git.oblomov.eu Git - linux-2.6/blob - 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/sched.h>
  64 #include <linux/fs.h>
  65 #include <linux/kernel.h>
  66 #include <linux/delay.h>        /* MSch: for IRQ probe */
  67 #include <linux/tty.h>
  68 #include <linux/console.h>
  69 #include <linux/string.h>
  70 #include <linux/kd.h>
  71 #include <linux/slab.h>
  72 #include <linux/fb.h>
  73 #include <linux/vt_kern.h>
  74 #include <linux/selection.h>
  75 #include <linux/font.h>
  76 #include <linux/smp.h>
  77 #include <linux/init.h>
  78 #include <linux/interrupt.h>
  79 #include <linux/crc32.h> /* For counting font checksums */
  80 #include <asm/irq.h>
  81 #include <asm/system.h>
  82 #include <asm/uaccess.h>
  83 #ifdef CONFIG_ATARI
  84 #include <asm/atariints.h>
  85 #endif
  86 #ifdef CONFIG_MAC
  87 #include <asm/macints.h>
  88 #endif
  89 #if defined(__mc68000__) || defined(CONFIG_APUS)
  90 #include <asm/machdep.h>
  91 #include <asm/setup.h>
  92 #endif
  93
  94 #include "fbcon.h"
  95
  96 #ifdef FBCONDEBUG
  97 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
  98 #else
  99 #  define DPRINTK(fmt, args...)
 100 #endif
 101
 102 enum {
 103         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 104         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 105         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 106 };
 107
 108 static struct display fb_display[MAX_NR_CONSOLES];
 109
 110 static signed char con2fb_map[MAX_NR_CONSOLES];
 111 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 112 static int logo_height;
 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
 138 static const struct consw fb_con;
 139
 140 #define CM_SOFTBACK     (8)
 141
 142 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 143
 144 static int fbcon_set_origin(struct vc_data *);
 145
 146 #define CURSOR_DRAW_DELAY               (1)
 147
 148 /* # VBL ints between cursor state changes */
 149 #define ATARI_CURSOR_BLINK_RATE         (42)
 150 #define MAC_CURSOR_BLINK_RATE           (32)
 151 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 152
 153 static int vbl_cursor_cnt;
 154
 155 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 156
 157 /*
 158  *  Interface used by the world
 159  */
 160
 161 static const char *fbcon_startup(void);
 162 static void fbcon_init(struct vc_data *vc, int init);
 163 static void fbcon_deinit(struct vc_data *vc);
 164 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 165                         int width);
 166 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 167 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 168                         int count, int ypos, int xpos);
 169 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 170 static void fbcon_cursor(struct vc_data *vc, int mode);
 171 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 172                         int count);
 173 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 174                         int height, int width);
 175 static int fbcon_switch(struct vc_data *vc);
 176 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 177 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 178 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 179
 180 /*
 181  *  Internal routines
 182  */
 183 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 184 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 185 static __inline__ void ypan_up(struct vc_data *vc, int count);
 186 static __inline__ void ypan_down(struct vc_data *vc, int count);
 187 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 188                             int dy, int dx, int height, int width, u_int y_break);
 189 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 190                            struct vc_data *vc);
 191 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 192                               int unit);
 193 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 194                               int line, int count, int dy);
 195 static void fbcon_modechanged(struct fb_info *info);
 196 static void fbcon_set_all_vcs(struct fb_info *info);
 197 static void fbcon_start(void);
 198 static void fbcon_exit(void);
 199 static struct class_device *fbcon_class_device;
 200
 201 #ifdef CONFIG_MAC
 202 /*
 203  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 204  */
 205 static int vbl_detected;
 206
 207 static irqreturn_t fb_vbl_detect(int irq, void *dummy, struct pt_regs *fp)
 208 {
 209         vbl_detected++;
 210         return IRQ_HANDLED;
 211 }
 212 #endif
 213
 214 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 215 static inline void fbcon_set_rotation(struct fb_info *info)
 216 {
 217         struct fbcon_ops *ops = info->fbcon_par;
 218
 219         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 220             ops->p->con_rotate < 4)
 221                 ops->rotate = ops->p->con_rotate;
 222         else
 223                 ops->rotate = 0;
 224 }
 225
 226 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 227 {
 228         struct fbcon_ops *ops= info->fbcon_par;
 229         struct fb_info *fb_info;
 230
 231         if (!ops || ops->currcon == -1)
 232                 return;
 233
 234         fb_info = registered_fb[con2fb_map[ops->currcon]];
 235
 236         if (info == fb_info) {
 237                 struct display *p = &fb_display[ops->currcon];
 238
 239                 if (rotate < 4)
 240                         p->con_rotate = rotate;
 241                 else
 242                         p->con_rotate = 0;
 243
 244                 fbcon_modechanged(info);
 245         }
 246 }
 247
 248 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 249 {
 250         struct fbcon_ops *ops = info->fbcon_par;
 251         struct vc_data *vc;
 252         struct display *p;
 253         int i;
 254
 255         if (!ops || ops->currcon < 0 || rotate > 3)
 256                 return;
 257
 258         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 259                 vc = vc_cons[i].d;
 260                 if (!vc || vc->vc_mode != KD_TEXT ||
 261                     registered_fb[con2fb_map[i]] != info)
 262                         continue;
 263
 264                 p = &fb_display[vc->vc_num];
 265                 p->con_rotate = rotate;
 266         }
 267
 268         fbcon_set_all_vcs(info);
 269 }
 270 #else
 271 static inline void fbcon_set_rotation(struct fb_info *info)
 272 {
 273         struct fbcon_ops *ops = info->fbcon_par;
 274
 275         ops->rotate = FB_ROTATE_UR;
 276 }
 277
 278 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 279 {
 280         return;
 281 }
 282
 283 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 284 {
 285         return;
 286 }
 287 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 288
 289 static int fbcon_get_rotate(struct fb_info *info)
 290 {
 291         struct fbcon_ops *ops = info->fbcon_par;
 292
 293         return (ops) ? ops->rotate : 0;
 294 }
 295
 296 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 297 {
 298         struct fbcon_ops *ops = info->fbcon_par;
 299
 300         return (info->state != FBINFO_STATE_RUNNING ||
 301                 vc->vc_mode != KD_TEXT || ops->graphics);
 302 }
 303
 304 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 305               u16 c, int is_fg)
 306 {
 307         int depth = fb_get_color_depth(&info->var, &info->fix);
 308         int color = 0;
 309
 310         if (console_blanked) {
 311                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 312
 313                 c = vc->vc_video_erase_char & charmask;
 314         }
 315
 316         if (depth != 1)
 317                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 318                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 319
 320         switch (depth) {
 321         case 1:
 322         {
 323                 int col = ~(0xfff << (max(info->var.green.length,
 324                                           max(info->var.red.length,
 325                                               info->var.blue.length)))) & 0xff;
 326
 327                 /* 0 or 1 */
 328                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 329                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 330
 331                 if (console_blanked)
 332                         fg = bg;
 333
 334                 color = (is_fg) ? fg : bg;
 335                 break;
 336         }
 337         case 2:
 338                 /*
 339                  * Scale down 16-colors to 4 colors. Default 4-color palette
 340                  * is grayscale. However, simply dividing the values by 4
 341                  * will not work, as colors 1, 2 and 3 will be scaled-down
 342                  * to zero rendering them invisible.  So empirically convert
 343                  * colors to a sane 4-level grayscale.
 344                  */
 345                 switch (color) {
 346                 case 0:
 347                         color = 0; /* black */
 348                         break;
 349                 case 1 ... 6:
 350                         color = 2; /* white */
 351                         break;
 352                 case 7 ... 8:
 353                         color = 1; /* gray */
 354                         break;
 355                 default:
 356                         color = 3; /* intense white */
 357                         break;
 358                 }
 359                 break;
 360         case 3:
 361                 /*
 362                  * Last 8 entries of default 16-color palette is a more intense
 363                  * version of the first 8 (i.e., same chrominance, different
 364                  * luminance).
 365                  */
 366                 color &= 7;
 367                 break;
 368         }
 369
 370
 371         return color;
 372 }
 373
 374 static void fbcon_update_softback(struct vc_data *vc)
 375 {
 376         int l = fbcon_softback_size / vc->vc_size_row;
 377
 378         if (l > 5)
 379                 softback_end = softback_buf + l * vc->vc_size_row;
 380         else
 381                 /* Smaller scrollback makes no sense, and 0 would screw
 382                    the operation totally */
 383                 softback_top = 0;
 384 }
 385
 386 static void fb_flashcursor(void *private)
 387 {
 388         struct fb_info *info = private;
 389         struct fbcon_ops *ops = info->fbcon_par;
 390         struct display *p;
 391         struct vc_data *vc = NULL;
 392         int c;
 393         int mode;
 394
 395         acquire_console_sem();
 396         if (ops && ops->currcon != -1)
 397                 vc = vc_cons[ops->currcon].d;
 398
 399         if (!vc || !CON_IS_VISIBLE(vc) ||
 400             fbcon_is_inactive(vc, info) ||
 401             registered_fb[con2fb_map[vc->vc_num]] != info ||
 402             vc_cons[ops->currcon].d->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, struct pt_regs *fp)
 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, info);
 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 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 582                                int cols, int rows, int new_cols, int new_rows)
 583 {
 584         /* Need to make room for the logo */
 585         struct fbcon_ops *ops = info->fbcon_par;
 586         int cnt, erase = vc->vc_video_erase_char, step;
 587         unsigned short *save = NULL, *r, *q;
 588
 589         /*
 590          * remove underline attribute from erase character
 591          * if black and white framebuffer.
