drivers/video/fbdev/core/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/fbcon.h>
  72 #include <linux/vt_kern.h>
  73 #include <linux/selection.h>
  74 #include <linux/font.h>
  75 #include <linux/smp.h>
  76 #include <linux/init.h>
  77 #include <linux/interrupt.h>
  78 #include <linux/crc32.h> /* For counting font checksums */
  79 #include <linux/uaccess.h>
  80 #include <asm/fb.h>
  81 #include <asm/irq.h>
  82
  83 #include "fbcon.h"
  84
  85 #ifdef FBCONDEBUG
  86 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  87 #else
  88 #  define DPRINTK(fmt, args...)
  89 #endif
  90
  91 /*
  92  * FIXME: Locking
  93  *
  94  * - fbcon state itself is protected by the console_lock, and the code does a
  95  *   pretty good job at making sure that lock is held everywhere it's needed.
  96  *
  97  * - access to the registered_fb array is entirely unprotected. This should use
  98  *   proper object lifetime handling, i.e. get/put_fb_info. This also means
  99  *   switching from indices to proper pointers for fb_info everywhere.
 100  *
 101  * - fbcon doesn't bother with fb_lock/unlock at all. This is buggy, since it
 102  *   means concurrent access to the same fbdev from both fbcon and userspace
 103  *   will blow up. To fix this all fbcon calls from fbmem.c need to be moved out
 104  *   of fb_lock/unlock protected sections, since otherwise we'll recurse and
 105  *   deadlock eventually. Aside: Due to these deadlock issues the fbdev code in
 106  *   fbmem.c cannot use locking asserts, and there's lots of callers which get
 107  *   the rules wrong, e.g. fbsysfs.c entirely missed fb_lock/unlock calls too.
 108  */
 109
 110 enum {
 111         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 112         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 113         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 114 };
 115
 116 static struct fbcon_display fb_display[MAX_NR_CONSOLES];
 117
 118 static signed char con2fb_map[MAX_NR_CONSOLES];
 119 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 120
 121 static int logo_lines;
 122 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 123    enums.  */
 124 static int logo_shown = FBCON_LOGO_CANSHOW;
 125 /* Software scrollback */
 126 static int fbcon_softback_size = 32768;
 127 static unsigned long softback_buf, softback_curr;
 128 static unsigned long softback_in;
 129 static unsigned long softback_top, softback_end;
 130 static int softback_lines;
 131 /* console mappings */
 132 static int first_fb_vc;
 133 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 134 static int fbcon_is_default = 1;
 135 static int primary_device = -1;
 136 static int fbcon_has_console_bind;
 137
 138 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 139 static int map_override;
 140
 141 static inline void fbcon_map_override(void)
 142 {
 143         map_override = 1;
 144 }
 145 #else
 146 static inline void fbcon_map_override(void)
 147 {
 148 }
 149 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 150
 151 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 152 static bool deferred_takeover = true;
 153 #else
 154 #define deferred_takeover false
 155 #endif
 156
 157 /* font data */
 158 static char fontname[40];
 159
 160 /* current fb_info */
 161 static int info_idx = -1;
 162
 163 /* console rotation */
 164 static int initial_rotation = -1;
 165 static int fbcon_has_sysfs;
 166 static int margin_color;
 167
 168 static const struct consw fb_con;
 169
 170 #define CM_SOFTBACK     (8)
 171
 172 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 173
 174 static int fbcon_set_origin(struct vc_data *);
 175
 176 static int fbcon_cursor_noblink;
 177
 178 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 179
 180 /*
 181  *  Interface used by the world
 182  */
 183
 184 static const char *fbcon_startup(void);
 185 static void fbcon_init(struct vc_data *vc, int init);
 186 static void fbcon_deinit(struct vc_data *vc);
 187 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 188                         int width);
 189 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 190 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 191                         int count, int ypos, int xpos);
 192 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 193 static void fbcon_cursor(struct vc_data *vc, int mode);
 194 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 195                         int height, int width);
 196 static int fbcon_switch(struct vc_data *vc);
 197 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 198 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table);
 199
 200 /*
 201  *  Internal routines
 202  */
 203 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 204 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 205 static __inline__ void ypan_up(struct vc_data *vc, int count);
 206 static __inline__ void ypan_down(struct vc_data *vc, int count);
 207 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
 208                             int dy, int dx, int height, int width, u_int y_break);
 209 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 210                            int unit);
 211 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 212                               int line, int count, int dy);
 213 static void fbcon_modechanged(struct fb_info *info);
 214 static void fbcon_set_all_vcs(struct fb_info *info);
 215 static void fbcon_start(void);
 216 static void fbcon_exit(void);
 217 static struct device *fbcon_device;
 218
 219 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 220 static inline void fbcon_set_rotation(struct fb_info *info)
 221 {
 222         struct fbcon_ops *ops = info->fbcon_par;
 223
 224         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 225             ops->p->con_rotate < 4)
 226                 ops->rotate = ops->p->con_rotate;
 227         else
 228                 ops->rotate = 0;
 229 }
 230
 231 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 232 {
 233         struct fbcon_ops *ops= info->fbcon_par;
 234         struct fb_info *fb_info;
 235
 236         if (!ops || ops->currcon == -1)
 237                 return;
 238
 239         fb_info = registered_fb[con2fb_map[ops->currcon]];
 240
 241         if (info == fb_info) {
 242                 struct fbcon_display *p = &fb_display[ops->currcon];
 243
 244                 if (rotate < 4)
 245                         p->con_rotate = rotate;
 246                 else
 247                         p->con_rotate = 0;
 248
 249                 fbcon_modechanged(info);
 250         }
 251 }
 252
 253 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 254 {
 255         struct fbcon_ops *ops = info->fbcon_par;
 256         struct vc_data *vc;
 257         struct fbcon_display *p;
 258         int i;
 259
 260         if (!ops || ops->currcon < 0 || rotate > 3)
 261                 return;
 262
 263         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 264                 vc = vc_cons[i].d;
 265                 if (!vc || vc->vc_mode != KD_TEXT ||
 266                     registered_fb[con2fb_map[i]] != info)
 267                         continue;
 268
 269                 p = &fb_display[vc->vc_num];
 270                 p->con_rotate = rotate;
 271         }
 272
 273         fbcon_set_all_vcs(info);
 274 }
 275 #else
 276 static inline void fbcon_set_rotation(struct fb_info *info)
 277 {
 278         struct fbcon_ops *ops = info->fbcon_par;
 279
 280         ops->rotate = FB_ROTATE_UR;
 281 }
 282
 283 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 284 {
 285         return;
 286 }
 287
 288 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 289 {
 290         return;
 291 }
 292 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 293
 294 static int fbcon_get_rotate(struct fb_info *info)
 295 {
 296         struct fbcon_ops *ops = info->fbcon_par;
 297
 298         return (ops) ? ops->rotate : 0;
 299 }
 300
 301 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 302 {
 303         struct fbcon_ops *ops = info->fbcon_par;
 304
 305         return (info->state != FBINFO_STATE_RUNNING ||
 306                 vc->vc_mode != KD_TEXT || ops->graphics);
 307 }
 308
 309 static int get_color(struct vc_data *vc, struct fb_info *info,
 310               u16 c, int is_fg)
 311 {
 312         int depth = fb_get_color_depth(&info->var, &info->fix);
 313         int color = 0;
 314
 315         if (console_blanked) {
 316                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 317
 318                 c = vc->vc_video_erase_char & charmask;
 319         }
 320
 321         if (depth != 1)
 322                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 323                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 324
 325         switch (depth) {
 326         case 1:
 327         {
 328                 int col = mono_col(info);
 329                 /* 0 or 1 */
 330                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 331                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 332
 333                 if (console_blanked)
 334                         fg = bg;
 335
 336                 color = (is_fg) ? fg : bg;
 337                 break;
 338         }
 339         case 2:
 340                 /*
 341                  * Scale down 16-colors to 4 colors. Default 4-color palette
 342                  * is grayscale. However, simply dividing the values by 4
 343                  * will not work, as colors 1, 2 and 3 will be scaled-down
 344                  * to zero rendering them invisible.  So empirically convert
 345                  * colors to a sane 4-level grayscale.
 346                  */
 347                 switch (color) {
 348                 case 0:
 349                         color = 0; /* black */
 350                         break;
 351                 case 1 ... 6:
 352                         color = 2; /* white */
 353                         break;
 354                 case 7 ... 8:
 355                         color = 1; /* gray */
 356                         break;
 357                 default:
 358                         color = 3; /* intense white */
 359                         break;
 360                 }
 361                 break;
 362         case 3:
 363                 /*
 364                  * Last 8 entries of default 16-color palette is a more intense
 365                  * version of the first 8 (i.e., same chrominance, different
 366                  * luminance).
 367                  */
 368                 color &= 7;
 369                 break;
 370         }
 371
 372
 373         return color;
 374 }
 375
 376 static void fbcon_update_softback(struct vc_data *vc)
 377 {
 378         int l = fbcon_softback_size / vc->vc_size_row;
 379
 380         if (l > 5)
 381                 softback_end = softback_buf + l * vc->vc_size_row;
 382         else
 383                 /* Smaller scrollback makes no sense, and 0 would screw
 384                    the operation totally */
 385                 softback_top = 0;
 386 }
 387
 388 static void fb_flashcursor(struct work_struct *work)
 389 {
 390         struct fb_info *info = container_of(work, struct fb_info, queue);
 391         struct fbcon_ops *ops = info->fbcon_par;
 392         struct vc_data *vc = NULL;
 393         int c;
 394         int mode;
 395         int ret;
 396
 397         /* FIXME: we should sort out the unbind locking instead */
 398         /* instead we just fail to flash the cursor if we can't get
 399          * the lock instead of blocking fbcon deinit */
 400         ret = console_trylock();
 401         if (ret == 0)
 402                 return;
 403
 404         if (ops && ops->currcon != -1)
 405                 vc = vc_cons[ops->currcon].d;
 406
 407         if (!vc || !con_is_visible(vc) ||
 408             registered_fb[con2fb_map[vc->vc_num]] != info ||
 409             vc->vc_deccm != 1) {
 410                 console_unlock();
 411                 return;
 412         }
 413
 414         c = scr_readw((u16 *) vc->vc_pos);
 415         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 416                 CM_ERASE : CM_DRAW;
 417         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 418                     get_color(vc, info, c, 0));
 419         console_unlock();
 420 }
 421
 422 static void cursor_timer_handler(struct timer_list *t)
 423 {
 424         struct fbcon_ops *ops = from_timer(ops, t, cursor_timer);
 425         struct fb_info *info = ops->info;
 426
 427         queue_work(system_power_efficient_wq, &info->queue);
 428         mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 429 }
 430
 431 static void fbcon_add_cursor_timer(struct fb_info *info)
 432 {
 433         struct fbcon_ops *ops = info->fbcon_par;
 434
 435         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 436             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 437             !fbcon_cursor_noblink) {
 438                 if (!info->queue.func)
 439                         INIT_WORK(&info->queue, fb_flashcursor);
 440
 441                 timer_setup(&ops->cursor_timer, cursor_timer_handler, 0);
 442                 mod_timer(&ops->cursor_timer, jiffies + ops->cur_blink_jiffies);
 443                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 444         }
 445 }
 446
 447 static void fbcon_del_cursor_timer(struct fb_info *info)
 448 {
 449         struct fbcon_ops *ops = info->fbcon_par;
 450
 451         if (info->queue.func == fb_flashcursor &&
 452             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 453                 del_timer_sync(&ops->cursor_timer);
 454                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 455         }
 456 }
 457
 458 #ifndef MODULE
 459 static int __init fb_console_setup(char *this_opt)
 460 {
 461         char *options;
 462         int i, j;
 463
 464         if (!this_opt || !*this_opt)
 465                 return 1;
 466
 467         while ((options = strsep(&this_opt, ",")) != NULL) {
 468                 if (!strncmp(options, "font:", 5)) {
 469                         strlcpy(fontname, options + 5, sizeof(fontname));
 470                         continue;
 471                 }
 472
 473                 if (!strncmp(options, "scrollback:", 11)) {
 474                         options += 11;
 475                         if (*options) {
 476                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 477                                 if (*options == 'k' || *options == 'K') {
 478                                         fbcon_softback_size *= 1024;
 479                                 }
 480                         }
 481                         continue;
 482                 }
 483
 484                 if (!strncmp(options, "map:", 4)) {
 485                         options += 4;
 486                         if (*options) {
 487                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 488                                         if (!options[j])
 489                                                 j = 0;
 490                                         con2fb_map_boot[i] =
 491                                                 (options[j++]-'0') % FB_MAX;
 492                                 }
 493
 494                                 fbcon_map_override();
 495                         }
 496                         continue;
 497                 }
 498
 499                 if (!strncmp(options, "vc:", 3)) {
 500                         options += 3;
 501                         if (*options)
 502                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 503                         if (first_fb_vc < 0)
 504                                 first_fb_vc = 0;
 505                         if (*options++ == '-')
 506                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 507                         fbcon_is_default = 0;
 508                         continue;
 509                 }
 510
 511                 if (!strncmp(options, "rotate:", 7)) {
 512                         options += 7;
 513                         if (*options)
 514                                 initial_rotation = simple_strtoul(options, &options, 0);
 515                         if (initial_rotation > 3)
 516                                 initial_rotation = 0;
 517                         continue;
 518                 }
 519
 520                 if (!strncmp(options, "margin:", 7)) {
 521                         options += 7;
 522                         if (*options)
 523                                 margin_color = simple_strtoul(options, &options, 0);
 524                         continue;
 525                 }
 526 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
 527                 if (!strcmp(options, "nodefer")) {
 528                         deferred_takeover = false;
 529                         continue;
 530                 }
 531 #endif
 532
 533                 if (!strncmp(options, "logo-pos:", 9)) {
 534                         options += 9;
 535                         if (!strcmp(options, "center"))
 536                                 fb_center_logo = true;
 537                         continue;
 538                 }
 539         }
 540         return 1;
 541 }
 542
 543 __setup("fbcon=", fb_console_setup);
 544 #endif
 545
 546 static int search_fb_in_map(int idx)
 547 {
 548         int i, retval = 0;
 549
 550         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 551                 if (con2fb_map[i] == idx)
 552                         retval = 1;
 553         }
 554         return retval;
 555 }
 556
 557 static int search_for_mapped_con(void)
 558 {
 559         int i, retval = 0;
 560
 561         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 562                 if (con2fb_map[i] != -1)
 563                         retval = 1;
 564         }
 565         return retval;
 566 }
 567
 568 static int do_fbcon_takeover(int show_logo)
 569 {
 570         int err, i;
 571
 572         if (!num_registered_fb)
 573                 return -ENODEV;
 574
 575         if (!show_logo)
 576                 logo_shown = FBCON_LOGO_DONTSHOW;
 577
 578         for (i = first_fb_vc; i <= last_fb_vc; i++)
 579                 con2fb_map[i] = info_idx;
 580
 581         err = do_take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 582                                 fbcon_is_default);
 583
 584         if (err) {
 585                 for (i = first_fb_vc; i <= last_fb_vc; i++)
 586                         con2fb_map[i] = -1;
 587                 info_idx = -1;
 588         } else {
 589                 fbcon_has_console_bind = 1;
 590         }
 591
 592         return err;
 593 }
 594
 595 #ifdef MODULE
 596 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 597                                int cols, int rows, int new_cols, int new_rows)
 598 {
 599         logo_shown = FBCON_LOGO_DONTSHOW;
 600 }
 601 #else
 602 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 603                                int cols, int rows, int new_cols, int new_rows)
 604 {
 605         /* Need to make room for the logo */
 606         struct fbcon_ops *ops = info->fbcon_par;
 607         int cnt, erase = vc->vc_video_erase_char, step;
 608         unsigned short *save = NULL, *r, *q;
 609         int logo_height;
 610
 611         if (info->fbops->owner) {
 612                 logo_shown = FBCON_LOGO_DONTSHOW;
 613                 return;
 614         }
 615
 616         /*
 617          * remove underline attribute from erase character
 618          * if black and white framebuffer.
