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   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/vt_kern.h>
  72 #include <linux/selection.h>
  73 #include <linux/font.h>
  74 #include <linux/smp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/crc32.h> /* For counting font checksums */
  78 #include <asm/fb.h>
  79 #include <asm/irq.h>
  80 #include <asm/system.h>
  81 #ifdef CONFIG_ATARI
  82 #include <asm/atariints.h>
  83 #endif
  84 #ifdef CONFIG_MAC
  85 #include <asm/macints.h>
  86 #endif
  87 #if defined(__mc68000__)
  88 #include <asm/machdep.h>
  89 #include <asm/setup.h>
  90 #endif
  91
  92 #include "fbcon.h"
  93
  94 #ifdef FBCONDEBUG
  95 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
  96 #else
  97 #  define DPRINTK(fmt, args...)
  98 #endif
  99
 100 enum {
 101         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 102         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 103         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 104 };
 105
 106 static struct display fb_display[MAX_NR_CONSOLES];
 107
 108 static signed char con2fb_map[MAX_NR_CONSOLES];
 109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 110 #ifndef MODULE
 111 static int logo_height;
 112 #endif
 113 static int logo_lines;
 114 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 115    enums.  */
 116 static int logo_shown = FBCON_LOGO_CANSHOW;
 117 /* Software scrollback */
 118 static int fbcon_softback_size = 32768;
 119 static unsigned long softback_buf, softback_curr;
 120 static unsigned long softback_in;
 121 static unsigned long softback_top, softback_end;
 122 static int softback_lines;
 123 /* console mappings */
 124 static int first_fb_vc;
 125 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 126 static int fbcon_is_default = 1;
 127 static int fbcon_has_exited;
 128 static int primary_device = -1;
 129
 130 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
 131 static int map_override;
 132
 133 static inline void fbcon_map_override(void)
 134 {
 135         map_override = 1;
 136 }
 137 #else
 138 static inline void fbcon_map_override(void)
 139 {
 140 }
 141 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY */
 142
 143 /* font data */
 144 static char fontname[40];
 145
 146 /* current fb_info */
 147 static int info_idx = -1;
 148
 149 /* console rotation */
 150 static int initial_rotation;
 151 static int fbcon_has_sysfs;
 152
 153 static const struct consw fb_con;
 154
 155 #define CM_SOFTBACK     (8)
 156
 157 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 158
 159 static int fbcon_set_origin(struct vc_data *);
 160
 161 #define CURSOR_DRAW_DELAY               (1)
 162
 163 /* # VBL ints between cursor state changes */
 164 #define ATARI_CURSOR_BLINK_RATE         (42)
 165 #define MAC_CURSOR_BLINK_RATE           (32)
 166 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 167
 168 static int vbl_cursor_cnt;
 169 static int fbcon_cursor_noblink;
 170
 171 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 172
 173 /*
 174  *  Interface used by the world
 175  */
 176
 177 static const char *fbcon_startup(void);
 178 static void fbcon_init(struct vc_data *vc, int init);
 179 static void fbcon_deinit(struct vc_data *vc);
 180 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 181                         int width);
 182 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 183 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 184                         int count, int ypos, int xpos);
 185 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 186 static void fbcon_cursor(struct vc_data *vc, int mode);
 187 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 188                         int count);
 189 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 190                         int height, int width);
 191 static int fbcon_switch(struct vc_data *vc);
 192 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 193 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 194 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 195
 196 /*
 197  *  Internal routines
 198  */
 199 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 200 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 201 static __inline__ void ypan_up(struct vc_data *vc, int count);
 202 static __inline__ void ypan_down(struct vc_data *vc, int count);
 203 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 204                             int dy, int dx, int height, int width, u_int y_break);
 205 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 206                            int unit);
 207 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 208                               int line, int count, int dy);
 209 static void fbcon_modechanged(struct fb_info *info);
 210 static void fbcon_set_all_vcs(struct fb_info *info);
 211 static void fbcon_start(void);
 212 static void fbcon_exit(void);
 213 static struct device *fbcon_device;
 214
 215 #ifdef CONFIG_MAC
 216 /*
 217  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 218  */
 219 static int vbl_detected;
 220
 221 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 222 {
 223         vbl_detected++;
 224         return IRQ_HANDLED;
 225 }
 226 #endif
 227
 228 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 229 static inline void fbcon_set_rotation(struct fb_info *info)
 230 {
 231         struct fbcon_ops *ops = info->fbcon_par;
 232
 233         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 234             ops->p->con_rotate < 4)
 235                 ops->rotate = ops->p->con_rotate;
 236         else
 237                 ops->rotate = 0;
 238 }
 239
 240 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 241 {
 242         struct fbcon_ops *ops= info->fbcon_par;
 243         struct fb_info *fb_info;
 244
 245         if (!ops || ops->currcon == -1)
 246                 return;
 247
 248         fb_info = registered_fb[con2fb_map[ops->currcon]];
 249
 250         if (info == fb_info) {
 251                 struct display *p = &fb_display[ops->currcon];
 252
 253                 if (rotate < 4)
 254                         p->con_rotate = rotate;
 255                 else
 256                         p->con_rotate = 0;
 257
 258                 fbcon_modechanged(info);
 259         }
 260 }
 261
 262 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 263 {
 264         struct fbcon_ops *ops = info->fbcon_par;
 265         struct vc_data *vc;
 266         struct display *p;
 267         int i;
 268
 269         if (!ops || ops->currcon < 0 || rotate > 3)
 270                 return;
 271
 272         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 273                 vc = vc_cons[i].d;
 274                 if (!vc || vc->vc_mode != KD_TEXT ||
 275                     registered_fb[con2fb_map[i]] != info)
 276                         continue;
 277
 278                 p = &fb_display[vc->vc_num];
 279                 p->con_rotate = rotate;
 280         }
 281
 282         fbcon_set_all_vcs(info);
 283 }
 284 #else
 285 static inline void fbcon_set_rotation(struct fb_info *info)
 286 {
 287         struct fbcon_ops *ops = info->fbcon_par;
 288
 289         ops->rotate = FB_ROTATE_UR;
 290 }
 291
 292 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 293 {
 294         return;
 295 }
 296
 297 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 298 {
 299         return;
 300 }
 301 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 302
 303 static int fbcon_get_rotate(struct fb_info *info)
 304 {
 305         struct fbcon_ops *ops = info->fbcon_par;
 306
 307         return (ops) ? ops->rotate : 0;
 308 }
 309
 310 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 311 {
 312         struct fbcon_ops *ops = info->fbcon_par;
 313
 314         return (info->state != FBINFO_STATE_RUNNING ||
 315                 vc->vc_mode != KD_TEXT || ops->graphics);
 316 }
 317
 318 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 319               u16 c, int is_fg)
 320 {
 321         int depth = fb_get_color_depth(&info->var, &info->fix);
 322         int color = 0;
 323
 324         if (console_blanked) {
 325                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 326
 327                 c = vc->vc_video_erase_char & charmask;
 328         }
 329
 330         if (depth != 1)
 331                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 332                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 333
 334         switch (depth) {
 335         case 1:
 336         {
 337                 int col = mono_col(info);
 338                 /* 0 or 1 */
 339                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 340                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 341
 342                 if (console_blanked)
 343                         fg = bg;
 344
 345                 color = (is_fg) ? fg : bg;
 346                 break;
 347         }
 348         case 2:
 349                 /*
 350                  * Scale down 16-colors to 4 colors. Default 4-color palette
 351                  * is grayscale. However, simply dividing the values by 4
 352                  * will not work, as colors 1, 2 and 3 will be scaled-down
 353                  * to zero rendering them invisible.  So empirically convert
 354                  * colors to a sane 4-level grayscale.
 355                  */
 356                 switch (color) {
 357                 case 0:
 358                         color = 0; /* black */
 359                         break;
 360                 case 1 ... 6:
 361                         color = 2; /* white */
 362                         break;
 363                 case 7 ... 8:
 364                         color = 1; /* gray */
 365                         break;
 366                 default:
 367                         color = 3; /* intense white */
 368                         break;
 369                 }
 370                 break;
 371         case 3:
 372                 /*
 373                  * Last 8 entries of default 16-color palette is a more intense
 374                  * version of the first 8 (i.e., same chrominance, different
 375                  * luminance).
 376                  */
 377                 color &= 7;
 378                 break;
 379         }
 380
 381
 382         return color;
 383 }
 384
 385 static void fbcon_update_softback(struct vc_data *vc)
 386 {
 387         int l = fbcon_softback_size / vc->vc_size_row;
 388
 389         if (l > 5)
 390                 softback_end = softback_buf + l * vc->vc_size_row;
 391         else
 392                 /* Smaller scrollback makes no sense, and 0 would screw
 393                    the operation totally */
 394                 softback_top = 0;
 395 }
 396
 397 static void fb_flashcursor(struct work_struct *work)
 398 {
 399         struct fb_info *info = container_of(work, struct fb_info, queue);
 400         struct fbcon_ops *ops = info->fbcon_par;
 401         struct display *p;
 402         struct vc_data *vc = NULL;
 403         int c;
 404         int mode;
 405
 406         acquire_console_sem();
 407         if (ops && ops->currcon != -1)
 408                 vc = vc_cons[ops->currcon].d;
 409
 410         if (!vc || !CON_IS_VISIBLE(vc) ||
 411             registered_fb[con2fb_map[vc->vc_num]] != info ||
 412             vc->vc_deccm != 1) {
 413                 release_console_sem();
 414                 return;
 415         }
 416
 417         p = &fb_display[vc->vc_num];
 418         c = scr_readw((u16 *) vc->vc_pos);
 419         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 420                 CM_ERASE : CM_DRAW;
 421         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 422                     get_color(vc, info, c, 0));
 423         release_console_sem();
 424 }
 425
 426 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 427 static int cursor_blink_rate;
 428 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 429 {
 430         struct fb_info *info = dev_id;
 431
 432         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 433                 schedule_work(&info->queue);
 434                 vbl_cursor_cnt = cursor_blink_rate;
 435         }
 436         return IRQ_HANDLED;
 437 }
 438 #endif
 439
 440 static void cursor_timer_handler(unsigned long dev_addr)
 441 {
 442         struct fb_info *info = (struct fb_info *) dev_addr;
 443         struct fbcon_ops *ops = info->fbcon_par;
 444
 445         schedule_work(&info->queue);
 446         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 447 }
 448
 449 static void fbcon_add_cursor_timer(struct fb_info *info)
 450 {
 451         struct fbcon_ops *ops = info->fbcon_par;
 452
 453         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 454             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 455             !fbcon_cursor_noblink) {
 456                 if (!info->queue.func)
 457                         INIT_WORK(&info->queue, fb_flashcursor);
 458
 459                 init_timer(&ops->cursor_timer);
 460                 ops->cursor_timer.function = cursor_timer_handler;
 461                 ops->cursor_timer.expires = jiffies + HZ / 5;
 462                 ops->cursor_timer.data = (unsigned long ) info;
 463                 add_timer(&ops->cursor_timer);
 464                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 465         }
 466 }
 467
 468 static void fbcon_del_cursor_timer(struct fb_info *info)
 469 {
 470         struct fbcon_ops *ops = info->fbcon_par;
 471
 472         if (info->queue.func == fb_flashcursor &&
 473             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 474                 del_timer_sync(&ops->cursor_timer);
 475                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 476         }
 477 }
 478
 479 #ifndef MODULE
 480 static int __init fb_console_setup(char *this_opt)
 481 {
 482         char *options;
 483         int i, j;
 484
 485         if (!this_opt || !*this_opt)
 486                 return 1;
 487
 488         while ((options = strsep(&this_opt, ",")) != NULL) {
 489                 if (!strncmp(options, "font:", 5))
 490                         strcpy(fontname, options + 5);
 491
 492                 if (!strncmp(options, "scrollback:", 11)) {
 493                         options += 11;
 494                         if (*options) {
 495                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 496                                 if (*options == 'k' || *options == 'K') {
 497                                         fbcon_softback_size *= 1024;
 498                                         options++;
 499                                 }
 500                                 if (*options != ',')
 501                                         return 1;
 502                                 options++;
 503                         } else
 504                                 return 1;
 505                 }
 506
 507                 if (!strncmp(options, "map:", 4)) {
 508                         options += 4;
 509                         if (*options) {
 510                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 511                                         if (!options[j])
 512                                                 j = 0;
 513                                         con2fb_map_boot[i] =
 514                                                 (options[j++]-'0') % FB_MAX;
 515                                 }
 516
 517                                 fbcon_map_override();
 518                         }
 519
 520                         return 1;
 521                 }
 522
 523                 if (!strncmp(options, "vc:", 3)) {
 524                         options += 3;
 525                         if (*options)
 526                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 527                         if (first_fb_vc < 0)
 528                                 first_fb_vc = 0;
 529                         if (*options++ == '-')
 530                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 531                         fbcon_is_default = 0;
 532                 }
 533
 534                 if (!strncmp(options, "rotate:", 7)) {
 535                         options += 7;
 536                         if (*options)
 537                                 initial_rotation = simple_strtoul(options, &options, 0);
 538                         if (initial_rotation > 3)
 539                                 initial_rotation = 0;
 540                 }
 541         }
 542         return 1;
 543 }
 544
 545 __setup("fbcon=", fb_console_setup);
 546 #endif
 547
 548 static int search_fb_in_map(int idx)
 549 {
 550         int i, retval = 0;
 551
 552         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 553                 if (con2fb_map[i] == idx)
 554                         retval = 1;
 555         }
 556         return retval;
 557 }
 558
 559 static int search_for_mapped_con(void)
 560 {
 561         int i, retval = 0;
 562
 563         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 564                 if (con2fb_map[i] != -1)
 565                         retval = 1;
 566         }
 567         return retval;
 568 }
 569
 570 static int fbcon_takeover(int show_logo)
 571 {