 592          */
 593         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 594                 erase &= ~0x400;
 595         logo_height = fb_prepare_logo(info, ops->rotate);
 596         logo_lines = (logo_height + vc->vc_font.height - 1) /
 597                 vc->vc_font.height;
 598         q = (unsigned short *) (vc->vc_origin +
 599                                 vc->vc_size_row * rows);
 600         step = logo_lines * cols;
 601         for (r = q - logo_lines * cols; r < q; r++)
 602                 if (scr_readw(r) != vc->vc_video_erase_char)
 603                         break;
 604         if (r != q && new_rows >= rows + logo_lines) {
 605                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 606                 if (save) {
 607                         int i = cols < new_cols ? cols : new_cols;
 608                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 609                         r = q - step;
 610                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 611                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 612                         r = q;
 613                 }
 614         }
 615         if (r == q) {
 616                 /* We can scroll screen down */
 617                 r = q - step - cols;
 618                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 619                         scr_memcpyw(r + step, r, vc->vc_size_row);
 620                         r -= cols;
 621                 }
 622                 if (!save) {
 623                         vc->vc_y += logo_lines;
 624                         vc->vc_pos += logo_lines * vc->vc_size_row;
 625                 }
 626         }
 627         scr_memsetw((unsigned short *) vc->vc_origin,
 628                     erase,
 629                     vc->vc_size_row * logo_lines);
 630
 631         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 632                 fbcon_clear_margins(vc, 0);
 633                 update_screen(vc);
 634         }
 635
 636         if (save) {
 637                 q = (unsigned short *) (vc->vc_origin +
 638                                         vc->vc_size_row *
 639                                         rows);
 640                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 641                 vc->vc_y += logo_lines;
 642                 vc->vc_pos += logo_lines * vc->vc_size_row;
 643                 kfree(save);
 644         }
 645
 646         if (logo_lines > vc->vc_bottom) {
 647                 logo_shown = FBCON_LOGO_CANSHOW;
 648                 printk(KERN_INFO
 649                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 650         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 651                 logo_shown = FBCON_LOGO_DRAW;
 652                 vc->vc_top = logo_lines;
 653         }
 654 }
 655
 656 #ifdef CONFIG_FB_TILEBLITTING
 657 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 658 {
 659         struct fbcon_ops *ops = info->fbcon_par;
 660
 661         ops->p = &fb_display[vc->vc_num];
 662
 663         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 664                 fbcon_set_tileops(vc, info);
 665         else {
 666                 fbcon_set_rotation(info);
 667                 fbcon_set_bitops(ops);
 668         }
 669 }
 670 #else
 671 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 672 {
 673         struct fbcon_ops *ops = info->fbcon_par;
 674
 675         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 676         ops->p = &fb_display[vc->vc_num];
 677         fbcon_set_rotation(info);
 678         fbcon_set_bitops(ops);
 679 }
 680 #endif /* CONFIG_MISC_TILEBLITTING */
 681
 682
 683 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 684                                   int unit, int oldidx)
 685 {
 686         struct fbcon_ops *ops = NULL;
 687         int err = 0;
 688
 689         if (!try_module_get(info->fbops->owner))
 690                 err = -ENODEV;
 691
 692         if (!err && info->fbops->fb_open &&
 693             info->fbops->fb_open(info, 0))
 694                 err = -ENODEV;
 695
 696         if (!err) {
 697                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 698                 if (!ops)
 699                         err = -ENOMEM;
 700         }
 701
 702         if (!err) {
 703                 info->fbcon_par = ops;
 704                 set_blitting_type(vc, info);
 705         }
 706
 707         if (err) {
 708                 con2fb_map[unit] = oldidx;
 709                 module_put(info->fbops->owner);
 710         }
 711
 712         return err;
 713 }
 714
 715 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 716                                   struct fb_info *newinfo, int unit,
 717                                   int oldidx, int found)
 718 {
 719         struct fbcon_ops *ops = oldinfo->fbcon_par;
 720         int err = 0;
 721
 722         if (oldinfo->fbops->fb_release &&
 723             oldinfo->fbops->fb_release(oldinfo, 0)) {
 724                 con2fb_map[unit] = oldidx;
 725                 if (!found && newinfo->fbops->fb_release)
 726                         newinfo->fbops->fb_release(newinfo, 0);
 727                 if (!found)
 728                         module_put(newinfo->fbops->owner);
 729                 err = -ENODEV;
 730         }
 731
 732         if (!err) {
 733                 fbcon_del_cursor_timer(oldinfo);
 734                 kfree(ops->cursor_state.mask);
 735                 kfree(ops->cursor_data);
 736                 kfree(ops->fontbuffer);
 737                 kfree(oldinfo->fbcon_par);
 738                 oldinfo->fbcon_par = NULL;
 739                 module_put(oldinfo->fbops->owner);
 740                 /*
 741                   If oldinfo and newinfo are driving the same hardware,
 742                   the fb_release() method of oldinfo may attempt to
 743                   restore the hardware state.  This will leave the
 744                   newinfo in an undefined state. Thus, a call to
 745                   fb_set_par() may be needed for the newinfo.
 746                 */
 747                 if (newinfo->fbops->fb_set_par)
 748                         newinfo->fbops->fb_set_par(newinfo);
 749         }
 750
 751         return err;
 752 }
 753
 754 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 755                                 int unit, int show_logo)
 756 {
 757         struct fbcon_ops *ops = info->fbcon_par;
 758
 759         ops->currcon = fg_console;
 760
 761         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 762                 info->fbops->fb_set_par(info);
 763
 764         ops->flags |= FBCON_FLAGS_INIT;
 765         ops->graphics = 0;
 766
 767         if (vc)
 768                 fbcon_set_disp(info, &info->var, vc);
 769         else
 770                 fbcon_preset_disp(info, &info->var, unit);
 771
 772         if (show_logo) {
 773                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 774                 struct fb_info *fg_info =
 775                         registered_fb[con2fb_map[fg_console]];
 776
 777                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 778                                    fg_vc->vc_rows, fg_vc->vc_cols,
 779                                    fg_vc->vc_rows);
 780         }
 781
 782         update_screen(vc_cons[fg_console].d);
 783 }
 784
 785 /**
 786  *      set_con2fb_map - map console to frame buffer device
 787  *      @unit: virtual console number to map
 788  *      @newidx: frame buffer index to map virtual console to
 789  *      @user: user request
 790  *
 791  *      Maps a virtual console @unit to a frame buffer device
 792  *      @newidx.
 793  */
 794 static int set_con2fb_map(int unit, int newidx, int user)
 795 {
 796         struct vc_data *vc = vc_cons[unit].d;
 797         int oldidx = con2fb_map[unit];
 798         struct fb_info *info = registered_fb[newidx];
 799         struct fb_info *oldinfo = NULL;
 800         int found, err = 0;
 801
 802         if (oldidx == newidx)
 803                 return 0;
 804
 805         if (!info || fbcon_has_exited)
 806                 return -EINVAL;
 807
 808         if (!err && !search_for_mapped_con()) {
 809                 info_idx = newidx;
 810                 return fbcon_takeover(0);
 811         }
 812
 813         if (oldidx != -1)
 814                 oldinfo = registered_fb[oldidx];
 815
 816         found = search_fb_in_map(newidx);
 817
 818         acquire_console_sem();
 819         con2fb_map[unit] = newidx;
 820         if (!err && !found)
 821                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 822
 823
 824         /*
 825          * If old fb is not mapped to any of the consoles,
 826          * fbcon should release it.
 827          */
 828         if (!err && oldinfo && !search_fb_in_map(oldidx))
 829                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 830                                              found);
 831
 832         if (!err) {
 833                 int show_logo = (fg_console == 0 && !user &&
 834                                  logo_shown != FBCON_LOGO_DONTSHOW);
 835
 836                 if (!found)
 837                         fbcon_add_cursor_timer(info);
 838                 con2fb_map_boot[unit] = newidx;
 839                 con2fb_init_display(vc, info, unit, show_logo);
 840         }
 841
 842         if (!search_fb_in_map(info_idx))
 843                 info_idx = newidx;
 844
 845         release_console_sem();
 846         return err;
 847 }
 848
 849 /*
 850  *  Low Level Operations
 851  */
 852 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 853 static int var_to_display(struct display *disp,
 854                           struct fb_var_screeninfo *var,
 855                           struct fb_info *info)
 856 {
 857         disp->xres_virtual = var->xres_virtual;
 858         disp->yres_virtual = var->yres_virtual;
 859         disp->bits_per_pixel = var->bits_per_pixel;
 860         disp->grayscale = var->grayscale;
 861         disp->nonstd = var->nonstd;
 862         disp->accel_flags = var->accel_flags;
 863         disp->height = var->height;
 864         disp->width = var->width;
 865         disp->red = var->red;
 866         disp->green = var->green;
 867         disp->blue = var->blue;
 868         disp->transp = var->transp;
 869         disp->rotate = var->rotate;
 870         disp->mode = fb_match_mode(var, &info->modelist);
 871         if (disp->mode == NULL)
 872                 /* This should not happen */
 873                 return -EINVAL;
 874         return 0;
 875 }
 876
 877 static void display_to_var(struct fb_var_screeninfo *var,
 878                            struct display *disp)
 879 {
 880         fb_videomode_to_var(var, disp->mode);
 881         var->xres_virtual = disp->xres_virtual;
 882         var->yres_virtual = disp->yres_virtual;
 883         var->bits_per_pixel = disp->bits_per_pixel;
 884         var->grayscale = disp->grayscale;
 885         var->nonstd = disp->nonstd;
 886         var->accel_flags = disp->accel_flags;
 887         var->height = disp->height;
 888         var->width = disp->width;
 889         var->red = disp->red;
 890         var->green = disp->green;
 891         var->blue = disp->blue;
 892         var->transp = disp->transp;
 893         var->rotate = disp->rotate;
 894 }
 895
 896 static const char *fbcon_startup(void)
 897 {
 898         const char *display_desc = "frame buffer device";
 899         struct display *p = &fb_display[fg_console];
 900         struct vc_data *vc = vc_cons[fg_console].d;
 901         const struct font_desc *font = NULL;
 902         struct module *owner;
 903         struct fb_info *info = NULL;
 904         struct fbcon_ops *ops;
 905         int rows, cols;
 906         int irqres;
 907
 908         irqres = 1;
 909         /*
 910          *  If num_registered_fb is zero, this is a call for the dummy part.
 911          *  The frame buffer devices weren't initialized yet.
 912          */
 913         if (!num_registered_fb || info_idx == -1)
 914                 return display_desc;
 915         /*
 916          * Instead of blindly using registered_fb[0], we use info_idx, set by
 917          * fb_console_init();
 918          */
 919         info = registered_fb[info_idx];
 920         if (!info)
 921                 return NULL;
 922
 923         owner = info->fbops->owner;
 924         if (!try_module_get(owner))
 925                 return NULL;
 926         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 927                 module_put(owner);
 928                 return NULL;
 929         }
 930
 931         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 932         if (!ops) {
 933                 module_put(owner);
 934                 return NULL;
 935         }
 936
 937         ops->currcon = -1;
 938         ops->graphics = 1;
 939         ops->cur_rotate = -1;
 940         info->fbcon_par = ops;
 941         p->con_rotate = rotate;
 942         set_blitting_type(vc, info);
 943
 944         if (info->fix.type != FB_TYPE_TEXT) {
 945                 if (fbcon_softback_size) {
 946                         if (!softback_buf) {
 947                                 softback_buf =
 948                                     (unsigned long)
 949                                     kmalloc(fbcon_softback_size,
 950                                             GFP_KERNEL);
 951                                 if (!softback_buf) {
 952                                         fbcon_softback_size = 0;
 953                                         softback_top = 0;
 954                                 }
 955                         }
 956                 } else {
 957                         if (softback_buf) {
 958                                 kfree((void *) softback_buf);
 959                                 softback_buf = 0;
 960                                 softback_top = 0;
 961                         }
 962                 }
 963                 if (softback_buf)
 964                         softback_in = softback_top = softback_curr =
 965                             softback_buf;
 966                 softback_lines = 0;
 967         }
 968
 969         /* Setup default font */
 970         if (!p->fontdata) {
 971                 if (!fontname[0] || !(font = find_font(fontname)))
 972                         font = get_default_font(info->var.xres,
 973                                                 info->var.yres);
 974                 vc->vc_font.width = font->width;
 975                 vc->vc_font.height = font->height;
 976                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 977                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 978         }
 979
 980         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
 981         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
 982         cols /= vc->vc_font.width;
 983         rows /= vc->vc_font.height;
 984         vc_resize(vc, cols, rows);
 985
 986         DPRINTK("mode:   %s\n", info->fix.id);
 987         DPRINTK("visual: %d\n", info->fix.visual);
 988         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
 989                 info->var.yres,
 990                 info->var.bits_per_pixel);
 991
 992 #ifdef CONFIG_ATARI
 993         if (MACH_IS_ATARI) {
 994                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
 995                 irqres =
 996                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
 997                                 IRQ_TYPE_PRIO, "framebuffer vbl",
 998                                 info);
 999         }
1000 #endif                          /* CONFIG_ATARI */
1001
1002 #ifdef CONFIG_MAC
1003         /*
1004          * On a Macintoy, the VBL interrupt may or may not be active.
1005          * As interrupt based cursor is more reliable and race free, we
1006          * probe for VBL interrupts.
1007          */
1008         if (MACH_IS_MAC) {
1009                 int ct = 0;
1010                 /*
1011                  * Probe for VBL: set temp. handler ...
1012                  */
1013                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1014                                      "framebuffer vbl", info);
1015                 vbl_detected = 0;
1016
1017                 /*
1018                  * ... and spin for 20 ms ...