 619          */
 620         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 621                 erase &= ~0x400;
 622         logo_height = fb_prepare_logo(info, ops->rotate);
 623         logo_lines = DIV_ROUND_UP(logo_height, vc->vc_font.height);
 624         q = (unsigned short *) (vc->vc_origin +
 625                                 vc->vc_size_row * rows);
 626         step = logo_lines * cols;
 627         for (r = q - logo_lines * cols; r < q; r++)
 628                 if (scr_readw(r) != vc->vc_video_erase_char)
 629                         break;
 630         if (r != q && new_rows >= rows + logo_lines) {
 631                 save = kmalloc(array3_size(logo_lines, new_cols, 2),
 632                                GFP_KERNEL);
 633                 if (save) {
 634                         int i = cols < new_cols ? cols : new_cols;
 635                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 636                         r = q - step;
 637                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 638                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 639                         r = q;
 640                 }
 641         }
 642         if (r == q) {
 643                 /* We can scroll screen down */
 644                 r = q - step - cols;
 645                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 646                         scr_memcpyw(r + step, r, vc->vc_size_row);
 647                         r -= cols;
 648                 }
 649                 if (!save) {
 650                         int lines;
 651                         if (vc->vc_y + logo_lines >= rows)
 652                                 lines = rows - vc->vc_y - 1;
 653                         else
 654                                 lines = logo_lines;
 655                         vc->vc_y += lines;
 656                         vc->vc_pos += lines * vc->vc_size_row;
 657                 }
 658         }
 659         scr_memsetw((unsigned short *) vc->vc_origin,
 660                     erase,
 661                     vc->vc_size_row * logo_lines);
 662
 663         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
 664                 fbcon_clear_margins(vc, 0);
 665                 update_screen(vc);
 666         }
 667
 668         if (save) {
 669                 q = (unsigned short *) (vc->vc_origin +
 670                                         vc->vc_size_row *
 671                                         rows);
 672                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 673                 vc->vc_y += logo_lines;
 674                 vc->vc_pos += logo_lines * vc->vc_size_row;
 675                 kfree(save);
 676         }
 677
 678         if (logo_shown == FBCON_LOGO_DONTSHOW)
 679                 return;
 680
 681         if (logo_lines > vc->vc_bottom) {
 682                 logo_shown = FBCON_LOGO_CANSHOW;
 683                 printk(KERN_INFO
 684                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 685         } else {
 686                 logo_shown = FBCON_LOGO_DRAW;
 687                 vc->vc_top = logo_lines;
 688         }
 689 }
 690 #endif /* MODULE */
 691
 692 #ifdef CONFIG_FB_TILEBLITTING
 693 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 694 {
 695         struct fbcon_ops *ops = info->fbcon_par;
 696
 697         ops->p = &fb_display[vc->vc_num];
 698
 699         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 700                 fbcon_set_tileops(vc, info);
 701         else {
 702                 fbcon_set_rotation(info);
 703                 fbcon_set_bitops(ops);
 704         }
 705 }
 706
 707 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 708 {
 709         int err = 0;
 710
 711         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 712             info->tileops->fb_get_tilemax(info) < charcount)
 713                 err = 1;
 714
 715         return err;
 716 }
 717 #else
 718 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 719 {
 720         struct fbcon_ops *ops = info->fbcon_par;
 721
 722         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 723         ops->p = &fb_display[vc->vc_num];
 724         fbcon_set_rotation(info);
 725         fbcon_set_bitops(ops);
 726 }
 727
 728 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 729 {
 730         return 0;
 731 }
 732
 733 #endif /* CONFIG_MISC_TILEBLITTING */
 734
 735
 736 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 737                                   int unit, int oldidx)
 738 {
 739         struct fbcon_ops *ops = NULL;
 740         int err = 0;
 741
 742         if (!try_module_get(info->fbops->owner))
 743                 err = -ENODEV;
 744
 745         if (!err && info->fbops->fb_open &&
 746             info->fbops->fb_open(info, 0))
 747                 err = -ENODEV;
 748
 749         if (!err) {
 750                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 751                 if (!ops)
 752                         err = -ENOMEM;
 753         }
 754
 755         if (!err) {
 756                 ops->cur_blink_jiffies = HZ / 5;
 757                 ops->info = info;
 758                 info->fbcon_par = ops;
 759
 760                 if (vc)
 761                         set_blitting_type(vc, info);
 762         }
 763
 764         if (err) {
 765                 con2fb_map[unit] = oldidx;
 766                 module_put(info->fbops->owner);
 767         }
 768
 769         return err;
 770 }
 771
 772 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 773                                   struct fb_info *newinfo, int unit,
 774                                   int oldidx, int found)
 775 {
 776         struct fbcon_ops *ops = oldinfo->fbcon_par;
 777         int err = 0, ret;
 778
 779         if (oldinfo->fbops->fb_release &&
 780             oldinfo->fbops->fb_release(oldinfo, 0)) {
 781                 con2fb_map[unit] = oldidx;
 782                 if (!found && newinfo->fbops->fb_release)
 783                         newinfo->fbops->fb_release(newinfo, 0);
 784                 if (!found)
 785                         module_put(newinfo->fbops->owner);
 786                 err = -ENODEV;
 787         }
 788
 789         if (!err) {
 790                 fbcon_del_cursor_timer(oldinfo);
 791                 kfree(ops->cursor_state.mask);
 792                 kfree(ops->cursor_data);
 793                 kfree(ops->cursor_src);
 794                 kfree(ops->fontbuffer);
 795                 kfree(oldinfo->fbcon_par);
 796                 oldinfo->fbcon_par = NULL;
 797                 module_put(oldinfo->fbops->owner);
 798                 /*
 799                   If oldinfo and newinfo are driving the same hardware,
 800                   the fb_release() method of oldinfo may attempt to
 801                   restore the hardware state.  This will leave the
 802                   newinfo in an undefined state. Thus, a call to
 803                   fb_set_par() may be needed for the newinfo.
 804                 */
 805                 if (newinfo && newinfo->fbops->fb_set_par) {
 806                         ret = newinfo->fbops->fb_set_par(newinfo);
 807
 808                         if (ret)
 809                                 printk(KERN_ERR "con2fb_release_oldinfo: "
 810                                         "detected unhandled fb_set_par error, "
 811                                         "error code %d\n", ret);
 812                 }
 813         }
 814
 815         return err;
 816 }
 817
 818 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 819                                 int unit, int show_logo)
 820 {
 821         struct fbcon_ops *ops = info->fbcon_par;
 822         int ret;
 823
 824         ops->currcon = fg_console;
 825
 826         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT)) {
 827                 ret = info->fbops->fb_set_par(info);
 828
 829                 if (ret)
 830                         printk(KERN_ERR "con2fb_init_display: detected "
 831                                 "unhandled fb_set_par error, "
 832                                 "error code %d\n", ret);
 833         }
 834
 835         ops->flags |= FBCON_FLAGS_INIT;
 836         ops->graphics = 0;
 837         fbcon_set_disp(info, &info->var, unit);
 838
 839         if (show_logo) {
 840                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 841                 struct fb_info *fg_info =
 842                         registered_fb[con2fb_map[fg_console]];
 843
 844                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 845                                    fg_vc->vc_rows, fg_vc->vc_cols,
 846                                    fg_vc->vc_rows);
 847         }
 848
 849         update_screen(vc_cons[fg_console].d);
 850 }
 851
 852 /**
 853  *      set_con2fb_map - map console to frame buffer device
 854  *      @unit: virtual console number to map
 855  *      @newidx: frame buffer index to map virtual console to
 856  *      @user: user request
 857  *
 858  *      Maps a virtual console @unit to a frame buffer device
 859  *      @newidx.
 860  *
 861  *      This should be called with the console lock held.
 862  */
 863 static int set_con2fb_map(int unit, int newidx, int user)
 864 {
 865         struct vc_data *vc = vc_cons[unit].d;
 866         int oldidx = con2fb_map[unit];
 867         struct fb_info *info = registered_fb[newidx];
 868         struct fb_info *oldinfo = NULL;
 869         int found, err = 0;
 870
 871         WARN_CONSOLE_UNLOCKED();
 872
 873         if (oldidx == newidx)
 874                 return 0;
 875
 876         if (!info)
 877                 return -EINVAL;
 878
 879         if (!search_for_mapped_con() || !con_is_bound(&fb_con)) {
 880                 info_idx = newidx;
 881                 return do_fbcon_takeover(0);
 882         }
 883
 884         if (oldidx != -1)
 885                 oldinfo = registered_fb[oldidx];
 886
 887         found = search_fb_in_map(newidx);
 888
 889         con2fb_map[unit] = newidx;
 890         if (!err && !found)
 891                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 892
 893
 894         /*
 895          * If old fb is not mapped to any of the consoles,
 896          * fbcon should release it.
 897          */
 898         if (!err && oldinfo && !search_fb_in_map(oldidx))
 899                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 900                                              found);
 901
 902         if (!err) {
 903                 int show_logo = (fg_console == 0 && !user &&
 904                                  logo_shown != FBCON_LOGO_DONTSHOW);
 905
 906                 if (!found)
 907                         fbcon_add_cursor_timer(info);
 908                 con2fb_map_boot[unit] = newidx;
 909                 con2fb_init_display(vc, info, unit, show_logo);
 910         }
 911
 912         if (!search_fb_in_map(info_idx))
 913                 info_idx = newidx;
 914
 915         return err;
 916 }
 917
 918 /*
 919  *  Low Level Operations
 920  */
 921 /* NOTE: fbcon cannot be __init: it may be called from do_take_over_console later */
 922 static int var_to_display(struct fbcon_display *disp,
 923                           struct fb_var_screeninfo *var,
 924                           struct fb_info *info)
 925 {
 926         disp->xres_virtual = var->xres_virtual;
 927         disp->yres_virtual = var->yres_virtual;
 928         disp->bits_per_pixel = var->bits_per_pixel;
 929         disp->grayscale = var->grayscale;
 930         disp->nonstd = var->nonstd;
 931         disp->accel_flags = var->accel_flags;
 932         disp->height = var->height;
 933         disp->width = var->width;
 934         disp->red = var->red;
 935         disp->green = var->green;
 936         disp->blue = var->blue;
 937         disp->transp = var->transp;
 938         disp->rotate = var->rotate;
 939         disp->mode = fb_match_mode(var, &info->modelist);
 940         if (disp->mode == NULL)
 941                 /* This should not happen */
 942                 return -EINVAL;
 943         return 0;
 944 }
 945
 946 static void display_to_var(struct fb_var_screeninfo *var,
 947                            struct fbcon_display *disp)
 948 {
 949         fb_videomode_to_var(var, disp->mode);
 950         var->xres_virtual = disp->xres_virtual;
 951         var->yres_virtual = disp->yres_virtual;
 952         var->bits_per_pixel = disp->bits_per_pixel;
 953         var->grayscale = disp->grayscale;
 954         var->nonstd = disp->nonstd;
 955         var->accel_flags = disp->accel_flags;
 956         var->height = disp->height;
 957         var->width = disp->width;
 958         var->red = disp->red;
 959         var->green = disp->green;
 960         var->blue = disp->blue;
 961         var->transp = disp->transp;
 962         var->rotate = disp->rotate;
 963 }
 964
 965 static const char *fbcon_startup(void)
 966 {
 967         const char *display_desc = "frame buffer device";
 968         struct fbcon_display *p = &fb_display[fg_console];
 969         struct vc_data *vc = vc_cons[fg_console].d;
 970         const struct font_desc *font = NULL;
 971         struct module *owner;
 972         struct fb_info *info = NULL;
 973         struct fbcon_ops *ops;
 974         int rows, cols;
 975
 976         /*
 977          *  If num_registered_fb is zero, this is a call for the dummy part.
 978          *  The frame buffer devices weren't initialized yet.
