_cols,
 824                                    fg_vc->vc_rows);
 825         }
 826
 827         update_screen(vc_cons[fg_console].d);
 828 }
 829
 830 /**
 831  *      set_con2fb_map - map console to frame buffer device
 832  *      @unit: virtual console number to map
 833  *      @newidx: frame buffer index to map virtual console to
 834  *      @user: user request
 835  *
 836  *      Maps a virtual console @unit to a frame buffer device
 837  *      @newidx.
 838  *
 839  *      This should be called with the console lock held.
 840  */
 841 static int set_con2fb_map(int unit, int newidx, int user)
 842 {
 843         struct vc_data *vc = vc_cons[unit].d;
 844         int oldidx = con2fb_map[unit];
 845         struct fb_info *info = registered_fb[newidx];
 846         struct fb_info *oldinfo = NULL;
 847         int found, err = 0;
 848
 849         WARN_CONSOLE_UNLOCKED();
 850
 851         if (oldidx == newidx)
 852                 return 0;
 853
 854         if (!info)
 855                 return -EINVAL;
 856
 857         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 858                 info_idx = newidx;
 859                 return do_fbcon_takeover(0);
 860         }
 861
 862         if (oldidx != -1)
 863                 oldinfo = registered_fb[oldidx];
 864
 865         found = search_fb_in_map(newidx);
 866
 867         con2fb_map[unit] = newidx;
 868         if (!err && !found)
 869                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 870
 871
 872         /*
 873          * If old fb is not mapped to any of the consoles,
 874          * fbcon should release it.
 875          */
 876         if (!err && oldinfo && !search_fb_in_map(oldidx))
 877                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 878                                              found);
 879
 880         if (!err) {
 881                 int show_logo = (fg_console == 0 && !user &&
 882                                  logo_shown != FBCON_LOGO_DONTSHOW);
 883
 884                 if (!found)
 885                         fbcon_add_cursor_timer(info);
 886                 con2fb_map_boot[unit] = newidx;
 887                 con2fb_init_display(vc, info, unit, show_logo);
 888         }
 889
 890         if (!search_fb_in_map(info_idx))
 891                 info_idx = newidx;
 892
 893         return err;
 894 }
 895
 896 /*
 897  *  Low Level Operations
 898  */
 899 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 900 static int var_to_display(struct display *disp,
 901                           struct fb_var_screeninfo *var,
 902                           struct fb_info *info)
 903 {
 904         disp->xres_virtual = var->xres_virtual;
 905         disp->yres_virtual = var->yres_virtual;
 906         disp->bits_per_pixel = var->bits_per_pixel;
 907         disp->grayscale = var->grayscale;
 908         disp->nonstd = var->nonstd;
 909         disp->accel_flags = var->accel_flags;
 910         disp->height = var->height;
 911         disp->width = var->width;
 912         disp->red = var->red;
 913         disp->green = var->green;
 914         disp->blue = var->blue;
 915         disp->transp = var->transp;
 916         disp->rotate = var->rotate;
 917         disp->mode = fb_match_mode(var, &info->modelist);
 918         if (disp->mode == NULL)
 919                 /* This should not happen */
 920                 return -EINVAL;
 921         return 0;
 922 }
 923
 924 static void display_to_var(struct fb_var_screeninfo *var,
 925                            struct display *disp)
 926 {
 927         fb_videomode_to_var(var, disp->mode);
 928         var->xres_virtual = disp->xres_virtual;
 929         var->yres_virtual = disp->yres_virtual;
 930         var->bits_per_pixel = disp->bits_per_pixel;
 931         var->grayscale = disp->grayscale;
 932         var->nonstd = disp->nonstd;
 933         var->accel_flags = disp->accel_flags;
 934         var->height = disp->height;
 935         var->width = disp->width;
 936         var->red = disp->red;
 937         var->green = disp->green;
 938         var->blue = disp->blue;
 939         var->transp = disp->transp;
 940         var->rotate = disp->rotate;
 941 }
 942
 943 static const char *fbcon_startup(void)
 944 {
 945         const char *display_desc = "frame buffer device";
 946         struct display *p = &fb_display[fg_console];
 947         struct vc_data *vc = vc_cons[fg_console].d;
 948         const struct font_desc *font = NULL;
 949         struct module *owner;
 950         struct fb_info *info = NULL;
 951         struct fbcon_ops *ops;
 952         int rows, cols;
 953
 954         /*
 955          *  If num_registered_fb is zero, this is a call for the dummy part.
 956          *  The frame buffer devices weren't initialized yet.
 957          */
 958         if (!num_registered_fb || info_idx == -1)
 959                 return display_desc;
 960         /*
 961          * Instead of blindly using registered_fb[0], we use info_idx, set by
 962          * fb_console_init();
 963          */
 964         info = registered_fb[info_idx];
 965         if (!info)
 966                 return NULL;
 967
 968         owner = info->fbops->owner;
 969         if (!try_module_get(owner))
 970                 return NULL;
 971         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 972                 module_put(owner);
 973                 return NULL;
 974         }
 975
 976         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 977         if (!ops) {
 978                 module_put(owner);
 979                 return NULL;
 980         }
 981
 982         ops->currcon = -1;
 983         ops->graphics = 1;
 984         ops->cur_rotate = -1;
 985         ops->cur_blink_jiffies = HZ / 5;
 986         ops->info = info;
 987         info->fbcon_par = ops;
 988
 989         p->con_rotate = initial_rotation;
 990         if (p->con_rotate == -1)
 991                 p->con_rotate = info->fbcon_rotate_hint;
 992         if (p->con_rotate == -1)
 993                 p->con_rotate = FB_ROTATE_UR;
 994
 995         set_blitting_type(vc, info);
 996
 997         if (info->fix.type != FB_TYPE_TEXT) {
 998                 if (fbcon_softback_size) {
 999                         if (!softback_buf) {
1000                                 softback_buf =
1001                                     (unsigned long)
1002                                     kmalloc(fbcon_softback_size,
1003                                             GFP_KERNEL);
1004                                 if (!softback_buf) {
1005                                         fbcon_softback_size = 0;
1006                                         softback_top = 0;
1007                                 }
1008                         }
1009                 } else {
1010                         if (softback_buf) {
1011                                 kfree((void *) softback_buf);
1012                                 softback_buf = 0;
1013                                 softback_top = 0;
1014                         }
1015                 }
1016                 if (softback_buf)
1017                         softback_in = softback_top = softback_curr =
1018                             softback_buf;
1019                 softback_lines = 0;
1020         }
1021
1022         /* Setup default font */
1023         if (!p->fontdata && !vc->vc_font.data) {
1024                 if (!fontname[0] || !(font = find_font(fontname)))
1025                         font = get_default_font(info->var.xres,
1026                                                 info->var.yres,
1027                                                 info->pixmap.blit_x,
1028                                                 info->pixmap.blit_y);
1029                 vc->vc_font.width = font->width;
1030                 vc->vc_font.height = font->height;
1031                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1032                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1033         } else {
1034                 p->fontdata = vc->vc_font.data;
1035         }
1036
1037         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1038         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1039         cols /= vc->vc_font.width;
1040         rows /= vc->vc_font.height;
1041         vc_resize(vc, cols, rows);
1042
1043         DPRINTK("mode:   %s\n", info->fix.id);
1044         DPRINTK("visual: %d\n", info->fix.visual);
1045         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1046                 info->var.yres,
1047                 info->var.bits_per_pixel);
1048
1049         fbcon_add_cursor_timer(info);
1050         fbcon_has_exited = 0;
1051         return display_desc;
1052 }
1053
1054 static void fbcon_init(struct vc_data *vc, int init)
1055 {
1056         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1057         struct fbcon_ops *ops;
1058         struct vc_data **default_mode = vc->vc_display_fg;
1059         struct vc_data *svc = *default_mode;
1060         struct display *t, *p = &fb_display[vc->vc_num];
1061         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1062         int cap, ret;
1063
1064         if (info_idx == -1 || info == NULL)
1065             return;
1066
1067         cap = info->flags;
1068
1069         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1070             (info->fix.type == FB_TYPE_TEXT))
1071                 logo = 0;
1072
1073         if (var_to_display(p, &info->var, info))
1074                 return;
1075
1076         if (!info->fbcon_par)
1077                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1078
1079         /* If we are not the first console on this
1080            fb, copy the font from that console */
1081         t = &fb_display[fg_console];
1082         if (!p->fontdata) {
1083                 if (t->fontdata) {
1084                         struct vc_data *fvc = vc_cons[fg_console].d;
1085
1086                         vc->vc_font.data = (void *)(p->fontdata =
1087                                                     fvc->vc_font.data);
1088                         vc->vc_font.width = fvc->vc_font.width;
1089                         vc->vc_font.height = fvc->vc_font.height;
1090                         p->userfont = t->userfont;
1091
1092                         if (p->userfont)
1093                                 REFCOUNT(p->fontdata)++;
1094                 } else {
1095                         const struct font_desc *font = NULL;
1096
1097                         if (!fontname[0] || !(font = find_font(fontname)))
1098                                 font = get_default_font(info->var.xres,
1099                                                         info->var.yres,
1100                                                         info->pixmap.blit_x,
1101                                                         info->pixmap.blit_y);
1102                         vc->vc_font.width = font->width;
1103                         vc->vc_font.height = font->height;
1104                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1105                         vc->vc_font.charcount = 256; /* FIXME  Need to
1106                                                         support more fonts */
1107                 }
1108         }
1109
1110         if (p->userfont)
1111                 charcnt = FNTCHARCNT(p->fontdata);
1112
1113         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1114         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1115         if (charcnt == 256) {
1116                 vc->vc_hi_font_mask = 0;
1117         } else {
1118                 vc->vc_hi_font_mask = 0x100;
1119                 if (vc->vc_can_do_color)
1120                         vc->vc_complement_mask <<= 1;
1121         }
1122
1123         if (!*svc->vc_uni_pagedir_loc)
1124                 con_set_default_unimap(svc);
1125         if (!*vc->vc_uni_pagedir_loc)
1126                 con_copy_unimap(vc, svc);
1127
1128         ops = info->fbcon_par;
1129         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1130
1131         p->con_rotate = initial_rotation;
1132         if (p->con_rotate == -1)
1133                 p->con_rotate = info->fbcon_rotate_hint;
1134         if (p->con_rotate == -1)
1135                 p->con_rotate = FB_ROTATE_UR;
1136
1137         set_blitting_type(vc, info);
1138
1139         cols = vc->vc_cols;
1140         rows = vc->vc_rows;
1141         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1142         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1143         new_cols /= vc->vc_font.width;
1144         new_rows /= vc->vc_font.height;
1145
1146         /*
1147          * We must always set the mode. The mode of the previous console
1148          * driver could be in the same resolution but we are using different
1149          * hardware so we have to initialize the hardware.
1150          *
1151          * We need to do it in fbcon_init() to prevent screen corruption.
1152          */
1153         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1154                 if (info->fbops->fb_set_par &&
1155                     !(ops->flags & FBCON_FLAGS_INIT)) {
1156                         ret = info->fbops->fb_set_par(info);
1157
1158                         if (ret)
1159                                 printk(KERN_ERR "fbcon_init: detected "
1160                                         "unhandled fb_set_par error, "
1161                                         "error code %d\n", ret);
1162                 }
1163
1164                 ops->flags |= FBCON_FLAGS_INIT;
1165         }
1166
1167         ops->graphics = 0;
1168
1169         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1170             !(cap & FBINFO_HWACCEL_DISABLED))
1171                 p->scrollmode = SCROLL_MOVE;
1172         else /* default to something safe */
1173                 p->scrollmode = SCROLL_REDRAW;
1174
1175         /*
1176          *  ++guenther: console.c:vc_allocate() relies on initializing
1177          *  vc_{cols,rows}, but we must not set those if we are only
1178          *  resizing the console.