1019                  */
1020                 while (!vbl_detected && ++ct < 1000)
1021                         udelay(20);
1022
1023                 if (ct == 1000)
1024                         printk
1025                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1026
1027                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1028
1029                 if (vbl_detected) {
1030                         /*
1031                          * interrupt based cursor ok
1032                          */
1033                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1034                         irqres =
1035                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1036                                         "framebuffer vbl", info);
1037                 } else {
1038                         /*
1039                          * VBL not detected: fall through, use timer based cursor
1040                          */
1041                         irqres = 1;
1042                 }
1043         }
1044 #endif                          /* CONFIG_MAC */
1045
1046         fbcon_add_cursor_timer(info);
1047         fbcon_has_exited = 0;
1048         return display_desc;
1049 }
1050
1051 static void fbcon_init(struct vc_data *vc, int init)
1052 {
1053         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1054         struct fbcon_ops *ops;
1055         struct vc_data **default_mode = vc->vc_display_fg;
1056         struct vc_data *svc = *default_mode;
1057         struct display *t, *p = &fb_display[vc->vc_num];
1058         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1059         int cap;
1060
1061         if (info_idx == -1 || info == NULL)
1062             return;
1063
1064         cap = info->flags;
1065
1066         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1067             (info->fix.type == FB_TYPE_TEXT))
1068                 logo = 0;
1069
1070         if (var_to_display(p, &info->var, info))
1071                 return;
1072
1073         /* If we are not the first console on this
1074            fb, copy the font from that console */
1075         t = &fb_display[fg_console];
1076         if (!p->fontdata) {
1077                 if (t->fontdata) {
1078                         struct vc_data *fvc = vc_cons[fg_console].d;
1079
1080                         vc->vc_font.data = (void *)(p->fontdata =
1081                                                     fvc->vc_font.data);
1082                         vc->vc_font.width = fvc->vc_font.width;
1083                         vc->vc_font.height = fvc->vc_font.height;
1084                         p->userfont = t->userfont;
1085
1086                         if (p->userfont)
1087                                 REFCOUNT(p->fontdata)++;
1088                 } else {
1089                         const struct font_desc *font = NULL;
1090
1091                         if (!fontname[0] || !(font = find_font(fontname)))
1092                                 font = get_default_font(info->var.xres,
1093                                                         info->var.yres);
1094                         vc->vc_font.width = font->width;
1095                         vc->vc_font.height = font->height;
1096                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1097                         vc->vc_font.charcount = 256; /* FIXME  Need to
1098                                                         support more fonts */
1099                 }
1100         }
1101
1102         if (p->userfont)
1103                 charcnt = FNTCHARCNT(p->fontdata);
1104
1105         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1106         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1107         if (charcnt == 256) {
1108                 vc->vc_hi_font_mask = 0;
1109         } else {
1110                 vc->vc_hi_font_mask = 0x100;
1111                 if (vc->vc_can_do_color)
1112                         vc->vc_complement_mask <<= 1;
1113         }
1114
1115         if (!*svc->vc_uni_pagedir_loc)
1116                 con_set_default_unimap(svc);
1117         if (!*vc->vc_uni_pagedir_loc)
1118                 con_copy_unimap(vc, svc);
1119
1120         ops = info->fbcon_par;
1121         p->con_rotate = rotate;
1122         set_blitting_type(vc, info);
1123
1124         cols = vc->vc_cols;
1125         rows = vc->vc_rows;
1126         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1127         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1128         new_cols /= vc->vc_font.width;
1129         new_rows /= vc->vc_font.height;
1130         vc_resize(vc, new_cols, new_rows);
1131
1132         /*
1133          * We must always set the mode. The mode of the previous console
1134          * driver could be in the same resolution but we are using different
1135          * hardware so we have to initialize the hardware.
1136          *
1137          * We need to do it in fbcon_init() to prevent screen corruption.
1138          */
1139         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1140                 if (info->fbops->fb_set_par &&
1141                     !(ops->flags & FBCON_FLAGS_INIT))
1142                         info->fbops->fb_set_par(info);
1143                 ops->flags |= FBCON_FLAGS_INIT;
1144         }
1145
1146         ops->graphics = 0;
1147
1148         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1149             !(cap & FBINFO_HWACCEL_DISABLED))
1150                 p->scrollmode = SCROLL_MOVE;
1151         else /* default to something safe */
1152                 p->scrollmode = SCROLL_REDRAW;
1153
1154         /*
1155          *  ++guenther: console.c:vc_allocate() relies on initializing
1156          *  vc_{cols,rows}, but we must not set those if we are only
1157          *  resizing the console.
1158          */
1159         if (!init) {
1160                 vc->vc_cols = new_cols;
1161                 vc->vc_rows = new_rows;
1162         }
1163
1164         if (logo)
1165                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1166
1167         if (vc == svc && softback_buf)
1168                 fbcon_update_softback(vc);
1169
1170         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1171                 ops->rotate = FB_ROTATE_UR;
1172                 set_blitting_type(vc, info);
1173         }
1174
1175         ops->p = &fb_display[fg_console];
1176 }
1177
1178 static void fbcon_free_font(struct display *p)
1179 {
1180         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1181                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1182         p->fontdata = NULL;
1183         p->userfont = 0;
1184 }
1185
1186 static void fbcon_deinit(struct vc_data *vc)
1187 {
1188         struct display *p = &fb_display[vc->vc_num];
1189         struct fb_info *info;
1190         struct fbcon_ops *ops;
1191         int idx;
1192
1193         fbcon_free_font(p);
1194         idx = con2fb_map[vc->vc_num];
1195
1196         if (idx == -1)
1197                 goto finished;
1198
1199         info = registered_fb[idx];
1200
1201         if (!info)
1202                 goto finished;
1203
1204         ops = info->fbcon_par;
1205
1206         if (!ops)
1207                 goto finished;
1208
1209         if (CON_IS_VISIBLE(vc))
1210                 fbcon_del_cursor_timer(info);
1211
1212         ops->flags &= ~FBCON_FLAGS_INIT;
1213 finished:
1214
1215         if (!con_is_bound(&fb_con))
1216                 fbcon_exit();
1217
1218         return;
1219 }
1220
1221 /* ====================================================================== */
1222
1223 /*  fbcon_XXX routines - interface used by the world
1224  *
1225  *  This system is now divided into two levels because of complications
1226  *  caused by hardware scrolling. Top level functions:
1227  *
1228  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1229  *
1230  *  handles y values in range [0, scr_height-1] that correspond to real
1231  *  screen positions. y_wrap shift means that first line of bitmap may be
1232  *  anywhere on this display. These functions convert lineoffsets to
1233  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1234  *
1235  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1236  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1237  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1238  *
1239  *  WARNING:
1240  *
1241  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1242  *  Implies should only really hardware scroll in rows. Only reason for
1243  *  restriction is simplicity & efficiency at the moment.
1244  */
1245
1246 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1247                         int width)
1248 {
1249         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1250         struct fbcon_ops *ops = info->fbcon_par;
1251
1252         struct display *p = &fb_display[vc->vc_num];
1253         u_int y_break;
1254
1255         if (fbcon_is_inactive(vc, info))
1256                 return;
1257
1258         if (!height || !width)
1259                 return;
1260
1261         /* Split blits that cross physical y_wrap boundary */
1262
1263         y_break = p->vrows - p->yscroll;
1264         if (sy < y_break && sy + height - 1 >= y_break) {
1265                 u_int b = y_break - sy;
1266                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1267                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1268                                  width);
1269         } else
1270                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1271 }
1272
1273 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1274                         int count, int ypos, int xpos)
1275 {
1276         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1277         struct display *p = &fb_display[vc->vc_num];
1278         struct fbcon_ops *ops = info->fbcon_par;
1279
1280         if (!fbcon_is_inactive(vc, info))
1281                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1282                            get_color(vc, info, scr_readw(s), 1),
1283                            get_color(vc, info, scr_readw(s), 0));
1284 }
1285
1286 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1287 {
1288         unsigned short chr;
1289
1290         scr_writew(c, &chr);
1291         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1292 }
1293
1294 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1295 {
1296         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1297         struct fbcon_ops *ops = info->fbcon_par;
1298
1299         if (!fbcon_is_inactive(vc, info))
1300                 ops->clear_margins(vc, info, bottom_only);
1301 }
1302
1303 static void fbcon_cursor(struct vc_data *vc, int mode)
1304 {
1305         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1306         struct fbcon_ops *ops = info->fbcon_par;
1307         int y;
1308         int c = scr_readw((u16 *) vc->vc_pos);
1309
1310         if (fbcon_is_inactive(vc, info))
1311                 return;
1312
1313         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1314         if (mode & CM_SOFTBACK) {
1315                 mode &= ~CM_SOFTBACK;
1316                 y = softback_lines;
1317         } else {
1318                 if (softback_lines)
1319                         fbcon_set_origin(vc);
1320                 y = 0;
1321         }
1322
1323         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1324                     get_color(vc, info, c, 0));
1325         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1326 }
1327
1328 static int scrollback_phys_max = 0;
1329 static int scrollback_max = 0;
1330 static int scrollback_current = 0;
1331
1332 /*
1333  * If no vc is existent yet, just set struct display
1334  */
1335 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1336                               int unit)
1337 {
1338         struct display *p = &fb_display[unit];
1339         struct display *t = &fb_display[fg_console];
1340
1341         if (var_to_display(p, var, info))
1342                 return;
1343
1344         p->fontdata = t->fontdata;
1345         p->userfont = t->userfont;
1346         if (p->userfont)
1347                 REFCOUNT(p->fontdata)++;
1348 }
1349
1350 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1351                            struct vc_data *vc)
1352 {
1353         struct display *p = &fb_display[vc->vc_num], *t;
1354         struct vc_data **default_mode = vc->vc_display_fg;
1355         struct vc_data *svc = *default_mode;
1356         struct fbcon_ops *ops = info->fbcon_par;
1357         int rows, cols, charcnt = 256;
1358
1359         if (var_to_display(p, var, info))
1360                 return;
1361         t = &fb_display[svc->vc_num];
1362         if (!vc->vc_font.data) {
1363                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1364                 vc->vc_font.width = (*default_mode)->vc_font.width;
1365                 vc->vc_font.height = (*default_mode)->vc_font.height;
1366                 p->userfont = t->userfont;
1367                 if (p->userfont)
1368                         REFCOUNT(p->fontdata)++;
1369         }
1370         if (p->userfont)
1371                 charcnt = FNTCHARCNT(p->fontdata);
1372
1373         var->activate = FB_ACTIVATE_NOW;
1374         info->var.activate = var->activate;
1375         var->yoffset = info->var.yoffset;
1376         var->xoffset = info->var.xoffset;
1377         fb_set_var(info, var);
1378         ops->var = info->var;
1379         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1380         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1381         if (charcnt == 256) {
1382                 vc->vc_hi_font_mask = 0;
1383         } else {
1384                 vc->vc_hi_font_mask = 0x100;
1385                 if (vc->vc_can_do_color)
1386                         vc->vc_complement_mask <<= 1;
1387         }
1388
1389         if (!*svc->vc_uni_pagedir_loc)
1390                 con_set_default_unimap(svc);
1391         if (!*vc->vc_uni_pagedir_loc)
1392                 con_copy_unimap(vc, svc);
1393
1394         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1395         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1396         cols /= vc->vc_font.width;
1397         rows /= vc->vc_font.height;
1398         vc_resize(vc, cols, rows);
1399
1400         if (CON_IS_VISIBLE(vc)) {
1401                 update_screen(vc);
1402                 if (softback_buf)
1403                         fbcon_update_softback(vc);
1404         }
1405 }
1406
1407 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1408 {
1409         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1410         struct fbcon_ops *ops = info->fbcon_par;