 979          */
 980         if (!num_registered_fb || info_idx == -1)
 981                 return display_desc;
 982         /*
 983          * Instead of blindly using registered_fb[0], we use info_idx, set by
 984          * fb_console_init();
 985          */
 986         info = registered_fb[info_idx];
 987         if (!info)
 988                 return NULL;
 989
 990         owner = info->fbops->owner;
 991         if (!try_module_get(owner))
 992                 return NULL;
 993         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 994                 module_put(owner);
 995                 return NULL;
 996         }
 997
 998         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 999         if (!ops) {
1000                 module_put(owner);
1001                 return NULL;
1002         }
1003
1004         ops->currcon = -1;
1005         ops->graphics = 1;
1006         ops->cur_rotate = -1;
1007         ops->cur_blink_jiffies = HZ / 5;
1008         ops->info = info;
1009         info->fbcon_par = ops;
1010
1011         p->con_rotate = initial_rotation;
1012         if (p->con_rotate == -1)
1013                 p->con_rotate = info->fbcon_rotate_hint;
1014         if (p->con_rotate == -1)
1015                 p->con_rotate = FB_ROTATE_UR;
1016
1017         set_blitting_type(vc, info);
1018
1019         if (info->fix.type != FB_TYPE_TEXT) {
1020                 if (fbcon_softback_size) {
1021                         if (!softback_buf) {
1022                                 softback_buf =
1023                                     (unsigned long)
1024                                     kvmalloc(fbcon_softback_size,
1025                                             GFP_KERNEL);
1026                                 if (!softback_buf) {
1027                                         fbcon_softback_size = 0;
1028                                         softback_top = 0;
1029                                 }
1030                         }
1031                 } else {
1032                         if (softback_buf) {
1033                                 kvfree((void *) softback_buf);
1034                                 softback_buf = 0;
1035                                 softback_top = 0;
1036                         }
1037                 }
1038                 if (softback_buf)
1039                         softback_in = softback_top = softback_curr =
1040                             softback_buf;
1041                 softback_lines = 0;
1042         }
1043
1044         /* Setup default font */
1045         if (!p->fontdata && !vc->vc_font.data) {
1046                 if (!fontname[0] || !(font = find_font(fontname)))
1047                         font = get_default_font(info->var.xres,
1048                                                 info->var.yres,
1049                                                 info->pixmap.blit_x,
1050                                                 info->pixmap.blit_y);
1051                 vc->vc_font.width = font->width;
1052                 vc->vc_font.height = font->height;
1053                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1054                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1055         } else {
1056                 p->fontdata = vc->vc_font.data;
1057         }
1058
1059         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1060         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1061         cols /= vc->vc_font.width;
1062         rows /= vc->vc_font.height;
1063         vc_resize(vc, cols, rows);
1064
1065         DPRINTK("mode:   %s\n", info->fix.id);
1066         DPRINTK("visual: %d\n", info->fix.visual);
1067         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1068                 info->var.yres,
1069                 info->var.bits_per_pixel);
1070
1071         fbcon_add_cursor_timer(info);
1072         return display_desc;
1073 }
1074
1075 static void fbcon_init(struct vc_data *vc, int init)
1076 {
1077         struct fb_info *info;
1078         struct fbcon_ops *ops;
1079         struct vc_data **default_mode = vc->vc_display_fg;
1080         struct vc_data *svc = *default_mode;
1081         struct fbcon_display *t, *p = &fb_display[vc->vc_num];
1082         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1083         int cap, ret;
1084
1085         if (WARN_ON(info_idx == -1))
1086             return;
1087
1088         if (con2fb_map[vc->vc_num] == -1)
1089                 con2fb_map[vc->vc_num] = info_idx;
1090
1091         info = registered_fb[con2fb_map[vc->vc_num]];
1092         cap = info->flags;
1093
1094         if (logo_shown < 0 && console_loglevel <= CONSOLE_LOGLEVEL_QUIET)
1095                 logo_shown = FBCON_LOGO_DONTSHOW;
1096
1097         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1098             (info->fix.type == FB_TYPE_TEXT))
1099                 logo = 0;
1100
1101         if (var_to_display(p, &info->var, info))
1102                 return;
1103
1104         if (!info->fbcon_par)
1105                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1106
1107         /* If we are not the first console on this
1108            fb, copy the font from that console */
1109         t = &fb_display[fg_console];
1110         if (!p->fontdata) {
1111                 if (t->fontdata) {
1112                         struct vc_data *fvc = vc_cons[fg_console].d;
1113
1114                         vc->vc_font.data = (void *)(p->fontdata =
1115                                                     fvc->vc_font.data);
1116                         vc->vc_font.width = fvc->vc_font.width;
1117                         vc->vc_font.height = fvc->vc_font.height;
1118                         p->userfont = t->userfont;
1119
1120                         if (p->userfont)
1121                                 REFCOUNT(p->fontdata)++;
1122                 } else {
1123                         const struct font_desc *font = NULL;
1124
1125                         if (!fontname[0] || !(font = find_font(fontname)))
1126                                 font = get_default_font(info->var.xres,
1127                                                         info->var.yres,
1128                                                         info->pixmap.blit_x,
1129                                                         info->pixmap.blit_y);
1130                         vc->vc_font.width = font->width;
1131                         vc->vc_font.height = font->height;
1132                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1133                         vc->vc_font.charcount = 256; /* FIXME  Need to
1134                                                         support more fonts */
1135                 }
1136         }
1137
1138         if (p->userfont)
1139                 charcnt = FNTCHARCNT(p->fontdata);
1140
1141         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1142         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1143         if (charcnt == 256) {
1144                 vc->vc_hi_font_mask = 0;
1145         } else {
1146                 vc->vc_hi_font_mask = 0x100;
1147                 if (vc->vc_can_do_color)
1148                         vc->vc_complement_mask <<= 1;
1149         }
1150
1151         if (!*svc->vc_uni_pagedir_loc)
1152                 con_set_default_unimap(svc);
1153         if (!*vc->vc_uni_pagedir_loc)
1154                 con_copy_unimap(vc, svc);
1155
1156         ops = info->fbcon_par;
1157         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1158
1159         p->con_rotate = initial_rotation;
1160         if (p->con_rotate == -1)
1161                 p->con_rotate = info->fbcon_rotate_hint;
1162         if (p->con_rotate == -1)
1163                 p->con_rotate = FB_ROTATE_UR;
1164
1165         set_blitting_type(vc, info);
1166
1167         cols = vc->vc_cols;
1168         rows = vc->vc_rows;
1169         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1170         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1171         new_cols /= vc->vc_font.width;
1172         new_rows /= vc->vc_font.height;
1173
1174         /*
1175          * We must always set the mode. The mode of the previous console
1176          * driver could be in the same resolution but we are using different
1177          * hardware so we have to initialize the hardware.
1178          *
1179          * We need to do it in fbcon_init() to prevent screen corruption.
1180          */
1181         if (con_is_visible(vc) && vc->vc_mode == KD_TEXT) {
1182                 if (info->fbops->fb_set_par &&
1183                     !(ops->flags & FBCON_FLAGS_INIT)) {
1184                         ret = info->fbops->fb_set_par(info);
1185
1186                         if (ret)
1187                                 printk(KERN_ERR "fbcon_init: detected "
1188                                         "unhandled fb_set_par error, "
1189                                         "error code %d\n", ret);
1190                 }
1191
1192                 ops->flags |= FBCON_FLAGS_INIT;
1193         }
1194
1195         ops->graphics = 0;
1196
1197         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1198             !(cap & FBINFO_HWACCEL_DISABLED))
1199                 p->scrollmode = SCROLL_MOVE;
1200         else /* default to something safe */
1201                 p->scrollmode = SCROLL_REDRAW;
1202
1203         /*
1204          *  ++guenther: console.c:vc_allocate() relies on initializing
1205          *  vc_{cols,rows}, but we must not set those if we are only
1206          *  resizing the console.
1207          */
1208         if (init) {
1209                 vc->vc_cols = new_cols;
1210                 vc->vc_rows = new_rows;
1211         } else
1212                 vc_resize(vc, new_cols, new_rows);
1213
1214         if (logo)
1215                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1216
1217         if (vc == svc && softback_buf)
1218                 fbcon_update_softback(vc);
1219
1220         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1221                 ops->rotate = FB_ROTATE_UR;
1222                 set_blitting_type(vc, info);
1223         }
1224
1225         ops->p = &fb_display[fg_console];
1226 }
1227
1228 static void fbcon_free_font(struct fbcon_display *p, bool freefont)
1229 {
1230         if (freefont && p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1231                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1232         p->fontdata = NULL;
1233         p->userfont = 0;
1234 }
1235
1236 static void set_vc_hi_font(struct vc_data *vc, bool set);
1237
1238 static void fbcon_deinit(struct vc_data *vc)
1239 {
1240         struct fbcon_display *p = &fb_display[vc->vc_num];
1241         struct fb_info *info;
1242         struct fbcon_ops *ops;
1243         int idx;
1244         bool free_font = true;
1245
1246         idx = con2fb_map[vc->vc_num];
1247
1248         if (idx == -1)
1249                 goto finished;
1250
1251         info = registered_fb[idx];
1252
1253         if (!info)
1254                 goto finished;
1255
1256         if (info->flags & FBINFO_MISC_FIRMWARE)
1257                 free_font = false;
1258         ops = info->fbcon_par;
1259
1260         if (!ops)
1261                 goto finished;
1262
1263         if (con_is_visible(vc))
1264                 fbcon_del_cursor_timer(info);
1265
1266         ops->flags &= ~FBCON_FLAGS_INIT;
1267 finished:
1268
1269         fbcon_free_font(p, free_font);
1270         if (free_font)
1271                 vc->vc_font.data = NULL;
1272
1273         if (vc->vc_hi_font_mask && vc->vc_screenbuf)
1274                 set_vc_hi_font(vc, false);
1275
1276         if (!con_is_bound(&fb_con))
1277                 fbcon_exit();
1278
1279         return;
1280 }
1281
1282 /* ====================================================================== */
1283
1284 /*  fbcon_XXX routines - interface used by the world
1285  *
1286  *  This system is now divided into two levels because of complications
1287  *  caused by hardware scrolling. Top level functions:
1288  *
1289  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1290  *
1291  *  handles y values in range [0, scr_height-1] that correspond to real
1292  *  screen positions. y_wrap shift means that first line of bitmap may be
1293  *  anywhere on this display. These functions convert lineoffsets to
1294  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1295  *
1296  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1297  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1298  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1299  *
1300  *  WARNING:
1301  *
1302  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1303  *  Implies should only really hardware scroll in rows. Only reason for
1304  *  restriction is simplicity & efficiency at the moment.
1305  */
1306
1307 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1308                         int width)
1309 {
1310         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1311         struct fbcon_ops *ops = info->fbcon_par;
1312
1313         struct fbcon_display *p = &fb_display[vc->vc_num];
1314         u_int y_break;
1315
1316         if (fbcon_is_inactive(vc, info))
1317                 return;
1318
1319         if (!height || !width)
1320                 return;
1321
1322         if (sy < vc->vc_top && vc->vc_top == logo_lines) {
1323                 vc->vc_top = 0;
1324                 /*
1325                  * If the font dimensions are not an integral of the display
1326                  * dimensions then the ops->clear below won't end up clearing
1327                  * the margins.  Call clear_margins here in case the logo
1328                  * bitmap stretched into the margin area.
