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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__) || defined(CONFIG_APUS)
  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, __FUNCTION__ , ## 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 rotate;
 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 = ~(0xfff << (max(info->var.green.length,
 338                                           max(info->var.red.length,
 339                                               info->var.blue.length)))) & 0xff;
 340
 341                 /* 0 or 1 */
 342                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 343                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 344
 345                 if (console_blanked)
 346                         fg = bg;
 347
 348                 color = (is_fg) ? fg : bg;
 349                 break;
 350         }
 351         case 2:
 352                 /*
 353                  * Scale down 16-colors to 4 colors. Default 4-color palette
 354                  * is grayscale. However, simply dividing the values by 4
 355                  * will not work, as colors 1, 2 and 3 will be scaled-down
 356                  * to zero rendering them invisible.  So empirically convert
 357                  * colors to a sane 4-level grayscale.
 358                  */
 359                 switch (color) {
 360                 case 0:
 361                         color = 0; /* black */
 362                         break;
 363                 case 1 ... 6:
 364                         color = 2; /* white */
 365                         break;
 366                 case 7 ... 8:
 367                         color = 1; /* gray */
 368                         break;
 369                 default:
 370                         color = 3; /* intense white */
 371                         break;
 372                 }
 373                 break;
 374         case 3:
 375                 /*
 376                  * Last 8 entries of default 16-color palette is a more intense
 377                  * version of the first 8 (i.e., same chrominance, different
 378                  * luminance).
 379                  */
 380                 color &= 7;
 381                 break;
 382         }
 383
 384
 385         return color;
 386 }
 387
 388 static void fbcon_update_softback(struct vc_data *vc)
 389 {
 390         int l = fbcon_softback_size / vc->vc_size_row;
 391
 392         if (l > 5)
 393                 softback_end = softback_buf + l * vc->vc_size_row;
 394         else
 395                 /* Smaller scrollback makes no sense, and 0 would screw
 396                    the operation totally */
 397                 softback_top = 0;
 398 }
 399
 400 static void fb_flashcursor(struct work_struct *work)
 401 {
 402         struct fb_info *info = container_of(work, struct fb_info, queue);
 403         struct fbcon_ops *ops = info->fbcon_par;
 404         struct display *p;
 405         struct vc_data *vc = NULL;
 406         int c;
 407         int mode;
 408
 409         acquire_console_sem();
 410         if (ops && ops->currcon != -1)
 411                 vc = vc_cons[ops->currcon].d;
 412
 413         if (!vc || !CON_IS_VISIBLE(vc) ||
 414             registered_fb[con2fb_map[vc->vc_num]] != info ||
 415             vc->vc_deccm != 1) {
 416                 release_console_sem();
 417                 return;
 418         }
 419
 420         p = &fb_display[vc->vc_num];
 421         c = scr_readw((u16 *) vc->vc_pos);
 422         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 423                 CM_ERASE : CM_DRAW;
 424         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 425                     get_color(vc, info, c, 0));
 426         release_console_sem();
 427 }
 428
 429 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 430 static int cursor_blink_rate;
 431 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 432 {
 433         struct fb_info *info = dev_id;
 434
 435         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 436                 schedule_work(&info->queue);
 437                 vbl_cursor_cnt = cursor_blink_rate;
 438         }
 439         return IRQ_HANDLED;
 440 }
 441 #endif
 442
 443 static void cursor_timer_handler(unsigned long dev_addr)
 444 {
 445         struct fb_info *info = (struct fb_info *) dev_addr;
 446         struct fbcon_ops *ops = info->fbcon_par;
 447
 448         schedule_work(&info->queue);
 449         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 450 }
 451
 452 static void fbcon_add_cursor_timer(struct fb_info *info)
 453 {
 454         struct fbcon_ops *ops = info->fbcon_par;
 455
 456         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 457             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER) &&
 458             !fbcon_cursor_noblink) {
 459                 if (!info->queue.func)
 460                         INIT_WORK(&info->queue, fb_flashcursor);
 461
 462                 init_timer(&ops->cursor_timer);
 463                 ops->cursor_timer.function = cursor_timer_handler;
 464                 ops->cursor_timer.expires = jiffies + HZ / 5;
 465                 ops->cursor_timer.data = (unsigned long ) info;
 466                 add_timer(&ops->cursor_timer);
 467                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 468         }
 469 }
 470
 471 static void fbcon_del_cursor_timer(struct fb_info *info)
 472 {
 473         struct fbcon_ops *ops = info->fbcon_par;
 474
 475         if (info->queue.func == fb_flashcursor &&
 476             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 477                 del_timer_sync(&ops->cursor_timer);
 478                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 479         }
 480 }
 481
 482 #ifndef MODULE
 483 static int __init fb_console_setup(char *this_opt)
 484 {
 485         char *options;
 486         int i, j;
 487
 488         if (!this_opt || !*this_opt)
 489                 return 1;
 490
 491         while ((options = strsep(&this_opt, ",")) != NULL) {
 492                 if (!strncmp(options, "font:", 5))
 493                         strcpy(fontname, options + 5);
 494
 495                 if (!strncmp(options, "scrollback:", 11)) {
 496                         options += 11;
 497                         if (*options) {
 498                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 499                                 if (*options == 'k' || *options == 'K') {
 500                                         fbcon_softback_size *= 1024;
 501                                         options++;
 502                                 }
 503                                 if (*options != ',')
 504                                         return 1;
 505                                 options++;
 506                         } else
 507                                 return 1;
 508                 }
 509
 510                 if (!strncmp(options, "map:", 4)) {
 511                         options += 4;
 512                         if (*options) {
 513                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 514                                         if (!options[j])
 515                                                 j = 0;
 516                                         con2fb_map_boot[i] =
 517                                                 (options[j++]-'0') % FB_MAX;
 518                                 }
 519
 520                                 fbcon_map_override();
 521                         }
 522
 523                         return 1;
 524                 }
 525
 526                 if (!strncmp(options, "vc:", 3)) {
 527                         options += 3;
 528                         if (*options)
 529                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 530                         if (first_fb_vc < 0)
 531                                 first_fb_vc = 0;
 532                         if (*options++ == '-')
 533                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 534                         fbcon_is_default = 0;
 535                 }
 536
 537                 if (!strncmp(options, "rotate:", 7)) {
 538                         options += 7;
 539                         if (*options)
 540                                 rotate = simple_strtoul(options, &options, 0);
 541                         if (rotate > 3)
 542                                 rotate = 0;
 543                 }
 544         }
 545         return 1;
 546 }
 547
 548 __setup("fbcon=", fb_console_setup);
 549 #endif
 550
 551 static int search_fb_in_map(int idx)
 552 {
 553         int i, retval = 0;
 554
 555         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 556                 if (con2fb_map[i] == idx)
 557                         retval = 1;
 558         }
 559         return retval;
 560 }
 561
 562 static int search_for_mapped_con(void)
 563 {
 564         int i, retval = 0;
 565
 566         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 567                 if (con2fb_map[i] != -1)
 568                         retval = 1;
 569         }
 570         return retval;
 571 }
 572
 573 static int fbcon_takeover(int show_logo)
 574 {
 575         int err, i;
 576
 577         if (!num_registered_fb)
 578                 return -ENODEV;
 579
 580         if (!show_logo)
 581                 logo_shown = FBCON_LOGO_DONTSHOW;
 582
 583         for (i = first_fb_vc; i <= last_fb_vc; i++)
 584                 con2fb_map[i] = info_idx;
 585
 586         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 587                                 fbcon_is_default);
 588
 589         if (err) {
 590                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 591                         con2fb_map[i] = -1;
 592                 }
 593                 info_idx = -1;
 594         }
 595
 596         return err;
 597 }
 598
 599 #ifdef MODULE
 600 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 601                                int cols, int rows, int new_cols, int new_rows)
 602 {
 603         logo_shown = FBCON_LOGO_DONTSHOW;
 604 }
 605 #else
 606 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 607                                int cols, int rows, int new_cols, int new_rows)
 608 {
 609         /* Need to make room for the logo */
 610         struct fbcon_ops *ops = info->fbcon_par;
 611         int cnt, erase = vc->vc_video_erase_char, step;
 612         unsigned short *save = NULL, *r, *q;
 613
 614         if (info->flags & FBINFO_MODULE) {
 615                 logo_shown = FBCON_LOGO_DONTSHOW;
 616                 return;
 617         }
 618
 619         /*
 620          * remove underline attribute from erase character
 621          * if black and white framebuffer.
 622          */
 623         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 624                 erase &= ~0x400;
 625         logo_height = fb_prepare_logo(info, ops->rotate);
 626         logo_lines = (logo_height + vc->vc_font.height - 1) /
 627                 vc->vc_font.height;
 628         q = (unsigned short *) (vc->vc_origin +
 629                                 vc->vc_size_row * rows);
 630         step = logo_lines * cols;
 631         for (r = q - logo_lines * cols; r < q; r++)
 632                 if (scr_readw(r) != vc->vc_video_erase_char)
 633                         break;
 634         if (r != q && new_rows >= rows + logo_lines) {
 635                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 636                 if (save) {
 637                         int i = cols < new_cols ? cols : new_cols;
 638                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 639                         r = q - step;
 640                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 641                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 642                         r = q;
 643                 }
 644         }
 645         if (r == q) {
 646                 /* We can scroll screen down */
 647                 r = q - step - cols;
 648                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 649                         scr_memcpyw(r + step, r, vc->vc_size_row);
 650                         r -= cols;
 651                 }
 652                 if (!save) {
 653                         int lines;
 654                         if (vc->vc_y + logo_lines >= rows)
 655                                 lines = rows - vc->vc_y - 1;
 656                         else
 657                                 lines = logo_lines;
 658                         vc->vc_y += lines;
 659                         vc->vc_pos += lines * vc->vc_size_row;
 660                 }
 661         }
 662         scr_memsetw((unsigned short *) vc->vc_origin,
 663                     erase,
 664                     vc->vc_size_row * logo_lines);
 665
 666         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 667                 fbcon_clear_margins(vc, 0);
 668                 update_screen(vc);
 669         }
 670
 671         if (save) {
 672                 q = (unsigned short *) (vc->vc_origin +
 673                                         vc->vc_size_row *
 674                                         rows);
 675                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 676                 vc->vc_y += logo_lines;
 677                 vc->vc_pos += logo_lines * vc->vc_size_row;
 678                 kfree(save);
 679         }
 680
 681         if (logo_lines > vc->vc_bottom) {
 682                 logo_shown = FBCON_LOGO_CANSHOW;
 683                 printk(KERN_INFO
 684                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 685         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 686                 logo_shown = FBCON_LOGO_DRAW;
 687                 vc->vc_top = logo_lines;
 688         }
 689 }
 690 #endif /* MODULE */
 691
 692 #ifdef CONFIG_FB_TILEBLITTING
 693 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 694 {
 695         struct fbcon_ops *ops = info->fbcon_par;
 696
 697         ops->p = &fb_display[vc->vc_num];
 698
 699         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 700                 fbcon_set_tileops(vc, info);
 701         else {
 702                 fbcon_set_rotation(info);
 703                 fbcon_set_bitops(ops);
 704         }
 705 }
 706
 707 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 708 {
 709         int err = 0;
 710
 711         if (info->flags & FBINFO_MISC_TILEBLITTING &&
 712             info->tileops->fb_get_tilemax(info) < charcount)
 713                 err = 1;
 714
 715         return err;
 716 }
 717 #else
 718 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 719 {
 720         struct fbcon_ops *ops = info->fbcon_par;
 721
 722         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 723         ops->p = &fb_display[vc->vc_num];
 724         fbcon_set_rotation(info);
 725         fbcon_set_bitops(ops);
 726 }
 727
 728 static int fbcon_invalid_charcount(struct fb_info *info, unsigned charcount)
 729 {
 730         return 0;
 731 }
 732
 733 #endif /* CONFIG_MISC_TILEBLITTING */
 734
 735
 736 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 737                                   int unit, int oldidx)
 738 {
 739         struct fbcon_ops *ops = NULL;
 740         int err = 0;
 741
 742         if (!try_module_get(info->fbops->owner))
 743                 err = -ENODEV;
 744
 745         if (!err && info->fbops->fb_open &&
 746             info->fbops->fb_open(info, 0))
 747                 err = -ENODEV;
 748
 749         if (!err) {
 750                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 751                 if (!ops)
 752                         err = -ENOMEM;
 753         }
 754
 755         if (!err) {
 756                 info->fbcon_par = ops;
 757
 758                 if (vc)
 759                         set_blitting_type(vc, info);
 760         }
 761
 762         if (err) {
 763                 con2fb_map[unit] = oldidx;
 764                 module_put(info->fbops->owner);
 765         }
 766
 767         return err;
 768 }
 769
 770 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 771                                   struct fb_info *newinfo, int unit,
 772                                   int oldidx, int found)
 773 {
 774         struct fbcon_ops *ops = oldinfo->fbcon_par;
 775         int err = 0;
 776
 777         if (oldinfo->fbops->fb_release &&
 778             oldinfo->fbops->fb_release(oldinfo, 0)) {
 779                 con2fb_map[unit] = oldidx;
 780                 if (!found && newinfo->fbops->fb_release)
 781                         newinfo->fbops->fb_release(newinfo, 0);
 782                 if (!found)
 783                         module_put(newinfo->fbops->owner);
 784                 err = -ENODEV;
 785         }
 786
 787         if (!err) {
 788                 fbcon_del_cursor_timer(oldinfo);
 789                 kfree(ops->cursor_state.mask);
 790                 kfree(ops->cursor_data);
 791                 kfree(ops->fontbuffer);
 792                 kfree(oldinfo->fbcon_par);
 793                 oldinfo->fbcon_par = NULL;
 794                 module_put(oldinfo->fbops->owner);
 795                 /*
 796                   If oldinfo and newinfo are driving the same hardware,
 797                   the fb_release() method of oldinfo may attempt to
 798                   restore the hardware state.  This will leave the
 799                   newinfo in an undefined state. Thus, a call to
 800                   fb_set_par() may be needed for the newinfo.
