drivers/video/console/fbcon.c

   1 /*
   2  *  linux/drivers/video/fbcon.c -- Low level frame buffer based console driver
   3  *
   4  *      Copyright (C) 1995 Geert Uytterhoeven
   5  *
   6  *
   7  *  This file is based on the original Amiga console driver (amicon.c):
   8  *
   9  *      Copyright (C) 1993 Hamish Macdonald
  10  *                         Greg Harp
  11  *      Copyright (C) 1994 David Carter [carter@compsci.bristol.ac.uk]
  12  *
  13  *            with work by William Rucklidge (wjr@cs.cornell.edu)
  14  *                         Geert Uytterhoeven
  15  *                         Jes Sorensen (jds@kom.auc.dk)
  16  *                         Martin Apel
  17  *
  18  *  and on the original Atari console driver (atacon.c):
  19  *
  20  *      Copyright (C) 1993 Bjoern Brauel
  21  *                         Roman Hodek
  22  *
  23  *            with work by Guenther Kelleter
  24  *                         Martin Schaller
  25  *                         Andreas Schwab
  26  *
  27  *  Hardware cursor support added by Emmanuel Marty (core@ggi-project.org)
  28  *  Smart redraw scrolling, arbitrary font width support, 512char font support
  29  *  and software scrollback added by
  30  *                         Jakub Jelinek (jj@ultra.linux.cz)
  31  *
  32  *  Random hacking by Martin Mares <mj@ucw.cz>
  33  *
  34  *      2001 - Documented with DocBook
  35  *      - Brad Douglas <brad@neruo.com>
  36  *
  37  *  The low level operations for the various display memory organizations are
  38  *  now in separate source files.
  39  *
  40  *  Currently the following organizations are supported:
  41  *
  42  *    o afb                     Amiga bitplanes
  43  *    o cfb{2,4,8,16,24,32}     Packed pixels
  44  *    o ilbm                    Amiga interleaved bitplanes
  45  *    o iplan2p[248]            Atari interleaved bitplanes
  46  *    o mfb                     Monochrome
  47  *    o vga                     VGA characters/attributes
  48  *
  49  *  To do:
  50  *
  51  *    - Implement 16 plane mode (iplan2p16)
  52  *
  53  *
  54  *  This file is subject to the terms and conditions of the GNU General Public
  55  *  License.  See the file COPYING in the main directory of this archive for
  56  *  more details.
  57  */
  58
  59 #undef FBCONDEBUG
  60
  61 #include <linux/module.h>
  62 #include <linux/types.h>
  63 #include <linux/fs.h>
  64 #include <linux/kernel.h>
  65 #include <linux/delay.h>        /* MSch: for IRQ probe */
  66 #include <linux/console.h>
  67 #include <linux/string.h>
  68 #include <linux/kd.h>
  69 #include <linux/slab.h>
  70 #include <linux/fb.h>
  71 #include <linux/vt_kern.h>
  72 #include <linux/selection.h>
  73 #include <linux/font.h>
  74 #include <linux/smp.h>
  75 #include <linux/init.h>
  76 #include <linux/interrupt.h>
  77 #include <linux/crc32.h> /* For counting font checksums */
  78 #include <asm/irq.h>
  79 #include <asm/system.h>
  80 #include <asm/uaccess.h>
  81 #ifdef CONFIG_ATARI
  82 #include <asm/atariints.h>
  83 #endif
  84 #ifdef CONFIG_MAC
  85 #include <asm/macints.h>
  86 #endif
  87 #if defined(__mc68000__) || defined(CONFIG_APUS)
  88 #include <asm/machdep.h>
  89 #include <asm/setup.h>
  90 #endif
  91
  92 #include "fbcon.h"
  93
  94 #ifdef FBCONDEBUG
  95 #  define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , ## args)
  96 #else
  97 #  define DPRINTK(fmt, args...)
  98 #endif
  99
 100 enum {
 101         FBCON_LOGO_CANSHOW      = -1,   /* the logo can be shown */
 102         FBCON_LOGO_DRAW         = -2,   /* draw the logo to a console */
 103         FBCON_LOGO_DONTSHOW     = -3    /* do not show the logo */
 104 };
 105
 106 static struct display fb_display[MAX_NR_CONSOLES];
 107
 108 static signed char con2fb_map[MAX_NR_CONSOLES];
 109 static signed char con2fb_map_boot[MAX_NR_CONSOLES];
 110 static int logo_height;
 111 static int logo_lines;
 112 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
 113    enums.  */
 114 static int logo_shown = FBCON_LOGO_CANSHOW;
 115 /* Software scrollback */
 116 static int fbcon_softback_size = 32768;
 117 static unsigned long softback_buf, softback_curr;
 118 static unsigned long softback_in;
 119 static unsigned long softback_top, softback_end;
 120 static int softback_lines;
 121 /* console mappings */
 122 static int first_fb_vc;
 123 static int last_fb_vc = MAX_NR_CONSOLES - 1;
 124 static int fbcon_is_default = 1;
 125 static int fbcon_has_exited;
 126
 127 /* font data */
 128 static char fontname[40];
 129
 130 /* current fb_info */
 131 static int info_idx = -1;
 132
 133 /* console rotation */
 134 static int rotate;
 135 static int fbcon_has_sysfs;
 136
 137 static const struct consw fb_con;
 138
 139 #define CM_SOFTBACK     (8)
 140
 141 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 142
 143 static int fbcon_set_origin(struct vc_data *);
 144
 145 #define CURSOR_DRAW_DELAY               (1)
 146
 147 /* # VBL ints between cursor state changes */
 148 #define ATARI_CURSOR_BLINK_RATE         (42)
 149 #define MAC_CURSOR_BLINK_RATE           (32)
 150 #define DEFAULT_CURSOR_BLINK_RATE       (20)
 151
 152 static int vbl_cursor_cnt;
 153
 154 #define divides(a, b)   ((!(a) || (b)%(a)) ? 0 : 1)
 155
 156 /*
 157  *  Interface used by the world
 158  */
 159
 160 static const char *fbcon_startup(void);
 161 static void fbcon_init(struct vc_data *vc, int init);
 162 static void fbcon_deinit(struct vc_data *vc);
 163 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
 164                         int width);
 165 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos);
 166 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
 167                         int count, int ypos, int xpos);
 168 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only);
 169 static void fbcon_cursor(struct vc_data *vc, int mode);
 170 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
 171                         int count);
 172 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
 173                         int height, int width);
 174 static int fbcon_switch(struct vc_data *vc);
 175 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch);
 176 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table);
 177 static int fbcon_scrolldelta(struct vc_data *vc, int lines);
 178
 179 /*
 180  *  Internal routines
 181  */
 182 static __inline__ void ywrap_up(struct vc_data *vc, int count);
 183 static __inline__ void ywrap_down(struct vc_data *vc, int count);
 184 static __inline__ void ypan_up(struct vc_data *vc, int count);
 185 static __inline__ void ypan_down(struct vc_data *vc, int count);
 186 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
 187                             int dy, int dx, int height, int width, u_int y_break);
 188 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 189                            struct vc_data *vc);
 190 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 191                               int unit);
 192 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
 193                               int line, int count, int dy);
 194 static void fbcon_modechanged(struct fb_info *info);
 195 static void fbcon_set_all_vcs(struct fb_info *info);
 196 static void fbcon_start(void);
 197 static void fbcon_exit(void);
 198 static struct class_device *fbcon_class_device;
 199
 200 #ifdef CONFIG_MAC
 201 /*
 202  * On the Macintoy, there may or may not be a working VBL int. We need to probe
 203  */
 204 static int vbl_detected;
 205
 206 static irqreturn_t fb_vbl_detect(int irq, void *dummy)
 207 {
 208         vbl_detected++;
 209         return IRQ_HANDLED;
 210 }
 211 #endif
 212
 213 #ifdef CONFIG_FRAMEBUFFER_CONSOLE_ROTATION
 214 static inline void fbcon_set_rotation(struct fb_info *info)
 215 {
 216         struct fbcon_ops *ops = info->fbcon_par;
 217
 218         if (!(info->flags & FBINFO_MISC_TILEBLITTING) &&
 219             ops->p->con_rotate < 4)
 220                 ops->rotate = ops->p->con_rotate;
 221         else
 222                 ops->rotate = 0;
 223 }
 224
 225 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 226 {
 227         struct fbcon_ops *ops= info->fbcon_par;
 228         struct fb_info *fb_info;
 229
 230         if (!ops || ops->currcon == -1)
 231                 return;
 232
 233         fb_info = registered_fb[con2fb_map[ops->currcon]];
 234
 235         if (info == fb_info) {
 236                 struct display *p = &fb_display[ops->currcon];
 237
 238                 if (rotate < 4)
 239                         p->con_rotate = rotate;
 240                 else
 241                         p->con_rotate = 0;
 242
 243                 fbcon_modechanged(info);
 244         }
 245 }
 246
 247 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 248 {
 249         struct fbcon_ops *ops = info->fbcon_par;
 250         struct vc_data *vc;
 251         struct display *p;
 252         int i;
 253
 254         if (!ops || ops->currcon < 0 || rotate > 3)
 255                 return;
 256
 257         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 258                 vc = vc_cons[i].d;
 259                 if (!vc || vc->vc_mode != KD_TEXT ||
 260                     registered_fb[con2fb_map[i]] != info)
 261                         continue;
 262
 263                 p = &fb_display[vc->vc_num];
 264                 p->con_rotate = rotate;
 265         }
 266
 267         fbcon_set_all_vcs(info);
 268 }
 269 #else
 270 static inline void fbcon_set_rotation(struct fb_info *info)
 271 {
 272         struct fbcon_ops *ops = info->fbcon_par;
 273
 274         ops->rotate = FB_ROTATE_UR;
 275 }
 276
 277 static void fbcon_rotate(struct fb_info *info, u32 rotate)
 278 {
 279         return;
 280 }
 281
 282 static void fbcon_rotate_all(struct fb_info *info, u32 rotate)
 283 {
 284         return;
 285 }
 286 #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */
 287
 288 static int fbcon_get_rotate(struct fb_info *info)
 289 {
 290         struct fbcon_ops *ops = info->fbcon_par;
 291
 292         return (ops) ? ops->rotate : 0;
 293 }
 294
 295 static inline int fbcon_is_inactive(struct vc_data *vc, struct fb_info *info)
 296 {
 297         struct fbcon_ops *ops = info->fbcon_par;
 298
 299         return (info->state != FBINFO_STATE_RUNNING ||
 300                 vc->vc_mode != KD_TEXT || ops->graphics);
 301 }
 302
 303 static inline int get_color(struct vc_data *vc, struct fb_info *info,
 304               u16 c, int is_fg)
 305 {
 306         int depth = fb_get_color_depth(&info->var, &info->fix);
 307         int color = 0;
 308
 309         if (console_blanked) {
 310                 unsigned short charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
 311
 312                 c = vc->vc_video_erase_char & charmask;
 313         }
 314
 315         if (depth != 1)
 316                 color = (is_fg) ? attr_fgcol((vc->vc_hi_font_mask) ? 9 : 8, c)
 317                         : attr_bgcol((vc->vc_hi_font_mask) ? 13 : 12, c);
 318
 319         switch (depth) {
 320         case 1:
 321         {
 322                 int col = ~(0xfff << (max(info->var.green.length,
 323                                           max(info->var.red.length,
 324                                               info->var.blue.length)))) & 0xff;
 325
 326                 /* 0 or 1 */
 327                 int fg = (info->fix.visual != FB_VISUAL_MONO01) ? col : 0;
 328                 int bg = (info->fix.visual != FB_VISUAL_MONO01) ? 0 : col;
 329
 330                 if (console_blanked)
 331                         fg = bg;
 332
 333                 color = (is_fg) ? fg : bg;
 334                 break;
 335         }
 336         case 2:
 337                 /*
 338                  * Scale down 16-colors to 4 colors. Default 4-color palette
 339                  * is grayscale. However, simply dividing the values by 4
 340                  * will not work, as colors 1, 2 and 3 will be scaled-down
 341                  * to zero rendering them invisible.  So empirically convert
 342                  * colors to a sane 4-level grayscale.
 343                  */
 344                 switch (color) {
 345                 case 0:
 346                         color = 0; /* black */
 347                         break;
 348                 case 1 ... 6:
 349                         color = 2; /* white */
 350                         break;
 351                 case 7 ... 8:
 352                         color = 1; /* gray */
 353                         break;
 354                 default:
 355                         color = 3; /* intense white */
 356                         break;
 357                 }
 358                 break;
 359         case 3:
 360                 /*
 361                  * Last 8 entries of default 16-color palette is a more intense
 362                  * version of the first 8 (i.e., same chrominance, different
 363                  * luminance).
