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 [[email protected]]
  12  *
  13  *            with work by William Rucklidge ([email protected])
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen ([email protected])
  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 ([email protected])
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek ([email protected])
  31  *
  32  *  Random hacking by Martin Mares <[email protected]>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <[email protected]>
  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         return 1;
 515 }
 516
 517 __setup("fbcon=", fb_console_setup);
 518 #endif
 519
 520 static int search_fb_in_map(int idx)
 521 {
 522         int i, retval = 0;
 523
 524         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 525                 if (con2fb_map[i] == idx)
 526                         retval = 1;
 527         }
 528         return retval;
 529 }
 530
 531 static int search_for_mapped_con(void)
 532 {
 533         int i, retval = 0;
 534
 535         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 536                 if (con2fb_map[i] != -1)
 537                         retval = 1;
 538         }
 539         return retval;
 540 }
 541
 542 static int do_fbcon_takeover(int show_logo)
 543 {
 544         int err, i;
 545
 546         if (!num_registered_fb)
 547                 return -ENODEV;
 548
 549         if (!show_logo)
 550                 logo_shown = FBCON_LOGO_DONTSHOW;
 551
 552         for (i = first_fb_vc; i <= last_fb_vc; i++)
 553                 con2fb_map[i] = info_idx;
 554
 555         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 556                                 fbcon_is_default);
 557
 558         if (err) {
 559                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 560                         con2fb_map[i] = -1;
 561                 info_idx = -1;
 562         } else {
 563                 fbcon_has_console_bind = 1;
 564         }
 565
 566         return err;
 567 }
 568
 569 #ifdef MODULE
 570 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 571                                int cols, int rows, int new_cols, int new_rows)
 572 {
 573         logo_shown = FBCON_LOGO_DONTSHOW;
 574 }
 575 #else
 576 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 577                                int cols, int rows, int new_cols, int new_rows)
 578 {
 579         /* Need to make room for the logo */
 580         struct fbcon_ops *ops = info->fbcon_par;
 581         int cnt, erase = vc->vc_video_erase_char, step;
 582         unsigned short *save = NULL, *r, *q;
 583         int logo_height;
 584
 585         if (info->fbops->owner) {
 586                 logo_shown = FBCON_LOGO_DONTSHOW;
 587                 return;
 588         }
 589
 590         /*
 591          * remove underline attribute from erase character
 592          * if black and white framebuffer.
 593          */
 594         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 595                 erase &= ~0x400;
 596         logo_height = fb_prepare_logo(info, ops->rotate);
 597         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 598         q = (unsigned short *) (vc->vc_origin +
 599                                 vc->vc_size_row * rows);
 600         step = logo_lines * cols;
 601         for (r = q - logo_lines * cols; r < q; r++)
 602                 if (scr_readw(r) != vc->vc_video_erase_char)
 603                         break;
 604         if (r != q && new_rows >= rows + logo_lines) {
 605                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 606                                GFP_KERNEL);
 607                 if (save) {
 608                         int i = cols < new_cols ? cols : new_cols;
 609                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 610                         r = q - step;
 611                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 612                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 613                         r = q;
 614                 }
 615         }
 616         if (r == q) {
 617                 /* We can scroll screen down */
 618                 r = q - step - cols;
 619                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 620                         scr_memcpyw(r + step, r, vc->vc_size_row);
 621                         r -= cols;
 622                 }
 623                 if (!save) {
 624                         int lines;
 625                         if (vc->vc_y + logo_lines >= rows)
 626                                 lines = rows - vc->vc_y - 1;
 627                         else
 628                                 lines = logo_lines;
 629                         vc->vc_y += lines;
 630                         vc->vc_pos += lines * vc->vc_size_row;
 631                 }
 632         }
 633         scr_memsetw((unsigned short *) vc->vc_origin,
 634                     erase,
 635                     vc->vc_size_row * logo_lines);
 636
 637         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 638                 fbcon_clear_margins(vc, 0);
 639                 update_screen(vc);
 640         }
 641
 642         if (save) {
 643                 q = (unsigned short *) (vc->vc_origin +
 644                                         vc->vc_size_row *
 645                                         rows);
 646                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 647                 vc->vc_y += logo_lines;
 648                 vc->vc_pos += logo_lines * vc->vc_size_row;
 649                 kfree(save);
 650         }
 651
 652         if (logo_lines > vc->vc_bottom) {
 653                 logo_shown = FBCON_LOGO_CANSHOW;
 654                 printk(KERN_INFO
 655                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 656         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 657                 logo_shown = FBCON_LOGO_DRAW;
 658                 vc->vc_top = logo_lines;
 659         }
 660 }
 661 #endif /* MODULE */
 662
 663 #ifdef CONFIG_FB_TILEBLITTING
 664 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 665 {
 666         struct fbcon_ops *ops = info->fbcon_par;
 667
 668         ops->p = &fb_display[vc->vc_num];
 669
 670         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 671                 fbcon_set_tileops(vc, info);
 672         else {
 673                 fbcon_set_rotation(info);
 674                 fbcon_set_bitops(ops);
 675         }
 676 }
 677
 678 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 679 {
 680         int err = 0;
 681
 682         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 683             info->tileops->fb_get_tilemax(info) < charcount)
 684                 err = 1;
 685
 686         return err;
 687 }
 688 #else
 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 690 {
 691         struct fbcon_ops *ops = info->fbcon_par;
 692
 693         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 694         ops->p = &fb_display[vc->vc_num];
 695         fbcon_set_rotation(info);
 696         fbcon_set_bitops(ops);
 697 }
 698
 699 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 700 {
 701         return 0;
 702 }
 703
 704 #endif /* CONFIG_MISC_TILEBLITTING */
 705
 706
 707 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 708                                   int unit, int oldidx)
 709 {
 710         struct fbcon_ops *ops = NULL;
 711         int err = 0;
 712
 713         if (!try_module_get(info->fbops->owner))
 714                 err = -ENODEV;
 715
 716         if (!err && info->fbops->fb_open &&
 717             info->fbops->fb_open(info, 0))
 718                 err = -ENODEV;
 719
 720         if (!err) {
 721                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 722                 if (!ops)
 723                         err = -ENOMEM;
 724         }
 725
 726         if (!err) {
 727                 ops->cur_blink_jiffies = HZ / 5;
 728                 ops->info = info;
 729                 info->fbcon_par = ops;
 730
 731                 if (vc)
 732                         set_blitting_type(vc, info);
 733         }
 734
 735         if (err) {
 736                 con2fb_map[unit] = oldidx;
 737                 module_put(info->fbops->owner);
 738         }
 739
 740         return err;
 741 }
 742
 743 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 744                                   struct fb_info *newinfo, int unit,
 745                                   int oldidx, int found)
 746 {
 747         struct fbcon_ops *ops = oldinfo->fbcon_par;
 748         int err = 0, ret;
 749
 750         if (oldinfo->fbops->fb_release &&
 751             oldinfo->fbops->fb_release(oldinfo, 0)) {
 752                 con2fb_map[unit] = oldidx;
 753                 if (!found && newinfo->fbops->fb_release)
 754                         newinfo->fbops->fb_release(newinfo, 0);
 755                 if (!found)
 756                         module_put(newinfo->fbops->owner);
 757                 err = -ENODEV;
 758         }
 759
 760         if (!err) {
 761                 fbcon_del_cursor_timer(oldinfo);
 762                 kfree(ops->cursor_state.mask);
 763                 kfree(ops->cursor_data);
 764                 kfree(ops->cursor_src);
 765                 kfree(ops->fontbuffer);
 766                 kfree(oldinfo->fbcon_par);
 767                 oldinfo->fbcon_par = NULL;
 768                 module_put(oldinfo->fbops->owner);
 769                 /*
 770                   If oldinfo and newinfo are driving the same hardware,
 771                   the fb_release() method of oldinfo may attempt to
 772                   restore the hardware state.  This will leave the
 773                   newinfo in an undefined state. Thus, a call to
 774                   fb_set_par() may be needed for the newinfo.
 775                 */
 776                 if (newinfo && newinfo->fbops->fb_set_par) {
 777                         ret = newinfo->fbops->fb_set_par(newinfo);
 778
 779                         if (ret)
 780                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 781                                         "detected unhandled fb_set_par error, "
 782                                         "error code %d\n", ret);
 783                 }
 784         }
 785
 786         return err;
 787 }
 788
 789 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 790                                 int unit, int show_logo)
 791 {
 792         struct fbcon_ops *ops = info->fbcon_par;
 793         int ret;
 794
 795         ops->currcon = fg_console;
 796
 797         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 798                 ret = info->fbops->fb_set_par(info);
 799
 800                 if (ret)
 801                         printk(KERN_ERR "con2fb_init_display: detected "
 802                                 "unhandled fb_set_par error, "
 803                                 "error code %d\n", ret);
 804         }
 805
 806         ops->flags |= FBCON_FLAGS_INIT;
 807         ops->graphics = 0;
 808         fbcon_set_disp(info, &info->var, unit);
 809
 810         if (show_logo) {
 811                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 812                 struct fb_info *fg_info =
 813                         registered_fb[con2fb_map[fg_console]];
 814
 815                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 816                                    fg_vc->vc_rows, fg_vc->vc_cols,
 817                                    fg_vc->vc_rows);
 818         }
 819
 820         update_screen(vc_cons[fg_console].d);
 821 }
 822
 823 /**
 824  *      set_con2fb_map - map console to frame buffer device
 825  *      @unit: virtual console number to map
 826  *      @newidx: frame buffer index to map virtual console to
 827  *      @user: user request
 828  *
 829  *      Maps a virtual console @unit to a frame buffer device
 830  *      @newidx.
 831  *
 832  *      This should be called with the console lock held.
 833  */
 834 static int set_con2fb_map(int unit, int newidx, int user)
 835 {
 836         struct vc_data *vc = vc_cons[unit].d;
 837         int oldidx = con2fb_map[unit];
 838         struct fb_info *info = registered_fb[newidx];
 839         struct fb_info *oldinfo = NULL;
 840         int found, err = 0;
 841
 842         WARN_CONSOLE_UNLOCKED();
 843
 844         if (oldidx == newidx)
 845                 return 0;
 846
 847         if (!info)
 848                 return -EINVAL;
 849
 850         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 851                 info_idx = newidx;
 852                 return do_fbcon_takeover(0);
 853         }
 854
 855         if (oldidx != -1)
 856                 oldinfo = registered_fb[oldidx];
 857
 858         found = search_fb_in_map(newidx);
 859
 860         con2fb_map[unit] = newidx;
 861         if (!err && !found)
 862                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 863
 864
 865         /*
 866          * If old fb is not mapped to any of the consoles,
 867          * fbcon should release it.
 868          */
 869         if (!err && oldinfo && !search_fb_in_map(oldidx))
 870                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 871                                              found);
 872
 873         if (!err) {
 874                 int show_logo = (fg_console == 0 && !user &&
 875                                  logo_shown != FBCON_LOGO_DONTSHOW);
 876
 877                 if (!found)
 878                         fbcon_add_cursor_timer(info);
 879                 con2fb_map_boot[unit] = newidx;
 880                 con2fb_init_display(vc, info, unit, show_logo);
 881         }
 882
 883         if (!search_fb_in_map(info_idx))
 884                 info_idx = newidx;
 885
 886         return err;
 887 }
 888
 889 /*
 890  *  Low Level Operations
 891  */
 892 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 893 static int var_to_display(struct display *disp,
 894                           struct fb_var_screeninfo *var,
 895                           struct fb_info *info)
 896 {
 897         disp->xres_virtual = var->xres_virtual;
 898         disp->yres_virtual = var->yres_virtual;
 899         disp->bits_per_pixel = var->bits_per_pixel;
 900         disp->grayscale = var->grayscale;
 901         disp->nonstd = var->nonstd;
 902         disp->accel_flags = var->accel_flags;
 903         disp->height = var->height;
 904         disp->width = var->width;
 905         disp->red = var->red;
 906         disp->green = var->green;
 907         disp->blue = var->blue;
 908         disp->transp = var->transp;
 909         disp->rotate = var->rotate;
 910         disp->mode = fb_match_mode(var, &info->modelist);
 911         if (disp->mode == NULL)
 912                 /* This should not happen */
 913                 return -EINVAL;
 914         return 0;
 915 }
 916
 917 static void display_to_var(struct fb_var_screeninfo *var,
 918                            struct display *disp)
 919 {
 920         fb_videomode_to_var(var, disp->mode);
 921         var->xres_virtual = disp->xres_virtual;
 922         var->yres_virtual = disp->yres_virtual;
 923         var->bits_per_pixel = disp->bits_per_pixel;
 924         var->grayscale = disp->grayscale;
 925         var->nonstd = disp->nonstd;
 926         var->accel_flags = disp->accel_flags;
 927         var->height = disp->height;
 928         var->width = disp->width;
 929         var->red = disp->red;
 930         var->green = disp->green;
 931         var->blue = disp->blue;
 932         var->transp = disp->transp;
 933         var->rotate = disp->rotate;
 934 }
 935
 936 static const char *fbcon_startup(void)
 937 {
 938         const char *display_desc = "frame buffer device";
 939         struct display *p = &fb_display[fg_console];
 940         struct vc_data *vc = vc_cons[fg_console].d;
 941         const struct font_desc *font = NULL;
 942         struct module *owner;
 943         struct fb_info *info = NULL;
 944         struct fbcon_ops *ops;
 945         int rows, cols;
 946
 947         /*
 948          *  If num_registered_fb is zero, this is a call for the dummy part.