 801                 */
 802                 if (newinfo->fbops->fb_set_par)
 803                         newinfo->fbops->fb_set_par(newinfo);
 804         }
 805
 806         return err;
 807 }
 808
 809 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 810                                 int unit, int show_logo)
 811 {
 812         struct fbcon_ops *ops = info->fbcon_par;
 813
 814         ops->currcon = fg_console;
 815
 816         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 817                 info->fbops->fb_set_par(info);
 818
 819         ops->flags |= FBCON_FLAGS_INIT;
 820         ops->graphics = 0;
 821         fbcon_set_disp(info, &info->var, unit);
 822
 823         if (show_logo) {
 824                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 825                 struct fb_info *fg_info =
 826                         registered_fb[con2fb_map[fg_console]];
 827
 828                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 829                                    fg_vc->vc_rows, fg_vc->vc_cols,
 830                                    fg_vc->vc_rows);
 831         }
 832
 833         update_screen(vc_cons[fg_console].d);
 834 }
 835
 836 /**
 837  *      set_con2fb_map - map console to frame buffer device
 838  *      @unit: virtual console number to map
 839  *      @newidx: frame buffer index to map virtual console to
 840  *      @user: user request
 841  *
 842  *      Maps a virtual console @unit to a frame buffer device
 843  *      @newidx.
 844  */
 845 static int set_con2fb_map(int unit, int newidx, int user)
 846 {
 847         struct vc_data *vc = vc_cons[unit].d;
 848         int oldidx = con2fb_map[unit];
 849         struct fb_info *info = registered_fb[newidx];
 850         struct fb_info *oldinfo = NULL;
 851         int found, err = 0;
 852
 853         if (oldidx == newidx)
 854                 return 0;
 855
 856         if (!info || fbcon_has_exited)
 857                 return -EINVAL;
 858
 859         if (!err && !search_for_mapped_con()) {
 860                 info_idx = newidx;
 861                 return fbcon_takeover(0);
 862         }
 863
 864         if (oldidx != -1)
 865                 oldinfo = registered_fb[oldidx];
 866
 867         found = search_fb_in_map(newidx);
 868
 869         acquire_console_sem();
 870         con2fb_map[unit] = newidx;
 871         if (!err && !found)
 872                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 873
 874
 875         /*
 876          * If old fb is not mapped to any of the consoles,
 877          * fbcon should release it.
 878          */
 879         if (!err && oldinfo && !search_fb_in_map(oldidx))
 880                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 881                                              found);
 882
 883         if (!err) {
 884                 int show_logo = (fg_console == 0 && !user &&
 885                                  logo_shown != FBCON_LOGO_DONTSHOW);
 886
 887                 if (!found)
 888                         fbcon_add_cursor_timer(info);
 889                 con2fb_map_boot[unit] = newidx;
 890                 con2fb_init_display(vc, info, unit, show_logo);
 891         }
 892
 893         if (!search_fb_in_map(info_idx))
 894                 info_idx = newidx;
 895
 896         release_console_sem();
 897         return err;
 898 }
 899
 900 /*
 901  *  Low Level Operations
 902  */
 903 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 904 static int var_to_display(struct display *disp,
 905                           struct fb_var_screeninfo *var,
 906                           struct fb_info *info)
 907 {
 908         disp->xres_virtual = var->xres_virtual;
 909         disp->yres_virtual = var->yres_virtual;
 910         disp->bits_per_pixel = var->bits_per_pixel;
 911         disp->grayscale = var->grayscale;
 912         disp->nonstd = var->nonstd;
 913         disp->accel_flags = var->accel_flags;
 914         disp->height = var->height;
 915         disp->width = var->width;
 916         disp->red = var->red;
 917         disp->green = var->green;
 918         disp->blue = var->blue;
 919         disp->transp = var->transp;
 920         disp->rotate = var->rotate;
 921         disp->mode = fb_match_mode(var, &info->modelist);
 922         if (disp->mode == NULL)
 923                 /* This should not happen */
 924                 return -EINVAL;
 925         return 0;
 926 }
 927
 928 static void display_to_var(struct fb_var_screeninfo *var,
 929                            struct display *disp)
 930 {
 931         fb_videomode_to_var(var, disp->mode);
 932         var->xres_virtual = disp->xres_virtual;
 933         var->yres_virtual = disp->yres_virtual;
 934         var->bits_per_pixel = disp->bits_per_pixel;
 935         var->grayscale = disp->grayscale;
 936         var->nonstd = disp->nonstd;
 937         var->accel_flags = disp->accel_flags;
 938         var->height = disp->height;
 939         var->width = disp->width;
 940         var->red = disp->red;
 941         var->green = disp->green;
 942         var->blue = disp->blue;
 943         var->transp = disp->transp;
 944         var->rotate = disp->rotate;
 945 }
 946
 947 static const char *fbcon_startup(void)
 948 {
 949         const char *display_desc = "frame buffer device";
 950         struct display *p = &fb_display[fg_console];
 951         struct vc_data *vc = vc_cons[fg_console].d;
 952         const struct font_desc *font = NULL;
 953         struct module *owner;
 954         struct fb_info *info = NULL;
 955         struct fbcon_ops *ops;
 956         int rows, cols;
 957         int irqres;
 958
 959         irqres = 1;
 960         /*
 961          *  If num_registered_fb is zero, this is a call for the dummy part.
 962          *  The frame buffer devices weren't initialized yet.
 963          */
 964         if (!num_registered_fb || info_idx == -1)
 965                 return display_desc;
 966         /*
 967          * Instead of blindly using registered_fb[0], we use info_idx, set by
 968          * fb_console_init();
 969          */
 970         info = registered_fb[info_idx];
 971         if (!info)
 972                 return NULL;
 973
 974         owner = info->fbops->owner;
 975         if (!try_module_get(owner))
 976                 return NULL;
 977         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 978                 module_put(owner);
 979                 return NULL;
 980         }
 981
 982         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 983         if (!ops) {
 984                 module_put(owner);
 985                 return NULL;
 986         }
 987
 988         ops->currcon = -1;
 989         ops->graphics = 1;
 990         ops->cur_rotate = -1;
 991         info->fbcon_par = ops;
 992         p->con_rotate = rotate;
 993         set_blitting_type(vc, info);
 994
 995         if (info->fix.type != FB_TYPE_TEXT) {
 996                 if (fbcon_softback_size) {
 997                         if (!softback_buf) {
 998                                 softback_buf =
 999                                     (unsigned long)
1000                                     kmalloc(fbcon_softback_size,
1001                                             GFP_KERNEL);
1002                                 if (!softback_buf) {
1003                                         fbcon_softback_size = 0;
1004                                         softback_top = 0;
1005                                 }
1006                         }
1007                 } else {
1008                         if (softback_buf) {
1009                                 kfree((void *) softback_buf);
1010                                 softback_buf = 0;
1011                                 softback_top = 0;
1012                         }
1013                 }
1014                 if (softback_buf)
1015                         softback_in = softback_top = softback_curr =
1016                             softback_buf;
1017                 softback_lines = 0;
1018         }
1019
1020         /* Setup default font */
1021         if (!p->fontdata) {
1022                 if (!fontname[0] || !(font = find_font(fontname)))
1023                         font = get_default_font(info->var.xres,
1024                                                 info->var.yres,
1025                                                 info->pixmap.blit_x,
1026                                                 info->pixmap.blit_y);
1027                 vc->vc_font.width = font->width;
1028                 vc->vc_font.height = font->height;
1029                 vc->vc_font.data = (void *)(p->fontdata = font->data);
1030                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
1031         }
1032
1033         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1034         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1035         cols /= vc->vc_font.width;
1036         rows /= vc->vc_font.height;
1037         vc_resize(vc, cols, rows);
1038
1039         DPRINTK("mode:   %s\n", info->fix.id);
1040         DPRINTK("visual: %d\n", info->fix.visual);
1041         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1042                 info->var.yres,
1043                 info->var.bits_per_pixel);
1044
1045 #ifdef CONFIG_ATARI
1046         if (MACH_IS_ATARI) {
1047                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1048                 irqres =
1049                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1050                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1051                                 info);
1052         }
1053 #endif                          /* CONFIG_ATARI */
1054
1055 #ifdef CONFIG_MAC
1056         /*
1057          * On a Macintoy, the VBL interrupt may or may not be active.
1058          * As interrupt based cursor is more reliable and race free, we
1059          * probe for VBL interrupts.
1060          */
1061         if (MACH_IS_MAC) {
1062                 int ct = 0;
1063                 /*
1064                  * Probe for VBL: set temp. handler ...
1065                  */
1066                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1067                                      "framebuffer vbl", info);
1068                 vbl_detected = 0;
1069
1070                 /*
1071                  * ... and spin for 20 ms ...
1072                  */
1073                 while (!vbl_detected && ++ct < 1000)
1074                         udelay(20);
1075
1076                 if (ct == 1000)
1077                         printk
1078                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1079
1080                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1081
1082                 if (vbl_detected) {
1083                         /*
1084                          * interrupt based cursor ok
1085                          */
1086                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1087                         irqres =
1088                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1089                                         "framebuffer vbl", info);
1090                 } else {
1091                         /*
1092                          * VBL not detected: fall through, use timer based cursor
1093                          */
1094                         irqres = 1;
1095                 }
1096         }
1097 #endif                          /* CONFIG_MAC */
1098
1099         fbcon_add_cursor_timer(info);
1100         fbcon_has_exited = 0;
1101         return display_desc;
1102 }
1103
1104 static void fbcon_init(struct vc_data *vc, int init)
1105 {
1106         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1107         struct fbcon_ops *ops;
1108         struct vc_data **default_mode = vc->vc_display_fg;
1109         struct vc_data *svc = *default_mode;
1110         struct display *t, *p = &fb_display[vc->vc_num];
1111         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1112         int cap;
1113
1114         if (info_idx == -1 || info == NULL)
1115             return;
1116
1117         cap = info->flags;
1118
1119         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1120             (info->fix.type == FB_TYPE_TEXT))
1121                 logo = 0;
1122
1123         if (var_to_display(p, &info->var, info))
1124                 return;
1125
1126         if (!info->fbcon_par)
1127                 con2fb_acquire_newinfo(vc, info, vc->vc_num, -1);
1128
1129         /* If we are not the first console on this
1130            fb, copy the font from that console */
1131         t = &fb_display[fg_console];
1132         if (!p->fontdata) {
1133                 if (t->fontdata) {
1134                         struct vc_data *fvc = vc_cons[fg_console].d;
1135
1136                         vc->vc_font.data = (void *)(p->fontdata =
1137                                                     fvc->vc_font.data);
1138                         vc->vc_font.width = fvc->vc_font.width;
1139                         vc->vc_font.height = fvc->vc_font.height;
1140                         p->userfont = t->userfont;
1141
1142                         if (p->userfont)
1143                                 REFCOUNT(p->fontdata)++;
1144                 } else {
1145                         const struct font_desc *font = NULL;
1146
1147                         if (!fontname[0] || !(font = find_font(fontname)))
1148                                 font = get_default_font(info->var.xres,
1149                                                         info->var.yres,
1150                                                         info->pixmap.blit_x,
1151                                                         info->pixmap.blit_y);
1152                         vc->vc_font.width = font->width;
1153                         vc->vc_font.height = font->height;
1154                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1155                         vc->vc_font.charcount = 256; /* FIXME  Need to
1156                                                         support more fonts */
1157                 }
1158         }
1159
1160         if (p->userfont)
1161                 charcnt = FNTCHARCNT(p->fontdata);
1162
1163         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1164         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1165         if (charcnt == 256) {
1166                 vc->vc_hi_font_mask = 0;
1167         } else {
1168                 vc->vc_hi_font_mask = 0x100;
1169                 if (vc->vc_can_do_color)
1170                         vc->vc_complement_mask <<= 1;
1171         }
1172
1173         if (!*svc->vc_uni_pagedir_loc)
1174                 con_set_default_unimap(svc);
1175         if (!*vc->vc_uni_pagedir_loc)
1176                 con_copy_unimap(vc, svc);
1177
1178         ops = info->fbcon_par;
1179         p->con_rotate = rotate;
1180         set_blitting_type(vc, info);
1181
1182         cols = vc->vc_cols;
1183         rows = vc->vc_rows;
1184         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1185         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1186         new_cols /= vc->vc_font.width;
1187         new_rows /= vc->vc_font.height;
1188         vc_resize(vc, new_cols, new_rows);
1189
1190         /*
1191          * We must always set the mode. The mode of the previous console
1192          * driver could be in the same resolution but we are using different
1193          * hardware so we have to initialize the hardware.