1329                  */
1330                 fbcon_clear_margins(vc, 0);
1331         }
1332
1333         /* Split blits that cross physical y_wrap boundary */
1334
1335         y_break = p->vrows - p->yscroll;
1336         if (sy < y_break && sy + height - 1 >= y_break) {
1337                 u_int b = y_break - sy;
1338                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1339                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1340                                  width);
1341         } else
1342                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1343 }
1344
1345 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1346                         int count, int ypos, int xpos)
1347 {
1348         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1349         struct fbcon_display *p = &fb_display[vc->vc_num];
1350         struct fbcon_ops *ops = info->fbcon_par;
1351
1352         if (!fbcon_is_inactive(vc, info))
1353                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1354                            get_color(vc, info, scr_readw(s), 1),
1355                            get_color(vc, info, scr_readw(s), 0));
1356 }
1357
1358 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1359 {
1360         unsigned short chr;
1361
1362         scr_writew(c, &chr);
1363         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1364 }
1365
1366 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1367 {
1368         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1369         struct fbcon_ops *ops = info->fbcon_par;
1370
1371         if (!fbcon_is_inactive(vc, info))
1372                 ops->clear_margins(vc, info, margin_color, bottom_only);
1373 }
1374
1375 static void fbcon_cursor(struct vc_data *vc, int mode)
1376 {
1377         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1378         struct fbcon_ops *ops = info->fbcon_par;
1379         int y;
1380         int c = scr_readw((u16 *) vc->vc_pos);
1381
1382         ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
1383
1384         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1385                 return;
1386
1387         if (vc->vc_cursor_type & 0x10)
1388                 fbcon_del_cursor_timer(info);
1389         else
1390                 fbcon_add_cursor_timer(info);
1391
1392         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1393         if (mode & CM_SOFTBACK) {
1394                 mode &= ~CM_SOFTBACK;
1395                 y = softback_lines;
1396         } else {
1397                 if (softback_lines)
1398                         fbcon_set_origin(vc);
1399                 y = 0;
1400         }
1401
1402         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1403                     get_color(vc, info, c, 0));
1404 }
1405
1406 static int scrollback_phys_max = 0;
1407 static int scrollback_max = 0;
1408 static int scrollback_current = 0;
1409
1410 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1411                            int unit)
1412 {
1413         struct fbcon_display *p, *t;
1414         struct vc_data **default_mode, *vc;
1415         struct vc_data *svc;
1416         struct fbcon_ops *ops = info->fbcon_par;
1417         int rows, cols, charcnt = 256;
1418
1419         p = &fb_display[unit];
1420
1421         if (var_to_display(p, var, info))
1422                 return;
1423
1424         vc = vc_cons[unit].d;
1425
1426         if (!vc)
1427                 return;
1428
1429         default_mode = vc->vc_display_fg;
1430         svc = *default_mode;
1431         t = &fb_display[svc->vc_num];
1432
1433         if (!vc->vc_font.data) {
1434                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1435                 vc->vc_font.width = (*default_mode)->vc_font.width;
1436                 vc->vc_font.height = (*default_mode)->vc_font.height;
1437                 p->userfont = t->userfont;
1438                 if (p->userfont)
1439                         REFCOUNT(p->fontdata)++;
1440         }
1441         if (p->userfont)
1442                 charcnt = FNTCHARCNT(p->fontdata);
1443
1444         var->activate = FB_ACTIVATE_NOW;
1445         info->var.activate = var->activate;
1446         var->yoffset = info->var.yoffset;
1447         var->xoffset = info->var.xoffset;
1448         fb_set_var(info, var);
1449         ops->var = info->var;
1450         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1451         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1452         if (charcnt == 256) {
1453                 vc->vc_hi_font_mask = 0;
1454         } else {
1455                 vc->vc_hi_font_mask = 0x100;
1456                 if (vc->vc_can_do_color)
1457                         vc->vc_complement_mask <<= 1;
1458         }
1459
1460         if (!*svc->vc_uni_pagedir_loc)
1461                 con_set_default_unimap(svc);
1462         if (!*vc->vc_uni_pagedir_loc)
1463                 con_copy_unimap(vc, svc);
1464
1465         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1466         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1467         cols /= vc->vc_font.width;
1468         rows /= vc->vc_font.height;
1469         vc_resize(vc, cols, rows);
1470
1471         if (con_is_visible(vc)) {
1472                 update_screen(vc);
1473                 if (softback_buf)
1474                         fbcon_update_softback(vc);
1475         }
1476 }
1477
1478 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1479 {
1480         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1481         struct fbcon_ops *ops = info->fbcon_par;
1482         struct fbcon_display *p = &fb_display[vc->vc_num];
1483
1484         p->yscroll += count;
1485         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1486                 p->yscroll -= p->vrows;
1487         ops->var.xoffset = 0;
1488         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1489         ops->var.vmode |= FB_VMODE_YWRAP;
1490         ops->update_start(info);
1491         scrollback_max += count;
1492         if (scrollback_max > scrollback_phys_max)
1493                 scrollback_max = scrollback_phys_max;
1494         scrollback_current = 0;
1495 }
1496
1497 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1498 {
1499         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1500         struct fbcon_ops *ops = info->fbcon_par;
1501         struct fbcon_display *p = &fb_display[vc->vc_num];
1502
1503         p->yscroll -= count;
1504         if (p->yscroll < 0)     /* Deal with wrap */
1505                 p->yscroll += p->vrows;
1506         ops->var.xoffset = 0;
1507         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1508         ops->var.vmode |= FB_VMODE_YWRAP;
1509         ops->update_start(info);
1510         scrollback_max -= count;
1511         if (scrollback_max < 0)
1512                 scrollback_max = 0;
1513         scrollback_current = 0;
1514 }
1515
1516 static __inline__ void ypan_up(struct vc_data *vc, int count)
1517 {
1518         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1519         struct fbcon_display *p = &fb_display[vc->vc_num];
1520         struct fbcon_ops *ops = info->fbcon_par;
1521
1522         p->yscroll += count;
1523         if (p->yscroll > p->vrows - vc->vc_rows) {
1524                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1525                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1526                 p->yscroll -= p->vrows - vc->vc_rows;
1527         }
1528
1529         ops->var.xoffset = 0;
1530         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1531         ops->var.vmode &= ~FB_VMODE_YWRAP;
1532         ops->update_start(info);
1533         fbcon_clear_margins(vc, 1);
1534         scrollback_max += count;
1535         if (scrollback_max > scrollback_phys_max)
1536                 scrollback_max = scrollback_phys_max;
1537         scrollback_current = 0;
1538 }
1539
1540 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1541 {
1542         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1543         struct fbcon_ops *ops = info->fbcon_par;
1544         struct fbcon_display *p = &fb_display[vc->vc_num];
1545
1546         p->yscroll += count;
1547
1548         if (p->yscroll > p->vrows - vc->vc_rows) {
1549                 p->yscroll -= p->vrows - vc->vc_rows;
1550                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1551         }
1552
1553         ops->var.xoffset = 0;
1554         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1555         ops->var.vmode &= ~FB_VMODE_YWRAP;
1556         ops->update_start(info);
1557         fbcon_clear_margins(vc, 1);
1558         scrollback_max += count;
1559         if (scrollback_max > scrollback_phys_max)
1560                 scrollback_max = scrollback_phys_max;
1561         scrollback_current = 0;
1562 }
1563
1564 static __inline__ void ypan_down(struct vc_data *vc, int count)
1565 {
1566         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1567         struct fbcon_display *p = &fb_display[vc->vc_num];
1568         struct fbcon_ops *ops = info->fbcon_par;
1569
1570         p->yscroll -= count;
1571         if (p->yscroll < 0) {
1572                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1573                             0, vc->vc_rows, vc->vc_cols);
1574                 p->yscroll += p->vrows - vc->vc_rows;
1575         }
1576
1577         ops->var.xoffset = 0;
1578         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1579         ops->var.vmode &= ~FB_VMODE_YWRAP;
1580         ops->update_start(info);
1581         fbcon_clear_margins(vc, 1);
1582         scrollback_max -= count;
1583         if (scrollback_max < 0)
1584                 scrollback_max = 0;
1585         scrollback_current = 0;
1586 }
1587
1588 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1589 {
1590         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1591         struct fbcon_ops *ops = info->fbcon_par;
1592         struct fbcon_display *p = &fb_display[vc->vc_num];
1593
1594         p->yscroll -= count;
1595
1596         if (p->yscroll < 0) {
1597                 p->yscroll += p->vrows - vc->vc_rows;
1598                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1599         }
1600
1601         ops->var.xoffset = 0;
1602         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1603         ops->var.vmode &= ~FB_VMODE_YWRAP;
1604         ops->update_start(info);
1605         fbcon_clear_margins(vc, 1);
1606         scrollback_max -= count;
1607         if (scrollback_max < 0)
1608                 scrollback_max = 0;
1609         scrollback_current = 0;
1610 }
1611
1612 static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
1613                                   long delta)
1614 {
1615         int count = vc->vc_rows;
1616         unsigned short *d, *s;
1617         unsigned long n;
1618         int line = 0;
1619
1620         d = (u16 *) softback_curr;
1621         if (d == (u16 *) softback_in)
1622                 d = (u16 *) vc->vc_origin;
1623         n = softback_curr + delta * vc->vc_size_row;
1624         softback_lines -= delta;
1625         if (delta < 0) {
1626                 if (softback_curr < softback_top && n < softback_buf) {
1627                         n += softback_end - softback_buf;
1628                         if (n < softback_top) {
1629                                 softback_lines -=
1630                                     (softback_top - n) / vc->vc_size_row;
1631                                 n = softback_top;
1632                         }
1633                 } else if (softback_curr >= softback_top
1634                            && n < softback_top) {
1635                         softback_lines -=
1636                             (softback_top - n) / vc->vc_size_row;
1637                         n = softback_top;
1638                 }
1639         } else {
1640                 if (softback_curr > softback_in && n >= softback_end) {
1641                         n += softback_buf - softback_end;
1642                         if (n > softback_in) {
1643                                 n = softback_in;
1644                                 softback_lines = 0;
1645                         }
1646                 } else if (softback_curr <= softback_in && n > softback_in) {
1647                         n = softback_in;
1648                         softback_lines = 0;
1649                 }
1650         }
1651         if (n == softback_curr)
1652                 return;
1653         softback_curr = n;
1654         s = (u16 *) softback_curr;
1655         if (s == (u16 *) softback_in)
1656                 s = (u16 *) vc->vc_origin;
1657         while (count--) {
1658                 unsigned short *start;
1659                 unsigned short *le;
1660                 unsigned short c;
1661                 int x = 0;
1662                 unsigned short attr = 1;
1663
1664                 start = s;
1665                 le = advance_row(s, 1);
1666                 do {
1667                         c = scr_readw(s);
1668                         if (attr != (c & 0xff00)) {
1669                                 attr = c & 0xff00;
1670                                 if (s > start) {
1671                                         fbcon_putcs(vc, start, s - start,
1672                                                     line, x);
1673                                         x += s - start;
1674                                         start = s;
1675                                 }
1676                         }
1677                         if (c == scr_readw(d)) {
1678                                 if (s > start) {
1679                                         fbcon_putcs(vc, start, s - start,
1680                                                     line, x);
1681                                         x += s - start + 1;
1682                                         start = s + 1;
1683                                 } else {
1684                                         x++;
1685                                         start++;
1686                                 }
1687                         }
1688                         s++;
1689                         d++;
1690                 } while (s < le);
1691                 if (s > start)
1692                         fbcon_putcs(vc, start, s - start, line, x);
1693                 line++;
1694                 if (d == (u16 *) softback_end)
1695                         d = (u16 *) softback_buf;
1696                 if (d == (u16 *) softback_in)
1697                         d = (u16 *) vc->vc_origin;
1698                 if (s == (u16 *) softback_end)
1699                         s = (u16 *) softback_buf;
1700                 if (s == (u16 *) softback_in)
1701                         s = (u16 *) vc->vc_origin;
1702         }
1703 }
1704
1705 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
1706                               int line, int count, int dy)
1707 {
1708         unsigned short *s = (unsigned short *)
1709                 (vc->vc_origin + vc->vc_size_row * line);
1710
1711         while (count--) {
1712                 unsigned short *start = s;
1713                 unsigned short *le = advance_row(s, 1);
1714                 unsigned short c;
1715                 int x = 0;
1716                 unsigned short attr = 1;
1717
1718                 do {
1719                         c = scr_readw(s);
1720                         if (attr != (c & 0xff00)) {
1721                                 attr = c & 0xff00;
1722                                 if (s > start) {
1723                                         fbcon_putcs(vc, start, s - start,
1724                                                     dy, x);
1725                                         x += s - start;
1726                                         start = s;
1727                                 }
1728                         }
1729                         console_conditional_schedule();
1730                         s++;
1731                 } while (s < le);
1732                 if (s > start)
1733                         fbcon_putcs(vc, start, s - start, dy, x);
1734                 console_conditional_schedule();
1735                 dy++;
1736         }
1737 }
1738
1739 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1740                         struct fbcon_display *p, int line, int count, int ycount)
1741 {
1742         int offset = ycount * vc->vc_cols;
1743         unsigned short *d = (unsigned short *)
1744             (vc->vc_origin + vc->vc_size_row * line);
1745         unsigned short *s = d + offset;
1746         struct fbcon_ops *ops = info->fbcon_par;
1747
1748         while (count--) {
1749                 unsigned short *start = s;
1750                 unsigned short *le = advance_row(s, 1);
1751                 unsigned short c;
1752                 int x = 0;
1753
1754                 do {
1755                         c = scr_readw(s);
1756
1757                         if (c == scr_readw(d)) {
1758                                 if (s > start) {
1759                                         ops->bmove(vc, info, line + ycount, x,
1760                                                    line, x, 1, s-start);
1761                                         x += s - start + 1;
1762                                         start = s + 1;
1763                                 } else {
1764                                         x++;
1765                                         start++;
1766                                 }
1767                         }
1768
1769                         scr_writew(c, d);
1770                         console_conditional_schedule();
1771                         s++;
1772                         d++;
1773                 } while (s < le);
1774                 if (s > start)
1775                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1776                                    s-start);
1777                 console_conditional_schedule();
1778                 if (ycount > 0)
1779                         line++;
1780                 else {
1781                         line--;
1782                         /* NOTE: We subtract two lines from these pointers */
1783                         s -= vc->vc_size_row;
1784                         d -= vc->vc_size_row;
1785                 }
1786         }
1787 }
1788
1789 static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
1790                          int line, int count, int offset)
1791 {
1792         unsigned short *d = (unsigned short *)
1793             (vc->vc_origin + vc->vc_size_row * line);
1794         unsigned short *s = d + offset;
1795
1796         while (count--) {
1797                 unsigned short *start = s;
1798                 unsigned short *le = advance_row(s, 1);
1799                 unsigned short c;
1800                 int x = 0;
1801                 unsigned short attr = 1;
1802
1803                 do {
1804                         c = scr_readw(s);
1805                         if (attr != (c & 0xff00)) {
1806                                 attr = c & 0xff00;
1807                                 if (s > start) {
1808                                         fbcon_putcs(vc, start, s - start,
1809                                                     line, x);
1810                                         x += s - start;
1811                                         start = s;
1812                                 }
1813                         }
1814                         if (c == scr_readw(d)) {
1815                                 if (s > start) {
1816                                         fbcon_putcs(vc, start, s - start,
1817                                                      line, x);
1818                                         x += s - start + 1;
1819                                         start = s + 1;
1820                                 } else {
1821                                         x++;
1822                                         start++;
1823                                 }
1824                         }
1825                         scr_writew(c, d);
1826                         console_conditional_schedule();
1827                         s++;
1828                         d++;
1829                 } while (s < le);
1830                 if (s > start)
1831                         fbcon_putcs(vc, start, s - start, line, x);
1832                 console_conditional_schedule();
1833                 if (offset > 0)
1834                         line++;
1835                 else {
1836                         line--;
1837                         /* NOTE: We subtract two lines from these pointers */
1838                         s -= vc->vc_size_row;
1839                         d -= vc->vc_size_row;
1840                 }
1841         }
1842 }
1843
1844 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1845                                        int count)
1846 {
1847         unsigned short *p;
1848
1849         if (vc->vc_num != fg_console)
1850                 return;
1851         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1852
1853         while (count) {
1854                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1855                 count--;
1856                 p = advance_row(p, 1);
1857                 softback_in += vc->vc_size_row;
1858                 if (softback_in == softback_end)
1859                         softback_in = softback_buf;
1860                 if (softback_in == softback_top) {
1861                         softback_top += vc->vc_size_row;
1862                         if (softback_top == softback_end)
1863                                 softback_top = softback_buf;
1864                 }
1865         }
1866         softback_curr = softback_in;
1867 }
1868
1869 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
1870                 enum con_scroll dir, unsigned int count)
1871 {
1872         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1873         struct fbcon_display *p = &fb_display[vc->vc_num];
1874         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1875
1876         if (fbcon_is_inactive(vc, info))
1877                 return true;
1878
1879         fbcon_cursor(vc, CM_ERASE);
1880
1881         /*
1882          * ++Geert: Only use ywrap/ypan if the console is in text mode
1883          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1884          *           whole screen (prevents flicker).