 949          *  The frame buffer devices weren't initialized yet.
 950          */
 951         if (!num_registered_fb || info_idx == -1)
 952                 return display_desc;
 953         /*
 954          * Instead of blindly using registered_fb[0], we use info_idx, set by
 955          * fb_console_init();
 956          */
 957         info = registered_fb[info_idx];
 958         if (!info)
 959                 return NULL;
 960
 961         owner = info->fbops->owner;
 962         if (!try_module_get(owner))
 963                 return NULL;
 964         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 965                 module_put(owner);
 966                 return NULL;
 967         }
 968
 969         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 970         if (!ops) {
 971                 module_put(owner);
 972                 return NULL;
 973         }
 974
 975         ops->currcon = -1;
 976         ops->graphics = 1;
 977         ops->cur_rotate = -1;
 978         ops->cur_blink_jiffies = HZ / 5;
 979         ops->info = info;
 980         info->fbcon_par = ops;
 981
 982         p->con_rotate = initial_rotation;
 983         if (p->con_rotate == -1)
 984                 p->con_rotate = info->fbcon_rotate_hint;
 985         if (p->con_rotate == -1)
 986                 p->con_rotate = FB_ROTATE_UR;
 987
 988         set_blitting_type(vc, info);
 989
 990         if (info->fix.type != FB_TYPE_TEXT) {
 991                 if (fbcon_softback_size) {
 992                         if (!softback_buf) {
 993                                 softback_buf =
 994                                     (unsigned long)
 995                                     kmalloc(fbcon_softback_size,
 996                                             GFP_KERNEL);
 997                                 if (!softback_buf) {
 998                                         fbcon_softback_size = 0;
 999                                         softback_top = 0;
1000                                 }
1001                         }
1002                 } else {
1003                         if (softback_buf) {
1004                                 kfree((void *) softback_buf);
1005                                 softback_buf = 0;
1006                                 softback_top = 0;
1007                         }
1008                 }
1009                 if (softback_buf)
1010                         softback_in = softback_top = softback_curr =
1011                             softback_buf;
1012                 softback_lines = 0;
1013         }
1014
1015         /* Setup default font */
1016         if (!p->fontdata && !vc->vc_font.data) {
1017                 if (!fontname[0] || !(font = find_font(fontname)))
1018                         font = get_default_font(info->var.xres,
1019                                                 info->var.yres,
1020                                                 info->pixmap.blit_x,
1021                                                 info->pixmap.blit_y);
1022                 vc->vc_font.width = font->width;
1023                 vc->vc_font.height = font->height;
1024                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1025                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1026         } else {
1027                 p->fontdata = vc->vc_font.data;
1028         }
1029
1030         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1031         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1032         cols /= vc->vc_font.width;
1033         rows /= vc->vc_font.height;
1034         vc_resize(vc, cols, rows);
1035
1036         DPRINTK("mode:   %s\n", info->fix.id);
1037         DPRINTK("visual: %d\n", info->fix.visual);
1038         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1039                 info->var.yres,
1040                 info->var.bits_per_pixel);
1041
1042         fbcon_add_cursor_timer(info);
1043         fbcon_has_exited = 0;
1044         return display_desc;
1045 }
1046
1047 static void fbcon_init(struct vc_data *vc, int init)
1048 {
1049         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1050         struct fbcon_ops *ops;
1051         struct vc_data **default_mode = vc->vc_display_fg;
1052         struct vc_data *svc = *default_mode;
1053         struct display *t, *p = &fb_display[vc->vc_num];
1054         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1055         int cap, ret;
1056
1057         if (info_idx == -1 || info == NULL)
1058             return;
1059
1060         cap = info->flags;
1061
1062         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1063             (info->fix.type == FB_TYPE_TEXT))
1064                 logo = 0;
1065
1066         if (var_to_display(p, &info->var, info))
1067                 return;
1068
1069         if (!info->fbcon_par)
1070                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1071
1072         /* If we are not the first console on this
1073            fb, copy the font from that console */
1074         t = &fb_display[fg_console];
1075         if (!p->fontdata) {
1076                 if (t->fontdata) {
1077                         struct vc_data *fvc = vc_cons[fg_console].d;
1078
1079                         vc->vc_font.data = (void *)(p->fontdata =
1080                                                     fvc->vc_font.data);
1081                         vc->vc_font.width = fvc->vc_font.width;
1082                         vc->vc_font.height = fvc->vc_font.height;
1083                         p->userfont = t->userfont;
1084
1085                         if (p->userfont)
1086                                 REFCOUNT(p->fontdata)++;
1087                 } else {
1088                         const struct font_desc *font = NULL;
1089
1090                         if (!fontname[0] || !(font = find_font(fontname)))
1091                                 font = get_default_font(info->var.xres,
1092                                                         info->var.yres,
1093                                                         info->pixmap.blit_x,
1094                                                         info->pixmap.blit_y);
1095                         vc->vc_font.width = font->width;
1096                         vc->vc_font.height = font->height;
1097                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1098                         vc->vc_font.charcount = 256; /* FIXME  Need to
1099                                                         support more fonts */
1100                 }
1101         }
1102
1103         if (p->userfont)
1104                 charcnt = FNTCHARCNT(p->fontdata);
1105
1106         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1107         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1108         if (charcnt == 256) {
1109                 vc->vc_hi_font_mask = 0;
1110         } else {
1111                 vc->vc_hi_font_mask = 0x100;
1112                 if (vc->vc_can_do_color)
1113                         vc->vc_complement_mask <<= 1;
1114         }
1115
1116         if (!*svc->vc_uni_pagedir_loc)
1117                 con_set_default_unimap(svc);
1118         if (!*vc->vc_uni_pagedir_loc)
1119                 con_copy_unimap(vc, svc);
1120
1121         ops = info->fbcon_par;
1122         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1123
1124         p->con_rotate = initial_rotation;
1125         if (p->con_rotate == -1)
1126                 p->con_rotate = info->fbcon_rotate_hint;
1127         if (p->con_rotate == -1)
1128                 p->con_rotate = FB_ROTATE_UR;
1129
1130         set_blitting_type(vc, info);
1131
1132         cols = vc->vc_cols;
1133         rows = vc->vc_rows;
1134         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1135         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1136         new_cols /= vc->vc_font.width;
1137         new_rows /= vc->vc_font.height;
1138
1139         /*
1140          * We must always set the mode. The mode of the previous console
1141          * driver could be in the same resolution but we are using different
1142          * hardware so we have to initialize the hardware.
1143          *
1144          * We need to do it in fbcon_init() to prevent screen corruption.
1145          */
1146         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1147                 if (info->fbops->fb_set_par &&
1148                     !(ops->flags & FBCON_FLAGS_INIT)) {
1149                         ret = info->fbops->fb_set_par(info);
1150
1151                         if (ret)
1152                                 printk(KERN_ERR "fbcon_init: detected "
1153                                         "unhandled fb_set_par error, "
1154                                         "error code %d\n", ret);
1155                 }
1156
1157                 ops->flags |= FBCON_FLAGS_INIT;
1158         }
1159
1160         ops->graphics = 0;
1161
1162         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1163             !(cap & FBINFO_HWACCEL_DISABLED))
1164                 p->scrollmode = SCROLL_MOVE;
1165         else /* default to something safe */
1166                 p->scrollmode = SCROLL_REDRAW;
1167
1168         /*
1169          *  ++guenther: console.c:vc_allocate() relies on initializing
1170          *  vc_{cols,rows}, but we must not set those if we are only
1171          *  resizing the console.
1172          */
1173         if (init) {
1174                 vc->vc_cols = new_cols;
1175                 vc->vc_rows = new_rows;
1176         } else
1177                 vc_resize(vc, new_cols, new_rows);
1178
1179         if (logo)
1180                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1181
1182         if (vc == svc && softback_buf)
1183                 fbcon_update_softback(vc);
1184
1185         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1186                 ops->rotate = FB_ROTATE_UR;
1187                 set_blitting_type(vc, info);
1188         }
1189
1190         ops->p = &fb_display[fg_console];
1191 }
1192
1193 static void fbcon_free_font(struct display *p, bool freefont)
1194 {
1195         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1196                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1197         p->fontdata = NULL;
1198         p->userfont = 0;
1199 }
1200
1201 static void set_vc_hi_font(struct vc_data *vc, bool set);
1202
1203 static void fbcon_deinit(struct vc_data *vc)
1204 {
1205         struct display *p = &fb_display[vc->vc_num];
1206         struct fb_info *info;
1207         struct fbcon_ops *ops;
1208         int idx;
1209         bool free_font = true;
1210
1211         idx = con2fb_map[vc->vc_num];
1212
1213         if (idx == -1)
1214                 goto finished;
1215
1216         info = registered_fb[idx];
1217
1218         if (!info)
1219                 goto finished;
1220
1221         if (info->flags & FBINFO_MISC_FIRMWARE)
1222                 free_font = false;
1223         ops = info->fbcon_par;
1224
1225         if (!ops)
1226                 goto finished;
1227
1228         if (con_is_visible(vc))
1229                 fbcon_del_cursor_timer(info);
1230
1231         ops->flags &= ~FBCON_FLAGS_INIT;
1232 finished:
1233
1234         fbcon_free_font(p, free_font);
1235         if (free_font)
1236                 vc->vc_font.data = NULL;
1237
1238         if (vc->vc_hi_font_mask)
1239                 set_vc_hi_font(vc, false);
1240
1241         if (!con_is_bound(&fb_con))
1242                 fbcon_exit();
1243
1244         return;
1245 }
1246
1247 /* ====================================================================== */
1248
1249 /*  fbcon_XXX routines - interface used by the world
1250  *
1251  *  This system is now divided into two levels because of complications
1252  *  caused by hardware scrolling. Top level functions:
1253  *
1254  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1255  *
1256  *  handles y values in range [0, scr_height-1] that correspond to real
1257  *  screen positions. y_wrap shift means that first line of bitmap may be
1258  *  anywhere on this display. These functions convert lineoffsets to
1259  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1260  *
1261  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1262  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1263  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1264  *
1265  *  WARNING:
1266  *
1267  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1268  *  Implies should only really hardware scroll in rows. Only reason for
1269  *  restriction is simplicity & efficiency at the moment.
1270  */
1271
1272 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1273                         int width)
1274 {
1275         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1276         struct fbcon_ops *ops = info->fbcon_par;
1277
1278         struct display *p = &fb_display[vc->vc_num];
1279         u_int y_break;
1280
1281         if (fbcon_is_inactive(vc, info))
1282                 return;
1283
1284         if (!height || !width)
1285                 return;
1286
1287         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1288                 vc->vc_top = 0;
1289                 /*
1290                  * If the font dimensions are not an integral of the display
1291                  * dimensions then the ops->clear below won't end up clearing
1292                  * the margins.  Call clear_margins here in case the logo
1293                  * bitmap stretched into the margin area.