1194          *
1195          * We need to do it in fbcon_init() to prevent screen corruption.
1196          */
1197         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1198                 if (info->fbops->fb_set_par &&
1199                     !(ops->flags & FBCON_FLAGS_INIT))
1200                         info->fbops->fb_set_par(info);
1201                 ops->flags |= FBCON_FLAGS_INIT;
1202         }
1203
1204         ops->graphics = 0;
1205
1206         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1207             !(cap & FBINFO_HWACCEL_DISABLED))
1208                 p->scrollmode = SCROLL_MOVE;
1209         else /* default to something safe */
1210                 p->scrollmode = SCROLL_REDRAW;
1211
1212         /*
1213          *  ++guenther: console.c:vc_allocate() relies on initializing
1214          *  vc_{cols,rows}, but we must not set those if we are only
1215          *  resizing the console.
1216          */
1217         if (!init) {
1218                 vc->vc_cols = new_cols;
1219                 vc->vc_rows = new_rows;
1220         }
1221
1222         if (logo)
1223                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1224
1225         if (vc == svc && softback_buf)
1226                 fbcon_update_softback(vc);
1227
1228         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1229                 ops->rotate = FB_ROTATE_UR;
1230                 set_blitting_type(vc, info);
1231         }
1232
1233         ops->p = &fb_display[fg_console];
1234 }
1235
1236 static void fbcon_free_font(struct display *p)
1237 {
1238         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1239                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1240         p->fontdata = NULL;
1241         p->userfont = 0;
1242 }
1243
1244 static void fbcon_deinit(struct vc_data *vc)
1245 {
1246         struct display *p = &fb_display[vc->vc_num];
1247         struct fb_info *info;
1248         struct fbcon_ops *ops;
1249         int idx;
1250
1251         fbcon_free_font(p);
1252         idx = con2fb_map[vc->vc_num];
1253
1254         if (idx == -1)
1255                 goto finished;
1256
1257         info = registered_fb[idx];
1258
1259         if (!info)
1260                 goto finished;
1261
1262         ops = info->fbcon_par;
1263
1264         if (!ops)
1265                 goto finished;
1266
1267         if (CON_IS_VISIBLE(vc))
1268                 fbcon_del_cursor_timer(info);
1269
1270         ops->flags &= ~FBCON_FLAGS_INIT;
1271 finished:
1272
1273         if (!con_is_bound(&fb_con))
1274                 fbcon_exit();
1275
1276         return;
1277 }
1278
1279 /* ====================================================================== */
1280
1281 /*  fbcon_XXX routines - interface used by the world
1282  *
1283  *  This system is now divided into two levels because of complications
1284  *  caused by hardware scrolling. Top level functions:
1285  *
1286  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1287  *
1288  *  handles y values in range [0, scr_height-1] that correspond to real
1289  *  screen positions. y_wrap shift means that first line of bitmap may be
1290  *  anywhere on this display. These functions convert lineoffsets to
1291  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1292  *
1293  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1294  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1295  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1296  *
1297  *  WARNING:
1298  *
1299  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1300  *  Implies should only really hardware scroll in rows. Only reason for
1301  *  restriction is simplicity & efficiency at the moment.
1302  */
1303
1304 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1305                         int width)
1306 {
1307         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1308         struct fbcon_ops *ops = info->fbcon_par;
1309
1310         struct display *p = &fb_display[vc->vc_num];
1311         u_int y_break;
1312
1313         if (fbcon_is_inactive(vc, info))
1314                 return;
1315
1316         if (!height || !width)
1317                 return;
1318
1319         /* Split blits that cross physical y_wrap boundary */
1320
1321         y_break = p->vrows - p->yscroll;
1322         if (sy < y_break && sy + height - 1 >= y_break) {
1323                 u_int b = y_break - sy;
1324                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1325                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1326                                  width);
1327         } else
1328                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1329 }
1330
1331 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1332                         int count, int ypos, int xpos)
1333 {
1334         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1335         struct display *p = &fb_display[vc->vc_num];
1336         struct fbcon_ops *ops = info->fbcon_par;
1337
1338         if (!fbcon_is_inactive(vc, info))
1339                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1340                            get_color(vc, info, scr_readw(s), 1),
1341                            get_color(vc, info, scr_readw(s), 0));
1342 }
1343
1344 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1345 {
1346         unsigned short chr;
1347
1348         scr_writew(c, &chr);
1349         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1350 }
1351
1352 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1353 {
1354         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1355         struct fbcon_ops *ops = info->fbcon_par;
1356
1357         if (!fbcon_is_inactive(vc, info))
1358                 ops->clear_margins(vc, info, bottom_only);
1359 }
1360
1361 static void fbcon_cursor(struct vc_data *vc, int mode)
1362 {
1363         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1364         struct fbcon_ops *ops = info->fbcon_par;
1365         int y;
1366         int c = scr_readw((u16 *) vc->vc_pos);
1367
1368         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1369                 return;
1370
1371         if (vc->vc_cursor_type & 0x10)
1372                 fbcon_del_cursor_timer(info);
1373         else
1374                 fbcon_add_cursor_timer(info);
1375
1376         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1377         if (mode & CM_SOFTBACK) {
1378                 mode &= ~CM_SOFTBACK;
1379                 y = softback_lines;
1380         } else {
1381                 if (softback_lines)
1382                         fbcon_set_origin(vc);
1383                 y = 0;
1384         }
1385
1386         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1387                     get_color(vc, info, c, 0));
1388         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1389 }
1390
1391 static int scrollback_phys_max = 0;
1392 static int scrollback_max = 0;
1393 static int scrollback_current = 0;
1394
1395 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1396                            int unit)
1397 {
1398         struct display *p, *t;
1399         struct vc_data **default_mode, *vc;
1400         struct vc_data *svc;
1401         struct fbcon_ops *ops = info->fbcon_par;
1402         int rows, cols, charcnt = 256;
1403
1404         p = &fb_display[unit];
1405
1406         if (var_to_display(p, var, info))
1407                 return;
1408
1409         vc = vc_cons[unit].d;
1410
1411         if (!vc)
1412                 return;
1413
1414         default_mode = vc->vc_display_fg;
1415         svc = *default_mode;
1416         t = &fb_display[svc->vc_num];
1417
1418         if (!vc->vc_font.data) {
1419                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1420                 vc->vc_font.width = (*default_mode)->vc_font.width;
1421                 vc->vc_font.height = (*default_mode)->vc_font.height;
1422                 p->userfont = t->userfont;
1423                 if (p->userfont)
1424                         REFCOUNT(p->fontdata)++;
1425         }
1426         if (p->userfont)
1427                 charcnt = FNTCHARCNT(p->fontdata);
1428
1429         var->activate = FB_ACTIVATE_NOW;
1430         info->var.activate = var->activate;
1431         var->yoffset = info->var.yoffset;
1432         var->xoffset = info->var.xoffset;
1433         fb_set_var(info, var);
1434         ops->var = info->var;
1435         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1436         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1437         if (charcnt == 256) {
1438                 vc->vc_hi_font_mask = 0;
1439         } else {
1440                 vc->vc_hi_font_mask = 0x100;
1441                 if (vc->vc_can_do_color)
1442                         vc->vc_complement_mask <<= 1;
1443         }
1444
1445         if (!*svc->vc_uni_pagedir_loc)
1446                 con_set_default_unimap(svc);
1447         if (!*vc->vc_uni_pagedir_loc)
1448                 con_copy_unimap(vc, svc);
1449
1450         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1451         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1452         cols /= vc->vc_font.width;
1453         rows /= vc->vc_font.height;
1454         vc_resize(vc, cols, rows);
1455
1456         if (CON_IS_VISIBLE(vc)) {
1457                 update_screen(vc);
1458                 if (softback_buf)
1459                         fbcon_update_softback(vc);
1460         }
1461 }
1462
1463 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1464 {
1465         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1466         struct fbcon_ops *ops = info->fbcon_par;
1467         struct display *p = &fb_display[vc->vc_num];
1468
1469         p->yscroll += count;
1470         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1471                 p->yscroll -= p->vrows;
1472         ops->var.xoffset = 0;
1473         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1474         ops->var.vmode |= FB_VMODE_YWRAP;
1475         ops->update_start(info);
1476         scrollback_max += count;
1477         if (scrollback_max > scrollback_phys_max)
1478                 scrollback_max = scrollback_phys_max;
1479         scrollback_current = 0;
1480 }
1481
1482 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1483 {
1484         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1485         struct fbcon_ops *ops = info->fbcon_par;
1486         struct display *p = &fb_display[vc->vc_num];
1487
1488         p->yscroll -= count;
1489         if (p->yscroll < 0)     /* Deal with wrap */
1490                 p->yscroll += p->vrows;
1491         ops->var.xoffset = 0;
1492         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1493         ops->var.vmode |= FB_VMODE_YWRAP;
1494         ops->update_start(info);
1495         scrollback_max -= count;
1496         if (scrollback_max < 0)
1497                 scrollback_max = 0;
1498         scrollback_current = 0;
1499 }
1500
1501 static __inline__ void ypan_up(struct vc_data *vc, int count)
1502 {
1503         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1504         struct display *p = &fb_display[vc->vc_num];
1505         struct fbcon_ops *ops = info->fbcon_par;
1506
1507         p->yscroll += count;
1508         if (p->yscroll > p->vrows - vc->vc_rows) {
1509                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1510                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1511                 p->yscroll -= p->vrows - vc->vc_rows;
1512         }
1513
1514         ops->var.xoffset = 0;
1515         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1516         ops->var.vmode &= ~FB_VMODE_YWRAP;
1517         ops->update_start(info);
1518         fbcon_clear_margins(vc, 1);
1519         scrollback_max += count;
1520         if (scrollback_max > scrollback_phys_max)
1521                 scrollback_max = scrollback_phys_max;
1522         scrollback_current = 0;
1523 }
1524
1525 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1526 {
1527         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1528         struct fbcon_ops *ops = info->fbcon_par;
1529         struct display *p = &fb_display[vc->vc_num];
1530
1531         p->yscroll += count;
1532
1533         if (p->yscroll > p->vrows - vc->vc_rows) {
1534                 p->yscroll -= p->vrows - vc->vc_rows;
1535                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1536         }
1537
1538         ops->var.xoffset = 0;
1539         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1540         ops->var.vmode &= ~FB_VMODE_YWRAP;
1541         ops->update_start(info);
1542         fbcon_clear_margins(vc, 1);
1543         scrollback_max += count;
1544         if (scrollback_max > scrollback_phys_max)
1545                 scrollback_max = scrollback_phys_max;
1546         scrollback_current = 0;
1547 }
1548
1549 static __inline__ void ypan_down(struct vc_data *vc, int count)
1550 {
1551         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1552         struct display *p = &fb_display[vc->vc_num];
1553         struct fbcon_ops *ops = info->fbcon_par;
1554
1555         p->yscroll -= count;
1556         if (p->yscroll < 0) {
1557                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1558                             0, vc->vc_rows, vc->vc_cols);
1559                 p->yscroll += p->vrows - vc->vc_rows;
1560         }
1561
1562         ops->var.xoffset = 0;
1563         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1564         ops->var.vmode &= ~FB_VMODE_YWRAP;
1565         ops->update_start(info);
1566         fbcon_clear_margins(vc, 1);
1567         scrollback_max -= count;
1568         if (scrollback_max < 0)
1569                 scrollback_max = 0;
1570         scrollback_current = 0;
1571 }
1572
1573 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1574 {
1575         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1576         struct fbcon_ops *ops = info->fbcon_par;
1577         struct display *p = &fb_display[vc->vc_num];
1578
1579         p->yscroll -= count;
1580
1581         if (p->yscroll < 0) {
1582                 p->yscroll += p->vrows - vc->vc_rows;
1583                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1584         }
1585
1586         ops->var.xoffset = 0;
1587         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1588         ops->var.vmode &= ~FB_VMODE_YWRAP;
1589         ops->update_start(info);
1590         fbcon_clear_margins(vc, 1);
1591         scrollback_max -= count;
1592         if (scrollback_max < 0)
1593                 scrollback_max = 0;
1594         scrollback_current = 0;
1595 }
1596
1597 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1598                                   long delta)
1599 {
1600         int count = vc->vc_rows;
1601         unsigned short *d, *s;
1602         unsigned long n;
1603         int line = 0;
1604
1605         d = (u16 *) softback_curr;
1606         if (d == (u16 *) softback_in)
1607                 d = (u16 *) vc->vc_origin;
1608         n = softback_curr + delta * vc->vc_size_row;
1609         softback_lines -= delta;
1610         if (delta < 0) {
1611                 if (softback_curr < softback_top && n < softback_buf) {
1612                         n += softback_end - softback_buf;
1613                         if (n < softback_top) {
1614                                 softback_lines -=
1615                                     (softback_top - n) / vc->vc_size_row;
1616                                 n = softback_top;
1617                         }
1618                 } else if (softback_curr >= softback_top
1619                            && n < softback_top) {
1620                         softback_lines -=
1621                             (softback_top - n) / vc->vc_size_row;
1622                         n = softback_top;
1623                 }
1624         } else {
1625                 if (softback_curr > softback_in && n >= softback_end) {
1626                         n += softback_buf - softback_end;
1627                         if (n > softback_in) {
1628                                 n = softback_in;
1629                                 softback_lines = 0;
1630                         }
1631                 } else if (softback_curr <= softback_in && n > softback_in) {
1632                         n = softback_in;
1633                         softback_lines = 0;
1634                 }
1635         }
1636         if (n == softback_curr)
1637                 return;
1638         softback_curr = n;
1639         s = (u16 *) softback_curr;
1640         if (s == (u16 *) softback_in)
1641                 s = (u16 *) vc->vc_origin;
1642         while (count--) {
1643                 unsigned short *start;
1644                 unsigned short *le;
1645                 unsigned short c;
1646                 int x = 0;
1647                 unsigned short attr = 1;
1648
1649                 start = s;
1650                 le = advance_row(s, 1);
1651                 do {
1652                         c = scr_readw(s);
1653                         if (attr != (c & 0xff00)) {
1654                                 attr = c & 0xff00;
1655                                 if (s > start) {
1656                                         fbcon_putcs(vc, start, s - start,
1657                                                     line, x);
1658                                         x += s - start;
1659                                         start = s;
1660                                 }
1661                         }
1662                         if (c == scr_readw(d)) {
1663                                 if (s > start) {
1664                                         fbcon_putcs(vc, start, s - start,
1665                                                     line, x);
1666                                         x += s - start + 1;
1667                                         start = s + 1;
1668                                 } else {
1669                                         x++;
1670                                         start++;
1671                                 }
1672                         }
1673                         s++;
1674                         d++;
1675                 } while (s < le);
1676                 if (s > start)
1677                         fbcon_putcs(vc, start, s - start, line, x);
1678                 line++;
1679                 if (d == (u16 *) softback_end)
1680                         d = (u16 *) softback_buf;
1681                 if (d == (u16 *) softback_in)
1682                         d = (u16 *) vc->vc_origin;
1683                 if (s == (u16 *) softback_end)
1684                         s = (u16 *) softback_buf;