 572         int err, i;
 573
 574         if (!num_registered_fb)
 575                 return -ENODEV;
 576
 577         if (!show_logo)
 578                 logo_shown = FBCON_LOGO_DONTSHOW;
 579
 580         for (i = first_fb_vc; i <= last_fb_vc; i++)
 581                 con2fb_map[i] = info_idx;
 582
 583         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 584                                 fbcon_is_default);
 585
 586         if (err) {
 587                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 588                         con2fb_map[i] = -1;
 589                 }
 590                 info_idx = -1;
 591         }
 592
 593         return err;
 594 }
 595
 596 #ifdef MODULE
 597 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 598                                int cols, int rows, int new_cols, int new_rows)
 599 {
 600         logo_shown = FBCON_LOGO_DONTSHOW;
 601 }
 602 #else
 603 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 604                                int cols, int rows, int new_cols, int new_rows)
 605 {
 606         /* Need to make room for the logo */
 607         struct fbcon_ops *ops = info->fbcon_par;
 608         int cnt, erase = vc->vc_video_erase_char, step;
 609         unsigned short *save = NULL, *r, *q;
 610
 611         if (info->flags & FBINFO_MODULE) {
 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(logo_lines * new_cols * 2, GFP_KERNEL);
 632                 if (save) {
 633                         int i = cols < new_cols ? cols : new_cols;
 634                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 635                         r = q - step;
 636                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 637                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 638                         r = q;
 639                 }
 640         }
 641         if (r == q) {
 642                 /* We can scroll screen down */
 643                 r = q - step - cols;
 644                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 645                         scr_memcpyw(r + step, r, vc->vc_size_row);
 646                         r -= cols;
 647                 }
 648                 if (!save) {
 649                         int lines;
 650                         if (vc->vc_y + logo_lines >= rows)
 651                                 lines = rows - vc->vc_y - 1;
 652                         else
 653                                 lines = logo_lines;
 654                         vc->vc_y += lines;
 655                         vc->vc_pos += lines * vc->vc_size_row;
 656                 }
 657         }
 658         scr_memsetw((unsigned short *) vc->vc_origin,
 659                     erase,
 660                     vc->vc_size_row * logo_lines);
 661
 662         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 663                 fbcon_clear_margins(vc, 0);
 664                 update_screen(vc);
 665         }
 666
 667         if (save) {
 668                 q = (unsigned short *) (vc->vc_origin +
 669                                         vc->vc_size_row *
 670                                         rows);
 671                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 672                 vc->vc_y += logo_lines;
 673                 vc->vc_pos += logo_lines * vc->vc_size_row;
 674                 kfree(save);
 675         }
 676
 677         if (logo_lines > vc->vc_bottom) {
 678                 logo_shown = FBCON_LOGO_CANSHOW;
 679                 printk(KERN_INFO
 680                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 681         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 682                 logo_shown = FBCON_LOGO_DRAW;
 683                 vc->vc_top = logo_lines;
 684         }
 685 }
 686 #endif /* MODULE */
 687
 688 #ifdef CONFIG_FB_TILEBLITTING
 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 690 {
 691         struct fbcon_ops *ops = info->fbcon_par;
 692
 693         ops->p = &fb_display[vc->vc_num];
 694
 695         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 696                 fbcon_set_tileops(vc, info);
 697         else {
 698                 fbcon_set_rotation(info);
 699                 fbcon_set_bitops(ops);
 700         }
 701 }
 702
 703 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 704 {
 705         int err = 0;
 706
 707         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 708             info->tileops->fb_get_tilemax(info) < charcount)
 709                 err = 1;
 710
 711         return err;
 712 }
 713 #else
 714 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 715 {
 716         struct fbcon_ops *ops = info->fbcon_par;
 717
 718         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 719         ops->p = &fb_display[vc->vc_num];
 720         fbcon_set_rotation(info);
 721         fbcon_set_bitops(ops);
 722 }
 723
 724 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 725 {
 726         return 0;
 727 }
 728
 729 #endif /* CONFIG_MISC_TILEBLITTING */
 730
 731
 732 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 733                                   int unit, int oldidx)
 734 {
 735         struct fbcon_ops *ops = NULL;
 736         int err = 0;
 737
 738         if (!try_module_get(info->fbops->owner))
 739                 err = -ENODEV;
 740
 741         if (!err && info->fbops->fb_open &&
 742             info->fbops->fb_open(info, 0))
 743                 err = -ENODEV;
 744
 745         if (!err) {
 746                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 747                 if (!ops)
 748                         err = -ENOMEM;
 749         }
 750
 751         if (!err) {
 752                 info->fbcon_par = ops;
 753
 754                 if (vc)
 755                         set_blitting_type(vc, info);
 756         }
 757
 758         if (err) {
 759                 con2fb_map[unit] = oldidx;
 760                 module_put(info->fbops->owner);
 761         }
 762
 763         return err;
 764 }
 765
 766 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 767                                   struct fb_info *newinfo, int unit,
 768                                   int oldidx, int found)
 769 {
 770         struct fbcon_ops *ops = oldinfo->fbcon_par;
 771         int err = 0;
 772
 773         if (oldinfo->fbops->fb_release &&
 774             oldinfo->fbops->fb_release(oldinfo, 0)) {
 775                 con2fb_map[unit] = oldidx;
 776                 if (!found && newinfo->fbops->fb_release)
 777                         newinfo->fbops->fb_release(newinfo, 0);
 778                 if (!found)
 779                         module_put(newinfo->fbops->owner);
 780                 err = -ENODEV;
 781         }
 782
 783         if (!err) {
 784                 fbcon_del_cursor_timer(oldinfo);
 785                 kfree(ops->cursor_state.mask);
 786                 kfree(ops->cursor_data);
 787                 kfree(ops->fontbuffer);
 788                 kfree(oldinfo->fbcon_par);
 789                 oldinfo->fbcon_par = NULL;
 790                 module_put(oldinfo->fbops->owner);
 791                 /*
 792                   If oldinfo and newinfo are driving the same hardware,
 793                   the fb_release() method of oldinfo may attempt to
 794                   restore the hardware state.  This will leave the
 795                   newinfo in an undefined state. Thus, a call to
 796                   fb_set_par() may be needed for the newinfo.
 797                 */
 798                 if (newinfo->fbops->fb_set_par)
 799                         newinfo->fbops->fb_set_par(newinfo);
 800         }
 801
 802         return err;
 803 }
 804
 805 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 806                                 int unit, int show_logo)
 807 {
 808         struct fbcon_ops *ops = info->fbcon_par;
 809
 810         ops->currcon = fg_console;
 811
 812         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 813                 info->fbops->fb_set_par(info);
 814
 815         ops->flags |= FBCON_FLAGS_INIT;
 816         ops->graphics = 0;
 817         fbcon_set_disp(info, &info->var, unit);
 818
 819         if (show_logo) {
 820                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 821                 struct fb_info *fg_info =
 822                         registered_fb[con2fb_map[fg_console]];
 823
 824                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 825                                    fg_vc->vc_rows, fg_vc->vc_cols,
 826                                    fg_vc->vc_rows);
 827         }
 828
 829         update_screen(vc_cons[fg_console].d);
 830 }
 831
 832 /**
 833  *      set_con2fb_map - map console to frame buffer device
 834  *      @unit: virtual console number to map
 835  *      @newidx: frame buffer index to map virtual console to
 836  *      @user: user request
 837  *
 838  *      Maps a virtual console @unit to a frame buffer device
 839  *      @newidx.
 840  */
 841 static int set_con2fb_map(int unit, int newidx, int user)
 842 {
 843         struct vc_data *vc = vc_cons[unit].d;
 844         int oldidx = con2fb_map[unit];
 845         struct fb_info *info = registered_fb[newidx];
 846         struct fb_info *oldinfo = NULL;
 847         int found, err = 0;
 848
 849         if (oldidx == newidx)
 850                 return 0;
 851
 852         if (!info || fbcon_has_exited)
 853                 return -EINVAL;
 854
 855         if (!err && !search_for_mapped_con()) {
 856                 info_idx = newidx;
 857                 return fbcon_takeover(0);
 858         }
 859
 860         if (oldidx != -1)
 861                 oldinfo = registered_fb[oldidx];
 862
 863         found = search_fb_in_map(newidx);
 864
 865         acquire_console_sem();
 866         con2fb_map[unit] = newidx;
 867         if (!err && !found)
 868                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 869
 870
 871         /*
 872          * If old fb is not mapped to any of the consoles,
 873          * fbcon should release it.
 874          */
 875         if (!err && oldinfo && !search_fb_in_map(oldidx))
 876                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 877                                              found);
 878
 879         if (!err) {
 880                 int show_logo = (fg_console == 0 && !user &&
 881                                  logo_shown != FBCON_LOGO_DONTSHOW);
 882
 883                 if (!found)
 884                         fbcon_add_cursor_timer(info);
 885                 con2fb_map_boot[unit] = newidx;
 886                 con2fb_init_display(vc, info, unit, show_logo);
 887         }
 888
 889         if (!search_fb_in_map(info_idx))
 890                 info_idx = newidx;
 891
 892         release_console_sem();
 893         return err;
 894 }
 895
 896 /*
 897  *  Low Level Operations
 898  */
 899 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 900 static int var_to_display(struct display *disp,
 901                           struct fb_var_screeninfo *var,
 902                           struct fb_info *info)
 903 {
 904         disp->xres_virtual = var->xres_virtual;
 905         disp->yres_virtual = var->yres_virtual;
 906         disp->bits_per_pixel = var->bits_per_pixel;
 907         disp->grayscale = var->grayscale;
 908         disp->nonstd = var->nonstd;
 909         disp->accel_flags = var->accel_flags;
 910         disp->height = var->height;
 911         disp->width = var->width;
 912         disp->red = var->red;
 913         disp->green = var->green;
 914         disp->blue = var->blue;
 915         disp->transp = var->transp;
 916         disp->rotate = var->rotate;
 917         disp->mode = fb_match_mode(var, &info->modelist);
 918         if (disp->mode == NULL)
 919                 /* This should not happen */
 920                 return -EINVAL;
 921         return 0;
 922 }
 923
 924 static void display_to_var(struct fb_var_screeninfo *var,
 925                            struct display *disp)
 926 {
 927         fb_videomode_to_var(var, disp->mode);
 928         var->xres_virtual = disp->xres_virtual;
 929         var->yres_virtual = disp->yres_virtual;
 930         var->bits_per_pixel = disp->bits_per_pixel;
 931         var->grayscale = disp->grayscale;
 932         var->nonstd = disp->nonstd;
 933         var->accel_flags = disp->accel_flags;
 934         var->height = disp->height;
 935         var->width = disp->width;
 936         var->red = disp->red;
 937         var->green = disp->green;
 938         var->blue = disp->blue;
 939         var->transp = disp->transp;
 940         var->rotate = disp->rotate;
 941 }
 942
 943 static const char *fbcon_startup(void)
 944 {
 945         const char *display_desc = "frame buffer device";
 946         struct display *p = &fb_display[fg_console];
 947         struct vc_data *vc = vc_cons[fg_console].d;
 948         const struct font_desc *font = NULL;
 949         struct module *owner;
 950         struct fb_info *info = NULL;
 951         struct fbcon_ops *ops;
 952         int rows, cols;
 953         int irqres;
 954
 955         irqres = 1;
 956         /*
 957          *  If num_registered_fb is zero, this is a call for the dummy part.
 958          *  The frame buffer devices weren't initialized yet.
 959          */
 960         if (!num_registered_fb || info_idx == -1)
 961                 return display_desc;
 962         /*
 963          * Instead of blindly using registered_fb[0], we use info_idx, set by
 964          * fb_console_init();
 965          */
 966         info = registered_fb[info_idx];
 967         if (!info)
 968                 return NULL;
 969
 970         owner = info->fbops->owner;
 971         if (!try_module_get(owner))
 972                 return NULL;
 973         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 974                 module_put(owner);
 975                 return NULL;
 976         }
 977
 978         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 979         if (!ops) {
 980                 module_put(owner);
 981                 return NULL;
 982         }
 983
 984         ops->currcon = -1;
 985         ops->graphics = 1;
 986         ops->cur_rotate = -1;
 987         info->fbcon_par = ops;
 988         p->con_rotate = initial_rotation;
 989         set_blitting_type(vc, info);
 990
 991         if (info->fix.type != FB_TYPE_TEXT) {
 992                 if (fbcon_softback_size) {
 993                         if (!softback_buf) {
 994                                 softback_buf =
 995                                     (unsigned long)
 996                                     kmalloc(fbcon_softback_size,
 997                                             GFP_KERNEL);
 998                                 if (!softback_buf) {
 999                                         fbcon_softback_size = 0;
1000                                         softback_top = 0;
1001                                 }
1002                         }
1003                 } else {
1004                         if (softback_buf) {
1005                                 kfree((void *) softback_buf);
1006                                 softback_buf = 0;
1007                                 softback_top = 0;
1008                         }
1009                 }
1010                 if (softback_buf)
1011                         softback_in = softback_top = softback_curr =
1012                             softback_buf;
1013                 softback_lines = 0;
1014         }
1015
1016         /* Setup default font */
1017         if (!p->fontdata) {
1018                 if (!fontname[0] || !(font = find_font(fontname)))
1019                         font = get_default_font(info->var.xres,
1020                                                 info->var.yres,
1021                                                 info->pixmap.blit_x,
1022                                                 info->pixmap.blit_y);
1023                 vc->vc_font.width = font->width;
1024                 vc->vc_font.height = font->height;
1025                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1026                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1027         }
1028
1029         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1030         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1031         cols /= vc->vc_font.width;
1032         rows /= vc->vc_font.height;
1033         vc_resize(vc, cols, rows);
1034
1035         DPRINTK("mode:   %s\n", info->fix.id);
1036         DPRINTK("visual: %d\n", info->fix.visual);
1037         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1038                 info->var.yres,
1039                 info->var.bits_per_pixel);
1040
1041 #ifdef CONFIG_ATARI
1042         if (MACH_IS_ATARI) {
1043                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1044                 irqres =
1045                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1046                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1047                                 info);
1048         }
1049 #endif                          /* CONFIG_ATARI */
1050
1051 #ifdef CONFIG_MAC
1052         /*
1053          * On a Macintoy, the VBL interrupt may or may not be active.