1294                  */
1295                 fbcon_clear_margins(vc, 0);
1296         }
1297
1298         /* Split blits that cross physical y_wrap boundary */
1299
1300         y_break = p->vrows - p->yscroll;
1301         if (sy < y_break && sy + height - 1 >= y_break) {
1302                 u_int b = y_break - sy;
1303                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1304                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1305                                  width);
1306         } else
1307                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1308 }
1309
1310 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1311                         int count, int ypos, int xpos)
1312 {
1313         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1314         struct display *p = &fb_display[vc->vc_num];
1315         struct fbcon_ops *ops = info->fbcon_par;
1316
1317         if (!fbcon_is_inactive(vc, info))
1318                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1319                            get_color(vc, info, scr_readw(s), 1),
1320                            get_color(vc, info, scr_readw(s), 0));
1321 }
1322
1323 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1324 {
1325         unsigned short chr;
1326
1327         scr_writew(c, &chr);
1328         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1329 }
1330
1331 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1332 {
1333         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1334         struct fbcon_ops *ops = info->fbcon_par;
1335
1336         if (!fbcon_is_inactive(vc, info))
1337                 ops->clear_margins(vc, info, margin_color, bottom_only);
1338 }
1339
1340 static void fbcon_cursor(struct vc_data *vc, int mode)
1341 {
1342         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1343         struct fbcon_ops *ops = info->fbcon_par;
1344         int y;
1345         int c = scr_readw((u16 *) vc->vc_pos);
1346
1347         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1348
1349         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1350                 return;
1351
1352         if (vc->vc_cursor_type & 0x10)
1353                 fbcon_del_cursor_timer(info);
1354         else
1355                 fbcon_add_cursor_timer(info);
1356
1357         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1358         if (mode & CM_SOFTBACK) {
1359                 mode &= ~CM_SOFTBACK;
1360                 y = softback_lines;
1361         } else {
1362                 if (softback_lines)
1363                         fbcon_set_origin(vc);
1364                 y = 0;
1365         }
1366
1367         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1368                     get_color(vc, info, c, 0));
1369 }
1370
1371 static int scrollback_phys_max = 0;
1372 static int scrollback_max = 0;
1373 static int scrollback_current = 0;
1374
1375 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1376                            int unit)
1377 {
1378         struct display *p, *t;
1379         struct vc_data **default_mode, *vc;
1380         struct vc_data *svc;
1381         struct fbcon_ops *ops = info->fbcon_par;
1382         int rows, cols, charcnt = 256;
1383
1384         p = &fb_display[unit];
1385
1386         if (var_to_display(p, var, info))
1387                 return;
1388
1389         vc = vc_cons[unit].d;
1390
1391         if (!vc)
1392                 return;
1393
1394         default_mode = vc->vc_display_fg;
1395         svc = *default_mode;
1396         t = &fb_display[svc->vc_num];
1397
1398         if (!vc->vc_font.data) {
1399                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1400                 vc->vc_font.width = (*default_mode)->vc_font.width;
1401                 vc->vc_font.height = (*default_mode)->vc_font.height;
1402                 p->userfont = t->userfont;
1403                 if (p->userfont)
1404                         REFCOUNT(p->fontdata)++;
1405         }
1406         if (p->userfont)
1407                 charcnt = FNTCHARCNT(p->fontdata);
1408
1409         var->activate = FB_ACTIVATE_NOW;
1410         info->var.activate = var->activate;
1411         var->yoffset = info->var.yoffset;
1412         var->xoffset = info->var.xoffset;
1413         fb_set_var(info, var);
1414         ops->var = info->var;
1415         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1416         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1417         if (charcnt == 256) {
1418                 vc->vc_hi_font_mask = 0;
1419         } else {
1420                 vc->vc_hi_font_mask = 0x100;
1421                 if (vc->vc_can_do_color)
1422                         vc->vc_complement_mask <<= 1;
1423         }
1424
1425         if (!*svc->vc_uni_pagedir_loc)
1426                 con_set_default_unimap(svc);
1427         if (!*vc->vc_uni_pagedir_loc)
1428                 con_copy_unimap(vc, svc);
1429
1430         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1431         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1432         cols /= vc->vc_font.width;
1433         rows /= vc->vc_font.height;
1434         vc_resize(vc, cols, rows);
1435
1436         if (con_is_visible(vc)) {
1437                 update_screen(vc);
1438                 if (softback_buf)
1439                         fbcon_update_softback(vc);
1440         }
1441 }
1442
1443 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1444 {
1445         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1446         struct fbcon_ops *ops = info->fbcon_par;
1447         struct display *p = &fb_display[vc->vc_num];
1448
1449         p->yscroll += count;
1450         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1451                 p->yscroll -= p->vrows;
1452         ops->var.xoffset = 0;
1453         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1454         ops->var.vmode |= FB_VMODE_YWRAP;
1455         ops->update_start(info);
1456         scrollback_max += count;
1457         if (scrollback_max > scrollback_phys_max)
1458                 scrollback_max = scrollback_phys_max;
1459         scrollback_current = 0;
1460 }
1461
1462 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1463 {
1464         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1465         struct fbcon_ops *ops = info->fbcon_par;
1466         struct display *p = &fb_display[vc->vc_num];
1467
1468         p->yscroll -= count;
1469         if (p->yscroll < 0)     /* Deal with wrap */
1470                 p->yscroll += p->vrows;
1471         ops->var.xoffset = 0;
1472         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1473         ops->var.vmode |= FB_VMODE_YWRAP;
1474         ops->update_start(info);
1475         scrollback_max -= count;
1476         if (scrollback_max < 0)
1477                 scrollback_max = 0;
1478         scrollback_current = 0;
1479 }
1480
1481 static __inline__ void ypan_up(struct vc_data *vc, int count)
1482 {
1483         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1484         struct display *p = &fb_display[vc->vc_num];
1485         struct fbcon_ops *ops = info->fbcon_par;
1486
1487         p->yscroll += count;
1488         if (p->yscroll > p->vrows - vc->vc_rows) {
1489                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1490                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1491                 p->yscroll -= p->vrows - vc->vc_rows;
1492         }
1493
1494         ops->var.xoffset = 0;
1495         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1496         ops->var.vmode &= ~FB_VMODE_YWRAP;
1497         ops->update_start(info);
1498         fbcon_clear_margins(vc, 1);
1499         scrollback_max += count;
1500         if (scrollback_max > scrollback_phys_max)
1501                 scrollback_max = scrollback_phys_max;
1502         scrollback_current = 0;
1503 }
1504
1505 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1506 {
1507         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1508         struct fbcon_ops *ops = info->fbcon_par;
1509         struct display *p = &fb_display[vc->vc_num];
1510
1511         p->yscroll += count;
1512
1513         if (p->yscroll > p->vrows - vc->vc_rows) {
1514                 p->yscroll -= p->vrows - vc->vc_rows;
1515                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1516         }
1517
1518         ops->var.xoffset = 0;
1519         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1520         ops->var.vmode &= ~FB_VMODE_YWRAP;
1521         ops->update_start(info);
1522         fbcon_clear_margins(vc, 1);
1523         scrollback_max += count;
1524         if (scrollback_max > scrollback_phys_max)
1525                 scrollback_max = scrollback_phys_max;
1526         scrollback_current = 0;
1527 }
1528
1529 static __inline__ void ypan_down(struct vc_data *vc, int count)
1530 {
1531         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1532         struct display *p = &fb_display[vc->vc_num];
1533         struct fbcon_ops *ops = info->fbcon_par;
1534
1535         p->yscroll -= count;
1536         if (p->yscroll < 0) {
1537                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1538                             0, vc->vc_rows, vc->vc_cols);
1539                 p->yscroll += p->vrows - vc->vc_rows;
1540         }
1541
1542         ops->var.xoffset = 0;
1543         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1544         ops->var.vmode &= ~FB_VMODE_YWRAP;
1545         ops->update_start(info);
1546         fbcon_clear_margins(vc, 1);
1547         scrollback_max -= count;
1548         if (scrollback_max < 0)
1549                 scrollback_max = 0;
1550         scrollback_current = 0;
1551 }
1552
1553 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1554 {
1555         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1556         struct fbcon_ops *ops = info->fbcon_par;
1557         struct display *p = &fb_display[vc->vc_num];
1558
1559         p->yscroll -= count;
1560
1561         if (p->yscroll < 0) {
1562                 p->yscroll += p->vrows - vc->vc_rows;
1563                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1564         }
1565
1566         ops->var.xoffset = 0;
1567         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1568         ops->var.vmode &= ~FB_VMODE_YWRAP;
1569         ops->update_start(info);
1570         fbcon_clear_margins(vc, 1);
1571         scrollback_max -= count;
1572         if (scrollback_max < 0)
1573                 scrollback_max = 0;
1574         scrollback_current = 0;
1575 }
1576
1577 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1578                                   long delta)
1579 {
1580         int count = vc->vc_rows;
1581         unsigned short *d, *s;
1582         unsigned long n;
1583         int line = 0;
1584
1585         d = (u16 *) softback_curr;
1586         if (d == (u16 *) softback_in)
1587                 d = (u16 *) vc->vc_origin;
1588         n = softback_curr + delta * vc->vc_size_row;
1589         softback_lines -= delta;
1590         if (delta < 0) {
1591                 if (softback_curr < softback_top && n < softback_buf) {
1592                         n += softback_end - softback_buf;
1593                         if (n < softback_top) {
1594                                 softback_lines -=
1595                                     (softback_top - n) / vc->vc_size_row;
1596                                 n = softback_top;
1597                         }
1598                 } else if (softback_curr >= softback_top
1599                            && n < softback_top) {
1600                         softback_lines -=
1601                             (softback_top - n) / vc->vc_size_row;
1602                         n = softback_top;
1603                 }
1604         } else {
1605                 if (softback_curr > softback_in && n >= softback_end) {
1606                         n += softback_buf - softback_end;
1607                         if (n > softback_in) {
1608                                 n = softback_in;
1609                                 softback_lines = 0;
1610                         }
1611                 } else if (softback_curr <= softback_in && n > softback_in) {
1612                         n = softback_in;
1613                         softback_lines = 0;
1614                 }
1615         }
1616         if (n == softback_curr)
1617                 return;
1618         softback_curr = n;
1619         s = (u16 *) softback_curr;
1620         if (s == (u16 *) softback_in)
1621                 s = (u16 *) vc->vc_origin;
1622         while (count--) {
1623                 unsigned short *start;
1624                 unsigned short *le;
1625                 unsigned short c;
1626                 int x = 0;
1627                 unsigned short attr = 1;
1628
1629                 start = s;
1630                 le = advance_row(s, 1);
1631                 do {
1632                         c = scr_readw(s);
1633                         if (attr != (c & 0xff00)) {
1634                                 attr = c & 0xff00;
1635                                 if (s > start) {
1636                                         fbcon_putcs(vc, start, s - start,
1637                                                     line, x);
1638                                         x += s - start;
1639                                         start = s;
1640                                 }
1641                         }
1642                         if (c == scr_readw(d)) {
1643                                 if (s > start) {
1644                                         fbcon_putcs(vc, start, s - start,
1645                                                     line, x);
1646                                         x += s - start + 1;
1647                                         start = s + 1;
1648                                 } else {
1649                                         x++;
1650                                         start++;
1651                                 }
1652                         }
1653                         s++;
1654                         d++;
1655                 } while (s < le);
1656                 if (s > start)
1657                         fbcon_putcs(vc, start, s - start, line, x);
1658                 line++;
1659                 if (d == (u16 *) softback_end)
1660                         d = (u16 *) softback_buf;
1661                 if (d == (u16 *) softback_in)
1662                         d = (u16 *) vc->vc_origin;
1663                 if (s == (u16 *) softback_end)
1664                         s = (u16 *) softback_buf;
1665                 if (s == (u16 *) softback_in)
1666                         s = (u16 *) vc->vc_origin;
1667         }
1668 }
1669
1670 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1671                               int line, int count, int dy)
1672 {
1673         unsigned short *s = (unsigned short *)
1674                 (vc->vc_origin + vc->vc_size_row * line);
1675
1676         while (count--) {
1677                 unsigned short *start = s;
1678                 unsigned short *le = advance_row(s, 1);
1679                 unsigned short c;
1680                 int x = 0;
1681                 unsigned short attr = 1;
1682
1683                 do {
1684                         c = scr_readw(s);
1685                         if (attr != (c & 0xff00)) {
1686                                 attr = c & 0xff00;
1687                                 if (s > start) {
1688                                         fbcon_putcs(vc, start, s - start,
1689                                                     dy, x);
1690                                         x += s - start;
1691                                         start = s;
1692                                 }
1693                         }
1694                         console_conditional_schedule();
1695                         s++;
1696                 } while (s < le);
1697                 if (s > start)
1698                         fbcon_putcs(vc, start, s - start, dy, x);
1699                 console_conditional_schedule();
1700                 dy++;
1701         }
1702 }
1703
1704 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1705                         struct display *p, int line, int count, int ycount)
1706 {
1707         int offset = ycount * vc->vc_cols;
1708         unsigned short *d = (unsigned short *)
1709             (vc->vc_origin + vc->vc_size_row * line);
1710         unsigned short *s = d + offset;
1711         struct fbcon_ops *ops = info->fbcon_par;
1712
1713         while (count--) {
1714                 unsigned short *start = s;
1715                 unsigned short *le = advance_row(s, 1);
1716                 unsigned short c;
1717                 int x = 0;
1718
1719                 do {
1720                         c = scr_readw(s);
1721
1722                         if (c == scr_readw(d)) {
1723                                 if (s > start) {
1724                                         ops->bmove(vc, info, line + ycount, x,
1725                                                    line, x, 1, s-start);
1726                                         x += s - start + 1;
1727                                         start = s + 1;
1728                                 } else {
1729                                         x++;
1730                                         start++;
1731                                 }
1732                         }
1733
1734                         scr_writew(c, d);
1735                         console_conditional_schedule();
1736                         s++;
1737                         d++;
1738                 } while (s < le);
1739                 if (s > start)
1740                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1741                                    s-start);
1742                 console_conditional_schedule();
1743                 if (ycount > 0)
1744                         line++;
1745                 else {
1746                         line--;
1747                         /* NOTE: We subtract two lines from these pointers */
1748                         s -= vc->vc_size_row;
1749                         d -= vc->vc_size_row;
1750                 }
1751         }
1752 }
1753
1754 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1755                          int line, int count, int offset)
1756 {
1757         unsigned short *d = (unsigned short *)
1758             (vc->vc_origin + vc->vc_size_row * line);
1759         unsigned short *s = d + offset;
1760
1761         while (count--) {
1762                 unsigned short *start = s;
1763                 unsigned short *le = advance_row(s, 1);
1764                 unsigned short c;
1765                 int x = 0;
1766                 unsigned short attr = 1;
1767
1768                 do {
1769                         c = scr_readw(s);
1770                         if (attr != (c & 0xff00)) {
1771                                 attr = c & 0xff00;
1772                                 if (s > start) {
1773                                         fbcon_putcs(vc, start, s - start,
1774                                                     line, x);
1775                                         x += s - start;
1776                                         start = s;
1777                                 }
1778                         }
1779                         if (c == scr_readw(d)) {
1780                                 if (s > start) {
1781                                         fbcon_putcs(vc, start, s - start,
1782                                                      line, x);
1783                                         x += s - start + 1;
1784                                         start = s + 1;
1785                                 } else {
1786                                         x++;
1787                                         start++;
1788                                 }
1789                         }
1790                         scr_writew(c, d);
1791                         console_conditional_schedule();
1792                         s++;
1793                         d++;
1794                 } while (s < le);
1795                 if (s > start)
1796                         fbcon_putcs(vc, start, s - start, line, x);
1797                 console_conditional_schedule();
1798                 if (offset > 0)
1799                         line++;
1800                 else {
1801                         line--;
1802                         /* NOTE: We subtract two lines from these pointers */
1803                         s -= vc->vc_size_row;
1804                         d -= vc->vc_size_row;
1805                 }
1806         }
1807 }
1808
1809 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1810                                        int count)
1811 {
1812         unsigned short *p;
1813
1814         if (vc->vc_num != fg_console)
1815                 return;
1816         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1817
1818         while (count) {
1819                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1820                 count--;
1821                 p = advance_row(p, 1);
1822                 softback_in += vc->vc_size_row;
1823                 if (softback_in == softback_end)
1824                         softback_in = softback_buf;
1825                 if (softback_in == softback_top) {
1826                         softback_top += vc->vc_size_row;
1827                         if (softback_top == softback_end)
1828                                 softback_top = softback_buf;
1829                 }
1830         }
1831         softback_curr = softback_in;
1832 }
1833
1834 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1835                 enum con_scroll dir, unsigned int count)
1836 {
1837         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1838         struct display *p = &fb_display[vc->vc_num];
1839         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1840
1841         if (fbcon_is_inactive(vc, info))
1842                 return true;
1843
1844         fbcon_cursor(vc, CM_ERASE);
1845
1846         /*
1847          * ++Geert: Only use ywrap/ypan if the console is in text mode
1848          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1849          *           whole screen (prevents flicker).