1685                 if (s == (u16 *) softback_in)
1686                         s = (u16 *) vc->vc_origin;
1687         }
1688 }
1689
1690 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1691                               int line, int count, int dy)
1692 {
1693         unsigned short *s = (unsigned short *)
1694                 (vc->vc_origin + vc->vc_size_row * line);
1695
1696         while (count--) {
1697                 unsigned short *start = s;
1698                 unsigned short *le = advance_row(s, 1);
1699                 unsigned short c;
1700                 int x = 0;
1701                 unsigned short attr = 1;
1702
1703                 do {
1704                         c = scr_readw(s);
1705                         if (attr != (c & 0xff00)) {
1706                                 attr = c & 0xff00;
1707                                 if (s > start) {
1708                                         fbcon_putcs(vc, start, s - start,
1709                                                     dy, x);
1710                                         x += s - start;
1711                                         start = s;
1712                                 }
1713                         }
1714                         console_conditional_schedule();
1715                         s++;
1716                 } while (s < le);
1717                 if (s > start)
1718                         fbcon_putcs(vc, start, s - start, dy, x);
1719                 console_conditional_schedule();
1720                 dy++;
1721         }
1722 }
1723
1724 static void fbcon_redraw_blit(struct vc_data *vc, struct fb_info *info,
1725                         struct display *p, int line, int count, int ycount)
1726 {
1727         int offset = ycount * vc->vc_cols;
1728         unsigned short *d = (unsigned short *)
1729             (vc->vc_origin + vc->vc_size_row * line);
1730         unsigned short *s = d + offset;
1731         struct fbcon_ops *ops = info->fbcon_par;
1732
1733         while (count--) {
1734                 unsigned short *start = s;
1735                 unsigned short *le = advance_row(s, 1);
1736                 unsigned short c;
1737                 int x = 0;
1738
1739                 do {
1740                         c = scr_readw(s);
1741
1742                         if (c == scr_readw(d)) {
1743                                 if (s > start) {
1744                                         ops->bmove(vc, info, line + ycount, x,
1745                                                    line, x, 1, s-start);
1746                                         x += s - start + 1;
1747                                         start = s + 1;
1748                                 } else {
1749                                         x++;
1750                                         start++;
1751                                 }
1752                         }
1753
1754                         scr_writew(c, d);
1755                         console_conditional_schedule();
1756                         s++;
1757                         d++;
1758                 } while (s < le);
1759                 if (s > start)
1760                         ops->bmove(vc, info, line + ycount, x, line, x, 1,
1761                                    s-start);
1762                 console_conditional_schedule();
1763                 if (ycount > 0)
1764                         line++;
1765                 else {
1766                         line--;
1767                         /* NOTE: We subtract two lines from these pointers */
1768                         s -= vc->vc_size_row;
1769                         d -= vc->vc_size_row;
1770                 }
1771         }
1772 }
1773
1774 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1775                          int line, int count, int offset)
1776 {
1777         unsigned short *d = (unsigned short *)
1778             (vc->vc_origin + vc->vc_size_row * line);
1779         unsigned short *s = d + offset;
1780
1781         while (count--) {
1782                 unsigned short *start = s;
1783                 unsigned short *le = advance_row(s, 1);
1784                 unsigned short c;
1785                 int x = 0;
1786                 unsigned short attr = 1;
1787
1788                 do {
1789                         c = scr_readw(s);
1790                         if (attr != (c & 0xff00)) {
1791                                 attr = c & 0xff00;
1792                                 if (s > start) {
1793                                         fbcon_putcs(vc, start, s - start,
1794                                                     line, x);
1795                                         x += s - start;
1796                                         start = s;
1797                                 }
1798                         }
1799                         if (c == scr_readw(d)) {
1800                                 if (s > start) {
1801                                         fbcon_putcs(vc, start, s - start,
1802                                                      line, x);
1803                                         x += s - start + 1;
1804                                         start = s + 1;
1805                                 } else {
1806                                         x++;
1807                                         start++;
1808                                 }
1809                         }
1810                         scr_writew(c, d);
1811                         console_conditional_schedule();
1812                         s++;
1813                         d++;
1814                 } while (s < le);
1815                 if (s > start)
1816                         fbcon_putcs(vc, start, s - start, line, x);
1817                 console_conditional_schedule();
1818                 if (offset > 0)
1819                         line++;
1820                 else {
1821                         line--;
1822                         /* NOTE: We subtract two lines from these pointers */
1823                         s -= vc->vc_size_row;
1824                         d -= vc->vc_size_row;
1825                 }
1826         }
1827 }
1828
1829 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1830                                        int count)
1831 {
1832         unsigned short *p;
1833
1834         if (vc->vc_num != fg_console)
1835                 return;
1836         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1837
1838         while (count) {
1839                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1840                 count--;
1841                 p = advance_row(p, 1);
1842                 softback_in += vc->vc_size_row;
1843                 if (softback_in == softback_end)
1844                         softback_in = softback_buf;
1845                 if (softback_in == softback_top) {
1846                         softback_top += vc->vc_size_row;
1847                         if (softback_top == softback_end)
1848                                 softback_top = softback_buf;
1849                 }
1850         }
1851         softback_curr = softback_in;
1852 }
1853
1854 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1855                         int count)
1856 {
1857         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1858         struct display *p = &fb_display[vc->vc_num];
1859         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1860
1861         if (fbcon_is_inactive(vc, info))
1862                 return -EINVAL;
1863
1864         fbcon_cursor(vc, CM_ERASE);
1865
1866         /*
1867          * ++Geert: Only use ywrap/ypan if the console is in text mode
1868          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1869          *           whole screen (prevents flicker).
1870          */
1871
1872         switch (dir) {
1873         case SM_UP:
1874                 if (count > vc->vc_rows)        /* Maximum realistic size */
1875                         count = vc->vc_rows;
1876                 if (softback_top)
1877                         fbcon_softback_note(vc, t, count);
1878                 if (logo_shown >= 0)
1879                         goto redraw_up;
1880                 switch (p->scrollmode) {
1881                 case SCROLL_MOVE:
1882                         fbcon_redraw_blit(vc, info, p, t, b - t - count,
1883                                      count);
1884                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1885                         scr_memsetw((unsigned short *) (vc->vc_origin +
1886                                                         vc->vc_size_row *
1887                                                         (b - count)),
1888                                     vc->vc_video_erase_char,
1889                                     vc->vc_size_row * count);
1890                         return 1;
1891                         break;
1892
1893                 case SCROLL_WRAP_MOVE:
1894                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1895                                 if (t > 0)
1896                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1897                                                     vc->vc_cols);
1898                                 ywrap_up(vc, count);
1899                                 if (vc->vc_rows - b > 0)
1900                                         fbcon_bmove(vc, b - count, 0, b, 0,
1901                                                     vc->vc_rows - b,
1902                                                     vc->vc_cols);
1903                         } else if (info->flags & FBINFO_READS_FAST)
1904                                 fbcon_bmove(vc, t + count, 0, t, 0,
1905                                             b - t - count, vc->vc_cols);
1906                         else
1907                                 goto redraw_up;
1908                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1909                         break;
1910
1911                 case SCROLL_PAN_REDRAW:
1912                         if ((p->yscroll + count <=
1913                              2 * (p->vrows - vc->vc_rows))
1914                             && ((!scroll_partial && (b - t == vc->vc_rows))
1915                                 || (scroll_partial
1916                                     && (b - t - count >
1917                                         3 * vc->vc_rows >> 2)))) {
1918                                 if (t > 0)
1919                                         fbcon_redraw_move(vc, p, 0, t, count);
1920                                 ypan_up_redraw(vc, t, count);
1921                                 if (vc->vc_rows - b > 0)
1922                                         fbcon_redraw_move(vc, p, b,
1923                                                           vc->vc_rows - b, b);
1924                         } else
1925                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1926                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1927                         break;
1928
1929                 case SCROLL_PAN_MOVE:
1930                         if ((p->yscroll + count <=
1931                              2 * (p->vrows - vc->vc_rows))
1932                             && ((!scroll_partial && (b - t == vc->vc_rows))
1933                                 || (scroll_partial
1934                                     && (b - t - count >
1935                                         3 * vc->vc_rows >> 2)))) {
1936                                 if (t > 0)
1937                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1938                                                     vc->vc_cols);
1939                                 ypan_up(vc, count);
1940                                 if (vc->vc_rows - b > 0)
1941                                         fbcon_bmove(vc, b - count, 0, b, 0,
1942                                                     vc->vc_rows - b,
1943                                                     vc->vc_cols);
1944                         } else if (info->flags & FBINFO_READS_FAST)
1945                                 fbcon_bmove(vc, t + count, 0, t, 0,
1946                                             b - t - count, vc->vc_cols);
1947                         else
1948                                 goto redraw_up;
1949                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1950                         break;
1951
1952                 case SCROLL_REDRAW:
1953                       redraw_up:
1954                         fbcon_redraw(vc, p, t, b - t - count,
1955                                      count * vc->vc_cols);
1956                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1957                         scr_memsetw((unsigned short *) (vc->vc_origin +
1958                                                         vc->vc_size_row *
1959                                                         (b - count)),
1960                                     vc->vc_video_erase_char,
1961                                     vc->vc_size_row * count);
1962                         return 1;
1963                 }
1964                 break;
1965
1966         case SM_DOWN:
1967                 if (count > vc->vc_rows)        /* Maximum realistic size */
1968                         count = vc->vc_rows;
1969                 if (logo_shown >= 0)
1970                         goto redraw_down;
1971                 switch (p->scrollmode) {
1972                 case SCROLL_MOVE:
1973                         fbcon_redraw_blit(vc, info, p, b - 1, b - t - count,
1974                                      -count);
1975                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1976                         scr_memsetw((unsigned short *) (vc->vc_origin +
1977                                                         vc->vc_size_row *
1978                                                         t),
1979                                     vc->vc_video_erase_char,
1980                                     vc->vc_size_row * count);
1981                         return 1;
1982                         break;
1983
1984                 case SCROLL_WRAP_MOVE:
1985                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1986                                 if (vc->vc_rows - b > 0)
1987                                         fbcon_bmove(vc, b, 0, b - count, 0,
1988                                                     vc->vc_rows - b,
1989                                                     vc->vc_cols);
1990                                 ywrap_down(vc, count);
1991                                 if (t > 0)
1992                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1993                                                     vc->vc_cols);
1994                         } else if (info->flags & FBINFO_READS_FAST)
1995                                 fbcon_bmove(vc, t, 0, t + count, 0,
1996                                             b - t - count, vc->vc_cols);
1997                         else
1998                                 goto redraw_down;
1999                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2000                         break;
2001
2002                 case SCROLL_PAN_MOVE:
2003                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2004                             && ((!scroll_partial && (b - t == vc->vc_rows))
2005                                 || (scroll_partial
2006                                     && (b - t - count >
2007                                         3 * vc->vc_rows >> 2)))) {
2008                                 if (vc->vc_rows - b > 0)
2009                                         fbcon_bmove(vc, b, 0, b - count, 0,
2010                                                     vc->vc_rows - b,
2011                                                     vc->vc_cols);
2012                                 ypan_down(vc, count);
2013                                 if (t > 0)
2014                                         fbcon_bmove(vc, count, 0, 0, 0, t,
2015                                                     vc->vc_cols);
2016                         } else if (info->flags & FBINFO_READS_FAST)
2017                                 fbcon_bmove(vc, t, 0, t + count, 0,
2018                                             b - t - count, vc->vc_cols);
2019                         else
2020                                 goto redraw_down;
2021                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2022                         break;
2023
2024                 case SCROLL_PAN_REDRAW:
2025                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
2026                             && ((!scroll_partial && (b - t == vc->vc_rows))
2027                                 || (scroll_partial
2028                                     && (b - t - count >
2029                                         3 * vc->vc_rows >> 2)))) {
2030                                 if (vc->vc_rows - b > 0)
2031                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
2032                                                           b - count);
2033                                 ypan_down_redraw(vc, t, count);
2034                                 if (t > 0)
2035                                         fbcon_redraw_move(vc, p, count, t, 0);
2036                         } else
2037                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
2038                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2039                         break;
2040
2041                 case SCROLL_REDRAW:
2042                       redraw_down:
2043                         fbcon_redraw(vc, p, b - 1, b - t - count,
2044                                      -count * vc->vc_cols);
2045                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
2046                         scr_memsetw((unsigned short *) (vc->vc_origin +
2047                                                         vc->vc_size_row *
2048                                                         t),
2049                                     vc->vc_video_erase_char,
2050                                     vc->vc_size_row * count);
2051                         return 1;
2052                 }
2053         }
2054         return 0;
2055 }
2056
2057
2058 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
2059                         int height, int width)
2060 {
2061         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2062         struct display *p = &fb_display[vc->vc_num];
2063
2064         if (fbcon_is_inactive(vc, info))
2065                 return;
2066
2067         if (!width || !height)
2068                 return;
2069
2070         /*  Split blits that cross physical y_wrap case.
