drivers/video/console/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/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/irq.h>
  79 #include <asm/system.h>
  80 #include <asm/uaccess.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
 129 /* font data */
 130 static char fontname[40];
 131
 132 /* current fb_info */
 133 static int info_idx = -1;
 134
 135 /* console rotation */
 136 static int rotate;
 137 static int fbcon_has_sysfs;
 138
 139 static const struct consw fb_con;
 140
 141 #define CM_SOFTBACK     (8)
 142
 143 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 144
 145 static int fbcon_set_origin(struct vc_data *);
 146
 147 #define CURSOR_DRAW_DELAY               (1)
 148
 149 /* # VBL ints between cursor state changes */
 150 #define ATARI_CURSOR_BLINK_RATE         (42)
 151 #define MAC_CURSOR_BLINK_RATE           (32)
 152 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 153
 154 static int vbl_cursor_cnt;
 155
 156 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 157
 158 /*
 159  *  Interface used by the world
 160  */
 161
 162 static const char *fbcon_startup(void);
 163 static void fbcon_init(struct vc_data *vc, int init);
 164 static void fbcon_deinit(struct vc_data *vc);
 165 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 166                         int width);
 167 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 168 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 169                         int count, int ypos, int xpos);
 170 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 171 static void fbcon_cursor(struct vc_data *vc, int mode);
 172 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 173                         int count);
 174 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 175                         int height, int width);
 176 static int fbcon_switch(struct vc_data *vc);
 177 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 178 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 179 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 180
 181 /*
 182  *  Internal routines
 183  */
 184 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 185 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 186 static __inline__ void ypan_up(struct vc_data *vc, int count);
 187 static __inline__ void ypan_down(struct vc_data *vc, int count);
 188 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 189                             int dy, int dx, int height, int width, u_int y_break);
 190 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 191                            struct vc_data *vc);
 192 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 193                               int unit);
 194 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 195                               int line, int count, int dy);
 196 static void fbcon_modechanged(struct fb_info *info);
 197 static void fbcon_set_all_vcs(struct fb_info *info);
 198 static void fbcon_start(void);
 199 static void fbcon_exit(void);
 200 static struct class_device *fbcon_class_device;
 201
 202 #ifdef CONFIG_MAC
 203 /*
 204  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 205  */
 206 static int vbl_detected;
 207
 208 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 209 {
 210         vbl_detected++;
 211         return IRQ_HANDLED;
 212 }
 213 #endif
 214
 215 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 216 static inline void fbcon_set_rotation(struct fb_info *info)
 217 {
 218         struct fbcon_ops *ops = info->fbcon_par;
 219
 220         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 221             ops->p->con_rotate < 4)
 222                 ops->rotate = ops->p->con_rotate;
 223         else
 224                 ops->rotate = 0;
 225 }
 226
 227 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 228 {
 229         struct fbcon_ops *ops= info->fbcon_par;
 230         struct fb_info *fb_info;
 231
 232         if (!ops || ops->currcon == -1)
 233                 return;
 234
 235         fb_info = registered_fb[con2fb_map[ops->currcon]];
 236
 237         if (info == fb_info) {
 238                 struct display *p = &fb_display[ops->currcon];
 239
 240                 if (rotate < 4)
 241                         p->con_rotate = rotate;
 242                 else
 243                         p->con_rotate = 0;
 244
 245                 fbcon_modechanged(info);
 246         }
 247 }
 248
 249 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 250 {
 251         struct fbcon_ops *ops = info->fbcon_par;
 252         struct vc_data *vc;
 253         struct display *p;
 254         int i;
 255
 256         if (!ops || ops->currcon < 0 || rotate > 3)
 257                 return;
 258
 259         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 260                 vc = vc_cons[i].d;
 261                 if (!vc || vc->vc_mode != KD_TEXT ||
 262                     registered_fb[con2fb_map[i]] != info)
 263                         continue;
 264
 265                 p = &fb_display[vc->vc_num];
 266                 p->con_rotate = rotate;
 267         }
 268
 269         fbcon_set_all_vcs(info);
 270 }
 271 #else
 272 static inline void fbcon_set_rotation(struct fb_info *info)
 273 {
 274         struct fbcon_ops *ops = info->fbcon_par;
 275
 276         ops->rotate = FB_ROTATE_UR;
 277 }
 278
 279 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 280 {
 281         return;
 282 }
 283
 284 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 285 {
 286         return;
 287 }
 288 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 289
 290 static int fbcon_get_rotate(struct fb_info *info)
 291 {
 292         struct fbcon_ops *ops = info->fbcon_par;
 293
 294         return (ops) ? ops->rotate : 0;
 295 }
 296
 297 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 298 {
 299         struct fbcon_ops *ops = info->fbcon_par;
 300
 301         return (info->state != FBINFO_STATE_RUNNING ||
 302                 vc->vc_mode != KD_TEXT || ops->graphics);
 303 }
 304
 305 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 306               u16 c, int is_fg)
 307 {
 308         int depth = fb_get_color_depth(&info->var, &info->fix);
 309         int color = 0;
 310
 311         if (console_blanked) {
 312                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 313
 314                 c = vc->vc_video_erase_char & charmask;
 315         }
 316
 317         if (depth != 1)
 318                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 319                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 320
 321         switch (depth) {
 322         case 1:
 323         {
 324                 int col = ~(0xfff << (max(info->var.green.length,
 325                                           max(info->var.red.length,
 326                                               info->var.blue.length)))) & 0xff;
 327
 328                 /* 0 or 1 */
 329                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 330                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 331
 332                 if (console_blanked)
 333                         fg = bg;
 334
 335                 color = (is_fg) ? fg : bg;
 336                 break;
 337         }
 338         case 2:
 339                 /*
 340                  * Scale down 16-colors to 4 colors. Default 4-color palette
 341                  * is grayscale. However, simply dividing the values by 4
 342                  * will not work, as colors 1, 2 and 3 will be scaled-down
 343                  * to zero rendering them invisible.  So empirically convert
 344                  * colors to a sane 4-level grayscale.
 345                  */
 346                 switch (color) {
 347                 case 0:
 348                         color = 0; /* black */
 349                         break;
 350                 case 1 ... 6:
 351                         color = 2; /* white */
 352                         break;
 353                 case 7 ... 8:
 354                         color = 1; /* gray */
 355                         break;
 356                 default:
 357                         color = 3; /* intense white */
 358                         break;
 359                 }
 360                 break;
 361         case 3:
 362                 /*
 363                  * Last 8 entries of default 16-color palette is a more intense
 364                  * version of the first 8 (i.e., same chrominance, different
 365                  * luminance).
 366                  */
 367                 color &= 7;
 368                 break;
 369         }
 370
 371
 372         return color;
 373 }
 374
 375 static void fbcon_update_softback(struct vc_data *vc)
 376 {
 377         int l = fbcon_softback_size / vc->vc_size_row;
 378
 379         if (l > 5)
 380                 softback_end = softback_buf + l * vc->vc_size_row;
 381         else
 382                 /* Smaller scrollback makes no sense, and 0 would screw
 383                    the operation totally */
 384                 softback_top = 0;
 385 }
 386
 387 static void fb_flashcursor(struct work_struct *work)
 388 {
 389         struct fb_info *info = container_of(work, struct fb_info, queue);
 390         struct fbcon_ops *ops = info->fbcon_par;
 391         struct display *p;
 392         struct vc_data *vc = NULL;
 393         int c;
 394         int mode;
 395
 396         acquire_console_sem();
 397         if (ops && ops->currcon != -1)
 398                 vc = vc_cons[ops->currcon].d;
 399
 400         if (!vc || !CON_IS_VISIBLE(vc) ||
 401             registered_fb[con2fb_map[vc->vc_num]] != info ||
 402             vc->vc_deccm != 1) {
 403                 release_console_sem();
 404                 return;
 405         }
 406
 407         p = &fb_display[vc->vc_num];
 408         c = scr_readw((u16 *) vc->vc_pos);
 409         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 410                 CM_ERASE : CM_DRAW;
 411         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 412                     get_color(vc, info, c, 0));
 413         release_console_sem();
 414 }
 415
 416 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 417 static int cursor_blink_rate;
 418 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 419 {
 420         struct fb_info *info = dev_id;
 421
 422         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 423                 schedule_work(&info->queue);
 424                 vbl_cursor_cnt = cursor_blink_rate;
 425         }
 426         return IRQ_HANDLED;
 427 }
 428 #endif
 429
 430 static void cursor_timer_handler(unsigned long dev_addr)
 431 {
 432         struct fb_info *info = (struct fb_info *) dev_addr;
 433         struct fbcon_ops *ops = info->fbcon_par;
 434
 435         schedule_work(&info->queue);
 436         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 437 }
 438
 439 static void fbcon_add_cursor_timer(struct fb_info *info)
 440 {
 441         struct fbcon_ops *ops = info->fbcon_par;
 442
 443         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 444             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
 445                 if (!info->queue.func)
 446                         INIT_WORK(&info->queue, fb_flashcursor);
 447
 448                 init_timer(&ops->cursor_timer);
 449                 ops->cursor_timer.function = cursor_timer_handler;
 450                 ops->cursor_timer.expires = jiffies + HZ / 5;
 451                 ops->cursor_timer.data = (unsigned long ) info;
 452                 add_timer(&ops->cursor_timer);
 453                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 454         }
 455 }
 456
 457 static void fbcon_del_cursor_timer(struct fb_info *info)
 458 {
 459         struct fbcon_ops *ops = info->fbcon_par;
 460
 461         if (info->queue.func == fb_flashcursor &&
 462             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 463                 del_timer_sync(&ops->cursor_timer);
 464                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 465         }
 466 }
 467
 468 #ifndef MODULE
 469 static int __init fb_console_setup(char *this_opt)
 470 {
 471         char *options;
 472         int i, j;
 473
 474         if (!this_opt || !*this_opt)
 475                 return 1;
 476
 477         while ((options = strsep(&this_opt, ",")) != NULL) {
 478                 if (!strncmp(options, "font:", 5))
 479                         strcpy(fontname, options + 5);
 480
 481                 if (!strncmp(options, "scrollback:", 11)) {
 482                         options += 11;
 483                         if (*options) {
 484                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 485                                 if (*options == 'k' || *options == 'K') {
 486                                         fbcon_softback_size *= 1024;
 487                                         options++;
 488                                 }
 489                                 if (*options != ',')
 490                                         return 1;
 491                                 options++;
 492                         } else
 493                                 return 1;
 494                 }
 495
 496                 if (!strncmp(options, "map:", 4)) {
 497                         options += 4;
 498                         if (*options)
 499                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 500                                         if (!options[j])
 501                                                 j = 0;
 502                                         con2fb_map_boot[i] =
 503                                                 (options[j++]-'0') % FB_MAX;
 504                                 }
 505                         return 1;
 506                 }
 507
 508                 if (!strncmp(options, "vc:", 3)) {
 509                         options += 3;
 510                         if (*options)
 511                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 512                         if (first_fb_vc < 0)
 513                                 first_fb_vc = 0;
 514                         if (*options++ == '-')
 515                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 516                         fbcon_is_default = 0;
 517                 }
 518
 519                 if (!strncmp(options, "rotate:", 7)) {
 520                         options += 7;
 521                         if (*options)
 522                                 rotate = simple_strtoul(options, &options, 0);
 523                         if (rotate > 3)
 524                                 rotate = 0;
 525                 }
 526         }
 527         return 1;
 528 }
 529
 530 __setup("fbcon=", fb_console_setup);
 531 #endif
 532
 533 static int search_fb_in_map(int idx)
 534 {
 535         int i, retval = 0;
 536
 537         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 538                 if (con2fb_map[i] == idx)
 539                         retval = 1;
 540         }
 541         return retval;
 542 }
 543
 544 static int search_for_mapped_con(void)
 545 {
 546         int i, retval = 0;
 547
 548         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 549                 if (con2fb_map[i] != -1)
 550                         retval = 1;
 551         }
 552         return retval;
 553 }
 554
 555 static int fbcon_takeover(int show_logo)
 556 {
 557         int err, i;
 558
 559         if (!num_registered_fb)
 560                 return -ENODEV;
 561
 562         if (!show_logo)
 563                 logo_shown = FBCON_LOGO_DONTSHOW;
 564
 565         for (i = first_fb_vc; i <= last_fb_vc; i++)
 566                 con2fb_map[i] = info_idx;
 567
 568         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 569                                 fbcon_is_default);
 570
 571         if (err) {
 572                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 573                         con2fb_map[i] = -1;
 574                 }
 575                 info_idx = -1;
 576         }
 577
 578         return err;
 579 }
 580
 581 #ifdef MODULE
 582 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 583                                int cols, int rows, int new_cols, int new_rows)
 584 {
 585         logo_shown = FBCON_LOGO_DONTSHOW;
 586 }
 587 #else
 588 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 589                                int cols, int rows, int new_cols, int new_rows)
 590 {
 591         /* Need to make room for the logo */
 592         struct fbcon_ops *ops = info->fbcon_par;
 593         int cnt, erase = vc->vc_video_erase_char, step;
 594         unsigned short *save = NULL, *r, *q;
 595
 596         if (info->flags & FBINFO_MODULE) {
 597                 logo_shown = FBCON_LOGO_DONTSHOW;
 598                 return;
 599         }
 600
 601         /*
 602          * remove underline attribute from erase character
 603          * if black and white framebuffer.