1850          */
1851
1852         switch (dir) {
1853         case SM_UP:
1854                 if (count > vc->vc_rows)        /* Maximum realistic size */
1855                         count = vc->vc_rows;
1856                 if (softback_top)
1857                         fbcon_softback_note(vc, t, count);
1858                 if (logo_shown >= 0)
1859                         goto redraw_up;
1860                 switch (p->scrollmode) {
1861                 case SCROLL_MOVE:
1862                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1863                                      count);
1864                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1865                         scr_memsetw((unsigned short *) (vc->vc_origin +
1866                                                         vc->vc_size_row *
1867                                                         (b - count)),
1868                                     vc->vc_video_erase_char,
1869                                     vc->vc_size_row * count);
1870                         return true;
1871                         break;
1872
1873                 case SCROLL_WRAP_MOVE:
1874                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1875                                 if (t > 0)
1876                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1877                                                     vc->vc_cols);
1878                                 ywrap_up(vc, count);
1879                                 if (vc->vc_rows - b > 0)
1880                                         fbcon_bmove(vc, b - count, 0, b, 0,
1881                                                     vc->vc_rows - b,
1882                                                     vc->vc_cols);
1883                         } else if (info->flags & FBINFO_READS_FAST)
1884                                 fbcon_bmove(vc, t + count, 0, t, 0,
1885                                             b - t - count, vc->vc_cols);
1886                         else
1887                                 goto redraw_up;
1888                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1889                         break;
1890
1891                 case SCROLL_PAN_REDRAW:
1892                         if ((p->yscroll + count <=
1893                              2 * (p->vrows - vc->vc_rows))
1894                             && ((!scroll_partial && (b - t == vc->vc_rows))
1895                                 || (scroll_partial
1896                                     && (b - t - count >
1897                                         3 * vc->vc_rows >> 2)))) {
1898                                 if (t > 0)
1899                                         fbcon_redraw_move(vc, p, 0, t, count);
1900                                 ypan_up_redraw(vc, t, count);
1901                                 if (vc->vc_rows - b > 0)
1902                                         fbcon_redraw_move(vc, p, b,
1903                                                           vc->vc_rows - b, b);
1904                         } else
1905                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1906                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1907                         break;
1908
1909                 case SCROLL_PAN_MOVE:
1910                         if ((p->yscroll + count <=
1911                              2 * (p->vrows - vc->vc_rows))
1912                             && ((!scroll_partial && (b - t == vc->vc_rows))
1913                                 || (scroll_partial
1914                                     && (b - t - count >
1915                                         3 * vc->vc_rows >> 2)))) {
1916                                 if (t > 0)
1917                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1918                                                     vc->vc_cols);
1919                                 ypan_up(vc, count);
1920                                 if (vc->vc_rows - b > 0)
1921                                         fbcon_bmove(vc, b - count, 0, b, 0,
1922                                                     vc->vc_rows - b,
1923                                                     vc->vc_cols);
1924                         } else if (info->flags & FBINFO_READS_FAST)
1925                                 fbcon_bmove(vc, t + count, 0, t, 0,
1926                                             b - t - count, vc->vc_cols);
1927                         else
1928                                 goto redraw_up;
1929                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1930                         break;
1931
1932                 case SCROLL_REDRAW:
1933                       redraw_up:
1934                         fbcon_redraw(vc, p, t, b - t - count,
1935                                      count * vc->vc_cols);
1936                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1937                         scr_memsetw((unsigned short *) (vc->vc_origin +
1938                                                         vc->vc_size_row *
1939                                                         (b - count)),
1940                                     vc->vc_video_erase_char,
1941                                     vc->vc_size_row * count);
1942                         return true;
1943                 }
1944                 break;
1945
1946         case SM_DOWN:
1947                 if (count > vc->vc_rows)        /* Maximum realistic size */
1948                         count = vc->vc_rows;
1949                 if (logo_shown >= 0)
1950                         goto redraw_down;
1951                 switch (p->scrollmode) {
1952                 case SCROLL_MOVE:
1953                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1954                                      -count);
1955                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1956                         scr_memsetw((unsigned short *) (vc->vc_origin +
1957                                                         vc->vc_size_row *
1958                                                         t),
1959                                     vc->vc_video_erase_char,
1960                                     vc->vc_size_row * count);
1961                         return true;
1962                         break;
1963
1964                 case SCROLL_WRAP_MOVE:
1965                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1966                                 if (vc->vc_rows - b > 0)
1967                                         fbcon_bmove(vc, b, 0, b - count, 0,
1968                                                     vc->vc_rows - b,
1969                                                     vc->vc_cols);
1970                                 ywrap_down(vc, count);
1971                                 if (t > 0)
1972                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1973                                                     vc->vc_cols);
1974                         } else if (info->flags & FBINFO_READS_FAST)
1975                                 fbcon_bmove(vc, t, 0, t + count, 0,
1976                                             b - t - count, vc->vc_cols);
1977                         else
1978                                 goto redraw_down;
1979                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1980                         break;
1981
1982                 case SCROLL_PAN_MOVE:
1983                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1984                             && ((!scroll_partial && (b - t == vc->vc_rows))
1985                                 || (scroll_partial
1986                                     && (b - t - count >
1987                                         3 * vc->vc_rows >> 2)))) {
1988                                 if (vc->vc_rows - b > 0)
1989                                         fbcon_bmove(vc, b, 0, b - count, 0,
1990                                                     vc->vc_rows - b,
1991                                                     vc->vc_cols);
1992                                 ypan_down(vc, count);
1993                                 if (t > 0)
1994                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1995                                                     vc->vc_cols);
1996                         } else if (info->flags & FBINFO_READS_FAST)
1997                                 fbcon_bmove(vc, t, 0, t + count, 0,
1998                                             b - t - count, vc->vc_cols);
1999                         else
2000                                 goto redraw_down;
2001                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2002                         break;
2003
2004                 case SCROLL_PAN_REDRAW:
2005                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2006                             && ((!scroll_partial && (b - t == vc->vc_rows))
2007                                 || (scroll_partial
2008                                     && (b - t - count >
2009                                         3 * vc->vc_rows >> 2)))) {
2010                                 if (vc->vc_rows - b > 0)
2011                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2012                                                           b - count);
2013                                 ypan_down_redraw(vc, t, count);
2014                                 if (t > 0)
2015                                         fbcon_redraw_move(vc, p, count, t, 0);
2016                         } else
2017                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2018                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2019                         break;
2020
2021                 case SCROLL_REDRAW:
2022                       redraw_down:
2023                         fbcon_redraw(vc, p, b - 1, b - t - count,
2024                                      -count * vc->vc_cols);
2025                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2026                         scr_memsetw((unsigned short *) (vc->vc_origin +
2027                                                         vc->vc_size_row *
2028                                                         t),
2029                                     vc->vc_video_erase_char,
2030                                     vc->vc_size_row * count);
2031                         return true;
2032                 }
2033         }
2034         return false;
2035 }
2036
2037
2038 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2039                         int height, int width)
2040 {
2041         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2042         struct display *p = &fb_display[vc->vc_num];
2043
2044         if (fbcon_is_inactive(vc, info))
2045                 return;
2046
2047         if (!width || !height)
2048                 return;
2049
2050         /*  Split blits that cross physical y_wrap case.
2051          *  Pathological case involves 4 blits, better to use recursive
2052          *  code rather than unrolled case
2053          *
2054          *  Recursive invocations don't need to erase the cursor over and
2055          *  over again, so we use fbcon_bmove_rec()
2056          */
2057         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2058                         p->vrows - p->yscroll);
2059 }
2060
2061 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2062                             int dy, int dx, int height, int width, u_int y_break)
2063 {
2064         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2065         struct fbcon_ops *ops = info->fbcon_par;
2066         u_int b;
2067
2068         if (sy < y_break && sy + height > y_break) {
2069                 b = y_break - sy;
2070                 if (dy < sy) {  /* Avoid trashing self */
2071                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2072                                         y_break);
2073                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2074                                         height - b, width, y_break);
2075                 } else {
2076                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2077                                         height - b, width, y_break);
2078                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2079                                         y_break);
2080                 }
2081                 return;
2082         }
2083
2084         if (dy < y_break && dy + height > y_break) {
2085                 b = y_break - dy;
2086                 if (dy < sy) {  /* Avoid trashing self */
2087                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2088                                         y_break);
2089                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2090                                         height - b, width, y_break);
2091                 } else {
2092                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2093                                         height - b, width, y_break);
2094                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2095                                         y_break);
2096                 }
2097                 return;
2098         }
2099         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2100                    height, width);
2101 }
2102
2103 static void updatescrollmode(struct display *p,
2104                                         struct fb_info *info,
2105                                         struct vc_data *vc)
2106 {
2107         struct fbcon_ops *ops = info->fbcon_par;
2108         int fh = vc->vc_font.height;
2109         int cap = info->flags;
2110         u16 t = 0;
2111         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2112                                   info->fix.xpanstep);
2113         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2114         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2115         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2116                                    info->var.xres_virtual);
2117         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2118                 divides(ypan, vc->vc_font.height) && vyres > yres;
2119         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2120                 divides(ywrap, vc->vc_font.height) &&
2121                 divides(vc->vc_font.height, vyres) &&
2122                 divides(vc->vc_font.height, yres);
2123         int reading_fast = cap & FBINFO_READS_FAST;
2124         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2125                 !(cap & FBINFO_HWACCEL_DISABLED);
2126         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2127                 !(cap & FBINFO_HWACCEL_DISABLED);
2128
2129         p->vrows = vyres/fh;
2130         if (yres > (fh * (vc->vc_rows + 1)))
2131                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2132         if ((yres % fh) && (vyres % fh < yres % fh))
2133                 p->vrows--;
2134
2135         if (good_wrap || good_pan) {
2136                 if (reading_fast || fast_copyarea)
2137                         p->scrollmode = good_wrap ?