2071          *  Pathological case involves 4 blits, better to use recursive
2072          *  code rather than unrolled case
2073          *
2074          *  Recursive invocations don't need to erase the cursor over and
2075          *  over again, so we use fbcon_bmove_rec()
2076          */
2077         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
2078                         p->vrows - p->yscroll);
2079 }
2080
2081 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
2082                             int dy, int dx, int height, int width, u_int y_break)
2083 {
2084         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2085         struct fbcon_ops *ops = info->fbcon_par;
2086         u_int b;
2087
2088         if (sy < y_break && sy + height > y_break) {
2089                 b = y_break - sy;
2090                 if (dy < sy) {  /* Avoid trashing self */
2091                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2092                                         y_break);
2093                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2094                                         height - b, width, y_break);
2095                 } else {
2096                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2097                                         height - b, width, y_break);
2098                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2099                                         y_break);
2100                 }
2101                 return;
2102         }
2103
2104         if (dy < y_break && dy + height > y_break) {
2105                 b = y_break - dy;
2106                 if (dy < sy) {  /* Avoid trashing self */
2107                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2108                                         y_break);
2109                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2110                                         height - b, width, y_break);
2111                 } else {
2112                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2113                                         height - b, width, y_break);
2114                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2115                                         y_break);
2116                 }
2117                 return;
2118         }
2119         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2120                    height, width);
2121 }
2122
2123 static __inline__ void updatescrollmode(struct display *p,
2124                                         struct fb_info *info,
2125                                         struct vc_data *vc)
2126 {
2127         struct fbcon_ops *ops = info->fbcon_par;
2128         int fh = vc->vc_font.height;
2129         int cap = info->flags;
2130         u16 t = 0;
2131         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2132                                   info->fix.xpanstep);
2133         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2134         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2135         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2136                                    info->var.xres_virtual);
2137         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2138                 divides(ypan, vc->vc_font.height) && vyres > yres;
2139         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2140                 divides(ywrap, vc->vc_font.height) &&
2141                 divides(vc->vc_font.height, vyres) &&
2142                 divides(vc->vc_font.height, yres);
2143         int reading_fast = cap & FBINFO_READS_FAST;
2144         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2145                 !(cap & FBINFO_HWACCEL_DISABLED);
2146         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2147                 !(cap & FBINFO_HWACCEL_DISABLED);
2148
2149         p->vrows = vyres/fh;
2150         if (yres > (fh * (vc->vc_rows + 1)))
2151                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2152         if ((yres % fh) && (vyres % fh < yres % fh))
2153                 p->vrows--;
2154
2155         if (good_wrap || good_pan) {
2156                 if (reading_fast || fast_copyarea)
2157                         p->scrollmode = good_wrap ?
2158                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2159                 else
2160                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2161                                 SCROLL_PAN_REDRAW;
2162         } else {
2163                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2164                         p->scrollmode = SCROLL_MOVE;
2165                 else
2166                         p->scrollmode = SCROLL_REDRAW;
2167         }
2168 }
2169
2170 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2171                         unsigned int height)
2172 {
2173         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2174         struct fbcon_ops *ops = info->fbcon_par;
2175         struct display *p = &fb_display[vc->vc_num];
2176         struct fb_var_screeninfo var = info->var;
2177         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2178
2179         virt_w = FBCON_SWAP(ops->rotate, width, height);
2180         virt_h = FBCON_SWAP(ops->rotate, height, width);
2181         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2182                                  vc->vc_font.height);
2183         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2184                                  vc->vc_font.width);
2185         var.xres = virt_w * virt_fw;
2186         var.yres = virt_h * virt_fh;
2187         x_diff = info->var.xres - var.xres;
2188         y_diff = info->var.yres - var.yres;
2189         if (x_diff < 0 || x_diff > virt_fw ||
2190             y_diff < 0 || y_diff > virt_fh) {
2191                 const struct fb_videomode *mode;
2192
2193                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2194                 mode = fb_find_best_mode(&var, &info->modelist);
2195                 if (mode == NULL)
2196                         return -EINVAL;
2197                 display_to_var(&var, p);
2198                 fb_videomode_to_var(&var, mode);
2199
2200                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2201                         return -EINVAL;
2202
2203                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2204                 if (CON_IS_VISIBLE(vc)) {
2205                         var.activate = FB_ACTIVATE_NOW |
2206                                 FB_ACTIVATE_FORCE;
2207                         fb_set_var(info, &var);
2208                 }
2209                 var_to_display(p, &info->var, info);
2210                 ops->var = info->var;
2211         }
2212         updatescrollmode(p, info, vc);
2213         return 0;
2214 }
2215
2216 static int fbcon_switch(struct vc_data *vc)
2217 {
2218         struct fb_info *info, *old_info = NULL;
2219         struct fbcon_ops *ops;
2220         struct display *p = &fb_display[vc->vc_num];
2221         struct fb_var_screeninfo var;
2222         int i, prev_console, charcnt = 256;
2223
2224         info = registered_fb[con2fb_map[vc->vc_num]];
2225         ops = info->fbcon_par;
2226
2227         if (softback_top) {
2228                 if (softback_lines)
2229                         fbcon_set_origin(vc);
2230                 softback_top = softback_curr = softback_in = softback_buf;
2231                 softback_lines = 0;
2232                 fbcon_update_softback(vc);
2233         }
2234
2235         if (logo_shown >= 0) {
2236                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2237
2238                 if (conp2->vc_top == logo_lines
2239                     && conp2->vc_bottom == conp2->vc_rows)
2240                         conp2->vc_top = 0;
2241                 logo_shown = FBCON_LOGO_CANSHOW;
2242         }
2243
2244         prev_console = ops->currcon;
2245         if (prev_console != -1)
2246                 old_info = registered_fb[con2fb_map[prev_console]];
2247         /*
2248          * FIXME: If we have multiple fbdev's loaded, we need to
2249          * update all info->currcon.  Perhaps, we can place this
2250          * in a centralized structure, but this might break some
2251          * drivers.
2252          *
2253          * info->currcon = vc->vc_num;
2254          */
2255         for (i = 0; i < FB_MAX; i++) {
2256                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2257                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2258
2259                         o->currcon = vc->vc_num;
2260                 }
2261         }
2262         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2263         display_to_var(&var, p);
2264         var.activate = FB_ACTIVATE_NOW;
2265
2266         /*
2267          * make sure we don't unnecessarily trip the memcmp()
2268          * in fb_set_var()
2269          */
2270         info->var.activate = var.activate;
2271         var.yoffset = info->var.yoffset;
2272         var.xoffset = info->var.xoffset;
2273         var.vmode = info->var.vmode;
2274         fb_set_var(info, &var);
2275         ops->var = info->var;
2276
2277         if (old_info != NULL && (old_info != info ||
2278                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2279                 if (info->fbops->fb_set_par)
2280                         info->fbops->fb_set_par(info);
2281
2282                 if (old_info != info)
2283                         fbcon_del_cursor_timer(old_info);
2284         }
2285
2286         if (fbcon_is_inactive(vc, info) ||
2287             ops->blank_state != FB_BLANK_UNBLANK)
2288                 fbcon_del_cursor_timer(info);
2289         else
2290                 fbcon_add_cursor_timer(info);
2291
2292         set_blitting_type(vc, info);
2293         ops->cursor_reset = 1;
2294
2295         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2296                 ops->rotate = FB_ROTATE_UR;
2297                 set_blitting_type(vc, info);
2298         }
2299
2300         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2301         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2302
2303         if (p->userfont)
2304                 charcnt = FNTCHARCNT(vc->vc_font.data);
2305
2306         if (charcnt > 256)
2307                 vc->vc_complement_mask <<= 1;
2308
2309         updatescrollmode(p, info, vc);
2310
2311         switch (p->scrollmode) {
2312         case SCROLL_WRAP_MOVE:
2313                 scrollback_phys_max = p->vrows - vc->vc_rows;
2314                 break;
2315         case SCROLL_PAN_MOVE:
2316         case SCROLL_PAN_REDRAW:
2317                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2318                 if (scrollback_phys_max < 0)
2319                         scrollback_phys_max = 0;
2320                 break;
2321         default:
2322                 scrollback_phys_max = 0;
2323                 break;
2324         }
2325
2326         scrollback_max = 0;
2327         scrollback_current = 0;
2328
2329         if (!fbcon_is_inactive(vc, info)) {
2330             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2331             ops->update_start(info);
2332         }
2333
2334         fbcon_set_palette(vc, color_table);
2335         fbcon_clear_margins(vc, 0);
2336
2337         if (logo_shown == FBCON_LOGO_DRAW) {
2338
2339                 logo_shown = fg_console;
2340                 /* This is protected above by initmem_freed */
2341                 fb_show_logo(info, ops->rotate);
2342                 update_region(vc,
2343                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2344                               vc->vc_size_row * (vc->vc_bottom -
2345                                                  vc->vc_top) / 2);
2346                 return 0;
2347         }
2348         return 1;
2349 }
2350
2351 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2352                                 int blank)
2353 {
2354         struct fb_event event;
2355
2356         if (blank) {
2357                 unsigned short charmask = vc->vc_hi_font_mask ?