1179          */
1180         if (init) {
1181                 vc->vc_cols = new_cols;
1182                 vc->vc_rows = new_rows;
1183         } else
1184                 vc_resize(vc, new_cols, new_rows);
1185
1186         if (logo)
1187                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1188
1189         if (vc == svc && softback_buf)
1190                 fbcon_update_softback(vc);
1191
1192         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1193                 ops->rotate = FB_ROTATE_UR;
1194                 set_blitting_type(vc, info);
1195         }
1196
1197         ops->p = &fb_display[fg_console];
1198 }
1199
1200 static void fbcon_free_font(struct display *p, bool freefont)
1201 {
1202         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1203                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1204         p->fontdata = NULL;
1205         p->userfont = 0;
1206 }
1207
1208 static void set_vc_hi_font(struct vc_data *vc, bool set);
1209
1210 static void fbcon_deinit(struct vc_data *vc)
1211 {
1212         struct display *p = &fb_display[vc->vc_num];
1213         struct fb_info *info;
1214         struct fbcon_ops *ops;
1215         int idx;
1216         bool free_font = true;
1217
1218         idx = con2fb_map[vc->vc_num];
1219
1220         if (idx == -1)
1221                 goto finished;
1222
1223         info = registered_fb[idx];
1224
1225         if (!info)
1226                 goto finished;
1227
1228         if (info->flags & FBINFO_MISC_FIRMWARE)
1229                 free_font = false;
1230         ops = info->fbcon_par;
1231
1232         if (!ops)
1233                 goto finished;
1234
1235         if (con_is_visible(vc))
1236                 fbcon_del_cursor_timer(info);
1237
1238         ops->flags &= ~FBCON_FLAGS_INIT;
1239 finished:
1240
1241         fbcon_free_font(p, free_font);
1242         if (free_font)
1243                 vc->vc_font.data = NULL;
1244
1245         if (vc->vc_hi_font_mask)
1246                 set_vc_hi_font(vc, false);
1247
1248         if (!con_is_bound(&fb_con))
1249                 fbcon_exit();
1250
1251         return;
1252 }
1253
1254 /* ====================================================================== */
1255
1256 /*  fbcon_XXX routines - interface used by the world
1257  *
1258  *  This system is now divided into two levels because of complications
1259  *  caused by hardware scrolling. Top level functions:
1260  *
1261  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1262  *
1263  *  handles y values in range [0, scr_height-1] that correspond to real
1264  *  screen positions. y_wrap shift means that first line of bitmap may be
1265  *  anywhere on this display. These functions convert lineoffsets to
1266  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1267  *
1268  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1269  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1270  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1271  *
1272  *  WARNING:
1273  *
1274  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1275  *  Implies should only really hardware scroll in rows. Only reason for
1276  *  restriction is simplicity & efficiency at the moment.
1277  */
1278
1279 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1280                         int width)
1281 {
1282         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1283         struct fbcon_ops *ops = info->fbcon_par;
1284
1285         struct display *p = &fb_display[vc->vc_num];
1286         u_int y_break;
1287
1288         if (fbcon_is_inactive(vc, info))
1289                 return;
1290
1291         if (!height || !width)
1292                 return;
1293
1294         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1295                 vc->vc_top = 0;
1296                 /*
1297                  * If the font dimensions are not an integral of the display
1298                  * dimensions then the ops->clear below won't end up clearing
1299                  * the margins.  Call clear_margins here in case the logo
1300                  * bitmap stretched into the margin area.
1301                  */
1302                 fbcon_clear_margins(vc, 0);
1303         }
1304
1305         /* Split blits that cross physical y_wrap boundary */
1306
1307         y_break = p->vrows - p->yscroll;
1308         if (sy < y_break && sy + height - 1 >= y_break) {
1309                 u_int b = y_break - sy;
1310                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1311                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1312                                  width);
1313         } else
1314                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1315 }
1316
1317 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1318                         int count, int ypos, int xpos)
1319 {
1320         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1321         struct display *p = &fb_display[vc->vc_num];
1322         struct fbcon_ops *ops = info->fbcon_par;
1323
1324         if (!fbcon_is_inactive(vc, info))
1325                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1326                            get_color(vc, info, scr_readw(s), 1),
1327                            get_color(vc, info, scr_readw(s), 0));
1328 }
1329
1330 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1331 {
1332         unsigned short chr;
1333
1334         scr_writew(c, &chr);
1335         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1336 }
1337
1338 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1339 {
1340         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1341         struct fbcon_ops *ops = info->fbcon_par;
1342
1343         if (!fbcon_is_inactive(vc, info))
1344                 ops->clear_margins(vc, info, margin_color, bottom_only);
1345 }
1346
1347 static void fbcon_cursor(struct vc_data *vc, int mode)
1348 {
1349         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1350         struct fbcon_ops *ops = info->fbcon_par;
1351         int y;
1352         int c = scr_readw((u16 *) vc->vc_pos);
1353
1354         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1355
1356         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1357                 return;
1358
1359         if (vc->vc_cursor_type & 0x10)
1360                 fbcon_del_cursor_timer(info);
1361         else
1362                 fbcon_add_cursor_timer(info);
1363
1364         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1365         if (mode & CM_SOFTBACK) {
1366                 mode &= ~CM_SOFTBACK;
1367                 y = softback_lines;
1368         } else {
1369                 if (softback_lines)
1370                         fbcon_set_origin(vc);
1371                 y = 0;
1372         }
1373
1374         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1375                     get_color(vc, info, c, 0));
1376 }
1377
1378 static int scrollback_phys_max = 0;
1379 static int scrollback_max = 0;
1380 static int scrollback_current = 0;
1381
1382 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1383                            int unit)
1384 {
1385         struct display *p, *t;
1386         struct vc_data **default_mode, *vc;
1387         struct vc_data *svc;
1388         struct fbcon_ops *ops = info->fbcon_par;
1389         int rows, cols, charcnt = 256;
1390
1391         p = &fb_display[unit];
1392
1393         if (var_to_display(p, var, info))
1394                 return;
1395
1396         vc = vc_cons[unit].d;
1397
1398         if (!vc)
1399                 return;
1400
1401         default_mode = vc->vc_display_fg;
1402         svc = *default_mode;
1403         t = &fb_display[svc->vc_num];
1404
1405         if (!vc->vc_font.data) {
1406                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1407                 vc->vc_font.width = (*default_mode)->vc_font.width;
1408                 vc->vc_font.height = (*default_mode)->vc_font.height;
1409                 p->userfont = t->userfont;
1410                 if (p->userfont)
1411                         REFCOUNT(p->fontdata)++;
1412         }
1413         if (p->userfont)
1414                 charcnt = FNTCHARCNT(p->fontdata);
1415
1416         var->activate = FB_ACTIVATE_NOW;
1417         info->var.activate = var->activate;
1418         var->yoffset = info->var.yoffset;
1419         var->xoffset = info->var.xoffset;
1420         fb_set_var(info, var);
1421         ops->var = info->var;
1422         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1423         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1424         if (charcnt == 256) {
1425                 vc->vc_hi_font_mask = 0;
1426         } else {
1427                 vc->vc_hi_font_mask = 0x100;
1428                 if (vc->vc_can_do_color)
1429                         vc->vc_complement_mask <<= 1;
1430         }
1431
1432         if (!*svc->vc_uni_pagedir_loc)
1433                 con_set_default_unimap(svc);
1434         if (!*vc->vc_uni_pagedir_loc)
1435                 con_copy_unimap(vc, svc);
1436
1437         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1438         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1439         cols /= vc->vc_font.width;
1440         rows /= vc->vc_font.height;
1441         vc_resize(vc, cols, rows);
1442
1443         if (con_is_visible(vc)) {
1444                 update_screen(vc);
1445                 if (softback_buf)
1446                         fbcon_update_softback(vc);
1447         }
1448 }
1449
1450 static __inline__ void ywrap_up(struct vc_data *vc, 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         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1458                 p->yscroll -= p->vrows;
1459         ops->var.xoffset = 0;
1460         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1461         ops->var.vmode |= FB_VMODE_YWRAP;
1462         ops->update_start(info);
1463         scrollback_max += count;
1464         if (scrollback_max > scrollback_phys_max)
1465                 scrollback_max = scrollback_phys_max;
1466         scrollback_current = 0;
1467 }
1468
1469 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1470 {
1471         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1472         struct fbcon_ops *ops = info->fbcon_par;
1473         struct display *p = &fb_display[vc->vc_num];
1474
1475         p->yscroll -= count;
1476         if (p->yscroll < 0)     /* Deal with wrap */
1477                 p->yscroll += p->vrows;
1478         ops->var.xoffset = 0;
1479         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1480         ops->var.vmode |= FB_VMODE_YWRAP;
1481         ops->update_start(info);
1482         scrollback_max -= count;
1483         if (scrollback_max < 0)
1484                 scrollback_max = 0;
1485         scrollback_current = 0;
1486 }
1487
1488 static __inline__ void ypan_up(struct vc_data *vc, int count)
1489 {
1490         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1491         struct display *p = &fb_display[vc->vc_num];
1492         struct fbcon_ops *ops = info->fbcon_par;
1493
1494         p->yscroll += count;
1495         if (p->yscroll > p->vrows - vc->vc_rows) {
1496                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1497                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1498                 p->yscroll -= p->vrows - vc->vc_rows;
1499         }
1500
1501         ops->var.xoffset = 0;
1502         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1503         ops->var.vmode &= ~FB_VMODE_YWRAP;
1504         ops->update_start(info);
1505         fbcon_clear_margins(vc, 1);
1506         scrollback_max += count;
1507         if (scrollback_max > scrollback_phys_max)
1508                 scrollback_max = scrollback_phys_max;
1509         scrollback_current = 0;
1510 }
1511
1512 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1513 {
1514         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1515         struct fbcon_ops *ops = info->fbcon_par;
1516         struct display *p = &fb_display[vc->vc_num];
1517
1518         p->yscroll += count;
1519
1520         if (p->yscroll > p->vrows - vc->vc_rows) {
1521                 p->yscroll -= p->vrows - vc->vc_rows;
1522                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1523         }
1524
1525         ops->var.xoffset = 0;
1526         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1527         ops->var.vmode &= ~FB_VMODE_YWRAP;
1528         ops->update_start(info);
1529         fbcon_clear_margins(vc, 1);
1530         scrollback_max += count;
1531         if (scrollback_max > scrollback_phys_max)
1532                 scrollback_max = scrollback_phys_max;
1533         scrollback_current = 0;
1534 }
1535
1536 static __inline__ void ypan_down(struct vc_data *vc, int count)
1537 {
1538         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1539         struct display *p = &fb_display[vc->vc_num];
1540         struct fbcon_ops *ops = info->fbcon_par;
1541
1542         p->yscroll -= count;
1543         if (p->yscroll < 0) {
1544                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1545                             0, vc->vc_rows, vc->vc_cols);