1411         struct display *p = &fb_display[vc->vc_num];
1412
1413         p->yscroll += count;
1414         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1415                 p->yscroll -= p->vrows;
1416         ops->var.xoffset = 0;
1417         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1418         ops->var.vmode |= FB_VMODE_YWRAP;
1419         ops->update_start(info);
1420         scrollback_max += count;
1421         if (scrollback_max > scrollback_phys_max)
1422                 scrollback_max = scrollback_phys_max;
1423         scrollback_current = 0;
1424 }
1425
1426 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1427 {
1428         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1429         struct fbcon_ops *ops = info->fbcon_par;
1430         struct display *p = &fb_display[vc->vc_num];
1431
1432         p->yscroll -= count;
1433         if (p->yscroll < 0)     /* Deal with wrap */
1434                 p->yscroll += p->vrows;
1435         ops->var.xoffset = 0;
1436         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1437         ops->var.vmode |= FB_VMODE_YWRAP;
1438         ops->update_start(info);
1439         scrollback_max -= count;
1440         if (scrollback_max < 0)
1441                 scrollback_max = 0;
1442         scrollback_current = 0;
1443 }
1444
1445 static __inline__ void ypan_up(struct vc_data *vc, int count)
1446 {
1447         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1448         struct display *p = &fb_display[vc->vc_num];
1449         struct fbcon_ops *ops = info->fbcon_par;
1450
1451         p->yscroll += count;
1452         if (p->yscroll > p->vrows - vc->vc_rows) {
1453                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1454                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1455                 p->yscroll -= p->vrows - vc->vc_rows;
1456         }
1457
1458         ops->var.xoffset = 0;
1459         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1460         ops->var.vmode &= ~FB_VMODE_YWRAP;
1461         ops->update_start(info);
1462         fbcon_clear_margins(vc, 1);
1463         scrollback_max += count;
1464         if (scrollback_max > scrollback_phys_max)
1465                 scrollback_max = scrollback_phys_max;
1466         scrollback_current = 0;
1467 }
1468
1469 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1470 {
1471         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1472         struct fbcon_ops *ops = info->fbcon_par;
1473         struct display *p = &fb_display[vc->vc_num];
1474
1475         p->yscroll += count;
1476
1477         if (p->yscroll > p->vrows - vc->vc_rows) {
1478                 p->yscroll -= p->vrows - vc->vc_rows;
1479                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1480         }
1481
1482         ops->var.xoffset = 0;
1483         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1484         ops->var.vmode &= ~FB_VMODE_YWRAP;
1485         ops->update_start(info);
1486         fbcon_clear_margins(vc, 1);
1487         scrollback_max += count;
1488         if (scrollback_max > scrollback_phys_max)
1489                 scrollback_max = scrollback_phys_max;
1490         scrollback_current = 0;
1491 }
1492
1493 static __inline__ void ypan_down(struct vc_data *vc, int count)
1494 {
1495         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1496         struct display *p = &fb_display[vc->vc_num];
1497         struct fbcon_ops *ops = info->fbcon_par;
1498
1499         p->yscroll -= count;
1500         if (p->yscroll < 0) {
1501                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1502                             0, vc->vc_rows, vc->vc_cols);
1503                 p->yscroll += p->vrows - vc->vc_rows;
1504         }
1505
1506         ops->var.xoffset = 0;
1507         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1508         ops->var.vmode &= ~FB_VMODE_YWRAP;
1509         ops->update_start(info);
1510         fbcon_clear_margins(vc, 1);
1511         scrollback_max -= count;
1512         if (scrollback_max < 0)
1513                 scrollback_max = 0;
1514         scrollback_current = 0;
1515 }
1516
1517 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1518 {
1519         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1520         struct fbcon_ops *ops = info->fbcon_par;
1521         struct display *p = &fb_display[vc->vc_num];
1522
1523         p->yscroll -= count;
1524
1525         if (p->yscroll < 0) {
1526                 p->yscroll += p->vrows - vc->vc_rows;
1527                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1528         }
1529
1530         ops->var.xoffset = 0;
1531         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1532         ops->var.vmode &= ~FB_VMODE_YWRAP;
1533         ops->update_start(info);
1534         fbcon_clear_margins(vc, 1);
1535         scrollback_max -= count;
1536         if (scrollback_max < 0)
1537                 scrollback_max = 0;
1538         scrollback_current = 0;
1539 }
1540
1541 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1542                                   long delta)
1543 {
1544         int count = vc->vc_rows;
1545         unsigned short *d, *s;
1546         unsigned long n;
1547         int line = 0;
1548
1549         d = (u16 *) softback_curr;
1550         if (d == (u16 *) softback_in)
1551                 d = (u16 *) vc->vc_origin;
1552         n = softback_curr + delta * vc->vc_size_row;
1553         softback_lines -= delta;
1554         if (delta < 0) {
1555                 if (softback_curr < softback_top && n < softback_buf) {
1556                         n += softback_end - softback_buf;
1557                         if (n < softback_top) {
1558                                 softback_lines -=
1559                                     (softback_top - n) / vc->vc_size_row;
1560                                 n = softback_top;
1561                         }
1562                 } else if (softback_curr >= softback_top
1563                            && n < softback_top) {
1564                         softback_lines -=
1565                             (softback_top - n) / vc->vc_size_row;
1566                         n = softback_top;
1567                 }
1568         } else {
1569                 if (softback_curr > softback_in && n >= softback_end) {
1570                         n += softback_buf - softback_end;
1571                         if (n > softback_in) {
1572                                 n = softback_in;
1573                                 softback_lines = 0;
1574                         }
1575                 } else if (softback_curr <= softback_in && n > softback_in) {
1576                         n = softback_in;
1577                         softback_lines = 0;
1578                 }
1579         }
1580         if (n == softback_curr)
1581                 return;
1582         softback_curr = n;
1583         s = (u16 *) softback_curr;
1584         if (s == (u16 *) softback_in)
1585                 s = (u16 *) vc->vc_origin;
1586         while (count--) {
1587                 unsigned short *start;
1588                 unsigned short *le;
1589                 unsigned short c;
1590                 int x = 0;
1591                 unsigned short attr = 1;
1592
1593                 start = s;
1594                 le = advance_row(s, 1);
1595                 do {
1596                         c = scr_readw(s);
1597                         if (attr != (c & 0xff00)) {
1598                                 attr = c & 0xff00;
1599                                 if (s > start) {
1600                                         fbcon_putcs(vc, start, s - start,
1601                                                     line, x);
1602                                         x += s - start;
1603                                         start = s;
1604                                 }
1605                         }
1606                         if (c == scr_readw(d)) {
1607                                 if (s > start) {
1608                                         fbcon_putcs(vc, start, s - start,
1609                                                     line, x);
1610                                         x += s - start + 1;
1611                                         start = s + 1;
1612                                 } else {
1613                                         x++;
1614                                         start++;
1615                                 }
1616                         }
1617                         s++;
1618                         d++;
1619                 } while (s < le);
1620                 if (s > start)
1621                         fbcon_putcs(vc, start, s - start, line, x);
1622                 line++;
1623                 if (d == (u16 *) softback_end)
1624                         d = (u16 *) softback_buf;
1625                 if (d == (u16 *) softback_in)
1626                         d = (u16 *) vc->vc_origin;
1627                 if (s == (u16 *) softback_end)
1628                         s = (u16 *) softback_buf;
1629                 if (s == (u16 *) softback_in)
1630                         s = (u16 *) vc->vc_origin;
1631         }
1632 }
1633
1634 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1635                               int line, int count, int dy)
1636 {
1637         unsigned short *s = (unsigned short *)
1638                 (vc->vc_origin + vc->vc_size_row * line);
1639
1640         while (count--) {
1641                 unsigned short *start = s;
1642                 unsigned short *le = advance_row(s, 1);
1643                 unsigned short c;
1644                 int x = 0;
1645                 unsigned short attr = 1;
1646
1647                 do {
1648                         c = scr_readw(s);
1649                         if (attr != (c & 0xff00)) {
1650                                 attr = c & 0xff00;
1651                                 if (s > start) {
1652                                         fbcon_putcs(vc, start, s - start,
1653                                                     dy, x);
1654                                         x += s - start;
1655                                         start = s;
1656                                 }
1657                         }
1658                         console_conditional_schedule();
1659                         s++;
1660                 } while (s < le);
1661                 if (s > start)
1662                         fbcon_putcs(vc, start, s - start, dy, x);
1663                 console_conditional_schedule();
1664                 dy++;
1665         }
1666 }
1667
1668 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1669                          int line, int count, int offset)
1670 {
1671         unsigned short *d = (unsigned short *)
1672             (vc->vc_origin + vc->vc_size_row * line);
1673         unsigned short *s = d + offset;
1674
1675         while (count--) {
1676                 unsigned short *start = s;
1677                 unsigned short *le = advance_row(s, 1);
1678                 unsigned short c;
1679                 int x = 0;
1680                 unsigned short attr = 1;
1681
1682                 do {
1683                         c = scr_readw(s);
1684                         if (attr != (c & 0xff00)) {
1685                                 attr = c & 0xff00;
1686                                 if (s > start) {
1687                                         fbcon_putcs(vc, start, s - start,
1688                                                     line, x);
1689                                         x += s - start;
1690                                         start = s;
1691                                 }
1692                         }
1693                         if (c == scr_readw(d)) {
1694                                 if (s > start) {
1695                                         fbcon_putcs(vc, start, s - start,
1696                                                      line, x);
1697                                         x += s - start + 1;
1698                                         start = s + 1;
1699                                 } else {
1700                                         x++;
1701                                         start++;
1702                                 }
1703                         }
1704                         scr_writew(c, d);
1705                         console_conditional_schedule();
1706                         s++;
1707                         d++;
1708                 } while (s < le);
1709                 if (s > start)
1710                         fbcon_putcs(vc, start, s - start, line, x);
1711                 console_conditional_schedule();
1712                 if (offset > 0)
1713                         line++;
1714                 else {
1715                         line--;
1716                         /* NOTE: We subtract two lines from these pointers */
1717                         s -= vc->vc_size_row;
1718                         d -= vc->vc_size_row;
1719                 }
1720         }
1721 }
1722
1723 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1724                                        int count)
1725 {
1726         unsigned short *p;
1727
1728         if (vc->vc_num != fg_console)
1729                 return;
1730         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1731
1732         while (count) {
1733                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1734                 count--;
1735                 p = advance_row(p, 1);
1736                 softback_in += vc->vc_size_row;
1737                 if (softback_in == softback_end)
1738                         softback_in = softback_buf;
1739                 if (softback_in == softback_top) {
1740                         softback_top += vc->vc_size_row;
1741                         if (softback_top == softback_end)
1742                                 softback_top = softback_buf;
1743                 }
1744         }
1745         softback_curr = softback_in;
1746 }
1747
1748 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1749                         int count)
1750 {
1751         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1752         struct display *p = &fb_display[vc->vc_num];
1753         struct fbcon_ops *ops = info->fbcon_par;
1754         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1755
1756         if (fbcon_is_inactive(vc, info))
1757                 return -EINVAL;
1758
1759         fbcon_cursor(vc, CM_ERASE);
1760
1761         /*
1762          * ++Geert: Only use ywrap/ypan if the console is in text mode
1763          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1764          *           whole screen (prevents flicker).