 364                  */
 365                 color &= 7;
 366                 break;
 367         }
 368
 369
 370         return color;
 371 }
 372
 373 static void fbcon_update_softback(struct vc_data *vc)
 374 {
 375         int l = fbcon_softback_size / vc->vc_size_row;
 376
 377         if (l > 5)
 378                 softback_end = softback_buf + l * vc->vc_size_row;
 379         else
 380                 /* Smaller scrollback makes no sense, and 0 would screw
 381                    the operation totally */
 382                 softback_top = 0;
 383 }
 384
 385 static void fb_flashcursor(struct work_struct *work)
 386 {
 387         struct fb_info *info = container_of(work, struct fb_info, queue);
 388         struct fbcon_ops *ops = info->fbcon_par;
 389         struct display *p;
 390         struct vc_data *vc = NULL;
 391         int c;
 392         int mode;
 393
 394         acquire_console_sem();
 395         if (ops && ops->currcon != -1)
 396                 vc = vc_cons[ops->currcon].d;
 397
 398         if (!vc || !CON_IS_VISIBLE(vc) ||
 399             registered_fb[con2fb_map[vc->vc_num]] != info ||
 400             vc->vc_deccm != 1) {
 401                 release_console_sem();
 402                 return;
 403         }
 404
 405         p = &fb_display[vc->vc_num];
 406         c = scr_readw((u16 *) vc->vc_pos);
 407         mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 408                 CM_ERASE : CM_DRAW;
 409         ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
 410                     get_color(vc, info, c, 0));
 411         release_console_sem();
 412 }
 413
 414 #if defined(CONFIG_ATARI) || defined(CONFIG_MAC)
 415 static int cursor_blink_rate;
 416 static irqreturn_t fb_vbl_handler(int irq, void *dev_id)
 417 {
 418         struct fb_info *info = dev_id;
 419
 420         if (vbl_cursor_cnt && --vbl_cursor_cnt == 0) {
 421                 schedule_work(&info->queue);
 422                 vbl_cursor_cnt = cursor_blink_rate;
 423         }
 424         return IRQ_HANDLED;
 425 }
 426 #endif
 427
 428 static void cursor_timer_handler(unsigned long dev_addr)
 429 {
 430         struct fb_info *info = (struct fb_info *) dev_addr;
 431         struct fbcon_ops *ops = info->fbcon_par;
 432
 433         schedule_work(&info->queue);
 434         mod_timer(&ops->cursor_timer, jiffies + HZ/5);
 435 }
 436
 437 static void fbcon_add_cursor_timer(struct fb_info *info)
 438 {
 439         struct fbcon_ops *ops = info->fbcon_par;
 440
 441         if ((!info->queue.func || info->queue.func == fb_flashcursor) &&
 442             !(ops->flags & FBCON_FLAGS_CURSOR_TIMER)) {
 443                 if (!info->queue.func)
 444                         INIT_WORK(&info->queue, fb_flashcursor);
 445
 446                 init_timer(&ops->cursor_timer);
 447                 ops->cursor_timer.function = cursor_timer_handler;
 448                 ops->cursor_timer.expires = jiffies + HZ / 5;
 449                 ops->cursor_timer.data = (unsigned long ) info;
 450                 add_timer(&ops->cursor_timer);
 451                 ops->flags |= FBCON_FLAGS_CURSOR_TIMER;
 452         }
 453 }
 454
 455 static void fbcon_del_cursor_timer(struct fb_info *info)
 456 {
 457         struct fbcon_ops *ops = info->fbcon_par;
 458
 459         if (info->queue.func == fb_flashcursor &&
 460             ops->flags & FBCON_FLAGS_CURSOR_TIMER) {
 461                 del_timer_sync(&ops->cursor_timer);
 462                 ops->flags &= ~FBCON_FLAGS_CURSOR_TIMER;
 463         }
 464 }
 465
 466 #ifndef MODULE
 467 static int __init fb_console_setup(char *this_opt)
 468 {
 469         char *options;
 470         int i, j;
 471
 472         if (!this_opt || !*this_opt)
 473                 return 1;
 474
 475         while ((options = strsep(&this_opt, ",")) != NULL) {
 476                 if (!strncmp(options, "font:", 5))
 477                         strcpy(fontname, options + 5);
 478
 479                 if (!strncmp(options, "scrollback:", 11)) {
 480                         options += 11;
 481                         if (*options) {
 482                                 fbcon_softback_size = simple_strtoul(options, &options, 0);
 483                                 if (*options == 'k' || *options == 'K') {
 484                                         fbcon_softback_size *= 1024;
 485                                         options++;
 486                                 }
 487                                 if (*options != ',')
 488                                         return 1;
 489                                 options++;
 490                         } else
 491                                 return 1;
 492                 }
 493
 494                 if (!strncmp(options, "map:", 4)) {
 495                         options += 4;
 496                         if (*options)
 497                                 for (i = 0, j = 0; i < MAX_NR_CONSOLES; i++) {
 498                                         if (!options[j])
 499                                                 j = 0;
 500                                         con2fb_map_boot[i] =
 501                                                 (options[j++]-'0') % FB_MAX;
 502                                 }
 503                         return 1;
 504                 }
 505
 506                 if (!strncmp(options, "vc:", 3)) {
 507                         options += 3;
 508                         if (*options)
 509                                 first_fb_vc = simple_strtoul(options, &options, 10) - 1;
 510                         if (first_fb_vc < 0)
 511                                 first_fb_vc = 0;
 512                         if (*options++ == '-')
 513                                 last_fb_vc = simple_strtoul(options, &options, 10) - 1;
 514                         fbcon_is_default = 0;
 515                 }
 516
 517                 if (!strncmp(options, "rotate:", 7)) {
 518                         options += 7;
 519                         if (*options)
 520                                 rotate = simple_strtoul(options, &options, 0);
 521                         if (rotate > 3)
 522                                 rotate = 0;
 523                 }
 524         }
 525         return 1;
 526 }
 527
 528 __setup("fbcon=", fb_console_setup);
 529 #endif
 530
 531 static int search_fb_in_map(int idx)
 532 {
 533         int i, retval = 0;
 534
 535         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 536                 if (con2fb_map[i] == idx)
 537                         retval = 1;
 538         }
 539         return retval;
 540 }
 541
 542 static int search_for_mapped_con(void)
 543 {
 544         int i, retval = 0;
 545
 546         for (i = first_fb_vc; i <= last_fb_vc; i++) {
 547                 if (con2fb_map[i] != -1)
 548                         retval = 1;
 549         }
 550         return retval;
 551 }
 552
 553 static int fbcon_takeover(int show_logo)
 554 {
 555         int err, i;
 556
 557         if (!num_registered_fb)
 558                 return -ENODEV;
 559
 560         if (!show_logo)
 561                 logo_shown = FBCON_LOGO_DONTSHOW;
 562
 563         for (i = first_fb_vc; i <= last_fb_vc; i++)
 564                 con2fb_map[i] = info_idx;
 565
 566         err = take_over_console(&fb_con, first_fb_vc, last_fb_vc,
 567                                 fbcon_is_default);
 568
 569         if (err) {
 570                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
 571                         con2fb_map[i] = -1;
 572                 }
 573                 info_idx = -1;
 574         }
 575
 576         return err;
 577 }
 578
 579 static void fbcon_prepare_logo(struct vc_data *vc, struct fb_info *info,
 580                                int cols, int rows, int new_cols, int new_rows)
 581 {
 582         /* Need to make room for the logo */
 583         struct fbcon_ops *ops = info->fbcon_par;
 584         int cnt, erase = vc->vc_video_erase_char, step;
 585         unsigned short *save = NULL, *r, *q;
 586
 587         /*
 588          * remove underline attribute from erase character
 589          * if black and white framebuffer.
 590          */
 591         if (fb_get_color_depth(&info->var, &info->fix) == 1)
 592                 erase &= ~0x400;
 593         logo_height = fb_prepare_logo(info, ops->rotate);
 594         logo_lines = (logo_height + vc->vc_font.height - 1) /
 595                 vc->vc_font.height;
 596         q = (unsigned short *) (vc->vc_origin +
 597                                 vc->vc_size_row * rows);
 598         step = logo_lines * cols;
 599         for (r = q - logo_lines * cols; r < q; r++)
 600                 if (scr_readw(r) != vc->vc_video_erase_char)
 601                         break;
 602         if (r != q && new_rows >= rows + logo_lines) {
 603                 save = kmalloc(logo_lines * new_cols * 2, GFP_KERNEL);
 604                 if (save) {
 605                         int i = cols < new_cols ? cols : new_cols;
 606                         scr_memsetw(save, erase, logo_lines * new_cols * 2);
 607                         r = q - step;
 608                         for (cnt = 0; cnt < logo_lines; cnt++, r += i)
 609                                 scr_memcpyw(save + cnt * new_cols, r, 2 * i);
 610                         r = q;
 611                 }
 612         }
 613         if (r == q) {
 614                 /* We can scroll screen down */
 615                 r = q - step - cols;
 616                 for (cnt = rows - logo_lines; cnt > 0; cnt--) {
 617                         scr_memcpyw(r + step, r, vc->vc_size_row);
 618                         r -= cols;
 619                 }
 620                 if (!save) {
 621                         int lines;
 622                         if (vc->vc_y + logo_lines >= rows)
 623                                 lines = rows - vc->vc_y - 1;
 624                         else
 625                                 lines = logo_lines;
 626                         vc->vc_y += lines;
 627                         vc->vc_pos += lines * vc->vc_size_row;
 628                 }
 629         }
 630         scr_memsetw((unsigned short *) vc->vc_origin,
 631                     erase,
 632                     vc->vc_size_row * logo_lines);
 633
 634         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
 635                 fbcon_clear_margins(vc, 0);
 636                 update_screen(vc);
 637         }
 638
 639         if (save) {
 640                 q = (unsigned short *) (vc->vc_origin +
 641                                         vc->vc_size_row *
 642                                         rows);
 643                 scr_memcpyw(q, save, logo_lines * new_cols * 2);
 644                 vc->vc_y += logo_lines;
 645                 vc->vc_pos += logo_lines * vc->vc_size_row;
 646                 kfree(save);
 647         }
 648
 649         if (logo_lines > vc->vc_bottom) {
 650                 logo_shown = FBCON_LOGO_CANSHOW;
 651                 printk(KERN_INFO
 652                        "fbcon_init: disable boot-logo (boot-logo bigger than screen).\n");
 653         } else if (logo_shown != FBCON_LOGO_DONTSHOW) {
 654                 logo_shown = FBCON_LOGO_DRAW;
 655                 vc->vc_top = logo_lines;
 656         }
 657 }
 658
 659 #ifdef CONFIG_FB_TILEBLITTING
 660 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 661 {
 662         struct fbcon_ops *ops = info->fbcon_par;
 663
 664         ops->p = &fb_display[vc->vc_num];
 665
 666         if ((info->flags & FBINFO_MISC_TILEBLITTING))
 667                 fbcon_set_tileops(vc, info);
 668         else {
 669                 fbcon_set_rotation(info);
 670                 fbcon_set_bitops(ops);
 671         }
 672 }
 673 #else
 674 static void set_blitting_type(struct vc_data *vc, struct fb_info *info)
 675 {
 676         struct fbcon_ops *ops = info->fbcon_par;
 677
 678         info->flags &= ~FBINFO_MISC_TILEBLITTING;
 679         ops->p = &fb_display[vc->vc_num];
 680         fbcon_set_rotation(info);
 681         fbcon_set_bitops(ops);
 682 }
 683 #endif /* CONFIG_MISC_TILEBLITTING */
 684
 685
 686 static int con2fb_acquire_newinfo(struct vc_data *vc, struct fb_info *info,
 687                                   int unit, int oldidx)
 688 {
 689         struct fbcon_ops *ops = NULL;
 690         int err = 0;
 691
 692         if (!try_module_get(info->fbops->owner))
 693                 err = -ENODEV;
 694
 695         if (!err && info->fbops->fb_open &&
 696             info->fbops->fb_open(info, 0))
 697                 err = -ENODEV;
 698
 699         if (!err) {
 700                 ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 701                 if (!ops)
 702                         err = -ENOMEM;
 703         }
 704
 705         if (!err) {
 706                 info->fbcon_par = ops;
 707                 set_blitting_type(vc, info);
 708         }
 709
 710         if (err) {
 711                 con2fb_map[unit] = oldidx;
 712                 module_put(info->fbops->owner);
 713         }
 714
 715         return err;
 716 }
 717
 718 static int con2fb_release_oldinfo(struct vc_data *vc, struct fb_info *oldinfo,
 719                                   struct fb_info *newinfo, int unit,
 720                                   int oldidx, int found)
 721 {
 722         struct fbcon_ops *ops = oldinfo->fbcon_par;
 723         int err = 0;
 724
 725         if (oldinfo->fbops->fb_release &&
 726             oldinfo->fbops->fb_release(oldinfo, 0)) {
 727                 con2fb_map[unit] = oldidx;
 728                 if (!found && newinfo->fbops->fb_release)
 729                         newinfo->fbops->fb_release(newinfo, 0);
 730                 if (!found)
 731                         module_put(newinfo->fbops->owner);
 732                 err = -ENODEV;
 733         }
 734
 735         if (!err) {
 736                 fbcon_del_cursor_timer(oldinfo);
 737                 kfree(ops->cursor_state.mask);
 738                 kfree(ops->cursor_data);
 739                 kfree(ops->fontbuffer);
 740                 kfree(oldinfo->fbcon_par);
 741                 oldinfo->fbcon_par = NULL;
 742                 module_put(oldinfo->fbops->owner);
 743                 /*
 744                   If oldinfo and newinfo are driving the same hardware,
 745                   the fb_release() method of oldinfo may attempt to
 746                   restore the hardware state.  This will leave the
 747                   newinfo in an undefined state. Thus, a call to
 748                   fb_set_par() may be needed for the newinfo.
 749                 */
 750                 if (newinfo->fbops->fb_set_par)
 751                         newinfo->fbops->fb_set_par(newinfo);
 752         }
 753
 754         return err;
 755 }
 756
 757 static void con2fb_init_display(struct vc_data *vc, struct fb_info *info,
 758                                 int unit, int show_logo)
 759 {
 760         struct fbcon_ops *ops = info->fbcon_par;
 761
 762         ops->currcon = fg_console;
 763
 764         if (info->fbops->fb_set_par && !(ops->flags & FBCON_FLAGS_INIT))
 765                 info->fbops->fb_set_par(info);
 766
 767         ops->flags |= FBCON_FLAGS_INIT;
 768         ops->graphics = 0;
 769
 770         if (vc)
 771                 fbcon_set_disp(info, &info->var, vc);
 772         else
 773                 fbcon_preset_disp(info, &info->var, unit);
 774
 775         if (show_logo) {
 776                 struct vc_data *fg_vc = vc_cons[fg_console].d;
 777                 struct fb_info *fg_info =
 778                         registered_fb[con2fb_map[fg_console]];
 779
 780                 fbcon_prepare_logo(fg_vc, fg_info, fg_vc->vc_cols,
 781                                    fg_vc->vc_rows, fg_vc->vc_cols,
 782                                    fg_vc->vc_rows);
 783         }
 784
 785         update_screen(vc_cons[fg_console].d);
 786 }
 787
 788 /**
 789  *      set_con2fb_map - map console to frame buffer device
 790  *      @unit: virtual console number to map
 791  *      @newidx: frame buffer index to map virtual console to
 792  *      @user: user request
 793  *
 794  *      Maps a virtual console @unit to a frame buffer device
 795  *      @newidx.
 796  */
 797 static int set_con2fb_map(int unit, int newidx, int user)
 798 {
 799         struct vc_data *vc = vc_cons[unit].d;
 800         int oldidx = con2fb_map[unit];
 801         struct fb_info *info = registered_fb[newidx];
 802         struct fb_info *oldinfo = NULL;
 803         int found, err = 0;
 804
 805         if (oldidx == newidx)
 806                 return 0;
 807
 808         if (!info || fbcon_has_exited)
 809                 return -EINVAL;
 810
 811         if (!err && !search_for_mapped_con()) {
 812                 info_idx = newidx;
 813                 return fbcon_takeover(0);
 814         }
 815
 816         if (oldidx != -1)
 817                 oldinfo = registered_fb[oldidx];
 818
 819         found = search_fb_in_map(newidx);
 820
 821         acquire_console_sem();
 822         con2fb_map[unit] = newidx;
 823         if (!err && !found)
 824                 err = con2fb_acquire_newinfo(vc, info, unit, oldidx);
 825
 826
 827         /*
 828          * If old fb is not mapped to any of the consoles,
 829          * fbcon should release it.