1885          */
1886
1887         switch (dir) {
1888         case SM_UP:
1889                 if (count > vc->vc_rows)        /* Maximum realistic size */
1890                         count = vc->vc_rows;
1891                 if (softback_top)
1892                         fbcon_softback_note(vc, t, count);
1893                 if (logo_shown >= 0)
1894                         goto redraw_up;
1895                 switch (p->scrollmode) {
1896                 case SCROLL_MOVE:
1897                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1898                                      count);
1899                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1900                         scr_memsetw((unsigned short *) (vc->vc_origin +
1901                                                         vc->vc_size_row *
1902                                                         (b - count)),
1903                                     vc->vc_video_erase_char,
1904                                     vc->vc_size_row * count);
1905                         return true;
1906                         break;
1907
1908                 case SCROLL_WRAP_MOVE:
1909                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1910                                 if (t > 0)
1911                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1912                                                     vc->vc_cols);
1913                                 ywrap_up(vc, count);
1914                                 if (vc->vc_rows - b > 0)
1915                                         fbcon_bmove(vc, b - count, 0, b, 0,
1916                                                     vc->vc_rows - b,
1917                                                     vc->vc_cols);
1918                         } else if (info->flags & FBINFO_READS_FAST)
1919                                 fbcon_bmove(vc, t + count, 0, t, 0,
1920                                             b - t - count, vc->vc_cols);
1921                         else
1922                                 goto redraw_up;
1923                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1924                         break;
1925
1926                 case SCROLL_PAN_REDRAW:
1927                         if ((p->yscroll + count <=
1928                              2 * (p->vrows - vc->vc_rows))
1929                             && ((!scroll_partial && (b - t == vc->vc_rows))
1930                                 || (scroll_partial
1931                                     && (b - t - count >
1932                                         3 * vc->vc_rows >> 2)))) {
1933                                 if (t > 0)
1934                                         fbcon_redraw_move(vc, p, 0, t, count);
1935                                 ypan_up_redraw(vc, t, count);
1936                                 if (vc->vc_rows - b > 0)
1937                                         fbcon_redraw_move(vc, p, b,
1938                                                           vc->vc_rows - b, b);
1939                         } else
1940                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1941                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1942                         break;
1943
1944                 case SCROLL_PAN_MOVE:
1945                         if ((p->yscroll + count <=
1946                              2 * (p->vrows - vc->vc_rows))
1947                             && ((!scroll_partial && (b - t == vc->vc_rows))
1948                                 || (scroll_partial
1949                                     && (b - t - count >
1950                                         3 * vc->vc_rows >> 2)))) {
1951                                 if (t > 0)
1952                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1953                                                     vc->vc_cols);
1954                                 ypan_up(vc, count);
1955                                 if (vc->vc_rows - b > 0)
1956                                         fbcon_bmove(vc, b - count, 0, b, 0,
1957                                                     vc->vc_rows - b,
1958                                                     vc->vc_cols);
1959                         } else if (info->flags & FBINFO_READS_FAST)
1960                                 fbcon_bmove(vc, t + count, 0, t, 0,
1961                                             b - t - count, vc->vc_cols);
1962                         else
1963                                 goto redraw_up;
1964                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1965                         break;
1966
1967                 case SCROLL_REDRAW:
1968                       redraw_up:
1969                         fbcon_redraw(vc, p, t, b - t - count,
1970                                      count * vc->vc_cols);
1971                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1972                         scr_memsetw((unsigned short *) (vc->vc_origin +
1973                                                         vc->vc_size_row *
1974                                                         (b - count)),
1975                                     vc->vc_video_erase_char,
1976                                     vc->vc_size_row * count);
1977                         return true;
1978                 }
1979                 break;
1980
1981         case SM_DOWN:
1982                 if (count > vc->vc_rows)        /* Maximum realistic size */
1983                         count = vc->vc_rows;
1984                 if (logo_shown >= 0)
1985                         goto redraw_down;
1986                 switch (p->scrollmode) {
1987                 case SCROLL_MOVE:
1988                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1989                                      -count);
1990                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1991                         scr_memsetw((unsigned short *) (vc->vc_origin +
1992                                                         vc->vc_size_row *
1993                                                         t),
1994                                     vc->vc_video_erase_char,
1995                                     vc->vc_size_row * count);
1996                         return true;
1997                         break;
1998
1999                 case SCROLL_WRAP_MOVE:
2000                         if (b - t - count > 3 * vc->vc_rows >> 2) {
2001                                 if (vc->vc_rows - b > 0)
2002                                         fbcon_bmove(vc, b, 0, b - count, 0,
2003                                                     vc->vc_rows - b,
2004                                                     vc->vc_cols);
2005                                 ywrap_down(vc, count);
2006                                 if (t > 0)
2007                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2008                                                     vc->vc_cols);
2009                         } else if (info->flags & FBINFO_READS_FAST)
2010                                 fbcon_bmove(vc, t, 0, t + count, 0,
2011                                             b - t - count, vc->vc_cols);
2012                         else
2013                                 goto redraw_down;
2014                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2015                         break;
2016
2017                 case SCROLL_PAN_MOVE:
2018                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2019                             && ((!scroll_partial && (b - t == vc->vc_rows))
2020                                 || (scroll_partial
2021                                     && (b - t - count >
2022                                         3 * vc->vc_rows >> 2)))) {
2023                                 if (vc->vc_rows - b > 0)
2024                                         fbcon_bmove(vc, b, 0, b - count, 0,
2025                                                     vc->vc_rows - b,
2026                                                     vc->vc_cols);
2027                                 ypan_down(vc, count);
2028                                 if (t > 0)
2029                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2030                                                     vc->vc_cols);
2031                         } else if (info->flags & FBINFO_READS_FAST)
2032                                 fbcon_bmove(vc, t, 0, t + count, 0,
2033                                             b - t - count, vc->vc_cols);
2034                         else
2035                                 goto redraw_down;
2036                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2037                         break;
2038
2039                 case SCROLL_PAN_REDRAW:
2040                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2041                             && ((!scroll_partial && (b - t == vc->vc_rows))
2042                                 || (scroll_partial
2043                                     && (b - t - count >
2044                                         3 * vc->vc_rows >> 2)))) {
2045                                 if (vc->vc_rows - b > 0)
2046                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2047                                                           b - count);
2048                                 ypan_down_redraw(vc, t, count);
2049                                 if (t > 0)
2050                                         fbcon_redraw_move(vc, p, count, t, 0);
2051                         } else
2052                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2053                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2054                         break;
2055
2056                 case SCROLL_REDRAW:
2057                       redraw_down:
2058                         fbcon_redraw(vc, p, b - 1, b - t - count,
2059                                      -count * vc->vc_cols);
2060                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2061                         scr_memsetw((unsigned short *) (vc->vc_origin +
2062                                                         vc->vc_size_row *
2063                                                         t),
2064                                     vc->vc_video_erase_char,
2065                                     vc->vc_size_row * count);
2066                         return true;
2067                 }
2068         }
2069         return false;
2070 }
2071
2072
2073 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2074                         int height, int width)
2075 {
2076         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2077         struct fbcon_display *p = &fb_display[vc->vc_num];
2078
2079         if (fbcon_is_inactive(vc, info))
2080                 return;
2081
2082         if (!width || !height)
2083                 return;
2084
2085         /*  Split blits that cross physical y_wrap case.
2086          *  Pathological case involves 4 blits, better to use recursive
2087          *  code rather than unrolled case
2088          *
2089          *  Recursive invocations don't need to erase the cursor over and
2090          *  over again, so we use fbcon_bmove_rec()
2091          */
2092         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2093                         p->vrows - p->yscroll);
2094 }
2095
2096 static void fbcon_bmove_rec(struct vc_data *vc, struct fbcon_display *p, int sy, int sx,
2097                             int dy, int dx, int height, int width, u_int y_break)
2098 {
2099         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2100         struct fbcon_ops *ops = info->fbcon_par;
2101         u_int b;
2102
2103         if (sy < y_break && sy + height > y_break) {
2104                 b = y_break - sy;
2105                 if (dy < sy) {  /* Avoid trashing self */
2106                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2107                                         y_break);
2108                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2109                                         height - b, width, y_break);
2110                 } else {
2111                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2112                                         height - b, width, y_break);
2113                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2114                                         y_break);
2115                 }
2116                 return;
2117         }
2118
2119         if (dy < y_break && dy + height > y_break) {
2120                 b = y_break - dy;
2121                 if (dy < sy) {  /* Avoid trashing self */
2122                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2123                                         y_break);
2124                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2125                                         height - b, width, y_break);
2126                 } else {
2127                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2128                                         height - b, width, y_break);
2129                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2130                                         y_break);
2131                 }
2132                 return;
2133         }
2134         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2135                    height, width);
2136 }
2137
2138 static void updatescrollmode(struct fbcon_display *p,
2139                                         struct fb_info *info,
2140                                         struct vc_data *vc)
2141 {
2142         struct fbcon_ops *ops = info->fbcon_par;
2143         int fh = vc->vc_font.height;
2144         int cap = info->flags;
2145         u16 t = 0;
2146         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2147                                   info->fix.xpanstep);
2148         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2149         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2150         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2151                                    info->var.xres_virtual);
2152         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2153                 divides(ypan, vc->vc_font.height) && vyres > yres;
2154         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2155                 divides(ywrap, vc->vc_font.height) &&
2156                 divides(vc->vc_font.height, vyres) &&
2157                 divides(vc->vc_font.height, yres);
2158         int reading_fast = cap & FBINFO_READS_FAST;
2159         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2160                 !(cap & FBINFO_HWACCEL_DISABLED);
2161         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2162                 !(cap & FBINFO_HWACCEL_DISABLED);
2163
2164         p->vrows = vyres/fh;
2165         if (yres > (fh * (vc->vc_rows + 1)))
2166                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2167         if ((yres % fh) && (vyres % fh < yres % fh))
2168                 p->vrows--;
2169
2170         if (good_wrap || good_pan) {
2171                 if (reading_fast || fast_copyarea)
2172                         p->scrollmode = good_wrap ?
2173                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2174                 else
2175                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2176                                 SCROLL_PAN_REDRAW;
2177         } else {
2178                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2179                         p->scrollmode = SCROLL_MOVE;
2180                 else
2181                         p->scrollmode = SCROLL_REDRAW;
2182         }
2183 }
2184
2185 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2186                         unsigned int height, unsigned int user)
2187 {
2188         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2189         struct fbcon_ops *ops = info->fbcon_par;
2190         struct fbcon_display *p = &fb_display[vc->vc_num];
2191         struct fb_var_screeninfo var = info->var;
2192         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2193
2194         virt_w = FBCON_SWAP(ops->rotate, width, height);
2195         virt_h = FBCON_SWAP(ops->rotate, height, width);
2196         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2197                                  vc->vc_font.height);
2198         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2199                                  vc->vc_font.width);
2200         var.xres = virt_w * virt_fw;
2201         var.yres = virt_h * virt_fh;
2202         x_diff = info->var.xres - var.xres;
2203         y_diff = info->var.yres - var.yres;
2204         if (x_diff < 0 || x_diff > virt_fw ||
2205             y_diff < 0 || y_diff > virt_fh) {
2206                 const struct fb_videomode *mode;
2207
2208                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2209                 mode = fb_find_best_mode(&var, &info->modelist);
2210                 if (mode == NULL)
2211                         return -EINVAL;
2212                 display_to_var(&var, p);
2213                 fb_videomode_to_var(&var, mode);
2214
2215                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2216                         return -EINVAL;
2217
2218                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2219                 if (con_is_visible(vc)) {
2220                         var.activate = FB_ACTIVATE_NOW |
2221                                 FB_ACTIVATE_FORCE;
2222                         fb_set_var(info, &var);
2223                 }
2224                 var_to_display(p, &info->var, info);
2225                 ops->var = info->var;
2226         }
2227         updatescrollmode(p, info, vc);
2228         return 0;
2229 }
2230
2231 static int fbcon_switch(struct vc_data *vc)
2232 {
2233         struct fb_info *info, *old_info = NULL;
2234         struct fbcon_ops *ops;
2235         struct fbcon_display *p = &fb_display[vc->vc_num];
2236         struct fb_var_screeninfo var;
2237         int i, ret, prev_console, charcnt = 256;
2238
2239         info = registered_fb[con2fb_map[vc->vc_num]];
2240         ops = info->fbcon_par;
2241
2242         if (softback_top) {
2243                 if (softback_lines)
2244                         fbcon_set_origin(vc);
2245                 softback_top = softback_curr = softback_in = softback_buf;
2246                 softback_lines = 0;
2247                 fbcon_update_softback(vc);
2248         }
2249
2250         if (logo_shown >= 0) {
2251                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2252
2253                 if (conp2->vc_top == logo_lines
2254                     && conp2->vc_bottom == conp2->vc_rows)
2255                         conp2->vc_top = 0;
2256                 logo_shown = FBCON_LOGO_CANSHOW;
2257         }
2258
2259         prev_console = ops->currcon;
2260         if (prev_console != -1)
2261                 old_info = registered_fb[con2fb_map[prev_console]];
2262         /*
2263          * FIXME: If we have multiple fbdev's loaded, we need to
2264          * update all info->currcon.  Perhaps, we can place this
2265          * in a centralized structure, but this might break some
2266          * drivers.
2267          *
2268          * info->currcon = vc->vc_num;
2269          */
2270         for_each_registered_fb(i) {
2271                 if (registered_fb[i]->fbcon_par) {
2272                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2273
2274                         o->currcon = vc->vc_num;
2275                 }
2276         }
2277         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2278         display_to_var(&var, p);
2279         var.activate = FB_ACTIVATE_NOW;
2280
2281         /*
2282          * make sure we don't unnecessarily trip the memcmp()
2283          * in fb_set_var()
2284          */
2285         info->var.activate = var.activate;
2286         var.vmode |= info->var.vmode & ~FB_VMODE_MASK;
2287         fb_set_var(info, &var);
2288         ops->var = info->var;
2289
2290         if (old_info != NULL && (old_info != info ||
2291                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2292                 if (info->fbops->fb_set_par) {
2293                         ret = info->fbops->fb_set_par(info);
2294
2295                         if (ret)
2296                                 printk(KERN_ERR "fbcon_switch: detected "
2297                                         "unhandled fb_set_par error, "
2298                                         "error code %d\n", ret);
2299                 }
2300
2301                 if (old_info != info)
2302                         fbcon_del_cursor_timer(old_info);
2303         }
2304
2305         if (fbcon_is_inactive(vc, info) ||
2306             ops->blank_state != FB_BLANK_UNBLANK)
2307                 fbcon_del_cursor_timer(info);
2308         else
2309                 fbcon_add_cursor_timer(info);
2310
2311         set_blitting_type(vc, info);
2312         ops->cursor_reset = 1;
2313
2314         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2315                 ops->rotate = FB_ROTATE_UR;
2316                 set_blitting_type(vc, info);
2317         }
2318
2319         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2320         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2321
2322         if (p->userfont)
2323                 charcnt = FNTCHARCNT(vc->vc_font.data);
2324
2325         if (charcnt > 256)
2326                 vc->vc_complement_mask <<= 1;
2327
2328         updatescrollmode(p, info, vc);
2329
2330         switch (p->scrollmode) {
2331         case SCROLL_WRAP_MOVE:
2332                 scrollback_phys_max = p->vrows - vc->vc_rows;
2333                 break;
2334         case SCROLL_PAN_MOVE:
2335         case SCROLL_PAN_REDRAW:
2336                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2337                 if (scrollback_phys_max < 0)
2338                         scrollback_phys_max = 0;
2339                 break;
2340         default:
2341                 scrollback_phys_max = 0;
2342                 break;
2343         }
2344
2345         scrollback_max = 0;
2346         scrollback_current = 0;
2347
2348         if (!fbcon_is_inactive(vc, info)) {
2349             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2350             ops->update_start(info);
2351         }
2352
2353         fbcon_set_palette(vc, color_table);
2354         fbcon_clear_margins(vc, 0);
2355
2356         if (logo_shown == FBCON_LOGO_DRAW) {
2357
2358                 logo_shown = fg_console;
2359                 /* This is protected above by initmem_freed */
2360                 fb_show_logo(info, ops->rotate);
2361                 update_region(vc,
2362                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2363                               vc->vc_size_row * (vc->vc_bottom -
2364                                                  vc->vc_top) / 2);
2365                 return 0;
2366         }
2367         return 1;
2368 }
2369
2370 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2371                                 int blank)
2372 {
2373         if (blank) {
2374                 unsigned short charmask = vc->vc_hi_font_mask ?