1765          */
1766
1767         switch (dir) {
1768         case SM_UP:
1769                 if (count > vc->vc_rows)        /* Maximum realistic size */
1770                         count = vc->vc_rows;
1771                 if (softback_top)
1772                         fbcon_softback_note(vc, t, count);
1773                 if (logo_shown >= 0)
1774                         goto redraw_up;
1775                 switch (p->scrollmode) {
1776                 case SCROLL_MOVE:
1777                         ops->bmove(vc, info, t + count, 0, t, 0,
1778                                     b - t - count, vc->vc_cols);
1779                         ops->clear(vc, info, b - count, 0, count,
1780                                   vc->vc_cols);
1781                         break;
1782
1783                 case SCROLL_WRAP_MOVE:
1784                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1785                                 if (t > 0)
1786                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1787                                                     vc->vc_cols);
1788                                 ywrap_up(vc, count);
1789                                 if (vc->vc_rows - b > 0)
1790                                         fbcon_bmove(vc, b - count, 0, b, 0,
1791                                                     vc->vc_rows - b,
1792                                                     vc->vc_cols);
1793                         } else if (info->flags & FBINFO_READS_FAST)
1794                                 fbcon_bmove(vc, t + count, 0, t, 0,
1795                                             b - t - count, vc->vc_cols);
1796                         else
1797                                 goto redraw_up;
1798                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1799                         break;
1800
1801                 case SCROLL_PAN_REDRAW:
1802                         if ((p->yscroll + count <=
1803                              2 * (p->vrows - vc->vc_rows))
1804                             && ((!scroll_partial && (b - t == vc->vc_rows))
1805                                 || (scroll_partial
1806                                     && (b - t - count >
1807                                         3 * vc->vc_rows >> 2)))) {
1808                                 if (t > 0)
1809                                         fbcon_redraw_move(vc, p, 0, t, count);
1810                                 ypan_up_redraw(vc, t, count);
1811                                 if (vc->vc_rows - b > 0)
1812                                         fbcon_redraw_move(vc, p, b,
1813                                                           vc->vc_rows - b, b);
1814                         } else
1815                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1816                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1817                         break;
1818
1819                 case SCROLL_PAN_MOVE:
1820                         if ((p->yscroll + count <=
1821                              2 * (p->vrows - vc->vc_rows))
1822                             && ((!scroll_partial && (b - t == vc->vc_rows))
1823                                 || (scroll_partial
1824                                     && (b - t - count >
1825                                         3 * vc->vc_rows >> 2)))) {
1826                                 if (t > 0)
1827                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1828                                                     vc->vc_cols);
1829                                 ypan_up(vc, count);
1830                                 if (vc->vc_rows - b > 0)
1831                                         fbcon_bmove(vc, b - count, 0, b, 0,
1832                                                     vc->vc_rows - b,
1833                                                     vc->vc_cols);
1834                         } else if (info->flags & FBINFO_READS_FAST)
1835                                 fbcon_bmove(vc, t + count, 0, t, 0,
1836                                             b - t - count, vc->vc_cols);
1837                         else
1838                                 goto redraw_up;
1839                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1840                         break;
1841
1842                 case SCROLL_REDRAW:
1843                       redraw_up:
1844                         fbcon_redraw(vc, p, t, b - t - count,
1845                                      count * vc->vc_cols);
1846                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1847                         scr_memsetw((unsigned short *) (vc->vc_origin +
1848                                                         vc->vc_size_row *
1849                                                         (b - count)),
1850                                     vc->vc_video_erase_char,
1851                                     vc->vc_size_row * count);
1852                         return 1;
1853                 }
1854                 break;
1855
1856         case SM_DOWN:
1857                 if (count > vc->vc_rows)        /* Maximum realistic size */
1858                         count = vc->vc_rows;
1859                 if (logo_shown >= 0)
1860                         goto redraw_down;
1861                 switch (p->scrollmode) {
1862                 case SCROLL_MOVE:
1863                         ops->bmove(vc, info, t, 0, t + count, 0,
1864                                     b - t - count, vc->vc_cols);
1865                         ops->clear(vc, info, t, 0, count, vc->vc_cols);
1866                         break;
1867
1868                 case SCROLL_WRAP_MOVE:
1869                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1870                                 if (vc->vc_rows - b > 0)
1871                                         fbcon_bmove(vc, b, 0, b - count, 0,
1872                                                     vc->vc_rows - b,
1873                                                     vc->vc_cols);
1874                                 ywrap_down(vc, count);
1875                                 if (t > 0)
1876                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1877                                                     vc->vc_cols);
1878                         } else if (info->flags & FBINFO_READS_FAST)
1879                                 fbcon_bmove(vc, t, 0, t + count, 0,
1880                                             b - t - count, vc->vc_cols);
1881                         else
1882                                 goto redraw_down;
1883                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1884                         break;
1885
1886                 case SCROLL_PAN_MOVE:
1887                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1888                             && ((!scroll_partial && (b - t == vc->vc_rows))
1889                                 || (scroll_partial
1890                                     && (b - t - count >
1891                                         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                                 ypan_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_REDRAW:
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_redraw_move(vc, p, b, vc->vc_rows - b,
1916                                                           b - count);
1917                                 ypan_down_redraw(vc, t, count);
1918                                 if (t > 0)
1919                                         fbcon_redraw_move(vc, p, count, t, 0);
1920                         } else
1921                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1922                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1923                         break;
1924
1925                 case SCROLL_REDRAW:
1926                       redraw_down:
1927                         fbcon_redraw(vc, p, b - 1, b - t - count,
1928                                      -count * vc->vc_cols);
1929                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1930                         scr_memsetw((unsigned short *) (vc->vc_origin +
1931                                                         vc->vc_size_row *
1932                                                         t),
1933                                     vc->vc_video_erase_char,
1934                                     vc->vc_size_row * count);
1935                         return 1;
1936                 }
1937         }
1938         return 0;
1939 }
1940
1941
1942 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1943                         int height, int width)
1944 {
1945         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1946         struct display *p = &fb_display[vc->vc_num];
1947
1948         if (fbcon_is_inactive(vc, info))
1949                 return;
1950
1951         if (!width || !height)
1952                 return;
1953
1954         /*  Split blits that cross physical y_wrap case.
1955          *  Pathological case involves 4 blits, better to use recursive
1956          *  code rather than unrolled case
1957          *
1958          *  Recursive invocations don't need to erase the cursor over and
1959          *  over again, so we use fbcon_bmove_rec()
1960          */
1961         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1962                         p->vrows - p->yscroll);
1963 }
1964
1965 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1966                             int dy, int dx, int height, int width, u_int y_break)
1967 {
1968         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1969         struct fbcon_ops *ops = info->fbcon_par;
1970         u_int b;
1971
1972         if (sy < y_break && sy + height > y_break) {
1973                 b = y_break - sy;
1974                 if (dy < sy) {  /* Avoid trashing self */
1975                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1976                                         y_break);
1977                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1978                                         height - b, width, y_break);
1979                 } else {
1980                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1981                                         height - b, width, y_break);
1982                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1983                                         y_break);
1984                 }
1985                 return;
1986         }
1987
1988         if (dy < y_break && dy + height > y_break) {
1989                 b = y_break - dy;
1990                 if (dy < sy) {  /* Avoid trashing self */
1991                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1992                                         y_break);
1993                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1994                                         height - b, width, y_break);
1995                 } else {
1996                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1997                                         height - b, width, y_break);
1998                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1999                                         y_break);
2000                 }
2001                 return;
2002         }
2003         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2004                    height, width);
2005 }
2006
2007 static __inline__ void updatescrollmode(struct display *p,
2008                                         struct fb_info *info,
2009                                         struct vc_data *vc)
2010 {
2011         struct fbcon_ops *ops = info->fbcon_par;
2012         int fh = vc->vc_font.height;
2013         int cap = info->flags;
2014         u16 t = 0;
2015         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2016                                   info->fix.xpanstep);
2017         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2018         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2019         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2020                                    info->var.xres_virtual);
2021         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2022                 divides(ypan, vc->vc_font.height) && vyres > yres;
2023         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2024                 divides(ywrap, vc->vc_font.height) &&
2025                 divides(vc->vc_font.height, vyres) &&
2026                 divides(vc->vc_font.height, yres);
2027         int reading_fast = cap & FBINFO_READS_FAST;
2028         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2029                 !(cap & FBINFO_HWACCEL_DISABLED);
2030         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2031                 !(cap & FBINFO_HWACCEL_DISABLED);
2032
2033         p->vrows = vyres/fh;
2034         if (yres > (fh * (vc->vc_rows + 1)))
2035                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2036         if ((yres % fh) && (vyres % fh < yres % fh))
2037                 p->vrows--;
2038
2039         if (good_wrap || good_pan) {
2040                 if (reading_fast || fast_copyarea)
2041                         p->scrollmode = good_wrap ?
2042                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2043                 else
2044                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2045                                 SCROLL_PAN_REDRAW;
2046         } else {
2047                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2048                         p->scrollmode = SCROLL_MOVE;
2049                 else
2050                         p->scrollmode = SCROLL_REDRAW;
2051         }
2052 }
2053
2054 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2055                         unsigned int height)
2056 {
2057         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2058         struct fbcon_ops *ops = info->fbcon_par;
2059         struct display *p = &fb_display[vc->vc_num];
2060         struct fb_var_screeninfo var = info->var;
2061         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2062
2063         virt_w = FBCON_SWAP(ops->rotate, width, height);
2064         virt_h = FBCON_SWAP(ops->rotate, height, width);
2065         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2066                                  vc->vc_font.height);
2067         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2068                                  vc->vc_font.width);
2069         var.xres = virt_w * virt_fw;
2070         var.yres = virt_h * virt_fh;
2071         x_diff = info->var.xres - var.xres;
2072         y_diff = info->var.yres - var.yres;
2073         if (x_diff < 0 || x_diff > virt_fw ||
2074             y_diff < 0 || y_diff > virt_fh) {
2075                 struct fb_videomode *mode;
2076
2077                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2078                 mode = fb_find_best_mode(&var, &info->modelist);
2079                 if (mode == NULL)
2080                         return -EINVAL;
2081                 display_to_var(&var, p);
2082                 fb_videomode_to_var(&var, mode);
2083
2084                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2085                         return -EINVAL;
2086
2087                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2088                 if (CON_IS_VISIBLE(vc)) {
2089                         var.activate = FB_ACTIVATE_NOW |
2090                                 FB_ACTIVATE_FORCE;
2091                         fb_set_var(info, &var);
2092                 }
2093                 var_to_display(p, &info->var, info);
2094                 ops->var = info->var;
2095         }
2096         updatescrollmode(p, info, vc);
2097         return 0;
2098 }
2099
2100 static int fbcon_switch(struct vc_data *vc)
2101 {
2102         struct fb_info *info, *old_info = NULL;
2103         struct fbcon_ops *ops;
2104         struct display *p = &fb_display[vc->vc_num];
2105         struct fb_var_screeninfo var;
2106         int i, prev_console, charcnt = 256;
2107
2108         info = registered_fb[con2fb_map[vc->vc_num]];
2109         ops = info->fbcon_par;
2110
2111         if (softback_top) {
2112                 if (softback_lines)
2113                         fbcon_set_origin(vc);
2114                 softback_top = softback_curr = softback_in = softback_buf;
2115                 softback_lines = 0;
2116                 fbcon_update_softback(vc);
2117         }
2118
2119         if (logo_shown >= 0) {
2120                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2121
2122                 if (conp2->vc_top == logo_lines
2123                     && conp2->vc_bottom == conp2->vc_rows)
2124                         conp2->vc_top = 0;
2125                 logo_shown = FBCON_LOGO_CANSHOW;
2126         }
2127
2128         prev_console = ops->currcon;
2129         if (prev_console != -1)
2130                 old_info = registered_fb[con2fb_map[prev_console]];
2131         /*
2132          * FIXME: If we have multiple fbdev's loaded, we need to
2133          * update all info->currcon.  Perhaps, we can place this
2134          * in a centralized structure, but this might break some
2135          * drivers.