1546                 p->yscroll += p->vrows - vc->vc_rows;
1547         }
1548
1549         ops->var.xoffset = 0;
1550         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1551         ops->var.vmode &= ~FB_VMODE_YWRAP;
1552         ops->update_start(info);
1553         fbcon_clear_margins(vc, 1);
1554         scrollback_max -= count;
1555         if (scrollback_max < 0)
1556                 scrollback_max = 0;
1557         scrollback_current = 0;
1558 }
1559
1560 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1561 {
1562         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1563         struct fbcon_ops *ops = info->fbcon_par;
1564         struct display *p = &fb_display[vc->vc_num];
1565
1566         p->yscroll -= count;
1567
1568         if (p->yscroll < 0) {
1569                 p->yscroll += p->vrows - vc->vc_rows;
1570                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1571         }
1572
1573         ops->var.xoffset = 0;
1574         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1575         ops->var.vmode &= ~FB_VMODE_YWRAP;
1576         ops->update_start(info);
1577         fbcon_clear_margins(vc, 1);
1578         scrollback_max -= count;
1579         if (scrollback_max < 0)
1580                 scrollback_max = 0;
1581         scrollback_current = 0;
1582 }
1583
1584 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1585                                   long delta)
1586 {
1587         int count = vc->vc_rows;
1588         unsigned short *d, *s;
1589         unsigned long n;
1590         int line = 0;
1591
1592         d = (u16 *) softback_curr;
1593         if (d == (u16 *) softback_in)
1594                 d = (u16 *) vc->vc_origin;
1595         n = softback_curr + delta * vc->vc_size_row;
1596         softback_lines -= delta;
1597         if (delta < 0) {
1598                 if (softback_curr < softback_top && n < softback_buf) {
1599                         n += softback_end - softback_buf;
1600                         if (n < softback_top) {
1601                                 softback_lines -=
1602                                     (softback_top - n) / vc->vc_size_row;
1603                                 n = softback_top;
1604                         }
1605                 } else if (softback_curr >= softback_top
1606                            && n < softback_top) {
1607                         softback_lines -=
1608                             (softback_top - n) / vc->vc_size_row;
1609                         n = softback_top;
1610                 }
1611         } else {
1612                 if (softback_curr > softback_in && n >= softback_end) {
1613                         n += softback_buf - softback_end;
1614                         if (n > softback_in) {
1615                                 n = softback_in;
1616                                 softback_lines = 0;
1617                         }
1618                 } else if (softback_curr <= softback_in && n > softback_in) {
1619                         n = softback_in;
1620                         softback_lines = 0;
1621                 }
1622         }
1623         if (n == softback_curr)
1624                 return;
1625         softback_curr = n;
1626         s = (u16 *) softback_curr;
1627         if (s == (u16 *) softback_in)
1628                 s = (u16 *) vc->vc_origin;
1629         while (count--) {
1630                 unsigned short *start;
1631                 unsigned short *le;
1632                 unsigned short c;
1633                 int x = 0;
1634                 unsigned short attr = 1;
1635
1636                 start = s;
1637                 le = advance_row(s, 1);
1638                 do {
1639                         c = scr_readw(s);
1640                         if (attr != (c & 0xff00)) {
1641                                 attr = c & 0xff00;
1642                                 if (s > start) {
1643                                         fbcon_putcs(vc, start, s - start,
1644                                                     line, x);
1645                                         x += s - start;
1646                                         start = s;
1647                                 }
1648                         }
1649                         if (c == scr_readw(d)) {
1650                                 if (s > start) {
1651                                         fbcon_putcs(vc, start, s - start,
1652                                                     line, x);
1653                                         x += s - start + 1;
1654                                         start = s + 1;
1655                                 } else {
1656                                         x++;
1657                                         start++;
1658                                 }
1659                         }
1660                         s++;
1661                         d++;
1662                 } while (s < le);
1663                 if (s > start)
1664                         fbcon_putcs(vc, start, s - start, line, x);
1665                 line++;
1666                 if (d == (u16 *) softback_end)
1667                         d = (u16 *) softback_buf;
1668                 if (d == (u16 *) softback_in)
1669                         d = (u16 *) vc->vc_origin;
1670                 if (s == (u16 *) softback_end)
1671                         s = (u16 *) softback_buf;
1672                 if (s == (u16 *) softback_in)
1673                         s = (u16 *) vc->vc_origin;
1674         }
1675 }
1676
1677 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1678                               int line, int count, int dy)
1679 {
1680         unsigned short *s = (unsigned short *)
1681                 (vc->vc_origin + vc->vc_size_row * line);
1682
1683         while (count--) {
1684                 unsigned short *start = s;
1685                 unsigned short *le = advance_row(s, 1);
1686                 unsigned short c;
1687                 int x = 0;
1688                 unsigned short attr = 1;
1689
1690                 do {
1691                         c = scr_readw(s);
1692                         if (attr != (c & 0xff00)) {
1693                                 attr = c & 0xff00;
1694                                 if (s > start) {
1695                                         fbcon_putcs(vc, start, s - start,
1696                                                     dy, x);
1697                                         x += s - start;
1698                                         start = s;
1699                                 }
1700                         }
1701                         console_conditional_schedule();
1702                         s++;
1703                 } while (s < le);
1704                 if (s > start)
1705                         fbcon_putcs(vc, start, s - start, dy, x);
1706                 console_conditional_schedule();
1707                 dy++;
1708         }
1709 }
1710
1711 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1712                         struct display *p, int line, int count, int ycount)
1713 {
1714         int offset = ycount * vc->vc_cols;
1715         unsigned short *d = (unsigned short *)
1716             (vc->vc_origin + vc->vc_size_row * line);
1717         unsigned short *s = d + offset;
1718         struct fbcon_ops *ops = info->fbcon_par;
1719
1720         while (count--) {
1721                 unsigned short *start = s;
1722                 unsigned short *le = advance_row(s, 1);
1723                 unsigned short c;
1724                 int x = 0;
1725
1726                 do {
1727                         c = scr_readw(s);
1728
1729                         if (c == scr_readw(d)) {
1730                                 if (s > start) {
1731                                         ops->bmove(vc, info, line + ycount, x,
1732                                                    line, x, 1, s-start);
1733                                         x += s - start + 1;
1734                                         start = s + 1;
1735                                 } else {
1736                                         x++;
1737                                         start++;
1738                                 }
1739                         }
1740
1741                         scr_writew(c, d);
1742                         console_conditional_schedule();
1743                         s++;
1744                         d++;
1745                 } while (s < le);
1746                 if (s > start)
1747                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1748                                    s-start);
1749                 console_conditional_schedule();
1750                 if (ycount > 0)
1751                         line++;
1752                 else {
1753                         line--;
1754                         /* NOTE: We subtract two lines from these pointers */
1755                         s -= vc->vc_size_row;
1756                         d -= vc->vc_size_row;
1757                 }
1758         }
1759 }
1760
1761 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1762                          int line, int count, int offset)
1763 {
1764         unsigned short *d = (unsigned short *)
1765             (vc->vc_origin + vc->vc_size_row * line);
1766         unsigned short *s = d + offset;
1767
1768         while (count--) {
1769                 unsigned short *start = s;
1770                 unsigned short *le = advance_row(s, 1);
1771                 unsigned short c;
1772                 int x = 0;
1773                 unsigned short attr = 1;
1774
1775                 do {
1776                         c = scr_readw(s);
1777                         if (attr != (c & 0xff00)) {
1778                                 attr = c & 0xff00;
1779                                 if (s > start) {
1780                                         fbcon_putcs(vc, start, s - start,
1781                                                     line, x);
1782                                         x += s - start;
1783                                         start = s;
1784                                 }
1785                         }
1786                         if (c == scr_readw(d)) {
1787                                 if (s > start) {
1788                                         fbcon_putcs(vc, start, s - start,
1789                                                      line, x);
1790                                         x += s - start + 1;
1791                                         start = s + 1;
1792                                 } else {
1793                                         x++;
1794                                         start++;
1795                                 }
1796                         }
1797                         scr_writew(c, d);
1798                         console_conditional_schedule();
1799                         s++;
1800                         d++;
1801                 } while (s < le);
1802                 if (s > start)
1803                         fbcon_putcs(vc, start, s - start, line, x);
1804                 console_conditional_schedule();
1805                 if (offset > 0)
1806                         line++;
1807                 else {
1808                         line--;
1809                         /* NOTE: We subtract two lines from these pointers */
1810                         s -= vc->vc_size_row;
1811                         d -= vc->vc_size_row;
1812                 }
1813         }
1814 }
1815
1816 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1817                                        int count)
1818 {
1819         unsigned short *p;
1820
1821         if (vc->vc_num != fg_console)
1822                 return;
1823         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1824
1825         while (count) {
1826                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1827                 count--;
1828                 p = advance_row(p, 1);
1829                 softback_in += vc->vc_size_row;
1830                 if (softback_in == softback_end)
1831                         softback_in = softback_buf;
1832                 if (softback_in == softback_top) {
1833                         softback_top += vc->vc_size_row;
1834                         if (softback_top == softback_end)
1835                                 softback_top = softback_buf;
1836                 }
1837         }
1838         softback_curr = softback_in;
1839 }
1840
1841 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1842                 enum con_scroll dir, unsigned int count)
1843 {
1844         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1845         struct display *p = &fb_display[vc->vc_num];
1846         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1847
1848         if (fbcon_is_inactive(vc, info))
1849                 return true;
1850
1851         fbcon_cursor(vc, CM_ERASE);
1852
1853         /*
1854          * ++Geert: Only use ywrap/ypan if the console is in text mode
1855          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1856          *           whole screen (prevents flicker).