 830          */
 831         if (!err && oldinfo && !search_fb_in_map(oldidx))
 832                 err = con2fb_release_oldinfo(vc, oldinfo, info, unit, oldidx,
 833                                              found);
 834
 835         if (!err) {
 836                 int show_logo = (fg_console == 0 && !user &&
 837                                  logo_shown != FBCON_LOGO_DONTSHOW);
 838
 839                 if (!found)
 840                         fbcon_add_cursor_timer(info);
 841                 con2fb_map_boot[unit] = newidx;
 842                 con2fb_init_display(vc, info, unit, show_logo);
 843         }
 844
 845         if (!search_fb_in_map(info_idx))
 846                 info_idx = newidx;
 847
 848         release_console_sem();
 849         return err;
 850 }
 851
 852 /*
 853  *  Low Level Operations
 854  */
 855 /* NOTE: fbcon cannot be __init: it may be called from take_over_console later */
 856 static int var_to_display(struct display *disp,
 857                           struct fb_var_screeninfo *var,
 858                           struct fb_info *info)
 859 {
 860         disp->xres_virtual = var->xres_virtual;
 861         disp->yres_virtual = var->yres_virtual;
 862         disp->bits_per_pixel = var->bits_per_pixel;
 863         disp->grayscale = var->grayscale;
 864         disp->nonstd = var->nonstd;
 865         disp->accel_flags = var->accel_flags;
 866         disp->height = var->height;
 867         disp->width = var->width;
 868         disp->red = var->red;
 869         disp->green = var->green;
 870         disp->blue = var->blue;
 871         disp->transp = var->transp;
 872         disp->rotate = var->rotate;
 873         disp->mode = fb_match_mode(var, &info->modelist);
 874         if (disp->mode == NULL)
 875                 /* This should not happen */
 876                 return -EINVAL;
 877         return 0;
 878 }
 879
 880 static void display_to_var(struct fb_var_screeninfo *var,
 881                            struct display *disp)
 882 {
 883         fb_videomode_to_var(var, disp->mode);
 884         var->xres_virtual = disp->xres_virtual;
 885         var->yres_virtual = disp->yres_virtual;
 886         var->bits_per_pixel = disp->bits_per_pixel;
 887         var->grayscale = disp->grayscale;
 888         var->nonstd = disp->nonstd;
 889         var->accel_flags = disp->accel_flags;
 890         var->height = disp->height;
 891         var->width = disp->width;
 892         var->red = disp->red;
 893         var->green = disp->green;
 894         var->blue = disp->blue;
 895         var->transp = disp->transp;
 896         var->rotate = disp->rotate;
 897 }
 898
 899 static const char *fbcon_startup(void)
 900 {
 901         const char *display_desc = "frame buffer device";
 902         struct display *p = &fb_display[fg_console];
 903         struct vc_data *vc = vc_cons[fg_console].d;
 904         const struct font_desc *font = NULL;
 905         struct module *owner;
 906         struct fb_info *info = NULL;
 907         struct fbcon_ops *ops;
 908         int rows, cols;
 909         int irqres;
 910
 911         irqres = 1;
 912         /*
 913          *  If num_registered_fb is zero, this is a call for the dummy part.
 914          *  The frame buffer devices weren't initialized yet.
 915          */
 916         if (!num_registered_fb || info_idx == -1)
 917                 return display_desc;
 918         /*
 919          * Instead of blindly using registered_fb[0], we use info_idx, set by
 920          * fb_console_init();
 921          */
 922         info = registered_fb[info_idx];
 923         if (!info)
 924                 return NULL;
 925
 926         owner = info->fbops->owner;
 927         if (!try_module_get(owner))
 928                 return NULL;
 929         if (info->fbops->fb_open && info->fbops->fb_open(info, 0)) {
 930                 module_put(owner);
 931                 return NULL;
 932         }
 933
 934         ops = kzalloc(sizeof(struct fbcon_ops), GFP_KERNEL);
 935         if (!ops) {
 936                 module_put(owner);
 937                 return NULL;
 938         }
 939
 940         ops->currcon = -1;
 941         ops->graphics = 1;
 942         ops->cur_rotate = -1;
 943         info->fbcon_par = ops;
 944         p->con_rotate = rotate;
 945         set_blitting_type(vc, info);
 946
 947         if (info->fix.type != FB_TYPE_TEXT) {
 948                 if (fbcon_softback_size) {
 949                         if (!softback_buf) {
 950                                 softback_buf =
 951                                     (unsigned long)
 952                                     kmalloc(fbcon_softback_size,
 953                                             GFP_KERNEL);
 954                                 if (!softback_buf) {
 955                                         fbcon_softback_size = 0;
 956                                         softback_top = 0;
 957                                 }
 958                         }
 959                 } else {
 960                         if (softback_buf) {
 961                                 kfree((void *) softback_buf);
 962                                 softback_buf = 0;
 963                                 softback_top = 0;
 964                         }
 965                 }
 966                 if (softback_buf)
 967                         softback_in = softback_top = softback_curr =
 968                             softback_buf;
 969                 softback_lines = 0;
 970         }
 971
 972         /* Setup default font */
 973         if (!p->fontdata) {
 974                 if (!fontname[0] || !(font = find_font(fontname)))
 975                         font = get_default_font(info->var.xres,
 976                                                 info->var.yres);
 977                 vc->vc_font.width = font->width;
 978                 vc->vc_font.height = font->height;
 979                 vc->vc_font.data = (void *)(p->fontdata = font->data);
 980                 vc->vc_font.charcount = 256; /* FIXME  Need to support more fonts */
 981         }
 982
 983         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
 984         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
 985         cols /= vc->vc_font.width;
 986         rows /= vc->vc_font.height;
 987         vc_resize(vc, cols, rows);
 988
 989         DPRINTK("mode:   %s\n", info->fix.id);
 990         DPRINTK("visual: %d\n", info->fix.visual);
 991         DPRINTK("res:    %dx%d-%d\n", info->var.xres,
 992                 info->var.yres,
 993                 info->var.bits_per_pixel);
 994
 995 #ifdef CONFIG_ATARI
 996         if (MACH_IS_ATARI) {
 997                 cursor_blink_rate = ATARI_CURSOR_BLINK_RATE;
 998                 irqres =
 999                     request_irq(IRQ_AUTO_4, fb_vbl_handler,
1000                                 IRQ_TYPE_PRIO, "framebuffer vbl",
1001                                 info);
1002         }
1003 #endif                          /* CONFIG_ATARI */
1004
1005 #ifdef CONFIG_MAC
1006         /*
1007          * On a Macintoy, the VBL interrupt may or may not be active.
1008          * As interrupt based cursor is more reliable and race free, we
1009          * probe for VBL interrupts.
1010          */
1011         if (MACH_IS_MAC) {
1012                 int ct = 0;
1013                 /*
1014                  * Probe for VBL: set temp. handler ...
1015                  */
1016                 irqres = request_irq(IRQ_MAC_VBL, fb_vbl_detect, 0,
1017                                      "framebuffer vbl", info);
1018                 vbl_detected = 0;
1019
1020                 /*
1021                  * ... and spin for 20 ms ...
1022                  */
1023                 while (!vbl_detected && ++ct < 1000)
1024                         udelay(20);
1025
1026                 if (ct == 1000)
1027                         printk
1028                             ("fbcon_startup: No VBL detected, using timer based cursor.\n");
1029
1030                 free_irq(IRQ_MAC_VBL, fb_vbl_detect);
1031
1032                 if (vbl_detected) {
1033                         /*
1034                          * interrupt based cursor ok
1035                          */
1036                         cursor_blink_rate = MAC_CURSOR_BLINK_RATE;
1037                         irqres =
1038                             request_irq(IRQ_MAC_VBL, fb_vbl_handler, 0,
1039                                         "framebuffer vbl", info);
1040                 } else {
1041                         /*
1042                          * VBL not detected: fall through, use timer based cursor
1043                          */
1044                         irqres = 1;
1045                 }
1046         }
1047 #endif                          /* CONFIG_MAC */
1048
1049         fbcon_add_cursor_timer(info);
1050         fbcon_has_exited = 0;
1051         return display_desc;
1052 }
1053
1054 static void fbcon_init(struct vc_data *vc, int init)
1055 {
1056         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1057         struct fbcon_ops *ops;
1058         struct vc_data **default_mode = vc->vc_display_fg;
1059         struct vc_data *svc = *default_mode;
1060         struct display *t, *p = &fb_display[vc->vc_num];
1061         int logo = 1, new_rows, new_cols, rows, cols, charcnt = 256;
1062         int cap;
1063
1064         if (info_idx == -1 || info == NULL)
1065             return;
1066
1067         cap = info->flags;
1068
1069         if (vc != svc || logo_shown == FBCON_LOGO_DONTSHOW ||
1070             (info->fix.type == FB_TYPE_TEXT))
1071                 logo = 0;
1072
1073         if (var_to_display(p, &info->var, info))
1074                 return;
1075
1076         /* If we are not the first console on this
1077            fb, copy the font from that console */
1078         t = &fb_display[fg_console];
1079         if (!p->fontdata) {
1080                 if (t->fontdata) {
1081                         struct vc_data *fvc = vc_cons[fg_console].d;
1082
1083                         vc->vc_font.data = (void *)(p->fontdata =
1084                                                     fvc->vc_font.data);
1085                         vc->vc_font.width = fvc->vc_font.width;
1086                         vc->vc_font.height = fvc->vc_font.height;
1087                         p->userfont = t->userfont;
1088
1089                         if (p->userfont)
1090                                 REFCOUNT(p->fontdata)++;
1091                 } else {
1092                         const struct font_desc *font = NULL;
1093
1094                         if (!fontname[0] || !(font = find_font(fontname)))
1095                                 font = get_default_font(info->var.xres,
1096                                                         info->var.yres);
1097                         vc->vc_font.width = font->width;
1098                         vc->vc_font.height = font->height;
1099                         vc->vc_font.data = (void *)(p->fontdata = font->data);
1100                         vc->vc_font.charcount = 256; /* FIXME  Need to
1101                                                         support more fonts */
1102                 }
1103         }
1104
1105         if (p->userfont)
1106                 charcnt = FNTCHARCNT(p->fontdata);
1107
1108         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1109         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1110         if (charcnt == 256) {
1111                 vc->vc_hi_font_mask = 0;
1112         } else {
1113                 vc->vc_hi_font_mask = 0x100;
1114                 if (vc->vc_can_do_color)
1115                         vc->vc_complement_mask <<= 1;
1116         }
1117
1118         if (!*svc->vc_uni_pagedir_loc)
1119                 con_set_default_unimap(svc);
1120         if (!*vc->vc_uni_pagedir_loc)
1121                 con_copy_unimap(vc, svc);
1122
1123         ops = info->fbcon_par;
1124         p->con_rotate = rotate;
1125         set_blitting_type(vc, info);
1126
1127         cols = vc->vc_cols;
1128         rows = vc->vc_rows;
1129         new_cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1130         new_rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1131         new_cols /= vc->vc_font.width;
1132         new_rows /= vc->vc_font.height;
1133         vc_resize(vc, new_cols, new_rows);
1134
1135         /*
1136          * We must always set the mode. The mode of the previous console
1137          * driver could be in the same resolution but we are using different
1138          * hardware so we have to initialize the hardware.
1139          *
1140          * We need to do it in fbcon_init() to prevent screen corruption.
1141          */
1142         if (CON_IS_VISIBLE(vc) && vc->vc_mode == KD_TEXT) {
1143                 if (info->fbops->fb_set_par &&
1144                     !(ops->flags & FBCON_FLAGS_INIT))
1145                         info->fbops->fb_set_par(info);
1146                 ops->flags |= FBCON_FLAGS_INIT;
1147         }
1148
1149         ops->graphics = 0;
1150
1151         if ((cap & FBINFO_HWACCEL_COPYAREA) &&
1152             !(cap & FBINFO_HWACCEL_DISABLED))
1153                 p->scrollmode = SCROLL_MOVE;
1154         else /* default to something safe */
1155                 p->scrollmode = SCROLL_REDRAW;
1156
1157         /*
1158          *  ++guenther: console.c:vc_allocate() relies on initializing
1159          *  vc_{cols,rows}, but we must not set those if we are only
1160          *  resizing the console.
1161          */
1162         if (!init) {
1163                 vc->vc_cols = new_cols;
1164                 vc->vc_rows = new_rows;
1165         }
1166
1167         if (logo)
1168                 fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
1169
1170         if (vc == svc && softback_buf)
1171                 fbcon_update_softback(vc);
1172
1173         if (ops->rotate_font && ops->rotate_font(info, vc)) {
1174                 ops->rotate = FB_ROTATE_UR;
1175                 set_blitting_type(vc, info);
1176         }
1177
1178         ops->p = &fb_display[fg_console];
1179 }
1180
1181 static void fbcon_free_font(struct display *p)
1182 {
1183         if (p->userfont && p->fontdata && (--REFCOUNT(p->fontdata) == 0))
1184                 kfree(p->fontdata - FONT_EXTRA_WORDS * sizeof(int));
1185         p->fontdata = NULL;
1186         p->userfont = 0;
1187 }
1188
1189 static void fbcon_deinit(struct vc_data *vc)
1190 {
1191         struct display *p = &fb_display[vc->vc_num];
1192         struct fb_info *info;
1193         struct fbcon_ops *ops;
1194         int idx;
1195
1196         fbcon_free_font(p);
1197         idx = con2fb_map[vc->vc_num];
1198
1199         if (idx == -1)
1200                 goto finished;
1201
1202         info = registered_fb[idx];
1203
1204         if (!info)
1205                 goto finished;
1206
1207         ops = info->fbcon_par;
1208
1209         if (!ops)
1210                 goto finished;
1211
1212         if (CON_IS_VISIBLE(vc))
1213                 fbcon_del_cursor_timer(info);
1214
1215         ops->flags &= ~FBCON_FLAGS_INIT;
1216 finished:
1217
1218         if (!con_is_bound(&fb_con))
1219                 fbcon_exit();
1220
1221         return;
1222 }
1223
1224 /* ====================================================================== */
1225
1226 /*  fbcon_XXX routines - interface used by the world
1227  *
1228  *  This system is now divided into two levels because of complications
1229  *  caused by hardware scrolling. Top level functions:
1230  *
1231  *      fbcon_bmove(), fbcon_clear(), fbcon_putc(), fbcon_clear_margins()
1232  *
1233  *  handles y values in range [0, scr_height-1] that correspond to real
1234  *  screen positions. y_wrap shift means that first line of bitmap may be
1235  *  anywhere on this display. These functions convert lineoffsets to
1236  *  bitmap offsets and deal with the wrap-around case by splitting blits.
1237  *
1238  *      fbcon_bmove_physical_8()    -- These functions fast implementations
1239  *      fbcon_clear_physical_8()    -- of original fbcon_XXX fns.
1240  *      fbcon_putc_physical_8()     -- (font width != 8) may be added later
1241  *
1242  *  WARNING:
1243  *
1244  *  At the moment fbcon_putc() cannot blit across vertical wrap boundary
1245  *  Implies should only really hardware scroll in rows. Only reason for
1246  *  restriction is simplicity & efficiency at the moment.