2375                         0x1ff : 0xff;
2376                 unsigned short oldc;
2377
2378                 oldc = vc->vc_video_erase_char;
2379                 vc->vc_video_erase_char &= charmask;
2380                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2381                 vc->vc_video_erase_char = oldc;
2382         }
2383 }
2384
2385 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2386 {
2387         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2388         struct fbcon_ops *ops = info->fbcon_par;
2389
2390         if (mode_switch) {
2391                 struct fb_var_screeninfo var = info->var;
2392
2393                 ops->graphics = 1;
2394
2395                 if (!blank) {
2396                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2397                         fb_set_var(info, &var);
2398                         ops->graphics = 0;
2399                         ops->var = info->var;
2400                 }
2401         }
2402
2403         if (!fbcon_is_inactive(vc, info)) {
2404                 if (ops->blank_state != blank) {
2405                         ops->blank_state = blank;
2406                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2407                         ops->cursor_flash = (!blank);
2408
2409                         if (fb_blank(info, blank))
2410                                 fbcon_generic_blank(vc, info, blank);
2411                 }
2412
2413                 if (!blank)
2414                         update_screen(vc);
2415         }
2416
2417         if (mode_switch || fbcon_is_inactive(vc, info) ||
2418             ops->blank_state != FB_BLANK_UNBLANK)
2419                 fbcon_del_cursor_timer(info);
2420         else
2421                 fbcon_add_cursor_timer(info);
2422
2423         return 0;
2424 }
2425
2426 static int fbcon_debug_enter(struct vc_data *vc)
2427 {
2428         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2429         struct fbcon_ops *ops = info->fbcon_par;
2430
2431         ops->save_graphics = ops->graphics;
2432         ops->graphics = 0;
2433         if (info->fbops->fb_debug_enter)
2434                 info->fbops->fb_debug_enter(info);
2435         fbcon_set_palette(vc, color_table);
2436         return 0;
2437 }
2438
2439 static int fbcon_debug_leave(struct vc_data *vc)
2440 {
2441         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2442         struct fbcon_ops *ops = info->fbcon_par;
2443
2444         ops->graphics = ops->save_graphics;
2445         if (info->fbops->fb_debug_leave)
2446                 info->fbops->fb_debug_leave(info);
2447         return 0;
2448 }
2449
2450 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2451 {
2452         u8 *fontdata = vc->vc_font.data;
2453         u8 *data = font->data;
2454         int i, j;
2455
2456         font->width = vc->vc_font.width;
2457         font->height = vc->vc_font.height;
2458         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2459         if (!font->data)
2460                 return 0;
2461
2462         if (font->width <= 8) {
2463                 j = vc->vc_font.height;
2464                 for (i = 0; i < font->charcount; i++) {
2465                         memcpy(data, fontdata, j);
2466                         memset(data + j, 0, 32 - j);
2467                         data += 32;
2468                         fontdata += j;
2469                 }
2470         } else if (font->width <= 16) {
2471                 j = vc->vc_font.height * 2;
2472                 for (i = 0; i < font->charcount; i++) {
2473                         memcpy(data, fontdata, j);
2474                         memset(data + j, 0, 64 - j);
2475                         data += 64;
2476                         fontdata += j;
2477                 }
2478         } else if (font->width <= 24) {
2479                 for (i = 0; i < font->charcount; i++) {
2480                         for (j = 0; j < vc->vc_font.height; j++) {
2481                                 *data++ = fontdata[0];
2482                                 *data++ = fontdata[1];
2483                                 *data++ = fontdata[2];
2484                                 fontdata += sizeof(u32);
2485                         }
2486                         memset(data, 0, 3 * (32 - j));
2487                         data += 3 * (32 - j);
2488                 }
2489         } else {
2490                 j = vc->vc_font.height * 4;
2491                 for (i = 0; i < font->charcount; i++) {
2492                         memcpy(data, fontdata, j);
2493                         memset(data + j, 0, 128 - j);
2494                         data += 128;
2495                         fontdata += j;
2496                 }
2497         }
2498         return 0;
2499 }
2500
2501 /* set/clear vc_hi_font_mask and update vc attrs accordingly */
2502 static void set_vc_hi_font(struct vc_data *vc, bool set)
2503 {
2504         if (!set) {
2505                 vc->vc_hi_font_mask = 0;
2506                 if (vc->vc_can_do_color) {
2507                         vc->vc_complement_mask >>= 1;
2508                         vc->vc_s_complement_mask >>= 1;
2509                 }
2510
2511                 /* ++Edmund: reorder the attribute bits */
2512                 if (vc->vc_can_do_color) {
2513                         unsigned short *cp =
2514                             (unsigned short *) vc->vc_origin;
2515                         int count = vc->vc_screenbuf_size / 2;
2516                         unsigned short c;
2517                         for (; count > 0; count--, cp++) {
2518                                 c = scr_readw(cp);
2519                                 scr_writew(((c & 0xfe00) >> 1) |
2520                                            (c & 0xff), cp);
2521                         }
2522                         c = vc->vc_video_erase_char;
2523                         vc->vc_video_erase_char =
2524                             ((c & 0xfe00) >> 1) | (c & 0xff);
2525                         vc->vc_attr >>= 1;
2526                 }
2527         } else {
2528                 vc->vc_hi_font_mask = 0x100;
2529                 if (vc->vc_can_do_color) {
2530                         vc->vc_complement_mask <<= 1;
2531                         vc->vc_s_complement_mask <<= 1;
2532                 }
2533
2534                 /* ++Edmund: reorder the attribute bits */
2535                 {
2536                         unsigned short *cp =
2537                             (unsigned short *) vc->vc_origin;
2538                         int count = vc->vc_screenbuf_size / 2;
2539                         unsigned short c;
2540                         for (; count > 0; count--, cp++) {
2541                                 unsigned short newc;
2542                                 c = scr_readw(cp);
2543                                 if (vc->vc_can_do_color)
2544                                         newc =
2545                                             ((c & 0xff00) << 1) | (c &
2546                                                                    0xff);
2547                                 else
2548                                         newc = c & ~0x100;
2549                                 scr_writew(newc, cp);
2550                         }
2551                         c = vc->vc_video_erase_char;
2552                         if (vc->vc_can_do_color) {
2553                                 vc->vc_video_erase_char =
2554                                     ((c & 0xff00) << 1) | (c & 0xff);
2555                                 vc->vc_attr <<= 1;
2556                         } else
2557                                 vc->vc_video_erase_char = c & ~0x100;
2558                 }
2559         }
2560 }
2561
2562 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2563                              const u8 * data, int userfont)
2564 {
2565         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2566         struct fbcon_ops *ops = info->fbcon_par;
2567         struct fbcon_display *p = &fb_display[vc->vc_num];
2568         int resize;
2569         int cnt;
2570         char *old_data = NULL;
2571
2572         if (con_is_visible(vc) && softback_lines)
2573                 fbcon_set_origin(vc);
2574
2575         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2576         if (p->userfont)
2577                 old_data = vc->vc_font.data;
2578         if (userfont)
2579                 cnt = FNTCHARCNT(data);
2580         else
2581                 cnt = 256;
2582         vc->vc_font.data = (void *)(p->fontdata = data);
2583         if ((p->userfont = userfont))
2584                 REFCOUNT(data)++;
2585         vc->vc_font.width = w;
2586         vc->vc_font.height = h;
2587         if (vc->vc_hi_font_mask && cnt == 256)
2588                 set_vc_hi_font(vc, false);
2589         else if (!vc->vc_hi_font_mask && cnt == 512)
2590                 set_vc_hi_font(vc, true);
2591
2592         if (resize) {
2593                 int cols, rows;
2594
2595                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2596                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2597                 cols /= w;
2598                 rows /= h;
2599                 vc_resize(vc, cols, rows);
2600                 if (con_is_visible(vc) && softback_buf)
2601                         fbcon_update_softback(vc);
2602         } else if (con_is_visible(vc)
2603                    && vc->vc_mode == KD_TEXT) {
2604                 fbcon_clear_margins(vc, 0);
2605                 update_screen(vc);
2606         }
2607
2608         if (old_data && (--REFCOUNT(old_data) == 0))
2609                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2610         return 0;
2611 }
2612
2613 static int fbcon_copy_font(struct vc_data *vc, int con)
2614 {
2615         struct fbcon_display *od = &fb_display[con];
2616         struct console_font *f = &vc->vc_font;
2617
2618         if (od->fontdata == f->data)
2619                 return 0;       /* already the same font... */
2620         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2621 }
2622
2623 /*
2624  *  User asked to set font; we are guaranteed that
2625  *      a) width and height are in range 1..32
2626  *      b) charcount does not exceed 512
2627  *  but lets not assume that, since someone might someday want to use larger
2628  *  fonts. And charcount of 512 is small for unicode support.
2629  *
2630  *  However, user space gives the font in 32 rows , regardless of
2631  *  actual font height. So a new API is needed if support for larger fonts
2632  *  is ever implemented.
2633  */
2634
2635 static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
2636                           unsigned int flags)
2637 {
2638         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2639         unsigned charcount = font->charcount;
2640         int w = font->width;
2641         int h = font->height;
2642         int size;
2643         int i, csum;
2644         u8 *new_data, *data = font->data;
2645         int pitch = (font->width+7) >> 3;
2646
2647         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2648          * If not this check should be changed to charcount < 256 */
2649         if (charcount != 256 && charcount != 512)
2650                 return -EINVAL;
2651
2652         /* Make sure drawing engine can handle the font */
2653         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2654             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2655                 return -EINVAL;
2656
2657         /* Make sure driver can handle the font length */
2658         if (fbcon_invalid_charcount(info, charcount))
2659                 return -EINVAL;
2660
2661         size = h * pitch * charcount;
2662
2663         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2664
2665         if (!new_data)
2666                 return -ENOMEM;
2667
2668         new_data += FONT_EXTRA_WORDS * sizeof(int);
2669         FNTSIZE(new_data) = size;
2670         FNTCHARCNT(new_data) = charcount;
2671         REFCOUNT(new_data) = 0; /* usage counter */
2672         for (i=0; i< charcount; i++) {
2673                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2674         }
2675
2676         /* Since linux has a nice crc32 function use it for counting font
2677          * checksums. */
2678         csum = crc32(0, new_data, size);
2679
2680         FNTSUM(new_data) = csum;
2681         /* Check if the same font is on some other console already */
2682         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2683                 struct vc_data *tmp = vc_cons[i].d;
2684
2685                 if (fb_display[i].userfont &&
2686                     fb_display[i].fontdata &&
2687                     FNTSUM(fb_display[i].fontdata) == csum &&
2688                     FNTSIZE(fb_display[i].fontdata) == size &&
2689                     tmp->vc_font.width == w &&
2690                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2691                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2692                         new_data = (u8 *)fb_display[i].fontdata;
2693                         break;
2694                 }
2695         }
2696         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2697 }
2698
2699 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2700 {
2701         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2702         const struct font_desc *f;
2703
2704         if (!name)
2705                 f = get_default_font(info->var.xres, info->var.yres,
2706                                      info->pixmap.blit_x, info->pixmap.blit_y);
2707         else if (!(f = find_font(name)))
2708                 return -ENOENT;
2709
2710         font->width = f->width;
2711         font->height = f->height;
2712         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2713 }
2714
2715 static u16 palette_red[16];
2716 static u16 palette_green[16];
2717 static u16 palette_blue[16];
2718
2719 static struct fb_cmap palette_cmap = {
2720         0, 16, palette_red, palette_green, palette_blue, NULL
2721 };
2722
2723 static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
2724 {
2725         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2726         int i, j, k, depth;
2727         u8 val;
2728
2729         if (fbcon_is_inactive(vc, info))
2730                 return;
2731
2732         if (!con_is_visible(vc))
2733                 return;
2734
2735         depth = fb_get_color_depth(&info->var, &info->fix);
2736         if (depth > 3) {
2737                 for (i = j = 0; i < 16; i++) {
2738                         k = table[i];
2739                         val = vc->vc_palette[j++];
2740                         palette_red[k] = (val << 8) | val;
2741                         val = vc->vc_palette[j++];
2742                         palette_green[k] = (val << 8) | val;
2743                         val = vc->vc_palette[j++];
2744                         palette_blue[k] = (val << 8) | val;
2745                 }
2746                 palette_cmap.len = 16;
2747                 palette_cmap.start = 0;
2748         /*
2749          * If framebuffer is capable of less than 16 colors,
2750          * use default palette of fbcon.
