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_shown == FBCON_LOGO_DONTSHOW)
 660                 return;
 661
 662         if (logo_lines > vc->vc_bottom) {
 663                 logo_shown = FBCON_LOGO_CANSHOW;
 664                 printk(KERN_INFO
 665                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 666         } else {
 667                 logo_shown = FBCON_LOGO_DRAW;
 668                 vc->vc_top = logo_lines;
 669         }
 670 }
 671 #endif /* MODULE */
 672
 673 #ifdef CONFIG_FB_TILEBLITTING
 674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 675 {
 676         struct fbcon_ops *ops = info->fbcon_par;
 677
 678         ops->p = &fb_display[vc->vc_num];
 679
 680         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 681                 fbcon_set_tileops(vc, info);
 682         else {
 683                 fbcon_set_rotation(info);
 684                 fbcon_set_bitops(ops);
 685         }
 686 }
 687
 688 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 689 {
 690         int err = 0;
 691
 692         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 693             info->tileops->fb_get_tilemax(info) < charcount)
 694                 err = 1;
 695
 696         return err;
 697 }
 698 #else
 699 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 700 {
 701         struct fbcon_ops *ops = info->fbcon_par;
 702
 703         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 704         ops->p = &fb_display[vc->vc_num];
 705         fbcon_set_rotation(info);
 706         fbcon_set_bitops(ops);
 707 }
 708
 709 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 710 {
 711         return 0;
 712 }
 713
 714 #endif /* CONFIG_MISC_TILEBLITTING */
 715
 716
 717 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 718                                   int unit, int oldidx)
 719 {
 720         struct fbcon_ops *ops = NULL;
 721         int err = 0;
 722
 723         if (!try_module_get(info->fbops->owner))
 724                 err = -ENODEV;
 725
 726         if (!err && info->fbops->fb_open &&
 727             info->fbops->fb_open(info, 0))
 728                 err = -ENODEV;
 729
 730         if (!err) {
 731                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 732                 if (!ops)
 733                         err = -ENOMEM;
 734         }
 735
 736         if (!err) {
 737                 ops->cur_blink_jiffies = HZ / 5;
 738                 ops->info = info;
 739                 info->fbcon_par = ops;
 740
 741                 if (vc)
 742                         set_blitting_type(vc, info);
 743         }
 744
 745         if (err) {
 746                 con2fb_map[unit] = oldidx;
 747                 module_put(info->fbops->owner);
 748         }
 749
 750         return err;
 751 }
 752
 753 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 754                                   struct fb_info *newinfo, int unit,
 755                                   int oldidx, int found)
 756 {
 757         struct fbcon_ops *ops = oldinfo->fbcon_par;
 758         int err = 0, ret;
 759
 760         if (oldinfo->fbops->fb_release &&
 761             oldinfo->fbops->fb_release(oldinfo, 0)) {
 762                 con2fb_map[unit] = oldidx;
 763                 if (!found && newinfo->fbops->fb_release)
 764                         newinfo->fbops->fb_release(newinfo, 0);
 765                 if (!found)
 766                         module_put(newinfo->fbops->owner);
 767                 err = -ENODEV;
 768         }
 769
 770         if (!err) {
 771                 fbcon_del_cursor_timer(oldinfo);
 772                 kfree(ops->cursor_state.mask);
 773                 kfree(ops->cursor_data);
 774                 kfree(ops->cursor_src);
 775                 kfree(ops->fontbuffer);
 776                 kfree(oldinfo->fbcon_par);
 777                 oldinfo->fbcon_par = NULL;
 778                 module_put(oldinfo->fbops->owner);
 779                 /*
 780                   If oldinfo and newinfo are driving the same hardware,
 781                   the fb_release() method of oldinfo may attempt to
 782                   restore the hardware state.  This will leave the
 783                   newinfo in an undefined state. Thus, a call to
 784                   fb_set_par() may be needed for the newinfo.
 785                 */
 786                 if (newinfo && newinfo->fbops->fb_set_par) {
 787                         ret = newinfo->fbops->fb_set_par(newinfo);
 788
 789                         if (ret)
 790                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 791                                         "detected unhandled fb_set_par error, "
 792                                         "error code %d\n", ret);
 793                 }
 794         }
 795
 796         return err;
 797 }
 798
 799 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 800                                 int unit, int show_logo)
 801 {
 802         struct fbcon_ops *ops = info->fbcon_par;
 803         int ret;
 804
 805         ops->currcon = fg_console;
 806
 807         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 808                 ret = info->fbops->fb_set_par(info);
 809
 810                 if (ret)
 811                         printk(KERN_ERR "con2fb_init_display: detected "
 812                                 "unhandled fb_set_par error, "
 813                                 "error code %d\n", ret);
 814         }
 815
 816         ops->flags |= FBCON_FLAGS_INIT;
 817         ops->graphics = 0;
 818         fbcon_set_disp(info, &info->var, unit);
 819
 820         if (show_logo) {
 821                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 822                 struct fb_info *fg_info =
 823                         registered_fb[con2fb_map[fg_console]];
 824
 825                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 826                                    fg_vc->vc_rows, fg_vc->vc_cols,
 827                                    fg_vc->vc_rows);
 828         }
 829
 830         update_screen(vc_cons[fg_console].d);
 831 }
 832
 833 /**
 834  *      set_con2fb_map - map console to frame buffer device
 835  *      @unit: virtual console number to map
 836  *      @newidx: frame buffer index to map virtual console to
 837  *      @user: user request
 838  *
 839  *      Maps a virtual console @unit to a frame buffer device
 840  *      @newidx.
 841  *
 842  *      This should be called with the console lock held.
 843  */
 844 static int set_con2fb_map(int unit, int newidx, int user)
 845 {
 846         struct vc_data *vc = vc_cons[unit].d;
 847         int oldidx = con2fb_map[unit];
 848         struct fb_info *info = registered_fb[newidx];
 849         struct fb_info *oldinfo = NULL;
 850         int found, err = 0;
 851
 852         WARN_CONSOLE_UNLOCKED();
 853
 854         if (oldidx == newidx)
 855                 return 0;
 856
 857         if (!info)
 858                 return -EINVAL;
 859
 860         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 861                 info_idx = newidx;
 862                 return do_fbcon_takeover(0);
 863         }
 864
 865         if (oldidx != -1)
 866                 oldinfo = registered_fb[oldidx];
 867
 868         found = search_fb_in_map(newidx);
 869
 870         con2fb_map[unit] = newidx;
 871         if (!err && !found)
 872                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 873
 874
 875         /*
 876          * If old fb is not mapped to any of the consoles,
 877          * fbcon should release it.
 878          */
 879         if (!err && oldinfo && !search_fb_in_map(oldidx))
 880                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 881                                              found);
 882
 883         if (!err) {
 884                 int show_logo = (fg_console == 0 && !user &&
 885                                  logo_shown != FBCON_LOGO_DONTSHOW);
 886
 887                 if (!found)
 888                         fbcon_add_cursor_timer(info);
 889                 con2fb_map_boot[unit] = newidx;
 890                 con2fb_init_display(vc, info, unit, show_logo);
 891         }
 892
 893         if (!search_fb_in_map(info_idx))
 894                 info_idx = newidx;
 895
 896         return err;
 897 }
 898
 899 /*
 900  *  Low Level Operations
 901  */
 902 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 903 static int var_to_display(struct display *disp,
 904                           struct fb_var_screeninfo *var,
 905                           struct fb_info *info)
 906 {
 907         disp->xres_virtual = var->xres_virtual;
 908         disp->yres_virtual = var->yres_virtual;
 909         disp->bits_per_pixel = var->bits_per_pixel;
 910         disp->grayscale = var->grayscale;
 911         disp->nonstd = var->nonstd;
 912         disp->accel_flags = var->accel_flags;
 913         disp->height = var->height;
 914         disp->width = var->width;
 915         disp->red = var->red;
 916         disp->green = var->green;
 917         disp->blue = var->blue;
 918         disp->transp = var->transp;
 919         disp->rotate = var->rotate;
 920         disp->mode = fb_match_mode(var, &info->modelist);
 921         if (disp->mode == NULL)
 922                 /* This should not happen */
 923                 return -EINVAL;
 924         return 0;
 925 }
 926
 927 static void display_to_var(struct fb_var_screeninfo *var,
 928                            struct display *disp)
 929 {
 930         fb_videomode_to_var(var, disp->mode);
 931         var->xres_virtual = disp->xres_virtual;
 932         var->yres_virtual = disp->yres_virtual;
 933         var->bits_per_pixel = disp->bits_per_pixel;
 934         var->grayscale = disp->grayscale;
 935         var->nonstd = disp->nonstd;
 936         var->accel_flags = disp->accel_flags;
 937         var->height = disp->height;
 938         var->width = disp->width;
 939         var->red = disp->red;
 940         var->green = disp->green;
 941         var->blue = disp->blue;
 942         var->transp = disp->transp;
 943         var->rotate = disp->rotate;
 944 }
 945
 946 static const char *fbcon_startup(void)
 947 {
 948         const char *display_desc = "frame buffer device";
 949         struct display *p = &fb_display[fg_console];
 950         struct vc_data *vc = vc_cons[fg_console].d;
 951         const struct font_desc *font = NULL;
 952         struct module *owner;
 953         struct fb_info *info = NULL;
 954         struct fbcon_ops *ops;
 955         int rows, cols;
 956
 957         /*
 958          *  If num_registered_fb is zero, this is a call for the dummy part.
 959          *  The frame buffer devices weren't initialized yet.