1857          */
1858
1859         switch (dir) {
1860         case SM_UP:
1861                 if (count > vc->vc_rows)        /* Maximum realistic size */
1862                         count = vc->vc_rows;
1863                 if (softback_top)
1864                         fbcon_softback_note(vc, t, count);
1865                 if (logo_shown >= 0)
1866                         goto redraw_up;
1867                 switch (p->scrollmode) {
1868                 case SCROLL_MOVE:
1869                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1870                                      count);
1871                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1872                         scr_memsetw((unsigned short *) (vc->vc_origin +
1873                                                         vc->vc_size_row *
1874                                                         (b - count)),
1875                                     vc->vc_video_erase_char,
1876                                     vc->vc_size_row * count);
1877                         return true;
1878                         break;
1879
1880                 case SCROLL_WRAP_MOVE:
1881                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1882                                 if (t > 0)
1883                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1884                                                     vc->vc_cols);
1885                                 ywrap_up(vc, count);
1886                                 if (vc->vc_rows - b > 0)
1887                                         fbcon_bmove(vc, b - count, 0, b, 0,
1888                                                     vc->vc_rows - b,
1889                                                     vc->vc_cols);
1890                         } else if (info->flags & FBINFO_READS_FAST)
1891                                 fbcon_bmove(vc, t + count, 0, t, 0,
1892                                             b - t - count, vc->vc_cols);
1893                         else
1894                                 goto redraw_up;
1895                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1896                         break;
1897
1898                 case SCROLL_PAN_REDRAW:
1899                         if ((p->yscroll + count <=
1900                              2 * (p->vrows - vc->vc_rows))
1901                             && ((!scroll_partial && (b - t == vc->vc_rows))
1902                                 || (scroll_partial
1903                                     && (b - t - count >
1904                                         3 * vc->vc_rows >> 2)))) {
1905                                 if (t > 0)
1906                                         fbcon_redraw_move(vc, p, 0, t, count);
1907                                 ypan_up_redraw(vc, t, count);
1908                                 if (vc->vc_rows - b > 0)
1909                                         fbcon_redraw_move(vc, p, b,
1910                                                           vc->vc_rows - b, b);
1911                         } else
1912                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1913                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1914                         break;
1915
1916                 case SCROLL_PAN_MOVE:
1917                         if ((p->yscroll + count <=
1918                              2 * (p->vrows - vc->vc_rows))
1919                             && ((!scroll_partial && (b - t == vc->vc_rows))
1920                                 || (scroll_partial
1921                                     && (b - t - count >
1922                                         3 * vc->vc_rows >> 2)))) {
1923                                 if (t > 0)
1924                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1925                                                     vc->vc_cols);
1926                                 ypan_up(vc, count);
1927                                 if (vc->vc_rows - b > 0)
1928                                         fbcon_bmove(vc, b - count, 0, b, 0,
1929                                                     vc->vc_rows - b,
1930                                                     vc->vc_cols);
1931                         } else if (info->flags & FBINFO_READS_FAST)
1932                                 fbcon_bmove(vc, t + count, 0, t, 0,
1933                                             b - t - count, vc->vc_cols);
1934                         else
1935                                 goto redraw_up;
1936                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1937                         break;
1938
1939                 case SCROLL_REDRAW:
1940                       redraw_up:
1941                         fbcon_redraw(vc, p, t, b - t - count,
1942                                      count * vc->vc_cols);
1943                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1944                         scr_memsetw((unsigned short *) (vc->vc_origin +
1945                                                         vc->vc_size_row *
1946                                                         (b - count)),
1947                                     vc->vc_video_erase_char,
1948                                     vc->vc_size_row * count);
1949                         return true;
1950                 }
1951                 break;
1952
1953         case SM_DOWN:
1954                 if (count > vc->vc_rows)        /* Maximum realistic size */
1955                         count = vc->vc_rows;
1956                 if (logo_shown >= 0)
1957                         goto redraw_down;
1958                 switch (p->scrollmode) {
1959                 case SCROLL_MOVE:
1960                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1961                                      -count);
1962                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1963                         scr_memsetw((unsigned short *) (vc->vc_origin +
1964                                                         vc->vc_size_row *
1965                                                         t),
1966                                     vc->vc_video_erase_char,
1967                                     vc->vc_size_row * count);
1968                         return true;
1969                         break;
1970
1971                 case SCROLL_WRAP_MOVE:
1972                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1973                                 if (vc->vc_rows - b > 0)
1974                                         fbcon_bmove(vc, b, 0, b - count, 0,
1975                                                     vc->vc_rows - b,
1976                                                     vc->vc_cols);
1977                                 ywrap_down(vc, count);
1978                                 if (t > 0)
1979                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1980                                                     vc->vc_cols);
1981                         } else if (info->flags & FBINFO_READS_FAST)
1982                                 fbcon_bmove(vc, t, 0, t + count, 0,
1983                                             b - t - count, vc->vc_cols);
1984                         else
1985                                 goto redraw_down;
1986                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1987                         break;
1988
1989                 case SCROLL_PAN_MOVE:
1990                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1991                             && ((!scroll_partial && (b - t == vc->vc_rows))
1992                                 || (scroll_partial
1993                                     && (b - t - count >
1994                                         3 * vc->vc_rows >> 2)))) {
1995                                 if (vc->vc_rows - b > 0)
1996                                         fbcon_bmove(vc, b, 0, b - count, 0,
1997                                                     vc->vc_rows - b,
1998                                                     vc->vc_cols);
1999                                 ypan_down(vc, count);
2000                                 if (t > 0)
2001                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2002                                                     vc->vc_cols);
2003                         } else if (info->flags & FBINFO_READS_FAST)
2004                                 fbcon_bmove(vc, t, 0, t + count, 0,
2005                                             b - t - count, vc->vc_cols);
2006                         else
2007                                 goto redraw_down;
2008                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2009                         break;
2010
2011                 case SCROLL_PAN_REDRAW:
2012                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2013                             && ((!scroll_partial && (b - t == vc->vc_rows))
2014                                 || (scroll_partial
2015                                     && (b - t - count >
2016                                         3 * vc->vc_rows >> 2)))) {
2017                                 if (vc->vc_rows - b > 0)
2018                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2019                                                           b - count);
2020                                 ypan_down_redraw(vc, t, count);
2021                                 if (t > 0)
2022                                         fbcon_redraw_move(vc, p, count, t, 0);
2023                         } else
2024                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2025                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2026                         break;
2027
2028                 case SCROLL_REDRAW:
2029                       redraw_down:
2030                         fbcon_redraw(vc, p, b - 1, b - t - count,
2031                                      -count * vc->vc_cols);
2032                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2033                         scr_memsetw((unsigned short *) (vc->vc_origin +
2034                                                         vc->vc_size_row *
2035                                                         t),
2036                                     vc->vc_video_erase_char,
2037                                     vc->vc_size_row * count);
2038                         return true;
2039                 }
2040         }
2041         return false;
2042 }
2043
2044
2045 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2046                         int height, int width)
2047 {
2048         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2049         struct display *p = &fb_display[vc->vc_num];
2050
2051         if (fbcon_is_inactive(vc, info))
2052                 return;
2053
2054         if (!width || !height)
2055                 return;
2056
2057         /*  Split blits that cross physical y_wrap case.
2058          *  Pathological case involves 4 blits, better to use recursive
2059          *  code rather than unrolled case
2060          *
2061          *  Recursive invocations don't need to erase the cursor over and
2062          *  over again, so we use fbcon_bmove_rec()
2063          */
2064         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2065                         p->vrows - p->yscroll);
2066 }
2067
2068 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2069                             int dy, int dx, int height, int width, u_int y_break)
2070 {
2071         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2072         struct fbcon_ops *ops = info->fbcon_par;
2073         u_int b;
2074
2075         if (sy < y_break && sy + height > y_break) {
2076                 b = y_break - sy;
2077                 if (dy < sy) {  /* Avoid trashing self */
2078                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2079                                         y_break);
2080                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2081                                         height - b, width, y_break);
2082                 } else {
2083                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2084                                         height - b, width, y_break);
2085                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2086                                         y_break);
2087                 }
2088                 return;
2089         }
2090
2091         if (dy < y_break && dy + height > y_break) {
2092                 b = y_break - dy;
2093                 if (dy < sy) {  /* Avoid trashing self */
2094                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2095                                         y_break);
2096                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2097                                         height - b, width, y_break);
2098                 } else {
2099                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2100                                         height - b, width, y_break);
2101                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2102                                         y_break);
2103                 }
2104                 return;
2105         }
2106         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2107                    height, width);
2108 }
2109
2110 static void updatescrollmode(struct display *p,
2111                                         struct fb_info *info,
2112                                         struct vc_data *vc)
2113 {
2114         struct fbcon_ops *ops = info->fbcon_par;
2115         int fh = vc->vc_font.height;
2116         int cap = info->flags;
2117         u16 t = 0;
2118         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2119                                   info->fix.xpanstep);
2120         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2121         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2122         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2123                                    info->var.xres_virtual);
2124         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2125                 divides(ypan, vc->vc_font.height) && vyres > yres;
2126         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2127                 divides(ywrap, vc->vc_font.height) &&
2128                 divides(vc->vc_font.height, vyres) &&
2129                 divides(vc->vc_font.height, yres);
2130         int reading_fast = cap & FBINFO_READS_FAST;
2131         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2132                 !(cap & FBINFO_HWACCEL_DISABLED);
2133         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2134                 !(cap & FBINFO_HWACCEL_DISABLED);
2135
2136         p->vrows = vyres/fh;
2137         if (yres > (fh * (vc->vc_rows + 1)))
2138                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2139         if ((yres % fh) && (vyres % fh < yres % fh))
2140                 p->vrows--;
2141
2142         if (good_wrap || good_pan) {
2143                 if (reading_fast || fast_copyarea)
2144                         p->scrollmode = good_wrap ?
2145                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2146                 else
2147                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2148                                 SCROLL_PAN_REDRAW;
2149         } else {
2150                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2151                         p->scrollmode = SCROLL_MOVE;
2152                 else
2153                         p->scrollmode = SCROLL_REDRAW;
2154         }
2155 }
2156
2157 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2158                         unsigned int height, unsigned int user)
2159 {
2160         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2161         struct fbcon_ops *ops = info->fbcon_par;
2162         struct display *p = &fb_display[vc->vc_num];
2163         struct fb_var_screeninfo var = info->var;
2164         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2165
2166         virt_w = FBCON_SWAP(ops->rotate, width, height);
2167         virt_h = FBCON_SWAP(ops->rotate, height, width);
2168         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2169                                  vc->vc_font.height);
2170         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2171                                  vc->vc_font.width);
2172         var.xres = virt_w * virt_fw;
2173         var.yres = virt_h * virt_fh;
2174         x_diff = info->var.xres - var.xres;
2175         y_diff = info->var.yres - var.yres;
2176         if (x_diff < 0 || x_diff > virt_fw ||
2177             y_diff < 0 || y_diff > virt_fh) {
2178                 const struct fb_videomode *mode;
2179
2180                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2181                 mode = fb_find_best_mode(&var, &info->modelist);
2182                 if (mode == NULL)
2183                         return -EINVAL;
2184                 display_to_var(&var, p);
2185                 fb_videomode_to_var(&var, mode);
2186
2187                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2188                         return -EINVAL;
2189
2190                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2191                 if (con_is_visible(vc)) {
2192                         var.activate = FB_ACTIVATE_NOW |
2193                                 FB_ACTIVATE_FORCE;
2194                         fb_set_var(info, &var);
2195                 }
2196                 var_to_display(p, &info->var, info);
2197                 ops->var = info->var;
2198         }
2199         updatescrollmode(p, info, vc);
2200         return 0;
2201 }
2202
2203 static int fbcon_switch(struct vc_data *vc)
2204 {
2205         struct fb_info *info, *old_info = NULL;
2206         struct fbcon_ops *ops;
2207         struct display *p = &fb_display[vc->vc_num];
2208         struct fb_var_screeninfo var;
2209         int i, ret, prev_console, charcnt = 256;
2210
2211         info = registered_fb[con2fb_map[vc->vc_num]];
2212         ops = info->fbcon_par;
2213
2214         if (softback_top) {
2215                 if (softback_lines)
2216                         fbcon_set_origin(vc);
2217                 softback_top = softback_curr = softback_in = softback_buf;
2218                 softback_lines = 0;
2219                 fbcon_update_softback(vc);
2220         }
2221
2222         if (logo_shown >= 0) {
2223                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2224
2225                 if (conp2->vc_top == logo_lines
2226                     && conp2->vc_bottom == conp2->vc_rows)
2227                         conp2->vc_top = 0;
2228                 logo_shown = FBCON_LOGO_CANSHOW;
2229         }
2230
2231         prev_console = ops->currcon;
2232         if (prev_console != -1)
2233                 old_info = registered_fb[con2fb_map[prev_console]];
2234         /*
2235          * FIXME: If we have multiple fbdev's loaded, we need to
2236          * update all info->currcon.  Perhaps, we can place this
2237          * in a centralized structure, but this might break some
2238          * drivers.