1054          * As interrupt based cursor is more reliable and race free, we
1055          * probe for VBL interrupts.
1056          */
1057         if (MACH_IS_MAC) {
1058                 int ct = 0;
1059                 /*
1060                  * Probe for VBL: set temp. handler ...
1061                  */
1062                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1063                                      "framebuffer vbl", info);
1064                 vbl_detected = 0;
1065
1066                 /*
1067                  * ... and spin for 20 ms ...
1068                  */
1069                 while (!vbl_detected && ++ct < 1000)
1070                         udelay(20);
1071
1072                 if (ct == 1000)
1073                         printk
1074                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1075
1076                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1077
1078                 if (vbl_detected) {
1079                         /*
1080                          * interrupt based cursor ok
1081                          */
1082                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1083                         irqres =
1084                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1085                                         "framebuffer vbl", info);
1086                 } else {
1087                         /*
1088                          * VBL not detected: fall through, use timer based cursor
1089                          */
1090                         irqres = 1;
1091                 }
1092         }
1093 #endif                          /* CONFIG_MAC */
1094
1095         fbcon_add_cursor_timer(info);
1096         fbcon_has_exited = 0;
1097         return display_desc;
1098 }
1099
1100 static void fbcon_init(struct vc_data *vc, int init)
1101 {
1102         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1103         struct fbcon_ops *ops;
1104         struct vc_data **default_mode = vc->vc_display_fg;
1105         struct vc_data *svc = *default_mode;
1106         struct display *t, *p = &fb_display[vc->vc_num];
1107         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1108         int cap;
1109
1110         if (info_idx == -1 || info == NULL)
1111             return;
1112
1113         cap = info->flags;
1114
1115         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1116             (info->fix.type == FB_TYPE_TEXT))
1117                 logo = 0;
1118
1119         if (var_to_display(p, &info->var, info))
1120                 return;
1121
1122         if (!info->fbcon_par)
1123                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1124
1125         /* If we are not the first console on this
1126            fb, copy the font from that console */
1127         t = &fb_display[fg_console];
1128         if (!p->fontdata) {
1129                 if (t->fontdata) {
1130                         struct vc_data *fvc = vc_cons[fg_console].d;
1131
1132                         vc->vc_font.data = (void *)(p->fontdata =
1133                                                     fvc->vc_font.data);
1134                         vc->vc_font.width = fvc->vc_font.width;
1135                         vc->vc_font.height = fvc->vc_font.height;
1136                         p->userfont = t->userfont;
1137
1138                         if (p->userfont)
1139                                 REFCOUNT(p->fontdata)++;
1140                 } else {
1141                         const struct font_desc *font = NULL;
1142
1143                         if (!fontname[0] || !(font = find_font(fontname)))
1144                                 font = get_default_font(info->var.xres,
1145                                                         info->var.yres,
1146                                                         info->pixmap.blit_x,
1147                                                         info->pixmap.blit_y);
1148                         vc->vc_font.width = font->width;
1149                         vc->vc_font.height = font->height;
1150                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1151                         vc->vc_font.charcount = 256; /* FIXME  Need to
1152                                                         support more fonts */
1153                 }
1154         }
1155
1156         if (p->userfont)
1157                 charcnt = FNTCHARCNT(p->fontdata);
1158
1159         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1160         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1161         if (charcnt == 256) {
1162                 vc->vc_hi_font_mask = 0;
1163         } else {
1164                 vc->vc_hi_font_mask = 0x100;
1165                 if (vc->vc_can_do_color)
1166                         vc->vc_complement_mask <<= 1;
1167         }
1168
1169         if (!*svc->vc_uni_pagedir_loc)
1170                 con_set_default_unimap(svc);
1171         if (!*vc->vc_uni_pagedir_loc)
1172                 con_copy_unimap(vc, svc);
1173
1174         ops = info->fbcon_par;
1175         p->con_rotate = initial_rotation;
1176         set_blitting_type(vc, info);
1177
1178         cols = vc->vc_cols;
1179         rows = vc->vc_rows;
1180         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1181         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1182         new_cols /= vc->vc_font.width;
1183         new_rows /= vc->vc_font.height;
1184         vc_resize(vc, new_cols, new_rows);
1185
1186         /*
1187          * We must always set the mode. The mode of the previous console
1188          * driver could be in the same resolution but we are using different
1189          * hardware so we have to initialize the hardware.
1190          *
1191          * We need to do it in fbcon_init() to prevent screen corruption.
1192          */
1193         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1194                 if (info->fbops->fb_set_par &&
1195                     !(ops->flags & FBCON_FLAGS_INIT))
1196                         info->fbops->fb_set_par(info);
1197                 ops->flags |= FBCON_FLAGS_INIT;
1198         }
1199
1200         ops->graphics = 0;
1201
1202         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1203             !(cap & FBINFO_HWACCEL_DISABLED))
1204                 p->scrollmode = SCROLL_MOVE;
1205         else /* default to something safe */
1206                 p->scrollmode = SCROLL_REDRAW;
1207
1208         /*
1209          *  ++guenther: console.c:vc_allocate() relies on initializing
1210          *  vc_{cols,rows}, but we must not set those if we are only
1211          *  resizing the console.
1212          */
1213         if (!init) {
1214                 vc->vc_cols = new_cols;
1215                 vc->vc_rows = new_rows;
1216         }
1217
1218         if (logo)
1219                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1220
1221         if (vc == svc && softback_buf)
1222                 fbcon_update_softback(vc);
1223
1224         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1225                 ops->rotate = FB_ROTATE_UR;
1226                 set_blitting_type(vc, info);
1227         }
1228
1229         ops->p = &fb_display[fg_console];
1230 }
1231
1232 static void fbcon_free_font(struct display *p)
1233 {
1234         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1235                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1236         p->fontdata = NULL;
1237         p->userfont = 0;
1238 }
1239
1240 static void fbcon_deinit(struct vc_data *vc)
1241 {
1242         struct display *p = &fb_display[vc->vc_num];
1243         struct fb_info *info;
1244         struct fbcon_ops *ops;
1245         int idx;
1246
1247         fbcon_free_font(p);
1248         idx = con2fb_map[vc->vc_num];
1249
1250         if (idx == -1)
1251                 goto finished;
1252
1253         info = registered_fb[idx];
1254
1255         if (!info)
1256                 goto finished;
1257
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         if (!con_is_bound(&fb_con))
1270                 fbcon_exit();
1271
1272         return;
1273 }
1274
1275 /* ====================================================================== */
1276
1277 /*  fbcon_XXX routines - interface used by the world
1278  *
1279  *  This system is now divided into two levels because of complications
1280  *  caused by hardware scrolling. Top level functions:
1281  *
1282  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1283  *
1284  *  handles y values in range [0, scr_height-1] that correspond to real
1285  *  screen positions. y_wrap shift means that first line of bitmap may be
1286  *  anywhere on this display. These functions convert lineoffsets to
1287  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1288  *
1289  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1290  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1291  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1292  *
1293  *  WARNING:
1294  *
1295  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1296  *  Implies should only really hardware scroll in rows. Only reason for
1297  *  restriction is simplicity & efficiency at the moment.
1298  */
1299
1300 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1301                         int width)
1302 {
1303         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1304         struct fbcon_ops *ops = info->fbcon_par;
1305
1306         struct display *p = &fb_display[vc->vc_num];
1307         u_int y_break;
1308
1309         if (fbcon_is_inactive(vc, info))
1310                 return;
1311
1312         if (!height || !width)
1313                 return;
1314
1315         /* Split blits that cross physical y_wrap boundary */
1316
1317         y_break = p->vrows - p->yscroll;
1318         if (sy < y_break && sy + height - 1 >= y_break) {
1319                 u_int b = y_break - sy;
1320                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1321                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1322                                  width);
1323         } else
1324                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1325 }
1326
1327 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1328                         int count, int ypos, int xpos)
1329 {
1330         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1331         struct display *p = &fb_display[vc->vc_num];
1332         struct fbcon_ops *ops = info->fbcon_par;
1333
1334         if (!fbcon_is_inactive(vc, info))
1335                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1336                            get_color(vc, info, scr_readw(s), 1),
1337                            get_color(vc, info, scr_readw(s), 0));
1338 }
1339
1340 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1341 {
1342         unsigned short chr;
1343
1344         scr_writew(c, &chr);
1345         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1346 }
1347
1348 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1349 {
1350         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1351         struct fbcon_ops *ops = info->fbcon_par;
1352
1353         if (!fbcon_is_inactive(vc, info))
1354                 ops->clear_margins(vc, info, bottom_only);
1355 }
1356
1357 static void fbcon_cursor(struct vc_data *vc, int mode)
1358 {
1359         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1360         struct fbcon_ops *ops = info->fbcon_par;
1361         int y;
1362         int c = scr_readw((u16 *) vc->vc_pos);
1363
1364         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1365                 return;
1366
1367         if (vc->vc_cursor_type & 0x10)
1368                 fbcon_del_cursor_timer(info);
1369         else
1370                 fbcon_add_cursor_timer(info);
1371
1372         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1373         if (mode & CM_SOFTBACK) {
1374                 mode &= ~CM_SOFTBACK;
1375                 y = softback_lines;
1376         } else {
1377                 if (softback_lines)
1378                         fbcon_set_origin(vc);
1379                 y = 0;
1380         }
1381
1382         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1383                     get_color(vc, info, c, 0));
1384         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1385 }
1386
1387 static int scrollback_phys_max = 0;
1388 static int scrollback_max = 0;
1389 static int scrollback_current = 0;
1390
1391 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1392                            int unit)
1393 {
1394         struct display *p, *t;
1395         struct vc_data **default_mode, *vc;
1396         struct vc_data *svc;
1397         struct fbcon_ops *ops = info->fbcon_par;
1398         int rows, cols, charcnt = 256;
1399
1400         p = &fb_display[unit];
1401
1402         if (var_to_display(p, var, info))
1403                 return;
1404
1405         vc = vc_cons[unit].d;
1406
1407         if (!vc)
1408                 return;
1409
1410         default_mode = vc->vc_display_fg;
1411         svc = *default_mode;
1412         t = &fb_display[svc->vc_num];
1413
1414         if (!vc->vc_font.data) {
1415                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1416                 vc->vc_font.width = (*default_mode)->vc_font.width;
1417                 vc->vc_font.height = (*default_mode)->vc_font.height;
1418                 p->userfont = t->userfont;
1419                 if (p->userfont)
1420                         REFCOUNT(p->fontdata)++;
1421         }
1422         if (p->userfont)
1423                 charcnt = FNTCHARCNT(p->fontdata);
1424
1425         var->activate = FB_ACTIVATE_NOW;
1426         info->var.activate = var->activate;
1427         var->yoffset = info->var.yoffset;
1428         var->xoffset = info->var.xoffset;
1429         fb_set_var(info, var);
1430         ops->var = info->var;
1431         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1432         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1433         if (charcnt == 256) {
1434                 vc->vc_hi_font_mask = 0;
1435         } else {
1436                 vc->vc_hi_font_mask = 0x100;
1437                 if (vc->vc_can_do_color)
1438                         vc->vc_complement_mask <<= 1;
1439         }
1440
1441         if (!*svc->vc_uni_pagedir_loc)
1442                 con_set_default_unimap(svc);
1443         if (!*vc->vc_uni_pagedir_loc)
1444                 con_copy_unimap(vc, svc);
1445
1446         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1447         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1448         cols /= vc->vc_font.width;
1449         rows /= vc->vc_font.height;
1450         vc_resize(vc, cols, rows);
1451
1452         if (CON_IS_VISIBLE(vc)) {
1453                 update_screen(vc);
1454                 if (softback_buf)
1455                         fbcon_update_softback(vc);
1456         }
1457 }
1458
1459 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1460 {
1461         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1462         struct fbcon_ops *ops = info->fbcon_par;
1463         struct display *p = &fb_display[vc->vc_num];
1464
1465         p->yscroll += count;
1466         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1467                 p->yscroll -= p->vrows;
1468         ops->var.xoffset = 0;
1469         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1470         ops->var.vmode |= FB_VMODE_YWRAP;
1471         ops->update_start(info);
1472         scrollback_max += count;
1473         if (scrollback_max > scrollback_phys_max)
1474                 scrollback_max = scrollback_phys_max;
1475         scrollback_current = 0;
1476 }
1477