2358                         0x1ff : 0xff;
2359                 unsigned short oldc;
2360
2361                 oldc = vc->vc_video_erase_char;
2362                 vc->vc_video_erase_char &= charmask;
2363                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2364                 vc->vc_video_erase_char = oldc;
2365         }
2366
2367
2368         event.info = info;
2369         event.data = &blank;
2370         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2371 }
2372
2373 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2374 {
2375         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2376         struct fbcon_ops *ops = info->fbcon_par;
2377
2378         if (mode_switch) {
2379                 struct fb_var_screeninfo var = info->var;
2380
2381                 ops->graphics = 1;
2382
2383                 if (!blank) {
2384                         if (info->fbops->fb_save_state)
2385                                 info->fbops->fb_save_state(info);
2386                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2387                         fb_set_var(info, &var);
2388                         ops->graphics = 0;
2389                         ops->var = info->var;
2390                 } else if (info->fbops->fb_restore_state)
2391                         info->fbops->fb_restore_state(info);
2392         }
2393
2394         if (!fbcon_is_inactive(vc, info)) {
2395                 if (ops->blank_state != blank) {
2396                         ops->blank_state = blank;
2397                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2398                         ops->cursor_flash = (!blank);
2399
2400                         if (fb_blank(info, blank))
2401                                 fbcon_generic_blank(vc, info, blank);
2402                 }
2403
2404                 if (!blank)
2405                         update_screen(vc);
2406         }
2407
2408         if (fbcon_is_inactive(vc, info) ||
2409             ops->blank_state != FB_BLANK_UNBLANK)
2410                 fbcon_del_cursor_timer(info);
2411         else
2412                 fbcon_add_cursor_timer(info);
2413
2414         return 0;
2415 }
2416
2417 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2418 {
2419         u8 *fontdata = vc->vc_font.data;
2420         u8 *data = font->data;
2421         int i, j;
2422
2423         font->width = vc->vc_font.width;
2424         font->height = vc->vc_font.height;
2425         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2426         if (!font->data)
2427                 return 0;
2428
2429         if (font->width <= 8) {
2430                 j = vc->vc_font.height;
2431                 for (i = 0; i < font->charcount; i++) {
2432                         memcpy(data, fontdata, j);
2433                         memset(data + j, 0, 32 - j);
2434                         data += 32;
2435                         fontdata += j;
2436                 }
2437         } else if (font->width <= 16) {
2438                 j = vc->vc_font.height * 2;
2439                 for (i = 0; i < font->charcount; i++) {
2440                         memcpy(data, fontdata, j);
2441                         memset(data + j, 0, 64 - j);
2442                         data += 64;
2443                         fontdata += j;
2444                 }
2445         } else if (font->width <= 24) {
2446                 for (i = 0; i < font->charcount; i++) {
2447                         for (j = 0; j < vc->vc_font.height; j++) {
2448                                 *data++ = fontdata[0];
2449                                 *data++ = fontdata[1];
2450                                 *data++ = fontdata[2];
2451                                 fontdata += sizeof(u32);
2452                         }
2453                         memset(data, 0, 3 * (32 - j));
2454                         data += 3 * (32 - j);
2455                 }
2456         } else {
2457                 j = vc->vc_font.height * 4;
2458                 for (i = 0; i < font->charcount; i++) {
2459                         memcpy(data, fontdata, j);
2460                         memset(data + j, 0, 128 - j);
2461                         data += 128;
2462                         fontdata += j;
2463                 }
2464         }
2465         return 0;
2466 }
2467
2468 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2469                              const u8 * data, int userfont)
2470 {
2471         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2472         struct fbcon_ops *ops = info->fbcon_par;
2473         struct display *p = &fb_display[vc->vc_num];
2474         int resize;
2475         int cnt;
2476         char *old_data = NULL;
2477
2478         if (CON_IS_VISIBLE(vc) && softback_lines)
2479                 fbcon_set_origin(vc);
2480
2481         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2482         if (p->userfont)
2483                 old_data = vc->vc_font.data;
2484         if (userfont)
2485                 cnt = FNTCHARCNT(data);
2486         else
2487                 cnt = 256;
2488         vc->vc_font.data = (void *)(p->fontdata = data);
2489         if ((p->userfont = userfont))
2490                 REFCOUNT(data)++;
2491         vc->vc_font.width = w;
2492         vc->vc_font.height = h;
2493         if (vc->vc_hi_font_mask && cnt == 256) {
2494                 vc->vc_hi_font_mask = 0;
2495                 if (vc->vc_can_do_color) {
2496                         vc->vc_complement_mask >>= 1;
2497                         vc->vc_s_complement_mask >>= 1;
2498                 }
2499
2500                 /* ++Edmund: reorder the attribute bits */
2501                 if (vc->vc_can_do_color) {
2502                         unsigned short *cp =
2503                             (unsigned short *) vc->vc_origin;
2504                         int count = vc->vc_screenbuf_size / 2;
2505                         unsigned short c;
2506                         for (; count > 0; count--, cp++) {
2507                                 c = scr_readw(cp);
2508                                 scr_writew(((c & 0xfe00) >> 1) |
2509                                            (c & 0xff), cp);
2510                         }
2511                         c = vc->vc_video_erase_char;
2512                         vc->vc_video_erase_char =
2513                             ((c & 0xfe00) >> 1) | (c & 0xff);
2514                         vc->vc_attr >>= 1;
2515                 }
2516         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2517                 vc->vc_hi_font_mask = 0x100;
2518                 if (vc->vc_can_do_color) {
2519                         vc->vc_complement_mask <<= 1;
2520                         vc->vc_s_complement_mask <<= 1;
2521                 }
2522
2523                 /* ++Edmund: reorder the attribute bits */
2524                 {
2525                         unsigned short *cp =
2526                             (unsigned short *) vc->vc_origin;
2527                         int count = vc->vc_screenbuf_size / 2;
2528                         unsigned short c;
2529                         for (; count > 0; count--, cp++) {
2530                                 unsigned short newc;
2531                                 c = scr_readw(cp);
2532                                 if (vc->vc_can_do_color)
2533                                         newc =
2534                                             ((c & 0xff00) << 1) | (c &
2535                                                                    0xff);
2536                                 else
2537                                         newc = c & ~0x100;
2538                                 scr_writew(newc, cp);
2539                         }
2540                         c = vc->vc_video_erase_char;
2541                         if (vc->vc_can_do_color) {
2542                                 vc->vc_video_erase_char =
2543                                     ((c & 0xff00) << 1) | (c & 0xff);
2544                                 vc->vc_attr <<= 1;
2545                         } else
2546                                 vc->vc_video_erase_char = c & ~0x100;
2547                 }
2548
2549         }
2550
2551         if (resize) {
2552                 int cols, rows;
2553
2554                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2555                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2556                 cols /= w;
2557                 rows /= h;
2558                 vc_resize(vc, cols, rows);
2559                 if (CON_IS_VISIBLE(vc) && softback_buf)
2560                         fbcon_update_softback(vc);
2561         } else if (CON_IS_VISIBLE(vc)
2562                    && vc->vc_mode == KD_TEXT) {
2563                 fbcon_clear_margins(vc, 0);
2564                 update_screen(vc);
2565         }
2566
2567         if (old_data && (--REFCOUNT(old_data) == 0))
2568                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2569         return 0;
2570 }
2571
2572 static int fbcon_copy_font(struct vc_data *vc, int con)
2573 {
2574         struct display *od = &fb_display[con];
2575         struct console_font *f = &vc->vc_font;
2576
2577         if (od->fontdata == f->data)
2578                 return 0;       /* already the same font... */
2579         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2580 }
2581
2582 /*
2583  *  User asked to set font; we are guaranteed that
2584  *      a) width and height are in range 1..32
2585  *      b) charcount does not exceed 512
2586  *  but lets not assume that, since someone might someday want to use larger
2587  *  fonts. And charcount of 512 is small for unicode support.
2588  *
2589  *  However, user space gives the font in 32 rows , regardless of
2590  *  actual font height. So a new API is needed if support for larger fonts
2591  *  is ever implemented.
2592  */
2593
2594 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2595 {
2596         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2597         unsigned charcount = font->charcount;
2598         int w = font->width;
2599         int h = font->height;
2600         int size;
2601         int i, csum;
2602         u8 *new_data, *data = font->data;
2603         int pitch = (font->width+7) >> 3;
2604
2605         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2606          * If not this check should be changed to charcount < 256 */
2607         if (charcount != 256 && charcount != 512)
2608                 return -EINVAL;
2609
2610         /* Make sure drawing engine can handle the font */
2611         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2612             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2613                 return -EINVAL;
2614
2615         /* Make sure driver can handle the font length */
2616         if (fbcon_invalid_charcount(info, charcount))
2617                 return -EINVAL;
2618
2619         size = h * pitch * charcount;
2620
2621         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2622
2623         if (!new_data)
2624                 return -ENOMEM;
2625
2626         new_data += FONT_EXTRA_WORDS * sizeof(int);
2627         FNTSIZE(new_data) = size;
2628         FNTCHARCNT(new_data) = charcount;
2629         REFCOUNT(new_data) = 0; /* usage counter */
2630         for (i=0; i< charcount; i++) {
2631                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2632         }
2633
2634         /* Since linux has a nice crc32 function use it for counting font
2635          * checksums. */
2636         csum = crc32(0, new_data, size);
2637
2638         FNTSUM(new_data) = csum;
2639         /* Check if the same font is on some other console already */
2640         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2641                 struct vc_data *tmp = vc_cons[i].d;
2642
2643                 if (fb_display[i].userfont &&
2644                     fb_display[i].fontdata &&
2645                     FNTSUM(fb_display[i].fontdata) == csum &&
2646                     FNTSIZE(fb_display[i].fontdata) == size &&
2647                     tmp->vc_font.width == w &&
2648                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2649                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2650                         new_data = (u8 *)fb_display[i].fontdata;
2651                         break;
2652                 }
2653         }
2654         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2655 }
2656
2657 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2658 {
2659         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2660         const struct font_desc *f;
2661
2662         if (!name)
2663                 f = get_default_font(info->var.xres, info->var.yres,
2664                                      info->pixmap.blit_x, info->pixmap.blit_y);
2665         else if (!(f = find_font(name)))
2666                 return -ENOENT;
2667
2668         font->width = f->width;
2669         font->height = f->height;
2670         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2671 }
2672
2673 static u16 palette_red[16];
2674 static u16 palette_green[16];
2675 static u16 palette_blue[16];
2676
2677 static struct fb_cmap palette_cmap = {
2678         0, 16, palette_red, palette_green, palette_blue, NULL
2679 };
2680
2681 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2682 {
2683         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2684         int i, j, k, depth;
2685         u8 val;
2686
2687         if (fbcon_is_inactive(vc, info))
2688                 return -EINVAL;
2689
2690         if (!CON_IS_VISIBLE(vc))
2691                 return 0;
2692
2693         depth = fb_get_color_depth(&info->var, &info->fix);
2694         if (depth > 3) {
2695                 for (i = j = 0; i < 16; i++) {
2696                         k = table[i];
2697                         val = vc->vc_palette[j++];
2698                         palette_red[k] = (val << 8) | val;
2699                         val = vc->vc_palette[j++];
2700                         palette_green[k] = (val << 8) | val;
2701                         val = vc->vc_palette[j++];
2702                         palette_blue[k] = (val << 8) | val;
2703                 }
2704                 palette_cmap.len = 16;
2705                 palette_cmap.start = 0;
2706         /*
2707          * If framebuffer is capable of less than 16 colors,
2708          * use default palette of fbcon.