2239          *
2240          * info->currcon = vc->vc_num;
2241          */
2242         for_each_registered_fb(i) {
2243                 if (registered_fb[i]->fbcon_par) {
2244                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2245
2246                         o->currcon = vc->vc_num;
2247                 }
2248         }
2249         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2250         display_to_var(&var, p);
2251         var.activate = FB_ACTIVATE_NOW;
2252
2253         /*
2254          * make sure we don't unnecessarily trip the memcmp()
2255          * in fb_set_var()
2256          */
2257         info->var.activate = var.activate;
2258         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2259         fb_set_var(info, &var);
2260         ops->var = info->var;
2261
2262         if (old_info != NULL && (old_info != info ||
2263                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2264                 if (info->fbops->fb_set_par) {
2265                         ret = info->fbops->fb_set_par(info);
2266
2267                         if (ret)
2268                                 printk(KERN_ERR "fbcon_switch: detected "
2269                                         "unhandled fb_set_par error, "
2270                                         "error code %d\n", ret);
2271                 }
2272
2273                 if (old_info != info)
2274                         fbcon_del_cursor_timer(old_info);
2275         }
2276
2277         if (fbcon_is_inactive(vc, info) ||
2278             ops->blank_state != FB_BLANK_UNBLANK)
2279                 fbcon_del_cursor_timer(info);
2280         else
2281                 fbcon_add_cursor_timer(info);
2282
2283         set_blitting_type(vc, info);
2284         ops->cursor_reset = 1;
2285
2286         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2287                 ops->rotate = FB_ROTATE_UR;
2288                 set_blitting_type(vc, info);
2289         }
2290
2291         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2292         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2293
2294         if (p->userfont)
2295                 charcnt = FNTCHARCNT(vc->vc_font.data);
2296
2297         if (charcnt > 256)
2298                 vc->vc_complement_mask <<= 1;
2299
2300         updatescrollmode(p, info, vc);
2301
2302         switch (p->scrollmode) {
2303         case SCROLL_WRAP_MOVE:
2304                 scrollback_phys_max = p->vrows - vc->vc_rows;
2305                 break;
2306         case SCROLL_PAN_MOVE:
2307         case SCROLL_PAN_REDRAW:
2308                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2309                 if (scrollback_phys_max < 0)
2310                         scrollback_phys_max = 0;
2311                 break;
2312         default:
2313                 scrollback_phys_max = 0;
2314                 break;
2315         }
2316
2317         scrollback_max = 0;
2318         scrollback_current = 0;
2319
2320         if (!fbcon_is_inactive(vc, info)) {
2321             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2322             ops->update_start(info);
2323         }
2324
2325         fbcon_set_palette(vc, color_table);
2326         fbcon_clear_margins(vc, 0);
2327
2328         if (logo_shown == FBCON_LOGO_DRAW) {
2329
2330                 logo_shown = fg_console;
2331                 /* This is protected above by initmem_freed */
2332                 fb_show_logo(info, ops->rotate);
2333                 update_region(vc,
2334                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2335                               vc->vc_size_row * (vc->vc_bottom -
2336                                                  vc->vc_top) / 2);
2337                 return 0;
2338         }
2339         return 1;
2340 }
2341
2342 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2343                                 int blank)
2344 {
2345         struct fb_event event;
2346
2347         if (blank) {
2348                 unsigned short charmask = vc->vc_hi_font_mask ?
2349                         0x1ff : 0xff;
2350                 unsigned short oldc;
2351
2352                 oldc = vc->vc_video_erase_char;
2353                 vc->vc_video_erase_char &= charmask;
2354                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2355                 vc->vc_video_erase_char = oldc;
2356         }
2357
2358
2359         if (!lock_fb_info(info))
2360                 return;
2361         event.info = info;
2362         event.data = &blank;
2363         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2364         unlock_fb_info(info);
2365 }
2366
2367 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2368 {
2369         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2370         struct fbcon_ops *ops = info->fbcon_par;
2371
2372         if (mode_switch) {
2373                 struct fb_var_screeninfo var = info->var;
2374
2375                 ops->graphics = 1;
2376
2377                 if (!blank) {
2378                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2379                         fb_set_var(info, &var);
2380                         ops->graphics = 0;
2381                         ops->var = info->var;
2382                 }
2383         }
2384
2385         if (!fbcon_is_inactive(vc, info)) {
2386                 if (ops->blank_state != blank) {
2387                         ops->blank_state = blank;
2388                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2389                         ops->cursor_flash = (!blank);
2390
2391                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2392                                 if (fb_blank(info, blank))
2393                                         fbcon_generic_blank(vc, info, blank);
2394                 }
2395
2396                 if (!blank)
2397                         update_screen(vc);
2398         }
2399
2400         if (mode_switch || fbcon_is_inactive(vc, info) ||
2401             ops->blank_state != FB_BLANK_UNBLANK)
2402                 fbcon_del_cursor_timer(info);
2403         else
2404                 fbcon_add_cursor_timer(info);
2405
2406         return 0;
2407 }
2408
2409 static int fbcon_debug_enter(struct vc_data *vc)
2410 {
2411         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2412         struct fbcon_ops *ops = info->fbcon_par;
2413
2414         ops->save_graphics = ops->graphics;
2415         ops->graphics = 0;
2416         if (info->fbops->fb_debug_enter)
2417                 info->fbops->fb_debug_enter(info);
2418         fbcon_set_palette(vc, color_table);
2419         return 0;
2420 }
2421
2422 static int fbcon_debug_leave(struct vc_data *vc)
2423 {
2424         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2425         struct fbcon_ops *ops = info->fbcon_par;
2426
2427         ops->graphics = ops->save_graphics;
2428         if (info->fbops->fb_debug_leave)
2429                 info->fbops->fb_debug_leave(info);
2430         return 0;
2431 }
2432
2433 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2434 {
2435         u8 *fontdata = vc->vc_font.data;
2436         u8 *data = font->data;
2437         int i, j;
2438
2439         font->width = vc->vc_font.width;
2440         font->height = vc->vc_font.height;
2441         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2442         if (!font->data)
2443                 return 0;
2444
2445         if (font->width <= 8) {
2446                 j = vc->vc_font.height;
2447                 for (i = 0; i < font->charcount; i++) {
2448                         memcpy(data, fontdata, j);
2449                         memset(data + j, 0, 32 - j);
2450                         data += 32;
2451                         fontdata += j;
2452                 }
2453         } else if (font->width <= 16) {
2454                 j = vc->vc_font.height * 2;
2455                 for (i = 0; i < font->charcount; i++) {
2456                         memcpy(data, fontdata, j);
2457                         memset(data + j, 0, 64 - j);
2458                         data += 64;
2459                         fontdata += j;
2460                 }
2461         } else if (font->width <= 24) {
2462                 for (i = 0; i < font->charcount; i++) {
2463                         for (j = 0; j < vc->vc_font.height; j++) {
2464                                 *data++ = fontdata[0];
2465                                 *data++ = fontdata[1];
2466                                 *data++ = fontdata[2];
2467                                 fontdata += sizeof(u32);
2468                         }
2469                         memset(data, 0, 3 * (32 - j));
2470                         data += 3 * (32 - j);
2471                 }
2472         } else {
2473                 j = vc->vc_font.height * 4;
2474                 for (i = 0; i < font->charcount; i++) {
2475                         memcpy(data, fontdata, j);
2476                         memset(data + j, 0, 128 - j);
2477                         data += 128;
2478                         fontdata += j;
2479                 }
2480         }
2481         return 0;
2482 }
2483
2484 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2485 static void set_vc_hi_font(struct vc_data *vc, bool set)
2486 {
2487         if (!set) {
2488                 vc->vc_hi_font_mask = 0;
2489                 if (vc->vc_can_do_color) {
2490                         vc->vc_complement_mask >>= 1;
2491                         vc->vc_s_complement_mask >>= 1;
2492                 }
2493
2494                 /* ++Edmund: reorder the attribute bits */
2495                 if (vc->vc_can_do_color) {
2496                         unsigned short *cp =
2497                             (unsigned short *) vc->vc_origin;
2498                         int count = vc->vc_screenbuf_size / 2;
2499                         unsigned short c;
2500                         for (; count > 0; count--, cp++) {
2501                                 c = scr_readw(cp);
2502                                 scr_writew(((c & 0xfe00) >> 1) |
2503                                            (c & 0xff), cp);
2504                         }
2505                         c = vc->vc_video_erase_char;
2506                         vc->vc_video_erase_char =
2507                             ((c & 0xfe00) >> 1) | (c & 0xff);
2508                         vc->vc_attr >>= 1;
2509                 }
2510         } else {
2511                 vc->vc_hi_font_mask = 0x100;
2512                 if (vc->vc_can_do_color) {
2513                         vc->vc_complement_mask <<= 1;
2514                         vc->vc_s_complement_mask <<= 1;
2515                 }
2516
2517                 /* ++Edmund: reorder the attribute bits */
2518                 {
2519                         unsigned short *cp =
2520                             (unsigned short *) vc->vc_origin;
2521                         int count = vc->vc_screenbuf_size / 2;
2522                         unsigned short c;
2523                         for (; count > 0; count--, cp++) {
2524                                 unsigned short newc;
2525                                 c = scr_readw(cp);
2526                                 if (vc->vc_can_do_color)
2527                                         newc =
2528                                             ((c & 0xff00) << 1) | (c &
2529                                                                    0xff);
2530                                 else
2531                                         newc = c & ~0x100;
2532                                 scr_writew(newc, cp);
2533                         }
2534                         c = vc->vc_video_erase_char;
2535                         if (vc->vc_can_do_color) {
2536                                 vc->vc_video_erase_char =
2537                                     ((c & 0xff00) << 1) | (c & 0xff);
2538                                 vc->vc_attr <<= 1;
2539                         } else
2540                                 vc->vc_video_erase_char = c & ~0x100;
2541                 }
2542         }
2543 }
2544
2545 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2546                              const u8 * data, int userfont)
2547 {
2548         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2549         struct fbcon_ops *ops = info->fbcon_par;
2550         struct display *p = &fb_display[vc->vc_num];
2551         int resize;
2552         int cnt;
2553         char *old_data = NULL;
2554
2555         if (con_is_visible(vc) && softback_lines)
2556                 fbcon_set_origin(vc);
2557
2558         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2559         if (p->userfont)
2560                 old_data = vc->vc_font.data;
2561         if (userfont)
2562                 cnt = FNTCHARCNT(data);
2563         else
2564                 cnt = 256;
2565         vc->vc_font.data = (void *)(p->fontdata = data);
2566         if ((p->userfont = userfont))
2567                 REFCOUNT(data)++;
2568         vc->vc_font.width = w;
2569         vc->vc_font.height = h;
2570         if (vc->vc_hi_font_mask && cnt == 256)
2571                 set_vc_hi_font(vc, false);
2572         else if (!vc->vc_hi_font_mask && cnt == 512)
2573                 set_vc_hi_font(vc, true);
2574
2575         if (resize) {
2576                 int cols, rows;
2577
2578                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2579                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2580                 cols /= w;
2581                 rows /= h;
2582                 vc_resize(vc, cols, rows);
2583                 if (con_is_visible(vc) && softback_buf)
2584                         fbcon_update_softback(vc);
2585         } else if (con_is_visible(vc)
2586                    && vc->vc_mode == KD_TEXT) {
2587                 fbcon_clear_margins(vc, 0);
2588                 update_screen(vc);
2589         }
2590
2591         if (old_data && (--REFCOUNT(old_data) == 0))
2592                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2593         return 0;
2594 }
2595
2596 static int fbcon_copy_font(struct vc_data *vc, int con)
2597 {
2598         struct display *od = &fb_display[con];
2599         struct console_font *f = &vc->vc_font;
2600
2601         if (od->fontdata == f->data)
2602                 return 0;       /* already the same font... */
2603         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2604 }
2605
2606 /*
2607  *  User asked to set font; we are guaranteed that
2608  *      a) width and height are in range 1..32
2609  *      b) charcount does not exceed 512
2610  *  but lets not assume that, since someone might someday want to use larger
2611  *  fonts. And charcount of 512 is small for unicode support.
2612  *
2613  *  However, user space gives the font in 32 rows , regardless of
2614  *  actual font height. So a new API is needed if support for larger fonts
2615  *  is ever implemented.