2136          *
2137          * info->currcon = vc->vc_num;
2138          */
2139         for (i = 0; i < FB_MAX; i++) {
2140                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2141                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2142
2143                         o->currcon = vc->vc_num;
2144                 }
2145         }
2146         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2147         display_to_var(&var, p);
2148         var.activate = FB_ACTIVATE_NOW;
2149
2150         /*
2151          * make sure we don't unnecessarily trip the memcmp()
2152          * in fb_set_var()
2153          */
2154         info->var.activate = var.activate;
2155         var.yoffset = info->var.yoffset;
2156         var.xoffset = info->var.xoffset;
2157         var.vmode = info->var.vmode;
2158         fb_set_var(info, &var);
2159         ops->var = info->var;
2160
2161         if (old_info != NULL && (old_info != info ||
2162                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2163                 if (info->fbops->fb_set_par)
2164                         info->fbops->fb_set_par(info);
2165
2166                 if (old_info != info)
2167                         fbcon_del_cursor_timer(old_info);
2168         }
2169
2170         fbcon_add_cursor_timer(info);
2171         set_blitting_type(vc, info);
2172         ops->cursor_reset = 1;
2173
2174         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2175                 ops->rotate = FB_ROTATE_UR;
2176                 set_blitting_type(vc, info);
2177         }
2178
2179         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2180         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2181
2182         if (p->userfont)
2183                 charcnt = FNTCHARCNT(vc->vc_font.data);
2184
2185         if (charcnt > 256)
2186                 vc->vc_complement_mask <<= 1;
2187
2188         updatescrollmode(p, info, vc);
2189
2190         switch (p->scrollmode) {
2191         case SCROLL_WRAP_MOVE:
2192                 scrollback_phys_max = p->vrows - vc->vc_rows;
2193                 break;
2194         case SCROLL_PAN_MOVE:
2195         case SCROLL_PAN_REDRAW:
2196                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2197                 if (scrollback_phys_max < 0)
2198                         scrollback_phys_max = 0;
2199                 break;
2200         default:
2201                 scrollback_phys_max = 0;
2202                 break;
2203         }
2204
2205         scrollback_max = 0;
2206         scrollback_current = 0;
2207
2208         if (!fbcon_is_inactive(vc, info)) {
2209             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2210             ops->update_start(info);
2211         }
2212
2213         fbcon_set_palette(vc, color_table);
2214         fbcon_clear_margins(vc, 0);
2215
2216         if (logo_shown == FBCON_LOGO_DRAW) {
2217
2218                 logo_shown = fg_console;
2219                 /* This is protected above by initmem_freed */
2220                 fb_show_logo(info, ops->rotate);
2221                 update_region(vc,
2222                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2223                               vc->vc_size_row * (vc->vc_bottom -
2224                                                  vc->vc_top) / 2);
2225                 return 0;
2226         }
2227         return 1;
2228 }
2229
2230 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2231                                 int blank)
2232 {
2233         if (blank) {
2234                 unsigned short charmask = vc->vc_hi_font_mask ?
2235                         0x1ff : 0xff;
2236                 unsigned short oldc;
2237
2238                 oldc = vc->vc_video_erase_char;
2239                 vc->vc_video_erase_char &= charmask;
2240                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2241                 vc->vc_video_erase_char = oldc;
2242         }
2243 }
2244
2245 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2246 {
2247         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2248         struct fbcon_ops *ops = info->fbcon_par;
2249
2250         if (mode_switch) {
2251                 struct fb_var_screeninfo var = info->var;
2252
2253                 ops->graphics = 1;
2254
2255                 if (!blank) {
2256                         if (info->fbops->fb_save_state)
2257                                 info->fbops->fb_save_state(info);
2258                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2259                         fb_set_var(info, &var);
2260                         ops->graphics = 0;
2261                         ops->var = info->var;
2262                 } else if (info->fbops->fb_restore_state)
2263                         info->fbops->fb_restore_state(info);
2264         }
2265
2266         if (!fbcon_is_inactive(vc, info)) {
2267                 if (ops->blank_state != blank) {
2268                         ops->blank_state = blank;
2269                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2270                         ops->cursor_flash = (!blank);
2271
2272                         if (fb_blank(info, blank))
2273                                 fbcon_generic_blank(vc, info, blank);
2274                 }
2275
2276                 if (!blank)
2277                         update_screen(vc);
2278         }
2279
2280         if (!blank)
2281                 fbcon_add_cursor_timer(info);
2282         else
2283                 fbcon_del_cursor_timer(info);
2284
2285         return 0;
2286 }
2287
2288 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2289 {
2290         u8 *fontdata = vc->vc_font.data;
2291         u8 *data = font->data;
2292         int i, j;
2293
2294         font->width = vc->vc_font.width;
2295         font->height = vc->vc_font.height;
2296         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2297         if (!font->data)
2298                 return 0;
2299
2300         if (font->width <= 8) {
2301                 j = vc->vc_font.height;
2302                 for (i = 0; i < font->charcount; i++) {
2303                         memcpy(data, fontdata, j);
2304                         memset(data + j, 0, 32 - j);
2305                         data += 32;
2306                         fontdata += j;
2307                 }
2308         } else if (font->width <= 16) {
2309                 j = vc->vc_font.height * 2;
2310                 for (i = 0; i < font->charcount; i++) {
2311                         memcpy(data, fontdata, j);
2312                         memset(data + j, 0, 64 - j);
2313                         data += 64;
2314                         fontdata += j;
2315                 }
2316         } else if (font->width <= 24) {
2317                 for (i = 0; i < font->charcount; i++) {
2318                         for (j = 0; j < vc->vc_font.height; j++) {
2319                                 *data++ = fontdata[0];
2320                                 *data++ = fontdata[1];
2321                                 *data++ = fontdata[2];
2322                                 fontdata += sizeof(u32);
2323                         }
2324                         memset(data, 0, 3 * (32 - j));
2325                         data += 3 * (32 - j);
2326                 }
2327         } else {
2328                 j = vc->vc_font.height * 4;
2329                 for (i = 0; i < font->charcount; i++) {
2330                         memcpy(data, fontdata, j);
2331                         memset(data + j, 0, 128 - j);
2332                         data += 128;
2333                         fontdata += j;
2334                 }
2335         }
2336         return 0;
2337 }
2338
2339 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2340                              const u8 * data, int userfont)
2341 {
2342         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2343         struct fbcon_ops *ops = info->fbcon_par;
2344         struct display *p = &fb_display[vc->vc_num];
2345         int resize;
2346         int cnt;
2347         char *old_data = NULL;
2348
2349         if (CON_IS_VISIBLE(vc) && softback_lines)
2350                 fbcon_set_origin(vc);
2351
2352         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2353         if (p->userfont)
2354                 old_data = vc->vc_font.data;
2355         if (userfont)
2356                 cnt = FNTCHARCNT(data);
2357         else
2358                 cnt = 256;
2359         vc->vc_font.data = (void *)(p->fontdata = data);
2360         if ((p->userfont = userfont))
2361                 REFCOUNT(data)++;
2362         vc->vc_font.width = w;
2363         vc->vc_font.height = h;
2364         if (vc->vc_hi_font_mask && cnt == 256) {
2365                 vc->vc_hi_font_mask = 0;
2366                 if (vc->vc_can_do_color) {
2367                         vc->vc_complement_mask >>= 1;
2368                         vc->vc_s_complement_mask >>= 1;
2369                 }
2370
2371                 /* ++Edmund: reorder the attribute bits */
2372                 if (vc->vc_can_do_color) {
2373                         unsigned short *cp =
2374                             (unsigned short *) vc->vc_origin;
2375                         int count = vc->vc_screenbuf_size / 2;
2376                         unsigned short c;
2377                         for (; count > 0; count--, cp++) {
2378                                 c = scr_readw(cp);
2379                                 scr_writew(((c & 0xfe00) >> 1) |
2380                                            (c & 0xff), cp);
2381                         }
2382                         c = vc->vc_video_erase_char;
2383                         vc->vc_video_erase_char =
2384                             ((c & 0xfe00) >> 1) | (c & 0xff);
2385                         vc->vc_attr >>= 1;
2386                 }
2387         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2388                 vc->vc_hi_font_mask = 0x100;
2389                 if (vc->vc_can_do_color) {
2390                         vc->vc_complement_mask <<= 1;
2391                         vc->vc_s_complement_mask <<= 1;
2392                 }
2393
2394                 /* ++Edmund: reorder the attribute bits */
2395                 {
2396                         unsigned short *cp =
2397                             (unsigned short *) vc->vc_origin;
2398                         int count = vc->vc_screenbuf_size / 2;
2399                         unsigned short c;
2400                         for (; count > 0; count--, cp++) {
2401                                 unsigned short newc;
2402                                 c = scr_readw(cp);
2403                                 if (vc->vc_can_do_color)
2404                                         newc =
2405                                             ((c & 0xff00) << 1) | (c &
2406                                                                    0xff);
2407                                 else
2408                                         newc = c & ~0x100;
2409                                 scr_writew(newc, cp);
2410                         }
2411                         c = vc->vc_video_erase_char;
2412                         if (vc->vc_can_do_color) {
2413                                 vc->vc_video_erase_char =
2414                                     ((c & 0xff00) << 1) | (c & 0xff);
2415                                 vc->vc_attr <<= 1;
2416                         } else
2417                                 vc->vc_video_erase_char = c & ~0x100;
2418                 }
2419
2420         }
2421
2422         if (resize) {
2423                 int cols, rows;
2424
2425                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2426                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2427                 cols /= w;
2428                 rows /= h;
2429                 vc_resize(vc, cols, rows);
2430                 if (CON_IS_VISIBLE(vc) && softback_buf)
2431                         fbcon_update_softback(vc);
2432         } else if (CON_IS_VISIBLE(vc)
2433                    && vc->vc_mode == KD_TEXT) {
2434                 fbcon_clear_margins(vc, 0);
2435                 update_screen(vc);
2436         }
2437
2438         if (old_data && (--REFCOUNT(old_data) == 0))
2439                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2440         return 0;
2441 }
2442
2443 static int fbcon_copy_font(struct vc_data *vc, int con)
2444 {
2445         struct display *od = &fb_display[con];
2446         struct console_font *f = &vc->vc_font;
2447
2448         if (od->fontdata == f->data)
2449                 return 0;       /* already the same font... */
2450         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2451 }
2452
2453 /*
2454  *  User asked to set font; we are guaranteed that
2455  *      a) width and height are in range 1..32
2456  *      b) charcount does not exceed 512
2457  *  but lets not assume that, since someone might someday want to use larger
2458  *  fonts. And charcount of 512 is small for unicode support.
2459  *
2460  *  However, user space gives the font in 32 rows , regardless of
2461  *  actual font height. So a new API is needed if support for larger fonts
2462  *  is ever implemented.
2463  */
2464
2465 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2466 {
2467         unsigned charcount = font->charcount;
2468         int w = font->width;
2469         int h = font->height;
2470         int size;
2471         int i, csum;
2472         u8 *new_data, *data = font->data;
2473         int pitch = (font->width+7) >> 3;
2474
2475         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2476          * If not this check should be changed to charcount < 256 */
2477         if (charcount != 256 && charcount != 512)
2478                 return -EINVAL;
2479
2480         size = h * pitch * charcount;
2481
2482         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2483
2484         if (!new_data)
2485                 return -ENOMEM;
2486
2487         new_data += FONT_EXTRA_WORDS * sizeof(int);
2488         FNTSIZE(new_data) = size;
2489         FNTCHARCNT(new_data) = charcount;
2490         REFCOUNT(new_data) = 0; /* usage counter */
2491         for (i=0; i< charcount; i++) {
2492                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2493         }
2494
2495         /* Since linux has a nice crc32 function use it for counting font
2496          * checksums. */
2497         csum = crc32(0, new_data, size);
2498
2499         FNTSUM(new_data) = csum;
2500         /* Check if the same font is on some other console already */
2501         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2502                 struct vc_data *tmp = vc_cons[i].d;
2503
2504                 if (fb_display[i].userfont &&
2505                     fb_display[i].fontdata &&
2506                     FNTSUM(fb_display[i].fontdata) == csum &&
2507                     FNTSIZE(fb_display[i].fontdata) == size &&
2508                     tmp->vc_font.width == w &&
2509                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2510                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2511                         new_data = (u8 *)fb_display[i].fontdata;
2512                         break;
2513                 }
2514         }
2515         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2516 }
2517
2518 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2519 {
2520         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2521         const struct font_desc *f;
2522
2523         if (!name)
2524                 f = get_default_font(info->var.xres, info->var.yres);
2525         else if (!(f = find_font(name)))
2526                 return -ENOENT;
2527
2528         font->width = f->width;
2529         font->height = f->height;
2530         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2531 }
2532
2533 static u16 palette_red[16];
2534 static u16 palette_green[16];
2535 static u16 palette_blue[16];
2536
2537 static struct fb_cmap palette_cmap = {
2538         0, 16, palette_red, palette_green, palette_blue, NULL
2539 };
2540
2541 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2542 {
2543         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2544         int i, j, k, depth;
2545         u8 val;
2546
2547         if (fbcon_is_inactive(vc, info))
2548                 return -EINVAL;
2549
2550         if (!CON_IS_VISIBLE(vc))
2551                 return 0;
2552
2553         depth = fb_get_color_depth(&info->var, &info->fix);
2554         if (depth > 3) {
2555                 for (i = j = 0; i < 16; i++) {
2556                         k = table[i];
2557                         val = vc->vc_palette[j++];
2558                         palette_red[k] = (val << 8) | val;
2559                         val = vc->vc_palette[j++];
2560                         palette_green[k] = (val << 8) | val;
2561                         val = vc->vc_palette[j++];
2562                         palette_blue[k] = (val << 8) | val;
2563                 }
2564                 palette_cmap.len = 16;
2565                 palette_cmap.start = 0;
2566         /*
2567          * If framebuffer is capable of less than 16 colors,
2568          * use default palette of fbcon.