 604          */
 605         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 606                 erase &= ~0x400;
 607         logo_height = fb_prepare_logo(info, ops->rotate);
 608         logo_lines = (logo_height + vc->vc_font.height - 1) /
 609                 vc->vc_font.height;
 610         q = (unsigned short *) (vc->vc_origin +
 611                                 vc->vc_size_row * rows);
 612         step = logo_lines * cols;
 613         for (r = q - logo_lines * cols; r < q; r++)
 614                 if (scr_readw(r) != vc->vc_video_erase_char)
 615                         break;
 616         if (r != q && new_rows >= rows + logo_lines) {
 617                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 618                 if (save) {
 619                         int i = cols < new_cols ? cols : new_cols;
 620                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 621                         r = q - step;
 622                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 623                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 624                         r = q;
 625                 }
 626         }
 627         if (r == q) {
 628                 /* We can scroll screen down */
 629                 r = q - step - cols;
 630                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 631                         scr_memcpyw(r + step, r, vc->vc_size_row);
 632                         r -= cols;
 633                 }
 634                 if (!save) {
 635                         int lines;
 636                         if (vc->vc_y + logo_lines >= rows)
 637                                 lines = rows - vc->vc_y - 1;
 638                         else
 639                                 lines = logo_lines;
 640                         vc->vc_y += lines;
 641                         vc->vc_pos += lines * vc->vc_size_row;
 642                 }
 643         }
 644         scr_memsetw((unsigned short *) vc->vc_origin,
 645                     erase,
 646                     vc->vc_size_row * logo_lines);
 647
 648         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 649                 fbcon_clear_margins(vc, 0);
 650                 update_screen(vc);
 651         }
 652
 653         if (save) {
 654                 q = (unsigned short *) (vc->vc_origin +
 655                                         vc->vc_size_row *
 656                                         rows);
 657                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 658                 vc->vc_y += logo_lines;
 659                 vc->vc_pos += logo_lines * vc->vc_size_row;
 660                 kfree(save);
 661         }
 662
 663         if (logo_lines > vc->vc_bottom) {
 664                 logo_shown = FBCON_LOGO_CANSHOW;
 665                 printk(KERN_INFO
 666                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 667         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 668                 logo_shown = FBCON_LOGO_DRAW;
 669                 vc->vc_top = logo_lines;
 670         }
 671 }
 672 #endif /* MODULE */
 673
 674 #ifdef CONFIG_FB_TILEBLITTING
 675 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 676 {
 677         struct fbcon_ops *ops = info->fbcon_par;
 678
 679         ops->p = &fb_display[vc->vc_num];
 680
 681         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 682                 fbcon_set_tileops(vc, info);
 683         else {
 684                 fbcon_set_rotation(info);
 685                 fbcon_set_bitops(ops);
 686         }
 687 }
 688 #else
 689 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 690 {
 691         struct fbcon_ops *ops = info->fbcon_par;
 692
 693         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 694         ops->p = &fb_display[vc->vc_num];
 695         fbcon_set_rotation(info);
 696         fbcon_set_bitops(ops);
 697 }
 698 #endif /* CONFIG_MISC_TILEBLITTING */
 699
 700
 701 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 702                                   int unit, int oldidx)
 703 {
 704         struct fbcon_ops *ops = NULL;
 705         int err = 0;
 706
 707         if (!try_module_get(info->fbops->owner))
 708                 err = -ENODEV;
 709
 710         if (!err && info->fbops->fb_open &&
 711             info->fbops->fb_open(info, 0))
 712                 err = -ENODEV;
 713
 714         if (!err) {
 715                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 716                 if (!ops)
 717                         err = -ENOMEM;
 718         }
 719
 720         if (!err) {
 721                 info->fbcon_par = ops;
 722                 set_blitting_type(vc, info);
 723         }
 724
 725         if (err) {
 726                 con2fb_map[unit] = oldidx;
 727                 module_put(info->fbops->owner);
 728         }
 729
 730         return err;
 731 }
 732
 733 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 734                                   struct fb_info *newinfo, int unit,
 735                                   int oldidx, int found)
 736 {
 737         struct fbcon_ops *ops = oldinfo->fbcon_par;
 738         int err = 0;
 739
 740         if (oldinfo->fbops->fb_release &&
 741             oldinfo->fbops->fb_release(oldinfo, 0)) {
 742                 con2fb_map[unit] = oldidx;
 743                 if (!found && newinfo->fbops->fb_release)
 744                         newinfo->fbops->fb_release(newinfo, 0);
 745                 if (!found)
 746                         module_put(newinfo->fbops->owner);
 747                 err = -ENODEV;
 748         }
 749
 750         if (!err) {
 751                 fbcon_del_cursor_timer(oldinfo);
 752                 kfree(ops->cursor_state.mask);
 753                 kfree(ops->cursor_data);
 754                 kfree(ops->fontbuffer);
 755                 kfree(oldinfo->fbcon_par);
 756                 oldinfo->fbcon_par = NULL;
 757                 module_put(oldinfo->fbops->owner);
 758                 /*
 759                   If oldinfo and newinfo are driving the same hardware,
 760                   the fb_release() method of oldinfo may attempt to
 761                   restore the hardware state.  This will leave the
 762                   newinfo in an undefined state. Thus, a call to
 763                   fb_set_par() may be needed for the newinfo.
 764                 */
 765                 if (newinfo->fbops->fb_set_par)
 766                         newinfo->fbops->fb_set_par(newinfo);
 767         }
 768
 769         return err;
 770 }
 771
 772 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 773                                 int unit, int show_logo)
 774 {
 775         struct fbcon_ops *ops = info->fbcon_par;
 776
 777         ops->currcon = fg_console;
 778
 779         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 780                 info->fbops->fb_set_par(info);
 781
 782         ops->flags |= FBCON_FLAGS_INIT;
 783         ops->graphics = 0;
 784
 785         if (vc)
 786                 fbcon_set_disp(info, &info->var, vc);
 787         else
 788                 fbcon_preset_disp(info, &info->var, unit);
 789
 790         if (show_logo) {
 791                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 792                 struct fb_info *fg_info =
 793                         registered_fb[con2fb_map[fg_console]];
 794
 795                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 796                                    fg_vc->vc_rows, fg_vc->vc_cols,
 797                                    fg_vc->vc_rows);
 798         }
 799
 800         update_screen(vc_cons[fg_console].d);
 801 }
 802
 803 /**
 804  *      set_con2fb_map - map console to frame buffer device
 805  *      @unit: virtual console number to map
 806  *      @newidx: frame buffer index to map virtual console to
 807  *      @user: user request
 808  *
 809  *      Maps a virtual console @unit to a frame buffer device
 810  *      @newidx.
 811  */
 812 static int set_con2fb_map(int unit, int newidx, int user)
 813 {
 814         struct vc_data *vc = vc_cons[unit].d;
 815         int oldidx = con2fb_map[unit];
 816         struct fb_info *info = registered_fb[newidx];
 817         struct fb_info *oldinfo = NULL;
 818         int found, err = 0;
 819
 820         if (oldidx == newidx)
 821                 return 0;
 822
 823         if (!info || fbcon_has_exited)
 824                 return -EINVAL;
 825
 826         if (!err && !search_for_mapped_con()) {
 827                 info_idx = newidx;
 828                 return fbcon_takeover(0);
 829         }
 830
 831         if (oldidx != -1)
 832                 oldinfo = registered_fb[oldidx];
 833
 834         found = search_fb_in_map(newidx);
 835
 836         acquire_console_sem();
 837         con2fb_map[unit] = newidx;
 838         if (!err && !found)
 839                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 840
 841
 842         /*
 843          * If old fb is not mapped to any of the consoles,
 844          * fbcon should release it.
 845          */
 846         if (!err && oldinfo && !search_fb_in_map(oldidx))
 847                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 848                                              found);
 849
 850         if (!err) {
 851                 int show_logo = (fg_console == 0 && !user &&
 852                                  logo_shown != FBCON_LOGO_DONTSHOW);
 853
 854                 if (!found)
 855                         fbcon_add_cursor_timer(info);
 856                 con2fb_map_boot[unit] = newidx;
 857                 con2fb_init_display(vc, info, unit, show_logo);
 858         }
 859
 860         if (!search_fb_in_map(info_idx))
 861                 info_idx = newidx;
 862
 863         release_console_sem();
 864         return err;
 865 }
 866
 867 /*
 868  *  Low Level Operations
 869  */
 870 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 871 static int var_to_display(struct display *disp,
 872                           struct fb_var_screeninfo *var,
 873                           struct fb_info *info)
 874 {
 875         disp->xres_virtual = var->xres_virtual;
 876         disp->yres_virtual = var->yres_virtual;
 877         disp->bits_per_pixel = var->bits_per_pixel;
 878         disp->grayscale = var->grayscale;
 879         disp->nonstd = var->nonstd;
 880         disp->accel_flags = var->accel_flags;
 881         disp->height = var->height;
 882         disp->width = var->width;
 883         disp->red = var->red;
 884         disp->green = var->green;
 885         disp->blue = var->blue;
 886         disp->transp = var->transp;
 887         disp->rotate = var->rotate;
 888         disp->mode = fb_match_mode(var, &info->modelist);
 889         if (disp->mode == NULL)
 890                 /* This should not happen */
 891                 return -EINVAL;
 892         return 0;
 893 }
 894
 895 static void display_to_var(struct fb_var_screeninfo *var,
 896                            struct display *disp)
 897 {
 898         fb_videomode_to_var(var, disp->mode);
 899         var->xres_virtual = disp->xres_virtual;
 900         var->yres_virtual = disp->yres_virtual;
 901         var->bits_per_pixel = disp->bits_per_pixel;
 902         var->grayscale = disp->grayscale;
 903         var->nonstd = disp->nonstd;
 904         var->accel_flags = disp->accel_flags;
 905         var->height = disp->height;
 906         var->width = disp->width;
 907         var->red = disp->red;
 908         var->green = disp->green;
 909         var->blue = disp->blue;
 910         var->transp = disp->transp;
 911         var->rotate = disp->rotate;
 912 }
 913
 914 static const char *fbcon_startup(void)
 915 {
 916         const char *display_desc = "frame buffer device";
 917         struct display *p = &fb_display[fg_console];
 918         struct vc_data *vc = vc_cons[fg_console].d;
 919         const struct font_desc *font = NULL;
 920         struct module *owner;
 921         struct fb_info *info = NULL;
 922         struct fbcon_ops *ops;
 923         int rows, cols;
 924         int irqres;
 925
 926         irqres = 1;
 927         /*
 928          *  If num_registered_fb is zero, this is a call for the dummy part.
 929          *  The frame buffer devices weren't initialized yet.