1478 static __inline__ void ywrap_down(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 display *p = &fb_display[vc->vc_num];
1483
1484         p->yscroll -= count;
1485         if (p->yscroll < 0)     /* 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 < 0)
1493                 scrollback_max = 0;
1494         scrollback_current = 0;
1495 }
1496
1497 static __inline__ void ypan_up(struct vc_data *vc, int count)
1498 {
1499         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1500         struct display *p = &fb_display[vc->vc_num];
1501         struct fbcon_ops *ops = info->fbcon_par;
1502
1503         p->yscroll += count;
1504         if (p->yscroll > p->vrows - vc->vc_rows) {
1505                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1506                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1507                 p->yscroll -= p->vrows - vc->vc_rows;
1508         }
1509
1510         ops->var.xoffset = 0;
1511         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1512         ops->var.vmode &= ~FB_VMODE_YWRAP;
1513         ops->update_start(info);
1514         fbcon_clear_margins(vc, 1);
1515         scrollback_max += count;
1516         if (scrollback_max > scrollback_phys_max)
1517                 scrollback_max = scrollback_phys_max;
1518         scrollback_current = 0;
1519 }
1520
1521 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1522 {
1523         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1524         struct fbcon_ops *ops = info->fbcon_par;
1525         struct display *p = &fb_display[vc->vc_num];
1526
1527         p->yscroll += count;
1528
1529         if (p->yscroll > p->vrows - vc->vc_rows) {
1530                 p->yscroll -= p->vrows - vc->vc_rows;
1531                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1532         }
1533
1534         ops->var.xoffset = 0;
1535         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1536         ops->var.vmode &= ~FB_VMODE_YWRAP;
1537         ops->update_start(info);
1538         fbcon_clear_margins(vc, 1);
1539         scrollback_max += count;
1540         if (scrollback_max > scrollback_phys_max)
1541                 scrollback_max = scrollback_phys_max;
1542         scrollback_current = 0;
1543 }
1544
1545 static __inline__ void ypan_down(struct vc_data *vc, int count)
1546 {
1547         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1548         struct display *p = &fb_display[vc->vc_num];
1549         struct fbcon_ops *ops = info->fbcon_par;
1550
1551         p->yscroll -= count;
1552         if (p->yscroll < 0) {
1553                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1554                             0, vc->vc_rows, vc->vc_cols);
1555                 p->yscroll += p->vrows - vc->vc_rows;
1556         }
1557
1558         ops->var.xoffset = 0;
1559         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1560         ops->var.vmode &= ~FB_VMODE_YWRAP;
1561         ops->update_start(info);
1562         fbcon_clear_margins(vc, 1);
1563         scrollback_max -= count;
1564         if (scrollback_max < 0)
1565                 scrollback_max = 0;
1566         scrollback_current = 0;
1567 }
1568
1569 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1570 {
1571         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1572         struct fbcon_ops *ops = info->fbcon_par;
1573         struct display *p = &fb_display[vc->vc_num];
1574
1575         p->yscroll -= count;
1576
1577         if (p->yscroll < 0) {
1578                 p->yscroll += p->vrows - vc->vc_rows;
1579                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1580         }
1581
1582         ops->var.xoffset = 0;
1583         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1584         ops->var.vmode &= ~FB_VMODE_YWRAP;
1585         ops->update_start(info);
1586         fbcon_clear_margins(vc, 1);
1587         scrollback_max -= count;
1588         if (scrollback_max < 0)
1589                 scrollback_max = 0;
1590         scrollback_current = 0;
1591 }
1592
1593 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1594                                   long delta)
1595 {
1596         int count = vc->vc_rows;
1597         unsigned short *d, *s;
1598         unsigned long n;
1599         int line = 0;
1600
1601         d = (u16 *) softback_curr;
1602         if (d == (u16 *) softback_in)
1603                 d = (u16 *) vc->vc_origin;
1604         n = softback_curr + delta * vc->vc_size_row;
1605         softback_lines -= delta;
1606         if (delta < 0) {
1607                 if (softback_curr < softback_top && n < softback_buf) {
1608                         n += softback_end - softback_buf;
1609                         if (n < softback_top) {
1610                                 softback_lines -=
1611                                     (softback_top - n) / vc->vc_size_row;
1612                                 n = softback_top;
1613                         }
1614                 } else if (softback_curr >= softback_top
1615                            && n < softback_top) {
1616                         softback_lines -=
1617                             (softback_top - n) / vc->vc_size_row;
1618                         n = softback_top;
1619                 }
1620         } else {
1621                 if (softback_curr > softback_in && n >= softback_end) {
1622                         n += softback_buf - softback_end;
1623                         if (n > softback_in) {
1624                                 n = softback_in;
1625                                 softback_lines = 0;
1626                         }
1627                 } else if (softback_curr <= softback_in && n > softback_in) {
1628                         n = softback_in;
1629                         softback_lines = 0;
1630                 }
1631         }
1632         if (n == softback_curr)
1633                 return;
1634         softback_curr = n;
1635         s = (u16 *) softback_curr;
1636         if (s == (u16 *) softback_in)
1637                 s = (u16 *) vc->vc_origin;
1638         while (count--) {
1639                 unsigned short *start;
1640                 unsigned short *le;
1641                 unsigned short c;
1642                 int x = 0;
1643                 unsigned short attr = 1;
1644
1645                 start = s;
1646                 le = advance_row(s, 1);
1647                 do {
1648                         c = scr_readw(s);
1649                         if (attr != (c & 0xff00)) {
1650                                 attr = c & 0xff00;
1651                                 if (s > start) {
1652                                         fbcon_putcs(vc, start, s - start,
1653                                                     line, x);
1654                                         x += s - start;
1655                                         start = s;
1656                                 }
1657                         }
1658                         if (c == scr_readw(d)) {
1659                                 if (s > start) {
1660                                         fbcon_putcs(vc, start, s - start,
1661                                                     line, x);
1662                                         x += s - start + 1;
1663                                         start = s + 1;
1664                                 } else {
1665                                         x++;
1666                                         start++;
1667                                 }
1668                         }
1669                         s++;
1670                         d++;
1671                 } while (s < le);
1672                 if (s > start)
1673                         fbcon_putcs(vc, start, s - start, line, x);
1674                 line++;
1675                 if (d == (u16 *) softback_end)
1676                         d = (u16 *) softback_buf;
1677                 if (d == (u16 *) softback_in)
1678                         d = (u16 *) vc->vc_origin;
1679                 if (s == (u16 *) softback_end)
1680                         s = (u16 *) softback_buf;
1681                 if (s == (u16 *) softback_in)
1682                         s = (u16 *) vc->vc_origin;
1683         }
1684 }
1685
1686 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1687                               int line, int count, int dy)
1688 {
1689         unsigned short *s = (unsigned short *)
1690                 (vc->vc_origin + vc->vc_size_row * line);
1691
1692         while (count--) {
1693                 unsigned short *start = s;
1694                 unsigned short *le = advance_row(s, 1);
1695                 unsigned short c;
1696                 int x = 0;
1697                 unsigned short attr = 1;
1698
1699                 do {
1700                         c = scr_readw(s);
1701                         if (attr != (c & 0xff00)) {
1702                                 attr = c & 0xff00;
1703                                 if (s > start) {
1704                                         fbcon_putcs(vc, start, s - start,
1705                                                     dy, x);
1706                                         x += s - start;
1707                                         start = s;
1708                                 }
1709                         }
1710                         console_conditional_schedule();
1711                         s++;
1712                 } while (s < le);
1713                 if (s > start)
1714                         fbcon_putcs(vc, start, s - start, dy, x);
1715                 console_conditional_schedule();
1716                 dy++;
1717         }
1718 }
1719
1720 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1721                         struct display *p, int line, int count, int ycount)
1722 {
1723         int offset = ycount * vc->vc_cols;
1724         unsigned short *d = (unsigned short *)
1725             (vc->vc_origin + vc->vc_size_row * line);
1726         unsigned short *s = d + offset;
1727         struct fbcon_ops *ops = info->fbcon_par;
1728
1729         while (count--) {
1730                 unsigned short *start = s;
1731                 unsigned short *le = advance_row(s, 1);
1732                 unsigned short c;
1733                 int x = 0;
1734
1735                 do {
1736                         c = scr_readw(s);
1737
1738                         if (c == scr_readw(d)) {
1739                                 if (s > start) {
1740                                         ops->bmove(vc, info, line + ycount, x,
1741                                                    line, x, 1, s-start);
1742                                         x += s - start + 1;
1743                                         start = s + 1;
1744                                 } else {
1745                                         x++;
1746                                         start++;
1747                                 }
1748                         }
1749
1750                         scr_writew(c, d);
1751                         console_conditional_schedule();
1752                         s++;
1753                         d++;
1754                 } while (s < le);
1755                 if (s > start)
1756                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1757                                    s-start);
1758                 console_conditional_schedule();
1759                 if (ycount > 0)
1760                         line++;
1761                 else {
1762                         line--;
1763                         /* NOTE: We subtract two lines from these pointers */
1764                         s -= vc->vc_size_row;
1765                         d -= vc->vc_size_row;
1766                 }
1767         }
1768 }
1769
1770 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1771                          int line, int count, int offset)
1772 {
1773         unsigned short *d = (unsigned short *)
1774             (vc->vc_origin + vc->vc_size_row * line);
1775         unsigned short *s = d + offset;
1776
1777         while (count--) {
1778                 unsigned short *start = s;
1779                 unsigned short *le = advance_row(s, 1);
1780                 unsigned short c;
1781                 int x = 0;
1782                 unsigned short attr = 1;
1783
1784                 do {
1785                         c = scr_readw(s);
1786                         if (attr != (c & 0xff00)) {
1787                                 attr = c & 0xff00;
1788                                 if (s > start) {
1789                                         fbcon_putcs(vc, start, s - start,
1790                                                     line, x);
1791                                         x += s - start;
1792                                         start = s;
1793                                 }
1794                         }
1795                         if (c == scr_readw(d)) {
1796                                 if (s > start) {
1797                                         fbcon_putcs(vc, start, s - start,
1798                                                      line, x);
1799                                         x += s - start + 1;
1800                                         start = s + 1;
1801                                 } else {
1802                                         x++;
1803                                         start++;
1804                                 }
1805                         }
1806                         scr_writew(c, d);
1807                         console_conditional_schedule();
1808                         s++;
1809                         d++;
1810                 } while (s < le);
1811                 if (s > start)
1812                         fbcon_putcs(vc, start, s - start, line, x);
1813                 console_conditional_schedule();
1814                 if (offset > 0)
1815                         line++;
1816                 else {
1817                         line--;
1818                         /* NOTE: We subtract two lines from these pointers */
1819                         s -= vc->vc_size_row;
1820                         d -= vc->vc_size_row;
1821                 }
1822         }
1823 }
1824
1825 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1826                                        int count)
1827 {
1828         unsigned short *p;
1829
1830         if (vc->vc_num != fg_console)
1831                 return;
1832         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1833
1834         while (count) {
1835                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1836                 count--;
1837                 p = advance_row(p, 1);
1838                 softback_in += vc->vc_size_row;
1839                 if (softback_in == softback_end)
1840                         softback_in = softback_buf;
1841                 if (softback_in == softback_top) {
1842                         softback_top += vc->vc_size_row;
1843                         if (softback_top == softback_end)
1844                                 softback_top = softback_buf;
1845                 }
1846         }
1847         softback_curr = softback_in;
1848 }
1849
1850 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1851                         int count)
1852 {
1853         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1854         struct display *p = &fb_display[vc->vc_num];
1855         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1856
1857         if (fbcon_is_inactive(vc, info))
1858                 return -EINVAL;
1859
1860         fbcon_cursor(vc, CM_ERASE);
1861
1862         /*
1863          * ++Geert: Only use ywrap/ypan if the console is in text mode
1864          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1865          *           whole screen (prevents flicker).