2138                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2139                 else
2140                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2141                                 SCROLL_PAN_REDRAW;
2142         } else {
2143                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2144                         p->scrollmode = SCROLL_MOVE;
2145                 else
2146                         p->scrollmode = SCROLL_REDRAW;
2147         }
2148 }
2149
2150 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2151                         unsigned int height, unsigned int user)
2152 {
2153         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2154         struct fbcon_ops *ops = info->fbcon_par;
2155         struct display *p = &fb_display[vc->vc_num];
2156         struct fb_var_screeninfo var = info->var;
2157         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2158
2159         virt_w = FBCON_SWAP(ops->rotate, width, height);
2160         virt_h = FBCON_SWAP(ops->rotate, height, width);
2161         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2162                                  vc->vc_font.height);
2163         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2164                                  vc->vc_font.width);
2165         var.xres = virt_w * virt_fw;
2166         var.yres = virt_h * virt_fh;
2167         x_diff = info->var.xres - var.xres;
2168         y_diff = info->var.yres - var.yres;
2169         if (x_diff < 0 || x_diff > virt_fw ||
2170             y_diff < 0 || y_diff > virt_fh) {
2171                 const struct fb_videomode *mode;
2172
2173                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2174                 mode = fb_find_best_mode(&var, &info->modelist);
2175                 if (mode == NULL)
2176                         return -EINVAL;
2177                 display_to_var(&var, p);
2178                 fb_videomode_to_var(&var, mode);
2179
2180                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2181                         return -EINVAL;
2182
2183                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2184                 if (con_is_visible(vc)) {
2185                         var.activate = FB_ACTIVATE_NOW |
2186                                 FB_ACTIVATE_FORCE;
2187                         fb_set_var(info, &var);
2188                 }
2189                 var_to_display(p, &info->var, info);
2190                 ops->var = info->var;
2191         }
2192         updatescrollmode(p, info, vc);
2193         return 0;
2194 }
2195
2196 static int fbcon_switch(struct vc_data *vc)
2197 {
2198         struct fb_info *info, *old_info = NULL;
2199         struct fbcon_ops *ops;
2200         struct display *p = &fb_display[vc->vc_num];
2201         struct fb_var_screeninfo var;
2202         int i, ret, prev_console, charcnt = 256;
2203
2204         info = registered_fb[con2fb_map[vc->vc_num]];
2205         ops = info->fbcon_par;
2206
2207         if (softback_top) {
2208                 if (softback_lines)
2209                         fbcon_set_origin(vc);
2210                 softback_top = softback_curr = softback_in = softback_buf;
2211                 softback_lines = 0;
2212                 fbcon_update_softback(vc);
2213         }
2214
2215         if (logo_shown >= 0) {
2216                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2217
2218                 if (conp2->vc_top == logo_lines
2219                     && conp2->vc_bottom == conp2->vc_rows)
2220                         conp2->vc_top = 0;
2221                 logo_shown = FBCON_LOGO_CANSHOW;
2222         }
2223
2224         prev_console = ops->currcon;
2225         if (prev_console != -1)
2226                 old_info = registered_fb[con2fb_map[prev_console]];
2227         /*
2228          * FIXME: If we have multiple fbdev's loaded, we need to
2229          * update all info->currcon.  Perhaps, we can place this
2230          * in a centralized structure, but this might break some
2231          * drivers.
2232          *
2233          * info->currcon = vc->vc_num;
2234          */
2235         for_each_registered_fb(i) {
2236                 if (registered_fb[i]->fbcon_par) {
2237                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2238
2239                         o->currcon = vc->vc_num;
2240                 }
2241         }
2242         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2243         display_to_var(&var, p);
2244         var.activate = FB_ACTIVATE_NOW;
2245
2246         /*
2247          * make sure we don't unnecessarily trip the memcmp()
2248          * in fb_set_var()
2249          */
2250         info->var.activate = var.activate;
2251         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2252         fb_set_var(info, &var);
2253         ops->var = info->var;
2254
2255         if (old_info != NULL && (old_info != info ||
2256                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2257                 if (info->fbops->fb_set_par) {
2258                         ret = info->fbops->fb_set_par(info);
2259
2260                         if (ret)
2261                                 printk(KERN_ERR "fbcon_switch: detected "
2262                                         "unhandled fb_set_par error, "
2263                                         "error code %d\n", ret);
2264                 }
2265
2266                 if (old_info != info)
2267                         fbcon_del_cursor_timer(old_info);
2268         }
2269
2270         if (fbcon_is_inactive(vc, info) ||
2271             ops->blank_state != FB_BLANK_UNBLANK)
2272                 fbcon_del_cursor_timer(info);
2273         else
2274                 fbcon_add_cursor_timer(info);
2275
2276         set_blitting_type(vc, info);
2277         ops->cursor_reset = 1;
2278
2279         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2280                 ops->rotate = FB_ROTATE_UR;
2281                 set_blitting_type(vc, info);
2282         }
2283
2284         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2285         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2286
2287         if (p->userfont)
2288                 charcnt = FNTCHARCNT(vc->vc_font.data);
2289
2290         if (charcnt > 256)
2291                 vc->vc_complement_mask <<= 1;
2292
2293         updatescrollmode(p, info, vc);
2294
2295         switch (p->scrollmode) {
2296         case SCROLL_WRAP_MOVE:
2297                 scrollback_phys_max = p->vrows - vc->vc_rows;
2298                 break;
2299         case SCROLL_PAN_MOVE:
2300         case SCROLL_PAN_REDRAW:
2301                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2302                 if (scrollback_phys_max < 0)
2303                         scrollback_phys_max = 0;
2304                 break;
2305         default:
2306                 scrollback_phys_max = 0;
2307                 break;
2308         }
2309
2310         scrollback_max = 0;
2311         scrollback_current = 0;
2312
2313         if (!fbcon_is_inactive(vc, info)) {
2314             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2315             ops->update_start(info);
2316         }
2317
2318         fbcon_set_palette(vc, color_table);
2319         fbcon_clear_margins(vc, 0);
2320
2321         if (logo_shown == FBCON_LOGO_DRAW) {
2322
2323                 logo_shown = fg_console;
2324                 /* This is protected above by initmem_freed */
2325                 fb_show_logo(info, ops->rotate);
2326                 update_region(vc,
2327                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2328                               vc->vc_size_row * (vc->vc_bottom -
2329                                                  vc->vc_top) / 2);
2330                 return 0;
2331         }
2332         return 1;
2333 }
2334
2335 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2336                                 int blank)
2337 {
2338         struct fb_event event;
2339
2340         if (blank) {
2341                 unsigned short charmask = vc->vc_hi_font_mask ?
2342                         0x1ff : 0xff;
2343                 unsigned short oldc;
2344
2345                 oldc = vc->vc_video_erase_char;
2346                 vc->vc_video_erase_char &= charmask;
2347                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2348                 vc->vc_video_erase_char = oldc;
2349         }
2350
2351
2352         if (!lock_fb_info(info))
2353                 return;
2354         event.info = info;
2355         event.data = &blank;
2356         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2357         unlock_fb_info(info);
2358 }
2359
2360 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2361 {
2362         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2363         struct fbcon_ops *ops = info->fbcon_par;
2364
2365         if (mode_switch) {
2366                 struct fb_var_screeninfo var = info->var;
2367
2368                 ops->graphics = 1;
2369
2370                 if (!blank) {
2371                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2372                         fb_set_var(info, &var);
2373                         ops->graphics = 0;
2374                         ops->var = info->var;
2375                 }
2376         }
2377
2378         if (!fbcon_is_inactive(vc, info)) {
2379                 if (ops->blank_state != blank) {
2380                         ops->blank_state = blank;
2381                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2382                         ops->cursor_flash = (!blank);
2383
2384                         if (!(info->flags & FBINFO_MISC_USEREVENT))
2385                                 if (fb_blank(info, blank))
2386                                         fbcon_generic_blank(vc, info, blank);
2387                 }
2388
2389                 if (!blank)
2390                         update_screen(vc);
2391         }
2392
2393         if (mode_switch || fbcon_is_inactive(vc, info) ||
2394             ops->blank_state != FB_BLANK_UNBLANK)
2395                 fbcon_del_cursor_timer(info);
2396         else
2397                 fbcon_add_cursor_timer(info);
2398
2399         return 0;
2400 }
2401
2402 static int fbcon_debug_enter(struct vc_data *vc)
2403 {
2404         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2405         struct fbcon_ops *ops = info->fbcon_par;
2406
2407         ops->save_graphics = ops->graphics;
2408         ops->graphics = 0;
2409         if (info->fbops->fb_debug_enter)
2410                 info->fbops->fb_debug_enter(info);
2411         fbcon_set_palette(vc, color_table);
2412         return 0;
2413 }
2414
2415 static int fbcon_debug_leave(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->graphics = ops->save_graphics;
2421         if (info->fbops->fb_debug_leave)
2422                 info->fbops->fb_debug_leave(info);
2423         return 0;
2424 }
2425
2426 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2427 {
2428         u8 *fontdata = vc->vc_font.data;
2429         u8 *data = font->data;
2430         int i, j;
2431
2432         font->width = vc->vc_font.width;
2433         font->height = vc->vc_font.height;
2434         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2435         if (!font->data)
2436                 return 0;
2437
2438         if (font->width <= 8) {
2439                 j = vc->vc_font.height;
2440                 for (i = 0; i < font->charcount; i++) {
2441                         memcpy(data, fontdata, j);
2442                         memset(data + j, 0, 32 - j);
2443                         data += 32;
2444                         fontdata += j;
2445                 }
2446         } else if (font->width <= 16) {
2447                 j = vc->vc_font.height * 2;
2448                 for (i = 0; i < font->charcount; i++) {
2449                         memcpy(data, fontdata, j);
2450                         memset(data + j, 0, 64 - j);
2451                         data += 64;
2452                         fontdata += j;
2453                 }
2454         } else if (font->width <= 24) {
2455                 for (i = 0; i < font->charcount; i++) {
2456                         for (j = 0; j < vc->vc_font.height; j++) {
2457                                 *data++ = fontdata[0];
2458                                 *data++ = fontdata[1];
2459                                 *data++ = fontdata[2];
2460                                 fontdata += sizeof(u32);
2461                         }
2462                         memset(data, 0, 3 * (32 - j));
2463                         data += 3 * (32 - j);
2464                 }
2465         } else {
2466                 j = vc->vc_font.height * 4;
2467                 for (i = 0; i < font->charcount; i++) {
2468                         memcpy(data, fontdata, j);
2469                         memset(data + j, 0, 128 - j);
2470                         data += 128;
2471                         fontdata += j;
2472                 }
2473         }
2474         return 0;
2475 }
2476
2477 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2478 static void set_vc_hi_font(struct vc_data *vc, bool set)
2479 {
2480         if (!set) {
2481                 vc->vc_hi_font_mask = 0;
2482                 if (vc->vc_can_do_color) {
2483                         vc->vc_complement_mask >>= 1;
2484                         vc->vc_s_complement_mask >>= 1;
2485                 }
2486
2487                 /* ++Edmund: reorder the attribute bits */
2488                 if (vc->vc_can_do_color) {
2489                         unsigned short *cp =
2490                             (unsigned short *) vc->vc_origin;
2491                         int count = vc->vc_screenbuf_size / 2;
2492                         unsigned short c;
2493                         for (; count > 0; count--, cp++) {
2494                                 c = scr_readw(cp);
2495                                 scr_writew(((c & 0xfe00) >> 1) |
2496                                            (c & 0xff), cp);
2497                         }
2498                         c = vc->vc_video_erase_char;
2499                         vc->vc_video_erase_char =
2500                             ((c & 0xfe00) >> 1) | (c & 0xff);
2501                         vc->vc_attr >>= 1;
2502                 }
2503         } else {
2504                 vc->vc_hi_font_mask = 0x100;
2505                 if (vc->vc_can_do_color) {
2506                         vc->vc_complement_mask <<= 1;
2507                         vc->vc_s_complement_mask <<= 1;
2508                 }
2509
2510                 /* ++Edmund: reorder the attribute bits */
2511                 {
2512                         unsigned short *cp =
2513                             (unsigned short *) vc->vc_origin;
2514                         int count = vc->vc_screenbuf_size / 2;
2515                         unsigned short c;
2516                         for (; count > 0; count--, cp++) {
2517                                 unsigned short newc;
2518                                 c = scr_readw(cp);
2519                                 if (vc->vc_can_do_color)
2520                                         newc =
2521                                             ((c & 0xff00) << 1) | (c &
2522                                                                    0xff);
2523                                 else
2524                                         newc = c & ~0x100;
2525                                 scr_writew(newc, cp);
2526                         }
2527                         c = vc->vc_video_erase_char;
2528                         if (vc->vc_can_do_color) {
2529                                 vc->vc_video_erase_char =
2530                                     ((c & 0xff00) << 1) | (c & 0xff);
2531                                 vc->vc_attr <<= 1;
2532                         } else
2533                                 vc->vc_video_erase_char = c & ~0x100;
2534                 }
2535         }
2536 }
2537
2538 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2539                              const u8 * data, int userfont)
2540 {
2541         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2542         struct fbcon_ops *ops = info->fbcon_par;
2543         struct display *p = &fb_display[vc->vc_num];
2544         int resize;
2545         int cnt;
2546         char *old_data = NULL;
2547
2548         if (con_is_visible(vc) && softback_lines)
2549                 fbcon_set_origin(vc);
2550
2551         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2552         if (p->userfont)
2553                 old_data = vc->vc_font.data;
2554         if (userfont)
2555                 cnt = FNTCHARCNT(data);
2556         else
2557                 cnt = 256;
2558         vc->vc_font.data = (void *)(p->fontdata = data);
2559         if ((p->userfont = userfont))
2560                 REFCOUNT(data)++;
2561         vc->vc_font.width = w;
2562         vc->vc_font.height = h;
2563         if (vc->vc_hi_font_mask && cnt == 256)
2564                 set_vc_hi_font(vc, false);
2565         else if (!vc->vc_hi_font_mask && cnt == 512)
2566                 set_vc_hi_font(vc, true);
2567
2568         if (resize) {
2569                 int cols, rows;
2570
2571                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2572                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2573                 cols /= w;
2574                 rows /= h;
2575                 vc_resize(vc, cols, rows);
2576                 if (con_is_visible(vc) && softback_buf)
2577                         fbcon_update_softback(vc);
2578         } else if (con_is_visible(vc)
2579                    && vc->vc_mode == KD_TEXT) {
2580                 fbcon_clear_margins(vc, 0);
2581                 update_screen(vc);
2582         }
2583
2584         if (old_data && (--REFCOUNT(old_data) == 0))
2585                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2586         return 0;
2587 }
2588
2589 static int fbcon_copy_font(struct vc_data *vc, int con)
2590 {
2591         struct display *od = &fb_display[con];
2592         struct console_font *f = &vc->vc_font;
2593
2594         if (od->fontdata == f->data)
2595                 return 0;       /* already the same font... */
2596         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2597 }
2598
2599 /*
2600  *  User asked to set font; we are guaranteed that
2601  *      a) width and height are in range 1..32
2602  *      b) charcount does not exceed 512
2603  *  but lets not assume that, since someone might someday want to use larger
2604  *  fonts. And charcount of 512 is small for unicode support.