 930          */
 931         if (!num_registered_fb || info_idx == -1)
 932                 return display_desc;
 933         /*
 934          * Instead of blindly using registered_fb[0], we use info_idx, set by
 935          * fb_console_init();
 936          */
 937         info = registered_fb[info_idx];
 938         if (!info)
 939                 return NULL;
 940
 941         owner = info->fbops->owner;
 942         if (!try_module_get(owner))
 943                 return NULL;
 944         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 945                 module_put(owner);
 946                 return NULL;
 947         }
 948
 949         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 950         if (!ops) {
 951                 module_put(owner);
 952                 return NULL;
 953         }
 954
 955         ops->currcon = -1;
 956         ops->graphics = 1;
 957         ops->cur_rotate = -1;
 958         info->fbcon_par = ops;
 959         p->con_rotate = rotate;
 960         set_blitting_type(vc, info);
 961
 962         if (info->fix.type != FB_TYPE_TEXT) {
 963                 if (fbcon_softback_size) {
 964                         if (!softback_buf) {
 965                                 softback_buf =
 966                                     (unsigned long)
 967                                     kmalloc(fbcon_softback_size,
 968                                             GFP_KERNEL);
 969                                 if (!softback_buf) {
 970                                         fbcon_softback_size = 0;
 971                                         softback_top = 0;
 972                                 }
 973                         }
 974                 } else {
 975                         if (softback_buf) {
 976                                 kfree((void *) softback_buf);
 977                                 softback_buf = 0;
 978                                 softback_top = 0;
 979                         }
 980                 }
 981                 if (softback_buf)
 982                         softback_in = softback_top = softback_curr =
 983                             softback_buf;
 984                 softback_lines = 0;
 985         }
 986
 987         /* Setup default font */
 988         if (!p->fontdata) {
 989                 if (!fontname[0] || !(font = find_font(fontname)))
 990                         font = get_default_font(info->var.xres,
 991                                                 info->var.yres,
 992                                                 info->pixmap.blit_x,
 993                                                 info->pixmap.blit_y);
 994                 vc->vc_font.width = font->width;
 995                 vc->vc_font.height = font->height;
 996                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 997                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 998         }
 999
1000         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1001         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1002         cols /= vc->vc_font.width;
1003         rows /= vc->vc_font.height;
1004         vc_resize(vc, cols, rows);
1005
1006         DPRINTK("mode:   %s\n", info->fix.id);
1007         DPRINTK("visual: %d\n", info->fix.visual);
1008         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
1009                 info->var.yres,
1010                 info->var.bits_per_pixel);
1011
1012 #ifdef CONFIG_ATARI
1013         if (MACH_IS_ATARI) {
1014                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
1015                 irqres =
1016                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1017                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1018                                 info);
1019         }
1020 #endif                          /* CONFIG_ATARI */
1021
1022 #ifdef CONFIG_MAC
1023         /*
1024          * On a Macintoy, the VBL interrupt may or may not be active.
1025          * As interrupt based cursor is more reliable and race free, we
1026          * probe for VBL interrupts.
1027          */
1028         if (MACH_IS_MAC) {
1029                 int ct = 0;
1030                 /*
1031                  * Probe for VBL: set temp. handler ...
1032                  */
1033                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1034                                      "framebuffer vbl", info);
1035                 vbl_detected = 0;
1036
1037                 /*
1038                  * ... and spin for 20 ms ...
1039                  */
1040                 while (!vbl_detected && ++ct < 1000)
1041                         udelay(20);
1042
1043                 if (ct == 1000)
1044                         printk
1045                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1046
1047                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1048
1049                 if (vbl_detected) {
1050                         /*
1051                          * interrupt based cursor ok
1052                          */
1053                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1054                         irqres =
1055                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1056                                         "framebuffer vbl", info);
1057                 } else {
1058                         /*
1059                          * VBL not detected: fall through, use timer based cursor
1060                          */
1061                         irqres = 1;
1062                 }
1063         }
1064 #endif                          /* CONFIG_MAC */
1065
1066         fbcon_add_cursor_timer(info);
1067         fbcon_has_exited = 0;
1068         return display_desc;
1069 }
1070
1071 static void fbcon_init(struct vc_data *vc, int init)
1072 {
1073         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1074         struct fbcon_ops *ops;
1075         struct vc_data **default_mode = vc->vc_display_fg;
1076         struct vc_data *svc = *default_mode;
1077         struct display *t, *p = &fb_display[vc->vc_num];
1078         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1079         int cap;
1080
1081         if (info_idx == -1 || info == NULL)
1082             return;
1083
1084         cap = info->flags;
1085
1086         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1087             (info->fix.type == FB_TYPE_TEXT))
1088                 logo = 0;
1089
1090         if (var_to_display(p, &info->var, info))
1091                 return;
1092
1093         /* If we are not the first console on this
1094            fb, copy the font from that console */
1095         t = &fb_display[fg_console];
1096         if (!p->fontdata) {
1097                 if (t->fontdata) {
1098                         struct vc_data *fvc = vc_cons[fg_console].d;
1099
1100                         vc->vc_font.data = (void *)(p->fontdata =
1101                                                     fvc->vc_font.data);
1102                         vc->vc_font.width = fvc->vc_font.width;
1103                         vc->vc_font.height = fvc->vc_font.height;
1104                         p->userfont = t->userfont;
1105
1106                         if (p->userfont)
1107                                 REFCOUNT(p->fontdata)++;
1108                 } else {
1109                         const struct font_desc *font = NULL;
1110
1111                         if (!fontname[0] || !(font = find_font(fontname)))
1112                                 font = get_default_font(info->var.xres,
1113                                                         info->var.yres,
1114                                                         info->pixmap.blit_x,
1115                                                         info->pixmap.blit_y);
1116                         vc->vc_font.width = font->width;
1117                         vc->vc_font.height = font->height;
1118                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1119                         vc->vc_font.charcount = 256; /* FIXME  Need to
1120                                                         support more fonts */
1121                 }
1122         }
1123
1124         if (p->userfont)
1125                 charcnt = FNTCHARCNT(p->fontdata);
1126
1127         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1128         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1129         if (charcnt == 256) {
1130                 vc->vc_hi_font_mask = 0;
1131         } else {
1132                 vc->vc_hi_font_mask = 0x100;
1133                 if (vc->vc_can_do_color)
1134                         vc->vc_complement_mask <<= 1;
1135         }
1136
1137         if (!*svc->vc_uni_pagedir_loc)
1138                 con_set_default_unimap(svc);
1139         if (!*vc->vc_uni_pagedir_loc)
1140                 con_copy_unimap(vc, svc);
1141
1142         ops = info->fbcon_par;
1143         p->con_rotate = rotate;
1144         set_blitting_type(vc, info);
1145
1146         cols = vc->vc_cols;
1147         rows = vc->vc_rows;
1148         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1149         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1150         new_cols /= vc->vc_font.width;
1151         new_rows /= vc->vc_font.height;
1152         vc_resize(vc, new_cols, new_rows);
1153
1154         /*
1155          * We must always set the mode. The mode of the previous console
1156          * driver could be in the same resolution but we are using different
1157          * hardware so we have to initialize the hardware.
1158          *
1159          * We need to do it in fbcon_init() to prevent screen corruption.
1160          */
1161         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1162                 if (info->fbops->fb_set_par &&
1163                     !(ops->flags & FBCON_FLAGS_INIT))
1164                         info->fbops->fb_set_par(info);
1165                 ops->flags |= FBCON_FLAGS_INIT;
1166         }
1167
1168         ops->graphics = 0;
1169
1170         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1171             !(cap & FBINFO_HWACCEL_DISABLED))
1172                 p->scrollmode = SCROLL_MOVE;
1173         else /* default to something safe */
1174                 p->scrollmode = SCROLL_REDRAW;
1175
1176         /*
1177          *  ++guenther: console.c:vc_allocate() relies on initializing
1178          *  vc_{cols,rows}, but we must not set those if we are only
1179          *  resizing the console.
1180          */
1181         if (!init) {
1182                 vc->vc_cols = new_cols;
1183                 vc->vc_rows = new_rows;
1184         }
1185
1186         if (logo)
1187                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1188
1189         if (vc == svc && softback_buf)
1190                 fbcon_update_softback(vc);
1191
1192         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1193                 ops->rotate = FB_ROTATE_UR;
1194                 set_blitting_type(vc, info);
1195         }
1196
1197         ops->p = &fb_display[fg_console];
1198 }
1199
1200 static void fbcon_free_font(struct display *p)
1201 {
1202         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1203                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1204         p->fontdata = NULL;
1205         p->userfont = 0;
1206 }
1207
1208 static void fbcon_deinit(struct vc_data *vc)
1209 {
1210         struct display *p = &fb_display[vc->vc_num];
1211         struct fb_info *info;
1212         struct fbcon_ops *ops;
1213         int idx;
1214
1215         fbcon_free_font(p);
1216         idx = con2fb_map[vc->vc_num];
1217
1218         if (idx == -1)
1219                 goto finished;
1220
1221         info = registered_fb[idx];
1222
1223         if (!info)
1224                 goto finished;
1225
1226         ops = info->fbcon_par;
1227
1228         if (!ops)
1229                 goto finished;
1230
1231         if (CON_IS_VISIBLE(vc))
1232                 fbcon_del_cursor_timer(info);
1233
1234         ops->flags &= ~FBCON_FLAGS_INIT;
1235 finished:
1236
1237         if (!con_is_bound(&fb_con))
1238                 fbcon_exit();
1239
1240         return;
1241 }
1242
1243 /* ====================================================================== */
1244
1245 /*  fbcon_XXX routines - interface used by the world
1246  *
1247  *  This system is now divided into two levels because of complications
1248  *  caused by hardware scrolling. Top level functions:
1249  *
1250  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1251  *
1252  *  handles y values in range [0, scr_height-1] that correspond to real
1253  *  screen positions. y_wrap shift means that first line of bitmap may be
1254  *  anywhere on this display. These functions convert lineoffsets to
1255  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1256  *
1257  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1258  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1259  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1260  *
1261  *  WARNING:
1262  *
1263  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1264  *  Implies should only really hardware scroll in rows. Only reason for
1265  *  restriction is simplicity & efficiency at the moment.