1866          */
1867
1868         switch (dir) {
1869         case SM_UP:
1870                 if (count > vc->vc_rows)        /* Maximum realistic size */
1871                         count = vc->vc_rows;
1872                 if (softback_top)
1873                         fbcon_softback_note(vc, t, count);
1874                 if (logo_shown >= 0)
1875                         goto redraw_up;
1876                 switch (p->scrollmode) {
1877                 case SCROLL_MOVE:
1878                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1879                                      count);
1880                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1881                         scr_memsetw((unsigned short *) (vc->vc_origin +
1882                                                         vc->vc_size_row *
1883                                                         (b - count)),
1884                                     vc->vc_video_erase_char,
1885                                     vc->vc_size_row * count);
1886                         return 1;
1887                         break;
1888
1889                 case SCROLL_WRAP_MOVE:
1890                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1891                                 if (t > 0)
1892                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1893                                                     vc->vc_cols);
1894                                 ywrap_up(vc, count);
1895                                 if (vc->vc_rows - b > 0)
1896                                         fbcon_bmove(vc, b - count, 0, b, 0,
1897                                                     vc->vc_rows - b,
1898                                                     vc->vc_cols);
1899                         } else if (info->flags & FBINFO_READS_FAST)
1900                                 fbcon_bmove(vc, t + count, 0, t, 0,
1901                                             b - t - count, vc->vc_cols);
1902                         else
1903                                 goto redraw_up;
1904                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1905                         break;
1906
1907                 case SCROLL_PAN_REDRAW:
1908                         if ((p->yscroll + count <=
1909                              2 * (p->vrows - vc->vc_rows))
1910                             && ((!scroll_partial && (b - t == vc->vc_rows))
1911                                 || (scroll_partial
1912                                     && (b - t - count >
1913                                         3 * vc->vc_rows >> 2)))) {
1914                                 if (t > 0)
1915                                         fbcon_redraw_move(vc, p, 0, t, count);
1916                                 ypan_up_redraw(vc, t, count);
1917                                 if (vc->vc_rows - b > 0)
1918                                         fbcon_redraw_move(vc, p, b,
1919                                                           vc->vc_rows - b, b);
1920                         } else
1921                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1922                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1923                         break;
1924
1925                 case SCROLL_PAN_MOVE:
1926                         if ((p->yscroll + count <=
1927                              2 * (p->vrows - vc->vc_rows))
1928                             && ((!scroll_partial && (b - t == vc->vc_rows))
1929                                 || (scroll_partial
1930                                     && (b - t - count >
1931                                         3 * vc->vc_rows >> 2)))) {
1932                                 if (t > 0)
1933                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1934                                                     vc->vc_cols);
1935                                 ypan_up(vc, count);
1936                                 if (vc->vc_rows - b > 0)
1937                                         fbcon_bmove(vc, b - count, 0, b, 0,
1938                                                     vc->vc_rows - b,
1939                                                     vc->vc_cols);
1940                         } else if (info->flags & FBINFO_READS_FAST)
1941                                 fbcon_bmove(vc, t + count, 0, t, 0,
1942                                             b - t - count, vc->vc_cols);
1943                         else
1944                                 goto redraw_up;
1945                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1946                         break;
1947
1948                 case SCROLL_REDRAW:
1949                       redraw_up:
1950                         fbcon_redraw(vc, p, t, b - t - count,
1951                                      count * vc->vc_cols);
1952                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1953                         scr_memsetw((unsigned short *) (vc->vc_origin +
1954                                                         vc->vc_size_row *
1955                                                         (b - count)),
1956                                     vc->vc_video_erase_char,
1957                                     vc->vc_size_row * count);
1958                         return 1;
1959                 }
1960                 break;
1961
1962         case SM_DOWN:
1963                 if (count > vc->vc_rows)        /* Maximum realistic size */
1964                         count = vc->vc_rows;
1965                 if (logo_shown >= 0)
1966                         goto redraw_down;
1967                 switch (p->scrollmode) {
1968                 case SCROLL_MOVE:
1969                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1970                                      -count);
1971                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1972                         scr_memsetw((unsigned short *) (vc->vc_origin +
1973                                                         vc->vc_size_row *
1974                                                         t),
1975                                     vc->vc_video_erase_char,
1976                                     vc->vc_size_row * count);
1977                         return 1;
1978                         break;
1979
1980                 case SCROLL_WRAP_MOVE:
1981                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1982                                 if (vc->vc_rows - b > 0)
1983                                         fbcon_bmove(vc, b, 0, b - count, 0,
1984                                                     vc->vc_rows - b,
1985                                                     vc->vc_cols);
1986                                 ywrap_down(vc, count);
1987                                 if (t > 0)
1988                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1989                                                     vc->vc_cols);
1990                         } else if (info->flags & FBINFO_READS_FAST)
1991                                 fbcon_bmove(vc, t, 0, t + count, 0,
1992                                             b - t - count, vc->vc_cols);
1993                         else
1994                                 goto redraw_down;
1995                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1996                         break;
1997
1998                 case SCROLL_PAN_MOVE:
1999                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2000                             && ((!scroll_partial && (b - t == vc->vc_rows))
2001                                 || (scroll_partial
2002                                     && (b - t - count >
2003                                         3 * vc->vc_rows >> 2)))) {
2004                                 if (vc->vc_rows - b > 0)
2005                                         fbcon_bmove(vc, b, 0, b - count, 0,
2006                                                     vc->vc_rows - b,
2007                                                     vc->vc_cols);
2008                                 ypan_down(vc, count);
2009                                 if (t > 0)
2010                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2011                                                     vc->vc_cols);
2012                         } else if (info->flags & FBINFO_READS_FAST)
2013                                 fbcon_bmove(vc, t, 0, t + count, 0,
2014                                             b - t - count, vc->vc_cols);
2015                         else
2016                                 goto redraw_down;
2017                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2018                         break;
2019
2020                 case SCROLL_PAN_REDRAW:
2021                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2022                             && ((!scroll_partial && (b - t == vc->vc_rows))
2023                                 || (scroll_partial
2024                                     && (b - t - count >
2025                                         3 * vc->vc_rows >> 2)))) {
2026                                 if (vc->vc_rows - b > 0)
2027                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2028                                                           b - count);
2029                                 ypan_down_redraw(vc, t, count);
2030                                 if (t > 0)
2031                                         fbcon_redraw_move(vc, p, count, t, 0);
2032                         } else
2033                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2034                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2035                         break;
2036
2037                 case SCROLL_REDRAW:
2038                       redraw_down:
2039                         fbcon_redraw(vc, p, b - 1, b - t - count,
2040                                      -count * vc->vc_cols);
2041                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2042                         scr_memsetw((unsigned short *) (vc->vc_origin +
2043                                                         vc->vc_size_row *
2044                                                         t),
2045                                     vc->vc_video_erase_char,
2046                                     vc->vc_size_row * count);
2047                         return 1;
2048                 }
2049         }
2050         return 0;
2051 }
2052
2053
2054 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2055                         int height, int width)
2056 {
2057         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2058         struct display *p = &fb_display[vc->vc_num];
2059
2060         if (fbcon_is_inactive(vc, info))
2061                 return;
2062
2063         if (!width || !height)
2064                 return;
2065
2066         /*  Split blits that cross physical y_wrap case.
2067          *  Pathological case involves 4 blits, better to use recursive
2068          *  code rather than unrolled case
2069          *
2070          *  Recursive invocations don't need to erase the cursor over and
2071          *  over again, so we use fbcon_bmove_rec()
2072          */
2073         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2074                         p->vrows - p->yscroll);
2075 }
2076
2077 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2078                             int dy, int dx, int height, int width, u_int y_break)
2079 {
2080         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2081         struct fbcon_ops *ops = info->fbcon_par;
2082         u_int b;
2083
2084         if (sy < y_break && sy + height > y_break) {
2085                 b = y_break - sy;
2086                 if (dy < sy) {  /* Avoid trashing self */
2087                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2088                                         y_break);
2089                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2090                                         height - b, width, y_break);
2091                 } else {
2092                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2093                                         height - b, width, y_break);
2094                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2095                                         y_break);
2096                 }
2097                 return;
2098         }
2099
2100         if (dy < y_break && dy + height > y_break) {
2101                 b = y_break - dy;
2102                 if (dy < sy) {  /* Avoid trashing self */
2103                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2104                                         y_break);
2105                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2106                                         height - b, width, y_break);
2107                 } else {
2108                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2109                                         height - b, width, y_break);
2110                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2111                                         y_break);
2112                 }
2113                 return;
2114         }
2115         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2116                    height, width);
2117 }
2118
2119 static __inline__ void updatescrollmode(struct display *p,
2120                                         struct fb_info *info,
2121                                         struct vc_data *vc)
2122 {
2123         struct fbcon_ops *ops = info->fbcon_par;
2124         int fh = vc->vc_font.height;
2125         int cap = info->flags;
2126         u16 t = 0;
2127         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2128                                   info->fix.xpanstep);
2129         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2130         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2131         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2132                                    info->var.xres_virtual);
2133         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2134                 divides(ypan, vc->vc_font.height) && vyres > yres;
2135         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2136                 divides(ywrap, vc->vc_font.height) &&
2137                 divides(vc->vc_font.height, vyres) &&
2138                 divides(vc->vc_font.height, yres);
2139         int reading_fast = cap & FBINFO_READS_FAST;
2140         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2141                 !(cap & FBINFO_HWACCEL_DISABLED);
2142         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2143                 !(cap & FBINFO_HWACCEL_DISABLED);
2144
2145         p->vrows = vyres/fh;
2146         if (yres > (fh * (vc->vc_rows + 1)))
2147                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2148         if ((yres % fh) && (vyres % fh < yres % fh))
2149                 p->vrows--;
2150
2151         if (good_wrap || good_pan) {
2152                 if (reading_fast || fast_copyarea)
2153                         p->scrollmode = good_wrap ?
2154                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2155                 else
2156                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2157                                 SCROLL_PAN_REDRAW;
2158         } else {
2159                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2160                         p->scrollmode = SCROLL_MOVE;
2161                 else
2162                         p->scrollmode = SCROLL_REDRAW;
2163         }
2164 }
2165
2166 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2167                         unsigned int height, unsigned int user)
2168 {
2169         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2170         struct fbcon_ops *ops = info->fbcon_par;
2171         struct display *p = &fb_display[vc->vc_num];
2172         struct fb_var_screeninfo var = info->var;
2173         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2174
2175         virt_w = FBCON_SWAP(ops->rotate, width, height);
2176         virt_h = FBCON_SWAP(ops->rotate, height, width);
2177         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2178                                  vc->vc_font.height);
2179         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2180                                  vc->vc_font.width);
2181         var.xres = virt_w * virt_fw;
2182         var.yres = virt_h * virt_fh;
2183         x_diff = info->var.xres - var.xres;
2184         y_diff = info->var.yres - var.yres;
2185         if (x_diff < 0 || x_diff > virt_fw ||
2186             y_diff < 0 || y_diff > virt_fh) {
2187                 const struct fb_videomode *mode;
2188
2189                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2190                 mode = fb_find_best_mode(&var, &info->modelist);
2191                 if (mode == NULL)
2192                         return -EINVAL;
2193                 display_to_var(&var, p);
2194                 fb_videomode_to_var(&var, mode);
2195
2196                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2197                         return -EINVAL;
2198
2199                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2200                 if (CON_IS_VISIBLE(vc)) {
2201                         var.activate = FB_ACTIVATE_NOW |
2202                                 FB_ACTIVATE_FORCE;
2203                         fb_set_var(info, &var);
2204                 }
2205                 var_to_display(p, &info->var, info);
2206                 ops->var = info->var;
2207         }
2208         updatescrollmode(p, info, vc);
2209         return 0;
2210 }
2211
2212 static int fbcon_switch(struct vc_data *vc)
2213 {
2214         struct fb_info *info, *old_info = NULL;
2215         struct fbcon_ops *ops;
2216         struct display *p = &fb_display[vc->vc_num];
2217         struct fb_var_screeninfo var;
2218         int i, prev_console, charcnt = 256;
2219
2220         info = registered_fb[con2fb_map[vc->vc_num]];
2221         ops = info->fbcon_par;
2222
2223         if (softback_top) {
2224                 if (softback_lines)
2225                         fbcon_set_origin(vc);
2226                 softback_top = softback_curr = softback_in = softback_buf;
2227                 softback_lines = 0;
2228                 fbcon_update_softback(vc);
2229         }
2230
2231         if (logo_shown >= 0) {
2232                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2233
2234                 if (conp2->vc_top == logo_lines
2235                     && conp2->vc_bottom == conp2->vc_rows)
2236                         conp2->vc_top = 0;
2237                 logo_shown = FBCON_LOGO_CANSHOW;
2238         }
2239
2240         prev_console = ops->currcon;
2241         if (prev_console != -1)
2242                 old_info = registered_fb[con2fb_map[prev_console]];
2243         /*
2244          * FIXME: If we have multiple fbdev's loaded, we need to
2245          * update all info->currcon.  Perhaps, we can place this
2246          * in a centralized structure, but this might break some
2247          * drivers.
2248          *
2249          * info->currcon = vc->vc_num;
2250          */
2251         for (i = 0; i < FB_MAX; i++) {
2252                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2253                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2254
2255                         o->currcon = vc->vc_num;
2256                 }
2257         }
2258         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2259         display_to_var(&var, p);
2260         var.activate = FB_ACTIVATE_NOW;
2261
2262         /*
2263          * make sure we don't unnecessarily trip the memcmp()
2264          * in fb_set_var()
2265          */
2266         info->var.activate = var.activate;
2267         var.yoffset = info->var.yoffset;
2268         var.xoffset = info->var.xoffset;
2269         var.vmode = info->var.vmode;
2270         fb_set_var(info, &var);
2271         ops->var = info->var;
2272
2273         if (old_info != NULL && (old_info != info ||
2274                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2275                 if (info->fbops->fb_set_par)
2276                         info->fbops->fb_set_par(info);
2277
2278                 if (old_info != info)
2279                         fbcon_del_cursor_timer(old_info);
2280         }
2281
2282         if (fbcon_is_inactive(vc, info) ||
2283             ops->blank_state != FB_BLANK_UNBLANK)
2284                 fbcon_del_cursor_timer(info);
2285         else
2286                 fbcon_add_cursor_timer(info);
2287
2288         set_blitting_type(vc, info);
2289         ops->cursor_reset = 1;
2290
2291         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2292                 ops->rotate = FB_ROTATE_UR;
2293                 set_blitting_type(vc, info);
2294         }
2295
2296         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2297         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2298
2299         if (p->userfont)
2300                 charcnt = FNTCHARCNT(vc->vc_font.data);
2301
2302         if (charcnt > 256)
2303                 vc->vc_complement_mask <<= 1;
2304
2305         updatescrollmode(p, info, vc);
2306
2307         switch (p->scrollmode) {
2308         case SCROLL_WRAP_MOVE:
2309                 scrollback_phys_max = p->vrows - vc->vc_rows;
2310                 break;
2311         case SCROLL_PAN_MOVE:
2312         case SCROLL_PAN_REDRAW:
2313                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2314                 if (scrollback_phys_max < 0)
2315                         scrollback_phys_max = 0;
2316                 break;
2317         default:
2318                 scrollback_phys_max = 0;
2319                 break;
2320         }
2321
2322         scrollback_max = 0;
2323         scrollback_current = 0;
2324
2325         if (!fbcon_is_inactive(vc, info)) {
2326             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2327             ops->update_start(info);
2328         }
2329
2330         fbcon_set_palette(vc, color_table);
2331         fbcon_clear_margins(vc, 0);
2332
2333         if (logo_shown == FBCON_LOGO_DRAW) {
2334
2335                 logo_shown = fg_console;
2336                 /* This is protected above by initmem_freed */
2337                 fb_show_logo(info, ops->rotate);
2338                 update_region(vc,
2339                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2340                               vc->vc_size_row * (vc->vc_bottom -
2341                                                  vc->vc_top) / 2);
2342                 return 0;
2343         }
2344         return 1;
2345 }
2346
2347 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2348                                 int blank)
2349 {
2350         struct fb_event event;
2351
2352         if (blank) {
2353                 unsigned short charmask = vc->vc_hi_font_mask ?