2569          */
2570         } else
2571                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2572
2573         return fb_set_cmap(&palette_cmap, info);
2574 }
2575
2576 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2577 {
2578         unsigned long p;
2579         int line;
2580
2581         if (vc->vc_num != fg_console || !softback_lines)
2582                 return (u16 *) (vc->vc_origin + offset);
2583         line = offset / vc->vc_size_row;
2584         if (line >= softback_lines)
2585                 return (u16 *) (vc->vc_origin + offset -
2586                                 softback_lines * vc->vc_size_row);
2587         p = softback_curr + offset;
2588         if (p >= softback_end)
2589                 p += softback_buf - softback_end;
2590         return (u16 *) p;
2591 }
2592
2593 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2594                                  int *px, int *py)
2595 {
2596         unsigned long ret;
2597         int x, y;
2598
2599         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2600                 unsigned long offset = (pos - vc->vc_origin) / 2;
2601
2602                 x = offset % vc->vc_cols;
2603                 y = offset / vc->vc_cols;
2604                 if (vc->vc_num == fg_console)
2605                         y += softback_lines;
2606                 ret = pos + (vc->vc_cols - x) * 2;
2607         } else if (vc->vc_num == fg_console && softback_lines) {
2608                 unsigned long offset = pos - softback_curr;
2609
2610                 if (pos < softback_curr)
2611                         offset += softback_end - softback_buf;
2612                 offset /= 2;
2613                 x = offset % vc->vc_cols;
2614                 y = offset / vc->vc_cols;
2615                 ret = pos + (vc->vc_cols - x) * 2;
2616                 if (ret == softback_end)
2617                         ret = softback_buf;
2618                 if (ret == softback_in)
2619                         ret = vc->vc_origin;
2620         } else {
2621                 /* Should not happen */
2622                 x = y = 0;
2623                 ret = vc->vc_origin;
2624         }
2625         if (px)
2626                 *px = x;
2627         if (py)
2628                 *py = y;
2629         return ret;
2630 }
2631
2632 /* As we might be inside of softback, we may work with non-contiguous buffer,
2633    that's why we have to use a separate routine. */
2634 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2635 {
2636         while (cnt--) {
2637                 u16 a = scr_readw(p);
2638                 if (!vc->vc_can_do_color)
2639                         a ^= 0x0800;
2640                 else if (vc->vc_hi_font_mask == 0x100)
2641                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2642                             (((a) & 0x0e00) << 4);
2643                 else
2644                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2645                             (((a) & 0x0700) << 4);
2646                 scr_writew(a, p++);
2647                 if (p == (u16 *) softback_end)
2648                         p = (u16 *) softback_buf;
2649                 if (p == (u16 *) softback_in)
2650                         p = (u16 *) vc->vc_origin;
2651         }
2652 }
2653
2654 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2655 {
2656         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2657         struct fbcon_ops *ops = info->fbcon_par;
2658         struct display *p = &fb_display[fg_console];
2659         int offset, limit, scrollback_old;
2660
2661         if (softback_top) {
2662                 if (vc->vc_num != fg_console)
2663                         return 0;
2664                 if (vc->vc_mode != KD_TEXT || !lines)
2665                         return 0;
2666                 if (logo_shown >= 0) {
2667                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2668
2669                         if (conp2->vc_top == logo_lines
2670                             && conp2->vc_bottom == conp2->vc_rows)
2671                                 conp2->vc_top = 0;
2672                         if (logo_shown == vc->vc_num) {
2673                                 unsigned long p, q;
2674                                 int i;
2675
2676                                 p = softback_in;
2677                                 q = vc->vc_origin +
2678                                     logo_lines * vc->vc_size_row;
2679                                 for (i = 0; i < logo_lines; i++) {
2680                                         if (p == softback_top)
2681                                                 break;
2682                                         if (p == softback_buf)
2683                                                 p = softback_end;
2684                                         p -= vc->vc_size_row;
2685                                         q -= vc->vc_size_row;
2686                                         scr_memcpyw((u16 *) q, (u16 *) p,
2687                                                     vc->vc_size_row);
2688                                 }
2689                                 softback_in = softback_curr = p;
2690                                 update_region(vc, vc->vc_origin,
2691                                               logo_lines * vc->vc_cols);
2692                         }
2693                         logo_shown = FBCON_LOGO_CANSHOW;
2694                 }
2695                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2696                 fbcon_redraw_softback(vc, p, lines);
2697                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2698                 return 0;
2699         }
2700
2701         if (!scrollback_phys_max)
2702                 return -ENOSYS;
2703
2704         scrollback_old = scrollback_current;
2705         scrollback_current -= lines;
2706         if (scrollback_current < 0)
2707                 scrollback_current = 0;
2708         else if (scrollback_current > scrollback_max)
2709                 scrollback_current = scrollback_max;
2710         if (scrollback_current == scrollback_old)
2711                 return 0;
2712
2713         if (fbcon_is_inactive(vc, info))
2714                 return 0;
2715
2716         fbcon_cursor(vc, CM_ERASE);
2717
2718         offset = p->yscroll - scrollback_current;
2719         limit = p->vrows;
2720         switch (p->scrollmode) {
2721         case SCROLL_WRAP_MOVE:
2722                 info->var.vmode |= FB_VMODE_YWRAP;
2723                 break;
2724         case SCROLL_PAN_MOVE:
2725         case SCROLL_PAN_REDRAW:
2726                 limit -= vc->vc_rows;
2727                 info->var.vmode &= ~FB_VMODE_YWRAP;
2728                 break;
2729         }
2730         if (offset < 0)
2731                 offset += limit;
2732         else if (offset >= limit)
2733                 offset -= limit;
2734
2735         ops->var.xoffset = 0;
2736         ops->var.yoffset = offset * vc->vc_font.height;
2737         ops->update_start(info);
2738
2739         if (!scrollback_current)
2740                 fbcon_cursor(vc, CM_DRAW);
2741         return 0;
2742 }
2743
2744 static int fbcon_set_origin(struct vc_data *vc)
2745 {
2746         if (softback_lines)
2747                 fbcon_scrolldelta(vc, softback_lines);
2748         return 0;
2749 }
2750
2751 static void fbcon_suspended(struct fb_info *info)
2752 {
2753         struct vc_data *vc = NULL;
2754         struct fbcon_ops *ops = info->fbcon_par;
2755
2756         if (!ops || ops->currcon < 0)
2757                 return;
2758         vc = vc_cons[ops->currcon].d;
2759
2760         /* Clear cursor, restore saved data */
2761         fbcon_cursor(vc, CM_ERASE);
2762 }
2763
2764 static void fbcon_resumed(struct fb_info *info)
2765 {
2766         struct vc_data *vc;
2767         struct fbcon_ops *ops = info->fbcon_par;
2768
2769         if (!ops || ops->currcon < 0)
2770                 return;
2771         vc = vc_cons[ops->currcon].d;
2772
2773         update_screen(vc);
2774 }
2775
2776 static void fbcon_modechanged(struct fb_info *info)
2777 {
2778         struct fbcon_ops *ops = info->fbcon_par;
2779         struct vc_data *vc;
2780         struct display *p;
2781         int rows, cols;
2782
2783         if (!ops || ops->currcon < 0)
2784                 return;
2785         vc = vc_cons[ops->currcon].d;
2786         if (vc->vc_mode != KD_TEXT ||
2787             registered_fb[con2fb_map[ops->currcon]] != info)
2788                 return;
2789
2790         p = &fb_display[vc->vc_num];
2791         set_blitting_type(vc, info);
2792
2793         if (CON_IS_VISIBLE(vc)) {
2794                 var_to_display(p, &info->var, info);
2795                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2796                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2797                 cols /= vc->vc_font.width;
2798                 rows /= vc->vc_font.height;
2799                 vc_resize(vc, cols, rows);
2800                 updatescrollmode(p, info, vc);
2801                 scrollback_max = 0;
2802                 scrollback_current = 0;
2803
2804                 if (!fbcon_is_inactive(vc, info)) {
2805                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2806                     ops->update_start(info);
2807                 }
2808
2809                 fbcon_set_palette(vc, color_table);
2810                 update_screen(vc);
2811                 if (softback_buf)
2812                         fbcon_update_softback(vc);
2813         }
2814 }
2815
2816 static void fbcon_set_all_vcs(struct fb_info *info)
2817 {
2818         struct fbcon_ops *ops = info->fbcon_par;
2819         struct vc_data *vc;
2820         struct display *p;
2821         int i, rows, cols;
2822
2823         if (!ops || ops->currcon < 0)
2824                 return;
2825
2826         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2827                 vc = vc_cons[i].d;
2828                 if (!vc || vc->vc_mode != KD_TEXT ||
2829                     registered_fb[con2fb_map[i]] != info)
2830                         continue;
2831
2832                 p = &fb_display[vc->vc_num];
2833                 set_blitting_type(vc, info);
2834                 var_to_display(p, &info->var, info);
2835                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2836                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2837                 cols /= vc->vc_font.width;
2838                 rows /= vc->vc_font.height;
2839                 vc_resize(vc, cols, rows);
2840
2841                 if (CON_IS_VISIBLE(vc)) {
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 =
2848                                 p->yscroll = 0;
2849                             ops->update_start(info);
2850                         }
2851
2852                         fbcon_set_palette(vc, color_table);
2853                         update_screen(vc);
2854                         if (softback_buf)
2855                                 fbcon_update_softback(vc);
2856                 }
2857         }
2858
2859         ops->p = &fb_display[ops->currcon];
2860 }
2861
2862 static int fbcon_mode_deleted(struct fb_info *info,
2863                               struct fb_videomode *mode)
2864 {
2865         struct fb_info *fb_info;
2866         struct display *p;
2867         int i, j, found = 0;
2868
2869         /* before deletion, ensure that mode is not in use */
2870         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2871                 j = con2fb_map[i];
2872                 if (j == -1)
2873                         continue;
2874                 fb_info = registered_fb[j];
2875                 if (fb_info != info)
2876                         continue;
2877                 p = &fb_display[i];
2878                 if (!p || !p->mode)
2879                         continue;
2880                 if (fb_mode_is_equal(p->mode, mode)) {
2881                         found = 1;
2882                         break;
2883                 }
2884         }
2885         return found;
2886 }
2887
2888 static int fbcon_fb_unregistered(int idx)
2889 {
2890         int i;
2891
2892         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2893                 if (con2fb_map[i] == idx)
2894                         con2fb_map[i] = -1;
2895         }
2896
2897         if (idx == info_idx) {
2898                 info_idx = -1;
2899
2900                 for (i = 0; i < FB_MAX; i++) {
2901                         if (registered_fb[i] != NULL) {
2902                                 info_idx = i;
2903                                 break;
2904                         }
2905                 }
2906         }
2907
2908         if (info_idx != -1) {
2909                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2910                         if (con2fb_map[i] == -1)