1266  */
1267
1268 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1269                         int width)
1270 {
1271         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1272         struct fbcon_ops *ops = info->fbcon_par;
1273
1274         struct display *p = &fb_display[vc->vc_num];
1275         u_int y_break;
1276
1277         if (fbcon_is_inactive(vc, info))
1278                 return;
1279
1280         if (!height || !width)
1281                 return;
1282
1283         /* Split blits that cross physical y_wrap boundary */
1284
1285         y_break = p->vrows - p->yscroll;
1286         if (sy < y_break && sy + height - 1 >= y_break) {
1287                 u_int b = y_break - sy;
1288                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1289                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1290                                  width);
1291         } else
1292                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1293 }
1294
1295 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1296                         int count, int ypos, int xpos)
1297 {
1298         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1299         struct display *p = &fb_display[vc->vc_num];
1300         struct fbcon_ops *ops = info->fbcon_par;
1301
1302         if (!fbcon_is_inactive(vc, info))
1303                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1304                            get_color(vc, info, scr_readw(s), 1),
1305                            get_color(vc, info, scr_readw(s), 0));
1306 }
1307
1308 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1309 {
1310         unsigned short chr;
1311
1312         scr_writew(c, &chr);
1313         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1314 }
1315
1316 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1317 {
1318         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1319         struct fbcon_ops *ops = info->fbcon_par;
1320
1321         if (!fbcon_is_inactive(vc, info))
1322                 ops->clear_margins(vc, info, bottom_only);
1323 }
1324
1325 static void fbcon_cursor(struct vc_data *vc, int mode)
1326 {
1327         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1328         struct fbcon_ops *ops = info->fbcon_par;
1329         int y;
1330         int c = scr_readw((u16 *) vc->vc_pos);
1331
1332         if (fbcon_is_inactive(vc, info) || vc->vc_deccm != 1)
1333                 return;
1334
1335         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1336         if (mode & CM_SOFTBACK) {
1337                 mode &= ~CM_SOFTBACK;
1338                 y = softback_lines;
1339         } else {
1340                 if (softback_lines)
1341                         fbcon_set_origin(vc);
1342                 y = 0;
1343         }
1344
1345         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1346                     get_color(vc, info, c, 0));
1347         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1348 }
1349
1350 static int scrollback_phys_max = 0;
1351 static int scrollback_max = 0;
1352 static int scrollback_current = 0;
1353
1354 /*
1355  * If no vc is existent yet, just set struct display
1356  */
1357 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1358                               int unit)
1359 {
1360         struct display *p = &fb_display[unit];
1361         struct display *t = &fb_display[fg_console];
1362
1363         if (var_to_display(p, var, info))
1364                 return;
1365
1366         p->fontdata = t->fontdata;
1367         p->userfont = t->userfont;
1368         if (p->userfont)
1369                 REFCOUNT(p->fontdata)++;
1370 }
1371
1372 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1373                            struct vc_data *vc)
1374 {
1375         struct display *p = &fb_display[vc->vc_num], *t;
1376         struct vc_data **default_mode = vc->vc_display_fg;
1377         struct vc_data *svc = *default_mode;
1378         struct fbcon_ops *ops = info->fbcon_par;
1379         int rows, cols, charcnt = 256;
1380
1381         if (var_to_display(p, var, info))
1382                 return;
1383         t = &fb_display[svc->vc_num];
1384         if (!vc->vc_font.data) {
1385                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1386                 vc->vc_font.width = (*default_mode)->vc_font.width;
1387                 vc->vc_font.height = (*default_mode)->vc_font.height;
1388                 p->userfont = t->userfont;
1389                 if (p->userfont)
1390                         REFCOUNT(p->fontdata)++;
1391         }
1392         if (p->userfont)
1393                 charcnt = FNTCHARCNT(p->fontdata);
1394
1395         var->activate = FB_ACTIVATE_NOW;
1396         info->var.activate = var->activate;
1397         var->yoffset = info->var.yoffset;
1398         var->xoffset = info->var.xoffset;
1399         fb_set_var(info, var);
1400         ops->var = info->var;
1401         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1402         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1403         if (charcnt == 256) {
1404                 vc->vc_hi_font_mask = 0;
1405         } else {
1406                 vc->vc_hi_font_mask = 0x100;
1407                 if (vc->vc_can_do_color)
1408                         vc->vc_complement_mask <<= 1;
1409         }
1410
1411         if (!*svc->vc_uni_pagedir_loc)
1412                 con_set_default_unimap(svc);
1413         if (!*vc->vc_uni_pagedir_loc)
1414                 con_copy_unimap(vc, svc);
1415
1416         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1417         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1418         cols /= vc->vc_font.width;
1419         rows /= vc->vc_font.height;
1420         vc_resize(vc, cols, rows);
1421
1422         if (CON_IS_VISIBLE(vc)) {
1423                 update_screen(vc);
1424                 if (softback_buf)
1425                         fbcon_update_softback(vc);
1426         }
1427 }
1428
1429 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1430 {
1431         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1432         struct fbcon_ops *ops = info->fbcon_par;
1433         struct display *p = &fb_display[vc->vc_num];
1434
1435         p->yscroll += count;
1436         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1437                 p->yscroll -= p->vrows;
1438         ops->var.xoffset = 0;
1439         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1440         ops->var.vmode |= FB_VMODE_YWRAP;
1441         ops->update_start(info);
1442         scrollback_max += count;
1443         if (scrollback_max > scrollback_phys_max)
1444                 scrollback_max = scrollback_phys_max;
1445         scrollback_current = 0;
1446 }
1447
1448 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1449 {
1450         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1451         struct fbcon_ops *ops = info->fbcon_par;
1452         struct display *p = &fb_display[vc->vc_num];
1453
1454         p->yscroll -= count;
1455         if (p->yscroll < 0)     /* Deal with wrap */
1456                 p->yscroll += p->vrows;
1457         ops->var.xoffset = 0;
1458         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1459         ops->var.vmode |= FB_VMODE_YWRAP;
1460         ops->update_start(info);
1461         scrollback_max -= count;
1462         if (scrollback_max < 0)
1463                 scrollback_max = 0;
1464         scrollback_current = 0;
1465 }
1466
1467 static __inline__ void ypan_up(struct vc_data *vc, int count)
1468 {
1469         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1470         struct display *p = &fb_display[vc->vc_num];
1471         struct fbcon_ops *ops = info->fbcon_par;
1472
1473         p->yscroll += count;
1474         if (p->yscroll > p->vrows - vc->vc_rows) {
1475                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1476                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1477                 p->yscroll -= p->vrows - vc->vc_rows;
1478         }
1479
1480         ops->var.xoffset = 0;
1481         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1482         ops->var.vmode &= ~FB_VMODE_YWRAP;
1483         ops->update_start(info);
1484         fbcon_clear_margins(vc, 1);
1485         scrollback_max += count;
1486         if (scrollback_max > scrollback_phys_max)
1487                 scrollback_max = scrollback_phys_max;
1488         scrollback_current = 0;
1489 }
1490
1491 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1492 {
1493         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1494         struct fbcon_ops *ops = info->fbcon_par;
1495         struct display *p = &fb_display[vc->vc_num];
1496
1497         p->yscroll += count;
1498
1499         if (p->yscroll > p->vrows - vc->vc_rows) {
1500                 p->yscroll -= p->vrows - vc->vc_rows;
1501                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1502         }
1503
1504         ops->var.xoffset = 0;
1505         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1506         ops->var.vmode &= ~FB_VMODE_YWRAP;
1507         ops->update_start(info);
1508         fbcon_clear_margins(vc, 1);
1509         scrollback_max += count;
1510         if (scrollback_max > scrollback_phys_max)
1511                 scrollback_max = scrollback_phys_max;
1512         scrollback_current = 0;
1513 }
1514
1515 static __inline__ void ypan_down(struct vc_data *vc, int count)
1516 {
1517         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1518         struct display *p = &fb_display[vc->vc_num];
1519         struct fbcon_ops *ops = info->fbcon_par;
1520
1521         p->yscroll -= count;
1522         if (p->yscroll < 0) {
1523                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1524                             0, vc->vc_rows, vc->vc_cols);
1525                 p->yscroll += p->vrows - vc->vc_rows;
1526         }
1527
1528         ops->var.xoffset = 0;
1529         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1530         ops->var.vmode &= ~FB_VMODE_YWRAP;
1531         ops->update_start(info);
1532         fbcon_clear_margins(vc, 1);
1533         scrollback_max -= count;
1534         if (scrollback_max < 0)
1535                 scrollback_max = 0;
1536         scrollback_current = 0;
1537 }
1538
1539 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1540 {
1541         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1542         struct fbcon_ops *ops = info->fbcon_par;
1543         struct display *p = &fb_display[vc->vc_num];
1544
1545         p->yscroll -= count;
1546
1547         if (p->yscroll < 0) {
1548                 p->yscroll += p->vrows - vc->vc_rows;
1549                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1550         }
1551
1552         ops->var.xoffset = 0;
1553         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1554         ops->var.vmode &= ~FB_VMODE_YWRAP;
1555         ops->update_start(info);
1556         fbcon_clear_margins(vc, 1);
1557         scrollback_max -= count;
1558         if (scrollback_max < 0)
1559                 scrollback_max = 0;
1560         scrollback_current = 0;
1561 }
1562
1563 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1564                                   long delta)
1565 {
1566         int count = vc->vc_rows;
1567         unsigned short *d, *s;
1568         unsigned long n;
1569         int line = 0;
1570
1571         d = (u16 *) softback_curr;
1572         if (d == (u16 *) softback_in)
1573                 d = (u16 *) vc->vc_origin;
1574         n = softback_curr + delta * vc->vc_size_row;
1575         softback_lines -= delta;
1576         if (delta < 0) {
1577                 if (softback_curr < softback_top && n < softback_buf) {
1578                         n += softback_end - softback_buf;
1579                         if (n < softback_top) {
1580                                 softback_lines -=
1581                                     (softback_top - n) / vc->vc_size_row;
1582                                 n = softback_top;
1583                         }
1584                 } else if (softback_curr >= softback_top
1585                            && n < softback_top) {
1586                         softback_lines -=
1587                             (softback_top - n) / vc->vc_size_row;
1588                         n = softback_top;
1589                 }
1590         } else {
1591                 if (softback_curr > softback_in && n >= softback_end) {
1592                         n += softback_buf - softback_end;
1593                         if (n > softback_in) {
1594                                 n = softback_in;
1595                                 softback_lines = 0;
1596                         }
1597                 } else if (softback_curr <= softback_in && n > softback_in) {
1598                         n = softback_in;
1599                         softback_lines = 0;
1600                 }
1601         }
1602         if (n == softback_curr)
1603                 return;
1604         softback_curr = n;
1605         s = (u16 *) softback_curr;
1606         if (s == (u16 *) softback_in)
1607                 s = (u16 *) vc->vc_origin;
1608         while (count--) {
1609                 unsigned short *start;
1610                 unsigned short *le;
1611                 unsigned short c;
1612                 int x = 0;
1613                 unsigned short attr = 1;
1614
1615                 start = s;
1616                 le = advance_row(s, 1);
1617                 do {
1618                         c = scr_readw(s);
1619                         if (attr != (c & 0xff00)) {
1620                                 attr = c & 0xff00;
1621                                 if (s > start) {
1622                                         fbcon_putcs(vc, start, s - start,
1623                                                     line, x);
1624                                         x += s - start;
1625                                         start = s;
1626                                 }
1627                         }
1628                         if (c == scr_readw(d)) {
1629                                 if (s > start) {
1630                                         fbcon_putcs(vc, start, s - start,
1631                                                     line, x);
1632                                         x += s - start + 1;
1633                                         start = s + 1;
1634                                 } else {
1635                                         x++;
1636                                         start++;
1637                                 }
1638                         }
1639                         s++;
1640                         d++;
1641                 } while (s < le);
1642                 if (s > start)
1643                         fbcon_putcs(vc, start, s - start, line, x);
1644                 line++;
1645                 if (d == (u16 *) softback_end)
1646                         d = (u16 *) softback_buf;
1647                 if (d == (u16 *) softback_in)
1648                         d = (u16 *) vc->vc_origin;
1649                 if (s == (u16 *) softback_end)
1650                         s = (u16 *) softback_buf;
1651                 if (s == (u16 *) softback_in)
1652                         s = (u16 *) vc->vc_origin;
1653         }
1654 }
1655
1656 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1657                               int line, int count, int dy)
1658 {
1659         unsigned short *s = (unsigned short *)
1660                 (vc->vc_origin + vc->vc_size_row * line);
1661
1662         while (count--) {
1663                 unsigned short *start = s;
1664                 unsigned short *le = advance_row(s, 1);
1665                 unsigned short c;
1666                 int x = 0;
1667                 unsigned short attr = 1;
1668
1669                 do {
1670                         c = scr_readw(s);
1671                         if (attr != (c & 0xff00)) {
1672                                 attr = c & 0xff00;
1673                                 if (s > start) {
1674                                         fbcon_putcs(vc, start, s - start,
1675                                                     dy, x);
1676                                         x += s - start;
1677                                         start = s;
1678                                 }
1679                         }
1680                         console_conditional_schedule();
1681                         s++;
1682                 } while (s < le);
1683                 if (s > start)
1684                         fbcon_putcs(vc, start, s - start, dy, x);
1685                 console_conditional_schedule();
1686                 dy++;
1687         }
1688 }
1689
1690 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1691                          int line, int count, int offset)
1692 {
1693         unsigned short *d = (unsigned short *)
1694             (vc->vc_origin + vc->vc_size_row * line);
1695         unsigned short *s = d + offset;
1696
1697         while (count--) {
1698                 unsigned short *start = s;
1699                 unsigned short *le = advance_row(s, 1);
1700                 unsigned short c;
1701                 int x = 0;
1702                 unsigned short attr = 1;
1703
1704                 do {
1705                         c = scr_readw(s);
1706                         if (attr != (c & 0xff00)) {
1707                                 attr = c & 0xff00;
1708                                 if (s > start) {
1709                                         fbcon_putcs(vc, start, s - start,
1710                                                     line, x);
1711                                         x += s - start;
1712                                         start = s;
1713                                 }
1714                         }
1715                         if (c == scr_readw(d)) {
1716                                 if (s > start) {
1717                                         fbcon_putcs(vc, start, s - start,
1718                                                      line, x);
1719                                         x += s - start + 1;
1720                                         start = s + 1;
1721                                 } else {
1722                                         x++;
1723                                         start++;
1724                                 }
1725                         }
1726                         scr_writew(c, d);
1727                         console_conditional_schedule();
1728                         s++;
1729                         d++;
1730                 } while (s < le);
1731                 if (s > start)
1732                         fbcon_putcs(vc, start, s - start, line, x);
1733                 console_conditional_schedule();
1734                 if (offset > 0)
1735                         line++;
1736                 else {
1737                         line--;
1738                         /* NOTE: We subtract two lines from these pointers */
1739                         s -= vc->vc_size_row;
1740                         d -= vc->vc_size_row;
1741                 }
1742         }
1743 }
1744
1745 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1746                                        int count)
1747 {
1748         unsigned short *p;
1749
1750         if (vc->vc_num != fg_console)
1751                 return;
1752         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1753
1754         while (count) {
1755                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1756                 count--;
1757                 p = advance_row(p, 1);
1758                 softback_in += vc->vc_size_row;
1759                 if (softback_in == softback_end)
1760                         softback_in = softback_buf;
1761                 if (softback_in == softback_top) {
1762                         softback_top += vc->vc_size_row;
1763                         if (softback_top == softback_end)
1764                                 softback_top = softback_buf;
1765                 }
1766         }
1767         softback_curr = softback_in;
1768 }
1769
1770 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1771                         int count)
1772 {
1773         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1774         struct display *p = &fb_display[vc->vc_num];
1775         struct fbcon_ops *ops = info->fbcon_par;
1776         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1777
1778         if (fbcon_is_inactive(vc, info))
1779                 return -EINVAL;
1780
1781         fbcon_cursor(vc, CM_ERASE);
1782
1783         /*
1784          * ++Geert: Only use ywrap/ypan if the console is in text mode
1785          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1786          *           whole screen (prevents flicker).