2354                         0x1ff : 0xff;
2355                 unsigned short oldc;
2356
2357                 oldc = vc->vc_video_erase_char;
2358                 vc->vc_video_erase_char &= charmask;
2359                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2360                 vc->vc_video_erase_char = oldc;
2361         }
2362
2363
2364         event.info = info;
2365         event.data = &blank;
2366         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2367 }
2368
2369 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2370 {
2371         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2372         struct fbcon_ops *ops = info->fbcon_par;
2373
2374         if (mode_switch) {
2375                 struct fb_var_screeninfo var = info->var;
2376
2377                 ops->graphics = 1;
2378
2379                 if (!blank) {
2380                         if (info->fbops->fb_save_state)
2381                                 info->fbops->fb_save_state(info);
2382                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2383                         fb_set_var(info, &var);
2384                         ops->graphics = 0;
2385                         ops->var = info->var;
2386                 } else if (info->fbops->fb_restore_state)
2387                         info->fbops->fb_restore_state(info);
2388         }
2389
2390         if (!fbcon_is_inactive(vc, info)) {
2391                 if (ops->blank_state != blank) {
2392                         ops->blank_state = blank;
2393                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2394                         ops->cursor_flash = (!blank);
2395
2396                         if (fb_blank(info, blank))
2397                                 fbcon_generic_blank(vc, info, blank);
2398                 }
2399
2400                 if (!blank)
2401                         update_screen(vc);
2402         }
2403
2404         if (mode_switch || fbcon_is_inactive(vc, info) ||
2405             ops->blank_state != FB_BLANK_UNBLANK)
2406                 fbcon_del_cursor_timer(info);
2407         else
2408                 fbcon_add_cursor_timer(info);
2409
2410         return 0;
2411 }
2412
2413 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2414 {
2415         u8 *fontdata = vc->vc_font.data;
2416         u8 *data = font->data;
2417         int i, j;
2418
2419         font->width = vc->vc_font.width;
2420         font->height = vc->vc_font.height;
2421         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2422         if (!font->data)
2423                 return 0;
2424
2425         if (font->width <= 8) {
2426                 j = vc->vc_font.height;
2427                 for (i = 0; i < font->charcount; i++) {
2428                         memcpy(data, fontdata, j);
2429                         memset(data + j, 0, 32 - j);
2430                         data += 32;
2431                         fontdata += j;
2432                 }
2433         } else if (font->width <= 16) {
2434                 j = vc->vc_font.height * 2;
2435                 for (i = 0; i < font->charcount; i++) {
2436                         memcpy(data, fontdata, j);
2437                         memset(data + j, 0, 64 - j);
2438                         data += 64;
2439                         fontdata += j;
2440                 }
2441         } else if (font->width <= 24) {
2442                 for (i = 0; i < font->charcount; i++) {
2443                         for (j = 0; j < vc->vc_font.height; j++) {
2444                                 *data++ = fontdata[0];
2445                                 *data++ = fontdata[1];
2446                                 *data++ = fontdata[2];
2447                                 fontdata += sizeof(u32);
2448                         }
2449                         memset(data, 0, 3 * (32 - j));
2450                         data += 3 * (32 - j);
2451                 }
2452         } else {
2453                 j = vc->vc_font.height * 4;
2454                 for (i = 0; i < font->charcount; i++) {
2455                         memcpy(data, fontdata, j);
2456                         memset(data + j, 0, 128 - j);
2457                         data += 128;
2458                         fontdata += j;
2459                 }
2460         }
2461         return 0;
2462 }
2463
2464 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2465                              const u8 * data, int userfont)
2466 {
2467         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2468         struct fbcon_ops *ops = info->fbcon_par;
2469         struct display *p = &fb_display[vc->vc_num];
2470         int resize;
2471         int cnt;
2472         char *old_data = NULL;
2473
2474         if (CON_IS_VISIBLE(vc) && softback_lines)
2475                 fbcon_set_origin(vc);
2476
2477         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2478         if (p->userfont)
2479                 old_data = vc->vc_font.data;
2480         if (userfont)
2481                 cnt = FNTCHARCNT(data);
2482         else
2483                 cnt = 256;
2484         vc->vc_font.data = (void *)(p->fontdata = data);
2485         if ((p->userfont = userfont))
2486                 REFCOUNT(data)++;
2487         vc->vc_font.width = w;
2488         vc->vc_font.height = h;
2489         if (vc->vc_hi_font_mask && cnt == 256) {
2490                 vc->vc_hi_font_mask = 0;
2491                 if (vc->vc_can_do_color) {
2492                         vc->vc_complement_mask >>= 1;
2493                         vc->vc_s_complement_mask >>= 1;
2494                 }
2495
2496                 /* ++Edmund: reorder the attribute bits */
2497                 if (vc->vc_can_do_color) {
2498                         unsigned short *cp =
2499                             (unsigned short *) vc->vc_origin;
2500                         int count = vc->vc_screenbuf_size / 2;
2501                         unsigned short c;
2502                         for (; count > 0; count--, cp++) {
2503                                 c = scr_readw(cp);
2504                                 scr_writew(((c & 0xfe00) >> 1) |
2505                                            (c & 0xff), cp);
2506                         }
2507                         c = vc->vc_video_erase_char;
2508                         vc->vc_video_erase_char =
2509                             ((c & 0xfe00) >> 1) | (c & 0xff);
2510                         vc->vc_attr >>= 1;
2511                 }
2512         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2513                 vc->vc_hi_font_mask = 0x100;
2514                 if (vc->vc_can_do_color) {
2515                         vc->vc_complement_mask <<= 1;
2516                         vc->vc_s_complement_mask <<= 1;
2517                 }
2518
2519                 /* ++Edmund: reorder the attribute bits */
2520                 {
2521                         unsigned short *cp =
2522                             (unsigned short *) vc->vc_origin;
2523                         int count = vc->vc_screenbuf_size / 2;
2524                         unsigned short c;
2525                         for (; count > 0; count--, cp++) {
2526                                 unsigned short newc;
2527                                 c = scr_readw(cp);
2528                                 if (vc->vc_can_do_color)
2529                                         newc =
2530                                             ((c & 0xff00) << 1) | (c &
2531                                                                    0xff);
2532                                 else
2533                                         newc = c & ~0x100;
2534                                 scr_writew(newc, cp);
2535                         }
2536                         c = vc->vc_video_erase_char;
2537                         if (vc->vc_can_do_color) {
2538                                 vc->vc_video_erase_char =
2539                                     ((c & 0xff00) << 1) | (c & 0xff);
2540                                 vc->vc_attr <<= 1;
2541                         } else
2542                                 vc->vc_video_erase_char = c & ~0x100;
2543                 }
2544
2545         }
2546
2547         if (resize) {
2548                 int cols, rows;
2549
2550                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2551                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2552                 cols /= w;
2553                 rows /= h;
2554                 vc_resize(vc, cols, rows);
2555                 if (CON_IS_VISIBLE(vc) && softback_buf)
2556                         fbcon_update_softback(vc);
2557         } else if (CON_IS_VISIBLE(vc)
2558                    && vc->vc_mode == KD_TEXT) {
2559                 fbcon_clear_margins(vc, 0);
2560                 update_screen(vc);
2561         }
2562
2563         if (old_data && (--REFCOUNT(old_data) == 0))
2564                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2565         return 0;
2566 }
2567
2568 static int fbcon_copy_font(struct vc_data *vc, int con)
2569 {
2570         struct display *od = &fb_display[con];
2571         struct console_font *f = &vc->vc_font;
2572
2573         if (od->fontdata == f->data)
2574                 return 0;       /* already the same font... */
2575         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2576 }
2577
2578 /*
2579  *  User asked to set font; we are guaranteed that
2580  *      a) width and height are in range 1..32
2581  *      b) charcount does not exceed 512
2582  *  but lets not assume that, since someone might someday want to use larger
2583  *  fonts. And charcount of 512 is small for unicode support.
2584  *
2585  *  However, user space gives the font in 32 rows , regardless of
2586  *  actual font height. So a new API is needed if support for larger fonts
2587  *  is ever implemented.
2588  */
2589
2590 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2591 {
2592         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2593         unsigned charcount = font->charcount;
2594         int w = font->width;
2595         int h = font->height;
2596         int size;
2597         int i, csum;
2598         u8 *new_data, *data = font->data;
2599         int pitch = (font->width+7) >> 3;
2600
2601         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2602          * If not this check should be changed to charcount < 256 */
2603         if (charcount != 256 && charcount != 512)
2604                 return -EINVAL;
2605
2606         /* Make sure drawing engine can handle the font */
2607         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2608             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2609                 return -EINVAL;
2610
2611         /* Make sure driver can handle the font length */
2612         if (fbcon_invalid_charcount(info, charcount))
2613                 return -EINVAL;
2614
2615         size = h * pitch * charcount;
2616
2617         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2618
2619         if (!new_data)
2620                 return -ENOMEM;
2621
2622         new_data += FONT_EXTRA_WORDS * sizeof(int);
2623         FNTSIZE(new_data) = size;
2624         FNTCHARCNT(new_data) = charcount;
2625         REFCOUNT(new_data) = 0; /* usage counter */
2626         for (i=0; i< charcount; i++) {
2627                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2628         }
2629
2630         /* Since linux has a nice crc32 function use it for counting font
2631          * checksums. */
2632         csum = crc32(0, new_data, size);
2633
2634         FNTSUM(new_data) = csum;
2635         /* Check if the same font is on some other console already */
2636         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2637                 struct vc_data *tmp = vc_cons[i].d;
2638
2639                 if (fb_display[i].userfont &&
2640                     fb_display[i].fontdata &&
2641                     FNTSUM(fb_display[i].fontdata) == csum &&
2642                     FNTSIZE(fb_display[i].fontdata) == size &&
2643                     tmp->vc_font.width == w &&
2644                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2645                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2646                         new_data = (u8 *)fb_display[i].fontdata;
2647                         break;
2648                 }
2649         }
2650         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2651 }
2652
2653 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2654 {
2655         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2656         const struct font_desc *f;
2657
2658         if (!name)
2659                 f = get_default_font(info->var.xres, info->var.yres,
2660                                      info->pixmap.blit_x, info->pixmap.blit_y);
2661         else if (!(f = find_font(name)))
2662                 return -ENOENT;
2663
2664         font->width = f->width;
2665         font->height = f->height;
2666         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2667 }
2668
2669 static u16 palette_red[16];
2670 static u16 palette_green[16];
2671 static u16 palette_blue[16];
2672
2673 static struct fb_cmap palette_cmap = {
2674         0, 16, palette_red, palette_green, palette_blue, NULL
2675 };
2676
2677 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2678 {
2679         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2680         int i, j, k, depth;
2681         u8 val;
2682
2683         if (fbcon_is_inactive(vc, info))
2684                 return -EINVAL;
2685
2686         if (!CON_IS_VISIBLE(vc))
2687                 return 0;
2688
2689         depth = fb_get_color_depth(&info->var, &info->fix);
2690         if (depth > 3) {
2691                 for (i = j = 0; i < 16; i++) {
2692                         k = table[i];
2693                         val = vc->vc_palette[j++];
2694                         palette_red[k] = (val << 8) | val;
2695                         val = vc->vc_palette[j++];
2696                         palette_green[k] = (val << 8) | val;
2697                         val = vc->vc_palette[j++];
2698                         palette_blue[k] = (val << 8) | val;
2699                 }
2700                 palette_cmap.len = 16;
2701                 palette_cmap.start = 0;
2702         /*
2703          * If framebuffer is capable of less than 16 colors,
2704          * use default palette of fbcon.