2605  *
2606  *  However, user space gives the font in 32 rows , regardless of
2607  *  actual font height. So a new API is needed if support for larger fonts
2608  *  is ever implemented.
2609  */
2610
2611 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2612                           unsigned int flags)
2613 {
2614         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2615         unsigned charcount = font->charcount;
2616         int w = font->width;
2617         int h = font->height;
2618         int size;
2619         int i, csum;
2620         u8 *new_data, *data = font->data;
2621         int pitch = (font->width+7) >> 3;
2622
2623         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2624          * If not this check should be changed to charcount < 256 */
2625         if (charcount != 256 && charcount != 512)
2626                 return -EINVAL;
2627
2628         /* Make sure drawing engine can handle the font */
2629         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2630             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2631                 return -EINVAL;
2632
2633         /* Make sure driver can handle the font length */
2634         if (fbcon_invalid_charcount(info, charcount))
2635                 return -EINVAL;
2636
2637         size = h * pitch * charcount;
2638
2639         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2640
2641         if (!new_data)
2642                 return -ENOMEM;
2643
2644         new_data += FONT_EXTRA_WORDS * sizeof(int);
2645         FNTSIZE(new_data) = size;
2646         FNTCHARCNT(new_data) = charcount;
2647         REFCOUNT(new_data) = 0; /* usage counter */
2648         for (i=0; i< charcount; i++) {
2649                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2650         }
2651
2652         /* Since linux has a nice crc32 function use it for counting font
2653          * checksums. */
2654         csum = crc32(0, new_data, size);
2655
2656         FNTSUM(new_data) = csum;
2657         /* Check if the same font is on some other console already */
2658         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2659                 struct vc_data *tmp = vc_cons[i].d;
2660
2661                 if (fb_display[i].userfont &&
2662                     fb_display[i].fontdata &&
2663                     FNTSUM(fb_display[i].fontdata) == csum &&
2664                     FNTSIZE(fb_display[i].fontdata) == size &&
2665                     tmp->vc_font.width == w &&
2666                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2667                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2668                         new_data = (u8 *)fb_display[i].fontdata;
2669                         break;
2670                 }
2671         }
2672         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2673 }
2674
2675 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2676 {
2677         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2678         const struct font_desc *f;
2679
2680         if (!name)
2681                 f = get_default_font(info->var.xres, info->var.yres,
2682                                      info->pixmap.blit_x, info->pixmap.blit_y);
2683         else if (!(f = find_font(name)))
2684                 return -ENOENT;
2685
2686         font->width = f->width;
2687         font->height = f->height;
2688         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2689 }
2690
2691 static u16 palette_red[16];
2692 static u16 palette_green[16];
2693 static u16 palette_blue[16];
2694
2695 static struct fb_cmap palette_cmap = {
2696         0, 16, palette_red, palette_green, palette_blue, NULL
2697 };
2698
2699 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2700 {
2701         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2702         int i, j, k, depth;
2703         u8 val;
2704
2705         if (fbcon_is_inactive(vc, info))
2706                 return;
2707
2708         if (!con_is_visible(vc))
2709                 return;
2710
2711         depth = fb_get_color_depth(&info->var, &info->fix);
2712         if (depth > 3) {
2713                 for (i = j = 0; i < 16; i++) {
2714                         k = table[i];
2715                         val = vc->vc_palette[j++];
2716                         palette_red[k] = (val << 8) | val;
2717                         val = vc->vc_palette[j++];
2718                         palette_green[k] = (val << 8) | val;
2719                         val = vc->vc_palette[j++];
2720                         palette_blue[k] = (val << 8) | val;
2721                 }
2722                 palette_cmap.len = 16;
2723                 palette_cmap.start = 0;
2724         /*
2725          * If framebuffer is capable of less than 16 colors,
2726          * use default palette of fbcon.
2727          */
2728         } else
2729                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2730
2731         fb_set_cmap(&palette_cmap, info);
2732 }
2733
2734 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2735 {
2736         unsigned long p;
2737         int line;
2738
2739         if (vc->vc_num != fg_console || !softback_lines)
2740                 return (u16 *) (vc->vc_origin + offset);
2741         line = offset / vc->vc_size_row;
2742         if (line >= softback_lines)
2743                 return (u16 *) (vc->vc_origin + offset -
2744                                 softback_lines * vc->vc_size_row);
2745         p = softback_curr + offset;
2746         if (p >= softback_end)
2747                 p += softback_buf - softback_end;
2748         return (u16 *) p;
2749 }
2750
2751 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2752                                  int *px, int *py)
2753 {
2754         unsigned long ret;
2755         int x, y;
2756
2757         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2758                 unsigned long offset = (pos - vc->vc_origin) / 2;
2759
2760                 x = offset % vc->vc_cols;
2761                 y = offset / vc->vc_cols;
2762                 if (vc->vc_num == fg_console)
2763                         y += softback_lines;
2764                 ret = pos + (vc->vc_cols - x) * 2;
2765         } else if (vc->vc_num == fg_console && softback_lines) {
2766                 unsigned long offset = pos - softback_curr;
2767
2768                 if (pos < softback_curr)
2769                         offset += softback_end - softback_buf;
2770                 offset /= 2;
2771                 x = offset % vc->vc_cols;
2772                 y = offset / vc->vc_cols;
2773                 ret = pos + (vc->vc_cols - x) * 2;
2774                 if (ret == softback_end)
2775                         ret = softback_buf;
2776                 if (ret == softback_in)
2777                         ret = vc->vc_origin;
2778         } else {
2779                 /* Should not happen */
2780                 x = y = 0;
2781                 ret = vc->vc_origin;
2782         }
2783         if (px)
2784                 *px = x;
2785         if (py)
2786                 *py = y;
2787         return ret;
2788 }
2789
2790 /* As we might be inside of softback, we may work with non-contiguous buffer,
2791    that's why we have to use a separate routine. */
2792 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2793 {
2794         while (cnt--) {
2795                 u16 a = scr_readw(p);
2796                 if (!vc->vc_can_do_color)
2797                         a ^= 0x0800;
2798                 else if (vc->vc_hi_font_mask == 0x100)
2799                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2800                             (((a) & 0x0e00) << 4);
2801                 else
2802                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2803                             (((a) & 0x0700) << 4);
2804                 scr_writew(a, p++);
2805                 if (p == (u16 *) softback_end)
2806                         p = (u16 *) softback_buf;
2807                 if (p == (u16 *) softback_in)
2808                         p = (u16 *) vc->vc_origin;
2809         }
2810 }
2811
2812 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2813 {
2814         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2815         struct fbcon_ops *ops = info->fbcon_par;
2816         struct display *disp = &fb_display[fg_console];
2817         int offset, limit, scrollback_old;
2818
2819         if (softback_top) {
2820                 if (vc->vc_num != fg_console)
2821                         return;
2822                 if (vc->vc_mode != KD_TEXT || !lines)
2823                         return;
2824                 if (logo_shown >= 0) {
2825                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2826
2827                         if (conp2->vc_top == logo_lines
2828                             && conp2->vc_bottom == conp2->vc_rows)
2829                                 conp2->vc_top = 0;
2830                         if (logo_shown == vc->vc_num) {
2831                                 unsigned long p, q;
2832                                 int i;
2833
2834                                 p = softback_in;
2835                                 q = vc->vc_origin +
2836                                     logo_lines * vc->vc_size_row;
2837                                 for (i = 0; i < logo_lines; i++) {
2838                                         if (p == softback_top)
2839                                                 break;
2840                                         if (p == softback_buf)
2841                                                 p = softback_end;
2842                                         p -= vc->vc_size_row;
2843                                         q -= vc->vc_size_row;
2844                                         scr_memcpyw((u16 *) q, (u16 *) p,
2845                                                     vc->vc_size_row);
2846                                 }
2847                                 softback_in = softback_curr = p;
2848                                 update_region(vc, vc->vc_origin,
2849                                               logo_lines * vc->vc_cols);
2850                         }
2851                         logo_shown = FBCON_LOGO_CANSHOW;
2852                 }
2853                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2854                 fbcon_redraw_softback(vc, disp, lines);
2855                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2856                 return;
2857         }
2858
2859         if (!scrollback_phys_max)
2860                 return;
2861
2862         scrollback_old = scrollback_current;
2863         scrollback_current -= lines;
2864         if (scrollback_current < 0)
2865                 scrollback_current = 0;
2866         else if (scrollback_current > scrollback_max)
2867                 scrollback_current = scrollback_max;
2868         if (scrollback_current == scrollback_old)
2869                 return;
2870
2871         if (fbcon_is_inactive(vc, info))
2872                 return;
2873
2874         fbcon_cursor(vc, CM_ERASE);
2875
2876         offset = disp->yscroll - scrollback_current;
2877         limit = disp->vrows;
2878         switch (disp->scrollmode) {
2879         case SCROLL_WRAP_MOVE:
2880                 info->var.vmode |= FB_VMODE_YWRAP;
2881                 break;
2882         case SCROLL_PAN_MOVE:
2883         case SCROLL_PAN_REDRAW:
2884                 limit -= vc->vc_rows;
2885                 info->var.vmode &= ~FB_VMODE_YWRAP;
2886                 break;
2887         }
2888         if (offset < 0)
2889                 offset += limit;
2890         else if (offset >= limit)
2891                 offset -= limit;
2892
2893         ops->var.xoffset = 0;
2894         ops->var.yoffset = offset * vc->vc_font.height;
2895         ops->update_start(info);
2896
2897         if (!scrollback_current)
2898                 fbcon_cursor(vc, CM_DRAW);
2899 }
2900
2901 static int fbcon_set_origin(struct vc_data *vc)
2902 {
2903         if (softback_lines)
2904                 fbcon_scrolldelta(vc, softback_lines);
2905         return 0;
2906 }
2907
2908 static void fbcon_suspended(struct fb_info *info)
2909 {
2910         struct vc_data *vc = NULL;
2911         struct fbcon_ops *ops = info->fbcon_par;
2912
2913         if (!ops || ops->currcon < 0)
2914                 return;
2915         vc = vc_cons[ops->currcon].d;
2916
2917         /* Clear cursor, restore saved data */
2918         fbcon_cursor(vc, CM_ERASE);
2919 }
2920
2921 static void fbcon_resumed(struct fb_info *info)
2922 {
2923         struct vc_data *vc;
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         update_screen(vc);
2931 }
2932
2933 static void fbcon_modechanged(struct fb_info *info)
2934 {
2935         struct fbcon_ops *ops = info->fbcon_par;
2936         struct vc_data *vc;
2937         struct display *p;
2938         int rows, cols;
2939
2940         if (!ops || ops->currcon < 0)
2941                 return;
2942         vc = vc_cons[ops->currcon].d;
2943         if (vc->vc_mode != KD_TEXT ||
2944             registered_fb[con2fb_map[ops->currcon]] != info)
2945                 return;
2946
2947         p = &fb_display[vc->vc_num];