1787          */
1788
1789         switch (dir) {
1790         case SM_UP:
1791                 if (count > vc->vc_rows)        /* Maximum realistic size */
1792                         count = vc->vc_rows;
1793                 if (softback_top)
1794                         fbcon_softback_note(vc, t, count);
1795                 if (logo_shown >= 0)
1796                         goto redraw_up;
1797                 switch (p->scrollmode) {
1798                 case SCROLL_MOVE:
1799                         ops->bmove(vc, info, t + count, 0, t, 0,
1800                                     b - t - count, vc->vc_cols);
1801                         ops->clear(vc, info, b - count, 0, count,
1802                                   vc->vc_cols);
1803                         break;
1804
1805                 case SCROLL_WRAP_MOVE:
1806                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1807                                 if (t > 0)
1808                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1809                                                     vc->vc_cols);
1810                                 ywrap_up(vc, count);
1811                                 if (vc->vc_rows - b > 0)
1812                                         fbcon_bmove(vc, b - count, 0, b, 0,
1813                                                     vc->vc_rows - b,
1814                                                     vc->vc_cols);
1815                         } else if (info->flags & FBINFO_READS_FAST)
1816                                 fbcon_bmove(vc, t + count, 0, t, 0,
1817                                             b - t - count, vc->vc_cols);
1818                         else
1819                                 goto redraw_up;
1820                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1821                         break;
1822
1823                 case SCROLL_PAN_REDRAW:
1824                         if ((p->yscroll + count <=
1825                              2 * (p->vrows - vc->vc_rows))
1826                             && ((!scroll_partial && (b - t == vc->vc_rows))
1827                                 || (scroll_partial
1828                                     && (b - t - count >
1829                                         3 * vc->vc_rows >> 2)))) {
1830                                 if (t > 0)
1831                                         fbcon_redraw_move(vc, p, 0, t, count);
1832                                 ypan_up_redraw(vc, t, count);
1833                                 if (vc->vc_rows - b > 0)
1834                                         fbcon_redraw_move(vc, p, b,
1835                                                           vc->vc_rows - b, b);
1836                         } else
1837                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1838                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1839                         break;
1840
1841                 case SCROLL_PAN_MOVE:
1842                         if ((p->yscroll + count <=
1843                              2 * (p->vrows - vc->vc_rows))
1844                             && ((!scroll_partial && (b - t == vc->vc_rows))
1845                                 || (scroll_partial
1846                                     && (b - t - count >
1847                                         3 * vc->vc_rows >> 2)))) {
1848                                 if (t > 0)
1849                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1850                                                     vc->vc_cols);
1851                                 ypan_up(vc, count);
1852                                 if (vc->vc_rows - b > 0)
1853                                         fbcon_bmove(vc, b - count, 0, b, 0,
1854                                                     vc->vc_rows - b,
1855                                                     vc->vc_cols);
1856                         } else if (info->flags & FBINFO_READS_FAST)
1857                                 fbcon_bmove(vc, t + count, 0, t, 0,
1858                                             b - t - count, vc->vc_cols);
1859                         else
1860                                 goto redraw_up;
1861                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1862                         break;
1863
1864                 case SCROLL_REDRAW:
1865                       redraw_up:
1866                         fbcon_redraw(vc, p, t, b - t - count,
1867                                      count * vc->vc_cols);
1868                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1869                         scr_memsetw((unsigned short *) (vc->vc_origin +
1870                                                         vc->vc_size_row *
1871                                                         (b - count)),
1872                                     vc->vc_video_erase_char,
1873                                     vc->vc_size_row * count);
1874                         return 1;
1875                 }
1876                 break;
1877
1878         case SM_DOWN:
1879                 if (count > vc->vc_rows)        /* Maximum realistic size */
1880                         count = vc->vc_rows;
1881                 if (logo_shown >= 0)
1882                         goto redraw_down;
1883                 switch (p->scrollmode) {
1884                 case SCROLL_MOVE:
1885                         ops->bmove(vc, info, t, 0, t + count, 0,
1886                                     b - t - count, vc->vc_cols);
1887                         ops->clear(vc, info, t, 0, count, vc->vc_cols);
1888                         break;
1889
1890                 case SCROLL_WRAP_MOVE:
1891                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1892                                 if (vc->vc_rows - b > 0)
1893                                         fbcon_bmove(vc, b, 0, b - count, 0,
1894                                                     vc->vc_rows - b,
1895                                                     vc->vc_cols);
1896                                 ywrap_down(vc, count);
1897                                 if (t > 0)
1898                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1899                                                     vc->vc_cols);
1900                         } else if (info->flags & FBINFO_READS_FAST)
1901                                 fbcon_bmove(vc, t, 0, t + count, 0,
1902                                             b - t - count, vc->vc_cols);
1903                         else
1904                                 goto redraw_down;
1905                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1906                         break;
1907
1908                 case SCROLL_PAN_MOVE:
1909                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1910                             && ((!scroll_partial && (b - t == vc->vc_rows))
1911                                 || (scroll_partial
1912                                     && (b - t - count >
1913                                         3 * vc->vc_rows >> 2)))) {
1914                                 if (vc->vc_rows - b > 0)
1915                                         fbcon_bmove(vc, b, 0, b - count, 0,
1916                                                     vc->vc_rows - b,
1917                                                     vc->vc_cols);
1918                                 ypan_down(vc, count);
1919                                 if (t > 0)
1920                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1921                                                     vc->vc_cols);
1922                         } else if (info->flags & FBINFO_READS_FAST)
1923                                 fbcon_bmove(vc, t, 0, t + count, 0,
1924                                             b - t - count, vc->vc_cols);
1925                         else
1926                                 goto redraw_down;
1927                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1928                         break;
1929
1930                 case SCROLL_PAN_REDRAW:
1931                         if ((count - p->yscroll <= 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 (vc->vc_rows - b > 0)
1937                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1938                                                           b - count);
1939                                 ypan_down_redraw(vc, t, count);
1940                                 if (t > 0)
1941                                         fbcon_redraw_move(vc, p, count, t, 0);
1942                         } else
1943                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1944                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1945                         break;
1946
1947                 case SCROLL_REDRAW:
1948                       redraw_down:
1949                         fbcon_redraw(vc, p, b - 1, b - t - count,
1950                                      -count * vc->vc_cols);
1951                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1952                         scr_memsetw((unsigned short *) (vc->vc_origin +
1953                                                         vc->vc_size_row *
1954                                                         t),
1955                                     vc->vc_video_erase_char,
1956                                     vc->vc_size_row * count);
1957                         return 1;
1958                 }
1959         }
1960         return 0;
1961 }
1962
1963
1964 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1965                         int height, int width)
1966 {
1967         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1968         struct display *p = &fb_display[vc->vc_num];
1969
1970         if (fbcon_is_inactive(vc, info))
1971                 return;
1972
1973         if (!width || !height)
1974                 return;
1975
1976         /*  Split blits that cross physical y_wrap case.
1977          *  Pathological case involves 4 blits, better to use recursive
1978          *  code rather than unrolled case
1979          *
1980          *  Recursive invocations don't need to erase the cursor over and
1981          *  over again, so we use fbcon_bmove_rec()
1982          */
1983         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1984                         p->vrows - p->yscroll);
1985 }
1986
1987 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1988                             int dy, int dx, int height, int width, u_int y_break)
1989 {
1990         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1991         struct fbcon_ops *ops = info->fbcon_par;
1992         u_int b;
1993
1994         if (sy < y_break && sy + height > y_break) {
1995                 b = y_break - sy;
1996                 if (dy < sy) {  /* Avoid trashing self */
1997                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1998                                         y_break);
1999                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2000                                         height - b, width, y_break);
2001                 } else {
2002                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2003                                         height - b, width, y_break);
2004                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2005                                         y_break);
2006                 }
2007                 return;
2008         }
2009
2010         if (dy < y_break && dy + height > y_break) {
2011                 b = y_break - dy;
2012                 if (dy < sy) {  /* Avoid trashing self */
2013                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2014                                         y_break);
2015                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2016                                         height - b, width, y_break);
2017                 } else {
2018                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2019                                         height - b, width, y_break);
2020                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2021                                         y_break);
2022                 }
2023                 return;
2024         }
2025         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2026                    height, width);
2027 }
2028
2029 static __inline__ void updatescrollmode(struct display *p,
2030                                         struct fb_info *info,
2031                                         struct vc_data *vc)
2032 {
2033         struct fbcon_ops *ops = info->fbcon_par;
2034         int fh = vc->vc_font.height;
2035         int cap = info->flags;
2036         u16 t = 0;
2037         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2038                                   info->fix.xpanstep);
2039         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2040         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2041         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2042                                    info->var.xres_virtual);
2043         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2044                 divides(ypan, vc->vc_font.height) && vyres > yres;
2045         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2046                 divides(ywrap, vc->vc_font.height) &&
2047                 divides(vc->vc_font.height, vyres) &&
2048                 divides(vc->vc_font.height, yres);
2049         int reading_fast = cap & FBINFO_READS_FAST;
2050         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2051                 !(cap & FBINFO_HWACCEL_DISABLED);
2052         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2053                 !(cap & FBINFO_HWACCEL_DISABLED);
2054
2055         p->vrows = vyres/fh;
2056         if (yres > (fh * (vc->vc_rows + 1)))
2057                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2058         if ((yres % fh) && (vyres % fh < yres % fh))
2059                 p->vrows--;
2060
2061         if (good_wrap || good_pan) {
2062                 if (reading_fast || fast_copyarea)
2063                         p->scrollmode = good_wrap ?
2064                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2065                 else
2066                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2067                                 SCROLL_PAN_REDRAW;
2068         } else {
2069                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2070                         p->scrollmode = SCROLL_MOVE;
2071                 else
2072                         p->scrollmode = SCROLL_REDRAW;
2073         }
2074 }
2075
2076 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2077                         unsigned int height)
2078 {
2079         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2080         struct fbcon_ops *ops = info->fbcon_par;
2081         struct display *p = &fb_display[vc->vc_num];
2082         struct fb_var_screeninfo var = info->var;
2083         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2084
2085         virt_w = FBCON_SWAP(ops->rotate, width, height);
2086         virt_h = FBCON_SWAP(ops->rotate, height, width);
2087         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2088                                  vc->vc_font.height);
2089         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2090                                  vc->vc_font.width);
2091         var.xres = virt_w * virt_fw;
2092         var.yres = virt_h * virt_fh;
2093         x_diff = info->var.xres - var.xres;
2094         y_diff = info->var.yres - var.yres;
2095         if (x_diff < 0 || x_diff > virt_fw ||
2096             y_diff < 0 || y_diff > virt_fh) {
2097                 const struct fb_videomode *mode;
2098
2099                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2100                 mode = fb_find_best_mode(&var, &info->modelist);
2101                 if (mode == NULL)
2102                         return -EINVAL;
2103                 display_to_var(&var, p);
2104                 fb_videomode_to_var(&var, mode);
2105
2106                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2107                         return -EINVAL;
2108
2109                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2110                 if (CON_IS_VISIBLE(vc)) {
2111                         var.activate = FB_ACTIVATE_NOW |
2112                                 FB_ACTIVATE_FORCE;
2113                         fb_set_var(info, &var);
2114                 }
2115                 var_to_display(p, &info->var, info);
2116                 ops->var = info->var;
2117         }
2118         updatescrollmode(p, info, vc);
2119         return 0;
2120 }
2121
2122 static int fbcon_switch(struct vc_data *vc)
2123 {
2124         struct fb_info *info, *old_info = NULL;
2125         struct fbcon_ops *ops;
2126         struct display *p = &fb_display[vc->vc_num];
2127         struct fb_var_screeninfo var;
2128         int i, prev_console, charcnt = 256;
2129
2130         info = registered_fb[con2fb_map[vc->vc_num]];
2131         ops = info->fbcon_par;
2132
2133         if (softback_top) {
2134                 if (softback_lines)
2135                         fbcon_set_origin(vc);
2136                 softback_top = softback_curr = softback_in = softback_buf;
2137                 softback_lines = 0;
2138                 fbcon_update_softback(vc);
2139         }
2140
2141         if (logo_shown >= 0) {
2142                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2143
2144                 if (conp2->vc_top == logo_lines
2145                     && conp2->vc_bottom == conp2->vc_rows)
2146                         conp2->vc_top = 0;
2147                 logo_shown = FBCON_LOGO_CANSHOW;
2148         }
2149
2150         prev_console = ops->currcon;
2151         if (prev_console != -1)
2152                 old_info = registered_fb[con2fb_map[prev_console]];
2153         /*
2154          * FIXME: If we have multiple fbdev's loaded, we need to
2155          * update all info->currcon.  Perhaps, we can place this
2156          * in a centralized structure, but this might break some
2157          * drivers.