2616  */
2617
2618 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2619                           unsigned int flags)
2620 {
2621         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2622         unsigned charcount = font->charcount;
2623         int w = font->width;
2624         int h = font->height;
2625         int size;
2626         int i, csum;
2627         u8 *new_data, *data = font->data;
2628         int pitch = (font->width+7) >> 3;
2629
2630         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2631          * If not this check should be changed to charcount < 256 */
2632         if (charcount != 256 && charcount != 512)
2633                 return -EINVAL;
2634
2635         /* Make sure drawing engine can handle the font */
2636         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2637             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2638                 return -EINVAL;
2639
2640         /* Make sure driver can handle the font length */
2641         if (fbcon_invalid_charcount(info, charcount))
2642                 return -EINVAL;
2643
2644         size = h * pitch * charcount;
2645
2646         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2647
2648         if (!new_data)
2649                 return -ENOMEM;
2650
2651         new_data += FONT_EXTRA_WORDS * sizeof(int);
2652         FNTSIZE(new_data) = size;
2653         FNTCHARCNT(new_data) = charcount;
2654         REFCOUNT(new_data) = 0; /* usage counter */
2655         for (i=0; i< charcount; i++) {
2656                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2657         }
2658
2659         /* Since linux has a nice crc32 function use it for counting font
2660          * checksums. */
2661         csum = crc32(0, new_data, size);
2662
2663         FNTSUM(new_data) = csum;
2664         /* Check if the same font is on some other console already */
2665         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2666                 struct vc_data *tmp = vc_cons[i].d;
2667
2668                 if (fb_display[i].userfont &&
2669                     fb_display[i].fontdata &&
2670                     FNTSUM(fb_display[i].fontdata) == csum &&
2671                     FNTSIZE(fb_display[i].fontdata) == size &&
2672                     tmp->vc_font.width == w &&
2673                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2674                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2675                         new_data = (u8 *)fb_display[i].fontdata;
2676                         break;
2677                 }
2678         }
2679         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2680 }
2681
2682 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2683 {
2684         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2685         const struct font_desc *f;
2686
2687         if (!name)
2688                 f = get_default_font(info->var.xres, info->var.yres,
2689                                      info->pixmap.blit_x, info->pixmap.blit_y);
2690         else if (!(f = find_font(name)))
2691                 return -ENOENT;
2692
2693         font->width = f->width;
2694         font->height = f->height;
2695         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2696 }
2697
2698 static u16 palette_red[16];
2699 static u16 palette_green[16];
2700 static u16 palette_blue[16];
2701
2702 static struct fb_cmap palette_cmap = {
2703         0, 16, palette_red, palette_green, palette_blue, NULL
2704 };
2705
2706 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2707 {
2708         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2709         int i, j, k, depth;
2710         u8 val;
2711
2712         if (fbcon_is_inactive(vc, info))
2713                 return;
2714
2715         if (!con_is_visible(vc))
2716                 return;
2717
2718         depth = fb_get_color_depth(&info->var, &info->fix);
2719         if (depth > 3) {
2720                 for (i = j = 0; i < 16; i++) {
2721                         k = table[i];
2722                         val = vc->vc_palette[j++];
2723                         palette_red[k] = (val << 8) | val;
2724                         val = vc->vc_palette[j++];
2725                         palette_green[k] = (val << 8) | val;
2726                         val = vc->vc_palette[j++];
2727                         palette_blue[k] = (val << 8) | val;
2728                 }
2729                 palette_cmap.len = 16;
2730                 palette_cmap.start = 0;
2731         /*
2732          * If framebuffer is capable of less than 16 colors,
2733          * use default palette of fbcon.
2734          */
2735         } else
2736                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2737
2738         fb_set_cmap(&palette_cmap, info);
2739 }
2740
2741 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2742 {
2743         unsigned long p;
2744         int line;
2745
2746         if (vc->vc_num != fg_console || !softback_lines)
2747                 return (u16 *) (vc->vc_origin + offset);
2748         line = offset / vc->vc_size_row;
2749         if (line >= softback_lines)
2750                 return (u16 *) (vc->vc_origin + offset -
2751                                 softback_lines * vc->vc_size_row);
2752         p = softback_curr + offset;
2753         if (p >= softback_end)
2754                 p += softback_buf - softback_end;
2755         return (u16 *) p;
2756 }
2757
2758 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2759                                  int *px, int *py)
2760 {
2761         unsigned long ret;
2762         int x, y;
2763
2764         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2765                 unsigned long offset = (pos - vc->vc_origin) / 2;
2766
2767                 x = offset % vc->vc_cols;
2768                 y = offset / vc->vc_cols;
2769                 if (vc->vc_num == fg_console)
2770                         y += softback_lines;
2771                 ret = pos + (vc->vc_cols - x) * 2;
2772         } else if (vc->vc_num == fg_console && softback_lines) {
2773                 unsigned long offset = pos - softback_curr;
2774
2775                 if (pos < softback_curr)
2776                         offset += softback_end - softback_buf;
2777                 offset /= 2;
2778                 x = offset % vc->vc_cols;
2779                 y = offset / vc->vc_cols;
2780                 ret = pos + (vc->vc_cols - x) * 2;
2781                 if (ret == softback_end)
2782                         ret = softback_buf;
2783                 if (ret == softback_in)
2784                         ret = vc->vc_origin;
2785         } else {
2786                 /* Should not happen */
2787                 x = y = 0;
2788                 ret = vc->vc_origin;
2789         }
2790         if (px)
2791                 *px = x;
2792         if (py)
2793                 *py = y;
2794         return ret;
2795 }
2796
2797 /* As we might be inside of softback, we may work with non-contiguous buffer,
2798    that's why we have to use a separate routine. */
2799 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2800 {
2801         while (cnt--) {
2802                 u16 a = scr_readw(p);
2803                 if (!vc->vc_can_do_color)
2804                         a ^= 0x0800;
2805                 else if (vc->vc_hi_font_mask == 0x100)
2806                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2807                             (((a) & 0x0e00) << 4);
2808                 else
2809                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2810                             (((a) & 0x0700) << 4);
2811                 scr_writew(a, p++);
2812                 if (p == (u16 *) softback_end)
2813                         p = (u16 *) softback_buf;
2814                 if (p == (u16 *) softback_in)
2815                         p = (u16 *) vc->vc_origin;
2816         }
2817 }
2818
2819 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2820 {
2821         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2822         struct fbcon_ops *ops = info->fbcon_par;
2823         struct display *disp = &fb_display[fg_console];
2824         int offset, limit, scrollback_old;
2825
2826         if (softback_top) {
2827                 if (vc->vc_num != fg_console)
2828                         return;
2829                 if (vc->vc_mode != KD_TEXT || !lines)
2830                         return;
2831                 if (logo_shown >= 0) {
2832                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2833
2834                         if (conp2->vc_top == logo_lines
2835                             && conp2->vc_bottom == conp2->vc_rows)
2836                                 conp2->vc_top = 0;
2837                         if (logo_shown == vc->vc_num) {
2838                                 unsigned long p, q;
2839                                 int i;
2840
2841                                 p = softback_in;
2842                                 q = vc->vc_origin +
2843                                     logo_lines * vc->vc_size_row;
2844                                 for (i = 0; i < logo_lines; i++) {
2845                                         if (p == softback_top)
2846                                                 break;
2847                                         if (p == softback_buf)
2848                                                 p = softback_end;
2849                                         p -= vc->vc_size_row;
2850                                         q -= vc->vc_size_row;
2851                                         scr_memcpyw((u16 *) q, (u16 *) p,
2852                                                     vc->vc_size_row);
2853                                 }
2854                                 softback_in = softback_curr = p;
2855                                 update_region(vc, vc->vc_origin,
2856                                               logo_lines * vc->vc_cols);
2857                         }
2858                         logo_shown = FBCON_LOGO_CANSHOW;
2859                 }
2860                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2861                 fbcon_redraw_softback(vc, disp, lines);
2862                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2863                 return;
2864         }
2865
2866         if (!scrollback_phys_max)
2867                 return;
2868
2869         scrollback_old = scrollback_current;
2870         scrollback_current -= lines;
2871         if (scrollback_current < 0)
2872                 scrollback_current = 0;
2873         else if (scrollback_current > scrollback_max)
2874                 scrollback_current = scrollback_max;
2875         if (scrollback_current == scrollback_old)
2876                 return;
2877
2878         if (fbcon_is_inactive(vc, info))
2879                 return;
2880
2881         fbcon_cursor(vc, CM_ERASE);
2882
2883         offset = disp->yscroll - scrollback_current;
2884         limit = disp->vrows;
2885         switch (disp->scrollmode) {
2886         case SCROLL_WRAP_MOVE:
2887                 info->var.vmode |= FB_VMODE_YWRAP;
2888                 break;
2889         case SCROLL_PAN_MOVE:
2890         case SCROLL_PAN_REDRAW:
2891                 limit -= vc->vc_rows;
2892                 info->var.vmode &= ~FB_VMODE_YWRAP;
2893                 break;
2894         }
2895         if (offset < 0)
2896                 offset += limit;
2897         else if (offset >= limit)
2898                 offset -= limit;
2899
2900         ops->var.xoffset = 0;
2901         ops->var.yoffset = offset * vc->vc_font.height;
2902         ops->update_start(info);
2903
2904         if (!scrollback_current)
2905                 fbcon_cursor(vc, CM_DRAW);
2906 }
2907
2908 static int fbcon_set_origin(struct vc_data *vc)
2909 {
2910         if (softback_lines)
2911                 fbcon_scrolldelta(vc, softback_lines);
2912         return 0;
2913 }
2914
2915 static void fbcon_suspended(struct fb_info *info)
2916 {
2917         struct vc_data *vc = NULL;
2918         struct fbcon_ops *ops = info->fbcon_par;
2919
2920         if (!ops || ops->currcon < 0)
2921                 return;
2922         vc = vc_cons[ops->currcon].d;
2923
2924         /* Clear cursor, restore saved data */
2925         fbcon_cursor(vc, CM_ERASE);
2926 }
2927
2928 static void fbcon_resumed(struct fb_info *info)
2929 {
2930         struct vc_data *vc;
2931         struct fbcon_ops *ops = info->fbcon_par;
2932
2933         if (!ops || ops->currcon < 0)
2934                 return;
2935         vc = vc_cons[ops->currcon].d;
2936
2937         update_screen(vc);
2938 }
2939
2940 static void fbcon_modechanged(struct fb_info *info)
2941 {
2942         struct fbcon_ops *ops = info->fbcon_par;
2943         struct vc_data *vc;
2944         struct display *p;
2945         int rows, cols;
2946
2947         if (!ops || ops->currcon < 0)
2948                 return;
2949         vc = vc_cons[ops->currcon].d;
2950         if (vc->vc_mode != KD_TEXT ||
2951             registered_fb[con2fb_map[ops->currcon]] != info)
2952                 return;
2953
2954         p = &fb_display[vc->vc_num];
2955         set_blitting_type(vc, info);
2956