2709          */
2710         } else
2711                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2712
2713         return fb_set_cmap(&palette_cmap, info);
2714 }
2715
2716 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2717 {
2718         unsigned long p;
2719         int line;
2720
2721         if (vc->vc_num != fg_console || !softback_lines)
2722                 return (u16 *) (vc->vc_origin + offset);
2723         line = offset / vc->vc_size_row;
2724         if (line >= softback_lines)
2725                 return (u16 *) (vc->vc_origin + offset -
2726                                 softback_lines * vc->vc_size_row);
2727         p = softback_curr + offset;
2728         if (p >= softback_end)
2729                 p += softback_buf - softback_end;
2730         return (u16 *) p;
2731 }
2732
2733 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2734                                  int *px, int *py)
2735 {
2736         unsigned long ret;
2737         int x, y;
2738
2739         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2740                 unsigned long offset = (pos - vc->vc_origin) / 2;
2741
2742                 x = offset % vc->vc_cols;
2743                 y = offset / vc->vc_cols;
2744                 if (vc->vc_num == fg_console)
2745                         y += softback_lines;
2746                 ret = pos + (vc->vc_cols - x) * 2;
2747         } else if (vc->vc_num == fg_console && softback_lines) {
2748                 unsigned long offset = pos - softback_curr;
2749
2750                 if (pos < softback_curr)
2751                         offset += softback_end - softback_buf;
2752                 offset /= 2;
2753                 x = offset % vc->vc_cols;
2754                 y = offset / vc->vc_cols;
2755                 ret = pos + (vc->vc_cols - x) * 2;
2756                 if (ret == softback_end)
2757                         ret = softback_buf;
2758                 if (ret == softback_in)
2759                         ret = vc->vc_origin;
2760         } else {
2761                 /* Should not happen */
2762                 x = y = 0;
2763                 ret = vc->vc_origin;
2764         }
2765         if (px)
2766                 *px = x;
2767         if (py)
2768                 *py = y;
2769         return ret;
2770 }
2771
2772 /* As we might be inside of softback, we may work with non-contiguous buffer,
2773    that's why we have to use a separate routine. */
2774 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2775 {
2776         while (cnt--) {
2777                 u16 a = scr_readw(p);
2778                 if (!vc->vc_can_do_color)
2779                         a ^= 0x0800;
2780                 else if (vc->vc_hi_font_mask == 0x100)
2781                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2782                             (((a) & 0x0e00) << 4);
2783                 else
2784                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2785                             (((a) & 0x0700) << 4);
2786                 scr_writew(a, p++);
2787                 if (p == (u16 *) softback_end)
2788                         p = (u16 *) softback_buf;
2789                 if (p == (u16 *) softback_in)
2790                         p = (u16 *) vc->vc_origin;
2791         }
2792 }
2793
2794 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2795 {
2796         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2797         struct fbcon_ops *ops = info->fbcon_par;
2798         struct display *p = &fb_display[fg_console];
2799         int offset, limit, scrollback_old;
2800
2801         if (softback_top) {
2802                 if (vc->vc_num != fg_console)
2803                         return 0;
2804                 if (vc->vc_mode != KD_TEXT || !lines)
2805                         return 0;
2806                 if (logo_shown >= 0) {
2807                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2808
2809                         if (conp2->vc_top == logo_lines
2810                             && conp2->vc_bottom == conp2->vc_rows)
2811                                 conp2->vc_top = 0;
2812                         if (logo_shown == vc->vc_num) {
2813                                 unsigned long p, q;
2814                                 int i;
2815
2816                                 p = softback_in;
2817                                 q = vc->vc_origin +
2818                                     logo_lines * vc->vc_size_row;
2819                                 for (i = 0; i < logo_lines; i++) {
2820                                         if (p == softback_top)
2821                                                 break;
2822                                         if (p == softback_buf)
2823                                                 p = softback_end;
2824                                         p -= vc->vc_size_row;
2825                                         q -= vc->vc_size_row;
2826                                         scr_memcpyw((u16 *) q, (u16 *) p,
2827                                                     vc->vc_size_row);
2828                                 }
2829                                 softback_in = softback_curr = p;
2830                                 update_region(vc, vc->vc_origin,
2831                                               logo_lines * vc->vc_cols);
2832                         }
2833                         logo_shown = FBCON_LOGO_CANSHOW;
2834                 }
2835                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2836                 fbcon_redraw_softback(vc, p, lines);
2837                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2838                 return 0;
2839         }
2840
2841         if (!scrollback_phys_max)
2842                 return -ENOSYS;
2843
2844         scrollback_old = scrollback_current;
2845         scrollback_current -= lines;
2846         if (scrollback_current < 0)
2847                 scrollback_current = 0;
2848         else if (scrollback_current > scrollback_max)
2849                 scrollback_current = scrollback_max;
2850         if (scrollback_current == scrollback_old)
2851                 return 0;
2852
2853         if (fbcon_is_inactive(vc, info))
2854                 return 0;
2855
2856         fbcon_cursor(vc, CM_ERASE);
2857
2858         offset = p->yscroll - scrollback_current;
2859         limit = p->vrows;
2860         switch (p->scrollmode) {
2861         case SCROLL_WRAP_MOVE:
2862                 info->var.vmode |= FB_VMODE_YWRAP;
2863                 break;
2864         case SCROLL_PAN_MOVE:
2865         case SCROLL_PAN_REDRAW:
2866                 limit -= vc->vc_rows;
2867                 info->var.vmode &= ~FB_VMODE_YWRAP;
2868                 break;
2869         }
2870         if (offset < 0)
2871                 offset += limit;
2872         else if (offset >= limit)
2873                 offset -= limit;
2874
2875         ops->var.xoffset = 0;
2876         ops->var.yoffset = offset * vc->vc_font.height;
2877         ops->update_start(info);
2878
2879         if (!scrollback_current)
2880                 fbcon_cursor(vc, CM_DRAW);
2881         return 0;
2882 }
2883
2884 static int fbcon_set_origin(struct vc_data *vc)
2885 {
2886         if (softback_lines)
2887                 fbcon_scrolldelta(vc, softback_lines);
2888         return 0;
2889 }
2890
2891 static void fbcon_suspended(struct fb_info *info)
2892 {
2893         struct vc_data *vc = NULL;
2894         struct fbcon_ops *ops = info->fbcon_par;
2895
2896         if (!ops || ops->currcon < 0)
2897                 return;
2898         vc = vc_cons[ops->currcon].d;
2899
2900         /* Clear cursor, restore saved data */
2901         fbcon_cursor(vc, CM_ERASE);
2902 }
2903
2904 static void fbcon_resumed(struct fb_info *info)
2905 {
2906         struct vc_data *vc;
2907         struct fbcon_ops *ops = info->fbcon_par;
2908
2909         if (!ops || ops->currcon < 0)
2910                 return;
2911         vc = vc_cons[ops->currcon].d;
2912
2913         update_screen(vc);
2914 }
2915
2916 static void fbcon_modechanged(struct fb_info *info)
2917 {
2918         struct fbcon_ops *ops = info->fbcon_par;
2919         struct vc_data *vc;
2920         struct display *p;
2921         int rows, cols;
2922
2923         if (!ops || ops->currcon < 0)
2924                 return;
2925         vc = vc_cons[ops->currcon].d;
2926         if (vc->vc_mode != KD_TEXT ||
2927             registered_fb[con2fb_map[ops->currcon]] != info)
2928                 return;
2929
2930         p = &fb_display[vc->vc_num];
2931         set_blitting_type(vc, info);
2932
2933         if (CON_IS_VISIBLE(vc)) {
2934                 var_to_display(p, &info->var, info);
2935                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2936                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2937                 cols /= vc->vc_font.width;
2938                 rows /= vc->vc_font.height;
2939                 vc_resize(vc, cols, rows);
2940                 updatescrollmode(p, info, vc);
2941                 scrollback_max = 0;
2942                 scrollback_current = 0;
2943
2944                 if (!fbcon_is_inactive(vc, info)) {
2945                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2946                     ops->update_start(info);
2947                 }
2948
2949                 fbcon_set_palette(vc, color_table);
2950                 update_screen(vc);
2951                 if (softback_buf)
2952                         fbcon_update_softback(vc);
2953         }
2954 }
2955
2956 static void fbcon_set_all_vcs(struct fb_info *info)
2957 {
2958         struct fbcon_ops *ops = info->fbcon_par;
2959         struct vc_data *vc;
2960         struct display *p;
2961         int i, rows, cols, fg = -1;
2962
2963         if (!ops || ops->currcon < 0)
2964                 return;
2965
2966         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2967                 vc = vc_cons[i].d;
2968                 if (!vc || vc->vc_mode != KD_TEXT ||
2969                     registered_fb[con2fb_map[i]] != info)
2970                         continue;
2971
2972                 if (CON_IS_VISIBLE(vc)) {
2973                         fg = i;
2974                         continue;
2975                 }
2976
2977                 p = &fb_display[vc->vc_num];
2978                 set_blitting_type(vc, info);
2979                 var_to_display(p, &info->var, info);
2980                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2981                 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2982                 cols /= vc->vc_font.width;
2983                 rows /= vc->vc_font.height;
2984                 vc_resize(vc, cols, rows);
2985         }
2986
2987         if (fg != -1)
2988                 fbcon_modechanged(info);
2989 }
2990
2991 static int fbcon_mode_deleted(struct fb_info *info,
2992                               struct fb_videomode *mode)
2993 {
2994         struct fb_info *fb_info;
2995         struct display *p;
2996         int i, j, found = 0;
2997
2998         /* before deletion, ensure that mode is not in use */
2999         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3000                 j = con2fb_map[i];
3001                 if (j == -1)
3002                         continue;
3003                 fb_info = registered_fb[j];
3004                 if (fb_info != info)
3005                         continue;
3006                 p = &fb_display[i];
3007                 if (!p || !p->mode)
3008                         continue;
3009                 if (fb_mode_is_equal(p->mode, mode)) {
3010                         found = 1;
3011                         break;
3012                 }
3013         }
3014         return found;
3015 }
3016
3017 #ifdef CONFIG_VT_HW_CONSOLE_BINDING
3018 static int fbcon_unbind(void)
3019 {
3020         int ret;
3021
3022         ret = unbind_con_driver(&fb_con, first_fb_vc, last_fb_vc,
3023                                 fbcon_is_default);
3024         return ret;
3025 }
3026 #else
3027 static inline int fbcon_unbind(void)
3028 {
3029         return -EINVAL;
3030 }
3031 #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
3032
3033 static int fbcon_fb_unbind(int idx)
3034 {
3035         int i, new_idx = -1, ret = 0;
3036
3037         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3038                 if (con2fb_map[i] != idx &&
3039                     con2fb_map[i] != -1) {
3040                         new_idx = i;
3041                         break;
3042                 }
3043         }
3044
3045         if (new_idx != -1) {
3046                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3047                         if (con2fb_map[i] == idx)
3048                                 set_con2fb_map(i, new_idx, 0);
3049                 }
3050         } else
3051                 ret = fbcon_unbind();
3052
3053         return ret;
3054 }
3055
3056 static int fbcon_fb_unregistered(struct fb_info *info)
3057 {
3058         int i, idx = info->node;
3059
3060         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3061                 if (con2fb_map[i] == idx)
3062                         con2fb_map[i] = -1;
3063         }
3064
3065         if (idx == info_idx) {
3066                 info_idx = -1;
3067
3068                 for (i = 0; i < FB_MAX; i++) {
3069                         if (registered_fb[i] != NULL) {
3070                                 info_idx = i;
3071                                 break;
3072                         }
3073                 }
3074         }
3075
3076         if (info_idx != -1) {
3077                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3078                         if (con2fb_map[i] == -1)
3079                                 con2fb_map[i] = info_idx;
3080                 }
3081         }
3082
3083         if (!num_registered_fb)
3084                 unregister_con_driver(&fb_con);
3085
3086
3087         if (primary_device == idx)
3088                 primary_device = -1;
3089
3090         return 0;
3091 }
3092
3093 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
3094 static void fbcon_select_primary(struct fb_info *info)
3095 {
3096         if (!map_override && primary_device == -1 &&
3097             fb_is_primary_device(info)) {
3098                 int i;
3099
3100                 printk(KERN_INFO "fbcon: %s (fb%i) is primary device\n",
3101                        info->fix.id, info->node);
3102                 primary_device = info->node;
3103
3104                 for (i = first_fb_vc; i <= last_fb_vc; i++)
3105                         con2fb_map_boot[i] = primary_device;
3106
3107                 if (con_is_bound(&fb_con)) {
3108                         printk(KERN_INFO "fbcon: Remapping primary device, "
3109                                "fb%i, to tty %i-%i\n", info->node,
3110                                first_fb_vc + 1, last_fb_vc + 1);
3111                         info_idx = primary_device;
3112                 }
3113         }
3114
3115 }
3116 #else
3117 static inline void fbcon_select_primary(struct fb_info *info)
3118 {
3119         return;
3120 }
3121 #endif /* CONFIG_FRAMEBUFFER_DETECT_PRIMARY */
3122
3123 static int fbcon_fb_registered(struct fb_info *info)
3124 {
3125         int ret = 0, i, idx = info->node;
3126
3127         fbcon_select_primary(info);
3128
3129         if (info_idx == -1) {
3130                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3131                         if (con2fb_map_boot[i] == idx) {
3132                                 info_idx = idx;
3133                                 break;
3134                         }
3135                 }
3136
3137                 if (info_idx != -1)
3138                         ret = fbcon_takeover(1);
3139         } else {
3140                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3141                         if (con2fb_map_boot[i] == idx)
3142                                 set_con2fb_map(i, idx, 0);
3143                 }
3144         }
3145
3146         return ret;
3147 }
3148
3149 static void fbcon_fb_blanked(struct fb_info *info, int blank)
3150 {
3151         struct fbcon_ops *ops = info->fbcon_par;
3152         struct vc_data *vc;
3153
3154         if (!ops || ops->currcon < 0)
3155                 return;
3156
3157         vc = vc_cons[ops->currcon].d;
3158         if (vc->vc_mode != KD_TEXT ||
3159                         registered_fb[con2fb_map[ops->currcon]] != info)
3160                 return;
3161
3162         if (CON_IS_VISIBLE(vc)) {
3163                 if (blank)
3164                         do_blank_screen(0);
3165                 else
3166                         do_unblank_screen(0);
3167         }
3168         ops->blank_state = blank;
3169 }
3170
3171 static void fbcon_new_modelist(struct fb_info *info)
3172 {
3173         int i;
3174         struct vc_data *vc;
3175         struct fb_var_screeninfo var;
3176         const struct fb_videomode *mode;
3177
3178         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3179                 if (registered_fb[con2fb_map[i]] != info)
3180                         continue;
3181                 if (!fb_display[i].mode)
3182                         continue;
3183                 vc = vc_cons[i].d;
3184                 display_to_var(&var, &fb_display[i]);
3185                 mode = fb_find_nearest_mode(fb_display[i].mode,
3186                                             &info->modelist);
3187                 fb_videomode_to_var(&var, mode);
3188                 fbcon_set_disp(info, &var, vc->vc_num);
3189         }
3190 }
3191
3192 static void fbcon_get_requirement(struct fb_info *info,
3193                                   struct fb_blit_caps *caps)
3194 {
3195         struct vc_data *vc;
3196         struct display *p;
3197
3198         if (caps->flags) {
3199                 int i, charcnt;
3200
3201                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
3202                         vc = vc_cons[i].d;
3203                         if (vc && vc->vc_mode == KD_TEXT &&
3204                             info->node == con2fb_map[i]) {
3205                                 p = &fb_display[i];
3206                                 caps->x |= 1 << (vc->vc_font.width - 1);
3207                                 caps->y |= 1 << (vc->vc_font.height - 1);
3208                                 charcnt = (p->userfont) ?