2158          *
2159          * info->currcon = vc->vc_num;
2160          */
2161         for (i = 0; i < FB_MAX; i++) {
2162                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2163                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2164
2165                         o->currcon = vc->vc_num;
2166                 }
2167         }
2168         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2169         display_to_var(&var, p);
2170         var.activate = FB_ACTIVATE_NOW;
2171
2172         /*
2173          * make sure we don't unnecessarily trip the memcmp()
2174          * in fb_set_var()
2175          */
2176         info->var.activate = var.activate;
2177         var.yoffset = info->var.yoffset;
2178         var.xoffset = info->var.xoffset;
2179         var.vmode = info->var.vmode;
2180         fb_set_var(info, &var);
2181         ops->var = info->var;
2182
2183         if (old_info != NULL && (old_info != info ||
2184                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2185                 if (info->fbops->fb_set_par)
2186                         info->fbops->fb_set_par(info);
2187
2188                 if (old_info != info)
2189                         fbcon_del_cursor_timer(old_info);
2190         }
2191
2192         if (fbcon_is_inactive(vc, info) ||
2193             ops->blank_state != FB_BLANK_UNBLANK)
2194                 fbcon_del_cursor_timer(info);
2195         else
2196                 fbcon_add_cursor_timer(info);
2197
2198         set_blitting_type(vc, info);
2199         ops->cursor_reset = 1;
2200
2201         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2202                 ops->rotate = FB_ROTATE_UR;
2203                 set_blitting_type(vc, info);
2204         }
2205
2206         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2207         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2208
2209         if (p->userfont)
2210                 charcnt = FNTCHARCNT(vc->vc_font.data);
2211
2212         if (charcnt > 256)
2213                 vc->vc_complement_mask <<= 1;
2214
2215         updatescrollmode(p, info, vc);
2216
2217         switch (p->scrollmode) {
2218         case SCROLL_WRAP_MOVE:
2219                 scrollback_phys_max = p->vrows - vc->vc_rows;
2220                 break;
2221         case SCROLL_PAN_MOVE:
2222         case SCROLL_PAN_REDRAW:
2223                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2224                 if (scrollback_phys_max < 0)
2225                         scrollback_phys_max = 0;
2226                 break;
2227         default:
2228                 scrollback_phys_max = 0;
2229                 break;
2230         }
2231
2232         scrollback_max = 0;
2233         scrollback_current = 0;
2234
2235         if (!fbcon_is_inactive(vc, info)) {
2236             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2237             ops->update_start(info);
2238         }
2239
2240         fbcon_set_palette(vc, color_table);
2241         fbcon_clear_margins(vc, 0);
2242
2243         if (logo_shown == FBCON_LOGO_DRAW) {
2244
2245                 logo_shown = fg_console;
2246                 /* This is protected above by initmem_freed */
2247                 fb_show_logo(info, ops->rotate);
2248                 update_region(vc,
2249                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2250                               vc->vc_size_row * (vc->vc_bottom -
2251                                                  vc->vc_top) / 2);
2252                 return 0;
2253         }
2254         return 1;
2255 }
2256
2257 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2258                                 int blank)
2259 {
2260         struct fb_event event;
2261
2262         if (blank) {
2263                 unsigned short charmask = vc->vc_hi_font_mask ?
2264                         0x1ff : 0xff;
2265                 unsigned short oldc;
2266
2267                 oldc = vc->vc_video_erase_char;
2268                 vc->vc_video_erase_char &= charmask;
2269                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2270                 vc->vc_video_erase_char = oldc;
2271         }
2272
2273
2274         event.info = info;
2275         event.data = &blank;
2276         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2277 }
2278
2279 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2280 {
2281         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2282         struct fbcon_ops *ops = info->fbcon_par;
2283
2284         if (mode_switch) {
2285                 struct fb_var_screeninfo var = info->var;
2286
2287                 ops->graphics = 1;
2288
2289                 if (!blank) {
2290                         if (info->fbops->fb_save_state)
2291                                 info->fbops->fb_save_state(info);
2292                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2293                         fb_set_var(info, &var);
2294                         ops->graphics = 0;
2295                         ops->var = info->var;
2296                 } else if (info->fbops->fb_restore_state)
2297                         info->fbops->fb_restore_state(info);
2298         }
2299
2300         if (!fbcon_is_inactive(vc, info)) {
2301                 if (ops->blank_state != blank) {
2302                         ops->blank_state = blank;
2303                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2304                         ops->cursor_flash = (!blank);
2305
2306                         if (fb_blank(info, blank))
2307                                 fbcon_generic_blank(vc, info, blank);
2308                 }
2309
2310                 if (!blank)
2311                         update_screen(vc);
2312         }
2313
2314         if (fbcon_is_inactive(vc, info) ||
2315             ops->blank_state != FB_BLANK_UNBLANK)
2316                 fbcon_del_cursor_timer(info);
2317         else
2318                 fbcon_add_cursor_timer(info);
2319
2320         return 0;
2321 }
2322
2323 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2324 {
2325         u8 *fontdata = vc->vc_font.data;
2326         u8 *data = font->data;
2327         int i, j;
2328
2329         font->width = vc->vc_font.width;
2330         font->height = vc->vc_font.height;
2331         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2332         if (!font->data)
2333                 return 0;
2334
2335         if (font->width <= 8) {
2336                 j = vc->vc_font.height;
2337                 for (i = 0; i < font->charcount; i++) {
2338                         memcpy(data, fontdata, j);
2339                         memset(data + j, 0, 32 - j);
2340                         data += 32;
2341                         fontdata += j;
2342                 }
2343         } else if (font->width <= 16) {
2344                 j = vc->vc_font.height * 2;
2345                 for (i = 0; i < font->charcount; i++) {
2346                         memcpy(data, fontdata, j);
2347                         memset(data + j, 0, 64 - j);
2348                         data += 64;
2349                         fontdata += j;
2350                 }
2351         } else if (font->width <= 24) {
2352                 for (i = 0; i < font->charcount; i++) {
2353                         for (j = 0; j < vc->vc_font.height; j++) {
2354                                 *data++ = fontdata[0];
2355                                 *data++ = fontdata[1];
2356                                 *data++ = fontdata[2];
2357                                 fontdata += sizeof(u32);
2358                         }
2359                         memset(data, 0, 3 * (32 - j));
2360                         data += 3 * (32 - j);
2361                 }
2362         } else {
2363                 j = vc->vc_font.height * 4;
2364                 for (i = 0; i < font->charcount; i++) {
2365                         memcpy(data, fontdata, j);
2366                         memset(data + j, 0, 128 - j);
2367                         data += 128;
2368                         fontdata += j;
2369                 }
2370         }
2371         return 0;
2372 }
2373
2374 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2375                              const u8 * data, int userfont)
2376 {
2377         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2378         struct fbcon_ops *ops = info->fbcon_par;
2379         struct display *p = &fb_display[vc->vc_num];
2380         int resize;
2381         int cnt;
2382         char *old_data = NULL;
2383
2384         if (CON_IS_VISIBLE(vc) && softback_lines)
2385                 fbcon_set_origin(vc);
2386
2387         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2388         if (p->userfont)
2389                 old_data = vc->vc_font.data;
2390         if (userfont)
2391                 cnt = FNTCHARCNT(data);
2392         else
2393                 cnt = 256;
2394         vc->vc_font.data = (void *)(p->fontdata = data);
2395         if ((p->userfont = userfont))
2396                 REFCOUNT(data)++;
2397         vc->vc_font.width = w;
2398         vc->vc_font.height = h;
2399         if (vc->vc_hi_font_mask && cnt == 256) {
2400                 vc->vc_hi_font_mask = 0;
2401                 if (vc->vc_can_do_color) {
2402                         vc->vc_complement_mask >>= 1;
2403                         vc->vc_s_complement_mask >>= 1;
2404                 }
2405
2406                 /* ++Edmund: reorder the attribute bits */
2407                 if (vc->vc_can_do_color) {
2408                         unsigned short *cp =
2409                             (unsigned short *) vc->vc_origin;
2410                         int count = vc->vc_screenbuf_size / 2;
2411                         unsigned short c;
2412                         for (; count > 0; count--, cp++) {
2413                                 c = scr_readw(cp);
2414                                 scr_writew(((c & 0xfe00) >> 1) |
2415                                            (c & 0xff), cp);
2416                         }
2417                         c = vc->vc_video_erase_char;
2418                         vc->vc_video_erase_char =
2419                             ((c & 0xfe00) >> 1) | (c & 0xff);
2420                         vc->vc_attr >>= 1;
2421                 }
2422         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2423                 vc->vc_hi_font_mask = 0x100;
2424                 if (vc->vc_can_do_color) {
2425                         vc->vc_complement_mask <<= 1;
2426                         vc->vc_s_complement_mask <<= 1;
2427                 }
2428
2429                 /* ++Edmund: reorder the attribute bits */
2430                 {
2431                         unsigned short *cp =
2432                             (unsigned short *) vc->vc_origin;
2433                         int count = vc->vc_screenbuf_size / 2;
2434                         unsigned short c;
2435                         for (; count > 0; count--, cp++) {
2436                                 unsigned short newc;
2437                                 c = scr_readw(cp);
2438                                 if (vc->vc_can_do_color)
2439                                         newc =
2440                                             ((c & 0xff00) << 1) | (c &
2441                                                                    0xff);
2442                                 else
2443                                         newc = c & ~0x100;
2444                                 scr_writew(newc, cp);
2445                         }
2446                         c = vc->vc_video_erase_char;
2447                         if (vc->vc_can_do_color) {
2448                                 vc->vc_video_erase_char =
2449                                     ((c & 0xff00) << 1) | (c & 0xff);
2450                                 vc->vc_attr <<= 1;
2451                         } else
2452                                 vc->vc_video_erase_char = c & ~0x100;
2453                 }
2454
2455         }
2456
2457         if (resize) {
2458                 int cols, rows;
2459
2460                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2461                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2462                 cols /= w;
2463                 rows /= h;
2464                 vc_resize(vc, cols, rows);
2465                 if (CON_IS_VISIBLE(vc) && softback_buf)
2466                         fbcon_update_softback(vc);
2467         } else if (CON_IS_VISIBLE(vc)
2468                    && vc->vc_mode == KD_TEXT) {
2469                 fbcon_clear_margins(vc, 0);
2470                 update_screen(vc);
2471         }
2472
2473         if (old_data && (--REFCOUNT(old_data) == 0))
2474                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2475         return 0;
2476 }
2477
2478 static int fbcon_copy_font(struct vc_data *vc, int con)
2479 {
2480         struct display *od = &fb_display[con];
2481         struct console_font *f = &vc->vc_font;
2482
2483         if (od->fontdata == f->data)
2484                 return 0;       /* already the same font... */
2485         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2486 }
2487
2488 /*
2489  *  User asked to set font; we are guaranteed that
2490  *      a) width and height are in range 1..32
2491  *      b) charcount does not exceed 512
2492  *  but lets not assume that, since someone might someday want to use larger
2493  *  fonts. And charcount of 512 is small for unicode support.
2494  *
2495  *  However, user space gives the font in 32 rows , regardless of
2496  *  actual font height. So a new API is needed if support for larger fonts
2497  *  is ever implemented.