2957         if (con_is_visible(vc)) {
2958                 var_to_display(p, &info->var, info);
2959                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2960                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2961                 cols /= vc->vc_font.width;
2962                 rows /= vc->vc_font.height;
2963                 vc_resize(vc, cols, rows);
2964                 updatescrollmode(p, info, vc);
2965                 scrollback_max = 0;
2966                 scrollback_current = 0;
2967
2968                 if (!fbcon_is_inactive(vc, info)) {
2969                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2970                     ops->update_start(info);
2971                 }
2972
2973                 fbcon_set_palette(vc, color_table);
2974                 update_screen(vc);
2975                 if (softback_buf)
2976                         fbcon_update_softback(vc);
2977         }
2978 }
2979
2980 static void fbcon_set_all_vcs(struct fb_info *info)
2981 {
2982         struct fbcon_ops *ops = info->fbcon_par;
2983         struct vc_data *vc;
2984         struct display *p;
2985         int i, rows, cols, fg = -1;
2986
2987         if (!ops || ops->currcon < 0)
2988                 return;
2989
2990         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2991                 vc = vc_cons[i].d;
2992                 if (!vc || vc->vc_mode != KD_TEXT ||
2993                     registered_fb[con2fb_map[i]] != info)
2994                         continue;
2995
2996                 if (con_is_visible(vc)) {
2997                         fg = i;
2998                         continue;
2999                 }
3000
3001                 p = &fb_display[vc->vc_num];
3002                 set_blitting_type(vc, info);
3003                 var_to_display(p, &info->var, info);
3004                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
3005                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
3006                 cols /= vc->vc_font.width;
3007                 rows /= vc->vc_font.height;
3008                 vc_resize(vc, cols, rows);
3009         }
3010
3011         if (fg != -1)
3012                 fbcon_modechanged(info);
3013 }
3014
3015 static int fbcon_mode_deleted(struct fb_info *info,
3016                               struct fb_videomode *mode)
3017 {
3018         struct fb_info *fb_info;
3019         struct display *p;
3020         int i, j, found = 0;
3021
3022         /* before deletion, ensure that mode is not in use */
3023         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3024                 j = con2fb_map[i];
3025                 if (j == -1)
3026                         continue;
3027                 fb_info = registered_fb[j];
3028                 if (fb_info != info)
3029                         continue;
3030                 p = &fb_display[i];
3031                 if (!p || !p->mode)
3032                         continue;
3033                 if (fb_mode_is_equal(p->mode, mode)) {
3034                         found = 1;
3035                         break;
3036                 }
3037         }
3038         return found;
3039 }
3040
3041 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3042 static int fbcon_unbind(void)
3043 {
3044         int ret;
3045
3046         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3047                                 fbcon_is_default);
3048
3049         if (!ret)
3050                 fbcon_has_console_bind = 0;
3051
3052         return ret;
3053 }
3054 #else
3055 static inline int fbcon_unbind(void)
3056 {
3057         return -EINVAL;
3058 }
3059 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3060
3061 /* called with console_lock held */
3062 static int fbcon_fb_unbind(int idx)
3063 {
3064         int i, new_idx = -1, ret = 0;
3065
3066         WARN_CONSOLE_UNLOCKED();
3067
3068         if (!fbcon_has_console_bind)
3069                 return 0;
3070
3071         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3072                 if (con2fb_map[i] != idx &&
3073                     con2fb_map[i] != -1) {
3074                         new_idx = con2fb_map[i];
3075                         break;
3076                 }
3077         }
3078
3079         if (new_idx != -1) {
3080                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3081                         if (con2fb_map[i] == idx)
3082                                 set_con2fb_map(i, new_idx, 0);
3083                 }
3084         } else {
3085                 struct fb_info *info = registered_fb[idx];
3086
3087                 /* This is sort of like set_con2fb_map, except it maps
3088                  * the consoles to no device and then releases the
3089                  * oldinfo to free memory and cancel the cursor blink
3090                  * timer. I can imagine this just becoming part of
3091                  * set_con2fb_map where new_idx is -1
3092                  */
3093                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3094                         if (con2fb_map[i] == idx) {
3095                                 con2fb_map[i] = -1;
3096                                 if (!search_fb_in_map(idx)) {
3097                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3098                                                                      info, NULL, i,
3099                                                                      idx, 0);
3100                                         if (ret) {
3101                                                 con2fb_map[i] = idx;
3102                                                 return ret;
3103                                         }
3104                                 }
3105                         }
3106                 }
3107                 ret = fbcon_unbind();
3108         }
3109
3110         return ret;
3111 }
3112
3113 /* called with console_lock held */
3114 static int fbcon_fb_unregistered(struct fb_info *info)
3115 {
3116         int i, idx;
3117
3118         WARN_CONSOLE_UNLOCKED();
3119
3120         if (deferred_takeover)
3121                 return 0;
3122
3123         idx = info->node;
3124         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3125                 if (con2fb_map[i] == idx)
3126                         con2fb_map[i] = -1;
3127         }
3128
3129         if (idx == info_idx) {
3130                 info_idx = -1;
3131
3132                 for_each_registered_fb(i) {
3133                         info_idx = i;
3134                         break;
3135                 }
3136         }
3137
3138         if (info_idx != -1) {
3139                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3140                         if (con2fb_map[i] == -1)
3141                                 con2fb_map[i] = info_idx;
3142                 }
3143         }
3144
3145         if (primary_device == idx)
3146                 primary_device = -1;
3147
3148         if (!num_registered_fb)
3149                 do_unregister_con_driver(&fb_con);
3150
3151         return 0;
3152 }
3153
3154 /* called with console_lock held */
3155 static void fbcon_remap_all(int idx)
3156 {
3157         int i;
3158
3159         WARN_CONSOLE_UNLOCKED();
3160
3161         if (deferred_takeover) {
3162                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3163                         con2fb_map_boot[i] = idx;
3164                 fbcon_map_override();
3165                 return;
3166         }
3167
3168         for (i = first_fb_vc; i <= last_fb_vc; i++)
3169                 set_con2fb_map(i, idx, 0);
3170
3171         if (con_is_bound(&fb_con)) {
3172                 printk(KERN_INFO "fbcon: Remapping primary device, "
3173                        "fb%i, to tty %i-%i\n", idx,
3174                        first_fb_vc + 1, last_fb_vc + 1);
3175                 info_idx = idx;
3176         }
3177 }
3178
3179 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3180 static void fbcon_select_primary(struct fb_info *info)
3181 {
3182         if (!map_override && primary_device == -1 &&
3183             fb_is_primary_device(info)) {
3184                 int i;
3185
3186                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3187                        info->fix.id, info->node);
3188                 primary_device = info->node;
3189
3190                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3191                         con2fb_map_boot[i] = primary_device;
3192
3193                 if (con_is_bound(&fb_con)) {
3194                         printk(KERN_INFO "fbcon: Remapping primary device, "
3195                                "fb%i, to tty %i-%i\n", info->node,
3196                                first_fb_vc + 1, last_fb_vc + 1);
3197                         info_idx = primary_device;
3198                 }
3199         }
3200
3201 }
3202 #else
3203 static inline void fbcon_select_primary(struct fb_info *info)
3204 {
3205         return;
3206 }
3207 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3208
3209 /* called with console_lock held */
3210 static int fbcon_fb_registered(struct fb_info *info)
3211 {
3212         int ret = 0, i, idx;
3213
3214         WARN_CONSOLE_UNLOCKED();
3215
3216         idx = info->node;
3217         fbcon_select_primary(info);
3218
3219         if (deferred_takeover) {
3220                 pr_info("fbcon: Deferring console take-over\n");
3221                 return 0;
3222         }
3223
3224         if (info_idx == -1) {
3225                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3226                         if (con2fb_map_boot[i] == idx) {
3227                                 info_idx = idx;
3228                                 break;
3229                         }
3230                 }
3231
3232                 if (info_idx != -1)
3233                         ret = do_fbcon_takeover(1);
3234         } else {
3235                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3236                         if (con2fb_map_boot[i] == idx)
3237                                 set_con2fb_map(i, idx, 0);
3238                 }
3239         }
3240
3241         return ret;
3242 }
3243
3244 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3245 {
3246         struct fbcon_ops *ops = info->fbcon_par;
3247         struct vc_data *vc;
3248
3249         if (!ops || ops->currcon < 0)
3250                 return;
3251
3252         vc = vc_cons[ops->currcon].d;
3253         if (vc->vc_mode != KD_TEXT ||
3254                         registered_fb[con2fb_map[ops->currcon]] != info)
3255                 return;
3256
3257         if (con_is_visible(vc)) {
3258                 if (blank)
3259                         do_blank_screen(0);
3260                 else
3261                         do_unblank_screen(0);
3262         }
3263         ops->blank_state = blank;
3264 }
3265
3266 static void fbcon_new_modelist(struct fb_info *info)
3267 {
3268         int i;
3269         struct vc_data *vc;
3270         struct fb_var_screeninfo var;
3271         const struct fb_videomode *mode;
3272
3273         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3274                 if (registered_fb[con2fb_map[i]] != info)
3275                         continue;
3276                 if (!fb_display[i].mode)
3277                         continue;
3278                 vc = vc_cons[i].d;
3279                 display_to_var(&var, &fb_display[i]);
3280                 mode = fb_find_nearest_mode(fb_display[i].mode,
3281                                             &info->modelist);
3282                 fb_videomode_to_var(&var, mode);
3283                 fbcon_set_disp(info, &var, vc->vc_num);
3284         }
3285 }
3286
3287 static void fbcon_get_requirement(struct fb_info *info,
3288                                   struct fb_blit_caps *caps)
3289 {
3290         struct vc_data *vc;
3291         struct display *p;
3292
3293         if (caps->flags) {
3294                 int i, charcnt;
3295
3296                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3297                         vc = vc_cons[i].d;
3298                         if (vc && vc->vc_mode == KD_TEXT &&
3299                             info->node == con2fb_map[i]) {
3300                                 p = &fb_display[i];
3301                                 caps->x |= 1 << (vc->vc_font.width - 1);
3302                                 caps->y |= 1 << (vc->vc_font.height - 1);
3303                                 charcnt = (p->userfont) ?
3304                                         FNTCHARCNT(p->fontdata) : 256;
3305                                 if (caps->len < charcnt)
3306                                         caps->len = charcnt;
3307                         }
3308                 }
3309         } else {
3310                 vc = vc_cons[fg_console].d;
3311
3312                 if (vc && vc->vc_mode == KD_TEXT &&
3313                     info->node == con2fb_map[fg_console]) {
3314                         p = &fb_display[fg_console];
3315                         caps->x = 1 << (vc->vc_font.width - 1);
3316                         caps->y = 1 << (vc->vc_font.height - 1);
3317                         caps->len = (p->userfont) ?