 960          */
 961         if (!num_registered_fb || info_idx == -1)
 962                 return display_desc;
 963         /*
 964          * Instead of blindly using registered_fb[0], we use info_idx, set by
 965          * fb_console_init();
 966          */
 967         info = registered_fb[info_idx];
 968         if (!info)
 969                 return NULL;
 970
 971         owner = info->fbops->owner;
 972         if (!try_module_get(owner))
 973                 return NULL;
 974         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 975                 module_put(owner);
 976                 return NULL;
 977         }
 978
 979         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 980         if (!ops) {
 981                 module_put(owner);
 982                 return NULL;
 983         }
 984
 985         ops->currcon = -1;
 986         ops->graphics = 1;
 987         ops->cur_rotate = -1;
 988         ops->cur_blink_jiffies = HZ / 5;
 989         ops->info = info;
 990         info->fbcon_par = ops;
 991
 992         p->con_rotate = initial_rotation;
 993         if (p->con_rotate == -1)
 994                 p->con_rotate = info->fbcon_rotate_hint;
 995         if (p->con_rotate == -1)
 996                 p->con_rotate = FB_ROTATE_UR;
 997
 998         set_blitting_type(vc, info);
 999
1000         if (info->fix.type != FB_TYPE_TEXT) {
1001                 if (fbcon_softback_size) {
1002                         if (!softback_buf) {
1003                                 softback_buf =
1004                                     (unsigned long)
1005                                     kvmalloc(fbcon_softback_size,
1006                                             GFP_KERNEL);
1007                                 if (!softback_buf) {
1008                                         fbcon_softback_size = 0;
1009                                         softback_top = 0;
1010                                 }
1011                         }
1012                 } else {
1013                         if (softback_buf) {
1014                                 kvfree((void *) softback_buf);
1015                                 softback_buf = 0;
1016                                 softback_top = 0;
1017                         }
1018                 }
1019                 if (softback_buf)
1020                         softback_in = softback_top = softback_curr =
1021                             softback_buf;
1022                 softback_lines = 0;
1023         }
1024
1025         /* Setup default font */
1026         if (!p->fontdata && !vc->vc_font.data) {
1027                 if (!fontname[0] || !(font = find_font(fontname)))
1028                         font = get_default_font(info->var.xres,
1029                                                 info->var.yres,
1030                                                 info->pixmap.blit_x,
1031                                                 info->pixmap.blit_y);
1032                 vc->vc_font.width = font->width;
1033                 vc->vc_font.height = font->height;
1034                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1035                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1036         } else {
1037                 p->fontdata = vc->vc_font.data;
1038         }
1039
1040         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1041         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1042         cols /= vc->vc_font.width;
1043         rows /= vc->vc_font.height;
1044         vc_resize(vc, cols, rows);
1045
1046         DPRINTK("mode:   %s\n", info->fix.id);
1047         DPRINTK("visual: %d\n", info->fix.visual);
1048         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1049                 info->var.yres,
1050                 info->var.bits_per_pixel);
1051
1052         fbcon_add_cursor_timer(info);
1053         fbcon_has_exited = 0;
1054         return display_desc;
1055 }
1056
1057 static void fbcon_init(struct vc_data *vc, int init)
1058 {
1059         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1060         struct fbcon_ops *ops;
1061         struct vc_data **default_mode = vc->vc_display_fg;
1062         struct vc_data *svc = *default_mode;
1063         struct display *t, *p = &fb_display[vc->vc_num];
1064         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1065         int cap, ret;
1066
1067         if (info_idx == -1 || info == NULL)
1068             return;
1069
1070         cap = info->flags;
1071
1072         if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1073                 logo_shown = FBCON_LOGO_DONTSHOW;
1074
1075         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1076             (info->fix.type == FB_TYPE_TEXT))
1077                 logo = 0;
1078
1079         if (var_to_display(p, &info->var, info))
1080                 return;
1081
1082         if (!info->fbcon_par)
1083                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1084
1085         /* If we are not the first console on this
1086            fb, copy the font from that console */
1087         t = &fb_display[fg_console];
1088         if (!p->fontdata) {
1089                 if (t->fontdata) {
1090                         struct vc_data *fvc = vc_cons[fg_console].d;
1091
1092                         vc->vc_font.data = (void *)(p->fontdata =
1093                                                     fvc->vc_font.data);
1094                         vc->vc_font.width = fvc->vc_font.width;
1095                         vc->vc_font.height = fvc->vc_font.height;
1096                         p->userfont = t->userfont;
1097
1098                         if (p->userfont)
1099                                 REFCOUNT(p->fontdata)++;
1100                 } else {
1101                         const struct font_desc *font = NULL;
1102
1103                         if (!fontname[0] || !(font = find_font(fontname)))
1104                                 font = get_default_font(info->var.xres,
1105                                                         info->var.yres,
1106                                                         info->pixmap.blit_x,
1107                                                         info->pixmap.blit_y);
1108                         vc->vc_font.width = font->width;
1109                         vc->vc_font.height = font->height;
1110                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1111                         vc->vc_font.charcount = 256; /* FIXME  Need to
1112                                                         support more fonts */
1113                 }
1114         }
1115
1116         if (p->userfont)
1117                 charcnt = FNTCHARCNT(p->fontdata);
1118
1119         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1120         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1121         if (charcnt == 256) {
1122                 vc->vc_hi_font_mask = 0;
1123         } else {
1124                 vc->vc_hi_font_mask = 0x100;
1125                 if (vc->vc_can_do_color)
1126                         vc->vc_complement_mask <<= 1;
1127         }
1128
1129         if (!*svc->vc_uni_pagedir_loc)
1130                 con_set_default_unimap(svc);
1131         if (!*vc->vc_uni_pagedir_loc)
1132                 con_copy_unimap(vc, svc);
1133
1134         ops = info->fbcon_par;
1135         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1136
1137         p->con_rotate = initial_rotation;
1138         if (p->con_rotate == -1)
1139                 p->con_rotate = info->fbcon_rotate_hint;
1140         if (p->con_rotate == -1)
1141                 p->con_rotate = FB_ROTATE_UR;
1142
1143         set_blitting_type(vc, info);
1144
1145         cols = vc->vc_cols;
1146         rows = vc->vc_rows;
1147         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1148         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1149         new_cols /= vc->vc_font.width;
1150         new_rows /= vc->vc_font.height;
1151
1152         /*
1153          * We must always set the mode. The mode of the previous console
1154          * driver could be in the same resolution but we are using different
1155          * hardware so we have to initialize the hardware.
1156          *
1157          * We need to do it in fbcon_init() to prevent screen corruption.
1158          */
1159         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1160                 if (info->fbops->fb_set_par &&
1161                     !(ops->flags & FBCON_FLAGS_INIT)) {
1162                         ret = info->fbops->fb_set_par(info);
1163
1164                         if (ret)
1165                                 printk(KERN_ERR "fbcon_init: detected "
1166                                         "unhandled fb_set_par error, "
1167                                         "error code %d\n", ret);
1168                 }
1169
1170                 ops->flags |= FBCON_FLAGS_INIT;
1171         }
1172
1173         ops->graphics = 0;
1174
1175         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1176             !(cap & FBINFO_HWACCEL_DISABLED))
1177                 p->scrollmode = SCROLL_MOVE;
1178         else /* default to something safe */
1179                 p->scrollmode = SCROLL_REDRAW;
1180
1181         /*
1182          *  ++guenther: console.c:vc_allocate() relies on initializing
1183          *  vc_{cols,rows}, but we must not set those if we are only
1184          *  resizing the console.
1185          */
1186         if (init) {
1187                 vc->vc_cols = new_cols;
1188                 vc->vc_rows = new_rows;
1189         } else
1190                 vc_resize(vc, new_cols, new_rows);
1191
1192         if (logo)
1193                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1194
1195         if (vc == svc && softback_buf)
1196                 fbcon_update_softback(vc);
1197
1198         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1199                 ops->rotate = FB_ROTATE_UR;
1200                 set_blitting_type(vc, info);
1201         }
1202
1203         ops->p = &fb_display[fg_console];
1204 }
1205
1206 static void fbcon_free_font(struct display *p, bool freefont)
1207 {
1208         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1209                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1210         p->fontdata = NULL;
1211         p->userfont = 0;
1212 }
1213
1214 static void set_vc_hi_font(struct vc_data *vc, bool set);
1215
1216 static void fbcon_deinit(struct vc_data *vc)
1217 {
1218         struct display *p = &fb_display[vc->vc_num];
1219         struct fb_info *info;
1220         struct fbcon_ops *ops;
1221         int idx;
1222         bool free_font = true;
1223
1224         idx = con2fb_map[vc->vc_num];
1225
1226         if (idx == -1)
1227                 goto finished;
1228
1229         info = registered_fb[idx];
1230
1231         if (!info)
1232                 goto finished;
1233
1234         if (info->flags & FBINFO_MISC_FIRMWARE)
1235                 free_font = false;
1236         ops = info->fbcon_par;
1237
1238         if (!ops)
1239                 goto finished;
1240
1241         if (con_is_visible(vc))
1242                 fbcon_del_cursor_timer(info);
1243
1244         ops->flags &= ~FBCON_FLAGS_INIT;
1245 finished:
1246
1247         fbcon_free_font(p, free_font);
1248         if (free_font)
1249                 vc->vc_font.data = NULL;
1250
1251         if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1252                 set_vc_hi_font(vc, false);
1253
1254         if (!con_is_bound(&fb_con))
1255                 fbcon_exit();
1256
1257         return;
1258 }
1259
1260 /* ====================================================================== */
1261
1262 /*  fbcon_XXX routines - interface used by the world
1263  *
1264  *  This system is now divided into two levels because of complications
1265  *  caused by hardware scrolling. Top level functions:
1266  *
1267  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1268  *
1269  *  handles y values in range [0, scr_height-1] that correspond to real
1270  *  screen positions. y_wrap shift means that first line of bitmap may be
1271  *  anywhere on this display. These functions convert lineoffsets to
1272  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1273  *
1274  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1275  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1276  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1277  *
1278  *  WARNING:
1279  *
1280  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1281  *  Implies should only really hardware scroll in rows. Only reason for
1282  *  restriction is simplicity & efficiency at the moment.
1283  */
1284
1285 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1286                         int width)
1287 {
1288         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1289         struct fbcon_ops *ops = info->fbcon_par;
1290
1291         struct display *p = &fb_display[vc->vc_num];
1292         u_int y_break;
1293
1294         if (fbcon_is_inactive(vc, info))
1295                 return;
1296
1297         if (!height || !width)
1298                 return;
1299
1300         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1301                 vc->vc_top = 0;
1302                 /*
1303                  * If the font dimensions are not an integral of the display
1304                  * dimensions then the ops->clear below won't end up clearing
1305                  * the margins.  Call clear_margins here in case the logo
1306                  * bitmap stretched into the margin area.
1307                  */
1308                 fbcon_clear_margins(vc, 0);
1309         }
1310
1311         /* Split blits that cross physical y_wrap boundary */
1312
1313         y_break = p->vrows - p->yscroll;
1314         if (sy < y_break && sy + height - 1 >= y_break) {
1315                 u_int b = y_break - sy;
1316                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1317                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1318                                  width);
1319         } else
1320                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1321 }
1322
1323 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1324                         int count, int ypos, int xpos)
1325 {
1326         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1327         struct display *p = &fb_display[vc->vc_num];
1328         struct fbcon_ops *ops = info->fbcon_par;
1329
1330         if (!fbcon_is_inactive(vc, info))
1331                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1332                            get_color(vc, info, scr_readw(s), 1),
1333                            get_color(vc, info, scr_readw(s), 0));
1334 }
1335
1336 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1337 {
1338         unsigned short chr;
1339
1340         scr_writew(c, &chr);
1341         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1342 }
1343
1344 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1345 {
1346         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1347         struct fbcon_ops *ops = info->fbcon_par;
1348
1349         if (!fbcon_is_inactive(vc, info))
1350                 ops->clear_margins(vc, info, margin_color, bottom_only);
1351 }
1352
1353 static void fbcon_cursor(struct vc_data *vc, int mode)
1354 {
1355         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1356         struct fbcon_ops *ops = info->fbcon_par;
1357         int y;
1358         int c = scr_readw((u16 *) vc->vc_pos);
1359
1360         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1361
1362         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1363                 return;
1364
1365         if (vc->vc_cursor_type & 0x10)
1366                 fbcon_del_cursor_timer(info);
1367         else
1368                 fbcon_add_cursor_timer(info);
1369
1370         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1371         if (mode & CM_SOFTBACK) {
1372                 mode &= ~CM_SOFTBACK;
1373                 y = softback_lines;
1374         } else {
1375                 if (softback_lines)
1376                         fbcon_set_origin(vc);
1377                 y = 0;
1378         }
1379
1380         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1381                     get_color(vc, info, c, 0));
1382 }
1383
1384 static int scrollback_phys_max = 0;
1385 static int scrollback_max = 0;
1386 static int scrollback_current = 0;
1387
1388 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1389                            int unit)
1390 {
1391         struct display *p, *t;
1392         struct vc_data **default_mode, *vc;
1393         struct vc_data *svc;
1394         struct fbcon_ops *ops = info->fbcon_par;
1395         int rows, cols, charcnt = 256;
1396
1397         p = &fb_display[unit];
1398
1399         if (var_to_display(p, var, info))
1400                 return;
1401
1402         vc = vc_cons[unit].d;
1403
1404         if (!vc)
1405                 return;
1406
1407         default_mode = vc->vc_display_fg;
1408         svc = *default_mode;
1409         t = &fb_display[svc->vc_num];
1410
1411         if (!vc->vc_font.data) {
1412                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1413                 vc->vc_font.width = (*default_mode)->vc_font.width;
1414                 vc->vc_font.height = (*default_mode)->vc_font.height;
1415                 p->userfont = t->userfont;
1416                 if (p->userfont)
1417                         REFCOUNT(p->fontdata)++;
1418         }
1419         if (p->userfont)
1420                 charcnt = FNTCHARCNT(p->fontdata);
1421
1422         var->activate = FB_ACTIVATE_NOW;
1423         info->var.activate = var->activate;
1424         var->yoffset = info->var.yoffset;
1425         var->xoffset = info->var.xoffset;
1426         fb_set_var(info, var);
1427         ops->var = info->var;