2751          */
2752         } else
2753                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2754
2755         fb_set_cmap(&palette_cmap, info);
2756 }
2757
2758 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2759 {
2760         unsigned long p;
2761         int line;
2762
2763         if (vc->vc_num != fg_console || !softback_lines)
2764                 return (u16 *) (vc->vc_origin + offset);
2765         line = offset / vc->vc_size_row;
2766         if (line >= softback_lines)
2767                 return (u16 *) (vc->vc_origin + offset -
2768                                 softback_lines * vc->vc_size_row);
2769         p = softback_curr + offset;
2770         if (p >= softback_end)
2771                 p += softback_buf - softback_end;
2772         return (u16 *) p;
2773 }
2774
2775 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2776                                  int *px, int *py)
2777 {
2778         unsigned long ret;
2779         int x, y;
2780
2781         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2782                 unsigned long offset = (pos - vc->vc_origin) / 2;
2783
2784                 x = offset % vc->vc_cols;
2785                 y = offset / vc->vc_cols;
2786                 if (vc->vc_num == fg_console)
2787                         y += softback_lines;
2788                 ret = pos + (vc->vc_cols - x) * 2;
2789         } else if (vc->vc_num == fg_console && softback_lines) {
2790                 unsigned long offset = pos - softback_curr;
2791
2792                 if (pos < softback_curr)
2793                         offset += softback_end - softback_buf;
2794                 offset /= 2;
2795                 x = offset % vc->vc_cols;
2796                 y = offset / vc->vc_cols;
2797                 ret = pos + (vc->vc_cols - x) * 2;
2798                 if (ret == softback_end)
2799                         ret = softback_buf;
2800                 if (ret == softback_in)
2801                         ret = vc->vc_origin;
2802         } else {
2803                 /* Should not happen */
2804                 x = y = 0;
2805                 ret = vc->vc_origin;
2806         }
2807         if (px)
2808                 *px = x;
2809         if (py)
2810                 *py = y;
2811         return ret;
2812 }
2813
2814 /* As we might be inside of softback, we may work with non-contiguous buffer,
2815    that's why we have to use a separate routine. */
2816 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2817 {
2818         while (cnt--) {
2819                 u16 a = scr_readw(p);
2820                 if (!vc->vc_can_do_color)
2821                         a ^= 0x0800;
2822                 else if (vc->vc_hi_font_mask == 0x100)
2823                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2824                             (((a) & 0x0e00) << 4);
2825                 else
2826                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2827                             (((a) & 0x0700) << 4);
2828                 scr_writew(a, p++);
2829                 if (p == (u16 *) softback_end)
2830                         p = (u16 *) softback_buf;
2831                 if (p == (u16 *) softback_in)
2832                         p = (u16 *) vc->vc_origin;
2833         }
2834 }
2835
2836 static void fbcon_scrolldelta(struct vc_data *vc, int lines)
2837 {
2838         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2839         struct fbcon_ops *ops = info->fbcon_par;
2840         struct fbcon_display *disp = &fb_display[fg_console];
2841         int offset, limit, scrollback_old;
2842
2843         if (softback_top) {
2844                 if (vc->vc_num != fg_console)
2845                         return;
2846                 if (vc->vc_mode != KD_TEXT || !lines)
2847                         return;
2848                 if (logo_shown >= 0) {
2849                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2850
2851                         if (conp2->vc_top == logo_lines
2852                             && conp2->vc_bottom == conp2->vc_rows)
2853                                 conp2->vc_top = 0;
2854                         if (logo_shown == vc->vc_num) {
2855                                 unsigned long p, q;
2856                                 int i;
2857
2858                                 p = softback_in;
2859                                 q = vc->vc_origin +
2860                                     logo_lines * vc->vc_size_row;
2861                                 for (i = 0; i < logo_lines; i++) {
2862                                         if (p == softback_top)
2863                                                 break;
2864                                         if (p == softback_buf)
2865                                                 p = softback_end;
2866                                         p -= vc->vc_size_row;
2867                                         q -= vc->vc_size_row;
2868                                         scr_memcpyw((u16 *) q, (u16 *) p,
2869                                                     vc->vc_size_row);
2870                                 }
2871                                 softback_in = softback_curr = p;
2872                                 update_region(vc, vc->vc_origin,
2873                                               logo_lines * vc->vc_cols);
2874                         }
2875                         logo_shown = FBCON_LOGO_CANSHOW;
2876                 }
2877                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2878                 fbcon_redraw_softback(vc, disp, lines);
2879                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2880                 return;
2881         }
2882
2883         if (!scrollback_phys_max)
2884                 return;
2885
2886         scrollback_old = scrollback_current;
2887         scrollback_current -= lines;
2888         if (scrollback_current < 0)
2889                 scrollback_current = 0;
2890         else if (scrollback_current > scrollback_max)
2891                 scrollback_current = scrollback_max;
2892         if (scrollback_current == scrollback_old)
2893                 return;
2894
2895         if (fbcon_is_inactive(vc, info))
2896                 return;
2897
2898         fbcon_cursor(vc, CM_ERASE);
2899
2900         offset = disp->yscroll - scrollback_current;
2901         limit = disp->vrows;
2902         switch (disp->scrollmode) {
2903         case SCROLL_WRAP_MOVE:
2904                 info->var.vmode |= FB_VMODE_YWRAP;
2905                 break;
2906         case SCROLL_PAN_MOVE:
2907         case SCROLL_PAN_REDRAW:
2908                 limit -= vc->vc_rows;
2909                 info->var.vmode &= ~FB_VMODE_YWRAP;
2910                 break;
2911         }
2912         if (offset < 0)
2913                 offset += limit;
2914         else if (offset >= limit)
2915                 offset -= limit;
2916
2917         ops->var.xoffset = 0;
2918         ops->var.yoffset = offset * vc->vc_font.height;
2919         ops->update_start(info);
2920
2921         if (!scrollback_current)
2922                 fbcon_cursor(vc, CM_DRAW);
2923 }
2924
2925 static int fbcon_set_origin(struct vc_data *vc)
2926 {
2927         if (softback_lines)
2928                 fbcon_scrolldelta(vc, softback_lines);
2929         return 0;
2930 }
2931
2932 void fbcon_suspended(struct fb_info *info)
2933 {
2934         struct vc_data *vc = NULL;
2935         struct fbcon_ops *ops = info->fbcon_par;
2936
2937         if (!ops || ops->currcon < 0)
2938                 return;
2939         vc = vc_cons[ops->currcon].d;
2940
2941         /* Clear cursor, restore saved data */
2942         fbcon_cursor(vc, CM_ERASE);
2943 }
2944
2945 void fbcon_resumed(struct fb_info *info)
2946 {
2947         struct vc_data *vc;
2948         struct fbcon_ops *ops = info->fbcon_par;
2949
2950         if (!ops || ops->currcon < 0)
2951                 return;
2952         vc = vc_cons[ops->currcon].d;
2953
2954         update_screen(vc);
2955 }
2956
2957 static void fbcon_modechanged(struct fb_info *info)
2958 {
2959         struct fbcon_ops *ops = info->fbcon_par;
2960         struct vc_data *vc;
2961         struct fbcon_display *p;
2962         int rows, cols;
2963
2964         if (!ops || ops->currcon < 0)
2965                 return;
2966         vc = vc_cons[ops->currcon].d;
2967         if (vc->vc_mode != KD_TEXT ||
2968             registered_fb[con2fb_map[ops->currcon]] != info)
2969                 return;
2970
2971         p = &fb_display[vc->vc_num];
2972         set_blitting_type(vc, info);
2973
2974         if (con_is_visible(vc)) {
2975                 var_to_display(p, &info->var, info);
2976                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2977                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2978                 cols /= vc->vc_font.width;
2979                 rows /= vc->vc_font.height;
2980                 vc_resize(vc, cols, rows);
2981                 updatescrollmode(p, info, vc);
2982                 scrollback_max = 0;
2983                 scrollback_current = 0;
2984
2985                 if (!fbcon_is_inactive(vc, info)) {
2986                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2987                     ops->update_start(info);
2988                 }
2989
2990                 fbcon_set_palette(vc, color_table);
2991                 update_screen(vc);
2992                 if (softback_buf)
2993                         fbcon_update_softback(vc);
2994         }
2995 }
2996
2997 static void fbcon_set_all_vcs(struct fb_info *info)
2998 {
2999         struct fbcon_ops *ops = info->fbcon_par;
3000         struct vc_data *vc;
3001         struct fbcon_display *p;
3002         int i, rows, cols, fg = -1;
3003
3004         if (!ops || ops->currcon < 0)
3005                 return;
3006
3007         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3008                 vc = vc_cons[i].d;
3009                 if (!vc || vc->vc_mode != KD_TEXT ||
3010                     registered_fb[con2fb_map[i]] != info)
3011                         continue;
3012
3013                 if (con_is_visible(vc)) {
3014                         fg = i;
3015                         continue;
3016                 }
3017
3018                 p = &fb_display[vc->vc_num];
3019                 set_blitting_type(vc, info);
3020                 var_to_display(p, &info->var, info);
3021                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
3022                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
3023                 cols /= vc->vc_font.width;
3024                 rows /= vc->vc_font.height;
3025                 vc_resize(vc, cols, rows);
3026         }
3027
3028         if (fg != -1)
3029                 fbcon_modechanged(info);
3030 }
3031
3032
3033 void fbcon_update_vcs(struct fb_info *info, bool all)
3034 {
3035         if (all)
3036                 fbcon_set_all_vcs(info);
3037         else
3038                 fbcon_modechanged(info);
3039 }
3040 EXPORT_SYMBOL(fbcon_update_vcs);
3041
3042 int fbcon_mode_deleted(struct fb_info *info,
3043                        struct fb_videomode *mode)
3044 {
3045         struct fb_info *fb_info;
3046         struct fbcon_display *p;
3047         int i, j, found = 0;
3048
3049         /* before deletion, ensure that mode is not in use */
3050         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3051                 j = con2fb_map[i];
3052                 if (j == -1)
3053                         continue;
3054                 fb_info = registered_fb[j];
3055                 if (fb_info != info)
3056                         continue;
3057                 p = &fb_display[i];
3058                 if (!p || !p->mode)
3059                         continue;
3060                 if (fb_mode_is_equal(p->mode, mode)) {
3061                         found = 1;
3062                         break;
3063                 }
3064         }
3065         return found;
3066 }
3067
3068 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3069 static void fbcon_unbind(void)
3070 {
3071         int ret;
3072
3073         ret = do_unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3074                                 fbcon_is_default);
3075
3076         if (!ret)
3077                 fbcon_has_console_bind = 0;
3078 }
3079 #else
3080 static inline void fbcon_unbind(void) {}
3081 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3082
3083 /* called with console_lock held */
3084 void fbcon_fb_unbind(struct fb_info *info)
3085 {
3086         int i, new_idx = -1, ret = 0;
3087         int idx = info->node;
3088
3089         WARN_CONSOLE_UNLOCKED();
3090
3091         if (!fbcon_has_console_bind)
3092                 return;
3093
3094         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3095                 if (con2fb_map[i] != idx &&
3096                     con2fb_map[i] != -1) {
3097                         new_idx = con2fb_map[i];
3098                         break;
3099                 }
3100         }
3101
3102         if (new_idx != -1) {
3103                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3104                         if (con2fb_map[i] == idx)
3105                                 set_con2fb_map(i, new_idx, 0);
3106                 }
3107         } else {
3108                 struct fb_info *info = registered_fb[idx];
3109
3110                 /* This is sort of like set_con2fb_map, except it maps
3111                  * the consoles to no device and then releases the
3112                  * oldinfo to free memory and cancel the cursor blink
3113                  * timer. I can imagine this just becoming part of
3114                  * set_con2fb_map where new_idx is -1
3115                  */
3116                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3117                         if (con2fb_map[i] == idx) {
3118                                 con2fb_map[i] = -1;
3119                                 if (!search_fb_in_map(idx)) {
3120                                         ret = con2fb_release_oldinfo(vc_cons[i].d,
3121                                                                      info, NULL, i,
3122                                                                      idx, 0);
3123                                         if (ret) {
3124                                                 con2fb_map[i] = idx;
3125                                                 return;
3126                                         }
3127                                 }
3128                         }
3129                 }
3130                 fbcon_unbind();
3131         }
3132 }
3133
3134 /* called with console_lock held */
3135 void fbcon_fb_unregistered(struct fb_info *info)
3136 {
3137         int i, idx;
3138
3139         WARN_CONSOLE_UNLOCKED();
3140
3141         if (deferred_takeover)
3142                 return;
3143
3144         idx = info->node;
3145         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3146                 if (con2fb_map[i] == idx)
3147                         con2fb_map[i] = -1;
3148         }
3149
3150         if (idx == info_idx) {
3151                 info_idx = -1;
3152
3153                 for_each_registered_fb(i) {
3154                         info_idx = i;
3155                         break;
3156                 }
3157         }
3158
3159         if (info_idx != -1) {
3160                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3161                         if (con2fb_map[i] == -1)
3162                                 con2fb_map[i] = info_idx;
3163                 }
3164         }
3165
3166         if (primary_device == idx)
3167                 primary_device = -1;
3168
3169         if (!num_registered_fb)
3170                 do_unregister_con_driver(&fb_con);
3171 }
3172
3173 void fbcon_remap_all(struct fb_info *info)
3174 {
3175         int i, idx = info->node;
3176
3177         console_lock();
3178         if (deferred_takeover) {
3179                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3180                         con2fb_map_boot[i] = idx;
3181                 fbcon_map_override();
3182                 console_unlock();
3183                 return;
3184         }
3185
3186         for (i = first_fb_vc; i <= last_fb_vc; i++)
3187                 set_con2fb_map(i, idx, 0);
3188
3189         if (con_is_bound(&fb_con)) {
3190                 printk(KERN_INFO "fbcon: Remapping primary device, "
3191                        "fb%i, to tty %i-%i\n", idx,
3192                        first_fb_vc + 1, last_fb_vc + 1);
3193                 info_idx = idx;
3194         }
3195         console_unlock();
3196 }
3197
3198 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3199 static void fbcon_select_primary(struct fb_info *info)
3200 {
3201         if (!map_override && primary_device == -1 &&
3202             fb_is_primary_device(info)) {
3203                 int i;
3204
3205                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3206                        info->fix.id, info->node);
3207                 primary_device = info->node;
3208
3209                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3210                         con2fb_map_boot[i] = primary_device;
3211
3212                 if (con_is_bound(&fb_con)) {
3213                         printk(KERN_INFO "fbcon: Remapping primary device, "
3214                                "fb%i, to tty %i-%i\n", info->node,
3215                                first_fb_vc + 1, last_fb_vc + 1);
3216                         info_idx = primary_device;
3217                 }
3218         }
3219
3220 }
3221 #else
3222 static inline void fbcon_select_primary(struct fb_info *info)
3223 {
3224         return;
3225 }
3226 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3227
3228 /* called with console_lock held */
3229 int fbcon_fb_registered(struct fb_info *info)
3230 {
3231         int ret = 0, i, idx;
3232
3233         WARN_CONSOLE_UNLOCKED();
3234
3235         idx = info->node;
3236         fbcon_select_primary(info);
3237
3238         if (deferred_takeover) {
3239                 pr_info("fbcon: Deferring console take-over\n");
3240                 return 0;
3241         }
3242
3243         if (info_idx == -1) {
3244                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3245                         if (con2fb_map_boot[i] == idx) {
3246                                 info_idx = idx;
3247                                 break;
3248                         }
3249                 }
3250
3251                 if (info_idx != -1)
3252                         ret = do_fbcon_takeover(1);
3253         } else {
3254                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3255                         if (con2fb_map_boot[i] == idx)
3256                                 set_con2fb_map(i, idx, 0);
3257                 }
3258         }
3259
3260         return ret;
3261 }
3262
3263 void fbcon_fb_blanked(struct fb_info *info, int blank)
3264 {
3265         struct fbcon_ops *ops = info->fbcon_par;
3266         struct vc_data *vc;
3267
3268         if (!ops || ops->currcon < 0)
3269                 return;
3270
3271         vc = vc_cons[ops->currcon].d;
3272         if (vc->vc_mode != KD_TEXT ||
3273                         registered_fb[con2fb_map[ops->currcon]] != info)
3274                 return;
3275
3276         if (con_is_visible(vc)) {
3277                 if (blank)
3278                         do_blank_screen(0);
3279                 else
3280                         do_unblank_screen(0);
3281         }
3282         ops->blank_state = blank;
3283 }
3284
3285 void fbcon_new_modelist(struct fb_info *info)
3286 {
3287         int i;
3288         struct vc_data *vc;
3289         struct fb_var_screeninfo var;
3290         const struct fb_videomode *mode;
3291
3292         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3293                 if (registered_fb[con2fb_map[i]] != info)
3294                         continue;
3295                 if (!fb_display[i].mode)
3296                         continue;
3297                 vc = vc_cons[i].d;
3298                 display_to_var(&var, &fb_display[i]);
3299                 mode = fb_find_nearest_mode(fb_display[i].mode,
3300                                             &info->modelist);
3301                 fb_videomode_to_var(&var, mode);
3302                 fbcon_set_disp(info, &var, vc->vc_num);
3303         }
3304 }
3305
3306 void fbcon_get_requirement(struct fb_info *info,
3307                            struct fb_blit_caps *caps)
3308 {
3309         struct vc_data *vc;
3310         struct fbcon_display *p;
3311
3312         if (caps->flags) {
3313                 int i, charcnt;
3314
3315                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3316                         vc = vc_cons[i].d;
3317                         if (vc && vc->vc_mode == KD_TEXT &&
3318                             info->node == con2fb_map[i]) {
3319                                 p = &fb_display[i];
3320                                 caps->x |= 1 << (vc->vc_font.width - 1);
3321                                 caps->y |= 1 << (vc->vc_font.height - 1);
3322                                 charcnt = (p->userfont) ?