1247  */
1248
1249 static void fbcon_clear(struct vc_data *vc, int sy, int sx, int height,
1250                         int width)
1251 {
1252         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1253         struct fbcon_ops *ops = info->fbcon_par;
1254
1255         struct display *p = &fb_display[vc->vc_num];
1256         u_int y_break;
1257
1258         if (fbcon_is_inactive(vc, info))
1259                 return;
1260
1261         if (!height || !width)
1262                 return;
1263
1264         /* Split blits that cross physical y_wrap boundary */
1265
1266         y_break = p->vrows - p->yscroll;
1267         if (sy < y_break && sy + height - 1 >= y_break) {
1268                 u_int b = y_break - sy;
1269                 ops->clear(vc, info, real_y(p, sy), sx, b, width);
1270                 ops->clear(vc, info, real_y(p, sy + b), sx, height - b,
1271                                  width);
1272         } else
1273                 ops->clear(vc, info, real_y(p, sy), sx, height, width);
1274 }
1275
1276 static void fbcon_putcs(struct vc_data *vc, const unsigned short *s,
1277                         int count, int ypos, int xpos)
1278 {
1279         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1280         struct display *p = &fb_display[vc->vc_num];
1281         struct fbcon_ops *ops = info->fbcon_par;
1282
1283         if (!fbcon_is_inactive(vc, info))
1284                 ops->putcs(vc, info, s, count, real_y(p, ypos), xpos,
1285                            get_color(vc, info, scr_readw(s), 1),
1286                            get_color(vc, info, scr_readw(s), 0));
1287 }
1288
1289 static void fbcon_putc(struct vc_data *vc, int c, int ypos, int xpos)
1290 {
1291         unsigned short chr;
1292
1293         scr_writew(c, &chr);
1294         fbcon_putcs(vc, &chr, 1, ypos, xpos);
1295 }
1296
1297 static void fbcon_clear_margins(struct vc_data *vc, int bottom_only)
1298 {
1299         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1300         struct fbcon_ops *ops = info->fbcon_par;
1301
1302         if (!fbcon_is_inactive(vc, info))
1303                 ops->clear_margins(vc, info, bottom_only);
1304 }
1305
1306 static void fbcon_cursor(struct vc_data *vc, int mode)
1307 {
1308         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1309         struct fbcon_ops *ops = info->fbcon_par;
1310         int y;
1311         int c = scr_readw((u16 *) vc->vc_pos);
1312
1313         if (fbcon_is_inactive(vc, info))
1314                 return;
1315
1316         ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
1317         if (mode & CM_SOFTBACK) {
1318                 mode &= ~CM_SOFTBACK;
1319                 y = softback_lines;
1320         } else {
1321                 if (softback_lines)
1322                         fbcon_set_origin(vc);
1323                 y = 0;
1324         }
1325
1326         ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
1327                     get_color(vc, info, c, 0));
1328         vbl_cursor_cnt = CURSOR_DRAW_DELAY;
1329 }
1330
1331 static int scrollback_phys_max = 0;
1332 static int scrollback_max = 0;
1333 static int scrollback_current = 0;
1334
1335 /*
1336  * If no vc is existent yet, just set struct display
1337  */
1338 static void fbcon_preset_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1339                               int unit)
1340 {
1341         struct display *p = &fb_display[unit];
1342         struct display *t = &fb_display[fg_console];
1343
1344         if (var_to_display(p, var, info))
1345                 return;
1346
1347         p->fontdata = t->fontdata;
1348         p->userfont = t->userfont;
1349         if (p->userfont)
1350                 REFCOUNT(p->fontdata)++;
1351 }
1352
1353 static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
1354                            struct vc_data *vc)
1355 {
1356         struct display *p = &fb_display[vc->vc_num], *t;
1357         struct vc_data **default_mode = vc->vc_display_fg;
1358         struct vc_data *svc = *default_mode;
1359         struct fbcon_ops *ops = info->fbcon_par;
1360         int rows, cols, charcnt = 256;
1361
1362         if (var_to_display(p, var, info))
1363                 return;
1364         t = &fb_display[svc->vc_num];
1365         if (!vc->vc_font.data) {
1366                 vc->vc_font.data = (void *)(p->fontdata = t->fontdata);
1367                 vc->vc_font.width = (*default_mode)->vc_font.width;
1368                 vc->vc_font.height = (*default_mode)->vc_font.height;
1369                 p->userfont = t->userfont;
1370                 if (p->userfont)
1371                         REFCOUNT(p->fontdata)++;
1372         }
1373         if (p->userfont)
1374                 charcnt = FNTCHARCNT(p->fontdata);
1375
1376         var->activate = FB_ACTIVATE_NOW;
1377         info->var.activate = var->activate;
1378         var->yoffset = info->var.yoffset;
1379         var->xoffset = info->var.xoffset;
1380         fb_set_var(info, var);
1381         ops->var = info->var;
1382         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
1383         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
1384         if (charcnt == 256) {
1385                 vc->vc_hi_font_mask = 0;
1386         } else {
1387                 vc->vc_hi_font_mask = 0x100;
1388                 if (vc->vc_can_do_color)
1389                         vc->vc_complement_mask <<= 1;
1390         }
1391
1392         if (!*svc->vc_uni_pagedir_loc)
1393                 con_set_default_unimap(svc);
1394         if (!*vc->vc_uni_pagedir_loc)
1395                 con_copy_unimap(vc, svc);
1396
1397         cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
1398         rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
1399         cols /= vc->vc_font.width;
1400         rows /= vc->vc_font.height;
1401         vc_resize(vc, cols, rows);
1402
1403         if (CON_IS_VISIBLE(vc)) {
1404                 update_screen(vc);
1405                 if (softback_buf)
1406                         fbcon_update_softback(vc);
1407         }
1408 }
1409
1410 static __inline__ void ywrap_up(struct vc_data *vc, int count)
1411 {
1412         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1413         struct fbcon_ops *ops = info->fbcon_par;
1414         struct display *p = &fb_display[vc->vc_num];
1415
1416         p->yscroll += count;
1417         if (p->yscroll >= p->vrows)     /* Deal with wrap */
1418                 p->yscroll -= p->vrows;
1419         ops->var.xoffset = 0;
1420         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1421         ops->var.vmode |= FB_VMODE_YWRAP;
1422         ops->update_start(info);
1423         scrollback_max += count;
1424         if (scrollback_max > scrollback_phys_max)
1425                 scrollback_max = scrollback_phys_max;
1426         scrollback_current = 0;
1427 }
1428
1429 static __inline__ void ywrap_down(struct vc_data *vc, int count)
1430 {
1431         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1432         struct fbcon_ops *ops = info->fbcon_par;
1433         struct display *p = &fb_display[vc->vc_num];
1434
1435         p->yscroll -= count;
1436         if (p->yscroll < 0)     /* Deal with wrap */
1437                 p->yscroll += p->vrows;
1438         ops->var.xoffset = 0;
1439         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1440         ops->var.vmode |= FB_VMODE_YWRAP;
1441         ops->update_start(info);
1442         scrollback_max -= count;
1443         if (scrollback_max < 0)
1444                 scrollback_max = 0;
1445         scrollback_current = 0;
1446 }
1447
1448 static __inline__ void ypan_up(struct vc_data *vc, int count)
1449 {
1450         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1451         struct display *p = &fb_display[vc->vc_num];
1452         struct fbcon_ops *ops = info->fbcon_par;
1453
1454         p->yscroll += count;
1455         if (p->yscroll > p->vrows - vc->vc_rows) {
1456                 ops->bmove(vc, info, p->vrows - vc->vc_rows,
1457                             0, 0, 0, vc->vc_rows, vc->vc_cols);
1458                 p->yscroll -= p->vrows - vc->vc_rows;
1459         }
1460
1461         ops->var.xoffset = 0;
1462         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1463         ops->var.vmode &= ~FB_VMODE_YWRAP;
1464         ops->update_start(info);
1465         fbcon_clear_margins(vc, 1);
1466         scrollback_max += count;
1467         if (scrollback_max > scrollback_phys_max)
1468                 scrollback_max = scrollback_phys_max;
1469         scrollback_current = 0;
1470 }
1471
1472 static __inline__ void ypan_up_redraw(struct vc_data *vc, int t, int count)
1473 {
1474         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1475         struct fbcon_ops *ops = info->fbcon_par;
1476         struct display *p = &fb_display[vc->vc_num];
1477
1478         p->yscroll += count;
1479
1480         if (p->yscroll > p->vrows - vc->vc_rows) {
1481                 p->yscroll -= p->vrows - vc->vc_rows;
1482                 fbcon_redraw_move(vc, p, t + count, vc->vc_rows - count, t);
1483         }
1484
1485         ops->var.xoffset = 0;
1486         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1487         ops->var.vmode &= ~FB_VMODE_YWRAP;
1488         ops->update_start(info);
1489         fbcon_clear_margins(vc, 1);
1490         scrollback_max += count;
1491         if (scrollback_max > scrollback_phys_max)
1492                 scrollback_max = scrollback_phys_max;
1493         scrollback_current = 0;
1494 }
1495
1496 static __inline__ void ypan_down(struct vc_data *vc, int count)
1497 {
1498         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1499         struct display *p = &fb_display[vc->vc_num];
1500         struct fbcon_ops *ops = info->fbcon_par;
1501
1502         p->yscroll -= count;
1503         if (p->yscroll < 0) {
1504                 ops->bmove(vc, info, 0, 0, p->vrows - vc->vc_rows,
1505                             0, vc->vc_rows, vc->vc_cols);
1506                 p->yscroll += p->vrows - vc->vc_rows;
1507         }
1508
1509         ops->var.xoffset = 0;
1510         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1511         ops->var.vmode &= ~FB_VMODE_YWRAP;
1512         ops->update_start(info);
1513         fbcon_clear_margins(vc, 1);
1514         scrollback_max -= count;
1515         if (scrollback_max < 0)
1516                 scrollback_max = 0;
1517         scrollback_current = 0;
1518 }
1519
1520 static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
1521 {
1522         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1523         struct fbcon_ops *ops = info->fbcon_par;
1524         struct display *p = &fb_display[vc->vc_num];
1525
1526         p->yscroll -= count;
1527
1528         if (p->yscroll < 0) {
1529                 p->yscroll += p->vrows - vc->vc_rows;
1530                 fbcon_redraw_move(vc, p, t, vc->vc_rows - count, t + count);
1531         }
1532
1533         ops->var.xoffset = 0;
1534         ops->var.yoffset = p->yscroll * vc->vc_font.height;
1535         ops->var.vmode &= ~FB_VMODE_YWRAP;
1536         ops->update_start(info);
1537         fbcon_clear_margins(vc, 1);
1538         scrollback_max -= count;
1539         if (scrollback_max < 0)
1540                 scrollback_max = 0;
1541         scrollback_current = 0;
1542 }
1543
1544 static void fbcon_redraw_softback(struct vc_data *vc, struct display *p,
1545                                   long delta)
1546 {
1547         int count = vc->vc_rows;
1548         unsigned short *d, *s;
1549         unsigned long n;
1550         int line = 0;
1551
1552         d = (u16 *) softback_curr;
1553         if (d == (u16 *) softback_in)
1554                 d = (u16 *) vc->vc_origin;
1555         n = softback_curr + delta * vc->vc_size_row;
1556         softback_lines -= delta;
1557         if (delta < 0) {
1558                 if (softback_curr < softback_top && n < softback_buf) {
1559                         n += softback_end - softback_buf;
1560                         if (n < softback_top) {
1561                                 softback_lines -=
1562                                     (softback_top - n) / vc->vc_size_row;
1563                                 n = softback_top;
1564                         }
1565                 } else if (softback_curr >= softback_top
1566                            && n < softback_top) {
1567                         softback_lines -=
1568                             (softback_top - n) / vc->vc_size_row;
1569                         n = softback_top;
1570                 }
1571         } else {
1572                 if (softback_curr > softback_in && n >= softback_end) {
1573                         n += softback_buf - softback_end;
1574                         if (n > softback_in) {
1575                                 n = softback_in;
1576                                 softback_lines = 0;
1577                         }
1578                 } else if (softback_curr <= softback_in && n > softback_in) {
1579                         n = softback_in;
1580                         softback_lines = 0;
1581                 }
1582         }
1583         if (n == softback_curr)
1584                 return;
1585         softback_curr = n;
1586         s = (u16 *) softback_curr;
1587         if (s == (u16 *) softback_in)
1588                 s = (u16 *) vc->vc_origin;
1589         while (count--) {
1590                 unsigned short *start;
1591                 unsigned short *le;
1592                 unsigned short c;
1593                 int x = 0;
1594                 unsigned short attr = 1;
1595
1596                 start = s;
1597                 le = advance_row(s, 1);
1598                 do {
1599                         c = scr_readw(s);
1600                         if (attr != (c & 0xff00)) {
1601                                 attr = c & 0xff00;
1602                                 if (s > start) {
1603                                         fbcon_putcs(vc, start, s - start,
1604                                                     line, x);
1605                                         x += s - start;
1606                                         start = s;
1607                                 }
1608                         }
1609                         if (c == scr_readw(d)) {
1610                                 if (s > start) {
1611                                         fbcon_putcs(vc, start, s - start,
1612                                                     line, x);
1613                                         x += s - start + 1;
1614                                         start = s + 1;
1615                                 } else {
1616                                         x++;
1617                                         start++;
1618                                 }
1619                         }
1620                         s++;
1621                         d++;
1622                 } while (s < le);
1623                 if (s > start)
1624                         fbcon_putcs(vc, start, s - start, line, x);
1625                 line++;
1626                 if (d == (u16 *) softback_end)
1627                         d = (u16 *) softback_buf;
1628                 if (d == (u16 *) softback_in)
1629                         d = (u16 *) vc->vc_origin;
1630                 if (s == (u16 *) softback_end)
1631                         s = (u16 *) softback_buf;
1632                 if (s == (u16 *) softback_in)
1633                         s = (u16 *) vc->vc_origin;
1634         }
1635 }
1636
1637 static void fbcon_redraw_move(struct vc_data *vc, struct display *p,
1638                               int line, int count, int dy)
1639 {
1640         unsigned short *s = (unsigned short *)
1641                 (vc->vc_origin + vc->vc_size_row * line);
1642
1643         while (count--) {
1644                 unsigned short *start = s;
1645                 unsigned short *le = advance_row(s, 1);
1646                 unsigned short c;
1647                 int x = 0;
1648                 unsigned short attr = 1;
1649
1650                 do {
1651                         c = scr_readw(s);
1652                         if (attr != (c & 0xff00)) {
1653                                 attr = c & 0xff00;
1654                                 if (s > start) {
1655                                         fbcon_putcs(vc, start, s - start,
1656                                                     dy, x);
1657                                         x += s - start;
1658                                         start = s;
1659                                 }
1660                         }
1661                         console_conditional_schedule();
1662                         s++;
1663                 } while (s < le);
1664                 if (s > start)
1665                         fbcon_putcs(vc, start, s - start, dy, x);
1666                 console_conditional_schedule();
1667                 dy++;
1668         }
1669 }
1670
1671 static void fbcon_redraw(struct vc_data *vc, struct display *p,
1672                          int line, int count, int offset)
1673 {
1674         unsigned short *d = (unsigned short *)
1675             (vc->vc_origin + vc->vc_size_row * line);
1676         unsigned short *s = d + offset;
1677
1678         while (count--) {
1679                 unsigned short *start = s;
1680                 unsigned short *le = advance_row(s, 1);
1681                 unsigned short c;
1682                 int x = 0;
1683                 unsigned short attr = 1;
1684
1685                 do {
1686                         c = scr_readw(s);
1687                         if (attr != (c & 0xff00)) {
1688                                 attr = c & 0xff00;
1689                                 if (s > start) {
1690                                         fbcon_putcs(vc, start, s - start,
1691                                                     line, x);
1692                                         x += s - start;
1693                                         start = s;
1694                                 }
1695                         }
1696                         if (c == scr_readw(d)) {
1697                                 if (s > start) {
1698                                         fbcon_putcs(vc, start, s - start,
1699                                                      line, x);
1700                                         x += s - start + 1;
1701                                         start = s + 1;
1702                                 } else {
1703                                         x++;
1704                                         start++;
1705                                 }
1706                         }
1707                         scr_writew(c, d);
1708                         console_conditional_schedule();
1709                         s++;
1710                         d++;
1711                 } while (s < le);
1712                 if (s > start)
1713                         fbcon_putcs(vc, start, s - start, line, x);
1714                 console_conditional_schedule();
1715                 if (offset > 0)
1716                         line++;
1717                 else {
1718                         line--;
1719                         /* NOTE: We subtract two lines from these pointers */
1720                         s -= vc->vc_size_row;
1721                         d -= vc->vc_size_row;
1722                 }
1723         }
1724 }
1725
1726 static inline void fbcon_softback_note(struct vc_data *vc, int t,
1727                                        int count)
1728 {
1729         unsigned short *p;
1730
1731         if (vc->vc_num != fg_console)
1732                 return;
1733         p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
1734
1735         while (count) {
1736                 scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
1737                 count--;
1738                 p = advance_row(p, 1);
1739                 softback_in += vc->vc_size_row;
1740                 if (softback_in == softback_end)
1741                         softback_in = softback_buf;
1742                 if (softback_in == softback_top) {
1743                         softback_top += vc->vc_size_row;
1744                         if (softback_top == softback_end)
1745                                 softback_top = softback_buf;
1746                 }
1747         }
1748         softback_curr = softback_in;
1749 }
1750
1751 static int fbcon_scroll(struct vc_data *vc, int t, int b, int dir,
1752                         int count)
1753 {
1754         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1755         struct display *p = &fb_display[vc->vc_num];
1756         struct fbcon_ops *ops = info->fbcon_par;
1757         int scroll_partial = info->flags & FBINFO_PARTIAL_PAN_OK;
1758
1759         if (fbcon_is_inactive(vc, info))
1760                 return -EINVAL;
1761
1762         fbcon_cursor(vc, CM_ERASE);
1763
1764         /*
1765          * ++Geert: Only use ywrap/ypan if the console is in text mode
1766          * ++Andrew: Only use ypan on hardware text mode when scrolling the
1767          *           whole screen (prevents flicker).