2705          */
2706         } else
2707                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2708
2709         return fb_set_cmap(&palette_cmap, info);
2710 }
2711
2712 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2713 {
2714         unsigned long p;
2715         int line;
2716
2717         if (vc->vc_num != fg_console || !softback_lines)
2718                 return (u16 *) (vc->vc_origin + offset);
2719         line = offset / vc->vc_size_row;
2720         if (line >= softback_lines)
2721                 return (u16 *) (vc->vc_origin + offset -
2722                                 softback_lines * vc->vc_size_row);
2723         p = softback_curr + offset;
2724         if (p >= softback_end)
2725                 p += softback_buf - softback_end;
2726         return (u16 *) p;
2727 }
2728
2729 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2730                                  int *px, int *py)
2731 {
2732         unsigned long ret;
2733         int x, y;
2734
2735         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2736                 unsigned long offset = (pos - vc->vc_origin) / 2;
2737
2738                 x = offset % vc->vc_cols;
2739                 y = offset / vc->vc_cols;
2740                 if (vc->vc_num == fg_console)
2741                         y += softback_lines;
2742                 ret = pos + (vc->vc_cols - x) * 2;
2743         } else if (vc->vc_num == fg_console && softback_lines) {
2744                 unsigned long offset = pos - softback_curr;
2745
2746                 if (pos < softback_curr)
2747                         offset += softback_end - softback_buf;
2748                 offset /= 2;
2749                 x = offset % vc->vc_cols;
2750                 y = offset / vc->vc_cols;
2751                 ret = pos + (vc->vc_cols - x) * 2;
2752                 if (ret == softback_end)
2753                         ret = softback_buf;
2754                 if (ret == softback_in)
2755                         ret = vc->vc_origin;
2756         } else {
2757                 /* Should not happen */
2758                 x = y = 0;
2759                 ret = vc->vc_origin;
2760         }
2761         if (px)
2762                 *px = x;
2763         if (py)
2764                 *py = y;
2765         return ret;
2766 }
2767
2768 /* As we might be inside of softback, we may work with non-contiguous buffer,
2769    that's why we have to use a separate routine. */
2770 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2771 {
2772         while (cnt--) {
2773                 u16 a = scr_readw(p);
2774                 if (!vc->vc_can_do_color)
2775                         a ^= 0x0800;
2776                 else if (vc->vc_hi_font_mask == 0x100)
2777                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2778                             (((a) & 0x0e00) << 4);
2779                 else
2780                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2781                             (((a) & 0x0700) << 4);
2782                 scr_writew(a, p++);
2783                 if (p == (u16 *) softback_end)
2784                         p = (u16 *) softback_buf;
2785                 if (p == (u16 *) softback_in)
2786                         p = (u16 *) vc->vc_origin;
2787         }
2788 }
2789
2790 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2791 {
2792         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2793         struct fbcon_ops *ops = info->fbcon_par;
2794         struct display *disp = &fb_display[fg_console];
2795         int offset, limit, scrollback_old;
2796
2797         if (softback_top) {
2798                 if (vc->vc_num != fg_console)
2799                         return 0;
2800                 if (vc->vc_mode != KD_TEXT || !lines)
2801                         return 0;
2802                 if (logo_shown >= 0) {
2803                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2804
2805                         if (conp2->vc_top == logo_lines
2806                             && conp2->vc_bottom == conp2->vc_rows)
2807                                 conp2->vc_top = 0;
2808                         if (logo_shown == vc->vc_num) {
2809                                 unsigned long p, q;
2810                                 int i;
2811
2812                                 p = softback_in;
2813                                 q = vc->vc_origin +
2814                                     logo_lines * vc->vc_size_row;
2815                                 for (i = 0; i < logo_lines; i++) {
2816                                         if (p == softback_top)
2817                                                 break;
2818                                         if (p == softback_buf)
2819                                                 p = softback_end;
2820                                         p -= vc->vc_size_row;
2821                                         q -= vc->vc_size_row;
2822                                         scr_memcpyw((u16 *) q, (u16 *) p,
2823                                                     vc->vc_size_row);
2824                                 }
2825                                 softback_in = softback_curr = p;
2826                                 update_region(vc, vc->vc_origin,
2827                                               logo_lines * vc->vc_cols);
2828                         }
2829                         logo_shown = FBCON_LOGO_CANSHOW;
2830                 }
2831                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2832                 fbcon_redraw_softback(vc, disp, lines);
2833                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2834                 return 0;
2835         }
2836
2837         if (!scrollback_phys_max)
2838                 return -ENOSYS;
2839
2840         scrollback_old = scrollback_current;
2841         scrollback_current -= lines;
2842         if (scrollback_current < 0)
2843                 scrollback_current = 0;
2844         else if (scrollback_current > scrollback_max)
2845                 scrollback_current = scrollback_max;
2846         if (scrollback_current == scrollback_old)
2847                 return 0;
2848
2849         if (fbcon_is_inactive(vc, info))
2850                 return 0;
2851
2852         fbcon_cursor(vc, CM_ERASE);
2853
2854         offset = disp->yscroll - scrollback_current;
2855         limit = disp->vrows;
2856         switch (disp->scrollmode) {
2857         case SCROLL_WRAP_MOVE:
2858                 info->var.vmode |= FB_VMODE_YWRAP;
2859                 break;
2860         case SCROLL_PAN_MOVE:
2861         case SCROLL_PAN_REDRAW:
2862                 limit -= vc->vc_rows;
2863                 info->var.vmode &= ~FB_VMODE_YWRAP;
2864                 break;
2865         }
2866         if (offset < 0)
2867                 offset += limit;
2868         else if (offset >= limit)
2869                 offset -= limit;
2870
2871         ops->var.xoffset = 0;
2872         ops->var.yoffset = offset * vc->vc_font.height;
2873         ops->update_start(info);
2874
2875         if (!scrollback_current)
2876                 fbcon_cursor(vc, CM_DRAW);
2877         return 0;
2878 }
2879
2880 static int fbcon_set_origin(struct vc_data *vc)
2881 {
2882         if (softback_lines)
2883                 fbcon_scrolldelta(vc, softback_lines);
2884         return 0;
2885 }
2886
2887 static void fbcon_suspended(struct fb_info *info)
2888 {
2889         struct vc_data *vc = NULL;
2890         struct fbcon_ops *ops = info->fbcon_par;
2891
2892         if (!ops || ops->currcon < 0)
2893                 return;
2894         vc = vc_cons[ops->currcon].d;
2895
2896         /* Clear cursor, restore saved data */
2897         fbcon_cursor(vc, CM_ERASE);
2898 }
2899
2900 static void fbcon_resumed(struct fb_info *info)
2901 {
2902         struct vc_data *vc;
2903         struct fbcon_ops *ops = info->fbcon_par;
2904
2905         if (!ops || ops->currcon < 0)
2906                 return;
2907         vc = vc_cons[ops->currcon].d;
2908
2909         update_screen(vc);
2910 }
2911
2912 static void fbcon_modechanged(struct fb_info *info)
2913 {
2914         struct fbcon_ops *ops = info->fbcon_par;
2915         struct vc_data *vc;
2916         struct display *p;
2917         int rows, cols;
2918
2919         if (!ops || ops->currcon < 0)
2920                 return;
2921         vc = vc_cons[ops->currcon].d;
2922         if (vc->vc_mode != KD_TEXT ||
2923             registered_fb[con2fb_map[ops->currcon]] != info)
2924                 return;
2925
2926         p = &fb_display[vc->vc_num];
2927         set_blitting_type(vc, info);
2928
2929         if (CON_IS_VISIBLE(vc)) {
2930                 var_to_display(p, &info->var, info);
2931                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2932                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2933                 cols /= vc->vc_font.width;
2934                 rows /= vc->vc_font.height;
2935                 vc_resize(vc, cols, rows);
2936                 updatescrollmode(p, info, vc);
2937                 scrollback_max = 0;
2938                 scrollback_current = 0;
2939
2940                 if (!fbcon_is_inactive(vc, info)) {
2941                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2942                     ops->update_start(info);
2943                 }
2944
2945                 fbcon_set_palette(vc, color_table);
2946                 update_screen(vc);
2947                 if (softback_buf)
2948                         fbcon_update_softback(vc);
2949         }
2950 }
2951
2952 static void fbcon_set_all_vcs(struct fb_info *info)
2953 {
2954         struct fbcon_ops *ops = info->fbcon_par;
2955         struct vc_data *vc;
2956         struct display *p;
2957         int i, rows, cols, fg = -1;
2958
2959         if (!ops || ops->currcon < 0)
2960                 return;
2961
2962         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2963                 vc = vc_cons[i].d;
2964                 if (!vc || vc->vc_mode != KD_TEXT ||
2965                     registered_fb[con2fb_map[i]] != info)
2966                         continue;
2967
2968                 if (CON_IS_VISIBLE(vc)) {
2969                         fg = i;
2970                         continue;
2971                 }
2972
2973                 p = &fb_display[vc->vc_num];
2974                 set_blitting_type(vc, info);
2975                 var_to_display(p, &info->var, info);
2976                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2977                 rows = FBCON_SWAP(p->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         }
2982
2983         if (fg != -1)
2984                 fbcon_modechanged(info);
2985 }
2986
2987 static int fbcon_mode_deleted(struct fb_info *info,
2988                               struct fb_videomode *mode)
2989 {
2990         struct fb_info *fb_info;
2991         struct display *p;
2992         int i, j, found = 0;
2993
2994         /* before deletion, ensure that mode is not in use */
2995         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2996                 j = con2fb_map[i];
2997                 if (j == -1)
2998                         continue;
2999                 fb_info = registered_fb[j];
3000                 if (fb_info != info)
3001                         continue;
3002                 p = &fb_display[i];
3003                 if (!p || !p->mode)
3004                         continue;
3005                 if (fb_mode_is_equal(p->mode, mode)) {
3006                         found = 1;
3007                         break;
3008                 }
3009         }
3010         return found;
3011 }
3012
3013 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3014 static int fbcon_unbind(void)
3015 {
3016         int ret;
3017
3018         ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3019                                 fbcon_is_default);
3020         return ret;
3021 }
3022 #else
3023 static inline int fbcon_unbind(void)
3024 {
3025         return -EINVAL;
3026 }
3027 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3028
3029 static int fbcon_fb_unbind(int idx)
3030 {
3031         int i, new_idx = -1, ret = 0;
3032
3033         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3034                 if (con2fb_map[i] != idx &&
3035                     con2fb_map[i] != -1) {
3036                         new_idx = i;
3037                         break;
3038                 }
3039         }
3040
3041         if (new_idx != -1) {
3042                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3043                         if (con2fb_map[i] == idx)
3044                                 set_con2fb_map(i, new_idx, 0);
3045                 }
3046         } else
3047                 ret = fbcon_unbind();
3048
3049         return ret;
3050 }
3051
3052 static int fbcon_fb_unregistered(struct fb_info *info)
3053 {
3054         int i, idx = info->node;
3055
3056         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3057                 if (con2fb_map[i] == idx)
3058                         con2fb_map[i] = -1;
3059         }
3060
3061         if (idx == info_idx) {
3062                 info_idx = -1;
3063
3064                 for (i = 0; i < FB_MAX; i++) {
3065                         if (registered_fb[i] != NULL) {
3066                                 info_idx = i;
3067                                 break;
3068                         }
3069                 }
3070         }
3071
3072         if (info_idx != -1) {
3073                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3074                         if (con2fb_map[i] == -1)
3075                                 con2fb_map[i] = info_idx;
3076                 }
3077         }
3078
3079         if (!num_registered_fb)
3080                 unregister_con_driver(&fb_con);
3081
3082
3083         if (primary_device == idx)
3084                 primary_device = -1;
3085
3086         return 0;
3087 }
3088
3089 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3090 static void fbcon_select_primary(struct fb_info *info)
3091 {
3092         if (!map_override && primary_device == -1 &&
3093             fb_is_primary_device(info)) {
3094                 int i;
3095
3096                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3097                        info->fix.id, info->node);
3098                 primary_device = info->node;
3099
3100                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3101                         con2fb_map_boot[i] = primary_device;
3102
3103                 if (con_is_bound(&fb_con)) {
3104                         printk(KERN_INFO "fbcon: Remapping primary device, "
3105                                "fb%i, to tty %i-%i\n", info->node,
3106                                first_fb_vc + 1, last_fb_vc + 1);
3107                         info_idx = primary_device;
3108                 }
3109         }
3110
3111 }
3112 #else
3113 static inline void fbcon_select_primary(struct fb_info *info)
3114 {
3115         return;
3116 }
3117 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3118
3119 static int fbcon_fb_registered(struct fb_info *info)
3120 {
3121         int ret = 0, i, idx = info->node;
3122
3123         fbcon_select_primary(info);
3124
3125         if (info_idx == -1) {
3126                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3127                         if (con2fb_map_boot[i] == idx) {
3128                                 info_idx = idx;
3129                                 break;
3130                         }
3131                 }
3132
3133                 if (info_idx != -1)
3134                         ret = fbcon_takeover(1);
3135         } else {
3136                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3137                         if (con2fb_map_boot[i] == idx)
3138                                 set_con2fb_map(i, idx, 0);
3139                 }
3140         }
3141
3142         return ret;
3143 }
3144
3145 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3146 {
3147         struct fbcon_ops *ops = info->fbcon_par;
3148         struct vc_data *vc;
3149
3150         if (!ops || ops->currcon < 0)
3151                 return;
3152
3153         vc = vc_cons[ops->currcon].d;
3154         if (vc->vc_mode != KD_TEXT ||
3155                         registered_fb[con2fb_map[ops->currcon]] != info)
3156                 return;
3157
3158         if (CON_IS_VISIBLE(vc)) {
3159                 if (blank)
3160                         do_blank_screen(0);
3161                 else
3162                         do_unblank_screen(0);
3163         }
3164         ops->blank_state = blank;
3165 }
3166
3167 static void fbcon_new_modelist(struct fb_info *info)
3168 {
3169         int i;
3170         struct vc_data *vc;
3171         struct fb_var_screeninfo var;
3172         const struct fb_videomode *mode;
3173
3174         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3175                 if (registered_fb[con2fb_map[i]] != info)
3176                         continue;
3177                 if (!fb_display[i].mode)
3178                         continue;
3179                 vc = vc_cons[i].d;
3180                 display_to_var(&var, &fb_display[i]);
3181                 mode = fb_find_nearest_mode(fb_display[i].mode,
3182                                             &info->modelist);
3183                 fb_videomode_to_var(&var, mode);
3184                 fbcon_set_disp(info, &var, vc->vc_num);
3185         }
3186 }
3187
3188 static void fbcon_get_requirement(struct fb_info *info,
3189                                   struct fb_blit_caps *caps)
3190 {
3191         struct vc_data *vc;
3192         struct display *p;
3193
3194         if (caps->flags) {
3195                 int i, charcnt;
3196
3197                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3198                         vc = vc_cons[i].d;
3199                         if (vc && vc->vc_mode == KD_TEXT &&
3200                             info->node == con2fb_map[i]) {
3201                                 p = &fb_display[i];
3202                                 caps->x |= 1 << (vc->vc_font.width - 1);
3203                                 caps->y |= 1 << (vc->vc_font.height - 1);
3204                                 charcnt = (p->userfont) ?