1428         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1429         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1430         if (charcnt == 256) {
1431                 vc->vc_hi_font_mask = 0;
1432         } else {
1433                 vc->vc_hi_font_mask = 0x100;
1434                 if (vc->vc_can_do_color)
1435                         vc->vc_complement_mask <<= 1;
1436         }
1437
1438         if (!*svc->vc_uni_pagedir_loc)
1439                 con_set_default_unimap(svc);
1440         if (!*vc->vc_uni_pagedir_loc)
1441                 con_copy_unimap(vc, svc);
1442
1443         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1444         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1445         cols /= vc->vc_font.width;
1446         rows /= vc->vc_font.height;
1447         vc_resize(vc, cols, rows);
1448
1449         if (con_is_visible(vc)) {
1450                 update_screen(vc);
1451                 if (softback_buf)
1452                         fbcon_update_softback(vc);
1453         }
1454 }
1455
1456 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1457 {
1458         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1459         struct fbcon_ops *ops = info->fbcon_par;
1460         struct display *p = &fb_display[vc->vc_num];
1461
1462         p->yscroll += count;
1463         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1464                 p->yscroll -= p->vrows;
1465         ops->var.xoffset = 0;
1466         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1467         ops->var.vmode |= FB_VMODE_YWRAP;
1468         ops->update_start(info);
1469         scrollback_max += count;
1470         if (scrollback_max > scrollback_phys_max)
1471                 scrollback_max = scrollback_phys_max;
1472         scrollback_current = 0;
1473 }
1474
1475 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1476 {
1477         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1478         struct fbcon_ops *ops = info->fbcon_par;
1479         struct display *p = &fb_display[vc->vc_num];
1480
1481         p->yscroll -= count;
1482         if (p->yscroll < 0)     /* Deal with wrap */
1483                 p->yscroll += p->vrows;
1484         ops->var.xoffset = 0;
1485         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1486         ops->var.vmode |= FB_VMODE_YWRAP;
1487         ops->update_start(info);
1488         scrollback_max -= count;
1489         if (scrollback_max < 0)
1490                 scrollback_max = 0;
1491         scrollback_current = 0;
1492 }
1493
1494 static __inline__ void ypan_up(struct vc_data *vc, int count)
1495 {
1496         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1497         struct display *p = &fb_display[vc->vc_num];
1498         struct fbcon_ops *ops = info->fbcon_par;
1499
1500         p->yscroll += count;
1501         if (p->yscroll > p->vrows - vc->vc_rows) {
1502                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1503                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1504                 p->yscroll -= p->vrows - vc->vc_rows;
1505         }
1506
1507         ops->var.xoffset = 0;
1508         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1509         ops->var.vmode &= ~FB_VMODE_YWRAP;
1510         ops->update_start(info);
1511         fbcon_clear_margins(vc, 1);
1512         scrollback_max += count;
1513         if (scrollback_max > scrollback_phys_max)
1514                 scrollback_max = scrollback_phys_max;
1515         scrollback_current = 0;
1516 }
1517
1518 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1519 {
1520         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1521         struct fbcon_ops *ops = info->fbcon_par;
1522         struct display *p = &fb_display[vc->vc_num];
1523
1524         p->yscroll += count;
1525
1526         if (p->yscroll > p->vrows - vc->vc_rows) {
1527                 p->yscroll -= p->vrows - vc->vc_rows;
1528                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1529         }
1530
1531         ops->var.xoffset = 0;
1532         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1533         ops->var.vmode &= ~FB_VMODE_YWRAP;
1534         ops->update_start(info);
1535         fbcon_clear_margins(vc, 1);
1536         scrollback_max += count;
1537         if (scrollback_max > scrollback_phys_max)
1538                 scrollback_max = scrollback_phys_max;
1539         scrollback_current = 0;
1540 }
1541
1542 static __inline__ void ypan_down(struct vc_data *vc, int count)
1543 {
1544         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1545         struct display *p = &fb_display[vc->vc_num];
1546         struct fbcon_ops *ops = info->fbcon_par;
1547
1548         p->yscroll -= count;
1549         if (p->yscroll < 0) {
1550                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1551                             0, vc->vc_rows, vc->vc_cols);
1552                 p->yscroll += p->vrows - vc->vc_rows;
1553         }
1554
1555         ops->var.xoffset = 0;
1556         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1557         ops->var.vmode &= ~FB_VMODE_YWRAP;
1558         ops->update_start(info);
1559         fbcon_clear_margins(vc, 1);
1560         scrollback_max -= count;
1561         if (scrollback_max < 0)
1562                 scrollback_max = 0;
1563         scrollback_current = 0;
1564 }
1565
1566 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1567 {
1568         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1569         struct fbcon_ops *ops = info->fbcon_par;
1570         struct display *p = &fb_display[vc->vc_num];
1571
1572         p->yscroll -= count;
1573
1574         if (p->yscroll < 0) {
1575                 p->yscroll += p->vrows - vc->vc_rows;
1576                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1577         }
1578
1579         ops->var.xoffset = 0;
1580         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1581         ops->var.vmode &= ~FB_VMODE_YWRAP;
1582         ops->update_start(info);
1583         fbcon_clear_margins(vc, 1);
1584         scrollback_max -= count;
1585         if (scrollback_max < 0)
1586                 scrollback_max = 0;
1587         scrollback_current = 0;
1588 }
1589
1590 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1591                                   long delta)
1592 {
1593         int count = vc->vc_rows;
1594         unsigned short *d, *s;
1595         unsigned long n;
1596         int line = 0;
1597
1598         d = (u16 *) softback_curr;
1599         if (d == (u16 *) softback_in)
1600                 d = (u16 *) vc->vc_origin;
1601         n = softback_curr + delta * vc->vc_size_row;
1602         softback_lines -= delta;
1603         if (delta < 0) {
1604                 if (softback_curr < softback_top && n < softback_buf) {
1605                         n += softback_end - softback_buf;
1606                         if (n < softback_top) {
1607                                 softback_lines -=
1608                                     (softback_top - n) / vc->vc_size_row;
1609                                 n = softback_top;
1610                         }
1611                 } else if (softback_curr >= softback_top
1612                            && n < softback_top) {
1613                         softback_lines -=
1614                             (softback_top - n) / vc->vc_size_row;
1615                         n = softback_top;
1616                 }
1617         } else {
1618                 if (softback_curr > softback_in && n >= softback_end) {
1619                         n += softback_buf - softback_end;
1620                         if (n > softback_in) {
1621                                 n = softback_in;
1622                                 softback_lines = 0;
1623                         }
1624                 } else if (softback_curr <= softback_in && n > softback_in) {
1625                         n = softback_in;
1626                         softback_lines = 0;
1627                 }
1628         }
1629         if (n == softback_curr)
1630                 return;
1631         softback_curr = n;
1632         s = (u16 *) softback_curr;
1633         if (s == (u16 *) softback_in)
1634                 s = (u16 *) vc->vc_origin;
1635         while (count--) {
1636                 unsigned short *start;
1637                 unsigned short *le;
1638                 unsigned short c;
1639                 int x = 0;
1640                 unsigned short attr = 1;
1641
1642                 start = s;
1643                 le = advance_row(s, 1);
1644                 do {
1645                         c = scr_readw(s);
1646                         if (attr != (c & 0xff00)) {
1647                                 attr = c & 0xff00;
1648                                 if (s > start) {
1649                                         fbcon_putcs(vc, start, s - start,
1650                                                     line, x);
1651                                         x += s - start;
1652                                         start = s;
1653                                 }
1654                         }
1655                         if (c == scr_readw(d)) {
1656                                 if (s > start) {
1657                                         fbcon_putcs(vc, start, s - start,
1658                                                     line, x);
1659                                         x += s - start + 1;
1660                                         start = s + 1;
1661                                 } else {
1662                                         x++;
1663                                         start++;
1664                                 }
1665                         }
1666                         s++;
1667                         d++;
1668                 } while (s < le);
1669                 if (s > start)
1670                         fbcon_putcs(vc, start, s - start, line, x);
1671                 line++;
1672                 if (d == (u16 *) softback_end)
1673                         d = (u16 *) softback_buf;
1674                 if (d == (u16 *) softback_in)
1675                         d = (u16 *) vc->vc_origin;
1676                 if (s == (u16 *) softback_end)
1677                         s = (u16 *) softback_buf;
1678                 if (s == (u16 *) softback_in)
1679                         s = (u16 *) vc->vc_origin;
1680         }
1681 }
1682
1683 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1684                               int line, int count, int dy)
1685 {
1686         unsigned short *s = (unsigned short *)
1687                 (vc->vc_origin + vc->vc_size_row * line);
1688
1689         while (count--) {
1690                 unsigned short *start = s;
1691                 unsigned short *le = advance_row(s, 1);
1692                 unsigned short c;
1693                 int x = 0;
1694                 unsigned short attr = 1;
1695
1696                 do {
1697                         c = scr_readw(s);
1698                         if (attr != (c & 0xff00)) {
1699                                 attr = c & 0xff00;
1700                                 if (s > start) {
1701                                         fbcon_putcs(vc, start, s - start,
1702                                                     dy, x);
1703                                         x += s - start;
1704                                         start = s;
1705                                 }
1706                         }
1707                         console_conditional_schedule();
1708                         s++;
1709                 } while (s < le);
1710                 if (s > start)
1711                         fbcon_putcs(vc, start, s - start, dy, x);
1712                 console_conditional_schedule();
1713                 dy++;
1714         }
1715 }
1716
1717 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1718                         struct display *p, int line, int count, int ycount)
1719 {
1720         int offset = ycount * vc->vc_cols;
1721         unsigned short *d = (unsigned short *)
1722             (vc->vc_origin + vc->vc_size_row * line);
1723         unsigned short *s = d + offset;
1724         struct fbcon_ops *ops = info->fbcon_par;
1725
1726         while (count--) {
1727                 unsigned short *start = s;
1728                 unsigned short *le = advance_row(s, 1);
1729                 unsigned short c;
1730                 int x = 0;
1731
1732                 do {
1733                         c = scr_readw(s);
1734
1735                         if (c == scr_readw(d)) {
1736                                 if (s > start) {
1737                                         ops->bmove(vc, info, line + ycount, x,
1738                                                    line, x, 1, s-start);
1739                                         x += s - start + 1;
1740                                         start = s + 1;
1741                                 } else {
1742                                         x++;
1743                                         start++;
1744                                 }
1745                         }
1746
1747                         scr_writew(c, d);
1748                         console_conditional_schedule();
1749                         s++;
1750                         d++;
1751                 } while (s < le);
1752                 if (s > start)
1753                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1754                                    s-start);
1755                 console_conditional_schedule();
1756                 if (ycount > 0)
1757                         line++;
1758                 else {
1759                         line--;
1760                         /* NOTE: We subtract two lines from these pointers */
1761                         s -= vc->vc_size_row;
1762                         d -= vc->vc_size_row;
1763                 }
1764         }
1765 }
1766
1767 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1768                          int line, int count, int offset)
1769 {
1770         unsigned short *d = (unsigned short *)
1771             (vc->vc_origin + vc->vc_size_row * line);
1772         unsigned short *s = d + offset;
1773
1774         while (count--) {
1775                 unsigned short *start = s;
1776                 unsigned short *le = advance_row(s, 1);
1777                 unsigned short c;
1778                 int x = 0;
1779                 unsigned short attr = 1;
1780
1781                 do {
1782                         c = scr_readw(s);
1783                         if (attr != (c & 0xff00)) {
1784                                 attr = c & 0xff00;
1785                                 if (s > start) {
1786                                         fbcon_putcs(vc, start, s - start,
1787                                                     line, x);
1788                                         x += s - start;
1789                                         start = s;
1790                                 }
1791                         }
1792                         if (c == scr_readw(d)) {
1793                                 if (s > start) {
1794                                         fbcon_putcs(vc, start, s - start,
1795                                                      line, x);
1796                                         x += s - start + 1;
1797                                         start = s + 1;
1798                                 } else {
1799                                         x++;
1800                                         start++;
1801                                 }
1802                         }
1803                         scr_writew(c, d);
1804                         console_conditional_schedule();
1805                         s++;
1806                         d++;
1807                 } while (s < le);
1808                 if (s > start)
1809                         fbcon_putcs(vc, start, s - start, line, x);
1810                 console_conditional_schedule();
1811                 if (offset > 0)
1812                         line++;
1813                 else {
1814                         line--;
1815                         /* NOTE: We subtract two lines from these pointers */
1816                         s -= vc->vc_size_row;
1817                         d -= vc->vc_size_row;
1818                 }
1819         }
1820 }
1821
1822 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1823                                        int count)
1824 {
1825         unsigned short *p;
1826
1827         if (vc->vc_num != fg_console)
1828                 return;
1829         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1830
1831         while (count) {
1832                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1833                 count--;
1834                 p = advance_row(p, 1);
1835                 softback_in += vc->vc_size_row;
1836                 if (softback_in == softback_end)
1837                         softback_in = softback_buf;
1838                 if (softback_in == softback_top) {
1839                         softback_top += vc->vc_size_row;
1840                         if (softback_top == softback_end)
1841                                 softback_top = softback_buf;
1842                 }
1843         }
1844         softback_curr = softback_in;
1845 }
1846
1847 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1848                 enum con_scroll dir, unsigned int count)
1849 {
1850         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1851         struct display *p = &fb_display[vc->vc_num];
1852         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1853
1854         if (fbcon_is_inactive(vc, info))
1855                 return true;
1856
1857         fbcon_cursor(vc, CM_ERASE);
1858
1859         /*
1860          * ++Geert: Only use ywrap/ypan if the console is in text mode
1861          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1862          *           whole screen (prevents flicker).