1768          */
1769
1770         switch (dir) {
1771         case SM_UP:
1772                 if (count > vc->vc_rows)        /* Maximum realistic size */
1773                         count = vc->vc_rows;
1774                 if (softback_top)
1775                         fbcon_softback_note(vc, t, count);
1776                 if (logo_shown >= 0)
1777                         goto redraw_up;
1778                 switch (p->scrollmode) {
1779                 case SCROLL_MOVE:
1780                         ops->bmove(vc, info, t + count, 0, t, 0,
1781                                     b - t - count, vc->vc_cols);
1782                         ops->clear(vc, info, b - count, 0, count,
1783                                   vc->vc_cols);
1784                         break;
1785
1786                 case SCROLL_WRAP_MOVE:
1787                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1788                                 if (t > 0)
1789                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1790                                                     vc->vc_cols);
1791                                 ywrap_up(vc, count);
1792                                 if (vc->vc_rows - b > 0)
1793                                         fbcon_bmove(vc, b - count, 0, b, 0,
1794                                                     vc->vc_rows - b,
1795                                                     vc->vc_cols);
1796                         } else if (info->flags & FBINFO_READS_FAST)
1797                                 fbcon_bmove(vc, t + count, 0, t, 0,
1798                                             b - t - count, vc->vc_cols);
1799                         else
1800                                 goto redraw_up;
1801                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1802                         break;
1803
1804                 case SCROLL_PAN_REDRAW:
1805                         if ((p->yscroll + count <=
1806                              2 * (p->vrows - vc->vc_rows))
1807                             && ((!scroll_partial && (b - t == vc->vc_rows))
1808                                 || (scroll_partial
1809                                     && (b - t - count >
1810                                         3 * vc->vc_rows >> 2)))) {
1811                                 if (t > 0)
1812                                         fbcon_redraw_move(vc, p, 0, t, count);
1813                                 ypan_up_redraw(vc, t, count);
1814                                 if (vc->vc_rows - b > 0)
1815                                         fbcon_redraw_move(vc, p, b,
1816                                                           vc->vc_rows - b, b);
1817                         } else
1818                                 fbcon_redraw_move(vc, p, t + count, b - t - count, t);
1819                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1820                         break;
1821
1822                 case SCROLL_PAN_MOVE:
1823                         if ((p->yscroll + count <=
1824                              2 * (p->vrows - vc->vc_rows))
1825                             && ((!scroll_partial && (b - t == vc->vc_rows))
1826                                 || (scroll_partial
1827                                     && (b - t - count >
1828                                         3 * vc->vc_rows >> 2)))) {
1829                                 if (t > 0)
1830                                         fbcon_bmove(vc, 0, 0, count, 0, t,
1831                                                     vc->vc_cols);
1832                                 ypan_up(vc, count);
1833                                 if (vc->vc_rows - b > 0)
1834                                         fbcon_bmove(vc, b - count, 0, b, 0,
1835                                                     vc->vc_rows - b,
1836                                                     vc->vc_cols);
1837                         } else if (info->flags & FBINFO_READS_FAST)
1838                                 fbcon_bmove(vc, t + count, 0, t, 0,
1839                                             b - t - count, vc->vc_cols);
1840                         else
1841                                 goto redraw_up;
1842                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1843                         break;
1844
1845                 case SCROLL_REDRAW:
1846                       redraw_up:
1847                         fbcon_redraw(vc, p, t, b - t - count,
1848                                      count * vc->vc_cols);
1849                         fbcon_clear(vc, b - count, 0, count, vc->vc_cols);
1850                         scr_memsetw((unsigned short *) (vc->vc_origin +
1851                                                         vc->vc_size_row *
1852                                                         (b - count)),
1853                                     vc->vc_video_erase_char,
1854                                     vc->vc_size_row * count);
1855                         return 1;
1856                 }
1857                 break;
1858
1859         case SM_DOWN:
1860                 if (count > vc->vc_rows)        /* Maximum realistic size */
1861                         count = vc->vc_rows;
1862                 if (logo_shown >= 0)
1863                         goto redraw_down;
1864                 switch (p->scrollmode) {
1865                 case SCROLL_MOVE:
1866                         ops->bmove(vc, info, t, 0, t + count, 0,
1867                                     b - t - count, vc->vc_cols);
1868                         ops->clear(vc, info, t, 0, count, vc->vc_cols);
1869                         break;
1870
1871                 case SCROLL_WRAP_MOVE:
1872                         if (b - t - count > 3 * vc->vc_rows >> 2) {
1873                                 if (vc->vc_rows - b > 0)
1874                                         fbcon_bmove(vc, b, 0, b - count, 0,
1875                                                     vc->vc_rows - b,
1876                                                     vc->vc_cols);
1877                                 ywrap_down(vc, count);
1878                                 if (t > 0)
1879                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1880                                                     vc->vc_cols);
1881                         } else if (info->flags & FBINFO_READS_FAST)
1882                                 fbcon_bmove(vc, t, 0, t + count, 0,
1883                                             b - t - count, vc->vc_cols);
1884                         else
1885                                 goto redraw_down;
1886                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1887                         break;
1888
1889                 case SCROLL_PAN_MOVE:
1890                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1891                             && ((!scroll_partial && (b - t == vc->vc_rows))
1892                                 || (scroll_partial
1893                                     && (b - t - count >
1894                                         3 * vc->vc_rows >> 2)))) {
1895                                 if (vc->vc_rows - b > 0)
1896                                         fbcon_bmove(vc, b, 0, b - count, 0,
1897                                                     vc->vc_rows - b,
1898                                                     vc->vc_cols);
1899                                 ypan_down(vc, count);
1900                                 if (t > 0)
1901                                         fbcon_bmove(vc, count, 0, 0, 0, t,
1902                                                     vc->vc_cols);
1903                         } else if (info->flags & FBINFO_READS_FAST)
1904                                 fbcon_bmove(vc, t, 0, t + count, 0,
1905                                             b - t - count, vc->vc_cols);
1906                         else
1907                                 goto redraw_down;
1908                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1909                         break;
1910
1911                 case SCROLL_PAN_REDRAW:
1912                         if ((count - p->yscroll <= p->vrows - vc->vc_rows)
1913                             && ((!scroll_partial && (b - t == vc->vc_rows))
1914                                 || (scroll_partial
1915                                     && (b - t - count >
1916                                         3 * vc->vc_rows >> 2)))) {
1917                                 if (vc->vc_rows - b > 0)
1918                                         fbcon_redraw_move(vc, p, b, vc->vc_rows - b,
1919                                                           b - count);
1920                                 ypan_down_redraw(vc, t, count);
1921                                 if (t > 0)
1922                                         fbcon_redraw_move(vc, p, count, t, 0);
1923                         } else
1924                                 fbcon_redraw_move(vc, p, t, b - t - count, t + count);
1925                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1926                         break;
1927
1928                 case SCROLL_REDRAW:
1929                       redraw_down:
1930                         fbcon_redraw(vc, p, b - 1, b - t - count,
1931                                      -count * vc->vc_cols);
1932                         fbcon_clear(vc, t, 0, count, vc->vc_cols);
1933                         scr_memsetw((unsigned short *) (vc->vc_origin +
1934                                                         vc->vc_size_row *
1935                                                         t),
1936                                     vc->vc_video_erase_char,
1937                                     vc->vc_size_row * count);
1938                         return 1;
1939                 }
1940         }
1941         return 0;
1942 }
1943
1944
1945 static void fbcon_bmove(struct vc_data *vc, int sy, int sx, int dy, int dx,
1946                         int height, int width)
1947 {
1948         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1949         struct display *p = &fb_display[vc->vc_num];
1950
1951         if (fbcon_is_inactive(vc, info))
1952                 return;
1953
1954         if (!width || !height)
1955                 return;
1956
1957         /*  Split blits that cross physical y_wrap case.
1958          *  Pathological case involves 4 blits, better to use recursive
1959          *  code rather than unrolled case
1960          *
1961          *  Recursive invocations don't need to erase the cursor over and
1962          *  over again, so we use fbcon_bmove_rec()
1963          */
1964         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, height, width,
1965                         p->vrows - p->yscroll);
1966 }
1967
1968 static void fbcon_bmove_rec(struct vc_data *vc, struct display *p, int sy, int sx,
1969                             int dy, int dx, int height, int width, u_int y_break)
1970 {
1971         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
1972         struct fbcon_ops *ops = info->fbcon_par;
1973         u_int b;
1974
1975         if (sy < y_break && sy + height > y_break) {
1976                 b = y_break - sy;
1977                 if (dy < sy) {  /* Avoid trashing self */
1978                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1979                                         y_break);
1980                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1981                                         height - b, width, y_break);
1982                 } else {
1983                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1984                                         height - b, width, y_break);
1985                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1986                                         y_break);
1987                 }
1988                 return;
1989         }
1990
1991         if (dy < y_break && dy + height > y_break) {
1992                 b = y_break - dy;
1993                 if (dy < sy) {  /* Avoid trashing self */
1994                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
1995                                         y_break);
1996                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
1997                                         height - b, width, y_break);
1998                 } else {
1999                         fbcon_bmove_rec(vc, p, sy + b, sx, dy + b, dx,
2000                                         height - b, width, y_break);
2001                         fbcon_bmove_rec(vc, p, sy, sx, dy, dx, b, width,
2002                                         y_break);
2003                 }
2004                 return;
2005         }
2006         ops->bmove(vc, info, real_y(p, sy), sx, real_y(p, dy), dx,
2007                    height, width);
2008 }
2009
2010 static __inline__ void updatescrollmode(struct display *p,
2011                                         struct fb_info *info,
2012                                         struct vc_data *vc)
2013 {
2014         struct fbcon_ops *ops = info->fbcon_par;
2015         int fh = vc->vc_font.height;
2016         int cap = info->flags;
2017         u16 t = 0;
2018         int ypan = FBCON_SWAP(ops->rotate, info->fix.ypanstep,
2019                                   info->fix.xpanstep);
2020         int ywrap = FBCON_SWAP(ops->rotate, info->fix.ywrapstep, t);
2021         int yres = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2022         int vyres = FBCON_SWAP(ops->rotate, info->var.yres_virtual,
2023                                    info->var.xres_virtual);
2024         int good_pan = (cap & FBINFO_HWACCEL_YPAN) &&
2025                 divides(ypan, vc->vc_font.height) && vyres > yres;
2026         int good_wrap = (cap & FBINFO_HWACCEL_YWRAP) &&
2027                 divides(ywrap, vc->vc_font.height) &&
2028                 divides(vc->vc_font.height, vyres) &&
2029                 divides(vc->vc_font.height, yres);
2030         int reading_fast = cap & FBINFO_READS_FAST;
2031         int fast_copyarea = (cap & FBINFO_HWACCEL_COPYAREA) &&
2032                 !(cap & FBINFO_HWACCEL_DISABLED);
2033         int fast_imageblit = (cap & FBINFO_HWACCEL_IMAGEBLIT) &&
2034                 !(cap & FBINFO_HWACCEL_DISABLED);
2035
2036         p->vrows = vyres/fh;
2037         if (yres > (fh * (vc->vc_rows + 1)))
2038                 p->vrows -= (yres - (fh * vc->vc_rows)) / fh;
2039         if ((yres % fh) && (vyres % fh < yres % fh))
2040                 p->vrows--;
2041
2042         if (good_wrap || good_pan) {
2043                 if (reading_fast || fast_copyarea)
2044                         p->scrollmode = good_wrap ?