2948         set_blitting_type(vc, info);
2949
2950         if (con_is_visible(vc)) {
2951                 var_to_display(p, &info->var, info);
2952                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2953                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2954                 cols /= vc->vc_font.width;
2955                 rows /= vc->vc_font.height;
2956                 vc_resize(vc, cols, rows);
2957                 updatescrollmode(p, info, vc);
2958                 scrollback_max = 0;
2959                 scrollback_current = 0;
2960
2961                 if (!fbcon_is_inactive(vc, info)) {
2962                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2963                     ops->update_start(info);
2964                 }
2965
2966                 fbcon_set_palette(vc, color_table);
2967                 update_screen(vc);
2968                 if (softback_buf)
2969                         fbcon_update_softback(vc);
2970         }
2971 }
2972
2973 static void fbcon_set_all_vcs(struct fb_info *info)
2974 {
2975         struct fbcon_ops *ops = info->fbcon_par;
2976         struct vc_data *vc;
2977         struct display *p;
2978         int i, rows, cols, fg = -1;
2979
2980         if (!ops || ops->currcon < 0)
2981                 return;
2982
2983         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2984                 vc = vc_cons[i].d;
2985                 if (!vc || vc->vc_mode != KD_TEXT ||
2986                     registered_fb[con2fb_map[i]] != info)
2987                         continue;
2988
2989                 if (con_is_visible(vc)) {
2990                         fg = i;
2991                         continue;
2992                 }
2993
2994                 p = &fb_display[vc->vc_num];
2995                 set_blitting_type(vc, info);
2996                 var_to_display(p, &info->var, info);
2997                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2998                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2999                 cols /= vc->vc_font.width;
3000                 rows /= vc->vc_font.height;
3001                 vc_resize(vc, cols, rows);
3002         }
3003
3004         if (fg != -1)
3005                 fbcon_modechanged(info);
3006 }
3007
3008 static int fbcon_mode_deleted(struct fb_info *info,
3009                               struct fb_videomode *mode)
3010 {
3011         struct fb_info *fb_info;
3012         struct display *p;
3013         int i, j, found = 0;
3014
3015         /* before deletion, ensure that mode is not in use */
3016         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3017                 j = con2fb_map[i];
3018                 if (j == -1)
3019                         continue;
3020                 fb_info = registered_fb[j];
3021                 if (fb_info != info)
3022                         continue;
3023                 p = &fb_display[i];
3024                 if (!p || !p->mode)
3025                         continue;
3026                 if (fb_mode_is_equal(p->mode, mode)) {
3027                         found = 1;
3028                         break;
3029                 }
3030         }
3031         return found;
3032 }
3033
3034 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3035 static int fbcon_unbind(void)
3036 {
3037         int ret;
3038
3039         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3040                                 fbcon_is_default);
3041
3042         if (!ret)
3043                 fbcon_has_console_bind = 0;
3044
3045         return ret;
3046 }
3047 #else
3048 static inline int fbcon_unbind(void)
3049 {
3050         return -EINVAL;
3051 }
3052 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3053
3054 /* called with console_lock held */
3055 static int fbcon_fb_unbind(int idx)
3056 {
3057         int i, new_idx = -1, ret = 0;
3058
3059         WARN_CONSOLE_UNLOCKED();
3060
3061         if (!fbcon_has_console_bind)
3062                 return 0;
3063
3064         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3065                 if (con2fb_map[i] != idx &&
3066                     con2fb_map[i] != -1) {
3067                         new_idx = i;
3068                         break;
3069                 }
3070         }
3071
3072         if (new_idx != -1) {
3073                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3074                         if (con2fb_map[i] == idx)
3075                                 set_con2fb_map(i, new_idx, 0);
3076                 }
3077         } else {
3078                 struct fb_info *info = registered_fb[idx];
3079
3080                 /* This is sort of like set_con2fb_map, except it maps
3081                  * the consoles to no device and then releases the
3082                  * oldinfo to free memory and cancel the cursor blink
3083                  * timer. I can imagine this just becoming part of
3084                  * set_con2fb_map where new_idx is -1
3085                  */
3086                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3087                         if (con2fb_map[i] == idx) {
3088                                 con2fb_map[i] = -1;
3089                                 if (!search_fb_in_map(idx)) {
3090                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3091                                                                      info, NULL, i,
3092                                                                      idx, 0);
3093                                         if (ret) {
3094                                                 con2fb_map[i] = idx;
3095                                                 return ret;
3096                                         }
3097                                 }
3098                         }
3099                 }
3100                 ret = fbcon_unbind();
3101         }
3102
3103         return ret;
3104 }
3105
3106 /* called with console_lock held */
3107 static int fbcon_fb_unregistered(struct fb_info *info)
3108 {
3109         int i, idx;
3110
3111         WARN_CONSOLE_UNLOCKED();
3112
3113         if (deferred_takeover)
3114                 return 0;
3115
3116         idx = info->node;
3117         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3118                 if (con2fb_map[i] == idx)
3119                         con2fb_map[i] = -1;
3120         }
3121
3122         if (idx == info_idx) {
3123                 info_idx = -1;
3124
3125                 for_each_registered_fb(i) {
3126                         info_idx = i;
3127                         break;
3128                 }
3129         }
3130
3131         if (info_idx != -1) {
3132                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3133                         if (con2fb_map[i] == -1)
3134                                 con2fb_map[i] = info_idx;
3135                 }
3136         }
3137
3138         if (primary_device == idx)
3139                 primary_device = -1;
3140
3141         if (!num_registered_fb)
3142                 do_unregister_con_driver(&fb_con);
3143
3144         return 0;
3145 }
3146
3147 /* called with console_lock held */
3148 static void fbcon_remap_all(int idx)
3149 {
3150         int i;
3151
3152         WARN_CONSOLE_UNLOCKED();
3153
3154         if (deferred_takeover) {
3155                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3156                         con2fb_map_boot[i] = idx;
3157                 fbcon_map_override();
3158                 return;
3159         }
3160
3161         for (i = first_fb_vc; i <= last_fb_vc; i++)
3162                 set_con2fb_map(i, idx, 0);
3163
3164         if (con_is_bound(&fb_con)) {
3165                 printk(KERN_INFO "fbcon: Remapping primary device, "
3166                        "fb%i, to tty %i-%i\n", idx,
3167                        first_fb_vc + 1, last_fb_vc + 1);
3168                 info_idx = idx;
3169         }
3170 }
3171
3172 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3173 static void fbcon_select_primary(struct fb_info *info)
3174 {
3175         if (!map_override && primary_device == -1 &&
3176             fb_is_primary_device(info)) {
3177                 int i;
3178
3179                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3180                        info->fix.id, info->node);
3181                 primary_device = info->node;
3182
3183                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3184                         con2fb_map_boot[i] = primary_device;
3185
3186                 if (con_is_bound(&fb_con)) {
3187                         printk(KERN_INFO "fbcon: Remapping primary device, "
3188                                "fb%i, to tty %i-%i\n", info->node,
3189                                first_fb_vc + 1, last_fb_vc + 1);
3190                         info_idx = primary_device;
3191                 }
3192         }
3193
3194 }
3195 #else
3196 static inline void fbcon_select_primary(struct fb_info *info)
3197 {
3198         return;
3199 }
3200 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3201
3202 /* called with console_lock held */
3203 static int fbcon_fb_registered(struct fb_info *info)
3204 {
3205         int ret = 0, i, idx;
3206
3207         WARN_CONSOLE_UNLOCKED();
3208
3209         idx = info->node;
3210         fbcon_select_primary(info);
3211
3212         if (deferred_takeover) {
3213                 pr_info("fbcon: Deferring console take-over\n");
3214                 return 0;
3215         }
3216
3217         if (info_idx == -1) {
3218                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3219                         if (con2fb_map_boot[i] == idx) {
3220                                 info_idx = idx;
3221                                 break;
3222                         }
3223                 }
3224
3225                 if (info_idx != -1)
3226                         ret = do_fbcon_takeover(1);
3227         } else {
3228                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3229                         if (con2fb_map_boot[i] == idx)
3230                                 set_con2fb_map(i, idx, 0);
3231                 }
3232         }
3233
3234         return ret;
3235 }
3236
3237 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3238 {
3239         struct fbcon_ops *ops = info->fbcon_par;
3240         struct vc_data *vc;
3241
3242         if (!ops || ops->currcon < 0)
3243                 return;
3244
3245         vc = vc_cons[ops->currcon].d;
3246         if (vc->vc_mode != KD_TEXT ||
3247                         registered_fb[con2fb_map[ops->currcon]] != info)
3248                 return;
3249
3250         if (con_is_visible(vc)) {
3251                 if (blank)
3252                         do_blank_screen(0);
3253                 else
3254                         do_unblank_screen(0);
3255         }
3256         ops->blank_state = blank;
3257 }
3258
3259 static void fbcon_new_modelist(struct fb_info *info)
3260 {
3261         int i;
3262         struct vc_data *vc;
3263         struct fb_var_screeninfo var;
3264         const struct fb_videomode *mode;
3265
3266         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3267                 if (registered_fb[con2fb_map[i]] != info)
3268                         continue;
3269                 if (!fb_display[i].mode)
3270                         continue;
3271                 vc = vc_cons[i].d;
3272                 display_to_var(&var, &fb_display[i]);
3273                 mode = fb_find_nearest_mode(fb_display[i].mode,
3274                                             &info->modelist);
3275                 fb_videomode_to_var(&var, mode);
3276                 fbcon_set_disp(info, &var, vc->vc_num);
3277         }
3278 }
3279
3280 static void fbcon_get_requirement(struct fb_info *info,
3281                                   struct fb_blit_caps *caps)
3282 {
3283         struct vc_data *vc;
3284         struct display *p;
3285
3286         if (caps->flags) {
3287                 int i, charcnt;
3288
3289                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3290                         vc = vc_cons[i].d;
3291                         if (vc && vc->vc_mode == KD_TEXT &&
3292                             info->node == con2fb_map[i]) {
3293                                 p = &fb_display[i];
3294                                 caps->x |= 1 << (vc->vc_font.width - 1);
3295                                 caps->y |= 1 << (vc->vc_font.height - 1);
3296                                 charcnt = (p->userfont) ?
3297                                         FNTCHARCNT(p->fontdata) : 256;
3298                                 if (caps->len < charcnt)
3299                                         caps->len = charcnt;
3300                         }
3301                 }
3302         } else {
3303                 vc = vc_cons[fg_console].d;
3304
3305                 if (vc && vc->vc_mode == KD_TEXT &&
3306                     info->node == con2fb_map[fg_console]) {
3307                         p = &fb_display[fg_console];
3308                         caps->x = 1 << (vc->vc_font.width - 1);
3309                         caps->y = 1 << (vc->vc_font.height - 1);
3310                         caps->len = (p->userfont) ?