1863          */
1864
1865         switch (dir) {
1866         case SM_UP:
1867                 if (count > vc->vc_rows)        /* Maximum realistic size */
1868                         count = vc->vc_rows;
1869                 if (softback_top)
1870                         fbcon_softback_note(vc, t, count);
1871                 if (logo_shown >= 0)
1872                         goto redraw_up;
1873                 switch (p->scrollmode) {
1874                 case SCROLL_MOVE:
1875                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1876                                      count);
1877                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1878                         scr_memsetw((unsigned short *) (vc->vc_origin +
1879                                                         vc->vc_size_row *
1880                                                         (b - count)),
1881                                     vc->vc_video_erase_char,
1882                                     vc->vc_size_row * count);
1883                         return true;
1884                         break;
1885
1886                 case SCROLL_WRAP_MOVE:
1887                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1888                                 if (t > 0)
1889                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1890                                                     vc->vc_cols);
1891                                 ywrap_up(vc, count);
1892                                 if (vc->vc_rows - b > 0)
1893                                         fbcon_bmove(vc, b - count, 0, b, 0,
1894                                                     vc->vc_rows - b,
1895                                                     vc->vc_cols);
1896                         } else if (info->flags & FBINFO_READS_FAST)
1897                                 fbcon_bmove(vc, t + count, 0, t, 0,
1898                                             b - t - count, vc->vc_cols);
1899                         else
1900                                 goto redraw_up;
1901                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1902                         break;
1903
1904                 case SCROLL_PAN_REDRAW:
1905                         if ((p->yscroll + count <=
1906                              2 * (p->vrows - vc->vc_rows))
1907                             && ((!scroll_partial && (b - t == vc->vc_rows))
1908                                 || (scroll_partial
1909                                     && (b - t - count >
1910                                         3 * vc->vc_rows >> 2)))) {
1911                                 if (t > 0)
1912                                         fbcon_redraw_move(vc, p, 0, t, count);
1913                                 ypan_up_redraw(vc, t, count);
1914                                 if (vc->vc_rows - b > 0)
1915                                         fbcon_redraw_move(vc, p, b,
1916                                                           vc->vc_rows - b, b);
1917                         } else
1918                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1919                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1920                         break;
1921
1922                 case SCROLL_PAN_MOVE:
1923                         if ((p->yscroll + count <=
1924                              2 * (p->vrows - vc->vc_rows))
1925                             && ((!scroll_partial && (b - t == vc->vc_rows))
1926                                 || (scroll_partial
1927                                     && (b - t - count >
1928                                         3 * vc->vc_rows >> 2)))) {
1929                                 if (t > 0)
1930                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1931                                                     vc->vc_cols);
1932                                 ypan_up(vc, count);
1933                                 if (vc->vc_rows - b > 0)
1934                                         fbcon_bmove(vc, b - count, 0, b, 0,
1935                                                     vc->vc_rows - b,
1936                                                     vc->vc_cols);
1937                         } else if (info->flags & FBINFO_READS_FAST)
1938                                 fbcon_bmove(vc, t + count, 0, t, 0,
1939                                             b - t - count, vc->vc_cols);
1940                         else
1941                                 goto redraw_up;
1942                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1943                         break;
1944
1945                 case SCROLL_REDRAW:
1946                       redraw_up:
1947                         fbcon_redraw(vc, p, t, b - t - count,
1948                                      count * vc->vc_cols);
1949                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1950                         scr_memsetw((unsigned short *) (vc->vc_origin +
1951                                                         vc->vc_size_row *
1952                                                         (b - count)),
1953                                     vc->vc_video_erase_char,
1954                                     vc->vc_size_row * count);
1955                         return true;
1956                 }
1957                 break;
1958
1959         case SM_DOWN:
1960                 if (count > vc->vc_rows)        /* Maximum realistic size */
1961                         count = vc->vc_rows;
1962                 if (logo_shown >= 0)
1963                         goto redraw_down;
1964                 switch (p->scrollmode) {
1965                 case SCROLL_MOVE:
1966                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1967                                      -count);
1968                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1969                         scr_memsetw((unsigned short *) (vc->vc_origin +
1970                                                         vc->vc_size_row *
1971                                                         t),
1972                                     vc->vc_video_erase_char,
1973                                     vc->vc_size_row * count);
1974                         return true;
1975                         break;
1976
1977                 case SCROLL_WRAP_MOVE:
1978                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1979                                 if (vc->vc_rows - b > 0)
1980                                         fbcon_bmove(vc, b, 0, b - count, 0,
1981                                                     vc->vc_rows - b,
1982                                                     vc->vc_cols);
1983                                 ywrap_down(vc, count);
1984                                 if (t > 0)
1985                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1986                                                     vc->vc_cols);
1987                         } else if (info->flags & FBINFO_READS_FAST)
1988                                 fbcon_bmove(vc, t, 0, t + count, 0,
1989                                             b - t - count, vc->vc_cols);
1990                         else
1991                                 goto redraw_down;
1992                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1993                         break;
1994
1995                 case SCROLL_PAN_MOVE:
1996                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1997                             && ((!scroll_partial && (b - t == vc->vc_rows))
1998                                 || (scroll_partial
1999                                     && (b - t - count >
2000                                         3 * vc->vc_rows >> 2)))) {
2001                                 if (vc->vc_rows - b > 0)
2002                                         fbcon_bmove(vc, b, 0, b - count, 0,
2003                                                     vc->vc_rows - b,
2004                                                     vc->vc_cols);
2005                                 ypan_down(vc, count);
2006                                 if (t > 0)
2007                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2008                                                     vc->vc_cols);
2009                         } else if (info->flags & FBINFO_READS_FAST)
2010                                 fbcon_bmove(vc, t, 0, t + count, 0,
2011                                             b - t - count, vc->vc_cols);
2012                         else
2013                                 goto redraw_down;
2014                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2015                         break;
2016
2017                 case SCROLL_PAN_REDRAW:
2018                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2019                             && ((!scroll_partial && (b - t == vc->vc_rows))
2020                                 || (scroll_partial
2021                                     && (b - t - count >
2022                                         3 * vc->vc_rows >> 2)))) {
2023                                 if (vc->vc_rows - b > 0)
2024                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2025                                                           b - count);
2026                                 ypan_down_redraw(vc, t, count);
2027                                 if (t > 0)
2028                                         fbcon_redraw_move(vc, p, count, t, 0);
2029                         } else
2030                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2031                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2032                         break;
2033
2034                 case SCROLL_REDRAW:
2035                       redraw_down:
2036                         fbcon_redraw(vc, p, b - 1, b - t - count,
2037                                      -count * vc->vc_cols);
2038                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2039                         scr_memsetw((unsigned short *) (vc->vc_origin +
2040                                                         vc->vc_size_row *
2041                                                         t),
2042                                     vc->vc_video_erase_char,
2043                                     vc->vc_size_row * count);
2044                         return true;
2045                 }
2046         }
2047         return false;
2048 }
2049
2050
2051 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2052                         int height, int width)
2053 {
2054         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2055         struct display *p = &fb_display[vc->vc_num];
2056
2057         if (fbcon_is_inactive(vc, info))
2058                 return;
2059
2060         if (!width || !height)
2061                 return;
2062
2063         /*  Split blits that cross physical y_wrap case.
2064          *  Pathological case involves 4 blits, better to use recursive
2065          *  code rather than unrolled case
2066          *
2067          *  Recursive invocations don't need to erase the cursor over and
2068          *  over again, so we use fbcon_bmove_rec()
2069          */
2070         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2071                         p->vrows - p->yscroll);
2072 }
2073
2074 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2075                             int dy, int dx, int height, int width, u_int y_break)
2076 {
2077         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2078         struct fbcon_ops *ops = info->fbcon_par;
2079         u_int b;
2080
2081         if (sy < y_break && sy + height > y_break) {
2082                 b = y_break - sy;
2083                 if (dy < sy) {  /* Avoid trashing self */
2084                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2085                                         y_break);
2086                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2087                                         height - b, width, y_break);
2088                 } else {
2089                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2090                                         height - b, width, y_break);
2091                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2092                                         y_break);
2093                 }
2094                 return;
2095         }
2096
2097         if (dy < y_break && dy + height > y_break) {
2098                 b = y_break - dy;
2099                 if (dy < sy) {  /* Avoid trashing self */
2100                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2101                                         y_break);
2102                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2103                                         height - b, width, y_break);
2104                 } else {
2105                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2106                                         height - b, width, y_break);
2107                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2108                                         y_break);
2109                 }
2110                 return;
2111         }
2112         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2113                    height, width);
2114 }
2115
2116 static void updatescrollmode(struct display *p,
2117                                         struct fb_info *info,
2118                                         struct vc_data *vc)
2119 {
2120         struct fbcon_ops *ops = info->fbcon_par;
2121         int fh = vc->vc_font.height;
2122         int cap = info->flags;
2123         u16 t = 0;
2124         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2125                                   info->fix.xpanstep);
2126         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2127         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2128         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2129                                    info->var.xres_virtual);
2130         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2131                 divides(ypan, vc->vc_font.height) && vyres > yres;
2132         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2133                 divides(ywrap, vc->vc_font.height) &&
2134                 divides(vc->vc_font.height, vyres) &&
2135                 divides(vc->vc_font.height, yres);
2136         int reading_fast = cap & FBINFO_READS_FAST;
2137         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2138                 !(cap & FBINFO_HWACCEL_DISABLED);
2139         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2140                 !(cap & FBINFO_HWACCEL_DISABLED);
2141
2142         p->vrows = vyres/fh;
2143         if (yres > (fh * (vc->vc_rows + 1)))
2144                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2145         if ((yres % fh) && (vyres % fh < yres % fh))
2146                 p->vrows--;
2147
2148         if (good_wrap || good_pan) {
2149                 if (reading_fast || fast_copyarea)
2150                         p->scrollmode = good_wrap ?
2151                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2152                 else
2153                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2154                                 SCROLL_PAN_REDRAW;
2155         } else {
2156                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2157                         p->scrollmode = SCROLL_MOVE;
2158                 else
2159                         p->scrollmode = SCROLL_REDRAW;
2160         }
2161 }
2162
2163 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2164                         unsigned int height, unsigned int user)
2165 {
2166         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2167         struct fbcon_ops *ops = info->fbcon_par;
2168         struct display *p = &fb_display[vc->vc_num];
2169         struct fb_var_screeninfo var = info->var;
2170         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2171
2172         virt_w = FBCON_SWAP(ops->rotate, width, height);
2173         virt_h = FBCON_SWAP(ops->rotate, height, width);
2174         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2175                                  vc->vc_font.height);
2176         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2177                                  vc->vc_font.width);
2178         var.xres = virt_w * virt_fw;
2179         var.yres = virt_h * virt_fh;
2180         x_diff = info->var.xres - var.xres;
2181         y_diff = info->var.yres - var.yres;
2182         if (x_diff < 0 || x_diff > virt_fw ||
2183             y_diff < 0 || y_diff > virt_fh) {
2184                 const struct fb_videomode *mode;
2185
2186                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2187                 mode = fb_find_best_mode(&var, &info->modelist);
2188                 if (mode == NULL)
2189                         return -EINVAL;
2190                 display_to_var(&var, p);
2191                 fb_videomode_to_var(&var, mode);
2192
2193                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2194                         return -EINVAL;
2195
2196                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2197                 if (con_is_visible(vc)) {
2198                         var.activate = FB_ACTIVATE_NOW |
2199                                 FB_ACTIVATE_FORCE;
2200                         fb_set_var(info, &var);
2201                 }
2202                 var_to_display(p, &info->var, info);
2203                 ops->var = info->var;
2204         }
2205         updatescrollmode(p, info, vc);
2206         return 0;
2207 }
2208
2209 static int fbcon_switch(struct vc_data *vc)
2210 {
2211         struct fb_info *info, *old_info = NULL;
2212         struct fbcon_ops *ops;
2213         struct display *p = &fb_display[vc->vc_num];
2214         struct fb_var_screeninfo var;
2215         int i, ret, prev_console, charcnt = 256;
2216
2217         info = registered_fb[con2fb_map[vc->vc_num]];
2218         ops = info->fbcon_par;
2219
2220         if (softback_top) {
2221                 if (softback_lines)
2222                         fbcon_set_origin(vc);
2223                 softback_top = softback_curr = softback_in = softback_buf;
2224                 softback_lines = 0;
2225                 fbcon_update_softback(vc);
2226         }
2227
2228         if (logo_shown >= 0) {
2229                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2230
2231                 if (conp2->vc_top == logo_lines
2232                     && conp2->vc_bottom == conp2->vc_rows)
2233                         conp2->vc_top = 0;
2234                 logo_shown = FBCON_LOGO_CANSHOW;
2235         }
2236
2237         prev_console = ops->currcon;
2238         if (prev_console != -1)
2239                 old_info = registered_fb[con2fb_map[prev_console]];
2240         /*
2241          * FIXME: If we have multiple fbdev's loaded, we need to
2242          * update all info->currcon.  Perhaps, we can place this
2243          * in a centralized structure, but this might break some
2244          * drivers.