2045                                 SCROLL_WRAP_MOVE : SCROLL_PAN_MOVE;
2046                 else
2047                         p->scrollmode = good_wrap ? SCROLL_REDRAW :
2048                                 SCROLL_PAN_REDRAW;
2049         } else {
2050                 if (reading_fast || (fast_copyarea && !fast_imageblit))
2051                         p->scrollmode = SCROLL_MOVE;
2052                 else
2053                         p->scrollmode = SCROLL_REDRAW;
2054         }
2055 }
2056
2057 static int fbcon_resize(struct vc_data *vc, unsigned int width,
2058                         unsigned int height)
2059 {
2060         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2061         struct fbcon_ops *ops = info->fbcon_par;
2062         struct display *p = &fb_display[vc->vc_num];
2063         struct fb_var_screeninfo var = info->var;
2064         int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
2065
2066         virt_w = FBCON_SWAP(ops->rotate, width, height);
2067         virt_h = FBCON_SWAP(ops->rotate, height, width);
2068         virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
2069                                  vc->vc_font.height);
2070         virt_fh = FBCON_SWAP(ops->rotate, vc->vc_font.height,
2071                                  vc->vc_font.width);
2072         var.xres = virt_w * virt_fw;
2073         var.yres = virt_h * virt_fh;
2074         x_diff = info->var.xres - var.xres;
2075         y_diff = info->var.yres - var.yres;
2076         if (x_diff < 0 || x_diff > virt_fw ||
2077             y_diff < 0 || y_diff > virt_fh) {
2078                 const struct fb_videomode *mode;
2079
2080                 DPRINTK("attempting resize %ix%i\n", var.xres, var.yres);
2081                 mode = fb_find_best_mode(&var, &info->modelist);
2082                 if (mode == NULL)
2083                         return -EINVAL;
2084                 display_to_var(&var, p);
2085                 fb_videomode_to_var(&var, mode);
2086
2087                 if (virt_w > var.xres/virt_fw || virt_h > var.yres/virt_fh)
2088                         return -EINVAL;
2089
2090                 DPRINTK("resize now %ix%i\n", var.xres, var.yres);
2091                 if (CON_IS_VISIBLE(vc)) {
2092                         var.activate = FB_ACTIVATE_NOW |
2093                                 FB_ACTIVATE_FORCE;
2094                         fb_set_var(info, &var);
2095                 }
2096                 var_to_display(p, &info->var, info);
2097                 ops->var = info->var;
2098         }
2099         updatescrollmode(p, info, vc);
2100         return 0;
2101 }
2102
2103 static int fbcon_switch(struct vc_data *vc)
2104 {
2105         struct fb_info *info, *old_info = NULL;
2106         struct fbcon_ops *ops;
2107         struct display *p = &fb_display[vc->vc_num];
2108         struct fb_var_screeninfo var;
2109         int i, prev_console, charcnt = 256;
2110
2111         info = registered_fb[con2fb_map[vc->vc_num]];
2112         ops = info->fbcon_par;
2113
2114         if (softback_top) {
2115                 if (softback_lines)
2116                         fbcon_set_origin(vc);
2117                 softback_top = softback_curr = softback_in = softback_buf;
2118                 softback_lines = 0;
2119                 fbcon_update_softback(vc);
2120         }
2121
2122         if (logo_shown >= 0) {
2123                 struct vc_data *conp2 = vc_cons[logo_shown].d;
2124
2125                 if (conp2->vc_top == logo_lines
2126                     && conp2->vc_bottom == conp2->vc_rows)
2127                         conp2->vc_top = 0;
2128                 logo_shown = FBCON_LOGO_CANSHOW;
2129         }
2130
2131         prev_console = ops->currcon;
2132         if (prev_console != -1)
2133                 old_info = registered_fb[con2fb_map[prev_console]];
2134         /*
2135          * FIXME: If we have multiple fbdev's loaded, we need to
2136          * update all info->currcon.  Perhaps, we can place this
2137          * in a centralized structure, but this might break some
2138          * drivers.
2139          *
2140          * info->currcon = vc->vc_num;
2141          */
2142         for (i = 0; i < FB_MAX; i++) {
2143                 if (registered_fb[i] != NULL && registered_fb[i]->fbcon_par) {
2144                         struct fbcon_ops *o = registered_fb[i]->fbcon_par;
2145
2146                         o->currcon = vc->vc_num;
2147                 }
2148         }
2149         memset(&var, 0, sizeof(struct fb_var_screeninfo));
2150         display_to_var(&var, p);
2151         var.activate = FB_ACTIVATE_NOW;
2152
2153         /*
2154          * make sure we don't unnecessarily trip the memcmp()
2155          * in fb_set_var()
2156          */
2157         info->var.activate = var.activate;
2158         var.yoffset = info->var.yoffset;
2159         var.xoffset = info->var.xoffset;
2160         var.vmode = info->var.vmode;
2161         fb_set_var(info, &var);
2162         ops->var = info->var;
2163
2164         if (old_info != NULL && (old_info != info ||
2165                                  info->flags & FBINFO_MISC_ALWAYS_SETPAR)) {
2166                 if (info->fbops->fb_set_par)
2167                         info->fbops->fb_set_par(info);
2168
2169                 if (old_info != info)
2170                         fbcon_del_cursor_timer(old_info);
2171         }
2172
2173         if (fbcon_is_inactive(vc, info) ||
2174             ops->blank_state != FB_BLANK_UNBLANK)
2175                 fbcon_del_cursor_timer(info);
2176         else
2177                 fbcon_add_cursor_timer(info);
2178
2179         set_blitting_type(vc, info);
2180         ops->cursor_reset = 1;
2181
2182         if (ops->rotate_font && ops->rotate_font(info, vc)) {
2183                 ops->rotate = FB_ROTATE_UR;
2184                 set_blitting_type(vc, info);
2185         }
2186
2187         vc->vc_can_do_color = (fb_get_color_depth(&info->var, &info->fix)!=1);
2188         vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
2189
2190         if (p->userfont)
2191                 charcnt = FNTCHARCNT(vc->vc_font.data);
2192
2193         if (charcnt > 256)
2194                 vc->vc_complement_mask <<= 1;
2195
2196         updatescrollmode(p, info, vc);
2197
2198         switch (p->scrollmode) {
2199         case SCROLL_WRAP_MOVE:
2200                 scrollback_phys_max = p->vrows - vc->vc_rows;
2201                 break;
2202         case SCROLL_PAN_MOVE:
2203         case SCROLL_PAN_REDRAW:
2204                 scrollback_phys_max = p->vrows - 2 * vc->vc_rows;
2205                 if (scrollback_phys_max < 0)
2206                         scrollback_phys_max = 0;
2207                 break;
2208         default:
2209                 scrollback_phys_max = 0;
2210                 break;
2211         }
2212
2213         scrollback_max = 0;
2214         scrollback_current = 0;
2215
2216         if (!fbcon_is_inactive(vc, info)) {
2217             ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2218             ops->update_start(info);
2219         }
2220
2221         fbcon_set_palette(vc, color_table);
2222         fbcon_clear_margins(vc, 0);
2223
2224         if (logo_shown == FBCON_LOGO_DRAW) {
2225
2226                 logo_shown = fg_console;
2227                 /* This is protected above by initmem_freed */
2228                 fb_show_logo(info, ops->rotate);
2229                 update_region(vc,
2230                               vc->vc_origin + vc->vc_size_row * vc->vc_top,
2231                               vc->vc_size_row * (vc->vc_bottom -
2232                                                  vc->vc_top) / 2);
2233                 return 0;
2234         }
2235         return 1;
2236 }
2237
2238 static void fbcon_generic_blank(struct vc_data *vc, struct fb_info *info,
2239                                 int blank)
2240 {
2241         struct fb_event event;
2242
2243         if (blank) {
2244                 unsigned short charmask = vc->vc_hi_font_mask ?
2245                         0x1ff : 0xff;
2246                 unsigned short oldc;
2247
2248                 oldc = vc->vc_video_erase_char;
2249                 vc->vc_video_erase_char &= charmask;
2250                 fbcon_clear(vc, 0, 0, vc->vc_rows, vc->vc_cols);
2251                 vc->vc_video_erase_char = oldc;
2252         }
2253
2254
2255         event.info = info;
2256         event.data = &blank;
2257         fb_notifier_call_chain(FB_EVENT_CONBLANK, &event);
2258 }
2259
2260 static int fbcon_blank(struct vc_data *vc, int blank, int mode_switch)
2261 {
2262         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2263         struct fbcon_ops *ops = info->fbcon_par;
2264
2265         if (mode_switch) {
2266                 struct fb_var_screeninfo var = info->var;
2267
2268                 ops->graphics = 1;
2269
2270                 if (!blank) {
2271                         if (info->fbops->fb_save_state)
2272                                 info->fbops->fb_save_state(info);
2273                         var.activate = FB_ACTIVATE_NOW | FB_ACTIVATE_FORCE;
2274                         fb_set_var(info, &var);
2275                         ops->graphics = 0;
2276                         ops->var = info->var;
2277                 } else if (info->fbops->fb_restore_state)
2278                         info->fbops->fb_restore_state(info);
2279         }
2280
2281         if (!fbcon_is_inactive(vc, info)) {
2282                 if (ops->blank_state != blank) {
2283                         ops->blank_state = blank;
2284                         fbcon_cursor(vc, blank ? CM_ERASE : CM_DRAW);
2285                         ops->cursor_flash = (!blank);
2286
2287                         if (fb_blank(info, blank))
2288                                 fbcon_generic_blank(vc, info, blank);
2289                 }
2290
2291                 if (!blank)
2292                         update_screen(vc);
2293         }
2294
2295         if (fbcon_is_inactive(vc, info) ||
2296             ops->blank_state != FB_BLANK_UNBLANK)
2297                 fbcon_del_cursor_timer(info);
2298         else
2299                 fbcon_add_cursor_timer(info);
2300
2301         return 0;
2302 }
2303
2304 static int fbcon_get_font(struct vc_data *vc, struct console_font *font)
2305 {
2306         u8 *fontdata = vc->vc_font.data;
2307         u8 *data = font->data;
2308         int i, j;
2309
2310         font->width = vc->vc_font.width;
2311         font->height = vc->vc_font.height;
2312         font->charcount = vc->vc_hi_font_mask ? 512 : 256;
2313         if (!font->data)
2314                 return 0;
2315
2316         if (font->width <= 8) {
2317                 j = vc->vc_font.height;
2318                 for (i = 0; i < font->charcount; i++) {
2319                         memcpy(data, fontdata, j);
2320                         memset(data + j, 0, 32 - j);
2321                         data += 32;
2322                         fontdata += j;
2323                 }
2324         } else if (font->width <= 16) {
2325                 j = vc->vc_font.height * 2;
2326                 for (i = 0; i < font->charcount; i++) {
2327                         memcpy(data, fontdata, j);
2328                         memset(data + j, 0, 64 - j);
2329                         data += 64;
2330                         fontdata += j;
2331                 }
2332         } else if (font->width <= 24) {
2333                 for (i = 0; i < font->charcount; i++) {
2334                         for (j = 0; j < vc->vc_font.height; j++) {
2335                                 *data++ = fontdata[0];
2336                                 *data++ = fontdata[1];
2337                                 *data++ = fontdata[2];
2338                                 fontdata += sizeof(u32);
2339                         }
2340                         memset(data, 0, 3 * (32 - j));
2341                         data += 3 * (32 - j);
2342                 }
2343         } else {
2344                 j = vc->vc_font.height * 4;
2345                 for (i = 0; i < font->charcount; i++) {
2346                         memcpy(data, fontdata, j);
2347                         memset(data + j, 0, 128 - j);
2348                         data += 128;
2349                         fontdata += j;
2350                 }
2351         }
2352         return 0;
2353 }
2354
2355 static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
2356                              const u8 * data, int userfont)
2357 {
2358         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2359         struct fbcon_ops *ops = info->fbcon_par;
2360         struct display *p = &fb_display[vc->vc_num];
2361         int resize;
2362         int cnt;
2363         char *old_data = NULL;
2364
2365         if (CON_IS_VISIBLE(vc) && softback_lines)
2366                 fbcon_set_origin(vc);
2367
2368         resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
2369         if (p->userfont)
2370                 old_data = vc->vc_font.data;
2371         if (userfont)
2372                 cnt = FNTCHARCNT(data);
2373         else
2374                 cnt = 256;
2375         vc->vc_font.data = (void *)(p->fontdata = data);
2376         if ((p->userfont = userfont))
2377                 REFCOUNT(data)++;
2378         vc->vc_font.width = w;
2379         vc->vc_font.height = h;
2380         if (vc->vc_hi_font_mask && cnt == 256) {
2381                 vc->vc_hi_font_mask = 0;
2382                 if (vc->vc_can_do_color) {
2383                         vc->vc_complement_mask >>= 1;
2384                         vc->vc_s_complement_mask >>= 1;
2385                 }
2386
2387                 /* ++Edmund: reorder the attribute bits */
2388                 if (vc->vc_can_do_color) {
2389                         unsigned short *cp =
2390                             (unsigned short *) vc->vc_origin;
2391                         int count = vc->vc_screenbuf_size / 2;
2392                         unsigned short c;
2393                         for (; count > 0; count--, cp++) {
2394                                 c = scr_readw(cp);
2395                                 scr_writew(((c & 0xfe00) >> 1) |
2396                                            (c & 0xff), cp);
2397                         }
2398                         c = vc->vc_video_erase_char;
2399                         vc->vc_video_erase_char =
2400                             ((c & 0xfe00) >> 1) | (c & 0xff);
2401                         vc->vc_attr >>= 1;
2402                 }
2403         } else if (!vc->vc_hi_font_mask && cnt == 512) {
2404                 vc->vc_hi_font_mask = 0x100;
2405                 if (vc->vc_can_do_color) {
2406                         vc->vc_complement_mask <<= 1;
2407                         vc->vc_s_complement_mask <<= 1;
2408                 }
2409
2410                 /* ++Edmund: reorder the attribute bits */
2411                 {
2412                         unsigned short *cp =
2413                             (unsigned short *) vc->vc_origin;
2414                         int count = vc->vc_screenbuf_size / 2;
2415                         unsigned short c;
2416                         for (; count > 0; count--, cp++) {
2417                                 unsigned short newc;
2418                                 c = scr_readw(cp);
2419                                 if (vc->vc_can_do_color)
2420                                         newc =
2421                                             ((c & 0xff00) << 1) | (c &
2422                                                                    0xff);
2423                                 else
2424                                         newc = c & ~0x100;
2425                                 scr_writew(newc, cp);
2426                         }
2427                         c = vc->vc_video_erase_char;
2428                         if (vc->vc_can_do_color) {
2429                                 vc->vc_video_erase_char =
2430                                     ((c & 0xff00) << 1) | (c & 0xff);
2431                                 vc->vc_attr <<= 1;
2432                         } else
2433                                 vc->vc_video_erase_char = c & ~0x100;
2434                 }
2435
2436         }
2437
2438         if (resize) {
2439                 int cols, rows;
2440
2441                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2442                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2443                 cols /= w;
2444                 rows /= h;
2445                 vc_resize(vc, cols, rows);
2446                 if (CON_IS_VISIBLE(vc) && softback_buf)
2447                         fbcon_update_softback(vc);
2448         } else if (CON_IS_VISIBLE(vc)
2449                    && vc->vc_mode == KD_TEXT) {
2450                 fbcon_clear_margins(vc, 0);
2451                 update_screen(vc);
2452         }
2453
2454         if (old_data && (--REFCOUNT(old_data) == 0))
2455                 kfree(old_data - FONT_EXTRA_WORDS * sizeof(int));
2456         return 0;
2457 }
2458
2459 static int fbcon_copy_font(struct vc_data *vc, int con)
2460 {
2461         struct display *od = &fb_display[con];
2462         struct console_font *f = &vc->vc_font;
2463
2464         if (od->fontdata == f->data)
2465                 return 0;       /* already the same font... */
2466         return fbcon_do_set_font(vc, f->width, f->height, od->fontdata, od->userfont);
2467 }
2468
2469 /*
2470  *  User asked to set font; we are guaranteed that
2471  *      a) width and height are in range 1..32
2472  *      b) charcount does not exceed 512
2473  *  but lets not assume that, since someone might someday want to use larger
2474  *  fonts. And charcount of 512 is small for unicode support.