3209                                         FNTCHARCNT(p->fontdata) : 256;
3210                                 if (caps->len < charcnt)
3211                                         caps->len = charcnt;
3212                         }
3213                 }
3214         } else {
3215                 vc = vc_cons[fg_console].d;
3216
3217                 if (vc && vc->vc_mode == KD_TEXT &&
3218                     info->node == con2fb_map[fg_console]) {
3219                         p = &fb_display[fg_console];
3220                         caps->x = 1 << (vc->vc_font.width - 1);
3221                         caps->y = 1 << (vc->vc_font.height - 1);
3222                         caps->len = (p->userfont) ?
3223                                 FNTCHARCNT(p->fontdata) : 256;
3224                 }
3225         }
3226 }
3227
3228 static int fbcon_event_notify(struct notifier_block *self,
3229                               unsigned long action, void *data)
3230 {
3231         struct fb_event *event = data;
3232         struct fb_info *info = event->info;
3233         struct fb_videomode *mode;
3234         struct fb_con2fbmap *con2fb;
3235         struct fb_blit_caps *caps;
3236         int ret = 0;
3237
3238         /*
3239          * ignore all events except driver registration and deregistration
3240          * if fbcon is not active
3241          */
3242         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3243                                   action == FB_EVENT_FB_UNREGISTERED))
3244                 goto done;
3245
3246         switch(action) {
3247         case FB_EVENT_SUSPEND:
3248                 fbcon_suspended(info);
3249                 break;
3250         case FB_EVENT_RESUME:
3251                 fbcon_resumed(info);
3252                 break;
3253         case FB_EVENT_MODE_CHANGE:
3254                 fbcon_modechanged(info);
3255                 break;
3256         case FB_EVENT_MODE_CHANGE_ALL:
3257                 fbcon_set_all_vcs(info);
3258                 break;
3259         case FB_EVENT_MODE_DELETE:
3260                 mode = event->data;
3261                 ret = fbcon_mode_deleted(info, mode);
3262                 break;
3263         case FB_EVENT_FB_UNBIND:
3264                 ret = fbcon_fb_unbind(info->node);
3265                 break;
3266         case FB_EVENT_FB_REGISTERED:
3267                 ret = fbcon_fb_registered(info);
3268                 break;
3269         case FB_EVENT_FB_UNREGISTERED:
3270                 ret = fbcon_fb_unregistered(info);
3271                 break;
3272         case FB_EVENT_SET_CONSOLE_MAP:
3273                 con2fb = event->data;
3274                 ret = set_con2fb_map(con2fb->console - 1,
3275                                      con2fb->framebuffer, 1);
3276                 break;
3277         case FB_EVENT_GET_CONSOLE_MAP:
3278                 con2fb = event->data;
3279                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3280                 break;
3281         case FB_EVENT_BLANK:
3282                 fbcon_fb_blanked(info, *(int *)event->data);
3283                 break;
3284         case FB_EVENT_NEW_MODELIST:
3285                 fbcon_new_modelist(info);
3286                 break;
3287         case FB_EVENT_GET_REQ:
3288                 caps = event->data;
3289                 fbcon_get_requirement(info, caps);
3290                 break;
3291         }
3292
3293 done:
3294         return ret;
3295 }
3296
3297 /*
3298  *  The console `switch' structure for the frame buffer based console
3299  */
3300
3301 static const struct consw fb_con = {
3302         .owner                  = THIS_MODULE,
3303         .con_startup            = fbcon_startup,
3304         .con_init               = fbcon_init,
3305         .con_deinit             = fbcon_deinit,
3306         .con_clear              = fbcon_clear,
3307         .con_putc               = fbcon_putc,
3308         .con_putcs              = fbcon_putcs,
3309         .con_cursor             = fbcon_cursor,
3310         .con_scroll             = fbcon_scroll,
3311         .con_bmove              = fbcon_bmove,
3312         .con_switch             = fbcon_switch,
3313         .con_blank              = fbcon_blank,
3314         .con_font_set           = fbcon_set_font,
3315         .con_font_get           = fbcon_get_font,
3316         .con_font_default       = fbcon_set_def_font,
3317         .con_font_copy          = fbcon_copy_font,
3318         .con_set_palette        = fbcon_set_palette,
3319         .con_scrolldelta        = fbcon_scrolldelta,
3320         .con_set_origin         = fbcon_set_origin,
3321         .con_invert_region      = fbcon_invert_region,
3322         .con_screen_pos         = fbcon_screen_pos,
3323         .con_getxy              = fbcon_getxy,
3324         .con_resize             = fbcon_resize,
3325 };
3326
3327 static struct notifier_block fbcon_event_notifier = {
3328         .notifier_call  = fbcon_event_notify,
3329 };
3330
3331 static ssize_t store_rotate(struct device *device,
3332                             struct device_attribute *attr, const char *buf,
3333                             size_t count)
3334 {
3335         struct fb_info *info;
3336         int rotate, idx;
3337         char **last = NULL;
3338
3339         if (fbcon_has_exited)
3340                 return count;
3341
3342         acquire_console_sem();
3343         idx = con2fb_map[fg_console];
3344
3345         if (idx == -1 || registered_fb[idx] == NULL)
3346                 goto err;
3347
3348         info = registered_fb[idx];
3349         rotate = simple_strtoul(buf, last, 0);
3350         fbcon_rotate(info, rotate);
3351 err:
3352         release_console_sem();
3353         return count;
3354 }
3355
3356 static ssize_t store_rotate_all(struct device *device,
3357                                 struct device_attribute *attr,const char *buf,
3358                                 size_t count)
3359 {
3360         struct fb_info *info;
3361         int rotate, idx;
3362         char **last = NULL;
3363
3364         if (fbcon_has_exited)
3365                 return count;
3366
3367         acquire_console_sem();
3368         idx = con2fb_map[fg_console];
3369
3370         if (idx == -1 || registered_fb[idx] == NULL)
3371                 goto err;
3372
3373         info = registered_fb[idx];
3374         rotate = simple_strtoul(buf, last, 0);
3375         fbcon_rotate_all(info, rotate);
3376 err:
3377         release_console_sem();
3378         return count;
3379 }
3380
3381 static ssize_t show_rotate(struct device *device,
3382                            struct device_attribute *attr,char *buf)
3383 {
3384         struct fb_info *info;
3385         int rotate = 0, idx;
3386
3387         if (fbcon_has_exited)
3388                 return 0;
3389
3390         acquire_console_sem();
3391         idx = con2fb_map[fg_console];
3392
3393         if (idx == -1 || registered_fb[idx] == NULL)
3394                 goto err;
3395
3396         info = registered_fb[idx];
3397         rotate = fbcon_get_rotate(info);
3398 err:
3399         release_console_sem();
3400         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3401 }
3402
3403 static ssize_t show_cursor_blink(struct device *device,
3404                                  struct device_attribute *attr, char *buf)
3405 {
3406         struct fb_info *info;
3407         struct fbcon_ops *ops;
3408         int idx, blink = -1;
3409
3410         if (fbcon_has_exited)
3411                 return 0;
3412
3413         acquire_console_sem();
3414         idx = con2fb_map[fg_console];
3415
3416         if (idx == -1 || registered_fb[idx] == NULL)
3417                 goto err;
3418
3419         info = registered_fb[idx];
3420         ops = info->fbcon_par;
3421
3422         if (!ops)
3423                 goto err;
3424
3425         blink = (ops->flags & FBCON_FLAGS_CURSOR_TIMER) ? 1 : 0;
3426 err:
3427         release_console_sem();
3428         return snprintf(buf, PAGE_SIZE, "%d\n", blink);
3429 }
3430
3431 static ssize_t store_cursor_blink(struct device *device,
3432                                   struct device_attribute *attr,
3433                                   const char *buf, size_t count)
3434 {
3435         struct fb_info *info;
3436         int blink, idx;
3437         char **last = NULL;
3438
3439         if (fbcon_has_exited)
3440                 return count;
3441
3442         acquire_console_sem();
3443         idx = con2fb_map[fg_console];
3444
3445         if (idx == -1 || registered_fb[idx] == NULL)
3446                 goto err;
3447
3448         info = registered_fb[idx];
3449
3450         if (!info->fbcon_par)
3451                 goto err;
3452
3453         blink = simple_strtoul(buf, last, 0);
3454
3455         if (blink) {
3456                 fbcon_cursor_noblink = 0;
3457                 fbcon_add_cursor_timer(info);
3458         } else {
3459                 fbcon_cursor_noblink = 1;
3460                 fbcon_del_cursor_timer(info);
3461         }
3462
3463 err:
3464         release_console_sem();
3465         return count;
3466 }
3467
3468 static struct device_attribute device_attrs[] = {
3469         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3470         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3471         __ATTR(cursor_blink, S_IRUGO|S_IWUSR, show_cursor_blink,
3472                store_cursor_blink),
3473 };
3474
3475 static int fbcon_init_device(void)
3476 {
3477         int i, error = 0;
3478
3479         fbcon_has_sysfs = 1;
3480
3481         for (i = 0; i < ARRAY_SIZE(device_attrs); i++) {
3482                 error = device_create_file(fbcon_device, &device_attrs[i]);
3483
3484                 if (error)
3485                         break;
3486         }
3487
3488         if (error) {
3489                 while (--i >= 0)
3490                         device_remove_file(fbcon_device, &device_attrs[i]);
3491
3492                 fbcon_has_sysfs = 0;
3493         }
3494
3495         return 0;
3496 }
3497
3498 static void fbcon_start(void)
3499 {
3500         if (num_registered_fb) {
3501                 int i;
3502
3503                 acquire_console_sem();
3504
3505                 for (i = 0; i < FB_MAX; i++) {
3506                         if (registered_fb[i] != NULL) {
3507                                 info_idx = i;
3508                                 break;
3509                         }
3510                 }
3511
3512                 release_console_sem();
3513                 fbcon_takeover(0);
3514         }
3515 }
3516
3517 static void fbcon_exit(void)
3518 {
3519         struct fb_info *info;
3520         int i, j, mapped;
3521
3522         if (fbcon_has_exited)
3523                 return;
3524
3525 #ifdef CONFIG_ATARI
3526         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3527 #endif
3528 #ifdef CONFIG_MAC
3529         if (MACH_IS_MAC && vbl_detected)
3530                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3531 #endif
3532
3533         kfree((void *)softback_buf);
3534         softback_buf = 0UL;
3535
3536         for (i = 0; i < FB_MAX; i++) {
3537                 mapped = 0;
3538                 info = registered_fb[i];
3539
3540                 if (info == NULL)
3541                         continue;
3542
3543                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3544                         if (con2fb_map[j] == i)
3545                                 mapped = 1;
3546                 }
3547
3548                 if (mapped) {
3549                         if (info->fbops->fb_release)
3550                                 info->fbops->fb_release(info, 0);
3551                         module_put(info->fbops->owner);
3552
3553                         if (info->fbcon_par) {
3554                                 struct fbcon_ops *ops = info->fbcon_par;
3555
3556                                 fbcon_del_cursor_timer(info);
3557                                 kfree(ops->cursor_src);
3558                                 kfree(info->fbcon_par);
3559                                 info->fbcon_par = NULL;
3560                         }
3561
3562                         if (info->queue.func == fb_flashcursor)
3563                                 info->queue.func = NULL;
3564                 }
3565         }
3566
3567         fbcon_has_exited = 1;
3568 }
3569
3570 static int __init fb_console_init(void)
3571 {
3572         int i;
3573
3574         acquire_console_sem();
3575         fb_register_client(&fbcon_event_notifier);
3576         fbcon_device = device_create(fb_class, NULL, MKDEV(0, 0), "fbcon");
3577
3578         if (IS_ERR(fbcon_device)) {
3579                 printk(KERN_WARNING "Unable to create device "
3580                        "for fbcon; errno = %ld\n",
3581                        PTR_ERR(fbcon_device));
3582                 fbcon_device = NULL;
3583         } else
3584                 fbcon_init_device();
3585
3586         for (i = 0; i < MAX_NR_CONSOLES; i++)
3587                 con2fb_map[i] = -1;
3588
3589         release_console_sem();
3590         fbcon_start();
3591         return 0;
3592 }
3593
3594 module_init(fb_console_init);
3595
3596 #ifdef MODULE
3597
3598 static void __exit fbcon_deinit_device(void)
3599 {
3600         int i;
3601
3602         if (fbcon_has_sysfs) {
3603                 for (i = 0; i < ARRAY_SIZE(device_attrs); i++)
3604                         device_remove_file(fbcon_device, &device_attrs[i]);
3605
3606                 fbcon_has_sysfs = 0;
3607         }
3608 }
3609
3610 static void __exit fb_console_exit(void)
3611 {
3612         acquire_console_sem();
3613         fb_unregister_client(&fbcon_event_notifier);
3614         fbcon_deinit_device();
3615         device_destroy(fb_class, MKDEV(0, 0));
3616         fbcon_exit();
3617         release_console_sem();
3618         unregister_con_driver(&fb_con);
3619 }
3620
3621 module_exit(fb_console_exit);
3622
3623 #endif
3624
3625 MODULE_LICENSE("GPL");