3323                                         FNTCHARCNT(p->fontdata) : 256;
3324                                 if (caps->len < charcnt)
3325                                         caps->len = charcnt;
3326                         }
3327                 }
3328         } else {
3329                 vc = vc_cons[fg_console].d;
3330
3331                 if (vc && vc->vc_mode == KD_TEXT &&
3332                     info->node == con2fb_map[fg_console]) {
3333                         p = &fb_display[fg_console];
3334                         caps->x = 1 << (vc->vc_font.width - 1);
3335                         caps->y = 1 << (vc->vc_font.height - 1);
3336                         caps->len = (p->userfont) ?
3337                                 FNTCHARCNT(p->fontdata) : 256;
3338                 }
3339         }
3340 }
3341
3342 int fbcon_set_con2fb_map_ioctl(void __user *argp)
3343 {
3344         struct fb_con2fbmap con2fb;
3345         int ret;
3346
3347         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3348                 return -EFAULT;
3349         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3350                 return -EINVAL;
3351         if (con2fb.framebuffer >= FB_MAX)
3352                 return -EINVAL;
3353         if (!registered_fb[con2fb.framebuffer])
3354                 request_module("fb%d", con2fb.framebuffer);
3355         if (!registered_fb[con2fb.framebuffer]) {
3356                 return -EINVAL;
3357         }
3358
3359         console_lock();
3360         ret = set_con2fb_map(con2fb.console - 1,
3361                              con2fb.framebuffer, 1);
3362         console_unlock();
3363
3364         return ret;
3365 }
3366
3367 int fbcon_get_con2fb_map_ioctl(void __user *argp)
3368 {
3369         struct fb_con2fbmap con2fb;
3370
3371         if (copy_from_user(&con2fb, argp, sizeof(con2fb)))
3372                 return -EFAULT;
3373         if (con2fb.console < 1 || con2fb.console > MAX_NR_CONSOLES)
3374                 return -EINVAL;
3375
3376         console_lock();
3377         con2fb.framebuffer = con2fb_map[con2fb.console - 1];
3378         console_unlock();
3379
3380         return copy_to_user(argp, &con2fb, sizeof(con2fb)) ? -EFAULT : 0;
3381 }
3382
3383 /*
3384  *  The console `switch' structure for the frame buffer based console
3385  */
3386
3387 static const struct consw fb_con = {
3388         .owner                  = THIS_MODULE,
3389         .con_startup            = fbcon_startup,
3390         .con_init               = fbcon_init,
3391         .con_deinit             = fbcon_deinit,
3392         .con_clear              = fbcon_clear,
3393         .con_putc               = fbcon_putc,
3394         .con_putcs              = fbcon_putcs,
3395         .con_cursor             = fbcon_cursor,
3396         .con_scroll             = fbcon_scroll,
3397         .con_switch             = fbcon_switch,
3398         .con_blank              = fbcon_blank,
3399         .con_font_set           = fbcon_set_font,
3400         .con_font_get           = fbcon_get_font,
3401         .con_font_default       = fbcon_set_def_font,
3402         .con_font_copy          = fbcon_copy_font,
3403         .con_set_palette        = fbcon_set_palette,
3404         .con_scrolldelta        = fbcon_scrolldelta,
3405         .con_set_origin         = fbcon_set_origin,
3406         .con_invert_region      = fbcon_invert_region,
3407         .con_screen_pos         = fbcon_screen_pos,
3408         .con_getxy              = fbcon_getxy,
3409         .con_resize             = fbcon_resize,
3410         .con_debug_enter        = fbcon_debug_enter,
3411         .con_debug_leave        = fbcon_debug_leave,
3412 };
3413
3414 static ssize_t store_rotate(struct device *device,
3415                             struct device_attribute *attr, const char *buf,
3416                             size_t count)
3417 {
3418         struct fb_info *info;
3419         int rotate, idx;
3420         char **last = NULL;
3421
3422         console_lock();
3423         idx = con2fb_map[fg_console];
3424
3425         if (idx == -1 || registered_fb[idx] == NULL)
3426                 goto err;
3427
3428         info = registered_fb[idx];
3429         rotate = simple_strtoul(buf, last, 0);
3430         fbcon_rotate(info, rotate);
3431 err:
3432         console_unlock();
3433         return count;
3434 }
3435
3436 static ssize_t store_rotate_all(struct device *device,
3437                                 struct device_attribute *attr,const char *buf,
3438                                 size_t count)
3439 {
3440         struct fb_info *info;
3441         int rotate, idx;
3442         char **last = NULL;
3443
3444         console_lock();
3445         idx = con2fb_map[fg_console];
3446
3447         if (idx == -1 || registered_fb[idx] == NULL)
3448                 goto err;
3449
3450         info = registered_fb[idx];
3451         rotate = simple_strtoul(buf, last, 0);
3452         fbcon_rotate_all(info, rotate);
3453 err:
3454         console_unlock();
3455         return count;
3456 }
3457
3458 static ssize_t show_rotate(struct device *device,
3459                            struct device_attribute *attr,char *buf)
3460 {
3461         struct fb_info *info;
3462         int rotate = 0, idx;
3463
3464         console_lock();
3465         idx = con2fb_map[fg_console];
3466
3467         if (idx == -1 || registered_fb[idx] == NULL)
3468                 goto err;
3469
3470         info = registered_fb[idx];
3471         rotate = fbcon_get_rotate(info);
3472 err:
3473         console_unlock();
3474         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3475 }
3476
3477 static ssize_t show_cursor_blink(struct device *device,
3478                                  struct device_attribute *attr, char *buf)
3479 {
3480         struct fb_info *info;
3481         struct fbcon_ops *ops;
3482         int idx, blink = -1;
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         ops = info->fbcon_par;
3492
3493         if (!ops)
3494                 goto err;
3495
3496         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3497 err:
3498         console_unlock();
3499         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3500 }
3501
3502 static ssize_t store_cursor_blink(struct device *device,
3503                                   struct device_attribute *attr,
3504                                   const char *buf, size_t count)
3505 {
3506         struct fb_info *info;
3507         int blink, idx;
3508         char **last = NULL;
3509
3510         console_lock();
3511         idx = con2fb_map[fg_console];
3512
3513         if (idx == -1 || registered_fb[idx] == NULL)
3514                 goto err;
3515
3516         info = registered_fb[idx];
3517
3518         if (!info->fbcon_par)
3519                 goto err;
3520
3521         blink = simple_strtoul(buf, last, 0);
3522
3523         if (blink) {
3524                 fbcon_cursor_noblink = 0;
3525                 fbcon_add_cursor_timer(info);
3526         } else {
3527                 fbcon_cursor_noblink = 1;
3528                 fbcon_del_cursor_timer(info);
3529         }
3530
3531 err:
3532         console_unlock();
3533         return count;
3534 }
3535
3536 static struct device_attribute device_attrs[] = {
3537         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3538         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3539         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3540                store_cursor_blink),
3541 };
3542
3543 static int fbcon_init_device(void)
3544 {
3545         int i, error = 0;
3546
3547         fbcon_has_sysfs = 1;
3548
3549         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3550                 error = device_create_file(fbcon_device, &device_attrs[i]);
3551
3552                 if (error)
3553                         break;
3554         }
3555
3556         if (error) {
3557                 while (--i >= 0)
3558                         device_remove_file(fbcon_device, &device_attrs[i]);
3559
3560                 fbcon_has_sysfs = 0;
3561         }
3562
3563         return 0;
3564 }
3565
3566 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3567 static void fbcon_register_existing_fbs(struct work_struct *work)
3568 {
3569         int i;
3570
3571         console_lock();
3572
3573         for_each_registered_fb(i)
3574                 fbcon_fb_registered(registered_fb[i]);
3575
3576         console_unlock();
3577 }
3578
3579 static struct notifier_block fbcon_output_nb;
3580 static DECLARE_WORK(fbcon_deferred_takeover_work, fbcon_register_existing_fbs);
3581
3582 static int fbcon_output_notifier(struct notifier_block *nb,
3583                                  unsigned long action, void *data)
3584 {
3585         WARN_CONSOLE_UNLOCKED();
3586
3587         pr_info("fbcon: Taking over console\n");
3588
3589         dummycon_unregister_output_notifier(&fbcon_output_nb);
3590         deferred_takeover = false;
3591         logo_shown = FBCON_LOGO_DONTSHOW;
3592
3593         /* We may get called in atomic context */
3594         schedule_work(&fbcon_deferred_takeover_work);
3595
3596         return NOTIFY_OK;
3597 }
3598 #endif
3599
3600 static void fbcon_start(void)
3601 {
3602         WARN_CONSOLE_UNLOCKED();
3603
3604 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3605         if (conswitchp != &dummy_con)
3606                 deferred_takeover = false;
3607
3608         if (deferred_takeover) {
3609                 fbcon_output_nb.notifier_call = fbcon_output_notifier;
3610                 dummycon_register_output_notifier(&fbcon_output_nb);
3611                 return;
3612         }
3613 #endif
3614
3615         if (num_registered_fb) {
3616                 int i;
3617
3618                 for_each_registered_fb(i) {
3619                         info_idx = i;
3620                         break;
3621                 }
3622
3623                 do_fbcon_takeover(0);
3624         }
3625 }
3626
3627 static void fbcon_exit(void)
3628 {
3629         struct fb_info *info;
3630         int i, j, mapped;
3631
3632 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER
3633         if (deferred_takeover) {
3634                 dummycon_unregister_output_notifier(&fbcon_output_nb);
3635                 deferred_takeover = false;
3636         }
3637 #endif
3638
3639         kvfree((void *)softback_buf);
3640         softback_buf = 0UL;
3641
3642         for_each_registered_fb(i) {
3643                 int pending = 0;
3644
3645                 mapped = 0;
3646                 info = registered_fb[i];
3647
3648                 if (info->queue.func)
3649                         pending = cancel_work_sync(&info->queue);
3650                 DPRINTK("fbcon: %s pending work\n", (pending ? "canceled" :
3651                         "no"));
3652
3653                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3654                         if (con2fb_map[j] == i) {
3655                                 mapped = 1;
3656                                 con2fb_map[j] = -1;
3657                         }
3658                 }
3659
3660                 if (mapped) {
3661                         if (info->fbops->fb_release)
3662                                 info->fbops->fb_release(info, 0);
3663                         module_put(info->fbops->owner);
3664
3665                         if (info->fbcon_par) {
3666                                 struct fbcon_ops *ops = info->fbcon_par;
3667
3668                                 fbcon_del_cursor_timer(info);
3669                                 kfree(ops->cursor_src);
3670                                 kfree(ops->cursor_state.mask);
3671                                 kfree(info->fbcon_par);
3672                                 info->fbcon_par = NULL;
3673                         }
3674
3675                         if (info->queue.func == fb_flashcursor)
3676                                 info->queue.func = NULL;
3677                 }
3678         }
3679 }
3680
3681 void __init fb_console_init(void)
3682 {
3683         int i;
3684
3685         console_lock();
3686         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), NULL,
3687                                      "fbcon");
3688
3689         if (IS_ERR(fbcon_device)) {
3690                 printk(KERN_WARNING "Unable to create device "
3691                        "for fbcon; errno = %ld\n",
3692                        PTR_ERR(fbcon_device));
3693                 fbcon_device = NULL;
3694         } else
3695                 fbcon_init_device();
3696
3697         for (i = 0; i < MAX_NR_CONSOLES; i++)
3698                 con2fb_map[i] = -1;
3699
3700         fbcon_start();
3701         console_unlock();
3702 }
3703
3704 #ifdef MODULE
3705
3706 static void __exit fbcon_deinit_device(void)
3707 {
3708         int i;
3709
3710         if (fbcon_has_sysfs) {
3711                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3712                         device_remove_file(fbcon_device, &device_attrs[i]);
3713
3714                 fbcon_has_sysfs = 0;
3715         }
3716 }
3717
3718 void __exit fb_console_exit(void)
3719 {
3720         console_lock();
3721         fbcon_deinit_device();
3722         device_destroy(fb_class, MKDEV(0, 0));
3723         fbcon_exit();
3724         do_unregister_con_driver(&fb_con);
3725         console_unlock();
3726 }
3727 #endif