2475  *
2476  *  However, user space gives the font in 32 rows , regardless of
2477  *  actual font height. So a new API is needed if support for larger fonts
2478  *  is ever implemented.
2479  */
2480
2481 static int fbcon_set_font(struct vc_data *vc, struct console_font *font, unsigned flags)
2482 {
2483         unsigned charcount = font->charcount;
2484         int w = font->width;
2485         int h = font->height;
2486         int size;
2487         int i, csum;
2488         u8 *new_data, *data = font->data;
2489         int pitch = (font->width+7) >> 3;
2490
2491         /* Is there a reason why fbconsole couldn't handle any charcount >256?
2492          * If not this check should be changed to charcount < 256 */
2493         if (charcount != 256 && charcount != 512)
2494                 return -EINVAL;
2495
2496         size = h * pitch * charcount;
2497
2498         new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
2499
2500         if (!new_data)
2501                 return -ENOMEM;
2502
2503         new_data += FONT_EXTRA_WORDS * sizeof(int);
2504         FNTSIZE(new_data) = size;
2505         FNTCHARCNT(new_data) = charcount;
2506         REFCOUNT(new_data) = 0; /* usage counter */
2507         for (i=0; i< charcount; i++) {
2508                 memcpy(new_data + i*h*pitch, data +  i*32*pitch, h*pitch);
2509         }
2510
2511         /* Since linux has a nice crc32 function use it for counting font
2512          * checksums. */
2513         csum = crc32(0, new_data, size);
2514
2515         FNTSUM(new_data) = csum;
2516         /* Check if the same font is on some other console already */
2517         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2518                 struct vc_data *tmp = vc_cons[i].d;
2519
2520                 if (fb_display[i].userfont &&
2521                     fb_display[i].fontdata &&
2522                     FNTSUM(fb_display[i].fontdata) == csum &&
2523                     FNTSIZE(fb_display[i].fontdata) == size &&
2524                     tmp->vc_font.width == w &&
2525                     !memcmp(fb_display[i].fontdata, new_data, size)) {
2526                         kfree(new_data - FONT_EXTRA_WORDS * sizeof(int));
2527                         new_data = (u8 *)fb_display[i].fontdata;
2528                         break;
2529                 }
2530         }
2531         return fbcon_do_set_font(vc, font->width, font->height, new_data, 1);
2532 }
2533
2534 static int fbcon_set_def_font(struct vc_data *vc, struct console_font *font, char *name)
2535 {
2536         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2537         const struct font_desc *f;
2538
2539         if (!name)
2540                 f = get_default_font(info->var.xres, info->var.yres);
2541         else if (!(f = find_font(name)))
2542                 return -ENOENT;
2543
2544         font->width = f->width;
2545         font->height = f->height;
2546         return fbcon_do_set_font(vc, f->width, f->height, f->data, 0);
2547 }
2548
2549 static u16 palette_red[16];
2550 static u16 palette_green[16];
2551 static u16 palette_blue[16];
2552
2553 static struct fb_cmap palette_cmap = {
2554         0, 16, palette_red, palette_green, palette_blue, NULL
2555 };
2556
2557 static int fbcon_set_palette(struct vc_data *vc, unsigned char *table)
2558 {
2559         struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
2560         int i, j, k, depth;
2561         u8 val;
2562
2563         if (fbcon_is_inactive(vc, info))
2564                 return -EINVAL;
2565
2566         if (!CON_IS_VISIBLE(vc))
2567                 return 0;
2568
2569         depth = fb_get_color_depth(&info->var, &info->fix);
2570         if (depth > 3) {
2571                 for (i = j = 0; i < 16; i++) {
2572                         k = table[i];
2573                         val = vc->vc_palette[j++];
2574                         palette_red[k] = (val << 8) | val;
2575                         val = vc->vc_palette[j++];
2576                         palette_green[k] = (val << 8) | val;
2577                         val = vc->vc_palette[j++];
2578                         palette_blue[k] = (val << 8) | val;
2579                 }
2580                 palette_cmap.len = 16;
2581                 palette_cmap.start = 0;
2582         /*
2583          * If framebuffer is capable of less than 16 colors,
2584          * use default palette of fbcon.
2585          */
2586         } else
2587                 fb_copy_cmap(fb_default_cmap(1 << depth), &palette_cmap);
2588
2589         return fb_set_cmap(&palette_cmap, info);
2590 }
2591
2592 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
2593 {
2594         unsigned long p;
2595         int line;
2596
2597         if (vc->vc_num != fg_console || !softback_lines)
2598                 return (u16 *) (vc->vc_origin + offset);
2599         line = offset / vc->vc_size_row;
2600         if (line >= softback_lines)
2601                 return (u16 *) (vc->vc_origin + offset -
2602                                 softback_lines * vc->vc_size_row);
2603         p = softback_curr + offset;
2604         if (p >= softback_end)
2605                 p += softback_buf - softback_end;
2606         return (u16 *) p;
2607 }
2608
2609 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
2610                                  int *px, int *py)
2611 {
2612         unsigned long ret;
2613         int x, y;
2614
2615         if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
2616                 unsigned long offset = (pos - vc->vc_origin) / 2;
2617
2618                 x = offset % vc->vc_cols;
2619                 y = offset / vc->vc_cols;
2620                 if (vc->vc_num == fg_console)
2621                         y += softback_lines;
2622                 ret = pos + (vc->vc_cols - x) * 2;
2623         } else if (vc->vc_num == fg_console && softback_lines) {
2624                 unsigned long offset = pos - softback_curr;
2625
2626                 if (pos < softback_curr)
2627                         offset += softback_end - softback_buf;
2628                 offset /= 2;
2629                 x = offset % vc->vc_cols;
2630                 y = offset / vc->vc_cols;
2631                 ret = pos + (vc->vc_cols - x) * 2;
2632                 if (ret == softback_end)
2633                         ret = softback_buf;
2634                 if (ret == softback_in)
2635                         ret = vc->vc_origin;
2636         } else {
2637                 /* Should not happen */
2638                 x = y = 0;
2639                 ret = vc->vc_origin;
2640         }
2641         if (px)
2642                 *px = x;
2643         if (py)
2644                 *py = y;
2645         return ret;
2646 }
2647
2648 /* As we might be inside of softback, we may work with non-contiguous buffer,
2649    that's why we have to use a separate routine. */
2650 static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
2651 {
2652         while (cnt--) {
2653                 u16 a = scr_readw(p);
2654                 if (!vc->vc_can_do_color)
2655                         a ^= 0x0800;
2656                 else if (vc->vc_hi_font_mask == 0x100)
2657                         a = ((a) & 0x11ff) | (((a) & 0xe000) >> 4) |
2658                             (((a) & 0x0e00) << 4);
2659                 else
2660                         a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
2661                             (((a) & 0x0700) << 4);
2662                 scr_writew(a, p++);
2663                 if (p == (u16 *) softback_end)
2664                         p = (u16 *) softback_buf;
2665                 if (p == (u16 *) softback_in)
2666                         p = (u16 *) vc->vc_origin;
2667         }
2668 }
2669
2670 static int fbcon_scrolldelta(struct vc_data *vc, int lines)
2671 {
2672         struct fb_info *info = registered_fb[con2fb_map[fg_console]];
2673         struct fbcon_ops *ops = info->fbcon_par;
2674         struct display *p = &fb_display[fg_console];
2675         int offset, limit, scrollback_old;
2676
2677         if (softback_top) {
2678                 if (vc->vc_num != fg_console)
2679                         return 0;
2680                 if (vc->vc_mode != KD_TEXT || !lines)
2681                         return 0;
2682                 if (logo_shown >= 0) {
2683                         struct vc_data *conp2 = vc_cons[logo_shown].d;
2684
2685                         if (conp2->vc_top == logo_lines
2686                             && conp2->vc_bottom == conp2->vc_rows)
2687                                 conp2->vc_top = 0;
2688                         if (logo_shown == vc->vc_num) {
2689                                 unsigned long p, q;
2690                                 int i;
2691
2692                                 p = softback_in;
2693                                 q = vc->vc_origin +
2694                                     logo_lines * vc->vc_size_row;
2695                                 for (i = 0; i < logo_lines; i++) {
2696                                         if (p == softback_top)
2697                                                 break;
2698                                         if (p == softback_buf)
2699                                                 p = softback_end;
2700                                         p -= vc->vc_size_row;
2701                                         q -= vc->vc_size_row;
2702                                         scr_memcpyw((u16 *) q, (u16 *) p,
2703                                                     vc->vc_size_row);
2704                                 }
2705                                 softback_in = softback_curr = p;
2706                                 update_region(vc, vc->vc_origin,
2707                                               logo_lines * vc->vc_cols);
2708                         }
2709                         logo_shown = FBCON_LOGO_CANSHOW;
2710                 }
2711                 fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
2712                 fbcon_redraw_softback(vc, p, lines);
2713                 fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
2714                 return 0;
2715         }
2716
2717         if (!scrollback_phys_max)
2718                 return -ENOSYS;
2719
2720         scrollback_old = scrollback_current;
2721         scrollback_current -= lines;
2722         if (scrollback_current < 0)
2723                 scrollback_current = 0;
2724         else if (scrollback_current > scrollback_max)
2725                 scrollback_current = scrollback_max;
2726         if (scrollback_current == scrollback_old)
2727                 return 0;
2728
2729         if (fbcon_is_inactive(vc, info))
2730                 return 0;
2731
2732         fbcon_cursor(vc, CM_ERASE);
2733
2734         offset = p->yscroll - scrollback_current;
2735         limit = p->vrows;
2736         switch (p->scrollmode) {
2737         case SCROLL_WRAP_MOVE:
2738                 info->var.vmode |= FB_VMODE_YWRAP;
2739                 break;
2740         case SCROLL_PAN_MOVE:
2741         case SCROLL_PAN_REDRAW:
2742                 limit -= vc->vc_rows;
2743                 info->var.vmode &= ~FB_VMODE_YWRAP;
2744                 break;
2745         }
2746         if (offset < 0)
2747                 offset += limit;
2748         else if (offset >= limit)
2749                 offset -= limit;
2750
2751         ops->var.xoffset = 0;
2752         ops->var.yoffset = offset * vc->vc_font.height;
2753         ops->update_start(info);
2754
2755         if (!scrollback_current)
2756                 fbcon_cursor(vc, CM_DRAW);
2757         return 0;
2758 }
2759
2760 static int fbcon_set_origin(struct vc_data *vc)
2761 {
2762         if (softback_lines)
2763                 fbcon_scrolldelta(vc, softback_lines);
2764         return 0;
2765 }
2766
2767 static void fbcon_suspended(struct fb_info *info)
2768 {
2769         struct vc_data *vc = NULL;
2770         struct fbcon_ops *ops = info->fbcon_par;
2771
2772         if (!ops || ops->currcon < 0)
2773                 return;
2774         vc = vc_cons[ops->currcon].d;
2775
2776         /* Clear cursor, restore saved data */
2777         fbcon_cursor(vc, CM_ERASE);
2778 }
2779
2780 static void fbcon_resumed(struct fb_info *info)
2781 {
2782         struct vc_data *vc;
2783         struct fbcon_ops *ops = info->fbcon_par;
2784
2785         if (!ops || ops->currcon < 0)
2786                 return;
2787         vc = vc_cons[ops->currcon].d;
2788
2789         update_screen(vc);
2790 }
2791
2792 static void fbcon_modechanged(struct fb_info *info)
2793 {
2794         struct fbcon_ops *ops = info->fbcon_par;
2795         struct vc_data *vc;
2796         struct display *p;
2797         int rows, cols;
2798
2799         if (!ops || ops->currcon < 0)
2800                 return;
2801         vc = vc_cons[ops->currcon].d;
2802         if (vc->vc_mode != KD_TEXT ||
2803             registered_fb[con2fb_map[ops->currcon]] != info)
2804                 return;
2805
2806         p = &fb_display[vc->vc_num];
2807         set_blitting_type(vc, info);
2808
2809         if (CON_IS_VISIBLE(vc)) {
2810                 var_to_display(p, &info->var, info);
2811                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2812                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2813                 cols /= vc->vc_font.width;
2814                 rows /= vc->vc_font.height;
2815                 vc_resize(vc, cols, rows);
2816                 updatescrollmode(p, info, vc);
2817                 scrollback_max = 0;
2818                 scrollback_current = 0;
2819
2820                 if (!fbcon_is_inactive(vc, info)) {
2821                     ops->var.xoffset = ops->var.yoffset = p->yscroll = 0;
2822                     ops->update_start(info);
2823                 }
2824
2825                 fbcon_set_palette(vc, color_table);
2826                 update_screen(vc);
2827                 if (softback_buf)
2828                         fbcon_update_softback(vc);
2829         }
2830 }
2831
2832 static void fbcon_set_all_vcs(struct fb_info *info)
2833 {
2834         struct fbcon_ops *ops = info->fbcon_par;
2835         struct vc_data *vc;
2836         struct display *p;
2837         int i, rows, cols;
2838
2839         if (!ops || ops->currcon < 0)
2840                 return;
2841
2842         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2843                 vc = vc_cons[i].d;
2844                 if (!vc || vc->vc_mode != KD_TEXT ||
2845                     registered_fb[con2fb_map[i]] != info)
2846                         continue;
2847
2848                 p = &fb_display[vc->vc_num];
2849                 set_blitting_type(vc, info);
2850                 var_to_display(p, &info->var, info);
2851                 cols = FBCON_SWAP(ops->rotate, info->var.xres, info->var.yres);
2852                 rows = FBCON_SWAP(ops->rotate, info->var.yres, info->var.xres);
2853                 cols /= vc->vc_font.width;
2854                 rows /= vc->vc_font.height;
2855                 vc_resize(vc, cols, rows);
2856
2857                 if (CON_IS_VISIBLE(vc)) {
2858                         updatescrollmode(p, info, vc);
2859                         scrollback_max = 0;
2860                         scrollback_current = 0;
2861
2862                         if (!fbcon_is_inactive(vc, info)) {
2863                             ops->var.xoffset = ops->var.yoffset =
2864                                 p->yscroll = 0;
2865                             ops->update_start(info);
2866                         }
2867
2868                         fbcon_set_palette(vc, color_table);
2869                         update_screen(vc);