2911                                 con2fb_map[i] = info_idx;
2912                 }
2913         }
2914
2915         if (!num_registered_fb)
2916                 unregister_con_driver(&fb_con);
2917
2918         return 0;
2919 }
2920
2921 static int fbcon_fb_registered(int idx)
2922 {
2923         int ret = 0, i;
2924
2925         if (info_idx == -1) {
2926                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2927                         if (con2fb_map_boot[i] == idx) {
2928                                 info_idx = idx;
2929                                 break;
2930                         }
2931                 }
2932
2933                 if (info_idx != -1)
2934                         ret = fbcon_takeover(1);
2935         } else {
2936                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2937                         if (con2fb_map_boot[i] == idx &&
2938                             con2fb_map[i] == -1)
2939                                 set_con2fb_map(i, idx, 0);
2940                 }
2941         }
2942
2943         return ret;
2944 }
2945
2946 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2947 {
2948         struct fbcon_ops *ops = info->fbcon_par;
2949         struct vc_data *vc;
2950
2951         if (!ops || ops->currcon < 0)
2952                 return;
2953
2954         vc = vc_cons[ops->currcon].d;
2955         if (vc->vc_mode != KD_TEXT ||
2956                         registered_fb[con2fb_map[ops->currcon]] != info)
2957                 return;
2958
2959         if (CON_IS_VISIBLE(vc)) {
2960                 if (blank)
2961                         do_blank_screen(0);
2962                 else
2963                         do_unblank_screen(0);
2964         }
2965         ops->blank_state = blank;
2966 }
2967
2968 static void fbcon_new_modelist(struct fb_info *info)
2969 {
2970         int i;
2971         struct vc_data *vc;
2972         struct fb_var_screeninfo var;
2973         struct fb_videomode *mode;
2974
2975         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2976                 if (registered_fb[con2fb_map[i]] != info)
2977                         continue;
2978                 if (!fb_display[i].mode)
2979                         continue;
2980                 vc = vc_cons[i].d;
2981                 display_to_var(&var, &fb_display[i]);
2982                 mode = fb_find_nearest_mode(fb_display[i].mode,
2983                                             &info->modelist);
2984                 fb_videomode_to_var(&var, mode);
2985
2986                 if (vc)
2987                         fbcon_set_disp(info, &var, vc);
2988                 else
2989                         fbcon_preset_disp(info, &var, i);
2990
2991         }
2992 }
2993
2994 static int fbcon_event_notify(struct notifier_block *self,
2995                               unsigned long action, void *data)
2996 {
2997         struct fb_event *event = data;
2998         struct fb_info *info = event->info;
2999         struct fb_videomode *mode;
3000         struct fb_con2fbmap *con2fb;
3001         int ret = 0;
3002
3003         /*
3004          * ignore all events except driver registration and deregistration
3005          * if fbcon is not active
3006          */
3007         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3008                                   action == FB_EVENT_FB_UNREGISTERED))
3009                 goto done;
3010
3011         switch(action) {
3012         case FB_EVENT_SUSPEND:
3013                 fbcon_suspended(info);
3014                 break;
3015         case FB_EVENT_RESUME:
3016                 fbcon_resumed(info);
3017                 break;
3018         case FB_EVENT_MODE_CHANGE:
3019                 fbcon_modechanged(info);
3020                 break;
3021         case FB_EVENT_MODE_CHANGE_ALL:
3022                 fbcon_set_all_vcs(info);
3023                 break;
3024         case FB_EVENT_MODE_DELETE:
3025                 mode = event->data;
3026                 ret = fbcon_mode_deleted(info, mode);
3027                 break;
3028         case FB_EVENT_FB_REGISTERED:
3029                 ret = fbcon_fb_registered(info->node);
3030                 break;
3031         case FB_EVENT_FB_UNREGISTERED:
3032                 ret = fbcon_fb_unregistered(info->node);
3033                 break;
3034         case FB_EVENT_SET_CONSOLE_MAP:
3035                 con2fb = event->data;
3036                 ret = set_con2fb_map(con2fb->console - 1,
3037                                      con2fb->framebuffer, 1);
3038                 break;
3039         case FB_EVENT_GET_CONSOLE_MAP:
3040                 con2fb = event->data;
3041                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3042                 break;
3043         case FB_EVENT_BLANK:
3044                 fbcon_fb_blanked(info, *(int *)event->data);
3045                 break;
3046         case FB_EVENT_NEW_MODELIST:
3047                 fbcon_new_modelist(info);
3048                 break;
3049         }
3050
3051 done:
3052         return ret;
3053 }
3054
3055 /*
3056  *  The console `switch' structure for the frame buffer based console
3057  */
3058
3059 static const struct consw fb_con = {
3060         .owner                  = THIS_MODULE,
3061         .con_startup            = fbcon_startup,
3062         .con_init               = fbcon_init,
3063         .con_deinit             = fbcon_deinit,
3064         .con_clear              = fbcon_clear,
3065         .con_putc               = fbcon_putc,
3066         .con_putcs              = fbcon_putcs,
3067         .con_cursor             = fbcon_cursor,
3068         .con_scroll             = fbcon_scroll,
3069         .con_bmove              = fbcon_bmove,
3070         .con_switch             = fbcon_switch,
3071         .con_blank              = fbcon_blank,
3072         .con_font_set           = fbcon_set_font,
3073         .con_font_get           = fbcon_get_font,
3074         .con_font_default       = fbcon_set_def_font,
3075         .con_font_copy          = fbcon_copy_font,
3076         .con_set_palette        = fbcon_set_palette,
3077         .con_scrolldelta        = fbcon_scrolldelta,
3078         .con_set_origin         = fbcon_set_origin,
3079         .con_invert_region      = fbcon_invert_region,
3080         .con_screen_pos         = fbcon_screen_pos,
3081         .con_getxy              = fbcon_getxy,
3082         .con_resize             = fbcon_resize,
3083 };
3084
3085 static struct notifier_block fbcon_event_notifier = {
3086         .notifier_call  = fbcon_event_notify,
3087 };
3088
3089 static ssize_t store_rotate(struct class_device *class_device,
3090                             const char *buf, size_t count)
3091 {
3092         struct fb_info *info;
3093         int rotate, idx;
3094         char **last = NULL;
3095
3096         if (fbcon_has_exited)
3097                 return count;
3098
3099         acquire_console_sem();
3100         idx = con2fb_map[fg_console];
3101
3102         if (idx == -1 || registered_fb[idx] == NULL)
3103                 goto err;
3104
3105         info = registered_fb[idx];
3106         rotate = simple_strtoul(buf, last, 0);
3107         fbcon_rotate(info, rotate);
3108 err:
3109         release_console_sem();
3110         return count;
3111 }
3112
3113 static ssize_t store_rotate_all(struct class_device *class_device,
3114                                 const char *buf, size_t count)
3115 {
3116         struct fb_info *info;
3117         int rotate, idx;
3118         char **last = NULL;
3119
3120         if (fbcon_has_exited)
3121                 return count;
3122
3123         acquire_console_sem();
3124         idx = con2fb_map[fg_console];
3125
3126         if (idx == -1 || registered_fb[idx] == NULL)
3127                 goto err;
3128
3129         info = registered_fb[idx];
3130         rotate = simple_strtoul(buf, last, 0);
3131         fbcon_rotate_all(info, rotate);
3132 err:
3133         release_console_sem();
3134         return count;
3135 }
3136
3137 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3138 {
3139         struct fb_info *info;
3140         int rotate = 0, idx;
3141
3142         if (fbcon_has_exited)
3143                 return 0;
3144
3145         acquire_console_sem();
3146         idx = con2fb_map[fg_console];
3147
3148         if (idx == -1 || registered_fb[idx] == NULL)
3149                 goto err;
3150
3151         info = registered_fb[idx];
3152         rotate = fbcon_get_rotate(info);
3153 err:
3154         release_console_sem();
3155         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3156 }
3157
3158 static struct class_device_attribute class_device_attrs[] = {
3159         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3160         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3161 };
3162
3163 static int fbcon_init_class_device(void)
3164 {
3165         int i;
3166
3167         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3168                 class_device_create_file(fbcon_class_device,
3169                                          &class_device_attrs[i]);
3170         return 0;
3171 }
3172
3173 static void fbcon_start(void)
3174 {
3175         if (num_registered_fb) {
3176                 int i;
3177
3178                 acquire_console_sem();
3179
3180                 for (i = 0; i < FB_MAX; i++) {
3181                         if (registered_fb[i] != NULL) {
3182                                 info_idx = i;
3183                                 break;
3184                         }
3185                 }
3186
3187                 release_console_sem();
3188                 fbcon_takeover(0);
3189         }
3190 }
3191
3192 static void fbcon_exit(void)
3193 {
3194         struct fb_info *info;
3195         int i, j, mapped;
3196
3197         if (fbcon_has_exited)
3198                 return;
3199
3200 #ifdef CONFIG_ATARI
3201         free_irq(IRQ_AUTO_4, fbcon_vbl_handler);
3202 #endif
3203 #ifdef CONFIG_MAC
3204         if (MACH_IS_MAC && vbl_detected)
3205                 free_irq(IRQ_MAC_VBL, fbcon_vbl_handler);
3206 #endif
3207
3208         kfree((void *)softback_buf);
3209         softback_buf = 0UL;
3210
3211         for (i = 0; i < FB_MAX; i++) {
3212                 mapped = 0;
3213                 info = registered_fb[i];
3214
3215                 if (info == NULL)
3216                         continue;
3217
3218                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3219                         if (con2fb_map[j] == i)
3220                                 mapped = 1;
3221                 }
3222
3223                 if (mapped) {
3224                         if (info->fbops->fb_release)
3225                                 info->fbops->fb_release(info, 0);
3226                         module_put(info->fbops->owner);
3227
3228                         if (info->fbcon_par) {
3229                                 fbcon_del_cursor_timer(info);
3230                                 kfree(info->fbcon_par);
3231                                 info->fbcon_par = NULL;
3232                         }
3233
3234                         if (info->queue.func == fb_flashcursor)
3235                                 info->queue.func = NULL;
3236                 }
3237         }
3238
3239         fbcon_has_exited = 1;
3240 }
3241
3242 static int __init fb_console_init(void)
3243 {
3244         int i;
3245
3246         acquire_console_sem();
3247         fb_register_client(&fbcon_event_notifier);
3248         fbcon_class_device =
3249             class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3250
3251         if (IS_ERR(fbcon_class_device)) {
3252                 printk(KERN_WARNING "Unable to create class_device "
3253                        "for fbcon; errno = %ld\n",
3254                        PTR_ERR(fbcon_class_device));
3255                 fbcon_class_device = NULL;
3256         } else
3257                 fbcon_init_class_device();
3258
3259         for (i = 0; i < MAX_NR_CONSOLES; i++)
3260                 con2fb_map[i] = -1;
3261
3262         release_console_sem();
3263         fbcon_start();
3264         return 0;
3265 }
3266
3267 module_init(fb_console_init);
3268
3269 #ifdef MODULE
3270
3271 static void __exit fbcon_deinit_class_device(void)
3272 {
3273         int i;
3274
3275         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3276                 class_device_remove_file(fbcon_class_device,
3277                                          &class_device_attrs[i]);
3278 }
3279
3280 static void __exit fb_console_exit(void)
3281 {
3282         acquire_console_sem();
3283         fb_unregister_client(&fbcon_event_notifier);
3284         fbcon_deinit_class_device();
3285         class_device_destroy(fb_class, MKDEV(0, 0));
3286         fbcon_exit();
3287         release_console_sem();
3288         unregister_con_driver(&fb_con);
3289 }
3290
3291 module_exit(fb_console_exit);
3292
3293 #endif
3294
3295 MODULE_LICENSE("GPL");