2245          *
2246          * info->currcon = vc->vc_num;
2247          */
2248         for_each_registered_fb(i) {
2249                 if (registered_fb[i]->fbcon_par) {
2250                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2251
2252                         o->currcon = vc->vc_num;
2253                 }
2254         }
2255         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2256         display_to_var(&var, p);
2257         var.activate = FB_ACTIVATE_NOW;
2258
2259         /*
2260          * make sure we don't unnecessarily trip the memcmp()
2261          * in fb_set_var()
2262          */
2263         info->var.activate = var.activate;
2264         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2265         fb_set_var(info, &var);
2266         ops->var = info->var;
2267
2268         if (old_info != NULL && (old_info != info ||
2269                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2270                 if (info->fbops->fb_set_par) {
2271                         ret = info->fbops->fb_set_par(info);
2272
2273                         if (ret)
2274                                 printk(KERN_ERR "fbcon_switch: detected "
2275                                         "unhandled fb_set_par error, "
2276                                         "error code %d\n", ret);
2277                 }
2278
2279                 if (old_info != info)
2280                         fbcon_del_cursor_timer(old_info);
2281         }
2282
2283         if (fbcon_is_inactive(vc, info) ||
2284             ops->blank_state != FB_BLANK_UNBLANK)
2285                 fbcon_del_cursor_timer(info);
2286         else
2287                 fbcon_add_cursor_timer(info);
2288
2289         set_blitting_type(vc, info);
2290         ops->cursor_reset = 1;
2291
2292         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2293                 ops->rotate = FB_ROTATE_UR;
2294                 set_blitting_type(vc, info);
2295         }
2296
2297         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2298         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2299
2300         if (p->userfont)
2301                 charcnt = FNTCHARCNT(vc->vc_font.data);
2302
2303         if (charcnt > 256)
2304                 vc->vc_complement_mask <<= 1;
2305
2306         updatescrollmode(p, info, vc);
2307
2308         switch (p->scrollmode) {
2309         case SCROLL_WRAP_MOVE:
2310                 scrollback_phys_max = p->vrows - vc->vc_rows;
2311                 break;
2312         case SCROLL_PAN_MOVE:
2313         case SCROLL_PAN_REDRAW:
2314                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2315                 if (scrollback_phys_max < 0)
2316                         scrollback_phys_max = 0;
2317                 break;
2318         default:
2319                 scrollback_phys_max = 0;
2320                 break;
2321         }
2322
2323         scrollback_max = 0;
2324         scrollback_current = 0;
2325
2326         if (!fbcon_is_inactive(vc, info)) {
2327             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2328             ops->update_start(info);
2329         }
2330
2331         fbcon_set_palette(vc, color_table);
2332         fbcon_clear_margins(vc, 0);
2333
2334         if (logo_shown == FBCON_LOGO_DRAW) {
2335
2336                 logo_shown = fg_console;
2337                 /* This is protected above by initmem_freed */
2338                 fb_show_logo(info, ops->rotate);
2339                 update_region(vc,
2340                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2341                               vc->vc_size_row * (vc->vc_bottom -
2342                                                  vc->vc_top) / 2);
2343                 return 0;
2344         }
2345         return 1;
2346 }
2347
2348 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2349                                 int blank)
2350 {
2351         struct fb_event event;
2352
2353         if (blank) {
2354                 unsigned short charmask = vc->vc_hi_font_mask ?
2355                         0x1ff : 0xff;
2356                 unsigned short oldc;
2357
2358                 oldc = vc->vc_video_erase_char;
2359                 vc->vc_video_erase_char &= charmask;
2360                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2361                 vc->vc_video_erase_char = oldc;
2362         }
2363
2364
2365         if (!lock_fb_info(info))
2366                 return;
2367         event.info = info;
2368         event.data = &blank;
2369         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2370         unlock_fb_info(info);
2371 }
2372
2373 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2374 {
2375         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2376         struct fbcon_ops *ops = info->fbcon_par;
2377
2378         if (mode_switch) {
2379                 struct fb_var_screeninfo var = info->var;
2380
2381                 ops->graphics = 1;
2382
2383                 if (!blank) {
2384                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2385                         fb_set_var(info, &var);
2386                         ops->graphics = 0;
2387                         ops->var = info->var;
2388                 }
2389         }
2390
2391         if (!fbcon_is_inactive(vc, info)) {
2392                 if (ops->blank_state != blank) {
2393                         ops->blank_state = blank;
2394                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2395                         ops->cursor_flash = (!blank);
2396
2397                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2398                                 if (fb_blank(info, blank))
2399                                         fbcon_generic_blank(vc, info, blank);
2400                 }
2401
2402                 if (!blank)
2403                         update_screen(vc);
2404         }
2405
2406         if (mode_switch || fbcon_is_inactive(vc, info) ||
2407             ops->blank_state != FB_BLANK_UNBLANK)
2408                 fbcon_del_cursor_timer(info);
2409         else
2410                 fbcon_add_cursor_timer(info);
2411
2412         return 0;
2413 }
2414
2415 static int fbcon_debug_enter(struct vc_data *vc)
2416 {
2417         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2418         struct fbcon_ops *ops = info->fbcon_par;
2419
2420         ops->save_graphics = ops->graphics;
2421         ops->graphics = 0;
2422         if (info->fbops->fb_debug_enter)
2423                 info->fbops->fb_debug_enter(info);
2424         fbcon_set_palette(vc, color_table);
2425         return 0;
2426 }
2427
2428 static int fbcon_debug_leave(struct vc_data *vc)
2429 {
2430         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2431         struct fbcon_ops *ops = info->fbcon_par;
2432
2433         ops->graphics = ops->save_graphics;
2434         if (info->fbops->fb_debug_leave)
2435                 info->fbops->fb_debug_leave(info);
2436         return 0;
2437 }
2438
2439 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2440 {
2441         u8 *fontdata = vc->vc_font.data;
2442         u8 *data = font->data;
2443         int i, j;
2444
2445         font->width = vc->vc_font.width;
2446         font->height = vc->vc_font.height;
2447         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2448         if (!font->data)
2449                 return 0;
2450
2451         if (font->width <= 8) {
2452                 j = vc->vc_font.height;
2453                 for (i = 0; i < font->charcount; i++) {
2454                         memcpy(data, fontdata, j);
2455                         memset(data + j, 0, 32 - j);
2456                         data += 32;
2457                         fontdata += j;
2458                 }
2459         } else if (font->width <= 16) {
2460                 j = vc->vc_font.height * 2;
2461                 for (i = 0; i < font->charcount; i++) {
2462                         memcpy(data, fontdata, j);
2463                         memset(data + j, 0, 64 - j);
2464                         data += 64;
2465                         fontdata += j;
2466                 }
2467         } else if (font->width <= 24) {
2468                 for (i = 0; i < font->charcount; i++) {
2469                         for (j = 0; j < vc->vc_font.height; j++) {
2470                                 *data++ = fontdata[0];
2471                                 *data++ = fontdata[1];
2472                                 *data++ = fontdata[2];
2473                                 fontdata += sizeof(u32);
2474                         }
2475                         memset(data, 0, 3 * (32 - j));
2476                         data += 3 * (32 - j);
2477                 }
2478         } else {
2479                 j = vc->vc_font.height * 4;
2480                 for (i = 0; i < font->charcount; i++) {
2481                         memcpy(data, fontdata, j);
2482                         memset(data + j, 0, 128 - j);
2483                         data += 128;
2484                         fontdata += j;
2485                 }
2486         }
2487         return 0;
2488 }
2489
2490 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2491 static void set_vc_hi_font(struct vc_data *vc, bool set)
2492 {
2493         if (!set) {
2494                 vc->vc_hi_font_mask = 0;
2495                 if (vc->vc_can_do_color) {
2496                         vc->vc_complement_mask >>= 1;
2497                         vc->vc_s_complement_mask >>= 1;
2498                 }
2499
2500                 /* ++Edmund: reorder the attribute bits */
2501                 if (vc->vc_can_do_color) {
2502                         unsigned short *cp =
2503                             (unsigned short *) vc->vc_origin;
2504                         int count = vc->vc_screenbuf_size / 2;
2505                         unsigned short c;
2506                         for (; count > 0; count--, cp++) {
2507                                 c = scr_readw(cp);
2508                                 scr_writew(((c & 0xfe00) >> 1) |
2509                                            (c & 0xff), cp);
2510                         }
2511                         c = vc->vc_video_erase_char;
2512                         vc->vc_video_erase_char =
2513                             ((c & 0xfe00) >> 1) | (c & 0xff);
2514                         vc->vc_attr >>= 1;
2515                 }
2516         } else {
2517                 vc->vc_hi_font_mask = 0x100;
2518                 if (vc->vc_can_do_color) {
2519                         vc->vc_complement_mask <<= 1;
2520                         vc->vc_s_complement_mask <<= 1;
2521                 }
2522
2523                 /* ++Edmund: reorder the attribute bits */
2524                 {
2525                         unsigned short *cp =
2526                             (unsigned short *) vc->vc_origin;
2527                         int count = vc->vc_screenbuf_size / 2;
2528                         unsigned short c;
2529                         for (; count > 0; count--, cp++) {
2530                                 unsigned short newc;
2531                                 c = scr_readw(cp);
2532                                 if (vc->vc_can_do_color)
2533                                         newc =
2534                                             ((c & 0xff00) << 1) | (c &
2535                                                                    0xff);
2536                                 else
2537                                         newc = c & ~0x100;
2538                                 scr_writew(newc, cp);
2539                         }
2540                         c = vc->vc_video_erase_char;
2541                         if (vc->vc_can_do_color) {
2542                                 vc->vc_video_erase_char =
2543                                     ((c & 0xff00) << 1) | (c & 0xff);
2544                                 vc->vc_attr <<= 1;
2545                         } else
2546                                 vc->vc_video_erase_char = c & ~0x100;
2547                 }
2548         }
2549 }
2550
2551 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2552                              const u8 * data, int userfont)
2553 {
2554         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2555         struct fbcon_ops *ops = info->fbcon_par;
2556         struct display *p = &fb_display[vc->vc_num];
2557         int resize;
2558         int cnt;
2559         char *old_data = NULL;
2560
2561         if (con_is_visible(vc) && softback_lines)
2562                 fbcon_set_origin(vc);
2563
2564         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2565         if (p->userfont)
2566                 old_data = vc->vc_font.data;
2567         if (userfont)
2568                 cnt = FNTCHARCNT(data);
2569         else
2570                 cnt = 256;
2571         vc->vc_font.data = (void *)(p->fontdata = data);
2572         if ((p->userfont = userfont))
2573                 REFCOUNT(data)++;
2574         vc->vc_font.width = w;
2575         vc->vc_font.height = h;
2576         if (vc->vc_hi_font_mask && cnt == 256)
2577                 set_vc_hi_font(vc, false);
2578         else if (!vc->vc_hi_font_mask && cnt == 512)
2579                 set_vc_hi_font(vc, true);
2580
2581         if (resize) {
2582                 int cols, rows;
2583
2584                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2585                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2586                 cols /= w;
2587                 rows /= h;
2588                 vc_resize(vc, cols, rows);
2589                 if (con_is_visible(vc) && softback_buf)
2590                         fbcon_update_softback(vc);
2591         } else if (con_is_visible(vc)
2592                    && vc->vc_mode == KD_TEXT) {
2593                 fbcon_clear_margins(vc, 0);
2594                 update_screen(vc);
2595         }
2596
2597         if (old_data && (--REFCOUNT(old_data) == 0))
2598                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2599         return 0;
2600 }
2601
2602 static int fbcon_copy_font(struct vc_data *vc, int con)
2603 {
2604         struct display *od = &fb_display[con];
2605         struct console_font *f = &vc->vc_font;
2606
2607         if (od->fontdata == f->data)
2608                 return 0;       /* already the same font... */
2609         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2610 }
2611
2612 /*
2613  *  User asked to set font; we are guaranteed that
2614  *      a) width and height are in range 1..32
2615  *      b) charcount does not exceed 512
2616  *  but lets not assume that, since someone might someday want to use larger
2617  *  fonts. And charcount of 512 is small for unicode support.