3205                                         FNTCHARCNT(p->fontdata) : 256;
3206                                 if (caps->len < charcnt)
3207                                         caps->len = charcnt;
3208                         }
3209                 }
3210         } else {
3211                 vc = vc_cons[fg_console].d;
3212
3213                 if (vc && vc->vc_mode == KD_TEXT &&
3214                     info->node == con2fb_map[fg_console]) {
3215                         p = &fb_display[fg_console];
3216                         caps->x = 1 << (vc->vc_font.width - 1);
3217                         caps->y = 1 << (vc->vc_font.height - 1);
3218                         caps->len = (p->userfont) ?
3219                                 FNTCHARCNT(p->fontdata) : 256;
3220                 }
3221         }
3222 }
3223
3224 static int fbcon_event_notify(struct notifier_block *self,
3225                               unsigned long action, void *data)
3226 {
3227         struct fb_event *event = data;
3228         struct fb_info *info = event->info;
3229         struct fb_videomode *mode;
3230         struct fb_con2fbmap *con2fb;
3231         struct fb_blit_caps *caps;
3232         int ret = 0;
3233
3234         /*
3235          * ignore all events except driver registration and deregistration
3236          * if fbcon is not active
3237          */
3238         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3239                                   action == FB_EVENT_FB_UNREGISTERED))
3240                 goto done;
3241
3242         switch(action) {
3243         case FB_EVENT_SUSPEND:
3244                 fbcon_suspended(info);
3245                 break;
3246         case FB_EVENT_RESUME:
3247                 fbcon_resumed(info);
3248                 break;
3249         case FB_EVENT_MODE_CHANGE:
3250                 fbcon_modechanged(info);
3251                 break;
3252         case FB_EVENT_MODE_CHANGE_ALL:
3253                 fbcon_set_all_vcs(info);
3254                 break;
3255         case FB_EVENT_MODE_DELETE:
3256                 mode = event->data;
3257                 ret = fbcon_mode_deleted(info, mode);
3258                 break;
3259         case FB_EVENT_FB_UNBIND:
3260                 ret = fbcon_fb_unbind(info->node);
3261                 break;
3262         case FB_EVENT_FB_REGISTERED:
3263                 ret = fbcon_fb_registered(info);
3264                 break;
3265         case FB_EVENT_FB_UNREGISTERED:
3266                 ret = fbcon_fb_unregistered(info);
3267                 break;
3268         case FB_EVENT_SET_CONSOLE_MAP:
3269                 con2fb = event->data;
3270                 ret = set_con2fb_map(con2fb->console - 1,
3271                                      con2fb->framebuffer, 1);
3272                 break;
3273         case FB_EVENT_GET_CONSOLE_MAP:
3274                 con2fb = event->data;
3275                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3276                 break;
3277         case FB_EVENT_BLANK:
3278                 fbcon_fb_blanked(info, *(int *)event->data);
3279                 break;
3280         case FB_EVENT_NEW_MODELIST:
3281                 fbcon_new_modelist(info);
3282                 break;
3283         case FB_EVENT_GET_REQ:
3284                 caps = event->data;
3285                 fbcon_get_requirement(info, caps);
3286                 break;
3287         }
3288
3289 done:
3290         return ret;
3291 }
3292
3293 /*
3294  *  The console `switch' structure for the frame buffer based console
3295  */
3296
3297 static const struct consw fb_con = {
3298         .owner                  = THIS_MODULE,
3299         .con_startup            = fbcon_startup,
3300         .con_init               = fbcon_init,
3301         .con_deinit             = fbcon_deinit,
3302         .con_clear              = fbcon_clear,
3303         .con_putc               = fbcon_putc,
3304         .con_putcs              = fbcon_putcs,
3305         .con_cursor             = fbcon_cursor,
3306         .con_scroll             = fbcon_scroll,
3307         .con_bmove              = fbcon_bmove,
3308         .con_switch             = fbcon_switch,
3309         .con_blank              = fbcon_blank,
3310         .con_font_set           = fbcon_set_font,
3311         .con_font_get           = fbcon_get_font,
3312         .con_font_default       = fbcon_set_def_font,
3313         .con_font_copy          = fbcon_copy_font,
3314         .con_set_palette        = fbcon_set_palette,
3315         .con_scrolldelta        = fbcon_scrolldelta,
3316         .con_set_origin         = fbcon_set_origin,
3317         .con_invert_region      = fbcon_invert_region,
3318         .con_screen_pos         = fbcon_screen_pos,
3319         .con_getxy              = fbcon_getxy,
3320         .con_resize             = fbcon_resize,
3321 };
3322
3323 static struct notifier_block fbcon_event_notifier = {
3324         .notifier_call  = fbcon_event_notify,
3325 };
3326
3327 static ssize_t store_rotate(struct device *device,
3328                             struct device_attribute *attr, const char *buf,
3329                             size_t count)
3330 {
3331         struct fb_info *info;
3332         int rotate, idx;
3333         char **last = NULL;
3334
3335         if (fbcon_has_exited)
3336                 return count;
3337
3338         acquire_console_sem();
3339         idx = con2fb_map[fg_console];
3340
3341         if (idx == -1 || registered_fb[idx] == NULL)
3342                 goto err;
3343
3344         info = registered_fb[idx];
3345         rotate = simple_strtoul(buf, last, 0);
3346         fbcon_rotate(info, rotate);
3347 err:
3348         release_console_sem();
3349         return count;
3350 }
3351
3352 static ssize_t store_rotate_all(struct device *device,
3353                                 struct device_attribute *attr,const char *buf,
3354                                 size_t count)
3355 {
3356         struct fb_info *info;
3357         int rotate, idx;
3358         char **last = NULL;
3359
3360         if (fbcon_has_exited)
3361                 return count;
3362
3363         acquire_console_sem();
3364         idx = con2fb_map[fg_console];
3365
3366         if (idx == -1 || registered_fb[idx] == NULL)
3367                 goto err;
3368
3369         info = registered_fb[idx];
3370         rotate = simple_strtoul(buf, last, 0);
3371         fbcon_rotate_all(info, rotate);
3372 err:
3373         release_console_sem();
3374         return count;
3375 }
3376
3377 static ssize_t show_rotate(struct device *device,
3378                            struct device_attribute *attr,char *buf)
3379 {
3380         struct fb_info *info;
3381         int rotate = 0, idx;
3382
3383         if (fbcon_has_exited)
3384                 return 0;
3385
3386         acquire_console_sem();
3387         idx = con2fb_map[fg_console];
3388
3389         if (idx == -1 || registered_fb[idx] == NULL)
3390                 goto err;
3391
3392         info = registered_fb[idx];
3393         rotate = fbcon_get_rotate(info);
3394 err:
3395         release_console_sem();
3396         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3397 }
3398
3399 static ssize_t show_cursor_blink(struct device *device,
3400                                  struct device_attribute *attr, char *buf)
3401 {
3402         struct fb_info *info;
3403         struct fbcon_ops *ops;
3404         int idx, blink = -1;
3405
3406         if (fbcon_has_exited)
3407                 return 0;
3408
3409         acquire_console_sem();
3410         idx = con2fb_map[fg_console];
3411
3412         if (idx == -1 || registered_fb[idx] == NULL)
3413                 goto err;
3414
3415         info = registered_fb[idx];
3416         ops = info->fbcon_par;
3417
3418         if (!ops)
3419                 goto err;
3420
3421         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3422 err:
3423         release_console_sem();
3424         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3425 }
3426
3427 static ssize_t store_cursor_blink(struct device *device,
3428                                   struct device_attribute *attr,
3429                                   const char *buf, size_t count)
3430 {
3431         struct fb_info *info;
3432         int blink, idx;
3433         char **last = NULL;
3434
3435         if (fbcon_has_exited)
3436                 return count;
3437
3438         acquire_console_sem();
3439         idx = con2fb_map[fg_console];
3440
3441         if (idx == -1 || registered_fb[idx] == NULL)
3442                 goto err;
3443
3444         info = registered_fb[idx];
3445
3446         if (!info->fbcon_par)
3447                 goto err;
3448
3449         blink = simple_strtoul(buf, last, 0);
3450
3451         if (blink) {
3452                 fbcon_cursor_noblink = 0;
3453                 fbcon_add_cursor_timer(info);
3454         } else {
3455                 fbcon_cursor_noblink = 1;
3456                 fbcon_del_cursor_timer(info);
3457         }
3458
3459 err:
3460         release_console_sem();
3461         return count;
3462 }
3463
3464 static struct device_attribute device_attrs[] = {
3465         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3466         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3467         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3468                store_cursor_blink),
3469 };
3470
3471 static int fbcon_init_device(void)
3472 {
3473         int i, error = 0;
3474
3475         fbcon_has_sysfs = 1;
3476
3477         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3478                 error = device_create_file(fbcon_device, &device_attrs[i]);
3479
3480                 if (error)
3481                         break;
3482         }
3483
3484         if (error) {
3485                 while (--i >= 0)
3486                         device_remove_file(fbcon_device, &device_attrs[i]);
3487
3488                 fbcon_has_sysfs = 0;
3489         }
3490
3491         return 0;
3492 }
3493
3494 static void fbcon_start(void)
3495 {
3496         if (num_registered_fb) {
3497                 int i;
3498
3499                 acquire_console_sem();
3500
3501                 for (i = 0; i < FB_MAX; i++) {
3502                         if (registered_fb[i] != NULL) {
3503                                 info_idx = i;
3504                                 break;
3505                         }
3506                 }
3507
3508                 release_console_sem();
3509                 fbcon_takeover(0);
3510         }
3511 }
3512
3513 static void fbcon_exit(void)
3514 {
3515         struct fb_info *info;
3516         int i, j, mapped;
3517
3518         if (fbcon_has_exited)
3519                 return;
3520
3521 #ifdef CONFIG_ATARI
3522         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3523 #endif
3524 #ifdef CONFIG_MAC
3525         if (MACH_IS_MAC && vbl_detected)
3526                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3527 #endif
3528
3529         kfree((void *)softback_buf);
3530         softback_buf = 0UL;
3531
3532         for (i = 0; i < FB_MAX; i++) {
3533                 mapped = 0;
3534                 info = registered_fb[i];
3535
3536                 if (info == NULL)
3537                         continue;
3538
3539                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3540                         if (con2fb_map[j] == i)
3541                                 mapped = 1;
3542                 }
3543
3544                 if (mapped) {
3545                         if (info->fbops->fb_release)
3546                                 info->fbops->fb_release(info, 0);
3547                         module_put(info->fbops->owner);
3548
3549                         if (info->fbcon_par) {
3550                                 struct fbcon_ops *ops = info->fbcon_par;
3551
3552                                 fbcon_del_cursor_timer(info);
3553                                 kfree(ops->cursor_src);
3554                                 kfree(info->fbcon_par);
3555                                 info->fbcon_par = NULL;
3556                         }
3557
3558                         if (info->queue.func == fb_flashcursor)
3559                                 info->queue.func = NULL;
3560                 }
3561         }
3562
3563         fbcon_has_exited = 1;
3564 }
3565
3566 static int __init fb_console_init(void)
3567 {
3568         int i;
3569
3570         acquire_console_sem();
3571         fb_register_client(&fbcon_event_notifier);
3572         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3573
3574         if (IS_ERR(fbcon_device)) {
3575                 printk(KERN_WARNING "Unable to create device "
3576                        "for fbcon; errno = %ld\n",
3577                        PTR_ERR(fbcon_device));
3578                 fbcon_device = NULL;
3579         } else
3580                 fbcon_init_device();
3581
3582         for (i = 0; i < MAX_NR_CONSOLES; i++)
3583                 con2fb_map[i] = -1;
3584
3585         release_console_sem();
3586         fbcon_start();
3587         return 0;
3588 }
3589
3590 module_init(fb_console_init);
3591
3592 #ifdef MODULE
3593
3594 static void __exit fbcon_deinit_device(void)
3595 {
3596         int i;
3597
3598         if (fbcon_has_sysfs) {
3599                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3600                         device_remove_file(fbcon_device, &device_attrs[i]);
3601
3602                 fbcon_has_sysfs = 0;
3603         }
3604 }
3605
3606 static void __exit fb_console_exit(void)
3607 {
3608         acquire_console_sem();
3609         fb_unregister_client(&fbcon_event_notifier);
3610         fbcon_deinit_device();
3611         device_destroy(fb_class, MKDEV(0, 0));
3612         fbcon_exit();
3613         release_console_sem();
3614         unregister_con_driver(&fb_con);
3615 }
3616
3617 module_exit(fb_console_exit);
3618
3619 #endif
3620
3621 MODULE_LICENSE("GPL");