2870                         if (softback_buf)
2871                                 fbcon_update_softback(vc);
2872                 }
2873         }
2874
2875         ops->p = &fb_display[ops->currcon];
2876 }
2877
2878 static int fbcon_mode_deleted(struct fb_info *info,
2879                               struct fb_videomode *mode)
2880 {
2881         struct fb_info *fb_info;
2882         struct display *p;
2883         int i, j, found = 0;
2884
2885         /* before deletion, ensure that mode is not in use */
2886         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2887                 j = con2fb_map[i];
2888                 if (j == -1)
2889                         continue;
2890                 fb_info = registered_fb[j];
2891                 if (fb_info != info)
2892                         continue;
2893                 p = &fb_display[i];
2894                 if (!p || !p->mode)
2895                         continue;
2896                 if (fb_mode_is_equal(p->mode, mode)) {
2897                         found = 1;
2898                         break;
2899                 }
2900         }
2901         return found;
2902 }
2903
2904 static int fbcon_fb_unregistered(int idx)
2905 {
2906         int i;
2907
2908         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2909                 if (con2fb_map[i] == idx)
2910                         con2fb_map[i] = -1;
2911         }
2912
2913         if (idx == info_idx) {
2914                 info_idx = -1;
2915
2916                 for (i = 0; i < FB_MAX; i++) {
2917                         if (registered_fb[i] != NULL) {
2918                                 info_idx = i;
2919                                 break;
2920                         }
2921                 }
2922         }
2923
2924         if (info_idx != -1) {
2925                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2926                         if (con2fb_map[i] == -1)
2927                                 con2fb_map[i] = info_idx;
2928                 }
2929         }
2930
2931         if (!num_registered_fb)
2932                 unregister_con_driver(&fb_con);
2933
2934         return 0;
2935 }
2936
2937 static int fbcon_fb_registered(int idx)
2938 {
2939         int ret = 0, i;
2940
2941         if (info_idx == -1) {
2942                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2943                         if (con2fb_map_boot[i] == idx) {
2944                                 info_idx = idx;
2945                                 break;
2946                         }
2947                 }
2948
2949                 if (info_idx != -1)
2950                         ret = fbcon_takeover(1);
2951         } else {
2952                 for (i = first_fb_vc; i <= last_fb_vc; i++) {
2953                         if (con2fb_map_boot[i] == idx &&
2954                             con2fb_map[i] == -1)
2955                                 set_con2fb_map(i, idx, 0);
2956                 }
2957         }
2958
2959         return ret;
2960 }
2961
2962 static void fbcon_fb_blanked(struct fb_info *info, int blank)
2963 {
2964         struct fbcon_ops *ops = info->fbcon_par;
2965         struct vc_data *vc;
2966
2967         if (!ops || ops->currcon < 0)
2968                 return;
2969
2970         vc = vc_cons[ops->currcon].d;
2971         if (vc->vc_mode != KD_TEXT ||
2972                         registered_fb[con2fb_map[ops->currcon]] != info)
2973                 return;
2974
2975         if (CON_IS_VISIBLE(vc)) {
2976                 if (blank)
2977                         do_blank_screen(0);
2978                 else
2979                         do_unblank_screen(0);
2980         }
2981         ops->blank_state = blank;
2982 }
2983
2984 static void fbcon_new_modelist(struct fb_info *info)
2985 {
2986         int i;
2987         struct vc_data *vc;
2988         struct fb_var_screeninfo var;
2989         const struct fb_videomode *mode;
2990
2991         for (i = first_fb_vc; i <= last_fb_vc; i++) {
2992                 if (registered_fb[con2fb_map[i]] != info)
2993                         continue;
2994                 if (!fb_display[i].mode)
2995                         continue;
2996                 vc = vc_cons[i].d;
2997                 display_to_var(&var, &fb_display[i]);
2998                 mode = fb_find_nearest_mode(fb_display[i].mode,
2999                                             &info->modelist);
3000                 fb_videomode_to_var(&var, mode);
3001
3002                 if (vc)
3003                         fbcon_set_disp(info, &var, vc);
3004                 else
3005                         fbcon_preset_disp(info, &var, i);
3006
3007         }
3008 }
3009
3010 static int fbcon_event_notify(struct notifier_block *self,
3011                               unsigned long action, void *data)
3012 {
3013         struct fb_event *event = data;
3014         struct fb_info *info = event->info;
3015         struct fb_videomode *mode;
3016         struct fb_con2fbmap *con2fb;
3017         int ret = 0;
3018
3019         /*
3020          * ignore all events except driver registration and deregistration
3021          * if fbcon is not active
3022          */
3023         if (fbcon_has_exited && !(action == FB_EVENT_FB_REGISTERED ||
3024                                   action == FB_EVENT_FB_UNREGISTERED))
3025                 goto done;
3026
3027         switch(action) {
3028         case FB_EVENT_SUSPEND:
3029                 fbcon_suspended(info);
3030                 break;
3031         case FB_EVENT_RESUME:
3032                 fbcon_resumed(info);
3033                 break;
3034         case FB_EVENT_MODE_CHANGE:
3035                 fbcon_modechanged(info);
3036                 break;
3037         case FB_EVENT_MODE_CHANGE_ALL:
3038                 fbcon_set_all_vcs(info);
3039                 break;
3040         case FB_EVENT_MODE_DELETE:
3041                 mode = event->data;
3042                 ret = fbcon_mode_deleted(info, mode);
3043                 break;
3044         case FB_EVENT_FB_REGISTERED:
3045                 ret = fbcon_fb_registered(info->node);
3046                 break;
3047         case FB_EVENT_FB_UNREGISTERED:
3048                 ret = fbcon_fb_unregistered(info->node);
3049                 break;
3050         case FB_EVENT_SET_CONSOLE_MAP:
3051                 con2fb = event->data;
3052                 ret = set_con2fb_map(con2fb->console - 1,
3053                                      con2fb->framebuffer, 1);
3054                 break;
3055         case FB_EVENT_GET_CONSOLE_MAP:
3056                 con2fb = event->data;
3057                 con2fb->framebuffer = con2fb_map[con2fb->console - 1];
3058                 break;
3059         case FB_EVENT_BLANK:
3060                 fbcon_fb_blanked(info, *(int *)event->data);
3061                 break;
3062         case FB_EVENT_NEW_MODELIST:
3063                 fbcon_new_modelist(info);
3064                 break;
3065         }
3066
3067 done:
3068         return ret;
3069 }
3070
3071 /*
3072  *  The console `switch' structure for the frame buffer based console
3073  */
3074
3075 static const struct consw fb_con = {
3076         .owner                  = THIS_MODULE,
3077         .con_startup            = fbcon_startup,
3078         .con_init               = fbcon_init,
3079         .con_deinit             = fbcon_deinit,
3080         .con_clear              = fbcon_clear,
3081         .con_putc               = fbcon_putc,
3082         .con_putcs              = fbcon_putcs,
3083         .con_cursor             = fbcon_cursor,
3084         .con_scroll             = fbcon_scroll,
3085         .con_bmove              = fbcon_bmove,
3086         .con_switch             = fbcon_switch,
3087         .con_blank              = fbcon_blank,
3088         .con_font_set           = fbcon_set_font,
3089         .con_font_get           = fbcon_get_font,
3090         .con_font_default       = fbcon_set_def_font,
3091         .con_font_copy          = fbcon_copy_font,
3092         .con_set_palette        = fbcon_set_palette,
3093         .con_scrolldelta        = fbcon_scrolldelta,
3094         .con_set_origin         = fbcon_set_origin,
3095         .con_invert_region      = fbcon_invert_region,
3096         .con_screen_pos         = fbcon_screen_pos,
3097         .con_getxy              = fbcon_getxy,
3098         .con_resize             = fbcon_resize,
3099 };
3100
3101 static struct notifier_block fbcon_event_notifier = {
3102         .notifier_call  = fbcon_event_notify,
3103 };
3104
3105 static ssize_t store_rotate(struct class_device *class_device,
3106                             const char *buf, size_t count)
3107 {
3108         struct fb_info *info;
3109         int rotate, idx;
3110         char **last = NULL;
3111
3112         if (fbcon_has_exited)
3113                 return count;
3114
3115         acquire_console_sem();
3116         idx = con2fb_map[fg_console];
3117
3118         if (idx == -1 || registered_fb[idx] == NULL)
3119                 goto err;
3120
3121         info = registered_fb[idx];
3122         rotate = simple_strtoul(buf, last, 0);
3123         fbcon_rotate(info, rotate);
3124 err:
3125         release_console_sem();
3126         return count;
3127 }
3128
3129 static ssize_t store_rotate_all(struct class_device *class_device,
3130                                 const char *buf, size_t count)
3131 {
3132         struct fb_info *info;
3133         int rotate, idx;
3134         char **last = NULL;
3135
3136         if (fbcon_has_exited)
3137                 return count;
3138
3139         acquire_console_sem();
3140         idx = con2fb_map[fg_console];
3141
3142         if (idx == -1 || registered_fb[idx] == NULL)
3143                 goto err;
3144
3145         info = registered_fb[idx];
3146         rotate = simple_strtoul(buf, last, 0);
3147         fbcon_rotate_all(info, rotate);
3148 err:
3149         release_console_sem();
3150         return count;
3151 }
3152
3153 static ssize_t show_rotate(struct class_device *class_device, char *buf)
3154 {
3155         struct fb_info *info;
3156         int rotate = 0, idx;
3157
3158         if (fbcon_has_exited)
3159                 return 0;
3160
3161         acquire_console_sem();
3162         idx = con2fb_map[fg_console];
3163
3164         if (idx == -1 || registered_fb[idx] == NULL)
3165                 goto err;
3166
3167         info = registered_fb[idx];
3168         rotate = fbcon_get_rotate(info);
3169 err:
3170         release_console_sem();
3171         return snprintf(buf, PAGE_SIZE, "%d\n", rotate);
3172 }
3173
3174 static struct class_device_attribute class_device_attrs[] = {
3175         __ATTR(rotate, S_IRUGO|S_IWUSR, show_rotate, store_rotate),
3176         __ATTR(rotate_all, S_IWUSR, NULL, store_rotate_all),
3177 };
3178
3179 static int fbcon_init_class_device(void)
3180 {
3181         int i, error = 0;
3182
3183         fbcon_has_sysfs = 1;
3184
3185         for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++) {
3186                 error = class_device_create_file(fbcon_class_device,
3187                                                  &class_device_attrs[i]);
3188
3189                 if (error)
3190                         break;
3191         }
3192
3193         if (error) {
3194                 while (--i >= 0)
3195                         class_device_remove_file(fbcon_class_device,
3196                                                  &class_device_attrs[i]);
3197
3198                 fbcon_has_sysfs = 0;
3199         }
3200
3201         return 0;
3202 }
3203
3204 static void fbcon_start(void)
3205 {
3206         if (num_registered_fb) {
3207                 int i;
3208
3209                 acquire_console_sem();
3210
3211                 for (i = 0; i < FB_MAX; i++) {
3212                         if (registered_fb[i] != NULL) {
3213                                 info_idx = i;
3214                                 break;
3215                         }
3216                 }
3217
3218                 release_console_sem();
3219                 fbcon_takeover(0);
3220         }
3221 }
3222
3223 static void fbcon_exit(void)
3224 {
3225         struct fb_info *info;
3226         int i, j, mapped;
3227
3228         if (fbcon_has_exited)
3229                 return;
3230
3231 #ifdef CONFIG_ATARI
3232         free_irq(IRQ_AUTO_4, fb_vbl_handler);
3233 #endif
3234 #ifdef CONFIG_MAC
3235         if (MACH_IS_MAC && vbl_detected)
3236                 free_irq(IRQ_MAC_VBL, fb_vbl_handler);
3237 #endif
3238
3239         kfree((void *)softback_buf);
3240         softback_buf = 0UL;
3241
3242         for (i = 0; i < FB_MAX; i++) {
3243                 mapped = 0;
3244                 info = registered_fb[i];
3245
3246                 if (info == NULL)
3247                         continue;
3248
3249                 for (j = first_fb_vc; j <= last_fb_vc; j++) {
3250                         if (con2fb_map[j] == i)
3251                                 mapped = 1;
3252                 }
3253
3254                 if (mapped) {
3255                         if (info->fbops->fb_release)
3256                                 info->fbops->fb_release(info, 0);
3257                         module_put(info->fbops->owner);
3258
3259                         if (info->fbcon_par) {
3260                                 struct fbcon_ops *ops = info->fbcon_par;
3261
3262                                 fbcon_del_cursor_timer(info);
3263                                 kfree(ops->cursor_src);
3264                                 kfree(info->fbcon_par);
3265                                 info->fbcon_par = NULL;
3266                         }
3267
3268                         if (info->queue.func == fb_flashcursor)
3269                                 info->queue.func = NULL;
3270                 }
3271         }
3272
3273         fbcon_has_exited = 1;
3274 }
3275
3276 static int __init fb_console_init(void)
3277 {
3278         int i;
3279
3280         acquire_console_sem();
3281         fb_register_client(&fbcon_event_notifier);
3282         fbcon_class_device =
3283             class_device_create(fb_class, NULL, MKDEV(0, 0), NULL, "fbcon");
3284
3285         if (IS_ERR(fbcon_class_device)) {
3286                 printk(KERN_WARNING "Unable to create class_device "
3287                        "for fbcon; errno = %ld\n",
3288                        PTR_ERR(fbcon_class_device));
3289                 fbcon_class_device = NULL;
3290         } else
3291                 fbcon_init_class_device();
3292
3293         for (i = 0; i < MAX_NR_CONSOLES; i++)
3294                 con2fb_map[i] = -1;
3295
3296         release_console_sem();
3297         fbcon_start();
3298         return 0;
3299 }
3300
3301 module_init(fb_console_init);
3302
3303 #ifdef MODULE
3304
3305 static void __exit fbcon_deinit_class_device(void)
3306 {
3307         int i;
3308
3309         if (fbcon_has_sysfs) {
3310                 for (i = 0; i < ARRAY_SIZE(class_device_attrs); i++)
3311                         class_device_remove_file(fbcon_class_device,
3312                                                  &class_device_attrs[i]);
3313
3314                 fbcon_has_sysfs = 0;
3315         }
3316 }
3317
3318 static void __exit fb_console_exit(void)
3319 {
3320         acquire_console_sem();
3321         fb_unregister_client(&fbcon_event_notifier);
3322         fbcon_deinit_class_device();
3323         class_device_destroy(fb_class, MKDEV(0, 0));
3324         fbcon_exit();
3325         release_console_sem();
3326         unregister_con_driver(&fb_con);
3327 }
3328
3329 module_exit(fb_console_exit);
3330
3331 #endif
3332
3333 MODULE_LICENSE("GPL");