2618  *
2619  *  However, user space gives the font in 32 rows , regardless of
2620  *  actual font height. So a new API is needed if support for larger fonts
2621  *  is ever implemented.
2622  */
2623
2624 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2625                           unsigned int flags)
2626 {
2627         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2628         unsigned charcount = font->charcount;
2629         int w = font->width;
2630         int h = font->height;
2631         int size;
2632         int i, csum;
2633         u8 *new_data, *data = font->data;
2634         int pitch = (font->width+7) >> 3;
2635
2636         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2637          * If not this check should be changed to charcount < 256 */
2638         if (charcount != 256 && charcount != 512)
2639                 return -EINVAL;
2640
2641         /* Make sure drawing engine can handle the font */
2642         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2643             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2644                 return -EINVAL;
2645
2646         /* Make sure driver can handle the font length */
2647         if (fbcon_invalid_charcount(info, charcount))
2648                 return -EINVAL;
2649
2650         size = h * pitch * charcount;
2651
2652         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2653
2654         if (!new_data)
2655                 return -ENOMEM;
2656
2657         new_data += FONT_EXTRA_WORDS * sizeof(int);
2658         FNTSIZE(new_data) = size;
2659         FNTCHARCNT(new_data) = charcount;
2660         REFCOUNT(new_data) = 0; /* usage counter */
2661         for (i=0; i< charcount; i++) {
2662                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2663         }
2664
2665         /* Since linux has a nice crc32 function use it for counting font
2666          * checksums. */
2667         csum = crc32(0, new_data, size);
2668
2669         FNTSUM(new_data) = csum;
2670         /* Check if the same font is on some other console already */
2671         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2672                 struct vc_data *tmp = vc_cons[i].d;
2673
2674                 if (fb_display[i].userfont &&
2675                     fb_display[i].fontdata &&
2676                     FNTSUM(fb_display[i].fontdata) == csum &&
2677                     FNTSIZE(fb_display[i].fontdata) == size &&
2678                     tmp->vc_font.width == w &&
2679                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2680                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2681                         new_data = (u8 *)fb_display[i].fontdata;
2682                         break;
2683                 }
2684         }
2685         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2686 }
2687
2688 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2689 {
2690         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2691         const struct font_desc *f;
2692
2693         if (!name)
2694                 f = get_default_font(info->var.xres, info->var.yres,
2695                                      info->pixmap.blit_x, info->pixmap.blit_y);
2696         else if (!(f = find_font(name)))
2697                 return -ENOENT;
2698
2699         font->width = f->width;
2700         font->height = f->height;
2701         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2702 }
2703
2704 static u16 palette_red[16];
2705 static u16 palette_green[16];
2706 static u16 palette_blue[16];
2707
2708 static struct fb_cmap palette_cmap = {
2709         0, 16, palette_red, palette_green, palette_blue, NULL
2710 };
2711
2712 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2713 {
2714         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2715         int i, j, k, depth;
2716         u8 val;
2717
2718         if (fbcon_is_inactive(vc, info))
2719                 return;
2720
2721         if (!con_is_visible(vc))
2722                 return;
2723
2724         depth = fb_get_color_depth(&info->var, &info->fix);
2725         if (depth > 3) {
2726                 for (i = j = 0; i < 16; i++) {
2727                         k = table[i];
2728                         val = vc->vc_palette[j++];
2729                         palette_red[k] = (val << 8) | val;
2730                         val = vc->vc_palette[j++];
2731                         palette_green[k] = (val << 8) | val;
2732                         val = vc->vc_palette[j++];
2733                         palette_blue[k] = (val << 8) | val;
2734                 }
2735                 palette_cmap.len = 16;
2736                 palette_cmap.start = 0;
2737         /*
2738          * If framebuffer is capable of less than 16 colors,
2739          * use default palette of fbcon.
2740          */
2741         } else
2742                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2743
2744         fb_set_cmap(&palette_cmap, info);
2745 }
2746
2747 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2748 {
2749         unsigned long p;
2750         int line;
2751
2752         if (vc->vc_num != fg_console || !softback_lines)
2753                 return (u16 *) (vc->vc_origin + offset);
2754         line = offset / vc->vc_size_row;
2755         if (line >= softback_lines)
2756                 return (u16 *) (vc->vc_origin + offset -
2757                                 softback_lines * vc->vc_size_row);
2758         p = softback_curr + offset;
2759         if (p >= softback_end)
2760                 p += softback_buf - softback_end;
2761         return (u16 *) p;
2762 }
2763
2764 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2765                                  int *px, int *py)
2766 {
2767         unsigned long ret;
2768         int x, y;
2769
2770         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2771                 unsigned long offset = (pos - vc->vc_origin) / 2;
2772
2773                 x = offset % vc->vc_cols;
2774                 y = offset / vc->vc_cols;
2775                 if (vc->vc_num == fg_console)
2776                         y += softback_lines;
2777                 ret = pos + (vc->vc_cols - x) * 2;
2778         } else if (vc->vc_num == fg_console && softback_lines) {
2779                 unsigned long offset = pos - softback_curr;
2780
2781                 if (pos < softback_curr)
2782                         offset += softback_end - softback_buf;
2783                 offset /= 2;
2784                 x = offset % vc->vc_cols;
2785                 y = offset / vc->vc_cols;
2786                 ret = pos + (vc->vc_cols - x) * 2;
2787                 if (ret == softback_end)
2788                         ret = softback_buf;
2789                 if (ret == softback_in)
2790                         ret = vc->vc_origin;
2791         } else {
2792                 /* Should not happen */
2793                 x = y = 0;
2794                 ret = vc->vc_origin;
2795         }
2796         if (px)
2797                 *px = x;
2798         if (py)
2799                 *py = y;
2800         return ret;
2801 }
2802
2803 /* As we might be inside of softback, we may work with non-contiguous buffer,
2804    that's why we have to use a separate routine. */
2805 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2806 {
2807         while (cnt--) {
2808                 u16 a = scr_readw(p);
2809                 if (!vc->vc_can_do_color)
2810                         a ^= 0x0800;
2811                 else if (vc->vc_hi_font_mask == 0x100)
2812                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2813                             (((a) & 0x0e00) << 4);
2814                 else
2815                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2816                             (((a) & 0x0700) << 4);
2817                 scr_writew(a, p++);
2818                 if (p == (u16 *) softback_end)
2819                         p = (u16 *) softback_buf;
2820                 if (p == (u16 *) softback_in)
2821                         p = (u16 *) vc->vc_origin;
2822         }
2823 }
2824
2825 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2826 {
2827         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2828         struct fbcon_ops *ops = info->fbcon_par;
2829         struct display *disp = &fb_display[fg_console];
2830         int offset, limit, scrollback_old;
2831
2832         if (softback_top) {
2833                 if (vc->vc_num != fg_console)
2834                         return;
2835                 if (vc->vc_mode != KD_TEXT || !lines)
2836                         return;
2837                 if (logo_shown >= 0) {
2838                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2839
2840                         if (conp2->vc_top == logo_lines
2841                             && conp2->vc_bottom == conp2->vc_rows)
2842                                 conp2->vc_top = 0;
2843                         if (logo_shown == vc->vc_num) {
2844                                 unsigned long p, q;
2845                                 int i;
2846
2847                                 p = softback_in;
2848                                 q = vc->vc_origin +
2849                                     logo_lines * vc->vc_size_row;
2850                                 for (i = 0; i < logo_lines; i++) {
2851                                         if (p == softback_top)
2852                                                 break;
2853                                         if (p == softback_buf)
2854                                                 p = softback_end;
2855                                         p -= vc->vc_size_row;
2856                                         q -= vc->vc_size_row;
2857                                         scr_memcpyw((u16 *) q, (u16 *) p,
2858                                                     vc->vc_size_row);
2859                                 }
2860                                 softback_in = softback_curr = p;
2861                                 update_region(vc, vc->vc_origin,
2862                                               logo_lines * vc->vc_cols);
2863                         }
2864                         logo_shown = FBCON_LOGO_CANSHOW;
2865                 }
2866                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2867                 fbcon_redraw_softback(vc, disp, lines);
2868                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2869                 return;
2870         }
2871
2872         if (!scrollback_phys_max)
2873                 return;
2874
2875         scrollback_old = scrollback_current;
2876         scrollback_current -= lines;
2877         if (scrollback_current < 0)
2878                 scrollback_current = 0;
2879         else if (scrollback_current > scrollback_max)
2880                 scrollback_current = scrollback_max;
2881         if (scrollback_current == scrollback_old)
2882                 return;
2883
2884         if (fbcon_is_inactive(vc, info))
2885                 return;
2886
2887         fbcon_cursor(vc, CM_ERASE);
2888
2889         offset = disp->yscroll - scrollback_current;
2890         limit = disp->vrows;
2891         switch (disp->scrollmode) {
2892         case SCROLL_WRAP_MOVE:
2893                 info->var.vmode |= FB_VMODE_YWRAP;
2894                 break;
2895         case SCROLL_PAN_MOVE:
2896         case SCROLL_PAN_REDRAW:
2897                 limit -= vc->vc_rows;
2898                 info->var.vmode &= ~FB_VMODE_YWRAP;
2899                 break;
2900         }
2901         if (offset < 0)
2902                 offset += limit;
2903         else if (offset >= limit)
2904                 offset -= limit;
2905
2906         ops->var.xoffset = 0;
2907         ops->var.yoffset = offset * vc->vc_font.height;
2908         ops->update_start(info);
2909
2910         if (!scrollback_current)
2911                 fbcon_cursor(vc, CM_DRAW);
2912 }
2913
2914 static int fbcon_set_origin(struct vc_data *vc)
2915 {
2916         if (softback_lines)
2917                 fbcon_scrolldelta(vc, softback_lines);
2918         return 0;
2919 }
2920
2921 static void fbcon_suspended(struct fb_info *info)
2922 {
2923         struct vc_data *vc = NULL;
2924         struct fbcon_ops *ops = info->fbcon_par;
2925
2926         if (!ops || ops->currcon < 0)
2927                 return;
2928         vc = vc_cons[ops->currcon].d;
2929
2930         /* Clear cursor, restore saved data */
2931         fbcon_cursor(vc, CM_ERASE);
2932 }
2933
2934 static void fbcon_resumed(struct fb_info *info)
2935 {
2936         struct vc_data *vc;
2937         struct fbcon_ops *ops = info->fbcon_par;
2938
2939         if (!ops || ops->currcon < 0)
2940                 return;
2941         vc = vc_cons[ops->currcon].d;
2942
2943         update_screen(vc);
2944 }
2945
2946 static void fbcon_modechanged(struct fb_info *info)
2947 {
2948         struct fbcon_ops *ops = info->fbcon_par;
2949         struct vc_data *vc;
2950         struct display *p;
2951         int rows, cols;
2952
2953         if (!ops || ops->currcon < 0)
2954                 return;
2955         vc = vc_cons[ops->currcon].d;
2956         if (vc->vc_mode != KD_TEXT ||
2957             registered_fb[con2fb_map[ops->currcon]] != info)
2958                 return;