3311                                 FNTCHARCNT(p->fontdata) : 256;
3312                 }
3313         }
3314 }
3315
3316 static int fbcon_event_notify(struct notifier_block *self,
3317                               unsigned long action, void *data)
3318 {
3319         struct fb_event *event = data;
3320         struct fb_info *info = event->info;
3321         struct fb_videomode *mode;
3322         struct fb_con2fbmap *con2fb;
3323         struct fb_blit_caps *caps;
3324         int idx, ret = 0;
3325
3326         /*
3327          * ignore all events except driver registration and deregistration
3328          * if fbcon is not active
3329          */
3330         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3331                                   action == FB_EVENT_FB_UNREGISTERED))
3332                 goto done;
3333
3334         switch(action) {
3335         case FB_EVENT_SUSPEND:
3336                 fbcon_suspended(info);
3337                 break;
3338         case FB_EVENT_RESUME:
3339                 fbcon_resumed(info);
3340                 break;
3341         case FB_EVENT_MODE_CHANGE:
3342                 fbcon_modechanged(info);
3343                 break;
3344         case FB_EVENT_MODE_CHANGE_ALL:
3345                 fbcon_set_all_vcs(info);
3346                 break;
3347         case FB_EVENT_MODE_DELETE:
3348                 mode = event->data;
3349                 ret = fbcon_mode_deleted(info, mode);
3350                 break;
3351         case FB_EVENT_FB_UNBIND:
3352                 idx = info->node;
3353                 ret = fbcon_fb_unbind(idx);
3354                 break;
3355         case FB_EVENT_FB_REGISTERED:
3356                 ret = fbcon_fb_registered(info);
3357                 break;
3358         case FB_EVENT_FB_UNREGISTERED:
3359                 ret = fbcon_fb_unregistered(info);
3360                 break;
3361         case FB_EVENT_SET_CONSOLE_MAP:
3362                 /* called with console lock held */
3363                 con2fb = event->data;
3364                 ret = set_con2fb_map(con2fb->console - 1,
3365                                      con2fb->framebuffer, 1);
3366                 break;
3367         case FB_EVENT_GET_CONSOLE_MAP:
3368                 con2fb = event->data;
3369                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3370                 break;
3371         case FB_EVENT_BLANK:
3372                 fbcon_fb_blanked(info, *(int *)event->data);
3373                 break;
3374         case FB_EVENT_NEW_MODELIST:
3375                 fbcon_new_modelist(info);
3376                 break;
3377         case FB_EVENT_GET_REQ:
3378                 caps = event->data;
3379                 fbcon_get_requirement(info, caps);
3380                 break;
3381         case FB_EVENT_REMAP_ALL_CONSOLE:
3382                 idx = info->node;
3383                 fbcon_remap_all(idx);
3384                 break;
3385         }
3386 done:
3387         return ret;
3388 }
3389
3390 /*
3391  *  The console `switch' structure for the frame buffer based console
3392  */
3393
3394 static const struct consw fb_con = {
3395         .owner                  = THIS_MODULE,
3396         .con_startup            = fbcon_startup,
3397         .con_init               = fbcon_init,
3398         .con_deinit             = fbcon_deinit,
3399         .con_clear              = fbcon_clear,
3400         .con_putc               = fbcon_putc,
3401         .con_putcs              = fbcon_putcs,
3402         .con_cursor             = fbcon_cursor,
3403         .con_scroll             = fbcon_scroll,
3404         .con_switch             = fbcon_switch,
3405         .con_blank              = fbcon_blank,
3406         .con_font_set           = fbcon_set_font,
3407         .con_font_get           = fbcon_get_font,
3408         .con_font_default       = fbcon_set_def_font,
3409         .con_font_copy          = fbcon_copy_font,
3410         .con_set_palette        = fbcon_set_palette,
3411         .con_scrolldelta        = fbcon_scrolldelta,
3412         .con_set_origin         = fbcon_set_origin,
3413         .con_invert_region      = fbcon_invert_region,
3414         .con_screen_pos         = fbcon_screen_pos,
3415         .con_getxy              = fbcon_getxy,
3416         .con_resize             = fbcon_resize,
3417         .con_debug_enter        = fbcon_debug_enter,
3418         .con_debug_leave        = fbcon_debug_leave,
3419 };
3420
3421 static struct notifier_block fbcon_event_notifier = {
3422         .notifier_call  = fbcon_event_notify,
3423 };
3424
3425 static ssize_t store_rotate(struct device *device,
3426                             struct device_attribute *attr, const char *buf,
3427                             size_t count)
3428 {
3429         struct fb_info *info;
3430         int rotate, idx;
3431         char **last = NULL;
3432
3433         if (fbcon_has_exited)
3434                 return count;
3435
3436         console_lock();
3437         idx = con2fb_map[fg_console];
3438
3439         if (idx == -1 || registered_fb[idx] == NULL)
3440                 goto err;
3441
3442         info = registered_fb[idx];
3443         rotate = simple_strtoul(buf, last, 0);
3444         fbcon_rotate(info, rotate);
3445 err:
3446         console_unlock();
3447         return count;
3448 }
3449
3450 static ssize_t store_rotate_all(struct device *device,
3451                                 struct device_attribute *attr,const char *buf,
3452                                 size_t count)
3453 {
3454         struct fb_info *info;
3455         int rotate, idx;
3456         char **last = NULL;
3457
3458         if (fbcon_has_exited)
3459                 return count;
3460
3461         console_lock();
3462         idx = con2fb_map[fg_console];
3463
3464         if (idx == -1 || registered_fb[idx] == NULL)
3465                 goto err;
3466
3467         info = registered_fb[idx];
3468         rotate = simple_strtoul(buf, last, 0);
3469         fbcon_rotate_all(info, rotate);
3470 err:
3471         console_unlock();
3472         return count;
3473 }
3474
3475 static ssize_t show_rotate(struct device *device,
3476                            struct device_attribute *attr,char *buf)
3477 {
3478         struct fb_info *info;
3479         int rotate = 0, idx;
3480
3481         if (fbcon_has_exited)
3482                 return 0;
3483
3484         console_lock();
3485         idx = con2fb_map[fg_console];
3486
3487         if (idx == -1 || registered_fb[idx] == NULL)
3488                 goto err;
3489
3490         info = registered_fb[idx];
3491         rotate = fbcon_get_rotate(info);
3492 err:
3493         console_unlock();
3494         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3495 }
3496
3497 static ssize_t show_cursor_blink(struct device *device,
3498                                  struct device_attribute *attr, char *buf)
3499 {
3500         struct fb_info *info;
3501         struct fbcon_ops *ops;
3502         int idx, blink = -1;
3503
3504         if (fbcon_has_exited)
3505                 return 0;
3506
3507         console_lock();
3508         idx = con2fb_map[fg_console];
3509
3510         if (idx == -1 || registered_fb[idx] == NULL)
3511                 goto err;
3512
3513         info = registered_fb[idx];
3514         ops = info->fbcon_par;
3515
3516         if (!ops)
3517                 goto err;
3518
3519         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3520 err:
3521         console_unlock();
3522         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3523 }
3524
3525 static ssize_t store_cursor_blink(struct device *device,
3526                                   struct device_attribute *attr,
3527                                   const char *buf, size_t count)
3528 {
3529         struct fb_info *info;
3530         int blink, idx;
3531         char **last = NULL;
3532
3533         if (fbcon_has_exited)
3534                 return count;
3535
3536         console_lock();
3537         idx = con2fb_map[fg_console];
3538
3539         if (idx == -1 || registered_fb[idx] == NULL)
3540                 goto err;
3541
3542         info = registered_fb[idx];
3543
3544         if (!info->fbcon_par)
3545                 goto err;
3546
3547         blink = simple_strtoul(buf, last, 0);
3548
3549         if (blink) {
3550                 fbcon_cursor_noblink = 0;
3551                 fbcon_add_cursor_timer(info);
3552         } else {
3553                 fbcon_cursor_noblink = 1;
3554                 fbcon_del_cursor_timer(info);
3555         }
3556
3557 err:
3558         console_unlock();
3559         return count;
3560 }
3561
3562 static struct device_attribute device_attrs[] = {
3563         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3564         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3565         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3566                store_cursor_blink),
3567 };
3568
3569 static int fbcon_init_device(void)
3570 {
3571         int i, error = 0;
3572
3573         fbcon_has_sysfs = 1;
3574
3575         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3576                 error = device_create_file(fbcon_device, &device_attrs[i]);
3577
3578                 if (error)
3579                         break;
3580         }
3581
3582         if (error) {
3583                 while (--i >= 0)
3584                         device_remove_file(fbcon_device, &device_attrs[i]);
3585
3586                 fbcon_has_sysfs = 0;
3587         }
3588
3589         return 0;
3590 }
3591
3592 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3593 static void fbcon_register_existing_fbs(struct work_struct *work)
3594 {
3595         int i;
3596
3597         console_lock();
3598
3599         for_each_registered_fb(i)
3600                 fbcon_fb_registered(registered_fb[i]);
3601
3602         console_unlock();
3603 }
3604
3605 static struct notifier_block fbcon_output_nb;
3606 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3607
3608 static int fbcon_output_notifier(struct notifier_block *nb,
3609                                  unsigned long action, void *data)
3610 {
3611         WARN_CONSOLE_UNLOCKED();
3612
3613         pr_info("fbcon: Taking over console\n");
3614
3615         dummycon_unregister_output_notifier(&fbcon_output_nb);
3616         deferred_takeover = false;
3617         logo_shown = FBCON_LOGO_DONTSHOW;
3618
3619         /* We may get called in atomic context */
3620         schedule_work(&fbcon_deferred_takeover_work);
3621
3622         return NOTIFY_OK;
3623 }
3624 #endif
3625
3626 static void fbcon_start(void)
3627 {
3628         WARN_CONSOLE_UNLOCKED();
3629
3630 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3631         if (conswitchp != &dummy_con)
3632                 deferred_takeover = false;
3633
3634         if (deferred_takeover) {
3635                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3636                 dummycon_register_output_notifier(&fbcon_output_nb);
3637                 return;
3638         }
3639 #endif
3640
3641         if (num_registered_fb) {
3642                 int i;
3643
3644                 for_each_registered_fb(i) {
3645                         info_idx = i;
3646                         break;
3647                 }
3648
3649                 do_fbcon_takeover(0);
3650         }
3651 }
3652
3653 static void fbcon_exit(void)
3654 {
3655         struct fb_info *info;
3656         int i, j, mapped;
3657
3658         if (fbcon_has_exited)
3659                 return;
3660
3661 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3662         if (deferred_takeover) {
3663                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3664                 deferred_takeover = false;
3665         }
3666 #endif
3667
3668         kfree((void *)softback_buf);
3669         softback_buf = 0UL;
3670
3671         for_each_registered_fb(i) {
3672                 int pending = 0;
3673
3674                 mapped = 0;
3675                 info = registered_fb[i];
3676
3677                 if (info->queue.func)
3678                         pending = cancel_work_sync(&info->queue);
3679                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3680                         "no"));
3681
3682                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3683                         if (con2fb_map[j] == i) {
3684                                 mapped = 1;
3685                                 break;
3686                         }
3687                 }
3688
3689                 if (mapped) {
3690                         if (info->fbops->fb_release)
3691                                 info->fbops->fb_release(info, 0);
3692                         module_put(info->fbops->owner);
3693
3694                         if (info->fbcon_par) {
3695                                 struct fbcon_ops *ops = info->fbcon_par;
3696
3697                                 fbcon_del_cursor_timer(info);
3698                                 kfree(ops->cursor_src);
3699                                 kfree(ops->cursor_state.mask);
3700                                 kfree(info->fbcon_par);
3701                                 info->fbcon_par = NULL;
3702                         }
3703
3704                         if (info->queue.func == fb_flashcursor)
3705                                 info->queue.func = NULL;
3706                 }
3707         }
3708
3709         fbcon_has_exited = 1;
3710 }
3711
3712 void __init fb_console_init(void)
3713 {
3714         int i;
3715
3716         console_lock();
3717         fb_register_client(&fbcon_event_notifier);
3718         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3719                                      "fbcon");
3720
3721         if (IS_ERR(fbcon_device)) {
3722                 printk(KERN_WARNING "Unable to create device "
3723                        "for fbcon; errno = %ld\n",
3724                        PTR_ERR(fbcon_device));
3725                 fbcon_device = NULL;
3726         } else
3727                 fbcon_init_device();
3728
3729         for (i = 0; i < MAX_NR_CONSOLES; i++)
3730                 con2fb_map[i] = -1;
3731
3732         fbcon_start();
3733         console_unlock();
3734 }
3735
3736 #ifdef MODULE
3737
3738 static void __exit fbcon_deinit_device(void)
3739 {
3740         int i;
3741
3742         if (fbcon_has_sysfs) {
3743                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3744                         device_remove_file(fbcon_device, &device_attrs[i]);
3745
3746                 fbcon_has_sysfs = 0;
3747         }
3748 }
3749
3750 void __exit fb_console_exit(void)
3751 {
3752         console_lock();
3753         fb_unregister_client(&fbcon_event_notifier);
3754         fbcon_deinit_device();
3755         device_destroy(fb_class, MKDEV(0, 0));
3756         fbcon_exit();
3757         do_unregister_con_driver(&fb_con);
3758         console_unlock();
3759 }
3760 #endif