2498  */
2499
2500 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2501 {
2502         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2503         unsigned charcount = font->charcount;
2504         int w = font->width;
2505         int h = font->height;
2506         int size;
2507         int i, csum;
2508         u8 *new_data, *data = font->data;
2509         int pitch = (font->width+7) >> 3;
2510
2511         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2512          * If not this check should be changed to charcount < 256 */
2513         if (charcount != 256 && charcount != 512)
2514                 return -EINVAL;
2515
2516         /* Make sure drawing engine can handle the font */
2517         if (!(info->pixmap.blit_x & (1 << (font->width - 1))) ||
2518             !(info->pixmap.blit_y & (1 << (font->height - 1))))
2519                 return -EINVAL;
2520
2521         size = h * pitch * charcount;
2522
2523         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2524
2525         if (!new_data)
2526                 return -ENOMEM;
2527
2528         new_data += FONT_EXTRA_WORDS * sizeof(int);
2529         FNTSIZE(new_data) = size;
2530         FNTCHARCNT(new_data) = charcount;
2531         REFCOUNT(new_data) = 0; /* usage counter */
2532         for (i=0; i< charcount; i++) {
2533                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2534         }
2535
2536         /* Since linux has a nice crc32 function use it for counting font
2537          * checksums. */
2538         csum = crc32(0, new_data, size);
2539
2540         FNTSUM(new_data) = csum;
2541         /* Check if the same font is on some other console already */
2542         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2543                 struct vc_data *tmp = vc_cons[i].d;
2544
2545                 if (fb_display[i].userfont &&
2546                     fb_display[i].fontdata &&
2547                     FNTSUM(fb_display[i].fontdata) == csum &&
2548                     FNTSIZE(fb_display[i].fontdata) == size &&
2549                     tmp->vc_font.width == w &&
2550                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2551                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2552                         new_data = (u8 *)fb_display[i].fontdata;
2553                         break;
2554                 }
2555         }
2556         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2557 }
2558
2559 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2560 {
2561         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2562         const struct font_desc *f;
2563
2564         if (!name)
2565                 f = get_default_font(info->var.xres, info->var.yres,
2566                                      info->pixmap.blit_x, info->pixmap.blit_y);
2567         else if (!(f = find_font(name)))
2568                 return -ENOENT;
2569
2570         font->width = f->width;
2571         font->height = f->height;
2572         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2573 }
2574
2575 static u16 palette_red[16];
2576 static u16 palette_green[16];
2577 static u16 palette_blue[16];
2578
2579 static struct fb_cmap palette_cmap = {
2580         0, 16, palette_red, palette_green, palette_blue, NULL
2581 };
2582
2583 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2584 {
2585         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2586         int i, j, k, depth;
2587         u8 val;
2588
2589         if (fbcon_is_inactive(vc, info))
2590                 return -EINVAL;
2591
2592         if (!CON_IS_VISIBLE(vc))
2593                 return 0;
2594
2595         depth = fb_get_color_depth(&info->var, &info->fix);
2596         if (depth > 3) {
2597                 for (i = j = 0; i < 16; i++) {
2598                         k = table[i];
2599                         val = vc->vc_palette[j++];
2600                         palette_red[k] = (val << 8) | val;
2601                         val = vc->vc_palette[j++];
2602                         palette_green[k] = (val << 8) | val;
2603                         val = vc->vc_palette[j++];
2604                         palette_blue[k] = (val << 8) | val;
2605                 }
2606                 palette_cmap.len = 16;
2607                 palette_cmap.start = 0;
2608         /*
2609          * If framebuffer is capable of less than 16 colors,
2610          * use default palette of fbcon.
2611          */
2612         } else
2613                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2614
2615         return fb_set_cmap(&palette_cmap, info);
2616 }
2617
2618 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2619 {
2620         unsigned long p;
2621         int line;
2622
2623         if (vc->vc_num != fg_console || !softback_lines)
2624                 return (u16 *) (vc->vc_origin + offset);
2625         line = offset / vc->vc_size_row;
2626         if (line >= softback_lines)
2627                 return (u16 *) (vc->vc_origin + offset -
2628                                 softback_lines * vc->vc_size_row);
2629         p = softback_curr + offset;
2630         if (p >= softback_end)
2631                 p += softback_buf - softback_end;
2632         return (u16 *) p;
2633 }
2634
2635 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2636                                  int *px, int *py)
2637 {
2638         unsigned long ret;
2639         int x, y;
2640
2641         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2642                 unsigned long offset = (pos - vc->vc_origin) / 2;
2643
2644                 x = offset % vc->vc_cols;
2645                 y = offset / vc->vc_cols;
2646                 if (vc->vc_num == fg_console)
2647                         y += softback_lines;
2648                 ret = pos + (vc->vc_cols - x) * 2;
2649         } else if (vc->vc_num == fg_console && softback_lines) {
2650                 unsigned long offset = pos - softback_curr;
2651
2652                 if (pos < softback_curr)
2653                         offset += softback_end - softback_buf;
2654                 offset /= 2;
2655                 x = offset % vc->vc_cols;
2656                 y = offset / vc->vc_cols;
2657                 ret = pos + (vc->vc_cols - x) * 2;
2658                 if (ret == softback_end)
2659                         ret = softback_buf;
2660                 if (ret == softback_in)
2661                         ret = vc->vc_origin;
2662         } else {
2663                 /* Should not happen */
2664                 x = y = 0;
2665                 ret = vc->vc_origin;
2666         }
2667         if (px)
2668                 *px = x;
2669         if (py)
2670                 *py = y;
2671         return ret;
2672 }
2673
2674 /* As we might be inside of softback, we may work with non-contiguous buffer,
2675    that's why we have to use a separate routine. */
2676 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2677 {
2678         while (cnt--) {
2679                 u16 a = scr_readw(p);
2680                 if (!vc->vc_can_do_color)
2681                         a ^= 0x0800;
2682                 else if (vc->vc_hi_font_mask == 0x100)
2683                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2684                             (((a) & 0x0e00) << 4);
2685                 else
2686                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2687                             (((a) & 0x0700) << 4);
2688                 scr_writew(a, p++);
2689                 if (p == (u16 *) softback_end)
2690                         p = (u16 *) softback_buf;
2691                 if (p == (u16 *) softback_in)
2692                         p = (u16 *) vc->vc_origin;
2693         }
2694 }
2695
2696 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2697 {
2698         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2699         struct fbcon_ops *ops = info->fbcon_par;
2700         struct display *p = &fb_display[fg_console];
2701         int offset, limit, scrollback_old;
2702
2703         if (softback_top) {
2704                 if (vc->vc_num != fg_console)
2705                         return 0;
2706                 if (vc->vc_mode != KD_TEXT || !lines)
2707                         return 0;
2708                 if (logo_shown >= 0) {
2709                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2710
2711                         if (conp2->vc_top == logo_lines
2712                             && conp2->vc_bottom == conp2->vc_rows)
2713                                 conp2->vc_top = 0;
2714                         if (logo_shown == vc->vc_num) {
2715                                 unsigned long p, q;
2716                                 int i;
2717
2718                                 p = softback_in;
2719                                 q = vc->vc_origin +
2720                                     logo_lines * vc->vc_size_row;
2721                                 for (i = 0; i < logo_lines; i++) {
2722                                         if (p == softback_top)
2723                                                 break;
2724                                         if (p == softback_buf)
2725                                                 p = softback_end;
2726                                         p -= vc->vc_size_row;
2727                                         q -= vc->vc_size_row;
2728                                         scr_memcpyw((u16 *) q, (u16 *) p,
2729                                                     vc->vc_size_row);
2730                                 }
2731                                 softback_in = softback_curr = p;
2732                                 update_region(vc, vc->vc_origin,
2733                                               logo_lines * vc->vc_cols);
2734                         }
2735                         logo_shown = FBCON_LOGO_CANSHOW;
2736                 }
2737                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2738                 fbcon_redraw_softback(vc, p, lines);
2739                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2740                 return 0;
2741         }
2742
2743         if (!scrollback_phys_max)
2744                 return -ENOSYS;
2745
2746         scrollback_old = scrollback_current;
2747         scrollback_current -= lines;
2748         if (scrollback_current < 0)
2749                 scrollback_current = 0;
2750         else if (scrollback_current > scrollback_max)
2751                 scrollback_current = scrollback_max;
2752         if (scrollback_current == scrollback_old)
2753                 return 0;
2754
2755         if (fbcon_is_inactive(vc, info))
2756                 return 0;
2757
2758         fbcon_cursor(vc, CM_ERASE);
2759
2760         offset = p->yscroll - scrollback_current;
2761         limit = p->vrows;
2762         switch (p->scrollmode) {
2763         case SCROLL_WRAP_MOVE:
2764                 info->var.vmode |= FB_VMODE_YWRAP;
2765                 break;
2766         case SCROLL_PAN_MOVE:
2767         case SCROLL_PAN_REDRAW:
2768                 limit -= vc->vc_rows;
2769                 info->var.vmode &= ~FB_VMODE_YWRAP;
2770                 break;
2771         }
2772         if (offset < 0)
2773                 offset += limit;
2774         else if (offset >= limit)
2775                 offset -= limit;
2776
2777         ops->var.xoffset = 0;
2778         ops->var.yoffset = offset * vc->vc_font.height;
2779         ops->update_start(info);
2780
2781         if (!scrollback_current)
2782                 fbcon_cursor(vc, CM_DRAW);
2783         return 0;
2784 }
2785
2786 static int fbcon_set_origin(struct vc_data *vc)
2787 {
2788         if (softback_lines)
2789                 fbcon_scrolldelta(vc, softback_lines);
2790         return 0;
2791 }
2792
2793 static void fbcon_suspended(struct fb_info *info)
2794 {
2795         struct vc_data *vc = NULL;
2796         struct fbcon_ops *ops = info->fbcon_par;
2797
2798         if (!ops || ops->currcon < 0)
2799                 return;
2800         vc = vc_cons[ops->currcon].d;
2801
2802         /* Clear cursor, restore saved data */
2803         fbcon_cursor(vc, CM_ERASE);
2804 }
2805
2806 static void fbcon_resumed(struct fb_info *info)
2807 {
2808         struct vc_data *vc;
2809         struct fbcon_ops *ops = info->fbcon_par;
2810
2811         if (!ops || ops->currcon < 0)
2812                 return;
2813         vc = vc_cons[ops->currcon].d;
2814
2815         update_screen(vc);
2816 }
2817
2818 static void fbcon_modechanged(struct fb_info *info)
2819 {
2820         struct fbcon_ops *ops = info->fbcon_par;
2821         struct vc_data *vc;
2822         struct display *p;
2823         int rows, cols;
2824
2825         if (!ops || ops->currcon < 0)
2826                 return;
2827         vc = vc_cons[ops->currcon].d;
2828         if (vc->vc_mode != KD_TEXT ||
2829             registered_fb[con2fb_map[ops->currcon]] != info)
2830                 return;
2831
2832         p = &fb_display[vc->vc_num];
2833         set_blitting_type(vc, info);
2834
2835         if (CON_IS_VISIBLE(vc)) {
2836                 var_to_display(p, &info->var, info);
2837                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2838                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2839                 cols /= vc->vc_font.width;
2840                 rows /= vc->vc_font.height;
2841                 vc_resize(vc, cols, rows);
2842                 updatescrollmode(p, info, vc);
2843                 scrollback_max = 0;
2844                 scrollback_current = 0;
2845
2846                 if (!fbcon_is_inactive(vc, info)) {
2847                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2848                     ops->update_start(info);
2849                 }
2850
2851                 fbcon_set_palette(vc, color_table);
2852                 update_screen(vc);
2853                 if (softback_buf)
2854                         fbcon_update_softback(vc);
2855         }
2856 }
2857
2858 static void fbcon_set_all_vcs(struct fb_info *info)
2859 {
2860         struct fbcon_ops *ops = info->fbcon_par;
2861         struct vc_data *vc;
2862         struct display *p;
2863         int i, rows, cols, fg = -1;
2864
2865         if (!ops || ops->currcon < 0)
2866                 return;
2867
2868         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2869                 vc = vc_cons[i].d;
2870                 if (!vc || vc->vc_mode != KD_TEXT ||
2871                     registered_fb[con2fb_map[i]] != info)
2872                         continue;
2873
2874                 if (CON_IS_VISIBLE(vc)) {
2875                         fg = i;
2876                         continue;
2877                 }
2878
2879                 p = &fb_display[vc->vc_num];
2880                 set_blitting_type(vc, info);
2881                 var_to_display(p, &info->var, info);
2882                 cols = FBCON_SWAP(p->rotate, info->var.xres, info->var.yres);
2883                 rows = FBCON_SWAP(p->rotate, info->var.yres, info->var.xres);
2884                 cols /= vc->vc_font.width;
2885                 rows /= vc->vc_font.height;
2886                 vc_resize(vc, cols, rows);
2887         }
2888
2889         if (fg != -1)
2890                 fbcon_modechanged(info);
2891 }
2892
2893 static int fbcon_mode_deleted(struct fb_info *info,