2959
2960         p = &fb_display[vc->vc_num];
2961         set_blitting_type(vc, info);
2962
2963         if (con_is_visible(vc)) {
2964                 var_to_display(p, &info->var, info);
2965                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2966                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2967                 cols /= vc->vc_font.width;
2968                 rows /= vc->vc_font.height;
2969                 vc_resize(vc, cols, rows);
2970                 updatescrollmode(p, info, vc);
2971                 scrollback_max = 0;
2972                 scrollback_current = 0;
2973
2974                 if (!fbcon_is_inactive(vc, info)) {
2975                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2976                     ops->update_start(info);
2977                 }
2978
2979                 fbcon_set_palette(vc, color_table);
2980                 update_screen(vc);
2981                 if (softback_buf)
2982                         fbcon_update_softback(vc);
2983         }
2984 }
2985
2986 static void fbcon_set_all_vcs(struct fb_info *info)
2987 {
2988         struct fbcon_ops *ops = info->fbcon_par;
2989         struct vc_data *vc;
2990         struct display *p;
2991         int i, rows, cols, fg = -1;
2992
2993         if (!ops || ops->currcon < 0)
2994                 return;
2995
2996         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2997                 vc = vc_cons[i].d;
2998                 if (!vc || vc->vc_mode != KD_TEXT ||
2999                     registered_fb[con2fb_map[i]] != info)
3000                         continue;
3001
3002                 if (con_is_visible(vc)) {
3003                         fg = i;
3004                         continue;
3005                 }
3006
3007                 p = &fb_display[vc->vc_num];
3008                 set_blitting_type(vc, info);
3009                 var_to_display(p, &info->var, info);
3010                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
3011                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
3012                 cols /= vc->vc_font.width;
3013                 rows /= vc->vc_font.height;
3014                 vc_resize(vc, cols, rows);
3015         }
3016
3017         if (fg != -1)
3018                 fbcon_modechanged(info);
3019 }
3020
3021 static int fbcon_mode_deleted(struct fb_info *info,
3022                               struct fb_videomode *mode)
3023 {
3024         struct fb_info *fb_info;
3025         struct display *p;
3026         int i, j, found = 0;
3027
3028         /* before deletion, ensure that mode is not in use */
3029         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3030                 j = con2fb_map[i];
3031                 if (j == -1)
3032                         continue;
3033                 fb_info = registered_fb[j];
3034                 if (fb_info != info)
3035                         continue;
3036                 p = &fb_display[i];
3037                 if (!p || !p->mode)
3038                         continue;
3039                 if (fb_mode_is_equal(p->mode, mode)) {
3040                         found = 1;
3041                         break;
3042                 }
3043         }
3044         return found;
3045 }
3046
3047 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3048 static int fbcon_unbind(void)
3049 {
3050         int ret;
3051
3052         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3053                                 fbcon_is_default);
3054
3055         if (!ret)
3056                 fbcon_has_console_bind = 0;
3057
3058         return ret;
3059 }
3060 #else
3061 static inline int fbcon_unbind(void)
3062 {
3063         return -EINVAL;
3064 }
3065 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3066
3067 /* called with console_lock held */
3068 static int fbcon_fb_unbind(int idx)
3069 {
3070         int i, new_idx = -1, ret = 0;
3071
3072         WARN_CONSOLE_UNLOCKED();
3073
3074         if (!fbcon_has_console_bind)
3075                 return 0;
3076
3077         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3078                 if (con2fb_map[i] != idx &&
3079                     con2fb_map[i] != -1) {
3080                         new_idx = con2fb_map[i];
3081                         break;
3082                 }
3083         }
3084
3085         if (new_idx != -1) {
3086                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3087                         if (con2fb_map[i] == idx)
3088                                 set_con2fb_map(i, new_idx, 0);
3089                 }
3090         } else {
3091                 struct fb_info *info = registered_fb[idx];
3092
3093                 /* This is sort of like set_con2fb_map, except it maps
3094                  * the consoles to no device and then releases the
3095                  * oldinfo to free memory and cancel the cursor blink
3096                  * timer. I can imagine this just becoming part of
3097                  * set_con2fb_map where new_idx is -1
3098                  */
3099                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3100                         if (con2fb_map[i] == idx) {
3101                                 con2fb_map[i] = -1;
3102                                 if (!search_fb_in_map(idx)) {
3103                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3104                                                                      info, NULL, i,
3105                                                                      idx, 0);
3106                                         if (ret) {
3107                                                 con2fb_map[i] = idx;
3108                                                 return ret;
3109                                         }
3110                                 }
3111                         }
3112                 }
3113                 ret = fbcon_unbind();
3114         }
3115
3116         return ret;
3117 }
3118
3119 /* called with console_lock held */
3120 static int fbcon_fb_unregistered(struct fb_info *info)
3121 {
3122         int i, idx;
3123
3124         WARN_CONSOLE_UNLOCKED();
3125
3126         if (deferred_takeover)
3127                 return 0;
3128
3129         idx = info->node;
3130         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3131                 if (con2fb_map[i] == idx)
3132                         con2fb_map[i] = -1;
3133         }
3134
3135         if (idx == info_idx) {
3136                 info_idx = -1;
3137
3138                 for_each_registered_fb(i) {
3139                         info_idx = i;
3140                         break;
3141                 }
3142         }
3143
3144         if (info_idx != -1) {
3145                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3146                         if (con2fb_map[i] == -1)
3147                                 con2fb_map[i] = info_idx;
3148                 }
3149         }
3150
3151         if (primary_device == idx)
3152                 primary_device = -1;
3153
3154         if (!num_registered_fb)
3155                 do_unregister_con_driver(&fb_con);
3156
3157         return 0;
3158 }
3159
3160 /* called with console_lock held */
3161 static void fbcon_remap_all(int idx)
3162 {
3163         int i;
3164
3165         WARN_CONSOLE_UNLOCKED();
3166
3167         if (deferred_takeover) {
3168                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3169                         con2fb_map_boot[i] = idx;
3170                 fbcon_map_override();
3171                 return;
3172         }
3173
3174         for (i = first_fb_vc; i <= last_fb_vc; i++)
3175                 set_con2fb_map(i, idx, 0);
3176
3177         if (con_is_bound(&fb_con)) {
3178                 printk(KERN_INFO "fbcon: Remapping primary device, "
3179                        "fb%i, to tty %i-%i\n", idx,
3180                        first_fb_vc + 1, last_fb_vc + 1);
3181                 info_idx = idx;
3182         }
3183 }
3184
3185 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3186 static void fbcon_select_primary(struct fb_info *info)
3187 {
3188         if (!map_override && primary_device == -1 &&
3189             fb_is_primary_device(info)) {
3190                 int i;
3191
3192                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3193                        info->fix.id, info->node);
3194                 primary_device = info->node;
3195
3196                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3197                         con2fb_map_boot[i] = primary_device;
3198
3199                 if (con_is_bound(&fb_con)) {
3200                         printk(KERN_INFO "fbcon: Remapping primary device, "
3201                                "fb%i, to tty %i-%i\n", info->node,
3202                                first_fb_vc + 1, last_fb_vc + 1);
3203                         info_idx = primary_device;
3204                 }
3205         }
3206
3207 }
3208 #else
3209 static inline void fbcon_select_primary(struct fb_info *info)
3210 {
3211         return;
3212 }
3213 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3214
3215 /* called with console_lock held */
3216 static int fbcon_fb_registered(struct fb_info *info)
3217 {
3218         int ret = 0, i, idx;
3219
3220         WARN_CONSOLE_UNLOCKED();
3221
3222         idx = info->node;
3223         fbcon_select_primary(info);
3224
3225         if (deferred_takeover) {
3226                 pr_info("fbcon: Deferring console take-over\n");
3227                 return 0;
3228         }
3229
3230         if (info_idx == -1) {
3231                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3232                         if (con2fb_map_boot[i] == idx) {
3233                                 info_idx = idx;
3234                                 break;
3235                         }
3236                 }
3237
3238                 if (info_idx != -1)
3239                         ret = do_fbcon_takeover(1);
3240         } else {
3241                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3242                         if (con2fb_map_boot[i] == idx)
3243                                 set_con2fb_map(i, idx, 0);
3244                 }
3245         }
3246
3247         return ret;
3248 }
3249
3250 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3251 {
3252         struct fbcon_ops *ops = info->fbcon_par;
3253         struct vc_data *vc;
3254
3255         if (!ops || ops->currcon < 0)
3256                 return;
3257
3258         vc = vc_cons[ops->currcon].d;
3259         if (vc->vc_mode != KD_TEXT ||
3260                         registered_fb[con2fb_map[ops->currcon]] != info)
3261                 return;
3262
3263         if (con_is_visible(vc)) {
3264                 if (blank)
3265                         do_blank_screen(0);
3266                 else
3267                         do_unblank_screen(0);
3268         }
3269         ops->blank_state = blank;
3270 }
3271
3272 static void fbcon_new_modelist(struct fb_info *info)
3273 {
3274         int i;
3275         struct vc_data *vc;
3276         struct fb_var_screeninfo var;
3277         const struct fb_videomode *mode;
3278
3279         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3280                 if (registered_fb[con2fb_map[i]] != info)
3281                         continue;
3282                 if (!fb_display[i].mode)
3283                         continue;
3284                 vc = vc_cons[i].d;
3285                 display_to_var(&var, &fb_display[i]);
3286                 mode = fb_find_nearest_mode(fb_display[i].mode,
3287                                             &info->modelist);
3288                 fb_videomode_to_var(&var, mode);
3289                 fbcon_set_disp(info, &var, vc->vc_num);
3290         }
3291 }
3292
3293 static void fbcon_get_requirement(struct fb_info *info,
3294                                   struct fb_blit_caps *caps)
3295 {
3296         struct vc_data *vc;
3297         struct display *p;
3298
3299         if (caps->flags) {
3300                 int i, charcnt;
3301
3302                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3303                         vc = vc_cons[i].d;
3304                         if (vc && vc->vc_mode == KD_TEXT &&
3305                             info->node == con2fb_map[i]) {
3306                                 p = &fb_display[i];
3307                                 caps->x |= 1 << (vc->vc_font.width - 1);
3308                                 caps->y |= 1 << (vc->vc_font.height - 1);
3309                                 charcnt = (p->userfont) ?
3310                                         FNTCHARCNT(p->fontdata) : 256;
3311                                 if (caps->len < charcnt)
3312                                         caps->len = charcnt;
3313                         }
3314                 }
3315         } else {
3316                 vc = vc_cons[fg_console].d;
3317
3318                 if (vc && vc->vc_mode == KD_TEXT &&
3319                     info->node == con2fb_map[fg_console]) {
3320                         p = &fb_display[fg_console];
3321                         caps->x = 1 << (vc->vc_font.width - 1);
3322                         caps->y = 1 << (vc->vc_font.height - 1);
3323                         caps->len = (p->userfont) ?