3318                                 FNTCHARCNT(p->fontdata) : 256;
3319                 }
3320         }
3321 }
3322
3323 static int fbcon_event_notify(struct notifier_block *self,
3324                               unsigned long action, void *data)
3325 {
3326         struct fb_event *event = data;
3327         struct fb_info *info = event->info;
3328         struct fb_videomode *mode;
3329         struct fb_con2fbmap *con2fb;
3330         struct fb_blit_caps *caps;
3331         int idx, ret = 0;
3332
3333         /*
3334          * ignore all events except driver registration and deregistration
3335          * if fbcon is not active
3336          */
3337         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3338                                   action == FB_EVENT_FB_UNREGISTERED))
3339                 goto done;
3340
3341         switch(action) {
3342         case FB_EVENT_SUSPEND:
3343                 fbcon_suspended(info);
3344                 break;
3345         case FB_EVENT_RESUME:
3346                 fbcon_resumed(info);
3347                 break;
3348         case FB_EVENT_MODE_CHANGE:
3349                 fbcon_modechanged(info);
3350                 break;
3351         case FB_EVENT_MODE_CHANGE_ALL:
3352                 fbcon_set_all_vcs(info);
3353                 break;
3354         case FB_EVENT_MODE_DELETE:
3355                 mode = event->data;
3356                 ret = fbcon_mode_deleted(info, mode);
3357                 break;
3358         case FB_EVENT_FB_UNBIND:
3359                 idx = info->node;
3360                 ret = fbcon_fb_unbind(idx);
3361                 break;
3362         case FB_EVENT_FB_REGISTERED:
3363                 ret = fbcon_fb_registered(info);
3364                 break;
3365         case FB_EVENT_FB_UNREGISTERED:
3366                 ret = fbcon_fb_unregistered(info);
3367                 break;
3368         case FB_EVENT_SET_CONSOLE_MAP:
3369                 /* called with console lock held */
3370                 con2fb = event->data;
3371                 ret = set_con2fb_map(con2fb->console - 1,
3372                                      con2fb->framebuffer, 1);
3373                 break;
3374         case FB_EVENT_GET_CONSOLE_MAP:
3375                 con2fb = event->data;
3376                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3377                 break;
3378         case FB_EVENT_BLANK:
3379                 fbcon_fb_blanked(info, *(int *)event->data);
3380                 break;
3381         case FB_EVENT_NEW_MODELIST:
3382                 fbcon_new_modelist(info);
3383                 break;
3384         case FB_EVENT_GET_REQ:
3385                 caps = event->data;
3386                 fbcon_get_requirement(info, caps);
3387                 break;
3388         case FB_EVENT_REMAP_ALL_CONSOLE:
3389                 idx = info->node;
3390                 fbcon_remap_all(idx);
3391                 break;
3392         }
3393 done:
3394         return ret;
3395 }
3396
3397 /*
3398  *  The console `switch' structure for the frame buffer based console
3399  */
3400
3401 static const struct consw fb_con = {
3402         .owner                  = THIS_MODULE,
3403         .con_startup            = fbcon_startup,
3404         .con_init               = fbcon_init,
3405         .con_deinit             = fbcon_deinit,
3406         .con_clear              = fbcon_clear,
3407         .con_putc               = fbcon_putc,
3408         .con_putcs              = fbcon_putcs,
3409         .con_cursor             = fbcon_cursor,
3410         .con_scroll             = fbcon_scroll,
3411         .con_switch             = fbcon_switch,
3412         .con_blank              = fbcon_blank,
3413         .con_font_set           = fbcon_set_font,
3414         .con_font_get           = fbcon_get_font,
3415         .con_font_default       = fbcon_set_def_font,
3416         .con_font_copy          = fbcon_copy_font,
3417         .con_set_palette        = fbcon_set_palette,
3418         .con_scrolldelta        = fbcon_scrolldelta,
3419         .con_set_origin         = fbcon_set_origin,
3420         .con_invert_region      = fbcon_invert_region,
3421         .con_screen_pos         = fbcon_screen_pos,
3422         .con_getxy              = fbcon_getxy,
3423         .con_resize             = fbcon_resize,
3424         .con_debug_enter        = fbcon_debug_enter,
3425         .con_debug_leave        = fbcon_debug_leave,
3426 };
3427
3428 static struct notifier_block fbcon_event_notifier = {
3429         .notifier_call  = fbcon_event_notify,
3430 };
3431
3432 static ssize_t store_rotate(struct device *device,
3433                             struct device_attribute *attr, const char *buf,
3434                             size_t count)
3435 {
3436         struct fb_info *info;
3437         int rotate, idx;
3438         char **last = NULL;
3439
3440         if (fbcon_has_exited)
3441                 return count;
3442
3443         console_lock();
3444         idx = con2fb_map[fg_console];
3445
3446         if (idx == -1 || registered_fb[idx] == NULL)
3447                 goto err;
3448
3449         info = registered_fb[idx];
3450         rotate = simple_strtoul(buf, last, 0);
3451         fbcon_rotate(info, rotate);
3452 err:
3453         console_unlock();
3454         return count;
3455 }
3456
3457 static ssize_t store_rotate_all(struct device *device,
3458                                 struct device_attribute *attr,const char *buf,
3459                                 size_t count)
3460 {
3461         struct fb_info *info;
3462         int rotate, idx;
3463         char **last = NULL;
3464
3465         if (fbcon_has_exited)
3466                 return count;
3467
3468         console_lock();
3469         idx = con2fb_map[fg_console];
3470
3471         if (idx == -1 || registered_fb[idx] == NULL)
3472                 goto err;
3473
3474         info = registered_fb[idx];
3475         rotate = simple_strtoul(buf, last, 0);
3476         fbcon_rotate_all(info, rotate);
3477 err:
3478         console_unlock();
3479         return count;
3480 }
3481
3482 static ssize_t show_rotate(struct device *device,
3483                            struct device_attribute *attr,char *buf)
3484 {
3485         struct fb_info *info;
3486         int rotate = 0, idx;
3487
3488         if (fbcon_has_exited)
3489                 return 0;
3490
3491         console_lock();
3492         idx = con2fb_map[fg_console];
3493
3494         if (idx == -1 || registered_fb[idx] == NULL)
3495                 goto err;
3496
3497         info = registered_fb[idx];
3498         rotate = fbcon_get_rotate(info);
3499 err:
3500         console_unlock();
3501         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3502 }
3503
3504 static ssize_t show_cursor_blink(struct device *device,
3505                                  struct device_attribute *attr, char *buf)
3506 {
3507         struct fb_info *info;
3508         struct fbcon_ops *ops;
3509         int idx, blink = -1;
3510
3511         if (fbcon_has_exited)
3512                 return 0;
3513
3514         console_lock();
3515         idx = con2fb_map[fg_console];
3516
3517         if (idx == -1 || registered_fb[idx] == NULL)
3518                 goto err;
3519
3520         info = registered_fb[idx];
3521         ops = info->fbcon_par;
3522
3523         if (!ops)
3524                 goto err;
3525
3526         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3527 err:
3528         console_unlock();
3529         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3530 }
3531
3532 static ssize_t store_cursor_blink(struct device *device,
3533                                   struct device_attribute *attr,
3534                                   const char *buf, size_t count)
3535 {
3536         struct fb_info *info;
3537         int blink, idx;
3538         char **last = NULL;
3539
3540         if (fbcon_has_exited)
3541                 return count;
3542
3543         console_lock();
3544         idx = con2fb_map[fg_console];
3545
3546         if (idx == -1 || registered_fb[idx] == NULL)
3547                 goto err;
3548
3549         info = registered_fb[idx];
3550
3551         if (!info->fbcon_par)
3552                 goto err;
3553
3554         blink = simple_strtoul(buf, last, 0);
3555
3556         if (blink) {
3557                 fbcon_cursor_noblink = 0;
3558                 fbcon_add_cursor_timer(info);
3559         } else {
3560                 fbcon_cursor_noblink = 1;
3561                 fbcon_del_cursor_timer(info);
3562         }
3563
3564 err:
3565         console_unlock();
3566         return count;
3567 }
3568
3569 static struct device_attribute device_attrs[] = {
3570         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3571         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3572         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3573                store_cursor_blink),
3574 };
3575
3576 static int fbcon_init_device(void)
3577 {
3578         int i, error = 0;
3579
3580         fbcon_has_sysfs = 1;
3581
3582         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3583                 error = device_create_file(fbcon_device, &device_attrs[i]);
3584
3585                 if (error)
3586                         break;
3587         }
3588
3589         if (error) {
3590                 while (--i >= 0)
3591                         device_remove_file(fbcon_device, &device_attrs[i]);
3592
3593                 fbcon_has_sysfs = 0;
3594         }
3595
3596         return 0;
3597 }
3598
3599 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3600 static void fbcon_register_existing_fbs(struct work_struct *work)
3601 {
3602         int i;
3603
3604         console_lock();
3605
3606         for_each_registered_fb(i)
3607                 fbcon_fb_registered(registered_fb[i]);
3608
3609         console_unlock();
3610 }
3611
3612 static struct notifier_block fbcon_output_nb;
3613 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3614
3615 static int fbcon_output_notifier(struct notifier_block *nb,
3616                                  unsigned long action, void *data)
3617 {
3618         WARN_CONSOLE_UNLOCKED();
3619
3620         pr_info("fbcon: Taking over console\n");
3621
3622         dummycon_unregister_output_notifier(&fbcon_output_nb);
3623         deferred_takeover = false;
3624         logo_shown = FBCON_LOGO_DONTSHOW;
3625
3626         /* We may get called in atomic context */
3627         schedule_work(&fbcon_deferred_takeover_work);
3628
3629         return NOTIFY_OK;
3630 }
3631 #endif
3632
3633 static void fbcon_start(void)
3634 {
3635         WARN_CONSOLE_UNLOCKED();
3636
3637 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3638         if (conswitchp != &dummy_con)
3639                 deferred_takeover = false;
3640
3641         if (deferred_takeover) {
3642                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3643                 dummycon_register_output_notifier(&fbcon_output_nb);
3644                 return;
3645         }
3646 #endif
3647
3648         if (num_registered_fb) {
3649                 int i;
3650
3651                 for_each_registered_fb(i) {
3652                         info_idx = i;
3653                         break;
3654                 }
3655
3656                 do_fbcon_takeover(0);
3657         }
3658 }
3659
3660 static void fbcon_exit(void)
3661 {
3662         struct fb_info *info;
3663         int i, j, mapped;
3664
3665         if (fbcon_has_exited)
3666                 return;
3667
3668 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3669         if (deferred_takeover) {
3670                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3671                 deferred_takeover = false;
3672         }
3673 #endif
3674
3675         kfree((void *)softback_buf);
3676         softback_buf = 0UL;
3677
3678         for_each_registered_fb(i) {
3679                 int pending = 0;
3680
3681                 mapped = 0;
3682                 info = registered_fb[i];
3683
3684                 if (info->queue.func)
3685                         pending = cancel_work_sync(&info->queue);
3686                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3687                         "no"));
3688
3689                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3690                         if (con2fb_map[j] == i) {
3691                                 mapped = 1;
3692                                 break;
3693                         }
3694                 }
3695
3696                 if (mapped) {
3697                         if (info->fbops->fb_release)
3698                                 info->fbops->fb_release(info, 0);
3699                         module_put(info->fbops->owner);
3700
3701                         if (info->fbcon_par) {
3702                                 struct fbcon_ops *ops = info->fbcon_par;
3703
3704                                 fbcon_del_cursor_timer(info);
3705                                 kfree(ops->cursor_src);
3706                                 kfree(ops->cursor_state.mask);
3707                                 kfree(info->fbcon_par);
3708                                 info->fbcon_par = NULL;
3709                         }
3710
3711                         if (info->queue.func == fb_flashcursor)
3712                                 info->queue.func = NULL;
3713                 }
3714         }
3715
3716         fbcon_has_exited = 1;
3717 }
3718
3719 void __init fb_console_init(void)
3720 {
3721         int i;
3722
3723         console_lock();
3724         fb_register_client(&fbcon_event_notifier);
3725         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3726                                      "fbcon");
3727
3728         if (IS_ERR(fbcon_device)) {
3729                 printk(KERN_WARNING "Unable to create device "
3730                        "for fbcon; errno = %ld\n",
3731                        PTR_ERR(fbcon_device));
3732                 fbcon_device = NULL;
3733         } else
3734                 fbcon_init_device();
3735
3736         for (i = 0; i < MAX_NR_CONSOLES; i++)
3737                 con2fb_map[i] = -1;
3738
3739         fbcon_start();
3740         console_unlock();
3741 }
3742
3743 #ifdef MODULE
3744
3745 static void __exit fbcon_deinit_device(void)
3746 {
3747         int i;
3748
3749         if (fbcon_has_sysfs) {
3750                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3751                         device_remove_file(fbcon_device, &device_attrs[i]);
3752
3753                 fbcon_has_sysfs = 0;
3754         }
3755 }
3756
3757 void __exit fb_console_exit(void)
3758 {
3759         console_lock();
3760         fb_unregister_client(&fbcon_event_notifier);
3761         fbcon_deinit_device();
3762         device_destroy(fb_class, MKDEV(0, 0));
3763         fbcon_exit();
3764         do_unregister_con_driver(&fb_con);
3765         console_unlock();
3766 }
3767 #endif