2894                               struct fb_videomode *mode)
2895 {
2896         struct fb_info *fb_info;
2897         struct display *p;
2898         int i, j, found = 0;
2899
2900         /* before deletion, ensure that mode is not in use */
2901         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2902                 j = con2fb_map[i];
2903                 if (j == -1)
2904                         continue;
2905                 fb_info = registered_fb[j];
2906                 if (fb_info != info)
2907                         continue;
2908                 p = &fb_display[i];
2909                 if (!p || !p->mode)
2910                         continue;
2911                 if (fb_mode_is_equal(p->mode, mode)) {
2912                         found = 1;
2913                         break;
2914                 }
2915         }
2916         return found;
2917 }
2918
2919 static int fbcon_fb_unregistered(int idx)
2920 {
2921         int i;
2922
2923         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2924                 if (con2fb_map[i] == idx)
2925                         con2fb_map[i] = -1;
2926         }
2927
2928         if (idx == info_idx) {
2929                 info_idx = -1;
2930
2931                 for (i = 0; i < FB_MAX; i++) {
2932                         if (registered_fb[i] != NULL) {
2933                                 info_idx = i;
2934                                 break;
2935                         }
2936                 }
2937         }
2938
2939         if (info_idx != -1) {
2940                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2941                         if (con2fb_map[i] == -1)
2942                                 con2fb_map[i] = info_idx;
2943                 }
2944         }
2945
2946         if (!num_registered_fb)
2947                 unregister_con_driver(&fb_con);
2948
2949         return 0;
2950 }
2951
2952 static int fbcon_fb_registered(int idx)
2953 {
2954         int ret = 0, i;
2955
2956         if (info_idx == -1) {
2957                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2958                         if (con2fb_map_boot[i] == idx) {
2959                                 info_idx = idx;
2960                                 break;
2961                         }
2962                 }
2963
2964                 if (info_idx != -1)
2965                         ret = fbcon_takeover(1);
2966         } else {
2967                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2968                         if (con2fb_map_boot[i] == idx &&
2969                             con2fb_map[i] == -1)
2970                                 set_con2fb_map(i, idx, 0);
2971                 }
2972         }
2973
2974         return ret;
2975 }
2976
2977 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2978 {
2979         struct fbcon_ops *ops = info->fbcon_par;
2980         struct vc_data *vc;
2981
2982         if (!ops || ops->currcon < 0)
2983                 return;
2984
2985         vc = vc_cons[ops->currcon].d;
2986         if (vc->vc_mode != KD_TEXT ||
2987                         registered_fb[con2fb_map[ops->currcon]] != info)
2988                 return;
2989
2990         if (CON_IS_VISIBLE(vc)) {
2991                 if (blank)
2992                         do_blank_screen(0);
2993                 else
2994                         do_unblank_screen(0);
2995         }
2996         ops->blank_state = blank;
2997 }
2998
2999 static void fbcon_new_modelist(struct fb_info *info)
3000 {
3001         int i;
3002         struct vc_data *vc;
3003         struct fb_var_screeninfo var;
3004         const struct fb_videomode *mode;
3005
3006         for (i = first_fb_vc; i <= last_fb_vc; i++) {
3007                 if (registered_fb[con2fb_map[i]] != info)
3008                         continue;
3009                 if (!fb_display[i].mode)
3010                         continue;
3011                 vc = vc_cons[i].d;
3012                 display_to_var(&var, &fb_display[i]);
3013                 mode = fb_find_nearest_mode(fb_display[i].mode,
3014                                             &info->modelist);
3015                 fb_videomode_to_var(&var, mode);
3016
3017                 if (vc)
3018                         fbcon_set_disp(info, &var, vc);
3019                 else
3020                         fbcon_preset_disp(info, &var, i);
3021
3022         }
3023 }
3024
3025 static int fbcon_event_notify(struct notifier_block *self,
3026                               unsigned long action, void *data)
3027 {
3028         struct fb_event *event = data;
3029         struct fb_info *info = event->info;
3030         struct fb_videomode *mode;
3031         struct fb_con2fbmap *con2fb;
3032         int ret = 0;
3033
3034         /*
3035          * ignore all events except driver registration and deregistration
3036          * if fbcon is not active
3037          */
3038         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3039                                   action == FB_EVENT_FB_UNREGISTERED))
3040                 goto done;
3041
3042         switch(action) {
3043         case FB_EVENT_SUSPEND:
3044                 fbcon_suspended(info);
3045                 break;
3046         case FB_EVENT_RESUME:
3047                 fbcon_resumed(info);
3048                 break;
3049         case FB_EVENT_MODE_CHANGE:
3050                 fbcon_modechanged(info);
3051                 break;
3052         case FB_EVENT_MODE_CHANGE_ALL:
3053                 fbcon_set_all_vcs(info);
3054                 break;
3055         case FB_EVENT_MODE_DELETE:
3056                 mode = event->data;
3057                 ret = fbcon_mode_deleted(info, mode);
3058                 break;
3059         case FB_EVENT_FB_REGISTERED:
3060                 ret = fbcon_fb_registered(info->node);
3061                 break;
3062         case FB_EVENT_FB_UNREGISTERED:
3063                 ret = fbcon_fb_unregistered(info->node);
3064                 break;
3065         case FB_EVENT_SET_CONSOLE_MAP:
3066                 con2fb = event->data;
3067                 ret = set_con2fb_map(con2fb->console - 1,
3068                                      con2fb->framebuffer, 1);
3069                 break;
3070         case FB_EVENT_GET_CONSOLE_MAP:
3071                 con2fb = event->data;
3072                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3073                 break;
3074         case FB_EVENT_BLANK:
3075                 fbcon_fb_blanked(info, *(int *)event->data);
3076                 break;
3077         case FB_EVENT_NEW_MODELIST:
3078                 fbcon_new_modelist(info);
3079                 break;
3080         }
3081
3082 done:
3083         return ret;
3084 }
3085
3086 /*
3087  *  The console `switch' structure for the frame buffer based console
3088  */
3089
3090 static const struct consw fb_con = {
3091         .owner                  = THIS_MODULE,
3092         .con_startup            = fbcon_startup,
3093         .con_init               = fbcon_init,
3094         .con_deinit             = fbcon_deinit,
3095         .con_clear              = fbcon_clear,
3096         .con_putc               = fbcon_putc,
3097         .con_putcs              = fbcon_putcs,
3098         .con_cursor             = fbcon_cursor,
3099         .con_scroll             = fbcon_scroll,
3100         .con_bmove              = fbcon_bmove,
3101         .con_switch             = fbcon_switch,
3102         .con_blank              = fbcon_blank,
3103         .con_font_set           = fbcon_set_font,
3104         .con_font_get           = fbcon_get_font,
3105         .con_font_default       = fbcon_set_def_font,
3106         .con_font_copy          = fbcon_copy_font,
3107         .con_set_palette        = fbcon_set_palette,
3108         .con_scrolldelta        = fbcon_scrolldelta,
3109         .con_set_origin         = fbcon_set_origin,
3110         .con_invert_region      = fbcon_invert_region,
3111         .con_screen_pos         = fbcon_screen_pos,
3112         .con_getxy              = fbcon_getxy,
3113         .con_resize             = fbcon_resize,
3114 };
3115
3116 static struct notifier_block fbcon_event_notifier = {
3117         .notifier_call  = fbcon_event_notify,
3118 };
3119
3120 static ssize_t store_rotate(struct class_device *class_device,
3121                             const char *buf, size_t count)
3122 {
3123         struct fb_info *info;
3124         int rotate, idx;
3125         char **last = NULL;
3126
3127         if (fbcon_has_exited)
3128                 return count;
3129
3130         acquire_console_sem();
3131         idx = con2fb_map[fg_console];
3132
3133         if (idx == -1 || registered_fb[idx] == NULL)
3134                 goto err;
3135
3136         info = registered_fb[idx];
3137         rotate = simple_strtoul(buf, last, 0);
3138         fbcon_rotate(info, rotate);
3139 err:
3140         release_console_sem();
3141         return count;
3142 }
3143
3144 static ssize_t store_rotate_all(struct class_device *class_device,
3145                                 const char *buf, size_t count)
3146 {
3147         struct fb_info *info;
3148         int rotate, idx;
3149         char **last = NULL;
3150
3151         if (fbcon_has_exited)
3152                 return count;
3153
3154         acquire_console_sem();
3155         idx = con2fb_map[fg_console];
3156
3157         if (idx == -1 || registered_fb[idx] == NULL)
3158                 goto err;
3159
3160         info = registered_fb[idx];
3161         rotate = simple_strtoul(buf, last, 0);
3162         fbcon_rotate_all(info, rotate);
3163 err:
3164         release_console_sem();
3165         return count;
3166 }
3167
3168 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3169 {
3170         struct fb_info *info;
3171         int rotate = 0, idx;
3172
3173         if (fbcon_has_exited)
3174                 return 0;
3175
3176         acquire_console_sem();
3177         idx = con2fb_map[fg_console];
3178
3179         if (idx == -1 || registered_fb[idx] == NULL)
3180                 goto err;
3181
3182         info = registered_fb[idx];
3183         rotate = fbcon_get_rotate(info);
3184 err:
3185         release_console_sem();
3186         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3187 }
3188
3189 static struct class_device_attribute class_device_attrs[] = {
3190         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3191         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3192 };
3193
3194 static int fbcon_init_class_device(void)
3195 {
3196         int i, error = 0;
3197
3198         fbcon_has_sysfs = 1;
3199
3200         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3201                 error = class_device_create_file(fbcon_class_device,
3202                                                  &class_device_attrs[i]);
3203
3204                 if (error)
3205                         break;
3206         }
3207
3208         if (error) {
3209                 while (--i >= 0)
3210                         class_device_remove_file(fbcon_class_device,
3211                                                  &class_device_attrs[i]);
3212
3213                 fbcon_has_sysfs = 0;
3214         }
3215
3216         return 0;
3217 }
3218
3219 static void fbcon_start(void)
3220 {
3221         if (num_registered_fb) {
3222                 int i;
3223
3224                 acquire_console_sem();
3225
3226                 for (i = 0; i < FB_MAX; i++) {
3227                         if (registered_fb[i] != NULL) {
3228                                 info_idx = i;
3229                                 break;
3230                         }
3231                 }
3232
3233                 release_console_sem();
3234                 fbcon_takeover(0);
3235         }
3236 }
3237
3238 static void fbcon_exit(void)
3239 {
3240         struct fb_info *info;
3241         int i, j, mapped;
3242
3243         if (fbcon_has_exited)
3244                 return;
3245
3246 #ifdef CONFIG_ATARI
3247         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3248 #endif
3249 #ifdef CONFIG_MAC
3250         if (MACH_IS_MAC && vbl_detected)
3251                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3252 #endif
3253
3254         kfree((void *)softback_buf);
3255         softback_buf = 0UL;
3256
3257         for (i = 0; i < FB_MAX; i++) {
3258                 mapped = 0;
3259                 info = registered_fb[i];
3260
3261                 if (info == NULL)
3262                         continue;
3263
3264                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3265                         if (con2fb_map[j] == i)
3266                                 mapped = 1;
3267                 }
3268
3269                 if (mapped) {
3270                         if (info->fbops->fb_release)
3271                                 info->fbops->fb_release(info, 0);
3272                         module_put(info->fbops->owner);
3273
3274                         if (info->fbcon_par) {
3275                                 struct fbcon_ops *ops = info->fbcon_par;
3276
3277                                 fbcon_del_cursor_timer(info);
3278                                 kfree(ops->cursor_src);
3279                                 kfree(info->fbcon_par);
3280                                 info->fbcon_par = NULL;
3281                         }
3282
3283                         if (info->queue.func == fb_flashcursor)
3284                                 info->queue.func = NULL;
3285                 }
3286         }
3287
3288         fbcon_has_exited = 1;
3289 }
3290
3291 static int __init fb_console_init(void)
3292 {
3293         int i;
3294
3295         acquire_console_sem();
3296         fb_register_client(&fbcon_event_notifier);
3297         fbcon_class_device =
3298             class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3299
3300         if (IS_ERR(fbcon_class_device)) {
3301                 printk(KERN_WARNING "Unable to create class_device "
3302                        "for fbcon; errno = %ld\n",
3303                        PTR_ERR(fbcon_class_device));
3304                 fbcon_class_device = NULL;
3305         } else
3306                 fbcon_init_class_device();
3307
3308         for (i = 0; i < MAX_NR_CONSOLES; i++)
3309                 con2fb_map[i] = -1;
3310
3311         release_console_sem();
3312         fbcon_start();
3313         return 0;
3314 }
3315
3316 module_init(fb_console_init);
3317
3318 #ifdef MODULE
3319
3320 static void __exit fbcon_deinit_class_device(void)
3321 {
3322         int i;
3323
3324         if (fbcon_has_sysfs) {
3325                 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3326                         class_device_remove_file(fbcon_class_device,
3327                                                  &class_device_attrs[i]);
3328
3329                 fbcon_has_sysfs = 0;
3330         }
3331 }
3332
3333 static void __exit fb_console_exit(void)
3334 {
3335         acquire_console_sem();
3336         fb_unregister_client(&fbcon_event_notifier);
3337         fbcon_deinit_class_device();
3338         class_device_destroy(fb_class, MKDEV(0, 0));
3339         fbcon_exit();
3340         release_console_sem();
3341         unregister_con_driver(&fb_con);
3342 }
3343
3344 module_exit(fb_console_exit);
3345
3346 #endif
3347
3348 MODULE_LICENSE("GPL");