3324                                 FNTCHARCNT(p->fontdata) : 256;
3325                 }
3326         }
3327 }
3328
3329 static int fbcon_event_notify(struct notifier_block *self,
3330                               unsigned long action, void *data)
3331 {
3332         struct fb_event *event = data;
3333         struct fb_info *info = event->info;
3334         struct fb_videomode *mode;
3335         struct fb_con2fbmap *con2fb;
3336         struct fb_blit_caps *caps;
3337         int idx, ret = 0;
3338
3339         /*
3340          * ignore all events except driver registration and deregistration
3341          * if fbcon is not active
3342          */
3343         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3344                                   action == FB_EVENT_FB_UNREGISTERED))
3345                 goto done;
3346
3347         switch(action) {
3348         case FB_EVENT_SUSPEND:
3349                 fbcon_suspended(info);
3350                 break;
3351         case FB_EVENT_RESUME:
3352                 fbcon_resumed(info);
3353                 break;
3354         case FB_EVENT_MODE_CHANGE:
3355                 fbcon_modechanged(info);
3356                 break;
3357         case FB_EVENT_MODE_CHANGE_ALL:
3358                 fbcon_set_all_vcs(info);
3359                 break;
3360         case FB_EVENT_MODE_DELETE:
3361                 mode = event->data;
3362                 ret = fbcon_mode_deleted(info, mode);
3363                 break;
3364         case FB_EVENT_FB_UNBIND:
3365                 idx = info->node;
3366                 ret = fbcon_fb_unbind(idx);
3367                 break;
3368         case FB_EVENT_FB_REGISTERED:
3369                 ret = fbcon_fb_registered(info);
3370                 break;
3371         case FB_EVENT_FB_UNREGISTERED:
3372                 ret = fbcon_fb_unregistered(info);
3373                 break;
3374         case FB_EVENT_SET_CONSOLE_MAP:
3375                 /* called with console lock held */
3376                 con2fb = event->data;
3377                 ret = set_con2fb_map(con2fb->console - 1,
3378                                      con2fb->framebuffer, 1);
3379                 break;
3380         case FB_EVENT_GET_CONSOLE_MAP:
3381                 con2fb = event->data;
3382                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3383                 break;
3384         case FB_EVENT_BLANK:
3385                 fbcon_fb_blanked(info, *(int *)event->data);
3386                 break;
3387         case FB_EVENT_NEW_MODELIST:
3388                 fbcon_new_modelist(info);
3389                 break;
3390         case FB_EVENT_GET_REQ:
3391                 caps = event->data;
3392                 fbcon_get_requirement(info, caps);
3393                 break;
3394         case FB_EVENT_REMAP_ALL_CONSOLE:
3395                 idx = info->node;
3396                 fbcon_remap_all(idx);
3397                 break;
3398         }
3399 done:
3400         return ret;
3401 }
3402
3403 /*
3404  *  The console `switch' structure for the frame buffer based console
3405  */
3406
3407 static const struct consw fb_con = {
3408         .owner                  = THIS_MODULE,
3409         .con_startup            = fbcon_startup,
3410         .con_init               = fbcon_init,
3411         .con_deinit             = fbcon_deinit,
3412         .con_clear              = fbcon_clear,
3413         .con_putc               = fbcon_putc,
3414         .con_putcs              = fbcon_putcs,
3415         .con_cursor             = fbcon_cursor,
3416         .con_scroll             = fbcon_scroll,
3417         .con_switch             = fbcon_switch,
3418         .con_blank              = fbcon_blank,
3419         .con_font_set           = fbcon_set_font,
3420         .con_font_get           = fbcon_get_font,
3421         .con_font_default       = fbcon_set_def_font,
3422         .con_font_copy          = fbcon_copy_font,
3423         .con_set_palette        = fbcon_set_palette,
3424         .con_scrolldelta        = fbcon_scrolldelta,
3425         .con_set_origin         = fbcon_set_origin,
3426         .con_invert_region      = fbcon_invert_region,
3427         .con_screen_pos         = fbcon_screen_pos,
3428         .con_getxy              = fbcon_getxy,
3429         .con_resize             = fbcon_resize,
3430         .con_debug_enter        = fbcon_debug_enter,
3431         .con_debug_leave        = fbcon_debug_leave,
3432 };
3433
3434 static struct notifier_block fbcon_event_notifier = {
3435         .notifier_call  = fbcon_event_notify,
3436 };
3437
3438 static ssize_t store_rotate(struct device *device,
3439                             struct device_attribute *attr, const char *buf,
3440                             size_t count)
3441 {
3442         struct fb_info *info;
3443         int rotate, idx;
3444         char **last = NULL;
3445
3446         if (fbcon_has_exited)
3447                 return count;
3448
3449         console_lock();
3450         idx = con2fb_map[fg_console];
3451
3452         if (idx == -1 || registered_fb[idx] == NULL)
3453                 goto err;
3454
3455         info = registered_fb[idx];
3456         rotate = simple_strtoul(buf, last, 0);
3457         fbcon_rotate(info, rotate);
3458 err:
3459         console_unlock();
3460         return count;
3461 }
3462
3463 static ssize_t store_rotate_all(struct device *device,
3464                                 struct device_attribute *attr,const char *buf,
3465                                 size_t count)
3466 {
3467         struct fb_info *info;
3468         int rotate, idx;
3469         char **last = NULL;
3470
3471         if (fbcon_has_exited)
3472                 return count;
3473
3474         console_lock();
3475         idx = con2fb_map[fg_console];
3476
3477         if (idx == -1 || registered_fb[idx] == NULL)
3478                 goto err;
3479
3480         info = registered_fb[idx];
3481         rotate = simple_strtoul(buf, last, 0);
3482         fbcon_rotate_all(info, rotate);
3483 err:
3484         console_unlock();
3485         return count;
3486 }
3487
3488 static ssize_t show_rotate(struct device *device,
3489                            struct device_attribute *attr,char *buf)
3490 {
3491         struct fb_info *info;
3492         int rotate = 0, idx;
3493
3494         if (fbcon_has_exited)
3495                 return 0;
3496
3497         console_lock();
3498         idx = con2fb_map[fg_console];
3499
3500         if (idx == -1 || registered_fb[idx] == NULL)
3501                 goto err;
3502
3503         info = registered_fb[idx];
3504         rotate = fbcon_get_rotate(info);
3505 err:
3506         console_unlock();
3507         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3508 }
3509
3510 static ssize_t show_cursor_blink(struct device *device,
3511                                  struct device_attribute *attr, char *buf)
3512 {
3513         struct fb_info *info;
3514         struct fbcon_ops *ops;
3515         int idx, blink = -1;
3516
3517         if (fbcon_has_exited)
3518                 return 0;
3519
3520         console_lock();
3521         idx = con2fb_map[fg_console];
3522
3523         if (idx == -1 || registered_fb[idx] == NULL)
3524                 goto err;
3525
3526         info = registered_fb[idx];
3527         ops = info->fbcon_par;
3528
3529         if (!ops)
3530                 goto err;
3531
3532         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3533 err:
3534         console_unlock();
3535         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3536 }
3537
3538 static ssize_t store_cursor_blink(struct device *device,
3539                                   struct device_attribute *attr,
3540                                   const char *buf, size_t count)
3541 {
3542         struct fb_info *info;
3543         int blink, idx;
3544         char **last = NULL;
3545
3546         if (fbcon_has_exited)
3547                 return count;
3548
3549         console_lock();
3550         idx = con2fb_map[fg_console];
3551
3552         if (idx == -1 || registered_fb[idx] == NULL)
3553                 goto err;
3554
3555         info = registered_fb[idx];
3556
3557         if (!info->fbcon_par)
3558                 goto err;
3559
3560         blink = simple_strtoul(buf, last, 0);
3561
3562         if (blink) {
3563                 fbcon_cursor_noblink = 0;
3564                 fbcon_add_cursor_timer(info);
3565         } else {
3566                 fbcon_cursor_noblink = 1;
3567                 fbcon_del_cursor_timer(info);
3568         }
3569
3570 err:
3571         console_unlock();
3572         return count;
3573 }
3574
3575 static struct device_attribute device_attrs[] = {
3576         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3577         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3578         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3579                store_cursor_blink),
3580 };
3581
3582 static int fbcon_init_device(void)
3583 {
3584         int i, error = 0;
3585
3586         fbcon_has_sysfs = 1;
3587
3588         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3589                 error = device_create_file(fbcon_device, &device_attrs[i]);
3590
3591                 if (error)
3592                         break;
3593         }
3594
3595         if (error) {
3596                 while (--i >= 0)
3597                         device_remove_file(fbcon_device, &device_attrs[i]);
3598
3599                 fbcon_has_sysfs = 0;
3600         }
3601
3602         return 0;
3603 }
3604
3605 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3606 static void fbcon_register_existing_fbs(struct work_struct *work)
3607 {
3608         int i;
3609
3610         console_lock();
3611
3612         for_each_registered_fb(i)
3613                 fbcon_fb_registered(registered_fb[i]);
3614
3615         console_unlock();
3616 }
3617
3618 static struct notifier_block fbcon_output_nb;
3619 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3620
3621 static int fbcon_output_notifier(struct notifier_block *nb,
3622                                  unsigned long action, void *data)
3623 {
3624         WARN_CONSOLE_UNLOCKED();
3625
3626         pr_info("fbcon: Taking over console\n");
3627
3628         dummycon_unregister_output_notifier(&fbcon_output_nb);
3629         deferred_takeover = false;
3630         logo_shown = FBCON_LOGO_DONTSHOW;
3631
3632         /* We may get called in atomic context */
3633         schedule_work(&fbcon_deferred_takeover_work);
3634
3635         return NOTIFY_OK;
3636 }
3637 #endif
3638
3639 static void fbcon_start(void)
3640 {
3641         WARN_CONSOLE_UNLOCKED();
3642
3643 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3644         if (conswitchp != &dummy_con)
3645                 deferred_takeover = false;
3646
3647         if (deferred_takeover) {
3648                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3649                 dummycon_register_output_notifier(&fbcon_output_nb);
3650                 return;
3651         }
3652 #endif
3653
3654         if (num_registered_fb) {
3655                 int i;
3656
3657                 for_each_registered_fb(i) {
3658                         info_idx = i;
3659                         break;
3660                 }
3661
3662                 do_fbcon_takeover(0);
3663         }
3664 }
3665
3666 static void fbcon_exit(void)
3667 {
3668         struct fb_info *info;
3669         int i, j, mapped;
3670
3671         if (fbcon_has_exited)
3672                 return;
3673
3674 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3675         if (deferred_takeover) {
3676                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3677                 deferred_takeover = false;
3678         }
3679 #endif
3680
3681         kvfree((void *)softback_buf);
3682         softback_buf = 0UL;
3683
3684         for_each_registered_fb(i) {
3685                 int pending = 0;
3686
3687                 mapped = 0;
3688                 info = registered_fb[i];
3689
3690                 if (info->queue.func)
3691                         pending = cancel_work_sync(&info->queue);
3692                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3693                         "no"));
3694
3695                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3696                         if (con2fb_map[j] == i) {
3697                                 mapped = 1;
3698                                 break;
3699                         }
3700                 }
3701
3702                 if (mapped) {
3703                         if (info->fbops->fb_release)
3704                                 info->fbops->fb_release(info, 0);
3705                         module_put(info->fbops->owner);
3706
3707                         if (info->fbcon_par) {
3708                                 struct fbcon_ops *ops = info->fbcon_par;
3709
3710                                 fbcon_del_cursor_timer(info);
3711                                 kfree(ops->cursor_src);
3712                                 kfree(ops->cursor_state.mask);
3713                                 kfree(info->fbcon_par);
3714                                 info->fbcon_par = NULL;
3715                         }
3716
3717                         if (info->queue.func == fb_flashcursor)
3718                                 info->queue.func = NULL;
3719                 }
3720         }
3721
3722         fbcon_has_exited = 1;
3723 }
3724
3725 void __init fb_console_init(void)
3726 {
3727         int i;
3728
3729         console_lock();
3730         fb_register_client(&fbcon_event_notifier);
3731         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3732                                      "fbcon");
3733
3734         if (IS_ERR(fbcon_device)) {
3735                 printk(KERN_WARNING "Unable to create device "
3736                        "for fbcon; errno = %ld\n",
3737                        PTR_ERR(fbcon_device));
3738                 fbcon_device = NULL;
3739         } else
3740                 fbcon_init_device();
3741
3742         for (i = 0; i < MAX_NR_CONSOLES; i++)
3743                 con2fb_map[i] = -1;
3744
3745         fbcon_start();
3746         console_unlock();
3747 }
3748
3749 #ifdef MODULE
3750
3751 static void __exit fbcon_deinit_device(void)
3752 {
3753         int i;
3754
3755         if (fbcon_has_sysfs) {
3756                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3757                         device_remove_file(fbcon_device, &device_attrs[i]);
3758
3759                 fbcon_has_sysfs = 0;
3760         }
3761 }
3762
3763 void __exit fb_console_exit(void)
3764 {
3765         console_lock();
3766         fb_unregister_client(&fbcon_event_notifier);
3767         fbcon_deinit_device();
3768         device_destroy(fb_class, MKDEV(0, 0));
3769         fbcon_exit();
3770         do_unregister_con_driver(&fb_con);
3771         console_unlock();
3772 }
3773 #endif